System Information Update For Carrier Aggregation

• US 20110201323A1
• Filed: 02/15/2011
• Published: 08/18/2011
• Est. Priority Date: 02/15/2010
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Wu, Chunli, Jokimies, Matti, Sebire, Benoist Pierre
• Granted Patent: US 9,596,068 B2
• Time in Patent Office: Days
• US Class Current: 455/418
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method for providing SI updates for a carrier aggregation system is described. The method includes, for each other CC of a configured set of CCs, determining a start time for the other CC when updated SI for the other CC becomes valid. A first time prior to each start time for the at least one other CC is determined. A message including the updated SI for the at least one other CC and an indication of the first time is sent on a first CC. A UE configured for a set of CCs receiving the message. For each CC of the configured set of CCs, a next time for the other CC which begins after the first time is determined and the UE is configured to use the updated SI for the other CC beginning at the next time. Apparatus and computer readable media are also described.

Claims

1. A method comprising:

receiving at a user equipment, on a first component carrier, a message comprising updated system information for at least one other component carrier and an indication of a first time,

where the user equipment is configured for a set of component carriers; and

for each other component carrier of the configured set of component carriers;

determining a next time for the other component carrier which begins after the first time and configuring the user equipment to use the updated system information for the other component carrier beginning at the next time.

2. The method of claim 1, where the first time is a start of a system frame on the first component carrier.

3. The method of claim 2, where the indication comprises a system frame number for the system frame on the first component carrier.

4. The method of claim 1, where determining the next time for the other component carrier comprises determining a next modification period boundary for the other component carrier which occurs after the first time.

5. The method of claim 4, where determining the next time is based at least in part on configuration data for the other component carrier.

6. The method of claim 1, where modification period boundaries for the first component carrier and modification period boundaries for the at least one other component carrier are unaligned.

7-8. -8. (canceled)

9. A method comprising:

for each other component carrier of a configured set of component carriers;

determining a start time for the other component carrier when updated system information for the other component carrier becomes valid;

determining a first time prior to each start time for the at least one other component carrier; and

sending, on a first component carrier, a message comprising the updated system information for the at least one other component carrier and an indication of the first time.

10. The method of claim 9, where the first time is a start of a system frame on the first component carrier.

11. The method of claim 10, where the indication comprises a system frame number for the system frame on the first component carrier.

12. The method of claim 10, where determining the first time comprises determining a system frame which starts prior to each start time.

13. The method of claim 9, where modification period boundaries for the first component carrier and modification period boundaries for the at least one other component carrier are unaligned.

14-16. -16. (canceled)

17. An apparatus, comprising at least one processor;

and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following;

to receive at a user equipment, on a first component carrier, a message comprising updated system information for at least one other component carrier and an indication of a first time, where the user equipment is configured for a set of component carriers; and

to determine, for each other component carrier of the configured set of component carriers, a next time for the other component carrier which begins after the first time and to configure the user equipment to use the updated system information for the other component carrier beginning at the next time.

18. The apparatus of claim 17, where the first time is a start of a system frame on the first component carrier.

20. The apparatus of claim 17, where the at least one memory and the computer program code are further configured to cause the apparatus, when determining the next time for the other component carrier, to determine a next modification period boundary for the other component carrier which occurs after the first time.

22. The apparatus of claim 17, where modification period boundaries for the first component carrier and modification period boundaries for the at least one other component carrier are unaligned.

19. (canceled)

21. (canceled)

23-24. -24. (canceled)

25. An apparatus, comprising at least one processor;

and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following;

to determine, for each other component carrier of a configured set of component carriers, a start time for the other component carrier when updated system information for the other component carrier becomes valid;

to determine a first time prior to each start time for the at least one other component carrier; and

to send, on a first component carrier, a message comprising the updated system information for the at least one other component carrier and an indication of the first time.

26. The apparatus of claim 25, where the first time is a start of a system frame on the first component carrier.

27. The apparatus of claim 26, where the indication comprises a system frame number for the system frame on the first component carrier.

28. The apparatus of claim 26, where the at least one memory and the computer program code are further configured to cause the apparatus, when determining the first time, to determine a system frame which starts prior to each start time.

29. The apparatus of claim 25, where modification period boundaries for the first component carrier and modification period boundaries for the at least one other component carrier are unaligned.

30-64. -64. (canceled)