Transmission method and system for TDD mobile communication system to share time wireless frame

A technology of wireless frame and timing information, applied in the field of mobile communication, can solve the problems of wireless frame alignment, inability of TDD system to coexist, interference, etc.

Inactive Publication Date: 2008-10-08
ZTE CORP
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Problems solved by technology

However, since one of the two frame structures ends with a downlink subframe and the other ends with an uplink subframe, this method cannot align the radio frames of the two systems in time, which will make the two TDD systems unable to coexist , causing serious interference with each other

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  • Transmission method and system for TDD mobile communication system to share time wireless frame
  • Transmission method and system for TDD mobile communication system to share time wireless frame
  • Transmission method and system for TDD mobile communication system to share time wireless frame

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Embodiment Construction

[0059] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] The present invention is applied to the coexistence of two TDD systems. As mentioned above, the frame structure of the first system is as follows figure 1 As shown, the frame structure of the second system is as follows figure 2 As shown, the frame lengths of the two frame structures are the same. In order to make the two systems compatible in the frame structure, when deploying the second system, the radio frame timing and the length of the uplink and downlink subframes need to be set, as shown in Figure 4 Shown:

[0061] 1. Align the downlink subframe of the second type of wireless frame with the start position of the second downlink subframe of the first type of wireless frame, that is, transmit at the same time, and the start time of the wireless frame of the second type of system can be delayed for a period o...

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Abstract

The present invention provides a method for transmitting the wireless frame when the TDD mobile communication systems coexist and a system thereof. Two TDD systems have same frame length of the wireless frames and are equally provided with a switching point from uplink to downlink and a switching point from downlink to uplink, wherein the second TDD system such as Wimax system confirms the lengthand the transmission time of the uplink subframe and downlink subframe in the wireless frame of the second TDD system according to the requirement that the homogeneous switching points of two systemsare aligned and according to the timing information of the wireless frame of the first TDD system such as TD-SCDMA system. The base station of the second TDD system transmits the downlink subframe according to the confirmed time, and indicates the transmission time of the uplink subframe in the transmitted uplink control information. The system completes the function with a frame time regulation and control module connected with two TDD systems. The method of the invention can facilitate that the TDD systems with different wireless frame structures coexist.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a radio frame transmitting method and system thereof when time division duplex mobile communication systems with different radio frame structures coexist. Background technique [0002] The duplexing modes of the mobile communication system include two modes of FDD (Frequency Division Duplexing, frequency division duplexing) and TDD (Time Division Duplexing, time division duplexing). FDD uses different frequency bands for uplink and downlink, so spectrum needs to be used in pairs. Compared with the FDD system, the TDD system has the following advantages: [0003] 1. No need for paired spectrum, which is convenient for spectrum planning; [0004] 2. Flexible allocation of uplink and downlink resources, suitable for asymmetric services; [0005] 3. The uplink and downlink of the TDD system occupy the same frequency band, and the reciprocity of the channel can be used to facilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J3/16H04J13/02
Inventor 胡留军袁柳清吴岩巍郁光辉
Owner ZTE CORP
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