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Method suitable for multiple TDD system coexistence

A technology of TD-SCDMA and deployment system, which is applied in the field of two or more TDD wireless communication systems, and can solve the problems of large antenna coverage area, great influence of base stations, and misalignment of uplink and downlink time slots of system 1 base station and system 2 base station, etc. , to achieve the effect of reducing uplink and downlink interference and maintaining transmission time utilization efficiency

Inactive Publication Date: 2009-07-15
SAMSUNG ELECTRONICS CO LTD +1
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Problems solved by technology

[0013] from figure 1 It can be found that the uplink and downlink time slots of the system 1 base station (BS1) and the system 2 base station (BS2) are not aligned, resulting in the following interference:
[0014] ■ Interference (101) from the transmission of the system 2 base station (BS2) to the reception of the system 1 base station (BS1) is due to the high transmission power of the base station and good transmission conditions (usually the transmission antenna is high and the antenna coverage area is large), so the inter-base station Disturbances have a big impact

Method used

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  • Method suitable for multiple TDD system coexistence
  • Method suitable for multiple TDD system coexistence
  • Method suitable for multiple TDD system coexistence

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Embodiment

[0098] This part takes the coexistence of TD-SCDMA system and IEEE 802.16m TDD as an example to illustrate the design method for the coexistence of multiple TDD systems proposed by the present invention.

[0099] Among them, TD-SCDMA is System 1, and IEEE 802.16m TDD is System 2.

[0100] ●TD-SCDMA frame structure

[0101] The frame structure of TD-SCDMA is as follows image 3 shown. Wherein, the frame length is 10ms, and is divided into two subframes, each subframe has a length of 5ms, and the length and structure of the two subframes are exactly the same. Among them, a TD-SCDMA subframe (5ms) is divided into: 7 normal time slots (TS0~TS6), a downlink pilot time slot (DwPTS), an uplink pilot time slot (UpPTS) and a guard period (GP ). The switching point (DUSP and UDSP) is the dividing point between the uplink and downlink time slots, through which the ratio of the number of uplink and downlink time slots can be adjusted, so as to adapt to the asymmetric services in vario...

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Abstract

A method which is suitable for the coexistence of a plurality of TDD systems comprises the following steps: calculating a relative time offset deltat of corresponding frame by a back disposing system; and transmitting uplink / downlink signal by the back disposing system according to the time reference information of back disposing system, which is obtained through adding the relative time offset deltat of frame with the first disposition time reference. The method according to the invention can greatly reduce the uplink-downlink interference in the coexistence of adjacent frequency band and the adjacent carrier of same frequency band, and keeps the transmission time utilization efficiency of back disposing system.

Description

technical field [0001] The present invention relates to two or more TDD wireless communication systems, in particular to the frame structure and system coexistence design of two or more Time Division Duplex (TDD: Time Division Duplex) systems. Background technique [0002] At present, in the field of wireless mobile communication, representative TDD systems include: TD-SCDMA (Time-Division Synchronization Code Division Multiple Access) system and mobile broadband wireless access technology based on IEEE 802.16e specification, That is, Mobile WiMAX (Mobile Worldwide Interoperability for Microwave Access) technology, and the TDD mode in IEEE 802.16m that is being standardized (hereinafter referred to as IEEE 802.16m TDD). [0003] TD-SCDMA, as the mainstream time-division duplex TDD technology 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/033H04L5/14H04L12/28H04B7/26
CPCH04W56/00H04B7/2684H04B7/2656
Inventor 郑旭峰仲川梁宗闯何宏崔浩虎赵杰文宋俊杰
Owner SAMSUNG ELECTRONICS CO LTD
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