Method and system for obtaining and transmitting GPS standard time in TD-SCDMA radio communication system

A TD-SCDMA, GPS time technology, applied in the field of TD-SCDMA wireless communication system, can solve problems such as synchronization difficulties

Active Publication Date: 2009-03-18
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the influence of multipath propagation is considered, this synchronization will be more difficult, which is the difficulty of realizing synchronous CDMA

Method used

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  • Method and system for obtaining and transmitting GPS standard time in TD-SCDMA radio communication system
  • Method and system for obtaining and transmitting GPS standard time in TD-SCDMA radio communication system
  • Method and system for obtaining and transmitting GPS standard time in TD-SCDMA radio communication system

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Embodiment Construction

[0051] The method and system for obtaining and transmitting the GPS standard time of the present invention are to use the characteristics such as synchronization between base stations and the consistency of the signals of the base stations including the system frame number (SFN) in the TD-SCDMA wireless communication system to achieve accurate GPS standard time . The TD-SCDMA wireless communication system includes multiple base stations, mobile terminals and wireless network controllers. Each base station includes a GPS receiver to receive GPS satellite signals and realize synchronization among the base stations. In addition, the mobile terminal has an A-GPS receiver, so it can use relevant information from wireless networks and satellites for GPS positioning. Embodiments of the present invention are described below with reference to the drawings.

[0052] Please refer to figure 1 As shown, the method for obtaining and transmitting the GPS standard time in one embodiment of ...

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Abstract

The invention discloses a method for obtaining and conveying a GPS standard time in a TD-SCDMA radio communication system, which comprises the following steps: firstly, respectively receiving GPS satellite signals by each of TD-SCDMA base stations, obtaining the absolute GPS standard time when a TD-SCDMA system clock determines a system frame number, then respectively reporting the measured absolute GPS standard time to a radio network controller, memorizing the absolute GPS standard time which is reported by each base station and informing the absolute GPS standard time when the system clockof a community where the mobile terminal which needs to be positioned is positioned in determines the system frame number by the radio network controller, and then calculating the current standard GPS time according to the current frame number by the mobile terminal. The method utilizes the characteristics of the base stations of the TD-SCDMA radio communication system that the base stations are synchronized, the positions of the base stations are accurate, and each of the base stations has a GPS receiver with high accuracy, and the method can obtain more accurate GPS standard time.

Description

technical field [0001] The invention relates to a TD-SCDMA wireless communication system, in particular to a method and a system for obtaining and transmitting GPS standard time in the TD-SCDMA wireless communication system. Background technique [0002] GPS is a satellite-based positioning system that was originally designed and controlled by the U.S. military and is free for anyone to use. This system is composed of 24 satellites operating in 6 intermediate circular orbits, and the time for one satellite to circle the orbit is close to 12 hours. Each satellite is constantly sending information about the current time, the positions of all satellites, and some related data like almanac and ephemeris. A GPS receiver uses this information to calculate the distance between itself and the satellites. To determine position, a GPS receiver must receive signals from at least four satellites. [0003] Time to First Fix (TTFF) characterizes the time required for the first position...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04B7/26H04Q7/20
Inventor 吴涛
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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