METHOD OF COOPERATIVELY RELAYING DATA IN CELLULAR NETWORKS FOR A BROADCAST MULTICAST SERVICES

• US 20070070953A1
• 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, Yoon, Young, Yi, Byung, Paik, Woo
• Granted Patent: US 7,715,787 B2
• Time in Patent Office: Days
• US Class Current: 370/334
• CPC Class Codes: H04B 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/0891 Space-time diversity rake receivers H04B1/7115; space-time decoding H04L1/0631
• CPC Class Codes: H04B 7/15592 Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path cooperative diversity H04B7/024
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 1/0625 Transmitter arrangements
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: H04W 92/16 Interfaces between hierarchically similar devices

Abstract

A method of transmitting subpackets in a mobile communication system using at least one frequency carrier is disclosed. More specifically, the method comprises receiving a first broadcast subpacket from a base station (BS) at a first time slot on a first frequency carrier, and receiving at least one subsequent broadcast subpacket from the BS via at least one relay station (RS) at a second time slot on a second frequency carrier, wherein information of the first broadcast subpacket and the subsequent broadcast subpacket are the same.

Claims

1. A method of receiving subpackets in a mobile communication system using at least two frequency carriers, the method comprising:

receiving a first broadcast subpacket from a base station (BS) at a first time slot on a first frequency carrier; and

receiving at least one subsequent broadcast subpacket from the BS via at least one relay station (RS) at a second time slot on a second frequency carrier, wherein information of the first broadcast subpacket and the at least one broadcast subpacket are the same.

2. The method of claim 1, wherein the at least one subsequent broadcast subpacket is at least one of a space-time coded version of the first broadcast subpacket, a repetition of the first broadcast subpacket, and a broadcast subpacket having different parity bits than that of the first broadcast subpacket.

3. The method of claim 1, wherein the at least one subsequent broadcast subpacket is an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received broadcast subpacket.

4. The method of claim 1, wherein the at least one subsequent broadcast subpacket has different parity bits than parity bits of the first broadcast subpacket.

5. The method of claim 1, wherein the RS has at least one antenna through which the space-time coded subsequent broadcast subpacket is transmitted.

6. The method of claim 1, wherein the RS has at least one antenna through which an amplified first broadcast subpacket, which has stronger signal strength than the signal strength of the first received subpacket, is transmitted.

7. The method of claim 1, wherein the RS has at least one antenna through which at least one subsequent broadcast subpacket having different parity bits than parity bits of the first broadcast subpacket is transmitted.

8. The method of claim 1, wherein the at least two relay stations transmit a first of the at least one subsequent broadcast subpacket, which is a space-time coded first broadcast subpacket, from a first RS, and a second of the at least one subsequent broadcast subpacket, which is an amplified first broadcast subpacket, from a second RS.

9. The method of claim 8, wherein the amplified first broadcast subpacket has stronger signal strength than the signal strength of the first received subpacket.

10. The method of claim 1, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS.

11. A method of receiving subpackets in a mobile communication system using a single frequency carrier, the method comprising:

receiving a first broadcast subpacket from a base station (BS) at a first time slot; and

receiving at least one subsequent broadcast subpacket from at least one relay station (RS) and the BS at a second time slot, wherein information of the first broadcast subpacket and the subsequent broadcast subpacket are same and wherein the at least one subsequent broadcast subpacket is received on the single frequency carrier.

12. The method of claim 11, wherein the at least one subsequent broadcast subpacket is at least one of a space-time coded version of the first broadcast subpacket, a repetition of the first broadcast subpacket, and a broadcast subpacket having different parity bits than that of the first broadcast subpacket.

13. The method of claim 11, wherein the at least one subsequent broadcast subpacket is an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received broadcast subpacket.

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

15. The method of claim 11, wherein the RS has at least one antenna through which the space-time coded subsequent broadcast subpacket is transmitted.

16. The method of claim 11, wherein the RS has at least one antenna through which an amplified first broadcast subpacket, which has stronger signal strength than the signal strength of the first received subpacket, is transmitted.

17. The method of claim 11, wherein the RS has at least one antenna through which at least one subsequent broadcast subpacket having different parity bits than parity bits of the first broadcast subpacket is transmitted.

18. The method of claim 11, wherein the at least one relay station is configured to transmit a first of the at least one subsequent broadcast subpacket, which is a space-time coded first broadcast subpacket, from a first RS, and a second of the at least one subsequent broadcast subpacket, which is an amplified first broadcast subpacket, from a second RS.

19. The method of claim 18, wherein the amplified first broadcast subpacket has stronger signal strength than the signal strength of the first received subpacket.

20. The method of claim 11, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS.

21. The method of claim 11, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a second RS.

22. The method of claim 21, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.

23. The method of claim 11, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS

24. The method of claim 23, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.

25. The method of claim 11, wherein the at least one relay station is configure to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a second RS.

26. The method of claim 25, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.

27. A method of transmitting subpackets in a mobile communication system using at least one frequency carrier, the method comprising:

transmitting a first broadcast subpacket to a mobile station (MS) at a first time slot on a first frequency carrier; and

transmitting at least one subsequent broadcast subpacket to the MS via at least one relay station (RS) at a second time slot on a second frequency carrier, wherein information of the first broadcast subpacket and the subsequent broadcast subpacket are same.

28. The method of claim 27, wherein the at least one subsequent broadcast subpacket is a space-time coded first broadcast subpacket.

29. The method of claim 27, wherein the at least one subsequent broadcast subpacket is an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received subpacket.

30. The method of claim 27, wherein the at least one subsequent broadcast subpacket has different parity bits than parity bits of the first broadcast subpacket.

31. The method of claim 27, wherein the RS has at least one antenna which transmits the space-time coded at least one subsequent broadcast subpacket.

32. The method of claim 27, wherein the RS has at least one antenna which transmits an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received subpacket.

33. The method of claim 27, wherein the RS has at least one antenna which transmits the at least one subsequent broadcast subpacket having different parity bits than parity bits of the first broadcast subpacket.

34. The method of claim 27, wherein the at least two relay stations transmits the a first of the at least one subsequent broadcast subpacket, which is a space-time coded first broadcast subpacket, from a first RS, and a second of the at least subsequent broadcast subpacket, which is an amplified first broadcast subpacket, from a second RS.

35. The method of claim 34, wherein the amplified first broadcast subpacket has stronger signal strength than the signal strength of the first received subpacket.

36. The method of claim 27, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS.

37. A method of transmitting subpackets in a mobile communication system using a single frequency carrier, the method comprising:

transmitting a first broadcast subpacket to a mobile station (MS) at a first time slot; and

transmitting at least one subsequent broadcast subpacket to the MS via at least one relay station (RS) and the MS at a second time slot, wherein information of the first broadcast subpacket and the subsequent broadcast subpacket are same and wherein the at least one subsequent broadcast subpacket is transmitted on the single frequency carrier.

38. The method of claim 37, wherein the at least one subsequent broadcast subpacket is a space-time coded first broadcast subpacket.

39. The method of claim 37, wherein the at least one subsequent broadcast subpacket is an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received subpacket.

40. The method of claim 37, wherein the at least one subsequent broadcast subpacket has different parity bits than parity bits of the first broadcast subpacket.

41. The method of claim 37, wherein the RS has at least one antenna which transmits the space-time coded at least one subsequent broadcast subpacket.

42. The method of claim 37, wherein the RS has at least one antenna which transmits an amplified first broadcast subpacket which has stronger signal strength than the signal strength of the first received subpacket.

43. The method of claim 37, wherein the RS has at least one antenna which transmits at least one subsequent broadcast subpacket having different parity bits than parity bits of the first broadcast subpacket.

44. The method of claim 37, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS.

45. The method of claim 37, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a second RS.

46. The method of claim 45, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.

47. The method of claim 37, wherein the at least one relay station is configured to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a second RS

48. The method of claim 47, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.

49. The method of claim 37, wherein the at least one relay station is configure to transmit:

a first of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of a retransmitted broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, from a first RS; and

a second of the at least one subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of retransmitted broadcast subpacket or has different parity bits than parity bits of the retransmitted broadcast subpacket, from a second RS.

50. The method of claim 49, wherein the retransmitted broadcast subpacket is one of the subsequent broadcast subpacket, which is a space-time coded or a repeated broadcast subpacket of the first broadcast subpacket or has different parity bits than parity bits of the first broadcast subpacket, transmitted from the BS.