System and method for hybrid automatic repeat request timing for device-to-device communication overlaid on a cellular network

• US 10,057,913 B2
• Filed: 06/30/2017
• Issued: 08/21/2018
• Est. Priority Date: 02/27/2012
• Status: Active Grant

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Liu, Deping, Sartori, Philippe, Classon, Brian, Desai, Vipul
• Primary Examiner(s): Eisner, Ronald
• Application Number:
  US15/638,841
• Publication Number:
  US 20170303294A1
• Time in Patent Office: 417 Days
• Field of Search: 4554221, 455450-455, 455464, 455509, 370328-337, 370339, 370341-348, 370431-463, 370389, 370400, 370406
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

An embodiment of a system for operating a communications controller for a group of user equipments engaged in a DMC link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes in one periodic group of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and transmit parameters related to a group of HARQ processes of the DMC link. In an embodiment, the communication controller uses HARQ processes for cellular UE transmission that are determined independently from HARQ processes of the group of HARQ processes for the DMC link, and the parameters are configured to enable the group of UEs to manage the group of HARQ processes for the DMC link.

Claims

1. A method of communicating between a group of user equipments (“

UEs”

) on a direct mobile communication (DMC) link, the method comprising;

a first UE of the group of UEs determining DMC resources for transmission, the group of UEs having a group ID;

the first UE scrambling data with a scrambling sequence defined by the group ID to generate scrambled data; and

the first UE transmitting the scrambled data using at least one subframe allocated to the first UE in the DMC resources.

2. The method of claim 1, further comprising transmitting, by the first UE to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation and a modulation and coding scheme (MCS).

3. The method of claim 1, further comprising transmitting, by the first UE to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation and a modulation and coding scheme (MCS), with the scheduling grant being valid in subsequent multiple subframes allocated to the group of UEs.

4. The method of claim 1, further comprising the first UE transmitting a demodulation reference signal (DMRS) sequence with the scrambled data, the DMRS sequence being defined by the group ID.

5. The method of claim 4, further comprising transmitting, by the first UE to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation and a modulation and coding scheme (MCS).

6. The method of claim 4, further comprising transmitting, by the first UE to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation and a modulation and coding scheme (MCS), the scheduling grant being valid in subsequent multiple subframes allocated to the group of UEs.

7. The method of claim 1, further comprising a preliminary step of the first UE receiving a DMC resource allocation.

8. The method of claim 1, wherein the DMC comprises device-centric DMC.

9. The method of claim 1, wherein the DMC comprises network-centric DMC.

10. The method of claim 1, wherein the group of UEs comprises single-link DMC.

11. The method of claim 1, wherein the group of UEs comprises multi-link DMC.

12. A first user equipment (UE), the first UE being a member of a group of UEs configured for a direct mobile communication (DMC) link, the first UE comprising:

a transceiver; and

a processor unit coupled to the transceiver, with the processor unit, in conjunction with the transceiver, configured to cause the first UE to;

determine DMC resources for transmission, the group of UEs having a group ID;

scramble data with a scrambling sequence defined by the group ID to generate scrambled data; and

transmit the scrambled data using at least one subframe allocated to the first UE in the DMC resources.

13. The first UE of claim 12, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to transmit, to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation and a modulation and coding scheme (MCS).

14. The first UE of claim 12, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to transmit, to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation modulation and coding scheme (MCS), with the scheduling grant being valid in subsequent multiple subframes allocated to the group of UEs.

15. The first UE of claim 12, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to transmit a demodulation reference signal (DMRS) sequence with the scrambled data, the DMRS sequence being defined by the group ID.

16. The first UE of claim 15, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to transmit, to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation, modulation and coding scheme (MCS).

17. The first UE of claim 15, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to transmit, to the group of UEs, a scheduling grant identified by the group ID to indicate a frequency resource allocation modulation and coding scheme (MCS), the scheduling grant being valid in subsequent multiple subframes allocated to the group of UEs.

18. The first UE of claim 12, further comprising the processor unit, in conjunction with the transceiver, configured to cause the first UE to preliminarily receive a DMC resource allocation.

19. The first UE of claim 12, wherein the DMC comprises device-centric DMC.

20. The first UE of claim 12, wherein the DMC comprises network-centric DMC.

21. The first UE of claim 12, wherein the group of UEs comprises single-link DMC.

22. The first UE of claim 12, wherein the group of UEs comprises multi-link DMC.