Re-synchronization triggering method and base station

A technology of resynchronization and base station, applied in the field of communication, which can solve problems such as impaired uplink throughput

Active Publication Date: 2017-09-22
SHANGHAI HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a resynchronization triggering method and a base station, aiming to solve the problem of impaired uplink throughput caused by the existing resynchronization triggering method

Method used

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  • Re-synchronization triggering method and base station

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Embodiment Construction

[0015] The resynchronization triggering method disclosed in the embodiment of the present application is applied in the scenario where the MTA is enabled. Specifically, the scenario where the MTA is enabled can be a scenario of non-same coverage of the CA (two cells cover different areas), or the same coverage of the CA. (two cells covering the same area) scenario.

[0016] In this embodiment, the CA may be two uplink carriers, or may be N (N is an integer greater than 2) uplink carriers.

[0017] In the existing protocol, after the uplink SCC is activated, the reason why the base station triggers resynchronization after a delay of 30 milliseconds is that the demodulation performance of different terminals is different. After some terminals activate the uplink SCC, the antenna cannot work immediately. The existing protocol stipulates that the antenna is activated The delay time is 34 milliseconds, corresponding to the base station, the existing protocol stipulates that after t...

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Abstract

The application provides a re-synchronization triggering method and a base station. The method comprises the following steps that: after uplink secondary carrier cell (SCC) is activated, the base station immediately triggers re-synchronization, wherein a triggering moment of the re-synchronization is T1; and the base station detects whether a feedback signal of the re-synchronization is received or not within a preset time range, and if so, triggers the re-synchronization, wherein a starting moment of the preset time range is the T1, an ending moment of the preset time range is T2, and a difference value between the T2 and the T1 is less than or equal to 30 milliseconds. The base station immediately triggers the re-synchronization after the uplink SCC is triggered, so that lag time of the re-synchronization can be shortened, and the uplink throughput is increased. If the feedback signal of the re-synchronization is not received within the preset time range, the base station triggers the re-synchronization once again, so that compatibility with different terminals can be realized, and the terminals can correctly demodulate physical downlink control channel commands.

Description

technical field [0001] The present application relates to the communication field, in particular to a resynchronization triggering method and a base station. Background technique [0002] As the carrier aggregation (Carrier Aggregation, CA) technology matures day by day, there are more and more demands on the uplink CA technology. In order to ensure demodulation performance of uplink CA, the base station sends timing advances (Timing Advances, TA) to the terminal. The terminal maintains uplink synchronization according to the TA. In the uplink CA scenario, the terminal can send uplink data in multiple cells, and the TAs of multiple cells may be different. Therefore, for the terminal, it may be necessary to maintain multiple timing advances (Multiple Timing Advances, MTA) at the same time. . [0003] In the prior art, when the MTA is turned on, the base station needs to delay resynchronization after 30 milliseconds after activation of an uplink secondary carrier cell (Seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W56/00
CPCH04L5/001H04W56/0005H04W56/0015H04W56/0045H04L5/0098H04L5/0053H04W74/00H04W56/001
Inventor 王旭陈召娣
Owner SHANGHAI HUAWEI TECH CO LTD
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