Method for sending/receiving data in a wireless packet communication system in which there is simultaneous communication with various terminals
View Patent ↗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.
1. A transmitter for transmitting a Physical layer Protocol Data Unit (PPDU) in a wireless communication system, the transmitter comprising:
a circuitry configured to:
cause the transmitter to transmit a first signal field for a first station and a second station during a first period of time, the first signal field comprising first information indicating a maximum length among a first data field and a second data field in the PPDU;
cause the transmitter to transmit a training field during a second period of time subsequent to the first period of time;
cause the transmitter to transmit a second signal field during a third period of time subsequent to the second period of time, wherein the second signal field comprises second information indicating a length of the first data field for the first station and third information indicating a length of the second data field for the second station; and
cause the transmitter to transmit the first data field for the first station and the second data field for the second station during a fourth period of time subsequent to the third period of time,
wherein the PPDU comprises the first signal field, the training field, the second signal field, and the first and second data fields, and
wherein the length of the first data field is shorter than the length of the second data field.
2. The transmitter of claim 1 , wherein the PPDU further comprises a service field which indicates scrambling information.
3. A method for transmitting a Physical layer Protocol Data Unit (PPDU) by a transmitter in a wireless communication system, the method comprising:
transmitting a first signal field for a first station and a second station during a first period of time, the first signal field comprising first information indicating a maximum length among a first data field and a second data field in the PPDU;
transmitting a training field during a second period of time subsequent to the first period of time;
transmitting a second signal field during a third period of time subsequent to the second period of time, wherein the second signal field comprises second information indicating a length of the first data field for the first station and third information indicating a length of the second data field for the second station; and
transmitting the first data field for the first station and the second data field for the second station during a fourth period of time subsequent to the third period of time,
wherein the PPDU comprises the first signal field, the training field, the second signal field, and the first and second data fields, and
wherein the length of the first data field is shorter than the length of the second data field.
4. The method of claim 3 , wherein the PPDU further comprises a service field which indicates scrambling information.
5. The transmitter of claim 1 , wherein the circuitry is further configured to:
cause the transmitter to receive a first acknowledgement from the first station; and
cause the transmitter to receive a second acknowledgement from the second station,
wherein the first acknowledgement and the second acknowledgement are received substantially simultaneously.
6. The transmitter of claim 1 , wherein the PPDU further comprises: first padding bits subsequent to the first data field and second padding bits subsequent to the second data field, and a length of the first data field along with the first padding bits is the same as a length of the second data field along with the second padding bits.
7. The transmitter of claim 6 , wherein the PPDU further comprises: first tail bits subsequent to the first padding bits, and second tail bits subsequent to the second padding bits, a length of the first tail bits is the same as a length of the second tail bits, and the first information indicates a combined length of the first data field, first padding bits, and the first tail bits.
8. The method of claim 3 , further comprising:
receiving a first acknowledgement from the first station; and
receiving a second acknowledgement from the second station,
wherein the first acknowledgement and the second acknowledgement are received substantially simultaneously.
9. The method of claim 3 , wherein the PPDU further comprises: first padding bits subsequent to the first data field and second padding bits subsequent to the second data field, and a length of the first data field along with the first padding bits is the same as a length of the second data field along with the second padding bits.
10. The method of claim 9 , wherein the PPDU further comprises: first tail bits subsequent to the first padding bits, and second tail bits subsequent to the second padding bits, a length of the first tail bits is the same as a length of the second tail bits, and the first information indicates a combined length of the first data field, first padding bits, and the first tail bits.
11. A communication apparatus for a transmitter to transmit a Physical layer Protocol Data Unit (PPDU), the apparatus comprising:
a circuitry configured to:
cause the transmitter to transmit a first signal field for a first station and a second station during a first period of time, the first signal field comprising first information indicating a maximum length among a first data field and a second data field in the PPDU;
cause the transmitter to transmit a training field during a second period of time subsequent to the first period of time;
cause the transmitter to transmit a second signal field during a third period of time subsequent to the second period of time, wherein the second signal field comprises second information indicating a length of the first data field for the first station and third information indicating a length of the second data field for the second station; and
cause the transmitter to transmit the first data field for the first station and the second data field for the second station during a fourth period of time subsequent to the third period of time,
wherein the PPDU comprises the first signal field, the training field, the second signal field, and the first and second data fields, and
wherein the length of the first data field is shorter than the length of the second data field.
12. The apparatus of claim 11 , wherein the PPDU further comprises a service field which indicates scrambling information.
13. The apparatus of claim 11 , wherein the circuitry is further configured to:
cause the transmitter to receive a first acknowledgement from the first station; and
cause the transmitter to receive a second acknowledgement from the second station,
wherein the first acknowledgement and the second acknowledgement are received substantially simultaneously.
14. The apparatus of claim 11 , wherein the PPDU further comprises: first padding bits subsequent to the first data field and second padding bits subsequent to the second data field, and a length of the first data field along with the first padding bits is the same as a length of the second data field along with the second padding bits.
15. The apparatus of claim 14 , wherein the PPDU further comprises: first tail bits subsequent to the first padding bits, and second tail bits subsequent to the second padding bits, a length of the first tail bits is the same as a length of the second tail bits, and the first information indicates a combined length of the first data field, first padding bits, and the first tail bits.
16. The transmitter of claim 1 , wherein the second signal field is transmitted immediately subsequent to the training field, and the first data field for the first station and the second data field for the second station are transmitted immediately subsequent to the second signal field.
17. The method of claim 3 , wherein the second signal field is transmitted immediately subsequent to the training field, and the first data field for the first station and the second data field for the second station are transmitted immediately subsequent to the second signal field.
18. The apparatus of claim 11 , wherein the second signal field is transmitted immediately subsequent to the training field, and the first data field for the first station and the second data field for the second station are transmitted immediately subsequent to the second signal field.