Source: https://patents.google.com/patent/CN105144761B/en
Timestamp: 2020-05-30 00:04:43
Document Index: 524811763

Matched Legal Cases: ['art 701', 'art 801', 'art 1100', 'art 1200', 'art 1100', 'art 1100', 'art 11']

CN105144761B - System and method for the mark in neighborhood aware network - Google Patents
System and method for the mark in neighborhood aware network Download PDF
CN105144761B
CN105144761B CN201480022725.9A CN201480022725A CN105144761B CN 105144761 B CN105144761 B CN 105144761B CN 201480022725 A CN201480022725 A CN 201480022725A CN 105144761 B CN105144761 B CN 105144761B
CN201480022725.9A
CN105144761A (en
A·K·舒克拉
2013-04-23 Priority to US201361815184P priority Critical
2013-04-23 Priority to US61/815,184 priority
2013-05-13 Priority to US201361822860P priority
2013-05-13 Priority to US61/822,860 priority
2014-04-11 Priority to US14/250,809 priority
2014-04-11 Priority to US14/250,809 priority patent/US9872227B2/en
2014-04-15 Priority to PCT/US2014/034177 priority patent/WO2014176079A1/en
2015-12-09 Publication of CN105144761A publication Critical patent/CN105144761A/en
2019-01-01 Publication of CN105144761B publication Critical patent/CN105144761B/en
This document describes method, equipment and the computer program products synchronous for the wireless device in peer-to-peer network.In one aspect, a kind of method for being communicated in neighborhood aware network (NAN) is provided.This method includes generating NAN frame, which includes one or more of the first address field, the second address field, third address field, third address field and information element.This method further comprises the coding NAN identifier at least one of the first address field, third address field and information element.This method further comprises transmitting the NAN frame.
System and method for the mark in neighborhood aware network
Present application relates generally to wireless communication, more particularly relate to the network identity in peer to peer wireless network is System, method and apparatus.
In many telecommunication systems, communication network, which be used to exchange between separated interactive device on several spaces, to disappear Breath.Network can classify according to geographic range, which may, for example, be urban area, regional area or personal area Domain.Such network can be respectively designated wide area network (WAN), Metropolitan Area Network (MAN) (MAN), local area network (LAN), WLAN (WLAN), neighborhood aware network (NAN) or personal area network (PAN).Network is also according to for interconnect various network node and equipment Exchange/route technology (for example, circuit switching is relative to packet switch), the physical medium being used for transmission type (for example, wired Relative to wireless) and used internet protocol set collection (for example, internet protocol set collection, SONET (synchronous optical networking), Ethernet Deng) and it is different.
When network element is movement and thus has dynamic connectivity demand, or in the network architecture with self-organizing (ad hoc) topological structure rather than fixed topology are come in the case where being formed, wireless network is often preferred.Wireless network Invisible physical medium is used with non-guidance communication mode using electromagnetic wave in the frequency bands such as radio, microwave, infrared, light. When compared with fixed cable network, wireless network advantageously facilitates user mobility and quick field deployment.
Equipment in wireless network can to from transmitting and/or receive information each other.In order to execute various communications, respectively set It is standby to be coordinated according to one or more network parameters.In this way, each equipment exchange information is to coordinate its activity.Wish to change Into for identifying system, the method and apparatus of wireless network and its messaging parameter.
System as described herein, method, equipment and computer program product respectively have several aspects, wherein not only It is responsible for its desired properties by any single aspect.In the feelings for not limiting the scope of the present invention as expressed by appended claims Under condition, some features briefly discussed below.After considering this discussion, and especially entitled " detailed description " is being read After chapters and sections, it will be understood that how favorable characteristics of the invention include the power consumption reduced when introducing equipment on medium.
An aspect of this disclosure provides a kind of method communicated in field aware network (NAN).This method Including generating NAN frame, which includes in the first address field, the second address field, third address field and information element One or more.This method further comprises by NAN identifier code in the first address field, third address field and information word In at least one of element.This method further comprises transmitting the NAN frame.
In various embodiments, NAN frame may include sync beacon or discovery frame.First address field may include having Multicast instruction cluster identifier symbol.Second address field may include source address.Third address field may include indicating the frame It is the value of NAN frame.
In various embodiments, NAN frame may include sync beacon or discovery frame.First address field may include instruction The frame is the value of NAN frame.Second address field may include source address.Third address field may include cluster identifier symbol.
In various embodiments, NAN frame may include multicast discovery frame.First address field may include having the finger that multicasts The cluster identifier symbol shown.Second address field may include source address.Third address field may include indicating that the frame is NAN frame Value.
In various embodiments, NAN frame may include multicast discovery frame.First address field may include indicating that the frame is The value of NAN frame.Second address field may include source address.Third address field may include cluster identifier symbol.
In various embodiments, NAN frame may include unicast discovery frame.First address field may include destination Location.Second address field may include source address.Third address field may include the cluster identifier symbol that there is unicast to indicate.? In various embodiments, indicate the frame be the value of NAN frame may include be attached to instruction NAN frame tissue unique identification (OUI) value 0xFF.
In various embodiments, the first address field may include A1 field, and the second address field may include A2 field, And third address field may include A3 field.In various embodiments, the first address field may include receiver address Field and the second address field may include destination address field.In various embodiments, third address field can wrap Include basic service set identifier (BSSID) field.In various embodiments, NAN identifier may include the tissue for indicating NAN frame Unique identification (OUI).NAN identifier may further include one or more ratios of the hash comprising application identifier It is special.NAN identifier may further include the minimum effective eight-bit group for indicating specific NAN.NAN identifier can be wrapped further Include minimum effective eight-bit group of instruction wildcard NAN.NAN identifier may further include the secondary identifier of instruction NAN frame, and And NAN frame may further include the subsequent field for indicating specific NAN.
In various embodiments, this method, which may further include, can be coded in the first address field in NAN identifier Make the multicast flag set of NAN identifier when middle.This method, which may further include, can be coded in the second ground in NAN identifier Multicast mark is set to cancel set when in the field of location.
In various embodiments, this method may further include mark one or more NAN characteristic.This method can be into One step include by one or more NAN characteristic encoding in NAN identifier.One or more NAN characteristic may include with Lower one or more persons: the identifier of NAN frame, device cluster set identifier, one or more NAN cluster be can be about the NAN frame Parameter, discovery window indicator, discovery period indicator, master control preference number, the equipment energy for finding channel indicator, transmission equipment Power indicator, window information indicator, NAN basic service set identifier, cluster size instruction or estimation, clock accuracy refer to Show and clock type indicates.
On the other hand providing one kind is configured to the equipment communicated in neighborhood aware network (NAN).The equipment packet Processor is included, which is configured to generate NAN frame, which includes the first address field, the second address field, third One or more of location field and information element.The processor can be further configured into NAN identifier code the first In at least one of location field, third address field and information element.The equipment further comprises being configured to transmit the NAN frame Transmitter.
In various embodiments, the first address field may include A1 field, and the second address field may include A2 field, And third address field may include A3 field.In various embodiments, the first address field may include receiver address Field and the second address field may include destination address field.In various embodiments, third address field can wrap Include basic service set identifier (BSSID) field.NAN identifier may include the tissue unique identification for indicating NAN frame (OUI).NAN identifier may further include one or more bits of the hash comprising application identifier.NAN identifier can To further comprise the minimum effective eight-bit group for indicating specific NAN.NAN identifier may further include instruction wildcard NAN Minimum effective eight-bit group.NAN identifier may further include the secondary identifier of instruction NAN frame, and NAN frame can be into One step includes indicating the subsequent field of specific NAN.
In various embodiments, which can be further configured to that the first address can be coded in NAN identifier Make the multicast flag set of NAN identifier when in field.The processor can be further configured to be encoded in NAN identifier Multicast mark is set to cancel set when in the second address field.
In various embodiments, which can be further configured to identify one or more NAN characteristics.The processor It can be further configured to one or more NAN characteristic encoding in NAN identifier.One or more NAN characteristic can With include it is following one or more: can be the identifier of NAN frame, device cluster set identifier, one or more about the NAN frame NAN cluster parameter, discovery window indicator, discovery period indicator, discovery channel indicator, the master control preference of transmission equipment Number, the instruction of capacity of equipment indicator, window information indicator, NAN basic service set identifier, cluster size or estimation, clock Accuracy instruction and clock type instruction.
On the other hand a kind of equipment for being communicated in neighborhood aware network (NAN) is provided.The equipment includes For generating the device of NAN frame, which includes the first address field, the second address field, third address field and information word One or more of element.The equipment further comprise for by NAN identifier code in the first address field, third address word Device at least one of section and information element.The equipment further comprises the device for transmitting the NAN frame.
In various embodiments, which may further include for that can be coded in the first address in NAN identifier Make the device of the multicast flag set of NAN identifier when in field.The equipment may further include in NAN identifier energy Multicast mark is set to cancel the device of set when being coded in the second address field.
In various embodiments, which may further include the device for identifying one or more NAN characteristics.It should Equipment may further include for the device by one or more NAN characteristic encoding in NAN identifier.This or more A NAN characteristic may include it is following one or more: can be the identifier of NAN frame, equipment cluster identifier about the NAN frame Symbol, one or more NAN cluster parameter, discovery window indicator, discovery period indicator, discovery channel indicator, transmission are set Standby master control preference number, capacity of equipment indicator, window information indicator, NAN basic service set identifier, cluster size instruction Or estimation, clock accuracy instruction and clock type instruction.
On the other hand a kind of non-transient computer-readable media is provided.The medium includes generating device when executed The code of neighborhood aware network (NAN) frame, the NAN frame include the first address field, the second address field, third address field and One or more of information element.The medium further comprises making the device by NAN identifier code when executed Code at least one of one address field, third address field and information element.The medium further comprises being held The device is set to transmit the code of the NAN frame when row.
In various embodiments, which may further include enables the device in NAN identifier quilt when executed Make the code of the multicast flag set of NAN identifier when encoding in the first address field.The medium may further include It is performed the generation for enabling the device that multicast mark to be made to cancel set when NAN identifier is coded in the second address field Code.
In various embodiments, which may further include makes the device identification one or more when executed The code of NAN characteristic.The medium may further include makes the device by one or more NAN characteristic encoding when executed Code in NAN identifier.One or more NAN characteristic may include it is following one or more: can be with about the NAN frame It is identifier, device cluster set identifier, one or more NAN cluster parameter, the discovery window indicator, discovery period of NAN frame Indicator, master control preference number, capacity of equipment indicator, the window information indicator, NAN for finding channel indicator, transmission equipment Basic service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock type instruction.
On the other hand a kind of method for being communicated in neighborhood aware network (NAN) is provided.This method includes NAN frame is received, which includes one of the first address field, the second address field, third address field and information element Or more persons.This method further comprise based at least one of the first address field, third address field and information element come Determine NAN identifier.
In various embodiments, the first address field may include A1 field, and the second address field may include A2 field, And third address field may include A3 field.In various embodiments, the first address field may include receiver address Field and the second address field may include destination address field.In various embodiments, third address field can wrap Include basic service set identifier (BSSID) field.NAN identifier may include the tissue unique identification for indicating NAN frame (OUI).NAN identifier may further include one or more bits of the hash comprising application identifier.NAN identifier can To further comprise the minimum effective eight-bit group for indicating specific NAN.NAN identifier may further include instruction wildcard NAN Minimum effective eight-bit group.NAN identifier may further include the secondary identifier of instruction NAN frame, and NAN frame can be into One step includes indicating the subsequent field of specific NAN.In various embodiments, the first ground can be coded in NAN identifier Make the multicast flag set of NAN identifier when in the field of location.It can be when NAN identifier can be coded in the second address field The multicast mark is set to cancel set.
In various embodiments, one or more NAN that this method may further include in decoding NAN identifier are special Property.This method may further include using one or more NAN characteristic.One or more NAN characteristic may include following One or more: can be the identifier of NAN frame, device cluster set identifier, one or more NAN cluster ginseng about the NAN frame Number, discovery window indicator, discovery period indicator, discovery channel indicator, the master control preference number of transmission equipment, capacity of equipment Indicator, window information indicator, NAN basic service set identifier, cluster size indicate or estimation, clock accuracy indicate, And clock type instruction.
On the other hand providing one kind is configured to the equipment communicated in neighborhood aware network (NAN).The equipment packet Include be configured to receive NAN frame receiver, the NAN frame include the first address field, the second address field, third address field and One or more of information element.The equipment further comprise be configured to based on the first address field, third address field and At least one of information element determines the processor of NAN identifier.
In various embodiments, which can be further configured to one or more NAN in decoding NAN identifier Characteristic.The processor can be further configured to apply one or more NAN characteristic.One or more NAN characteristic can wrap Include it is following one or more: can be the identifier of NAN frame, device cluster set identifier, one or more NAN about the NAN frame Cluster parameter, discovery window indicator, discovery period indicator, discovery channel indicator, transmission equipment master control preference number, set Standby capability indicator, window information indicator, NAN basic service set identifier, cluster size instruction or estimation, clock accuracy Instruction and clock type instruction.
On the other hand a kind of equipment for being communicated in neighborhood aware network (NAN) is provided.The equipment includes For receiving the device of NAN frame, which includes the first address field, the second address field, third address field and information word One or more of element.The equipment further comprises for based on the first address field, third address field and information element At least one of determine the device of NAN identifier.
In various embodiments, the first address field may include A1 field, and the second address field may include A2 field, And third address field may include A3 field.In various embodiments, the first address field may include receiver address Field and the second address field may include destination address field.In various embodiments, third address field can wrap Include basic service set identifier (BSSID) field.NAN identifier may include the tissue unique identification for indicating NAN frame (OUI).NAN identifier may further include one or more bits of the hash comprising application identifier.NAN identifier can To further comprise the minimum effective eight-bit group for indicating specific NAN.NAN identifier may further include instruction wildcard NAN Minimum effective eight-bit group.NAN identifier may further include the secondary identifier of instruction NAN frame, and NAN frame can be into One step includes indicating the subsequent field of specific NAN.It can make NAN when NAN identifier can be coded in the first address field The multicast flag set of identifier.The multicast mark can be made to take when NAN identifier can be coded in the second address field Disappear set.
In various embodiments, which may further include for decoding one or more NAN in NAN identifier The device of characteristic.The equipment may further include the device for application one or more NAN characteristic.The one or more NAN characteristic may include it is following one or more: about the NAN frame can be the identifier of NAN frame, device cluster set identifier, One or more NAN cluster parameters, discovery window indicator, discovery period indicator, discovery channel indicator, transmission equipment Master control preference number, capacity of equipment indicator, window information indicator, NAN basic service set identifier, cluster size instruction are estimated Meter, clock accuracy instruction and clock type instruction.
On the other hand a kind of non-transient computer-readable media is provided.The medium includes receiving device when executed The code of neighborhood aware network (NAN) frame, the NAN frame include the first address field, the second address field, third address field and One or more of information element.The medium further comprises that the device is made to be based on the first address field, the when executed At least one of three address fields and information element determine the code of NAN identifier.
In various embodiments, which, which may further include, makes when executed in device decoding NAN identifier One or more NAN characteristics code.The medium may further include makes the device using one or more when executed The code of a NAN characteristic.One or more NAN characteristic may include it is following one or more: can be about the NAN frame The identifier of NAN frame, device cluster set identifier, one or more NAN cluster parameter, discovery window indicator, discovery period refer to Show master control preference number, capacity of equipment indicator, window information indicator, the NAN base of symbol, discovery channel indicator, transmission equipment This service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock type instruction.
Figure 1A illustrates the example of wireless communication system.
Figure 1B illustrates another example of wireless communication system.
Fig. 2 illustrates the functional block diagram for the wireless device that can be used in the wireless communication system of Fig. 1.
Fig. 3 illustrates the example that the communication system of all aspects of this disclosure wherein can be used.
Fig. 4 explain exemplary realization according to the present invention for STA for communicating with AP the exemplary discovery to find NAN Window structure.
Fig. 5 A shows the exemplary structure of media access control (MAC) frame 500.
Fig. 5 B shows the exemplary NAN identifier that can be used in the NAN of Fig. 3.
Fig. 6 A shows the Exemplary attributes of the NAN information element (IE) in the NAN that can be used in Fig. 3.
Fig. 6 B shows the another exemplary attribute of the NAN information element (IE) in the NAN that can be used in Fig. 3.
Fig. 7 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.
Fig. 8 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.
Fig. 9 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.
It may include message for synchronous time value that Figure 10, which is illustrated,.
Figure 11 shows the transmission according to an embodiment and receives the flow chart of the method for synchronization frame.
Figure 12 shows the flow chart of the method for the transmission synchronization frame according to an embodiment.
Figure 13 shows the flow chart for the example wireless communication means that can be used in the wireless communication system 100 of Fig. 1.
Figure 14 shows the stream for the another exemplary wireless communications method that can be used in the wireless communication system 100 of Fig. 1 Cheng Tu.
Mean " being used as example, example or explanation " using word " exemplary " herein.Here depicted as " exemplary " Any embodiment be not necessarily to be construed as preferred or advantageous over other embodiments.This novelty system is described more fully with referring to the drawings The various aspects of system, device and method.However, the disclosure can be implemented with many different forms and should not be construed as being defined Any specific structure or function provided in the whole text in the disclosure.Specifically, providing these aspects is to make the disclosure that will be It is thorough and complete, and it will convey completely the scope of the present disclosure to those skilled in the art.Based on introduction herein, originally Field technical staff is it will be appreciated that the scope of the present disclosure is intended to cover these novel system, device and sides disclosed herein Any aspect of method, no matter it is independently realized or combines realization with any other aspect of the invention.For example, can be with Carry out realization device using any number of the aspects set forth herein or practices method.In addition, the scope of the present invention is intended to cover Used as the supplement of various aspects of the present invention set forth herein or different other structures, functionality or Structure and the functional device or method to practice.It should be appreciated that any aspect disclosed herein can be by the one of claim A or multiple elements are implemented.
Although specific aspects are described herein, the various variants and displacement but in terms of these fall in the scope of the present disclosure it It is interior.Although referring to some benefits and advantage of preferred aspect, the scope of the present disclosure be not intended to be limited to particular benefits, Purposes or target.On the contrary, all aspects of this disclosure be intended to broadly be suitable for different wireless technologys, system configuration, network and Transport protocol, some of them are by example in attached drawing and below to explaining in the description of preferred aspect.The detailed description and the accompanying drawings are only Only explain the disclosure and the non-limiting disclosure, the scope of the present disclosure are defined by appended claims and its equivalent arrangements.
Radio network technique may include various types of WLANs (WLAN).WLAN, which can be used for using, to be widely used Networking protocol by nearby apparatus interconnection together.However, various aspects described herein can be applied to any communication Standard, such as wireless protocols.
In some implementations, WLAN includes the various equipment as the component of access wireless network.For example, can there are two types of The equipment of type: access point (" AP ") and client (also known as standing, or " STA ").In general, AP can be used as the maincenter of WLAN Or base station, and STA is used as the user of WLAN.For example, STA can be laptop computer, personal digital assistant (PDA), movement Phone etc..In one example, STA is connected to AP via the Radio Link for following WiFi (for example, 802.11 agreement of IEEE) to obtain Obtain internet or the general connectivity to other wide area networks.In some implementations, STA may also used as AP.
Access point (" AP ") may also include, be implemented as or referred to as B node, radio network controller (" RNC "), Evolved B node, base station controller (" BSC "), base transceiver station (" BTS "), base station (" BS "), transceiver function (" TF "), Radio Router, wireless set or some other term.
Stand " STA " may also include, be implemented as or referred to as access terminal (" AT "), subscriber station, subscriber unit, movement It stands, distant station, remote terminal, user terminal, user agent, user equipment, user equipment or some other term.In some realities In existing, access terminal may include cellular phone, wireless phone, Session initiation Protocol (" SIP ") phone, wireless local loop (" WLL ") stand, personal digital assistant (" PDA), the handheld device with wireless connection capability or is connected to wireless-modulated solution Adjust other certain suitable processing equipments or wireless device of device." therefore, one or more aspects taught herein can be received Enter to phone (for example, cellular phone or smart phone), computer (for example, laptop devices), portable communication device, hold Machine, portable computing device (for example, personal digital assistant), amusement equipment are (for example, music or video equipment or satellite radio Electricity), game station or system, global positioning system equipment or be configured to it is suitable via any other of wireless medium communication Equipment in.
As discussed above, one or more nodes of peer-to-peer network can transmit synchronization message to coordinate one or more A availability window between each node of the peer-to-peer network for communicating.These nodes can also exchange discovery inquiry and response To provide the service discovery between the equipment operated in identical peer-to-peer network or neighborhood aware network.In some respects, adjacent Domain aware network can be considered as peer-to-peer network or self-organizing network.These nodes are repeatedly revived from dormant state with periodicity Ground transmission and/or reception synchronization message and discovery message.If node 106 can rest on more long dormant state to save function Rate from dormant state without reviving so that synchronization message is transmitted and/or received on network and will be then advantageous.In addition, by node 106 transmission are synchronous with re-transmission and discovery message can introduce a large amount of unnecessary expenses to network.
In some embodiments, only Node subsets can be configured to transmit synchronization message, such as to reduce network congestion. In some embodiments, Node subsets can be designated or be elected as " master control " node.For example, the node of external power source can be accessed It can be elected as main controlled node, and the node by power of battery running may not be elected as main controlled node.In some embodiments In, one or more main controlled nodes can transmit synchronization message, and other nodes may not transmit synchronization message.In some embodiments In, one or more nodes in NAN can elect one or more based on master control preference number (MPN) be dynamically determined or preset A main controlled node.For example, can access the node of external power source can set its MPN to higher (for example, 10), and lean on battery function The node of rate running can set its MPN to lower (for example, 5).During election process, the node with higher MPN can be with More likely it is elected as main controlled node.
In some cases, main controlled node election process can lead to the unfairness between each node.For example, main controlled node may More power and/or processor resource are consumed than non-main controlled node.In some implementations, main controlled node becomes based on " locking " Node is controlled, and seldom has an opportunity or has no chance the responsibility for transmitting synchronization message passing to other nodes.In addition, in NAN One or more nodes may not support main controlled node election process.In some embodiments, main controlled node is not supported to elect Its MPN can be set as predetermined value or minimum value by the node of journey.Correspondingly, using inclusive, MPN compatibility synchronous driving process It may be beneficial for some nodes.
Figure 1A illustrates the example of wireless communication system 100.Wireless communication system 100 can be according to wireless standard (such as 802.11 standard) it operates.Wireless communication system 100 may include the AP 104 communicated with STA.In some respects, it wirelessly communicates System 100 may include more than one AP.In addition, STA can be communicated with other STA.As an example, the first STA 106a can be with second STA 106b communication.As another example, the first STA 106a can be communicated with the 3rd STA 106c, although not explaining in Figure 1A This communication link.
Various processes and method can be used in wireless communication system 100 between AP 104 and STA and in individual Transmission between STA (such as the first STA 106a) and another individual STA (such as the 2nd STA 106b).For example, can basis OFDM/OFDMA technology sends and receives signal.If this is the case, then wireless communication system 100 can be referred to as OFDM/OFDMA system.It alternatively, can be according to CDMA technology between AP 104 and STA and in individual STA (such as first STA 106a) and another individual STA (such as the 2nd STA 106b) between send and receive signal.If this is the case, then Wireless communication system 100 is referred to alternatively as cdma system.
Communication link can be established between each STA.Some possible communication links between each STA are illustrated in Figure 1A. As an example, communication link 112 can facilitate the transmission from the first STA 106a to the 2nd STA 106b.Another communication link 114 The transmission from the 2nd STA 106b to the first STA 106a can be facilitated.
AP 104 may act as base station and provide the wireless communication coverage in basic service area (BSA) 102.AP 104 together with Basic service set (BSS) is referred to alternatively as together with all STA that the AP 104 is associated and communicates using the AP 104.
It should be noted that wireless communication system 100 can not have center AP 104, and may function as between all STA Peer-to-peer network.Correspondingly, the function of AP 104 described herein is alternatively executed by one or more STA.
Figure 1B illustrates the example that may act as the wireless communication system 160 of peer-to-peer network.For example, the wireless communication in Figure 1B System 160 shows the STA 106a -106i that can be communicated with one another in the case where AP is not present.In this way, STA 106a -106i can It is configured to communicate the transmission and reception with co-ordination message in different method, to prevent from interfering and realizing various tasks.? On one side, network shown in Figure 1B can be configured to " neighborhood aware network " (NAN).In one aspect, NAN can refer to Network for being communicated between each STA for being oriented to be closely adjacent to each other.In some cases, the STA operated in NAN can be with Belong to different network structures (for example, each STA in different houses or building, which is used as, has the connection of different external networks Independent LAN a part).
In some respects, the communication protocol for communicating between all nodes on ad hoc communications network 160 can dispatch The period of communication between all network nodes can occur for period.These periods communicated between STA 106a -106i It can be referred to availability window.Availability window may include discovery section or paging section discussed further below.
Agreement can also define the other times section not communicated between each node of network.In some embodiments, When peer-to-peer network 160 is not in availability window, node can enter one or more dormant states.Alternatively, some In embodiment, when peer-to-peer network is not in availability window, each section for the 106a -106i that stands can enter dormant state.Example Such as, some stations may include the networking hardware for entering dormant state when peer-to-peer network is not in availability window, and in the STA Including other hardware (for example, processor, electronic console, or the like etc.) in the peer-to-peer network not in availability window When do not enter dormant state.
It is root node that ad hoc communications network 160, which can assign a node, or can assign one or more nodes is master control Node.In fig. ib, the root node assigned is illustrated as STA 106e.In peer-to-peer network 160, root node is responsible for periodically Synchronization signal is transmitted to other nodes in the peer-to-peer network.The synchronization signal transmitted by root node 160e can provide timing and join Examine the availability window communicated between each node during coordinating for other nodes 106a-d and 106f-i.For example, synchronous Message 172a -172d can be transmitted by root node 106e and be received by node 106b -106c and 106f -106g.Synchronization message 172 can provide the timing source for STA 106b-c and 106f -106g.Synchronization message 172 can also be provided in the future The update of the scheduling of availability window.Synchronization message 172 can also be used to notify STA 106b -106c and 106f -106g they It is still in peer-to-peer network 160.
Some nodes in ad hoc communications network 160 can serve as branch's synchronization node.Branch's synchronization node can retransmit The availability window scheduling received from root node and master clock both information.In some embodiments, it is transmitted by root node Synchronization message may include availability window scheduling and master clock information.In these embodiments, synchronization message can be by Branch's synchronization node retransmits.In fig. ib, the STA for serving as the synchronization node of the branch in ad hoc communications network 160 is shown 106b -106c and 106f -106g.STA 106b -106c and 106f -106g receives synchronization message 172a-from root node 106e The synchronization message is simultaneously retransmitted the synchronization message 174a -174d to retransmit by 172d.By retransmitting the synchronization from root node 106e Message 172, branch synchronization node 106b -106c and 106f -106g with extended range and can improve the steady of peer-to-peer network 160 Property.
Synchronization message 174a-the 174d of re-transmission is received by node 106a, 106d, 106h and 106i.These nodes can be by It is characterized as " leaf " node, because these nodes will not retransmit them from root node 106e or branch synchronization node 106b -106c Or the received synchronization message of 106f -106g.In some embodiments, multiple nodes can negotiate the transmission of synchronization signal, such as originally What text discussed in more detail.
Synchronization message or synchronization frame can be transmitted periodically.However, the cyclical transmission of synchronization message to node 106 and Speech may be problematic.These problems may be because node 106 must repeatedly revive from dormant state periodically to pass Send and/or receive synchronization message and caused by.If node 106 can rest on dormant state more long with save power without It is revived from dormant state synchronization message is transmitted and/or received on network and will be then advantageous.
When new wireless device enters the position with NAN, which can scan each wave band before NAN is added To find discovery and synchronizing information.It will be advantageous if it is that STA can be accessed quickly that information necessary to NAN, which is added, in STA 's.
Largely need not in addition, being transmitted and/or discovery message synchronous with re-transmission from the node 106 in NAN and can be introduced to network The expense wanted.
Fig. 2 illustrates various groups for can utilizing in adoptable wireless device 202 in wireless communication system 100 or 160 Part.Wireless device 202 is the example that can be configured to realize the equipment of various methods described herein.For example, wireless device 202 It may include a STA in AP 104 or each STA.
Wireless device 202 may include the processor 204 for controlling the operation of wireless device 202.Processor 204 is also referred to as Central processing unit (CPU).The memory 206 that may include both read-only memory (ROM) and random access memory (RAM) can To provide instruction and data to processor 204.A part of memory 206 may also include nonvolatile RAM (NVRAM).Processor 204 is typically based on the program instruction of storage in memory 206 to execute logic and arithmetical operation.Memory Instruction in 206 can be executable to realize method described herein.
Processor 204 may include the processing system realized with one or more processors or can be its component.This A or multiple processors can use general purpose microprocessor, microcontroller, digital signal processor (DSP), field-programmable gate array Column (FPGA), programmable logic device (PLD), controller, state machine, gate logic, discrete hardware components, specialized hardware are limited State machine can execute any combination of calculation or other any other suitable entities manipulated to information to realize.
Processing system may also include the machine readable media for storing software.Software should be broadly interpreted to mean Any kind of instruction, no matter its be referred to as software, firmware, middleware, microcode, hardware description language or other.Instruction It may include code (for example, in source code format, binary code form, executable code format or any other suitable generation Code format).These instructions make processing system execute various functions described herein when being executed by the one or more processors.
Wireless device 202 may also include shell 208, which may include transmitter 210 and/or receiver 212 to allow The transmission and reception of data are carried out between wireless device 202 and remote location.Transmitter 210 and receiver 212 can be combined At transceiver 214.Antenna 216 can be affixed to shell 208 and be electrically coupled to transceiver 214.Wireless device 202 may also include The multiple transmitters of (not shown), multiple receivers, multiple transceivers, and/or mutiple antennas.
Transmitter 210 can be configured to wirelessly transmit the grouping with different grouping type or function.For example, transmitter 210 can be configured to transmit the different types of grouping generated by processor 204.When wireless device 202 is implemented as or is used as When AP 104 or STA 106, processor 204 can be configured to handle the grouping of a variety of different grouping types.For example, processor 204 It may be configured to determine that packet type and correspondingly handle the grouping and/or the field of the grouping.When wireless device 202 is by reality When being now or be used as AP 104, processor 204 may be additionally configured to select and generate one of multiple packet types.For example, Processor 204 can be configured to generate the discovery grouping for including discovery message and which kind of class determination will use in particular instances The grouping information of type.
Receiver 212 can be configured to wirelessly receive the grouping with different grouping type.In some respects, receiver 212 can be configured to detect the used type being grouped and correspondingly handle the grouping.
Wireless device 202 may also include the letter that can be used for trying hard to detecting and quantifying the signal level received by transceiver 214 Number detector 218.Signal detector 218 can detect such as gross energy, per code element energy of per subcarrier, power spectral density etc Signal and other signals.Wireless device 202 may also include the digital signal processor (DSP) for handling signal.DSP can quilt It is configured to generate grouping for transmission.In some respects, grouping may include physical layer data units (PPDU).
In some respects, wireless device 202 can further comprise user interface 222.User interface 222 may include key Plate, microphone, loudspeaker, and/or display.User interface 222 may include to the user of wireless device 202 convey information and/or Any element or assembly of input is received from the user.
The various assemblies of wireless device 202 can be coupled by bus system 226.Bus system 226 may include for example Data/address bus, and there are also power bus, control signal bus and status signal bus in addition other than data/address bus.Wirelessly set Standby 202 component can be used other certain mechanism and be coupled or receive or provide input each other.
Although illustrating several separated components in Fig. 2, one or more components in these components can be combined or Person jointly realizes.For example, processor 204 can be used for not only realizing the functionality described above with respect to processor 204, but also Also realize the functionality described above with respect to signal detector 218 and/or DSP.In addition, each component explained in Fig. 2 can make It is realized with multiple separate element.
Equipment (STA 106a -106i shown in such as Figure 1B) for example can be used for neighborhood know networking (or i.e. NAN connection Net).For example, each station in network can be supported on the basis of device-to-device (for example, peer-to-peer communications) for each station Application communicate with one another.Discovery agreement can be used to enable each STA to declare their own (for example, passing through hair in NAN Discovery is sent to be grouped) and the service (for example, by sending paging or inquiry packets) provided by other STA is provided, ensure simultaneously Secure communication and low-power consumption.
Know in (or i.e. NAN) in neighborhood, the equipment (such as STA or wireless device 202) in the network can be by It is appointed as root device or root node.In some embodiments, root device can be as the other equipment in the network Conventional equipment, rather than special equipment, such as router.In NAN, root node can be responsible for other nodes into the network Periodically transmit synchronization message or synchronization signal or frame.Timing reference can be provided by the synchronization message that root node transmits For the availability window communicated between all nodes during other nodes coordinatings.Synchronization message can also be provided to for inciting somebody to action Carry out the update of the scheduling of availability window.Synchronization message can also be used to notify all STA that they are still in the peer-to-peer network.
In neighborhood aware network (NAN), the STA on network, which can be used, to be transmitted by root STA and is retransmitted by branch STA Synchronization message is to determine availability window.During these availability windows, the STA in NAN be can be configured to to/from the network On other STA transmission and/or receive message.The part in STA or STA on other times, NAN may be at suspend mode shape State.For example, the STA (such as wireless device 202) on NAN can be based at least partially on the synchronization message received from root node and Into dormant state.In some embodiments, the STA on NAN can enter suspend mode, wherein the one or more of the STA Element can enter suspend mode, rather than entire STA enters suspend mode.For example, STA 202 can enter suspend mode, Middle transmitter 210, receiver 212, and/or transceiver 214 can enter suspend mode based on the synchronization message received on NAN Mode.The suspend mode can enable STA 202 to save power or battery life.
Fig. 3 illustrates the example that the NAN 320 of all aspects of this disclosure wherein can be used.The master control STA 300 of network to Each node provides synchronizing information.By this method, master control STA 300 is configured to and the STA transmission and reception message on NAN 320 310,311,312 and 314.
STA 300,302 and 304 can be the node on NAN 320.As the node on NAN 320, STA 300,302 With 304 can other STA on network 320 transmit message 312 and 314.These message can be passed during availability window Other STA are given, each STA is configured to pass to/from other STA on network 320 during the time of the availability window Send and/or receive transmission.For example, STA 302 can during for the availability window of both STA 302 and STA 304 to STA 304 transmits message 312, and wherein the availability window is based in part on the synchronization message received from root STA.
Because the STA on NAN 320 is wireless and has limited quantity of power between each charging, if STA not repeatedly revives the synchronization message between STA periodically to transmit and/or receive NAN 320 then from dormant state It is advantageous.Thus, if STA 300,302 and 304 can rest on dormant state more long to save power without from not The revival of dormancy state will be then advantageous so that synchronization message is transmitted and/or received on network.
Master control STA 300 can periodically transmit synchronization message in NAN 320.In some embodiments, synchronization message It can indicate the frequency of the availability window for each STA in network 320, and can further indicate that the frequency of synchronization message It spends and/or up to the interval of next synchronization message.By this method, master control STA 300 provides synchronous and a certain discovery to network 320 It is functional.Because master control STA may not enter suspend mode or than the less suspend mode of other nodes, master control STA can be only The state of STA 302 and 304 is stood on to coordinate the discovery and timing of NAN 320.By this method, STA 302 and 304 is dependent on master STA 300 is controlled to reach this functionality and can rest on more long in dormant state to save power.
Fig. 4 explains the exemplary discovery window structure for STA discovery NAN 320 of exemplary realization according to the present invention. The exemplary total discovery period (DP) 406 for finding window structure 400 and may include the discovery window (DW) 402 lasted and lasting 408 Section.In some respects, communication can also occur via other channels.Time horizontally increases across the page on a timeline.
During DW 402, STA can declare to service by broadcast message (such as discovery is grouped or discovery frame).STA can Monitor the broadcast message transmitted by other STA.In some respects, lasting for DW can change over time.In other respects, DW is gone through When can be kept fixed over a period.As explained in Fig. 4, the end of DW 402 can separately be reached with the beginning of subsequent DW First remaining time section.
As explained in Fig. 4, beginning from the beginning of a DW to subsequent DW can be measured by lasting 408 total section Period.In some embodiments, it lasts 408 and is referred to alternatively as discovery period (DP).In some respects, lasting for total section can be with Time change.In other respects, lasting for total section can keep constant over a period.It is complete in the total section for lasting 408 At knot, another total section can start, including DW and remaining section.A sequence of total section can ad infinitum come one after the other or after Continue up to a fixed time period.When STA not transmit or monitor or not expection to transmit or monitor when, STA can enter suspend mode or Power saving mode.
It was found that inquiry is transmitted during DW 402.STA is to the response of the discovery inquiry transmitted in DP 406 period quilt Transmission.As explained below, the time for transmit the response inquired the detection that is transmitted or discovery distributed can be with Such as the time phase for being used to transmit discovery inquiry for overlapping and being distributed with the time for being used to transmit discovery inquiry distributed It is adjacent or be distributed for transmit the time that discovery is inquired terminate after a certain period.
Transmission then revives to receive beacon to the STA of the request of NAN 320.In suspend mode or power saving mode In STA normal operating or full-power mode can be revived or return at the beginning of beacon 410 to enable and be carried out by the STA It monitors.In some respects, when STA expection will be communicated with another equipment, or as the notice for receiving instruction STA revival Normal operating or the full-power mode as a result, the STA can revive or be returned in other times of grouping.STA can revive ahead of time with true It protects the STA and receives beacon 410.The beacon includes information element described below, it at least identifies the probe requests thereby work to STA The NAN 320 responded out.
The beginning and end of DW 402 can be known via a variety of methods by every STA that expectation transmits detection or discovery inquiry Dawn.In some respects, every STA can wait beacon.Beacon can specify the beginning and end of DW 402.
Fig. 5 A shows the exemplary structure of media access control (MAC) frame 500.In some respects, media access control (MAC) frame (MAC) 500 can be used for beacon 410 discussed above, and beacon 410 is referred to alternatively as sync beacon in some embodiments.Such as figure Shown, mac frame 500 includes 11 different fields: frame control (FC) field 502 lasts/identifies (dur) field 504, receiver Address (A1) field 506, transmitter address (A2) field 508, (it can refer to destination-address (A3) field 510 in some respects Show NAN BSSID), sequence control (sc) field 512, timestamp field 514, beacon interval field 516, capable field 518, packet Include the information element 520 and Frame Check Sequence (FCS) field 522 of window information.In some respects, field 502-522 includes MAC header.Each field may include one or more subfields or field.For example, the frame control word of media access control (MAC) frame 500 Section 502 may include multiple subfields, such as protocol version, type field, sub-type field and other fields.This field Those of ordinary skill will be appreciated that, the attribute of frame 500 may include added field, and each field can be rearranged, remove and/ Or reset size.For example, in various embodiments, frame 500 can be configured to sync beacon, discovery beacon or scanning letter Mark, and/or multicast or unicast find frame.Correspondingly, in some embodiments, timestamp field 514, beacon interval field 516, One or more of capable field 518 and window information field 520 can be omitted or replaced by other payload fields.
In some respects, NAN BSSID field 510 can indicate NAN device clusters.In another embodiment, each NAN can With different (for example, pseudorandom) NAN BSSID 510.In one embodiment, NAN BSSID 510 can be based on service Using.For example, the NAN created using A can have the BSSID 510 of the identifier based on application A.In some embodiments, NAN BSSID 510 can be defined by standard body.In some embodiments, NAN BSSID 510 can be based on other contexts Information and/or device characteristics, for example device location, ID of server assignment, etc..In one example, NAN BSSID 510 may include the latitude of NAN and the hash of longitude station.Shown in NAN BSSID field 510 be 6 eight-bit group It is long.In some implementations, NAN BSSID field 510 can be long for 4,5 or 8 eight-bit group.In some embodiments, AP 104 can indicate NAN BSSID 510 in information element.
In various embodiments, frame 500 or another discovery frame may include MPN.In one embodiment, fc field 502 can wrap Include MPN.In one embodiment, A2 field 508 may include MPN.In the various examples, entire A2 field 508 may include MPN, one A or multiple most significant bits (MSB) or least significant bit (LSB) can be replaced, etc. by MPN.In one embodiment, NAN- BSSID field 510 may include MPN.In the various examples, entire NAN-BSSID field 510 may include MPN, and one or more is most High significance bit (MSB) or least significant bit (LSB) can be replaced, etc. by MPN.In one embodiment, capable field 518 may include MPN.In one embodiment, one or more information elements (IE) 520 may include MPN, such as attribute.In an example In, the IE 600 referring to Fig. 6 description may include MPN, but other IE may also comprise MPN.In various implementations described herein In example, the field including MPN alternatively includes instruction or expression rather than MPN itself of MPN.
In various embodiments, frame 500 or another discovery frame may include NAN identifier.Such as described hereinafter with reference to Fig. 5 B , NAN identifier can in various embodiments include it is following one or more: about for NAN functionality send frame 500 Identifier, device cluster set identifier, one or more NAN cluster parameter, the discovery window indicator, discovery of (such as NAN frame) Period indicator, discovery channel indicator, the MPN of transmission equipment, device capability information, window information 520, NAN BSSID, group Collect size instruction or estimation, clock accuracy instruction, clock type instruction (for example, GPS) and it is described herein it is any its His field or indicator.In one embodiment, receiver address (A1) field 506 may include NAN identifier.In a reality It applies in example, destination-address (A3) field 510 may include NAN identifier.In one embodiment, NAN information element (IE) (such as referring to the NAN IE 600 and 650 of Fig. 6 A-6B description) may include NAN identifier.
In one embodiment, frame 500 can be configured to beacon frame.For example, frame 500 can be during DW 402 (Fig. 4) It sends with the synchronization for the equipment in same cluster identifier.In one embodiment, A1 field 506 may include cluster identifier Symbol, A2 field 508 may include source address, and A3 field 510 may include indicating that the frame is the value of NAN frame.Implement one In example, A1 field 506 may include indicating that the frame is the value of NAN frame, and A2 field 508 may include source address, and A3 field 510 may include cluster identifier symbol.With the position that multicasts being set when cluster identifier symbol can be for example in A1 field 506.Group Set identifier may include the uniqueness for being for example attached to NAN OUI or semi-unique property clustering index, as referring to Fig. 5 B institute Description.The clustering index can be, for example, two bytes.Indicate that the frame be the value of NAN frame may include being attached to NAN OUI Wildcard clustering index (such as generally indicating the functional predetermined clustering index of NAN), as referring to described in Fig. 5 B.It should Wildcard clustering index can be, for example, two bytes.In various embodiments, the wildcard clustering index can be, for example, 0x00 or Person 0xFF.
In another embodiment, frame 500 can be configured to discovery beacon or scanning for beacon.In one embodiment, A1 field 506 may include cluster identifier symbol, and A2 field 508 may include source address, and A3 field 510 may include indicating that the frame is The value of NAN frame.In another embodiment, A1 field 506 may include indicating that the frame is the value of NAN frame, and A2 field 508 can wrap Source address is included, and A3 field 510 may include cluster identifier symbol.Cluster identifier symbol has when can be for example in A1 field 506 There is the position that multicasts being set.Cluster identifier symbol may include the uniqueness for being for example attached to NAN OUI or semi-unique property cluster rope Draw, as referring to described in Fig. 5 B.The clustering index can be, for example, two bytes.Indicate that the frame is that the value of NAN frame can It is such as following to include the wildcard clustering index (such as generally indicating the functional predetermined clustering index of NAN) for being attached to NAN OUI Referring to described in Fig. 5 B.The wildcard clustering index can be, for example, two bytes.In various embodiments, the wildcard cluster rope Drawing can be, for example, 0x00 or 0xFF.
In another embodiment, frame 500 can be configured to multicast discovery frame.For example, frame 500 can be including one or more The discovery common action frame of a service descriptor.In one embodiment, A1 field 506 may include cluster identifier symbol, A2 field 508 may include source address, and A3 field 510 may include indicating that the frame is the value of NAN frame.In one embodiment, A1 word Section 506 may include indicating that the frame is the value of NAN frame, and A2 field 508 may include source address, and A3 field 510 can wrap Include cluster identifier symbol.With the position that multicasts being set when cluster identifier symbol can be for example in A1 field 506.Cluster identifier symbol can To include the uniqueness for being for example attached to NAN OUI or semi-unique property clustering index, as referring to described in Fig. 5 B.The group Collection index can be, for example, two bytes.Indicate that the frame be the value of NAN frame may include the wildcard cluster rope for being attached to NAN OUI Draw and (such as generally indicate the functional predetermined clustering index of NAN), as referring to described in Fig. 5 B.The wildcard clustering index It can be, for example, two bytes.In various embodiments, which can be, for example, 0x00 or 0xFF.
In another embodiment, frame 500 can be configured to unicast discovery frame.For example, frame 500 can be including one or more The discovery common action frame of a service descriptor.In one embodiment, A1 field 506 may include destination-address, A2 field 508 may include source address, and A3 field 510 may include cluster identifier.In another embodiment, A1 field 506 can be with Including destination-address, A2 field 508 may include source address, and A3 field 510 may include indicating that the frame is NAN frame Value.Cluster identifier symbol can have the unicast position (or the position that multicasts of non-set) being set.Cluster identifier symbol may include for example Be attached to NAN OUI uniqueness or semi-unique property clustering index, as referring to described in Fig. 5 B.The clustering index can be with For example, two bytes.Indicate that the frame be the value of NAN frame may include the wildcard clustering index (such as one for being attached to NAN OUI As indicate the functional predetermined clustering index of NAN), as referring to described in Fig. 5 B.The wildcard clustering index can be such as For two bytes.In various embodiments, which can be, for example, 0x00 or 0xFF.
Fig. 5 B shows the exemplary NAN identifier 550 that can be used in the NAN 320 of Fig. 3.As shown, NAN is identified Symbol 550 includes the first to the 6th eight-bit group 551-556.In some embodiments, eight-bit group 551-556 is divided into group Knit unique identification (OUI) 560 and the identifier 565 different because of network interface controller (NIC).First eight-bit group 551 It may further include the address mark 575 of multicast mark 570 and local management.Those of ordinary skill in the art will be appreciated that, NAN The attribute of identifier 550 may include added field, and each field can be rearranged, remove, and/or reset size.
In the embodiment explained, NAN identifier 550 is formatted as the address IEEE 802MAC.For example, NAN is identified Symbol 550 includes OUI identifier 560.In some embodiments, OUI 560 may include the identifier for indicating NAN network.For example, One or more OUI 560 can be assigned to NAN network by standards body (such as IEEE).In some embodiments, one or Multiple predefined OUI 560 can be stored in device memory (such as memory 206 (Fig. 2)).Correspondingly, some In embodiment, NAN equipment 202 (Fig. 2) can globally identify NAN network.In some embodiments, by 550 lattice of NAN identifier Formula, which turns to MAC Address, can increase legacy compatibility.In some embodiments, NAN identifier 550 can have another format.
As discussed above, in some embodiments, one or more OUI 560 can indicate NAN network frame.One In a little embodiments, one in the one or more OUI 560 and the 4th to the 6th eight-bit group 554-556 different because of NAN or Multiple additional bits different because of NAN can indicate NAN network frame with being combined.In some embodiments, the the 4th to the 6th The additional bit different because of NAN of one or more of eight-bit group 554-556 can indicate specific NAN network.One In a little embodiments, one or more bits in the 4th to the 6th eight-bit group 554-556 may include it is one or more other NAN indicator, for example device cluster set identifier, one or more NAN cluster parameter, discovery window indicator, hair Current section indicator, discovery channel indicator, the MPN of transmission equipment, device capability information, window information 520, NAN BSSID, Cluster size instruction or estimation, clock accuracy indicate, clock type instruction is (for example, GPS) and described herein any Other fields or indicator.
For example, in one embodiment, the 6th eight-bit group 556 can indicate specific NAN.In one embodiment, special Fixed NAN value (for example, 0xFF) can indicate should always processed wildcard NAN (for example, when NAN is not yet added in new equipment When network).In some embodiments, the 4th to the 6th eight-bit group 554-556 can indicate specific NAN.In some implementations In example, the 4th to the 6th eight-bit group 554-556 can generally indicate NAN frame, and specific NAN can be included in frame In subsequent field in 500 (Fig. 5) or it is included in such as IE 520.
In some embodiments, such as when A1 field 506 (Fig. 5 A) includes NAN identifier 550, multicast mark can be made 570 (or the mark that multicasts) set.It in some embodiments, can such as when A3 field 510 (Fig. 5 A) includes NAN identifier 550 So that multicast mark 570 is cancelled set (or making unicast flag set).
In some embodiments, one or more bits in the 4th to the 6th eight-bit group 554-556 can indicate NAN Equipment cluster.In some embodiments, one or more bits in the 4th to the 6th eight-bit group 554-556 can be based on clothes Business application.For example, may include the mark based on application A in the 4th to the 6th eight-bit group 554-556 using the NAN that A is created Know one or more bits of symbol.For example, the 4th to the 5th eight-bit group 554-555 may include the hash of application identifier. In some embodiments, one or more bits of the 4th to the 6th eight-bit group 554-556 can be believed based on other contexts Breath and/or device characteristics, for example device location, ID of server assignment etc..In one example, the six or eight position Group 556 may include the latitude of NAN and the hash of longitude station.
Fig. 6 A shows the Exemplary attributes of the NAN information element (IE) 600 in the NAN 320 that can be used in Fig. 3.Various In embodiment, any equipment described herein or another compatible equipment can transmit 600 (for example, AP of NAN IE 104 (Fig. 3)) attribute.One or more message in wireless NAN 320 may include the attribute of NAN IE 600, such as illustrate For beacon 410.In some respects, NAN information element 600 can be included in the field 520 of mac frame 500, as described above.
As shown in Figure 6A, the attribute of NAN IE 600 includes Property ID 602, length field 604, next discovery inquiry window The timestamp field 606 of mouth (DQW), the timestamp field 608 of next discovery query window (DRW), discovery query window (DQW) Duration field 610, discovery response window (DRW) duration field 612, DQW period field 614, DRW period field 616, beacon window Mouth field 618 and transfer address field 620.Those of ordinary skill in the art will be appreciated that the attribute of NAN IE 600 may include Added field, and each field can be rearranged, remove, and/or reset size.
Shown property identifier field 602 is that 1 eight-bit group is long.In some implementations, property identifier field 602 to can be 2,5 or 12 eight-bit group long.In some implementations, property identifier field 602 can have variable length Degree, such as length by signal change and/or the length changed between all ISPs.Property identifier field 602 can Including the value by the component identification for the attribute of NAN IE 600.
Length field 604 may be used to indicate that the length of the attribute of NAN IE 600 or the total length of all subsequent fields.Figure Length field 604 shown in 6A is that 2 eight-bit group are long.In some implementations, length field 604 can be 1,5 or 12 eight-bit group are long.In some implementations, length field 604 can have a variable-length, such as by the length of Fluctuation of analytical signal and/ Or the length changed between all ISPs.
Next DQW timestamp field 606 can indicate at the beginning of next discovery query window (for example, above with respect to Fig. 4 The beginning of next discovery period 406 of description).In various embodiments, which can be used absolute timestamp or opposite Timestamp indicates.Next DQR timestamp field 608 can indicate at the beginning of next discovery inquiry response (for example, with ShiShimonoseki In next discovery inquiry response period that Fig. 7-9 is described).In various embodiments, which can be used absolute Timestamp or relative time stamp are to indicate.
DQW duration field 610 can indicate that DQW's lasts (for example, lasting below in relation to Fig. 7-9 DQW described).Each In embodiment, DQW duration field 610 can indicate the lasting (in terms of ms, μ s, chronomere (TU) or another unit) of DQW.? In some embodiments, chronomere can be 1024 μ s.Shown in DQW duration field 610 be 2 eight-bit group it is long.Some In realization, it is long that DQW duration field 610 can be 4,6 or 8 eight-bit group.
DRW duration field 612 can indicate that DRW's lasts (for example, lasting below in relation to Fig. 7-9 DRW described).Each In embodiment, DRW duration field 612 can indicate the lasting (in terms of ms, μ s, chronomere (TU) or another unit) of DRW.? In some embodiments, chronomere can be 1024 μ s.Shown in DRW duration field 612 be 2 eight-bit group it is long.Some In realization, it is long that DRW duration field 612 can be 4,6 or 8 eight-bit group.
In some embodiments, DQW period field 614 can indicate the length (describing below in relation to Fig. 7-9) of DQW.Each In embodiment, DQW period field 614 can indicate the length of DQW (in terms of ms, μ s, chronomere (TU) or another unit).? In some embodiments, chronomere can be 1024 μ s.The length of shown DQW period field 614 is in 2 eight-bit group and 8 Between eight-bit group.In some implementations, DQW period field 614 can be long for 2,4,6 or 8 eight-bit group.
In some embodiments, DRW period field 616 can indicate the length (describing below with reference to Fig. 7-9) of DRW.Each In embodiment, DRW period field 616 can indicate the length of DRW (in terms of ms, μ s, chronomere (TU) or another unit).? In some embodiments, chronomere can be 1024 μ s.The length of shown DRW period field 616 is in 2 eight-bit group and 8 Between eight-bit group.In some implementations, it is long to can be 2,4,6 or 8 eight-bit group for DRW period field 616.
Beacon duration field 618 can indicate the lasting of beacon window (for example, the beacon window described below in relation to Fig. 7-9 Last).In various embodiments, beacon duration field 618 can indicate the lasting (with ms, μ s, chronomere of beacon window (TU) or another unit meter).In some embodiments, chronomere can be 1024 μ s.Shown beacon window field 618 Length is between 2 eight-bit group and 8 eight-bit group.In some implementations, beacon window field 618 can be 4,6 Or 8 eight-bit group are long.
The network address of the node of the instruction transmission of transfer address field 620 NAN IE 600.In some respects, above by reference to The A3 field 510 for the mac frame 500 that Fig. 5 A is discussed can be configured to NAN BSSID and/or NAN identifier.Therefore, NAN IE 600 can provide transmitter address field 620 so that receiver can determine the network address of transmitter.In some embodiments In, it can be configured to NAN BSSID and/or NAN identifier above by reference to Fig. 5 A A1 field 506 discussed.Therefore, NAN IE 600 can provide receiver address field 620 so that receiver can determine the network address of intended receivers.In some realities It applies in example, NAN IE 600 may further include NAN BSSID and/or NAN identifier.
Fig. 6 B shows the another exemplary attribute of the NAN information element (IE) 650 in the NAN 320 that can be used in Fig. 3.? In various embodiments, any equipment described herein or another compatible equipment can transmit NAN IE 650 (such as illustrate and Speech, AP 104 (Fig. 3)) attribute.One or more message in wireless NAN 320 may include the attribute of NAN IE 650, all Such as example beacon 410.In some respects, NAN information element 650 can be included in the field 520 of mac frame 500, as above It is described.
NAN information element 650 is different from NAN information element 600 in the following areas: relative to NAN information element 600, Discovery query window timestamp and discovery inquiry response window time stamp are removed from NAN information element 650.In some respects, The receiver of NAN information element 650 can will be seen that the query window time started is determined as being synchronized to the local of NAN clock reference Clock reference is divided equally time when (period=0 clock mod DQW of standing) by DQW period field 600.Similarly, in some respects, It was found that the response window time started can when equal by DRW period field 662 based on the local clock for being synchronized to NAN clock reference (period=0 clock mod DRW of standing) is divided to determine.Note that determining discovery query window or finding the response window time started These exemplary methods, which are similar to the method for being used to determine the beacon window time started, can be found to be station in certain aspects Beacon interval=0 clock mod.
Fig. 7 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.The part 701 of timeline 702 is expanded as underlying time line 703.Timeline 702 shows a series of beacon signals 705.Exhibition Discovery window 710 and discovery inquiry response window 715 are shown on the timeline 703 opened.The timeline 703 of expansion is also shown One or more beacon window 720a-b can occur within the discovery period.In one embodiment, synchronization frame can be in beacon window Period is transmitted.In some embodiments, synchronization frame can be at the specific objective beacon transmission times (TBTT) in beacon window It is transmitted.In the embodiment explained, discovery query window 710 is completely in discovery inquiry response window 715.
Fig. 8 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.The part 801 of timeline 802 is expanded as underlying time line 803.Timeline 802 shows a series of beacon signals 805.Exhibition Discovery window 810 and discovery inquiry response window 815 are shown on the timeline 803 opened.The timeline 803 of expansion is also shown One or more beacon window 820a-b can occur within the discovery period.In the embodiment that Fig. 8 is explained, discovery inquiry window Mouth 810 is not overlapping with discovery inquiry response window 815.It replaces, discovery inquiry response window 815, which follows closely, inquires window in discovery After the end of mouth 810.
Fig. 9 is the timing of the one embodiment for explaining beacon window, discovery query window and finding inquiry response window Figure.A part of timeline 902 is expanded as underlying time line 903.Timeline 902 shows a series of beacon signals 905.Expansion Timeline 903 on show discovery window 910 and discovery inquiry response window 915.The timeline 903 of expansion also shows one A or multiple beacon windows 920 can occur within the discovery period.In the embodiment that Fig. 9 is explained, query window 910 is found Timing with discovery the timing of inquiry response window 915 it is unrelated.
Some aspects described herein be related to equipment for the clock signal of synchronous each STA operate by Peer with Method.On the one hand, at least some of each STA can transmit the current time value of its clock signal to other STA.For example, root According to some embodiments, each STA can periodically transmit " synchronization " frame for carrying timestamp.The current time value can correspond to the time Timestamp value.For example, in one embodiment, it is as described above to find that message can be used as " synchronizing " frame and carry working as STA 106 Preceding time value.Other than timestamp, synchronization frame may also include about discovery section and find the information of period.For example, synchronous Frame may include the scheduling for finding section and finding the period.It may be new STA for the network when receiving synchronization frame 106 can determine time and discovery section/discovery period scheduling in the network.It can be protected in each STA of the intra network communication Synchronization is held, and overcomes clock drift as described below simultaneously.Based on the synchronization message, each STA can enter and exit network (example Such as, NAN) it is synchronized without losing.In addition, synchronization message described herein allows to avoid power in excess from consuming and in the network Each STA can share the burden for synchronous information receiving and transmitting.Moreover, the low messaging overhead of some embodiments permission (for example, because Synchronization frame can be transmitted to only have several equipment in each discovery period, as will be described below).Such as described above with reference to Fig. 4 , for example, the discovery grouping in NAN is transmitted during the discovery section 402 that each discovery period 406 occurs. In this way, synchronization message can be sent during discovery section 402 for certain discovery periods.
It may include message 1000 for synchronous time value that Figure 10, which is illustrated,.As described above, in some embodiments, disappearing Breath 1000 can correspond to discovery message.Message 1000 may include discovery packet header 1008.The message can further comprise (1010) for synchronous time value 1010.In some embodiments, discovery packet header 1008 may include time value 1010.It should Time value can correspond to the current time value of the clock signal of the STA 106 of transmission message 1000.In addition, message 1000 may include Can accuracy with the time value or its how can be used for synchronous related time value information 1011.In one embodiment, when Between value information 1011 may include STA 106 MPN.Message 1000 can further comprise discovery packet data 1012.Although Figure 10 It shows discovery message and is used as synchronization message, however will be appreciated that, according to other embodiments, synchronization message can be with discovery message point Exploitation is sent.In addition, those of ordinary skill in the art will be appreciated that, various fields described herein can be rearranged, reset Size, some fields can be omitted, and can add added field.
It will be appreciated that STA 106, which can not be each discovery section, transmits synchronization frame.But it is as described further below , probability value (P_sync) can be used to determine whether STA 106 transmits and/or prepare synchronization frame.In this way, although in some realities It applies for at least some synchronization frames of each discovery section transmission in example, however in certain embodiments, and the institute of the non-participating NAN There is STA to be directed to each discovery section transmission synchronization frame.Probability frame prepares and/or transmission is allowed when transmitting synchronization frame Power consumption is reduced, and still realizes synchronize simultaneously.
Figure 11 shows the transmission according to an embodiment and receives the flow chart 1100 of the method for synchronization frame.This method can be complete Portion or partly as equipment described herein (STA shown in all wireless devices 202 as shown in Figure 2 or Figure 1A -1B Any STA in 106a -106i) it realizes.It is begged for although the method explained is herein defined as reference above with respect to Figure 1A -1B The wireless communication system 100 and 160 of opinion and the wireless device 202 discussed above with respect to Fig. 2 describe, but this field Those of ordinary skill will be appreciated that the method explained can be by another equipment described herein or any other suitable equipment To realize.Although the method explained is described herein referring to certain order, in various embodiments, this paper's is each Frame can be executed or be omitted in different order, and can add supplementary frame.
In one aspect, in frame 1101, equipment 202 determines whether to prepare synchronization frame using probability value P_sync for needle To the transmission of discovery section.In other words, equipment 202 can determine whether to prepare synchronization frame based on probability value for transmission.Alternatively, Probability value P_sync can be used to determine cancellation or transmit ready synchronization frame in equipment 202.Accordingly for any one It was found that the period, synchronization frame is only sent by the certain number of node in NAN.
For example, in some cases, probability value can on the order of 1, so that equipment 202 prepares synchronization frame for being directed to Each discovery period transmission.Alternatively, according to another embodiment, probability can be in such as 0.3 magnitude, so that equipment 202 Prepare synchronization frame only for transmitting during every about the discovery section of third discovery period.In one embodiment, each STA 106 optional type B error random numbers with P_sync to make comparisons, so that difference STA prepares synchronization frame in different discovery phases period Between transmit.By this method, synchronization frame be likely to be transmitted in the be found period but be transmitted by all STA.
In one embodiment, the value of P_sync can be adapted during operation.For example, the value of P_sync can be according in network STA quantity, and/or the STA quantity that is detected by equipment 202 be adapted to.For example, the value of P_sync can be with transmission method, apparatus STA quantity in 202 neighborhood increases and reduces.In one embodiment, equipment 202 1-3 can be based on number of devices according to the following formula N is measured to choose P_sync.
P_sync=max (p1, p2) ... (3)
As shown in equation 1 above -3, equipment 202 can choose P_sync, so that the number of devices of competition is with threshold probability T1 Greater than the target minimum number M1 of competition equipment.In various embodiments, M1 can be between about 1 to about 10, for example 1.In some embodiments, M1 can be confirmed as the percentage of N, and for example 1%, 5% or 10%.In various implementations In example, T1 can between about 0.9 to about 0.999, for example 0.9.Equipment 202, which can determine, as a result, meets the minimum of formula 1 P1, wherein erfc is error function complement.
Similarly, equipment 202 can choose P_sync, set so that the number of devices of competition is less than competition with threshold probability T2 Standby target maximum number M2.In various embodiments, M2 can between about 50 to about 100, for example 75.Some In embodiment, M2 can be confirmed as the percentage of N, and for example 10%, 15% or 20%.In various embodiments, T1 Can between about 0.01 to about 0.2, for example 0.1.Equipment 202 can determine the highest p2 for meeting formula 2 as a result, wherein Erfc is error function complement.
As shown in formula 3, P_sync can be chosen for the maximum value in p1 and p2 by equipment 202.In some embodiments, if Standby 202 can be chosen for P_sync the minimum value in p1 and p2.In various other embodiments, equipment 202 can select P_sync Another value being taken as between p1 and p2, for example p1 and p2 average or more generally the sum of p1 and p2 multiplied by one Score.
If equipment 202 will prepare synchronization frame based on probability P _ sync determination in frame 1101, in frame 1102, prepare to synchronize Frame is for transmission.If equipment 202 is determined in frame 1101 does not prepare synchronization frame, equipment 202 can listen to from other STA when Between value and the time value of their own is updated it is necessary to synchronous when (for example, in frame 1112) based on time of receipt (T of R) value.
As discussed above, in frame 1102, equipment 202 prepares synchronization frame for transmission.Synchronization frame may include equipment 202 Timestamp, as above referring for example to described in Figure 10.In addition, synchronization frame may include that mark equipment 202 is just participated NAN or the " network identifier of social Wi-Fi network." identifier can randomly give birth to when establishing network between STA for the first time At, and can be kept during the service life of the network.The equipment 202 for receiving the synchronization frame with network identifier is being received The network identifier of network currently just participated with the equipment 202 of network identifier match in the case where can be based only upon Time of receipt (T of R) value executes the update to time value.
In some embodiments, multiple nodes in NAN or each node can respectively prepare synchronization frame.In some embodiments In, the subset of devices in NAN is ready for synchronization frame.In some embodiments, the number of devices in the subset of devices can be based on NAN In number of devices.For example, probability value P_sync can be used to prepare synchronization frame, as described above in equipment 202.In some embodiments In, equipment 202 can determine its contention parameters based on its MPN.For example, the node with higher MPN can attempt relatively it is early (or compared with It is low) contention slots (or window) period transmission synchronization frame.
Next, equipment 202 can begin contending for regulation for transmitting synchronization frame during finding section in frame 1106. In one embodiment, the contention parameters based on its MPN can be used in equipment 202.However, in some cases, permitting in contention regulation Perhaps before equipment 202 transmits synchronization frame, synchronization frame can be received from another STA (for example, STA 106b) during finding section. As a result, in decision box 1108, determine during finding section whether from another STA 106b to receive synchronization frame.If according to sentencing Determine frame 1108 and do not receive synchronization frame from another STA 106b during finding section, then in frame 1109, is transmitted by equipment 202 Ready synchronization frame.
If receiving synchronization frame from another STA 106b, in frame 1110, equipment 202, which determines, transmits setting for the synchronization frame Whether standby MPN is greater than or equal to the MPN of equipment 202.For example, equipment 202 can be true from the capable field transmitted by STA 106b Determine the MPN of STA 106b.If receiving the current MPN that MPN is greater than or equal to equipment 202, equipment 202 is cancelled together in frame 1111 The transmission of step-frame.If receiving the current MPN that MPN is less than equipment 202, equipment 202, which is advanced to, joins in frame 1109 according to contention Number transmits ready synchronization frame in next pot life.Those of ordinary skill in the art will be appreciated that, replacement MPN can be used Scheme.In one embodiment, for example, lower MPN can have the larger preference to synchronization frame transmission.
In frame 1111, if to cancel synchronization frame transmission in 1108 determination of frame, equipment 202 can be listened to from other STA Time value and the time value of their own is updated based on time of receipt (T of R) value when it is necessary to synchronous.For example, being connect from STA 106b The timestamp received then can be used for according to one or more criterion come the potentially more time of new equipment 202, such as following Described in embodiment.
For example, in frame 1112, equipment 202 determines whether time of receipt (T of R) stamp is greater than the current time of equipment 202.If received Timestamp is greater than the current time stamp of equipment 202, then equipment 202 uses time of receipt (T of R) stamp to be used to determine when to transmit and connect It receives, as shown in frame 1114.Otherwise, the current time stamp of equipment 202 is not used in frame 1116.In another embodiment, equipment 202 its time value can be updated to all times of receipt (T of R) stamp, by the stamp of all times of receipt (T of R) sent of the STA with higher MPN or The maximum value in timestamp separately provided by any equipment, or embodiment described herein combination.The timestamp of equipment 202 It can not be taken into account when determining maximum value.This measure can ensure that with the very fast equipment drifted about and not yet transmit its synchronization frame 202 keep its clock synchronous.
In one embodiment, for based on the time value received from another STA 106b come the current of more new equipment 202 The signal strength that receives that the criterion of time value can further depend on equipment 202 indicates (RSSI).For example, based on equipment 202 RSSI, or even the occasion of synchronization frame is received in equipment 202, it, which can still be advanced to, transmits the synchronization frame that it is ready for.? In another embodiment, when whether the criterion for the more current time value of new equipment 202 can be based on the time of receipt (T of R) than current device Between big threshold quantity.In one embodiment, which can be based on maximum allowable clock skew network parameter.
Figure 12 shows the flow chart 1200 of the method for the transmission synchronization frame according to an embodiment.In some embodiments, Synchronization frame during this method tunable respectively finds TBTT and/or beacon window between window transmits.This method can all or Partly as equipment described herein (STA 106a-shown in all wireless devices 202 as shown in Figure 2 or Figure 1A -1B Any STA in 106i) it realizes.Although the method explained is referring to the nothing discussed above with respect to Figure 1A -1B herein Line communication system 100 and 160 and the wireless device 202 discussed above with respect to Fig. 2 describe, but the common skill in this field Art personnel will be appreciated that the method explained can be realized by another equipment described herein or any other suitable equipment. Although the method explained is described herein referring to certain order, in various embodiments, each frame of this paper can be pressed Different order are executed or are omitted, and can add supplementary frame.
Firstly, in frame 1205, equipment 202 determines whether it is transferred successfully synchronization frame during upper discovery window. For example, equipment 202 can determine whether its frame 1109 in Figure 11 transfers ready synchronization frame.If equipment 202 is upper one Without transmission synchronization frame during a discovery window, then it may act as non-main controlled node.Correspondingly, equipment 202 can be made in frame 1210 Only transmit additional synchronization frame.
In one embodiment, in frame 1210, equipment 202 can prevent the additional synchronization frame of transmission going through up to current discovery section When.In other words, equipment 202 can prevent the additional synchronization frame of transmission at least up to next discovery window, in next discovery During window, equipment 202 can re-initiate the contention process described in the flow chart 1100 of Figure 11.In some embodiments, Equipment 202 can be prevented specifically during each TBTT and/or beacon window found between window and transmit additional synchronization frame.
Next, in frame 1215, when equipment 202 transfers synchronization frame during upper discovery window, equipment 202 Determine if to have received and/or decode another synchronization frame with higher MPN from an equipment.If equipment 202 exists The synchronization frame with higher MPN is had received during current discovery section, then the equipment may act as non-main controlled node.For example, MPN It can be included in the capable field for receiving synchronization frame.Correspondingly, equipment 202 can be prevented in frame 1210 and transmit additional synchronization Frame.
Then, in frame 1220, when equipment 202 not yet receives the synchronization frame with higher MPN from an equipment, equipment 202 can serve as main controlled node in frame 1220.Correspondingly, equipment 202 can currently discovery section one or more TBTT and/or Synchronization frame is transmitted during beacon window.In some embodiments, equipment 202 can pass during each TBTT and/or beacon window Synchronization frame is sent, at least up to next discovery window.During next discovery window, equipment 202 can be re-initiated in Figure 11 Flow chart 1100 described in contention process.Correspondingly, main controlled node can be more liberally determined, because they can be organic It can change in each discovery window.
In some embodiments, equipment 202 can for example continue to monitor synchronization frame in each subsequent TBTT and/or beacon window Transmission.If equipment 202 sees another synchronization frame associated with higher MPN, equipment 202 can be characterized as non-master control again Node.Correspondingly, equipment 202 can be prevented in frame 1210 and transmit additional synchronization frame.
Figure 13 shows the flow chart for the example wireless communication means that can be used in the wireless communication system 100 of Fig. 1 1300.This method can be realized entirely or partly by equipment described herein (all wireless devices 202 as shown in Figure 2). Although the method explained is herein defined as referring to the wireless communication system 100 discussed above with respect to Fig. 1, above with respect to Fig. 2 The wireless device 202 discussed and the NAN frame 500 discussed above with respect to Fig. 5 A describe, but ordinary skill Personnel will be appreciated that the method explained can be realized by another equipment described herein or any other suitable equipment. Although the method explained is described herein referring to certain order, in various embodiments, each frame of this paper can be pressed Different order are executed or are omitted, and can add supplementary frame.
Firstly, in frame 1302, equipment 202 generates NAN frame, the NAN frame include the first address field, the second address field, One or more of third address field and information element.For example, processor 204 can be generated including A1 field 506, A3 word The NAN frame 500 of 510 and/or NAN of section IE 520.In various embodiments, the first address field may include A1 field, A2 word Any of section, A3 field, receiver address field, transmitter address field, destination address field etc..In various realities It applies in example, the second address field may include A1 field, A2 field, A3 field, receiver address field, transmitter address word Any of section, destination address field etc..In one embodiment, third address field may include basic service set mark Know symbol (BSSID) field.
Next, equipment 202 is by NAN identifier code in the first address field, third address field and letter in frame 1304 It ceases at least one of element.For example, processor 204 can encode the NAN identifier 550 described above with respect to Fig. 5 B In A1 field 506, A3 field 510, and/or NAN IE 520.In one embodiment, NAN identifier may include instruction NAN frame Tissue unique identification (OUI).For example, NAN identifier 550 may include OUI 560 (Fig. 5 B).
In various embodiments, NAN identifier may further include one or more of the hash comprising application identifier A bit.For example, the 4th to the 5th eight-bit group 554-555 (Fig. 5 B) may include the hash of application identifier.In various realities It applies in example, NAN identifier may further include the minimum effective eight-bit group for indicating specific NAN.For example, the 6th eight-bit group 556 (Fig. 5 B) may include the value for indicating specific NAN.
In various embodiments, NAN identifier may further include minimum effective eight-bit group of instruction wildcard NAN. For example, the 6th eight-bit group 556 (Fig. 5 B) can indicate wildcard NAN when being arranged to retention (such as 0xFF).Various In embodiment, NAN identifier may further include the secondary identifier of instruction NAN frame, and NAN frame may further include finger Show the subsequent field of specific NAN.
Then, in frame 1306, equipment 202 transmits the NAN frame.For example, transmitter 214 can transmit NAN frame 500.One In a little embodiments, equipment 202 can further make NAN identifier when NAN identifier is coded in receiver address field Multicast flag set.Equipment 202 can further make multicast mark when NAN identifier is coded in destination address field Will is cancelled set.
In some embodiments, equipment 202 can further identify one or more NAN characteristics.Equipment 202 can be into one Step is by one or more NAN characteristic encoding in NAN identifier.In various embodiments, one or more NAN characteristic packet Include it is following one or more: be the identifier of NAN frame, device cluster set identifier, one or more NAN cluster about the NAN frame Parameter, discovery window indicator, discovery period indicator, master control preference number, the equipment energy for finding channel indicator, transmission equipment Power indicator, window information indicator, NAN basic service set identifier, cluster size instruction or estimation, clock accuracy refer to Show and clock type indicates.
In one embodiment, it may include generative circuit, coding circuit and transmission that method shown in Figure 13, which may be implemented in, In the wireless device of circuit.Skilled artisans will appreciate that wireless device can have than simplified wireless device described herein More components.Wireless device described herein only includes some prominent of the realization being intended to fall within the scope of the appended claims for description Those of useful component for feature out.
Generative circuit can be configured to generate NAN frame.Generative circuit can be configured to the frame 1302 at least executing Figure 13.It is raw It may include one or more of processor 204 (Fig. 2) and memory 206 (Fig. 2) at circuit.In some implementations, for giving birth to At device may include the generative circuit.
Coding circuit can be configured to NAN identifier code in NAN frame.Coding circuit can be configured at least execute The frame 1304 of Figure 13.Coding circuit may include one or more of processor 204 (Fig. 2) and memory 206 (Fig. 2).One In a little realizations, the device for coding may include the coding circuit.
Transmitting circuit can be configured to transmission NAN frame.Transmitting circuit can be configured to the frame 1306 at least executing Figure 13.It passes Power transmission road may include one or more of transmitter 210 (Fig. 2), antenna 216 (Fig. 2) and transceiver 214 (Fig. 2).One In a little realizations, the device for transmission may include the transmitting circuit.
Figure 14 shows the stream for the another exemplary wireless communications method that can be used in the wireless communication system 100 of Fig. 1 Journey Figure 140 0.This method can be entirely or partly by equipment described herein (all wireless devices 202 as shown in Figure 2) Lai real It is existing.Although the method explained be herein defined as referring to the wireless communication system 100 discussed above with respect to Fig. 1, above with respect to Wireless device 202 that Fig. 2 is discussed and the NAN frame 500 discussed above with respect to Fig. 5 A describe, but this field is common Technical staff will be appreciated that, the method explained can by another equipment described herein or any other suitable equipment Lai It realizes.Although the method explained is described herein referring to certain order, in various embodiments, each frame of this paper It can execute or be omitted in different order, and supplementary frame can be added.
Firstly, equipment 202 receives NAN frame, which includes receiver address field, destination-address word in frame 1402 One or more of section and information element.For example, receiver 212 can receive including A1 field 506, A3 field 510 and/ Or the NAN frame 500 of NAN IE 520.In various embodiments, the first address field may include A1 field, A2 field, A3 word Any of section, receiver address field, transmitter address field, destination address field etc..In various embodiments, Second address field may include A1 field, A2 field, A3 field, receiver address field, transmitter address field, destination Any of address field etc..In one embodiment, third address field may include basic service set identifier (BSSID) field.
Next, equipment 202 is based in receiver address field, destination address field and information element in frame 1404 At least one determine NAN identifier.For example, processor 204 can be based on A1 field 506, A3 field 510, and/or NAN IE 520 come determine above with respect to Fig. 5 B description NAN identifier 550.In one embodiment, NAN identifier may include instruction The tissue unique identification (OUI) of NAN frame.For example, NAN identifier 550 may include OUI 560 (Fig. 5 B).
In some embodiments, equipment 202 can be further when NAN identifier be coded in receiver address field Decode the multicast mark of NAN identifier being set.Equipment 202 can further NAN identifier with being coded in destination The multicast mark of the non-set of decoding when in the field of location.
In some embodiments, equipment 202 can further decode one or more NAN characteristics.Equipment 202 can be into one Step is using the one or more NAN characteristic in NAN identifier.In various embodiments, one or more NAN characteristic includes Below one or more: about the NAN frame be the identifier of NAN frame, device cluster set identifier, one or more NAN cluster ginseng Number, discovery window indicator, discovery period indicator, discovery channel indicator, the master control preference number of transmission equipment, capacity of equipment Indicator, window information indicator, NAN basic service set identifier, cluster size indicate or estimation, clock accuracy indicate, And clock type instruction.
In one embodiment, it may include receiving circuit and determining that the wireless of circuit is set that method shown in Figure 14, which may be implemented in, In standby.Skilled artisans will appreciate that wireless device can have components more more than simplified wireless device described herein.This The wireless device of text description only includes having for some prominent features for the realization that description is intended to fall within the scope of the appended claims With those of component.
Receiving circuit can be configured to receive NAN frame.Receiving circuit can be configured to the frame 1402 at least executing Figure 14.It connects Receiving circuit may include one or more of receiver 212 (Fig. 2), antenna 216 (Fig. 2) and transceiver 214 (Fig. 2).One In a little realizations, means for receiving may include receiving circuit.
Determine that circuit can be configured to determine NAN identifier based on NAN frame.Determine that circuit can be configured at least execute The frame 1404 of Figure 14.Determine that circuit may include one or more of processor 204 (Fig. 2) and memory 206 (Fig. 2).One It may include determining circuit for determining device in a little realizations.
It should be appreciated that it is used herein such as " the first ", " the second " or the like it is specified general to any citation of element The quantity or order of these elements are not limited.Specifically, these are specified and can be used herein as distinguishing two or more The convenient wireless device of element or element instance.Therefore, the citation of the first element and second element is not meant to here Only two elements or the first element, which can be used, to be located at before second element in some way.In addition, unless stated otherwise, Otherwise element set may include one or more elements.
It will be appreciated by the skilled addressee that information and signal can be used in various different skill and technology It is any to indicate.The data that may be addressed always, instruction, order, information, signal, position (ratio is described above for example, running through It is special), symbol and chip can by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle, or any combination thereof Lai It indicates.
Those of ordinary skill in the art will further appreciate that, in conjunction with the various illustratives of aspect disclosed herein description Any one of logical block, module, processor, device, circuit and algorithm steps can be implemented as electronic hardware (for example, number Realize, simulated implementation or combination of the two, source code or other certain technologies can be used to design for they), be included in instruction Various forms of programs or design code (software feeding or software module feeding for simplicity, may be called herein), Or combination of the two.This of hardware and software interchangeability for a clear explanation, various illustrative components, block, module, electricity Road and step are to make generalization description in the form of its is functional above.Such functionality is implemented as hardware still Software depends on concrete application and the design constraint for being applied to total system.Technical staff can be for every kind of specific application with difference Mode realizes described function, but such realization decision is not to be read as causing a departure from the scope of the present invention.
In conjunction with various aspects disclosed herein and various illustrative logical blocks, module and the electricity of combination Fig. 1-9 description Road can be realized in integrated circuit (IC), access terminal or access point or be executed by it.IC may include being designed to carry out herein Described in function general processor, digital signal processor (DSP), specific integrated circuit (ASIC), field-programmable Gate array (FPGA) or other programmable logic device, discrete door or transistor logic, discrete hardware component, electrical component, Optical module, mechanical component, or any combination thereof, and it is executable reside in inside IC, the code outside IC or both or instruction. These logical blocks, module and circuit may include antenna and/or transceiver to communicate with the various assemblies in network or in equipment. General processor can be microprocessor, but in alternative, processor can be any conventional processor, controller, Microcontroller or state machine.Processor be also implemented as calculate equipment combination, such as DSP and microprocessor combination, Multi-microprocessor, the one or more microprocessors cooperateed with DSP core or any other such configuration.It can be by such as originally Certain other modes taught in text realize the functionality of these modules.Herein (for example, attached about one or more Figure) described function can correspond to similarly to name in appended claims in some respects " for functional Device ".
If realized in software, each function can be used as one or more instruction or code be stored in it is computer-readable It is transmitted on medium or by it.The step of method disclosed herein or algorithm, can reside in computer-readable medium On processor can be performed software module in realize.Computer-readable medium includes computer storage media and communication media two Computer program is transferred to any medium on another ground including can be implemented so that by person from one.Storage medium can be can quilt Any usable medium of computer access.It is non-limiting as example, such computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage apparatus can be used to store instruction or data The expectation program code of structure type and any other medium that can be accessed by a computer.Any connection can also be properly called Computer-readable medium.As used herein disk (disk) and dish (disc) include compress dish (CD), laser disc, optical disc, Digital universal dish (DVD), floppy disk and blu-ray disc, which disk (disk) is often reproduced magnetically data and dish (disc) is used and swashed Light is reproduce data optically.Combinations of the above should be also included in the range of computer-readable medium.In addition, method Or the operation of algorithm can be used as code and instruction one of or code and instruction any combination or set and residing in can be received Enter on the machine readable media and computer-readable medium in computer program product.
It should be appreciated that it is any in the disclosed process the step of any certain order or stratum be all showing for example method Example.Based on design preference, it will be understood that these during step specific order or hierarchy can be rearranged and still in the disclosure Within the scope of.The element of various steps is presented with example order for appended claim to a method, and is not meant to be defined to The specific order or hierarchy presented.
Various changes to realization described in the disclosure may be it will be evident that and herein for those skilled in the art Defined in generic principles can be applied to other be implemented without be detached from the disclosure spirit or scope.The disclosure is simultaneously as a result, Be not intended to be defined to realization shown herein, but should be awarded with claims, principle disclosed herein and The consistent broadest range of novel features.Herein exclusively with word " it is exemplary " indicate " and be used as example, example or It explains ".Here depicted as " it is exemplary " any realization be not necessarily to be construed as preferred or advantageous over other realize.
Certain features described in the context being implemented separately can also be realized in combination in this specification is individually realizing In.On the contrary, the various features described in the context individually realized can also be in multiple realizations dividually or with any suitable Sub-portfolio realize.In addition, although all features may be described as working in a manner of certain combinations above and even most It is just so claimed, but in some cases can be from the group from combined one or more features claimed Remove in conjunction, and combination claimed can be for the variant of sub-portfolio or sub-portfolio.
Similarly, although depicting all operations in the accompanying drawings with certain order, this is understood not to require such Operation certain order shown in is desired to execute or to execute all explained operations just and can reach in order As a result.In certain environments, multitasking and parallel processing may be advantageous.In addition, in implementations described above The separating of various system components be understood not to require in all realizations it is such separated, and it is to be understood that described Program assembly and system generally can be integrated together in single software product or be packaged into multiple software product.In addition, its He realizes and also falls within the scope of appended claims.In some cases, the movement described in claim can be by difference Order executes and still reaches desired result.
1. method of the one kind for being communicated in neighborhood aware network (NAN), comprising:
Generate includes one or more following NAN frame:
The first address field including receiver address field；
The second address field including transmitter address field；Or
Third address field including destination address field or basic service set identifier (BSSID) field；
It will include the NAN identifier code of at least one cluster identifier symbol in the NAN frame；
It will include transmitting the information element coding of the master control preference number of method, apparatus in the NAN frame, the master control preference number is extremely Partially determined according to whether the transmission method, apparatus is just receiving power from external power source；
Master control preference number associated with another equipment in the NAN is received by the transmission method, apparatus；And
If the master control preference number of the transmission method, apparatus is greater than the master control preference associated with another equipment Number, then transmit the NAN frame.
The NAN frame includes sync beacon or discovery frame；
First address field includes the cluster identifier symbol with the instruction that multicasts；
Second address field includes source address；And
The third address field includes indicating that the frame is the value of NAN frame.
First address field includes indicating that the frame is the value of NAN frame；
The third address field includes the cluster identifier symbol.
The NAN frame includes multicast discovery frame；
5. the method as described in claim 1, which is characterized in that
6. the method as described in claim 1, which is characterized in that
The NAN frame includes unicast discovery frame；
First address field includes destination-address；
The third address field includes the cluster identifier symbol that there is unicast to indicate.
7. method according to claim 2, which is characterized in that indicate that the frame is the described value of NAN frame including being attached to finger Show the value 0xFF of the tissue unique identification (OUI) of NAN frame.
8. the method as described in claim 1, which is characterized in that the NAN frame includes frame control field, the frame control field Followed by duration field, followed by described first address field of the duration field, first address field are followed by described Second address field, the followed by described third address field of the second address field.
9. the method as described in claim 1, which is characterized in that the third address field includes destination address field.
10. the method as described in claim 1, which is characterized in that the third address field includes BSSID field.
11. the method as described in claim 1, which is characterized in that the NAN identifier includes indicating that the tissue of NAN frame is unique Property identifier (OUI).
12. method as claimed in claim 11, which is characterized in that the NAN identifier further comprises comprising application identities One or more bits of the hash of symbol.
13. method as claimed in claim 11, which is characterized in that the NAN identifier further comprises indicating specific NAN Minimum effective eight-bit group.
14. method as claimed in claim 11, which is characterized in that the NAN identifier further comprises instruction wildcard NAN Minimum effective eight-bit group.
15. method as claimed in claim 11, which is characterized in that the NAN identifier further comprises the pair for indicating NAN frame Identifier, and the NAN frame further comprises the subsequent field for indicating specific NAN.
16. the method as described in claim 1, which is characterized in that further comprise:
Make the multicast flag set of the NAN identifier when the NAN identifier is coded in first address field； And
The multicast mark is set to cancel set when the NAN identifier is coded in second address field.
17. the method as described in claim 1, which is characterized in that further comprise:
Identify one or more NAN characteristic；And
By one or more of NAN characteristic encodings in the NAN identifier.
18. method as claimed in claim 17, which is characterized in that one or more of NAN characteristics include following one or More persons: being identifier, cluster identifier symbol, one or more NAN cluster parameter, the discovery window of NAN frame about the NAN frame Mouth indicator, discovery period indicator, discovery channel indicator, capacity of equipment indicator, window information indicator, NAN are basic Service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock type instruction.
19. one kind is configured to the equipment communicated in neighborhood aware network (NAN), the equipment includes:
Third address field including destination address field or basic service set identifier (BSSID) field；And
It will include the NAN identifier code of at least one cluster identifier symbol in the NAN frame；And
The information element of master control preference number including the equipment is encoded in the NAN frame, the master control preference number is at least Partly determined according to whether the equipment is just receiving power from external power source；
Receiver is configured to receive master control preference number associated with another equipment in the NAN；And
Transmitter, if the master control preference number for being configured to the equipment is greater than institute associated with another equipment Master control preference number is stated, then transmits the NAN frame.
20. equipment as claimed in claim 19, it is characterised in that:
21. equipment as claimed in claim 19, it is characterised in that:
22. equipment as claimed in claim 19, it is characterised in that:
23. equipment as claimed in claim 19, it is characterised in that:
24. equipment as claimed in claim 19, it is characterised in that:
25. equipment as claimed in claim 20, which is characterized in that indicate that the frame is the described value of NAN frame including being attached to Indicate the value 0xFF of the tissue unique identification (OUI) of NAN frame.
26. equipment as claimed in claim 19, which is characterized in that the NAN frame includes frame control field, the frame control word Section followed by duration field, followed by described first address field of the duration field, first address field followed by institute State the second address field, the followed by described third address field of the second address field.
27. equipment as claimed in claim 19, which is characterized in that the third address field includes destination address field.
28. equipment as claimed in claim 19, which is characterized in that the third address field includes BSSID field.
29. equipment as claimed in claim 19, which is characterized in that the NAN identifier includes indicating that the tissue of NAN frame is unique Property identifier (OUI).
30. equipment as claimed in claim 28, which is characterized in that the NAN identifier further comprises comprising application identities One or more bits of the hash of symbol.
31. equipment as claimed in claim 28, which is characterized in that the NAN identifier further comprises indicating specific NAN Minimum effective eight-bit group.
32. equipment as claimed in claim 28, which is characterized in that the NAN identifier further comprises instruction wildcard NAN Minimum effective eight-bit group.
33. equipment as claimed in claim 28, which is characterized in that the NAN identifier further comprises the pair for indicating NAN frame Identifier, and the NAN frame further comprises the subsequent field for indicating specific NAN.
34. equipment as claimed in claim 19, which is characterized in that the processor is further configured to:
35. equipment as claimed in claim 19, which is characterized in that the processor is further configured to:
36. equipment as claimed in claim 35, which is characterized in that one or more of NAN characteristics include following one or More persons: being identifier, cluster identifier symbol, one or more NAN cluster parameter, the discovery window of NAN frame about the NAN frame Mouth indicator, discovery period indicator, discovery channel indicator, capacity of equipment indicator, window information indicator, NAN are basic Service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock type instruction.
37. equipment of the one kind for being communicated in neighborhood aware network (NAN), the equipment include:
For generate include it is following one or more NAN frame device:
The second address field including receiver address field；Or
For that will include device of the NAN identifier code of at least one cluster identifier symbol in the NAN frame；
For will include the equipment master control preference number information element coding device, the master control preference number is at least partly Ground is determined according to whether the equipment is just receiving power from external power source；
For receiving the device of master control preference number associated with another equipment in the NAN；And
If the master control preference number for the equipment is greater than the master control preference number associated with another equipment, Then transmit the device of the NAN frame.
38. equipment as claimed in claim 37, which is characterized in that further comprise:
For making the multicast mark of the NAN identifier when the NAN identifier is coded in first address field The device of set；And
For making the multicast mark cancel the dress of set when the NAN identifier is coded in second address field It sets.
39. equipment as claimed in claim 37, which is characterized in that further comprise:
For identifying the device of one or more NAN characteristics；And
For the device by one or more of NAN characteristic encodings in the NAN identifier.
40. a kind of non-transient computer-readable media for being stored thereon with computer program, the computer program can be by one Or multiple processors are executed for executing following steps:
Generate includes one or more following neighborhood aware network (NAN) frame:
The second address field including transmitter address field；
The information element of master control preference number including device is encoded in the NAN frame, the master control preference number is at least partly Ground is determined according to whether described device is just receiving power from external power source；
Receive master control preference number associated with another equipment in the NAN；And
If the master control preference number of described device is greater than the master control preference number associated with another equipment, pass Send the NAN frame.
41. non-transient computer-readable media as claimed in claim 40, which is characterized in that the computer program can be by one A or multiple processors are executed for executing following steps:
42. non-transient computer-readable media as claimed in claim 40, which is characterized in that the computer program can be by one A or multiple processors are executed for executing following steps:
43. method of the one kind for being communicated in neighborhood aware network (NAN), comprising:
Being received by device includes one or more following NAN frame:
Third address field；
Determine the NAN identifier including at least one cluster identifier symbol in the NAN frame
Determine the NAN frame, including transmit method, apparatus master control preference number information element coding, the master control preference number is extremely Partially determined according to whether the transmission method, apparatus is just receiving power from external power source；And
If master control preference number associated with described device is greater than the master control preference number of the transmission method, apparatus, transmit Synchronization frame.
44. method as claimed in claim 43, which is characterized in that
45. method as claimed in claim 43, which is characterized in that
46. method as claimed in claim 43, which is characterized in that
47. method as claimed in claim 43, which is characterized in that
48. method as claimed in claim 43, which is characterized in that
49. method as claimed in claim 44, which is characterized in that indicate that the frame is the described value of NAN frame including being attached to Indicate the value 0xFF of the tissue unique identification (OUI) of NAN frame.
50. method as claimed in claim 43, which is characterized in that the NAN frame includes frame control field, the frame control word Section followed by duration field, followed by described first address field of the duration field, first address field followed by institute State the second address field, the followed by described third address field of the second address field.
51. method as claimed in claim 43, which is characterized in that the third address field includes destination address field.
52. method as claimed in claim 43, which is characterized in that the third address field includes BSSID field.
53. method as claimed in claim 43, which is characterized in that the NAN identifier includes indicating that the tissue of NAN frame is unique Property identifier (OUI).
54. method as claimed in claim 52, which is characterized in that the NAN identifier further comprises comprising application identities One or more bits of the hash of symbol.
55. method as claimed in claim 52, which is characterized in that the NAN identifier further comprises indicating specific NAN Minimum effective eight-bit group.
56. method as claimed in claim 52, which is characterized in that the NAN identifier further comprises instruction wildcard NAN Minimum effective eight-bit group.
57. method as claimed in claim 52, which is characterized in that the NAN identifier further comprises the pair for indicating NAN frame Identifier, and the NAN frame further comprises the subsequent field for indicating specific NAN.
58. method as claimed in claim 43, which is characterized in that
The multicast mark of the NAN identifier is set when the NAN identifier is coded in first address field； And
The multicast mark is cancelled set when the NAN identifier is coded in second address field.
59. method as claimed in claim 43, which is characterized in that further comprise:
Decode one or more NAN characteristics in the NAN identifier；And
Using one or more NAN characteristics.
60. method as claimed in claim 59, which is characterized in that one or more of NAN characteristics include following one or More persons: being identifier, cluster identifier symbol, one or more NAN cluster parameter, the discovery window of NAN frame about the NAN frame Mouth indicator, discovery period indicator, master control preference number, the capacity of equipment indicator, window for finding channel indicator, transmission equipment Mouth message indicator, NAN basic service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock class Type instruction.
61. one kind is configured to the equipment communicated in neighborhood aware network (NAN), the equipment includes:
Receiver, being configured to receive includes one or more following NAN frame:
Determine the NAN identifier including at least one cluster identifier symbol in the NAN frame；And
Transmitter, if being configured to the master that master control preference number associated with the equipment is greater than the transmission method, apparatus Preference number is controlled, then transmits synchronization frame.
62. equipment as claimed in claim 61, it is characterised in that:
63. equipment as claimed in claim 61, it is characterised in that:
64. equipment as claimed in claim 61, it is characterised in that:
65. equipment as claimed in claim 61, it is characterised in that:
66. equipment as claimed in claim 61, it is characterised in that:
67. equipment as claimed in claim 62, which is characterized in that indicate that the frame is the described value of NAN frame including being attached to Indicate the value 0xFF of the tissue unique identification (OUI) of NAN frame.
68. equipment as claimed in claim 61, which is characterized in that the NAN frame includes frame control field, the frame control word Section followed by duration field, followed by described first address field of the duration field, first address field followed by institute State the second address field, the followed by described third address field of the second address field.
69. equipment as claimed in claim 61, which is characterized in that the third address field includes destination address field.
70. equipment as claimed in claim 61, which is characterized in that the third address field includes BSSID field.
71. equipment as claimed in claim 61, which is characterized in that the NAN identifier includes indicating that the tissue of NAN frame is unique Property identifier (OUI).
72. the equipment as described in claim 70, which is characterized in that the NAN identifier further comprises comprising application identities One or more bits of the hash of symbol.
73. the equipment as described in claim 70, which is characterized in that the NAN identifier further comprises indicating specific NAN Minimum effective eight-bit group.
74. the equipment as described in claim 70, which is characterized in that the NAN identifier further comprises instruction wildcard NAN Minimum effective eight-bit group.
75. the equipment as described in claim 70, which is characterized in that the NAN identifier further comprises the pair for indicating NAN frame Identifier, and the NAN frame further comprises the subsequent field for indicating specific NAN.
76. equipment as claimed in claim 61, it is characterised in that:
77. equipment as claimed in claim 61, which is characterized in that the processor is further configured to:
78. the equipment as described in claim 77, which is characterized in that one or more of NAN characteristics include following one or More persons: being the identifier of NAN frame, device cluster set identifier, one or more NAN cluster parameter, discovery window about the NAN frame Mouth indicator, discovery period indicator, master control preference number, the capacity of equipment indicator, window for finding channel indicator, transmission equipment Mouth message indicator, NAN basic service set identifier, cluster size instruction or estimation, clock accuracy instruction and clock class Type instruction.
79. equipment of the one kind for being communicated in neighborhood aware network (NAN), the equipment include:
For receive include it is following one or more NAN frame device:
For determining the device of the NAN identifier including at least one cluster identifier symbol in the NAN frame
For determine the NAN frame, including transmit method, apparatus master control preference number information element coding device, the master Control preference number is determined based in part on whether the transmission method, apparatus is just receiving power from external power source；And
If being greater than the master control preference number of the transmission method, apparatus for master control preference number associated with the equipment, Transmit the device of synchronization frame.
80. the equipment as described in claim 79, which is characterized in that further comprise processor, the processor is configured to:
81. a kind of non-transient computer-readable media for being stored thereon with computer program, the computer program can be by one Or multiple processors are executed for executing following steps:
Receive includes one or more following neighborhood aware network (NAN) frame:
Determine the NAN identifier including at least one cluster identifier symbol in the NAN frame；
If master control preference number associated with device is greater than the master control preference number of the transmission method, apparatus, synchronization is transmitted Frame.
82. the non-transient computer-readable media as described in claim 81, which is characterized in that the computer program can be by one A or multiple processors are executed for executing following steps:
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