Split neighbor lists for multiple hyperband capable cellular communications systems

• US 5,666,650 A
• Filed: 04/19/1995
• Issued: 09/09/1997
• Est. Priority Date: 04/19/1995
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Turcotte, Eric, Brunner, Richard
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Armstrong, Darnell R.
• Application Number:
  US08/426,675
• Time in Patent Office: 874 Days
• Field of Search: 455/33.1, 455/34.1, 455/54.1, 455/56.1, 455/62, 455/63, 455/67.1, 455/67.3, 455/33.2, 379/39, 379/60
• US Class Current: 370/329
• CPC Class Codes: H04W 48/10 using broadcasted information

Abstract

A split neighbor list for a multiple hyperband capable cellular communications system. The neighbor list includes a first data set targeted to Cellular hyperband only capable mobile stations identifying available Cellular hyperband channels. The split neighbor list further includes a second data set targeted to multiple hyperband capable mobile stations identifying available Cellular and PCS hyperband channels. In processing the first and second data sets of the split neighbor list, the multiple hyperband capable mobile stations replace the cellular channels identified in the first data set with cellular channels from the second data set prior to server selection or hand-off determination processing. Alternatively, channel information is extracted from the first data set to complete the second data set.

Claims

1. A cellular communications system providing communications to mobile stations over a plurality of hyperbands, each hyperband including a plurality of available communications channels, the system comprising:

means for transmitting to mobile stations a neighbor list identifying available channels for communication, the neighbor list being split, to include;

a first data set identifying available first channels for mobile station communication in a first one of the plurality of hyperbands, the number of first channels not exceeding a predetermined maximum number of channels; and

a second data set identifying available second channels for mobile station communication in the first one of the plurality of hyperbands and available third channels in a second one of the plurality of hyperbands, the sum of the number of second and third channels not exceeding the predetermined maximum number of channels.

2. The system of claim 1 wherein the available second channels identified in the second data set comprise substitute channels for replacing the first channels identified in the first data set.

3. The system as in claim 1 wherein certain ones of the available first channels are extracted from the first data set for replacing second channels missing from the first data set.

4. The system as in claim 1 wherein the neighbor list comprises a server selection neighbor list.

5. The system as in claim 1 wherein the neighbor list comprises a MAHO neighbor list.

6. The system as in claim 1 wherein the mobile stations comprise first hyperband only capable mobile stations and multiple hyperband capable mobile stations, the information in the first data set of the neighbor list being split, being targeted to first hyperband only mobile stations, and the information in the second data set of the neighbor list being split, being targeted to multiple hyperband capable mobile stations.

7. The system as in claim 6 wherein the available second channels identified in the second data set are substituted by multiple hyperband capable mobile stations for the first channels identified in the first data set in order to present for neighbor list consideration no more than the predetermined maximum number of channels.

8. The system as in claim 6 wherein certain ones of the first channels are extracted from the first data set by multiple hyperband capable mobile stations to replace second channels of the second data set if no second channels are identified.

9. A method for transmitting channel information to mobile stations operating in a cellular communications system including a plurality of hyperbands, each hyperband having a plurality of available communications channels, the method comprising the steps of:

transmitting a neighbor list to mobile stations identifying available channels for communication, the neighbor list being split, to include;

a first data set identifying available first channels for mobile station communication in a first one of the plurality of hyperbands, the number of first channels not exceeding a predetermined maximum number of channels; and

a second data set identifying available second channels for mobile station communication in the first one of the plurality of hyperbands and available third channels in a second one of the plurality of hyperbands, the sum of the second and third channels not exceeding the predetermined maximum number of channels;

receiving, by first hyperband only capable ones of the mobile stations, said transmitted neighbor list being split;

receiving, by multiple hyperband capable ones of the mobile stations, said transmitted split neighbor list;

processing said received neighbor list being split, by the first hyperband only capable mobile stations to choose for communications among first channels identified in the first data set; and

processing said received neighbor list being split, by the multiple hyperband capable mobile stations to choose for communications among the second and third channels identified in the second data set.

10. The method of claim 9 wherein the step of processing of the received neighbor list being split, by the multiple hyperband capable mobile stations further includes the step of substituting the second channels identified in the second data set for the first channels identified in the first data set.

11. The method as in claim 9 wherein the step of processing of the received neighbor list being split, by the multiple hyperband capable mobile stations further includes the steps of:

extracting certain ones of the first channels identified in the first data set; and

substituting the extracted first channels for the second channels of the second data set if no second channel are identified.

12. A split neighbor list for use multiple hyperband capable cellular communications system, comprising:

a first data set identifying available channels for mobile station communications in a first one of a plurality of system supported communications hyperbands, said first data set targeted to mobile stations capable of operating only in the first hyperband; and

a second data set identifying available channels for mobile station communications in both the first and a second one of a plurality of system supported communications hyperbands, said second data set targeted to mobile stations capable of operating in both the first and second hyperbands.

13. The split neighbor list of claim 12 wherein the total number of available channels in the first data set does not exceed a predetermined maximum.

14. The split neighbor list as in claim 13 wherein the total number of available channels in the second data set does not exceed the predetermined maximum.

15. The split neighbor list as in claim 12 wherein the channels of the first data set include analog and digital channels available in the first hyperband.

16. The split neighbor list as in claim 12 wherein the channels of the second data set include analog and digital channels available across the first and second hyperbands.

17. The split neighbor list as in claim 12 wherein the channels of the second data set for the first hyperband are substituted for the channels of the first data set of the first hyperband by mobile stations capable of operating in both the first and second hyperbands.

18. The split neighbor list as in claim 12 wherein certain ones of the channels of the first data set for the first hyperband are extracted to replace channels of the second data set for the first hyperbands by mobile stations capable of operating in both the first and second hyperbands if no channels of the first hyperband are identified.

19. A cellular communications system, comprising:

a plurality of first mobile stations capable of operation in only a first one of a plurality of available hyperbands, said first hyperband including a plurality of communications channels;

a plurality of second mobile stations capable of operation in both the first and a second one of the plurality of available hyperbands, said second hyperband including a plurality of communications channels; and

means for transmitting a neighbor list to mobile stations identifying available channels across the hyperbands for mobile station communication, the neighbor list being split, to include;

a first part identifying available channels for first mobile station communication in the first hyperband; and

a second part identifying available channels for second mobile station communication in both the first and second hyperbands.

20. The system as in claim 19 wherein the neighbor list comprises a server selection neighbor list.

21. The system as in claim 19 wherein the neighbor list comprises a MAHO neighbor list.

22. The system as in claim 19 wherein the first mobile stations select a channel in the first hyperband from those identified in the first part of the neighbor list being split.

23. The system as in claim 19 wherein the second mobile stations select a channel in either the first or second hyperbands from those identified in the second part of the neighbor list being split.

24. The system as in claim 19 wherein the second mobile stations substitute channels of the first hyperband identified in the second part of the neighbor list being split, for those channels of the first hyperband identified in the first part of the neighbor list being split.

25. The system as in claim 19 wherein the second mobile stations extract channels of the first hyperband identified in the first part of the neighbor list being split, to replace channels of the first hyperband if no such channels are identified in the second part of the neighbor list being split.