Channel access method of broadband high-speed radio station

Abstract

The invention discloses a channel access method for a broadband high-speed radio station. The channel access method comprises the following steps of: selecting a handshaking and data confirmation mode to send data during a CSMA channel access process, and cascading according to the same data target and the same confirmation mode; when handshaking is failed, retreating with regard to the data target of this time, and re-cascading the cached cascaded upper-layer data packets; when handshaking is successful, delivering the cascaded data to a physical layer to send, and after the data is sent, waiting for receiving an ACK frame, judging the correctness of each piece of time slot data in the ACK frame after receiving the ACK frame, if wrong error exists, retreating according to the number of the cascaded upper-layer data packets, conveying the upper-layer data packets corresponding to wrong data time slots in a cascading queue to re-cascade during retreating, and deleting the upper-layer data packets corresponding to correct data time slots. The channel access method disclosed by the invention is capable of reducing a retransmission data volume, and retreating by self-adapting to upper-layer data packet transmission efficiency.

Description

technical field [0001] The invention relates to a channel access method, in particular to a channel access method of a broadband high-speed radio station. It belongs to the technical field of wireless communication. Background technique [0002] In the current wireless broadband access, due to the existence of hidden nodes and exposed nodes, the broadband access process is more complicated than wired access. Therefore, access efficiency is particularly important in wireless broadband access. In order to To maximize the access efficiency and ensure the QoS of upper-layer data service transmission, it is necessary to optimize the access-related protocols in the link layer to the greatest extent. Most of the existing access protocols cannot well combine the processes of sending, cascading, and retransmitting upper-layer data packets. When retransmitting, the concatenated data packets of the entire link layer are simply retransmitted, and in the calculation of backoff It does ...

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Problems solved by technology

[0002] In the current wireless broadband access, due to the existence of hidden nodes and exposed nodes, the broadband access process is more complicated than wired access. Therefore, access efficiency is particularly important in wireless broadband access. In order to To maximize the access efficiency and ensure the QoS of the upper-layer data service transmission, it is necessary to optimize the access-related protocols in the link layer to the greatest extent.

Most of the existing access protocols cannot well combine the processes of sending, cascading, and retransmitting upper-layer data packets. When retransmitting, the concatenated data packets of the entire link layer are simply retransmitted, and in the calculation of backoff It does not consider the real-time requirements of the upper-layer data packets, so in practical applications, when encountering an application environment with fluctuating channel quality, the transmission efficiency of its data services will fluctuate greatly

[0003] In addition, Ad Hoc networks are often faced with variable channel quality and variable types of upper-layer services in practical applications. Therefore, the access efficiency and data transmission in the network will fluctuate greatly due to the above factors, and the amount of data is repeatedly transmitted. serious problem

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