Data transmission method using packet aggregation

Abstract

In the data transmission method, a MAC layer receives data from an upper layer, classifies the data according to destination addresses and traffic identifiers, aggregates the data by destination address and traffic identifier as a first transmission unit, aggregates the first transmission units having the identical destination address as a second transmission unit, and transmits the second transmission units having different destination addresses in a single frame. The data transmission method allows packets transferred from the upper layer to be hierarchically aggregated by DAs and TIDs and then packaged into a data unit for each destination such that it is possible to transmit the data at an optimal data rate for each destination terminal.

What is claimed is: 
     
       1. A data transmission apparatus in a wireless communication system, the data transmission apparatus comprising: means for aggregating MAC (Media Access Control) Service Data Units (MSDUs) received from an upper layer having a same destination address as a first aggregate data unit; means for forming a MAC Protocol Data Unit (MPDU) by attaching a header to the first aggregate data unit; and means for aggregating the MPDU including the first aggregate data unit with another MPDU having the same destination address to form a second aggregate data unit, unit; wherein the second aggregate data unit is transmitted via a Physical Protocol Data Unit (PPDU). 
     
     
       2. The data transmission apparatus as claimed in  claim 1 , wherein the header is a Media Access Control (MAC) header. 
     
     
       3. The data transmission apparatus as claimed in  claim 2 , wherein the MAC header includes the destination address of the aggregated data. 
     
     
       4. A data transmission method for a data transmission apparatus in a wireless communication system, the data transmission method comprising: aggregating at a data transmission apparatus MAC (Media Access Control) Service Data Units (MSDUs) received from an upper layer having a same destination address as a first aggregate data unit; forming a MAC Protocol Data Unit (MPDU) by attaching a header to the first aggregate data unit; and aggregating the MPDU including the first aggregate data unit with another MPDU having the same destination address to form a second aggregate data unit, unit; wherein the second aggregate data unit is transmitted via a Physical Protocol Data Unit (PPDU). 
     
     
       5. The data transmission method as claimed in  claim 4 , wherein the header is a Media Access Control (MAC) header. 
     
     
       6. The data transmission method as claimed in  claim 5 , wherein the MAC header includes the destination address of the aggregated data. 
     
     
       7. A data reception apparatus in a wireless communication system, the data reception apparatus comprising:
 a receiver configured to receive a first aggregate data unit formed by aggregating a first Media Access Control (MAC) Protocol Data unit (MPDU) comprising a second aggregate data unit with a second MPDU having a same destination address as the first MPDU, the first MPDU being formed by attaching a header to the second aggregate data unit, and the second aggregate data unit being formed by aggregating MAC Service Data Units (MSDUs) each having the destination address of the first MPDU; and   a processor configured to acquire the first MPDU and the second MPDU from the first aggregate data unit.    
     
     
       8. The data reception apparatus as claimed in claim 7, wherein the receiver is further configured to receive the first aggregate data unit via a Physical Protocol Data Unit (PPDU).  
     
     
       9. The data reception apparatus as claimed in claim 7, wherein the header is a Media Access Control (MAC) header.  
     
     
       10. The data reception apparatus as claimed in claim 9, wherein the MAC header comprises the destination address of the MSDUs aggregated to form the second aggregate data unit.  
     
     
       11. A data reception method in a wireless communication system, the data reception method comprising:
 receiving, by a data reception apparatus, a first aggregate data unit formed by aggregating a first Media Access Control (MAC) Protocol Data Unit (MPDU) comprising a second aggregate data unit with a second MPDU having a same destination address as the first MPDU, the first MPDU being formed by attaching a header to the second aggregate data unit, the second aggregate data unit being formed by aggregating MAC Service Data Units (MSDUs) each having the destination address of the first MPDU; and   acquiring, by the data reception apparatus, the first MPDU and the second MPDU from the first aggregate data unit.    
     
     
       12. The data reception method as claimed in claim 11, wherein the receiving comprises receiving the first aggregate data unit via a Physical Protocol Data Unit (PPDU).  
     
     
       13. The data reception method as claimed in claim 11, wherein the header is a Media Access Control (MAC) header.  
     
     
       14. The data reception method as claimed in claim 13, wherein the MAC header comprises the destination address of the MSDUs aggregated to form the second aggregate data unit.  
     
     
       15. A data reception apparatus in a wireless communication system, the data reception apparatus comprising:
 a receiver configured to receive a first aggregate data unit formed by aggregating a first MAC (Media Access Control) Protocol Data Unit (MPDU) comprising a second aggregate data unit with a second MPDU having a same destination as the first MPDU, the first MPDU being formed by attaching a header to the second aggregate data unit, and the second aggregate data unit being formed by aggregating MAC Service Data Units (MSDUs) each having a same destination address as one another and a same traffic identifier as one another; and   a processor configured to acquire the first MPDU and the second MPDU from the first aggregate data unit.    
     
     
       16. The data reception apparatus as claimed in claim 15, wherein the receiver is further configured to receive the first aggregate data unit via a Physical Protocol Data Unit (PPDU).  
     
     
       17. The data reception apparatus as claimed in claim 15, wherein the header is a Media Access Control (MAC) header.  
     
     
       18. The data reception apparatus as claimed in claim 17, wherein the MAC header comprises the destination address of the MSDUs aggregated to form the second aggregate data unit.  
     
     
       19. The data reception apparatus as claimed in claim 15, wherein the first MPDU and the second MPDU included in the first aggregate data unit have mutually different traffic identifiers.  
     
     
       20. A data reception method for a data reception apparatus in a wireless communication system, the data reception method comprising:
 receiving, by a data reception apparatus, a first aggregate data unit formed by aggregating a first MAC (Media Access Control) Protocol Data Unit (MPDU) comprising a second aggregate data unit with a second MPDU having a same destination as the first MPDU, the first MPDU being formed by attaching a header to the second aggregate data unit, and the second aggregate data unit being formed by aggregating MAC Service Data Units (MSDUs) each having a same destination address as one another and a same traffic identifier as one another; and   acquiring, by the data reception apparatus, the first MPDU and the second MPDU from the first aggregate data unit.    
     
     
       21. The data reception method as claimed in claim 20, wherein the receiving comprises receiving the first aggregate data unit via a Physical Protocol Data Unit (PPDU).  
     
     
       22. The data reception method as claimed in claim 20, wherein the header is a Media Access Control (MAC) header.  
     
     
       23. The data reception method as claimed in claim 22, wherein the MAC header comprises the destination address of the MSDUs aggregated to form the second aggregate data unit.  
     
     
       24. The data reception method as claimed in claim 20, wherein the first MPDU and the second MPDU included in the first aggregate data unit have mutually different traffic identifiers.