Allocating resources for a device-to-device transmission

Patent metadata

Field	Value
Publication number	US-2016338094-A1
Application number	US-201514712779-A
Country	US
Kind code	A1
Filing date	May 14, 2015
Priority date	May 14, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A method for allocating resources for device-to-device transmission between two or more user equipment (UEs) includes transmitting, from a first UE to a second UE, a resource allocation configuration for device-to-device communications. A resource request for a device-to-device transmission is received from the second UE. In response to the resource request, a resource for the device-to-device transmission is selected at the first UE. A resource grant is transmitted to the second UE. The resource grant identifies the selected resource. A device-to-device transmission is received from the second UE over the selected resource.

First claim

What is claimed is:

1 . A method for configuring radio resources and assigning a grant for device-to-device (D2D) transmissions between a first user equipment (UE) and a second UE, the method comprising:
determining that the first UE and the second UE are within D2D proximity, wherein at least one of the first UE or the second UE are outside of a network coverage; determining a configuration of the D2D radio resources; and assigning a grant from the determined D2D radio resources for the transmissions from the second UE to the first UE.

2 . The method of claim 1 , wherein determining the configuration of the D2D radio resources substantially reduces D2D transmission collisions between the first UE and the second UE.

3 . The method of claim 2 , wherein the substantial reduction includes avoiding collision of at least one subframe in the shared D2D resources of the first UE and the second UE.

4 . The method of claim 1 , wherein determining the D2D proximity includes discovery between the first UE and second UE.

5 . The method of claim 1 , further comprising:
receiving, by the first UE a transmission from the second UE, utilizing the assigned grant.

6 . The method of claim 1 wherein a base station determines the configuration of the D2D resources for transmissions between the first and the second UE.

7 . The method of claim 6 wherein the determining of the D2D resource configuration is based on Quality of Service (QoS) requirements for at least one of the first UE or second UE.

8 . The method of claim 6 wherein the base station substantially reduces transmission collisions of a Uu interface and D2D transmissions.

9 . The method of claim 6 wherein the base station determines the D2D resource configurations for the first UE and the second UE.

10 . The method of claim 6 wherein the base station indicates the determined configurations of the D2D resources for the first UE and the second UE over the downlink and the first UE indicates to the second UE a determined configuration for the second UE using a D2D transmission.

11 . The method of claim 1 wherein determining the D2D resource configuration is based on the preconfigured D2D transmission resource within the second UE.

12 . The method of claim 11 where in the pre-configured resource of the second UE is shared with at least one of the first UE and the base station.

13 . The method of claim 1 further comprising:
determining, by the first UE, the configuration of D2D radio resources for the second UE within the D2D radio resources configured by the base station;
indicating, by the first UE, the determined configuration for the second UE; and
selecting, by the second UE, a grant for D2D transmissions to the first UE from the indicated configuration.

14 . The method of claim 1 , wherein a base station assigns the grant; and
the first UE selects a second grant for the second UE within the grant given by the base station and the first UE indicates the second grant to the second UE.

15 . The method of claim 14 , wherein the grant by the base station and the second grant by the first UE are assigned based on at least one of a resource request from the second UE or a QoS required for the transmissions between the first and the second UE.

16 . The method of claim 14 , wherein at least one of the grants assigned by the base station and the second grant assigned by first UE is assigned semi-statically.

17 . The method of claim 1 , wherein the first UE assigns a grant for the second UE from the radio resources configured for D2D transmissions.

18 . The method of claim 17 further comprising the first UE indicates the assigned grant to the second UE based on a time resource pattern.

19 . The method of claim 17 , wherein the grant for the second UE is semi-statically assigned.

20 . A device, comprising:
a memory; and at least one hardware processor communicatively coupled with the memory and configured to:
determine that a first user equipment (UE) and a second UE are within D2D proximity, wherein at least one of the first UE or the second UE are outside of a network coverage;
determine a configuration of device-to-device (D2D) radio resources; and
assign a grant from the determined D2D radio resources for the transmissions from the second UE to the first UE.

21 . The device of claim 20 , wherein the configuration of the D2D resources for transmissions between the first and the second UE is determined by a base station.

22 . The device of claim 20 , wherein the at least one hardware processor is further configured to:
determine, by the first UE, the configuration of D2D radio resources for the second UE within the D2D radio resources configured by the base station; indicate, by the first UE, the determined configuration for the second UE; and wherein a grant for D2D transmissions to the first UE is selected from the indicated configuration.

23 . The device of claim 22 , wherein the grant is assigned by a base station, a second grant is selected by the first UE within the grant given by the base station for the second UE, and the second grant is indicated by the first UE to the second UE.

24 . The device of claim 23 , wherein the grant by the base station and the second grant by the first UE are assigned based on at least one of a resource request from the second UE or a QoS required for the transmissions between the first and the second UE.

25 . The device of claim 23 , wherein at least one of the grants assigned by the base station and the second grant assigned by first UE is assigned semi-statically.

26 . A tangible, non-transitory computer-readable medium containing instructions which, when executed, cause a computing device to perform operations comprising:
determining that the first UE and the second UE are within D2D proximity, wherein at least one of the first UE or the second UE are outside of a network coverage; determining a configuration of the D2D radio resources; and assigning a grant from the determined D2D radio resources for the transmissions from the second UE to the first UE.

27 . The tangible, non-transitory computer-readable medium of claim 26 , wherein the operations further comprise receiving, by the first UE a transmission from the second UE, utilizing the assigned grant.

28 . The tangible, non-transitory computer-readable medium of claim 26 , wherein the configuration of the D2D resources for transmissions between the first and the second UE is determined by a base station.

Assignees

• Blackberry Ltd

Inventors

• Faurie Rene
• Vutukuri Eswar
• Suzuki Takashi

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/04

  Wireless resource allocation · CPC title

• H04W8/005

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

• H04W72/121

  for groups of terminals or users · CPC title