APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL IN DISTRIBUTED ANTENNA SYSTEM

• US 20120322477A1
• Filed: 03/04/2011
• Published: 12/20/2012
• Est. Priority Date: 03/04/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ihm, Bin Chul, Kang, Ji Won, Chun, Jin Young
• Granted Patent: US 9,094,060 B2
• Time in Patent Office: Days
• US Class Current: 455/501
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04B 7/0834 based on external parameters, e.g. subscriber speed or location

Abstract

The present invention relates to a method for receiving a signal through a terminal in a distributed antenna system (DAS) comprising the steps of: receiving composition information of a local midamble corresponding to a terminal or a terminal group including the terminal from a base station which belongs to the DAS; and receiving the local midamble from the base station, and the local midamble can be a midamble corresponding to one or more effective transmission antennas associated with the terminal or the terminal group of a plurality of antennas of the base station.

Claims

1. A method for receiving, by a user equipment, a signal in a distributed antenna system (DAS), the method comprising:

receiving configuration information of a local midamble corresponding to a user equipment or a user equipment group including the user equipment from a base station which belongs to the DAS; and

receiving the local midamble from the base station,

wherein the local midamble corresponds to one or more effective transmitting antennas associated with the user equipment or the user equipment group, from among a plurality of antennas of the base station.

2. The method according to claim 1, further comprising:

performing channel estimation by differentiating the local midamble corresponding to the one or more effective transmitting antennas on the basis of the configuration information of the local midamble.

3. The method according to claim 2, further comprising:

transmitting feedback information based on the channel estimation for the one or more effective transmitting antennas to the base station.

4. The method according to claim 1, further comprising:

receiving configuration information of a global midamble corresponding to each of the plurality of antennas included in the base station from the base station; and

receiving the global midamble from the base station.

5. The method according to claim 4, further comprising:

performing channel estimation for each of the plurality of antennas of the base station by using the global midamble.

6. The method according to claim 5, further comprising:

generating information on one or more effective transmitting antennas associated with the user equipment or the user equipment group on the basis of the result of the channel estimation; and

transmitting the information on the one or more effective transmitting antennas to the base station.

7. A method for receiving, by a user equipment, a signal in a distributed antenna system (DAS), the method comprising:

receiving group mapping information for mapping a plurality of antennas of a base station, which belongs to the DAS, into one or more local antenna groups of the base station from the base station; and

receiving a midamble corresponding to each of the antennas included in the local antenna group.

8. The method according to claim 7, wherein the respective local antenna groups have the same global midamble for antennas (n-th antennas) having the same index.

9. A method for transmitting, by a base station, a signal in a distributed antenna system (DAS), the method comprising:

configuring a local midamble corresponding to one or more effective transmitting antennas associated per user equipment or per user equipment group; and

transmitting the local midamble corresponding to each user equipment or each user equipment group.

10. The method according to claim 9, further comprising:

configuring and broadcasting a global midamble corresponding to each of a plurality of antennas of the base station.

11. The method according to claim 10, further comprising:

receiving feedback information including information on the one or more effective transmitting antennas generated by result of channel estimation performed on the basis of the global midamble from the user equipment or the user equipment group.

12. The method according to claim 11, further comprising:

selecting the one or more effective transmitting antennas associated with the user equipment or the user equipment group based on the feedback information.

13. The method according to claim 9, further comprising:

transmitting configuration information on the local midamble corresponding to each user equipment or each user equipment group.

14. The method according to claim 9, further comprising:

receiving feedback information based on result of channel estimation performed for each of the effective transmitting antennas on the basis of the local midamble from the user equipment or the user equipment group.

15. A method for transmitting, by a base station, a signal in a distributed antenna system (DAS), the method comprising:

allocating a plurality of antennas to one or more local antenna groups; and

broadcasting a global midamble corresponding to each of the antennas included in the local antenna groups,

wherein global midambles for antennas (n-th antennas) having the same index on the basis of each of the local antenna groups are the same as one another.

16. The method according to claim 15, further comprising:

transmitting group mapping information related to mapping of the plurality of antennas into the one or more local antenna groups.

17. A user equipment in a distributed antenna system (DAS), the user equipment comprising:

a reception module for receiving a signal; and

a processor for performing channel estimation on the basis of a local midamble corresponding to the user equipment or user equipment group including the user equipment, which is received from a base station belonging to the DAS through the reception module, wherein the local midamble corresponds to one or more effective transmitting antennas associated per user equipment or per user equipment group, from among a plurality of antennas of the base station.

18. A base station in a distributed antenna system (DAS), the base station comprising:

a transmission module for transmitting a signal; and

a processor for configuring a local midamble corresponding to one or more effective transmitting antennas associated per user equipment or per user equipment group, which belongs to the DAS,

wherein the global midamble is broadcasted in a service support region of the base station through the transmission module and the local midamble is transmitted to the user equipment or the user equipment group, which belongs to the DAS.