SPECTRUM MANAGEMENT ACROSS DIVERSE RADIO ACCESS TECHNOLOGIES

• US 20100220687A1
• Filed: 02/09/2010
• Published: 09/02/2010
• Est. Priority Date: 02/10/2009
• Status: Abandoned Application

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Li, Tianming, Zuniga, Juan Carlos, Reznik, Alexander, Kwak, Joseph A., Purkayastha, Debashish
• Application Number:
  US12/703,142
• Publication Number:
  US 20100220687A1
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/005 involving radio access media independent information, e.g. MIH [Media independent Hand-off]
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/304 due to measured or perceived resources with higher communication quality

Abstract

A network management node may manage a network of base stations and wireless transmit/receive units (WTRUs) that operate using diverse radio access technologies. The network management node may communicate with other network management nodes to manage spectrum usage across their respective managed networks. The network management node may acts as a proxy for cellular-capable WTRUs that operate within the managed networks. The network management node may perform handovers of Peer-to-Peer (P2P) groups that operate within the managed networks. The WTRUs may include WTRUs that operate at Very High Frequency (VHF) or Ultra High Frequency (UHF) spectrum (“white space”) frequencies.

Claims

1. A method for use in a network node, the method comprising:

receiving a service request from a wireless transmit/receive unit (WTRU);

in response to the service request, sending a first message to a second network node, wherein the first message indicates a request that the second network node make a frequency band available;

receiving a second message from the second network node, wherein the second message indicates that the second network node has made the frequency band available; and

sending a third message to the WTRU, wherein the third message indicates that the WTRU should communicate data on the frequency band.

2. The method of claim 1, further comprising:

sending a fourth message to the second network node, wherein the fourth message indicates a query as to whether the second network node can make the frequency band available; and

receiving a fifth message from the second network node, indicating that the second network node can make the frequency band available;

wherein the sending the first message to the second network node is performed further in response to the fifth message.

3. The method of claim 1, wherein the service request is received via a radio access network, and wherein the sending the first message to the second network node is performed further in response to a determination that radio conditions on the radio access network do not support the service request.

4. The method of claim 3, further comprising:

receiving a measurement report indicating radio conditions on the radio access network;

wherein the determination that radio conditions on the radio access network do not support the service request is based on the measurement report.

5. The method of claim 1, wherein the service request is received via a first radio access network, and wherein the third message indicates that the WTRU should handover to a second radio access network.

6. The method of claim 1, wherein the second message is an MIH_N2N_HO_Complete.request message.

7. The method of claim 1, wherein the frequency band is a white space frequency band.

8. A method for use in a network node, the method comprising:

receiving a service request from a wireless transmit/receive unit (WTRU);

evaluating spectrum usage on a first radio access network;

in response to the evaluation, causing a frequency band currently in use to become available; and

sending a first message to the WTRU, wherein the first message indicates that the WTRU should communicate data on the frequency band.

9. The method of claim 8, wherein the causing the frequency band to become available includes sending a second message to a second network node, wherein the second message indicates a request that the second network node make the frequency band available.

10. The method of claim 9, further comprising:

receiving a third message from the second network node, wherein the third message indicates that the second network node has made the frequency band available.

11. The method of claim 8, wherein the causing the frequency band to become available includes moving a second WTRU from the frequency band to a second frequency band.

12. The method of claim 8, wherein the first message indicates that the WTRU should handover to a second radio access network.

13. The method of claim 8, wherein the first message is an MIH_MN_HO_Commit.request message.

14. The method of claim 8, wherein the frequency band is a white space frequency band.

15. A network node comprising:

a processor configured to make a determination to handover a Peer-To-Peer (P2P) group of wireless transmit/receive units (WTRUs) from a first radio access network to a second radio access network; and

a transmitter configured to send handover messages to the WTRUs in the P2P group, the handover messages indicating that the WTRUs in the P2P group should handover to the second radio access network.

16. The network node of claim 15 wherein the processor is configured to make the determination to handover the P2P group based on an initiation of an application by at least one WTRU in the P2P group.

17. The network node of claim 15 wherein the processor is configured to make the determination to handover the P2P group based on Quality of Service (QoS) requirements of WTRUs in the P2P group.

18. The network node of claim 15 wherein the processor is configured to make the determination to handover the P2P group based on radio conditions on the first radio access network.

19. The network node of claim 18 further comprising:

a receiver configured to receive a measurement report indicating radio conditions on the first radio access network;

wherein the determination to handover the P2P group based on radio conditions is based on the measurement report.

20. The network node of claim 15, wherein at least one of the handover messages is an MIH_MIH_Net_HO_Commit.request message.