Dynamic TDD data channel transmission method and apparatus for wireless communication system

• US 9,185,668 B2
• Filed: 05/23/2012
• Issued: 11/10/2015
• Est. Priority Date: 05/23/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ji, Hyoungju, Cho, Joonyoung, Choi, Seunghoon, Kim, Youngbum
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): LOO, JUVENA W
• Application Number:
  US13/478,804
• Publication Number:
  US 20120300681A1
• Time in Patent Office: 1,266 Days
• Field of Search: 370276-296, 370310-349, 370431-468
• US Class Current: 1/1
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A data channel transmission method and apparatus is provided for the wireless communication system operating in a dynamic Time Division Duplex (TDD) mode. The dynamic TDD data channel transmission method and apparatus herein optimizes system performance in adaptation to the variation of the uplink and downlink traffic, and configures the radio frame such that all of the subframes have a static region, thereby operating along with other terminals without compromising channel estimation performance.

Claims

1. A data transmission/reception method of a base station, comprising:

transmitting configuration information of a plurality of subframes divided at a time axis in a radio frame;

dividing each of downlink subframes among the plurality of subframes into a semi-static region and a dynamic region;

transmitting a control signal in the semi-static region;

transmitting downlink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for downlink data transmission and

receiving uplink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for uplink data transmission.

2. The data transmission/reception method of claim 1, wherein transmitting the control signal in the semi-static region and receiving uplink data in the dynamic region comprises:

configuring each of the divided downlink subframes as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe; and

transmitting the configuration information.

3. The data transmission/reception method of claim 1, wherein transmitting the control signal in the semi-static region and receiving uplink data in the dynamic region comprises receiving the uplink data by referencing an uplink reference signal at 5^th and 11^th symbols in the dynamic region.

4. The data transmission/reception method of claim 1, wherein the control signal comprises channel allocation information for uplink or downlink data in the dynamic region or channel allocation information for uplink data in an uplink subframe linked to the downlink subframe among the plurality of subframes.

5. A data transmission/reception method of a terminal, comprising:

receiving configuration information of a plurality of subframes divided at time axis in a radio frame;

discriminating between a semi-static region and a dynamic region of each of downlink subframes among the plurality of subframes;

receiving a control signal in the semi-static region;

transmitting uplink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for uplink data transmission; and

receiving downlink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for downlink data transmission.

6. The data transmission/reception method of claim 5, wherein receiving the control signal in the semi-static region and transmitting uplink data in the dynamic region comprises transmitting the uplink data by referencing an uplink reference signal at 5^th and 11^th symbols in the dynamic region.

7. The data transmission/reception method of claim 5, wherein receiving the control signal in the semi-static region and transmitting uplink data in the dynamic region comprises receiving information on the downlink subframe configured as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe.

8. The data transmission/reception method of claim 5, wherein the control signal comprises channel allocation information for uplink or downlink data in the dynamic region or channel allocation information for uplink data in an uplink subframe linked to the downlink subframe among the plurality of subframes.

9. A data transmission/reception apparatus of a base station, comprising:

a communication unit for receiving and transmitting a signal; and

a controller configured to transmit configuration information of a plurality of subframes divided at a time axis in a radio frame, to divide each of downlink subframes among the plurality of subframes into a semi-static region and a dynamic region, transmit a control signal in the semi-static region, transmit downlink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for downlink data transmission, and receive uplink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for uplink data transmission.

10. The data transmission/reception apparatus of claim 9, wherein the controller controls configuring each of the downlink subframe as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe and transmitting configuration information.

11. The data transmission/reception apparatus of claim 9, wherein the control signal comprises channel allocation information for uplink or downlink data in the dynamic region or channel allocation information for uplink data in an uplink subframe linked to the downlink subframe among the plurality of subframes.

12. A data transmission/reception apparatus of a terminal, comprising:

a communication unit for receiving and transmitting a signal; and

a controller configured to receive configuration information of a plurality of subframes divided at a time axis in a radio frame, discriminate between a semi-static region and a dynamic region of each of downlink subframes among the subframes, receive a control signal in the semi-static region, and transmit uplink data in the dynamic region if the control signal comprises information indicating the dynamic region is for uplink data transmission, and receive downlink data in the dynamic region, if the control signal comprises information indicating the dynamic region is for downlink data transmission.

13. The data transmission/reception apparatus of claim 12, wherein the controller controls transmitting the uplink data by referencing an uplink reference signal at 5^th and 11^th symbols in the dynamic region.

14. The data transmission/reception apparatus of claim 12, wherein the controller controls receiving information on the downlink subframe configured as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe.

15. The data transmission/reception apparatus of claim 12, wherein the control signal comprises channel allocation information for uplink or downlink data in the dynamic region or channel allocation information for uplink data in an uplink subframe linked to the downlink subframe among the plurality of subframes.