Method and apparatus for limiting peer-to-peer communication interference

• US 8,295,871 B2
• Filed: 11/11/2005
• Issued: 10/23/2012
• Est. Priority Date: 11/11/2005
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Axnäs, Johan, Furuskär, Anders, de Bruin, Peter
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US12/093,298
• Publication Number:
  US 20080318612A1
• Time in Patent Office: 2,538 Days
• Field of Search: 455/41.2, 455/41.3, 455/418, 455/420, 455/522, 455 68- 70, 455/115.3, 455/127.1, 455/135, 455/296, 455/428
• US Class Current: 455/522
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

Peer-to-peer communication between user terminals in a licensed spectrum is enabled by a method comprising the following steps: —communicating directly, peer-to-peer, between the first and the second mobile terminal, and —disconnecting the peer-to-peer communication in dependence of control signals received or not received from the base station. Thus, according to the invention, the network is enabled to control the peer-to-peer communication between two user terminals.

Claims

1. A mobile terminal for use in a wireless communication network said terminal comprising means for communicating with a base station in said communication network, said mobile terminal comprising:

communication means for initiating direct communication directly with another mobile terminal, the communication means being arranged to probe a power level by transmitting probing signals with a gradually increasing transmission power level, wherein each probing signal includes a peer-to-peer identifier that identifies the probing signal as a peer-to-peer communication,

interference means for identifying interference from peer-to-peer communication in the wireless communication network and for reporting said interference to the base station, and

control means for disconnecting said direct communication in dependence of signals received or not received from the base station, wherein the signals comprise messages indicating whether the mobile terminal is allowed to initiate peer-to-peer communication.

2. A mobile terminal according to claim 1, wherein the peer-to-peer identifier is a single bit indicating that the communication is peer-to-peer communication.

3. A mobile terminal according to claim 1, wherein the peer-to-peer identifier is a unique identifier for the peer-to-peer communication session.

4. A mobile terminal according to claim 1, further comprising interference means for identifying interference from peer-to-peer communication in the wireless communication network and for reporting said interference to the base station.

5. A base station for use in a wireless communication network, said base station comprising communication means for communicating with at least one mobile terminal in the mobile communication network, said base station further comprising control means for controlling peer-to-peer communication between at least a first and a second mobile terminal in the network by:

receiving, at the base station interference information from at least a third mobile terminal in the network, wherein the interference information indicates an amount of interference experienced by the third mobile terminal that is caused or would be caused by peer-to-peer communication between the first mobile terminal and the second mobile terminal; and

transmitting to at least one of the first and the second terminals at least one signal indicating, based on the interference information received from the third mobile terminal, whether or not the at least one mobile terminal may engage in peer-to-peer communication.

6. A base station according to claim 5, wherein the control means is arranged to send said at least one signal in response to a request received from the first terminal.

7. A base station according to claim 5, wherein the control means is arranged to send a signal if peer-to-peer communication is allowed.

8. A base station according to claim 5 wherein the control means is arranged to send a signal if peer-to-peer communication is not allowed.

9. A method of establishing communication between a first and a second mobile terminal in a wireless communication network, said method comprising the following steps:

probing to determine a power level for peer-to-peer communication by transmitting probing signals with a gradually increasing transmission power level, wherein each probing signal includes a peer-to-peer identifier that identifies the probing signal as a peer-to-peer communication;

communicating directly, peer-to-peer, between the first and the second mobile terminal;

disconnecting the peer-to-peer communication in dependence of control signals received or not received from the base station, wherein the signals comprise messages indicating whether the mobile terminal is allowed to initiate peer-to-peer communication;

identifying interference from peer-to-peer communication in the wireless communication network based on one or more probing messages received from a third mobile terminal; and

reporting said interference to the base station.

10. A method according to claim 9, further comprising the step of the first mobile terminal signaling to a base station in the wireless network to request permission to communicate directly with the second mobile terminal before starting peer-to-peer communication.

11. A method according to claim 9, further comprising the step of disconnecting the peer-to-peer communication if a remove signal is received from the base station.

12. A method according to claim 9, further comprising the step of reducing the power used for peer-to-peer communication if a reduce signal is received from the base station.

13. A method according to claim 9, further comprising the step of disconnecting the peer-to-peer communication if an ok signal is not received from the base station.

14. A method of managing peer-to-peer communication in a wireless communication network, the method comprising:

receiving, at a base station, interference information from at least a third mobile terminal in the network, wherein the interference information indicates an amount of interference experienced by the third mobile terminal that is caused or would be caused by peer-to-peer communication between a first mobile terminal and a second mobile terminal; and

transmitting to at least one of the first mobile terminal and the second mobile terminal at least one signal indicating, based on the interference information received from the third mobile terminal, whether or not the at least one mobile terminal may engage in peer-to-peer communication.

15. A method according to claim 14, wherein transmitting said at least one signal comprises transmitting said at least on signal in response to a request received from the first terminal.

16. A method according to claim 14, wherein transmitting said at least one signal comprises transmitting said at least one signal if peer-to-peer communication is allowed.

17. A method according to claim 14, wherein transmitting said at least one signal comprises transmitting said at least one signal if peer-to-peer communication is not allowed.