Uplink multi-user-side random access method and device based on multiple pilot frequencies

Abstract

The invention provides an uplink multi-user-side random access method and device based on multiple pilot frequencies, and relates to the technical field of wireless communication. The method comprises the steps that a base station periodically broadcasts SIB2; after receiving the SIB2, the user side randomly selects a preset number of pilot frequencies from the pilot frequency sequence set, and based on the random access configuration information, the user side can send the preset number of pilot frequencies to the base station on the same time-frequency resource or can respectively send the pilot frequencies to the base station on corresponding continuous time-frequency resources; the base station detects a plurality of pilot frequency sequences sent by the user side, generates corresponding random access response information according to each pilot frequency sequence, and sends the random access response information to the user side; after receiving the random access response information, the user side sends a random access signaling MSG3 message to the base station based on the random access response information; and the base station receives and detects the MSG3 message sent by the user side to complete the random access of the user side. By adopting the invention, the collision probability of the user side can be reduced, and the access success rate of the user side is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for uplink multi-user terminal random access based on multiple pilots. Background technique [0002] Random access is the first step for the UE to establish an uplink communication connection with the base station. Its main purpose is twofold: one is to establish an uplink synchronization relationship with the base station; the other is to request the base station to allocate uplink resources for data transmission. The traditional contention-based access scheme means that the user terminal randomly selects a pilot sequence from the pilot sequence set and sends it to the base station. When multiple user terminals select the same pilot sequence and a pilot collision occurs, the base station centrally resolves the pilot collision question. The goal of traditional schemes is to minimize the probability of pilot collision, thereby increasing...

AI Technical Summary

Problems solved by technology

However, physical random access channel resources are limited. When a large number of devices initiate random access requests to the base station almost simultaneously, it will cause serious access congestion and high access delay, which will affect the overall throughput performance of the network; at the same time The client that fails to access may initiate an access request again, which will make the access network more congested and unable to meet the quality of service requirements of the client

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