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Method, system and user device to realize synchronization through time division duplex long-term evolution system

A long-term evolution system and time-division duplex technology, which is applied in synchronization devices, electrical components, wireless communications, etc., can solve problems such as the inability of user equipment to receive synchronization signals

Active Publication Date: 2015-03-25
CHINA UNITED NETWORK COMM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a method, system and user equipment for realizing synchronization of a time division duplex long-term evolution system, which are used to solve the problem that the user equipment cannot receive the synchronization signal when the base station of the TDD-LTE system in the prior art does not send a synchronization signal in the downlink time slot. Synchronization signal for uplink synchronization

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  • Method, system and user device to realize synchronization through time division duplex long-term evolution system
  • Method, system and user device to realize synchronization through time division duplex long-term evolution system
  • Method, system and user device to realize synchronization through time division duplex long-term evolution system

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Embodiment Construction

[0026] In order to give a clear and detailed introduction to the embodiment of the present invention, the Long Term Evolution (LTE) system is firstly introduced here. The LTE system defines the duplex mode of the FDD-LTE system and the TDD-LTE system at the same time, and designs the frame structures of the FDD-LTE system and the TDD-LTE system respectively.

[0027] in, figure 1 It is a schematic diagram of the frame structure of the TDD-LTE system, such as figure 1 As shown, each 10ms radio frame includes 2 half-frames with a length of 5ms, and each half-frame consists of 4 data subframes and 1 special subframe. The special subframe includes 3 special time slots: the downlink pilot time slot DwPTS, the guard interval GP, and the uplink pilot time slot UpPTS, with a total length of 1 ms. Among them, DwPTS is always used for downlink transmission, UpPTS is always used for uplink transmission, and GP is used as a guard time interval for downlink to uplink conversion in the TD...

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Abstract

The invention provides a method, a system and a user device to realize synchronization through a time division duplex long-term evolution system. The method comprises the following steps that: a synchronized signal is sent by a first frequency carrier channel of receiving station; the time-slot position of the system is obtained according to the synchronized signal; and synchronous access is carried out on a second frequency carrier channel according to the time-slot position of the system. Problems that when synchronized signals cannot be sent by the base station of the TDD-LTE system in the prior art in the downlink time slot, the user device can not receive synchronized signals for uplink synchronization are solved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for realizing synchronization of a time division duplex long-term evolution system, and user equipment. Background technique [0002] With the development of wireless communication technology, people's demand for new technology to increase the ability of wireless communication system to transmit information has become more and more urgent. The Time Division Duplex (TDD) system can effectively solve the uplink and downlink problems. The problem of symmetrical service transmission efficiency, the TDD system means that the uplink and downlink information can be transmitted in different time periods in the same frequency spectrum, which requires that the air interface of the TDD system must achieve good downlink synchronization and uplink synchronization. Otherwise, it will cause interference inside the system and reduce the system capacity....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 张忠皓孔力乔金剑陈国利
Owner CHINA UNITED NETWORK COMM GRP CO LTD