Method for sending/receiving data in a wireless packet communication system in which there is simultaneous communication with various terminals

Abstract

A method and apparatus for transmitting a frame to at least one receiver in a wireless communication system is provided. The apparatus determines at least one data length in accordance with each receiver based on a number of symbol for the frame to be transmitted, determines a maximum data length among the at least one data length, and determines a length of the frame in time domain based on the maximum data length. The apparatus generates the frame in accordance with the length of the frame, the frame including a first signal field and at least one second signal field. The first signal field indicates the length of the frame and each second signal field indicates each data length.

We claim: 
     
         1 . A communicating method comprising:
 receiving a Physical layer Protocol Data Unit (PPDU) from a station, the PPDU comprising a first training field, a first signal field, a second signal field, a second training field, a third signal field and a data field,   wherein:   the data field comprises service bits, an Aggregated MAC Protocol Data Unit (A-MPDU), pad bits and tail bits;   the first signal field comprises information related to a length of the PPDU; and   the third signal field comprises information related to a length of the A-MPDU.   
     
     
         2 . The method of  claim 1 , wherein the first training field precedes the first signal field, the first signal field precedes the second signal field, the second signal field precedes the second training field, the second training field precedes the third signal field, and the third signal field precedes the data field. 
     
     
         3 . The method of  claim 2 , wherein the service bits comprise information related to scrambling. 
     
     
         4 . The method of  claim 3 , wherein the first signal field is a legacy signal (L-SIG) field and the third signal field is a SIG B field. 
     
     
         5 . The method of  claim 4 , further comprising transmitting an acknowledgement to the station based on the information related to the length of the PPDU. 
     
     
         6 . The method of  claim 4 , further comprising processing the A-MPDU based on the information related to the length of the A-MPDU. 
     
     
         7 . A communication apparatus comprising:
 a circuitry,   wherein the circuitry is configured to cause the communication apparatus to receive a Physical layer Protocol Data Unit (PPDU) from a station, the PPDU comprising a first training field, a first signal field, a second signal field, a second training field, a third signal field and a data field,   wherein:   the data field comprises service bits, an Aggregated MAC Protocol Data Unit (A-MPDU), pad bits and tail bits;   the first signal field comprises information related to a length of the PPDU; and   the third signal field comprises information related to a length of the A-MPDU.   
     
     
         8 . The communication apparatus of  claim 7 , wherein the first training field precedes the first signal field, the first signal field precedes the second signal field, the second signal field precedes the second training field, the second training field precedes the third signal field, and the third signal field precedes the data field. 
     
     
         9 . The communication apparatus of  claim 8 , wherein the service bits comprise information related to scrambling. 
     
     
         10 . The communication apparatus of  claim 9 , wherein the first signal field is a legacy signal (L-SIG) field and the third signal field is a SIG B field. 
     
     
         11 . The communication apparatus of  claim 10 , wherein the circuitry is further configured to cause the communication apparatus to transmit an acknowledgement to the station based on the information related to the length of the PPDU. 
     
     
         12 . The communication apparatus of  claim 10 , wherein the circuitry is further configured to cause the communication apparatus to process the A-MPDU based on the information related to the length of the A-MPDU. 
     
     
         13 . A device for a station comprising:
 a circuitry,   wherein the circuitry is configured to cause the station to receive a Physical layer Protocol Data Unit (PPDU) from another station, the PPDU comprising a first training field, a first signal field, a second signal field, a second training field, a third signal field and a data field,   wherein:   the data field comprises service bits, an Aggregated MAC Protocol Data Unit (A-MPDU), pad bits and tail bits;   the first signal field comprises information related to a length of the PPDU; and   the third signal field comprises information related to a length of the A-MPDU.   
     
     
         14 . The device of  claim 13 , wherein the first training field precedes the first signal field, the first signal field precedes the second signal field, the second signal field precedes the second training field, the second training field precedes the third signal field, and the third signal field precedes the data field. 
     
     
         15 . The device of  claim 14 , wherein the service bits comprise information related to scrambling. 
     
     
         16 . The device of  claim 15 , wherein the first signal field is a legacy signal (L-SIG) field and the third signal field is a SIG B field. 
     
     
         17 . The device of  claim 16 , wherein the circuitry is further configured to cause the station to transmit an acknowledgement to the another station based on the information related to the length of the PPDU. 
     
     
         18 . The device of  claim 16 , wherein the circuitry is further configured to cause the station to process the A-MPDU based on the information related to the length of the A-MPDU.