Terminal-to-terminal communication

Patent metadata

Field	Value
Publication number	US-2016183251-A1
Application number	US-201414908858-A
Country	US
Kind code	A1
Filing date	Jan 7, 2014
Priority date	Aug 1, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

A method of enabling terminal-to-terminal communication includes organizing a cluster including a cluster head, a first cluster member, and a second cluster member. The first cluster member includes a first terminal. The second cluster member includes a second terminal. The cluster head is connected to the first cluster member and the second cluster member. The method further includes controlling a unicast communication from the first cluster member to the second cluster member via the cluster head.

First claim

What is claimed is:

1 . A method of enabling terminal-to-terminal communication, the method comprising:
organizing a cluster including a cluster head, a first cluster member including a first terminal, and a second cluster member including a second terminal, the cluster head being connected to the first cluster member and the second cluster member; and controlling a unicast communication from the first cluster member to the second cluster member via the cluster head.

2 . The method of claim 1 , wherein controlling the unicast communication from the first cluster member to the second cluster member via the cluster head includes:
receiving, at the cluster head from the first cluster member, a request for resources for a terminal-to-terminal data transmission from the first cluster member to the second cluster member; transmitting, from the cluster head to the first cluster member and the second cluster member, a control indicator configured to identify allocated resources for the terminal-to-terminal data transmission; and receiving, at the cluster head, feedback including:
a transmission status of the terminal-to-terminal data transmission, and
a reception status of the terminal-to-terminal data transmission.

3 . The method of claim 2 , wherein the cluster head includes a base station and transmitting the control indicator includes transmitting the control indicator via a physical downlink shared channel (PDSCH).

4 . The method of claim 2 , wherein the cluster head includes a third terminal and transmitting the control indicator includes transmitting the control indicator via a device-to-device physical shared channel (D2D-PSCH).

5 . The method of claim 2 , further comprising transmitting a device-to-device unicast radio-network temporary identifier (D2D-U-RNTI) to the first cluster member and the second cluster member, the D2D-U-RNTI associated with the terminal-to-terminal data transmission.

6 . The method of claim 2 , wherein the allocated resources include:
terminal-to-terminal data transmission resources; terminal-to-terminal feedback resources; a resource period; and a resource duration.

7 . The method of claim 6 , wherein the terminal-to-terminal data feedback resources include device-to-device physical feedback channel (D2D-PFBK) resources.

8 . The method of claim 2 , wherein the allocated resources are allocated via semi-persistent scheduling.

9 . The method of claim 2 , wherein controlling the unicast communication from the first cluster member to the second cluster member via the cluster head further includes transmitting a power control command to at least one of the first cluster member and the second cluster member such that the first cluster member and the second cluster member experience a bidirectional link.

10 . The method of claim 2 , wherein controlling the unicast communication from the first cluster member to the second cluster member via the cluster head further includes transmitting a second identification of updated allocated resources.

11 . The method of claim 10 , wherein controlling the unicast communication from the first cluster member to the second cluster member via the cluster head further includes receiving a second feedback including a second transmission status of the terminal-to-terminal data transmission via the updated allocated resources.

12 . The method of claim 11 , wherein controlling the unicast communication from the first cluster member to the second cluster member via the cluster head further includes transmitting a termination signal.

13 . A method of performing terminal-to-terminal communication, the method comprising:
transmitting a request for resources; receiving an identification of allocated resources; transmitting a terminal-to-terminal data transmission via the allocated resources; receiving an acknowledgement via the allocated resources; and transmitting feedback including a transmission status of the terminal-to-terminal data transmission.

14 . The method of claim 13 , wherein the allocated resources include:
terminal-to-terminal data transmission resources; terminal-to-terminal feedback resources; a resource period; and a resource duration.

15 . The method of claim 14 , wherein the terminal-to-terminal feedback resources are implicitly identified.

16 . The method of claim 13 , further comprising:
receiving a second identification of updated allocated resources; transmitting a second terminal-to-terminal data transmission via the updated allocated resources; and receiving a second acknowledgement via the updated allocated resources.

17 . The method of claim 16 , further comprising transmitting second feedback including a second transmission status of the terminal-to-terminal data transmission via the updated allocated resources.

18 . The method of claim 13 , further comprising receiving a termination signal.

19 . A terminal including a non-transitory computer-readable medium having encoded therein programming code executable by a processor to perform operations comprising:
transmitting a request for resources to perform a terminal-to-terminal communication; receiving an identification of allocated resources; transmitting a terminal-to-terminal data transmission via the allocated resources; receiving an acknowledgement via the allocated resources; and transmitting feedback including a transmission status of the terminal-to-terminal data transmission via the allocated resources.

20 . The terminal of claim 19 , wherein the allocated resources include:
terminal-to-terminal data transmission resources; terminal-to-terminal feedback resources; a resource period; and a resource duration.

Assignees

• Fujitsu Ltd

Inventors

• Zhu Chenxi
• Ito Akira

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/56

  based on priority criteria · CPC title

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/23

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

• H04W56/001

  Synchronization between nodes · CPC title