Method and apparatus for transmitting a frame in a wireless RAN system
There is provided a method and apparatus for transmitting a frame which is performed by a transmission STA in a WLAN system. The method of transmitting a frame according to the present invention includes generating an MAC Protocol Data Unit (MPDU) to be transmitted to a target station, generating a PLCP Protocol Data Unit (PPDU) by attaching a Physical Layer Convergence Procedure (PLCP) header to the MPDU, and transmitting the PPDU to the target station. The PLCP header comprises a partial Association ID (AID) of the target station.
1. A method of processing a frame by a mobile station in a wireless local area network system, the method comprising:
receiving, by the mobile station from an access point, information about a station identifier having a first length and identifying the mobile station;
receiving, by the mobile station from the access point, a first Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) including a first very High Throughput Signal (VHT-SIG) field and a first PLCP Service Data Unit (PSDU); and
transmitting, by the mobile station to the access point, a second PPDU including a second VHT-SIG field and a second PSDU,
wherein the first VHT-SIG field includes a class type and a first identifier field, the class type being set to a first value indicating that the first PPDU is destined to the mobile station, the first identifier field indicating a partial identifier formed from the station identifier and having a second length shorter than the first length, and
wherein the second VHT-SIG field includes a second class type and a second identifier field, the second class type being set to a second value indicating that the second PPDU is destined to the access point, the second identifier field indicating a part of a Basic Service Set Identifier (BSSID) identifying the access point.
2. The method of claim 1 , wherein the first PPDU is received and the second PPDU is transmitted by adapting single-user multiple input multiple output (SU-MIMO).
3. The method of claim 1 , wherein the first value is different from the second value.
4. The method of claim 1 , wherein the first length is 16 bits and the second length is 9 bits.
5. The method of claim 1 , wherein the station identifier includes an association identifier that is assigned to the mobile station during an association procedure with the access point.
6. A mobile station comprising:
a transceiver; and
a processor functionally connected to the transceiver and configured to:
instruct the transceiver to receive, from an access point, information about a station identifier having a first length and identifying the mobile station;
instruct the transceiver to receive, from the access point, a first Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) including a first Very High Throughput Signal (VHT-SIG) field and a first PLCP Service Data Unit (PSDU); and
instruct the transceiver to transmit, to the access point, a second PPDU including a second VHT-SIG field and a second PSDU,
wherein the first VHT-SIG field includes a class type and a first identifier field, the class type being set to a first value indicating that the first PPDU is destined to the mobile station, the first identifier field indicating a partial identifier formed from the station identifier and having a second length shorter than the first length, and
wherein the second VHT-SIG field includes a second class type and a second identifier field, the second class type being set to a second value indicating that the second PPDU is destined to the access point, the second identifier field indicating a part of a Basic Service Set Identifier (BSSID) identifying the access point.
7. The mobile station of claim 6 , wherein the first length is 16 bits and the second length is 9 bits.
8. The mobile station of claim 6 , wherein the station identifier includes an association identifier that is assigned to the mobile station during an association procedure with the access point.
9. A method for transmitting a frame by an access point in a wireless local area network system, the method comprising:
transmitting, by the access point to a mobile station, information about a station identifier having a first length and identifying the mobile station;
transmitting, by the access point to the mobile station, a first Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) including a first Very High Throughput Signal (VHT-SIG) field and a first PLCP Service Data Unit (PSDU); and
receiving, by the access point from the mobile station, a second PPDU including a second VHT-SIG field and a second PSDU,
wherein the first VHT-SIG field includes a class type and a first identifier field, the class type being set to a first value indicating that the first PPDU is destined to the mobile station, the first identifier field indicating a partial identifier formed from the station identifier and having a second length shorter than the first length, and
wherein the second VHT-SIG field includes a second class type and a second identifier field, the second class type being set to a second value indicating that the second PPDU is destined to the access point, the second identifier field indicating a part of a Basic Service Set Identifier (BSSID) identifying the access point.
10. An access point comprising:
a transceiver; and
a processor functionally connected to the transceiver and configured to:
instruct the transceiver to transmit, to a mobile station, information about a station identifier having a first length and identifying the mobile station;
instruct the transceiver to transmit, to the mobile station, a first Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) including a first Very High Throughput Signal (VHT-SIG) field and a first PLCP Service Data Unit (PSDU); and
instruct the transceiver to receive, from the mobile station, a second PPDU including a second VHT-SIG field and a second PSDU,
wherein the first VHT-SIG field includes a class type and a first identifier field, the class type being set to a first value indicating that the first PPDU is destined to the mobile station, the first identifier field indicating a partial identifier formed from the station identifier and having a second length shorter than the first length, and
wherein the second VHT-SIG field includes a second class type and a second identifier field, the second class type being set to a second value indicating that the second PPDU is destined to the access point, the second identifier field indicating a part of a Basic Service Identifier (BSSID) identifying the access point.