METHOD AND APPARATUS FOR DEFINING TRANSCEIVING TIMING OF A PHYSICAL CHANNEL IN A TDD COMMUNICATION SYSTEM WHICH SUPPORTS CROSS-CARRIER SCHEDULING

• US 20120257554A1
• Filed: 12/22/2010
• Published: 10/11/2012
• Est. Priority Date: 12/24/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Young Bum, Cho, Joon Young, Han, Jin Kyu, Choi, Seung Hoon, Kim, Youn Sun, Ji, Hyoung Ju
• Granted Patent: US 9,007,964 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention relates to a method for defining, in a TDD wireless communication system in which broadband is configured by means of carrier aggregation, transceiving timing for a data channel and a control channel when cross-carrier scheduling is implemented.

Claims

1. A physical channel transmission/reception method of a base station in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a first transmission step of transmitting, when cross-carrier scheduling is determined, a downlink control channel on a first component carrier; and

a second transmission step of transmitting a downlink control channel on a second component carrier according to a transmission timing rule predetermined between the downlink control and data channels.

2. The physical channel transmission/reception method of claim 1, wherein the second transmission step characterized in that the downlink control channel and the downlink data channel are transmitted at a subframe configured as downlink subframe on both the first and second component carriers.

3. The physical channel transmission/reception method of claim 1, wherein the second transmission step characterized in that the downlink data channel is transmitted at a downlink subframe of the second component carrier which arrives first since the subframe carried downlink control channel on the first component carrier.

4. The physical channel transmission/reception method of claim 1, further comprising a step of receiving an uplink ACK/NACK signal transmitted by a terminal according to the TDD uplink-downlink configuration predetermined for the second component carrier.

5. The physical channel transmission/reception method of claim 1, further comprising a step of receiving an uplink retransmission ACK/NACK signal transmitted by a terminal at an uplink subframe of the second component carrier which arrives first after at least j subframes since the subframe carried the downlink data channel.

6. A physical channel transmission/reception method of a terminal in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a first reception step of receiving, when cross-carrier scheduling is determined, a downlink control channel on a first component carrier; and

a second reception step of receiving a downlink data channel scheduled by the downlink control channel on a second component carrier according to a transmission timing rule predetermined between downlink control channel and the downlink data channel.

7. The physical channel transmission/reception method of claim 6, wherein the second reception step is characterized in that the downlink control channel and the downlink data channel are received at a subframe configured as downlink subframe on both the first and second component carries.

8. The physical channel transmission/reception method of claim 6, wherein the second reception step is characterized in that the downlink data channel is received at the downlink subframe of the second component carrier which arrives first since the subframe carried the downlink control channel on the first component carrier.

9. The physical channel transmission/reception method of claim 6, further comprising transmitting an uplink retransmission ACK/NACK signal to a base station according to a TDD uplink-downlink configuration predetermined for the second component carrier.

10. The physical channel transmission/reception method of claim 6, further comprising transmitting an uplink retransmission ACK/NACK signal to a base station at an uplink subframe of the second component carrier which arrives first after at least j subframe since the subframe carried the downlink data channel.

11. A base station for transmitting/receiving physical channels in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls transmitting, when cross-carrier scheduling is determined, a downlink control channel on a first component carrier and transmitting a downlink control channel on a second component carrier according to a transmission timing rule predetermined between the downlink control and data channels.

12. The base station of claim 11, wherein the carrier aggregation and timing controller controls transmitting the downlink control channel and the downlink data channel at a subframe configured as downlink subframe on both the first and second component carriers.

13. The base station of claim 11, wherein the carrier aggregation and timing controller controls transmitting the downlink data channel a downlink subframe of the second component carrier which arrives first since the subframe carried downlink control channel on the first component carrier.

14. The base station of claim 11, wherein the carrier aggregation and timing controller controls receiving an uplink ACK/NACK signal transmitted by a terminal according to the TDD uplink-downlink configuration predetermined for the second component carrier.

15. The base station of claim 11, wherein the carrier aggregation and timing controller controls receiving an uplink retransmission ACK/NACK signal transmitted by a terminal at an uplink subframe of the second component carrier which arrives first after at least j subframes since the subframe carried the downlink data channel.

16. A terminal for transmitting/receiving physical channels terminal in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls receiving, when cross-carrier scheduling is determined, a downlink control channel on a first component carrier and receiving a downlink data channel scheduled by the downlink control channel on a second component carrier according to a transmission timing rule predetermined between downlink control channel and the downlink data channel.

17. The terminal of claim 16, wherein the carrier aggregation and timing controller controls receiving the downlink control channel and the downlink data channel at a subframe configured as downlink subframe on both the first and second component carries.

18. The terminal of claim 16, wherein the carrier aggregation and timing controller controls receiving the downlink data channel at the downlink subframe of the second component carrier which arrives first since the subframe carried the downlink control channel on the first component carrier.

19. The terminal of claim 16, wherein the carrier aggregation and timing controller controls transmitting an uplink retransmission ACK/NACK signal to a base station according to a TDD uplink-downlink configuration predetermined for the second component carrier.

20. The terminal of claim 16, wherein the carrier aggregation and timing controller controls transmitting an uplink retransmission ACK/NACK signal to a base station at an uplink subframe of the second component carrier which arrives first after at least j subframe since the subframe carried the downlink data channel.

21. A physical channel transmission/reception method of a base station in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a step of transmitting, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier; and

a step of receiving uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier which arrives first after at least j subframes since the subframe carried the downlink control channel.

22. The physical channel transmission/reception method of claim 21, further comprising a step of transmitting a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframe since the subframe carried the uplink data channel.

23. A physical channel transmission/reception method of a terminal in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a step of receiving, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier; and

a step of transmitting an uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier which arrives first after at least j subframes since the subframe carried the downlink control channel.

24. The physical channel transmission/reception method of claim 23, further comprising receiving a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.

25. A physical channel transmission/reception method of a base station in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising steps of:

transmitting, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier; and

receiving an uplink data channel scheduled by the downlink control channel at an uplink subframe of the second component carrier,

wherein the downlink control channel is transmitted at a subframe nearest to the subframe carrying the uplink data channel among the downlink subframes of the first component carrier before at least j subframes preceding the subframe of the second component carrier at which the downlink data channel is received.

26. The physical channel transmission/reception method of claim 25, further comprising a step of transmitting a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.

27. A physical channel transmission/reception method of a terminal in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising steps of:

receiving, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier; and

transmitting an uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier,

wherein the downlink control channel is received at a subframe nearest to the subframe carried the uplink data channel among the downlink subframes of the first component carrier before at least j subframe preceding the subframe of the second component carrier at which the uplink data channel is received.

28. The physical channel transmission/reception method of claim 27, further comprising a step of receiving a retransmission ACK/NACK signal at a subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.

29. A base station for transmitting/receiving physical channels in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls transmitting, when cross-carrier scheduling is determined, a downlink control channel on a first component carrier and receiving uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier which arrives first after at least j subframes since the subframe carried the downlink control channel.

30. The base station of claim 29, wherein the carrier aggregation and timing controller controls transmitting a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframe since the subframe carried the uplink data channel

31. A terminal for transmitting/receiving physical channels in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls receiving, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier and transmitting an uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier which arrives first after at least j subframes since the subframe carried the downlink control channel.

32. The terminal of claim 31, wherein the carrier aggregation and timing controller controls receiving a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.

33. A base station for transmitting/receiving physical channels in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls transmitting, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier and receiving an uplink data channel scheduled by the downlink control channel at an uplink subframe of the second component carrier,

wherein the downlink control channel is transmitted at a subframe nearest to the subframe carrying the uplink data channel among the downlink subframes of the first component carrier before at least j subframes preceding the subframe of the second component carrier at which the downlink data channel is received.

34. The base station of claim 33, wherein the carrier aggregation and timing controller controls of transmitting a retransmission ACK/NACK signal at a downlink subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.

35. A terminal for transmitting/receiving physical channels in a TDD radio communication system securing broad bandwidth through carrier aggregation when aggregated carriers are configured with different TDD uplink-downlink configurations, comprising:

a transceiver which transmits/receives at least one physical channel; and

a carrier aggregation and timing controller which controls receiving, when cross-carrier scheduling is determined, a downlink control channel at a certain subframe of a first component carrier and transmitting an uplink data channel scheduled by the downlink control channel at an uplink subframe of a second component carrier,

wherein the downlink control channel is received at a subframe nearest to the subframe carried the uplink data channel among the downlink subframes of the first component carrier before at least j subframe preceding the subframe of the second component carrier at which the uplink data channel is received.

36. The terminal of claim 35, wherein the carrier aggregation and timing controller controls receiving a retransmission ACK/NACK signal at a subframe of the first component carrier which arrives first after at least j subframes since the subframe carried the uplink data channel.