Method and apparatus for transmitting and receiving data via media access control protocol in mobile communication system

Abstract

Disclosed is a method and an apparatus for transmitting and receiving data via a MAC protocol in a mobile communication system. The method includes inputting at least one Service Data Unit (SDU) containing transmission data through a corresponding logical channel and generating at least one first Protocol Data Unit (PDU) that includes said at least one SDU without including multiplexing information for identification of the logical channel, by a first transmission entity; acquiring the first PDU and generating a second PDU including the first PDU in a payload of the second PDU, by a second transmission entity that operates between the first transmission entity and a physical layer; inserting the multiplexing information for identification of the logical channel corresponding to said at least one first PDU into header information of the second PDU; and transmitting the second PDU through the physical layer. The method can reduce load due to additional processing, such as a bit operation or memory copying, in a receiver requiring high speed data transmission.

What is claimed is: 
     
       1. A method for transmitting data via a MAC (Media Access Control) protocol in a mobile communication system, the method comprising the steps of:
 inputting at least one Service Data Unit (SDU) containing transmission data through a corresponding logical channel and generating at least one first Protocol Data Unit (PDU) that includes said at least one SDU without including multiplexing information for identification of the logical channel, by a first transmission entity; 
 acquiring the first PDU and generating a second PDU including the first PDU in a payload of the second PDU, by a second transmission entity that operates between the first transmission entity and a physical layer; 
 inserting the multiplexing information for identification of the logical channel corresponding to said at least one first PDU into header information of the second PDU; and 
 transmitting the second PDU through the physical layer. 
 
     
     
       2. The method of  claim 1 , wherein the header information of the second PDU is configured to achieve byte alignment. 
     
     
       3. The method of  claim 1 , wherein, when the second PDU includes only one first PDU from a single logical channel, the multiplexing information is set to have a predetermined value indicating that logical channel multiplexing is not used. 
     
     
       4. The method of  claim 1 , wherein the header information of the second PDU includes information of an identical size of said at least one first PDU, an N field indicating the number of first PDUs delivered from the logical channel, and an F field indicating if there exists a further information field constituting the header information. 
     
     
       5. The method of  claim 4 , wherein the header information of the second PDU further includes a Version Flag field indicating a protocol version of the second PDU, a Queue Identifier field indicating a reordering queue of a receiver for storage of the second PDU, and a Transmission Sequence Number field of the second PDU. 
     
     
       6. The method of  claim 1 , wherein the header information of the second PDU includes multiplexing information and format information, which are not repeated for multiple PDUs from one logical channel. 
     
     
       7. A method for receiving data via a MAC protocol in a mobile communication system, the method comprising the steps of:
 receiving, by a first reception entity, a first PDU including header information and a payload through a physical layer; 
 reading multiplexing information for identification of a logical channel corresponding to at least one second PDU contained in the payload and format information of said at least one second PDU, from the header information of the first PDU; and 
 identifying the second PDU from the payload based on the format information and delivering the identified second PDU to a second reception entity. 
 
     
     
       8. The method of  claim 7 , wherein the header information of the first PDU is configured to achieve byte alignment. 
     
     
       9. The method of  claim 7 , further comprising determining that the first PDU includes only one second PDU from only one logical channel, when the multiplexing information is set to have a predetermined value indicating that logical channel multiplexing is not used. 
     
     
       10. The method of  claim 7 , wherein the header information of the first PDU includes information of an identical size of said at least one second PDU, an N field indicating the number of second PDUs delivered from the logical channel, and an F field indicating if there exists a further information field constituting the header information. 
     
     
       11. The method of  claim 10 , wherein the header information of the first PDU further includes a Version Flag field indicating a protocol version of the first PDU, a Queue Identifier field indicating a reordering queue of a receiver for storage of the first PDU, and a Transmission Sequence Number field of the first PDU. 
     
     
       12. The method of  claim 7 , wherein the header information of the first PDU includes multiplexing information and format information, which are not repeated for multiple PDUs from one logical channel. 
     
     
       13. An apparatus for transmitting data via a MAC protocol in a mobile communication system, the method apparatus comprising:
 a first transmission entity for inputting at least one Service Data Unit (SDU) containing transmission data through a corresponding logical channel and generating at least one first Protocol Data Unit (PDU) that includes said at least one SDU without including multiplexing information for identification of the logical channel; and 
 a second transmission entity for acquiring the first PDU and generating a second PDU including the first PDU in a payload of the second PDU, inserting the multiplexing information for identification of the logical channel corresponding to said at least one first PDU into header information of the second PDU, and transmitting the second PDU through the physical layer, the second transmission entity operating between the first transmission entity and a physical layer. 
 
     
     
       14. The apparatus of  claim 13 , wherein the second transmission entity configures the header information of the second PDU to achieve byte alignment. 
     
     
       15. The apparatus of  claim 13 , wherein, when the second PDU includes only one first PDU from a single logical channel, the second transmission entity sets the multiplexing information to have a predetermined value indicating that logical channel multiplexing is not used. 
     
     
       16. The apparatus of  claim 13 , wherein the header information of the second PDU includes information of an identical size of said at least one first PDU, an N field indicating the number of first PDUs delivered from the logical channel, and an F field indicating if there exists a further information field constituting the header information. 
     
     
       17. The apparatus of  claim 16 , wherein the header information of the second PDU further includes a Version Flag field indicating a protocol version of the second PDU, a Queue Identifier field indicating a reordering queue of a receiver for storage of the second PDU, and a Transmission Sequence Number field of the second PDU. 
     
     
       18. The apparatus of  claim 13 , wherein the header information of the second PDU includes multiplexing information and format information, which are not repeated for multiple PDUs from one logical channel. 
     
     
       19. An apparatus for receiving data via a MAC protocol in a mobile communication system, the apparatus comprising:
 a first reception entity for receiving a first PDU including header information and a payload through a physical layer, reading multiplexing information for identification of a logical channel corresponding to at least one second PDU contained in the payload and format information of said at least one second PDU, from the header information of the first PDU, identifying the second PDU from the payload based on the format information, and outputting the second PDU; and 
 a second reception entity for delivering the second PDU to a higher layer entity. 
 
     
     
       20. The apparatus of  claim 19 , wherein the header information of the first PDU is configured to achieve byte alignment. 
     
     
       21. The apparatus of  claim 19 , wherein the first reception entity determines that the first PDU includes only one second PDU from only one logical channel, when the multiplexing information is set to have a predetermined value indicating that logical channel multiplexing is not used. 
     
     
       22. The apparatus of  claim 19 , wherein the header information of the first PDU includes information of an identical size of said at least one second PDU, an N field indicating the number of second PDUs delivered from the logical channel, and an F field indicating if there exists a further information field constituting the header information. 
     
     
       23. The apparatus of  claim 22 , wherein the header information of the first PDU further includes a Version Flag field indicating a protocol version of the first PDU, a Queue Identifier field indicating a reordering queue of a receiver for storage of the first PDU, and a Transmission Sequence Number field of the first PDU. 
     
     
       24. The apparatus of  claim 19 , wherein the header information of the first PDU includes multiplexing information and format information, which are not repeated for multiple PDUs from one logical channel. 
     
     
       25. A method for transmitting data via a Media Access Control (MAC) protocol in a mobile communication system, the method comprising the steps of:
 receiving, by a first transmission entity, a Service Data Unit (SDU) including transmission data to be transmitted, and generating a first Protocol Data Unit (PDU) including the SDU; and   receiving, by a second transmission entity that operates between the first transmission entity and a physical layer, the first PDU, generating a second PDU including a payload that includes the first PDU, and transmitting the second PDU to the physical layer,   wherein a header of the second PDU includes a first information field identifying a logical channel corresponding to the first PDU,   wherein the header of the second PDU and the second PDU are byte aligned in length, and   wherein the header of the second PDU further includes a length field indicating a length of the first PDU and a second information field indicating whether or not more fields are present in the header of the second PDU.   
     
     
       26. The method of claim 25, wherein the payload of the second PDU further includes a plurality of the first PDUs, and
 wherein the header of the second PDU further includes a plurality of the first information fields for identifying logical channels corresponding to each of the plurality of the first PDUs, respectively, and   wherein the length field indicates a length of each of the plurality of the first PDUs.   
     
     
       27. The method of claim 25, wherein the header of the second PDU further includes a field corresponding to padding. 
     
     
       28. A method for receiving data via a Media Access Control (MAC) protocol in a mobile communication system, the method comprising the steps of:
 receiving, by a first reception entity, a first Protocol Data Unit (PDU) including a header and a payload from a physical layer;   reading information for identifying a logical channel corresponding to a second PDU included in the payload of the first PDU and format information of the second PDU, from the header of the first PDU;   identifying the second PDU from the payload of the first PDU, based on the format information; and   delivering the identified second PDU to a second reception entity,   wherein the header of the first PDU and the first PDU are byte aligned in length, and   wherein the format information comprises a length field indicating a length of the second PDU and an information field indicating whether or not more fields are present in the header of the first PDU.   
     
     
       29. The method of claim 28, wherein the payload of the first PDU further includes a plurality of the second PDUs, and
 wherein the header of the first PDU further includes a plurality of the information for identifying logical channels corresponding to each of the plurality of the second PDUs, respectively, and   wherein the length field indicates a length of each of the plurality of the second PDUs.   
     
     
       30. The method of claim 28, wherein the header of the first PDU further includes a field corresponding to padding. 
     
     
       31. An apparatus for transmitting data via a Media Access Control (MAC) protocol in a mobile communication system, the apparatus comprising:
 a first transmission entity for receiving a Service Data Unit (SDU) including transmission data to be transmitted and generating a first Protocol Data Unit (PDU) that includes the SDU; and   a second transmission entity, which operates between the first transmission entity and a physical layer, for receiving the first PDU and generating a second PDU including a payload that includes the first PDU, and transmitting the second PDU to the physical layer,   wherein a header of the second PDU includes a first information field identifying a logical channel corresponding to the first PDU,   wherein the header of the second PDU and the second PDU are byte aligned in length, and   wherein the header of the second PDU further includes a length field indicating a length of the first PDU and a second information field indicating whether or not more fields are present in the header of the second PDU.   
     
     
       32. The apparatus of claim 31, wherein the payload of the second PDU further includes a plurality of the first PDUs, and
 wherein the header of the second PDU further includes a plurality of the first information fields for identifying logical channels corresponding to each of the plurality of the first PDUs, respectively, and   wherein the length field indicates a length of each of the plurality of the first PDUs.   
     
     
       33. The apparatus of claim 31, wherein the header of the second PDU further includes a field corresponding to padding. 
     
     
       34. An apparatus for receiving data via a Media Access Control (MAC) protocol in a mobile communication system, the apparatus comprising:
 a first reception entity for receiving a first Protocol Data Unit (PDU) including a header and a payload from a physical layer, reading information for identifying a logical channel corresponding to a second PDU included in the payload of the first PDU and format information of the second PDU, from the header of the first PDU, identifying the second PDU from the payload of the first PDU, based on the format information, and outputting the second PDU; and   a second reception entity for delivering the second PDU to a higher layer entity,   wherein the header of the first PDU and the first PDU are byte aligned in length, and   wherein the format information comprises a length field indicating a length of the second PDU and an information field indicating whether or not more fields are present in the header of the first PDU.   
     
     
       35. The apparatus of claim 34, wherein the payload of the first PDU further includes a plurality of the second PDUs, and
 wherein the header of the first PDU further includes a plurality of the information for identifying logical channels corresponding to each of the plurality of the second PDUs, respectively, and   wherein the length field indicates a length of each of the plurality of the second PDUs.   
     
     
       36. The apparatus of claim 34, wherein the header of the first PDU further includes a field corresponding to padding.