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WO2018057363A1 - Procédé et appareil de sélection adaptative de seuil dans des économies d'énergie par paquets obss - Google Patents

Procédé et appareil de sélection adaptative de seuil dans des économies d'énergie par paquets obss Download PDF

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Publication number
WO2018057363A1
WO2018057363A1 PCT/US2017/051325 US2017051325W WO2018057363A1 WO 2018057363 A1 WO2018057363 A1 WO 2018057363A1 US 2017051325 W US2017051325 W US 2017051325W WO 2018057363 A1 WO2018057363 A1 WO 2018057363A1
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WO
WIPO (PCT)
Prior art keywords
obss
threshold
access point
transmissions
throughput parameters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/051325
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English (en)
Inventor
Shao-Chi Lu
Sandip Homchaudhuri
Zhanfeng Jia
Pradeep Kumar Yenganti
Alireza Raissinia
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Qualcomm Inc
Original Assignee
Qualcomm Inc
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Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to AU2017330524A priority Critical patent/AU2017330524A1/en
Publication of WO2018057363A1 publication Critical patent/WO2018057363A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the following relates generally to wireless communication and more specifically to adaptive nap threshold selection in an overlapping basic service set (OBSS) packet power save (PPS).
  • OBSS overlapping basic service set
  • PPS packet power save
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power).
  • a wireless network for example a wireless local area network (WLAN), such as a Wi-Fi (i.e., IEEE 802.11) network may include access point (AP) that may communicate with one or more stations (STAs) or mobile devices.
  • the AP may be coupled to a network, such as the Internet, and may enable a mobile device to communicate via the network (or communicate with other devices coupled to the access point).
  • a wireless device may communicate with a network device bi-directionally.
  • an STA may communicate with an associated AP via downlink (DL) and uplink (UL).
  • DL or forward link
  • UL or reverse link
  • a group of STAs that are communicating with an AP may be known as a basic service set (BSS).
  • BSS basic service set
  • the area of one BSS may overlap with the area of another BSS, which may be known as an OBSS. Transmissions from different devices within the OBSS may interfere with one another.
  • Research and development continue to advance communication technologies to reduce power consumption of an STA.
  • a method of wireless communication includes monitoring, by a mobile device, transmissions from at least one overlapping basic service set (OBSS) access point.
  • the method additionally includes activating, by the mobile device, a dynamic OBSS packet power save (PPS) in response to the transmissions from the at least one OBSS access point exceeding a predefined threshold, wherein the dynamic OBSS PPS is activated with an initial nap threshold.
  • the method also includes monitoring, by the mobile device, a set of throughput parameters in response to the activating, wherein the monitored set of throughput parameters is associated with throughput of a basic service set (BSS) access point.
  • the method further includes adjusting, by the mobile device, the initial nap threshold in response to changes in one or more throughput parameters of the set of throughput parameters.
  • BSS basic service set
  • an apparatus configured for wireless communication.
  • the apparatus includes means for monitoring, by a mobile device, transmissions from at least one overlapping basic service set (OBSS) access point.
  • the apparatus additionally includes means for activating, by the mobile device, a dynamic OBSS packet power save (PPS) in response to the transmissions from the at least one OBSS access point exceeding a predefined threshold, wherein the dynamic OBSS PPS is activated with an initial nap threshold.
  • the apparatus also includes means for monitoring, by the mobile device, a set of throughput parameters in response to the activating, wherein the monitored set of throughput parameters is associated with throughput of a basic service set (BSS) access point.
  • the apparatus further includes, means for adjusting, by the mobile device, the initial nap threshold in response to changes in one or more throughput parameters of the set of throughput parameters.
  • a non-transitory computer-readable medium has program code recorded thereon.
  • the program code includes program code for monitoring, by a mobile device, transmissions from at least one overlapping basic service set (OBSS) access point.
  • the program code additionally includes program code for activating, by the mobile device, a dynamic OBSS packet power save (PPS) in response to the transmissions from the at least one OBSS access point exceeding a predefined threshold, wherein the dynamic OBSS PPS is activated with an initial nap threshold.
  • the program code also includes program code for monitoring, by the mobile device, a set of throughput parameters in response to the activating, wherein the monitored set of throughput parameters is associated with throughput of a basic service set (BSS) access point.
  • the program code further includes program code for adjusting, by the mobile device, the initial nap threshold in response to changes in one or more throughput parameters of the set of throughput parameters.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to monitor, by a mobile device, transmissions from at least one overlapping basic service set (OBSS) access point.
  • the processor is additionally configured to activate, by the mobile device, a dynamic OBSS packet power save (PPS) in response to the transmissions from the at least one OBSS access point exceeding a predefined threshold, wherein the dynamic OBSS PPS is activated with an initial nap threshold.
  • PPS dynamic OBSS packet power save
  • the processor is also configured to monitor, by the mobile device, a set of throughput parameters in response to the activating, wherein the monitored set of throughput parameters is associated with throughput of a basic service set (BSS) access point.
  • the processor is further configured to adjust, by the mobile device, the initial nap threshold in response to changes in one or more throughput parameters of the set of throughput parameters.
  • FIG. 1 illustrates details of a WLAN for wireless communications.
  • FIG. 2 illustrates an example of a wireless communications system with OBSS.
  • FIG. 3 illustrates exemplary PPS scenarios within a BSS.
  • FIG. 4 illustrates exemplary PPS scenarios when OBSS is present.
  • FIG. 5 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure regarding adaptive threshold selection.
  • FIG. 6 illustrates exemplary selection of an initial nap threshold.
  • FIG. 7 illustrates a block diagram of a mobile device in accordance with one aspect of the present disclosure.
  • a transmitting wireless device such as a station (STA) or an access point (AP) that is part of a basic service set (BSS) may perform a clear channel assessment (CCA) procedure to determine the availability of the radio frequency spectrum used for communication.
  • CCA clear channel assessment
  • Multiple BSSs can be in relative close proximity, and transmissions from an overlapping BSS (OBSS) may impact the ability of a device to obtain access to, or "win," the channel. For example, if an STA detects a packet (e.g., a preamble) from another device, the STA may abstain from transmitting for the duration of the detected packet if the receive power of the packet is above a threshold.
  • a packet e.g., a preamble
  • the STA may still transmit if the received power of the packet is less than a threshold.
  • an STA may increase the threshold if the STA's transmission (TX) power is correspondingly decreased by some amount.
  • FIG. 1 illustrating details of a WLAN 100 for wireless communications.
  • WLAN 100 may be a Wi-Fi network.
  • WLAN 100 may include an AP 105 and multiple associated STAs 115, which may represent devices such as mobile stations, personal digital assistants (PDAs), other handheld devices, netbooks, notebook computers, tablet computers, laptops, display devices (e.g., TVs, computer monitors, etc.), printers, etc.
  • AP 105 and the associated STAs 115 may represent a BSS or an extended service set (ESS).
  • the various STAs 115 in the network are able to communicate with one another through AP 105.
  • a coverage area 110 of the AP 105 which may represent a basic service area (BSA) of 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 in an ESS.
  • BSA basic service area
  • STA 115 may be located in the intersection of more than one coverage area 110 and may associate 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 APs 105 in an ESS.
  • coverage area 110 of AP 105 may be divided into sectors (also not shown).
  • WLAN 100 may include APs 105 of different types (e.g., metropolitan area, home network, etc.), with varying and overlapping coverage areas 110.
  • Two STAs 115 may also communicate directly via a direct wireless link 125 regardless of whether both STAs 115 are in the same coverage area 110.
  • Examples of direct wireless links 125 may include Wi-Fi Direct connections, Wi-Fi Tunneled Direct Link Setup (TDLS) links, and other group connections.
  • STAs 115 and APs 105 may communicate via a wireless link 120 according to the WLAN radio and baseband protocol for physical (PHY) and medium access control (MAC) layers from IEEE 802.11 and versions including, but not limited to, 802.11b, 802.11g, 802.11a, 802.11 ⁇ , 802.11ac, 802.11ad, 802.11ah, 802.11ax, etc.
  • peer-to-peer connections or ad hoc networks may be implemented within WLAN 100.
  • WLAN 100 may be controlled by wide wireless access network (WW AN), such as a LTE network.
  • WW AN wide wireless access network
  • STA 115 or AP 105 may operate in a shared or unlicensed frequency spectrum. These devices may perform a CCA prior to communicating in order to determine whether the channel is available.
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions. For example, the device may infer that a change in a received signal strength indication (RSSI) of a power meter indicates that a channel is occupied. Specifically, signal power is that is concentrated in a certain bandwidth and exceeds a predetermined noise floor may indicate another wireless transmitter.
  • RSSI received signal strength indication
  • a CCA may also include detection of specific sequences that indicate use of the channel. For example, another device may transmit a specific preamble prior to transmitting a data sequence.
  • FIG. 2 illustrates an example of a wireless communications system 200 with OBSS.
  • Wireless communications system 200 may include AP 105-a and STA 115-a associated with a first BSS with a coverage area 110-a.
  • Wireless communications system 200 may also include AP 105-b and STA 115-b, which may be associated with an OBSS having a coverage area 110-b that overlaps coverage area 110-a.
  • AP 105-a, AP 105-b, STA 115-a, and STA 115-b may all communicate with one another and may be examples of the corresponding devices described with reference to FIG. 1.
  • the examples described below with reference to STA 115 may be performed by any number of wireless devices.
  • a transmitting wireless device may perform a CCA procedure to determine the availability of the radio frequency spectrum used for communication.
  • multiple BSSs can be in relative close proximity, and interference from STA 115-b may affect the transmission of STA 115-a.
  • STA 115-a may detect a preamble from STA 115-b and determine whether to transmit.
  • the preamble may include spatial reuse (SR) information.
  • SR information may be obtained by decoding the detected preamble.
  • SR information may include a predetermined CCA level, or a predetermined interference level.
  • STA 115-a may refrain from transmitting if a received RSSI is above the predetermined level, and/or if an estimated interference to STA 115-b is above the predetermined interference level.
  • the interference to STA 115-b may be estimated based on path loss measured by STA 115-a. However, STA 115-a may proceed with transmitting if a received RSSI is below the predetermined CCA level, and/or if an estimated interference to STA 115-b is below the predetermined interference level.
  • PPS packet power save
  • PPS allows circuits of an STA for media access control (MAC), physical (PHY) or radio frequency (RF) control to enter into a low power state.
  • MAC media access control
  • PHY physical
  • RF radio frequency
  • a low power state can also be referred to as a nap state or a sleep state.
  • an STA may stop receiving packets from an AP.
  • the STA may activate PPS during packet reception upon detecting a nap opportunity.
  • the STA may detect the nap opportunity by accessing the preamble or Wi-Fi header of detected packets. For example, the STA may enter into a nap state and drop a detected packet upon determining that such a detected packet is not from an associated AP.
  • the STA may enter into a nap state and drop a detected packet upon determining that such a detected pack is actually designated to another STA.
  • Various parameters in the preamble or Wi-Fi header may be used to determine the characteristics of a packet, including a packet address, a group identification, a BSS color, etc.
  • Current IEEE 802.11 series may define some PPS scenarios within a BSS as illustrated in FIG. 3.
  • an AP 300, an STA-1 305, an STA-2 310, and an STA-3 315 belong to the same BSS and in the same collision domain.
  • the procedure of carrier sense multiple access with collision avoidance (CSMA-CA) can ensure that AP 300 does not transmit any packet or data to any STA in a nap state.
  • CSMA-CA carrier sense multiple access with collision avoidance
  • AP 300 may not transmit packets to STA-1 305, but transmit packets to STA- 2 310 and STA-3 315.
  • STA-3 315 may not transmit packets to STA-1 305. Therefore, packet loss or throughput drop can be prevented.
  • an AP-A 400 and an STA-A1 405 belong to a first BSS
  • an AP-B 410 and an STA-B1 415 belong to a second BSS
  • an AP-C 420 and an STA-C1 425 belong a third BSS.
  • the second BSS and third BSS are adjacent to the first BSS. Therefore, STA-A1 405 may receive OBSS transmissions from STAs or APs in the second or third BSS.
  • an STA may lose packets from its associated AP because it has entered into a nap state upon detecting OBSS transmissions.
  • entering into a nap state upon detecting OBSS transmissions may not cause packet loss.
  • STA-Al 405 is in a nap state during a time duration 430 due to detection of OBSS transmissions from AP-B 410, which is not associated with STA- Al 405. But during time duration 430, AP-A 400 does not transmit any packet to STA-Al 405. Therefore, STA-Al 405 may not miss any packets from its associated AP-A 400.
  • STA-Al 405 may enter into a nap state at Ti 435 upon detecting OBSS transmissions from AP-C 420. Such nap state may last for an entire time duration 445. However, during such time duration 445, AP-A 400 may start transmitting packets to STA-Al at T 2 440 regardless of the status of STA-Al 405. Because STA-Al 405 has entered into a nap state, STA-Al 405 may miss packets transmitted from AP-A 400 after T 2 440.
  • FIG. 5 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure regarding adaptive threshold selection.
  • the example blocks may be implemented by a mobile device, such as STAs 115 in FIGs. 1 and 2 and STA-Al 405 in FIG. 4.
  • the mobile device may include a processor, which operates to execute logic, computer instructions, software stored in a memory, an antenna to transmit/receive signals, and a transceiver to process signals.
  • OBSS PPS transmissions from at least one OBSS AP may be monitored.
  • a dynamic OBSS PPS may be activated in response to the transmissions from the at least one OBSS AP exceeding a predefined threshold. If signal strength of OBSS transmissions is below a predefined threshold, there may be no need to activate an OBSS PPS as OBSS transmissions are weak. Therefore, OBSS nap opportunities may be limited.
  • OBSS PPS may be enabled by default without assessing the OBSS traffic first.
  • the signal strength of OBSS transmissions may be determined based on measurement results of hardware channel counters of a mobile device. Different counters may measure different kinds of signals. For example, a counter may be used to measure signals with signal strength higher than a CCA threshold ("T rx _ c i ear ”)- Signals with signal strength lower than a CCA threshold may be too weak to be received and decoded as WLAN packets by the mobile device, or to be co-related to orthogonal frequency-division multiplexing (OFDM) or complementary code keying (CCK) symbols.
  • OFDM orthogonal frequency-division multiplexing
  • CCK complementary code keying
  • a MAC counter may be used to measure signals sent from and directed to the mobile device ("T mytx " and "T myrx "). Also, a MAC counter may be used to measure signals from an AP associated with the mobile device in addition to T mytx and T myrx ("Tbss_txrx”X and/or count the duration of the nap state. Accordingly, the OBSS signals (“To bss _ txrx ”) may be equal to T rx _ c i ea r -T mytx -T myrx -T bss txrx .
  • the conditions to declare significant OBSS transmissions and activate OBSS PPS may include both Trx ciear and Tobss_txrx being at or above certain thresholds.
  • the mobile device may collect and record transmission activities from OBSS or BSS and associated parameters indicating signal strength or quality.
  • the dynamic OBSS PPS may be activated with an initial nap threshold.
  • the initial nap threshold may be an initial OBSS RSSI threshold, or another threshold relating to OBSS signal strength or quality.
  • a mobile device may enter into a nap state and de-activate reception of both transmissions from at least one OBSS AP and transmissions from a BSS AP (an AP associated with the mobile device in the same BSS).
  • the initial nap threshold may be conservatively determined and then adaptively adjusted. If the initial nap threshold is set too high, OBSS PPS rarely occurs. If the initial nap threshold is set too low, OBSS PPS may be easily activated but cause loss of packets from a BSS AP.
  • FIG. 6 illustrates exemplary selection of an initial nap threshold.
  • BSS transmissions 610 and OBSS transmissions 615 and 620 are identified. Without considering any OBSS transmissions, RSSI of BSS transmissions 610 is above a BSS threshold 600, and, therefore, BSS transmissions 610 are strong enough to be successfully received by a mobile device.
  • RSSI of BSS transmissions 610 may be required to be above BSS threshold 600 plus a margin 630 for reception.
  • Margin 630 may reflect additional power required by a mobile device to decode packets in BSS transmissions 610 and may be in proportion to the reception rates of BSS transmissions 610. Alternatively or additionally, margin 630 may reflect additional power required by a mobile device to correctly receive BSS transmissions 610 with other factors present. [0034] However, when OBSS transmissions and OBSS PPS are both involved, a mobile device may stop receiving both BSS and OBSS transmissions upon activation of OBSS PPS. In FIG.
  • RSSI of OBSS transmissions 615 is above an RSSI level 605, which may equal to RSSI of BSS transmissions 610 minus a restart threshold 625 and margin 630.
  • margin 630 may be neglected.
  • Restart threshold 625 may refer to an amount of signal strength on top of signal strength of OBSS transmissions that BSS transmissions require to be received and picked up by a mobile device. In other words, if the difference between RSSI of BSS transmissions and RSSI of OBSS transmissions is less than restart threshold 625, BSS transmissions may be jammed as the interference from OBSS transmissions is too strong.
  • OBSS PPS may be activated because RSSI of OBSS transmissions 615 is above an RSSI level 605. Therefore, BSS transmissions 610 may be jammed so that a mobile device may not lose any packet in BSS transmissions 610 from a BSS AP.
  • an initial nap threshold may be set as RSSI of BSS transmissions minus a restart threshold, or RSSI of BSS transmissions minus a restart threshold and a margin in order to avoid packet loss.
  • a set of throughput parameters may be monitored in response to the activating.
  • the monitored set of throughput parameters may be associated with throughput of a BSS AP.
  • the initial nap threshold may be adjusted in response to changes in one or more throughput parameters of the set of throughput parameters.
  • calibration of the initial nap threshold may be initiated. The goal of calibration is to decrease the initial nap threshold in order to increase the nap time without causing packet loss or throughput drop. The longer the nap time, the more power can be saved.
  • the set of throughput parameters may include one or more of: RSSI; reception rates; a block acknowledgement request (BAR); a PhyRestart counter; Rx frames with a retry bit set; or overall nap time.
  • the changes in the one or more throughput parameters may be determined by comparing the one or more throughput parameters monitored after adjusting the initial nap threshold to the one or more throughput parameters monitored before adjusting the initial nap threshold.
  • a mobile device may decrease the initial nap threshold. Stableness of the throughput parameters may reflect no change in the reception status of BSS transmissions from a BSS AP. BSS transmissions may remain jammed and cannot be received by a mobile device. Therefore, the mobile device can remain in a nap state.
  • the predefined threshold may be a tolerance of changes in a single throughput parameter, or a tolerance of total changes in multiple throughput parameters.
  • the initial nap threshold may be gradually decreased by repeating the calibration process. In some cases, the initial nap threshold may be decreased to an amount of zero (0).
  • the initial nap threshold is equal to zero (0), the dynamic OBSS PPS is activated upon detecting the transmissions from an OBSS AP.
  • the initial nap threshold can be set as zero (0) because the CSMA-CA can ensure that the BSS AP does not transmit any packet or data to any STA in a nap state.
  • a mobile device may stop decreasing the initial nap threshold, increase the initial nap threshold, and/or de-activate the dynamic OBSS PPS in order to avoid packet loss.
  • the mobile device may stop decreasing the initial nap threshold and maintain the current nap threshold when changes in the one or more throughput parameter is equal or close to the other predefined threshold.
  • the changes in one or more throughput parameters may include one or more of: increase on RSSI; reception rate drop; increase on PhyRestart counter; presence of many Rx frames with retry bit set; or reception of abnormal BAR.
  • Significant changes in throughput parameters(s) may reflect the change in the reception status of BSS transmissions.
  • BSS transmissions may start being picked up by the mobile device.
  • increase on PhyRestart counter may be due to increase on RSSI of BSS transmissions.
  • High RSSI of BSS transmissions may trigger the PhyRestart counter and gain reset.
  • FIG. 7 illustrates a block diagram of a mobile device 700 in accordance with one aspect of the present disclosure.
  • Mobile device 700 may be an STA, such as STAs 115 in FIGs. 1 and 2 and STA-A1 405 in FIG. 4.
  • Mobile device 700 may include various components including an antenna 705, a transceiver 710, a memory 720, a software 715, a processor 725, an OBSS transmission monitoring module 730, a PPS activating module 735, a throughput monitoring module 740, and a nap threshold adjusting module 745.
  • Transceiver 710 may communicate bi-directionally, via one or more antennas, wired, or wireless links, with one or more networks, as described above.
  • transceiver 710 may communicate bi-directionally with an AP or an STA, such as a cell phone 750.
  • Transceiver 710 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • mobile device 700 may include a single antenna 705. However, in some cases mobile device 700 may have two or more antennas, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • Processor 725 may include an intelligent hardware device, (e.g., a CPU, a microcontroller, an ASIC, etc.)
  • Memory 720 may include RAM and ROM.
  • Memory 720 may store computer-readable, computer-executable software including instructions that, when executed, cause the processor to perform various functions described herein.
  • memory 720 may store data and program codes for execution of OBSS transmission monitoring module 730, PPS activating module 735, throughput monitoring module 740, and nap threshold adjusting module 745.
  • OBSS transmission monitoring module 730 may be executed to monitor transmissions from at least one OBSS AP.
  • OBSS transmission monitoring module 730 may include one or more channel counters to measure the BSS transmissions, OBSS transmissions, and/or other transmissions.
  • PPS activating module 735 may be executed to activate a dynamic OBSS PPS with an initial nap threshold in response to the transmissions from the at least one OBSS AP exceeding a predefined threshold.
  • PPS activating module 735 may be further executed to determine the initial nap threshold.
  • PPS activating module 735 may be also executed to de-activate OBSS PPS.
  • a separate module (not shown in FIG. 7) may be included to be executed to de-activate OBSS PPS.
  • Throughput monitoring module 740 may be executed to monitor a set of throughput parameters associated with throughput of a BSS AP in response to the activating. Throughput monitoring module 740 may be further executed to determine the changes in one or more throughput parameters of the set of throughput parameters. Nap threshold adjusting module 745 may be executed to adjust the initial nap threshold in response to changes in the one or more throughput parameters of the set of throughput parameters. Nap threshold adjusting module 745 may be further executed to increase, decrease, or maintain the initial nap threshold.
  • the functional blocks and modules in FIGs. 5 and 7 may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer-readable storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general- purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • a connection may be properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL), then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term "and/or,” when used in a list of two or more items, means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed.
  • the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

Une sélection adaptative de seuil dans une économie d'énergie de paquets (PPS, "packet power save") d'ensemble de services de base superposés (OBSS, "overlapping basic service set") est examinée, dans laquelle un dispositif mobile peut surveiller des transmissions à partir d'au moins un point d'accès OBSS et activer un PPS OBSS dynamique avec un seuil initial de repos en réponse aux transmissions à partir du ou des points d'accès OBSS dépassant un seuil prédéfini. Le dispositif mobile peut étalonner le seuil initial de repos. Un tel étalonnage peut comprendre la surveillance d'un ensemble de paramètres de débit associés au débit d'un point d'accès d'ensemble de services de base (BSS, "basic service set") en réponse à l'activation et au réglage du seuil initial de repos en réponse à des changements dans un ou plusieurs paramètres de débit de l'ensemble de paramètres de débit.
PCT/US2017/051325 2016-09-22 2017-09-13 Procédé et appareil de sélection adaptative de seuil dans des économies d'énergie par paquets obss Ceased WO2018057363A1 (fr)

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AU2017330524A AU2017330524A1 (en) 2016-09-22 2017-09-13 Method and apparatus for adaptive threshold selection in OBSS packet power save

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US15/273,005 2016-09-22

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CN112422209A (zh) * 2020-11-24 2021-02-26 深圳创维数字技术有限公司 空间复用测试方法、装置、设备及计算机可读存储介质
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11432247B2 (en) 2019-04-22 2022-08-30 Cypress Semiconductor Corporation Methods, systems and devices for varying wireless transmit power based on path loss information
CN112422209A (zh) * 2020-11-24 2021-02-26 深圳创维数字技术有限公司 空间复用测试方法、装置、设备及计算机可读存储介质
CN112422209B (zh) * 2020-11-24 2022-08-02 深圳创维数字技术有限公司 空间复用测试方法、装置、设备及计算机可读存储介质

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