Method for indicating a DM-RS antenna port in a wireless communication system

Patent metadata

Field	Value
Publication number	US-9130719-B2
Application number	US-201113025748-A
Country	US
Kind code	B2
Filing date	Feb 11, 2011
Priority date	Feb 11, 2010
Publication date	Sep 8, 2015
Grant date	Sep 8, 2015

Abstract

A control information interpretation method for use in a mobile communication system including a terminal and a base station, wherein the terminal receives, from the base station, control information including transport block information and DeModulation Reference Signal (DM-RS) antenna port allocation indication information, checks a number of the transport blocks allocated to the terminal based on the transport block information, and interpreting the DM-RS antenna port allocation indication information according to the number of transport blocks.

First claim

What is claimed is:

1. A control information interpretation method of a terminal in a mobile communication system, the method comprising:
receiving, by the terminal, control information including transport block information and Reference Signal (RS) antenna port allocation indication information that indicates up to eight antenna ports;
checking a number of transport blocks allocated to the terminal based on the transport block information; and
interpreting the RS antenna port allocation indication information according to the number of transport blocks allocated to the terminal,
wherein the RS antenna port allocation indication information is used for data demodulation.

2. The method of claim 1 , wherein, if one transport block is enabled, the RS antenna port allocation indication information is configured to indicate up to 4 antenna ports for 4 layers,
wherein an RS for one layer includes one of a combination of 0 or 1 and a 1 st antenna port or a 2 nd antenna port,
wherein RSs for two layers include the 1 st antenna port and the 2 nd antenna port,
wherein RSs for three layers include the 1 st antenna port, the 2 nd antenna port, and a 3 rd antenna port, and
wherein RSs for four layers include the 1 st antenna port, the 2 nd antenna port, the 3 rd antenna port, and a 4 th antenna port.

3. The method of claim 1 , wherein the control information includes indication information for notifying the terminal as to whether a number of other terminals allocated at least one layer transmitted by a base station is greater than or equal to 1.

4. The method of claim 1 , wherein if two transport blocks are enabled, the RS antenna port allocation indication information is configured to indicate up to 8 antenna ports for 8 layers,
wherein an RS for two layers includes one of a combination of scrambling sequences of 0 or 1 and a 1 st antenna port and a 2 nd antenna port, and
wherein RSs for N layers include N antenna ports, starting from the 1 st antenna port and increasing to an N th antenna port.

5. The method of claim 1 , wherein interpreting the RS antenna port allocation indication information according to the number of transport blocks comprises:
if one transport block is enabled and the one transport block has previously been transmitted using 2, 3, or 4 layers, RSs for 2, 3, or 4 layers are only supported for retransmission of the one transport block.

6. The method of claim 5 , wherein if the one transport block is enabled and the one transport block has previously been transmitted using the 2 layers, the RSs for the 2 layers are supported for the retransmission of the one transport block,
wherein if the one transport block has previously been transmitted using the 3 layers, the RSs for the 3 layers are supported for the retransmission of the one transport block, and
wherein if the one transport block has previously been transmitted using the 4 layers, the RSs for the 4 layers are supported for the retransmission of the one transport block.

7. The method of claim 1 , wherein the RS antenna port allocation indication information includes at least one of an index indicating an RS antenna port 0 allocated a scrambling code 0 in a rank pattern 2, an index indicating an RS antenna port 1 allocated the scrambling code 0 in the rank pattern 2, an index indicating the RS antenna port 0 allocated a scrambling code 1 in the rank pattern 2, an index indicating the RS antenna port 1 allocated the scrambling code 1 in the rank pattern 2, an index indicating the RS antenna ports 0 and 1 allocated the scrambling code 0 in the rank pattern 2, an index indicating the RS antenna ports 0, 1, and 2 allocated the scrambling code 0 in a rank pattern 4, and an index indicating the RS antenna ports 0, 1, 2, and 3 allocated the scrambling code 0 in the rank pattern 4, when the number of transport blocks is 1,
wherein the RS antenna port allocation indication information further includes at least one of an index indicating the RS antenna ports 0 and 1 allocated the scrambling code 0 in the rank pattern 2, an index indicating the RS antenna ports 0, 1, and 2 allocated the scrambling code 0 in the rank pattern 4, an index indicating the RS antenna ports 0 and 1 allocated the scrambling code 1 in the rank pattern 2, an index indicating the RS antenna ports 0, 1, 2, and 3 allocated the scrambling code 0 in the rank pattern 4, an index indicating the RS antenna ports 0, 1, 2, 3, and 4 allocated the scrambling code 0 in a rank pattern 8, an index indicating the RS antenna ports 0, 1, 2, 3, 4, and 5 allocated the scrambling code 0 in the rank pattern 8, an index indicating the RS antenna ports 0, 1, 2, 3, 4, 5, and 6 allocated the scrambling code 0 in the rank pattern 8, and an index indicating the RS antenna ports 0, 1, 2, 3, 4, 5, 6, and 7 allocated the scrambling code 0 in the rank pattern 8, when the number of transport blocks is 2, and
wherein the RS antenna port 0 is a first antenna port allocated an RS, and an arbitrary RS antenna port n is indexed in an ascending order from the RS antenna port 0.

8. A control information transmission method of a base station in a mobile communication system, the method comprising:
checking, by the base station, a number of transport blocks allocated to a terminal;
selecting Reference Signal (RS) antenna port allocation indication information that indicates up to eight antenna ports according to the number of transport blocks allocated to the terminal;
generating control information including transport block information indicating the number of transport blocks and the RS antenna port allocation indication information; and
transmitting the control information to the terminal,
wherein the RS antenna port allocation indication information is used for data demodulation.

9. The method of claim 8 , wherein the control information includes indication information for notifying the terminal as to whether a number of other terminals allocated at least one layer transmitted by a base station is greater than or equal to 1.

10. The method of claim 8 , wherein if one transport block is enabled, the RS antenna port allocation indication information is configured to indicate up to 4 antenna ports for 4 layers,
wherein an RS for one layer includes one of a combination of 0 or 1 and a 1 st antenna port or a 2 nd antenna port,
wherein RSs for two layers include the 1 st antenna port and the 2 nd antenna port,
wherein RSs for three layers include the 1 st antenna port, the 2 nd antenna port, and a 3 rd antenna port, and
wherein RSs for four layers include the 1 st antenna port, the 2 nd antenna port, the 3 rd antenna port, and a 4 th antenna port.

11. The method of claim 8 , wherein if two transport blocks are enabled, the RS antenna port allocation indication information is configured to indicate up to 8 antenna ports for 8 layers,
wherein an RS for two layers includes one of a combination of scrambling sequences of 0 or 1 and a 1 st antenna port and a 2 nd antenna port, and
wherein RSs for N layers include N antenna ports, starting from the 1 st antenna port and increasing to an N th antenna port.

12. The method of claim 8 , wherein if one transport block is enabled and the one transport block has previously been transmitted using 2, 3, or 4 layers, RSs for 2, 3, or 4 layers are only supported for retransmission of the one transport block.

13. The method of claim 12 , wherein if the one transport block is enabled and the one transport block has previously been transmitted using the 2 layers, the RSs for the 2 layers are supported for the retransmission of the one transport block,
wherein if the one transport block

Assignees

• Kim Youn Sun
• Han Jin Kyu
• Kim Sung Tae
• Yeon Myung Hoon
• Shan Cheng
• Lee In Ho
• Samsung Electronics Co Ltd

Inventors

• Kim Youn Sun
• Han Jin Kyu
• Kim Sung Tae
• Yeon Myung Hoon
• Shan Cheng
• Lee In Ho

Classifications

• H04W72/563

  of the wireless resources · CPC title

• H04L5/0026

  Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL] · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0023 Primary

  Time-frequency-space · CPC title