Method of transferring and/or receiving data in communication system and apparatus thereof

Abstract

The present invention relates to Walsh Code Allocation (WCA) field in the Packet Data Control Channel. One of the embodiments of the WCA field is use of the WCA field as Last Walsh Code Index (LWCI) field in the message format of the PDCCH. The LWCI field indicates the corresponding last code index or the corresponding number of Walsh codes in a Walsh Code Index (WCI) Table/List/Set. In alternative embodiments, the WCA indicates a general set of Walsh codes or a specific set of Walsh codes in the WCI table. The WCA fields may or may not be used with one of power ranking and sequential decoding, but is preferable used. The WCA field has various advantages including but not limited to efficient use of system resources.

1. A method of transmitting packet data in a communication system, comprising:
 transmitting a control message over a packet data control channel, the control message having a LWCI field for indicating that a code set used in a packet data channel includes the 0 th  through the LWCI th  codes on a code list; and    transmitting packet data over the packet data channel using the 0 th  through the LWCI th  codes on the code list.    
     
     
       2. The method of  claim 1 , wherein the code allocation information is an index (LWCI) of a last code included in the portion of the code list. 
     
     
       3. The method of  claim 2 , wherein the portion of the code list includes the 0 th  through the LWCI th  code on the code list. 
     
     
       4. The method of  claim 1 , wherein the communication system is supporting a Time Division Multiplexing (TDM). 
     
     
       5. The method of  claim 1 , wherein a code included in the portion of the code list is a Walsh code. 
     
     
       6. The method of  claim 1 , wherein the packet data control channel and the packet data channel are transmitted simultaneously. 
     
     
       7. A method of receiving packet data in a communication system, comprising:
 receiving a control message on a packet data control channel, the control message having a LWCI field indicating that a code set used in a packet data channel includes the 0 th  through the LWCI th  codes on a code list; and    receiving packet data over the packet data channel using the 0 th  through the LWCI th  codes on the code list.    
     
     
       8. The method of  claim 7 , wherein the code allocation information is an index (LWCI) of a last code included in the portion of the code list. 
     
     
       9. The method of  claim 8 , wherein the portion of the code list includes the 0 th  through the LWCI th  code on the code list. 
     
     
       10. The method of  claim 7 , wherein a code included in the portion of the code list is a Walsh code. 
     
     
       11. The method of  claim 7 , further comprising,
 detecting a terminal identifier on the packet data control channel; and    determining whether the terminal identifier is matched with an identifier of a mobile station or not.    
     
     
       12. The method of  claim 11 , wherein the terminal identifier is a MAC identifier. 
     
     
       13. The method of  claim 7 , wherein the code list is stored by a mobile station. 
     
     
       14. The method of  claim 7 , wherein there is a one-to-one mapping between each code index and each code in the code list, and wherein code indices in the code list have a sequential range from a first number to a second number. 
     
     
       15. The method of  claim 14 , wherein lower code indices are assigned to higher priority codes. 
     
     
       16. A method of transmitting packet data at a base station in a communication system, the method comprising:
   transmitting a control message over a packet data control channel to a mobile station, the control message comprising control information to be used by the mobile station to receive packet data on a packet data channel, wherein the control information comprises a start code number and an end code number which define a range of codes allocated to the mobile station to receive the packet data; and        transmitting the packet data over the packet data channel using the control information to the mobile station.     
     
     
       17. The method according to  claim 16 , wherein a transmission unit of the packet data control channel comprises a fixed time length and a transmission unit of the packet data channel comprises a fixed time length. 
     
     
       18. The method according to  claim 16 , wherein a transmission unit of the packet data control channel comprises a first time length and a transmission unit of the packet data channel comprises a second time length, wherein the first time length and the second time length are the same. 
     
     
       19. The method according to  claim 16 , wherein the packet data is transmitted after delaying for a time period after the transmitting of the control message. 
     
     
       20. The method according to  claim 16 , wherein the control message further comprises an identifier field for identifying a user which is to receive the packet data channel. 
     
     
       21. The method according to  claim 16 , wherein the control message further comprises a size field for indicating an amount of information being transmitted on the packet data channel. 
     
     
       22. The method according to  claim 16 , wherein the control message further comprises an automatic repeat request ( ARQ )  channel identifier for identifying which channel of a plurality of packet data channels is being retransmitted.   
     
     
       23. The method according to  claim 16 , wherein the control message further comprises a subpacket identifier field for identifying whether or not information of the packet data channel is being retransmitted. 
     
     
       24. The method according to  claim 16 , wherein the start code is one of a plurality of codes having orthogonality with each other. 
     
     
       25. A method of receiving packet data at a mobile station in a communication system, the method comprising:
   receiving a control message over a packet data control channel from a base station, the control message comprising control information to receive packet data on a packet data channel, wherein the control information comprises a start code number and an end code number which define a range of codes allocated to the mobile terminal to receive the packet data; and        receiving the packet data over the packet data channel using the control information from the base station.     
     
     
       26. The method according to  claim 25 , wherein a transmission unit of the packet data control channel comprises a fixed time length and a transmission unit of the packet data channel comprises a fixed time length. 
     
     
       27. The method according to  claim 25 , wherein a transmission unit of the packet data control channel comprises a first time length and a transmission unit of the packet data channel comprises a second time length, wherein the first time length and the second time length are the same. 
     
     
       28. The method according to  claim 25 , wherein the control message further comprises an identifier field for identifying a user which is to receive the packet data channel. 
     
     
       29. The method according to  claim 25 , wherein the control message further comprises a size field for indicating an amount of information being received on the packet data channel. 
     
     
       30. The method according to  claim 25 , wherein the control message further comprises an automatic repeat request ( ARQ )  channel identifier for identifying which channel of a plurality of packet data channels is being retransmitted.   
     
     
       31. The method according to  claim 25 , wherein the control message further comprises a subpacket identifier field for identifying whether or not information of the packet data channel is being retransmitted. 
     
     
       32. The method according to  claim 25 , wherein the start code number is one of a plurality of codes having orthogonality with each other.