WO2023153552A1 - Method of synchronizing transceiver devices for wi-fi sharing, intermediate transceiver device and system thereof - Google Patents

Method of synchronizing transceiver devices for wi-fi sharing, intermediate transceiver device and system thereof Download PDF

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Publication number
WO2023153552A1
WO2023153552A1 PCT/KR2022/003445 KR2022003445W WO2023153552A1 WO 2023153552 A1 WO2023153552 A1 WO 2023153552A1 KR 2022003445 W KR2022003445 W KR 2022003445W WO 2023153552 A1 WO2023153552 A1 WO 2023153552A1
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Prior art keywords
twt
transceiver device
transceiver
parameters
devices
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PCT/KR2022/003445
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French (fr)
Inventor
Saranappa Raj Kumar
Manbir Singh SONI
Kavin Kumar Thangadorai
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Samsung Electronics Co., Ltd.
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Publication of WO2023153552A1 publication Critical patent/WO2023153552A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the disclosure is generally related to Wi-Fi sharing, and more particularly to, for example, but not limited to, a method, an intermediate transceiver device and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • Wi-Fi sharing data connectivity from a Wi-Fi access point (herein referred as a first transceiver device) is shared to station devices (herein referred as second transceiver devices) through an intermediate transceiver device.
  • the station devices access Internet services provided by the Wi-Fi access point, without obtaining and manually entering a Wi-Fi password. Instead of connecting to the Wi-Fi access point through use of the Wi-Fi password, the station devices remain connected with the intermediate transceiver device, which is wirelessly connected with the Wi-Fi access point.
  • the intermediate transceiver device To perform the Wi-Fi sharing, the intermediate transceiver device enables two separate interfaces such as a Wi-Fi interface (alternatively referred as backhaul interface or Station (STA) interface) and a hotspot interface (alternatively referred as fronthaul interface or Access Point (AP) interface).
  • STA backhaul interface
  • AP Access Point
  • the station devices communicate with the intermediate transceiver device through the hotspot interface, and the intermediate transceiver device communicate with the Wi-Fi access point through the Wi-Fi interface.
  • TWT Target Wake Time
  • FIG. 1a shows a system 100 illustrating unsynchronized TWT exchanges during Wi-Fi sharing.
  • the intermediate transceiver device 107 receives a first TWT frame 113 from the first transceiver device 101 through the backhaul interface 109 and a second TWT frame 115 from the second transceiver device 105 through the fronthaul interface 111.
  • the first TWT frame 113 and the second TWT frame 115 may comprise TWT parameters such as a target wake time, a duration of a TWT service period (SP) and a TWT interval between TWT SPs with regards to the first transceiver device 101 and the second transceiver device 105, respectively.
  • TWT parameters such as a target wake time, a duration of a TWT service period (SP) and a TWT interval between TWT SPs with regards to the first transceiver device 101 and the second transceiver device 105, respectively.
  • SP duration of a TWT service period
  • the target wake time may indicate a future individual TWT SP start time, a next wake TBTT time, or a future broadcast TWT SP start time.
  • the duration of the TWT SP may indicate the amount of time occupied by the TWT SP.
  • a first TWT SP 117 and a first TWT interval 119 associated with the first transceiver device 101 are different from a second TWT SP 121 and a second TWT interval 123 associated with the second transceiver device 105, as illustrated in FIG. 1a . This introduces a first delay 125 and a second delay 127 between the TWT SPs of the first transceiver device 101 and the second transceiver device 105.
  • the first transceiver device 101 and the second transceiver device 105 fail to communicate quality-of-service (QoS) data frames and acknowledgment frames with each other in single TWT SP duration.
  • QoS quality-of-service
  • An increase in the number of second transceiver devices gives rise to occurrence of contention. Consequently, retransmission of QoS data frames and acknowledgment frames is required, which further increases latency.
  • the fronthaul interface 111 wakes up frequently, even during sleep duration of the first transceiver device 101.
  • the backhaul interface 109 of the intermediate transceiver device 107 wakes up unnecessarily, even when the second transceiver devices do not send any QoS frames or acknowledgement frames.
  • a battery of the intermediate transceiver device 107 runs out of power quickly due to such excess power consumption, resulting in poor experience of a user of the intermediate transceiver device 107 during the Wi-Fi sharing.
  • FIG. 1b shows an example illustrating latency introduced due to unsynchronized TWT exchanges during Wi-Fi sharing.
  • the TWT SP is of 20 milliseconds
  • a Target Beacon Transmission Time (TBTT) is of 100 milliseconds
  • a beacon interval is of 100 milliseconds.
  • two data frames and corresponding two acknowledgement frames can be exchanged.
  • each of the first transceiver device 101 and the second transceiver device 105 wakes for 20 milliseconds in each 100 milliseconds time interval.
  • the backhaul interface 109 and the fronthaul interface 111 of the intermediate transceiver device 107 need to wake for at least 20 milliseconds to communicate with the first transceiver device 101 and the second transceiver device 105, respectively.
  • wake-up times for the first transceiver device 101 and the second transceiver device 105 become different.
  • the first transceiver device 101 wakes up after 55 milliseconds from a beacon transmission time
  • the second transceiver device 105 wakes up after 20 milliseconds from the beacon transmission time.
  • the second transceiver device 105 connected to the the fronthaul interface 111 of the intermediate transceiver device 107 faces a latency of 35 milliseconds.
  • the backhaul interface 109 needs to wake up for sending a request for traffic to the first transceiver device 101 using Power Save (PS) poll mechanism.
  • PS Power Save
  • a radio wakeup time of the backhaul interface 109 may include a Distributed Inter-Frame Space (DIFS) time, a PS poll time, a Contention Window (CW) time, a Request To Send (RTS) time, a Short Inter-frame Spacing (SIFS) time, a Clear To Send (CTS) time, one or more data packets transmission times, one or more acknowledgements times, one or more collision time periods and a next TWT SP.
  • DIFS Distributed Inter-Frame Space
  • CW Contention Window
  • RTS Request To Send
  • SIFS Short Inter-frame Spacing
  • CTS Clear To Send
  • the radio wakeup time of the backhaul interface 109 becomes greater than the TWT SP due to higher probability of collisions caused by the unsynchronized TWT exchanges. Consequently, power consumption at the backhaul interface 109 increases.
  • the present disclosure discloses a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • the method comprises receiving, by an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices, a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network. Further, the method comprises determining, by the intermediate transceiver device, one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames.
  • TWT Target Wake-up Time
  • the method comprises synchronizing, by the intermediate transceiver device, the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters for Wi-Fi sharing with the one or more second transceiver devices.
  • the present disclosure discloses an intermediate transceiver device for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • the intermediate transceiver device comprises a processor; and a memory communicatively coupled to the processor.
  • the processor receives a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network.
  • the intermediate transceiver device is communicatively coupled between the first transceiver device and the one or more second transceiver devices.
  • the processor determines one or more aligned TWT parameters. Further, based on the one or more aligned TWT parameters, the processor synchronizes the first transceiver device and the one or more second transceiver devices for Wi-Fi sharing with the one or more second transceiver devices.
  • the present disclosure discloses a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • the system comprises the first transceiver device, the one or more second transceiver devices, and an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices.
  • the first transceiver device transmits a first Target Wake-up Time (TWT) frame.
  • the one or more second transceiver devices transmit one or more second TWT frames.
  • the intermediate transceiver device receives the first TWT frame from the first transceiver device and the one or more second TWT frames from the one or more second transceiver devices over a wireless network.
  • the intermediate transceiver device determines one or more aligned TWT parameters. Based on the one or more aligned TWT parameters, the intermediate transceiver device synchronizes the first transceiver device and the one or more second transceiver devices. The synchronization is performed for Wi-Fi sharing with the one or more second transceiver devices.
  • FIG. 1a shows a system illustrating unsynchronized TWT exchanges during WI-FI sharing.
  • FIG. 1b shows an example illustrating latency introduced due to unsynchronized TWT exchanges during Wi-Fi sharing.
  • FIG. 2a shows a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • FIG. 2b and FIG. 2c show exemplary scenarios illustrating synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • FIG. 3 shows a block diagram of an intermediate transceiver device in accordance with some embodiments of the present disclosure.
  • FIG. 4 shows a flow chart illustrating a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • FIG. 5 shows a block diagram of an exemplary computer system for implementing embodiments consistent with the present disclosure.
  • any flow diagrams and timing diagrams herein represent conceptual views of illustrative device embodying the principles of the present disclosure.
  • any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether such computer or processor is explicitly shown.
  • Embodiments of the present disclosure may relate to a method, an intermediate transceiver device, and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • the intermediate transceiver device may be communicatively coupled between the first transceiver device and the one or more second transceiver devices for performing Wi-Fi sharing.
  • the intermediate transceiver device may be wirelessly connected to the first transceiver device to avail data connectivity.
  • the first transceiver device may be a Wi-Fi access point for providing internet access to the intermediate transceiver device.
  • the one or more second transceiver devices may be connected to the intermediate transceiver device through a hotspot interface to avail the data connectivity from the first transceiver device.
  • the present disclosure synchronizes or aligns Target Wake-up Time (TWT) parameters and TWT SPs of the first transceiver device and the one or more second transceiver devices to improve sharing the data connectivity from the first transceiver device to the one or more second transceiver devices via the intermediate transceiver device.
  • TWT Target Wake-up Time
  • determination of one or more aligned TWT parameters is performed based on the TWT frames received from the first transceiver device and the one or more second transceiver devices during an individual TWT negotiation or a broadcast TWT negotiation process.
  • FIG. 2a shows a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • the system 200 may comprise a first transceiver device 101, one or more second transceiver devices 105 1 , 105 2 , 105 3 .................105 N (collectively referred as one or more second transceiver devices 105), and an intermediate transceiver device 107.
  • the intermediate transceiver device 107 may be communicatively coupled between the first transceiver device 101 and the one or more second transceiver devices 105.
  • the first transceiver device 101 may include, but not limited to, a Wi-Fi Access Point (AP) or Wi-Fi router installed in a home environment, and an office environment etc.
  • the first transceiver device 101 may be directly connected to an Internet 103 modem.
  • AP Wi-Fi Access Point
  • Wi-Fi router installed in a home environment, and an office environment etc.
  • the first transceiver device 101 may operate as a hub to broadcast an internet signal to one or more Wi-Fi enabled devices within a predefined network coverage area of the first transceiver device 101.
  • each of the one or more second transceiver devices 105 may include, be implemented as, or be included in, but not limited to, one of a smartphone, a laptop, a desktop, a smartwatch, a smart television, a smart speaker, a tablet, Personal Digital Assistance (PDA), and an Internet of Things (IoT) device.
  • the intermediate transceiver device 107 may include, be implemented as, or be included in, but not limited to, a smartphone, an extended router, a wireless repeater, a Wi-Fi range extender, a laptop, and a desktop.
  • the intermediate transceiver device 107 may have at least one backhaul interface 109 and at least one fronthaul interface 111 to perform Wi-Fi sharing.
  • the at least one backhaul interface 109 (alternatively referred as station interface, or wireless LAN interface, wlan0) of the intermediate transceiver device 107 may be connected to the first transceiver device 101 for availing internet connectivity.
  • the backhaul interface 109 may be a Wi-Fi interface.
  • the one or more second transceiver devices 105 may be connected to the least one fronthaul interface 111 [alternatively referred as Access Point (AP) interface, or wireless LAN interface, swlan0] of the intermediate transceiver device 107, which may be, as an example, a hotspot interface.
  • AP Access Point
  • the intermediate transceiver device 107 may provide Internet connectivity to the one or more second transceiver devices 105 from the first transceiver device 101 through the at least one fronthaul interface 111 and the at least one backhaul interface 109.
  • the first transceiver device 101 may be configured in the system 200 to transmit a first Target Wake-up Time (TWT) frame over a wireless network 201.
  • the one or more second transceiver devices 105 may be configured in the system 200 to transmit one or more second TWT frames.
  • the first TWT frame, and the one or more second TWT frames may be transmitted to perform a broadcast TWT negotiation or an individual TWT negotiation.
  • the broadcast TWT negotiation may be initiated by the first transceiver device 101, and the individual TWT negotiation may be initiated by the one or more second transceiver devices 105.
  • the intermediate transceiver device 107 may be configured in the system 200 to receive the first TWT frame from the first transceiver device 101 through the backhaul interface 109, and the one or more second TWT frames from the one or more second transceiver devices 105 through the fronthaul interface 111, over a wireless network 201. Based on the received first TWT frame and the one or more second TWT frames, the intermediate transceiver device 107 may determine one or more aligned TWT parameters 203.
  • the intermediate transceiver device 107 may extract one or more first TWT parameters of the first transceiver device 101 from the first TWT frame, and one or more second TWT parameters of the one or more second transceiver devices 105 from the one or more second TWT frames. Further, the intermediate transceiver device 107 may determine presence of at least two second transceiver devices in the one or more second transceiver devices 105. Upon determining that at least two second transceiver devices are present, the intermediate transceiver device 107 may determine an overlap between the one or more second TWT parameters of the at least two second transceiver devices.
  • the intermediate transceiver device 107 may determine the one or more aligned TWT parameters 203.
  • each of, the one or more aligned TWT parameters 203, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a target wake time, a nominal minimum TWT wake duration, a TWT wake interval, and a Target Beacon Transmission Time (TBTT).
  • the target wake time may indicate a future individual TWT SP start time, a next wake TBTT time, or a future broadcast TWT SP start time.
  • the nominal minimum TWT wake duration may indicate the minimum amount of time for the TWT SP in order to complete the frame exchanges.
  • the TWT wake interval may indicate an interval between successive TWT SP.
  • the intermediate transceiver device 107 may synchronize the first transceiver device 101 and the one or more second transceiver devices 105 for Wi-Fi sharing with the one or more second transceiver devices 105.
  • the intermediate transceiver device 107 may perform synchronization based on the one or more aligned TWT parameters 203.
  • the intermediate transceiver device 107 may transmit, to the first transceiver device 101, a frame including TWT parameter information indicating the one or more aligned TWT parameters 203 for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203, when it is determined that there is an overlap between the TWT SPs indicated by the one or more second TWT parameters of the at least two second transceiver devices.
  • the intermediate transceiver device 107 may transmit a frame including the one or more second TWT parameters to the first transceiver device 101 when only one second transceiver device is present or when there is no overlap between the one or more second TWT parameters of the determined at least two second transceiver devices.
  • FIG. 2b and FIG. 2c show exemplary scenarios illustrating synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • FIG. 2b illustrates an exemplary scenario of synchronizing a first transceiver device 101 and a second transceiver device 105 for Wi-Fi sharing .
  • the second transceiver device 105 may initiate individual TWT negotiation.
  • the second transceiver device 105 may transmit an individual TWT frame 115 to the intermediate transceiver device 107.
  • the first transceiver device 101 may transmit an individual TWT frame 113 to the intermediate transceiver device 107.
  • the intermediate transceiver device 107 may receive the individual TWT frame 115 of the second transceiver device 105 through the fronthaul interface 111, and the individual TWT frame 113 of the first transceiver device 101 through the backhaul interface 109.
  • the intermediate transceiver device 107 may extract TWT parameters of the first transceiver device 101 and the second transceiver device 105 from the respective received individual TWT frames 113, 115. Further, intermediate transceiver device 107 may determine presence of only one second transceiver device 105 during the individual TWT negotiation. Based on aforesaid determination, the intermediate transceiver device 107 may transmit a TWT frame including the extracted TWT parameters of the second transceiver device 105 to the first transceiver device 101 through the backhaul interface 109 for performing synchronization.
  • the first transceiver device 101 may align its TWT parameters such as a target wake time and a duration of the TWT service period based on the received TWT parameters.
  • the unsynchronized first TWT service period 117 and the first TWT interval 119 of the first transceiver device 101 may be modified to an aligned first TWT SP 205 and an aligned TWT interval 207, synchronized with the second TWT SP 121, and the second TWT interval 123.
  • occurrence of the first delay 125 and the second delay 127, as illustrated in FIG. 1a may be eliminated due to alignment of the TWT parameters of the first transceiver, as illustrated in FIG. 2b.
  • the second transceiver device 105 and the first transceiver device 101 may communicate Quality of Service (QoS) data frames and acknowledgement frames with each other within the aligned TWT SP without any latency. Further, requirement of retransmission over the wireless network 201 may be decreased due to reduction in the latency, which may also reduce contention associated with the Wi-Fi sharing.
  • QoS Quality of Service
  • FIG. 2c illustrates an exemplary scenario of synchronizing a first transceiver device 101 and multiple second transceiver devices 105 1 , 105 2 , 105 3 for Wi-Fi sharing .
  • each of the second transceiver devices 105 1 , 105 2 , 105 3 may initiate an individual TWT negotiation.
  • each of the second transceiver devices 105 1 , 105 2 , 105 3 may transmit an individual TWT frame 115 1 , 115 2 , 115 3 to the intermediate transceiver device 107.
  • the first transceiver device 101 may transmit an individual TWT frame 113 to the intermediate transceiver device 107.
  • the intermediate transceiver device 107 may receive the individual TWT frame 115 1 , 115 2 , 115 3 of each of the second transceiver devices105 1 , 105 2 , 105 3 through the fronthaul interface 111, and the individual TWT frame 113 of the first transceiver device 101 through the backhaul interface 109.
  • the intermediate transceiver device 107 may extract TWT parameters of the first transceiver device 101 and TWT parameters of each of the second transceiver devices 105 1 , 105 2 , 105 3 from the respective individual TWT frames 113, 115 1 , 115 2 , 115 3 .
  • TWT parameters of the second transceiver devices 105 1 , 105 2 , 105 3 may indicate the intervals 123 1 , 123 2 , and 123 3 of the TWT SPs 121 1 , 121 2 , and 121 3 , respectively.
  • the intermediate transceiver device 107 may determine presence of three second transceiver devices 105 1 , 105 2 , 105 3 during the individual TWT negotiation. Thereafter, the intermediate transceiver device 107 may determine whether there are overlaps between TWT SPs 121 1 , 121 2 , 121 3 of the three second transceiver devices 105 1 , 105 2 , 105 3 indicated by the TWT parameters.
  • the intermediate transceiver device 107 may align TWT SPs 121 1 , 121 2 , 121 3 of the three second transceiver devices 105 1 , 105 2 , 105 3 to determine two aligned TWT SPs 205 1 , 205 3 for the first transceiver device 101, such that overlapped TWT SPs of three second transceiver devices 105 1 , 105 2 , 105 3 can be accommodated in the aligned TWT SPs 205 1 , 205 3 of the first transceiver device 101.
  • the intermediate transceiver device 107 may transmit a TWT frame including TWT parameters indicating the two aligned TWT SPs 205 1 , 205 3 to the first transceiver device 101 through the backhaul interface 109.
  • the intermediate transceiver device 107 may directly transmit the TWT SP 121 2 of the second transceiver device 105 2 to the first transceiver device 101 through the backhaul interface 109.
  • the first transceiver device 101 may align and reschedule its TWT SPs, as illustrated in FIG. 2c. Consequently, latency for each of the three second transceiver devices 105 1 , 105 2 , 105 3 may be reduced.
  • the aforesaid mechanism can be applicable to the broadcast TWT negotiation process as well. Figures and explanation for the broadcast TWT negotiation are not reproduced herein to avoid redundancy. The examples and values thereof are for purposes of illustration only, and are not to be construed in a limiting sense.
  • FIG. 3 shows a block diagram of an intermediate transceiver device in accordance with some embodiments of the present disclosure.
  • the intermediate transceiver device 107 may include a first I/O interface 301, a second I/O interface 303, a processor 305, at least one transceiver antenna 307, and a memory 309.
  • the first I/O interface 301 may be a Wi-Fi interface, and may be communicatively coupled with the first transceiver device 101.
  • the first I/O interface 301 may be configured to receive the first TWT frame 113 from the first transceiver device 101 during a broadcast TWT negotiation or an individual TWT negotiation.
  • the first I/O interface 301 may also be configured to send the one or more aligned TWT parameters 203 to the first transceiver device 101.
  • the second I/O interface 303 may be a hotspot interface, and may be communicatively coupled with the one or more one or more second transceiver devices 105.
  • the second I/O interface 303 may be configured to receive the one or more second TWT frames 115 from the one or more second transceiver devices 105 during the broadcast TWT negotiation or the individual TWT negotiation.
  • the second I/O interface 303 may also be configured to send the one or more first TWT parameters of the first transceiver device 101 to the one or more second transceiver devices 105.
  • the first I/O interface 301, the second I/O interface 303 may be associated with the at least one transceiver antenna 307 for performing communication with the first transceiver device 101, and one or more second transceiver devices 105, respectively.
  • the processor 305 may receive the first TWT frame 113 and the one or more second TWT frames 115 transmitted from the first transceiver device 101 and the one or more second transceiver devices 105, respectively, through the at least one transceiver antenna 307. Further, based on the received first TWT frame 113 and the one or more second TWT frames 115, the processor 305 may determine one or more aligned TWT parameters 203. The processor 305 may further synchronize the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203 for Wi-Fi sharing with the one or more second transceiver devices 105. To perform the aforesaid method steps, the processor 305 may utilize various modules 313 and memory 309 of the intermediate transceiver device 107.
  • the memory 309 may store data 311 received through the first I/O interface 301, the second I/O interface 303, the processor 305, and the modules 313.
  • the data 311 may include first TWT data 311 1 , second TWT data 311 2 , overlapping data 311 3 , synchronization data 311 4 , negotiation data 311 5 , and other data 311 6 .
  • the first TWT data 311 1 may include one or more first TWT parameters of the first transceiver device 101 extracted from the received first TWT frame 113.
  • the second TWT data 311 2 may include one or more second TWT parameters of the one or more second transceiver devices 105 extracted from the received one or more second TWT frames 115.
  • the overlapping data 311 3 may include data related to overlap between the one or more second TWT parameters of the at least two second transceiver devices.
  • the synchronization data 311 4 may include the one or more aligned TWT parameters 203.
  • the negotiation data 311 5 may include data related to broadcast TWT and individual TWT.
  • the other data 311 6 may store data, including temporary data and temporary files generated by the processor 305, and modules 313 for performing the various functions of the intermediate transceiver device 107.
  • the data stored in the memory 309 may be processed by the modules 313 of the intermediate transceiver device 107.
  • the modules 313 may be communicatively coupled to the processor 305 configured in the intermediate transceiver device 107.
  • the modules 313 may be present outside the memory 309 as shown in FIG. 3 and implemented as separate hardware.
  • the term modules 313 may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the modules 313 may include, for example, a receiving module 315, a transmitting module 319, a determination module 321, a synchronization module 323, and other modules 325.
  • the other modules 325 may be used to perform various miscellaneous functionalities of the intermediate transceiver device 107.
  • aforementioned modules 313 may be represented as a single module or a combination of different modules.
  • the one or more modules 313 may be stored in the memory 309, without limiting the scope of the disclosure. The said modules 313 when configured with the functionality defined in the present disclosure will result in a novel hardware.
  • the receiving module 315 may receive the first TWT frame 113 from the first transceiver device 101 through the first I/O interface 301. Further, the receiving module 315 may receive one or more second TWT frames 115 from the one or more second transceiver devices 105 through the second I/O interface 303. Further, the receiving module 315 may send the first TWT frame 113, and the one or more second TWT frames 115 to the determination module 321 for further processing.
  • a first smartphone may share data connectivity from a Wi-Fi router to a laptop and a second smartphone.
  • the first smartphone may have a Wi-Fi interface and a hotspot interface enabled.
  • the first smartphone may be connected to a Wi-Fi router through the Wi-Fi interface.
  • the laptop and the second smartphone may be connected to the first smartphone through the hotspot interface.
  • the laptop and the second smartphone may initiate individual TWT negotiation and may send the respective second TWT frames 115 to the first smartphone.
  • the receiving module 315 of the first smartphone may receive the second TWT frames 115 from the laptop and the second smartphone through the hotspot interface.
  • the Wi-Fi router may send the first TWT frame 113 to the first smartphone.
  • the receiving module 315 of the first smartphone may receive the first TWT frame 113 from the Wi-Fi router through the Wi-Fi interface. Further, the receiving module 315 of the first smartphone may send the received first TWT frame 113, and the second TWT frames 115 to the determination module 321 of the first smartphone.
  • the receiving module 315 may receive the first TWT frame 113 and the one or more second TWT frames 115 during a broadcast TWT negotiation or an individual TWT negotiation.
  • the individual TWT negotiation may be initiated by the one or more second transceiver devices 105 connected to the second I/O interface 303, and the broadcast TWT negotiation may be initiated by the first transceiver device 101 connected to the first I/O interface 301.
  • the first transceiver device 101 may send the first TWT parameters in a beacon frame or other management frames using a TWT element (herein referred as the first TWT frame 113) to the intermediate transceiver device 107.
  • a TWT element herein referred as the first TWT frame 113
  • the TWT element may comprise an element ID field, a length field, a control field, a request type field, a TWT field, a nominal minimum TWT wake duration field, a TWT wake interval mantissa field, and a broadcast TWT information field.
  • the receiving module 315 may comprise an identification module 317.
  • the identification module 317 may verify the control field of the TWT element to identify whether the received first TWT frame 113 pertains to the broadcast TWT negotiation or individual TWT negotiation. If it is identified that the received first TWT frame 113 pertains to the broadcast TWT negotiation, the identification module 317 may send the received first TWT frame 113 to the transmitting module 319 for further processing.
  • the transmitting module 319 may receive the first TWT frame 113 associated with the broadcast TWT negotiation from the receiving module 315. Further, the transmitting module 319 may transmit the first TWT frame 113 to the one or more second transceiver devices 105 supporting the broadcast TWT negotiation through the second I/O interface 303.
  • the determination module 321 may determine one or more aligned TWT parameters 203 based on the received first TWT frame 113 and the one or more second TWT frames 115. Particularly, the determination module 321 may receive the first TWT frame 113 and the one or more second TWT frames 115 from the receiving module 315. The determination module 321 may extract one or more first TWT parameters of the first transceiver device 101 from the first TWT frame 113, and one or more second TWT parameters of the one or more second transceiver devices 105 from the one or more second TWT frames 115.
  • Each of, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a TWT Service Period (SP), a TWT minimum wakeup time, and a Target Beacon Transmission Time (TBTT). Further, the determination module 321 may determine whether at least two second transceiver devices are present in the one or more second transceiver devices 105. In other words, the determination module 321 may determine number of second transceiver devices connected to the second I/O interface 303 to avail Wi-Fi connectivity. When it is determined that at least two second transceiver devices are connected, the determination module 321 may determine whether there is an overlap between the one or more second TWT parameters of the at least two second transceiver devices.
  • SP TWT Service Period
  • TWT minimum wakeup time a TWT minimum wakeup time
  • TBTT Target Beacon Transmission Time
  • the determination module 321 may determine the one or more aligned TWT parameters 203 based on the one or more first TWT parameters and the one or more overlapping second TWT parameters. The determination module 321 may send the determined one or more aligned TWT parameters 203 to the synchronization module 323.
  • the determination module 321 may receive the first TWT frame 113 including TWT parameters indicating that the target wake time of the Wi-Fi router is equal to t 3 and the duration of the TWT SP of the Wi-Fi router is equal to 20ms, from the receiving module 315.
  • the determination module 321 may receive the second TWT frames 115 including TWT parameters indicating that the target wake times of the laptop and the second smartphone are equal to t 1 , and t 2 , and the duration of the TWT SPs of the laptop and the second smartphone are 20ms, from the receiving module 315.
  • the determination module 321 may extract TWT parameters indicating the duration of the TWT SPs and the target wake times of the Wi-Fi router, the laptop and the second smartphone. Based on the extracted TWT parameters, the determination module 321 may determine the target wake times of the laptop, the second smartphone and the Wi-Fi router to be t 1 , t 2 , and t 3 , respectively. Further, based on the extracted TWT parameters, the determination module 321 may determine the duration of the TWT SPs of each of the laptop, the second smartphone and the Wi-Fi router to 20 ms. Further, the determination module 321 may determine that two second transceiver devices are connected to the hotspot interface of the first smartphone.
  • the determination module 321 may determine whether the TWT SPs of the laptop and the second smartphone overlap with each other. The determination module 321 may determine that there is the overlap between the TWT SP of the laptop and the TWT SP of the second smartphone by determining relationship between the target wake times of the laptop and the second smartphone, for example, when the following mathematical expression is satisfied:
  • the determination module 321 may determine that the TWT SP of the second smartphone overlaps with the TWT SP of the laptop. Further, assume that:
  • the determination module 321 may determine the target wake time and the duration of the aligned TWT SP for the Wi-Fi router to be t 1 and 30 ms, respectively, such that both the overlapped TWT SPs of the laptop and the second smartphone can be accommodated in single aligned TWT SP of the Wi-Fi router.
  • the determination module 321 may adaptively extend the duration of the aligned TWT SP from the initial value of 20 ms to 30 ms, and may adaptively shift the target wake time of the aligned TWT SP from the initial value of t 3 to t 1 .
  • the determination module 321 may determine that only one second transceiver device is connected to the intermediate transceiver device 107 or there is no overlap between the one or more second TWT parameters of the at least two second transceiver devices. Based on this, the determination module 321 may send the extracted one or more second TWT parameters to the synchronization module 323. As an example, when the laptop and the second smartphone are communicatively connected to the first smartphone, the determination module 321 may determine that:
  • the determination module 321 of the first smartphone may determine that the TWT SPs of the laptop and the second smartphone do not overlap with each other. Accordingly, the determination module 321 may send, to the synchronization module 323, TWT parameters indicating that the target wake times and the duration of the TWT SPs of the laptop and the second smartphone are t 1 , t 2 , and 20 ms, respectively.
  • the synchronization module 323 may synchronize the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203 for Wi-Fi sharing with the one or more second transceiver devices 105. Particularly, the synchronization module 323 may receive the one or more aligned TWT parameters 203 from the determination module 321, and may transmit the one or more aligned TWT parameters 203 to the first transceiver device 101 through the first I/O interface 301. The one or more aligned TWT parameters 203 may be transmitted for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203.
  • the synchronization module 323 of the first smartphone may transmit, to the Wi-Fi router, a TWT frame including TWT parameter information indicating the duration of the aligned TWT SP is equal to 30 ms and the target wake time of the aligned TWT SP is equal to t 1 .
  • the Wi-Fi router may wake only once at a target wake time t 1 for a duration of 30 ms.
  • the synchronization module 323 may receive the one or more second TWT parameters from the determination module 321.
  • the synchronization module 323 may transmit the one or more second TWT parameters to the first transceiver device 101 through the first I/O interface 301 when it is determined that only one second transceiver device is connected to the intermediate transceiver device 107 or there is no overlap between the one or more second TWT parameters of the at least two second transceiver devices.
  • the synchronization module 323 of the first smartphone may transmit, to the Wi-Fi router, a TWT frame including TWT parameter information indicating that the target wake times of the laptop and the second smartphone are equal to t 1 , and t 2 , and the duration of the TWT SPs of the laptop and the second smartphone is equal to 20 ms.
  • the Wi-Fi router may wake twice. Particularly, the Wi-Fi router may firstly wake at t 1 for a duration of 20 ms, and secondly wake at t 2 for a duration of 20 ms.
  • FIG. 4 shows a flow chart illustrating a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
  • the method 400 includes one or more blocks illustrating a method of synchronizing a first transceiver device 101 and one or more second transceiver devices 105 for Wi-Fi sharing.
  • the order in which the method 400 is described is not intended to be construed as a limitation, and any number of the described method blocks can be combined in any order to implement the method. Additionally, individual blocks may be deleted from the methods without departing from the scope of the subject matter described herein.
  • the method can be implemented in any suitable hardware, software, firmware, or combination thereof.
  • the method may include receiving, by an intermediate transceiver device 107, a first Target Wake-up Time (TWT) frame from the first transceiver device 101 and one or more second TWT frames 115 from the one or more second transceiver devices 105 over a wireless network 201.
  • the intermediate transceiver device 107 may be communicatively coupled between the first transceiver device 101 and the one or more second transceiver devices 105.
  • the first TWT frame 113 and the one or more second TWT frames 115 may be received during a broadcast TWT negotiation or an individual TWT negotiation.
  • the broadcast TWT negotiation may be initiated by the first transceiver device 101.
  • the individual TWT negotiation may be initiated by one of the one or more second transceiver devices 105.
  • the method may include determining, by the intermediate transceiver device 107, one or more aligned TWT parameters 203 based on the received first TWT frame 113 and the one or more second TWT frames 115. Particularly, one or more first TWT parameters of the first transceiver device 101 may be extracted from the first TWT frame 113. Also, one or more second TWT parameters of the one or more second transceiver devices 105 may be extracted from the one or more second TWT frames 115. Further, presence of at least two second transceiver devices in the one or more second transceiver devices 105 may be determined.
  • an overlap between the one or more second TWT parameters of the at least two second transceiver devices may be determined.
  • the one or more aligned TWT parameters 203 may be determined.
  • each of, the one or more aligned TWT parameters 203, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a target wake time, a nominal minimum TWT wake duration, a TWT wake interval and a Target Beacon Transmission Time (TBTT).
  • TBTT Target Beacon Transmission Time
  • the method may include synchronizing, by the intermediate transceiver device 107, the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203.
  • the synchronization may be performed for Wi-Fi sharing by the intermediate transceiver device 107 with the one or more second transceiver devices 105.
  • the one or more aligned TWT parameters 203 may be transmitted to the first transceiver device 101 for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203.
  • the one or more second TWT parameters may be transmitted to the first transceiver device 101 for aligning the one or more first TWT parameters with the one or more second TWT parameters.
  • the one or more second TWT parameters may be transmitted, specifically upon determining presence of one second transceiver device in the one or more second transceiver devices 105, or determining no overlap between the one or more second TWT parameters of the at least two second transceiver devices.
  • FIG. 5 illustrates a block diagram of an exemplary computer system 500 for implementing embodiments consistent with the present disclosure.
  • the computer system 500 may be a system for synchronizing a first transceiver device 101 and one or more second transceiver devices 105 for Wi-Fi sharing.
  • the computer system 500 may include a central processing unit (“CPU” or "processor") 502.
  • the processor 502 may comprise at least one data processor for executing program components for executing user or system-generated business processes.
  • the processor 502 may include specialized processing units such as integrated system (bus) controllers, memory management control units, floating point units, graphics processing units, digital signal processing units, etc.
  • the processor 502 may be disposed in communication with one or more input/output (I/O) devices (511 and 512) via I/O interface 501.
  • the I/O interface 501 may employ communication protocols/methods such as, without limitation, audio, analog, digital, stereo, IEEE-1394, serial bus, Universal Serial Bus (USB), infrared, PS/2, BNC, coaxial, component, composite, Digital Visual Interface (DVI), high-definition multimedia interface (HDMI), Radio Frequency (RF) antennas, S-Video, Video Graphics Array (VGA), IEEE 802.n /b/g/n/x, Bluetooth, cellular (e.g., Code-Division Multiple Access (CDMA), High-Speed Packet Access (HSPA+), Global System For Mobile Communications (GSM), Long-Term Evolution (LTE) or the like), etc.
  • the computer system 500 may communicate with one or more I/O devices 511 and 512.
  • the processor 502 may be disposed in communication with a wireless communication network 201 via a network interface 503.
  • the network interface 503 may communicate with the wireless communication network 201.
  • the network interface 503 may employ connection protocols including, without limitation, direct connect, Ethernet (e.g., twisted pair 10/100/1000 Base T), Transmission Control Protocol/Internet Protocol (TCP/IP), token ring, IEEE 802.11a/b/g/n/x, etc.
  • the wireless communication network 201 can be implemented as one of the several types of networks, such as intranet or Local Area Network (LAN) and such within the organization.
  • the wireless communication network 201 may either be a dedicated network or a shared network, which represents an association of several types of networks that use a variety of protocols, for example, Hypertext Transfer Protocol (HTTP), Transmission Control Protocol/Internet Protocol (TCP/IP), Wireless Application Protocol (WAP), etc., to communicate with each other.
  • HTTP Hypertext Transfer Protocol
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • WAP Wireless Application Protocol
  • the communication network 201 may include a variety of network devices, including routers, bridges, servers, computing devices, storage devices, etc.
  • the processor 502 may be disposed in communication with a memory 505 (e.g., RAM 513, ROM 514, etc. as shown in FIG. 5 ) via a storage interface 504.
  • the storage interface 504 may connect to memory 505 including, without limitation, memory drives, removable disc drives, etc., employing connection protocols such as Serial Advanced Technology Attachment (SATA), Integrated Drive Electronics (IDE), IEEE-1394, Universal Serial Bus (USB), fiber channel, Small Computer Systems Interface (SCSI), etc.
  • the memory drives may further include a drum, magnetic disc drive, magneto-optical drive, optical drive, Redundant Array of Independent Discs (RAID), solid-state memory devices, solid-state drives, etc.
  • the memory 505 may store a collection of program or database components, including, without limitation, user /application 506, an operating system 507, a web browser 508, mail client 515, mail server 516, web server 517 and the like.
  • computer system 500 may store user /application data 506, such as the data, variables, records, etc. as described in this disclosure.
  • databases may be implemented as fault-tolerant, relational, scalable, secure databases such as Oracle R or Sybase R .
  • the operating system 507 may facilitate resource management and operation of the computer system 500.
  • Examples of operating systems include, without limitation, APPLE MACINTOSH R OS X, UNIX R , UNIX-like system distributions (E.G., BERKELEY SOFTWARE DISTRIBUTION TM (BSD), FREEBSD TM , NETBSD TM , OPENBSD TM , etc.), LINUX DISTRIBUTIONS TM (E.G., RED HAT TM , UBUNTU TM , KUBUNTU TM , etc.), IBM TM OS/2, MICROSOFT TM WINDOWS TM (XP TM , VISTA TM /7/8, 10 etc.), APPLE R IOS TM , GOOGLE R ANDROID TM , BLACKBERRY R OS, or the like.
  • a user interface may facilitate display, execution, interaction, manipulation, or operation of program components through textual or graphical facilities.
  • user interfaces may provide computer interaction interface elements on a display system operatively connected to the computer system 500, such as cursors, icons, check boxes, menus, windows, widgets, etc.
  • GUIs Graphical User Interfaces
  • GUIs may be employed, including, without limitation, APPLE MACINTOSH R operating systems, IBM TM OS/2, MICROSOFT TM WINDOWS TM (XP TM , VISTA TM /7/8, 10 etc.), Unix R X-Windows, web interface libraries (e.g., AJAX TM , DHTML TM , ADOBE ® FLASH TM , JAVASCRIPT TM , JAVA TM , etc.), or the like.
  • GUIs Graphical User Interfaces
  • a computer-readable storage medium refers to any type of physical memory on which information or data readable by a processor may be stored.
  • a computer-readable storage medium may store instructions for execution by one or more processors, including instructions for causing the processor(s) to perform steps or stages consistent with the embodiments described herein.
  • the term "computer-readable medium” should be understood to include tangible items and exclude carrier waves and transient signals, i.e., non-transitory. Examples include Random Access Memory (RAM), Read-Only Memory (ROM), volatile memory, nonvolatile memory, hard drives, Compact Disc (CD) ROMs, Digital Video Disc (DVDs), flash drives, disks, and any other known physical storage media.
  • the present disclosure provides a method, an intermediate transceiver device and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
  • the present disclosure provides a method for aligning one or more first TWT parameters of the first transceiver device with one or more aligned TWT parameters or one or more second TWT parameters, which improves synchronization between the first transceiver device and one or more second transceiver devices.
  • the present disclosure reduces contention in a communication medium and a latency on each of the one or more second transceiver devices during Wi-Fi sharing due to the improved synchronization.
  • the present disclosure reduces requirement of retransmission of Quality-of-Service (QoS) data frames and acknowledgment frames due to the reduced contention, thereby improving bandwidth utilization.
  • QoS Quality-of-Service
  • the present disclosure reduces power consumption at a backhaul interface and a fronthaul interface of the intermediate transceiver device due to the improved synchronization.
  • the present disclosure improves power efficiency of a battery-operated intermediate transceiver device due to the reduced power consumption at the backhaul interface and the fronthaul interface.
  • an embodiment means “one or more (but not all) embodiments of the disclosure(s)" unless expressly specified otherwise.

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Abstract

Disclosed herein is a method, an intermediate transceiver device, and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing. The intermediate transceiver device, receives a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network, determines one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames, and synchronizes the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters, for Wi-Fi sharing with the one or more second transceiver devices.

Description

METHOD OF SYNCHRONIZING TRANSCEIVER DEVICES FOR WI-FI SHARING, INTERMEDIATE TRANSCEIVER DEVICE AND SYSTEM THEREOF
The disclosure is generally related to Wi-Fi sharing, and more particularly to, for example, but not limited to, a method, an intermediate transceiver device and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
In Wi-Fi sharing, data connectivity from a Wi-Fi access point (herein referred as a first transceiver device) is shared to station devices (herein referred as second transceiver devices) through an intermediate transceiver device. Basically, in the Wi-Fi sharing, the station devices access Internet services provided by the Wi-Fi access point, without obtaining and manually entering a Wi-Fi password. Instead of connecting to the Wi-Fi access point through use of the Wi-Fi password, the station devices remain connected with the intermediate transceiver device, which is wirelessly connected with the Wi-Fi access point. To perform the Wi-Fi sharing, the intermediate transceiver device enables two separate interfaces such as a Wi-Fi interface (alternatively referred as backhaul interface or Station (STA) interface) and a hotspot interface (alternatively referred as fronthaul interface or Access Point (AP) interface). The station devices communicate with the intermediate transceiver device through the hotspot interface, and the intermediate transceiver device communicate with the Wi-Fi access point through the Wi-Fi interface. However, there is no mechanism for synchronizing Target Wake Time (TWT) parameters of Wi-Fi access point and the station devices through the intermediate transceiver device to provide improved internet accessibility to the station devices in Wi-Fi sharing.
FIG. 1a shows a system 100 illustrating unsynchronized TWT exchanges during Wi-Fi sharing. The intermediate transceiver device 107 receives a first TWT frame 113 from the first transceiver device 101 through the backhaul interface 109 and a second TWT frame 115 from the second transceiver device 105 through the fronthaul interface 111. The first TWT frame 113 and the second TWT frame 115 may comprise TWT parameters such as a target wake time, a duration of a TWT service period (SP) and a TWT interval between TWT SPs with regards to the first transceiver device 101 and the second transceiver device 105, respectively. The target wake time may indicate a future individual TWT SP start time, a next wake TBTT time, or a future broadcast TWT SP start time. The duration of the TWT SP may indicate the amount of time occupied by the TWT SP. In some scenarios, a first TWT SP 117 and a first TWT interval 119 associated with the first transceiver device 101 are different from a second TWT SP 121 and a second TWT interval 123 associated with the second transceiver device 105, as illustrated in FIG. 1a. This introduces a first delay 125 and a second delay 127 between the TWT SPs of the first transceiver device 101 and the second transceiver device 105. In such scenario, the first transceiver device 101 and the second transceiver device 105 fail to communicate quality-of-service (QoS) data frames and acknowledgment frames with each other in single TWT SP duration. An increase in the number of second transceiver devices gives rise to occurrence of contention. Consequently, retransmission of QoS data frames and acknowledgment frames is required, which further increases latency. Also, with increase in the number of second transceiver devices, the fronthaul interface 111 wakes up frequently, even during sleep duration of the first transceiver device 101. Similarly, the backhaul interface 109 of the intermediate transceiver device 107 wakes up unnecessarily, even when the second transceiver devices do not send any QoS frames or acknowledgement frames. This increases power consumption at both the fronthaul interface 111 and the backhaul interface 109 of the intermediate transceiver device 107. A battery of the intermediate transceiver device 107 runs out of power quickly due to such excess power consumption, resulting in poor experience of a user of the intermediate transceiver device 107 during the Wi-Fi sharing.
FIG. 1b shows an example illustrating latency introduced due to unsynchronized TWT exchanges during Wi-Fi sharing. In the example, the TWT SP is of 20 milliseconds, a Target Beacon Transmission Time (TBTT) is of 100 milliseconds and a beacon interval is of 100 milliseconds. Within the TWT SP, two data frames and corresponding two acknowledgement frames can be exchanged. As illustrated in FIG. 1b, each of the first transceiver device 101 and the second transceiver device 105 wakes for 20 milliseconds in each 100 milliseconds time interval. Accordingly, the backhaul interface 109 and the fronthaul interface 111 of the intermediate transceiver device 107 need to wake for at least 20 milliseconds to communicate with the first transceiver device 101 and the second transceiver device 105, respectively. However, due to lack of synchronization of TWT SPs of the first transceiver device 101 and the second transceiver device 105, wake-up times for the first transceiver device 101 and the second transceiver device 105 become different. As an example, the first transceiver device 101 wakes up after 55 milliseconds from a beacon transmission time, and the second transceiver device 105 wakes up after 20 milliseconds from the beacon transmission time. Due to this mismatch in the wake-up times, the second transceiver device 105 connected to the the fronthaul interface 111 of the intermediate transceiver device 107 faces a latency of 35 milliseconds. To avoid the latency, the backhaul interface 109 needs to wake up for sending a request for traffic to the first transceiver device 101 using Power Save (PS) poll mechanism. A radio wakeup time of the backhaul interface 109 may include a Distributed Inter-Frame Space (DIFS) time, a PS poll time, a Contention Window (CW) time, a Request To Send (RTS) time, a Short Inter-frame Spacing (SIFS) time, a Clear To Send (CTS) time, one or more data packets transmission times, one or more acknowledgements times, one or more collision time periods and a next TWT SP. Thus, the radio wakeup time of the backhaul interface 109 becomes greater than the TWT SP due to higher probability of collisions caused by the unsynchronized TWT exchanges. Consequently, power consumption at the backhaul interface 109 increases.
The information disclosed in this background section should not be assumed to be an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art merely because it is set forth in the background section. The background section may describe aspects or embodiments of the present disclosure.
The present disclosure discloses a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing. The method comprises receiving, by an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices, a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network. Further, the method comprises determining, by the intermediate transceiver device, one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames. Thereafter, the method comprises synchronizing, by the intermediate transceiver device, the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters for Wi-Fi sharing with the one or more second transceiver devices.
Further, the present disclosure discloses an intermediate transceiver device for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing. The intermediate transceiver device comprises a processor; and a memory communicatively coupled to the processor. Here, the processor receives a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network. The intermediate transceiver device is communicatively coupled between the first transceiver device and the one or more second transceiver devices. Based on the received first TWT frame and the one or more second TWT frames, the processor determines one or more aligned TWT parameters. Further, based on the one or more aligned TWT parameters, the processor synchronizes the first transceiver device and the one or more second transceiver devices for Wi-Fi sharing with the one or more second transceiver devices.
Furthermore, the present disclosure discloses a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing. The system comprises the first transceiver device, the one or more second transceiver devices, and an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices. The first transceiver device transmits a first Target Wake-up Time (TWT) frame. The one or more second transceiver devices transmit one or more second TWT frames. Further, the intermediate transceiver device receives the first TWT frame from the first transceiver device and the one or more second TWT frames from the one or more second transceiver devices over a wireless network. Based on the received first TWT frame and the one or more second TWT frames, the intermediate transceiver device determines one or more aligned TWT parameters. Based on the one or more aligned TWT parameters, the intermediate transceiver device synchronizes the first transceiver device and the one or more second transceiver devices. The synchronization is performed for Wi-Fi sharing with the one or more second transceiver devices.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, explain the disclosed principles. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present disclosure are now described, by way of example only, and regarding the accompanying figures, in which:
FIG. 1a shows a system illustrating unsynchronized TWT exchanges during WI-FI sharing.
FIG. 1b shows an example illustrating latency introduced due to unsynchronized TWT exchanges during Wi-Fi sharing.
FIG. 2a shows a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
FIG. 2b and FIG. 2c show exemplary scenarios illustrating synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
FIG. 3 shows a block diagram of an intermediate transceiver device in accordance with some embodiments of the present disclosure.
FIG. 4 shows a flow chart illustrating a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
FIG. 5 shows a block diagram of an exemplary computer system for implementing embodiments consistent with the present disclosure.
It should be appreciated by those skilled in the art that any flow diagrams and timing diagrams herein represent conceptual views of illustrative device embodying the principles of the present disclosure. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether such computer or processor is explicitly shown.
In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present disclosure described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the specific forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
The terms "comprises", "comprising", "includes", "including", "have", "having", "contains", "containing", "carrys", "carrying", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
Embodiments of the present disclosure may relate to a method, an intermediate transceiver device, and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing. The intermediate transceiver device may be communicatively coupled between the first transceiver device and the one or more second transceiver devices for performing Wi-Fi sharing. Particularly, the intermediate transceiver device may be wirelessly connected to the first transceiver device to avail data connectivity. Here, the first transceiver device may be a Wi-Fi access point for providing internet access to the intermediate transceiver device. Further, the one or more second transceiver devices may be connected to the intermediate transceiver device through a hotspot interface to avail the data connectivity from the first transceiver device.
The present disclosure synchronizes or aligns Target Wake-up Time (TWT) parameters and TWT SPs of the first transceiver device and the one or more second transceiver devices to improve sharing the data connectivity from the first transceiver device to the one or more second transceiver devices via the intermediate transceiver device. Here, determination of one or more aligned TWT parameters is performed based on the TWT frames received from the first transceiver device and the one or more second transceiver devices during an individual TWT negotiation or a broadcast TWT negotiation process. By synchronizing the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters, unnecessary wake ups caused due to unsynchronized TWT exchanges is prevented. Consequently, power consumption on a fronthaul interface and a backhaul interface of the intermediate transceiver device associated with the unnecessary wake ups is significantly reduced. Moreover, probability of collisions during the Wi-Fi sharing operation, latency as well as channel contention associated with Wi-Fi sharing operation are reduced significantly, as random wake ups are avoided. With reduction in the probability of collisions, the radio wakeup time of the backhaul interface is reduced. Also, synchronization based on the one or more aligned TWT parameters reduces requirement of retransmission over the wireless network due to reduced contention, thereby improving bandwidth utilization.
FIG. 2a shows a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
As shown in FIG. 2a, the system 200 may comprise a first transceiver device 101, one or more second transceiver devices 1051, 1052, 1053.................105N (collectively referred as one or more second transceiver devices 105), and an intermediate transceiver device 107. The intermediate transceiver device 107 may be communicatively coupled between the first transceiver device 101 and the one or more second transceiver devices 105. As an example, the first transceiver device 101 may include, but not limited to, a Wi-Fi Access Point (AP) or Wi-Fi router installed in a home environment, and an office environment etc. The first transceiver device 101 may be directly connected to an Internet 103 modem. The first transceiver device 101 may operate as a hub to broadcast an internet signal to one or more Wi-Fi enabled devices within a predefined network coverage area of the first transceiver device 101. As an example, each of the one or more second transceiver devices 105 may include, be implemented as, or be included in, but not limited to, one of a smartphone, a laptop, a desktop, a smartwatch, a smart television, a smart speaker, a tablet, Personal Digital Assistance (PDA), and an Internet of Things (IoT) device. As an example, the intermediate transceiver device 107 may include, be implemented as, or be included in, but not limited to, a smartphone, an extended router, a wireless repeater, a Wi-Fi range extender, a laptop, and a desktop.
As illustrated in FIG. 2a, the intermediate transceiver device 107 may have at least one backhaul interface 109 and at least one fronthaul interface 111 to perform Wi-Fi sharing. The at least one backhaul interface 109 (alternatively referred as station interface, or wireless LAN interface, wlan0) of the intermediate transceiver device 107 may be connected to the first transceiver device 101 for availing internet connectivity. As an example, the backhaul interface 109 may be a Wi-Fi interface. Further, the one or more second transceiver devices 105 may be connected to the least one fronthaul interface 111 [alternatively referred as Access Point (AP) interface, or wireless LAN interface, swlan0] of the intermediate transceiver device 107, which may be, as an example, a hotspot interface. During Wi-Fi sharing, the intermediate transceiver device 107 may provide Internet connectivity to the one or more second transceiver devices 105 from the first transceiver device 101 through the at least one fronthaul interface 111 and the at least one backhaul interface 109.
In an embodiment, the first transceiver device 101 may be configured in the system 200 to transmit a first Target Wake-up Time (TWT) frame over a wireless network 201. Further, the one or more second transceiver devices 105 may be configured in the system 200 to transmit one or more second TWT frames. The first TWT frame, and the one or more second TWT frames may be transmitted to perform a broadcast TWT negotiation or an individual TWT negotiation. Basically, the broadcast TWT negotiation may be initiated by the first transceiver device 101, and the individual TWT negotiation may be initiated by the one or more second transceiver devices 105.
In an embodiment, the intermediate transceiver device 107 may be configured in the system 200 to receive the first TWT frame from the first transceiver device 101 through the backhaul interface 109, and the one or more second TWT frames from the one or more second transceiver devices 105 through the fronthaul interface 111, over a wireless network 201. Based on the received first TWT frame and the one or more second TWT frames, the intermediate transceiver device 107 may determine one or more aligned TWT parameters 203. Particularly, the intermediate transceiver device 107 may extract one or more first TWT parameters of the first transceiver device 101 from the first TWT frame, and one or more second TWT parameters of the one or more second transceiver devices 105 from the one or more second TWT frames. Further, the intermediate transceiver device 107 may determine presence of at least two second transceiver devices in the one or more second transceiver devices 105. Upon determining that at least two second transceiver devices are present, the intermediate transceiver device 107 may determine an overlap between the one or more second TWT parameters of the at least two second transceiver devices. Based on the one or more first TWT parameters and the one or more overlapping second TWT parameters, the intermediate transceiver device 107 may determine the one or more aligned TWT parameters 203. Here, each of, the one or more aligned TWT parameters 203, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a target wake time, a nominal minimum TWT wake duration, a TWT wake interval, and a Target Beacon Transmission Time (TBTT). The target wake time may indicate a future individual TWT SP start time, a next wake TBTT time, or a future broadcast TWT SP start time. The nominal minimum TWT wake duration may indicate the minimum amount of time for the TWT SP in order to complete the frame exchanges. The TWT wake interval may indicate an interval between successive TWT SP.
In an embodiment, the intermediate transceiver device 107 may synchronize the first transceiver device 101 and the one or more second transceiver devices 105 for Wi-Fi sharing with the one or more second transceiver devices 105. The intermediate transceiver device 107 may perform synchronization based on the one or more aligned TWT parameters 203. Particularly, the intermediate transceiver device 107 may transmit, to the first transceiver device 101, a frame including TWT parameter information indicating the one or more aligned TWT parameters 203 for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203, when it is determined that there is an overlap between the TWT SPs indicated by the one or more second TWT parameters of the at least two second transceiver devices. However, the intermediate transceiver device 107 may transmit a frame including the one or more second TWT parameters to the first transceiver device 101 when only one second transceiver device is present or when there is no overlap between the one or more second TWT parameters of the determined at least two second transceiver devices.
Example illustrations
FIG. 2b and FIG. 2c show exemplary scenarios illustrating synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
FIG. 2b illustrates an exemplary scenario of synchronizing a first transceiver device 101 and a second transceiver device 105 for Wi-Fi sharing. As shown in FIG. 2b, the second transceiver device 105 may initiate individual TWT negotiation. The second transceiver device 105 may transmit an individual TWT frame 115 to the intermediate transceiver device 107. Further, the first transceiver device 101 may transmit an individual TWT frame 113 to the intermediate transceiver device 107. The intermediate transceiver device 107 may receive the individual TWT frame 115 of the second transceiver device 105 through the fronthaul interface 111, and the individual TWT frame 113 of the first transceiver device 101 through the backhaul interface 109. Upon receiving the individual TWT frames 115, the intermediate transceiver device 107 may extract TWT parameters of the first transceiver device 101 and the second transceiver device 105 from the respective received individual TWT frames 113, 115. Further, intermediate transceiver device 107 may determine presence of only one second transceiver device 105 during the individual TWT negotiation. Based on aforesaid determination, the intermediate transceiver device 107 may transmit a TWT frame including the extracted TWT parameters of the second transceiver device 105 to the first transceiver device 101 through the backhaul interface 109 for performing synchronization. Further, the first transceiver device 101 may align its TWT parameters such as a target wake time and a duration of the TWT service period based on the received TWT parameters. Referring to FIG. 2a and FIG. 2b, the unsynchronized first TWT service period 117 and the first TWT interval 119 of the first transceiver device 101 may be modified to an aligned first TWT SP 205 and an aligned TWT interval 207, synchronized with the second TWT SP 121, and the second TWT interval 123. Further, occurrence of the first delay 125 and the second delay 127, as illustrated in FIG. 1a may be eliminated due to alignment of the TWT parameters of the first transceiver, as illustrated in FIG. 2b. Consequently, the second transceiver device 105 and the first transceiver device 101 may communicate Quality of Service (QoS) data frames and acknowledgement frames with each other within the aligned TWT SP without any latency. Further, requirement of retransmission over the wireless network 201 may be decreased due to reduction in the latency, which may also reduce contention associated with the Wi-Fi sharing.
FIG. 2c illustrates an exemplary scenario of synchronizing a first transceiver device 101 and multiple second transceiver devices 1051, 1052, 1053 for Wi-Fi sharing. As shown in FIG. 2c, each of the second transceiver devices 1051, 1052, 1053 may initiate an individual TWT negotiation. Here, each of the second transceiver devices 1051, 1052, 1053 may transmit an individual TWT frame 1151, 1152, 1153 to the intermediate transceiver device 107. Further, the first transceiver device 101 may transmit an individual TWT frame 113 to the intermediate transceiver device 107. The intermediate transceiver device 107 may receive the individual TWT frame 1151, 1152, 1153 of each of the second transceiver devices1051, 1052, 1053 through the fronthaul interface 111, and the individual TWT frame 113 of the first transceiver device 101 through the backhaul interface 109. Upon receiving the individual TWT frames 113, 1151, 1152, 1153, the intermediate transceiver device 107 may extract TWT parameters of the first transceiver device 101 and TWT parameters of each of the second transceiver devices 1051, 1052, 1053 from the respective individual TWT frames 113, 1151, 1152, 1153. Referring to FIG. 2c, TWT parameters of the second transceiver devices 1051, 1052, 1053 may indicate the intervals 1231, 1232, and 1233 of the TWT SPs 1211, 1212, and 1213, respectively. Further, the intermediate transceiver device 107 may determine presence of three second transceiver devices 1051, 1052, 1053 during the individual TWT negotiation. Thereafter, the intermediate transceiver device 107 may determine whether there are overlaps between TWT SPs 1211, 1212, 1213 of the three second transceiver devices 1051, 1052, 1053 indicated by the TWT parameters. Based on the determination that the TWT SPs 1211, 1212, 1213 are overlapped, the intermediate transceiver device 107 may align TWT SPs 1211, 1212, 1213 of the three second transceiver devices 1051, 1052, 1053 to determine two aligned TWT SPs 2051, 2053 for the first transceiver device 101, such that overlapped TWT SPs of three second transceiver devices 1051, 1052, 1053 can be accommodated in the aligned TWT SPs 2051, 2053 of the first transceiver device 101. Further, the intermediate transceiver device 107 may transmit a TWT frame including TWT parameters indicating the two aligned TWT SPs 2051, 2053 to the first transceiver device 101 through the backhaul interface 109. When it is determined that there is no overlap between the TWT SPs of the second transceiver devices 1051, 1052, 1053, the intermediate transceiver device 107 may directly transmit the TWT SP 1212 of the second transceiver device 1052 to the first transceiver device 101 through the backhaul interface 109. Based on the received TWT parameters indicating the aligned TWT SPs 2051, 2053 , the first transceiver device 101 may align and reschedule its TWT SPs, as illustrated in FIG. 2c. Consequently, latency for each of the three second transceiver devices 1051, 1052, 1053 may be reduced. In some implementations, the aforesaid mechanism can be applicable to the broadcast TWT negotiation process as well. Figures and explanation for the broadcast TWT negotiation are not reproduced herein to avoid redundancy. The examples and values thereof are for purposes of illustration only, and are not to be construed in a limiting sense.
FIG. 3 shows a block diagram of an intermediate transceiver device in accordance with some embodiments of the present disclosure.
In some implementations, the intermediate transceiver device 107 may include a first I/O interface 301, a second I/O interface 303, a processor 305, at least one transceiver antenna 307, and a memory 309. Here, the first I/O interface 301 may be a Wi-Fi interface, and may be communicatively coupled with the first transceiver device 101. Particularly, the first I/O interface 301 may be configured to receive the first TWT frame 113 from the first transceiver device 101 during a broadcast TWT negotiation or an individual TWT negotiation. Upon determination of the one or more aligned TWT parameters 203, the first I/O interface 301 may also be configured to send the one or more aligned TWT parameters 203 to the first transceiver device 101. Further, the second I/O interface 303 may be a hotspot interface, and may be communicatively coupled with the one or more one or more second transceiver devices 105. Particularly, the second I/O interface 303 may be configured to receive the one or more second TWT frames 115 from the one or more second transceiver devices 105 during the broadcast TWT negotiation or the individual TWT negotiation. The second I/O interface 303 may also be configured to send the one or more first TWT parameters of the first transceiver device 101 to the one or more second transceiver devices 105. Here, the first I/O interface 301, the second I/O interface 303 may be associated with the at least one transceiver antenna 307 for performing communication with the first transceiver device 101, and one or more second transceiver devices 105, respectively.
Further, the processor 305 may receive the first TWT frame 113 and the one or more second TWT frames 115 transmitted from the first transceiver device 101 and the one or more second transceiver devices 105, respectively, through the at least one transceiver antenna 307. Further, based on the received first TWT frame 113 and the one or more second TWT frames 115, the processor 305 may determine one or more aligned TWT parameters 203. The processor 305 may further synchronize the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203 for Wi-Fi sharing with the one or more second transceiver devices 105. To perform the aforesaid method steps, the processor 305 may utilize various modules 313 and memory 309 of the intermediate transceiver device 107.
In the intermediate transceiver device 107, the memory 309 may store data 311 received through the first I/O interface 301, the second I/O interface 303, the processor 305, and the modules 313. In one embodiment, the data 311 may include first TWT data 3111, second TWT data 3112, overlapping data 3113, synchronization data 3114, negotiation data 3115, and other data 3116. The first TWT data 3111 may include one or more first TWT parameters of the first transceiver device 101 extracted from the received first TWT frame 113. The second TWT data 3112 may include one or more second TWT parameters of the one or more second transceiver devices 105 extracted from the received one or more second TWT frames 115. The overlapping data 3113 may include data related to overlap between the one or more second TWT parameters of the at least two second transceiver devices. The synchronization data 3114 may include the one or more aligned TWT parameters 203. The negotiation data 3115 may include data related to broadcast TWT and individual TWT. The other data 3116 may store data, including temporary data and temporary files generated by the processor 305, and modules 313 for performing the various functions of the intermediate transceiver device 107.
In some embodiments, the data stored in the memory 309 may be processed by the modules 313 of the intermediate transceiver device 107. In an example, the modules 313 may be communicatively coupled to the processor 305 configured in the intermediate transceiver device 107. The modules 313 may be present outside the memory 309 as shown in FIG. 3 and implemented as separate hardware. As used herein, the term modules 313 may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
In some embodiments, the modules 313 may include, for example, a receiving module 315, a transmitting module 319, a determination module 321, a synchronization module 323, and other modules 325. The other modules 325 may be used to perform various miscellaneous functionalities of the intermediate transceiver device 107. In some embodiments, aforementioned modules 313 may be represented as a single module or a combination of different modules. In some embodiments,, the one or more modules 313 may be stored in the memory 309, without limiting the scope of the disclosure. The said modules 313 when configured with the functionality defined in the present disclosure will result in a novel hardware.
In an embodiment, the receiving module 315 may receive the first TWT frame 113 from the first transceiver device 101 through the first I/O interface 301. Further, the receiving module 315 may receive one or more second TWT frames 115 from the one or more second transceiver devices 105 through the second I/O interface 303. Further, the receiving module 315 may send the first TWT frame 113, and the one or more second TWT frames 115 to the determination module 321 for further processing.
As an example, a first smartphone may share data connectivity from a Wi-Fi router to a laptop and a second smartphone. Here, the first smartphone may have a Wi-Fi interface and a hotspot interface enabled. The first smartphone may be connected to a Wi-Fi router through the Wi-Fi interface. Further, the laptop and the second smartphone may be connected to the first smartphone through the hotspot interface. To avail the Wi-Fi connectivity through the hotspot interface, the laptop and the second smartphone may initiate individual TWT negotiation and may send the respective second TWT frames 115 to the first smartphone. The receiving module 315 of the first smartphone may receive the second TWT frames 115 from the laptop and the second smartphone through the hotspot interface. Further, the Wi-Fi router may send the first TWT frame 113 to the first smartphone. The receiving module 315 of the first smartphone may receive the first TWT frame 113 from the Wi-Fi router through the Wi-Fi interface. Further, the receiving module 315 of the first smartphone may send the received first TWT frame 113, and the second TWT frames 115 to the determination module 321 of the first smartphone.
In an embodiment, the receiving module 315 may receive the first TWT frame 113 and the one or more second TWT frames 115 during a broadcast TWT negotiation or an individual TWT negotiation. The individual TWT negotiation may be initiated by the one or more second transceiver devices 105 connected to the second I/O interface 303, and the broadcast TWT negotiation may be initiated by the first transceiver device 101 connected to the first I/O interface 301. During the broadcast TWT negotiation, the first transceiver device 101 may send the first TWT parameters in a beacon frame or other management frames using a TWT element (herein referred as the first TWT frame 113) to the intermediate transceiver device 107. The TWT element may comprise an element ID field, a length field, a control field, a request type field, a TWT field, a nominal minimum TWT wake duration field, a TWT wake interval mantissa field, and a broadcast TWT information field. To identify whether the received first TWT frame 113 is associated with the broadcast TWT negotiation or the individual TWT negotiation, the receiving module 315 may comprise an identification module 317. Upon receiving the first TWT frame 113 from the first transceiver device 101 through the first I/O interface 301, the identification module 317 may verify the control field of the TWT element to identify whether the received first TWT frame 113 pertains to the broadcast TWT negotiation or individual TWT negotiation. If it is identified that the received first TWT frame 113 pertains to the broadcast TWT negotiation, the identification module 317 may send the received first TWT frame 113 to the transmitting module 319 for further processing.
In an embodiment, the transmitting module 319 may receive the first TWT frame 113 associated with the broadcast TWT negotiation from the receiving module 315. Further, the transmitting module 319 may transmit the first TWT frame 113 to the one or more second transceiver devices 105 supporting the broadcast TWT negotiation through the second I/O interface 303.
In an embodiment, the determination module 321 may determine one or more aligned TWT parameters 203 based on the received first TWT frame 113 and the one or more second TWT frames 115. Particularly, the determination module 321 may receive the first TWT frame 113 and the one or more second TWT frames 115 from the receiving module 315. The determination module 321 may extract one or more first TWT parameters of the first transceiver device 101 from the first TWT frame 113, and one or more second TWT parameters of the one or more second transceiver devices 105 from the one or more second TWT frames 115. Each of, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a TWT Service Period (SP), a TWT minimum wakeup time, and a Target Beacon Transmission Time (TBTT). Further, the determination module 321 may determine whether at least two second transceiver devices are present in the one or more second transceiver devices 105. In other words, the determination module 321 may determine number of second transceiver devices connected to the second I/O interface 303 to avail Wi-Fi connectivity. When it is determined that at least two second transceiver devices are connected, the determination module 321 may determine whether there is an overlap between the one or more second TWT parameters of the at least two second transceiver devices. Further, the determination module 321 may determine the one or more aligned TWT parameters 203 based on the one or more first TWT parameters and the one or more overlapping second TWT parameters. The determination module 321 may send the determined one or more aligned TWT parameters 203 to the synchronization module 323.
In the example, in the first smartphone, the determination module 321 may receive the first TWT frame 113 including TWT parameters indicating that the target wake time of the Wi-Fi router is equal to t3 and the duration of the TWT SP of the Wi-Fi router is equal to 20ms, from the receiving module 315. In the example, in the first smartphone, the determination module 321 may receive the second TWT frames 115 including TWT parameters indicating that the target wake times of the laptop and the second smartphone are equal to t1, and t2, and the duration of the TWT SPs of the laptop and the second smartphone are 20ms, from the receiving module 315. Further, the determination module 321 may extract TWT parameters indicating the duration of the TWT SPs and the target wake times of the Wi-Fi router, the laptop and the second smartphone. Based on the extracted TWT parameters, the determination module 321 may determine the target wake times of the laptop, the second smartphone and the Wi-Fi router to be t1, t2, and t3, respectively. Further, based on the extracted TWT parameters, the determination module 321 may determine the duration of the TWT SPs of each of the laptop, the second smartphone and the Wi-Fi router to 20 ms. Further, the determination module 321 may determine that two second transceiver devices are connected to the hotspot interface of the first smartphone. Further, the determination module 321 may determine whether the TWT SPs of the laptop and the second smartphone overlap with each other. The determination module 321 may determine that there is the overlap between the TWT SP of the laptop and the TWT SP of the second smartphone by determining relationship between the target wake times of the laptop and the second smartphone, for example, when the following mathematical expression is satisfied:
t1 < t2 < t1 + 20.
Based on this, the determination module 321 may determine that the TWT SP of the second smartphone overlaps with the TWT SP of the laptop. Further, assume that:
t1 < t2 < t3 , and
t2 = t1 + 10.
Based on this, the determination module 321 may determine the target wake time and the duration of the aligned TWT SP for the Wi-Fi router to be t1 and 30 ms, respectively, such that both the overlapped TWT SPs of the laptop and the second smartphone can be accommodated in single aligned TWT SP of the Wi-Fi router. Thus, the determination module 321 may adaptively extend the duration of the aligned TWT SP from the initial value of 20 ms to 30 ms, and may adaptively shift the target wake time of the aligned TWT SP from the initial value of t3 to t1.
In an alternative embodiment, the determination module 321 may determine that only one second transceiver device is connected to the intermediate transceiver device 107 or there is no overlap between the one or more second TWT parameters of the at least two second transceiver devices. Based on this, the determination module 321 may send the extracted one or more second TWT parameters to the synchronization module 323. As an example, when the laptop and the second smartphone are communicatively connected to the first smartphone, the determination module 321 may determine that:
t1 + 20 < t2.
Based on this, the determination module 321 of the first smartphone may determine that the TWT SPs of the laptop and the second smartphone do not overlap with each other. Accordingly, the determination module 321 may send, to the synchronization module 323, TWT parameters indicating that the target wake times and the duration of the TWT SPs of the laptop and the second smartphone are t1, t2, and 20 ms, respectively.
In an embodiment, the synchronization module 323 may synchronize the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203 for Wi-Fi sharing with the one or more second transceiver devices 105. Particularly, the synchronization module 323 may receive the one or more aligned TWT parameters 203 from the determination module 321, and may transmit the one or more aligned TWT parameters 203 to the first transceiver device 101 through the first I/O interface 301. The one or more aligned TWT parameters 203 may be transmitted for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203. In the example, the synchronization module 323 of the first smartphone may transmit, to the Wi-Fi router, a TWT frame including TWT parameter information indicating the duration of the aligned TWT SP is equal to 30 ms and the target wake time of the aligned TWT SP is equal to t1. Based on the received TWT parameter information, the Wi-Fi router may wake only once at a target wake time t1 for a duration of 30 ms.
In an alternative embodiment, the synchronization module 323 may receive the one or more second TWT parameters from the determination module 321. The synchronization module 323 may transmit the one or more second TWT parameters to the first transceiver device 101 through the first I/O interface 301 when it is determined that only one second transceiver device is connected to the intermediate transceiver device 107 or there is no overlap between the one or more second TWT parameters of the at least two second transceiver devices. As an example, when the laptop and the second smartphone are communicatively connected to the first smartphone and there is no overlap between the one or more second TWT parameters of the laptop and the second smartphone, the synchronization module 323 of the first smartphone may transmit, to the Wi-Fi router, a TWT frame including TWT parameter information indicating that the target wake times of the laptop and the second smartphone are equal to t1, and t2, and the duration of the TWT SPs of the laptop and the second smartphone is equal to 20 ms. Accordingly, the Wi-Fi router may wake twice. Particularly, the Wi-Fi router may firstly wake at t1 for a duration of 20 ms, and secondly wake at t2 for a duration of 20 ms.
FIG. 4 shows a flow chart illustrating a method of synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing in accordance with some embodiments of the present disclosure.
As illustrated in FIG. 4, the method 400 includes one or more blocks illustrating a method of synchronizing a first transceiver device 101 and one or more second transceiver devices 105 for Wi-Fi sharing. The order in which the method 400 is described is not intended to be construed as a limitation, and any number of the described method blocks can be combined in any order to implement the method. Additionally, individual blocks may be deleted from the methods without departing from the scope of the subject matter described herein. Furthermore, the method can be implemented in any suitable hardware, software, firmware, or combination thereof.
At block 401, the method may include receiving, by an intermediate transceiver device 107, a first Target Wake-up Time (TWT) frame from the first transceiver device 101 and one or more second TWT frames 115 from the one or more second transceiver devices 105 over a wireless network 201. Here, the intermediate transceiver device 107 may be communicatively coupled between the first transceiver device 101 and the one or more second transceiver devices 105. The first TWT frame 113 and the one or more second TWT frames 115 may be received during a broadcast TWT negotiation or an individual TWT negotiation. The broadcast TWT negotiation may be initiated by the first transceiver device 101. The individual TWT negotiation may be initiated by one of the one or more second transceiver devices 105.
At block 403, the method may include determining, by the intermediate transceiver device 107, one or more aligned TWT parameters 203 based on the received first TWT frame 113 and the one or more second TWT frames 115. Particularly, one or more first TWT parameters of the first transceiver device 101 may be extracted from the first TWT frame 113. Also, one or more second TWT parameters of the one or more second transceiver devices 105 may be extracted from the one or more second TWT frames 115. Further, presence of at least two second transceiver devices in the one or more second transceiver devices 105 may be determined. Thereafter, an overlap between the one or more second TWT parameters of the at least two second transceiver devices may be determined. Based on the one or more first TWT parameters and the one or more overlapping second TWT parameters, the one or more aligned TWT parameters 203 may be determined. Here, each of, the one or more aligned TWT parameters 203, the one or more first TWT parameters, and the one or more second TWT parameters may comprise a target wake time, a nominal minimum TWT wake duration, a TWT wake interval and a Target Beacon Transmission Time (TBTT).
At block 405, the method may include synchronizing, by the intermediate transceiver device 107, the first transceiver device 101 and the one or more second transceiver devices 105 based on the one or more aligned TWT parameters 203. The synchronization may be performed for Wi-Fi sharing by the intermediate transceiver device 107 with the one or more second transceiver devices 105. Particularly, the one or more aligned TWT parameters 203 may be transmitted to the first transceiver device 101 for aligning the one or more first TWT parameters of the first transceiver device 101 with the one or more aligned TWT parameters 203. Alternatively, the one or more second TWT parameters may be transmitted to the first transceiver device 101 for aligning the one or more first TWT parameters with the one or more second TWT parameters. The one or more second TWT parameters may be transmitted, specifically upon determining presence of one second transceiver device in the one or more second transceiver devices 105, or determining no overlap between the one or more second TWT parameters of the at least two second transceiver devices.
Computer System
FIG. 5 illustrates a block diagram of an exemplary computer system 500 for implementing embodiments consistent with the present disclosure. In an embodiment, the computer system 500 may be a system for synchronizing a first transceiver device 101 and one or more second transceiver devices 105 for Wi-Fi sharing. The computer system 500 may include a central processing unit ("CPU" or "processor") 502. The processor 502 may comprise at least one data processor for executing program components for executing user or system-generated business processes. The processor 502 may include specialized processing units such as integrated system (bus) controllers, memory management control units, floating point units, graphics processing units, digital signal processing units, etc.
The processor 502 may be disposed in communication with one or more input/output (I/O) devices (511 and 512) via I/O interface 501. The I/O interface 501 may employ communication protocols/methods such as, without limitation, audio, analog, digital, stereo, IEEE-1394, serial bus, Universal Serial Bus (USB), infrared, PS/2, BNC, coaxial, component, composite, Digital Visual Interface (DVI), high-definition multimedia interface (HDMI), Radio Frequency (RF) antennas, S-Video, Video Graphics Array (VGA), IEEE 802.n /b/g/n/x, Bluetooth, cellular (e.g., Code-Division Multiple Access (CDMA), High-Speed Packet Access (HSPA+), Global System For Mobile Communications (GSM), Long-Term Evolution (LTE) or the like), etc. Using the I/O interface 501, the computer system 500 may communicate with one or more I/ O devices 511 and 512.
In some embodiments, the processor 502 may be disposed in communication with a wireless communication network 201 via a network interface 503. The network interface 503 may communicate with the wireless communication network 201. The network interface 503 may employ connection protocols including, without limitation, direct connect, Ethernet (e.g., twisted pair 10/100/1000 Base T), Transmission Control Protocol/Internet Protocol (TCP/IP), token ring, IEEE 802.11a/b/g/n/x, etc.
The wireless communication network 201 can be implemented as one of the several types of networks, such as intranet or Local Area Network (LAN) and such within the organization. The wireless communication network 201 may either be a dedicated network or a shared network, which represents an association of several types of networks that use a variety of protocols, for example, Hypertext Transfer Protocol (HTTP), Transmission Control Protocol/Internet Protocol (TCP/IP), Wireless Application Protocol (WAP), etc., to communicate with each other. Further, the communication network 201 may include a variety of network devices, including routers, bridges, servers, computing devices, storage devices, etc.
In some embodiments, the processor 502 may be disposed in communication with a memory 505 (e.g., RAM 513, ROM 514, etc. as shown in FIG. 5) via a storage interface 504. The storage interface 504 may connect to memory 505 including, without limitation, memory drives, removable disc drives, etc., employing connection protocols such as Serial Advanced Technology Attachment (SATA), Integrated Drive Electronics (IDE), IEEE-1394, Universal Serial Bus (USB), fiber channel, Small Computer Systems Interface (SCSI), etc. The memory drives may further include a drum, magnetic disc drive, magneto-optical drive, optical drive, Redundant Array of Independent Discs (RAID), solid-state memory devices, solid-state drives, etc.
The memory 505 may store a collection of program or database components, including, without limitation, user /application 506, an operating system 507, a web browser 508, mail client 515, mail server 516, web server 517 and the like. In some embodiments, computer system 500 may store user /application data 506, such as the data, variables, records, etc. as described in this disclosure. Such databases may be implemented as fault-tolerant, relational, scalable, secure databases such as OracleR or SybaseR.
The operating system 507 may facilitate resource management and operation of the computer system 500. Examples of operating systems include, without limitation, APPLE MACINTOSHR OS X, UNIXR, UNIX-like system distributions (E.G., BERKELEY SOFTWARE DISTRIBUTIONTM (BSD), FREEBSDTM, NETBSDTM, OPENBSDTM, etc.), LINUX DISTRIBUTIONSTM (E.G., RED HATTM, UBUNTUTM, KUBUNTUTM, etc.), IBMTM OS/2, MICROSOFTTM WINDOWSTM (XPTM, VISTATM/7/8, 10 etc.), APPLER IOSTM, GOOGLER ANDROIDTM, BLACKBERRYR OS, or the like. A user interface may facilitate display, execution, interaction, manipulation, or operation of program components through textual or graphical facilities. For example, user interfaces may provide computer interaction interface elements on a display system operatively connected to the computer system 500, such as cursors, icons, check boxes, menus, windows, widgets, etc. Graphical User Interfaces (GUIs) may be employed, including, without limitation, APPLE MACINTOSHR operating systems, IBMTM OS/2, MICROSOFTTM WINDOWSTM (XPTM, VISTATM/7/8, 10 etc.), UnixR X-Windows, web interface libraries (e.g., AJAXTM, DHTMLTM, ADOBE® FLASHTM, JAVASCRIPTTM, JAVATM, etc.), or the like.
Furthermore, one or more computer-readable storage media may be utilized in implementing embodiments consistent with the present disclosure. A computer-readable storage medium refers to any type of physical memory on which information or data readable by a processor may be stored. Thus, a computer-readable storage medium may store instructions for execution by one or more processors, including instructions for causing the processor(s) to perform steps or stages consistent with the embodiments described herein. The term "computer-readable medium" should be understood to include tangible items and exclude carrier waves and transient signals, i.e., non-transitory. Examples include Random Access Memory (RAM), Read-Only Memory (ROM), volatile memory, nonvolatile memory, hard drives, Compact Disc (CD) ROMs, Digital Video Disc (DVDs), flash drives, disks, and any other known physical storage media.
In an embodiment, the present disclosure provides a method, an intermediate transceiver device and a system for synchronizing a first transceiver device and one or more second transceiver devices for Wi-Fi sharing.
In an embodiment, the present disclosure provides a method for aligning one or more first TWT parameters of the first transceiver device with one or more aligned TWT parameters or one or more second TWT parameters, which improves synchronization between the first transceiver device and one or more second transceiver devices.
In an embodiment, the present disclosure reduces contention in a communication medium and a latency on each of the one or more second transceiver devices during Wi-Fi sharing due to the improved synchronization.
In an embodiment, the present disclosure reduces requirement of retransmission of Quality-of-Service (QoS) data frames and acknowledgment frames due to the reduced contention, thereby improving bandwidth utilization.
In an embodiment, the present disclosure reduces power consumption at a backhaul interface and a fronthaul interface of the intermediate transceiver device due to the improved synchronization.
In an embodiment, the present disclosure improves power efficiency of a battery-operated intermediate transceiver device due to the reduced power consumption at the backhaul interface and the fronthaul interface.
The terms "an embodiment", "embodiment", "embodiments", "the embodiment", "the embodiments", "one or more embodiments", "some embodiments", and "one embodiment" mean "one or more (but not all) embodiments of the disclosure(s)" unless expressly specified otherwise.
The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless expressly specified otherwise. The enumerated listing of items does not imply that any or all the items are mutually exclusive, unless expressly specified otherwise.
The terms "a", "an" and "the" mean "one or more", unless expressly specified otherwise.
A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the disclosure.
When a single device or article is described herein, it will be clear that more than one device/article (whether they cooperate) may be used in place of a single device/article. Similarly, where more than one device or article is described herein (whether they cooperate), it will be clear that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the disclosure need not include the device itself. 
Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the disclosure be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present disclosure are intended to be illustrative, but not limiting, of the scope of the disclosure, which is set forth in the following claims.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Claims (15)

  1. A method of synchronizing a first transceiver device and one or more second transceiver devices, the method comprising:
    receiving, by an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices, a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network;
    determining, by the intermediate transceiver device, one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames; and
    synchronizing, by the intermediate transceiver device, the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters with the one or more second transceiver devices.
  2. The method as claimed in claim 1, wherein determining the one or more aligned TWT parameters comprises:
    extracting, by the intermediate transceiver device, one or more first TWT parameters of the first transceiver device from the first TWT frame, and one or more second TWT parameters of the one or more second transceiver devices from the one or more second TWT frames;
    determining, by the intermediate transceiver device, presence of at least two second transceiver devices in the one or more second transceiver devices;
    determining, by the intermediate transceiver device, an overlap between TWT service periods indicated by the one or more second TWT parameters of the at least two second transceiver devices; and
    determining, by the intermediate transceiver device, the one or more aligned TWT parameters based on the one or more first TWT parameters and the one or more second TWT parameters having the overlap.
  3. The method as claimed in claim 2, wherein each of, the one or more aligned TWT parameters, the one or more first TWT parameters, and the one or more second TWT parameters comprise a target wake time, a nominal minimum TWT wake duration, and a TWT wake interval.
  4. The method as claimed in claim 2, wherein synchronizing comprises transmitting, by the intermediate transceiver device, the one or more aligned TWT parameters to the first transceiver device for aligning the one or more first TWT parameters of the first transceiver device with the one or more aligned TWT parameters.
  5. The method as claimed in claim 2, wherein synchronizing comprises transmitting, by the intermediate transceiver device, the one or more second TWT parameters to the first transceiver device for aligning the one or more first TWT parameters with the one or more second TWT parameters upon determining one of, presence of one second transceiver device in the one or more second transceiver devices and determining no overlap between TWT service periods indicated by the one or more second TWT parameters of the at least two second transceiver devices.
  6. The method as claimed in claim 1, wherein the first TWT frame and the one or more second TWT frames are received during a broadcast TWT negotiation or an individual TWT negotiation, wherein the broadcast TWT negotiation is initiated by the first transceiver device and the individual TWT negotiation is initiated by one of the one or more second transceiver devices.
  7. An intermediate transceiver device for synchronizing a first transceiver device and one or more second transceiver devices, the intermediate transceiver device comprising:
    a processor; and
    a memory communicatively coupled to the processor 305, wherein the memory stores processor-executable instructions, which, on execution, causes the processor to:
    receive a first Target Wake-up Time (TWT) frame from the first transceiver device and one or more second TWT frames from the one or more second transceiver devices over a wireless network, wherein the intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices;
    determine one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames; and
    synchronize the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters with the one or more second transceiver devices.
  8. The intermediate transceiver device as claimed in claim 7, wherein the processor 305 is configured to:
    extract one or more first TWT parameters of the first transceiver device from the first TWT frame, and one or more second TWT parameters of the one or more second transceiver devices from the one or more second TWT frames;
    determine presence of at least two second transceiver devices in the one or more second transceiver devices;
    determine an overlap between the one or more second TWT parameters of the at least two second transceiver devices; and
    determine the one or more aligned TWT parameters based on the one or more first TWT parameters and the one or more overlapping second TWT parameters.
  9. The intermediate transceiver device as claimed in claim 8, wherein each of, the one or more aligned TWT parameters, the one or more first TWT parameters, and the one or more second TWT parameters comprise a target wake time, a nominal minimum TWT wake duration, and a TWT wake interval.
  10. The intermediate transceiver device as claimed in claim 8, wherein the processor is configured to transmit the one or more aligned TWT parameters to the first transceiver device for aligning the one or more first TWT parameters of the first transceiver device with the one or more aligned TWT parameters.
  11. The intermediate transceiver device as claimed in claim 8, wherein the processor is configured to transmit the one or more second TWT parameters to the first transceiver device for aligning the one or more first TWT parameters with the one or more second TWT parameters upon determining one of, presence of one second transceiver device in the one or more second transceiver devices and determining no overlap between TWT service periods indicated by the one or more second TWT parameters of the at least two second transceiver devices.
  12. The intermediate transceiver device as claimed in claim 7, wherein the first TWT frame 113 and the one or more second TWT frames are received during one of a broadcast TWT negotiation and an individual TWT negotiation, wherein the broadcast TWT negotiation is initiated by the first transceiver device and the individual TWT negotiation is initiated by one of the one or more second transceiver devices.
  13. A system for synchronizing a first transceiver device and one or more second transceiver devices, the system comprising:
    the first transceiver device configured to transmit a first Target Wake-up Time (TWT) frame;
    the one or more second transceiver devices configured to transmit one or more second TWT frames;
    an intermediate transceiver device communicatively coupled between the first transceiver device and the one or more second transceiver devices, wherein the intermediate transceiver device is configured to:
    receive first Target Wake-up Time (TWT) frame from the first transceiver device and the one or more second TWT frames from the one or more second transceiver devices over a wireless network;
    determine one or more aligned TWT parameters based on the received first TWT frame and the one or more second TWT frames; and
    synchronize the first transceiver device and the one or more second transceiver devices based on the one or more aligned TWT parameters with the one or more second transceiver devices.
  14. The system as claimed in claim 13, wherein the intermediate transceiver device is configured to:
    extract one or more first TWT parameters of the first transceiver device from the first TWT frame, and one or more second TWT parameters of the one or more second transceiver devices from the one or more second TWT frames;
    determine presence of at least two second transceiver devices in the one or more second transceiver devices;
    determine an overlap between TWT service periods indicated by the one or more second TWT parameters of the at least two second transceiver devices; and
    determine the one or more aligned TWT parameters based on the one or more first TWT parameters and the one or more overlapping second TWT parameters.
  15. The system as claimed in claim 14, wherein each of, the one or more aligned TWT parameters, the one or more first TWT parameters, and the one or more second TWT parameters comprise a target wake time, a nominal minimum TWT wake duration, and a TWT wake interval.
PCT/KR2022/003445 2022-02-09 2022-03-11 Method of synchronizing transceiver devices for wi-fi sharing, intermediate transceiver device and system thereof WO2023153552A1 (en)

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US20150036670A1 (en) * 2013-04-05 2015-02-05 Minyoung Park METHOD OF EFFICIENCY IMPROVEMENT FOR CONTROL FRAMES IN 802.11ah
US20170353921A1 (en) * 2016-06-06 2017-12-07 Apple Inc. Software-enabled access point with power saving
WO2020040587A1 (en) * 2018-08-23 2020-02-27 엘지전자 주식회사 Method and device for transmitting or receiving information about links in wireless lan system
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