Source: http://www.google.ca/patents/US9019884
Timestamp: 2017-12-17 21:51:43
Document Index: 55949719

Matched Legal Cases: ['Application No. 08162639', 'Application No. 08162639', 'Application No. 11', 'Application No. 08162639', 'Application No. 08162615', 'Application No. 11160318', 'Application No. 08162639', 'Application No. 11160318', 'Application No. 11179329']

Patent US9019884 - Inactivity timer in a discontinuous reception configured system - Google Patents
Systems, methods and wireless devices are provided that utilize a timer to ensure a receiver of a wireless device is on to receive downlink transmissions. In the event the timer runs out without further resource allocation, the mobile device turns its radio off. If a further resource allocation occurs...http://www.google.ca/patents/US9019884?utm_source=gb-gplus-sharePatent US9019884 - Inactivity timer in a discontinuous reception configured system
Publication number US9019884 B2
Application number US 14/078,864
Filing date 13 Nov 2013
Also published as CA2696236A1, CA2696236C, DE602008005813D1, EP2028780A1, EP2028781A1, EP2028903A1, EP2028903B1, EP2346198A2, EP2346198A3, EP2375829A1, EP2375829B1, EP2408237A1, EP2408237B1, US8144679, US8265080, US8369256, US8483624, US8699393, US20090052361, US20090052367, US20090054006, US20120147803, US20130128748, US20130294311, US20140071875, US20170034759, WO2009026281A1, WO2009026285A2, WO2009026285A3, WO2009026291A2, WO2009026291A3
Publication number 078864, 14078864, US 9019884 B2, US 9019884B2, US-B2-9019884, US9019884 B2, US9019884B2
Inventors Zhijun Cai, James Earl Womack
Patent Citations (88), Non-Patent Citations (58), Classifications (18), Legal Events (2)
Inactivity timer in a discontinuous reception configured system
US 9019884 B2
1. A method of controlling a receiver in a wireless device, the method comprising:
controlling the receiver during a plurality of awake periods and a plurality of sleep periods, the awake periods alternating in time with the sleep periods, such that the receiver is on during each of the awake periods, and the receiver is off for at least some of the sleep periods;
receiving, during one of the awake periods, signaling that defines an uplink transmission resource, the transmission resource allocated during a portion of a sleep period, wherein the signaling that defines the uplink transmission resource is an uplink grant over a control channel, and wherein the uplink grant is received using at least one layer 1 control channel element;
controlling the receiver to be on during the portion of the sleep period;
monitoring, during the portion of the sleep period, for signaling that defines an additional uplink transmission resource, and in the event such signaling is received, controlling the receiver to be on for an additional portion of a sleep period;
starting or restarting a timer responsive to receiving signaling that defines the uplink transmission resource, wherein the timer is an inactivity timer; and
controlling the receiver to be on as long as the timer has not expired.
during any portion of a sleep period that the mobile device is controlling the receiver to be on, monitoring for signaling defining further uplink transmission resources so long as the timer has not expired, and restarting the timer responsive to receiving such signaling; and
controlling the receiver to be off at expiry of the timer.
3. The method of claim 1, wherein the wireless device is a long term evolution wireless device.
4. The method of claim 1, wherein the uplink grant corresponds to an uplink semi-persistent allocation.
5. The method of claim 1, further comprising restarting the timer responsive to receiving a dynamically scheduled transmission before expiry of the timer.
6. A mobile communication device having a receiver, which is enabled to be on during each of a plurality of awake periods and off during at least some portions of at least some of a plurality of sleep periods, the device configured to:
receive, during one of the awake periods, signaling that defines an uplink transmission resource, the transmission resource allocated during a portion of a sleep period, wherein the signaling that defines the uplink transmission resource is an uplink grant over a control channel, and wherein the uplink grant is received using at least one layer 1 control channel element;
control the receiver to be on during the portion of the sleep period;
monitor, during the portion of the sleep period, for signaling that defines an additional uplink transmission resource, and in the event such signaling is received, controlling the receiver to be on for an additional portion of a sleep period;
start or restart a timer responsive to receiving signaling that defines the uplink transmission resource, wherein the timer is an inactivity timer; and
control the receiver to be on as long as the timer has not expired.
7. The device of claim 6, further configured to:
during any portion of a sleep period that the mobile device is controlling the receiver to be on, monitor for signaling defining further uplink transmission resources so long as the timer has not expired, and restart the timer responsive to receiving such signaling; and
control the receiver to be off at expiry of the timer.
8. The device of claim 6, wherein the device is a long term evolution wireless device.
9. The device of claim 6, wherein the uplink grant corresponds to an uplink semi-persistent allocation.
10. The device of claim 6, further configured to restart the timer responsive to receiving a dynamically scheduled transmission before expiry of the timer.
11. A non-transitory computer-readable medium comprising instructions executable by at least one processor of a communications device for causing the device to:
12. The computer-readable medium of claim 11, further comprising instructions executable by at least one processor for causing the device to:
13. The computer-readable medium of claim 11, wherein the device is a long term evolution wireless device.
14. The computer-readable medium of claim 11, wherein the uplink grant corresponds to an uplink semi-persistent allocation.
15. The computer-readable medium of claim 11, further comprising instructions executable by at least one processor for causing the device to:
restart the timer responsive to receiving a dynamically scheduled transmission before expiry of the timer.
FIG. 11 is a flowchart of a method in a mobile device to keep its radio on to allow for dynamic allocations; and
FIG. 12 is a flowchart of a method in a wireless network for sending dynamic allocations to a mobile device.
According to one broad aspect, the application provides a method in a wireless device, the method comprising: configuring the device for discontinuous reception (DRX) having on durations; receiving signalling over a control channel, during one of the on durations; and starting an inactivity timer.
According to another broad aspect, the application provides a wireless device comprising: a processor configured to control a receiver to have on durations; a receiver configured to receive signalling over a control channel during one of the on durations; and the processor further configured to start an inactivity timer upon reception of the signalling over the control channel.
According to another broad aspect, the application provides a method of controlling a radio in a wireless device, the method comprising: controlling the radio during a plurality of awake periods and a plurality of sleep periods, the awake periods alternating in time with the sleep periods, such that the radio is always on during each of the awake periods, and the radio is off for at least some of the sleep periods; receiving, during one of the awake periods, signaling that defines a downlink transmission resource to communicate a packet or sub-packet, the transmission resource allocated during a portion of a sleep period; controlling the radio to be on during the portion of the sleep period; and monitoring, during the portion of the sleep period, for signaling that defines an additional transmission resource to communicate an additional downlink packet or sub-packet, and in the event such signaling is received, controlling the radio to be on for an additional portion of a sleep period.
According to another broad aspect, the application provides a wireless device comprising: a wireless access radio for sending and receiving wireless communications to and from a network; a radio manager that controls the radio of the wireless device during a plurality of awake periods and a plurality of sleep periods, the awake periods alternating in time with the sleep periods, such that the radio is always on during each of the awake periods, and the radio is off for at least some of the sleep periods; the wireless device further configured to: receive, during one of the awake periods, signaling that defines a downlink transmission resource to transmit an additional downlink packet or sub-packet, the downlink transmission resource allocated during a portion of a sleep period; control the radio to be on during the portion of the sleep period; and monitor, during the portion of the sleep period, for signalling that defines additional downlink transmission resource to transmit another additional downlink packet or sub-packet, and in the event such signalling is received, controlling the radio to be on for an additional portion of a sleep period.
Referring now to FIG. 1, shown is a signalling diagram showing dynamic scheduling vs. semi-persistent scheduling. Time is on the horizontal axis. Shown is a periodic semi-persistent allocation 50. For VoIP transmission, this can for example include a resource allocated every 20 ms. In addition, there is a regular set of layer 1 CCEs 52 that are transmitted. In the illustrated example, these are transmitted in every 1 ms but it is to be clearly understood that the other resource allocation periods and CCE periods are possible. This example assumes downlink transmission, but a similar approach applies to uplink transmission. During the periods that occur between talk-spurts, (also referred to as “silence” or “silence periods”), the transmitter and receiver can be turned off. During a talk-spurt period (also referred to as a period that VoIP transmission is “active”, or “active mode”), if not for dynamic scheduling, the mobile device could wake up regularly to blind-detect its data in the semi-persistently allocated resource at the pre-defined interval (e.g. every 20 ms) while entering a “sleeping” mode at other times. This can also be referred to as DRX (discontinuous reception). This simply means that the receive capability of the mobile device's radio is basically turned off while the mobile device is in sleep mode thereby resulting in battery life extension. However, given that other data may arrive via dynamic scheduling by any of the CCEs 52, the mobile device needs to monitor the CCEs of all sub-frames. In the full dynamic scheduling case there is no DTX or DRX ruling out the possibility of using DRX since the mobile device needs to continue monitoring the layer 1 CCEs for dynamic scheduling grants for possible data coming. This is not power efficient and leads to lower battery charge lifetimes.
The mobile device 10 has a wireless access radio 12, a processor 16 and a radio manager 14 that is responsible for controlling the wireless access radio 12. There may be additional components not shown. The wireless network 28 has a scheduler 32 that encompasses a semi-persistent scheduler 34 and a dynamic scheduler 36. The scheduler 32 may reside in a base station or elsewhere in the network 28. In LTE, the scheduler is typically in the eNB (enhanced NodeB). In the examples that follow, it is assumed that scheduler 32, transceiver 31 and antenna 33 are all parts of a base station. Also shown is a DRX controller 29 that is responsible for setting up/configuring/obtaining knowledge of the DRX behaviour for each mobile device. The DRX controller 29 may be part of a base station and may be implemented in software running on appropriate hardware, hardware, firmware or combinations thereof.
The wireless network 28 has components such as base stations (not shown) for providing wireless access. The scheduler 32 may reside in the base stations or elsewhere in the network 28. In LTE, the scheduler is typically in the eNB (enhanced NodeB). In the examples that follow, it is assumed scheduler 32 is part of a base station.
In some embodiments, in addition to the above-discussed DRX control functions, the DRX controller 29 performs radio resource control and radio resource management, which take care of one or more of radio resource assignment/release/re-assignment, radio bearer control, admission control, radio related signalling, mobility, measurement, and paging, to name a few specific examples.
Referring now to FIG. 3, shown is a signalling diagram showing an example of semi-persistent and dynamic scheduling and DRX. Shown is a semi-persistent allocation 60 available for semi-persistent VoIP downlink transmissions. In addition, there are layer 1 CCEs 62 for signalling dynamic allocations so as to allow the transmission of additional packets. This represents the transmissions from the base station. The mobile device receiving the transmissions alternates between being in an awake state and a sleep state. The mobile station is in an awake state during awake periods 64 and the mobile device is nominally in a sleep state during sleep periods 66. The first thing that the scheduler in the network needs to do is to ensure that the semi-persistent allocation 60 coincides with the awake periods 64. In addition, each awake period 64 is longer than the minimum necessary to transmit the VoIP semi-persistent allocation. There is also the opportunity to dynamically schedule (as signalled on one of the CCEs 62) and transmit an additional packet. An example of this is shown where a dynamic allocation is signalled in CCE 62-1. Additional packet 67 is shown transmitted immediately following CCE 62-1. The additional packet might for example be an RTCP packet, SIP/SDP packet, or a packet that has not undergone IP\UDP\RTP header compression, etc. While the mobile device is in the sleep state, it operates in a reduced power consumption mode, by turning off reception capability and/or by turning off its reception and transmission capabilities. In this example, the network has scheduled the additional packet 67 to be transmitted during one of the awake periods 64, and signals this using a CCE 62-1 that is transmitted during one of the awake periods 64. More generally, when the mobile device wakes up after a sleep period, the mobile device will not only blind detect its own VoIP data on the semi-persistently allocated resource 60, but also will detect, more generally attempt to detect, all the CCEs during the awake periods.
The above discussion is focussed on downlink transmission from the base station to the mobile device and on the mobile device's ability to turn off its reception capability during the sleep period. However, some mobile devices are not able to turn off only their reception capability while leaving on a transmit capability or vice versa. Thus, for such devices in order to fully realize the benefit of having an awake period and a sleep period for reception, uplink transmissions should also be scheduled to align with these awake periods and sleep periods. An example of this is shown in FIG. 4. In FIG. 4, the downlink transmission is indicated at 78 and this is basically the same as that described above with reference to FIG. 3, and this will not be described again. The uplink transmissions are generally indicated at 80. Here, there is a semi-persistent allocation 82 for VoIP UL transmissions. These are scheduled to occur during the periods 64 that the mobile device is awake. In addition, an uplink control channel is indicated at 84. In the illustrated example, this occurs every 1 ms. The mobile device only transmits the uplink control channel during the awake periods 64. The mobile device can use the uplink control channel to make requests for additional resources. By scheduling the uplink semi-persistent transmission and downlink semi-persistent transmission to occur during the same awake period, the mobile device can realize much more efficient DRX and DTX (discontinuous reception and discontinuous transmission) behaviour. In the example of FIG. 4, the mobile device is configured to sleep every 15 ms, and then wake up for 5 ms. During this 5 ms awake period, the mobile device will receive DL semi-persistent reception if available (during a DL talk-spurt) and make an uplink semi-persistent transmission if available (during an UL talk-spurt). The mobile device will also detect all the DL grants and possibly make uplink additional resource requests.
Referring now to FIG. 5, shown is a state diagram having DRX/DTX state transitions for VoIP. It is noted that when there is no uplink and downlink transmission (i.e. silence in both directions), the mobile device only needs to monitor the DL CCEs for dynamic scheduling during the awake period. There are two main states. The first main state is the UE sleep state 100 and the second main state is the UE awake state 102. For the illustrated example, it is assumed that the sleep state 100 lasts 15 ms and the awake state lasts 5 ms and can be extended, but this is again implementation specific. Blocks 102-1 and 102-2 illustrate actions executed by the UE for downlink communication during the awake state 102. At block 102-1, the UE receives all of the downlink CCEs and processes them to identify downlink dynamic scheduling if present. This is done irrespective of whether or not there is any downlink VoIP transmission. In the event that a downlink talk-spurt is ongoing, then the UE, at block 102-2 receives the VoIP payload in the semi-persistent resource. Blocks 102-3 and 102-4 illustrate actions executed by the UE in respect of uplink transmissions. At block 102-3, the UE makes a resource request over a random access channel (RACH) and monitors the downlink CCE for uplink grants, if the mobile device determines that it needs a dynamic allocation for uplink transmission. In addition, if there is an uplink talk-spurt in progress, then the mobile device, at block 102-4, transmits the uplink VoIP payload in the semi-persistent resource for uplink transmission.
A method in a wireless network for performing downlink transmission to mobile devices will be described with reference to the flowchart of FIG. 6. This method is performed for each mobile device being provided wireless access on a semi-persistent downlink transmission resource. The method begins at block 6-1 with transmitting downlink packets to the mobile device using a semi-persistent downlink transmission resource that is aligned with awake periods defined for the mobile device. These can be downlink VoIP packets during a downlink talk-spurt for a VoIP session involving the mobile device or otherwise. Blocks 6-2, 6-3, 6-4 are executed for each additional downlink packet for the mobile device. In block 6-2, the wireless network dynamically allocates an additional downlink transmission resource to transmit the additional packet, the additional resource being allocated to occur within one of the awake periods defined for the mobile device. In block 6-3, during one of the awake periods defined for the mobile device, the wireless network transmits signaling that defines the additional downlink transmission resource to transmit the additional packet. In block 6-4, during one of the awake periods defined for the mobile device, the wireless network transmits the additional downlink packet using the additional downlink resource. In some embodiments, this method is performed in a base station. In other embodiments, certain portions of the method, for example the dynamic allocation, can be performed in another network element if centralized scheduling is performed.
A method in a wireless network for performing uplink reception from mobile devices will be described with reference to the flowchart of FIG. 7. This method is performed for each mobile device being provided wireless access on a semi-persistent downlink transmission resource. The method begins at block 7-1 with the wireless network receiving uplink packets from the mobile device using a semi-persistent uplink transmission resource that is aligned with the awake periods defined for the mobile device. These can be VoIP packets during an uplink talk-spurt for a VoIP session involving the mobile device or otherwise. Blocks 7-2, 7-3, 7-4 and 7-5 are performed for each additional each additional uplink packet for the mobile device. In block 7-2, during one of the awake periods, the wireless network receives a request for an additional uplink transmission resource to transmit the additional uplink packet. In block 7-3, the wireless network dynamically allocates the additional uplink transmission resource such that the additional uplink transmission resource occurs during one of the awake periods defined for the mobile device. In block 7-4, during one of the awake periods defined for the mobile device, the wireless network transmits signaling that defines the additional uplink allocation. In block 7-5, the wireless network receives the additional uplink packet using the additional uplink transmission resource.
Referring now to FIG. 8, a method of receiving downlink transmission executed by a mobile device will now be described. The method begins at block 8-1 with the mobile device controlling a reception capability of the mobile device during a plurality of awake periods and a plurality of sleep periods, the awake periods alternating in time with the sleep periods, such that the reception capability is always on during each of the awake periods, and the reception capability is off for at least some of the sleep periods. On a nominal basis, typically the reception capability will be off for every sleep period. At block 8-2, the mobile device receives downlink packets on a semi-persistent downlink transmission resource that is aligned with a plurality of awake periods defined for the mobile device. These can be VoIP downlink packets during a downlink talk-spurt for a VoIP session involving the mobile device, or otherwise. Blocks 8-3 and 8-4 are performed for each additional downlink packet for the mobile device. In block 8-3, during one of the awake periods, the mobile device receives signaling that defines an additional downlink transmission resource to transmit the additional packet, the additional downlink transmission resource being allocated to occur within one of the awake periods defined for the mobile device. In block 8-4, during one of the awake periods, the mobile device receives the additional downlink packet on the additional downlink resource.
Referring now to FIG. 9, a method of transmitting uplink transmissions executed by a mobile device will now be described. The method begins at block 9-1 with controlling a transmission capability of the mobile device such that the transmission capability is on during all of the awake periods and such that the transmission capability is off for at least some of the sleep periods. In block 9-2, the mobile device transmits uplink packets (VoIP packets or otherwise) using a semi-persistent uplink transmission resource that is aligned with the awake periods defined for the mobile device. Blocks 9-3, 9-4, 9-5 are executed for each additional uplink packet for the mobile device. In block 9-3, during one of the awake periods defined for the mobile device, the mobile device transmits a request for an additional uplink transmission resource to transmit the additional uplink packet. In block 9-4, during one of the awake periods, the mobile device receives signaling that defines the additional uplink transmission resource, the additional uplink transmission resource being allocated to occur during one of the awake periods defined for the mobile device. In block 9-5, during one of the awake periods, the mobile device transmits the additional uplink packet using the additional uplink transmission resource.
In some embodiments, mobile devices have radios that feature a transmitter and a receiver. While the radio is on, the receiver capability is on, and the receiver will be actively attempting to process signals received on the mobile device's antenna(s). There is not necessarily content for the given mobile device all the time that the receiver is on, but the receiver is consuming power nonetheless for that time period. In addition, while the radio is on, the mobile device is able to transmit. However, so long as the mobile device does not have something to transmit, there is no active transmission taking place, and as such little or no transmit power consumption occurs until there is an active transmission.
In embodiments referring to NACK/ACK transmission, the particular NACK/ACK scheme employed is implementation specific. Some embodiments employ an ACK only scheme; other embodiments employ a NACK only scheme, while others use both ACKs and NACKs.
In some embodiments, as described in the detailed examples above, the dynamic allocations are always scheduled to occur during one of the awake periods that are nominally defined with fixed duration. In another embodiment, an awake period can be extended to allow for the transmission/reception of one or more dynamic allocations. For example, a CCE sent during an awake period can allocate a dynamic resource allocation, and the mobile device stays powered on to allow that. During the period that the mobile device is powered on as a result of the dynamic resource allocation the mobile device continues to monitor the CCEs, and an additional CCE signalling another dynamic allocation can be sent and so on.
Referring now to FIG. 11, shown is a flowchart of a method for execution on a mobile device, such as the mobile device 10 of FIG. 2 for example.
The method starts at block 11-1 with the mobile device controlling its radio during a plurality of awake periods and a plurality of sleep periods, the awake periods alternating in time with the sleep periods, such that the radio is always on during each of the awake periods, and the radio is off for at least some of the sleep periods. Examples of how this might be achieved have been described above. The awake periods are also referred to as on periods, or periods of nominal on duration.
At block 11-2, the mobile device receives downlink packets on a semi-persistent downlink transmission resource that is aligned with the plurality of awake periods defined for the mobile device. In the event there is something to send during a given awake period, it is sent on the semi-persistent downlink transmission resource. If there is nothing to send, the semi-persistent resource is not used. Various examples have been provided above.
Blocks 11-3, 11-4 and 11-5 are performed for an additional downlink packet or sub-packet for the mobile device. To begin, at block 11-3, during one of the awake periods, the mobile device receives signaling that defines an additional transmission resource to communicate the additional packet or sub-packet. The receipt of such signalling is a trigger for the mobile device to control its radio to be on for an additional period at block 11-4. The additional period occurs during a portion of a sleep period. At block 11-5, during the portion of the sleep period that the mobile device is keeping its radio on, the mobile device monitors for signaling that defines yet another additional transmission resource to another additional packet or sub-packet. In the event such signaling is received, yes path at block 11-6, the mobile device keeps its radio on for an additional portion of the sleep period at block 11-7 and the method continues back at block 11-5. In the event no such signalling is received (no path, block 11-6) typically, the mobile device will turn its radio off at the end of the additional period. This is shown at block 11-8. It is possible the mobile device will keeps its radio on for some other reason.
The use of an inactivity timer is one mechanism for realizing the functionality described above with reference to FIG. 11. In some embodiments, upon receiving signalling that defines the additional transmission resource to transmit the additional packet or sub-packet, the mobile device starts a timer that counts down the additional period. The timer may be referred to as an inactivity timer because the mobile device will turn its radio off only if the timer times out without any activity (i.e. further dynamic allocation). If before the expiry of the timer signalling is received that defines yet another additional downlink transmission, the mobile device restarts the timer. The mobile device keeps is radio on as long as the timer has not expired. So long as the timer has not expired, additional dynamic allocations can be made that will restart the timer. The mobile device monitors for signaling defining further transmission resources to transmit further additional packets or sub-packets so long as the timer has not expired. In some embodiments, the timer starts when signaling that defines the additional transmission resource is received. In some embodiments, the timer starts when the packet transmitted on the resource thus allocated is communicated to/by the mobile device.
The methods described above may, for example, be implemented by the radio manager 14 in controlling the wireless access radio 12 of FIG. 2. The control functionality may be implemented in hardware, software, firmware, or any combination thereof. Another embodiment provides a computer readable medium having instructions stored thereon for execution by a mobile device that control the execution of one of the methods described above.
Referring now to FIG. 12, shown is a flowchart of a method for execution by a wireless network. This might, for example, be executed by the wireless network 28 of FIG. 2. Typically the method would be executed by a base station that is providing wireless access to a given mobile device, but other network components may be involved as well. Various steps are executed for each mobile device of a plurality of mobile devices. At block 12-1, the network transmits downlink packets to the mobile device using a semi-persistent downlink transmission resource that is aligned with awake periods defined for the mobile device. The mobile device will have its radio on during these periods and will be able to receive the transmission. In the event there is nothing for the mobile device during a given awake period, the semi-persistent resource is not used to transmit to the mobile device for that period. Blocks 12-2, 12-3 and 12-4 are executed for each additional packet or sub-packet for the mobile device. At block 12-2, the network dynamically allocates an additional transmission resource to communicate the additional packet or sub-packet. At block 12-3, during one of the awake periods defined for the mobile device, the network transmits signaling that defines the additional transmission resource to communicate the additional packet or sub-packet, the signaling indicating to the mobile device to keep its radio on for a portion of a sleep period. At block 12-4, the network communicates the additional downlink packet using the additional downlink resource. At block 12-5, the network optionally transmits signaling defining an additional dynamic allocation in the event there is yet another additional packet or sub-packet for the mobile device. Before the mobile device conditionally turns off its radio at the end of the additional period, the network transmits signalling defining an additional dynamic allocation, the signalling indicating the mobile device to keep its radio on for yet another portion of the sleep period.
The methods described above may, for example, be implemented by the scheduler 32 of the wireless network 28 of FIG. 2. The control functionality may be implemented in hardware, software, firmware, or any combination thereof. Another embodiment provides a computer readable medium having instructions stored thereon for execution by a wireless network that control the execution of one of the methods described above.
More generally, in some embodiments, the mobile device keeps its radio on for an additional period beyond the normal awake period for any number of reasons. Specific examples include transmission of an ACK/NACK, reception of a retransmission in the event the packet was received in error, and receiving a dynamically scheduled transmission. If during such an additional period the mobile device receives a dynamic allocation, the mobile device starts a timer upon receipt of a dynamically scheduled transmission during which the radio is kept on. In addition, the mobile device re-starts the timer upon receipt of a further dynamically scheduled transmission before expiry of the timer.
In some embodiments, the portion of the sleep period is an extension of an awake period. In other embodiments, the portion of the sleep period is separate and distinct from the awake periods.
In some embodiments, this behavior is implemented in respect of dynamic allocations for uplink transmission in which case the transmission resource is an uplink transmission resource, and the communication on the additional transmission resource involves transmission from the mobile device to the network. In other embodiments, this behavior is implemented in respect of dynamic allocations for downlink transmission I which case the transmission resource is a downlink transmission resource, and the communication on the additional transmission resource involves transmission from the network to the mobile device. In other embodiments, this behavior is implemented in respect of dynamic allocations for uplink or downlink transmission in which case the additional transmission resource may be either an uplink transmission resource or a downlink transmission resource, and the communication on the additional transmission resource may involve transmission from the mobile device to the network, or from the network to the mobile device. In the detailed examples that follow it is assumed that the dynamic allocations are for downlink transmission.
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International Classification H04W52/02, H04L5/00, H04L1/18, H04W88/02, H04W76/04, H04W40/00
Cooperative Classification Y02B60/50, H04W52/0209, H04W40/005, H04L1/18, H04W88/02, H04W76/048, H04L5/0064, H04L5/0007, H04L5/0053, H04W76/04, H04L5/0091
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