WO2016061725A1 - Procédé de communication bidirectionnelle simultanée sans fil, dispositif, station et point d'accès - Google Patents

Procédé de communication bidirectionnelle simultanée sans fil, dispositif, station et point d'accès Download PDF

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Publication number
WO2016061725A1
WO2016061725A1 PCT/CN2014/088907 CN2014088907W WO2016061725A1 WO 2016061725 A1 WO2016061725 A1 WO 2016061725A1 CN 2014088907 W CN2014088907 W CN 2014088907W WO 2016061725 A1 WO2016061725 A1 WO 2016061725A1
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Prior art keywords
transmission
performance gain
full
station
duplex link
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PCT/CN2014/088907
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English (en)
Chinese (zh)
Inventor
李波
关巧艳
李云波
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华为技术有限公司
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Priority to PCT/CN2014/088907 priority Critical patent/WO2016061725A1/fr
Publication of WO2016061725A1 publication Critical patent/WO2016061725A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a station, and an access point for wireless full duplex communication.
  • Full-duplex communication means that the device can receive data when transmitting data.
  • CCFD International: Co-time Co-frequency full duplex
  • Chinese simultaneous full-duplex
  • the full-duplex approach which theoretically doubles the system's spectrum utilization and throughput.
  • the device-initiated transmission that first obtains the medium access right is generally referred to as the first transmission
  • the first-transmitted sender that is initiated after the first transmission starts and is concurrent with the first transmission.
  • the communication in which the receiver participates is referred to as a second transmission, and the first transmission and the second transmission together form a full duplex link.
  • the first-transmitted receiver is determined as the sender of the second transmission, for example, full-duplex in a Wi-Fi (English: Wireless Fidelity) system.
  • a scenario in which a link is formed is that a STA (English: Station, Chinese: site) initiates the first transmission, and sends data to the AP (English: Access Point, Chinese: access point). After the first transmission starts, the AP starts.
  • the AP Determining, by the other STAs, the receiver of the second transmission, the AP transmitting the second transmitted data to the second transmitting receiver while receiving the first transmitted data; the AP determining the second sending receiver is: the AP maintaining the record a weight list of STAs that may become the second transmitting receiver, the weight of the STA indicating that in a full-duplex link having a specific first transmission combination from the first transmitting sender to the first transmitting receiver, When the STA is the second transmission success rate of the second transmission receiver, the AP selects the second transmission receiver according to the weight of the STA that may become the second transmission receiver in the list, and the greater the weight, the second transmission receiver access two The higher the priority of the transmission; after the AP determines the STA of the second transmitting receiver, it transmits data to the second transmitting and receiving STA while receiving the data transmitted by the first transmitting sender STA.
  • Embodiments of the present invention provide a method, an apparatus, a station, and an access point for wireless full-duplex communication, which can solve the problem that the second transmission succeeds when the station is in the same scenario as the second transmission receiver in the full-duplex communication process.
  • the ratio determines its priority as the second transmitting receiver, resulting in low throughput during communication and low system spectrum utilization.
  • an embodiment of the present invention provides a method for wireless full duplex communication, including:
  • the performance gain is greater than a preset gain threshold, entering a backoff state, wherein the performance gain is negatively related to a backoff duration or a backoff window, the backoff duration or the backoff window is used to indicate that the current site enters a backoff The length of the state;
  • the current station does not detect that the other station accesses the second transmission before the end of the backoff period or the end of the backoff window, when the backoff duration or the backoff window ends, accessing the second send.
  • the method before the estimating the performance gain of the second station after the current station accesses the full duplex link, the method further includes:
  • the performance gain after estimating that the current site accesses the full duplex link includes:
  • the performance gain is estimated from the p a and the p b .
  • the estimating the performance gain according to the p a and the p b includes:
  • the performance gain is calculated, where G represents the performance gain.
  • the method before the estimating a performance gain of the second station after the current station accesses the full duplex link, the method also includes:
  • the estimated performance gain after the second transmission in the current station access full-duplex link includes:
  • the performance gain is estimated from the p a , the p b , and the p c .
  • the method further includes:
  • the estimating the performance gain according to the p a , the p b , and the p c includes:
  • the estimating the performance gain according to the p a , the p b , and the p c includes:
  • the method further includes:
  • the estimating the performance gain according to the p a , the p b , and the p c includes:
  • the third power threshold is preset, and the third power threshold is greater than the second power threshold ;
  • the estimating the performance gain according to the p a , the p b , and the p c includes:
  • the estimating the performance gain according to the p a , the p b , and the p c includes:
  • the p a request is acquired by the current RTS transmitting station by listening to the sender of transmission of the first transmission
  • the p a is preset for the current site
  • the p b is acquired by the current station by listening to the permission to send CTS sent by the receiver of the first transmission, or the p b is preset for the current site.
  • the p c is obtained by the current site from the indication information sent by the first sending receiver,
  • the indication information is sent by the first transmitted receiver or by the allowed CTS.
  • the estimating a performance gain after the second transmission in the current station accessing the full-duplex link includes:
  • the historical information is a performance gain after the second transmission in the current station access history full-duplex link before the current time
  • the history of the full-duplex link a transmitting sender is the same as the first transmitting sender of the full-duplex link
  • the first transmitting receiver of the historical full-duplex link is the same as the first transmitting receiver of the full-duplex link .
  • the performance gain of the current station after accessing the second full transmission in the historical full duplex link is The first transmission rate and the second transmission rate of the historical full duplex link are determined.
  • an embodiment of the present invention provides a method for wireless full duplex communication, including:
  • a station corresponding to a maximum value of the performance gains is accessed to the second transmission.
  • the determining, after the second transmission, the performance gain of the second transmission in each of the other stations except the first transmission includes:
  • the remaining each station except the first transmission includes accessing the historical full duplex link
  • the performance gain after the second transmission is determined according to the first transmission rate and the second transmission rate of the historical full duplex link.
  • an apparatus for wireless full duplex communication including:
  • An estimating unit configured to estimate a performance gain after the second transmission in the current station accessing the full-duplex link, where the full-duplex link includes the first sending and the second sending, the first sending and the The second transmission is performed simultaneously at the same frequency;
  • a backoff unit configured to enter a backoff state when the performance gain is greater than a preset gain threshold, wherein the performance gain is negatively correlated with a backoff duration or a backoff window, the backoff duration or the The backoff window is used to indicate the duration of the current site entering the backoff state;
  • An access unit configured to: when the current station does not detect that the other station accesses the second transmission before the end of the backoff period or the end of the backoff window, when the backoff duration or the backoff window ends, Accessing the second transmission.
  • the device further includes:
  • An acquiring unit configured to acquire, by the current station, a received power pa of a frame sent by the first sending sender
  • the acquiring unit is further configured to acquire, by the current station, a received power p b of a frame sent by the first sending receiver;
  • the estimating unit is specifically configured to estimate the performance gain according to the p a and the p b .
  • the estimating unit is specifically used according to a formula The performance gain is calculated, where G represents the performance gain.
  • the acquiring unit is further configured to acquire, by the receiver that the first sending, the sender that sends the first sending Received power of the transmitted frame p c ;
  • the estimating unit is further configured to estimate the performance gain according to the p a , the p b , and the p c .
  • the device further includes:
  • a first determining unit configured to determine whether the p c is greater than a first power threshold, where the first power threshold is preset;
  • the estimating unit is specifically used according to a formula Calculating the performance gain, where G represents the performance gain;
  • the estimating unit is specifically used according to a formula Calculate the performance gain.
  • the device further includes:
  • a second determining unit configured to determine whether the p c is smaller than a second power threshold, where the second power threshold is preset;
  • the estimating unit is specifically used according to a formula Calculating the performance gain, where G represents the performance gain;
  • the second determining unit is further configured to determine whether the p c is greater than a third power threshold, where the third power threshold is preset, and the third The power threshold is greater than the second power threshold;
  • the estimating unit is specifically used according to a formula Calculating the performance gain
  • the estimating unit is specifically used according to a formula Calculate the performance gain.
  • the p a station monitor by the current through the first transmission request RTS Get Or, the p a is preset for the current site;
  • the pb is acquired by the current station by listening to the allowable sending CTS sent by the first sending receiver, or the p b is preset for the current station.
  • the p c is obtained by the current station from the indication information sent by the first sending receiver,
  • the indication information is carried by the CTS.
  • the estimating unit is further configured to estimate the performance gain according to the historical information, where the current information is before the current time, the current station accesses Performance gain after the second transmission in the historical full-duplex link, the first transmitting sender of the historical full-duplex link is the same as the first transmitting sender of the full-duplex link, and the history is all The first transmitting receiver of the duplex link is the same as the first transmitting receiver of the full duplex link.
  • the performance gain of the current station after accessing the second full transmission in the historical full duplex link is The first transmission rate and the second transmission rate of the historical full duplex link are determined.
  • an embodiment of the present invention provides a device for wireless full duplex communication, including:
  • a determining unit configured to determine a performance gain after the second transmission in each of the remaining stations connected to the full duplex link except the first transmission included, the full duplex link including the first sending and the The second sending, the first sending and the second sending are simultaneously performed at the same frequency;
  • the determining unit is further configured to determine a maximum value of performance gains after the second transmission in the full duplex link of each of the remaining stations except the first transmission included station;
  • an access unit configured to: when a maximum value of the performance gains is greater than a preset gain threshold, access a station corresponding to a maximum value of the performance gains to the second transmission.
  • the determining unit is specifically configured to determine, according to the historical information, each of the remaining stations except the first transmission to access the full duplex link a performance gain after the second transmission, where the historical information is a performance gain after the second transmission in the full-duplex link of each of the stations except the first transmission site before the current time.
  • the first transmitting sender of the historical full-duplex link is the same as the first sending sender of the full-duplex link, and the first transmitting receiver of the historical full-duplex link and the full double The first sender of the worker link is the same.
  • the remaining each station except the first transmission includes accessing the historical full duplex link
  • the performance gain after the second transmission is determined according to the first transmission rate and the second transmission rate of the historical full duplex link.
  • an embodiment of the present invention provides a station for wireless full duplex communication, including:
  • a processor configured to estimate a performance gain of the second transmission after the current station accesses the full-duplex link, where the full-duplex link includes the first transmission and the second transmission, the first transmission and the The second transmission is performed at the same time; and is configured to enter a back-off state when the performance gain is greater than a preset gain threshold, wherein the performance gain is negatively correlated with the back-off duration or the back-off window, and the back-off duration or The backoff window is used to indicate the duration of the current site entering the backoff state; and is configured to detect that the current station does not detect other stations before the backoff duration or the end of the backoff window The point accesses the second transmission, and when the backoff duration or the backoff window ends, the second transmission is accessed.
  • the processing unit is further configured to acquire, by the current station, a received power p a of a frame sent by the first sending sender; and configured to obtain said current received power p b station receiving the frame transmitted by the first transmission recipient; and for estimating the performance gain according to the p a and p b.
  • the processor is further configured to The performance gain is calculated, where G represents the performance gain.
  • the processor is further configured to acquire, by the receiver that the first sending, the sender of the first sending The received power p c of the transmitted frame; and, for estimating the performance gain from the p a , the p b , and the p c .
  • the processor is further configured to determine whether the p c is greater than a first power threshold, the first power threshold And pre-set; and, when the p c is greater than the first power threshold, the estimating the performance gain according to the p a , the p b, and the p c includes: according to a formula Calculating the performance gain, wherein G represents the performance gain; and, for when the p c is not greater than the first power threshold, the according to the p a , the p b , and the p c estimating the performance gains including: according to the formula Calculate the performance gain.
  • the processor is further configured to determine whether the p c is less than a second power threshold, the second power threshold And pre-set; and, when the p c is smaller than the second power threshold, the estimating the performance gain according to the p a , the p b, and the p c includes: according to a formula Calculating the performance gain, where G represents the performance gain; and, for determining whether the p c is greater than a third power threshold when the p c is not less than the second power threshold, the third The power threshold is preset, the third power threshold is greater than the second power threshold; and, when the p c is greater than the third power threshold, the according to the p a , the p b Estimating the performance gain with the p c includes: according to a formula Calculating the performance gain; and, when the p c is not greater than the third power threshold, the estimating the performance gain according to the
  • Transmitting party transmits the first possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the p a current from said first station by listening to the acquired transmission request RTS Or, the p a is preset for the current site;
  • the p b is acquired by the current station by listening to the permission to send CTS sent by the receiver of the first transmission, or the p b is preset for the current site.
  • the p c is obtained by the current station from the indication information sent by the first sending receiver,
  • the indication information is carried by the CTS.
  • the processor is further configured to estimate the performance gain according to the historical information, where the current information is before the current time, the current site access Performance gain after the second transmission in the historical full-duplex link, the first transmitting sender of the historical full-duplex link is the same as the first transmitting sender of the full-duplex link, and the history is all The first transmitting receiver of the duplex link is the same as the first transmitting receiver of the full duplex link.
  • the performance gain of the second station after the current station accesses the historical full duplex link is The first transmission rate and the second transmission rate of the historical full duplex link are determined.
  • an embodiment of the present invention provides an access point for wireless full duplex communication, including:
  • a processor configured to determine a performance gain after the second transmission in each of the remaining stations in the full duplex link except for the first transmission included station, where the full duplex link includes the first transmission and the The second sending, the first sending and the second sending are simultaneously performed at the same frequency; and, for determining that each of the remaining stations except the first transmitting station accesses the full duplex link a maximum value of the performance gains after the second transmission; and, when the maximum value of the performance gains is greater than a preset gain threshold, accessing the site corresponding to the maximum value of the performance gains to the second send.
  • the processor is further configured to determine, according to the historical information, each of the remaining stations except the first transmission to access the full duplex link a performance gain after the second transmission, where the historical information is a performance gain after the second transmission in the full-duplex link of each of the stations except the first transmission site before the current time.
  • the first transmitting sender of the historical full-duplex link is the same as the first sending sender of the full-duplex link, and the first transmitting receiver of the historical full-duplex link and the full double The first sender of the worker link is the same.
  • the remaining each station except the first transmission includes accessing the historical full duplex link
  • the performance gain after the second transmission is determined according to the first transmission rate and the second transmission rate of the historical full duplex link.
  • An embodiment of the present invention provides a method, an apparatus, and a station for wireless full-duplex communication.
  • a station first determines a performance gain after accessing a second transmission before accessing a full-duplex link, when the performance gain is greater than The preset threshold, that is, the communication condition is met, and the performance gain reaches the preset value, the station will compete for access to the full-duplex link, that is, enter the back-off phase. Further, the station detects whether there is another station after entering the back-off state.
  • the priority of accessing the full duplex link is negatively related to the backoff duration or the backoff window, so if the station is not in the backoff duration or the backoff window ends If the other station accesses the second transmission, it indicates that the backoff duration of the station is the shortest or the backoff window is the smallest, that is, the performance gain after the second transmission is estimated to be the largest, and the station accesses the second transmission when the backoff duration or the backoff window ends. In this way, when the estimated performance gain of the station is greater than the preset threshold and is the maximum value, the second transmission is accessed to ensure the integrity of the full duplex link. Gain and throughput to achieve the desired effect, improve the system spectral efficiency.
  • An embodiment of the present invention provides a method, an apparatus, and an access point for wireless full-duplex communication.
  • the AP first determines that each of the other stations except the first transmission includes access to the full duplex. a performance gain after the second transmission in the link, and determining a maximum value of the performance gain after the second transmission in each of the remaining stations connected to the full duplex link except for the site included in the first transmission; When the maximum value in the medium is greater than the preset gain threshold, the corresponding station is connected to the second transmission.
  • the AP determines the priority of accessing the second transmission according to the performance gain of the second transmission in the full-duplex link of each station.
  • the communication condition is met, and the performance gain is achieved.
  • the preset value is used, the corresponding station is connected to the second transmission. Therefore, when the estimated maximum performance gain is greater than the preset threshold, the AP accesses the second transmission corresponding to the maximum performance gain to ensure full duplex. The performance gain and throughput of the link achieve the desired results, improving system spectrum utilization.
  • FIG. 1 is a schematic structural diagram of an embodiment of the present invention
  • FIG. 3 is a flowchart of a method according to another embodiment of the present invention.
  • FIG. 5 is a schematic timing diagram of another embodiment of the present invention.
  • FIG. 6 is a timing diagram of another embodiment of the present invention.
  • FIG. 7 is a flowchart of a method according to another embodiment of the present invention.
  • FIG. 8 is a timing diagram of another embodiment of the present invention.
  • FIG. 9 is a flowchart of a method according to another embodiment of the present invention.
  • FIG. 10 is a timing diagram of another embodiment of the present invention.
  • FIG. 11 and FIG. 12 are schematic structural diagrams of a device according to another embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a device according to another embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a station according to another embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of an access point according to another embodiment of the present invention.
  • APs are also called wireless access points or hotspots.
  • the AP is an access point for mobile computer users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet.
  • the standard adopted by AP is IEEE (English: Institute of Electrical and Electronics Engineers) 802.11 series.
  • the AP may be a terminal device or a network device with a Wi-Fi chip.
  • the AP may be a device that supports the 802.11ax system. Further, the AP may be configured to support multiple WLANs such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a (English: Wireless Local Area Network, Chinese: Wireless LAN) Standard equipment.
  • the site can be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • a wireless communication terminal For example: mobile phones that support Wi-Fi communication, tablets that support Wi-Fi communication, set-top boxes that support Wi-Fi communication, and computers that support Wi-Fi communication.
  • the site can support the 802.11ax system. Further optionally, the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • the embodiment of the present invention can be applied to a Wi-Fi system.
  • the network may include multiple basic service sets, and each basic service set may include one AP and multiple associated with the AP.
  • STA as shown in FIG. 1, STA1, STA2, STA3, and STA4 are sites associated with the AP.
  • STA1, STA2, STA3, and STA4 are sites associated with the AP.
  • the process of forming a full-duplex link in a scenario in which the AP has full-duplex capability and the STA does not have full-duplex capability is taken as an example.
  • the AP has the full-duplex capability and the STA does not have the full-duplex capability.
  • the AP simultaneously accesses the first transmission and the second transmission of the full-duplex link, that is, if the first transmission is the STA1 sending data to the AP, the second The sending is an AP sending data to other stations; if the first sending is that the AP sends data to the STA1, the second sending is that the other station sends data to the AP.
  • the first transmission may be DCF (English: Distributed Coordination Function) in 802.11, EDCA (English: Enhanced Distributed Coordination Access, Chinese: enhanced distributed coordination access) and other contention access, or AP access method; the first transmission may be initiated by the AP or by the STA.
  • the STA other than the STA of the first transmission receiver contends for the opportunity as the sender of the second transmission, or the AP determines by scheduling other STAs other than the STA of the first transmission receiver.
  • the sender of the second transmission when the first transmission is initiated by the STA, the STAs other than the STAs of the first transmission sender compete for the opportunity of the receiver as the second transmission, and then the STA that successfully competes informs the AP of the AP
  • the AP determines the sender of the second transmission by scheduling other STAs other than the STA of the first transmitting receiver.
  • An embodiment of the present invention provides a method for wireless full duplex communication, which is used in a station. As shown in FIG. 2, the method includes:
  • the station estimates a performance gain of the second station after the current station accesses the full duplex link.
  • the full-duplex link includes a first transmission and a second transmission, and the first transmission and the second transmission are simultaneously performed at the same frequency.
  • the execution principal site is the current site.
  • prior to the current site is estimated performance gain access station after a second full duplex link transmission can also obtain the current station receives the first transmission frame sent by the sender of the received power p a, and the current site Receiving the received power p b of the frame sent by the first transmitted receiver, that is, p a is the power of the received frame when the current station receives the frame sent by the sender of the first transmission; p b is the current station receiving from the first The power of the received frame when the frame sent by the receiver is sent.
  • the station estimates that the performance gain mode of the second transmission after the current station accesses the full-duplex link may be to estimate the performance gain according to p a and p b .
  • the site can be based on the formula Calculate the performance gain, where G is the performance gain.
  • a first recipient receives a frame transmitted from a first transmission sent by the sender of the received power p c, i.e., a first transmission p c
  • the power of the received frame, p c may be measured by the first transmitted receiver.
  • the manner in which the station estimates the performance gain according to p a and p b can also estimate the performance gain according to p a , p b and p c , and the estimated performance gain is more accurate.
  • the station first determines whether the p c is greater than the first power threshold, and the first power threshold is preset; when the p c is greater than the first power threshold, the station according to the formula Calculating performance gain; when p c is not greater than the first power threshold, the station is based on the formula Calculate the performance gain, where G is the performance gain.
  • Manner 2 The station first determines whether p c is less than a second power threshold, and the second power threshold is preset; when p c is less than the second power threshold, the station according to the formula Calculating performance gain; when p c is not less than the second power threshold, the station determines whether p c is greater than a third power threshold, the third power threshold is preset, and the third power threshold is greater than the second power threshold; when p c is greater than the third Power threshold when the site is based on the formula Calculate performance gain; when p c is not greater than the third power threshold, the station is based on the formula Calculate performance gains.
  • the performance gains are estimated according to the data obtained in real time, and the error may be generated when the network topology result changes and the channel changes, and the error is estimated according to the historical data.
  • the data is more accurate.
  • the station may obtain p a by listening to a sending request RTS (Request To Send) sent by the first sending sender, or p a is preset for the current site; the site may preset p b or pass The CTS (Clear To Send) acquisition sent by the receiver of the first transmission is monitored.
  • the p c is obtained by the current station from the indication information sent by the first sending receiver, and the indication information may be carried by the CTS.
  • the method for estimating the performance gain of the second station after the current station accesses the full-duplex link may also estimate the performance gain according to the historical information.
  • the historical information is that the current station access history is full duplex before the current time.
  • Performance gain after the second transmission in the link, the first transmitting sender of the historical full-duplex link is the same as the first transmitting sender of the full-duplex link, and the first transmitting receiver of the historical full-duplex link Same as the first sender of the full-duplex link.
  • the performance gain after the second transmission in the site access full-duplex link may be determined according to the first transmission rate and the second transmission rate of the historical full-duplex link.
  • the station enters a retracted state.
  • the backoff duration or the backoff window is used to indicate the duration of the current site entering the backoff state, and the performance gain is negatively correlated with the backoff duration or the backoff window.
  • the station accesses the second transmission when the backoff duration or the backoff window ends.
  • the priority of the second transmission successor is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, due to the success ratio. It only reflects the success, failure, and success ratio of the second transmission. It does not specifically report the specific status of the full-duplex link communication after the second access is sent to the site, and the second is after the station accesses the full duplex. The transmission is successful, but sometimes the performance gain is very low, and the quality of full-duplex communication cannot be guaranteed.
  • the estimated performance gains of the stations are specific values, and then the priority of the second transmission in the full-duplex link is determined according to the performance gain, and the site access full double is more intuitively reflected.
  • the communication status of the second transmission in the work link, the determined priority of the station accessing the second transmission is more accurate, and the performance gain during the full duplex communication is avoided.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the site in the present invention first determines the performance gain after accessing the second transmission before accessing the full-duplex link. When the performance gain is greater than the preset threshold, the communication condition is met, and the performance gain reaches the preset. When the value is reached, the station will contend to access the full-duplex link, that is, enter the back-off phase.
  • the station After the station enters the back-off state, it detects whether another station accesses the second transmission, due to the estimated performance gain and the back-off time or backoff.
  • the window is negatively correlated.
  • the priority of accessing the full-duplex link is negatively related to the back-off duration or the back-off window. Therefore, if the station does not detect the other station accessing the second transmission before the end of the back-off or the back-off window, the site is described.
  • the backoff duration is the shortest or the backoff window is the smallest, that is, the performance gain after the second transmission is estimated to be the largest, and the station accesses the second transmission when the backoff duration or the backoff window ends, so that when the estimated performance gain of the station is greater than the preset threshold and When the maximum value is reached, the second transmission is accessed to ensure that the performance gain and throughput of the full-duplex link achieve the expected effect, and the system spectrum is improved. Rate.
  • a further embodiment of the present invention provides a method for wireless full-duplex communication, which is used in an AP. As shown in FIG. 3, the method includes:
  • the AP determines, after each second station except the first transmission, the performance gain of the second transmission after accessing the full duplex link.
  • the full-duplex link includes a first transmission and a second transmission, and the first transmission and the second transmission are simultaneously performed at the same frequency.
  • the method for determining, by the AP, the performance gain after the second transmission in the full-duplex link of each of the other stations except the first one that is included in the first transmission may be: the AP determines, according to the historical information, that the first transmission includes Each of the remaining sites outside the site accesses the performance gain after the second transmission in the full-duplex link.
  • the historical information is the second transmission in the full-duplex link of the site access history except the first transmission before the current time.
  • Performance gain, the first sender of the historical full-duplex link is the same as the first sender of the full-duplex link, and the first sender and the full-duplex link of the historical full-duplex link
  • the first sender is the same as the receiver.
  • the performance gain after the second transmission in each of the remaining full-duplex links except the first transmission includes the first transmission rate and the second transmission rate of the historical full-duplex link.
  • the AP determines a maximum value of performance gains after the second transmission in each of the remaining stations of the full duplex link except the station included in the first transmission.
  • the AP accesses the second transmission corresponding to the station corresponding to the maximum value of the performance gain.
  • the priority of the second transmission successor is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, due to the success ratio. It only reflects the success, failure, and success ratio of the second transmission. It does not specifically report the specific status of the full-duplex link communication after the site accesses the second transmission, and the site accesses the full-duplex. Second, the transmission is successful, but sometimes the performance gain is very low, and the quality of full-duplex communication cannot be guaranteed.
  • the estimated performance gains of the stations are specific values, and then the priority of the second transmission in the full-duplex link is determined according to the performance gain, which is more straightforward. The view shows that the station accesses the second transmitted communication state in the full-duplex link, and the determined station access second transmission priority is more accurate, avoiding the situation that the performance gain during the full-duplex communication is too low.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the AP first determines the performance gain of the second transmission after accessing each of the stations in the full-duplex link except for the station included in the first transmission, and determines the first The maximum of the performance gains after the second transmission of each of the remaining stations connected to the included station is transmitted; when the maximum value of the performance gain is greater than the preset gain threshold, the corresponding station is Accessing the second transmission.
  • the AP determines the priority of accessing the second transmission according to the performance gain of the second transmission in the full-duplex link of each station.
  • the determined maximum performance gain is greater than the preset gain threshold, the communication condition is met, and the performance gain is achieved.
  • the preset value is used, the corresponding station is connected to the second transmission. Therefore, when the estimated maximum performance gain is greater than the preset threshold, the AP accesses the second transmission corresponding to the maximum performance gain to ensure full duplex.
  • the performance gain and throughput of the link achieve the desired results, improving system spectrum utilization.
  • a further embodiment of the present invention provides a method for wireless full-duplex communication, for example, a scenario in which an AP has full-duplex capability and an STA does not have full-duplex capability.
  • the first transmission in the full-duplex link takes the data transmission between the STA1 and the AP as an example.
  • the first transmission may be initiated by the AP, or the first transmission may be initiated by the STA1, which may be determined by means of contention or scheduling.
  • the STA other than STA1 is used as the sender of the second transmission through the contention or scheduling mode;
  • the STA is notified by other STAs other than STA1 through the contention or scheduling mode, and the AP selects other STAs as the second transmission receiver.
  • the first transmission is initiated by the AP, that is, the AP is the sender of the first transmission and the receiver of the second transmission, and STA1 is the receiver of the first transmission, and other STAs other than STA1 compete for the second transmission.
  • the sender is STA2 indicating that the contention is the sender of the second transmission.
  • the method includes:
  • STA2 listens to the first transmitted RTS and CTS.
  • the AP may access the first in a competitive manner such as DCF and EDCA in 802.11.
  • the sending or the scheduling method is used to access the first sending.
  • the AP contends for the access, and the AP initiates the first sending, and becomes the first sending sender, and sends the RST to the STA1, and the STA1 is sent as the first sending.
  • the receiving party after receiving the RTS, replies to the CTS.
  • the AP waits for the SIFS (Short Interframe Space) and starts transmitting the first data DATA.
  • the first DATA is sent by the sender to the first transmission.
  • the square data indicates the length of the first DATA in the preamble preamble.
  • FIG. 5 is a timing diagram of an embodiment of the present invention.
  • the upper part of the dotted line is the total timing diagram of the system, and the lower part of the dotted line is the timing diagram of AP, STA1, and STA2 respectively.
  • DIFS Distributed Inter-frame Spacing
  • Interframe interval is the time for waiting for the channel to be idle
  • BO Backoff
  • the backoff phase when the AP contends to initiate the first transmission
  • the contention is the sender of the first transmission
  • the RTS is sent to STA1.
  • STA1 receives the RTS
  • STA2 listens to the first sent RTS
  • STA1 replies to the CTS
  • the AP receives the CTS
  • STA2 listens to the first transmitted CTS.
  • STA2 determines whether the channel satisfies the condition for forming a full-duplex link. If the channel satisfies the condition for forming a full-duplex link, step 303 is performed. If the channel does not satisfy the condition for forming a full-duplex link, step 301 is performed. .
  • the condition that the full-duplex link can be formed is that the self-interference of the first transmission sent by the AP to the second reception can be eliminated to the communicable range, and the interference of the second transmission to the reception of the first transmission is permissible in the communication. range.
  • the STA2 acquires the received power p a of the frame sent by the receiving AP and the received power p b of the frame sent by the receiving STA1.
  • STA2 can obtain p a and p b through the RTS and CTS that are heard.
  • the value of p a can be determined as a preset value.
  • the value of p b can be determined as a preset value, for example, let p b be -82 dBm.
  • the STA2 acquires the received power p c of the frame sent by the receiving AP measured by the STA1.
  • the indication information transmitted by the STA1 STA2 may obtain p c, for example, the STA1 carried p c in the CTS, STA2 by step 301 listens CTS, the CTS can be carried obtain p c.
  • the STA2 pre-estimates the performance gain of accessing the full-duplex link.
  • the STA2 pre-estimates the performance gain of the full-duplex link.
  • the following two methods are used as an example in the embodiment of the present invention.
  • Method 1 Calculate the performance gain G by p a and p b according to a specific function, for example, according to the formula Calculation.
  • Manner 2 preset at least one p c threshold, compare the obtained p c value with a threshold, and use different functions in different cases to calculate the performance gain G by p a , p b , and p c .
  • p c have a threshold of -54 dBm, and when the obtained p c value is greater than -54 dBm, according to the formula Calculate the performance gain; when the obtained p c value is not greater than -54dBm, according to the formula Calculate performance gains.
  • the two thresholds of p c be -58.4 dBm and -52.5 dBm, respectively, when the obtained p c value is greater than -52.5 dBm, according to the formula Calculate the performance gain; when the obtained p c value is less than -52.5dBm and greater than -58.4dBm, according to the formula Calculate the performance gain; when the obtained p c value is less than -58.4dBm, according to the formula Calculate performance gains.
  • the performance gains are estimated according to the data obtained in real time, and the error may be generated when the network topology result changes and the channel changes, and the error is estimated according to the historical data.
  • the data is more accurate.
  • STA2 determines whether the estimated performance gain is greater than a gain threshold. If the estimated performance gain is greater than the gain threshold, step 307 is performed; otherwise, step 301 is performed.
  • STA2 compares the estimated performance gain with the gain threshold. When the estimated performance gain is greater than the gain threshold, STA2 accesses the second transmission, and the performance gain of the full-duplex link is guaranteed.
  • STA2 After the AP sends the preamble preamble of the first DATA, STA2 enters a backoff phase.
  • the duration of the backoff phase may be represented by a backoff window or a backoff duration.
  • P is a phase in which the AP transmits the preamble of the first DATA after waiting for the SIFS, and then the STA2 enters the BO2 backoff phase.
  • the STA2 determines, in the backoff phase, whether another station accesses the second sending. If no other station accesses the second sending, step 309 is performed; otherwise, step 301 is performed.
  • the second DATA is the data that the STA2 sends to the AP in the second transmission.
  • STA2 can align with the first DATA sent by the AP by adding redundancy before sending the second DATA to the AP.
  • the AP receives the second data sent by the STA2 while transmitting the first data to the STA1, and the STA1 receives the first data sent by the AP, and the STA2 sends the second data to the AP after the BO2, in the STA2 sequence.
  • the pad is the content added when the first DATA sent by the AP is aligned by adding redundancy.
  • the STA2 waits for the ACK of the AP reply after waiting for the SIFS.
  • the first sending is an AP sending data to the STA1 as an example.
  • the STA1 is the first sending sender
  • the AP is the first sending.
  • the receiving party and the second transmitting sender in the data processing process in which STA2 competes as the receiving party of the second transmission, in step 309, when the STA2 backoff phase ends, the ARTS is sent an ARTS (Announcement Request To Send).
  • Step 310 needs to be performed, and the timing diagram is as shown in FIG. 6.
  • the ratio of the second transmission success is determined by the ratio of the second transmission success when the station is the second transmission receiver in the same scenario in the full duplex communication process.
  • the first level because the success rate only reflects the success, failure, and success ratio of the second transmission, and can not specifically report the specific state of the full-duplex link communication after the second access of the station is accessed, and the site access is full.
  • the second transmission succeeds after duplexing, sometimes the performance gain is low, and the quality of full-duplex communication cannot be guaranteed.
  • the estimated performance gains of the stations are specific values, and then the priority of the second transmission in the full-duplex link is determined according to the performance gain, and the site access full double is more intuitively reflected. The communication status of the second transmission in the work link, the determined priority of the station accessing the second transmission is more accurate, and the performance gain during the full duplex communication is avoided.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the station first determines the performance gain after accessing the second transmission before accessing the full duplex link. When the performance gain is greater than the preset threshold, that is, the communication condition is met, the station only The access to the full-duplex link will enter the back-off phase. Further, after the station enters the back-off state, it detects whether another station accesses the second transmission. The larger the estimated performance gain, the shorter the back-off duration or the back-off window.
  • the site has the shortest back-off or the minimum back-off window. That is, it is estimated that the performance gain after accessing the second transmission is the largest, so that the station accesses the second transmission when the backoff duration or the backoff window ends, and the performance gain of the full duplex link can be guaranteed regardless of whether the network topology changes.
  • the amount achieves the expected effect and improves the system spectrum utilization.
  • a further embodiment of the present invention provides a method for wireless full-duplex communication, in which a full-duplex link is formed in a scenario in which an AP (Access Point) has full-duplex capability and the STA does not have full-duplex capability. example.
  • the first transmission is initiated by the AP, and the STAs other than STA1 contend for the second transmission as an example, and STA2 indicates that the competition is the second transmission sender, and there is no scenario in which the RTS and the CTS interact.
  • the method includes:
  • the STA2 listens to the preamble preamble of the first sending DATA.
  • the AP first obtains the medium access right, and the timing diagram is as shown in FIG. 8.
  • the first DATA preamble is sent to the STA1.
  • STA2 receives the preamble of the first DATA, Knowing that they have access to the second transmission, they start competing for the second transmission.
  • STA2 estimates the performance gain of accessing the full duplex link.
  • the estimation method of the performance gain G is as follows: STA2 maintains a performance gain list, as shown in Table 1, the list records the last n times of the specific combination of the link with the STA1 and the AP, and STA2 is used as the second transmission. Forming the performance gain G 1,2...n ' of the full-duplex link, after STA2 queries G 1,2...n ' from the list, the current STA2 can be estimated to access the full-duplex link through a mathematical algorithm. Performance gain.
  • STA2 determines whether the estimated performance gain is greater than a gain threshold. If the estimated performance gain is greater than the gain threshold, step 404 is performed; otherwise, step 401 is performed.
  • STA2 After the AP sends the preamble of the first DATA, STA2 enters a backoff phase.
  • STA2 determines, in the backoff phase, whether another station accesses the second sending. If no other station accesses the second sending, step 406 is performed; otherwise, step 401 is performed.
  • the duration of the backoff phase may be represented by a backoff window or a backoff duration.
  • the STA2 waits for the ACK of the AP reply after waiting for the SIFS.
  • step 403 to step 407 is related to steps 306 to 310. The same is not repeated here.
  • the priority of the second transmission successor is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, due to the success ratio. It only reflects the success, failure, and success ratio of the second transmission. It does not specifically report the specific status of the full-duplex link communication after the second access is sent to the site, and the second is after the station accesses the full duplex. The transmission is successful, but sometimes the performance gain is very low, and the quality of full-duplex communication cannot be guaranteed.
  • the estimated performance gains of the stations are specific values, and then the priority of the second transmission in the full-duplex link is determined according to the performance gain, and the site access full double is more intuitively reflected.
  • the communication status of the second transmission in the work link, the determined priority of the station accessing the second transmission is more accurate, and the performance gain during the full duplex communication is avoided.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • STA2 first determines the performance gain after accessing the full-duplex link before accessing the full-duplex link. When the performance gain is greater than the preset threshold, that is, the communication condition is met, The site will enter the back-off phase, that is, the STA2 enters the back-off phase. Further, after entering the back-off state, STA2 detects whether another station accesses the second transmission.
  • the station back-off duration is the shortest or the back-off window.
  • the minimum that is, the performance gain after the second transmission is estimated to be the largest, so that the station accesses the second transmission when the back-off time or the back-off window ends, and the performance of the full-duplex link can be guaranteed regardless of whether the network topology changes. Gain throughput achieves the desired results and improves system spectrum utilization.
  • a further embodiment of the present invention provides a method for forming a full-duplex link in a scenario in which the AP has full-duplex capability and the STA does not have full-duplex capability.
  • the first sending is initiated by the sender that is sent by the STA1 as the first sending, and the AP is the receiving party and the second sending of the first sending.
  • the sending sender, other STAs other than STA1 uses the AP scheduling as the sender of the second transmission as an example, and STA2, STA3, and STA4 indicate that the AP can be scheduled as the sender of the second transmission, and there is no scenario in which the RTS and the CTS interact.
  • the method includes:
  • the AP After receiving the preamble of the first DATA, the AP determines that STA2, STA3, and STA4 access the performance gain of the second transmission.
  • the STA After the STA obtains the medium access right, the STA sends the preamble of the first DATA to the AP; after receiving the preamble of the first DATA, the AP determines the performance gain of the STA2, STA3, and STA4 to access the second transmission, and the timing diagram is as follows.
  • Figure 10 shows.
  • a performance gain list can be maintained in the AP.
  • the first transmission is the AP and the STA1, the STA2, STA3, and STA4 access the performance gain G' of the second transmission, for example, Table 2.
  • the AP determines, according to the values in Table 2, the performance gains of STA2, STA3, and STA4 accessing the second transmission, for example, calculating an average value of the corresponding gains of each station.
  • the AP determines a maximum value of performance gains of STA2, STA3, and STA4 accessing the second transmission.
  • the embodiment of the present invention takes the data recorded in Table 2 as an example. By calculating the average value, it can be concluded that the average performance gain of STA2 is 1.65, the average performance gain of STA3 is 1.43, and the average performance gain of STA4 is 1.26, so the maximum performance is obtained. The gain is 1.65.
  • the AP determines whether the maximum performance gain is greater than a preset gain threshold. If the maximum performance gain is greater than the preset gain threshold, step 504 is performed; otherwise, step 507 is performed.
  • the maximum performance gain is compared with the preset gain threshold. When the maximum performance gain is greater than the preset gain threshold, a full-duplex link is formed to ensure that the performance gain of the full-duplex link achieves the desired effect.
  • the AP determines a site corresponding to the maximum performance gain.
  • the maximum gain value may be obtained according to the value, thereby obtaining the station corresponding to the maximum gain.
  • the embodiment of the present invention takes the data recorded in Table 2 as an example. By calculating the average value, it can be concluded that the average performance gain of STA2 is 1.65, the average performance gain of STA3 is 1.43, and the average performance gain of STA4 is 1.26, so the maximum performance gain corresponds.
  • the site is STA2.
  • the AP sends a second DATA to STA2.
  • the AP is aligned with the first DATA sent by STA1 by adding redundancy.
  • the AP receives the first DATA while transmitting the second DATA to the STA2.
  • the AP After the AP waits for the SIFS, the AP receives the ACK sent by the STA2.
  • the AP and STA1 perform data transmission.
  • step 503 the maximum value of the performance gain calculated in step 501 is less than the preset gain threshold, that is, the full-duplex link cannot form a full-duplex link, and the full-duplex link is no longer formed. Only data transmission between the AP and STA1 is performed.
  • the priority of the second transmission successor is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, due to the success ratio. It only reflects the success, failure, and success ratio of the second transmission. It does not specifically report the specific status of the full-duplex link communication after the second access is sent to the site, and the second is after the station accesses the full duplex. The transmission is successful, but sometimes the performance gain is very low, and the quality of full-duplex communication cannot be guaranteed.
  • the estimated performance gains of the stations are specific values, and then the priority of the second transmission in the full-duplex link is determined according to the performance gain, and the site access full double is more intuitively reflected.
  • the communication status of the second transmission in the work link, the determined priority of the station accessing the second transmission is more accurate, and the performance gain during the full duplex communication is avoided.
  • the station is used as the second transmission in the same scenario.
  • the proportion of the second transmission success at the receiver determines its priority as the second transmission receiver, resulting in a decrease in throughput and a reduction in system spectrum utilization during communication.
  • the AP determines the performance gain of the second transmission after accessing each of the other duplex stations except the first transmission station, and determines the first transmission.
  • Each of the remaining stations outside the included site accesses the maximum of the performance gains after the second transmission in the full-duplex link; when the maximum value of the performance gain is greater than the preset gain threshold, the corresponding station is connected Into the second transmission.
  • the AP first determines the performance gain of the second transmission after the site accesses the full-duplex link except the first transmission, and then corresponds to the maximum value of the performance gain when the maximum value of the performance gain is greater than the preset gain threshold.
  • the site access is sent to the second.
  • the AP determines the priority of accessing the second transmission according to the performance gain of the second transmission in the full-duplex link of each station.
  • the corresponding station is connected.
  • the network topology can ensure the performance gain throughput of the full-duplex link to achieve the expected effect regardless of whether the network topology changes, and improve the system spectrum utilization.
  • a further embodiment of the present invention provides a device 60 for wireless full duplex communication. As shown in FIG. 11, the device 60 includes:
  • the estimating unit 61 is configured to estimate a performance gain after the second transmission in the current station accessing the full-duplex link, where the full-duplex link includes the first sending and the second sending, where the first sending and the sending Said that the second transmission is performed simultaneously with the same frequency;
  • the backoff unit 62 is configured to enter a back-off state when the performance gain is greater than a preset gain threshold, wherein the performance gain is negatively related to a back-off duration or a back-off window, and the back-off duration or the back-off window is used to indicate The duration of the current site entering the retracted state;
  • the access unit 63 is configured to: when the current station does not detect that the other station accesses the second sending before the end of the backoff period or the end of the backoff window, when the backoff duration or the backoff window ends Accessing the second transmission.
  • the device 60 may further include:
  • An obtaining unit 64 configured to acquire, by the current station, a received power p a of a frame sent by the first sending sender;
  • the obtaining unit 64 is further configured to acquire, by the current station, a received power p b of a frame sent by the first sending receiver;
  • the estimating unit 61 is specifically configured to estimate the performance gain according to the p a and the p b .
  • the estimating unit 61 is specifically configured according to a formula The performance gain is calculated, where G represents the performance gain.
  • the acquiring unit 64 is further configured to acquire, by the first sending receiver, the received power p c of the frame sent by the first sending sender;
  • the estimating unit 61 is further configured to estimate the performance gain according to the p a , the p b and the p c .
  • the device 60 may further include:
  • the first determining unit 65 is configured to determine whether the p c is greater than a first power threshold, where the first power threshold is preset;
  • the estimating unit 61 is specifically used according to a formula Calculating the performance gain, where G represents the performance gain;
  • the estimating unit 61 is specifically used according to a formula Calculate the performance gain.
  • the device 60 may further include:
  • the second determining unit 66 is configured to determine whether the p c is smaller than a second power threshold, where the second power threshold is preset;
  • the estimating unit 61 is specifically used according to a formula Calculating the performance gain, where G represents the performance gain;
  • the second determining unit 66 is further configured to determine whether the p c is greater than a third power threshold, where the third power threshold is preset, where the The three power threshold is greater than the second power threshold;
  • the estimating unit 61 is specifically used according to a formula Calculating the performance gain
  • the estimating unit 61 is specifically configured according to a formula Calculate the performance gain.
  • the p a is obtained by the current station by listening to the sending request RTS sent by the first sending sender, or the p a is preset for the current station; the p b is determined by the current allowing the first receiver station by listening to the transmission transmits a CTS transmitted acquisition, or the p b is set in advance of the current site.
  • the p c is obtained by the current station from the indication information sent by the first sending receiver, and the indication information is carried by the CTS.
  • the estimating unit 61 is further configured to estimate the performance gain according to the historical information, where the historical information is a performance gain after the second transmission in the current station access history full-duplex link before the current time.
  • the first transmitting sender of the historical full-duplex link is the same as the first transmitting sender of the full-duplex link, and the first transmitting and receiving parties of the historical full-duplex link and the whole The first sender and receiver of the duplex link are the same.
  • the performance gain of the second station after the current station accesses the historical full-duplex link is determined according to the first sending rate and the second sending rate of the historical full-duplex link.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the device 60 in the embodiment of the present invention first determines the performance gain after accessing the second transmission before accessing the full duplex link. When the performance gain is greater than the preset threshold, that is, the communication condition is met, the device 60 will compete for access to the full-duplex link, that is, enter the back-off phase. Further, the larger the estimated performance gain, the shorter the back-off duration or the smaller the back-off window, the shorter the back-off duration or the smaller the back-off window.
  • the device 60 detects whether another device 60 accesses the second transmission after entering the retracted state, and if the device 60 does not detect the other device 60 before the end of the retreat or the end of the back-off window
  • the device 60 has the shortest retraction duration or the minimum retreat window, that is, the performance gain after the second transmission is estimated to be the largest, so that the device 60 accesses the second transmission when the retreat duration or the backoff window ends. Regardless of whether the network topology changes, the performance gain throughput of the full-duplex link can be expected to achieve the expected effect, and the system spectrum utilization rate is improved.
  • a further embodiment of the present invention provides a device 70 for wireless full duplex communication. As shown in FIG. 13, the device 70 includes:
  • a determining unit 71 configured to determine a performance gain after the second transmission in each of the remaining stations in the full duplex link except for the first transmission included station, where the full duplex link includes the first sending sum The second sending, the first sending and the second sending are performed simultaneously at the same frequency;
  • the determining unit 71 is further configured to determine a maximum value of performance gains after the second transmission in the full duplex link of each of the remaining stations except the first transmission included;
  • the access unit 72 is configured to: when a maximum value of the performance gains is greater than a preset gain threshold, access a station corresponding to a maximum value of the performance gains to the second transmission.
  • the determining unit 71 determines, according to the historical information, a performance gain after the second transmission in each full-duplex link except for the station included in the first transmission, where the historical information is at the current time.
  • each of the remaining stations except the first transmission includes access performance gains after the second transmission in the historical full-duplex link, and the first transmission sender and the location of the historical full-duplex link.
  • the first transmitting sender of the full-duplex link is the same, and the first transmitting receiver of the historical full-duplex link is the same as the first transmitting receiver of the full-duplex link.
  • the performance gain of the second transmission after accessing each of the other stations except the first transmission including the first full-duplex link according to the first transmission rate of the historical full-duplex link and The second transmission rate is determined.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • Reduced and reduced system spectrum utilization Compared with the prior art, the apparatus 70 in the embodiment of the present invention determines the performance gain of the second transmission after accessing each of the stations in the full duplex link except for the station included in the first transmission, and determines the first The maximum of the performance gains after the second transmission of each of the remaining stations connected to the included station is transmitted; when the maximum value of the performance gain is greater than the preset gain threshold, the corresponding station is Accessing the second transmission.
  • the device 70 first determines a performance gain after the second transmission in the site access full duplex link except the first transmission, and then maximizes the performance gain when the maximum value in the performance gain is greater than the preset gain threshold.
  • the corresponding site accesses the second transmission.
  • the device 70 determines the priority of accessing the second transmission according to the performance gain of the second transmission after the access of each station to the full-duplex link, when the determined maximum performance gain is greater than the preset.
  • the gain threshold is reached, the corresponding station is connected to the second transmission, so that the network topology can ensure the performance gain throughput of the full-duplex link to achieve the expected effect regardless of whether the network topology changes, and improve the system spectrum utilization.
  • a further embodiment of the present invention provides a station 80 for wireless full-duplex communication.
  • the station 80 can be used to implement the steps and methods in the method embodiment of FIG.
  • Site 80 includes an antenna 810, a transceiver 820, a processor 830, and a memory 840.
  • Processor 830 controls the operation of station 80 and can be used to process signals.
  • Memory 840 can include read only memory and random access memory and provides instructions and data to processor 830.
  • Transceiver 820 can be coupled to antenna 810.
  • the various components of station 80 are coupled together by a bus system 850, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 850 in the figure.
  • processor 830 can store instructions to perform the following process:
  • the processor 830 is configured to estimate a performance gain after the second transmission in the current station accessing the full-duplex link, where the full-duplex link includes the first sending and the second sending, where the first sending and the sending The second transmission is performed at the same time; and is configured to enter a backoff state when the performance gain is greater than a preset gain threshold, wherein the performance gain is negatively correlated with a backoff duration or a backoff window, and the backoff duration or The backoff window is used to indicate the duration of the current site entering the backoff state; and is configured to: if the current site does not detect other sites accessing the second sending before the backoff duration or the backoff window ends And accessing the second transmission when the backoff duration or the backoff window ends.
  • the processor 830 is further configured to acquire, by the current station, a received power p a of a frame sent by the first sending sender, and a method for acquiring, by the current station, the first sending The received power p b of the frame transmitted by the receiver; and, for estimating the performance gain from the p a and the p b .
  • processor 830 is further configured to The performance gain is calculated, where G represents the performance gain.
  • the processor 830 is further configured to acquire a reception power p c receives the frame sent by the sender of a first transmission sent by the first recipient; and, according to the p a, the The performance gain is estimated by p b and the p c .
  • the processor 830 is further configured to determine whether the p c is greater than a first power threshold, where the first power threshold is preset; and, when the p c is greater than the first power threshold Estimating the performance gain according to the p a , the p b , and the p c includes: according to a formula Calculating the performance gain, wherein G represents the performance gain; and, for when the p c is not greater than the first power threshold, the according to the p a , the p b , and the p c estimating the performance gains including: according to the formula Calculate the performance gain.
  • the processor 830 is further configured to determine whether the p c is less than a second power threshold, where the second power threshold is preset; and, when the P c is less than the second power threshold Estimating the performance gain according to the p a , the p b , and the p c includes: according to a formula Calculating the performance gain, where G represents the performance gain; and, for determining whether the p c is greater than a third power threshold when the p c is not less than the second power threshold, the third The power threshold is preset, the third power threshold is greater than the second power threshold; and, when the p c is greater than the third power threshold, the according to the p a , the p b Estimating the performance gain with the p c includes: according to a formula Calculating the performance gain; and, when the p c is not greater than the third power threshold, the estimating the performance gain according to the p a , the p b , and the p c includes: formula Calcul
  • the p a is obtained by the current station by listening to the sending request RTS sent by the first sending sender, or the p a is preset for the current station; the p b is determined by the current allowing the first receiver station by listening to the transmission transmits a CTS transmitted acquisition, or the p b the current station is set in advance.
  • the p c is obtained by the current station from the indication information sent by the first sending receiver, and the indication information is carried by the CTS.
  • the processor 830 is further configured to estimate the performance gain according to the historical information, where the historical information is a performance gain after the second transmission in the current station access history full-duplex link before the current time.
  • the first transmitting sender of the historical full-duplex link is the same as the first transmitting sender of the full-duplex link, and the first transmitting and receiving parties of the historical full-duplex link and the whole The first sender and receiver of the duplex link are the same.
  • the performance gain of the second station after the current station accesses the historical full-duplex link is determined according to the first sending rate and the second sending rate of the historical full-duplex link.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the station 80 first determines the performance gain after accessing the second transmission before accessing the full duplex link. When the performance gain is greater than the preset threshold, that is, the communication condition is met, the station 80 will compete for access to the full-duplex link, that is, enter the back-off phase. Further, the larger the estimated performance gain, the shorter the back-off duration or the smaller the back-off window, the shorter the back-off duration or the smaller the back-off window.
  • the station 80 detects whether another station 80 accesses the second transmission. If the station 80 does not detect the other station 80 before the end of the back-off or the back-off window.
  • the station 80 has the shortest retreat duration or the minimum retreat window, that is, the performance gain after the second transmission is estimated to be the largest, so that the station 80 accesses the second transmission when the retreat duration or the backoff window ends. Regardless of whether the network topology changes, the performance gain throughput of the full-duplex link can be expected to achieve the expected effect, and the system spectrum utilization rate is improved.
  • a further embodiment of the present invention provides a station 90 for wireless full-duplex communication.
  • the access point 90 can be used to implement the steps and methods in the method embodiment described in FIG.
  • Access point 90 includes an antenna 910, a transceiver 920, a processor 930, and a memory 940.
  • Processor 930 controls the operation of access point 90 and can be used to process signals.
  • Memory 940 can include read only memory and random access memory and provides instructions and data to processor 930.
  • Transceiver 920 can be coupled to antenna 910.
  • the various components of access point 90 are coupled together by a bus system 950, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 950 in the figure.
  • processor 930 can store instructions to perform the following process:
  • the processor 930 is configured to determine a performance gain after the second transmission in each of the remaining stations in the full duplex link except for the first transmission included station, where the full duplex link includes the first transmit sum
  • the second sending, the first sending and the second sending are performed simultaneously at the same frequency; and, for determining the location Determining a maximum value of performance gains after the second transmission of each of the remaining stations in the full-duplex link except for the first transmission includes; and, when the maximum value of the performance gain is greater than a preset When the gain threshold is reached, the station corresponding to the maximum value of the performance gains is accessed to the second transmission.
  • the processor 930 is further configured to determine, according to the historical information, a performance gain after the second transmission in the full duplex link of each of the stations except the first transmission included, where the historical information is Before the current time, each of the remaining stations except the first transmission includes access performance gains after the second transmission in the historical full-duplex link, and the first transmission sender of the historical full-duplex link
  • the first transmitting sender of the full-duplex link is the same as the first transmitting and receiving party of the full-duplex link
  • the first transmitting and receiving party of the full-duplex link is the same as the first transmitting and receiving party of the full-duplex link.
  • the performance gain of the second transmission after accessing each of the other stations except the first transmission including the first full-duplex link according to the first transmission rate of the historical full-duplex link and The second transmission rate is determined.
  • the priority of the second transmission receiver is determined by the proportion of the second transmission success when the station is used as the second transmission receiver in the same scenario, resulting in throughput during the communication process.
  • the AP 90 first determines the performance gain of the second transmission after accessing each of the stations in the full duplex link except for the station included in the first transmission, and determines the first The maximum of the performance gains after the second transmission of each of the remaining stations connected to the included station is transmitted; when the maximum value of the performance gain is greater than the preset gain threshold, the corresponding station is Accessing the second transmission.
  • the AP 90 first determines the performance gain after the second transmission in the site access full duplex link except the first transmission, and then when the maximum value in the performance gain is greater than the preset gain threshold, the maximum value in the performance gain is corresponding.
  • the site access is sent to the second.
  • the AP 90 determines the priority of accessing the second transmission according to the performance gain of the second transmission in the full-duplex link of each station.
  • the corresponding station is connected.
  • the network topology can ensure the performance gain throughput of the full-duplex link to achieve the expected effect regardless of whether the network topology changes, and improve the system spectrum utilization.
  • the size of the sequence numbers of the above processes is not intended.
  • the order of execution is in the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be construed as limiting the implementation of the embodiments of the present invention.
  • the method, device, station and access point of the wireless full duplex communication provided by the embodiments of the present invention may be applicable to a site or an AP, but are not limited thereto.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de communication bidirectionnelle simultanée sans fil, un dispositif, une station et un point d'accès, appartenant au domaine technique des communications, et permettant de résoudre le problème de bas débit et de faible utilisation du spectre du système dans un processus de communication provoqué par un niveau de priorité d'une station devant agir en tant que seconde partie de réception de transmission qui est déterminé par une seconde proportion de succès de transmission lorsque la station est considérée comme la seconde partie de réception de transmission dans un même scénario au sein d'un processus de communication bidirectionnelle simultanée. Le procédé de la présente invention consiste à : estimer un gain de performance après qu'une station ait accédé à une seconde transmission dans une liaison bidirectionnelle simultanée ; entrer dans un état de réduction de puissance lorsque le gain de performance est supérieur à un seuil de gain prédéfini ; si la station ne détecte pas qu'une autre station a accédé à la seconde transmission avant la fin d'une durée de réduction de puissance ou d'une fenêtre de réduction de puissance, accéder à la seconde transmission à la fin de la durée de réduction de puissance ou de la fenêtre de réduction de puissance. La présente invention est appropriée pour une station ou un point d'accès.
PCT/CN2014/088907 2014-10-20 2014-10-20 Procédé de communication bidirectionnelle simultanée sans fil, dispositif, station et point d'accès WO2016061725A1 (fr)

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Citations (3)

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CN103781181A (zh) * 2012-10-22 2014-05-07 中国移动通信集团公司 一种tdd系统用户调度方法、装置、系统和基站
US20140169234A1 (en) * 2012-12-14 2014-06-19 Futurewei Technologies, Inc. Systems and Methods for Interference Avoidance, Channel Sounding, and Other Signaling for Multi-User Full Duplex Transmission
CN104105208A (zh) * 2013-04-01 2014-10-15 中国移动通信集团公司 一种同频全双工调度方法和装置

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CN103781181A (zh) * 2012-10-22 2014-05-07 中国移动通信集团公司 一种tdd系统用户调度方法、装置、系统和基站
US20140169234A1 (en) * 2012-12-14 2014-06-19 Futurewei Technologies, Inc. Systems and Methods for Interference Avoidance, Channel Sounding, and Other Signaling for Multi-User Full Duplex Transmission
CN104105208A (zh) * 2013-04-01 2014-10-15 中国移动通信集团公司 一种同频全双工调度方法和装置

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