Position zone-based time division duplex satellite communication uplink signal alignment method

A time-division duplex and satellite communication technology, applied in the field of satellite communication, can solve the problems of different transmission delays and achieve the effect of avoiding data loss

Inactive Publication Date: 2011-01-19
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] This method enables the time-division duplex satellite communication system to solve the problem of different transmission delay differences within a beam, and provides a solution for aligning uplink signals for terminal signals at different locations to avoid data loss

Method used

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  • Position zone-based time division duplex satellite communication uplink signal alignment method
  • Position zone-based time division duplex satellite communication uplink signal alignment method
  • Position zone-based time division duplex satellite communication uplink signal alignment method

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Embodiment Construction

[0040] The present invention will be further described below through specific embodiments in conjunction with the drawings.

[0041] Consider a typical satellite beam coverage with a maximum transmission delay difference of approximately 1.3 milliseconds (ms) in a multi-beam antenna system.

[0042] The three wireless frame configuration structures set by the present invention are as follows Figure 2-4 Shown. In order to be compatible with the existing 3G standard, the total length of the wireless frame is 10ms, divided into 15 time slots. The length ratio of the uplink and downlink blocks can be adjusted. In this embodiment, the downlink block length of the radio frame is about 4.67 ms, which includes 7 downlink time slots; the uplink block length is about 5.33 ms, including 6 consecutive uplink time slots and Alignment protection time on 2 segments. Assuming that the maximum transmission delay difference in the beam is 1.3ms, the maximum unilateral transmission delay differenc...

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Abstract

The invention discloses a position zone-based time division duplex satellite communication uplink signal alignment method and belongs to the technical field of satellite communication. An uplink signal comprises a wireless frame; the wireless frame comprises a downlink block and an uplink window; the uplink window comprises an uplink block and first and second protection time with equal width. The satellite beam coverage range is divided into an intermediate transmission time delay zone, a large transmission time delay zone and a small transmission time delay zone, wherein the time delay of the three time delay zones is in a range of [tau mean-delta2, tau mean+delta1], [tau mean+delta1, tau max] and [tau min, tau mean-delta2] in turn; delta1 and delta2 are in the range of [0, (tau max-taumin) / 4] respectively; in the intermediate transmission time delay zone, the first protection time and the second protection time are positioned on two sides of the uplink block respectively; in the large transmission time delay zone, the first protection time and the second protection time are positioned on the right side of the uplink block respectively; and in the small transmission time delay zone, the first protection time and the second protection time are positioned on the left side of the uplink block respectively. The uplink signal alignment method can be used for satellite mobile communication.

Description

Technical field [0001] The invention relates to an uplink signal alignment method based on terminal location division in a time division duplex mode in satellite communication, and belongs to the technical field of satellite communication. Background technique [0002] The third generation (3G) terrestrial mobile communication system includes two types of systems: Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD: Time Division Duplexing). The TD-SCDMA standard with independent intellectual property rights in my country belongs to 3G. The standard is based on the TDD type of communication system. [3GPP TS 25.221V4.8.0 (2005-06) "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical channels and mapping of transport channels onto physical channels (TDD) (Release 4)"]. [0003] Recently, my country's TD-LTE-Advanced technical solution with independent intellectual property rights has become one of the 4G communication techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/212
Inventor 栾西吴建军任术波徐晓燕程宇新
Owner PEKING UNIV
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