Local cooperation method in wireless multicasting

Abstract

The invention provides a local cooperation method in wireless multicasting. During multicasting to a user, a mobile base station is divided into four stages: a first stage: the mobile base station broadcasts a certain number of data packets to the user; a second stage: the idle non-multicasting user codes the received data packets in the network and then forwards the data packets to the multicasting user, and the multicasting user repairs the data packets first time by utilizing the forwarded data packets; a third stage: the user in the multicasting group retransmits the data packets in a cooperation manner, and the error packet list of the multicasting user is split by a network coding method to obtain a local retransmission strategy, and the local retransmission of the data packets is performed according to the strategy; and a fourth state: when receiving the report, the mobile base station judges whether the data packets are retransmitted or not according to the feedback of the user. By adopting the method, the retransmission request of the multicasting user to the mobile base station is reduced, the retransmission relay is reduced, the retransmission times are lowered, the retransmission efficiency is improved, the retransmission load of the mobile base station is lightened, the honeycomb link resource is saved, and the utilization rate of the wireless resource is improved.

Description

A Local Cooperative Method in Wireless Multicast technical field The invention relates to a method for local cooperation in wireless multicast, in particular to a method for repairing error packets by using information sharing of local users for the retransmission repair process in wireless multicast. Background technique With the rise of mobile multimedia services, wireless multicast is becoming an important wireless communication method. The evolution of the existing wireless multicast technology system is mainly reflected in the scheduling, optimization and improvement of the link between the mobile base station and the mobile users, without utilizing the local cooperation between the mobile users. Due to the increasing shortage of cellular frequency resources, the local cooperation of mobile users can save cellular link resources. When users are performing local cooperation, the mobile base station can use link resources in other aspects. The cooperation of mobile us...

AI Technical Summary

Problems solved by technology

Technical problem: the purpose of the present invention is to solve the efficiency problem of local cooperation in wireless multicast, aiming at the main problems of the existing general technology, to overcome the shortcomings of redundant local retransmission times and unused user cooperative relay

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