Apparatus and method for transmitting and receiving data in wireless communication system using relay

• US 10,021,545 B2
• Filed: 04/13/2015
• Issued: 07/10/2018
• Est. Priority Date: 09/29/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Heesoo, Ahn, Jae Young, Kim, Jae Heung, Ko, Young Jo, Lee, Kyoung Seok
• Primary Examiner(s): Ohri, Romani
• Application Number:
  US14/685,106
• Publication Number:
  US 20150223036A1
• Time in Patent Office: 1,184 Days
• Field of Search: 370312, 370329-332, 370432
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0087 when data requirements change
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

Disclosed are a data transmission/reception apparatus and method of a wireless communication system using a relay. The data transmission/reception apparatus of the relay sets a relay reception subframe (hereinafter, referred to as ‘relay-rx-subframe’), and reports, to a terminal within a cell coverage, that the set relay-rx-subframe is a Multicast Broadcast Single Frequency Network (MBSFN) subframe, so that a legacy terminal may be provided with services in a wireless communication system using the relay.

Claims

1. A communication method performed by a communication device, the communication method comprising:

transmitting, by the communication device, a first message to a terminal, the first message indicating that a first subframe is an MBSFN (Multicast Broadcast Single Frequency Network) subframe;

transmitting, by the communication device, a reference signal to the terminal during a first time period of the first subframe; and

receiving, by the communication device, a first data signal comprising first data from a base station during a second time period of the first subframe,

wherein the communication device transmits no reference signal to the terminal during the second time period.

2. The method of claim 1, wherein a length of the first time period corresponds to one or two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

3. The method of claim 1, wherein a length of the first time period corresponds to two OFDM symbols.

4. The method of claim 1, wherein a length of the first subframe corresponds to twelve (12) OFDM symbols.

5. The method of claim 1, wherein the second time period is a remainder of the first subframe subsequent to the first time period.

6. The method of claim 1, further comprising:

transmitting a second signal comprising the first data to the terminal,

wherein the terminal is a Long Term Evolution (LTE) Release-8 terminal.

7. The method of claim 1, wherein the first subframe is a relay reception subframe.

8. The communication method of claim 1, wherein the communication device operates in an FDD-LTE (Frequency Divisional Duplex-Long Term Evolution) mode.

9. The communication method of claim 1, wherein the reference signal is a cell-specific reference signal.

10. A communication device comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the communication device to transmit a first message to a terminal, the first message indicating that a first subframe is an MBSFN (Multicast Broadcast Single Frequency Network) subframe;

cause the communication device to transmit a reference signal to the terminal during a first time period of the first subframe; and

cause the communication device to receive a first data signal comprising first data from a base station during a second time period of the first subframe,

wherein the communication device transmits no reference signal to the terminal during the second time period.

11. The communication device of claim 10, wherein a length of the first time period corresponds to one or two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

12. The communication device of claim 10, wherein a length of the first time period corresponds to two OFDM symbols.

13. The communication device of claim 10, wherein a length of the first subframe corresponds to twelve (12) OFDM symbols.

14. The communication device of claim 10, wherein the second time period is a remainder of the first subframe subsequent to the first time period.

15. The communication device of claim 10, wherein the processor, when executing the program instructions, is further configured to cause the device to transmit a second signal comprising the first data to the terminal, and wherein the terminal is a Long Term Evolution (LTE) Release-8 terminal.

16. The communication device of claim 10, wherein the first subframe is a relay reception subframe.

17. The communication device of claim 10, wherein the communication device operates in an FDD-LTE (Frequency Divisional Duplex-Long Term Evolution) mode.

18. The communication device of claim 10, wherein the reference signal is a cell-specific reference signal.

19. A method of receiving data by a terminal, comprising:

receiving, by the terminal, data from a relay station;

receiving, by the terminal, a reference signal from the relay station during a first time period of a first subframe;

determining whether the first subframe is an MBSFN (Multicast Broadcast Single Frequency Network) subframe; and

disregarding remaining signals from the relay station during a second time period of the first subframe if it is determined that the first subframe is the MBSFN subframe,

wherein a first data signal comprising first data is transmitted from a base station to the relay station during the second time period of the first subframe, and the terminal receives no reference signal from the relay station during the second time period.

20. The method of claim 19, wherein a length of the first time period corresponds to one or two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

21. The method of claim 19, wherein a length of the first time period corresponds to two OFDM symbols.

22. The method of claim 19, wherein a length of the first subframe corresponds to twelve (12) OFDM symbols.

23. The method of claim 19, wherein the second time period is a remainder of the first subframe subsequent to the first time period.

24. The method of claim 19, wherein the terminal operates in an FDD-LTE (Frequency Divisional Duplex-Long Term Evolution) mode.

25. The method of claim 19, wherein the reference signal is a cell-specific reference signal.

26. A terminal, comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the terminal to receive data from a relay station;

cause the terminal to receive a reference signal from the relay station during a first time period of a first subframe;

determine whether the first subframe is an MBSFN (Multicast broadcast Single Frequency Network) subframe, and cause the terminal to disregard remaining signals from the relay station during a second time period of the first subframe if it is determined that the first subframe is the MBSFN subframe

wherein a first data signal comprising first data is transmitted from a base station to the relay station during the second time period of the first subframe, and

the terminal receives no reference signal from the relay station during the second time period.

27. The terminal of claim 26, wherein a length of the first time period corresponds to one or two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

28. The terminal of claim 26, wherein a length of the first time period corresponds to two OFDM symbols.

29. The terminal of claim 26, wherein a length of the first subframe corresponds to twelve (12) OFDM symbols.

30. The terminal of claim 26, wherein the second time period is a remainder of the first subframe subsequent to the first time period.

31. The terminal of claim 26, wherein the terminal operates in an FDD-LTE (Frequency Divisional Duplex-Long Term Evolution) mode.

32. The terminal of claim 26, wherein the reference signal is a cell-specific reference signal.

33. A communication apparatus for a terminal, comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the communication apparatus to receive data from a relay station;

cause the communication apparatus to receive a reference signal from the relay station during a first time period of a first subframe,

determine whether the first subframe is an MBSFN (Multicast broadcast Single Frequency Network) subframe; and

cause the communication apparatus to disregard remaining signals from the relay station during a second time period of the first subframe if it is determined that the first subframe is the MBSFN subframe,

wherein a first data signal comprising first data is transmitted from a base station to the relay station during the second time period of the first subframe, and the terminal receives no reference signal from the relay station during the second time period.

34. The apparatus of claim 33, wherein a length of the first time period corresponds to one or two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

35. The apparatus of claim 33, wherein a length of the first time period corresponds to two OFDM symbols.

36. The apparatus of claim 33, wherein a length of the first subframe corresponds to twelve (12) OFDM symbols.

37. The apparatus of claim 33, wherein the second time period is a remainder of the first subframe subsequent to the first time period.

38. The apparatus of claim 33, wherein the terminal operates in an FDD-LTE (Frequency Divisional Duplex-Long Term Evolution) mode.

39. The apparatus of claim 33, wherein the reference signal is a cell-specific reference signal.