Receding method based on physical layer channel quality estimation constraint

Abstract

The invention discloses a receding method based on physical layer channel quality estimation constraint, and relates to an MAC layer receding method which is based on the physical layer channel quality estimation constraint and suitable for being used on the premise of MPSK modulation. The significance of the receding method is to provide a capacity for a wireless local area network system, and the capacity includes obtaining channel quality information between receiving nodes and sending nodes in real time through training data by the utilization of a network physical layer, handing over the channel quality information to an MAC layer, moreover, duly adjusting receding parameters and modifying values of a receding counter through the channel quality information, and thereby providing appropriate competition channels for the nodes. An OFDM system blind equalization technology of a PHY layer is used for obtaining channel quality estimation criterions, then the criterions are applied to the receding method, and the receding method finally achieves protection of high-quality channel data flows.

Description

technical field [0001] The invention belongs to the field of wireless local area network communication, and specifically refers to a back-off method based on physical layer channel quality estimation constraints. Background technique [0002] The development of informatization in modern society has led to a large increase in high-speed and high-quality data transmission services, and the requirements for transmission system capacity have increased. Modern wireless local area network has the advantages of convenient installation, flexible use, and low cost, and is widely used. However, due to the limited spectrum of wireless channels, selective fading of channels, and random competition mechanism for channel access, wireless local area networks cannot be like wired Ethernet. So much to offer. The backoff mechanism is a specific contention solution used in the wireless node Media Access Control (MAC) protocol. It determines the backoff time that a node needs to experience eac...

AI Technical Summary

Problems solved by technology

However, the communication environment in the wireless network is relatively complex. The data packets sent by the station may fail to send data frames due to poor wireless channel conditions, or may cause data transmission failures due to collisions, resulting in unnecessary backoffs.

The existing conventional protocol backoff algorithms do not take into account the quality of the wireless channel, but directly judge that "the ACK of the corresponding data packet has not been received" is caused by a collision. This kind of judgment is limited and arbitrary, which makes the backoff algorithm low efficiency

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