IP-LAYER DEVICE-TO-DEVICE COMMUNICATION IN MOBILE NETWORKS

• US 20150195863A1
• Filed: 07/26/2013
• Published: 07/09/2015
• Est. Priority Date: 07/27/2012
• Status: Abandoned Application

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: Interdigital Holdings Incorporated (InterDigital, Inc.)
• Inventors: Reznik, Alexander, Zuniga, Juan Carlos
• Application Number:
  US14/417,785
• Publication Number:
  US 20150195863A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04W 28/0215 based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections

Abstract

A wireless transmit receive unit (WTRU) may be configured to operate as a gateway, for instance as a remote mobility anchor. The WTRU may establish one or more direct, device-to-device communication links with respective complementary WTRUs. When an established device-to-device link between two WTRUs is lost, one or both of the WTRUs may initiate a fallback procedure to respective fallback gateways. An IP flow that originated over the device-to-device link may be moved to the respective fallback gateways.

Claims

1. A method to manage communications when a device to device (D2D) connection is lost, the method comprising:

detecting a loss of the D2D connection between a first wireless transmit/receive unit (WTRU) and a second WTRU;

receiving a list of candidate gateways via which the first WTRU may communicate with the second WTRU;

determining a fallback gateway (GW) associated with a network, wherein determining the fallback GW is based on the list of candidate gateways;

sending a communication to the fallback GW, wherein the communication comprises an indication related to the second WTRU; and

receiving a response from the fallback GW.

2. The method of claim 1, further comprising determining that a fallback is successful based on reception of the response.

3. The method of claim 1, further comprising establishing a tunnel from the first WTRU to the second WTRU, via the determined fallback GW.

4. The method of claim 1, wherein the indication comprises a message intended for the second WTRU.

5. The method of claim 1, wherein the indication comprises additional signaling.

6. The method of claim 1, wherein the response includes at least one of a null response packet or a selective acknowledgment.

7. The method of claim 1, wherein the D2D connection uses a home address (HoA) internet protocol (IP) address.

8. The method of claim 1, further comprising establishing a connection with the fallback GW using a care of address.

9. The method of claim 1, wherein detecting the loss of the D2D connection comprises at least one of a low-layer link measurement or a transmission control protocol (TCP) congestion measurement.

10. The method of claim 1, further comprising abandoning the D2D connection based on the response.

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

a processor configured at least in part to;

detect a loss of a device to device (D2D) connection between the first WTRU and a second WTRU;

receiving, at the first WTRU, a list of candidate gateways via which the first WTRU may communicate with the second WTRU;

determine a fallback gateway (GW) associated with a network, wherein determining the fallback GW is based on the list of candidate gateways;

send a communication to the fallback GW, wherein the communication comprises an indication related to the second WTRU; and

receive a response from the fallback GW.

12. The first WTRU of claim 11, wherein the processor is further configured to determine that a fallback is successful based on reception of the response.

13. The first WTRU of claim 11, wherein the processor is further configured to establish a tunnel from the first WTRU to the second WTRU, via the determined fallback GW.

14. The first WTRU of claim 11, wherein the indication comprises a message intended for the second WTRU.

15. The first WTRU of claim, 11, wherein the indication comprises additional signaling.

16. The first WTRU of claim 11, wherein the response includes at least one of a null response packet or a selective acknowledgment.

17. The first WTRU of claim 11, wherein the D2D connection uses a home address (HoA) internet protocol (IP) address.

18. The first WTRU of claim 11, wherein the processor is further configured to establish a connection with the fallback GW using a care of address.

19. The first WTRU of claim 11, wherein detection of the loss of the D2D connection comprises at least one of a low-layer link measurement or a transmission control protocol (TCP) congestion measurement.

20. The first WTRU of claim 11, wherein the processor is further configured to abandon the D2D connection based on the response.