Method and equipment for acquiring secondary timing advance

Abstract

The embodiment of the invention provides a method and equipment for acquiring secondary timing advance. The method comprises the following steps that: a terminal initiates a random access process if an secondary time alignment timer (TAT) of a secondary cell does not run after a secondary cell activation command is received, or after the secondary cell is activated, wherein the secondary timing advance (TA) of the secondary cell is different from primary TA of a primary cell; and the terminal acquires the secondary TA according to TA received in the random access process. Through adoption of the method and the equipment for acquiring the secondary timing advance provided by the embodiment of the invention, the terminal initiates the random access process after the secondary cell activation command sent by a base station is received or after the secondary cell is activated in order to acquire the secondary timing advance, so that the signaling overhead and system resources are saved.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a method and equipment for obtaining an auxiliary timing advance. Background technique [0002] Long Term Evolution (LTE) is a next-generation wireless communication standard that is being developed by the 3rd Generation Partnership Project (3GPP). It has high spectrum utilization and transmission speed, and low transmission. Advantages such as time delay. The terminal of the LTE system realizes the synchronization of uplink transmission and the base station through the timing advance (Timing Advance; TA), and maintains the uplink synchronization through the time alignment timer (Time Alignment Timer; TAT). The introduction of TA enables the uplink transmission of all terminals to be reached at the time expected by the base station, thereby avoiding uplink transmission conflicts between terminals and realizing time division multiplexing. [0003] In order to provide...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, after the auxiliary cell is configured, if the auxiliary cell does not continue to use the existing TA of the main cell, the terminal initiates random access in the auxiliary cell to obtain the auxiliary TA of the auxiliary cell, which may increase the random access process and Signaling overhead during TA maintenance, wasting system resources

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