Method and apparatus for device-to-device (D2D) mobility in wireless systems

Patent metadata

Field	Value
Publication number	US-10045386-B2
Application number	US-201313906055-A
Country	US
Kind code	B2
Filing date	May 30, 2013
Priority date	May 31, 2012
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A wireless transmit/receive unit (WTRU) may receive discovery related configuration information that includes discovery filtering information and information for a non-long term evolution radio access technology (non-LTE RAT). The WTRU may monitor a device to device (D2D) communication interface on the non-LTE RAT based on the discovery filtering information and send a report that includes information associated with the discovery filtering information. The WTRU may receive a message to allow the WTRU to establish a D2D communication link with another WTRU using the non-LTE RAT.

First claim

What is claimed:

1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving, by the WTRU using a long term evolution (LTE) radio access technology (RAT), discovery related configuration information, wherein the discovery related configuration information includes discovery filtering information and information for a non-LTE RAT;
monitoring, by the WTRU, a device-to-device (D2D) communication interface on the non-LTE RAT based on the discovery filtering information;
transmitting, by the WTRU using the LTE RAT, a report based on the discovery filtering information, wherein the report includes information associated with the discovery filtering information;
receiving, by the WTRU using the LTE RAT, a message to allow the WTRU to establish a D2D communication link with another WTRU using the non-LTE RAT; and
communicating, by the WTRU using the non-LTE RAT, on the D2D communication link with the another WTRU based on the received message.

2. The method of claim 1 , further comprising:
triggering, by the WTRU, a measurement report to an eNB.

3. The method of claim 1 , further comprising:
receiving, by the WTRU, a proximity detection configuration from an eNB.

4. The method of claim 1 , wherein the D2D communication link is further based on receiving at least one Radio Resource Control (RRC) Connection Reconfiguration message from an eNB.

5. The method of claim 1 , further comprising:
detecting, by the WTRU, that at least one discovery signal property is below a threshold; and
initiating, by the WTRU, a handover to an infrastructure path.

6. The method of claim 1 , further comprising:
receiving, by the WTRU, a security configuration for D2D communication;
determining, by the WTRU, security parameters applicable to the D2D communication; and
activating, by the WTRU, security for the D2D communication.

7. A wireless transmit/receive unit (WTRU) comprising:
a receiver configured to receive, using a long term evolution (LTE) radio access technology (RAT), discovery related configuration information, wherein the discovery related configuration information includes discovery filtering information and information for a non-LTE RAT;
the receiver configured to monitor a device-to-device (D2D) communication interface on the non-LTE RAT based on the discovery filtering information;
a transmitter configured to transmit, using the LTE RAT, a report based on the discovery filtering information, wherein the report includes information associated with the discovery filtering information;
the receiver configured to receive, using the LTE RAT, a message to allow the WTRU to establish a D2D communication link with another WTRU using the non-LTE RAT; and
the WTRU configured to communicate, using the non-LTE RAT, on the D2D communication link with the another WTRU based on the received message.

8. The WTRU of claim 7 , further comprising:
the transmitter further configured to trigger a measurement report to an eNB.

9. The WTRU of claim 7 , further comprising:
the receiver further configured to receive a proximity detection configuration from an eNB.

10. The WTRU of claim 7 , wherein the D2D communication link is further based on receiving at least one Radio Resource Control (RRC) Connection Reconfiguration message from an eNB.

11. The WTRU of claim 7 , further comprising:
the receiver further configured to detect that at least one discovery signal property is below a threshold; and
the WTRU further configured to initiate a handover to an infrastructure path.

12. The WTRU of claim 7 , further comprising:
the receiver further configured to receive a security configuration for D2D communication;
a processor configured to determine security parameters applicable to the D2D communication; and
the processor further configured to activate security for the D2D communication.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Raghothaman Balaji
• Pragada Ravikumar V
• Deng Zhuorong
• Pani Diana
• Pelletier Ghyslain
• Poitau Gwenael
• Vanganuru Kiran K
• Sternberg Gregory S

Classifications

• H04W76/18

  Management of setup rejection or failure · CPC title

• H04W36/305

  Handover due to radio link failure (control signalling for hand-off failure H04W36/0079) · CPC title

• H04W8/005

  Discovery of network devices, e.g. terminals · CPC title

• H04W76/14 Primary

  Direct-mode setup · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title