Regional load balancing method in cellular mobile communication system

Abstract

The invention discloses a regional load balancing method in a cellular mobile communication system, mainly solving the limitation problem that only single cell pair is considered in load balancing behaviour in an advanced international mobile telecommunication system (IMT-Advanced system). The method is mainly characterized in that 1, a load balancing scene is expanded to a region formed by multiple cells from a single cell pair; 2, through constructing a utility function, each cell in the load balancing region carries out load balancing by taking utility value maximization as a target; and 3, CIO (cell individual offset) of the cell relative to a specific adjacent cell is changed to realize switching and load transferring of a user. The regional load balancing method disclosed by the invention accords with the distributed characteristic of self-organized network architecture of the IMT-Advanced system; since a multi-cell linkage policy is adopted, system average blocking rate is effectively reduced, service quality of the users in the system and load balancing convergence rate are improved, and oscillation problem of regional load balancing is avoided.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to the cell load balancing in the advanced international mobile communication IMT-Advanced system architecture, specifically, multiple cells in an area perform load balancing at the same time, which can be used to balance the load in the communication system. Background technique [0002] The 3rd Generation Partnership Project 3GPP Long Term Evolution system can provide users with richer multimedia services with its higher bandwidth, but operators are most concerned about obtaining higher profits through effective control of operation and maintenance costs . Therefore, controlling the cost of operation and maintenance in LTE systems will become a very challenging problem. The 3GPP proposes a new operation and maintenance strategy for the long-term evolution system, that is, the long-term evolution system operator can effectively reduce the operation and maintenance cos...

AI Technical Summary

Problems solved by technology

[0002] The 3rd Generation Partnership Project 3GPP Long Term Evolution system can provide users with richer multimedia services with its higher bandwidth, but operators are most concerned about obtaining higher profits through effective control of operation and maintenance costs

After the end of this load balancing, only the load of cell 7 is reduced, but the load of cell 12 and cell 13 is not reduced. After a period of time, cell 12 and cell 13 will also trigger MLB, resulting in figure 1 The number of load balancing in the shown area increases, and cell 12 may choose cell 7 for load balancing, which will cause the load of cell 7 to increase again, and cell 7 will soon trigger MLB again, forming a shock

[0006] To sum up, the existing load balancing has the following disadvantages: First, each load balancing only considers a single cell pair, which cannot reduce the load of other cells, resulting in an increase in the number of load balancing in the area; A cell triggers load balancing too many times, which affects the quality of service of users in the area and the improvement of system performance

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