Method for performing inter plmn discovery by a user equipment (ue) in device-to-device (d2d) communication

Patent metadata

Field	Value
Publication number	US-2016014590-A1
Application number	US-201514794612-A
Country	US
Kind code	A1
Filing date	Jul 8, 2015
Priority date	Jul 8, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

Embodiments herein provide a method for performing an inter Public Land Mobile Network (PLMN) discovery, by a User Equipment (UE), in Device to Device (D2D) communication. The method includes determining one or more PLMNs to monitor for receiving discovery information. Further, the method includes determining discovery resources configured in each of the one or more PLMNs. Furthermore, the method includes monitoring discovery resources configured in the one or more PLMNs to receive the discovery information.

First claim

What is claimed is:

1 . A method for performing an inter Public Land Mobile Network (PLMN) discovery, by a User Equipment (UE), the method comprising:
receiving information including a list of frequencies and corresponding PLMN identifiers (IDs) from a serving cell for monitoring for discovery information; determining at least one PLMN and at least one frequency to monitor for receiving the discovery information based on the list; and monitoring the at least one frequency to receive the discovery information.

2 . The method of claim 1 , wherein the at least one PLMN to monitor for receiving the discovery information is, received by the UE from a device to device (D2D) function in a home PLMN (HPLMN) in response to a discovery monitoring request.

3 . The method of claim 2 , wherein the D2D function in the HPLMN of the UE receives the at least one PLMN to monitor for receiving discovery the information from a D2D function in a HPLMN of a UE transmitting the discovery information.

4 . The method of claim 2 , wherein the at least one PLMN to monitor for receiving the discovery information is a registered PLMN of a UE transmitting the discovery information.

5 . The method of claim 2 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN where a UE transmitting the discovery information is authorized to announce.

6 . The method of claim 2 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN where a UE transmitting the discovery information is authorized to announce and the UE receiving the discovery information is authorized to monitor.

7 . The method of claim 2 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN which the UE is authorized to monitor.

8 . The method of claim 7 , wherein the at least one PLMN which the UE is authorized to monitor is received by the UE from the D2D function.

9 . The method of claim 1 , wherein the at least one frequency is discovery resources configured in each of the at least one PLMN.

10 . The method of claim 11 , wherein the at least one frequency is signaled by the serving cell of the UE in dedicated signaling.

11 . The method of claim 1 , wherein the UE monitors the at least one frequency to receive the discovery information during a discontinuous reception (DRX) mode.

12 . The method of claim 1 , wherein the UE monitors the at least one frequency to receive the discovery information using an additional receiver chain.

13 . The method of claim 1 , wherein receiving the list of frequencies and corresponding PLMN IDs and determining at least one PLMN and the at least one frequency to monitor comprises:
receiving the list including carrier frequencies along with the PLMN IDs identifying one or more PLMNs for each of the carrier frequencies in system information (SI) broadcasted by the serving cell; identifying a cell on each carrier frequency in the received list of carrier frequencies corresponding to the at least one PLMN; and determining the at least one frequency as discovery resources in each of the identified cell, wherein the UE receives the discovery resources from the SI broadcasted by the identified cell.

14 . The method of claim 1 , wherein receiving the list of frequencies and corresponding PLMN IDs and determining at least one PLMN and the at least one frequency to monitor comprises:
receiving the list including carrier frequencies along with the PLMN IDs identifying one or more PLMNs for each of the carrier frequencies in system information (SI) broadcasted by the serving cell; identifying a cell on each carrier frequency in which the UE is configured to monitor discovery, wherein the UE prioritizes frequencies included in the received list of frequencies corresponding to the at least one PLMN; and determining the at least one frequency as discovery resources in each of the identified cell, wherein the UE receives the discovery resources from System Information (SI) broadcasted by the identified cell.

15 . The method of claim 13 , wherein the PLMN IDs are broadcast in a system information block (SIB).

16 . A user equipment (UE) for performing an inter Public Land Mobile Network (PLMN) discovery, the UE comprising:
a receiver configured to receive information including a list of frequencies and corresponding PLMN identifiers (IDs) from a serving cell for monitoring for discovery information; and a controller configured to:
determine at least one PLMN and at least one frequency to monitor receiving discovery information based on the list;
determine discovery resources configured in each of the at least one PLMN; and
monitor the at least one frequency to receive the discovery information.

17 . The UE of claim 16 , wherein the at least one PLMN to monitor for receiving the discovery information is, received by the UE from a device to device (D2D) function in a home PLMN (HPLMN) in response to a discovery monitoring request.

18 . The UE of claim 17 , wherein the at least one PLMN to monitor for receiving discovery information is a registered PLMN of a UE transmitting the discovery information.

19 . The UE of claim 17 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN where a UE transmitting the discovery information is authorized to announce.

20 . The UE of claim 17 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN where a UE transmitting the discovery information is authorized to announce and the UE receiving the discovery information is authorized to monitor.

21 . The UE of claim 17 , wherein the at least one PLMN to monitor for receiving the discovery information is the at least one PLMN which the UE is authorized to monitor.

22 . The UE of claim 21 , wherein the at least one PLMN which the UE is authorized to monitor is received by the UE from the D2D function.

23 . The UE of claim 16 , wherein the at least one frequency is discovery resources configured in each of the at least one PLMN is broadcasted by a serving cell of the UE.

24 . The UE of claim 16 , wherein the at least one frequency is signaled by a serving cell of the UE in dedicated signaling.

25 . The UE of claim 16 , wherein the UE monitors the at least one frequency to receive the discovery information during a discontinuous reception (DRX) mode.

26 . The UE of claim 16 , wherein the UE monitors the at east one frequency to receive the discovery information using an additional receiver chain.

27 . The UE of claim 16 , wherein:
the transceiver is configured to receive the list including carrier frequencies along with the PLMN IDs identifying one or more PLMNs for each of the carrier frequencies in system information (SI) broadcasted by the serving cell; the controller is configured to identify a cell on each carrier frequency in the received list of carrier frequencies corresponding to the at least one PLMN; and determine the at least one frequency as discovery resources in each of the identified cell: and the UE receives the discovery resources from the SI broadcasted by the identified cell.

28 . The UE of claim 16 , wherein:
the transceiver is configured to receive the list including carrier frequencies alon

Assignees

• Samsung Electronics Co Ltd

Inventors

• Agiwal Anil
• Chang Young-Bin

Classifications

• H04W72/51

  based on terminal or device properties · CPC title

• H04W92/18

  between terminal devices · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• H04W72/02

  Selection of wireless resources by user or terminal · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title