Method of transmitting scheduling information in TDD system

• US 9,071,400 B2
• Filed: 06/28/2012
• Issued: 06/30/2015
• 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, Yoon, Suk Hyon, Lee, Dae Won, Ahn, Joon Kui
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): Wei, Siren
• Application Number:
  US13/536,772
• Publication Number:
  US 20120314627A1
• Time in Patent Office: 1,097 Days
• Field of Search: 370/280, 370/278, 370/282, 370/277
• 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 5/0091 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, by a base station, scheduling information in a time-division-duplex (TDD) mobile communication system using a plurality of radio frames, each including downlink subframes reserved for downlink and uplink subframes reserved for uplink, the method comprising:

transmitting, to a user equipment, scheduling information on a downlink control channel within a downlink subframe in a radio frame, the scheduling information comprising an uplink indicator and an uplink resource assignment,

wherein the uplink indicator identifies a position of at least one uplink subframe for which an uplink resource is assigned from a position of the downlink subframe,

wherein the uplink resource assignment identifies a radio resource to be used for uplink data transmission in the at least one uplink subframe, and

wherein a number of downlink subframes in the radio frame is less than a number of uplink subframes in the radio frame.

2. The method of claim 1, further comprising transmitting configuration information for the radio frame, the configuration information indicating for each subframe in the radio frame whether it is reserved for uplink or downlink.

3. The method of claim 2, wherein the configuration information indicates configuration 0 of the table below:

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

5. The method of claim 1, wherein a total bit number of the uplink indicator is 2.

6. The method of claim 1, wherein the at least one uplink subframe is two consecutive uplink subframes.

7. The method of claim 1, further comprising receiving, from the user equipment, mobile communication data in the at least one uplink subframe.

8. A method of transmitting, by a user equipment, data in a time-division-duplex (TDD) mobile communication system using a plurality of radio frames, each including downlink subframes reserved for downlink and uplink subframes reserved for uplink, the method comprising:

receiving, from a base station, scheduling information, including an uplink indicator and an uplink resource assignment, on a downlink control channel within a downlink subframe in a radio frame, wherein the uplink indicator identifies a position of at least one uplink subframe for which an uplink resource is assigned from a position of the downlink subframe; and

transmitting mobile communication data to the base station in the at least one uplink subframe,

wherein the uplink resource assignment identifies a radio resource to be used for uplink data transmission in the at least one uplink subframe, and

wherein a number of downlink subframes in the radio frame is less than a number of uplink subframes in the radio frame.

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

10. The method of claim 8 further comprising receiving configuration information for the radio frame, the configuration information indicating for each subframe in the radio frame whether it is reserved for uplink or downlink.

11. The method of claim 10, wherein the configuration information indicates configuration 0 of the table below:

12. The method of claim 8, wherein a total bit number of the uplink indicator is 2.

13. The method of claim 8, wherein the at least one uplink subframe is two consecutive uplink subframes.