Method for transmitting and receiving control information of a mobile communication system

• US 9,839,026 B2
• Filed: 10/08/2016
• Issued: 12/05/2017
• Est. Priority Date: 06/07/2011
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Seo, Bang-Won, Ko, Young-Jo, Noh, Tae-Gyun, Ahn, Jae-Young
• Primary Examiner(s): Liu, Jung-Jen
• Application Number:
  US15/289,132
• Publication Number:
  US 20170026946A1
• Time in Patent Office: 423 Days
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The method for transmitting control information in a mobile communication system includes: determining a control channel resource for transmitting control information by means of the data channel region; and transmitting the control information using the determined control channel resource. A capacity for control information, which increases for multiple user multiple-input multiple-out (MIMOs) in a heterogeneous network environment, for heterogeneous network interference control using carrier aggregation, for frequent use of a multicast-broadcast single frequency network (MBSFN) subframe, and for a CoMP transmission control, may be satisfied. Further, an adaptive resource allocation based on a requested capacity for control information may be enabled, and the efficient utilization of resources may also be enabled.

Claims

1. A method of transmitting, by a base station, control information to a terminal in a subframe, the method comprising:

transmitting information about a first control channel, the first control channel being in a first region of the subframe; and

transmitting the control information through the first control channel,

wherein;

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

2. The method of claim 1, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

3. The method of claim 2, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is transmitted.

4. The method of claim 2, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

5. The method of claim 2, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

6. The method of claim 1, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).

7. A method of receiving, by a terminal, control information transmitted by a base station in a subframe, the method comprising:

receiving information about a first control channel, the first control channel being in a first region of the subframe; and

receiving the control information through the first control channel,

wherein;

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

8. The method of claim 7, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

9. The method of claim 8, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is received.

10. The method of claim 8, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

11. The method of claim 8, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

12. The method of claim 7, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).

13. A communication apparatus, comprising:

one or more antennas, a transceiver for performing wireless transmission and reception, a memory, and a processor operably coupled to the one or more antennas, the transceiver and the memory, to execute program instructions stored in the memory,

wherein the processor, when executing the program instructions;

causes the transceiver to transmit, to a terminal, information about a first control channel, the first control channel being in a first region of a subframe, and

causes the transceiver to transmit, to the terminal, control information through the first control channel,

wherein;

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

14. The communication apparatus of claim 13, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

15. The communication apparatus of claim 14, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is transmitted.

16. The communication apparatus of claim 14, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

17. The communication apparatus of claim 14, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

18. The communication apparatus of claim 13, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).

19. A terminal, comprising:

one or more antennas, a transceiver for performing wireless transmission and reception, a memory, and a processor operably coupled to the one or more antennas, the transceiver and the memory, to execute program instructions stored in the memory,

wherein the processor, when executing the program instructions;

causes the transceiver to receive information about a first control channel, the first control channel being in a first region of a subframe, and

causes the transceiver to receive control information through the first control channel,

wherein;

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

20. The communication apparatus of claim 19, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

21. The communication apparatus of claim 20, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is received.

22. The communication apparatus of claim 20, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

23. The communication apparatus of claim 20, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

24. The communication apparatus of claim 19, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).

25. An apparatus for a terminal, comprising:

a receiver;

a memory; and

a processor being operably coupled to the memory and the receiver,

wherein;

the processor is configured to cause the receiver to receive information about a first control channel, the first control channel being in a first region of a subframe, and

the processor is further configured to cause the receiver to receive control information through the first control channel,

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

26. The apparatus of claim 25, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

27. The apparatus of claim 26, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is received.

28. The apparatus of claim 26, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

29. The apparatus of claim 26, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

30. The apparatus of claim 25, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).

31. An apparatus for a transmitting station, the apparatus comprising:

a transmitter;

a memory; and

a processor being operably coupled to the memory and the receiver,

wherein;

the processor is configured to cause the transmitter to transmit, to a terminal, information about a first control channel, the first control channel being in a first region of a subframe, and

the processor is further configured to cause the transmitter to transmit, to the terminal, the control information through the first control channel,

the subframe comprises the first region and a second region, the first region comprising first resource elements and the second region comprising second resource elements;

one or more of the first resource elements are assigned to the first control channel and the other of the first resource elements are assigned to a data channel;

the second resource elements are assigned to a second control channel; and

the one or more of the first resource elements are determined at least based on an identifier of the terminal.

32. The apparatus of claim 31, wherein the first control channel is an Enhanced Physical Downlink Control Channel (EPDCCH), the second control channel is a Physical Downlink Control Channel (PDCCH), and the data channel is a Physical Downlink Shared Channel (PDSCH).

33. The apparatus of claim 32, wherein the subframe comprises two time slots, and the one or more of the first resource elements are determined based also on a slot number of a time slot through which the control information is transmitted.

34. The apparatus of claim 32, wherein the one or more of the first resource elements belongs to a terminal-specific search space for the terminal.

35. The apparatus of claim 32, wherein a same precoding as that applied to a demodulation reference signal (DM-RS) is applied to the first control channel.

36. The apparatus of claim 31, wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI).