Method and system for frequency relaying

• US 8,681,684 B2
• Filed: 07/27/2010
• Issued: 03/25/2014
• Est. Priority Date: 06/28/2001
• Status: Expired due to Term

• Current Assignee: Kings College London (University of London)
• Original Assignee: Kings College London (University of London)
• Inventors: Aghvami, Abdol Hamid, Said, Fatin, Ghorashi, Seyed Ali, Dohler, Mischa
• Primary Examiner(s): Russell, Wanda Z
• Application Number:
  US12/844,099
• Publication Number:
  US 20110019608A1
• Time in Patent Office: 1,337 Days
• Field of Search: 370/315, 370/342, 370/347, 455/552
• US Class Current: 370/315
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 Policy-based network configuration management
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/46 in multi hop networks, e.g. wireless relay networks
• CPC Class Codes: H04W 84/22 with access to wired networks

Abstract

A method of transmitting data across an electronic data communication system comprising a plurality of terminals that can send and receive data in the form of electromagnetic waves to and from at least one of the terminals, which method comprises the steps of: (a) identifying at least one control terminal, at least one target terminal and at least two relaying terminals from the plurality of terminals; and (b) using the control terminal to instruct the at least two relaying terminals to receive and relay data intended for the at least one target terminal, so that the at least one target terminal can receive data directly from at least one terminal and from the at least two relaying terminals, thereby increasing capacity of the system.

Claims

1. A method of transmitting data between at least one information source and at least one information sink using electromagnetic waves, which method comprises the steps of:

(a) establishing a direct wireless communication link between the at least one information source and the at least one information sink using at least one first frequency band,

(b) identifying at least one information relay;

(c) instructing the at least one information relay to relay data received from the at least one information source intended for the at east one information sink on at least one second frequency band different to said at least one first frequency band;

(d) transmitting data directly from said at least one information source to said at least one information sink using said at least one first frequency band;

(e) the at least one information sink receiving said data on said at least one first frequency band and generating a first signal stream therefrom;

(f) the at least one information sink also receiving said same data on said at least one second frequency band and generating a second signal stream therefrom;

(g) the at least one information sink processing said first and second signal streams to recover said data.

2. A method as claimed claim 1, wherein at step (b) said information relay is instructed to relay said data on a different frequency band to that which it was received on.

3. A method as claimed in claim 1, further comprising the step of instructing the information relay to utilise time slot or code to ensure orthogonality between the channels on which the data is relayed and that on which it is received.

4. A method as claimed in claim 1, further comprising the step of instructing the information relay to relay data on its uplink frequency band.

5. A method as claimed in claim 4, wherein said information relay is instructed to re-program an uplink oscillator to relay on said uplink frequency band.

6. A method as claimed in claim 1, wherein said information source communicates with the information relay and the information sink on two different frequency bands for uplink and downlink, the method further comprising the step of instructing the information relay to relay on one of the downlink frequency bands.

7. A method as claimed in claim 1, wherein data is transmitted using a code division multiple access scheme by spreading data for u users, each of which can be an information source, sink and/or relay, with u distinct spreading codes, the method further comprising the step of instructing the users to relay u-1 data streams to the remaining u-1 users on a plurality of different frequency bands.

8. A method as claimed in claim 7, wherein the users are instructed to relay data on a u-1 frequency bands.

9. A method as claimed in claim 1, wherein data is transmitted using a time division multiple access scheme by sending data to u users, each of which can be an information source, sink and/or relay, during appropriate time slots and frequency bands, the method further comprising the steps of instructing the users to relay u-1 data streams to the remaining u-1 on a plurality of different time slots and unused frequency bands.

10. A non-transitory computer storage medium comprising computer executable instructions for carrying out a method as claimed in claim 1.

11. Apparatus comprising a controller and a transmitter, said controller being operable to transmit signals for performing a method as claimed in claim 1.

12. Apparatus as claimed in claim 11, wherein said transmitter comprises a plurality of antenna elements.

13. Apparatus as claimed in claim 11, further comprising receiving means and one or more programmable oscillators in addition to uplink and downlink oscillators for relaying signals received through said receiving means at an unused frequency band.

14. Apparatus as claimed in claim 11, wherein said transmitter is a base station, a mobile terminal, mobile telephone or a portable computer.

15. A subscriber identity module card comprising a non-transitory computer storage medium comprising computer readable instructions for performing a method as claimed in claim 1.