Method, apparatus and system for synchronizing a cellular communication system to GPS time

一种蜂窝通信系统、蜂窝的技术，应用在导航领域，能够解决基站未装备等问题

Inactive Publication Date: 2010-06-23
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many locations, base stations are not equipped with LMUs

Method used

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  • Method, apparatus and system for synchronizing a cellular communication system to GPS time
  • Method, apparatus and system for synchronizing a cellular communication system to GPS time
  • Method, apparatus and system for synchronizing a cellular communication system to GPS time

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Embodiment Construction

[0052] see now figure 1 A global positioning system (GPS) receiver 10 according to the present invention is shown to include a cellular module 11 (not necessarily providing full cellular communication capability) and a GPS module 12 . The cellular module responds to a cellular communication signal through the cellular antenna 14 . The GPS module includes standard GPS hardware 21 for interpreting GPS ranging signals (including navigation data) received via the GPS antenna 15 after broadcast by a positioning system beacon 27 (e.g. a GPS satellite, but ground-based beacons are also possible). to respond. The cellular module processes cellular communication signals such that time synchronization information is extracted, such as from location measurement unit (LMU) messages, as described above. Cellular communication signals consist of data organized into frames, including delimiters (header and trailer) that enable the cellular module to distinguish one frame from the next. Th...

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Abstract

A ranging receiver (10) including a cellular module (11), for providing time according to a positioning system to enable synchronizing a wireless system to the positioning system. The ranging receiver (10) includes both the cellular module (11) and a main module (12) that provides ranging receiver functionality. When the cellular module (11) receives a time-stamped frame from the wireless system,it sends a trigger signal over a special hardware path to the main module (12), which then relates the time of trigger receipt to time according to the positioning system by calculating a position-velocity-time (PVT) solution, using a local clock (18) to get the difference in time between receipt of the trigger and the instant to which the PVT solution applies, and then communicates to the cellular module (11) when it received the trigger, according to positioning system time.

Description

[0001] Cross References to Related Applications [0002] For U.S. application serial number 09 / 777,521, titled "METHOD, APPARATUS AND SYSTEM FOR GPS TIME SYNCHRONIZATION USING CELLULAR SIGNAL BURSTS", filed February 5, 2001, attorney record number WFVA / NC 944-001.042 / 32546 quote. [0003] The above-referenced applications are assigned to the present assignee and are hereby incorporated by reference. technical field [0004] The present invention relates to navigation using a Global Positioning System (GPS), and more particularly to systems for providing GPS assistance and for providing GPS time recovery, especially in weak signal conditions. Background technique [0005] The operation of a Global Positioning System (GPS) receiver is based on the receiver having an accurate GPS time value; without such an accurate value, the distance calculated by the receiver (from the receiver to one or more GPS satellites) is inaccurate, Because they are simply determined as the differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W64/00H04B7/26G01S19/25
CPCH04B7/2693H04W64/00H04W56/0015
Inventor J·叙亚林内H·瓦利奥
Owner QUALCOMM INC
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