Adaptive collaborative transmission method for backhaul links of wireless relay

Abstract

The invention relates to an adaptive collaborative transmission method for backhaul links of a wireless relay. When a plurality of users access a base station through the wireless relay, if the resource occupation of the backhaul links exceeds a preset threshold, the relay carries out network coding processing on partial direct information of users and partial forwarded information of the users, then, sends the information to the base station by adopting single wireless resources, so that the resource occupation of the backhaul links is reduced at the same that the number of target users of relay service is increased, and the transmission performance of a wireless relay system is improved; and the base station further carries out centralized scheduling on users who adopt the network coding processing, and detects and recovers received network coding mixed information and direct information from the users, and the diversity gain can be obtained without increasing additional system overhead. With the adoption of the method, the problem that the resources of the backhaul links of a new-generation broadband mobile communication system are limited is solved, the wireless relay is ensured to be capable of expanding coverage and reducing the decrease of the spectrum efficiency caused by the introduction of the relay.

Description

technical field [0001] The present invention relates to a transmission method of wireless relay communication, to be precise, relates to an adaptive cooperative transmission method of a wireless relay backhaul link based on network coding, and belongs to the technical field of wireless relay transmission in broadband wireless communication . Background technique [0002] The future mobile communication system will be committed to enabling convenient communication between anyone and anything at any time and any place, and providing high-speed data services to as many users as possible within the coverage of the entire network, and reducing The user's transmission delay; and this will undoubtedly bring huge challenges to the existing communication technology and network architecture. Therefore, it is necessary to introduce new advanced communication technologies on the basis of the existing network architecture and communication schemes to further increase the transmission ra...

AI Technical Summary

Problems solved by technology

However, almost all the research results have not considered the combination with the characteristics of the current IMT-Advanced system, that is, in the actual system protocol, the resources allocated to the access link and the backhaul link are fixed and network coded The use needs to be determined adaptively according to the resource overhead of the backhaul link

At the same time, the base station needs to combine the direct transmission information and the mixed information after network coding processing to recover the target signal. This will increase the complexity of the receiving end, and at the same time, due to various factors such as multi-path transmission and synchronization, the bit error of transmission will increase. Rate

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