Distributed scheduling for device-to-device communication

• US 10,462,802 B2
• Filed: 08/06/2014
• Issued: 10/29/2019
• Est. Priority Date: 08/07/2013
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Marinier, Paul, Pelletier, Benoit, Rudolf, Marian, Pani, Diana, Poitau, Gwenael, Pelletier, Ghyslain, Tu, Chao-Cheng
• Primary Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US14/910,285
• Publication Number:
  US 20160183276A1
• Time in Patent Office: 1,910 Days
• Field of Search: None
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

Systems, methods, and instrumentalities are provided to implement scheduling for device-to-device (D2D). A WTRU (e.g., a D2D WTRU) may determine whether the WTRU has D2D data to transmit. The WTRU may determine a set of allowed SA resources and/or allowed D2D data resources for transmission of the SA. The WTRU may select an SA resource and/or D2D data resources (e.g., from the set of allowed SA resources and/or D2D data resources) for transmission. The WTRU may select one or more transmission parameters. The WTRU may select one or more transmission patterns. The WTRU may transmit D2D data over the set of allowed D2D resources using the selected transmission patterns and according to the selected transmission parameters.

Claims

1. A first wireless transmit/receive unit (WTRU) comprising:

a processor;

a memory comprising instructions that when executed by the processor cause the first WTRU to;

determine whether the first WTRU has D2D data to transmit to a second WTRU; and

on a condition that the first WTRU has D2D data to transmit to the second WTRU;

autonomously select a subset of scheduling assignment (SA) resources for transmission of an SA to the second WTRU from a pre-configured set of allowed SA resources,

transmit the SA to the second WTRU according to a first transmission period using the autonomously selected subset of SA resources;

determine a set of allowed device-to-device (D2D) data resources for D2D data transmission to the second WTRU,

autonomously select one or more transmission patterns for D2D data transmission to the second WTRU,

autonomously select one or more transmission parameters for D2D data transmission to the second WTRU, and

transmit D2D data to the second WTRU over the set of allowed D2D data resources according to a second transmission period using the autonomously selected one or more transmission patterns, and according to the autonomously selected one or more transmission parameters.

2. The first WTRU of claim 1, wherein transmitting the D2D data to the second WTRU comprises transmitting data mapped to a D2D service.

3. The first WTRU of claim 1, wherein a transmission pattern comprises a time pattern.

4. The first WTRU of claim 1, wherein autonomously selecting the one or more transmission patterns comprises autonomously selecting the one or more transmission patterns from a pre-configured set of transmission patterns.

5. The first WTRU of claim 4, wherein autonomously selecting the one or more transmission patterns is based on one or more of a WTRU ID, a transmission pattern index, a transmission parameter, or a scheduling assignment (SA) resource.

6. The first WTRU of claim 4, wherein the set of allowed D2D data resources for D2D data transmission, the one or more transmission patterns for D2D data transmission, and the one or more transmission parameters for D2D data transmission are indicated in the SA transmission to the second WTRU.

7. The first WTRU of claim 1, wherein the transmission parameters comprise one or more of Transport Block Size (TBS), modulation and coding scheme (MCS), bandwidth (BW), number of Physical Resource Blocks (PRBs), number of HARQ processes, inter-PDU interval time, or number of HARQ transmissions.

8. The first WTRU of claim 1, wherein the processor is configured to determine the set of allowed D2D resources or allowed SA resources based on a signal received from a second WTRU, wherein the signal is received via a D2D channel using a D2D related control message.

9. The first WTRU of claim 1, wherein the set of allowed D2D data resources for D2D data transmission to the second WTRU or the set of allowed SA resources for transmission of an SA to the second WTRU are pre-configured.

10. The first WTRU of claim 1, wherein the processor is configured to randomly select the subset of SA resources for transmission from the set of allowed SA resources.

11. A device-to-device (D2D) communication method comprising:

determining whether a first WTRU has D2D data to transmit to a second WTRU; and

on a condition that the first WTRU has D2D data to transmit to the second WTRU;

autonomously selecting a subset of scheduling assignment (SA) resources for transmission of an SA from a pre-configured set of allowed SA resources,

transmit the SA to the second WTRU according to a first transmission period using the autonomously selected subset of SA resources according to determined transmission parameters,

determining a set of allowed D2D data resources for D2D data transmission to the second WTRU,

autonomously selecting one or more transmission patterns for D2D data transmission to the second WTRU,

autonomously selecting one or more transmission parameters for D2D data transmission to the second WTRU, and

transmitting D2D data to the second WTRU over the set of allowed D2D data resources according to a second transmission period using the autonomously selected transmission patterns, and according to the autonomously selected transmission parameters.

12. The method of claim 11, wherein transmitting the D2D data to the second WTRU comprises transmitting data mapped to a D2D service.

13. The method of claim 11, wherein a transmission pattern comprises a time pattern.

14. The method of claim 11, wherein autonomously selecting the one or more transmission patterns comprises autonomously selecting the one or more transmission patterns from a pre-configured set of transmission patterns.

15. The method of claim 14, wherein autonomously selecting the one or more transmission parameters is based on one or more of a WTRU ID, a transmission pattern index, a transmission parameter, or a scheduling assignment (SA) resource.

16. The method of claim 14, wherein the set of allowed D2D data resources for D2D data transmission, the one or more transmission patterns for D2D data transmission, and the one or more transmission parameters for D2D data transmission are indicated in the SA in the SA transmission to the second WTRU.

17. The method of claim 11, wherein the transmission parameters comprise one or more of Transport Block Size (TBS), modulation and coding scheme (MCS), bandwidth (BW), number of Physical Resource Blocks (PRBs), number of HARQ processes, inter-PDU interval time, or number of HARQ transmissions.

18. The method of claim 11, comprising determining the set of allowed D2D resources or allowed SA resources based on a signal received from a second WTRU, wherein the signal is received via a D2D channel using a D2D related control message.

19. The method of claim 11, wherein the set of allowed D2D data resources for D2D data transmission to the second WTRU or the set of allowed SA resources for transmission of an SA to the second WTRU are pre-configured.

20. The method of claim 11, comprising randomly selecting the subset of SA resources for transmission from the set of allowed SA resources.