Reconfiguration and handover procedures for fuzzy cells

Patent metadata

Field	Value
Publication number	US-9326211-B2
Application number	US-201113703343-A
Country	US
Kind code	B2
Filing date	Jun 10, 2011
Priority date	Jun 10, 2010
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A wireless transmit/receive unit (WTRU) may transmit data via multiple component carriers associated with multiple eNode-Bs. The WTRU may receive a handover request message from a source eNode-B. While maintaining a connection with a component carrier on the source eNode-B, the WTRU may establish a connection with another component carrier on a target eNode-B.

First claim

What is claimed:

1. A method for providing dual connectivity for wireless transmit/receive unit (WTRU), the method comprising:
receiving, via a source eNode-B, a measurement report from the WTRU;
sending a reconfiguration message to the WTRU to instruct the WTRU to use a second component carrier associated with a target eNode-B such that the WTRU can receive data split between the source e-Node-B and the target eNode-B; and
sending a component carrier cooperation (CCC) handover command to a target eNode-B such that a first connection between the source eNode-B and the WTRU using a first component carrier can be maintained while a second connection between the WTRU and the target eNode-B using the second component carrier can be established.

2. The method of claim 1 , wherein the sending the reconfiguration message to the WTRU comprising sending the reconfiguration message to the WTRU via medium access control (MAC) or radio resource control (RRC) signaling.

3. The method of claim 1 , further comprising identifying the second component carrier associated with the target eNode-B.

4. The method of claim 3 , wherein identifying the second component carrier comprises:
analyzing the measurement report received from the WTRU; and
identifying the second component carrier based on the analysis of the measurement report.

5. The method of claim 1 , wherein the measurement report comprises a first signal quality of the first component carrier and a second signal quality of the second component carrier.

6. The method of claim 1 , wherein the measurement report comprises a channel quality indication (CQI) for each secondary serving cell (Scell) associated with a cell identification.

7. The method of claim 1 , wherein the measurement report identifies a differential seen in a channel estimation between one or more Scells associated with a cell identification.

8. The method of claim 1 , wherein the measurement report includes carrier specific time to trigger values.

9. The method of claim 1 , wherein the CCC handover command instructs the target eNode-B to establish the second connection to the WTRU using the second component carrier.

10. The method of claim 1 , further comprising receiving a recommendation message from the target eNode-B identifying the second component carrier.

11. The method of claim 1 , further comprising receiving an acknowledgment message from the target eNode-B.

12. A method for providing dual connectivity for a wireless transmit/receive unit (WTRU), the method comprising:
sending, via a WTRU, a measurement report to a source eNode-B;
receiving a reconfiguration message from the source eNode-B instructing the WTRU to use a second component carrier associated with a target eNode-B such that the WTRU can receive data split between the source eNode-B and the target eNode-B; receiving a handover request message from the source eNode-B; and
establishing, while maintaining a first connection to the source eNode-B using a first component carrier, a second connection to the target eNode-B with the second component carrier.

13. The method of claim 12 , wherein receiving the reconfiguration message from the source eNode-B further comprises receiving the handover request message via medium access control (MAC) or radio resource control (RRC) signaling.

14. The method of claim 12 , wherein the measurement report comprises a channel quality indication (CQI) for each secondary serving cell (Scell) associated with a cell identification.

15. The method of claim 12 , wherein the measurement report identifies a differential seen in a channel estimation between one or more Scells associated with a cell identification.

16. The method of claim 12 , wherein the measurement report includes carrier specific time to trigger values.

17. A method for providing dual connectivity for a wireless transmit/receive unit (WTRU), the method comprising:
receiving, via a target eNode-B, a component carrier cooperation (CCC) handover command from a source eNode-B, the CCC handover command identifying a component carrier;
sending an acknowledgement message that indicates that the component carrier can be used to split data between the source eNode-B and the target eNode-B; and
establishing a connection between the WTRU and the target eNode-B using the component carrier based on the CCC handover command such that a connection between the WTRU and the source eNode-B is maintained.

18. The method of claim 17 , wherein the acknowledgement indicates that WTRU is permitted to use the component carrier.

19. The method of claim 17 , wherein establishing the connection between the WTRU and the target eNode-B using the component carrier comprises allowing the WTRU to use the component carrier via medium access control (MAC) or radio resource control (RRC) signaling.

20. The method of claim 17 , wherein the CCC handover command instructs the target eNode-B to establish the connection between the WTRU and the target eNode-B using the component carrier.

21. The method of claim 17 , further comprising transmitting a recommendation message identifying a second component carrier associated with the target eNode-B.

22. An eNode-B for providing dual connectivity for a wireless transmit/receive unit (WTRU), the eNode-B comprising:
a processor, the processor being configured to:
receive a measurement report from the WTRU;
send a reconfiguration message to the WTRU to instruct the WTRU to use a second component carrier associated with a target eNode-B such that the WTRU can receive data split between the eNode-B and the target eNode-B; and
send a component carrier cooperation (CCC) handover command to the target eNode-B such that a first connection between the eNode-B and the WTRU using a first component carrier can be maintained while a second connection between the WTRU and the target eNode-B using the second company carrier can be established.

23. The eNode-B of claim 22 , wherein the processor is configured to send the reconfiguration message to the WTRU by sending the reconfiguration message via medium access control (MAC) or radio resource control (RRC) signaling.

24. The eNode-B of claim 22 , wherein the processor is further configured to identify the second component carrier associated with the target eNode-B.

25. The eNode-B of claim 22 , wherein the measurement report comprises a first signal quality of the first component carrier and a second signal quality of the second component carrier.

26. The eNode-B of claim 22 , wherein the CCC handover command instructs the target eNode-B to establish the second connection to the WTRU using the second component carrier.

27. A wireless transmit/receive unit (WTRU) for providing dual connectivity, the WTRU comprising:
a processor, the processor configured to:
send a measurement report to a source eNode-B;
receive a reconfiguration message from the source eNode-B instructing the WTRU to use a second component carrier associated with a target eNode-B such that the WTRU can receive data split between the source eNode-B and the target eNode-B;
receive a handover request message from the source eNode-B; and
establish, while maintaining a first connection the source eNode-B using a first component carrier, a second connection to the target eNode-B with the second component carrier.

28. The WTRU of claim 27 , wherein the measurement report com

Assignees

• Kaur Samian J
• Pietraski Philip J
• Pinheiro Ana Lucia A
• Terry Stephen E
• Wang Carl
• Interdigital Patent Holdings

Inventors

• Kaur Samian J
• Pietraski Philip J
• Pinheiro Ana Lucia A
• Terry Stephen E
• Wang Carl

Classifications

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W36/30 Primary

  by measured or perceived connection quality data · CPC title

• H04W36/0072 Primary

  of resource information of target access point · CPC title

• H04W36/18

  for allowing seamless reselection, e.g. soft reselection · CPC title

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title