WO2019001732A1 - Techniques destinées au traitement de paquets de réveil consistant en des informations spécifiques à une station - Google Patents

Techniques destinées au traitement de paquets de réveil consistant en des informations spécifiques à une station Download PDF

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Publication number
WO2019001732A1
WO2019001732A1 PCT/EP2017/066306 EP2017066306W WO2019001732A1 WO 2019001732 A1 WO2019001732 A1 WO 2019001732A1 EP 2017066306 W EP2017066306 W EP 2017066306W WO 2019001732 A1 WO2019001732 A1 WO 2019001732A1
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WO
WIPO (PCT)
Prior art keywords
sta
wup
recipient
specific data
data entries
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PCT/EP2017/066306
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English (en)
Inventor
Genadiy Tsodik
Shimon SHILO
Doron Ezri
Avi WEITZMAN
Oded Redlich
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/EP2017/066306 priority Critical patent/WO2019001732A1/fr
Publication of WO2019001732A1 publication Critical patent/WO2019001732A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving 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 master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • 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 present disclosure relates to techniques for processing wake-up packets (WUPs) comprising station (STA)-specific information, in particular for wireless communication such as WiFi between an access point (AP) and multiple stations and vice versa.
  • WUPs wake-up packets
  • STA station
  • AP access point
  • WUP data cascading in WUP.
  • Wake-Up mechanism is currently widely discussed in IEEE 802.1 1 standard meetings. The main idea is to allow a station (STA) to work in very low power consumption mode.
  • An Access point (AP) that needs to communicate with a STA should transmit a special wake-up packet (WUP) to awake a STA, e.g. according to the WUP frame structure 100 and timing as shown in Fig. 1 including a preamble 101 , a MAC header 102 and data 103.
  • WUP 100 will be transmitted with a relatively low data rate, thus the transmission time 1 12 of the WUP 100 is long, for example longer than 500 s.
  • the overhead 1 1 1 of the constant part, i.e. preamble 101 and MAC header 102 of the WUP 100 is also very high, e.g. about 200 ⁇ .
  • STAs that are supposed to support WUP 100, thus reducing the overhead is crucial.
  • a main idea of the invention is to allow data cascading where each data entry addresses a different STA or a group of STAs, while all the data entries of the same type are declared in the common part of the WUP.
  • the main principles of the disclosure are as follows: WUP common part will not specify a recipient; the recipient ID will be indicated within each data entry; the recipient can be a single STA (unicast) or group of STA (multicast); and the order and a number of data entries will be set in way that minimize the required resource per STA to process the WUP as described in detail below.
  • the techniques presented hereinafter allow efficient transmission of WUPs to multiple STAs.
  • Implementing the presented idea allows an efficient transmission of the multiple wake-up data to the different STAs or groups of STAs.
  • the overhead of WUP transmission can be significantly reduced.
  • Applying a single WUP transmission instead of multiple WUPs reduces the overhead of the common part of the WUP.
  • the concept presented in this disclosure allows flexible WUP format structure and efficient detection with maximum power saving.
  • WID WUP ID, Wake-Up Packet Identifier
  • the invention relates to a transmitter device for an access point (AP) or a station (STA), the transmitter device comprising: a processor, configured to generate a wake-up packet (WUP) for transmission to at least two recipient stations, wherein the WUP comprises: a first STA-specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations; and a transmitter, configured to transmit the at least one WUP.
  • WUP wake-up packet
  • Such a transmitter device allows efficient transmission of WUPs to different STAs or groups of STAs. By utilizing STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the transmitter device allows flexible WUP format structure and efficient detection with maximum power saving.
  • the broadcast information can be directed to all or to a subset of the recipient devices addressed by the WUP.
  • the WUP comprises: a common part destined for all recipient stations; and one or more STA-specific data entries each destined for a specific recipient station. By utilizing STA-specific information the overhead of the common part of the WUP can be reduced.
  • the common part can also comprise STA-information.
  • the common part comprises a data field specifying a number of STA-specific data entries comprised in the WUP.
  • the number of STA-specific data entries is less than a predefined maximum number. This provides the advantage that the receiver knows the predefined maximum number and hence how many entries the receiver has to check at most. This reduces processing complexity of the receiver.
  • the transmitter is configured to transmit the predefined maximum number of STA-specific entries in a message, in particular a broadcast message, prior to transmitting the at least one WUP and/or in a WUP.
  • This provides the advantage that the receiver knows the predefined maximum number from prior message transfer or from a prior WUP or from the same WUP in a message field that is decoded prior to checking the number of data entries.
  • each STA-specific data entry comprises a data field indicating an identifier (WID) of the respective recipient station.
  • WID identifier
  • This provides the advantage that the receiver can go through the WIDs of the STA-specific entries without having to read the corresponding data fields until the WID corresponding to the receiver's WID is detected. This procedure improves the detection process at the receiver.
  • each recipient station comprises a single STA or a group of STAs.
  • a single STA is indicated by a unicast WID
  • a group of STAs is indicated by a multicast WID.
  • the set of unicast WIDs and the set of multicast WIDs should be known prior to both sides.
  • the processor is configured to arrange the STA-specific data entries ordered by their identifiers (WIDs) in the WUP.
  • WIDs identifiers
  • This provides the advantage that the receiver can quickly look-up the WUP by utilizing the WIDs of the data entries and hence quickly access the respective data entry destined for the receiver.
  • Such a WUP structure accelerates processing speed of the receiver and reduces wake-up times.
  • the processor is configured to arrange the STA-specific data entries in an ascending or descending order.
  • each STA-specific data entry comprises a wake-up trigger and a set of wake-up parameters, in particular information indicating a wake-up time, for the respective recipient station.
  • each STA-specific data entry comprises a channel switching information, in particular an information about a new channel index, for the respective recipient station.
  • the invention relates to a receiver device for a first recipient station (STA), the receiver device comprising: a receiver, configured to receive a wake-up packet (WUP), in particular a WUP transmitted by a transmitter device according to one of claims 1 to 1 1 , wherein the WUP comprises: a first STA-specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations; and a processor, configured to detect from information comprised in the WUP if the WUP comprises a STA-specific data entry destined for the first recipient STA and to process a detected STA-specific data entry destined for the first recipient STA.
  • WUP wake-up packet
  • Such a receiver device allows efficient reception of WUPs to different STAs or groups of STAs. By utilizing STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the receiver device of the first STA can efficiently detect the WUP destined for the first STA with maximum power saving.
  • the WUP comprises: a common part destined for all recipient stations; and one or more STA-specific data entries each destined for a specific recipient station.
  • the common part can also comprise STA-information.
  • the processor is configured to determine a data field of the common part of the WUP specifying a total number of STA-specific data entries comprised in the WUP.
  • the design of the receiver device can be less complex when the total number of data entries of the WUP is known to the receiver. The receiver can check the WUP until the total number of data entries is reached. This accelerates receiver processing.
  • the processor is configured to check if the STA-specific data entries comprise an identifier (WID) of the WUP corresponding to a known identifier of the first recipient STA.
  • WID identifier
  • the processor is configured to perform the checking in a predefined order with respect to the STA-specific data entries.
  • This provides the advantage that the receiver device of the first STA can quickly look-up the WUP by utilizing the WIDs of the data entries and hence quickly access the respective data entry destined for the first STA.
  • Such a WUP structure accelerates processing speed of the receiver device and reduces wake-up times.
  • the processor is configured to perform the checking in an ascending or descending order depending on the WID.
  • the processor is configured to perform the checking of the STA-specific data entries up to a maximum number of entries corresponding to the specified total number of STA-specific data entries or to a predefined maximum number.
  • the invention relates to a method for transmitting a wake-up packet (WUP) to at least two recipient stations, the method comprising: generating a wake- up packet (WUP) for transmission to at least two recipient stations, wherein the WUP comprises: a first STA-specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations; and transmitting the at least one WUP.
  • WUP wake-up packet
  • WUP wake-up packet
  • Such a method allows efficient transmission of WUPs to different STAs or groups of STAs.
  • STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the transmission method allows flexible WUP format structure and efficient detection with maximum power saving.
  • the invention relates to a method for receiving a wake-up packet (WUP) by a first recipient STA, the method comprising: receiving a wake-up packet (WUP), wherein the WUP comprises: a first STA-specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations; and detecting from information comprised in the WUP if the WUP comprises a STA-specific data entry destined for the first recipient STA and processing a detected STA-specific data entry destined for the first recipient STA.
  • WUP wake-up packet
  • Such a method allows efficient reception of WUPs to different STAs or groups of STAs.
  • STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the reception method provides efficient power saving.
  • Fig. 1 shows a schematic diagram illustrating a WUP frame structure 100 and timing
  • Fig. 2 shows a schematic diagram illustrating a WUP 200 according to IEEE 802.1 1
  • Fig. 3 shows a schematic diagram illustrating a WUP 300 including cascaded data entries for multiple recipients according to the disclosure
  • Fig. 4 shows a schematic diagram illustrating a WUP 400 including organized data entries by their ID's order according to the disclosure
  • Fig. 5 shows a schematic diagram illustrating a WUP 500 implementing a cascading application for waking-up multiple STAs according to the disclosure
  • Fig. 6 shows a schematic diagram illustrating a WUP 600 implementing a cascading application for channel switching according to the disclosure
  • Fig. 7 shows a block diagram of a transmitter device 700 according to the disclosure
  • Fig. 8 shows a block diagram of a receiver device 800 according to the disclosure
  • Fig. 9 shows a schematic diagram of a method 900 for transmitting a wake-up packet according to the disclosure.
  • Fig. 10 shows a schematic diagram of a method 1000 for receiving a wake-up packet according to the disclosure.
  • the methods and devices described herein may be implemented in wireless communication networks, in particular communication networks based on WiFi communication standards according to IEEE 802.1 1.
  • the methods and devices described herein may also be implemented in wireless communication networks based on mobile communication
  • the described devices may include integrated circuits and/or passives and may be manufactured according to various technologies.
  • the circuits may be designed as logic integrated circuits, analog integrated circuits, mixed signal integrated circuits, optical circuits, memory circuits and/or integrated passives.
  • Radio signals may be or may include radio frequency signals radiated by a radio transmitting device (or radio transmitter or sender) with a radio frequency lying in a range of about 3 kHz to 300 GHz.
  • the frequency range may correspond to frequencies of alternating current electrical signals used to produce and detect radio waves.
  • processors may include processors.
  • processor describes any device that can be utilized for processing specific tasks (or blocks or steps).
  • a processor can be a single processor or a multi-core processor or can include a set of processors or can include means for processing.
  • a processor can process software or firmware or applications etc.
  • the devices and systems described herein may be based on transmission and reception of wake-up packets.
  • a Wake Up Packet (WUP).
  • an AP may use a WUP to wake up one or more STAs for the following purposes: Synchronization, Request STAs to listen to beacon, Data transmission, e.g. DL/UL and/or SU/MU.
  • a STA may use a WUP to wake up an AP for the following purposes: Discovery and association, UL Data Transmission.
  • STA behaviors and WUP contents may be different in many of the scenarios described above depending on the purpose of the transmitted WUP.
  • Fig. 2 shows a schematic diagram illustrating a WUP 200 according to IEEE 802.1 1 .
  • the WUP includes a preamble 101 , a message description data field 201 , a wake-up identifier (WID) 202 and multiple information elements IE #1 , 201 to IE #N, 212.
  • the preamble 101 , the message description data field 201 and the wake-up identifier (WID) 202 are overhead 203 of the WUP 200 while the multiple information elements IE #1 , 201 to IE #N, 212 are payload of the WUP 200.
  • the WUP 200 depicted in Fig. 2 is mainly designed for multiple data transmissions
  • Fig. 3 shows a schematic diagram illustrating a WUP 300 including cascaded data entries for multiple recipients according to the disclosure.
  • the WUP 300 includes a preamble 101 , a message description data field 301 and a data field 302 indicating the number of data entries in the WUP 300 followed by a plurality of Wake-Up Identifiers (WIDs) 31 1 , 313 with corresponding STA-specific data entries 312, 314.
  • the preamble 101 , the message description data field 301 and the data field 302 indicating the number of data entries are overhead 303 of the WUP 300 while the multiple WIDs 31 1 , 312 with corresponding STA- specific data entries 312, 314 are payload of the WUP 300.
  • Cascading the multiple recipient STAs 31 1 , 313 within the same WUP transmission 300 including special ordering and constraints as described below make the disclosed frame format efficient for both AP and STA.
  • the main point is cascading the multiple WUP data entries 312, 314 in the same frame 300 as shown in Fig. 3.
  • the common part, i.e. the data field 302 may include an indication of the number of cascaded elements.
  • Each data entry 312, 314 includes the indication of the recipient (indicated by the corresponding WID field 31 1 , 313).
  • the idea is to allow data cascading where each data entry 312, 314 addresses different STA or group of STAs, while all the data entries of the same type are declared in the common part 302 of the WUP 300.
  • WUP common part 301 , 302 does not specify a recipient.
  • the recipient ID, 31 1 , 313 is indicated within each data entry 312, 314 (or in the data field 31 1 , 313 preceding or succeeding the corresponding data entry 312, 314 as illustrated in Fig. 3).
  • the recipient can be a single STA (e.g. unicast) or a group of STAs (e.g. multicast).
  • the order and a number of data entries 312, 314 is set in a way that minimizes the required resource per STA to process the WUP 300 as described below.
  • Fig. 4 shows a schematic diagram illustrating a WUP 400 including organized data entries by their ID's order according to the disclosure.
  • the WUP 400 includes a preamble 101 , a message description data field 301 and a data field 302 indicating the number of data entries in the WUP 400 followed by a plurality of Wake-Up Identifiers (WIDs) 31 1 , 313 with corresponding STA-specific data entries 312, 314.
  • WIDs Wake-Up Identifiers
  • the WIDs range from a minimum number WID Min, 401 to a maximum number WID Max, 402.
  • the WUP 400 is a possible implementation for a number of data entries 312, 314 and their ordering.
  • the main purpose is to reduce a time required to a single STA to detect the WUP and to determine whether it is a recipient of the current transmission.
  • the ordering of the WUP 400 is according to the following principles: Specify a number of data entries transmitted in current WUP 400, the common part 301 , 302 includes an optional field 302 that can specify a number of data entries.
  • STA can set a number of IDs to check. Agree on a maximum number of data entries transmitted in current WUP 400, the AP can advertise in a broadcast message what will be a maximum number of data entries in the upcoming WUPs.
  • the STA can set a number of IDs to check to the introduced number.
  • Set the data entries by the order of the IDs AP can organize the IDs of the recipient of the data entries in ascending or descending order. In this case STA can stop detecting WUP if ID higher or lower than his own
  • Fig. 5 shows a schematic diagram illustrating a WUP 500 implementing a cascading application for waking-up multiple STAs according to the disclosure.
  • the WUP 500 includes a preamble 101 , a message description data field 301 and a data field 302 indicating the number of data entries of the WUP 500.
  • These data fields 101 , 301 , 302 specify the overhead 303 which is followed by a plurality of Wake-Up Identifiers (WIDs) 31 1 , 313 with corresponding STA-specific data entries, e.g. STA-specific data entries 312, 314 as described above with respect to Fig. 4, including respective wake-up triggers 501 , 502.
  • the WIDs range from a minimum number WID Min, 401 to a maximum number WID Max, 402.
  • Fig. 5 illustrates a first possible example of cascading application: Wake Up multiple STAs that are not grouped together.
  • the AP transmits multiple data entries, where each data entry carries a wake-up trigger 501 , 502 for a different STA or a group of STAs with possibly different wake-up parameters (for example the exact wake-up time).
  • Fig. 6 shows a schematic diagram illustrating a WUP 600 implementing a cascading application for channel switching according to the disclosure.
  • the structure of the WUP 600 corresponds to the structure of the WUP 500 described above with respect to Fig. 5 but the data entries include the channel index 601 , 602 instead of the wake-up trigger 501 , 502 depicted in Fig. 5.
  • the channel index 601 , 602 indicates a channel to be used for
  • Fig. 6 illustrates a second possible example of cascading application, that is channel switching.
  • AP transmits multiple data entries, where each data entry carries channel switching information for different STA or group of STAs with a possibly different new channel index 601 , 602.
  • Fig. 7 shows a block diagram of a transmitter device 700 according to the disclosure.
  • the transmitter device 700 may be implemented in an access point (AP) or a station (STA).
  • the transmitter device 700 includes a processor 701 and a transmitter 702.
  • the processor 701 is configured to generate a wake-up packet (WUP) 704 for transmission to at least two recipient stations 71 1 , 712, 713.
  • the WUP 704 may correspond to one of the WUPs 300, 400, 500, 600 described above with respect to Figures 3 to 6.
  • the WUP 704 includes: a first STA- specific information 312, e.g.
  • the transmitter 702 is configured to transmit the at least one WUP 704.
  • the WUP 704 may include a common part, e.g. a common part 301 , 302 as described above with respect to Figures 3 to 6, destined for all recipient stations 71 1 , 712, 713; and one or more STA-specific data entries 312, 314, e.g. as described above with respect to Figures 3 to 6, each destined for a specific recipient station.
  • the common part 301 , 302 may include a data field 302 specifying a number of STA-specific data entries comprised in the WUP 300, e.g. as described above with respect to Figures 3 to 6.
  • the number of STA-specific data entries may be less than a predefined maximum number.
  • the transmitter 702 may be configured to transmit the predefined maximum number of STA-specific data entries in a message, in particular a broadcast message, prior to transmitting the at least one WUP 704 and/or in a WUP 704.
  • Each STA-specific data entry 312, 314 may include a data field 31 1 , 313 indicating an identifier (WID) of the respective recipient station 71 1 , 712, 713, e.g. as described above with respect to Figures 3 to 6.
  • Each recipient station 71 1 , 712, 713 may include a single STA or a group of STAs.
  • a single STA may be indicated by a unicast WID, and a group of STAs may be indicated by a multicast WID, for example.
  • the processor 701 may be configured to arrange the STA-specific data entries 312, 314 ordered by their identifiers (WIDs) 31 1 , 313 in the WUP 704.
  • the processor 701 may be configured to arrange the STA-specific data entries 312, 314 in an ascending or descending order, for example.
  • Each STA-specific data entry 312, 314 may include a wake-up trigger 501 , 502 and a set of wake-up parameters, in particular information indicating a wake-up time, for the respective recipient station 71 1 , 712, 713, e.g. as described above with respect to Figure 5.
  • Each STA- specific data entry 312, 314 may include a channel switching information, in particular an information about a new channel index 601 , 602, for the respective recipient station 71 1 , 712, 713, e.g. as described above with respect to Figure 6.
  • Fig. 8 shows a block diagram of a receiver device 800 according to the disclosure.
  • the receiver device 800 may be implemented in a first recipient station (STA), e.g. a first STA 71 1 as depicted in Fig. 7.
  • STA first recipient station
  • the receiver device 800 includes a receiver 802 and a processor 801 .
  • the receiver 802 is configured to receive a wake-up packet (WUP) 704, in particular a WUP transmitted by a transmitter device 700 as described above with respect to Fig. 7.
  • the WUP 704 may correspond to one of the WUPs 300, 400, 500, 600 described above with respect to Figures 3 to 6.
  • the WUP 704 includes: a first STA-specific information 312 for the first recipient station 71 1 ; and at least one of the group consisting of: a second STA-specific information 314 for the second recipient station 712, e.g. as described above with respect to Figures 3 to 6; or a broadcast information to the at least two recipient stations 71 1 , 712, 713.
  • the processor 801 is configured to detect from information comprised in the WUP 704 if the WUP comprises a STA-specific data entry 312 destined for the first recipient STA 71 1 and to process a detected STA-specific data entry 312 destined for the first recipient STA 71 1 .
  • the WUP 704 may include a common part 301 , 302, e.g. as described above with respect to Figures 3 to 6, destined for all recipient stations 71 1 , 712, 713; and one or more STA-specific data entries 312, 314, e.g. as described above with respect to Figures 3 to 6, each destined for a specific recipient station 71 1 , 712, 713.
  • the processor 801 may be configured to determine a data field 302 of the common part 301 , 302 of the WUP 704 specifying a total number of STA-specific data entries comprised in the WUP, e.g. as described above with respect to Figures 3 to 6.
  • the processor 801 may be configured to check if the STA-specific data entries comprise an identifier (WID) 31 1 , 313 of the WUP 704, 300 corresponding to a known identifier of the first recipient STA 71 1 , e.g. as described above with respect to Figures 3 to 6.
  • the processor 801 may be configured to perform the checking in a predefined order with respect to the STA- specific data entries 312, 314, e.g. as described above with respect to Figures 3 to 6.
  • the processor 801 may be configured to perform the checking in an ascending or descending order depending on the WID 31 1 , 313, e.g. as described above with respect to Figures 3 to 6.
  • the processor 801 may be configured to perform the checking of the STA-specific data entries 312, 314 up to a maximum number of entries corresponding to the specified total number of STA-specific data entries or to a predefined maximum number, e.g. as described above with respect to Figures 3 to 6.
  • Fig. 9 shows a schematic diagram of a method 900 for transmitting a wake-up packet according to the disclosure.
  • the method 900 includes generating 901 a wake-up packet (WUP), e.g. a WUP 300, 400, 500, 600, 704 as described above with respect to Figures 3 to 8, for transmission to at least two recipient stations 71 1 , 712, 713 as depicted in Fig. 7, wherein the WUP comprises: a first STA-specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations.
  • the method 900 further includes transmitting 902 the at least one WUP, e.g.
  • Such a method 900 allows efficient transmission of WUPs to different STAs or groups of STAs. By utilizing STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the transmission method 900 allows flexible WUP format structure and efficient detection with maximum power saving.
  • Fig. 10 shows a schematic diagram of a method 1000 for receiving a wake-up packet by a first STA, e.g. a first STA 71 1 as depicted in Fig. 7, according to the disclosure.
  • the method 1000 includes: receiving 1001 a wake-up packet (WUP), e.g. a WUP 704 as described above with respect to Figures 3 to 9, wherein the WUP comprises: a first STA- specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations, e.g. as described above with respect to Figure 8.
  • WUP wake-up packet
  • the WUP comprises: a first STA- specific information for the first recipient station; and at least one of the group consisting of: a second STA-specific information for the second recipient station; or a broadcast information to the at least two recipient stations, e.g. as described above with respect to Figure 8.
  • the method 1000 further includes detecting 1002 from information comprised in the WUP if the WUP comprises a STA-specific data entry destined for the first recipient STA and processing a detected STA-specific data entry destined for the first recipient STA, e.g. as described above with respect to Figure 8.
  • the WUP 704 may correspond to one of the WUPs 300, 400, 500, 600 described above with respect to Figures 3 to 6.
  • Such a method 1000 allows efficient reception of WUPs to different STAs or groups of STAs. By utilizing STA-specific information the overhead of WUP transmission can be significantly reduced because a single WUP transmission can be applied instead of multiple WUPs to provide the same information content to the STAs.
  • the reception method 1000 provides efficient power saving.
  • the present disclosure also supports a computer program product including computer executable code or computer executable instructions that, when executed, causes at least one computer to execute the performing and computing steps described herein, in particular the steps of the methods 900, 1000 described above.
  • a computer program product may include a readable non-transitory storage medium storing program code thereon for use by a computer.
  • the program code may perform the processing and computing steps described herein, in particular the method described above. While a particular feature or aspect of the disclosure may have been disclosed with respect to only one of several implementations, such feature or aspect may be combined with one or more other features or aspects of the other implementations as may be desired and advantageous for any given or particular application.

Abstract

L'invention concerne un dispositif émetteur (700) destiné à un point d'accès (AP) ou à une station (STA), le dispositif émetteur (700) consistant : en un processeur (701), configuré pour générer un paquet de réveil (WUP) (704, 300) destiné à une émission à au moins deux stations de destinataire (711,712, 713), le WUP (704, 300) consistant : en une première information spécifique à une STA (312) destinée à la première station de destinataire (711) ; et en au moins une parmi le groupe consistant : en une seconde information spécifique à une STA (314) destinée à la seconde station de destinataire (712) ; ou en des informations de diffusion à au moins deux stations de destinataire (711, 712) ; et en un émetteur (702), configuré pour émettre le ou les WUP (704).
PCT/EP2017/066306 2017-06-30 2017-06-30 Techniques destinées au traitement de paquets de réveil consistant en des informations spécifiques à une station WO2019001732A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140050133A1 (en) * 2012-08-17 2014-02-20 Qualcomm Incorporated Systems and methods for low power wake up signal and operations for wlan
US20140086124A1 (en) * 2012-09-26 2014-03-27 Imagination Technologies Limited Method and system for wirelessly transmitting data
US20170111858A1 (en) * 2015-10-19 2017-04-20 Shahrnaz Azizi Wake up packet design for low-power wake-up receiver in a wireless network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140050133A1 (en) * 2012-08-17 2014-02-20 Qualcomm Incorporated Systems and methods for low power wake up signal and operations for wlan
US20140086124A1 (en) * 2012-09-26 2014-03-27 Imagination Technologies Limited Method and system for wirelessly transmitting data
US20170111858A1 (en) * 2015-10-19 2017-04-20 Shahrnaz Azizi Wake up packet design for low-power wake-up receiver in a wireless network

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