METHOD AND APPARATUS FOR CONFIGURING CONTROL CHANNEL RESOURCES IN COMMUNICATION SYSTEM

• US 20150237605A1
• Filed: 09/16/2013
• Published: 08/20/2015
• Est. Priority Date: 09/18/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Youn Sun, Ji, Hyoung Ju, Cho, Joon Young
• Granted Patent: US 9,949,247 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 a control channel in a wireless communication system, the method comprising:

configuring a Physical Resource Block (PRB) with one or more Distributed enhanced Resource Element Groups (DeREGs) comprising a same size as two mapped Demodulated Reference Signal (DMRS) ports in a distributed transmission mode;

configuring the PRB with one or more Localized enhanced Control Channel Elements (LeCCEs) arranged by collecting resources using the same DMRS ports in the localized transmission mode; and

transmitting the control channel to a terminal through the PRB.

2. The method of claim 1, further comprising transmitting PRB configuration information to transmit the control channel 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 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 sets to DMRS ports 9 and 10.

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 or 9 in the 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.

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 all DeREG sets to DMRS ports 7 and 8.

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

configuring the PRB by arranging the first and second LeCCEs.

9. A method implemented using a terminal to receiving a control channel 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) comprising a same size through two DMRS ports in a distributed transmission mode; and

receiving, in a localized transmission mode, resources comprising arranged one or more Localized enhanced Control Channel Elements (LeCCEs) through DMRS ports as the distributed transmission mode.

10. The method of claim 9, further comprising receiving PRB configuration information to transmit the control channel 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 a control 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) comprising a same size as two mapped Demodulated Reference Signal (DMRS) ports in a distributed transmission mode,

configure the PRB with one or more Localized enhanced Control Channel Elements (LeCCEs) arranged by collecting resources using the same DMRS ports in the localized transmission mode, and

transmit the control channel to the terminal through 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 channel to the terminal, and wherein the 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 the 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 the 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 sets to the DMRS ports 9 and 10.

18. The base station of claim 15, wherein the controller is configured to control the 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 a control channel in a wireless communication system, the terminal comprising:

a channel estimator configured to estimate a channel per Demodulated Reference Signal (DMRS) port; and

a controller configured to;

control a reception of a Physical Resource Block (PRB) configured with one or more Distributed enhanced Resource Element Groups (DeREGs) comprising a same size through two DMRS ports in a distributed transmission mode,

control a reception of, in a localized transmission mode, resources comprising arranged one or more Localized enhanced Control Channel Elements (LeCCEs) through DMRS ports as the distributed transmission mode, and

control a 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 channel 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.