Collaborative load balancing method of wireless access network system based on RAN (Residential Access Network) framework

Abstract

The invention discloses a collaborative load balancing method of a wireless access network system based on a RAN (Residential Access Network) framework and relates to a load balancing method applied to the wireless access network system of the RAN framework. Cooperative communication among RRUs (Remote Radio Units) with low expense, low time delay and low complexity is realized by sufficiently utilizing a virtual real-time technology in the wireless access network system of the RAN framework; and scare spectrum resources are exchanged by space diversity generated by cooperation. According to the collaborative load balancing method disclosed in the wireless access network of the RAN framework, a ping-pong effect in the conventional load balancing method is effectively solved, and excessive load of part of the RRUs is avoided. During a process of balancing the load in the system, diversity gain is obtained through the cooperation of a plurality of RRUs, and the scare spectrum resources are exchanged by the space diversity obtained by cooperation, so that the utilization rate of the wireless resources and the performances of the system are effectively improved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a cooperative load balancing method applied to a radio access network system with a RAN (Radio Access Network) architecture. Background technique [0002] In a mobile communication system, the number of users and service types that each cell needs to carry are randomly and unevenly distributed, making the load in the entire system in an unbalanced state. Therefore, load balancing is one of the problems that mobile communication systems must face. The traditional load balancing method is to balance the load status among cells by switching users or reselecting cells. In a long-term evolution (Long Term Evolution, LTE) system, the purpose of load balancing is often achieved through operations such as switching. Such as figure 1 As shown, the load balancing process in the LTE system is as follows: the network detects the load situation, and judges whether load balanci...

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Problems solved by technology

[0004] The problem to be solved by the present invention is: in the wireless access network system with traditional architecture, load balancing will be accompanied by the ping-pong effect, which seriously wastes wireless resources, and at the same time cannot guarantee the communication quality of edge users; while base station cooperation can effectively solve the problem of cell However, the implementation of base station cooperation requires a large wireless backhaul overhead, and it is difficult to achieve precise radio frequency synchronization

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