Location aided wireless signal characteristic adjustment

• US 20050143090A1
• Filed: 12/29/2003
• Published: 06/30/2005
• Est. Priority Date: 12/29/2003
• Status: Abandoned Application

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Dowling, Martin J.
• Application Number:
  US10/747,299
• Publication Number:
  US 20050143090A1
• Time in Patent Office: Days
• US Class Current: 455/456.100
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Location data is used to augment signal parameter measurement and signal control of wireless transmit/receive units (WTRUs). When communication between a base station and the WTRU is established and a location of the WTRU is obtained by the base station, the data is correlated to a database. The correlated data is used to predict changes in signal parameters and the anticipated changes are used to provide adjustments in communication signals between the base station and the WTRU.

Claims

1. A method for controlling signal parameters in a wireless system, the method comprising:

establishing a signal connection between a wireless transmit/receive unit (WTRU) and a base station;

obtaining a geopositional fix on the WTRU;

correlating the geopositional fix with a database to obtain anticipated movement of the WTRU; and

providing signal control parameters based on the anticipated movement.

2. The method of claim 1, wherein the correlation of the geopositional fix includes:

mapping the geopositional fix to the database; and

correlating the geopositional fix and the database to obtain anticipated movement of the WTRU.

3. The method of claim 2, comprising reducing a number of signal adjustments executed by the WTRU by using said signal control parameters based on the anticipated movement.

4. The method of claim 2, comprising:

using the database to determine anticipated transitory changes in signal values; and

using said signal control parameters to provide reduced changes in a target SIR in response to transitory changes.

5. The method of claim 2, comprising said signal control parameters providing a response to an anticipated change in Doppler shift based on geopositional data from the WTRU and data from the database.

6. The method of claim 2, comprising reducing a number of signal adjustments executed by the WTRU by using said signal control parameters based on the anticipated movement.

7. The method of claim 1 wherein said anticipated movement of said WTRU is obtained at least in part by empirically determining the probability of said WTRU moving to a location by correlating said positional fix and a travel vector of said WTRU with said database, said database containing statistics on the subsequent travel of previous WTRUs at that location and moving in that direction.

8. The method of claim 1 wherein said anticipated movement of said WTRU is obtained at least in part by correlating said WTRU'"'"'s path with data concerning known paths on a map of the area contained within said database and thereby determining an anticipated path of said WTRU is following a known path.

9. The method of claim 1, further comprising using said anticipated movement to provide handoff information to the WTRU.

10. The method of claim 1, further comprising using a GPS receiver in the WTRU, and transmitting data obtained from the GPS receiver in order to obtain the geopositional fix.

11. The method of claim 1, further comprising obtaining the geopositional fix by effecting signal measurements at the base station.

12. The method of claim 1, further comprising using fixed monitors to provide measurements for the database.

13. A wireless communication system, capable of controlling signal parameters, comprising:

a circuit for establishing a signal connection with a wireless transmit/receive unit (WTRU) and at least one base station;

a circuit for obtaining from geopositional data of the WTRU;

a database including signal data correlated with geopositional data;

a circuit for correlating the geopositional data with the database to obtain anticipated movement of the WTRU; and

a circuit for providing signal control parameters based on the anticipated movement.

14. The wireless communications system of claim 13, wherein the circuit for correlating the geopositional data includes:

a comparison circuit function for mapping a geopositional fix based on the geopositional data to the database; and

a circuit for correlating the geopositional fix and the database to obtain anticipated movement of the WTRU.

15. The wireless communications system of claim 14 wherein the circuit for correlating the geopositional data obtains said anticipated movement by empirical determination of a probability of the WTRU moving to a location by correlating the positional fix and a travel vector of the WTRU with said database, said database containing statistics on the subsequent travel of previous WTRUs at that location and moving in that direction.

16. The wireless communications system of claim 13, wherein the circuit for obtaining geopositional data on the WTRU receives data generated by a GPS receiver in the WTRU, the data generated by the GPS receiver in order to obtain a geopositional fix based on the geopositional data.

17. The wireless communications system of claim 16, wherein:

the database includes data concerning a correlation of the geopositional data and anticipated movement; and

the circuit for correlating the geopositional data further correlates the geopositional data with anticipated movement as indicated by the data concerning the correlation of geopositional data and anticipated movement.

18. The wireless communications system of claim 13 wherein said anticipated movement of said WTRU is obtained by determining a path of the WTRU and correlating the path with data concerning known paths contained within said database and thereby determining an anticipated path of the WTRU.

19. The wireless communications system of claim 13, wherein the circuit for obtaining geopositional data on the WTRU uses signal measurements at the base station in calculating the geopositional data.

20. The wireless communications system of claim 13, further comprising using fixed monitors to provide measurements for the database.

21. A wireless transmit/receive unit (WTRU) capable of controlling signal parameters, comprising:

a circuit for establishing a signal connection with at least one base station;

a circuit for obtaining geopositional data and providing the geopositional data to said base station;

a circuit for receiving correlated data based on the geopositional data, the correlated data providing signal control parameters based on anticipated movement of the WTRU.

22. The WTRU of claim 21, wherein the circuit for obtaining the geopositional data and providing the geopositional data to said base station further calculates movement of the WTRU and provides data concerning movement of the WTRU.

23. The WTRU of claim 21, wherein the circuit for obtaining geopositional data on the WTRU receives data generated by a GPS receiver in the WTRU, the data generated by the GPS receiver in order to obtain a geopositional fix based on the geopositional data.

24. The WTRU of claim 21, further comprising a circuit for generating signal adjustments in response to the signal control parameters in combination with sensed actual signal changes, so as to increase response to actual changes by using estimations based on the correlated data.

25. The WTRU of claim 21, further comprising a circuit, responsive to the signal controls, for reducing a number of signal adjustments executed by the WTRU by using said signal control parameters based on the anticipated movement.