Method and apparatus for transmitting and receiving common channel information in wireless communication system

Abstract

Methods and apparatus are provided for transmission and reception of common channel information in a mobile communication system using multi-antenna-based beamforming. A number of beams to be used for transmission to a terminal is determined at a base station. The common channel information is generated corresponding to the number of beams. The common channel information is transmitted from the base station to the terminal through one of the beams.

What is claimed is: 
     
       1. A method by a base station of a mobile communication system using multi-antenna-based, beamforming, the method comprising:
 identifying a plurality of beams to be used for transmission; and   transmitting, to each terminal in a cell of the base station, common channel information through each of the plurality of the beams,   wherein the common channel information is information to be commonly applied to terminals which belong to the cell of the base station,   wherein the common channel information comprises a synchronization channel including a first synchronization signal and a second synchronization signal, and   wherein the common channel information transmitted through each of the plurality of beams to each terminal is included in different subframes in a frame and the first synchronization signal includes a beam-specific code, which is a synchronization channel-specific code determined differently depending on the beam, such that each terminal identifies a sublime carrying the first synchronization signal based on the beam-specific code for acquiring frame timing.   
     
     
       2. The method of  claim 1 , wherein the common channel information further comprises a broadcast channel. 
     
     
       3. The method of  claim 2 , wherein the broadcast channel comprises a master information block as cell-specific information, the master information block comprising scheduling information on beam-specific information including system information on a certain beam, the beam-specific information comprising at least one of uplink random access information, power control information, Time Division Duplex (TDD) downlink/uplink configuration information. 
     
     
       4. A method by a terminal in a mobile communication system using multi-antenna-based beamforming, the method comprising:
 receiving common channel information transmitted through a beam by a base station, wherein the common channel information is included in a certain subframe in a frame and comprises a synchronization channel including a first synchronization signal and a second synchronization signal, the first synchronization signal including a beam-specific code, which is a synchronization channel-specific code determined differently depending on the beam,   identifying the subframe carrying the first synchronization signal based on the beam-specific code;   acquiring frame timing based on a result of the identification of the subframe; and   receiving a signal transmitted by the base station based on the frame timing,   wherein the common channel information is transmitted through each of a plurality of beams, and the common channel information transmitted through each of the plurality of beams is included in different subframes in a frame,   wherein the common channel information is information to be commonly applied to terminals which belong to a cell of the base station.   
     
     
       5. The method of  claim 4 , wherein the common channel information further comprises a broadcast channel. 
     
     
       6. The method of  claim 5 , wherein the broadcast channel comprises a master information block as cell-specific information, the master information block comprising scheduling information on beam-specific information including system information on a certain beam, the beam-specific information comprising at least one of uplink random access information, power control information, Time Division Duplex (TDD) downlink/uplink configuration information. 
     
     
       7. A base station in a mobile communication system using multi-antenna-based beamforming, the base station comprising:
 a transceiver configured to transmit and receive signals; and   a controller configured to identify a plurality of beams to be used for transmission, and control the transceiver to transmit, to each terminal in a cell of the base station, common channel information through each of the plurality of the beams,   wherein the common channel information is information to be commonly applied to terminals which belong to the cell of the base station,   wherein the common channel information comprises a synchronization channel including a first synchronization signal and a second synchronization signal, and   wherein the common channel information transmitted through each of the plurality of beams to each terminal is included in different subframes in a frame and the first synchronization signal includes a beam-specific code, which is a synchronization channel-specific code determined differently depending on the beam, such that each terminal identifies a subframe carrying the first synchronization signal based on the beam-specific code for acquiring frame timing.   
     
     
       8. The base station of  claim 7 , wherein the common channel information further comprises a broadcast channel. 
     
     
       9. The base station of  claim 8 , wherein the broadcast channel comprises a master information block as cell-specific information, the master information block comprising scheduling information on beam-specific information including system information on a certain beam, the beam-specific information comprising at least one of uplink random access information, power control information, Time Division Duplex (TDD) downlink/uplink configuration information. 
     
     
       10. A terminal in a mobile communication system using multi-antenna-based beamforming, the terminal comprising:
 a transceiver configured to transmit and receive signals to and from a base station; and   a controller configured to control the transceiver to:   receive common channel information transmitted through a beam by a base station, wherein the common channel information is included in a certain subframe in a frame and comprises a synchronization channel including a first synchronization signal and a second synchronization signal, the first synchronization signal including a beam-specific code, which is a synchronization channel-specific code determined differently depending on the beam,   identify the subframe carrying the first synchronization signal based on the beam-specific code,   acquire frame timing based on a result of the identification of the subframe, and   receive a signal transmitted by the base station based on the frame timing,   wherein the common channel information is transmitted through each of a plurality of beams and the common channel information transmitted through each of the plurality of beams is included in different subframes in a frame,   wherein the common channel information is information to be commonly applied to terminals which belong to a cell of the base station.   
     
     
       11. The terminal of  claim 10 , wherein the common channel information further comprises a broadcast channel. 
     
     
       12. The terminal of  claim 11 , wherein the broadcast channel comprises a master information block as cell-specific information, the master information block comprising scheduling information on beam-specific information including system information on a certain beam, the beam-specific information comprising at least one of uplink random access information, power control information, Time Division Duplex (TDD) downlink/uplink configuration information. 
     
     
       13. A terminal for processing synchronization signals and system information in a mobile communication system, the terminal comprising:
 a transceiver; and   a processor configured to:
 receive, from a base station via the transceiver, a block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (BCH), wherein the block is one among a set of blocks and each block in the set of blocks is a candidate for receiving the PSS, SSS and the BCH, 
 obtain master information in the BCH of the block, and 
 receive, from the base station via the transceiver, system information in a downlink shared channel based on the master information in the BCH of the block, 
   wherein the set of blocks are defined based on a time duration corresponding to 5 sub-frames of 10 sub-frames within one frame,   wherein the PSS of the block is separated from the SSS and the BCH in a time domain,   wherein random access information associated with the block is included in the system information,   wherein the block is associated with a beam-specific code and a beam of at least one beam for the set of blocks,   wherein the set of blocks are indexed in an ascending order in the time domain,   wherein a time synchronization is identified based on the block associated with the beam-specific code, and   wherein the system information includes cell-specific information.    
     
     
       14. The terminal of claim 13, wherein each block among the set of blocks is numbered and a position of the block is predetermined.  
     
     
       15. The terminal of claim 13, wherein the processor is further configured to identify a cell identifier (ID) based on the block.  
     
     
       16. The terminal of claim 13, wherein a subset of blocks transmitted from the base station is determined.  
     
     
       17. The terminal of claim 13, wherein the random access information associated with the block includes information on resources for transmitting a physical random access channel.  
     
     
       18. A base station for processing synchronization signals and system information in a mobile communication system, the base station comprising:
 a transceiver; and   a processor configured to:
 transmit, to a terminal via the transceiver, a block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (BCH), wherein the block is one among a set of blocks and each block in the set of blocks is a candidate for receiving the PSS, SSS and the BCH, and 
 transmit, to the terminal via the transceiver, system information in a downlink shared channel based on master information in the BCH, 
   wherein the set of blocks are defined based on a time duration corresponding to 5 sub-frames of 10 sub-frames within one frame,   wherein the PSS of the block is separated from the SSS and the BCH in a time domain,   wherein the master information is transmitted in the BCH,   wherein random access information associated with the block is included in the system information,   wherein the block is associated with a beam-specific code and a beam of at least one beam for the set of blocks,   wherein the set of blocks are indexed in an ascending order in the time domain,   wherein a time synchronization is identified based on the block associated with the beam-specific code, and   wherein the system information includes cell-specific information.    
     
     
       19. The base station of claim 18, wherein each block among the set of blocks is numbered and a position of the block is predetermined.  
     
     
       20. The base station of claim 18, wherein a cell identifier (ID) is identified based on the block.  
     
     
       21. The base station of claim 18, wherein the processor is further configured to determine a subset of blocks to be transmitted.  
     
     
       22. The base station of claim 18, wherein the random access information associated with the block includes information on resources for transmitting a physical random access channel.  
     
     
       23. A method for processing synchronization signals and system information in a mobile communication system, the method comprising:
 receiving, from a base station, a block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (BCH), wherein the block is one among a set of blocks and each block in the set of blocks is a candidate for transmitting the PSS, SSS and the BCH;   obtaining master information in the BCH of the block; and   receiving, from the base station, system information in a downlink shared channel based on the master information in the BCH of the block,   wherein the set of blocks are defined based on a time duration corresponding to 5 sub-frames of 10 sub-frames within one frame,   wherein the PSS of the block is separated from the SSS and the BCH in a time domain,   wherein random access information associated with the block is included in the system information,   wherein the block is associated with a beam-specific code and a beam of at least one beam for the set of blocks,   wherein the set of blocks are indexed in an ascending order in the time domain,   wherein a time synchronization is identified based on the block associated with the beam-specific code, and   wherein the system information includes cell-specific information.    
     
     
       24. The method of claim 23, wherein each block among the set of blocks is numbered and a position of the block is predetermined.  
     
     
       25. The method of claim 23, further comprising identifying a cell identifier (ID) based on the block.  
     
     
       26. The method of claim 23, wherein a subset of blocks transmitted from the base station is determined.  
     
     
       27. The method of claim 23, wherein the random access information associated with the block includes information on resources for transmitting a physical random access channel.  
     
     
       28. A method for processing synchronization signals and system information in a mobile communication system, the method comprising:
 transmitting, to a terminal, a block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (BCH), wherein the block is one among a set of blocks and each block in the set of blocks is a candidate for transmitting the PSS, SSS and the BCH; and   transmitting, to the terminal, system information in a downlink shared channel based on master information in the BCH,   wherein the set of blocks are defined based on a time duration corresponding to 5 sub-frames of 10 sub-frames within one frame,   wherein the PSS of the block is separated from the SSS and the BCH in a time domain,   wherein the master information is transmitted in the BCH,   wherein random access information associated with the block is included in the system information,   wherein the block is associated with a beam-specific code and a beam of at least one beam for the set of blocks,   wherein the set of blocks are indexed in an ascending order in the time domain,   wherein a time synchronization is identified based on the block associated with the beam-specific code, and   wherein the system information includes cell-specific information.    
     
     
       29. The method of claim 28, wherein each block among the set of blocks is numbered and a position of the block is predetermined.  
     
     
       30. The method of claim 28, wherein a cell identifier (ID) is identified based on the block.  
     
     
       31. The method of claim 28, further comprising determining a subset of blocks to be transmitted.  
     
     
       32. The method of claim 28, wherein the random access information associated with the block includes information on resources for transmitting a physical random access channel.