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Method and device for acquiring and sending data by sta in wireless local area network

A wireless local area network and data technology, applied in the field of communication, can solve the problems of inability to obtain downlink data correctly, inability to handle data packet retransmission, lack of processing mechanism, etc.

Active Publication Date: 2017-11-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing technical solution provides a scattered PS-Poll competition method, when the STA cannot successfully receive the downlink data within the divided time period, it lacks a corresponding processing mechanism. In addition, when the uplink data transmission based on time slot division When unsuccessful, the existing algorithm cannot handle the problem of packet retransmission
Therefore, when the PS-Poll is lost or wrong, the ACK of the PS-Poll confirmation frame is lost or wrong, or the DATA sent by the AP is lost or wrong, the STA cannot correctly obtain the downlink data or send the uplink data

Method used

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  • Method and device for acquiring and sending data by sta in wireless local area network
  • Method and device for acquiring and sending data by sta in wireless local area network
  • Method and device for acquiring and sending data by sta in wireless local area network

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Embodiment 2

[0043] Embodiment 2, the embodiment of the present invention further provides an embodiment of a device for realizing each step and method in the above method embodiment. Embodiments of the present invention can be applied to various communication systems, especially can be adapted to such as figure 1 In the shown network system, for example, it may be a user equipment or STA. Image 6 shows a structural diagram of a user equipment, according to Image 6, the user equipment 10 includes: a processing unit 101 , a memory 102 and an antenna 103 . The processing unit 101 controls the operation of the user equipment 10, and the processing unit 101 may also be referred to as a CPU. The memory 102 may include read-only memory and random-access memory for providing instructions and data to the processing unit 101 . A portion of memory 102 may also include non-volatile random access memory (NVRAM). In a specific application, the user equipment 10 may be embedded or itself may be a ...

Embodiment 3

[0054] Embodiment 3, the embodiment of the present invention provides a data acquisition device for acquiring data from an access point AP in a wireless local area network, such as Figure 7 As shown, the device includes: a first transceiver unit 710, a second transceiver unit 720;

[0055] Wherein, the first transceiving unit 710 is configured to, after learning that the AP has its downlink data according to the received beacon, send PS in the reserved period within the current beacon interval according to the TIM contained in the beacon. -Poll, Trigger or the uplink data DATA sent by the STA and receive the downlink data returned by the AP after receiving the PS-Poll, Trigger or the uplink data DATA sent by the STA;

[0056] Specifically, after receiving the Beacon, if the identifier corresponding to the data acquisition device 70 in the TIM contained in the current Beacon is 1, the first transceiver unit 710 sends the PS-Poll in the first time slot specified in the reserved...

Embodiment 4

[0066] Embodiment 4, the embodiment of the present invention also provides a method for sending data by STA in the wireless local area network, which is used for the STA in the wireless local area network to send uplink data to the AP it accesses. Figure 8 Shown is a flowchart of a method for obtaining data by a STA in a wireless local area network provided by an embodiment of the present invention, according to Figure 8 , the method includes:

[0067] Step 801, the STA receives the beacon sent by the AP, and sends the uplink data packet in the corresponding time slot in the reserved period indicated in the beacon; the time slot is the time slot in the reserved period in the current beacon interval a period of time;

[0068] Step 802, when the STA cannot successfully send the uplink data packet in the specified time slot in the reserved period, if the number of retransmissions of the data packet has not reached the maximum number of retransmissions, the STA After the reser...

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Abstract

The embodiment of the invention provides a channel competition method applied to a wireless local area network. The method comprises the steps that an STA sends PS-Poll, or Trigger or uplink data based on a competition mechanism and stops sending PS-Poll, or Trigger or uplink data not sent successfully yet when a time slot ends, the current competition mechanism state is frozen till competition is continued based on the frozen competition mechanism in the current competition period or later competition period, and then the STA continues to send the PS-Poll, or Trigger or uplink data not sent successfully. Correspondingly, the embodiment of the invention provides a channel competition device. By the adoption of the technical scheme, a competition period is allowed to recover to the previous competition state quickly, and therefore energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and a device for acquiring and sending data by a STA in a wireless local area network. Background technique [0002] In WLAN (Wireless Local Area Networks, wireless local area network), because STA (Station, wireless station) is usually powered by batteries, energy is limited, according to the MAC (Medium Access Control, media access control) layer specification defined by IEEE802.11, AP (Access Point, access point) periodically broadcasts Beacon (beacon) according to BI (Beacon Interval, beacon interval), and STA working in power saving mode wakes up periodically and receives beacons, where beacons are used A management frame that notifies STA of some specific information. The beacon contains a data structure TIM (TrafficIndication Map, transmission indication mapping), which is used to inform STA whether its data frame is cached in the AP; TIM itself is composed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16H04W74/08
CPCY02D30/70
Inventor 杨浔甄斌赵牧姜艳平
Owner HUAWEI TECH CO LTD