METHOD AND APPARATUS FOR SENDING AND RECEIVING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM

• US 20190097778A1
• Filed: 11/23/2018
• Published: 03/28/2019
• Est. Priority Date: 02/02/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, In Ho, HAN, Jin Kyu, LEE, Ju Ho, YU, Jae Chon
• Granted Patent: US 10,715,294 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/52 based on load

Abstract

In a wireless communication system, a control channel is required in order to use limited resources effectively. However, the control channel resource is part of the system overhead, and thus reduces the data channel resource used for data transmission. In the long term evolution (LTE) system based on OFDM, one sub frame the consists of fourteen OFDM symbols wherein a maximum of three OFDM symbols are used for the control channel resource and remaining eleven OFDM symbols are used for the data channel resource. Therefore, the quantity of energy that can be transmitted for the control channel resource is extremely limited compared to the data channel resource. For this reason, the coverage of the control channel becomes less than that of the data channel, and even if a user can successfully receive the data channel, reception failure of a control channel sometimes results in failure of data recovery. In the present invention, in order to expand the coverage of the control channel to at least the coverage of the data channel, the time resource of the transmission resource wherein the control channel is transmitted is expanded and allocated for sending and receiving the control channel. By way of methods for extending the time resource are provided a method wherein a plurality of sub frames are used to transmit one control channel, and a method wherein a part of a data channel is used for the control channel.

Claims

1. A method for transmitting downlink control information by a base station in a communication system, the method comprising:

transmitting, to a terminal, configuration information on control resources using a higher layer signaling, the information including a number of symbols of the control resources;

generating the downlink control information including information on resource assignment to be used for data transmission or data reception of the terminal; and

transmitting, to the terminal, the downlink control information on the control resources based on the configuration information.

2. The method of claim 1, wherein the control resources include at least one control channel element (CCE).

3. The method of claim 2, wherein each of the at least one CCE includes resource element groups (REGs).

4. The method of claim 1, wherein the number of symbol of the control resources includes 1, 2, or 3.

5. A method for receiving downlink control information by a terminal in a communication system, the method comprising:

receiving, from a base station, configuration information on control resources using a higher layer signaling, the information including a number of symbols of the control resources; and

receiving, from the base station, the downlink control information on the control resources based on the configuration information,

wherein the downlink control information includes information on resource assignment to be used for data transmission or data reception of the terminal.

6. The method of claim 5, wherein the control resources include at least one control channel element (CCE).

7. The method of claim 6, wherein each of the at least one CCE includes resource element groups (REGs).

8. The method of claim 5, wherein a number of symbol of the control resources includes 1, 2, or 3.

9. A base station for transmitting downlink control information in a communication system, the base station comprising:

a transceiver; and

a controller couple with the transceiver and configured to control to;

transmit, to a terminal, configuration information on control resources using a higher layer signaling, the information including a number of symbols of the control resources,

generate the downlink control information including information on resource assignment to be used for data transmission or data reception of the terminal, and

transmit, to the terminal, the downlink control information on the control resources based on the configuration information.

10. The base station of claim 9, wherein the control resources include at least one control channel element (CCE).

11. The base station of claim 10, wherein each of the at least one CCE includes resource element groups (REGs).

12. The base station of claim 9, wherein the number of symbol of the control resources includes 1, 2, or 3.

13. A terminal for receiving downlink control information in a communication system, the terminal comprising:

a transceiver; and

a controller couple with the transceiver and configured to control to;

receive, from a base station, configuration information on control resources using a higher layer signaling, the information including a number of symbols of the control resources; and

receive, from the base station, the downlink control information on the control resources based on the configuration information,

wherein the downlink control information includes information on resource assignment to be used for data transmission or data reception of the terminal.

14. The terminal of claim 13, wherein the control resources include at least one control channel element (CCE).

15. The terminal of claim 14, wherein each of the at least one CCE includes resource element groups (REGs).

16. The terminal of claim 13, wherein a number of symbol of the control resources includes 1, 2, or 3.