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Method and device for uplink transmission time adjustment

A technology of launch time and adjustment method, which is applied in the field of communication, can solve problems such as handover process failure, failure to receive SS commands, low accuracy of Tadv, etc., and achieve the effect of improving success rate and reliability

Inactive Publication Date: 2013-12-25
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For uplink synchronization adjustment, NodeB determines the content of the issued SS command according to the peak position of the received Midamble code, and the receiving window of Midamble code is only 16 chips, and the uplink receiving window is relatively small. If the uplink transmission time Tx deviation is relatively large , so that if the uplink receiving signal goes out of the window, the NodeB will not receive the uplink Midamble code, and the corresponding downlink will not receive the correct SS command, and the uplink Tadv will not be able to be adjusted, and finally the handover process will fail.
[0017] Aiming at the problem that the accuracy of uplink Tadv is low in related technologies, which affects the effect of cell handover, no effective solution has been proposed so far

Method used

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  • Method and device for uplink transmission time adjustment
  • Method and device for uplink transmission time adjustment
  • Method and device for uplink transmission time adjustment

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Embodiment Construction

[0040] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0041] In order to improve the effect of cell relay handover, the embodiments of the present invention provide a method and device for adjusting uplink transmission time. By adjusting the uplink Tadv, the accuracy of the uplink Tadv is improved, thereby improving the success rate of cell relay handover. The following will be described in detail through examples.

[0042] This embodiment provides a method for adjusting the uplink transmission time, which can be implemented on the terminal side, such as figure 2 The flow chart of the method for adjusting the uplink transmission time shown, the method includes the following steps (step S202-step S206):

[0043] Step S202, adjusting the uplink Tadv; ...

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Abstract

The invention discloses a method and a device for uplink transmission time adjustment. The method comprises the steps of adjusting an uplink Tadv, sending an uplink SB to a base station according to the adjusted uplink Tadv and adjusting the uplink transmission time according to a downlink SB sent by the base station. According to the method, the uplink Tadv is adjusted first, then the uplink SB is sent to the base station according to the adjusted uplink Tadv, and finally, the uplink transmission time is adjusted according to the downlink SB sent by the base station. The problem that the cell switching effect is influenced due to low accuracy of the uplink Tadv in the related technology is solved, the reliability of uplink Tadv setting is improved, and the success rate of cell relay switching is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for adjusting uplink transmission time. Background technique [0002] In Time Division-Synchronous Code Division Multiple Access (TD-SCDMA for short) system, when a mobile station enters another cell from one cell during a call, the call is transferred from one The wireless channel is switched to another channel, a handoff occurs. The handover in the TD-SCDMA system is divided into two ways: hard handover and relay handover. [0003] Hard handover means that when a user switches from one cell or sector to another, the communication with the original base station is interrupted first, and then the carrier frequency is changed to establish communication with the new cell. Relay handover means that when a user switches from one cell or sector to another, the distance and azimuth of the terminal are positioned using technologies such as smart antennas and uplin...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04L1/00
Inventor 梁立宏
Owner SANECHIPS TECH CO LTD
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