Method and apparatus for radio resources management in multi-radio access technology wireless systems

• US 9,380,628 B2
• Filed: 03/30/2015
• Issued: 06/28/2016
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Pelletier, Ghyslain, Pani, Diana
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): ONAMUTI, GBEMILEKE J
• Application Number:
  US14/673,000
• Publication Number:
  US 20150208458A1
• Time in Patent Office: 456 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 40/248 Connectivity information update
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Methods and apparatus for performing wireless communication in a wireless transmit/receive unit (WTRU) configured for multi-radio access technology (RAT) operation are disclosed. A method includes the WTRU wirelessly communicating information on a first operating frequency according to a first RAT. The WTRU also wirelessly communicates information on a second operating frequency according to a second RAT.

Claims

1. A wireless transmit/receive unit (WTRU) comprising:

a transceiver operatively coupled to a processor configured to receive a first radio resource control (RRC) message from a cell of a first radio access technology (RAT);

wherein in response to the first RRC message, a first medium access control (MAC) entity is configured for the first RAT;

wherein the first RRC message includes information for configuring the WTRU to communicate with a first primary cell of the first RAT;

the transceiver operatively coupled to the processor is further configured to receive a second RRC message a second MAC entity is configured for the second RAT;

wherein the second RRC message includes information for configuring the WTRU to communicate with a second primary cell for the second RAT;

wherein first MAC entity and the second MAC entity are different; and

the transceiver operatively coupled to the processor is further configured to communicate with the first RAT and the second RAT simultaneously.

2. The WTRU of claim 1, wherein the first RAT and the second RAT are different air interface technologies.

3. The WTRU of claim 1, wherein the first RAT and the second RAT are a same air interface technology.

4. The WTRU of claim 1, wherein information elements (IEs) for the second RAT include radio bearer, transport channel and physical channel configuration information.

5. The WTRU of claim 1, wherein information elements (IEs) for the second RAT include a MAC-MainConfig IE and a PhysicalConfigDedicated IE.

6. The WTRU of claim 1, wherein information elements (IEs) for the second RAT include a RadioResourceConfigDedicated IE and a RadioResourceConfigCommon IE.

13. The WTRU of claim 1, wherein the second RRC message is an RRC connection reconfiguration message.

14. The WTRU of claim 1. wherein the first or a third RRC message includes information for configuring the WTRU to communicate with a secondary cell of the first RAT;

wherein the transceiver operatively coupled to the processor is configured to communicate with the first primary cell and the secondary cell simultaneously.

15. The WTRU of claim 1, wherein the second RAT includes at least one secondary cell.

16. The WTRU of claim 1, wherein a single RRC entity is utilized for the first RAT and the second RAT.

7. A method comprising:

receiving, by a wireless transmit/receive unit (WTRU), a first radio resource control (RRC) message from a cell of a first radio access technology (RAT);

in response to the received first RRC message, configured a first medium access control (MAC) entity for the first RAT;

wherein the first RRC message includes information for configuring the WTRU to communicate with a first primary cell of the first RAT;

receiving, by the WTRU, a second RRC message from a cell of the first RAT;

in response to the second RRC message, configuring a second MAC entity for the second RAT;

wherein the second RRC message includes information for configuring the WTRU to communicate with a second primary cell for the second RAT;

wherein first MAC entity and the second MAC entity are different; and

communicating, by the WTRU, with the first RAT and the second RAT simultaneously.

8. The method of claim 7, wherein the first RAT and the second RAT are different air interface technologies.

9. The method of claim 7, wherein the first RAT and the second RAT are a same air interface technology.

10. The method of claim 7, wherein information elements (IEs) for the second RAT include radio bearer, transport channel and physical channel configuration information.

11. The method of claim 7, wherein information elements (IEs) for the second RAT include a MAC-MainConfig IE and a PhysicalConfigDedicated IE.

12. The method of claim 7, wherein information elements (IEs) for the second RAT include a RadioResourceConfigDedicated IE and a RadioResourceConfigCommon IE.

17. The method of claim 7, wherein the second RRC message is an RRC connection reconfiguration message.

18. The method of claim 7, wherein the first or a third RRC message includes information for configuring the WTRU to communicate with a secondary cell of the first RAT;

wherein the method further comprises communicating, by the WTRU, with the first primary cell and the secondary cell simultaneously.

19. The method of claim 7, wherein the second RAT includes at least one secondary cell.

20. The method of claim 7, wherein a single RRC entity is utilized, by the WTRU, for the first RAT and the second RAT.

21. A base station comprising:

a transceiver operatively coupled to a processor configured to transmit a first radio resource control (RRC) message to a wireless transmit/receive unit (WTRU);

wherein in response to the first RRC message, a first medium access control (MAC) entity is configured for a first radio access technology (RAT);

wherein the first RRC message includes information for configuring the WTRU to communicate with a first primary cell of the first RAT;

the transceiver operatively coupled to the processor is further configured to transmit a second RRC message using the first RAT;

wherein in response to the second RRC message, a second MAC entity is configured for the second RAT;

wherein the second RRC message includes information for configuring the WTRU to communicate with a second primary cell for the second RAT;

wherein first MAC entity and the second MAC entity are different; and

the transceiver operatively coupled to the processor is further configured to receive a communication over the first RAT from the WTRU while the WTRU simultaneously communicates using the second RAT.

22. The base station of claim 21 wherein the first RAT and the second RAT are different air interface technologies.

23. The base station of claim 21 wherein the first RAT and the second RAT are a same air interface technology.