Switchover optimization method suitable for target base station in heterogeneous network

Abstract

The invention discloses a switchover optimization method suitable for a target base station in a heterogeneous network. The switchover optimization method mainly comprises two steps: optimization selection of the target switchover base station is performed, an efficient cost function is introduced to conduct check computation on the cost needed by a user to access to a certain base station at a certain moment, system characteristics, the demand of the user, a UE state and other conditions can be met, meanwhile a weight factor in the cost function can be dynamically adjusted, and even the definition of the cost function can be modified to enable the cost function to be well capable of adapting to a complex and volatile environment in the heterogeneous wireless network and to meet the diversified and personalized service demands of the user; maximum speed is additionally set for a system according to a home base station so as to limit an MSL threshold value so that the system can effectively prevent a high-speed UE from initiating switchover to the home base station and reduce call drop rate. By means of the switchover optimization method, a switchover mechanism of the heterogeneous network is optimized in a targeted mode, and accordingly the stability and reliability of a switchover system are stably improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an optimal selection algorithm of a target switching base station in a heterogeneous network and an admission judgment mechanism of a home base station. Background technique [0002] Communication technology has entered the era of large-scale commercial use of 4G, and the development of both TD-LTE and FDD-LTE technologies has been quite mature. However, frequency resources are limited, leading to the transition of communication systems to higher frequency bands. Because electromagnetic waves are attenuated to varying degrees when they pass through walls or doors and windows with metal coatings, especially electromagnetic waves with frequencies above 2 GHz, the attenuation is greater when passing through building walls, and the networks of modern communication systems basically work at 2 GHz or more In the high frequency band, this brings about the pro...

AI Technical Summary

Problems solved by technology

In terms of handover selection of the target base station, relevant researches mainly focus on hard decision mechanisms with low complexity. Although it can achieve good performance under specific network conditions and business requirements, these hard decision strategies are ignored Due to the dynamic changes of the system status in the heterogeneous wireless network, as well as the differences in service requirements and UE status of different users, it is impossible to meet the personalized service needs of the UE under the dynamically changing system conditions.

On the other hand, relevant research has not targeted optimization of the access mechanism of femtocells in heterogeneous networks

Therefore, in the process of users roaming between heterogeneous networks, huge fluctuations in QoS levels may occur, resulting in interruption of communication connections

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