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TDD system coexistent frame slip and/or uplink downlink time slot ratio transmitting method

A technology of sending time slot and frame sliding, which is applied in the communication between multiple stations, data exchange through path configuration, etc., can solve the problems of consideration and design without finding coexistence problems, and achieves maintaining the efficiency of sending time utilization and reducing the transmission time. The effect of small uplink and downlink interference

Inactive Publication Date: 2012-10-03
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The coexistence of TDD systems, especially the coexistence of TD-SCDMA systems and mobile WiMAX systems, currently has relevant analysis and simulation results, but in the public literature 1 and discussions, there is no consideration and design for solving this coexistence problem.

Method used

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  • TDD system coexistent frame slip and/or uplink downlink time slot ratio transmitting method
  • TDD system coexistent frame slip and/or uplink downlink time slot ratio transmitting method
  • TDD system coexistent frame slip and/or uplink downlink time slot ratio transmitting method

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Embodiment

[0077] This part takes the coexistence of TD-SCDMA system and mobile WiMAX as an example to illustrate the "frame sliding and / or design method of uplink and downlink transmission time slot ratio" proposed by the present invention:

[0078] The system parameters of TD-SCDMA in this example are:

[0079] The length of the subframe is 5ms, the length of the normal time slot (TS0~TS6) is 675us, the length of the downlink pilot time slot (DwPTS) is 75us, the length of the uplink pilot time slot (UpPTS) is 125us, and the length of the guard period (GP) is 75us . The uplink and downlink allocation ratio of time slots TS1~TS6 is 3:3 or 4:2

[0080] The system parameters of Mobile WiMAX in this example are:

[0081] ●The frame length is 5ms, 1024-point fast Fourier transform is adopted, the bandwidth is 10MHz, the oversampling rate is 11.2MHz, the length of the cyclic prefix is ​​1 / 8 symbol length, the symbol length is 103us, the TTG length is 106us, and the RTG length is 60us;

[...

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Abstract

The invention relates to a frame sliding method, which is suitable for time division multiplexing system coexistence and comprises the following steps: obtaining time reference information of a pre-deployed system by a rear-deployed system, calculating corresponding frame sliding time deviation deltat t by the rear-deployed system, and transmitting by the rear-deployed system according to the frame sliding time deviation deltat t. Uplink and downlink interference under neighboring carrier co-existence of neighboring frequency bands and same frequency bands can be greatly reduced, and the sending time utilization efficiency of the rear-deployed system can be kept simultaneously.

Description

technical field [0001] The invention relates to the frame structure and system coexistence design of a time division duplex (TDD: Time Division Duplex) system. Background technique [0002] Currently representative TDD systems include: TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system and IEEE 802.16e-based mobile broadband wireless access technology, that is, Mobile WiMAX (Mobile Worldwide Interoperability for MicrowaveAccess) technology . [0003] TD-SCDMA, as the mainstream technology of TDD in the third generation mobile communication system, has carried out large-scale network deployment in China. The used and alternative frequency bands include: 1880~1920MHz, 2010~2025MHz, 2300~2400MHz and under consideration 2496 ~ 2690MHz frequency band. [0004] The mobile WiMAX technology is based on the IEEE 802.16e standard and is promoted by the WiMAX Forum Industry Alliance. It is currently developing rapidly and is striving to become a candidate techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04L12/28
Inventor 郑旭峰梁宗闯何宏
Owner BEIJING SAMSUNG TELECOM R&D CENT
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