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Medium access method and service access point, station and system

A medium and multi-point access technology, applied in the direction of electrical components, wireless communication, etc., can solve the problem of low system access efficiency and achieve the effect of improving system access efficiency

Active Publication Date: 2014-12-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, when multiple STAs in the system need to communicate with the AP, the STAs have a higher probability of choosing the same backoff time, and the probability of collisions is higher, and since one STA is allowed to communicate with the AP at the same time, lead to low access efficiency of the system

Method used

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  • Medium access method and service access point, station and system
  • Medium access method and service access point, station and system
  • Medium access method and service access point, station and system

Examples

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Embodiment 1

[0087] With the application of wireless communication becoming more and more extensive, and there are more and more mobile terminals, the requirements for wireless access technology are also getting higher and higher. In order to improve the access efficiency of the system, this embodiment provides a medium access method, and the method provided by this embodiment is implemented from the perspective of an AP as an example, see figure 1 , the method flow provided by this embodiment is specifically as follows:

[0088] 101: Start the OFDMA phase based on the CSMA / CA mechanism, and send an OFDMA phase start indication to the OFDMA STA;

[0089] 102: Receive a contention access request sent by at least one OFDMA STA that initiates OFDMA access contention within the duration of the OFDMA phase;

[0090] 103: Configure channel resources for at least one OFDMA STA according to the contention access request, and notify at least one OFDMA STA of channel resource configuration informat...

Embodiment 2

[0097] The embodiment of the present invention provides a medium access method, which is suitable for realizing the OFDMA multiple access contention access mechanism under the coexistence of the CSMA / CA mechanism and the OFDMA mechanism after the system introduces the OFDMA mechanism.

[0098] In this embodiment, an application scenario in which one BSS (Basic Service Set, basic service set) consists of one AP and multiple STAs is taken as an example. Usually, in the traditional CSMA / CA mechanism, when APs and STAs in the BSS compete for the wireless medium (which can be called a contention channel), there is no priority division, which belongs to equal and fair competition. Compared with traditional APs, the APs involved in this embodiment have OFDMA access functions. The STAs involved in this embodiment are divided into STAs with OFDMA functions and STAs without OFDMA functions. For the convenience of description, the STAs with OFDMA functions will be STAs are called OFDMA S...

Embodiment 3

[0123] An embodiment of the present invention provides a medium access method. This embodiment is applicable to the introduction of the OFDMA mechanism into the system. In the case of the coexistence of the CSMA / CA mechanism and the OFDMA mechanism, a method for realizing the OFDMA multiple access contention access mechanism is proposed. Compared with traditional APs, the AP involved in this embodiment has an OFDMA access function. In this embodiment, the specific application scenario is the same as that of Embodiment 2, the difference is that in Embodiment 2, the channel is directly reserved after the AP competes, and in this embodiment, after the OFDMA STA successfully acquires the channel, the AP instructs to enter the OFDMA competition stage . see Figure 4 , the method flow provided by this embodiment includes:

[0124] 401: The OFDMA STA sends a channel competition request to the AP based on the CSMA / CA mechanism;

[0125] Specifically, when the OFDMA STA needs to co...

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Abstract

The invention discloses a medium access method and a service access point, station and system and belongs to the field of wireless communication. The method includes: starting an OFDMA stage on the basis of a CSMA / CA mechanism, and transmitting an OFDMA stage starting instruction to each OFDMA station STA; by an AP (access point), receiving a contention access request transmitted by at least one OFDMA STA which starts access contention in the OFDMA stage time period; configuring channel resources of at least one OFDMA STA according to the contention access request, and notifying the configuration information of the channel resources to the OFDMA STA so as to allow the OFDMA STA to perform medium access according to the configuration information. The method has the advantages that after an OFDMA multiple access contention access mechanism is introduced, OFDMA wireless medium resource multiple access contention access is achieved while the CSMA / CA mechanism and the OFDMA mechanism coexist, and system access efficiency is increased.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a medium access method, service access point, station and system. Background technique [0002] With the continuous increase of mobile terminals, wireless communication applications are becoming more and more extensive, and the requirements for wireless technology are also getting higher and higher. In a WLAN (Wireless Local Access Network, wireless local area network) system, there are multiple STAs (Stations, stations) and multiple APs (Access Points, service access points). When multiple STAs simultaneously request to communicate with the same AP When , there will be a conflict, so the media access technology is introduced to resolve this conflict. [0003] In the WLAN system, the CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance, Carrier Sense Multiple Access / Collision Avoidance) mechanism is used to realize the contention access of the wireless medium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W72/04
CPCH04W74/006H04W74/0816
Inventor 李靖李云波伍天宇
Owner HUAWEI TECH CO LTD
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