GSM transceiver unit equipped for time of arrival measurements

• US 6,256,505 B1
• Filed: 05/28/1998
• Issued: 07/03/2001
• Est. Priority Date: 05/28/1998
• Status: Expired due to Term

• Current Assignee: Unwired Planet LLC (JP Morgan Chase & Co)
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lund, Lars-Goran, Holmring, Anders Thomas, Kingdon, Christopher Hugh, Zadeh, Bagher Rouhollah
• Primary Examiner(s): Urban, Edward F.
• Application Number:
  US09/086,759
• Time in Patent Office: 1,132 Days
• Field of Search: 455/456, 455/457, 455/524, 455/525, 455/561, 342/450, 342/457
• US Class Current: 455/456.2
• CPC Class Codes: G01R 31/318371 Methodologies therefor, e.g. algorithms, procedures
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

In a base station for use in a mobile communication system for communication with mobile subscribers over a plurality of radio channels, an improved transceiver unit is provided including a traffic controller handling downlink and uplink communication traffic with mobile subscribers over the plurality of radio channels, and a measuring device measuring arrival times of burst signals from a mobile subscriber communicating on a select one of the radio channels, or from a mobile subscriber communicating on another transceiver unit, on one of the plurality of radio channels.

Claims

1. In a base station for use in a wireless communication system for communication with mobile subscribers over a plurality of radio channels, an improved transceiver unit comprising:

a traffic controller handling downlink and uplink communication traffic with mobile subscribers over the plurality of radio channels;

a measuring device measuring arrival times of burst signals on a select one of the plurality of radio channels from either a mobile subscriber communicating with the traffic controller on the select one of the radio channels, or from a mobile subscriber communicating on a transceiver unit of a different base station; and

a switch operatively coupled to the traffic controller and the measuring device, the switch controlling the traffic controller and measuring device so that only one of the traffic controller and measuring device is operated at one time on the select one of the plurality of radio channels.

2. The improved transceiver unit of claim 1, wherein uplink communication traffic on said select one of the plurality of radio channels at the traffic controller is interrupted during burst signal measurement by the measuring device.

3. The improved transceiver unit of claim 2, wherein uplink communication traffic on said select one of the plurality of radio channels at the traffic controller is interrupted for approximately 0.4-0.5 seconds for burst signal time of arrival measurement.

4. The improved transceiver unit of claim 1, wherein downlink and uplink communication traffic on said select one of the plurality of radio channels is cleared at the traffic controller to allow the measuring device to measure burst signal time of arrival on said one of the plurality of radio channels.

5. The improved transceiver unit of claim 4, wherein downlink and uplink communication traffic on said select one of the plurality of radio channels is switched to another of the plurality of radio channels available for communication traffic at the traffic controller to allow the measuring device to measure burst signal time of arrival on said one of the plurality of radio channels.