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Frame check mechanism for improving wireless communication efficiency

A frame check and data frame technology, applied in the direction of error prevention/detection using the return channel, can solve the problem of reducing wireless transmission throughput, achieve the effect of improving wireless communication efficiency, ensuring reliability, and reducing communication time

Active Publication Date: 2014-06-18
SHANGHAI JIAO TONG UNIV
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  • Application Information

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Problems solved by technology

[0018] The purpose of the present invention is, on the basis of not changing the effective data length of the data packet, aiming at the problem that the traditional packet verification and retransmission mechanism reduces the wireless transmission throughput, a new frame verification mechanism is proposed, such as figure 2 As shown, for each communication cycle, the transmitter consists of:

Method used

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  • Frame check mechanism for improving wireless communication efficiency
  • Frame check mechanism for improving wireless communication efficiency
  • Frame check mechanism for improving wireless communication efficiency

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Embodiment Construction

[0064] The present invention will be further described below in conjunction with accompanying drawing. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0065] Get the data according to the marked array and send it to the application layer,

[0066] Store the verification result into the flag array of the out-of-order correction module, and store the M data packets in the data frame into the cache of the out-of-order correction module

[0067] Step 2: The transmitter encapsulates the data to be sent according to the structure of the information data packet, adds information such as the packet sequence number, modulates it in turn, and stores it in the sending queue. When sending for the first time, the transmitter directly takes M data packets from the sending qu...

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Abstract

The invention provides a frame check mechanism for improving wireless communication efficiency. The frame check retransmission mechanism aims to solve the problem that wireless communication efficiency is lowered by a traditional package check retransmission method. A transmitter sends a data frame including a plurality of data packages, a receiver checks the received data packages one by one, uniformly responds to the data frame and keeps the transmitter informed of whether each data package is correctly received or not, and the transmitter determines data retransmitted in the next data frame and data sent latest according to response information. The frame check mechanism guarantees data transmission reliability and can reduce communication time spent in responses, thereby greatly improving wireless communication efficiency; in order to solve the problem that data packages arrive out of order brought by the frame check mechanism, an out-of-order correction module is additionally arranged in the receiver, and through an annular cache access mechanism of the out-of-order correction module, it is guaranteed that the data packages are provided for an application layer according to a correct order.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a new check retransmission mechanism to ensure the reliability of wireless transmission and improve the efficiency of wireless communication. Background technique [0002] Due to noise, channel fading, interference and other factors in wireless transmission, the reliability of wireless links is difficult to guarantee. In order to ensure the reliability of data transmission, check retransmission is a common mechanism in the current wireless communication field. [0003] Existing wireless communication protocols such as 802.15.4 and 802.11 adopt the idea of ​​traditional packet verification, such as figure 1 As shown, for each communication cycle, the transmitter consists of: [0004] A switch delay from receiving state to transmitting state; [0005] B packet transmission time; [0006] C Transmitting state to receiving state switching delay; [0007] Dwaiting time; [...

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Application Information

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IPC IPC(8): H04L1/16
Inventor 陈彩莲李立安王易因关新平
Owner SHANGHAI JIAO TONG UNIV
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