Communication network with relaying of radio signals by relay terminals

• US 8,213,350 B2
• Filed: 05/18/2005
• Issued: 07/03/2012
• Est. Priority Date: 07/08/2004
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Courseille, Olivier
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): Elhag, Magdi
• Application Number:
  US11/571,809
• Publication Number:
  US 20080311904A1
• Time in Patent Office: 2,603 Days
• Field of Search: 455/427, 455/11.1, 455/12.1, 455/13.1, 455/13.2, 455/7, 455/10, 455/225, 370/315, 370/316, 370/317, 370/326
• US Class Current: 370/315
• CPC Class Codes: H04B 7/18536 Shadowing compensation therefor, e.g. by using an additional terrestrial relay

Abstract

A radiocommunication network includes at least one communication station (GW) adapted to exchange data by radio with radiocommunication terminals (T1-T5). This network is adapted to use a data transmission method wherein, each time a source radiocommunication terminal (T1) wishes to transmit data to its communication station (GW), the identifier of at least one active neighbor relay communication terminal (T2, T3) is determined in the source terminal (T1) in order to transmit signals representing the data to be transmitted by radio to each relay terminal so determined so that it relays them to the communication station (GW).

Claims

1. A method for data transmission in a radio communication network with respect to a source terminal adapted to transmit a radio signal carrying data to a communication station, the method comprising:

a) at a source terminal, determining an identifier of at least one relay terminal associated with the radio communication network, wherein the at least one relay terminal is capable of relaying radio signals transmitted by the source terminal to the communication station;

b) at the source terminal, selecting the at least one relay terminal for relaying a radio signal from the source terminal to the communication station; and

c) transmitting data carried by the radio signal from the source terminal directly to the communication station and from the source terminal to the communication station via the at least one relay terminal;

wherein the radio signals transmitted in c) are received at said communication station and combined in the communication station to form a combined signal having increased energy in relation to the individual radio signals transmitted in c).

2. Method according to claim 1, further comprising:

d) performing a) through c) for at least two relay terminals.

3. Method according to claim 2, wherein two or more relay terminals to which the radio signal is transmitted in c) and d) determine an identifier of at least one other relay terminal to which the two or more relay terminals relay the corresponding radio signal such that at least some radio signals transmitted in c) and d) are transmitted from the source terminal to the communication terminal via the two or more relay terminals and the at least one other relay terminal.

4. Method according to claim 1, wherein at least one of said source terminal and one or more of said at least one relay terminal are mobile communication terminals.

5. Method according to claim 1, wherein one or more of the at least one relay terminal is a fixed terminal dedicated to relaying the radio signal carrying data transmitted in c).

6. The method according to claim 1 wherein the transmitting in c) directly from the source terminal to the communication station is via a communication satellite such that a first portion of radio signals transmitted in c) is via the communication satellite and wherein one or more relay terminal to which the radio signal is transmitted in c) relay the corresponding radio signal from the source terminal to the communication satellite such that a second portion of radio signals transmitted in c) is via the one or more relay terminal and the communication satellite.

7. Method according to claim 6, wherein the first and second portions of radio signals transmitted in c) are received at the communication satellite and combined in said communication satellite to form a combined signal in order to relay the combined signal to said communication station, the combined signal having increased energy in relation to the individual radio signals in the first and second portions of radio signals received by the communication satellite.

8. The method according to claim 2 wherein the radio signals transmitted in c) and d) are received at the communication station and combined in the communication station to form a combined signal having increased energy in relation to the individual radio signals transmitted in c) and d).

9. The method according to claim 3 wherein a first portion of the radio signals transmitted in c) and d) via the at least one other relay terminal are received at a first other relay terminal and combined in the first other relay terminal to form a combined signal in order to relay the combined signal to the communication station, the combined signal having increased energy in relation to the individual radio signals in the first portion of radio signals received by the first other relay terminal.

10. A method for data transmission in a radio communication network with respect to a communication station adapted to transmit radio signals carrying data to a destination terminal, the method comprising:

a) at a communication station, determining an identifier of at least one relay terminal associated with the radio communication network, wherein the at least one relay terminal is capable of relaying radio signals transmitted by the communication station to the destination terminal;

b) at the communication station, selecting the at least one relay terminal for relaying a radio signal from the communication station to the destination terminal; and

c) transmitting data carried by the radio signal from the communication station directly to the destination terminal and from the communication station to the destination terminal via the at least one relay terminal;

wherein the radio signals transmitted in c) are received at said destination terminal and combined in the destination terminal to form a combined signal having increased energy in relation to radio signal transmitted in c).

11. The method according to claim 10 wherein the transmitting in c) from the communication station to the destination terminal is via a communication satellite such that the communication satellite is capable of relaying the radio signal transmitted in c) from the communication station via the communication satellite directly to the destination terminal and from the communication station to the destination terminal via the communication satellite and the at least one relay terminal.

12. Method according to claim 11, wherein the identifier of the at least one relay terminal determined in a) is determined in said communication satellite rather than the communication station and the at least one relay terminal selected in b) is selected by the communication satellite rather than the communication station.

13. Method according to claim 10, further comprising:

d) performing a) through c) for at least two relay terminals.

14. The method according to claim 13 wherein the radio signals transmitted in c) and d) are received at the destination terminal and combined in the destination terminal to form a combined signal having increased energy in relation to the individual radio signals transmitted in c) and d).

15. Method according to claim 13, wherein two or more relay terminals to which the radio signal is transmitted in c) and d) determine an identifier of at least one other relay terminal to which the two or more relay terminals relay the corresponding radio signal such that at least some radio signals transmitted in c) and d) are transmitted from the communication station to the destination station via the two or more relay terminals and the at least one other relay terminal.

16. Method according to claim 15, wherein a first portion of the radio signals transmitted in c) and d) via the at least one other relay terminal are received at a first other relay terminal and combined in the first other relay terminal to form a combined signal in order to relay the combined signal to said destination terminal, the combined signal having increased energy in relation to the individual radio signals in the first portion of radio signals received by the first other relay terminal.

17. Method according to claim 10, wherein one or more of the at least one relay terminal is a fixed terminal dedicated to relaying the radio signals carrying data transmitted in c).

18. A communication terminal in a radio communication network and adapted to exchange data carried by radio signals with a communication station, the communication terminal comprising:

a management module to recognize outgoing data is to be transmitted to a communication station via a radio communication network and to determine an identifier of at least one relay terminal associated with the radio communication network, wherein the at least one relay terminal is capable of relaying radio signals transmitted by the communication terminal to the communication station, wherein the management module selects the at least one relay terminal for relaying a first radio signal from the communication terminal to the communication station;

a transceiver module in operative communication with the management module to transmit outgoing data carried by the first radio signal from the communication terminal directly to the communication station and from the communication terminal to the communication station via the at least one relay terminal, wherein the transceiver module also receives incoming data carried by a second radio signal from the communication station directly and from the communication station via one or more relay terminal; and

a processing module in operative communication with the transceiver module to combine the second radio signal carrying the incoming data received directly from said communication station and the second radio signal received from the communication station via the one or more other relay terminal to produce a combined signal that has increased energy in relation to the individual radio signals received by the transceiver module.

19. The communication terminal according to claim 18 wherein the second radio signal received directly from the communication station is received via a communication satellite such that the communication satellite is capable of relaying the second radio signal from the communication station directly to the communication terminal and from the communication station to the communication terminal via the one or more relay terminal.

20. The communication terminal according to claim 18, wherein the first radio signal carrying the outgoing data transmitted directly from the communication terminal to the communication station is via a communication satellite such that a first portion of the first radio signals carrying the outgoing data is transmitted via the communication satellite and wherein one or more relay terminal to which the first radio signal carrying the outgoing data is transmitted relay the corresponding first radio signal from the communication terminal to the communication satellite such that a second portion of the first radio signals carrying the outgoing data is transmitted via the one or more relay terminal and the communication satellite.

21. A communication satellite in a satellite communication network and adapted to facilitate exchange of data carried by radio signals between a communication station and a communication terminal, the communication satellite comprising:

a management module to recognize station data is to be transmitted from a communication station to a communication terminal via a satellite communication network and to determine an identifier of at least one relay terminal associated with the satellite communication network, wherein the at least one relay terminal is capable of relaying radio signals transmitted by the communication station from the communication satellite to the communication terminal, wherein the management module selects the at least one relay terminal for relaying a first radio signal from the communication satellite to the communication terminal;

a transceiver module in operative communication with the management module to receive station data carried by the first radio signal from the communication station and transmit station data carried by the first radio signal from the communication satellite directly to the communication terminal and from the communication satellite to the communication terminal via the at least one relay terminal, wherein the transceiver module also receives terminal data carried by a second radio signal from the communication terminal directly and from the communication terminal via one or more relay terminal; and

a processing module in operative communication with the transceiver module to combine the second radio signal received directly from the communication terminal and the second radio signal received from the one or more relay terminal to produce a combined signal that has increased energy in relation to the individual radio signals received by the transceiver module;

wherein the transceiver module transmits the combined signal to the communication station.

22. A first relay terminal in a radio communication network and adapted to facilitate exchange of data carried by radio signals between a communication station and a communication terminal, the first relay terminal comprising:

a management module to recognize station data is to be transmitted from a communication station to a communication terminal via a radio communication network and to determine a first identifier of at least one second relay terminal associated with the radio communication network, wherein the at least one second relay terminal is capable of relaying radio signals to the communication terminal that are transmitted by the communication station to the first relay terminal, wherein the management module also determines a second identifier of at least one third relay terminal associated with the radio communication network, wherein the at least one third relay terminal is capable of relaying radio signals to the first relay terminal that are transmitted by the communication station to the communication terminal via the first relay terminal, wherein the management module also recognizes terminal data is to be transmitted from the communication terminal to the communication station via the radio communication network and determines a third identifier of at least one fourth relay terminal associated with the radio communication network, wherein the at least one fourth relay terminal is capable of relaying radio signals to the communication station that are transmitted by the communication terminal to the first relay terminal, wherein the management module also determines a fourth identifier of at least one fifth relay terminal associated with the radio communication network, wherein the at least one fifth relay terminal is capable of relaying radio signals to the first relay terminal that are transmitted by the communication terminal to the communication station via the first relay terminal, wherein the management module selects the at least one third relay terminal for relaying a first radio signal from the communication station to the first relay terminal, selects the at least one second relay terminal for relaying the first radio signal from the first relay terminal to the communication terminal, selects the at least one fourth relay terminal for relaying a second radio signal from the first relay terminal to the communication station, and selects the at least one fifth relay terminal for relaying the second radio signal from the communication terminal to the first relay terminal;

a transceiver module in operative communication with the management module to receive station data carried by the first radio signal directly from the communication station and from the communication station via the at least one third relay terminal and transmit the station data carried by the first radio signal from the first relay terminal directly to the communication terminal and from the first relay terminal to the communication terminal via the at least one second relay terminal, wherein the transceiver module also receives terminal data carried by the second radio directly from the communication terminal and from the communication terminal via the at least one fifth relay terminal and transmits the terminal data carried by the second radio signal from the first relay terminal directly to the communication station and from the first relay terminal to the communication station via the at least fourth relay terminal; and

a processing module in operative communication with the transceiver module to combine the first radio signal received directly from the communication station and the first radio signal received from the at least one third relay terminal to produce a combined station signal that has increased energy in relation to the corresponding individual first radio signals received by the transceiver module, wherein the processing module also combines the second radio signal received directly from the communication terminal and the second radio signal received from the at least one fifth relay terminal to produce a combined terminal signal that has increased energy in relation to the corresponding individual second radio signals received by the transceiver module.

23. A communication station in a radio communication network and adapted to exchange data carried by radio signals with a communication terminal, the communication station comprising:

a management module to recognize outgoing data is to be transmitted to a communication terminal via a radio communication network and to determine an identifier of at least one relay terminal associated with the radio communication network, wherein the at least one relay terminal is capable of relaying radio signals transmitted by the communication station to the communication terminal, wherein the management module selects the at least one relay terminal for relaying a first radio signal from the communication station to the communication terminal;

a transceiver module in operative communication with the management module to transmit outgoing data carried by the first radio signal from the communication station directly to the communication terminal and from the communication station to the communication terminal via the at least one relay terminal, wherein the transceiver module also receives incoming data carried by a second radio signal directly from the communication terminal and from the communication terminal via one or more relay terminal; and

a processing module in operative communication with the transceiver module to combine the second radio signal received directly from the communication terminal and the second radio signal received from the communication terminal via the one or more relay terminal to produce a combined signal that has increased energy in relation to the individual radio signals received by the transceiver module.

24. The communication station according to claim 23, wherein the first radio signal carrying the outgoing data transmitted directly to the communication terminal is transmitted via a communication satellite such that the communication satellite is capable of relaying the first radio signal from the communication station directly to the communication terminal and from the communication station to the communication terminal via the one or more relay terminal.

25. The communication station according to claim 23 wherein the second radio signal received directly from the communication terminal is received via a communication satellite such that a first portion of the second radio signals carrying the incoming data are received via the communication satellite and wherein one or more relay terminal from which the second radio signal carrying the incoming data are received relay the corresponding second radio signal from the communication terminal to the communication satellite such that a second portion of the second radio signals carrying the incoming data are received via the one or more relay terminal and the communication satellite.