Stochastic access method based on user side cooperative grouping in collaboration cellular network

Abstract

A random access method based on the cooperation and the grouping of user ends of a collaborative cellular network comprises the following steps: the user end is determined as a cooperation group leader; each user end is accommodated by the cooperation group leader into a group to form a corresponding cooperation group; and each user end in the cooperation group sends a corresponding signal of request for base station access to a base station in an established cooperation mode. When the base station conducts the initial allocation of resources according to the detected signal of request for base station access, each user end in the cooperation group occupies a resource block initially allocated by the base station in sequence, and sends a concrete message of request for access to the base station independently. At last, the base station dispatches the resource blocks again to satisfy the actual operational requirements of each user end. Through the cooperation and the grouping of each user end during the random access process, the method can reduce the probability of collision and conflict between the user ends and reduce the energy consumption thereof, thus further improving the random access performance of the system.

Description

technical field [0001] The invention relates to a random access method based on user end cooperative grouping in a cooperative cellular network. Background technique [0002] The future wireless cellular communication system should be a system that can provide a higher data transmission rate and a larger cell coverage radius, which leads to the research of the next generation of wireless cellular communication technology, that is, the research of wireless relay networks. Adding a fixed relay station to the traditional cellular network or using the technology of cooperative transmission between users can greatly improve the throughput capacity and cell coverage of the system; The technology can not only obtain the cooperative diversity gain and improve the transmission bandwidth efficiency of the system, but also in terms of implementation, this technology of relaying through cooperation between users is more flexible than directly using fixed relay stations, so wireless coop...

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Problems solved by technology

However, these schemes require the base station to know the number of collided users, and the number of collided users is difficult to detect correctly in the actual implementation process.

[0004] At present, the research on random access schemes in wireless cooperative cellular networks focuses on user cooperative retransmission technology and collision detection methods, although the cooperation between users can further enhance the correctness after retransmission detection probability, but these methods are all expedient measures, and cannot fundamentally reduce the possibility of user-side collisions. Therefore, how to effectively solve the problem of user-side signal collisions in the prior art has become a problem for those skilled in the art. Technical issues to be solved urgently

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