METHOD OF TRANSMITTING DATA IN CELLULAR NETWORKS USING COOPERATIVE RELAYING

• US 20070070954A1
• Filed: 09/28/2006
• Published: 03/29/2007
• Est. Priority Date: 09/28/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Sun, Li-Hsiang, Kim, Sang, Wang, Shu, Yoon, Young
• Granted Patent: US 7,995,512 B2
• Time in Patent Office: Days
• US Class Current: 370/334
• CPC Class Codes: H04B 7/0871 using different reception schemes, at least one of them being a diversity reception scheme
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0039 other detection of signalling, e.g. detection of TFCI explicit signalling H04L1/0046, H04L27/0012 and H04L25/0262 take precedence
• CPC Class Codes: H04L 1/0631 Receiver arrangements
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A method of transmitting data packets in a mobile communication system using at least one relay station (RS) and using at least two frequency carriers is disclosed. More specifically, the method comprises transmitting at least one subpacket of a first data packet to a mobile station (MS) on a first frequency carrier, and transmitting at least one subpacket of a second data packet to the MS via the at least one RS. Here, the at least one subpacket of second data packet from the at least one RS is transmitted on a second frequency carrier, a first subpacket of the first data packet and a first subpacket of the second data packet is transmitted via a main channel of the first frequency carrier and the main channel of the second frequency carrier, respectively, and at least one subsequent subpacket of the first data packet and at least one subsequent subpacket of the second data packet are transmitted via at least one assistant channel of the first frequency carrier and the at least one assistant channel of the second frequency carrier, respectively.

Claims

1. A method of transmitting data packets in a mobile communication system using at least one relay station (RS) and using at least two frequency carriers, the method comprising.

transmitting at least one subpacket of a first data packet to a mobile station (MS) on a first frequency carrier;

and

transmitting at least one subpacket of a second data packet to the MS via the at least one RS, wherein the at least one subpacket of second data packet from the at least one RS is transmitted on a second frequency carrier,

wherein a first subpacket of the first data packet and a first subpacket of the second data packet is transmitted via a main channel of the first frequency carrier and the main channel of the second frequency carrier, respectively, and

wherein at least one subsequent subpacket of the first data packet and at least one subsequent subpacket of the second data packet are transmitted via at least one assistant channel of the first frequency carrier and the at least one assistant channel of the second frequency carrier, respectively.

2. The method of claim 1, wherein the mobile communication system is a broadcast multicast service (BCMCS) system.

3. The method of claim 1, wherein the first data packet and the second data packet each comprises at least two subpackets.

4. The method of claim 1, wherein the at least one subsequent subpacket contains same information as the first subpacket.

5. The method of claim 1, wherein the at least one subpacket, which is transmitted via the at least one RS, is space-time coded.

6. The method of claim 1, wherein the at least one subsequent subpacket, which is transmitted via the RS, has different parity bits than parity bits of the first subpacket.

7. The method of claim 1, wherein the at least one subsequent subpacket, which is transmitted via the RS, is a same subpacket as the first subpacket.

8. The method of claim 1, wherein the at least one subsequent subpacket, which is transmitted via the RS, is transmitted using amplified signal strength to signal strength used to transmit the first subpacket.

9. The method of claim 1, wherein the at least one subsequent subpacket is space-time coded.

10. The method of claim 9, wherein the BS transmits the subsequent subpackets via multiple antennas.

11. The method of claim 1, wherein the at least one subsequent subpacket, which is transmitted via the RS, has different parity bits than parity bits of the first subpacket.

12. The method of claim 1, wherein the at least one subsequent subpacket is a same subpacket as the first subpacket.

13. The method of claim 1, wherein the at least one subsequent subpacket is transmitted using amplified signal strength to signal strength used to transmit the first subpacket.

14. The method of claim 1, wherein the at least one subpacket transmitted via the RS is transmitted at least one time slot after the transmission of the subpacket on the BS.

15. The method of claim 1, further comprising transmitting at least one subpacket of at least one subsequent data packet to the MS via the at least one subsequent RS, wherein the at least one subpacket of the at least one subsequent data packet from the at least one RS is transmitted on at least one subsequent frequency carrier.

17. The method of claim 11, wherein the mobile communication system is a broadcast multicast service (BCMCS) system.

18. The method of claim 11, wherein the at least one subsequent subpacket of the first data packet and the at least one subpacket of the second data packet are soft combined.

19. The method of claim 11, wherein the at least one subseqeunt subpacket of the first data packet and the at least one subpacket of the second data packet are soft combined at the same time slot.

20. The method of claim 11, wherein the at least one subsequent subpacket contains same information as the first subpacket.

21. The method of claim 11, wherein the at least one subsequent subpacket is space-time coded.

22. The method of claim 11, wherein the at least one subsequent subpacket has different parity bits than parity bits of the first subpacket.

23. The method of claim 11, wherein the at least one subsequent subpacket is a same subpacket as the first subpacket.

24. The method of claim 11, wherein the at least one subsequent subpacket is transmitted using amplified signal strength to signal strength used to transmit the first subpacket.

25. The method of claim 11, wherein the first data packet and the second data packet each comprises at least two subpackets.

16. A method of transmitting data packets in a mobile communication system using at least one relay station (RS) and using a single frequency carrier, the method comprising:

transmitting at least one subpacket of a first data packet to a mobile station (MS); and

transmitting at least one subpacket of a second data packet to the MS via the at least one RS,

wherein a first subpacket of the first data packet and a first subpacket of the second data packet is transmitted via a main channel, respectively, and

wherein at least one subsequent subpacket of the first data packet and at least one subsequent subpacket of the second data packet are transmitted via at least one assistant channel, respectively.