Timing adjusting method and base station of time division duplex system

A time-division duplex system and timing adjustment technology, which is applied in communication between multiple stations, electrical components, wireless communication, etc., can solve problems affecting the reception of the tail part of uplink signals, achieve interference mitigation, avoid interference, and simplify calculations The effect of work

Active Publication Date: 2009-12-02
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

In this way, the timing position will have an earlier or later fluctuation range. In the case of later fluctuations, it will cause the eNodeB side to receive the uplink transmission signal and send the downlink signal to overlap in the time domain, such as figure 2 As shown in the shaded part of the slash in (b), it affects eNodeB's reception of the tail part of the uplink signal

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  • Timing adjusting method and base station of time division duplex system
  • Timing adjusting method and base station of time division duplex system
  • Timing adjusting method and base station of time division duplex system

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[0027] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0029] The following implementations are described by taking the LTE system as an example. It can be understood that the technical solution of the present invention can also be applied to other communication systems other than LTE, can be applied to other network side devices other than eNodeB, and can also be applied to UEs. other mobile terminal...

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Abstract

The invention belongs to the field of wireless communication and discloses a timing adjusting method and a base station of a time division duplex system. A timing advance Ta of UE is set to be a value larger than two times of unidirectional transmission delay, thereby enhancing the robustness of TDD equipment when receiving and transmitting receiving-transmitting switching point signals, reducing the interference possibility of the tail part of the receiving time slot to the head part of the subsequent transmitting time slot, and improving the transmission performance on the whole. A protection time interval Tg can be determined according to the variance of a timing advance of a TDD system and the receiving-transmitting switching time of the base station in a TDD mode so as to further calculate the value of the timing advance Ta, wherein the Tg can be also a preset value.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a timing adjustment technology in a time division duplex (Time Division Duplex, "TDD" for short) system. Background technique [0002] Time Division Duplex (Time Division Duplex, referred to as "TDD") is a communication method of a mobile communication system. In this method, the information sent and received between the base station and the user equipment is in the form of a burst sequence, on the same carrier The frequency is alternately transmitted, that is, the sending and receiving parties take turns sending and receiving, or "ping-pong mode". In this way, a duplex channel can be implemented on one carrier frequency, thereby improving spectrum utilization. [0003] TDD technology is adopted in communication systems such as the Long Term Evolution ("LTE") system, in which Timing Advance (TA) is used to compensate for the loop transmission delay (Round Trip Time...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W88/08H04B7/26
Inventor 张小东简相超吴涛陈垚魏华
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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