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Communication method and device of TDD mode

A technology of time division duplexing and communication method, which is applied in the directions of duplex signal operation, communication between multiple stations, wireless communication, etc., to achieve the effect of large normal communication coverage

Inactive Publication Date: 2008-02-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] And in TR25.913 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Feasibility Study for Evolved UTRA and UTRAN, third generation cooperation project; technical specification group radio access network; evolved universal terrestrial wireless access and universal terrestrial wireless Access Network Feasibility Study), it is required that the radius of the cell can support up to 30km, and the application scenario of 100km is not ruled out. Obviously, the frame structure in the above-mentioned prior art Figure 1 cannot meet this requirement

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  • Communication method and device of TDD mode
  • Communication method and device of TDD mode
  • Communication method and device of TDD mode

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Embodiment Construction

[0033] In TDD mode, in order to achieve coexistence with the TD-SCDMA system and allow communication to cover a wider range of cells, adjust the position of the uplink pilot time slot in the TDD subframe, which plays a key role in realizing data transmission in TDD mode, so that It's "away from" the guard interval. Based on the above spirit, the present invention provides multiple embodiments. The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0034] Referring to FIG. 2 and FIG. 3, they are respectively a flow chart and a subframe structure diagram of the first embodiment of the communication method in the TDD mode of the present invention. In FIG. 3, the prior art subframe structure (b in FIG. Frame structure (a in Fig. 3) comparison. The method comprises the steps of:

[0035] 201. When transmitting a subframe, first transmit downlink time slot 0 in the wireless subframe;

[0036] 202. Transmit a d...

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Abstract

The present invention provides a communication method and device in TDD mode. When transmitting a subframe, the method comprises the following procedures: the uplink time slot is transmitted tightly following the guide interval; the uplink pilot time slot is transmitted before the switching point of uplink to downlink. The invention can coexist with the TD-SCDMA system and make the communication coverage area changeable.

Description

technical field [0001] The present invention relates to a wireless communication method and its device, in particular to a communication method and its device in Time Division Duplex (TDD, Time Division Duplex) mode. Background technique [0002] In the field of communication, the TDD communication mode is a mode of wireless transmission in a wireless channel, which is realized by periodically repeating a Time Division Multiple Access (TDMA, Time Division-Synchronous Code Division Multiple Access) frame structure in the time domain. In the TDD mode, data transmission and reception are performed in time division, that is, the uplink and downlink channels can be time-division multiplexed, and can work in the frequency band without image frequency. [0003] Referring to Figure 1, it is the existing technology in TR25.814 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer aspects forevolved Universal Terrestrial Radio Access (...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04L5/14H04Q7/38H04B1/707H04W28/16
CPCH04B7/2618H04B2201/70701H04W28/16
Inventor 孙卫军吕永霞
Owner HUAWEI TECH CO LTD