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Uplink synchronization control method and device for long term evolution system

A long-term evolution system and synchronous control technology, applied in the field of communication, can solve problems such as poor synchronous control effect and inability to handle abnormal situations in a special way

Active Publication Date: 2013-06-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an uplink synchronization control method and device for a long-term evolution system, which can solve the problem that the uplink synchronization control method in the related art only handles the situation that the time adjustment value does not exceed the adjustment window, ignoring the possibility that the time adjustment value exceeds the adjustment window. The abnormal situation when adjusting the window cannot be specially handled, which leads to the problem that the uplink synchronization control effect is poor when the time adjustment value exceeds the adjustment window

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] figure 1 Shows a flow chart of the uplink synchronization control method according to the first embodiment of the present invention, the method includes the following steps:

[0029] Step S101, calculating a time adjustment value according to the uplink channel estimation sequence;

[0030] Step S102, judging whether the time adjustment value exceeds the adjustment window;

[0031] Step S103, generating a time adjustment instruction according to the judgment result;

[0032] Step S104, transmitting an uplink signal according to the time adjustment instruction.

[0033] In the above embodiment, firstly, the time adjustment value is calculated according to the uplink channel estimation sequence, and then a judgment is made on whether the time adjustment value exceeds the adjustment window, and different time adjustment instru...

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Abstract

A method and device for uplink synchronization control are provided in the present invention. The method includes obtaining the timing adjustment value by calculating based on the uplink channel estimation sequence, determining if the timing adjustment value exceeds the adjustment window, and producing different timing adjustment instructions based on the different results of the determination to adjust the time on which the terminal transmits the uplink signal. The present invention overcomes the problem in the related art that when the timing adjustment value exceeds the adjustment window, the uplink synchronization control is poor.

Description

technical field [0001] The present invention relates to the communication field, in particular, to an uplink synchronization control method and device for a long term evolution system. Background technique [0002] In the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution, 3rd Generation Partnership Project Long Term Evolution) communication protocol, the accuracy requirement for uplink synchronization is 16T s , is approximately 0.52µs, where T s =1 / (5000×2048) seconds. [0003] For other normal business conditions of non-random access, the timing adjustment MAC control unit carries a 6-bit timing adjustment command (Timing Advance Command) T A , the value range is T A =0, 1, 2,..., 63, used to indicate relative to the current absolute adjustment amount N TA，old The relative adjustment amount, then the new absolute adjustment amount is N TA，new =N TA，old +(T A -31)×16, the unit is T s . It can be seen from the above formula that the time adjustment ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04L27/26
CPCH04W56/0005
Inventor 秦洪峰李岩李萍袁红峰
Owner ZTE CORP