WO2016145662A1 - Procédé et appareil d'accès multi-utilisateur en liaison montante - Google Patents

Procédé et appareil d'accès multi-utilisateur en liaison montante Download PDF

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Publication number
WO2016145662A1
WO2016145662A1 PCT/CN2015/074604 CN2015074604W WO2016145662A1 WO 2016145662 A1 WO2016145662 A1 WO 2016145662A1 CN 2015074604 W CN2015074604 W CN 2015074604W WO 2016145662 A1 WO2016145662 A1 WO 2016145662A1
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WO
WIPO (PCT)
Prior art keywords
sta
access
frame
channels
channel
Prior art date
Application number
PCT/CN2015/074604
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English (en)
Chinese (zh)
Inventor
游理钊
姜艳平
杨帆
Original Assignee
华为技术有限公司
电子科技大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司, 电子科技大学 filed Critical 华为技术有限公司
Priority to PCT/CN2015/074604 priority Critical patent/WO2016145662A1/fr
Publication of WO2016145662A1 publication Critical patent/WO2016145662A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to an uplink multi-user access method and apparatus.
  • the embodiment of the invention provides an uplink multi-user access method and device, which reduces the protocol overhead of multiple users in the process of accessing the network.
  • the AP allocates an access resource to the accessible STA, and the accessible STA is an STA that sends an access request on the collision-free channel;
  • the AP determines the reception termination time according to the backoff window, the backoff slot, the transmission time of the access request frame, and the length of the access request frame.
  • An allocation module configured to allocate an access resource to an accessible STA, where the accessible STA is an STA that sends an access request on a collision-free channel;
  • the sending module is further configured to send a broadcast frame on the conflict channel, where the adjusted frame includes the adjusted backoff window.
  • the receiving module is further configured to: receive a channel measurement request frame sent by the AP, where the channel measurement request frame is used by Notifying the STA to send a channel measurement frame on a specified measurement resource;
  • a sixth aspect of the present invention provides a station STA, including: a processor, a memory, a communication interface, and a system bus, wherein the memory and the communication interface are connected to the processor through the system bus and complete communication with each other;
  • the processor for executing the computer-executable instructions to perform the method of any of the first and second possible implementations of the second aspect of the invention and the second aspect of the invention.
  • Step 101 The AP receives the access request frame sent by the associated STA on the K channels, and stops receiving the access request frame at the receiving termination time.
  • FIG. 2 is a timing diagram of a multi-user access process according to an embodiment of the present invention.
  • STA A All bandwidths are divided into four channels by using OFDMA technology, and five STAs are required to access the network: STA A, B. , C, D, E.
  • the (Synchronous, hereinafter referred to as SYNC) frame is a synchronization frame sent by the AP, and is used to enable each STA to determine the transmission time of the access request frame according to the synchronization frame.
  • the AP After receiving the access request frame frame sent by the STA, the AP returns to the STA.
  • the access permission frame is used to notify the STA that the channel can be accessed.
  • the AP adjusts the value of the backoff window to min ⁇ *W, W max ⁇ , where W max is the maximum value of the backoff window, W is the current value of the backoff window, ⁇ is an integer greater than 1, and ⁇ is greater than or equal to 0.5 and less than or equal to 1, and the value of ⁇ is Greater than 0 is less than or equal to 0.5.
  • Step 104 The AP sends an access permission frame to the accessible STA on the collision-free channel corresponding to the accessible STA.
  • the access permission frame includes an access resource allocated for the accessible STA and an adjusted backoff window.
  • the collision-free channel corresponding to the access STA is a channel that can access the STA to send an access request.
  • the accessable STA receives the channel measurement request frame sent by the AP, and according to the channel measurement request
  • the frame transmits a Channel Measurement (CM) frame upward to the AP on the K channels.
  • CM Channel Measurement
  • the AP obtains the access information of the accessible STA on the K channels according to the channel measurement frame sent by the accessible STA, and the access STA can access the STA.
  • the access information on each channel is specifically a channel coefficient of each channel of the accessible STA on K.
  • the channel coefficient is the amplitude gain and phase change of each subcarrier on each channel.
  • the channel measurement frame is defined according to a prescribed format, and the AP is configured according to the AP.
  • the received channel and the defined format measure the channel coefficients.
  • Step 305 The AP separately sends a contention control frame on the K channels.
  • step 307 is performed.
  • the AP determines that the number of received access request frames is less than a preset number, and the AP determines that the received access request frames are non-real-time.
  • the AP sends a contention control frame on all channels, so that the associated STA initiates a second round of access procedures.
  • the number of the access request frames is less than the preset number, the AP can identify fewer active STAs, and the amount of data requested to be sent is small. Therefore, the system resources cannot be fully utilized.
  • a new round of access procedures may have new STA access, which can make better use of system resources.
  • Step 401 The STA selects an access channel and an access backoff slot according to the K channels and the backoff window.
  • the STA After receiving the contention control frame, the STA determines whether the identity of the STA is in the identifier of the STA that the access request is successfully sent. If not, the STA updates the backoff window to the adjusted backoff window, and according to the adjusted backoff window to the AP. The access request frame is resent, and if not, the STA updates the backoff window to the adjusted backoff window.
  • the value of the backoff window is adjusted to Max ⁇ W/ ⁇ , W min ⁇ , where W min is the minimum value of the backoff window;
  • the sending module 22 is configured to: according to the access channel and the access backoff slot to the access point AP Sending an access request frame;
  • FIG. 10 is a schematic structural diagram of an AP according to Embodiment 7 of the present invention.
  • the AP 300 provided in this embodiment includes: a processor 31, a memory 32, a communication interface 33, and a system bus 34.
  • the communication interface 33 is connected to the processor 31 through the system bus 34 and completes communication with each other;
  • the memory 32 is configured to store computer execution instructions;
  • the communication interface 22 is configured to communicate with other devices.
  • the processor 31, used The computer executes the instructions to execute the method as described below.
  • the processor 31 adjusts the backoff window according to the number of the conflicting channels and the number of the idle channels, and specifically includes:

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

Abstract

L'invention concerne un procédé et un appareil d'accès multi-utilisateur en liaison montante. Une pluralité de stations (STA) peut envoyer simultanément des trames de demande d'accès à un point d'accès (AP) sur K canaux ; et l'AP reçoit les trames de demande d'accès sur les K canaux, ajuste la taille d'une fenêtre d'attente en fonction des résultats de réception sur les K canaux, porte la fenêtre d'attente ajustée dans une trame d'autorisation d'accès et une trame de diffusion et envoie celle-ci aux STA, de sorte que dans le cycle d'accès suivant, diverses STA obtiennent un accès en fonction de la fenêtre d'attente ajustée. Par comparaison à l'état de la technique, dans le procédé du présent mode de réalisation, le temps pour envoyer une trame de demande d'accès est raccourci par l'envoi des trames de demande d'accès en parallèle sur une pluralité de canaux, de sorte que le surdébit de protocole d'évaluation d'une STA accessible dans le processus de demande de permission est réduit, et l'apparition d'un conflit peut être évitée par ajustement de la taille d'une fenêtre d'attente.
PCT/CN2015/074604 2015-03-19 2015-03-19 Procédé et appareil d'accès multi-utilisateur en liaison montante WO2016145662A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/074604 WO2016145662A1 (fr) 2015-03-19 2015-03-19 Procédé et appareil d'accès multi-utilisateur en liaison montante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/074604 WO2016145662A1 (fr) 2015-03-19 2015-03-19 Procédé et appareil d'accès multi-utilisateur en liaison montante

Publications (1)

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WO2016145662A1 true WO2016145662A1 (fr) 2016-09-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108702691A (zh) * 2016-04-01 2018-10-23 华为技术有限公司 一种发送通信消息的方法和装置
CN114586300A (zh) * 2019-10-31 2022-06-03 华为技术有限公司 一种确定误帧率的方法以及相关装置

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US20050141547A1 (en) * 2003-12-31 2005-06-30 Samsung Electronics Co., Ltd. Wireless communication method adapting priority for transmitting packets in WPAN
US20090129353A1 (en) * 2007-11-16 2009-05-21 Sungkyunkwan University Foundation For Corporate Collaboration Method for recognizing available channel in ieee 802.15.4 protocol csma/ca mechanism
CN101977445A (zh) * 2010-10-13 2011-02-16 北京邮电大学 一种多信道csma接入方法
CN102413582A (zh) * 2012-01-06 2012-04-11 北京邮电大学 一种中心控制的802.11无线网络信道接入的方法
CN102656940A (zh) * 2009-12-15 2012-09-05 高通股份有限公司 在下行链路sdma操作之后的退避过程

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050141547A1 (en) * 2003-12-31 2005-06-30 Samsung Electronics Co., Ltd. Wireless communication method adapting priority for transmitting packets in WPAN
US20090129353A1 (en) * 2007-11-16 2009-05-21 Sungkyunkwan University Foundation For Corporate Collaboration Method for recognizing available channel in ieee 802.15.4 protocol csma/ca mechanism
CN102656940A (zh) * 2009-12-15 2012-09-05 高通股份有限公司 在下行链路sdma操作之后的退避过程
CN101977445A (zh) * 2010-10-13 2011-02-16 北京邮电大学 一种多信道csma接入方法
CN102413582A (zh) * 2012-01-06 2012-04-11 北京邮电大学 一种中心控制的802.11无线网络信道接入的方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108702691A (zh) * 2016-04-01 2018-10-23 华为技术有限公司 一种发送通信消息的方法和装置
CN108702691B (zh) * 2016-04-01 2020-12-01 华为技术有限公司 一种发送通信消息的方法和装置
US10887827B2 (en) 2016-04-01 2021-01-05 Huawei Technologies Co., Ltd. Communication message sending method and apparatus based on backoff duration
CN114586300A (zh) * 2019-10-31 2022-06-03 华为技术有限公司 一种确定误帧率的方法以及相关装置
CN114586300B (zh) * 2019-10-31 2024-06-11 华为技术有限公司 一种确定误帧率的方法以及相关装置

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