WIRELESS COMMUNICATION SYSTEM, METHOD FOR TRANSMITTING INFORMATION OF USER EQUIPMENT, METHOD FOR RECEIVING INFORMATION OF BASE STATION, AND USER EQUIPMENT AND BASE STATION THEREOF

• US 20160365957A1
• Filed: 06/10/2016
• Published: 12/15/2016
• Est. Priority Date: 06/15/2015
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: LEE, Hyo Jin, KIM, Young Seok, Kwak, Do-Young
• Granted Patent: US 10,097,251 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0608 Antenna selection according to transmission parameters
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

The present disclosure provides a wireless communication system including a plurality of remote units, and a digital unit configured to connect one output port to at least one of i) one remote unit having a maximum antenna number of antennas among the plurality of remote units and ii) two or more remote units each having antennas smaller than the maximum antenna number among the plurality of remote units.

Claims

1. A wireless communication system comprising:

a plurality of remote units; and

a digital unit configured to connect an output port to at least one of i) one remote unit having a maximum antenna number of antennas among the plurality of remote units and ii) two or more remote units each having antennas fewer than the maximum antenna number among the plurality of remote units,

wherein the digital unit is configured to support a data service for a plurality of cell areas respectively formed by the plurality of remote units, and

wherein the digital unit receives, from a specific User Equipment (UE), information for identifying a cell area where the specific UE locates, among the plurality of cell areas.

2. The wireless communication system of claim 1, further comprising:

a signal distributor connected to the digital unit and at least one of the plurality of remote units and configured to distribute a signal transmitted from the digital unit to one of the connected remote units.

3. The wireless communication system of claim 1, wherein at least one of the plurality of remote units is configured to have at least two distributedly installed antennas, and

the digital unit is configured to support a data service for at least two cell areas respectively formed by the at least two distributedly installed antennas of the remote unit.

4. A method of transmitting information of a User Equipment (UE), the method comprising:

receiving a Channel Status Information Reference Signal (CSI-RS);

generating antenna port information which identifies an antenna port through the received CSI-RS; and

transmitting the antenna port information

5. The method of claim 4, wherein the antenna port information is transmitted by being included in at least one of channel state information and port information.

6. The method of claim 5, wherein the channel state information is a Precoding Matrix Index (PMI), and the port information is a port indicator.

7. The method of claim 4, wherein the generating comprises generating is (log₂N+1) bit of antenna port information for identifying all possible combinations of 1, 2, or N antenna ports when a number of the antenna ports is N.

8. The method of claim 4, wherein the generating comprises generating a specific bit of antenna port information for identifying some of all possible combinations of 1, 2, or N antenna ports when the number of the antenna ports is N.

9. The method of claim 5, wherein, when the antenna port information is included in the port information, the port information is transmitted at a timing that is equal to that of the channel state information or transmitted in a period corresponding to an integer times of a rank index which is one of the channel state information.

10. A method of receiving information of a base station, the method comprising:

transmitting a Channel Status Information Reference Signal (CSI-RS);

receiving, from a User Equipment (UE), antenna port information for identifying an antenna port; and

identifying an area where the UE locates through the antenna port information, separately scheduling the UE located in the identified area, and performing a data transmission.

11. The method of claim 10, wherein the antenna port information is received by being included in one of channel state information and port information.

12. The method of claim 11, wherein the channel state information is a Precoding Matrix Index (PMI), and the port information is a port indicator.

13. The method of claim 10, wherein the receiving comprises receiving (log₂N+1) bit of antenna port information for identifying all possible combinations of 1, 2 or N antenna ports when the number of the antenna ports is N.

14. The method of claim 10, wherein the receiving comprises receiving a specific bit of antenna port information for identifying some of all possible combinations of 1, 2, or N antenna ports when the number of the antenna ports is N.

15. The method of claim 11, wherein, when the antenna port information is included in the port information, the port information is received at a timing that is equal to that of the channel state information, or received in a period corresponding to an integer times of a rank index, which is one of the channel state information.