Optimization method for load balancing actively initiated by light load cell

Abstract

The invention discloses an optimization method for load balancing actively initiated by a light load cell. According to the invention, all cells exchange respective load information in advance; when load balancing is to be carried out, the optimization method comprises the following steps that: S1, when a load of an arbitrary cell i among all cells is less than a cell light load threshold and is the smallest one compared with loads of neighboring cells, the cell i determines a to-be-adjusted cell according to load information of neighboring cells and sends a user enquiry request to the to-be-adjusted cell; the to-be-adjusted cell checks channel quality indicators of the present cell users according to the request, determines candidate target users, and sends information of the users back to the cell i; S2, the cell i queries the candidate target users in sequence and determines a target user; the cell i estimates a load which is caused after the user is switched to the cell i; and S3, the cell i determines whether the cell i is overloaded; if not, the cell i sends a user equipment ID of the target user to the cell that the user belongs to, and the cell switches out the user and S2 is executed; if so, the cell i stops the selection of the target user.

Description

technical field [0001] The invention relates to the technical field of 3GPP long-term evolution (LTE), in particular to a load balancing optimization method actively initiated by a light-loaded cell. Background technique [0002] 3GPP Long Term Evolution (LTE) technology is regarded as "quasi-4G" and is regarded as the mainstream technology for the evolution from 3G to 4G. The LTE evolved network consists of three parts, including Evolved Radio Access Network (E-UTRAN), Evolved Packet Core (EPC) and User Equipment (UE). The evolved radio access network consists of several evolved base stations (eNBs), and the evolved packet core network includes a mobility management entity (MME) and a serving gateway (S-GW). MME is used to provide mobility management and control plane functions for user equipment, while S-GW implements user plane functions and provides an anchor point for local mobility. [0003] With the flat development of the evolved network architecture, the operation...

AI Technical Summary

Problems solved by technology

[0005] Although the above method can improve the quality of the mobile communication network to a certain extent, it mainly drives and completes load balancing at the overloaded eNB side, during which additional signaling overhead may increase the burden on the overloaded eNB; secondly, the overloaded eNB controls the load balancing process, The following problems will occur: after the users of the overloaded cell are transferred to a surrounding light-loaded cell, this light-loaded cell may also receive users from other adjacent overloaded cells. The cells in the network cannot cooperate to optimize the performance of the entire network. At the same time, it will also cause the problem that users in the overloaded cell will switch multiple times in a short period of time, resulting in ineffective load balancing.

[0006] To sum up, when the existing technology implements load balancing between adjacent cells, there are problems such as additional signaling overhead that increases the burden on overloaded eNBs, poor coordination between cells in the entire network, and poor load balancing effectiveness.

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