Optimized ordering of assistance data in a mobile radio network

1. A method of optimally communicating Assistance Data to a mobile station (MS) in a wireless network, the method comprising:

providing a list of satellites;

determining an optimal order of the satellites based on a characteristic of the mobile station, wherein the optimal order comprises a first optimal satellite and a second optimal satellite;

preparing a first of a segmented set of Assistance Data messages in the wireless network, wherein the first of the segmented set of Assistance Data messages comprises

reference information including a satellite time and a coarse MS location; and

satellite vehicle position information for the first optimal satellite and the second optimal satellite; and

beginning to transmit the first of the segmented set of Assistance Data messages from the wireless network to the mobile station.

2. The method of claim 1 , wherein the first optimal satellite and the second optimal satellite are selected based on being approximately orthogonally oriented with respect to the mobile station.

3. The method of claim 1 , wherein the characteristic of the mobile station comprises the coarse MS location.

4. The method of claim 1 , wherein the characteristic of the mobile station comprises an environmental characteristic related to the coarse MS location.

5. The method of claim 4 , wherein the environmental characteristic comprises an indicator of a rural landscape.

6. The method of claim 4 , wherein the environmental characteristic comprises an indicator of a mountainous landscape.

7. The method of claim 4 , wherein the environmental characteristic comprises an indicator of an urban landscape.

8. The method of claim 1 , further comprising continuing to transmit subsequent messages of the segmented set of Assistance Data messages until a sufficient amount Assistance Data has been sent, wherein each subsequent segment of the segmented set of Assistance Data messages includes satellite position information for equal or less optimal satellites than previous messages.

9. The method of claim 1 , wherein the Assistance Data message comprises a Radio Resource Location Protocol (RRLP) Assistance Data message.

10. The method of claim 1 , further comprising transmitting a Measure Position Request message.

11. The method of claim 10 , wherein the Measure Position Request message comprises a Radio Resource Location Protocol (RRLP) Measure Position Request message.

12. The method of claim 10 , wherein the Measure Position Request message comprises no Assistance Data.

13. A method of optimally communicating Assistance Data to a mobile station (MS) in a wireless network, the method comprising:

providing a list of satellites;

determining an optimal order of the satellites based on a characteristic of the mobile station, wherein the optimal order comprises a first optimal satellite and a second optimal satellite, and wherein the first optimal satellite and the second optimal satellite are selected based on being approximately orthogonally oriented with respect to the mobile station, and wherein the characteristic of the mobile station comprises a coarse MS location or an environmental characteristic related to the coarse MS location;

preparing a first of a segmented set of Assistance Data messages in the wireless network, wherein the first of the segmented set of Assistance Data messages comprises

reference information including a satellite time and the coarse MS location; and

satellite vehicle position information for the first optimal satellite and the second optimal satellite;

beginning to transmit the first of the segmented set of Assistance Data messages from the wireless network to the mobile station; and

continuing to transmit subsequent messages of the segmented set of Assistance Data messages until a sufficient amount Assistance Data has been sent, wherein each subsequent segment of the segmented set of Assistance Data messages includes satellite position information for equal or less optimal satellites than previous messages.

14. A network for optimally communicating Assistance Data to a mobile station (MS) in a wireless network, the network comprising:

memory comprising a list of satellites;

logic to determine and produce an optimal order list of the satellites based on a characteristic of the mobile station, wherein the optimal order comprises a first optimal satellite and a second optimal satellite;

memory to hold the optimally ordered list; and

a transmitter to transmit a first of a segmented set of Assistance Data messages, wherein the first of the segmented set of Assistance Data messages comprises

reference information including a satellite time and a coarse MS location; and

satellite vehicle position information for the first optimal satellite and the second optimal satellite.

15. The network of claim 14 , wherein the first optimal satellite and the second optimal satellite are selected based on being approximately orthogonally oriented with respect to the mobile station.

16. The network of claim 14 , wherein the characteristic of the mobile station comprises the coarse MS location.

17. The network of claim 14 , wherein the characteristic of the mobile station comprises an environmental characteristic related to the coarse MS location.

18. The network of claim 14 , further comprising a controller to transmit subsequent of the segmented set of Assistance Data messages until a sufficient amount Assistance Data has been sent, wherein each subsequent segment of the segmented set of Assistance Data messages includes satellite position information for equal or less optimal satellites than previous messages.

19. A network for optimally communicating Assistance Data to a mobile station (MS) in a wireless network, the network comprising:

means for providing a list of satellites;

means for determining an optimal order of the satellites based on a characteristic of the mobile station, wherein the optimal order comprises a first optimal satellite and a second optimal satellite;

means for preparing a first of a segmented set of Assistance Data messages, wherein the first of the segmented set of Assistance Data messages comprises

reference information including a satellite time and a coarse MS location; and

satellite vehicle position information for the first optimal satellite and the second optimal satellite;

means for beginning to transmit the first of the segmented set of Assistance Data messages.

20. The network of claim 19 , wherein the first optimal satellite and the second optimal satellite are selected based on being approximately orthogonally oriented with respect to the mobile station.

21. The network of claim 19 , wherein the characteristic of the mobile station comprises the coarse MS location.

22. The network of claim 19 , wherein the characteristic of the mobile station comprises an environmental characteristic related to the coarse MS location.

23. The network of claim 19 , further comprising means for continuing to transmit subsequent messages of the segmented set of Assistance Data messages until a sufficient amount Assistance Data has been sent, wherein each subsequent segment of the segmented set of Assistance Data messages includes satellite position information for equal or less optimal satellites than previous messages.

24. The network of claim 19 , wherein the Assistance Data message comprises a Radio Resource Location Protocol (RRLP) Assistance Data message.

25. The network of claim 19 , further comprising means for transmitting a Measure Position Request message.

26. The network of claim 25 , wherein the Measure Position Request message comprises a Radio Resource Location Protocol (RRLP) Measure Position Request message.

27. The network of claim 25 , wherein the Measure Position Request message comprises no Assistance Data.

28. A computer-readable product comprising a non-transitory computer-readable medium comprising:

code for causing at least one computer to provide a list of satellites;

code for causing at least one computer to determine an optimal order of the satellites based on a characteristic of a mobile station (MS), wherein the optimal order comprises a first optimal satellite and a second optimal satellite;

code for causing at least one computer to prepare a first of a segmented set of Assistance Data messages, wherein the first of the segmented set of Assistance Data messages comprises

reference information including a satellite time and a coarse MS location; and

satellite vehicle position information for the first optimal satellite and the second optimal satellite; and

code for causing at least one computer to begin to transmit the first of the segmented set of Assistance Data messages.

29. The computer-readable product of claim 28 , wherein the first optimal satellite and the second optimal satellite are selected based on being approximately orthogonally oriented with respect to the mobile station.

30. The computer-readable product of claim 28 , wherein the characteristic of the mobile station comprises the coarse MS location.

31. The computer-readable product of claim 28 , wherein the characteristic of the mobile station comprises an environmental characteristic related to the coarse MS location.

32. The computer-readable product of claim 28 , further comprising code for causing at least one computer to continue to transmit subsequent messages of the segmented set of Assistance Data messages until a sufficient amount Assistance Data has been sent, wherein each subsequent segment of the segmented set of Assistance Data messages includes satellite position information for equal or less optimal satellites than previous messages.