KR20190019959A - Adaptive inactivity timeout management - Google Patents

Abstract

Methods, systems and devices for wireless communication are described. The method includes the steps of the wireless device communicating with an access point (AP) during the awake intervals in an awake mode, determining a congestion level associated with a radio frequency (RF) spectrum band, and identifying And determining an inactivity timeout (ITO) interval at which the wireless device remains awake based on the determined RF spectrum band and the determined congestion level used by the wireless device to communicate with the AP. The second method includes polling the AP for a delivery traffic indication message (DTIM) period, and determining that the trigger condition is met based on a determination that at least one null data message is received from the AP or that a predetermined threshold number of polls has timed out And modifying the timing at which the station polls the AP based on the identifying.

Description

Adaptive inactivity timeout management

[0001] The following generally relates to wireless communications in a station, and more particularly, to adaptive inactivity timeout management.

[0002] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and the like. These systems may be multiple access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency and power). A wireless network, e.g., a WLAN, e.g., a Wi-Fi (i. E., Institute of Electrical and Electronics Engineers (IEEE) 802.11) network is an access point capable of communicating with one or more stations (AP). The AP may be coupled to a network, such as the Internet, and may allow the mobile device to communicate (or communicate with other devices coupled to the access point) over the network. The wireless device is capable of bi-directional communication with the network device. For example, in a WLAN, the STA may communicate with the associated AP via DL and UL. The DL (or forward link) may refer to the communication link from the AP to the station, and the UL (or reverse link) may refer to the communication link from the station to the AP.

[0003] Power consumption of APs in a WLAN can also be a concern, but power consumption by an STA is particularly important because these devices typically rely on power from one or more of the batteries. WLAN systems, for example, systems using the 802.11 standard family (e.g., WiFi) can use channel sense multiple access (CSMA), where STAs detect channel conditions before accessing the channel. In WLAN systems, an AP may be communicating concurrently with several or many other STAs, so that data transmissions may be interrupted by periods during which the AP is serving other STAs. The STA may activate a power saving mode in which the STA moves to sleep mode on a periodic or quasi-periodic basis and wakes up if data is to be exchanged between the AP and the STA. In some cases, after the last data packet is transmitted or received by the STA, the STA may remain in awake mode if there are any data packets in transit that have not yet been received. The STA can keep in awake mode until the expiration of the inactivity timeout (ITO) interval. However, even if there are no additional data packets to be received, the STA waits until the ITO interval expires and keeps the awake. This can lead to unnecessary power consumption without the added benefit of better performance.

[0004] The described techniques relate to improved methods, systems, devices or devices that support adaptive inactivity timeout management. Generally, the described techniques provide for determining an inactivity timeout (ITO) interval for a station (STA) based on network congestion. The ITO may also be determined based on the radio frequency (RF) spectrum band used by the STA or the operating bandwidth mode used by the STA, which may be associated with the RF spectrum band. In some instances, the congestion level may be determined based on different activity levels in the wireless network. For example, ITO may depend on both the RF spectrum band used by the STA and the congestion of the RF spectrum band. The congestion level can also be determined based on the activity level of other devices operating in the RF spectrum band and also based on the reception activity associated with traffic sent to the STA in the RF spectrum band.

[0005] The STA polls the access point (AP) based on whether the STA receives a certain number of null data messages or whether the STA experiences a certain number of poll timeouts during a delivery traffic indication message (DTIM) Additional adaptive inactivity timeout management techniques that involve modifying the timing of < RTI ID = 0.0 > In these cases, the STA may either stop polling the AP to save power for the rest of the DTIM period, disable the modification of the timing to poll the AP, or poll the station (e.g., Polling) may be disabled. Other examples may include changing the interval between polls sent from the STA to the AP such that the polls span the DTIM period.

[0006] A method of wireless communication in a station is described. The method comprises the steps of the wireless device communicating with the AP of the wireless communication network during the awake intervals in the awake mode, identifying the RF spectrum band used by the wireless device to communicate with the AP, the congestion associated with the RF spectrum band Determining an ITO interval at which the wireless device remains in awake mode based at least in part on an identified RF spectrum band and a determined congestion level during an awake interval of the awake intervals, have.

[0007] A device for wireless communication at a station is described. The apparatus comprises means for communicating with an AP of the wireless communication network during the awake intervals in which the wireless device is in awake mode, means for identifying an RF spectrum band used by the wireless device to communicate with the AP, Means for determining an ITO interval at which the wireless device remains in an awake mode based at least in part on an identified RF spectrum band and a determined congestion level during an awake interval of the awake intervals, . ≪ / RTI >

[0008] Another device for wireless communication at a station is described. The apparatus may comprise a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions cause the processor to cause the wireless device to communicate with the AP of the wireless communication network during the awake intervals in the awake mode, to identify the RF spectrum band used by the wireless device to communicate with the AP, To determine a congestion level associated with the band and to cause the wireless device to determine an ITO interval that is maintained in awake mode based at least in part on the identified RF spectrum band and the determined congestion level during an awake interval of the awake intervals It can be possible.

[0009] A non-transitory computer readable medium for wireless communication at a station is described. Non-volatile computer readable media may be used to cause a processor to communicate with an AP in a wireless communication network during an awake interval in which the wireless device is in awake mode, to identify an RF spectrum band used by the wireless device to communicate with the AP To determine a congestion level associated with the RF spectrum band, and to determine, during an awake interval of the awake intervals, an ITO interval in which the wireless device remains in an awake mode based at least in part on the identified RF spectrum band and the determined congestion level And < / RTI >

[0010] In some examples of the methods, apparatus and non-volatile computer readable media described above, identifying the RF spectrum band used by the wireless device may include identifying an operating bandwidth mode used by the wireless device to communicate with the AP . In some examples of the methods, apparatus and non-transitory computer readable media described above, the operating bandwidth mode may be 20 megahertz (MHz) bandwidth mode or 40 MHz bandwidth mode, or 80 MHz bandwidth mode or 160 MHz bandwidth mode, or 80 + 80 MHz Bandwidth mode, or a combination thereof.

[0011] In some examples of the above-described methods, apparatus, and non-transitory computer readable media, identifying an RF spectrum band used by a wireless device includes identifying an RF spectrum band that is used by a wireless device, And identifying the spectrum range. In some examples of the methods, apparatus and non-transitory computer readable media described above, the RF spectrum range used by the wireless communication network is at least 2.4 GHz (GHz) spectrum, or 5 GHz spectrum or 900 MHz spectrum, or 60 GHz Spectra, or a combination thereof.

[0012] In some examples of the methods, apparatus and non-transitory computer readable media described above, determining the congestion level associated with the RF spectrum band includes determining the congestion level associated with the RF spectrum band during the first awake interval. In some examples of the above-described methods, apparatus and non-transitory computer readable media, the determination of the ITO interval may comprise determining whether the wireless device is in an awake mode during the first or subsequent awake interval, or a combination thereof, Lt; / RTI >

[0013] In some examples of the above-described methods, apparatus and non-transitory computer readable media, determining the ITO interval includes receiving a plurality of sounding triggers, interpolating between sounding triggers of the received plurality of sounding sequences And determining the ITO based at least in part on the determined intervals.

[0014] In some examples of the above-described methods, apparatus and non-transitory computer readable media, determining the ITO interval includes determining that the congestion level associated with the RF spectrum band may be greater than a predetermined threshold for the identified RF spectrum band do. Some examples of the above-described methods, apparatus, and non-transitory computer readable media may further include processes, features, means or instructions for increasing the ITO interval at which the wireless device is maintained in awake mode .

[0015] In some examples of the above-described methods, apparatus, and non-volatile computer readable media, the station and the AP may be in at least a multi-user multiple input multiple output (MU-MIMO) mode or a single- Or a combination thereof.

[0016] In some examples of the above-described methods, apparatus, and non-transitory computer readable media, the congestion level may be determined based at least in part on data received by the station in the RF spectrum band. In some examples of the above-described methods, apparatus, and non-transitory computer readable media, the congestion level may be further determined based at least in part on other activities of the wireless communication network in the RF spectrum band.

[0017] A method of wireless communication in a station is described. The method includes the steps of determining a DTIM period, polling the AP during the DTIM period and while the station is in sleep mode, and the step-trigger condition identifying that the trigger condition is satisfied, wherein at least one null data message is received Or at least partially based on a determination that a predetermined threshold number of polls has timed out or a combination thereof, and modifying the timing at which the station polls the AP based at least in part on identifying that the trigger condition is met Step < / RTI >

[0018] A device for wireless communication at a station is described. The apparatus comprises means for determining a DTIM period, means for polling the AP during the DTIM period and while the station is in the sleep mode, means for identifying that the trigger condition is satisfied, the trigger condition comprising at least one null data message Determining at least in part whether the polls received from the AP or a predetermined threshold number of polls have timed out, or at least partially based thereon, and timing at which the station polls the AP based at least in part on identifying that the trigger condition is met May include means for modifying the data.

[0019] Another device for wireless communication at a station is described. The apparatus may comprise a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions cause the processor to determine a DTIM period, cause the AP to poll during the DTIM period and while the station is in the sleep mode, to identify that the trigger condition is satisfied, and the trigger condition may include at least one null data message Is based at least in part on the determination that the polls have been received from the AP or that a predetermined threshold number of polls have timed out, or a combination thereof, - the timing at which the station polls the AP based at least in part on identifying that the trigger condition is met Lt; / RTI >

[0020] A non-transitory computer readable medium for wireless communication at a station is described. The non-transitory computer readable medium causes the processor to determine a DTIM period, cause the AP to poll during the DTIM period and while the station is in the sleep mode, to identify that the trigger condition is satisfied, Determining that a null data message has been received from the AP or a predetermined threshold number of polls has timed out, or based at least in part on a combination thereof; determining, based at least in part on identifying that the trigger condition is satisfied, Lt; RTI ID = 0.0 > AP < / RTI >

[0021] Some examples of methods, apparatus, and non-transitory computer readable media described above may further include processes, features, means or instructions for adding an AP to the list of APs whose stations may modify the timing have. Some examples of methods, apparatus, and non-volatile computer readable media described above may further include processes, features, means or instructions for removing an AP from the list at the expiration of a lifetime factor associated with the AP have.

[0022] Some examples of the above-described methods, apparatus, and non-transitory computer readable media further include processes, features, means, or instructions for re-associating with the AP after the station has modified the timing of polling the AP . Some examples of methods, apparatus, and non-transitory computer readable media described above further include processes, features, means, or instructions for returning to polling the AP for a second DTIM period in accordance with the default timing . Some examples of the above-described methods, apparatus, and non-transitory computer readable media may include modifying the default timing at which a station polls an AP based, at least in part, on a second identification that a trigger condition may have been met during a second DTIM period May also include processes, features, means, or instructions for implementing the invention.

[0023] In some examples of the above-described methods, apparatus and non-transitory computer readable media, modifying the timing includes identifying the remainder of the DTIM period and discontinuing polling the AP for the remainder of the DTIM period do. Some examples of the above-described methods, apparatus, and non-transitory computer readable media may further comprise processes, features, means, or instructions for resuming polling the AP for the duration of the immediately following DTIM.

[0024] In some examples of the above-described methods, apparatus, and non-transitory computer readable media, modifying the timing involves adjusting the time interval between the polls the station transmits to the AP. In some examples of the above-described methods, apparatus, and non-transitory computer readable media, modifying the timing may include identifying a consecutive number of polls sent to the AP that may have been timed out of the station, And disabling polling for the station based, at least in part, on the determination that it may be greater than a predetermined threshold.

[0025] Some examples of the above-described methods, apparatus, and non-transitory computer readable media include processes for identifying a percentage of a plurality of polls that may have been timed out for a plurality of polls transmitted from a station to an AP, , Means, or instructions. Some examples of the methods, apparatus, and non-transitory computer readable media described above may be used for disabling the station to modify the timing of polling the AP based, at least in part, on a determination that the percentage may be greater than a predetermined threshold Processes, features, means or instructions.

[0026] Some examples of methods, apparatus, and non-volatile computer readable media described above include processes for deleting a first block acknowledgment (ACK) session based, at least in part, on a determination that the percentage may be greater than a predetermined threshold , Features, means, or instructions. Some examples of the above-described methods, apparatus, and non-transitory computer readable media include processes, features, means or instructions for activating a second block ACK session with an AP after deleting a first block ACK session .

[0027] In some examples of the above-described methods, apparatus, and non-transitory computer readable media, polling the AP may include determining a plurality of intervals, based at least in part on the number of null messages received from the AP or the threshold number of time- To multiple APs with power-saving polls (PS-Poll). In some examples of the above-described methods, apparatus, and non-transitory computer readable media, polling an AP may include placing a plurality of speculative power-saving polls (PS-Poll) on APs at least partially based on the determined DTIM period As shown in FIG.

[0028] A method of wireless communication in a station is described. The method includes identifying a first activity level in an RF spectrum band used by a first wireless device based at least in part on the traffic sent to and received by the first wireless device, Identifying a second activity level in the RF spectrum band based at least in part on the transmit and receive activity for the second wireless device, determining a congestion level for the RF spectrum based at least in part on the first activity level and the second activity level And determining an ITO interval at which the wireless device is maintained in awake mode based at least in part on the estimated congestion level during an awake interval in which the first wireless device is in awake mode, have.

[0029] A device for wireless communication at a station is described. The apparatus comprises means for identifying a first activity level in an RF spectrum band used by a first wireless device based at least in part on the traffic sent to and received by the first wireless device, Means for identifying a second activity level in the RF spectrum band based at least in part on transmission and reception activity for a second wireless device of the wireless device; means for identifying a second activity level in the RF spectrum band based at least in part on a first activity level and a second activity level; Means for determining an ITO interval at which the wireless device is maintained in an awake mode based at least in part on an estimated congestion level during an awake interval in which the first wireless device is in an awake mode, . ≪ / RTI >

[0030] Another device for wireless communication at a station is described. The apparatus may comprise a processor, a memory in electronic communication with the processor, and instructions stored in the memory. Instructions cause the processor to identify a first activity level in an RF spectrum band used by the first wireless device based at least in part on the traffic sent to and received by the first wireless device, Determine a second activity level in the RF spectrum band based at least in part on the transmit and receive activity for the at least one second wireless device, and determine the second activity level in the RF spectrum based at least in part on the first activity level and the second activity level Enable the wireless device to determine an ITO interval that is maintained in awake mode based at least in part on an estimated congestion level during an awake interval in which the first wireless device is in an awake mode .

[0031] A non-transitory computer readable medium for wireless communication at a station is described. The non-volatile computer readable medium causes the processor to identify a first activity level in an RF spectrum band used by the first wireless device based at least in part on the traffic sent to and received by the first wireless device, 1 wireless device to identify a second activity level in the RF spectrum band based at least in part on transmit and receive activity for at least one second wireless device and to determine at least a first activity level and a second activity level at least partially The wireless device estimates the congestion level for the RF spectrum based on the estimated congestion level and determines the ITO interval in which the wireless device is maintained in the awake mode based at least in part on the estimated congestion level during the awake interval in which the first wireless device is in the awake mode ≪ RTI ID = 0.0 > and / or < / RTI >

[0032] In some examples of the methods, apparatus and non-transitory computer readable media described above, estimating the congestion level may comprise scaling the first and second activity levels by applying a scaling factor associated with the awake interval, And estimating the congestion level for the RF spectrum band based at least in part on the first and second activity levels.

[0033] In some examples of the methods, apparatus and non-volatile computer readable media described above, the traffic sent to and received by the first wireless device includes unicast data that is transmitted to the first wireless device. In some examples of the above-described methods, apparatus, and non-transitory computer readable media, transmission and reception activities for at least one second wireless device are performed in all of the RF spectrum bands other than transmit and receive traffic associated with the first wireless device And measurement of wireless communication network activities.

[0034] FIG. 1 illustrates an example of a system for wireless communication in a station that supports adaptive inactivity timeout management in accordance with aspects of the present disclosure.
[0035] FIG. 2 illustrates an example of a wireless network that supports adaptive inactivity timeout management in accordance with aspects of the present disclosure.
[0036] Figures 3A-3C illustrate exemplary polling procedures that support adaptive inactivity timeout management in accordance with aspects of the present disclosure.
[0037] Figures 4 through 6 show block diagrams of devices that support adaptive inactivity timeout management in accordance with aspects of the present disclosure.
[0038] FIG. 7 illustrates a block diagram of a system including an STA that supports adaptive inactivity timeout management in accordance with aspects of the present disclosure.
[0039] Figures 8-14 illustrate methods for adaptive inactivity timeout management in accordance with aspects of the present disclosure.

[0040] Aspects of the present disclosure are initially described in the context of a wireless network. The station (STA) of the wireless network may use adaptive inactivity timeout management techniques to save power when communicating with or connected to an access point (AP). These techniques may involve moving the STA to sleep mode and periodically waking up to listen to beacons (or other signals from the AP). In other techniques, the STA may periodically send polling messages to the AP while in sleep mode, and may only wake up if the STA determines that data messages are waiting for transmission from the AP based on polling.

[0041] When the STA wakes up, the STA may remain in awake mode for a given time period after the last data packet is transmitted or received to ensure that the entire data transmission or reception is complete. After a given time period known as the inactivity timeout (ITO) interval, the STA may revert to sleep mode. In some cases, if the AP serving the STA is also serving another STA or mobile device, there may be a delay in transmission from the AP to the STA, and the STA may return to sleep mode before receiving the entire transmission from the AP . As network congestion increases, transmission to the STA may be further delayed, which may cause the STA to lose data packets. This may result in lower valid throughput for the network since the data packets intended for the STA have not been received.

[0042] Additionally, in some cases, the STA may move to sleep mode before being assigned to a particular multi-user (MU) group. In these cases, the STA may appear as a single user (SU) in terms of the AP, and instead of sending the data only to users of the MU group, the AP may also see the STA as a separate SU entity by the AP Data (and in some cases the same data) may need to be transmitted to the STA. This can also result in lower effective throughput for the network.

[0043] In other situations, the AP may schedule data in a round-robin technique or send it to multiple STAs, where the AP may send a message to one STA before it moves to send another message to the second STA Message (e. G., From a unicast transmission). The AP may continue in this manner until all messages have been sent to each STA. If multiple STAs are waiting for messages during their respective ITO intervals, the STAs last transmitted by the AP may move to sleep mode (e.g., due to expiration of the ITO interval) prior to AP transmission (or STA reception) have. In other cases, the STA with the shortest ITO interval can move to sleep mode before sending the AP, regardless of when it is scheduled to receive transmissions.

[0044] Thus, in some instances, the STA may be capable of operating in a network congestion, radio frequency (RF) spectrum band (2.4 gigahertz (GHz), 5 GHz, 60 GHz, etc.) and / or an operating bandwidth mode (20 megahertz , 80 MHz, etc.). ≪ / RTI > For example, the determined ITO interval may vary depending on the congestion level, the RF spectrum band and / or the operating bandwidth mode used by the STA and may be selected from a look-up table (LUT) based on the factors described above .

[0045] The STA may also consider sounding sequences to determine whether data can be transmitted to the STA in the future. Based on the interval between sounding sequences or sounding sequences, the STA can either adjust the currently determined ITO or select a new ITO (e.g., from the LUT).

[0046] In some instances, the congestion level may be determined based on different activity levels in the wireless network. For example, the congestion level may be determined in the wireless network based on the activity level of all other devices, which may be referred to as other activities. The level of activity for other devices in the wireless network may include the transmission and reception of data and control information for other devices and STAs in the wireless network operating in the RF spectrum band. Other congestion metrics, such as those measured at a receiver of a given STA, may include UL traffic, DL traffic, STA's basic service set (BSS) traffic (MyBSS traffic) and / or other BSS (OBSS) traffic. The congestion level may also be based on the amount of data transmitted to and received by a given STA that may be referred to as STA reception activity or the number of frames received in a given STA. In some cases, the congestion level may also include a scaling factor for other activity levels and / or STA receive activity. The scaling factor may vary depending on network conditions or other factors. In some cases, the scaling factor may prefer to scale other activity levels for STA receive activity when determining congestion, for example, if the STA receive activity is expected to be low.

[0047] Additional adaptive inactivity timeout management techniques that can save power, accompanied by determining when the STA should stop polling the AP are also described. For example, in sleep mode, the STA may speculatively poll the AP to determine whether there is data to be sent to the STA in the AP's queue. If the STA receives multiple null data messages in response to polling, or if the STA experiences multiple poll timeouts, the STA can stop polling the AP, which can save power. Additionally, in some examples, depending on the number of null data messages or poll timeouts, the STA may change the interval between the polls to help prevent unnecessary polling of the AP if the AP is not responding to the polls.

[0048] Aspects of the present disclosure are further illustrated and described with reference to apparatus drawings, system diagrams, and flow diagrams related to adaptive inactivity timeout management.

[0049] FIG. 1 illustrates a wireless local area network (WLAN) 100 (also known as a Wi-Fi network) configured in accordance with various aspects of the present disclosure. The WLAN 100 may include an AP 105 and a plurality of associated STAs 115 which may include mobile stations, personal digital assistants (PDAs), other handheld devices, netbooks, notebook computers, Computers, laptops, display devices (e.g., TVs, computer monitors, etc.), printers, and the like. AP 105 and associated stations 115 may represent a basic service set (BSS) or an extended service set (ESS). The various STAs 115 in the network may communicate with each other via the AP 105. [ Also shown is the coverage area 110 of the AP 105 that can represent the basic service area (BSA) of the WLAN 100. An extended network station (not shown) associated with WLAN 100 may be connected to a wired or wireless distribution system that may allow multiple APs 105 to be connected at the ESS. In some cases, the WLAN 100 may support adaptive ITO management in which the STA 115 may determine the respective ITO interval based on network congestion, RF spectrum band or operating bandwidth mode. The congestion level may be based on different activity levels within the WLAN 100 and the ITO may be determined for the current or subsequent awake interval. In other instances, the STA 115 may modify the timing or interval between polling messages sent from the STA 115 to the AP 105. [

[0050] Although not shown in FIG. 1, STA 115 may be located at an intersection of more than one coverage area 110 and may be associated with more than one AP 105. A single AP 105 and an associated set of STAs 115 may be referred to as a BSS. An ESS is a set of connected BSSs. A distribution system (not shown) may be used to connect the APs 105 in the ESS. In some cases, the coverage area 110 of the AP 105 may be divided into sectors (also not shown). WLAN 100 may include different types of APs 105 (e.g., metropolitan area, home network, etc.) with varying and overlapping coverage areas 110. [ The two STAs 115 may also communicate directly via the direct wireless link 125 regardless of whether both of the STAs 115 are in the same coverage area 110. [ Examples of direct wireless links 120 may include Wi-Fi direct connections, Wi-Fi Tunneled Direct Link Setup (TDLS) links, and other group connections. STAs 115 and APs 105 may be configured to receive WLAN radio and baseband protocols for physical and MAC layers from IEEE 802.11 and 802.11b, 802.11g, 802.11a, 802.11n, 802.11ac, 802.11ad, 802.11ah , ≪ / RTI > 802.11ax, and the like. In other implementations, peer-to-peer connections or ad hoc networks may be implemented within WLAN 100.

[0051] In some cases, the STA 115 (or AP 105) may be detectable by the central AP 105, but by other STAs 115 of the coverage area 110 of the central AP 105 Not like that. For example, one STA 115 may be at one end of the coverage area 110 of the central AP 105 while another STA 115 may be at the other end. Thus, both STAs 115 may communicate with AP 105 but may not receive transmissions from other STAs. This may result in conflicting transmissions to two STAs 115 in a contention-based environment (e.g., CSMA / CA), since STAs 115 may not suppress transmission over overlapping one another . STAs 115 in the same coverage area 110 with non-identifiable transmissions can be known as hidden nodes. CSMA / CA may be supplemented by the exchange of RTS packets sent by the sending STA 115 (or AP 105) and CTS packets sent by the receiving STA 115 (or AP 105). Which may alert other devices in the range of the transmitter and receiver to not transmit during the duration of the primary transmission. Thus, the RTS / CTS can help mitigate the hidden node problem.

[0052] When the STA 115 enters the sleep mode, it can periodically wake up to receive the DTIM. The STA 115 may wake up early enough to activate the radio components used for DTIM reception. In some cases, the STA 115 may also wake early to resolve possible timing asynchronism with the AP 105. If the DTIM is not received at the expected time, the STA 115 may wait for the beacon loss timer to expire. When a DTIM (or standard TIM) is received, the STA 115 may wait for the indicated transmission until the content after beacon (CAB) timer expires. When the timer expires, the STA 115 may re-enter the sleep mode and wait for the next expected DTIM or beacon.

[0053] FIG. 2 illustrates an example of a wireless network 200 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. In FIG. 2, AP 105-a supports communication in different coverage areas 110. In some instances, the coverage areas 110 may support different RF spectrum bands or different operating bandwidth modes that may be associated with a particular RF spectrum band. For example, AP 105-a may support 80 MHz mode of operation in the coverage and coverage area 110-a in the 5 GHz spectrum band. In coverage area 110-b, AP 105-a may support communication in the 900 MHz spectrum band and a 20 MHz operating mode. In other cases, AP 105-a may support the same spectrum band in each of coverage areas 110-a and 110-b, but may support different bandwidth modes of operation. For example, AP 105-a may support a 160 MHz operating mode in coverage area 110-a and a 40 MHz operating mode in coverage area 110-b. Additionally, AP 105-a may support multiple RF spectrum bands and / or multiple operating bandwidth modes in coverage areas 110. In addition, Other RF spectrum bands and operating bandwidth modes may be considered without departing from the scope of the present disclosure.

[0054] As shown, the AP 105-a is serving a plurality of STAs 115-a, 115-b, 115-c, and 115-d in the coverage area 110-a. Also shown is AP 105-a serving STAs 115-e and 115-f located in coverage area 110-b. In some cases, the STA 115 may utilize power saving techniques and eventually enter sleep mode. For example, STAs 115-a and 115-f may communicate with APs 105-a (or other APs not shown) that may enter sleep mode and indicate that data may be available for transmission, (E.g., a machine type communications (MTC) device or a device that operates on battery power) that can periodically wake up to listen to a beacon from the device. In some cases, the beacon may be a DTIM beacon and may be transmitted by AP 105-a only if it is periodically transmitted by AP 105-a or data is queued at AP 105-a .

[0055] In some instances, STAs 115-a through 115-f may be maintained awake for the duration of each ITO interval that can be calculated based on the RF spectrum band or the associated operating bandwidth mode as well as the congestion level have. For example, the STA 115-a may determine the congestion level of the coverage area 110-a based on the ITO < RTI ID = 0.0 > The interval can be determined. The ITO interval may also be determined by STA 115-f located in coverage area 110-b. In this case, the congestion determined by the STA 115-f may be less than the congestion determined by the STA 115-a because the STA 115-a is the number of STAs operating in the coverage area 110- Gt; 110-a < / RTI > with more STAs 115 compared to the STAs 115 in FIG. As a result, STA 115-a can determine a longer ITO interval relative to STA 115-f due to higher congestion possibilities resulting in additional transmission delays. For example, the STA 115-a may determine that the ITO interval is 25 ms, while the STA 115-f may determine that the ITO interval is 15 ms.

[0056] In some instances, the congestion level may be determined based on a transmission frame count or a received frame count associated with a given STA 115. The congestion level may also be determined based on other activities on a particular channel or within the network. For example, if the STA 115 has a large number of receive frames, it may indicate that the STA 115 is receiving a large amount of data. In these cases, although the congestion of other activities on the network is relatively low, since the STA 115 is experiencing a large number of received frames, the congestion level may be determined to be greater than if the congestion level was determined based only on other activities , Which may also result in a different ITO interval decision by a given STA. In some cases, the congestion level may be determined based on a weighted factor or scaling associated with other activity and STA receiving activity. For example, in some environments, STA receive activity may be weighted higher than other activities on the channel or network, which may have a greater impact on the determined congestion level. Alternatively, other activities may be weighted over the STA receive activity, and thus other activities may have a greater impact on the determined congestion level.

[0057] The ITO interval for STAs 115-a and 115-f may also be determined based on the RF spectrum band. For example, in some cases, the congestion determined by STAs 115-a and 115-f may be similar because both STAs 115-a and 115-f both share the same AP 105-a ). In these cases, the ITO interval determined by STA 115-a may differ from the ITO interval determined by STA 115-f based on different RF spectrum bands or different operating bandwidth modes. For example, STA 115-f may be communicating in the 5 GHz spectrum band, and STA 115-a may be communicating in the 2.4 GHz spectrum band. In this case, the STA 115-f may determine a longer ITO interval than the STA 115-a.

[0058] In another example, STA 115-f may be communicating in the same band as STA 115-a, but may utilize different operating bandwidth modes. For example, while both STA 115-a and STA 115-f may operate in the 900 MHz spectrum band, STA 115-a may support a 20 MHz operating bandwidth mode while STA 115- 115-f) supports a 40 MHz operating bandwidth mode. In these cases, STA 115-a and STA 115-f may determine different respective ITO intervals. For example, STA 115-a may determine that the ITO interval is 50 ms, while STA 115-f may determine that each ITO interval is 100 ms.

[0059] In some cases, the AP 105-a transmits a sounding sequence to the STA, e.g., the STA 115-a, indicating that data may be sent to the STA 115-a in the near future can do. In these cases, STA 115-a may consider the interval between received sounding sequences when determining the number of sounding sequences received or the ITO interval from AP 105-a. In some examples, the ITO interval may be determined based on whether the interval between sounding sequences intersects the threshold or whether the number of received sounding sequences intersects the threshold. For example, if the interval between successive sounding sequences indicates an increasing tendency, this may be an indication that less data is expected to be sent to the STA 115-a, and therefore a shorter ITO interval is determined .

[0060] The ITO interval can also be determined for the current or subsequent awake interval. For example, the ITO interval can be determined for the current awake state before entering the sleep mode. In some cases, the ITO may be determined continuously or periodically (e.g., after a given time interval has elapsed). For example, instead of using the ITO interval determined in the subsequent awake interval, the ITO interval may be used in the current awake interval as determined based on congestion in the current awake interval. Thus, the ITO interval can be proactively adjusted, selected or determined to accommodate varying network congestion.

[0061] Figures 3A-3C illustrate examples of polling for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. 3A-3C may represent aspects of techniques performed by the STA 115 as described above with reference to FIGS. FIG. 3A illustrates a polling procedure in a STA that can save power.

[0062] In Fig. 3A, the STA listens for and receives a DTIM beacon 305-a that can be transmitted from the AP to the STA. The DTIM beacon 305-a may indicate that the AP has data packets to be transmitted to the STA.

[0063] Based on the DTIM beacon 305-a, the STA sends a PS-Poll (power-saving poll) message 310-a indicating that the STA is ready to receive queued data packets from the AP during the network sleep interval 335 To the AP. The AP responds to the PS-Poll message 310-a with the data packet (s), indicating that more data is waiting to be sent to the STA. Accordingly, the STA may request the awake interval 330-b for the ITO interval 315-a to receive data from the AP (e.g., as determined based on the techniques described with reference to Figs. 1 and 2) a). After the last transmission has been received and the ITO interval has expired, the STA enters the sleep mode for the sleep interval 335-a. During the sleep mode of the sleep interval 335-a, the STA may send a speculative PS-Poll (SPEC PS-Poll) 320-a to the AP to determine whether data for transmission to the STA is available at the AP have. 3A, the AP responds to the SPEC PS-Poll 320-a, indicating that more data is available for transmission, and the STA waits until the expiration of the ITO interval 315- Wake up to interval 330-b.

[0064] During the sleep interval 335-b, the STA may send another SPEC PS-Poll at 320-b to the AP, indicating that the AP has responded and there is no additional data to transmit. Thus, the STA remains in sleep mode, and then hears a beacon 325-a indicating that no data is available for transmission in this example.

[0065] In some cases, the AP may not respond to the PS-Poll or SPEC PS-Poll transmitted by the STA. For example, the STA may be moved outside the coverage area of the AP and may no longer receive messages from the AP. The AP may experience many problems or the network may have high congestion. Since it may be an unnecessary waste of power to continue polling the AP, it may be advantageous to modify the polling procedure in the STA based on the responses from the AP or the lack thereof.

[0066] In FIG. 3B, the STA listens for and receives DTIM beacons 305-b that may be transmitted from the AP to the STA. The DTIM beacon 305-a may indicate that the AP has data packets to be transmitted to the STA.

[0067] Based on the DTIM beacon 305-b, the STA sends a PS-Poll message (e. G., ≪ RTI ID = 0.0 > 310-b) to the AP. The AP responds to the PS-Poll message 310-b with the data packet (s) and indicates that more data is waiting to be sent to the STA. Thus, the STA may be able to determine the duration of the ITO interval 315-c (e.g., as determined based on the techniques described with reference to Figures 1 and 2) to receive additional data from the AP Mode. After the last transmission of additional data is received and the ITO interval has expired, the STA enters the sleep mode during the sleep interval 335-d. During the sleep mode, the STA may send a SPEC PS-Poll 320-c to the AP to determine whether data for transmission to the STA is available at the AP. As shown in FIG. 3B, the AP responds to the SPEC PS-Poll and indicates that no additional data is available for transmission.

[0068] At 340-a, the STA sends another SPEC PS-Poll to the AP to determine whether data for transmission to the STA is available at the AP. In this case, the STA receives a null message from the AP, or the AP does not respond to the SPEC PS-Poll after a response from the AP after the response timer has timed out. The STA then sends another SPEC PS-Poll at 340-b and either does not receive any response again or receives a null message. After another SPEC PS-Poll is sent in 340-c, without a response or a null message, the STA stops polling the AP for the rest of the sleep interval 345. In these cases, instead of continuing to poll the AP with the SPEC PS-Polls, if the STA receives a threshold number of null messages from the AP or experiences a threshold number of poll timeouts, b), the STA is kept in the sleep mode until the next beacon 325-b, thereby saving power. In this example, although three non-responses or timeouts are shown, other thresholds may be considered without departing from the scope of the present disclosure, and in some cases, the threshold number may be the beacons 305-b and 325- b. < / RTI > For example, if the interval between beacons 305-b and 325-b is less than 200 ms, the threshold may be 2, while if the interval between beacons 305-b and 325-b is greater than 200 ms, The threshold value may be 3 or more.

[0069] In some instances, the interval between polls may be based on the duration between beacons or the number of null messages or timeouts, as shown in FIG. 3C. 3C, the STA enters the sleep mode at 350 and transmits the SPEC PS-Poll (320-d) after the duration T1. As shown, the AP responds to the SPEC PS-Poll, indicating that no additional data is available for transmission. After the same duration T1 (e.g., periodically), the STA sends another SPEC PS-Poll 340-d. In this case, the AP either does not respond (poll time out) or the AP responds with a null message. Based on the lack of a null message or response from the AP, the STA may decide to send the next SPEC PS-Poll after the larger interval T2. In some cases, the interval T2 may be calculated based on the remaining time TR1 up to the next beacon 325-b. For example, T2 can be calculated to be either T1 or TR1 / 2, whichever is greater. In another example, if TR1 exceeds a given predetermined threshold (e.g., 200 ms, 300 ms, etc.), T2 may be calculated as TR1 / 3 or TR1 / 4.

[0070] After interval T2, the STA sends a SPEC PS-Poll 320-e and receives a response from the AP indicating that no additional data is available for transmission. Since the AP responds to SPEC PS-Poll 320-e, the STA may determine that the next SPEC PS-Poll 340-e will be transmitted after interval T1. In this case, the AP does not respond to the SPEC PS-Poll 340-e or the AP sends a null message. Therefore, the STA may decide to transmit the next SPEC PS-Poll 340-f after the interval T3. The interval T3 may be determined based on the remaining time TR2 up to the next beacon 325-b, or may be calculated similar to T1. After interval T3, the STA sends a SPEC PS-Poll 340-f and either does not receive any response from the AP or receives a null message. In this case, since the remaining time until the next beacon 325-b is less than T1, the STA decides not to transmit another SPEC PS-Poll.

[0071] It will be appreciated that while only the above examples are presented herein, various other examples can be used when determining the interval between PS-Polls or SPEC PS-Polls.

[0072] 4 illustrates a block diagram 400 of a wireless device 405 that supports adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The wireless device 405 may be an example of aspects of the STA 115 as described with reference to FIG. The wireless device 405 may include a receiver 410, an adaptive inactivity timeout manager 415, and a transmitter 420. The wireless device 405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more busses).

[0073] Receiver 410 may receive information such as packets, user data, or control information associated with various information channels (e.g., information related to control channels, data channels, and adaptive inactivity timeout management, etc.) . The information may be communicated to other components of the device. Receiver 410 may be an example of aspects of transceiver 735 described with reference to FIG.

[0074] The adaptive inactivity timeout manager 415 may be an example of aspects of the adaptive inactivity timeout manager 715 described with reference to FIG. The adaptive inactivity timeout manager 415 identifies the RF spectrum band used by the wireless device to communicate with the APs of the wireless communication network during the awake intervals in which the wireless device is in awake mode, Determine a congestion level associated with the RF spectrum band, and determine an ITO interval during which the wireless device remains in awake mode based on the identified RF spectrum band and the determined congestion level during the awake interval of the awake intervals.

[0075] The adaptive inactivity timeout manager 415 also allows the DTIM period to be determined, polls the AP for the duration of the DTIM and while the station is in the sleep mode, identifies that the trigger condition is satisfied, Based on a determination that a null data message has been received from the AP or that a predetermined threshold number of polls has timed out, or a combination thereof - the timing at which the station polls the AP based on identifying that the trigger condition is met Can be modified.

[0076] The adaptive inactivity timeout manager 415 also identifies a first activity level in the RF spectrum band used by the first wireless device based on the traffic sent to and received by the first wireless device, A device, comprising: means for identifying a second activity level in the RF spectrum band based on transmission and reception activity for at least one second wireless device, and determining a congestion level for the RF spectrum based on the first activity level and the second activity level And determine the ITO interval at which the wireless device is maintained in the awake mode based on the estimated congestion level during the awake interval in which the first wireless device is in the awake mode.

[0077] Transmitter 420 may transmit signals generated by other components of the device. In some instances, the transmitter 420 may be corroded with the receiver 410 of the transceiver module. For example, the transmitter 420 may be an example of aspects of the transceiver 735 described with reference to FIG. Transmitter 420 may comprise a single antenna or may comprise a set of antennas.

[0078] FIG. 5 illustrates a block diagram 500 of a wireless device 505 that supports adaptive inactivity timeout management in accordance with various aspects of the present disclosure. Wireless device 505 may be an example of aspects of wireless device 405 or STA 115 as described with reference to Figs. The wireless device 505 may include a receiver 510, an adaptive inactivity timeout manager 515, and a transmitter 520. The wireless device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more busses).

[0079] Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., information related to control channels, data channels, and adaptive inactivity timeout management, etc.) . The information may be communicated to other components of the device. Receiver 510 may be an example of aspects of transceiver 735 described with reference to FIG.

[0080] The adaptive inactivity timeout manager 515 may be an example of aspects of the adaptive inactivity timeout manager 715 described with reference to FIG. The adaptive inactivity timeout manager 515 also includes a communication manager 530, an RF band component 535, a congestion component 540, an ITO component 545, a DTIM component 550, a polling component 555, Component 560. < / RTI >

[0081] The communication manager 530 may communicate with the AP of the wireless communication network during the awake intervals when the wireless device is in awake mode. In some cases, the station and AP operate according to at least the MU-MIMO mode or the SU-MU mode or a combination thereof.

[0082] The RF band component 535 may identify the RF spectrum band used by the wireless device to communicate with the AP. In some cases, identifying the RF spectrum band used by the wireless device includes identifying a bandwidth mode of operation used by the wireless device to communicate with the AP.

[0083] In some cases, the operating bandwidth mode includes a 20 megahertz (MHz) bandwidth mode or a 40 MHz bandwidth mode or an 80 MHz bandwidth mode, or a 160 MHz bandwidth mode or an 80 + 80 MHz bandwidth mode, or a combination thereof. In some cases, identifying the RF spectrum band used by the wireless device includes identifying an RF spectrum range associated with the wireless communication network used by the wireless device to communicate with the AP. In some cases, the RF spectrum range used by the wireless communication network is associated with at least a 2.4 GHz (GHz) spectrum, or a 5 GHz spectrum or a 900 MHz spectrum, or a 60 GHz spectrum.

[0084] The congestion component 540 determines the congestion level associated with the RF spectrum band and determines the congestion level associated with the first (or second) frequency band in the radio frequency (RF) spectrum band used by the first wireless device based on the traffic sent to and received by the first wireless device. Identify a second activity level in the RF spectrum band based on transmission and reception activity for the at least one second wireless device at the first wireless device and identify the activity level at the first activity level and the second activity level The congestion level can be estimated based on the RF spectrum.

[0085] In some cases, determining the congestion level associated with the RF spectrum band includes determining a congestion level associated with the RF spectrum band during the first awake interval. In some cases, the congestion level is determined based on data received by the station in the RF spectrum band. In some cases, the congestion level is further determined based on other activities of the wireless communication network in the RF spectrum band. In some cases, estimating the congestion level may include scaling the first and second activity levels by applying a scaling factor associated with the awake interval, and scaling the first and second activity levels based on the scaled first and second activity levels, And estimating the congestion level for the band.

[0086] In some cases, the traffic sent to and received by the first wireless device includes unicast data that is transmitted to the first wireless device. In some cases, the transmit and receive activity for at least one second wireless device includes measurements of all wireless communication network activities in the RF spectrum band other than the transmit and receive traffic associated with the first wireless device.

[0087] ITO component 545 determines the ITO interval at which the wireless device remains in awake mode based on the identified RF spectrum band and the determined congestion level during the awake interval of the awake intervals, And determine the ITO interval at which the wireless device is maintained in awake mode based on the estimated congestion level during an awake interval when the first wireless device is in awake mode.

[0088] In some cases, determining the ITO interval includes determining the ITO interval at which the wireless device is maintained in the awake mode during the first or subsequent awake interval or a combination thereof. In some cases, determining the ITO interval includes receiving a plurality of sounding triggers, determining intervals between sounding triggers of the received multiple sounding sequences, and determining the interval between the sounding triggers based on the determined intervals . In some cases, determining the ITO interval includes determining that the congestion level associated with the RF spectrum band may be greater than a predetermined threshold for the identified RF spectrum band.

[0089] The DTIM component 550 may determine the duration of the DTIM.

[0090] The polling component 555 returns to polling the AP during the DTIM period and while the station is in the sleep mode and polling the AP for the second DTIM period according to the default timing, 2 corrects the default timing of polling the AP based on the identification, resumes polling the AP for the immediately following DTIM period, and corrects the timing at which the station polls the AP based on identifying that the trigger condition is satisfied For a set of polls sent from the station to the AP, to identify a set of time-out polls and to disable modifying the timing at which the station polls the AP based on a determination that the percentage is greater than a predetermined threshold have.

[0091] In some cases, polling the AP includes sending a number of guessing PS-Polls to the AP in a set of intervals based on the determined DTIM period. In some cases, modifying the timing involves identifying the remainder of the DTIM period and discontinuing polling the AP for the remainder of the DTIM period. In some cases, modifying the timing may include identifying a consecutive number of polls sent to the AP that times out from the station, and determining polling for the station based on a determination that the number of consecutive polls is greater than a predetermined threshold. . In some cases, polling the AP includes sending a number of PS-Polls to the AP in a set of intervals based on the number of null messages received from the AP or the threshold number of times out polls. In some cases, modifying the timing involves adjusting the time interval between the polls the station sends to the AP.

[0092] The trigger component 560 may identify that the trigger condition is satisfied and the trigger condition is based on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, do.

[0093] Transmitter 520 may transmit signals generated by other components of the device. In some instances, the transmitter 520 may be corroded with the receiver 510 of the transceiver module. For example, the transmitter 520 may be an example of aspects of the transceiver 735 described with reference to FIG. Transmitter 520 may comprise a single antenna or may comprise a set of antennas.

[0094] FIG. 6 shows a block diagram 600 of an adaptive inactivity timeout manager 615 that supports adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The adaptive inactivity timeout manager 615 includes an adaptive inactivity timeout manager 415, an adaptive inactivity timeout manager 515, or an adaptive inactivity timeout manager 515 described with reference to Figures 4, 5, May be an example of aspects of the inactivity timeout manager 715. The adaptive inactivity timeout manager 615 includes a communications manager 620, an RF band component 625, a congestion component 630, an ITO component 635, a DTIM component 640, a polling component 645, An association list component 650, an AP list component 655, an association component 660, and a block ACK component 665. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0095] The communication manager 620 may communicate with the APs of the wireless communication network during the awake intervals in which the wireless device is in awake mode. In some cases, the stations and APs operate according to at least a multi-user multiple input multiple output (MU-MIMO) mode or a single-user multi-client (SU-MC) mode or a combination thereof.

[0096] The RF band component 625 may identify a radio frequency (RF) spectrum band used by the wireless device to communicate with the AP. The congestion component 630 determines the congestion level associated with the RF spectrum band and determines the congestion level associated with the first (or second) radio frequency band in the radio frequency (RF) spectrum band used by the first wireless device based on the traffic sent to and received by the first wireless device Identify a second activity level in the RF spectrum band based on transmission and reception activity for the at least one second wireless device at the first wireless device and identify the activity level at the first activity level and the second activity level The congestion level for the RF spectrum can be estimated.

[0097] ITO component 635 determines the inactivity timeout (ITO) interval during which the wireless device remains awake mode based on the identified RF spectrum band and the determined congestion level during the awake interval of the awake intervals, Increasing an ITO interval maintained in a wake mode and determining an inactivity timeout (ITO) interval during which the wireless device remains in awake mode based on the estimated congestion level during an awake interval in which the first wireless device is in awake mode .

[0098] The DTIM component 640 may determine the duration of the DTIM.

[0099] The polling component 645 returns to polling the AP during the DTIM period and while the station is in the sleep mode and polling the AP for the second DTIM period according to the default timing, 2 corrects the default timing of polling the AP based on the identification, resumes polling the AP for the immediately following DTIM period, and corrects the timing at which the station polls the AP based on identifying that the trigger condition is satisfied For a set of polls sent from the station to the AP, to identify a set of time-out polls and to disable modifying the timing at which the station polls the AP based on a determination that the percentage is greater than a predetermined threshold have.

[0100] Trigger component 650 may identify that the trigger condition is satisfied and trigger condition may be based on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, do.

[0101] The AP list component 655 may add APs to the list of APs whose stations modified the timing and remove the APs from the list upon expiration of the lifetime factor associated with the APs.

[0102] Associated component 660 may re-associate the station with the AP after the station has modified the timing of polling the AP.

[0103] The block ACK component 665 may delete the first block ACK session based on the determination that the percentage is greater than the predetermined threshold and may activate the second block ACK session with the AP after deleting the first block ACK session.

[0104] FIG. 7 illustrates a diagram of a system 700 that includes a device 705 that supports adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The device 705 may be or may be an example of components of the wireless device 405, the wireless device 505, or the STA 115 as described above with reference to Figures 1, 4 and 5, for example. can do. The device 705 includes an adaptive inactivity timeout manager 715, a processor 720, a memory 725, software 730, a transceiver 735, an antenna 740 and / or an I / O controller 745, And components for two-way voice and data communications, including components for transmitting and receiving communications, including voice and data communications.

[0105] The processor 720 may be implemented using any of a wide variety of hardware and software such as an intelligent hardware device (e.g., a general purpose processor, a digital signal processor, a central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a field- Programmable logic device, discrete gate or transistor logic component, discrete hardware component, or any combination thereof). In some cases, the processor 720 may be configured to operate the memory array using a memory controller. In other instances, the memory controller may be integrated into the processor 720. [ The processor 720 may be configured to execute computer-readable instructions stored in memory to perform various functions (e. G., Functions or tasks that support adaptive inactivity timeout management).

[0106] Memory 725 may include random access memory (RAM) and read only memory (ROM). The memory 725 may store computer readable computer executable software 730 that includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 725 may include, among other things, a basic input-output system (BIOS) that can control basic hardware and / or software operations, such as interaction with peripheral components or devices .

[0107] Software 730 may include code for implementing aspects of the present disclosure including code for supporting adaptive inactivity timeout management. The software 730 may be stored in a non-volatile computer readable medium, such as system memory or other memory. In some cases, the software 730 may not be directly executable by the processor, but may cause the computer to perform the functions described herein (e.g., when compiled and executed).

[0108] The transceiver 735 can communicate wired or wireless links in both directions, via one or more antennas, as described above. For example, the transceiver 735 can represent a wireless transceiver and can communicate bidirectionally with other wireless transceivers. The transceiver 735 may also include a modem that modulates the packets, provides the modulated packets to the antennas for transmission, and demodulates the packets received from the antennas.

[0109] In some cases, the wireless device may include a single antenna 740. However, in some cases, the device may have more than one antenna 740 capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0110] The I / O controller 745 may manage the input and output signals to the device 705. The input / output control component 745 may also manage peripherals that are not integrated into the device 705. In some cases, the input / output control component 745 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 745 may be coupled to an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX® or other known operating systems Can be utilized.

[0111] FIG. 8 illustrates a flow diagram illustrating a method 800 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 800 may be implemented by STA 115 or its components as described herein. For example, the operations of method 800 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0112] At block 805, the STA 115 may communicate with the AP of the wireless communication network during the awake intervals during which the wireless device is in awake mode. The operations of block 805 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 805 may be performed by a communication manager as described with reference to Figs. 4-7.

[0113] At block 810, the STA 115 may identify the radio frequency (RF) spectrum band used by the wireless device to communicate with the AP. The operations of block 810 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 810 may be performed by an RF band component as described with reference to Figs. 4-7.

[0114] At block 815, the STA 115 may determine the congestion level associated with the RF spectrum band. The operations of block 815 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 815 may be performed by the congestion component as described with reference to Figs. 4-7.

[0115] At block 820, the STA 115 may determine an inactivity timeout (ITO) interval during which the wireless device remains in awake mode based on the identified RF spectrum band and the determined congestion level during the awake interval of the awake intervals have. The operations of block 820 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 820 may be performed by the ITO components as described with reference to Figs. 4-7.

[0116] FIG. 9 illustrates a flow diagram illustrating a method 900 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 900 may be implemented by STA 115 or its components as described herein. For example, the operations of method 900 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0117] At block 905, the STA 115 may determine the duration of the DTIM. The operations of block 905 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 905 may be performed by a DTIM component as described with reference to Figs. 4-7.

[0118] At block 910, the STA 115 may poll the AP for the duration of the DTIM and while the station is in the sleep mode. The operations of block 910 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 910 may be performed by a polling component as described with reference to Figs. 4-7.

[0119] At block 915, the STA 115 may identify that the trigger condition is satisfied, and the trigger condition may include a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, Based on a combination of these. The operations of block 915 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 915 may be performed by the trigger component as described with reference to Figs. 4-7.

[0120] At block 920, the STA 115 may modify the timing at which the station polls the AP based on identifying that the trigger condition is satisfied. The operations of block 920 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 920 may be performed by a polling component as described with reference to Figs. 4-7.

[0121] FIG. 10 shows a flow diagram illustrating a method 1000 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 1000 may be implemented by STA 115 or its components as described herein. For example, operations of method 1000 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0122] At block 1005, the STA 115 may determine a delivery traffic indication message (DTIM) period. The operations of block 1005 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1005 may be performed by a DTIM component as described with reference to Figs. 4-7.

[0123] At block 1010, the STA 115 may poll the AP for the duration of the DTIM and while the station is in the sleep mode. The operations of block 1010 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1010 may be performed by a polling component as described with reference to Figs. 4-7.

[0124] At block 1015, the STA 115 may identify that the trigger condition is satisfied, and the trigger condition may include a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, Based on a combination of these. The operations of block 1015 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1015 may be performed by a trigger component as described with reference to Figs. 4-7.

[0125] At block 1020, the STA 115 may modify the timing at which the station polls the AP based on identifying that the trigger condition is satisfied. The operations of block 1020 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1020 may be performed by a polling component as described with reference to Figures 4-7.

[0126] At block 1025, the STA 115 may add the AP to the list of APs whose station has modified the timing. The operations of block 1025 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1025 may be performed by an AP list component as described with reference to Figures 4-7.

[0127] At block 1030, the STA 115 may remove the AP from the list upon expiration of the lifetime factor associated with the AP. The operations of block 1030 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1030 may be performed by an AP list component as described with reference to Figs. 4-7.

[0128] FIG. 11 shows a flow chart illustrating a method 1100 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 1100 may be implemented by STA 115 or its components as described herein. For example, the operations of method 1100 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0129] At block 1105, the STA 115 may determine the DTIM duration. The operations of block 1105 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1105 may be performed by a DTIM component as described with reference to Figs. 4-7.

[0130] At block 1110, the STA 115 may poll the AP for the duration of the DTIM and while the station is in the sleep mode. The operations of block 1110 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1110 may be performed by a polling component as described with reference to Figs. 4-7.

[0131] At block 1115, the STA 115 may identify that the trigger condition has been satisfied and the trigger condition may include a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, Based on a combination of these. The operations of block 1115 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1115 may be performed by the trigger component as described with reference to Figs. 4-7.

[0132] At block 1120, the STA 115 may modify the timing at which the station polls the AP based on identifying that the trigger condition is satisfied. The operations of block 1120 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1120 may be performed by a polling component as described with reference to Figures 4-7.

[0133] At block 1125, the STA 115 may reassociate with the AP after modifying the timing at which the station polls the AP. The operations of block 1125 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1125 may be performed by an associated component as described with reference to Figs. 4-7.

[0134] At block 1130, the STA 115 may return to polling the AP during the second DTIM period according to the default timing. The operations of block 1130 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1130 may be performed by a polling component as described with reference to Figures 4-7.

[0135] At block 1135, the STA 115 may modify the default timing at which the station polls the AP based on the second identification that the trigger condition has been met during the second DTIM period. The operations of block 1135 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1135 may be performed by a polling component as described with reference to Figs. 4-7.

[0136] Figure 12 shows a flow diagram illustrating a method 1200 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 1200 may be implemented by STA 115 or its components as described herein. For example, the operations of method 1200 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0137] At block 1205, the STA 115 may determine the DTIM duration. The operations of block 1205 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1205 may be performed by a DTIM component as described with reference to Figs. 4-7.

[0138] At block 1210, the STA 115 may poll the AP for the duration of the DTIM and while the station is in the sleep mode. The operations of block 1210 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1210 may be performed by a polling component as described with reference to Figures 4-7.

[0139] At block 1215, the STA 115 may identify that the trigger condition has been met and the trigger condition is determined by determining that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, Based on a combination of these. The operations of block 1215 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1215 may be performed by the trigger component as described with reference to Figs. 4-7.

[0140] At block 1220, the STA 115 may modify the timing at which the station polls the AP based on identifying that the trigger condition is satisfied. The operations of block 1220 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1220 may be performed by a polling component as described with reference to Figs. 4-7.

[0141] At block 1225, the STA 115 may identify the remainder of the DTIM period and cease polling the AP for the remainder of the DTIM period. The operations of block 1225 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1225 may be performed by a polling component as described with reference to Figures 4-7.

[0142] At block 1230, the STA 115 may resume polling the AP for the immediately following DTIM period. The operations of block 1230 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1230 may be performed by a polling component as described with reference to Figs. 4-7.

[0143] FIG. 13 shows a flow chart illustrating a method 1300 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 1300 may be implemented by STA 115 or its components as described herein. For example, the operations of method 1300 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0144] At block 1305, the STA 115 may determine the duration of the DTIM. The operations of block 1305 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1305 may be performed by a DTIM component as described with reference to Figs. 4-7.

[0145] At block 1310, the STA 115 may poll the AP for the duration of the DTIM and while the station is in the sleep mode. The operations of block 1310 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1310 may be performed by a polling component as described with reference to Figs. 4-7.

[0146] At block 1315, the STA 115 may identify that the trigger condition has been met and the trigger condition is determined by a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, Based on a combination of these. The operations of block 1315 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1315 may be performed by a trigger component as described with reference to Figs. 4-7.

[0147] At block 1320, the STA 115 may modify the timing at which the station polls the AP based on identifying that the trigger condition is satisfied. The operations of block 1320 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1320 may be performed by a polling component as described with reference to Figs. 4-7.

[0148] At block 1325, the STA 115 may identify the percentage of the set of paused time-outs for the set of polls sent from the station to the AP. The operations of block 1325 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1325 may be performed by a polling component as described with reference to Figs. 4-7.

[0149] At block 1330, the STA 115 may disable modifying the timing at which the station polls the AP based on a determination that the percentage is greater than a predetermined threshold. The operations of block 1330 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1330 may be performed by a polling component as described with reference to Figs. 4-7.

[0150] FIG. 14 shows a flow chart illustrating a method 1400 for adaptive inactivity timeout management in accordance with various aspects of the present disclosure. The operations of method 1400 may be implemented by STA 115 or its components as described herein. For example, the operations of method 1400 may be performed by an adaptive inactivity timeout manager as described with reference to Figs. 4-7. In some instances, the STA 115 may execute a set of codes for controlling the functional elements of the device to perform the functions described below. Additionally or alternatively, the STA 115 may utilize special purpose hardware to perform aspects of the functions described below.

[0151] At block 1405, the STA 115 may identify a first activity level in the RF spectrum band used by the first wireless device based on the traffic sent to and received by the first wireless device. The operations of block 1405 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1405 may be performed by the congestion component as described with reference to Figs. 4-7.

[0152] At block 1410, the STA 115 may, at the first wireless device, identify a second activity level in the RF spectrum band based on transmission and reception activity for the at least one second wireless device. The operations of block 1410 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1410 may be performed by the congestion component as described with reference to Figs. 4-7.

[0153] At block 1415, the STA 115 may estimate the congestion level for the RF spectrum based on the first activity level and the second activity level. The operations of block 1415 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1415 may be performed by the congestion component as described with reference to Figs. 4-7.

[0154] At block 1420, the STA 115 may determine the ITO interval at which the wireless device is maintained in awake mode based on the estimated congestion level during the awake interval when the first wireless device is in awake mode. The operations of block 1420 may be performed according to the methods described with reference to Figures 1-3. In certain instances, aspects of the operations of block 1420 may be performed by the ITO components as described with reference to Figs. 4-7.

[0155] It should be noted that the methods described above describe possible implementations, operations and steps may be rearranged or otherwise modified, and other implementations are possible. Also aspects from two or more of the methods can be combined.

[0156] The techniques described herein may be used for various applications such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC- ≪ / RTI > and other systems. The terms "system" and "network" are often used interchangeably. A code division multiple access (CDMA) system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 releases may be referred to generally as CDMA2000 1X, 1X, and the like. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A time division multiple access (TDMA) system can implement radio technologies such as Global System for Mobile Communications (GSM). An orthogonal frequency division multiple access (OFDMA) system is a radio system such as UMB (Ultra Mobile Broadband), E-UTRA, Wi-Fi, IEEE 802.16 Technology can be implemented.

[0157] The wireless communication systems or systems described herein may support synchronous or asynchronous operation. In the case of synchronous operation, stations may have similar frame timing and transmissions from different stations may be roughly time aligned. In the case of asynchronous operation, stations may have different frame timings, and transmissions from different stations may not be time aligned. The techniques described herein may be used for synchronous or asynchronous operations.

[0158] The downlink transmissions described herein may also be referred to as forward link transmissions, while uplink transmissions may also be referred to as reverse link transmissions. For example, each of the communication links described herein, including the wireless networks 100 and 200 of FIGS. 1 and 2, may include one or more carriers, where each carrier includes a plurality of sub- (E. G., Waveform signals at different frequencies).

[0159] The description set forth herein with respect to the accompanying drawings illustrates exemplary configurations and is not intended to represent all instances that may be or may be practiced within the scope of the claims. As used herein, the term " exemplary " means " serving as an example, illustration, or illustration, " The detailed description includes specific details for the purpose of providing an understanding of the techniques described. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0160] In the accompanying drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by a second label that distinguishes between dashes and similar components after the reference label. If only a first reference label is used herein, the description is applicable to any of the similar components having the same first reference label regardless of the second reference label.

[0161] It will be appreciated that the information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and chips that may be referenced throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields, , Light fields or light particles, or any combination thereof.

[0162] The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, Or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a digital signal processor (DSP) and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) It is possible.

[0163] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, these functions may be stored on or transmitted via one or more instructions or code to a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of the software, the functions described above may be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by the processor. Features that implement functions may also be located at physically different locations, including that portions of the functions are distributed such that they are implemented at different physical locations. Also, as used herein, including claims, the term "used in a list of items (e.g., a list of items followed by a phrase such as" at least one of & Represents a list inclusive such that, for example, the list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (ie, A and B and C).

[0164] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Non-volatile storage media may be any available media accessible by a general purpose or special purpose computer. By way of example, and not limitation, non-volatile computer readable media may comprise volatile and nonvolatile memory such as RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disk (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, Or may be used to transfer or store desired program code means in the form of instructions or data structures, and may include general purpose or special purpose computers or any other non-transitory medium accessible by a general purpose or special purpose processor. Also, any connection is properly referred to as a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using wireless technologies such as coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or infrared, radio and microwave, Wireless technologies such as coaxial cable, fiber optic cable, twisted pair, DSL, or infrared, radio and microwave are included in the definition of the medium. Disks and discs as used herein include, but are not limited to, CD, laser disc, optical disc, digital versatile disc (DVD), floppy disc, Wherein the discs usually reproduce the data magnetically, while the discs optically reproduce the data by the lasers. Combinations of the above are also encompassed within the scope of computer readable media.

[0165] The description herein is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the present disclosure. The present disclosure, therefore, is not to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (59)

A method for wireless communication in a wireless device,
The wireless device communicating with an access point (AP) of the wireless communication network during awake intervals in an awake mode;
Identifying a radio frequency (RF) spectrum band used by the wireless device to communicate with the AP;
Determining a congestion level associated with the RF spectrum band; And
Determining an inactivity timeout (ITO) interval at which the wireless device remains in the awake mode based at least in part on an identified RF spectrum band and a determined congestion level during an awake interval of the awake intervals. Method for wireless communication. The method according to claim 1,
Wherein identifying the RF spectrum band used by the wireless device comprises:
And identifying a bandwidth mode of operation used by the wireless device to communicate with the AP. 3. The method of claim 2,
Wherein the operating bandwidth mode comprises a 20 megahertz (MHz) bandwidth mode or a 40 MHz bandwidth mode or an 80 MHz bandwidth mode, or a 160 MHz bandwidth mode or an 80 + 80 MHz bandwidth mode or a combination thereof. The method according to claim 1,
Wherein identifying the RF spectrum band used by the wireless device comprises:
Identifying an RF spectrum range associated with the wireless communication network used by the wireless device to communicate with the AP. 5. The method of claim 4,
Wherein the RF spectrum range used by the wireless communication network is associated with at least a 2.4 GHz spectrum, or a 5 GHz spectrum or a 900 MHz spectrum, or a 60 GHz spectrum, or a combination thereof. The method according to claim 1,
Wherein determining the congestion level associated with the RF spectrum band comprises:
Determining a congestion level associated with the RF spectrum band during a first awake interval;
Wherein determining the ITO interval comprises determining the ITO interval at which the wireless device is maintained in the awake mode during the first or subsequent awake interval or a combination thereof. . The method according to claim 1,
Wherein determining the ITO interval comprises:
Comprising: receiving a plurality of sounding triggers; determining intervals between sounding triggers of a plurality of received sounding sequences; and determining the ITO based at least in part on the determined intervals. Method for wireless communication. The method according to claim 1,
Wherein determining the ITO interval comprises:
Determining that the congestion level associated with the RF spectrum band is greater than a predetermined threshold for the identified RF spectrum band; And
And increasing the ITO interval at which the wireless device is maintained in the awake mode. The method according to claim 1,
Wherein the station and the AP operate according to at least a multi-user multiple input multiple output (MU-MIMO) mode or a single-user multi-client (SU-MC) mode or a combination thereof. The method according to claim 1,
Wherein the congestion level is determined based at least in part on data received by the station in the RF spectrum band. 11. The method of claim 10,
Wherein the congestion level is further determined based at least in part on other activities of the wireless communication network in the RF spectrum band. A method for wireless communication at a station,
Determining a delivery traffic indication message (DTIM) period;
Polling an access point (AP) during the DTIM period and while the station is in sleep mode;
Wherein the trigger condition is based at least in part on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out or a combination thereof, ; And
And modifying a timing at which the station polls the AP based at least in part on identifying that the trigger condition is met. 13. The method of claim 12,
Further comprising adding the AP to the list of APs whose station has modified the timing. 14. The method of claim 13,
And removing the AP from the list upon expiration of a lifetime factor associated with the AP. 13. The method of claim 12,
Re-associating with the AP after the station corrects the timing of polling the AP;
Returning to polling the AP for a second DTIM period according to a default timing; And
Further comprising modifying the default timing at which the station polls the AP based at least in part on a second identification that the trigger condition was met during the second DTIM period. 13. The method of claim 12,
Wherein the step of modifying the timing comprises:
Identifying the remainder of the DTIM period, and ceasing to poll the AP for the remainder of the DTIM period. 17. The method of claim 16,
And resuming polling the AP for a duration of the DTIM immediately following the DTIM period. 13. The method of claim 12,
Wherein the step of modifying the timing comprises:
And adjusting the time interval between the polls the station transmits to the AP. 13. The method of claim 12,
Wherein the step of modifying the timing comprises:
Identifying a consecutive number of polls sent to the AP that has timed out from the station and disabling polling for the station based at least in part on a determination that the number of consecutive polls is greater than a predetermined threshold A method for wireless communication. 13. The method of claim 12,
Identifying, for a plurality of polls transmitted from the station to the AP, a percentage of a plurality of polls that are timed out; And
Further comprising disabling the station to modify the timing of polling the AP based at least in part upon a determination that the percentage is greater than a predetermined threshold. 13. The method of claim 12,
Deleting a first block acknowledgment (ACK) session based at least in part upon a determination that the percentage of a plurality of polls that are timed out is greater than a predetermined threshold; And
Further comprising: after the first block ACK session is deleted, activating a second block ACK session with the AP. 13. The method of claim 12,
Wherein the polling the AP comprises:
Sending, to the AP, a plurality of power-saving polls (PS-Poll) at a plurality of intervals based at least in part on the number of null messages received from the AP or a threshold number of time- out polls. Method for communication. 13. The method of claim 12,
Wherein the polling the AP comprises:
And sending a plurality of speculative power-saving polls (PS-Poll) to the APs at a plurality of intervals based at least in part on the determined DTIM period. A method for wireless communication in a wireless device,
Identifying a first activity level in a radio frequency (RF) spectrum band used by the first wireless device based at least in part on the traffic sent to and received by the first wireless device;
Identifying, at the first wireless device, a second activity level in the RF spectrum band based at least in part on transmission and reception activity for at least one second wireless device;
Estimating a congestion level for the RF spectrum band based at least in part on the first activity level and the second activity level; And
Determining an inactivity timeout (ITO) interval at which the wireless device remains in the awake mode based at least in part on an estimated congestion level during an awake interval in which the first wireless device is in an awake mode, , A method for wireless communication. 25. The method of claim 24,
Wherein the step of estimating the congestion level comprises:
Scaling the first and second activity levels by applying a scaling factor associated with the awake interval; And
And estimating a congestion level for the RF spectrum band based at least in part on the scaled first and second activity levels. 25. The method of claim 24,
Wherein the traffic sent to and received by the first wireless device comprises unicast data sent to the first wireless device. 25. The method of claim 24,
Wherein the transmit and receive activity for at least one second wireless device comprises a measurement of all wireless communication network activities in the RF spectrum band other than transmit and receive traffic associated with the first wireless device. An apparatus for wireless communication in a wireless device,
In the system,
A processor;
A memory in electronic communication with the processor; And
Instructions stored in the memory,
Wherein the instructions, when executed by the processor, cause the device to:
Cause the wireless device to communicate with an access point (AP) of the wireless communication network during the awake intervals in the awake mode;
Identify a radio frequency (RF) spectrum band used by the wireless device to communicate with the AP;
Determine a congestion level associated with the RF spectrum band;
Wherein the wireless device is operable to determine, during an awake interval of the awake intervals, an inactivity timeout (ITO) interval at which the wireless device remains in the awake mode based at least in part on an identified RF spectrum band and a determined congestion level. Apparatus for communication. 29. The method of claim 28,
Instructions executable by the processor to identify the RF spectrum band used by the wireless device include:
And instructions executable by the processor to identify a bandwidth mode of operation used by the wireless device to communicate with the AP. 30. The method of claim 29,
Wherein the operating bandwidth mode comprises a 20 megahertz (MHz) bandwidth mode or a 40 MHz bandwidth mode or an 80 MHz bandwidth mode, or a 160 MHz bandwidth mode or an 80 + 80 MHz bandwidth mode or a combination thereof. 29. The method of claim 28,
Instructions executable by the processor to identify the RF spectrum band used by the wireless device include:
And instructions executable by the processor to identify an RF spectrum range associated with the wireless communication network used by the wireless device to communicate with the AP. 32. The method of claim 31,
Wherein the RF spectrum range used by the wireless communication network is associated with at least a 2.4 GHz spectrum or a 5 GHz spectrum or a 900 MHz spectrum or a 60 GHz spectrum or a combination thereof. 29. The method of claim 28,
Instructions executable by the processor to determine a congestion level associated with the RF spectrum band include instructions executable by the processor to determine a congestion level associated with the RF spectrum band during a first awake interval;
Wherein the instructions executable by the processor to determine the ITO interval cause the processor to determine the ITO interval during which the wireless device is maintained in the awake mode during the first or subsequent awake interval or a combination thereof And < RTI ID = 0.0 > executable instructions. ≪ / RTI > 29. The method of claim 28,
Instructions executable by the processor to determine the ITO interval,
Receive a plurality of sounding triggers;
Determine intervals between sounding triggers of a plurality of received sounding sequences;
And instructions executable by the processor to determine the ITO interval based at least in part on the determined intervals. 29. The method of claim 28,
Instructions executable by the processor to determine the ITO interval,
Determine that the congestion level associated with the RF spectrum band is greater than a predetermined threshold for the identified RF spectrum band;
Wherein the wireless device includes instructions executable by the processor to increase an ITO interval in which the wireless device is maintained in the awake mode. 29. The method of claim 28,
Wherein the station and the AP operate in at least a multi-user multiple input multiple output (MU-MIMO) mode or a single-user multi-client (SU-MC) mode or a combination thereof. 29. The method of claim 28,
Wherein the congestion level is determined based at least in part on data received by the station in the RF spectrum band. An apparatus for wireless communication in a station,
In the system,
A processor;
A memory in electronic communication with the processor; And
Instructions stored in the memory,
Wherein the instructions, when executed by the processor, cause the device to:
Determine a delivery traffic indication message (DTIM) period;
To poll an access point (AP) during the DTIM period and while the station is in sleep mode;
Wherein the trigger condition is based at least in part on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out or a combination thereof, ;
And to cause the station to modify the timing of polling the AP based at least in part upon identifying that the trigger condition is met. 39. The method of claim 38,
The instructions,
Wherein the station is further executable by the processor to add an AP to the list of APs that modified the timing. 40. The method of claim 39,
The instructions,
Wherein the AP is further executable by the processor to remove the AP from the list upon expiration of a lifetime factor associated with the AP. 39. The method of claim 38,
The instructions,
Re-associating with the AP after the station corrects the timing of polling the AP;
Returning to polling the AP for a second DTIM period according to a default timing;
Wherein the station is further executable by the processor to modify the default timing at which the station polls the AP based at least in part on a second identification that the trigger condition is met during the second DTIM period. 39. The method of claim 38,
Instructions executable by the processor to modify the timing,
Identify the remaining portion of the DTIM period;
Instructions for causing the processor to suspend polling the AP for the remainder of the DTIM period. 43. The method of claim 42,
The instructions,
Wherein the AP is further executable by the processor to resume polling the AP for a duration of the DTIM immediately following. 39. The method of claim 38,
Instructions executable by the processor to modify the timing,
And instructions executable by the processor to adjust a time interval between polls the station transmits to the AP. 39. The method of claim 38,
Instructions executable by the processor to modify the timing,
Identify a consecutive number of polls sent to the AP that times out from the station;
And instructions that are executable by the processor to disable polling for the station based at least in part on a determination that the number of consecutive polls is greater than a predetermined threshold. 39. The method of claim 38,
The instructions,
Identify, for a plurality of polls transmitted from the station to the AP, a percentage of a plurality of polls that have timed out;
And to disable modifying the timing at which the station polls the AP based at least in part upon a determination that the percentage is greater than a predetermined threshold. 39. The method of claim 38,
The instructions,
Delete the first block acknowledgment (ACK) session based at least in part upon a determination that the percentage of the plurality of polls that are timed out is greater than a predetermined threshold;
Wherein the second block ACK session is further executable by the processor to delete a first block ACK session and then activate a second block ACK session with the AP. 39. The method of claim 38,
Instructions executable by the processor to poll the AP include:
Executed by the processor to transmit a plurality of power-saving polls (PS-Poll) to the AP at a plurality of intervals based at least in part on the number of null messages received from the AP or the threshold number of time- ≪ / RTI > 39. The method of claim 38,
Instructions executable by the processor to poll the AP include:
Instructions for execution by the processor to send a plurality of speculative power-saving polls (PS-Poll) to the APs at a plurality of intervals based at least in part on the determined DTIM period. An apparatus for wireless communication in a first wireless device,
In the system,
A processor;
A memory in electronic communication with the processor; And
Instructions stored in the memory,
Wherein the instructions, when executed by the processor, cause the device to:
Identify a first activity level in a radio frequency (RF) spectrum band used by the first wireless device based at least in part on traffic sent to and received by the first wireless device;
Identify, at the first wireless device, a second activity level in the RF spectrum band based at least in part on transmission and reception activity for the at least one second wireless device;
Estimate a congestion level for the RF spectrum band based at least in part on the first activity level and the second activity level;
Wherein the wireless device is operable to cause the wireless device to determine an inactivity timeout (ITO) interval maintained in the awake mode based at least in part on an estimated congestion level during an awake interval in which the first wireless device is in an awake mode, Apparatus for wireless communication. 51. The method of claim 50,
Instructions executable by the processor to estimate the congestion level,
Scaling the first and second activity levels by applying a scaling factor associated with the awake interval and estimating the congestion level for the RF spectrum band based at least in part on the scaled first and second activity levels And instructions executable by the processor. 51. The method of claim 50,
Wherein the traffic sent to and received by the first wireless device comprises unicast data sent to the first wireless device. 51. The method of claim 50,
Wherein the transmit and receive activity for at least one second wireless device comprises measurement of all wireless communication network activities in the RF spectrum band other than transmit and receive traffic associated with the first wireless device. An apparatus for wireless communication in a wireless device,
Means for the wireless device to communicate with an access point (AP) of the wireless communication network during the awake intervals in the awake mode;
Means for identifying a radio frequency (RF) spectrum band used by the wireless device to communicate with the AP;
Means for determining a congestion level associated with the RF spectrum band; And
Means for determining, during an awake interval of the awake intervals, an inactivity timeout (ITO) interval at which the wireless device is maintained in the awake mode based at least in part on an identified RF spectrum band and a determined congestion level , A device for wireless communication. An apparatus for wireless communication in a station,
Means for determining a delivery traffic indication message (DTIM) period;
Means for polling an access point (AP) during the DTIM period and while the station is in a sleep mode;
Means for identifying that a trigger condition is met, the trigger condition being based at least in part on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out or a combination thereof -; And
And means for modifying the timing at which the station polls the AP based at least in part upon identifying that the trigger condition is met. An apparatus for wireless communication in a first wireless device,
Means for identifying a first activity level in a radio frequency (RF) spectrum band used by the first wireless device based at least in part on traffic sent to and received by the first wireless device;
Means for identifying, at the first wireless device, a second activity level in the RF spectrum band based at least in part on transmit and receive activity for at least one second wireless device;
Means for estimating a congestion level for the RF spectrum based at least in part on a first activity level and a second activity level; And
And means for determining an inactivity timeout (ITO) interval at which the wireless device is maintained in the awake mode based at least in part on an estimated congestion level during an awake interval in which the first wireless device is in an awake mode A device for wireless communication. A non-transitory computer readable storage medium for storing a code for wireless communication in a wireless device,
The code includes:
The wireless device communicates with an access point (AP) of the wireless communication network during the awake intervals in the awake mode;
Identify a radio frequency (RF) spectrum band used by the wireless device to communicate with the AP;
Determine a congestion level associated with the RF spectrum band;
Executable by the processor to determine an inactivity timeout (ITO) interval during which the wireless device remains in the awake mode based at least in part on an identified RF spectrum band and a determined congestion level during an awake interval of the awake intervals ≪ / RTI > instructions. A non-transitory computer readable storage medium storing a code for wireless communication at a station,
The code includes:
Determining a delivery traffic indication message (DTIM) period;
Polling an access point (AP) during the DTIM period and while the station is in sleep mode;
Wherein the trigger condition is based at least in part on a determination that at least one null data message has been received from the AP or that a predetermined threshold number of polls has timed out, or a combination thereof;
Instructions that are executable by the processor to modify a timing at which the station polls the AP based at least in part upon identifying that the trigger condition is met. A non-transitory computer readable storage medium for storing a code for wireless communication in a wireless device,
The code includes:
Identify a first activity level in a radio frequency (RF) spectrum band used by the first wireless device based at least in part on the traffic sent to and received by the first wireless device;
Identify, at the first wireless device, a second activity level in the RF spectrum band based at least in part on transmit and receive activity for at least one second wireless device;
Estimate a congestion level for the RF spectrum based at least in part on the first activity level and the second activity level;
Wherein the first wireless device is executed by the processor to determine an inactivity timeout (ITO) interval during which the wireless device remains in the awake mode based at least in part on an estimated congestion level during an awake mode in an awake mode ≪ / RTI > comprising instructions that are executable by the computer.

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