Source: http://www.google.com/patents/US20070260720
Timestamp: 2017-07-25 05:24:46
Document Index: 606941238

Matched Legal Cases: ['art 500', 'art 500', 'art 500', 'art 500', 'art 500', 'art 500', 'art 500', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600', 'art 600']

Patent US20070260720 - Mobility domain - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA technique for buffering multicast messages in an access point (AP) relates to buffering multicast messages in an AP when a client of the AP is in powersave mode. Attributes of clients are used to group the clients into subsets, so multicast messages only need to be buffered if one of the clients in...http://www.google.com/patents/US20070260720?utm_source=gb-gplus-sharePatent US20070260720 - Mobility domainAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20070260720 A1Publication typeApplicationApplication numberUS 11/417,830Publication dateNov 8, 2007Filing dateMay 3, 2006Priority dateMay 3, 2006Publication number11417830, 417830, US 2007/0260720 A1, US 2007/260720 A1, US 20070260720 A1, US 20070260720A1, US 2007260720 A1, US 2007260720A1, US-A1-20070260720, US-A1-2007260720, US2007/0260720A1, US2007/260720A1, US20070260720 A1, US20070260720A1, US2007260720 A1, US2007260720A1InventorsGary MorainOriginal AssigneeMorain Gary EExport CitationBiBTeX, EndNote, RefManPatent Citations (99), Referenced by (41), Classifications (9), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMobility domain
BACKGROUND [0001] In many networks standards two broad categorizes of transmissions are defined, unicast and multicast. Unicast transmissions are often defined as transmissions bound for individual clients. Multicast transmissions are often defined as transmissions bound for a group of clients. [0002] In many networks clients may operate in one of two modes: powersave and normal. In some cases, when a client is in powersave mode it no longer receives transmissions of data. There is a general need to buffer multicast packets when a client is in powersave mode. [0003] For the example of the wireless standard 802.11, APs may be configured to buffer multicast messages when received and a client is in powersave mode. The AP will transmit all buffered multicast messages at a later time set by a delivery traffic indication message (DTIM). In IEEE 802.11 the receipt of a multicast packet is not acknowledged by a client so there is a need to buffer multicast packets for transmission when intended recipients are capable of receiving the message. DTIM sets when clients in powersave mode, if operating normally, enable their receivers for transmission of buffered multicast transmissions. [0004] Buffering multicast data can cause performance problems. Often, when DTIM is reached buffered messages are sent in a rapid burst of multicast transmissions. The client may be unable to receive all the transmissions and drop part of the buffered multicast messages, because lost parts are not rebroadcast. In some instances the buffering of multicast messages may also cause problems such as increased latency and jitter. SUMMARY [0005] The following embodiments and aspects thereof are described and illustrated in conjunction with systems, tools, and methods that are meant to be exemplary and illustrative, not limiting in scope. In various embodiments, one or more of the above-described problems have been reduced or eliminated, while other embodiments are directed to other improvements. [0006] A technique for buffering multicast messages in an access point (AP). AP may, but not necessarily, include a processor, memory, one or more communication ports, and program modules and data structures. In some cases the AP will include a wireless communication port configured to use or capable of using the 802.11 standard. The AP may be coupled to a server and associated with clients. In some cases the AP includes a data structure storing the powersave mode of the clients, and the AP may also include a data structure storing other attributes of the clients. [0007] The AP may receive multicast messages intended to be forwarded to clients. Instead of buffering messages when any client is in powersave mode the AP may use attributes of the clients to group the clients into subsets based on the similar attributes. The AP may then buffer multicast messages when a client in powersave mode is in the same subset as an intended recipient of the multicast data. The buffered data may then be sent at DTIM. BRIEF DESCRIPTION OF THE DRAWINGS [0008] Embodiments of the invention are illustrated in the figures. However, the embodiments and figures are illustrative rather than limiting; they provide examples of the invention. [0009] FIG. 1 depicts an example of a system including clients which may be grouped into subsets. [0010] FIG. 2A depicts an example of a system including an access point, a server and a plurality of clients grouped into subsets. [0011] FIG.2B depicts an example of a system including an access point, a server and a plurality of clients, wherein the clients are grouped into subsets by their VLAN. [0012] FIG. 2C depicts an example of a system including an access point, a server and a plurality of clients, wherein the clients are grouped into subsets by their SSID. [0013] FIG. 2D depicts an example of a system including an access point, a server and a plurality of clients, wherein the clients are grouped into subsets by their encryption method. [0014] FIG. 3 depicts an example of a system including an access point, a server, a switch, and a plurality of clients, wherein the switch can configure the AP. [0015] FIG. 4 depicts an example of an access point for use in the system in FIG. 1, FIG. 2A, FIG. 2B, FIG. 2C, FIG. 2D, or FIG. 3. [0016] FIG. 5A depicts a flowchart of an example of a method for buffering multicast messages. [0017] FIG. 5B depicts a flowchart of an example of a method for buffering multicast messages using client VLAN attribute. [0018] FIG. 6 depicts a flowchart of an example of a method for buffering multicast packets. DETAILED DESCRIPTION [0019] FIG. 1 depicts an example of a system 100 including clients which may be grouped into subsets. The example of FIG. 1 is intended to show a conceptual view of the system 100. The system 100 includes an access point (AP) 102 coupled to a server 104, a computer 106 coupled to a network interface 108, a phone 110 coupled to a network interface 112, a personal data assistant (PDA) 114 coupled to a network interface 116, and a computer 118 coupled to a network interface 120. The network interfaces 108, 112, 116, and 120 are coupled to a network 124. A computer 126 is coupled to a network interface 128, an application server 130 is coupled to a network interface 132, and a database server 134 is coupled to a network interface 136. The network interfaces 128, 132, and 136 are also coupled to the network 124. [0020] In the example of FIG. 1, the AP 102 is configured to transmit data received from the server 104 to the network interfaces 108, 112, 116 and 120. The AP 102 is further able to buffer multicast data received from the server 104. The data received by the AP 102 from the server 104 does not necessarily originate from the server 104 and may originate from any source capable of transmitting to the server 104. [0021] Multicast data is data transmitted to multiple intended recipients. Multicast techniques include replicating the data only when required, thereby reducing redundant transmissions. An example of an implementation of multicast, not meant as a limitation, is IP multicast, which is a protocol for transmitting to multiple clients on a TCP/IP networks. Using IP multicast packets allows a sender to transmit a message to multiple intended recipients in a manner that is known to someone familiar with the art. [0022] In the example of FIG. 1, the AP 102 is coupled to the server 104 through any means known or convenient including a wireless connection utilizing two wireless radios, an infrared communication device, a dedicated wired connection, a wired local area network, a proprietary interface, etc. The AP 102 communicates with the network interfaces 108, 112, 116, and 120 through any known or convenient way, such as using packets, and communication may include wireless or wired transmissions, or a combination of wired and wireless transmissions, or any communication means known or convenient. [0023] In certain embodiments the communication between an AP and clients can be achieved through, by way of example but not limitation, the use of a wireless radio using the IEEE 802.11 standards. [0024] In a possible embodiment, an AP transmits data to a network interface divided into a plurality of data packets including a portion of the total data along with header data. In some embodiments the data packets will then be reassembled using header data. In certain embodiments the reassembly takes place by the network interface but in other embodiments a device other then a network interface may reassemble the packets. This may be accomplished in any way known or convenient. In other possible embodiments an AP is able to set the time clients in powersave mode exit powersave mode to receive buffered messages using DTIM. [0025] In the example of FIG. 1, the sever 104 is coupled to the AP 102 as described above. In the example FIG. 1, the server 104 appears to be configured using one server computer, but this is an example not meant as a limitation. The server 104 may be implemented any way known or convenient as would be appreciated by one familiar with the art. The server 104 can communicate with a network 124 and transmit data received from the network 124 to the AP 102. [0026] An example implementation of the server 104, not meant as a limitation, is the use of a RADIUS server. In another example embodiment a server comprises multiple devices operating in parallel or a distributed computing model as understood by someone familiar in the art. In another example embodiment a server and an AP are included physically or logically on one computer or electronic system. If in an example embodiment an AP is only a logical representation, the AP and the server would reside on the same device capable functioning as the AP and the server. [0027] In the example of FIG. 1, the computer 106 may include various hardware and/or software components and various combinations of components. Any known or convenient computer system can be used and examples not meant as limitations are a desktop computer or notebook computer. The computer 106 is coupled to the network interface 108 through any way known or convenient. The network interface 108 is capable of communicating with the AP 102 in any known or convenient way. In some example embodiments the computer is able to send or receive multicast messages. [0028] Examples of possible implementations of couplings not meant as limitations are a network interface built into a computer motherboard or as a network interface connected to an expansion slot on the computers motherboard. [0029] In the example of FIG. 1, the network interface 108 can communicate with AP 102. Communication between the network interface 108 and the AP 102 can be done by any method known or convenient such as, by way of example but not limitation, through a wireless radio, through a wired modem, through a network, etc. An example embodiment of a network interface is a wireless radio configured to use an IEEE 802.11 wireless standard. [0030] Examples of possible wireless standards included as way of example but not as a limitation are 802.11 and 802.16. All the above standards are based on standards developed by the IEEE.: 802.11—applies to wireless LANs and provides 1 or 2 Mbps transmission in the 2.4 GHz band using either frequency hopping spread spectrum (“FHSS”) or direct sequence spread spectrum (“DSSS”). 802.11a—an extension to 802.11 that applies to wireless LANs and provides up to 54 Mbps in the 5 GHz band. 802.11a uses orthogonal frequency division multiplexing encoding. 802.11b (also referred to as Wi-Fi)—an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the 2.4 GHz band. 802.11b uses only DSSS. 802.11g—applies to wireless LANs and provides 20+ Mbps in the 2.4 GHz band. 802.16 (also referred to as WiMAX)—applies to wireless LANs and provides for transmissions in the 10 to 66 GHz bands and supports continuously varying traffic levels at many licensed frequencies for two-way communications. The draft amendment for the 2 to 11 GHz region will support both unlicensed and licensed bands. [0036] As used here, the wireless 802.11 standard may include one or more extensions, not limited to those described above by way of example but not limitation. The preceding list is given as an example only and is in no way meant to be exhaustive on possible wireless standards possible to use. It would be impractical to list every possible wireless standard that could be used in conjunction with the techniques described herein. Any of the preceding communication standards may be used in any previous or subsequent discussion of wireless transmissions of data. [0037] In the example of FIG. 1, the phone 110 is any known or convenient implementation which allows the transmission of sound. Examples of phones not meant as a limitations include a standard phone, a phone designed for communication over a network, or a microphone and speaker combination on a computer. Some phones may include video components, and some phones are capable of converting analog to digital. In some embodiments the phone is able to send and/or receive multicast messages. [0038] In the example of FIG. 1, the network interface 112 is coupled to the phone 110 in any way known or convenient. Examples of couplings not meant as limitations include a phone and network interface included as one physical device or plugging a phone into a network interface. [0039] In the example of FIG. 1, the network interface 112 can communicate with AP 102. Communication between the network interface 112 and the AP 102 can be done by any method known or convenient and examples not meant as limitation include through a wireless radio, through a wired modem, or through a network. [0040] In the example of FIG. 1, the PDA 114 is any known or convenient implementation. Examples of a PDA include by way of example but not limitation a Black Berry, a PocketPC, or a Palm Pilot. [0041] In the example of FIG. 1, the network interface 114 is coupled to the PDA 114 in any manner known or convenient. Examples of couplings not meant as limitations include a network interface and a PDA as components in one physical device, a network interface connected through an expansion slot on a PDA, or through another communication means such as blue tooth or infrared. In some embodiments the PDA is able to receive and/or send multicast messages. [0042] In the example of FIG. 1, the network interface 114 can communicate with AP 102. Communication between the network interface 114 and the AP 102 can be done by any method known or convenient and examples not meant as limitation includes through a wireless radio, through a wired modem, or through a network. [0043] In the example of FIG. 1, the computer 118 and the network interface 120 are similar to those described in reference to computer 106 and network interface 108. [0044] In the example of FIG. 1, the network 124 can be any implementation of a network known or convenient. The network 124 is able to transmit data received from the network interfaces 128, 132, and 136 to the server 104. Some possible examples of networks not meant as limitations include a LAN, an intranet, the internet, or a combinations of different networks. [0045] In the example of FIG. 1, the computer 126 may include various hardware and/or software components and various combinations of components. Any known or convenient computer system can be used and examples not meant as limitations are a desktop computer or notebook computer. The computer 126 is coupled to the network interface 128 through any way known or convenient. Examples of possible couplings not meant as limitations are a network interface built into a computer motherboard or as a network interface connected to an expansion slot on the computers motherboard. In some embodiments a computer is able to send a multicast message to multiple recipients. [0046] In the example of FIG. 1, the application server 130 may include various hardware and/or software components and various combinations of components. The application server 130 is configured to run a software application or a plurality of software applications and provide use of the applications to others. Any known or convenient implementation of an application server can be used. In certain embodiments an application server is able to transmit multicast data. [0047] In the example of FIG. 1, the network interface 132 is coupled to the application server 130 through any way known or convenient. Examples of possible couplings not meant as limitations are a network interface built into an application server motherboard, a network interface connected to an expansion slot on an application server, or any way known or convenient. In some embodiments an application server is able to send a multicast message. [0048] In the example of FIG. 1, the database server 134 may be implemented by various hardware and/or software components and various combinations of components. The database server 134 is configured to run database management software and provide data contained within the database to others. Any known or convenient implementation of a database server can be used. In some embodiments the database sever is capable of transmitting multicast messages. [0049] In the example of FIG. 1, the network interface 136 is coupled to the database server 134 through any way known or convenient. Examples of possible couplings not meant as limitations are a network interface built into a database server motherboard, as a network interface connected to an expansion slot on a database server, or any known or convenient manner. In some embodiments a database server is able to send a multicast message. [0050] FIG. 2A depicts an example of a system 200 including an access point (AP), a server and a plurality of clients grouped into subsets. In the example of FIG. 2A, the system 200 is graphically depicted including an AP 202 coupled to a server 204, and clients 206-1, 206-2, 206-3, 206-4, and 206-5 (collectively referred to as clients 206). The server 204 may be configured similarly to the server 104 (FIG. 1). [0051] In the example FIG. 2A, in operation, the AP 202 receives a multicast message to be transmitted to one or more of the clients 206. The multicast message can come from any source including the server 204, the clients 206, or some other source. In an embodiment, the AP 202 can buffer multicast messages. In an embodiment, the AP 202 uses attributes of the associated clients to create subsets of clients (Attribute 1, Attribute 2, Attribute 3). One or more of the clients 206 may be capable of entering a powersave mode. The multicast message is buffered for clients in the subset in which a member is in powersave mode but the multicast message is delivered to any subset without a member in powersave mode. [0052] In the example of FIG. 2A, the AP 202 can communicate with a clients 206. Clients 206 are any device capable of communicating with AP 202. Examples of possible clients, as way of example and not as a limitation, include desktop computers, notebook computers, PDAs, phones, barcode scanners, dedicated hardware systems, proprietary hardware systems, etc. Other examples of possible clients are described in reference to the computer 106, the phone 110, the PDA 114, and the computer 118 above (FIG. 1). [0053] In an embodiment, an AP may be associated with zero, one, or a plurality of clients. In a further embodiment the number of clients associated with an AP changes dynamically as clients connect and disconnect from the AP, thereby making the clients associate and disassociated with the AP. [0054] FIG. 2B depicts an example of a system 200 including an AP 202, a server 204 and a plurality of clients 206-1, 206-2, 206-3, 206-4, 206-5 (collectively referred to as clients 206), wherein the clients are grouped into subsets by their virtual local area network (VLAN). In the example FIG. 2B, the system 200 graphically depicts the use of the VLAN of the clients 206 to create subsets of clients (VLAN 1 and VLAN 2). In the example FIG. 2B, the associated clients 206 are divided into two subsets based which VLAN a particular clients is a member. [0055] An example of a VLAN is a logically independent network which does not depend on the physical layout of a network. An example VLAN configuration consists of a network of computers that behave as if physically contained on the same LAN. Network administrators configure VLANs through software rather than hardware, which in some cases makes them extremely flexible. In an embodiment, a user connected to a VLAN could move to another location, but remain on the same VLAN without the need for hardware reconfiguration. An example of a standard implementing VLANs but not meant to be a limitation is IEEE 802.1Q. [0056] In the example in FIG. 2B, the clients 206 associated with the AP 202 belong to two separate VLANS, VLAN 1 and VLAN 2. The clients 206-1 and 206-2 are members of the VLAN 1, while the clients 206-3, 206-4, and 206-5 are members of the VLAN 2. [0057] In some embodiments, a particular VLAN may have more members than those connected to an AP because the VLAN may not depend on physical implementation. In other embodiments all members of a VLAN are associated with an AP. [0058] In an example embodiment a client or a plurality of clients are able to enter powersave mode. An AP is dynamically able to detect when an associated client enters powersave mode or is dynamically notified by the client when the client enters powersave mode. The AP may be configured to buffer multicast data received and to be transmitted to a client in powersave mode which is a member of the VLAN which the multicast data is to be sent. [0059] FIG. 2C depicts an example of a system 200 including an access point, a server and a plurality of clients, wherein the clients are grouped into subsets by their service set identifier (SSID). In the example FIG. 2C, a system 200 graphically depicts the use of the SSIDs of the clients to create a subset of clients. In the example FIG. 2C, the associated clients 206 are divided into three subsets based on SSID. [0060] In a non-limiting embodiment, an SSID is an identifier for members of a wireless network. In a non-limiting embodiment, the SSID is required in transmissions for the client to access the network. In some implementations, if a client is unable to provide the correct SSID the client will be unable to join the wireless network. [0061] In the example of FIG. 2C, the clients 206 associated with the AP 202 have three separate SSIDs, SSID 1, SSID 2, and SSID 3. For illustrative purposes only, the clients 206-1 and 206-2 are members of SSID 1, the client 206-3 is a member of SSID 2, and the clients 206-4 and 206-5 are members of the SSID 3. [0062] In some embodiment a particular SSID may have more members then those connected to an AP. In other embodiments all clients with a particular SSID are associated with an AP. [0063] In one example embodiment a client or a plurality of clients are able to enter powersave mode. An AP is dynamically able to detect when an associated client enters powersave mode or is dynamically notified by the client when the client enters powersave mode. The AP is configured to buffer multicast data received and to be transmitted to a SSID that includes a client in powersave mode. [0064] FIG. 2D depicts an example of a system 200 including an access point, a server and a plurality of clients, wherein the clients are grouped into subsets by their encryption method. The example of FIG. 2D is intended to graphically depict clients divided into subsets based on an associated encryption method. In the example of FIG. 2D, not using encryption is treated as an “encryption method.”
[0065] Encryption is the modifying of information into a secure format. In some example encryption methods a key is required to decrypt the information. Many different types of encryption methods may be used to communicate between a server and clients and the client's encryption method may be used to divide clients into subsets. Some example encryption methods are WEP, WPA, TKIP, etc. [0066] In the example of FIG. 2D, the clients 206-1 and 206-2 are grouped into a subset for no encryption, the clients 206-3 and 206-3 are grouped in a subset for WEP encryption method, and the client 206-5 is in a subset for the TKIP encryption method. In short, the encryption method can be used to group the clients into subsets. [0067] There are numerous encryption methods and any encryption method known or convenient may be used to create subsets of clients. Example encryption methods not meant as limitations include codes, ciphers, a combination of code and cipher, symmetric key algorithms, and asymmetric key algorithms. [0068] In one example embodiment a client or a plurality of clients are able to enter powersave mode. An AP is dynamically able to detect when an associated client enters powersave mode or is dynamically notified by the client when the client enters powersave mode. The AP is configured to buffer multicast data received and to be transmitted to a subset in which those using a particular encryption method in which a client in powersave mode. [0069] FIG. 3 depicts an example of a system 300 including an access point, a server, a switch, and a plurality of clients, wherein the switch can configure the AP. In the example of FIG. 3 a possible embodiment of the invention is shown including an access point (AP) 302, a server 310 coupled to a switch 308, and clients 306-1, 306-2, 306-3, 306-4, 306-5 (collectively referred to as clients 306) [0070] The AP 302 is similar to the AP described above in reference to AP 102 (FIG. 1). The clients 306 are similar to those described above in reference to Clients 206 (FIG. 2A). The server 310 and switch 308 are coupled which may be accomplished in any wired or wireless means known and convenient. [0071] In some embodiments, a server is connected to a plurality of APs, devices and/or networks. In further possible embodiments a server and a switch are included on the same physical device and any division is logical in nature only. [0072] In an example embodiment a server could be a remote authentication dial in user service (“RADIUS”) server. In an example embodiment a switch could be a Mobility Exchange (“MX”) switch. In certain embodiments the switch may be connected to a plurality of RADIUS or other servers and/or a plurality of APs. [0073] In some embodiments the switch 308 is capable of some level of control and/or configuration of an AP. In other embodiments the switch 308 is connected to multiple APs and can track the movement of clients from one AP to another. [0074] FIG. 4 depicts an example of an access point for use in a system such as that described by way of example but not limitation with reference to FIGS. 1-3. FIG. 4 is an example embodiment of an access point 402 and includes memory 404, a server communication port 412, a network interface 414, and a processor 418. The memory 404 includes a database 406, a buffering module 408, and buffer data 410. [0075] In the example of FIG. 4, the memory 404 can be any known or convenient type of memory which is capable of holding a database, program modules, and data. The memory 404 is coupled to the processor 418 capable of accessing the database 406, the buffering module 408 and other data contained in the memory 404. Examples of types of memory include cache, main memory and secondary storage or a combination thereof. In an alternative non-limiting embodiment, one or more of the database 406, the buffering module 408, and the buffer data 410 may be stored in firmware or hardware. [0076] In certain embodiments a database, buffering module, buffer data or other data stored in a memory may be stored in a combination of memory types such as main memory and secondary storage. The structure of the stored data will be specific to the implementation and the state of an AP. [0077] In the example FIG. 4, the database 406 stores powersave attributes for a plurality of clients associated with the AP 402. The database 406 may be implemented in any way known or convenient, and some examples of databases not meant as limitations include relational, file based, or object oriented. [0078] In certain embodiments a database is further configured to store one or more attributes of clients associated with the AP 402 in addition to the powersave attributes. Some example attributes a database may be configured to store include by way of example but not limitation a VLAN attribute, a SSID attribute, or an encryption method attribute. [0079] In some embodiments a database is updated with the powersave modes of clients associated with an AP. The associated clients may automatically broadcast their powersave state to the AP, notifying the AP if entering powersave mode or leaving powersave mode. In certain embodiments, after these broadcast transmissions are received by an AP the information is updated in the database. Alternatively, the clients can unicast or multicast their powersave state to, for example, a particular AP, server, or some other location. [0080] In the example of FIG. 4, the buffering module 408 is configured to use the powersave attributes of clients stored in the database 406 to determine whether to buffer received multicast messages. The buffering module 408 uses the attributes of associated clients stored in the database 406 to create a subset of clients to which the multicast message is to be transmitted. The buffering module 408 associates a multicast message with a subset of clients. In an embodiment, the buffering module 408 is configured to buffer the multicast message in the buffer data 410 when at least one client of the subset of the clients is in a powersave state. [0081] In the example of FIG. 4, the buffering module 408 is capable of receiving multicast messages from the server communication port 412. The buffering module 408 is able to determine if there is a client in the subset, designated by the multicast packet, that is in a powersave state. The buffering module 408 maybe configured to associate clients into sets in any manner known or convenient. For example, clients may be divided into subsets using one or more of the following attributes of the clients, the VLAN to which the client belongs, the SSID of the client, the encryption method used by the client, etc. [0082] In some embodiments a buffering module associates the multicast message with a subset of clients using one or more of the following attributes of the clients, a VLAN attributes, a SSID attributes or an encryption method attributes. If a multicast message is sent to the subset of clients and a member is in a powersave state the multicast message is buffered by the buffering module in a buffer data. In further embodiments when DTIM is reached a buffer data is read and any multicast messages are transmitted. [0083] In some embodiments a multicast message is already associated with a subset when received by an AP and a buffering module uses the associations in determining when to buffer multicast messages. [0084] In the example FIG. 4, the buffer data 410 is contained in memory 404 and stores multicast messages buffered by the buffering module 408. The buffer data 410 may be in any form known or convenient. An example implementation not meant as a limitation is a stack in the memory 404. [0085] In other embodiments, associating a multicast message with a subset is done prior to the multicast message being received by an AP. In this embodiment a server may, for example, associate the multicast message with a client subset before sending the multicast message. The AP may determine if any member in the subset is in a powersave state. In another embodiment, the multicast data is associated with clients by both a server and an AP. [0086] In certain embodiments, a buffering module is configured to determine which attributes are used to group the client set into subsets. The methodology used by the buffering module in determining attributes to create subsets may be user configurable, statically defined, or determined through logic in the AP. [0087] In the example of FIG. 4, the AP 402 includes the server communication port 412, which is capable of communicating with a server. The server communication port 412 is able to communicate with the server in any method known or convenient. The communication port 412 may use any combination of communication technology such as wireless, wired, dedicated hardwiring, through a LAN, etc. [0088] In the example of FIG. 4, the AP 402 includes a network interface 414 capable of communicating with a client or a plurality of clients. The network interface 412 is a communication port capable of communicating with the clients. Network interface 412 may use any combination of communication technology such as wireless, wired, dedicated hardwiring, etc. [0089] In certain embodiments a network interface is a communication port capable of communicating with clients and is a wireless radio capable of two way communication with a client. In a further embodiment a network interface is a wireless radio and the wireless radio is configured to use an IEEE 802.11 wireless communication standard. [0090] In certain embodiments a server communication port and a network interface are one physical communication port capable of communicating with both a plurality of clients and a server. In another embodiment a server communication port and a network interface are two separate communication ports. [0091] In the example of FIG. 4, the processor 416 may be any known or convenient processor, including by way of example but not limitation, a general processor, a dedicated processor, or a combination of processors. The processor is coupled to the memory 404 and can access the database 406 and execute the buffering module 408 in the memory 404. [0092] In certain embodiments an AP has multiple processors working in parallel. The processors can be on the same physical machine or distributed across multiple machines. [0093] FIG. 5A depicts a flowchart 500A of an example of a method for buffering multicast messages. This method and other methods are depicted as serially arranged modules. However, modules of the methods may be reordered, or arranged for parallel execution as appropriate. FIG. SA is intended to illustrate a first example of operation of a system, such as that depicted in FIG. 2A, using techniques described herein. The flowchart 500A proceeds from the point from which a multicast message is received to the point that it is sent to intended clients. However, it should be noted that the method of FIG. 5A is not intended to be limited to the components depicted in FIG. 2A, and may be applicable to other systems and configurations. [0094] In the example of FIG. 5A, in block 502 a multicast message is received. The multicast message may be received at, by way of example but not limitation, an AP or some other intermediary to a plurality of clients. The multicast message may be sent from, by way of example but not limitation, a server. The transmission of the multicast messages may be done in any way known or convenient. [0095] In the example of FIG. 5A, in block 504 the multicast message is associated with a subset of clients. Depending on the composition of the clients, the subset of clients may be in some situations equal to the set of clients. The multicast message may originate from one of the clients, or from some other source. [0096] In a non-limiting embodiment, a server associates the multicast message with a subset of clients before the multicast message is received by, for example, an AP. In this embodiment the AP determines whether any clients in the set are in a powersave state. In another embodiment, the, e.g., AP and the, e.g., server may both associate the multicast message with a set of the clients and the resulting set used being the intersection of two or more subsets. [0097] In the example of FIG. 5A, at decision point 506 it is determined if one or more of the clients in the subset of clients are in a powersave state. For example, an AP may check whether the clients are in a powersave state and determine if any of these are included in a subset of clients. [0098] In a possible embodiment, the, e.g., AP may update the powersave state of clients in real-time as described above with reference to FIGS. 2A to 2D. In some embodiments, not all clients are able to enter a powersave state. In some embodiments a client enters a powersave state automatically when certain conditions are met such as the client has not been used for a certain period of time or the client is almost out of battery life. In some embodiments a client may be manually asked to enter a powersave state. [0099] In the example of FIG. 5A, if none of the clients in the subset are in a powersave state (506-N) then at block 508 the multicast message is sent to the clients associated with the subset. [0100] In the example of FIG. 5A, if one or more of the clients in the subset are in a powersave state (506-Y), then at block 510 the multicast message is buffered. The buffered data may include multicast messages for multiple client subsets from multiple sources. Each multicast message may be associated with a different DTIM or alternatively all may use the same DTIM to determine when to send the buffered multicast message to the clients in the subset. [0101] In the example of FIG. 5A, at block 512 the multicast message is buffered when an intended recipient is a member of a subset in which the intended recipient and/or another member of the subset is in a powersave state. [0102] In another possible embodiment, multicast messages are buffered automatically regardless of the powersave state of members in the subset. In other possible embodiments the multicast messages are buffered in other forms besides a stack such as a queue, randomly, placed at earliest open spot, etc. [0103] In the example of FIG. 5A, the buffered message is then sent when DTIM is reached. Clients in a powersave state enter a non-powersave state to receive buffered multicast messages. [0104] In the example of FIG. 5A, the buffer is then purged of the sent multicast data. This is only one possible embodiment and the data could be retained in memory or some other location if convenient. A possible example not meant as a limitation would be to back-up the data for security or reasons. [0105] FIG. 5B depicts a flowchart 500B of an example of a method for buffering multicast messages using client VLAN attributes. In the example of FIG. 5B, the flowchart 500B depicts a method that uses the VLAN associated with the client to determine which clients with which to associate the multicast message. FIG. 5B is intended to illustrate an example of operation of a system such as that depicted in FIGS. 2A and/or 2B, using the techniques described herein. The blocks and decision points of the flowchart 500B are similar to those of the flowchart 500A and are, therefore, not described at length. [0106] In the example of FIG. 5B the flowchart 500B begins at block 522 where a multicast message is received. At block 524, the multicast message is associated with a VLAN. Each VLAN may include clients that may be referred to as a subset of all clients. It may be desirable to characterize the subset of clients as the clients associated with the VLAN that are connected to a network at an AP. If, at decision point 526, none of the clients of the VLAN that are connected to the network at the AP are in a powersave state, then the multicast message is sent at block 528. Otherwise, the multicast message is added to the buffer at block 530 and the buffered message is sent at DTIM at block 532. [0107] FIG. 6 depicts a flowchart 600 of an example of a method for buffering multicast packets. The example of FIG. 6 depicts a method for buffering multicast packets. FIG. 6 is intended to illustrate a second example method of operation of a system such as that depicted in FIGS. 2A-2D, using the techniques described herein. [0108] In the example of FIG. 6, a flowchart 600 graphically depicts an example flow of information in a sample embodiment. The flowchart 600 starts at block 602 when a multicast packet is received. The multicast packet may be received by, by way of example but not limitation, an AP or other intermediary between the source and one or more of the intended recipients. The multicast packet will typically have header information including data that can be used to identify the packet as a multicast packet. [0109] In some embodiments an AP may at times continuously or nearly continuously receive packets from different sources including but not limited to clients and a server. In certain embodiments an AP receives packets from sources originating from a LAN, internet, or intranet. In some examples an AP receives a mix of unicast and multicast packets. [0110] In the example of FIG. 6, the flowchart 600 continues at block 604 where the multicast packet is associated with a subset of clients. The clients may be associated with the multicast packets at, by way of example but not limitation, an AP, a server, and/or some other location. Depending on the composition of the clients associated with, e.g., an AP the subset of clients may be equal to the set of clients. [0111] In the example of FIG. 6, the flowchart 600 continues at decision point 606 where it is determined whether any of the clients connected to a network via, e.g., an AP, are in a powersave state. If none of the subset of clients associated with the multicast packet are in a powersave state (606-N), the multicast packet is transmitted to the client(s) at block 608 and the flowchart 600 ends. Otherwise (606-Y), the flowchart 600 continues at block 610 where the packet is added to a buffer. [0112] In the example of FIG. 6, the flowchart 600 continues at decision point 612 where it is determined whether DTIM has been reached. If DTIM has not been reached (612-N), then the flowchart 600 continues at decision point 614 where it is determined whether another multicast packet has been received. If another multicast packet has been received (614-Y), then the flowchart 600 returns to block 602. If another multicast packet has not been received (614-N), then the flowchart 600 returns to decision point 612. These blocks and decision points are repeated until DTIM is reached (612-Y). [0113] After DTIM is reached, the flowchart 600 continues at block 616 where all buffered multicast packets are sent to the intended recipients connected to the network via, e.g., the AP. The flowchart 600 continues at optional block 618 where the buffer is purged. Block 618 is optional because in some cases it may be desirable to retain the buffer to, for example, send again later if no acknowledgement is received. In many embodiments, no acknowledgement from the clients is required. In other possible embodiments, the buffered multicast data may be retained in part or in total in memory or some other location if convenient. [0114] The term “powersave mode” has been used to mean the process of a client entering a state of reduced energy expenditure and includes turning off the client's communication port. The term “powersave state” has been used to mean a general term describing any state a client may be in which conserves energy. In the powersave state the client may or may not have disabled the client's communication port. [0115] The term “data” has been used to mean any digital information. The term “transmission” has been used to indicate any flow of data from one device to another. The term “intended recipient” has been used to apply to a client which was intended to receive a transmission. The term “communication port” has been used to describe any device allowing communication of data with another device. [0116] As used herein, the term “embodiment” means an embodiment that serves to illustrate by way of example but not limitation. [0117] It will be appreciated to those skilled in the art that the preceding examples and embodiments are exemplary and not limiting to the scope of the present invention. It is intended that all permutations, enhancements, equivalents, and improvements thereto that are apparent to those skilled in the art upon a reading of the specification and a study of the drawings are included within the true spirit and scope of the present invention. It is therefore intended that the following appended claims include all such modifications, permutations and equivalents as fall within the true spirit and scope of the present invention. Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3641433 *Jun 9, 1969Feb 8, 1972Us Air ForceTransmitted reference synchronization systemUS4247908 *Dec 8, 1978Jan 27, 1981Motorola, Inc.Re-linked portable data terminal controller systemUS4460120 *Aug 1, 1983Jul 17, 1984Symbol Technologies, Inc.Narrow bodied, single- and twin-windowed portable laser scanning head for reading bar code symbolsUS4494238 *Jun 30, 1982Jan 15, 1985Motorola, Inc.Multiple channel data link systemUS4500987 *Nov 23, 1982Feb 19, 1985Nippon Electric Co., Ltd.Loop transmission systemUS4503533 *Aug 20, 1981Mar 5, 1985Stanford UniversityLocal area communication network utilizing a round robin access scheme with improved channel utilizationUS4635221 *Jan 18, 1985Jan 6, 1987Allied CorporationFrequency multiplexed convolver communication systemUS4639914 *Dec 6, 1984Jan 27, 1987At&T Bell LaboratoriesWireless PBX/LAN system with optimum combiningUS4644523 *Mar 23, 1984Feb 17, 1987Sangamo Weston, Inc.System for improving signal-to-noise ratio in a direct sequence spread spectrum signal receiverUS4672658 *Oct 23, 1986Jun 9, 1987At&T Company And At&T Bell LaboratoriesSpread spectrum wireless PBXUS4673805 *Aug 1, 1983Jun 16, 1987Symbol Technologies, Inc.Narrow-bodied, single- and twin-windowed portable scanning head for reading bar code symbolsUS4730340 *Oct 31, 1980Mar 8, 1988Harris Corp.Programmable time invariant coherent spread symbol correlatorUS4736095 *Feb 20, 1986Apr 5, 1988Symbol Technologies, Inc.Narrow-bodied, single- and twin-windowed portable laser scanning head for reading bar code symbolsUS4740792 *Aug 27, 1986Apr 26, 1988Hughes Aircraft CompanyVehicle location systemUS4758717 *Jul 10, 1986Jul 19, 1988Symbol Technologies, Inc.Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbolsUS4760586 *Dec 27, 1985Jul 26, 1988Kyocera CorporationSpread spectrum communication systemUS4829540 *Oct 29, 1987May 9, 1989Fairchild Weston Systems, Inc.Secure communication system for multiple remote unitsUS4850009 *May 31, 1988Jul 18, 1989Clinicom IncorporatedPortable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications stationUS4894842 *Oct 15, 1987Jan 16, 1990The Charles Stark Draper Laboratory, Inc.Precorrelation digital spread spectrum receiverUS4933952 *Apr 4, 1989Jun 12, 1990Lmt RadioprofessionnelleAsynchronous digital correlator and demodulators including a correlator of this typeUS4933953 *Sep 1, 1988Jun 12, 1990Kabushiki Kaisha KenwoodInitial synchronization in spread spectrum receiverUS5008899 *Jun 29, 1990Apr 16, 1991Futaba Denshi Kogyo Kabushiki KaishaReceiver for spectrum spread communicationUS5029183 *Jun 29, 1989Jul 2, 1991Symbol Technologies, Inc.Packet data communication networkUS5103459 *Jun 25, 1990Apr 7, 1992Qualcomm IncorporatedSystem and method for generating signal waveforms in a cdma cellular telephone systemUS5103461 *Dec 19, 1990Apr 7, 1992Symbol Technologies, Inc.Signal quality measure in packet data communicationUS5109390 *Nov 7, 1989Apr 28, 1992Qualcomm IncorporatedDiversity receiver in a cdma cellular telephone systemUS5187575 *Dec 29, 1989Feb 16, 1993Massachusetts Institute Of TechnologySource adaptive television systemUS5208629 *Apr 3, 1992May 4, 1993Nippon Telegraph & Telephone CorporationOptical projection exposure method and system using the sameUS5231633 *Jul 11, 1990Jul 27, 1993Codex CorporationMethod for prioritizing, selectively discarding, and multiplexing differing traffic type fast packetsUS5280498 *Nov 27, 1991Jan 18, 1994Symbol Technologies, Inc.Packet data communication systemUS5285494 *Jul 31, 1992Feb 8, 1994Pactel CorporationNetwork management systemUS5329531 *Jun 18, 1993Jul 12, 1994Ncr CorporationMethod of accessing a communication mediumUS5418812 *Jun 26, 1992May 23, 1995Symbol Technologies, Inc.Radio network initialization method and apparatusUS5483676 *Feb 2, 1994Jan 9, 1996Norand CorporationMobile radio data communication system and methodUS5488569 *Dec 20, 1993Jan 30, 1996At&T Corp.Application-oriented telecommunication system interfaceUS5491644 *Sep 7, 1993Feb 13, 1996Georgia Tech Research CorporationCell engineering tool and methodsUS5517495 *Dec 6, 1994May 14, 1996At&T Corp.Fair prioritized scheduling in an input-buffered switchUS5519762 *Dec 21, 1994May 21, 1996At&T Corp.Adaptive power cycling for a cordless telephoneUS5528621 *Apr 8, 1993Jun 18, 1996Symbol Technologies, Inc.Packet data communication systemUS5598532 *Oct 21, 1993Jan 28, 1997Optimal NetworksMethod and apparatus for optimizing computer networksUS5630207 *Jun 19, 1995May 13, 1997Lucent Technologies Inc.Methods and apparatus for bandwidth reduction in a two-way paging systemUS5640414 *Apr 11, 1994Jun 17, 1997Qualcomm IncorporatedMobile station assisted soft handoff in a CDMA cellular communications systemUS5649289 *Jul 10, 1995Jul 15, 1997Motorola, Inc.Flexible mobility management in a two-way messaging system and method thereforUS5872968 *Apr 3, 1997Feb 16, 1999International Business Machines CorporationData processing network with boot process using multiple serversUS5875179 *Oct 29, 1996Feb 23, 1999Proxim, Inc.Method and apparatus for synchronized communication over wireless backbone architectureUS5896561 *Dec 23, 1996Apr 20, 1999Intermec Ip Corp.Communication network having a dormant polling protocolUS5915214 *Feb 23, 1995Jun 22, 1999Reece; Richard W.Mobile communication service provider selection systemUS5920821 *Dec 4, 1995Jul 6, 1999Bell Atlantic Network Services, Inc.Use of cellular digital packet data (CDPD) communications to convey system identification list data to roaming cellular subscriber stationsUS6011784 *Dec 18, 1996Jan 4, 2000Motorola, Inc.Communication system and method using asynchronous and isochronous spectrum for voice and dataUS6078568 *Feb 25, 1997Jun 20, 2000Telefonaktiebolaget Lm EricssonMultiple access communication network with dynamic access controlUS6088591 *Jun 28, 1996Jul 11, 2000Aironet Wireless Communications, Inc.Cellular system hand-off protocolUS6188649 *Oct 19, 1999Feb 13, 2001Matsushita Electric Industrial Co., Ltd.Method for reading magnetic super resolution type magneto-optical recording mediumUS6199032 *Jul 22, 1998Mar 6, 2001Edx Engineering, Inc.Presenting an output signal generated by a receiving device in a simulated communication systemUS6208841 *May 3, 1999Mar 27, 2001Qualcomm IncorporatedEnvironmental simulator for a wireless communication deviceUS6218930 *Mar 7, 2000Apr 17, 2001Merlot CommunicationsApparatus and method for remotely powering access equipment over a 10/100 switched ethernet networkUS6240078 *Aug 13, 1998May 29, 2001Nec Usa, Inc.ATM switching architecture for a wireless telecommunications networkUS6240083 *Feb 25, 1997May 29, 2001Telefonaktiebolaget L.M. EricssonMultiple access communication network with combined contention and reservation mode accessUS6256300 *Apr 11, 2000Jul 3, 2001Lucent Technologies Inc.Mobility management for a multimedia mobile networkUS6256334 *Sep 22, 1997Jul 3, 2001Fujitsu LimitedBase station apparatus for radiocommunication network, method of controlling communication across radiocommunication network, radiocommunication network system, and radio terminal apparatusUS6336035 *Nov 19, 1998Jan 1, 2002Nortel Networks LimitedTools for wireless network planningUS6336152 *Oct 4, 1999Jan 1, 2002Microsoft CorporationMethod for automatically configuring devices including a network adapter without manual intervention and without prior configuration informationUS6347091 *Nov 6, 1998Feb 12, 2002Telefonaktiebolaget Lm Ericsson (Publ)Method and apparatus for dynamically adapting a connection state in a mobile communications systemUS6356758 *Dec 31, 1997Mar 12, 2002Nortel Networks LimitedWireless tools for data manipulation and visualizationUS6393290 *Jun 30, 1999May 21, 2002Lucent Technologies Inc.Cost based model for wireless architectureUS6404772 *Jul 27, 2000Jun 11, 2002Symbol Technologies, Inc.Voice and data wireless communications network and methodUS6512916 *Aug 10, 2000Jan 28, 2003America Connect, Inc.Method for selecting markets in which to deploy fixed wireless communication systemsUS6580700 *Dec 29, 1998Jun 17, 2003Symbol Technologies, Inc.Data rate algorithms for use in wireless local area networksUS6587680 *Nov 23, 1999Jul 1, 2003Nokia CorporationTransfer of security association during a mobile terminal handoverUS6687498 *Jan 8, 2001Feb 3, 2004Vesuvius Inc.Communique system with noncontiguous communique coverage areas in cellular communication networksUS6725260 *May 10, 2000Apr 20, 2004L.V. Partners, L.P.Method and apparatus for configuring configurable equipment with configuration information received from a remote locationUS6725454 *Aug 21, 2000Apr 20, 2004International Business Machines CorporationMethod and apparatus for capacity consumption profiling in a client/server environmentUS6747961 *Apr 11, 2000Jun 8, 2004Lucent Technologies Inc.Mobility management for a multimedia mobile networkUS6839338 *Mar 20, 2002Jan 4, 2005Utstarcom IncorporatedMethod to provide dynamic internet protocol security policy serviceUS6839348 *Apr 30, 1999Jan 4, 2005Cisco Technology, Inc.System and method for distributing multicasts in virtual local area networksUS6879812 *Sep 17, 2002Apr 12, 2005Networks Associates Technology Inc.Portable computing device and associated method for analyzing a wireless local area networkUS7020773 *Jul 17, 2000Mar 28, 2006Citrix Systems, Inc.Strong mutual authentication of devicesUS7324468 *Feb 2, 2004Jan 29, 2008Broadcom CorporationSystem and method for medium access control in a power-save networkUS7489648 *Mar 11, 2004Feb 10, 2009Cisco Technology, Inc.Optimizing 802.11 power-save for VLANUS20020052205 *Jan 26, 2001May 2, 2002Vyyo, Ltd.Quality of service scheduling scheme for a broadband wireless access systemUS20020068278 *Dec 17, 1998Jun 6, 2002Klaus GieseMetastatic breast and colon cancer regulated genesUS20020095486 *Jan 12, 2001Jul 18, 2002Paramvir BahlSystems and methods for locating mobile computer users in a wireless networkUS20030014646 *Jul 3, 2002Jan 16, 2003Buddhikot Milind M.Scheme for authentication and dynamic key exchangeUS20030018889 *Sep 20, 2001Jan 23, 2003Burnett Keith L.Automated establishment of addressability of a network device for a target network enviromentUS20030107590 *Nov 6, 2002Jun 12, 2003Phillippe LevillainPolicy rule management for QoS provisioningUS20040025044 *Jul 30, 2002Feb 5, 2004Day Christopher W.Intrusion detection systemUS20040047320 *Sep 9, 2002Mar 11, 2004Siemens Canada LimitedWireless local area network with clients having extended freedom of movementUS20040064560 *Sep 26, 2002Apr 1, 2004Cisco Technology, Inc., A California CorporationPer user per service traffic provisioningUS20040095914 *May 27, 2003May 20, 2004Toshiba America Research, Inc.Quality of service (QoS) assurance system using data transmission controlUS20040095932 *Nov 7, 2003May 20, 2004Toshiba America Information Systems, Inc.Method for SIP - mobility and mobile - IP coexistenceUS20040120370 *Aug 7, 2003Jun 24, 2004Agilent Technologies, Inc.Mounting arrangement for high-frequency electro-optical componentsUS20050030929 *Jul 8, 2004Feb 10, 2005Highwall Technologies, LlcDevice and method for detecting unauthorized, "rogue" wireless LAN access pointsUS20050058132 *Oct 5, 2004Mar 17, 2005Fujitsu LimitedNetwork repeater apparatus, network repeater method and network repeater programUS20050059405 *Sep 17, 2003Mar 17, 2005Trapeze Networks, Inc.Simulation driven wireless LAN planningUS20050059406 *Sep 17, 2003Mar 17, 2005Trapeze Networks, Inc.Wireless LAN measurement feedbackUS20050064873 *Jun 24, 2004Mar 24, 2005Jeyhan KaraoguzAutomatic quality of service based resource allocationUS20050068925 *Sep 12, 2003Mar 31, 2005Stephen PalmWireless access point setup and management within wireless local area networkUS20050073980 *Sep 17, 2003Apr 7, 2005Trapeze Networks, Inc.Wireless LAN managementUS20050128989 *Oct 15, 2004Jun 16, 2005Airtight Networks, IncMethod and system for monitoring a selected region of an airspace associated with local area networks of computing devicesUS20060045050 *Nov 10, 2004Mar 2, 2006Andreas FlorosMethod and system for a quality of service mechanism for a wireless network* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7724703Jan 14, 2006May 25, 2010Belden, Inc.System and method for wireless network monitoringUS7724704Jul 17, 2006May 25, 2010Beiden Inc.Wireless VLAN system and methodUS7865713Dec 28, 2007Jan 4, 2011Trapeze Networks, Inc.Application-aware wireless network system and methodUS7912982Nov 22, 2006Mar 22, 2011Trapeze Networks, Inc.Wireless routing selection system and methodUS8064939Jun 24, 2009Nov 22, 2011Juniper Networks, Inc.Wireless load balancingUS8072952Oct 16, 2007Dec 6, 2011Juniper Networks, Inc.Load balancingUS8116275May 21, 2010Feb 14, 2012Trapeze Networks, Inc.System and network for wireless network monitoringUS8150357Mar 28, 2008Apr 3, 2012Trapeze Networks, Inc.Smoothing filter for irregular update intervalsUS8161278Mar 10, 2009Apr 17, 2012Trapeze Networks, Inc.System and method for distributing keys in a wireless networkUS8218449Jul 9, 2009Jul 10, 2012Trapeze Networks, Inc.System and method for remote monitoring in a wireless networkUS8238298Sep 15, 2008Aug 7, 2012Trapeze Networks, Inc.Picking an optimal channel for an access point in a wireless networkUS8238942Nov 21, 2007Aug 7, 2012Trapeze Networks, Inc.Wireless station location detectionUS8270408Jun 22, 2009Sep 18, 2012Trapeze Networks, Inc.Identity-based networkingUS8320949Oct 13, 2011Nov 27, 2012Juniper Networks, Inc.Wireless load balancing across bandsUS8340110Aug 24, 2007Dec 25, 2012Trapeze Networks, Inc.Quality of service provisioning for wireless networksUS8446890Nov 4, 2011May 21, 2013Juniper Networks, Inc.Load balancingUS8457031Jan 11, 2006Jun 4, 2013Trapeze Networks, Inc.System and method for reliable multicastUS8474023May 30, 2008Jun 25, 2013Juniper Networks, Inc.Proactive credential cachingUS8514827Feb 14, 2012Aug 20, 2013Trapeze Networks, Inc.System and network for wireless network monitoringUS8635444Apr 16, 2012Jan 21, 2014Trapeze Networks, Inc.System and method for distributing keys in a wireless networkUS8638762Feb 8, 2006Jan 28, 2014Trapeze Networks, Inc.System and method for network integrityUS8670383Jan 14, 2011Mar 11, 2014Trapeze Networks, Inc.System and method for aggregation and queuing in a wireless networkUS8787229 *Feb 8, 2010Jul 22, 2014Ntt Docomo, Inc.Mobile terminal and mobile terminal data relay methodUS8818322May 11, 2007Aug 26, 2014Trapeze Networks, Inc.Untethered access point mesh system and methodUS8902904Sep 7, 2007Dec 2, 2014Trapeze Networks, Inc.Network assignment based on priorityUS8964747Feb 12, 2009Feb 24, 2015Trapeze Networks, Inc.System and method for restricting network access using forwarding databasesUS8966018Jan 6, 2010Feb 24, 2015Trapeze Networks, Inc.Automated network device configuration and network deploymentUS8978105Dec 16, 2008Mar 10, 2015Trapeze Networks, Inc.Affirming network relationships and resource access via related networksUS9055037 *Jun 10, 2013Jun 9, 2015Lemi Technology, LlcProtected distribution and location based aggregation serviceUS9191799Nov 10, 2006Nov 17, 2015Juniper Networks, Inc.Sharing data between wireless switches system and methodUS9258702Jun 11, 2007Feb 9, 2016Trapeze Networks, Inc.AP-local dynamic switchingUS9326144 *Feb 21, 2013Apr 26, 2016Fortinet, Inc.Restricting broadcast and multicast traffic in a wireless network to a VLANUS9531566 *Jul 1, 2011Dec 27, 2016Nec CorporationControl apparatus, a communication system, a communication method and a recording medium having recorded thereon a communication program including a control unit, a network configuration information management unit, and a path control unitUS20090274060 *Jul 9, 2009Nov 5, 2009Trapeze Networks, Inc.System and method for remote monitoring in a wireless networkUS20090323531 *Jun 24, 2009Dec 31, 2009Trapeze Networks, Inc.Wireless load balancingUS20110292864 *Feb 8, 2010Dec 1, 2011Ntt Docomo, Inc.Mobile terminal and mobile terminal data relay methodUS20130144995 *Jul 1, 2011Jun 6, 2013Shuji IshiiControl apparatus, a communication system, a communication method and a recording medium having recorded thereon a communication programUS20130283036 *Jun 10, 2013Oct 24, 2013Lemi Technology, LlcProtected Distribution And Location Based Aggregation ServiceUS20140233734 *Feb 21, 2013Aug 21, 2014Meru NetworksRestricting broadcast and multicast traffic in a wireless network to a vlanUS20170111817 *Aug 25, 2015Apr 20, 2017Telefonaktiebolaget Lm Ericsson (Publ)Multi-User Packet Transmission, Clustering and/or Scheduling In A Wireless Local Area NetworkCN101835102A *May 19, 2010Sep 15, 2010迈普通信技术股份有限公司Queue management method for wireless local area network and wireless access equipment* Cited by examinerClassifications U.S. Classification709/223International ClassificationG06F15/173Cooperative ClassificationY02B60/50, H04W52/0219, H04W52/0216, H04W88/08, H04L12/1863, H04L12/189European ClassificationH04L12/18WLegal EventsDateCodeEventDescriptionJul 28, 2006ASAssignmentOwner name: TRAPEZE NETWORKS, INC., CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MORAIN, GARY EUGENE;REEL/FRAME:018018/0541Effective date: 20060725RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services