Method for receiving D2D discovery information and apparatus

• US 10,244,471 B2
• Filed: 06/04/2018
• Issued: 03/26/2019
• Est. Priority Date: 05/09/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Lin, Bo, Zhang, Tao
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US15/997,208
• Publication Number:
  US 20180288700A1
• Time in Patent Office: 295 Days
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of the present disclosure provide a method for receiving D2D discovery information and an apparatus. The method for receiving D2D discovery information includes: sending, by an upper layer of a radio resource control RRC layer of a D2D communication device, a first instruction to a physical layer of the D2D communication device, where the first instruction is used to instruct the physical layer to switch from a D2D sleep state to a D2D listening state; and receiving, by the physical layer of the D2D communication device, the first instruction and switching from the D2D sleep state to the D2D listening state according to the first instruction, to listen to D2D discovery information. This reduces power consumption of the D2D communication device and prolongs a standby time of the D2D communication device.

Claims

1. A method for receiving device to device (D2D) discovery information, comprising:

obtaining, by a radio resource control, RRC, layer of a D2D communication device, D2D discovery resource configuration information by using a system broadcast message;

sending, by the RRC layer of the D2D communication device, a resource instruction to a physical layer of the D2D communication device, wherein the resource instruction includes the D2D discovery resource configuration information, and the resource instruction is used to instruct the physical layer of the D2D communication device to listen to the D2D discovery information on a D2D discovery resource corresponding to the D2D discovery resource configuration information;

sending, by an upper layer of the RRC layer of the D2D communication device, a first instruction to the RRC layer;

sending, by the RRC layer of the D2D communication device, the first instruction to the physical layer of the D2D communication device, where the first instruction is a receiving instruction; and

receiving, by the physical layer of the D2D communication device, the first instruction, and switching from a D2D sleep state to a D2D listening state according to the first instruction, to listen to the D2D discovery information.

2. The method according to claim 1, wherein:

the D2D discovery resource configuration information includes a cell identity and D2D discovery resource configuration information corresponding to the cell identity.

3. A device to device (D2D) communication device comprising:

a memory to store instructions; and

at least one processor to execute the instructions to cause the D2D communication device to implement;

a radio resource control (RRC) layer processing module configured to obtain D2D discovery resource configuration information by using a system broadcast message and configured to send a resource instruction to a physical layer processing module of the D2D communication device, wherein the resource instruction includes the D2D discovery resource configuration information, and the resource instruction is used to instruct the physical layer processing module of the D2D communication device to listen to D2D discovery information on a D2D discovery resource corresponding to the D2D discovery resource configuration information; and

an upper layer processing module of the RRC layer processing module configured to send a first instruction to the RRC layer processing module,

wherein the RRC layer processing module is further configured to send the first instruction to the physical layer processing module, where the first instruction is a receiving instruction; and

wherein the physical layer processing module is further configured to receive the first instruction, and is further configured to switch from a D2D sleep state to a D2D listening state according to the first instruction, to listen to the D2D discovery information.

4. The device according to claim 3, wherein:

the D2D discovery resource configuration information includes a cell identity and D2D discovery resource configuration information corresponding to the cell identity.

5. A non-transitory computer readable storage medium storing a program that, when executed by a computer, causes the computer to execute a method for receiving device to device (D2D) discovery information, comprising:

obtaining, by a radio resource control, RRC, layer of a D2D communication device, D2D discovery resource configuration information by using a system broadcast message;

sending, by the RRC layer of the D2D communication device, a resource instruction to a physical layer of the D2D communication device, wherein the resource instruction includes the D2D discovery resource configuration information, and the resource instruction is used to instruct the physical layer of the D2D communication device to listen to the D2D discovery information on a D2D discovery resource corresponding to the D2D discovery resource configuration information;

sending, by an upper layer of the RRC layer of the D2D communication device, a first instruction to the RRC layer;

sending, by the RRC layer of the D2D communication device, the first instruction to the physical layer of the D2D communication device, where the first instruction is a receiving instruction; and

receiving, by the physical layer of the D2D communication device, the first instruction, and switching from a D2D sleep state to a D2D listening state according to the first instruction, to listen to the D2D discovery information.

6. The non-transitory computer readable storage medium according to claim 5, wherein:

the D2D discovery resource configuration information includes a cell identity and D2D discovery resource configuration information corresponding to the cell identity.