Wake-up for D2D communication

• US 10,448,332 B2
• Filed: 12/02/2015
• Issued: 10/15/2019
• Est. Priority Date: 12/02/2014
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lu, Qianxi, Li, Shaohua, Song, Xinghua, Sorrentino, Stefano, Wallentin, Pontus
• Primary Examiner(s): Faroul, Farah
• Application Number:
  US15/529,411
• Publication Number:
  US 20170325167A1
• Time in Patent Office: 1,413 Days
• Field of Search: None
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 92/18 between terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

There is disclosed a method for operating a wireless device (10), the wireless device (10) being D2D enabled. The method comprises entering, by the wireless device (10), an energy-saving mode; monitoring, by the wireless device (10), a pre-defined channel for a D2D wake-up signal at pre-defined times during the energy-saving mode; determining, by the wireless device (10), if a received wake-up signal is intended for the wireless device; and performing, by the wireless device (10), a wake-up procedure for D2D communication. There are also disclosed related devices and methods.

Claims

1. A method for operating a wireless device, the wireless device being enabled for device-to-device (D2D) operation, wherein the method comprises:

entering, by the wireless device, an energy-saving mode;

monitoring, by the wireless device, a pre-defined channel for a D2D wake-up signal at pre-defined times during the energy-saving mode;

determining, by the wireless device, whether a received wake-up signal is intended for the wireless device; and

performing, by the wireless device, a wake-up procedure of a plurality of wake-up procedures for D2D communication,

wherein said wake-up procedure is performed based on a selection of said wake-up procedure from the plurality of the wake-up procedures,

wherein the plurality of wake-up procedures includes a network node assisted Proximity Services (ProSe) wake-up procedure and a non-network node assisted Proximity Services (ProSe) wake-up procedure,

wherein said wake-up procedure is a function of plurality of factors according to a status of transmitting Tx UE, and

wherein the plurality of factors comprises coverage status, Radio Resource Control (RRC) states, Traffic type and UE category.

2. A method for operating a network node in a wireless communication network, the method comprising at least one of configuring a D2D enabled wireless device for at least one of the plurality of wake-up procedures and performing a method according to claim 1.

3. A network node for a wireless communication network, the network node configured to perform at least one of configuring a D2D enabled wireless device for at least one of the plurality of wake-up procedures and performing a method according to claim 1.

4. A wireless device for a wireless communication network, the wireless device being enabled for device-to-device (D2D) operation, wherein the wireless device comprises:

a control circuit; and

memory operatively connected to the control circuit and storing program code executable by the control circuit, wherein the wireless device is configured to;

enter an energy-saving mode;

monitor a pre-defined channel for a D2D wake-up signal at pre-defined times during the energy-saving mode;

determine whether a received wake-up signal is intended for the wireless device; and

perform a wake-up procedure of a plurality of wake-up procedures for D2D communication,

wherein said wake-up procedure is performed based on a selection of said wake-up procedure from the plurality of the wakeup procedures,

wherein the plurality of wake-up procedures includes a network node assisted Proximity Services (ProSe) wake-up procedure and a non-network node assisted Proximity Services (ProSe) wake-up procedure,

wherein said wake-up procedure is a function of plurality of factors according to a status of transmitting Tx UE, and

wherein the plurality of factors comprises coverage status, Radio Resource Control (RRC) states, Traffic type and UE category.

5. A non-transitory computer-readable medium comprising, stored thereupon, a code executable by control circuitry of a wireless device enabled for device-to-device (D2D) operation, the code causing the control circuitry to control the wireless device to:

enter an energy-saving mode;

monitor a pre-defined channel for a D2D wake-up signal at pre-defined times during the energy-saving mode;

determine whether a received wake-up signal is intended for the wireless device; and

perform a wake-up procedure for D2D communication,

wherein said wake-up procedure is performed based on a selection of said wake-up procedure from a plurality of the wake-up procedures,

wherein the plurality of wake-up procedures includes a network node assisted Proximity Services (ProSe) wake-up procedure and a non-network node assisted Proximity Services (ProSe) wake-up procedure,

wherein said wake-up procedure is a function of plurality of factors according to a status of transmitting Tx UE, and

wherein the plurality of factors comprises coverage status, Radio Resource Control (RRC) states, Traffic type and UE category.