Methods and Arrangements in a Wireless Communication System

• US 20110105105A1
• Filed: 07/09/2010
• Published: 05/05/2011
• Est. Priority Date: 11/02/2009
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Sâgfors, Mats Fredrik, Baldemair, Robert, Lindström, Magnus
• Application Number:
  US12/833,545
• Publication Number:
  US 20110105105A1
• Time in Patent Office: Days
• US Class Current: 455/422.1
• 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 48/12 using downlink control channel
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

The present invention relates to methods, a user equipment and a radio base station in a wireless communication system supporting carrier aggregation. The user equipment is configured to receive data from the radio base station in a first cell, and the radio base station is configured to broadcast system information comprising configuration parameters in the first and in a second cell. An example method for the user equipment comprises receiving configuration information for an aggregation of the first and the second cell, and information on how to apply the system information broadcasted in the second cell from the radio base station. The method further comprises reading the system information broadcasted in the second cell, and applying the read system information in accordance with the received instruction.

Claims

1. A method for a user equipment in a wireless communication system supporting carrier aggregation, wherein the user equipment is configured to receive data from a radio base station in a first cell and the radio base station is configured to broadcast system information comprising configuration parameters in the first and a second cell, the method comprising:

receiving configuration information for an aggregation of the first and the second cell from the radio base station; and

receiving information on how to apply the system information broadcasted in the second cell from the radio base station.

2. The method of claim 1, wherein the information on how to apply the system information comprises an instruction to not apply system information broadcasted in the second cell.

3. The method of claim 1, wherein the information on how to apply the system information comprises an instruction to apply only a part of the configuration parameters in the system information broadcasted in the second cell, the method further comprising:

reading the system information broadcasted in the second cell; and

applying the read system information in accordance with the received instruction.

4. The method of claim 1, wherein the information on how to apply the system information comprises a configuration parameter replacing a corresponding configuration parameter in the system information broadcasted in the second cell.

5. The method of claim 1, wherein the information on how to apply the system information is received in a dedicated message.

6. The method of claim 1, wherein the information on how to apply the system information is received in a broadcast message together with the system information broadcasted in the first or the second cell.

7. A method for a radio base station in a wireless communication system supporting carrier aggregation, wherein the radio base station is configured to transmit data to a user equipment in a first cell, the method comprising:

broadcasting system information comprising configuration parameters in the first and in a second cell;

transmitting configuration information for an aggregation of the first and second cells to the user equipment; and

transmitting information on how to apply the system information broadcasted in the second cell to the user equipment.

8. The method of claim 7, wherein the information on how to apply the system information comprises an instruction to not apply system information broadcasted in the second cell.

9. The method of claim 7, wherein the information on how to apply the system information comprises an instruction to apply only a part of the configuration parameters in the system information broadcasted in the second cell.

10. The method of claim 7, wherein the information on how to apply the system information comprises a configuration parameter replacing a corresponding configuration parameter in the system information broadcasted in the second cell.

11. The method of claim 7, wherein the information on how to apply the system information is transmitted in a dedicated message.

12. The method of claim 7, wherein the information on how to apply the system information is broadcasted together with the system information broadcasted in one of the first and the second cell.

13. A user equipment configured to be used in a wireless communication system supporting carrier aggregation, and to receive data from a radio base station in a first cell, wherein system information comprising configuration parameters is broadcasted in the first and a second cell by the radio base station, the user equipment comprising:

a receiving unit adapted to receive configuration information for an aggregation of the first and the second cell, and information on how to apply the system information broadcasted in the second cell from the radio base station.

14. The user equipment of claim 13, wherein the information on how to apply the system information comprises an instruction to not apply system information broadcasted in the second cell.

15. The user equipment of claim 13, wherein the information on how to apply the system information comprises an instruction to apply only a part of the configuration parameters in the system information broadcasted in the second cell, the user equipment further comprising:

a reading unit adapted to read the system information broadcasted in the second cell; and

an applying unit adapted to apply the read system information in accordance with the received instruction.

16. The user equipment of claim 13, wherein the information on how to apply the system information comprises a configuration parameter replacing a corresponding configuration parameter in the system information broadcasted in the second cell.

17. The user equipment of claim 13, wherein the information on how to apply the system information is received in a dedicated message.

18. The user equipment of claim 13, wherein the information on how to apply the system information is received in a broadcast message together with the system information broadcasted in the first or the second cell.

19. A radio base station configured to be used in a wireless communication system supporting carrier aggregation and to transmit data to a user equipment in a first cell, the radio base station comprising:

a broadcasting unit adapted to broadcast system information comprising configuration parameters in the first and in a second cell; and

a transmitting unit adapted to transmit configuration information for an aggregation of the first and second cells and information on how to apply the system information broadcasted in the second cell to the user equipment.

20. The radio base station of claim 19, wherein the information on how to apply the system information comprises an instruction to not apply system information broadcasted in the second cell.

21. The radio base station of claim 19, wherein the information on how to apply the system information comprises an instruction to apply only a part of the configuration parameters in the system information broadcasted in the second cell.

22. The radio base station of claim 19, wherein the information on how to apply the system information comprises a configuration parameter replacing a corresponding configuration parameter in the system information broadcasted in the second cell.

23. The radio base station of claim 19, wherein the information on how to apply the system information is transmitted in a dedicated message.

24. The radio base station of claim 19, wherein the information on how to apply the system information is broadcasted together with the system information broadcasted in one of the first and the second cell.