公开(公告)号：WO0209310A3

公开(公告)日：2002-06-06

申请号：PCT/US0121653

申请日：2001-07-09

Applicant: ERICSSON INC ,  BLOEBAUM LELAND SCOTT

Inventor： BLOEBAUM LELAND SCOTT

IPC: G01S1/00 ,  H04B1/38 ,  G01S1/04

CPC classification number: G01S19/235 ,  G01S19/29 ,  H04B1/3805

Abstract: A component of a system receives information that identifies an adjustment to a frequency source. The adjustment relates to wireless communication. A component of the system compensates for the adjustment to track or acquire one or more positional signals.

Abstract translation: 系统的组件接收标识对频率源的调整的信息。 该调整涉及无线通信。 该系统的一个部件补偿了跟踪或获取一个或多个位置信号的调整。

公开(公告)号：WO0173467A2

公开(公告)日：2001-10-04

申请号：PCT/US0106858

申请日：2001-03-05

Applicant: ERICSSON INC

Inventor： CARLSSON HANS ,  KOORAPATY HAVISH ,  BLOEBAUM LELAND SCOTT

IPC: G01S1/00 ,  G01S19/03 ,  G01S19/11 ,  G01S19/23 ,  G01S19/25 ,  H04B7/26 ,  H04Q7/34 ,  G01S5/14

CPC classification number: H04B7/2693 ,  G01S19/11 ,  G01S19/235 ,  G01S19/256

Abstract: A method and apparatus for acquiring timing signals for use in a positioning receiver using timing assistance provided by a wireless communications system, such as cellular telephone system. A mobile terminal equipped with a positioning receiver operates in a wireless communications system having control channels and at least one traffic channel unsynchronized to the control channels. The mobile terminal camps on a first control channel in a first cell having a first time base associated therewith. While camped on the control channel, the mobile terminal establishes a local clock reference, internal to the mobile terminal, capable of tracking the first time base. The mobile terminal then operates on a first traffic channel that is unsynchronized to the first control channel and notes the difference in time bases between the control channel and the traffic channel. Either while camped on the control channel or while operating on the traffic channel, the mobile terminal receives TDMA-to-GPS relationship data, which is a measure of the offset between system time for the wireless communications system as expressed on particular control channel ("TDMA time") and the system time for the GPS system ("GPS time"). Thereafter, an accurate estimate of the GPS time is calculated in the mobile terminal based on the local clock reference and the TDMA-to-GPS relationship data. In some aspects, the local clock reference is updated based on the first traffic channel so as to minimize errors arising from timing drift.

Abstract translation: 一种用于获取定时信号的方法和装置，所述定时信号使用由无线通信系统（诸如蜂窝电话系统）提供的定时辅助。 配备有定位接收机的移动终端在具有控制信道和与控制信道不同步的至少一个业务信道的无线通信系统中操作。 移动终端驻留在具有与其相关联的第一时基的第一小区中的第一控制信道上。 当在控制信道上驻留时，移动终端在移动终端的内部建立能够跟踪第一时间基准的本地时钟参考。 然后，移动终端在与第一控制信道不同步的第一业务信道上操作，并记录控制信道与业务信道之间的时基差异。 无论是在控制信道上驻留还是在业务信道上操作时，移动终端接收TDMA到GPS关系数据，这是在特定控制信道（“特定控制信道”上表示的无线通信系统的系统时间之间的偏移的量度） TDMA时间“）和GPS系统的系统时间（”GPS时间“）。 此后，基于本地时钟参考和TDMA到GPS关系数据，在移动终端中计算GPS时间的精确估计。 在一些方面，基于第一业务信道更新本地时钟参考，以便最小化由定时漂移引起的错误。