USRE48954EActiveUtility

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

60
Assignee: SAMSUNG ELECTRONICS CO LTDPriority: Feb 11, 2010Filed: Aug 26, 2019Granted: Mar 1, 2022
Est. expiryFeb 11, 2030(~3.6 yrs left)· nominal 20-yr term from priority
Inventors:Youn-Sun KimJin-Kyu HanSung Tae KimMyung Hoon YeonCheng ShanIn Ho Lee
H04W 72/563H04L 5/0094H04L 5/0026H04L 5/0053H04L 5/0023H04L 5/0051H04W 72/0466H04W 72/23H04L 5/0091H04L 5/0048H04W 88/08H04W 72/06
60
PatentIndex Score
0
Cited by
53
References
40
Claims

Abstract

A control information interpretation method of a terminal and a base station in a mobile communication system, and a terminal and a base station concerning the same, respectively, are provided. The control information interpretation method of a terminal includes receiving, by the terminal, control information including transport block information and antenna port related information; identifying whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled based on the transport block information; and interpreting the antenna port related information according to a result of the identification.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A control information interpretation identification method of a terminal in a mobile communication system, the method comprising:
 receiving, by the terminal, downlink control information including first transport block information, second transport block information, and antenna port related information; 
 identifying whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled based on the first transport block information and the second transport block information; and 
 interpretingidentifying the antenna port related information according to a result of the identification, 
 wherein in case that the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports of a demodulation reference signal (DMRS) for 4 layers, and 
 wherein in case that both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports of the DMRS for 8 layers. 
 
     
     
       2. The method of  claim 1 , wherein, if the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports for 4 layers,
 wherein a reference signal (RS) for one layer includes one of a combination of 0 or 1 and a 1st antenna port or a 2nd antenna port,   wherein RSs for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port.   
     
     
       3. The method of  claim 1 , wherein, if both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports for 8 layers,
 wherein reference signals (RSs) for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port,   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port,   wherein RSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port,   wherein RSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port,   wherein RSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and   wherein RSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port.   
     
     
       4. The method of  claim 1 , wherein the antenna port related information includes a maximum rank set to 4, and when the codeword 0 is enabled and the codeword 1 is disabled, a scrambling sequence of 0 or 1 for a rank 1 or 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for one layer include one of a combination of 0 or 1 of a scrambling code and a 1st antenna port or a 2nd antenna port, 
 wherein DMRSs for two layers include the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port. 
 
     
     
       5. The method of  claim 1 , wherein the antenna port related information includes a maximum rank set to 8, and when both the codeword 0 and the codeword 1 are enabled, a scrambling sequence of 0 or 1 for a rank 2 and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for two layers include one of a combination of 0 or 1 of a scrambling code and the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port, 
 wherein DMRSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port, 
 wherein DMRSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port, 
 wherein DMRSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and 
 wherein DMRSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port. 
 
     
     
       6. The method of  claim 1 , wherein interpreting identifying the antenna port related information according to the result of the identification comprises:
 interpretingidentifying the antenna port related information for a rank 1, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and a current transmission is an initial transmission; 
 interpretingidentifying the antenna port related information for all ranks, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and a current transmission is a retransmission; and 
 interpretingidentifying the antenna port related information for all the ranks at the initial transmission and the retransmission, whenin case that both the codeword 0 and the codeword 1 are enabled. 
 
     
     
       7. 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. 
     
     
       8. The method of  claim 1 , wherein the antenna port related information includes at least one of an index indicating a DeModulation Reference Signal (DM-RS) DMRS antenna port 0 allocated a scrambling code 0 in rank pattern 2, an index indicating a DM-RS antenna port 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna port 0 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna port 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, and 2 allocated scrambling code 0 in rank pattern 4, and a an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, when in case that the codeword 0 is enabled and the codeword 1 is disabled, and
 at least one of an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1 and 2 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0, 1, 2, 3, and 4 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, and 5 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, and 6 allocated scrambling code 0 in rank pattern 8, and an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, 6, and 7 allocated scrambling code 0 in rank pattern 8, when in case that both the codeword 0 and the codeword 1 are enabled, and  
 wherein the DM-RS antenna port 0 is a first antenna port allocated to a DM-RSamong all Reference Signals (RSs), and an arbitrary DM-RS antenna port n is indexed in ascending order from the DM-RS antenna port 0. 
 
     
     
       9. A control information transmission method of a base station in a mobile communication system, the method comprising:
 determining, by the base station, whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled; 
 selectingidentifying antenna port related information according to a result of the determination; 
 generating downlink control information including first transport block informationindicating, second transport block and the antenna port related information, wherein the first transport block information and the second transport block information indicate whether the codeword 0 is enabled and the codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabledand the antenna port related information; and 
 transmitting the downlink control information to the terminal, 
 wherein in case that the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports of a demodulation reference signal (DMRS) for 4 layers, and 
 wherein in case that both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports of the DMRS for 8 layers. 
 
     
     
       10. The method of  claim 9 , wherein, if the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports for 4 layers,
 wherein a reference signal (RS) for one layer includes one of a combination of 0 or 1 and a 1st antenna port or a 2nd antenna port,   wherein RSs for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port.   
     
     
       11. The method of  claim 9 , wherein, if both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports for 8 layers,
 wherein reference signals (RSs) for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port,   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port,   wherein RSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port,   wherein RSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port,   wherein RSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and   wherein RSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port.   
     
     
       12. The method of  claim 9 , wherein the antenna port related indication information includes a maximum rank set to 4, and when the codeword 0 is enabled and the codeword 1 is disabled, a scrambling sequence of 0 or 1 for a rank 1 or 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for one layer include one of a combination of 0 or 1 of a scrambling code and a 1st antenna port or a 2nd antenna port, 
 wherein DMRSs for two layers include the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port. 
 
     
     
       13. The method of  claim 9 , wherein the antenna port related information includes a maximum rank set to 8, and when both the codeword 0 and the codeword 1 are enabled, a scrambling sequence of 0 or 1 for a rank 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for two layers include one of a combination of 0 or 1 of a scrambling code and the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port, 
 wherein DMRSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port, 
 wherein DMRSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port, 
 wherein DMRSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and 
 wherein DMRSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port. 
 
     
     
       14. The method of  claim 9 , wherein selecting identifying the antenna port related information comprises:
 selectingidentifying the antenna port related information in a rank 1, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and a current transmission is an initial transmission; 
 selectingidentifying the antenna port related information in all ranks, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and the current transmission is a retransmission; and 
 selectingidentifying the antenna port related information in all the ranks for the initial transmission and the retransmission, whenin case that both the codeword 0 and the codeword 1 are enabled. 
 
     
     
       15. The method of  claim 9 , 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. 
     
     
       16. The method of  claim 9 , wherein the antenna port related information includes at least one of an index indicating a DeModulation Reference Signal (DM-RS) DMRS antenna port 0 allocated a scrambling code 0 in rank pattern 2, an index indicating a DM-RS antenna port 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna port 0 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna port 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, and 2 allocated scrambling code 0 in rank pattern 4, and a an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, when in case that the codeword 0 is enabled and the codeword 1 is disabled, and
 at least one of an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 12 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0, 1, 2, 3, and 4 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, and 5 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, and 6 allocated scrambling code 0 in rank pattern 8, and an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, 6, and 7 allocated scrambling code 0 in rank pattern 8, when in case that both the codeword 0 and the codeword 1 are enabled, and  
 wherein the DM-RS antenna port 0 is a first antenna port allocated a DM-RSamong all Reference Signals (RSs), and an arbitrary DM-RS antenna port n is indexed in ascending order from the DM-RS antenna port 0. 
 
     
     
       17. A terminal for interpreting identifying control information received from a base station in a mobile communication system, the terminal comprising:
 a transceiver configured to receive downlink control information including first transport block information, second transport block information, and antenna port related information; and 
 a controller coupled with the transceiver and configured to: 
 identify whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled based on the first transport block information and the second transport block information, and  
 for interpretingidentify the antenna port related information according to a result of the identification, 
 
 wherein in case that the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports of a demodulation reference signal (DMRS) for 4 layers, and 
 wherein in case that both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports of the DMRS for 8 layers. 
 
     
     
       18. The terminal of  claim 17 , wherein, if the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports for 4 layers,
 wherein a reference signal (RS) for one layer includes one of a combination of 0 or 1 and a 1st antenna port or a 2nd antenna port,   wherein RSs for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port.   
     
     
       19. The terminal of  claim 17 , wherein, if both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports for 8 layers,
 wherein reference signals (RSs) for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port,   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port,   wherein RSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port,   wherein RSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port,   wherein RSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and   wherein RSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port.   
     
     
       20. The terminal of  claim 17 , wherein the antenna port related information comprises a maximum rank set to 4, and when the codeword 0 is enabled and the codeword 1 is disabled, a scrambling sequence of 0 or 1 for a rank 1 or 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for one layer include one of a combination of 0 or 1 of a scrambling code and a 1st antenna port or a 2nd antenna port, 
 wherein DMRSs for two layers include the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port. 
 
     
     
       21. The terminal of  claim 17 , wherein the antenna port related information comprises a maximum rank set to 8, and when both the codeword 0 and the codeword 1 are enabled, a scrambling sequence of 0 or 1 for a rank 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for two layers include one of a combination of 0 or 1 of a scrambling code and the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port, 
 wherein DMRSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port, 
 wherein DMRSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port, 
 wherein DMRSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and 
 wherein DMRSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port. 
 
     
     
       22. The terminal of  claim 17 , wherein the controller is further configured to: 
 interpretidentify the antenna port related information for a rank 1, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and a current transmission is an initial transmission, 
 interpretidentify the antenna port related information for all ranks, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and the current transmission is a retransmission, and 
 interpretsidentify the antenna port related information for all the ranks at the initial transmission and the retransmission, whenin case that both the codeword 0 and the codeword 1 are enabled. 
 
     
     
       23. The terminal of  claim 17 , wherein the control information comprises includes indication information for notifying the terminal as to whether a number of other terminals allocated at least one layer transmitted by the base station is greater than or equal to 1. 
     
     
       24. The terminal of  claim 17 , wherein the antenna port related information comprises:
 at least one of an index indicating a DeModulation Reference Signal (DM-RS) DMRS antenna port 0 allocated a scrambling code 0 in rank pattern 2, an index indicating a DM-RS antenna port 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna port 0 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna port 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, and 2 allocated scrambling code 0 in rank pattern 4, and a an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, when in case that the codeword 0 is enabled and the codeword 1 is disabled; and 
 at least one of an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1 and 2 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0, 1, 2, 3, and 4 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, and 5 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, and 6 allocated scrambling code 0 in rank pattern 8, and an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, 6, and 7 allocated scrambling code 0 in rank pattern 8, when in case that both the codeword 0 and the codeword 1 are enabled, and  
 wherein the DM-RS antenna port 0 is a first antenna port allocated a DM-RSamong all Reference Signals (RSs), and an arbitrary DM-RS antenna port n is indexed in ascending order from the DM-RS antenna port 0. 
 
     
     
       25. A base station for transmitting control information in a mobile communication system, the base station comprising:
 a transceiver; and  
 a controller coupled with the transceiver and configured to: 
 determine whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled, select identify antenna port related information according to a result of the determination, and 
 generate downlink control information including first transport block informationindicating, second transport block information, and the antenna port related information, wherein the first transport block information and the second transport block information indicate whether the codeword 0 is enabled and the codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled and the antenna port related information, and 
 a transceiver configured to transmit the downlink control information to the terminal, 
 
 wherein in case that the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports of a demodulation reference signal (DMRS) for 4 layers, and 
 wherein in case that both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports of the DMRS for 8 layers. 
 
     
     
       26. The base station of  claim 25 , wherein, if the codeword 0 is enabled and the codeword 1 is disabled, the antenna port related information is configured to indicate up to 4 antenna ports for 4 layers,
 wherein a Reference Signal (RS) for one layer includes one of a combination of 0 or 1 and a 1st antenna port or a 2nd antenna port,   wherein RSs for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port.   
     
     
       27. The base station of  claim 25 , wherein, if both the codeword 0 and the codeword 1 are enabled, the antenna port related information is configured to indicate up to 8 antenna ports for 8 layers,
 wherein reference signals (RSs) for two layers include the 1st antenna port and the 2nd antenna port,   wherein RSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port,   wherein RSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port,   wherein RSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port,   wherein RSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port,   wherein RSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and   wherein RSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port.   
     
     
       28. The base station of  claim 25 , wherein the antenna port related information comprises a maximum rank set to 4, and when the codeword 0 is enabled and the codeword 1 is disabled, a scrambling sequence of 0 or 1 for a rank 1 or 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for one layer includes one of a combination of 0 or 1 of a scrambling code and a 1st antenna port or a 2nd antenna port, 
 wherein DMRSs for two layers include the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, and 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port. 
 
     
     
       29. The base station of  claim 25 , wherein the antenna port related information comprises a maximum rank set to 8, and when both the codeword 0 and the codeword 1 are enabled, a scrambling sequence of 0 or 1 for a rank 2, and a scrambling sequence 0 for a rank 3 indicates information on the DMRS,
 wherein DMRSs for two layers include one of a combination of 0 or 1 of a scrambling code and the 1st antenna port and the 2nd antenna port, 
 wherein DMRSs for three layers include the 1st antenna port, the 2nd antenna port, and a 3rd antenna port, 
 wherein DMRSs for four layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, and a 4th antenna port, 
 wherein DMRSs for five layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, and a 5th antenna port, 
 wherein DMRSs for six layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, and a 6th antenna port, 
 wherein DMRSs for seven layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, and a 7th antenna port, and 
 wherein DMRSs for eight layers include the 1st antenna port, the 2nd antenna port, the 3rd antenna port, the 4th antenna port, the 5th antenna port, the 6th antenna port, the 7th antenna port, and an 8th antenna port. 
 
     
     
       30. The base station of  claim 25 , wherein the controller is further configured to: 
 selectidentify the antenna port related information in a rank 1, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and a current transmission is an initial transmission, 
 selectidentify the antenna port related information in all ranks, whenin case that the codeword 0 is enabled and the codeword 1 is disabled and the current transmission is a retransmission, and 
 selectidentify the antenna port related information in all the ranks for the initial transmission and the retransmission, whenin case that both the codeword 0 and the codeword 1 are enabled. 
 
     
     
       31. The base station of  claim 25 , wherein the control information comprises indication information for notifying the terminal as to whether a number of other terminals allocated at least one layer transmitted by the base station is greater than or equal to 1. 
     
     
       32. The base station of  claim 25 , wherein the antenna port related information comprises:
 at least one of an index indicating a DeModulation Reference Signal (DM-RS) DMRS antenna port 0 allocated a scrambling code 0 in rank pattern 2, an index indicating a DM-RS antenna port 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna port 0 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna port 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, and 2 allocated scrambling code 0 in rank pattern 4, and a an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, when in case that the codeword 0 is enabled and the codeword 1 is disabled; and 
 at least one of an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 0 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1 and 2 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0 and 1 allocated scrambling code 1 in rank pattern 2, an index indicating the DM-RS antenna ports 0, 1, 2, and 3 allocated scrambling code 0 in rank pattern 4, an index indicating the DM-RS antenna ports 0, 1, 2, 3, and 4 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, and 5 allocated scrambling code 0 in rank pattern 8, an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, and 6 allocated scrambling code 0 in rank pattern 8, and an index indicating the DM-RS antenna ports 0, 1, 2, 3, 4, 5, 6, and 7 allocated scrambling code 0 in rank pattern 8, when in case that both the codeword 0 and the codeword 1 are enabled, and  
 wherein the DM-RS antenna port 0 is a first antenna port allocated a DM-RSamong all Reference Signals (RSs), and an arbitrary DM-RS antenna port n is indexed in ascending order from the DM-RS antenna port 0. 
 
     
     
       33. The method of claim 1, wherein the antenna port related information is associated with a rank pattern, and
 wherein the rank pattern is information for a number of resource elements (REs) configured to be used for a code division multiplexing (CDM) or DMRSs.    
     
     
       34. The method of claim 33, wherein up to 4 DMRSs are CDMed on one RE set including a plurality of REs, and
 wherein at least a part of the DMRSs on the one RE set is not allocated for the terminal.    
     
     
       35. The method of claim 9, wherein the antenna port related information is associated with a rank pattern, and
 wherein the rank pattern is information for a number of resource elements (REs) configured to be used for a code division multiplexing (CDM) of DMRSs.    
     
     
       36. The method of claim 35, wherein up to 4 DMRSs are CDMed on one RE set including a plurality of REs, and
 wherein at least a part of the DMRSs on the one RE set is not allocated for the terminal.    
     
     
       37. The terminal of claim 17, wherein the antenna port related information is associated with a rank pattern, and
 wherein the rank pattern is information for a number of resource elements (REs) configured to be used for a code division multiplexing (CDM) of DMRSs.    
     
     
       38. The terminal of claim 37, wherein up to 4 DMRSs are CDMed on one RE set including a plurality of REs, and
 wherein at least a part of the DMRSs on the one RE set is not allocated for the terminal.    
     
     
       39. The base station of claim 25, wherein the antenna port related information is associated with a rank pattern, and
 wherein the rank pattern is information for a number of resource elements (REs) configured to be used for a code division multiplexing (CDM) or DMRSs.    
     
     
       40. The base station of claim 39, wherein up to 4 DMRSs are CDMed on one RE set including a plurality of REs, and
 wherein at least a part of the DMRSs on the one RE set is not allocated for the terminal.

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