DATA TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD

• US 20110188381A1
• Filed: 08/13/2008
• Published: 08/04/2011
• Est. Priority Date: 08/14/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Bong Hoe, Ahn, Joon Kui, Kim, Hak Seong
• Granted Patent: US 8,599,702 B2
• Time in Patent Office: Days
• US Class Current: 370/242
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/008 where the control data relates to payload of a different packet
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

A method of transmitting data in time division duplex (TDD) system is provided. The method includes configuring a radio frame, the radio frame comprising downlink subframes and an uplink subframe, wherein the downlink subframes are assigned for downlink transmission and the uplink subframe is assigned for uplink transmission, transmitting downlink data on the downlink subframes, and receiving in the uplink subframe acknowledgement (ACK)/negative-acknowledgement (NACK) signals corresponding to the downlink subframes, wherein at least one of the downlink subframes includes an indicator, the indicator indicating transmission of other downlink subframes than the at least one of the downlink suframes. A basic rule about allocation of uplink subframes and downlink subframes can be provided.

Claims

1. A method of transmitting data in time division duplex (TDD) system, the method comprising:

configuring a radio frame, the radio frame comprising downlink subframes and an uplink subframe, the downlink subframes being assigned for downlink transmission, the uplink subframe being assigned for uplink transmission;

transmitting downlink data on the downlink subframes; and

receiving in the uplink subframe acknowledgement (ACK)/negative-acknowledgement (NACK) signals corresponding to the downlink subframes, wherein at least one of the downlink subframes includes an indicator, the indicator indicating the rest of the downlink subframes.

2. The method of claim 1, wherein the number of the downlink subframes is determined depending on the number of the uplink subframe.

3. The method of claim 1, wherein the number of the downlink subframes is two, and the ACK/NACK signals are modulated in a binary phase shift keying (BPSK).

4. The method of claim 1, wherein the number of the downlink subframes is two, and the ACK/NACK signals are modulated in a quadrature phase shift keying (QPSK).

5. The method of claim 1, wherein the ACK/NACK signals are transmitted on an uplink control channel in the uplink subframe.

6. The method of claim 1, wherein the ACK/NACK signals are transmitted together with other uplink data on an uplink data channel in the uplink subframe.

7. The method of claim 1, wherein the number of the downlink subframes is determined depending on the number of the uplink subframe and the number of rank.

8. The method of claim 1, further comprising:

detecting an error on transmission of the downlink subframes by using the ACK/NACK signal and the radio of the downlink subframes from the uplink subframe.

9. A method of transmitting feedback information in time division duplex (TDD) system, the method comprising:

receiving downlink data on at least one downlink subframe; and

transmitting an ACK/NACK signal for the downlink data on an uplink subframe, wherein the at least one downlink subframe includes an indicator providing information on other downlink subframe.

10. The method of claim 9, wherein the indicator provides information on the other downlink subframe by indicating the number of the other downlink subframes.

11. The method of claim 9, wherein the indicator provides information on the other downlink subframe by indicating the presence or absence of the other downlink subframe.