Mobility load balancing method based on AHP (Analytical Hierarchy Process) in LTE system

Abstract

The invention discloses a mobility load balancing method based on an AHP (Analytical Hierarchy Process) in an LTE system. The method mainly comprises the steps of selection of an optimal load transfer cell and determination of optimal CIO (Cell Independent Offset) parameters. According to the method, four modules namely a cell state detection module (1), a user-cell matching pair generation module (2), a load distribution module (3) and a balancing module (4) are adopted, wherein the cell state detection module is mainly used for judging a cell load state and initiating load balancing if a cell is overloaded; the user-cell matching pair generation module is mainly used for selecting an optimal transfer cell of a user through an AHP algorithm; the load distribution module is mainly used for pre-distributing the load quantities of the overloaded part of the overloaded cell to each target cell before the CIO parameters are adjusted; the load of each target cell is smaller, the distributed load quantities are larger; the balancing module is mainly used for adjusting the CIO through a variable step; when each target cell completely receives the distributed load quantities, the optimal CIO of the cell is obtained.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a mobile load balancing method based on hierarchical analysis in an LTE (Long Term Evolution, long-term evolution) system. Background technique [0002] The 3GPP LTE system uses key technologies such as OFDM and MIMO to achieve higher data rates, throughput and spectral efficiency. However, with the increasing number of users and business data, some hotspot cells are heavily loaded, resulting in a high call drop rate and degrading user experience; while other adjacent idle cells are lightly loaded and resources cannot be fully utilized. Therefore, how to implement load balancing in the network is an increasingly urgent problem to be solved. The load balancing in the original GSM system mainly relies on observation to find base stations that have been overloaded for a long time, and adjust related parameters to achieve the goal of balancing. But this method of manua...

AI Technical Summary

Problems solved by technology

When they select the target cell, they generally only consider the load of the target cell or the single factor of the reference signal received power RSRP, and the cell selected in this way is likely to cause ping-pong handover or handover failure, because the target cell with a large RSRP or a light load, the channel conditions are not necessarily good

In addition, when adjusting the mobility parameters to achieve balance, only from the perspective of the overloaded cell, the load of the overloaded cell is reduced below the predefined threshold, and the unloading is completed, without considering the ability of each target cell to receive the load

In addition, there is no specific adjustment method for how to adjust the CIO

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