Method and apparatus for configuring control channel resources in communication system

• US 9,949,247 B2
• Filed: 09/16/2013
• Issued: 04/17/2018
• Est. Priority Date: 09/18/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ji, Hyoung Ju, Kim, Youn Sun, Cho, Joon Young
• Primary Examiner(s): VU, HOANG-CHUONG Q
• Application Number:
  US14/429,328
• Publication Number:
  US 20150237605A1
• Time in Patent Office: 1,674 Days
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04B 7/2665 Arrangements for Wireless Frequency Division Multiple Access [FDMA] System Synchronisation
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• 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

Abstract

A method and an apparatus for configuring a control channel in a communication system, according to the present invention, allocate resources of different sizes according to a distributed transmission mode and a localized transmission mode and apply different antenna transmission techniques, to a control channel on the basis of frequency division. In addition, the present invention relates to a method by which a terminal estimates a channel irrespective of the transmission mode. According to the present invention, a control channel transmitted to different terminals from a base station can be efficiently multiplexed and the control channel be received faster by reducing the complexity of the terminal.

Claims

1. A method implemented using a base station to transmit control information in a wireless communication system, the method comprising:

configuring a physical resource block (PRB) with one or more distributed enhanced resource element groups (DeREGs), wherein each of DeREGs comprises a same number of resource elements that are mapped to at least two demodulated reference signal (DMRS) ports in a distributed transmission mode;

configuring the PRB with one or more localized enhanced control channel elements (LeCCEs) comprising resource elements using a same DMRS port among the at least two DMRS ports mapped to the resource elements of each of the DeREGs in a localized transmission mode; and

transmitting the control information using the PRB to a terminal.

2. The method of claim 1, further comprising transmitting PRB configuration information to transmit the control information to the terminal, wherein the PRB configuration information includes at least one of a transmission mode and a PRB index.

3. The method of claim 2, wherein configuring the PRB with the DeREGs comprises configuring, when four DMRS ports are available and up to four DeREGs are configurable in the PRB, the PRB by mapping a first DeREG set to DMRS ports 7 and 8 and a second DeREG set to DMRS ports 9 and 10.

4. The method of claim 3, wherein configuring the PRB with the one or more LeCCEs comprises:

configuring a first LeCCE by aggregating resources using the DMRS port 7 in the first DeREG set, a second LeCCE by aggregating resources using the DMRS port 8 in the first DeREG set, a third LeCCE by aggregating resources using the DMRS port 9 in the second DeREG set, and a fourth LeCCE by aggregating resources using the DMRS port 10 in the second DeREG set; and

configuring the PRB by arranging the first, second, third, and fourth LeCCEs.

5. The method of claim 3, wherein configuring the PRB with the one or more LeCCEs comprises:

configuring a first LeCCE by aggregating resources using the DMRS port 7 or 9 in first and second DeREG sets and configuring a second LeCCE by aggregating resources using the DMRS port 8 or 10 in the first and second DeREG sets; and

configuring the PRB by arranging the first and second LeCCEs.

6. The method of claim 3, wherein configuring the PRB with the one or more LeCCEs comprises:

configuring a first LeCCE by aggregating resources using the DMRS port 7 in first and second DeREG sets and configuring a second LeCCE by aggregating resources using the DMRS port 8 in the first and second DeREG sets; and

configuring the PRB by arranging the first and second LeCCEs.

7. The method of claim 2, wherein configuring the PRB with the DeREGs comprises configuring, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, the PRB by mapping a first DeREG set and a second DeREG set to DMRS ports 7 and 8 or mapping the first DeREG set and the second DeREG set to DMRS ports 9 and 10.

8. The method of claim 2, wherein configuring the PRB with the DeREGs comprises configuring, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, the PRB by mapping all DeREG sets to DMRS ports 7 and 8.

9. A method implemented using a terminal to receiving a control information in a wireless communication system, the method comprising:

estimating a channel per demodulated reference signal (DMRS) port of the terminal;

receiving a physical resource block (PRB) configured with one or more distributed enhanced resource element groups (DeREGs), wherein each of DeREGs comprises a same number of resource elements that are mapped to at least two DMRS-ports in a distributed transmission mode; and

receiving, in a localized transmission mode, the PRB comprising one or more localized control channel elements (LeCCEs) comprising resource elements using a same DMRS port among the at least two DMRS ports mapped to the resource elements of each of the DeREGs.

10. The method of claim 9, further comprising receiving PRB configuration information to transmit the control information from a base station, wherein the PRB configuration information comprises at least one of a transmission mode and a PRB index.

11. The method of claim 10, wherein receiving the PRB comprises receiving, when four DMRS ports are available and up to four DeREGs are configurable in the PRB, a first DeREG set through DMRS ports 7 and 8 and a second DeREG set through DMRS ports 9 and 10.

12. The method of claim 10, wherein receiving the PRB comprises receiving, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, a first DeREG set and a second DeREG set through DMRS ports 7 and 8 or DMRS ports 9 and 10.

13. The method of claim 10, wherein receiving the PRB comprises receiving, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, all DeREG sets through DMRS ports 7 and 8.

14. A base station to transmit control information channel in a wireless communication system, wherein the base station comprises a controller configured to:

control a transceiver to transmit and receive signals to and from a terminal;

configure a physical resource block (PRB) with one or more distributed enhanced resource element groups (DeREGs), wherein each of DeREGs comprises a same number of resource elements that are mapped to at least two demodulated reference signal (DMRS) ports in a distributed transmission mode;

configure the PRB with one or more localized enhanced control channel elements (LeCCEs) comprising resource elements using a same DMRS port among the at least two DMRS ports mapped to the resource elements of each of the DeREGs in a localized transmission mode; and

transmit the control information to a terminal using the PRB.

15. The base station of claim 14, wherein the controller is configured to control a transmission of PRB configuration information to transmit the control information to the terminal, and wherein the PRB configuration information comprises at least one of a transmission mode and a PRB index.

16. The base station of claim 15, wherein the controller is configured to control a configuration of, when four DMRS ports are available and up to four DeREGs are configurable in the PRB, the PRB by mapping a first DeREG set to DMRS ports 7 and 8 and a second DeREG set to DMRS ports 9 and 10.

17. The base station of claim 15, wherein the controller is configured to control a configuration of, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, the PRB by mapping a first DeREG set and a second DeREG set to DMRS ports 7 and 8 or mapping the first DeREG set and the second DeREG set to DMRS ports 9 and 10.

18. The base station of claim 15, wherein the controller is configured to control a configuration of, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, the PRB by mapping all DeREG sets to DMRS ports 7 and 8.

19. A terminal to receive control information in a wireless communication system, the terminal comprising:

a channel estimator configured to estimate a channel per demodulated reference signal (DMRS) port;

a transceiver; and

a controller configured to;

control the transceiver to receive a physical resource block (PRB) configured with one or more distributed enhanced resource element groups (DeREGs), wherein each of DeREGs comprises a same number of resource elements that are mapped to at least two demodulated reference signal (DMRS) ports in a distributed transmission mode;

control the transceiver to receive, in a localized transmission mode, the PRB comprising one or more localized enhanced control channel elements (LeCCEs) comprising resource elements using a same DMRS port among the at least two DMRS ports mapped to the resource elements of each of the DeREGs; and

control the transceiver to transmit and receive signals to and from a base station.

20. The terminal of claim 19, wherein the controller is configured to control a reception of PRB configuration information to transmit the control information from the base station, wherein the PRB configuration information comprises at least one of a transmission mode and a PRB index.

21. The terminal of claim 20, wherein the controller is configured to control a reception of, when four DMRS ports are available and up to four DeREGs are configurable in the PRB, a first DeREG set through DMRS ports 7 and 8 and a second DeREG set through DMRS ports 9 and 10.

22. The terminal of claim 20, wherein the controller is configured to control a reception of, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, a first DeREG set and a second DeREG set through DMRS ports 7 and 8 or DMRS ports 9 and 10.

23. The terminal of claim 20, wherein the controller is configured to control a reception of, when four DMRS ports are available and up to 8 DeREGs are configurable in the PRB, all DeREG sets through DMRS ports 7 and 8.