WLAN date retransmission method, equipment and system

A wireless local area network and data retransmission technology, applied in the field of data retransmission, can solve the problems of data collision, increase the number of frame exchanges and channel access times, and decrease the channel utilization rate, so as to reduce the probability of collision and improve the utilization rate Effect

Active Publication Date: 2013-08-14
ZTE CORP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the STA detects that the channel is busy after sending the SIFS of the data frame, it does not parse the data frame sent by the AP. Therefore, when it detects that the channel is idle in the PIFS, it will retransmit the data frame to the AP at the PIFS boundary; When the AP sends a data frame to the STA, it detects that the channel is idle in the PIFS, and it will also i

Method used

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  • WLAN date retransmission method, equipment and system
  • WLAN date retransmission method, equipment and system
  • WLAN date retransmission method, equipment and system

Examples

Experimental program
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Embodiment 1

[0065] In this implementation, the sender is the STA, and the receiver is the AP.

[0066] After the STA competes for the channel, it can use a short frame, such as a request to send (RTS, Request To Send) frame / clear to send (CTS, Clear To Send) frame to reserve a channel, and then use the data frame as the initial frame of the Speed ​​frame exchange, And send the data frame to the AP; wherein, in the data frame as the initial frame, the start of the Speed ​​frame exchange is indicated by ACK Indication, and the data frame as the initial frame includes a frame confirmation method for indicating the AP frame Specifically, the indication information for indicating the frame acknowledgment mode of the AP indicates the frame acknowledgment mode of the AP through the ACK Indication of the data frame that is the initial frame.

[0067] When the ACK Indication indicates that the frame acknowledgment mode of the AP is an ACK frame, if Figure 4 As shown, for the STA, if it detects t...

Embodiment 2

[0071] In this implementation, the sender is the STA, and the receiver is the AP.

[0072] After the STA competes for the channel, use the data frame as the initial frame of the Speed ​​frame exchange, and indicate the start of the Speed ​​frame exchange through the 1-bit information of the MAC frame header of the data frame as the initial frame of the initial frame, and send to the AP The data frame; wherein, the data frame as the initial frame includes indication information for indicating the AP frame confirmation mode, specifically, the indication information for indicating the AP frame confirmation mode is passed through the as More than one bit information of the data frame of the initial frame indicates the frame acknowledgment mode of the AP; further, the indication information used to indicate the frame acknowledgment mode of the AP can pass through the physical frame header of the data frame as the initial frame And / or more than one bit information in the MAC frame h...

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Abstract

The invention discloses a WLAN (Wireless Local Area Network) date retransmission method. The method comprises the following steps: after sending out wireless frames, a sender judges whether PIFS (Point coordination function Interframe Space) retransmission is needed according to the indication information, used for indicating the frame acknowledgment mode for a receiver, of the wireless frames and the detection result of an information channel through which the wireless frames are sent out; and performing PIFS retransmission after determining that PIFS retransmission is needed. The invention further discloses WLAN date retransmission equipment and a WLAN date retransmission system. Through the adoption of the method, the equipment and the system provided by the invention, the probability of collision in date retransmission in quick frame exchange is effectively reduced, and further the utilization ratio of the information channel is improved.

Description

technical field [0001] The present invention relates to wireless local area network (WLAN, Wireless Local Area Networks) technology, in particular to a method, device and system for data retransmission in WLAN. Background technique [0002] At present, in the wireless network field, WLAN is developing rapidly, and the application demand for WLAN is increasing day by day. For WLAN technology, the Institute of Electrical and Electronics Engineers industry standard IEEE802.11 group has defined a series of standards such as 802.11a, 802.11b, and 802.11g. Improved specification. Among them, the 802.11ah task group mainly formulates WLAN network air interface standards using license-free frequency bands below 1 GHz to support new network applications such as smart grids and sensor networks. [0003] The basic architecture of WLAN refers to a basic service set (BSS, Basic Service Set), and a BSS includes: an access point (AP, Access Point) and multiple stations (STA, Station) ass...

Claims

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Application Information

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IPC IPC(8): H04L1/08H04W84/12
Inventor 韩志强邢卫民吕开颖孙波田开波
Owner ZTE CORP
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