Method, apparatus and system for redistribution of mobile stations to different channels

• US 7,623,880 B2
• Filed: 10/21/2005
• Issued: 11/24/2009
• Est. Priority Date: 10/22/2004
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wang, Jun, Sinnarajah, Ragulan
• Primary Examiner(s): Anderson; Matthew D
• Assistant Examiner(s): YOUSSEF, ADEL Y
• Application Number:
  US11/255,491
• Publication Number:
  US 20060094437A1
• Time in Patent Office: 1,495 Days
• Field of Search: 455509-517, 455/452.1, 370/331
• US Class Current: 455/509
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 72/52 based on load

Abstract

Method and apparatus for enhanced selection of a channel for use in redistributing mobile stations to various frequencies in a communication system. In one aspect, the method appends a redistribution alteration record to a common channel redistribution message. The redistribution alteration record alters the sequencing of the mobile station when selecting a channel in the common channel redistribution message.

Claims

1. A method for redistributing a plurality of mobile stations among a plurality of channels in a communication system, comprising:

transmitting, by a base station, a pilot channel enabling mobile stations to communicate with the base station;

generating a common channel redistribution message having a channel listing comprising a plurality of channels associated with the base station;

generating a redistribution alteration record comprising a capability control, wherein the capability control instructs a mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels, wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

appending the redistribution alteration record to the common channel redistribution message; and

transmitting the redistribution alteration record and the common channel redistribution message over a common channel in the communication system.

2. The method of claim 1, wherein generating the redistribution alteration record further comprises generating an instruction to direct at least one of the plurality of mobile stations to forego system determination following channel redistribution of the at least one of the plurality of mobile stations.

3. The method of claim 2, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

4. The method of claim 1, wherein generating the redistribution alteration record further comprises instructions altering selection of a the subset of channels based on capabilities of the mobile station.

5. The method of claim 4, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

25. The method of claim 1, wherein the capability control is further configured to instruct the mobile station to hash to a specific channel within the subset of channels according to rules prioritizing capabilities corresponding to capabilities of the mobile station.

30. The method of claim 1, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising generating a direct-to-idle indication directing the mobile station to go directly to an idle state for at least one of the frequencies in different bands, and wherein the transmitting the redistribution alteration record and the common channel redistribution message further comprises transmitting the direct-to-idle indication.

31. The method of claim 1, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising generating a power-up indication directing the mobile station whether or not to skip performing a power up registration for at least one of the frequencies in different bands, and wherein the transmitting the redistribution alteration record and the common channel redistribution message further comprises transmitting the power-up indication.

6. A method for altering sequencing in a mobile station, comprising:

receiving, by a mobile station, a pilot channel from a base station enabling the mobile stations to communicate with the base station;

receiving a common channel redistribution message and a redistribution alteration record, wherein the common channel redistribution message includes a channel listing comprising a plurality of channels associated with the base station, wherein the redistribution alteration record includes a capability control, wherein the capability control instructs the mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels, wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

altering the sequencing of the selection of the subset of channels from the common channel redistribution message in the mobile station based on the redistribution alteration record; and

hashing at least one of the subset of channels to select a new channel to communicate with the base station.

7. The method of claim 6, further comprising forgoing system determination following the hashing to select the new channel.

8. The method of claim 7, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

9. The method of claim 6 further comprising altering selection of the subset of channels based on capabilities of the mobile station.

10. The method of claim 9, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

26. The method of claim 6, wherein the capability control is further configured to instruct the mobile station to hash to a specific channel within the subset of channels according to rules prioritizing capabilities corresponding to capabilities of the mobile station.

32. The method of claim 6, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising receiving a direct-to-idle indication directing the mobile station to go directly to an idle state for at least one of the frequencies in different bands, and wherein the hashing further comprises going directly to the idle state if the new channel corresponds to the direct-to-idle indication.

33. The method of claim 6, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising receiving a power-up indication directing the mobile station to skip performing a power up registration for at least one of the frequencies in different bands, and wherein the hashing further comprises skipping the power up registration if the new channel corresponds to the power-up indication.

11. A memory including computer-executable instructions for redistributing a plurality of mobile stations to a plurality of channels in a communication system, the memory comprising:

at least one instruction operable to cause a base station to transmit a pilot channel enabling mobile stations to communicate with the base station;

at least one instruction operable to cause the base station to generate a common channel redistribution message having a channel listing comprising a plurality of channels associated with the base station;

at least one instruction operable to cause the base station to generate a redistribution alteration record, comprising a capability control, wherein the capability control instructs a mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels, wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

at least one instruction operable to cause the base station to append the redistribution alteration record to the common channel redistribution message; and

at least one instruction operable to cause the base station to transmit the redistribution alteration record and the common channel redistribution message over a common channel in the communication system.

12. The medium memory of claim 11, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

13. The memory of claim 11, further comprising computer-executable instructions for altering selection of the subset of channels based on capabilities of the mobile station.

27. The computer readable medium memory of claim 11, wherein the capability control is further configured to instruct the mobile station to hash to a specific channel within the subset of channels according to rules prioritizing capabilities corresponding to capabilities of the mobile station.

14. A memory including computer-executable instructions for altering sequencing in a mobile station, the memory comprising:

at least one instruction operable to cause a mobile station to receive a pilot channel from a base station enabling the mobile stations to communicate with the base station;

at least one instruction operable to cause the mobile station to receive a common channel redistribution message and a redistribution alteration record, wherein the common channel redistribution message includes a channel listing comprising a plurality of channels associated with the base station, wherein the redistribution alteration record includes a capability control, wherein the capability control instructs the mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels, wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

at least one instruction operable to cause the mobile station to alter the sequencing of the selection of the subset of channels from the common channel redistribution message in the mobile station based on the redistribution alteration record; and

at least one instruction operable to cause the mobile station to hash at least one of the subset of channels to select a new channel to communicate with the base station.

15. A base station for redistributing a plurality of mobile stations to a plurality of channels in a communication system, comprising:

means for transmitting, by a base station, a pilot channel enabling mobile stations to communicate with the base station;

means for generating a common channel redistribution message having a channel listing comprising a plurality of channels associated with the base station;

means for generating a redistribution alteration record for appending to a common comprising a capability control, wherein the capability control instructs a mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels. wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

means for appending the redistribution alteration record to the common channel redistribution message; and

means for transmitting the redistribution alteration record and the common channel redistribution message over a common channel in the communication system.

16. The base station of claim 15, wherein the means for generating the redistribution alteration record further comprises means for generating an instruction to direct at least one of the plurality of mobile stations to forego system determination following channel redistribution of the at least one of the plurality of mobile stations.

17. The base station of claim 15, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

18. The base station of claim 15, wherein the means for generating the redistribution alteration record further comprises means for altering selection of the subset of channels based on capabilities of the mobile station.

19. The base station of claim 18, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

28. The base station of claim 15, wherein the capability control is further configured to instruct the mobile station to hash to a specific channel within the subset of channels according to rules prioritizing capabilities corresponding to capabilities of the mobile station.

34. The base station of claim 15, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising means for generating a direct-to-idle indication directing the mobile station to go directly to an idle state for at least one of the frequencies in different bands, and wherein the means for transmitting the redistribution alteration record and the common channel redistribution message further comprises means for transmitting the direct-to-idle indication.

35. The base station of claim 15, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising means for generating a power-up indication directing the mobile station whether or not to skip performing a power up registration for at least one of the frequencies in different bands, and wherein the means for transmitting the redistribution alteration record and the common channel redistribution message further comprises means for transmitting the power-up indication.

20. A mobile station, comprising:

means for receiving, by a mobile station, a pilot channel from a base station enabling the mobile stations to communicate with the base station;

means for receiving a common channel redistribution message and a redistribution alteration record, wherein the common channel redistribution message includes a channel listing comprising a plurality of channels associated with the base station, wherein the redistribution alteration record includes a capability control, wherein the capability control instructs the mobile station to alter a sequencing of a selection of a subset of channels from the plurality of channels in the common channel redistribution message for subsequent hashing by the mobile station to select a new channel from subset of channels, wherein the altering of sequencing of the selection of the subset of channels provides channel redistribution of a plurality of mobile stations among the plurality of channels;

means for altering the sequencing of the selection of the subset of channels from the common channel redistribution message in the mobile station based on the redistribution alteration record; and

means for hashing at least one of the subset of channels to select a new channel to communicate with the base station.

21. The mobile station of claim 20, further comprising means for forgoing system determination following channel redistribution of the mobile station.

22. The mobile station of claim 20, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

23. The mobile station of claim 20, further comprising means for altering selection of the subset of channels based on capabilities of the mobile station.

24. The mobile station of claim 23, wherein the common channel redistribution message is one of an Extended CDMA Channel List Message (ECCLM) and an Extended Global Service Redirection Message (EGSRDM).

29. The mobile station of claim 20, wherein the capability control is further configured to instruct the mobile station to hash to a specific channel within the subset of channels according to rules prioritizing capabilities corresponding to capabilities of the mobile station.

36. The mobile station of claim 20, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising means for receiving a direct-to-idle indication directing the mobile station to go directly to an idle state for at least one of the frequencies in different bands, and wherein the means for hashing further comprises means for going directly to the idle state if the new channel corresponds to the direct-to-idle indication.

37. The mobile station of claim 20, wherein the plurality of channels comprise a plurality of frequencies in different bands, further comprising means for receiving a power-up indication directing the mobile station to skip performing a power up registration for at least one of the frequencies in different bands, and wherein the means for hashing further comprises means for skipping the power up registration it the new channel corresponds to the power-up indication.