Method and apparatus for transmitting and receiving control channels by restricting a set of the control channels in a wireless communication system

• US 10,091,780 B2
• Filed: 06/05/2017
• Issued: 10/02/2018
• Est. Priority Date: 05/02/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwak, Yong-Jun, Kwon, Hwan-Joon, Cho, Joon-Young, Lee, Ju-Ho, Han, Jin-Kyu, Heo, Youn-Hyoung, Wang, Ping
• Primary Examiner(s): Elpenord, Candal
• Application Number:
  US15/614,174
• Publication Number:
  US 20170273060A1
• Time in Patent Office: 484 Days
• Field of Search: None
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus are provided for transmitting and receiving control information in a wireless communication system. A method in a base station includes transmitting, to a terminal, information associated with a number of orthogonal frequency division multiplexing (OFDM) symbols carrying a control channel; determining a set of control channel candidates based on an identifier (ID) of the terminal and transmission time information, wherein each control channel candidate included in the set of control channel candidates consists of one of one, two, four, or eight control channel elements (CCEs); selecting at least one control channel candidate from among the set of control channel candidates; and transmitting the control information to the terminal through the selected at least one control channel candidate.

Claims

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

transmitting, to a terminal, information associated with a resource region carrying a control channel;

transmitting, to the terminal, a number of control channel candidates corresponding to a number of control channel element(s) (CCEs) constituting one control channel candidate;

determining a set of control channel candidates based on an identifier (ID) of the terminal and the transmitted number of control channel candidates;

selecting at least one control channel candidate from among the set of control channel candidates; and

transmitting the control information to the terminal through the selected at least one control channel candidate.

2. The method of claim 1, wherein the set of control channel candidates is determined further based on a total number of CCEs in the control channel.

3. The method of claim 1, wherein the set of control channel candidates is determined further based on the number of CCEs constituting one control channel candidate.

4. The method of claim 1, wherein numbers of control channel candidates corresponds to numbers of CCEs constituting one control channel candidate, respectively.

5. The method of claim 1, wherein the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate is transmitted through an upper layer signaling.

6. The method of claim 1, wherein the set of control channel candidates is determined further based on transmission time information.

7. A method for receiving control information in a terminal of a wireless communication system, the method comprising:

receiving, from a base station, information associated with a resource region carrying a control channel;

receiving, from the base station, a number of control channel candidates corresponding to a number of control channel element(s) (CCEs) constituting one control channel candidate;

determining a set of control channel candidates based on an identifier (ID) of the terminal and the received number of control channel candidates; and

monitoring at least one control channel candidate belonging to the set of control channel candidates to receive the control information.

8. The method of claim 7, wherein the set of control channel candidates is determined further based on a total number of CCEs in the control channel.

9. The method of claim 7, wherein the set of control channel candidates is determined further based on the number of CCEs constituting one control channel candidate.

10. The method of claim 7, wherein numbers of control channel candidates corresponds to numbers of CCEs constituting one control channel candidate, respectively.

11. The method of claim 7, wherein the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate is received through an upper layer signaling.

12. The method of claim 7, wherein the set of control channel candidates is determined further based on transmission time information.

13. An apparatus for transmitting control information in a base station of a wireless communication system, the apparatus comprising:

a processor configured to;

determine information associated with a resource region carrying a control channel,

determine a number of control channel candidates corresponding to a number of control channel element(s) (CCEs) constituting one control channel candidate,

determine a set of control channel candidates based on an identifier (ID) of the terminal and the determined number of control channel candidates, and

select at least one control channel candidate from among the set of control channel candidates; and

a transmission unit configured to;

transmit, to the terminal, the information associated with the resource region carrying the control channel,

transmit, to the terminal, the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate, and

transmit the control information to the terminal through the selected at least one control channel candidate.

14. The apparatus of claim 13, wherein the set of control channel candidates is determined further based on a total number of CCEs in the control channel.

15. The apparatus of claim 13, wherein the set of control channel candidates is determined further based on the number of CCEs constituting one control channel candidate.

16. The apparatus of claim 13, wherein numbers of control channel candidates corresponds to numbers of CCEs constituting one control channel candidate, respectively.

17. The apparatus of claim 13, wherein the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate is transmitted through an upper layer signaling.

18. The apparatus of claim 13, wherein the set of control channel candidates is determined further based on transmission time information.

19. An apparatus for receiving control information in a terminal of a wireless communication system, the apparatus comprising:

a processor configured to determine a set of control channel candidates based on an identifier (ID) of the terminal and a number of control channel candidates corresponding to a number of control channel element(s) (CCEs) constituting one control channel candidate; and

a reception unit configured to;

receive information associated with a resource region carrying a control channel,

receive the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate, and

receive the control information included in the resource region by decoding at least one control channel candidate included in the set of control channel candidates.

20. The apparatus of claim 19, wherein the set of control channel candidates is determined further based on a total number of CCEs in the control channel.

21. The apparatus of claim 19, wherein the set of control channel candidates is determined further based on the number of CCEs constituting one control channel candidate.

22. The apparatus of claim 19, wherein numbers of control channel candidates corresponds to numbers of CCEs constituting one control channel candidate, respectively.

23. The apparatus of claim 19, wherein the number of control channel candidates corresponding to the number of CCEs constituting one control channel candidate is received through an upper layer signaling.

24. The apparatus of claim 19, wherein the set of control channel candidates is determined further based on transmission time information.