Method for achieving UE random access of user equipment and system

Abstract

The invention discloses a method for achieving UE (user equipment) random access of user equipment and a system. The method is applicable to the network scene of a macro base station and a micro base station which share IDs of cells. The method comprises the following steps: the UE obtains time-frequency synchronous downlink according to monitored information of a cell broadcast system and determines the strongest frequency position; when the strongest frequency position is determined to be in a micro cell, the random access process is accomplished through information interaction with the micro base station for providing service to the micro cell; and when the strongest frequency position is determined to be in a macro cell, the random access process can be accomplished through information interaction with the macro base station for providing service to the macro cell. According to the technical scheme provided by the invention, the base station for providing service to the strongest frequency position is preferentially in charge of the UE random access in a coverage area, so that the problem of long time delay during treatment since both the macro base station and the micro base station participate at the same time due to the adoption the conventional random access technique can be solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for realizing random access of user equipment UE. Background technique [0002] In the future heterogeneous wireless network, there is generally a macro base station with a large coverage area, and there are multiple micro base stations with a small coverage area, located within the coverage area of ​​the macro base station, to fill the blind spot for the macro base station or further improve the transmission quality , to improve user experience. In this kind of network deployment, there are two options: one is that the macro base station and the micro base station have their own distinctive cell IDs, so that each micro base station builds its own cell; the other is that the macro base station Sharing the same cell ID with the micro base station, under this deployment, the interference problem between different cells and the problem of frequent handover can ...

AI Technical Summary

Problems solved by technology

However, at this time, for the uplink, it is a single macro base station and multiple micro base stations, and the transmit power of the UE is aimed at the combined effect, so it is impossible to accurately determine the uplink transmit power for a specific macro base station or micro base station , and since the signaling interaction between the UE and the base station in the random access process has a certain time limit, if the macro base station and the micro base station jointly process the random access of the UE, it may cause a large The processing delay, which affects the entire random access process, may make the UE mistakenly believe that due to the limitation of network capacity, it cannot complete the random access process.

It can be seen that in the macro base station-micro base station scenario where the cell ID is shared, the performance of the traditional random access process will be seriously affected

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