Method for combining dynamic radio resource allocation and mobility load balancing in LTE system

Abstract

The invention provides a method for combining dynamic radio resource allocation and mobility load balancing in an LTE system. The optimization objective of the method is that the network resource efficiency is maximized under the limiting conditions of inter-cell interference and limited resources in cells. The feasible suboptimization scheme is that optimization is performed at two stages of resource allocation and load balancing. Firstly, a heuristic allocation algorithm based on a lagrangian multiplier method is utilized to allocate physical resource blocks and powers for all of users in a network at the resource allocation stage, the resource efficiencies of all of physical resource blocks in the network are obtained according to resource allocation results; secondly, users capable of maximizing the network resource efficiencies are selected and switched to corresponding target cells at the load balancing stage. By adopting the method, the network resource efficiencies can be maximized, and the system performance and the user experience are improved.

Description

technical field [0001] The invention relates to the field of algorithms for joint dynamic radio resource allocation and mobile load balancing in LTE Self-Organizing Networks (SON). Background technique [0002] The deployment of next-generation wireless communication networks faces two severe challenges: the increasing demand for wireless access and the manual configuration of a large number of network elements and related parameters under the coexistence of multiple heterogeneous networks. In order to solve this problem, the 3rd Generation Partnership Project (3GPP) introduced Orthogonal Frequency Division Multiple Access (OFDMA) technology and automatic Organizational Networks (Self-Organizing Networks, SON) technology to reduce human intervention in the network as much as possible while ensuring the quality of mobile services. The basic idea of ​​OFDMA is to disperse high-speed data streams to multiple orthogonal subcarriers for transmission, thereby greatly reducing the...

AI Technical Summary

Problems solved by technology

The impact of resource allocation schemes is rarely considered in the existing research on load balancing problems

In fact, it is far from enough to improve the user experience in the network only by load balancing, that is, selecting the appropriate edge users in the overloaded cell to switch to the adjacent cell

Because an unreasonable Radio Resource Mechanism (Radio Resource Mechanism, RRM) will lead to a decline in system resource efficiency, the scarce radio resources in the communication system will not be effectively utilized, thereby increasing the load of hotspot cells and dissatisfaction among them. amount of users

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