Method of Transmitting Scheduling Information In TDD System

• US 20100027446A1
• Filed: 04/10/2008
• Published: 02/04/2010
• Est. Priority Date: 04/11/2007
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Seung Deog, Kim, Ki Jun, Ahn, Joon Kui, Yoon, Suk Hyon, Lee, Dae Won
• Granted Patent: US 8,054,767 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• 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
• 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 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method of transmitting scheduling information in time-division-duplex(TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe.

Claims

1. A method of transmitting scheduling information in a time-division-duplex (TDD) mobile communication system, the method comprising:

configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe; and

transmitting scheduling information on a downlink control channel in a downlink subframe of the radio frame, the scheduling information comprising an uplink indicator and an uplink resource assignment, wherein the uplink indicator identifies at least one uplink subframe for which the uplink resource assignment is valid, and wherein the uplink resource assignment identifies a radio resource to be used for uplink data transmission in the at least one uplink subframe.

3. The method of claim 1, wherein the uplink indicator comprises one or more bits, and wherein the value of the one or more bits defines the position of the one or more uplink subframes in the radio frame, for which the uplink resource assignment is valid, relative to the position of another subframe.

4. The method of claim 1, wherein the the uplink indicator comprises a plurality of bits, and wherein the value of the uplink indicator bits defines the position of the plurality of uplink subframes in the radio frame, relative to the position of another subframe, that are contiguous with each other.

8. The method of claim 1, wherein the downlink control channel is a physical downlink control channel (PDCCH).

9. The method of claim 1, wherein the uplink resource assignment identifies at least one resource block (RB) reserved for uplink transmission.

16. The method of claim 1, wherein the radio resource is defined by a time and frequency over which the uplink data is transmitted.

17. The method of claim 1, wherein the number of downlink subframes is less than the number of uplink subframes.

18. The method of claim 1, wherein the radio frame comprises a plurality of uplink subframes, and wherein the uplink indicator identifies two consecutive uplink subframes for which the uplink resource assignment is valid.

19. The method of claim 3, wherein the another subframe is a self-subframe.

2. (canceled)

5-7. -7. (canceled)

10. A method of transmitting data in a time-division-duplex (TDD) mobile communication system, the method comprising:

receiving radio frame configuration information for a radio frame, the radio frame comprising uplink subframes and downlink subframes;

receiving scheduling information, including an uplink indicator and an uplink resource assignment, on a downlink control channel in a downlink subframe of the radio frame, wherein the uplink indicator identifies at least one uplink subframe for which the uplink resource assignment is valid and wherein the uplink resource assignment identifies a radio resource to be used for uplink data transmission in the at least one uplink subframe; and

transmitting mobile communication data in the at least one uplink subframe using the radio resource identified by the uplink resource assignment.

12. The method of claim 10, wherein the configuration information for the radio frame is received as a part of system information (SI).

13. The method of claim 10, wherein the uplink indicator comprises a plurality of bits, wherein the value of the uplink indicator bits defines the position of a plurality of contiguous uplink subframes in the radio frame relative to the position of another subframe.

20. The method of claim 10, wherein the uplink indicator comprises one or more bits, and wherein the value of the one or more bits defines the position of the one or more uplink subframes in the radio frame, for which the uplink resource assignment is valid, relative to the position of another subframe.

21. The method of claim 20, wherein the another subframe is a self-subframe.

22. The method of claim 10, wherein the radio resource is defined by a time and frequency over which the uplink data is transmitted.

23. The method of claim 10, wherein the number of downlink subframes is less than the number of uplink subframes.

24. The method of claim 10, wherein the uplink indicator identifies two consecutive uplink subframes the uplink resource assignment is valid.

11. (canceled)

14-15. -15. (canceled)