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Timing adjustment method, base station, terminal and communication system

A timing adjustment and information adjustment technology, which is applied in the field of communication, can solve problems such as absence, terminal failure to send uplink signals, and insufficient time to process data, etc.

Active Publication Date: 2018-02-23
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

The short TTI length is generally 7 OFDM symbols or 2 OFDM symbols, which is shorter than the existing TTI length of 1 ms. When the communication system uses a short TTI to transmit signals, the timing of the terminal sending uplink signals will change, which is not in line with the current Timing required by TA
And using short TTI to transmit signals, compared with the existing technology, the terminal will send the uplink signal earlier. In the case of a large value of TA, the terminal may not have enough time to process the data, resulting in the failure of the terminal to send the uplink signal. The problem

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  • Timing adjustment method, base station, terminal and communication system
  • Timing adjustment method, base station, terminal and communication system
  • Timing adjustment method, base station, terminal and communication system

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Embodiment Construction

[0091] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0092] The present invention provides a solution to the problem that the terminal may not have the processing capability to send uplink signals if the short transmission time interval TTI configuration is used when the timing advance TA of the communication system in the prior art is large.

[0093] On the one hand, the embodiments of the present invention provide a timing adjustment method on the base station side, such as figure 2 shown, including:

[0094] Step 21, the base station determines the timing advance TA of the terminal;

[0095] Step 22, the base station adjusts the time for the terminal to send the uplink signal according to the timing advance TA.

[0096] The method in this embodiment dynamically adjusts the time for the terminal to se...

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Abstract

The present invention provides a timing adjustment method, a base station, a terminal and a communication system. The timing adjustment method comprises: a base station determines a timing advance ofa terminal; and according to the timing advance, the base station adjusts time that the terminal sends an uplink signal. On the basis of an actual TA value, adaptive adjustment is performed on the time of sending the uplink signal of the terminal. An adjustment scheme of the present invention can also postpone the time of sending the uplink signal of the terminal, thereby obtaining enough data processing time, and avoiding sending failures of the uplink signal caused by not timely data processing.

Description

technical field [0001] The invention relates to the communication field, in particular to a timing adjustment method, a base station, a terminal and a communication system. Background technique [0002] LTE (Long Term Evolution, Long Term Evolution) technology supports two duplex modes of FDD (Frequency Division Duplex) and TDD (Time Division Duplex). Among them, the TDD mode refers to the use of the same working frequency band for the uplink and downlink, and the transmission of uplink and downlink signals at different times; The uplink and downlink signals are transmitted on the carrier. [0003] In the LTE system, the length of a radio frame in the FDD mode and the TDD mode is 10 ms, and includes 10 subframes 1 ms in length 1 ms. [0004] For the radio frame in TDD mode, seven TDD uplink and downlink subframe configurations are defined, as shown in Table 1, where D stands for downlink subframe, U stands for uplink subframe, and S stands for special subframe. [0005] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00
CPCH04W56/004H04W56/0015H04W72/0446H04W72/21H04W56/0005H04W72/20H04L5/0055
Inventor 王磊司倩倩潘学明高雪娟
Owner DATANG MOBILE COMM EQUIP CO LTD
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