Terminal-to-terminal communication

• US 9,942,932 B2
• Filed: 01/07/2014
• Issued: 04/10/2018
• Est. Priority Date: 08/01/2013
• Status: Active Grant

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: Fujitsu Limited
• Inventors: Zhu, Chenxi, Ito, Akira
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Boakye, Alexander O
• Application Number:
  US14/909,077
• Publication Number:
  US 20160198505A1
• Time in Patent Office: 1,554 Days
• Field of Search: 370329
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 8/186 Processing of subscriber group data

Abstract

A method of performing a terminal-to-terminal communication includes performing a terminal-to-terminal transmission via a portion of a radio spectrum licensed for transmission of wireless data. The terminal-to-terminal transmission is transmitted without performing terminal-to-terminal discovery associated with the terminal-to-terminal transmission. The terminal-to-terminal transmission is configured to be received by a terminal without being routed through a base station. The method further includes checking for an acknowledgement sequence and checking for a negative acknowledgement sequence.

Claims

1. A method of performing a terminal-to-terminal communication, the method comprising:

receiving, at a first terminal, a resource allocation identifying resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery;

performing, at the first terminal, a terminal-to-terminal transmission via the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery, the terminal-to-terminal transmission configured to be received directly from the first terminal by a receiving terminal;

checking, at the first terminal, for an acknowledgement sequence; and

checking, at the first terminal, for a negative acknowledgement sequence.

2. The method of claim 1, wherein the terminal-to-terminal transmission includes a session number and the acknowledgement sequence includes the session number.

3. The method of claim 1, wherein transmitting the terminal-to-terminal transmission occurs via at least one of the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery.

4. The method of claim 1, wherein the resources allocated for terminal-to-terminal transmission without prior terminal-to-terminal discovery include terminal-to-terminal acknowledgement resources implicitly allocated with the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery.

5. The method of claim 4, wherein checking for the acknowledgement sequence and checking for the negative acknowledgement sequence includes monitoring at least one of the terminal-to-terminal acknowledgement resources.

6. The method of claim 1, further comprising:

failing to receive the acknowledgement sequence;

failing to receive the negative acknowledgement sequence; and

canceling a future terminal-to-terminal transmission.

7. The method of claim 1, further comprising:

receiving the acknowledgement sequence; and

transmitting a second terminal-to-terminal transmission without performing terminal-to-terminal discovery, the second terminal-to-terminal transmission transmitted with initial transmission parameters,

wherein the terminal-to-terminal transmission is transmitted with the initial transmission parameters.

8. The method of claim 1, further comprising:

receiving the negative acknowledgement sequence; and

transmitting a second terminal-to-terminal transmission without performing terminal-to-terminal discovery, the second terminal-to-terminal transmission transmitted with changed transmission parameters,

wherein the terminal-to-terminal transmission is transmitted with initial transmission parameters different from the changed transmission parameters.

9. A terminal including a non-transitory computer-readable medium having encoded therein programming code executable by a processor to perform operations comprising:

receiving a resource allocation identifying resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery;

performing a terminal-to-terminal transmission via the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery, the terminal-to-terminal transmission configured to be received directly from the terminal by another terminal;

checking for an acknowledgement sequence; and

checking for a negative acknowledgement sequence.

10. The terminal of claim 9, wherein the terminal-to-terminal transmission includes a session number and the acknowledgement sequence includes the session number.

11. The terminal of claim 9, wherein transmitting the terminal-to-terminal transmission occurs via at least one of the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery.

12. The terminal of claim 9, wherein the resources allocated for terminal-to-terminal transmission without prior terminal-to-terminal discovery include terminal-to-terminal acknowledgement resources implicitly allocated with the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery.

13. The terminal of claim 12, wherein checking for the acknowledgement sequence and checking for the negative acknowledgement sequence includes monitoring at least one of the terminal-to-terminal acknowledgement resources.

14. The terminal of claim 9, the operations further comprising:

failing to receive the acknowledgement sequence;

failing to receive the negative acknowledgement sequence; and

canceling a future terminal-to-terminal transmission.

15. The terminal of claim 9, the operations further comprising:

receiving the acknowledgement sequence; and

transmitting a second terminal-to-terminal transmission without performing terminal-to-terminal discovery, the second terminal-to-terminal transmission transmitted with initial transmission parameters,

wherein the terminal-to-terminal transmission is transmitted with the initial transmission parameters.

16. The terminal of claim 9, the operations further comprising:

receiving the negative acknowledgement sequence; and

transmitting a second terminal-to-terminal transmission without performing terminal-to-terminal discovery, the second terminal-to-terminal transmission transmitted with changed transmission parameters,

wherein the terminal-to-terminal transmission is transmitted with initial transmission parameters different from the changed transmission parameters.

17. A method of performing terminal-to-terminal communication without terminal-to-terminal discovery, the method comprising:

receiving, at a first terminal, a resource allocation identifying resources of a radio spectrum licensed for transmission of wireless data, the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery, the resources allocated for terminal-to-terminal transmissions including implicitly allocated terminal-to-terminal acknowledgement resources;

performing, at the first terminal, a plurality of terminal-to-terminal transmissions via the resources allocated for terminal-to-terminal transmissions without prior terminal-to-terminal discovery, the plurality of terminal-to-terminal transmissions configured to be received directly from the first terminal by a receiving terminal; and

monitoring the terminal-to-terminal acknowledgment resources, including checking, at the first terminal, for both an acknowledgement sequence and a negative acknowledgement sequence after transmitting each terminal-to-terminal transmission of the plurality of terminal-to-terminal transmissions.

18. The method of claim 17, further comprising:

failing to receive the acknowledgement sequence after each of the plurality of terminal-to-terminal transmissions;

failing to receive the negative acknowledgement sequence after each of the plurality of terminal-to-terminal transmissions; and

canceling a future terminal-to-terminal transmission.