METHOD AND APPARATUS FOR TRANSMITTING A FRAME IN A WIRELESS RAN SYSTEM

• US 20120044925A1
• Filed: 12/03/2010
• Published: 02/23/2012
• Est. Priority Date: 12/03/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Dae Won, Kang, Byeong Woo, Noh, Yu Jin, Kim, Bong Hoe, Seok, Yong Ho
• Granted Patent: US 8,848,680 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

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.

Claims

1. A method of a transmission station transmitting a frame in a Wirless Local Area Network (WLAN) system, the method comprising:

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,

wherein the PLCP header comprises a partial Association ID (AID) of the target station.

2. The method of claim 1, wherein the partial AID of the target station is obtained from an AID allocated by an Access Point (AP) in a process of the target station being associated with the AP.

3. The method of claim 2, wherein:

a length of the AID is 16 bits, and

the partial AID is set to 9 bits of a low order from among the 16 bits of the AID.

4. The method of claim 1, wherein:

the partial AID is included in a VHTSIG field of the PLCP header, and

the VHTSIG field includes control information for the target station to receive the PPDU and to demodulate and decode the PPDU.

5. The method of claim 1, wherein the partial AID includes information indicating whether each of the transmission station and the target station is an AP or a non-AP station.

6. A method of a transmission station transmitting a frame in a WLAN system, the method comprising:

generating a plurality of MPDUs to be transmitted to a plurality of respective target stations;

generating PPDUs by attaching a PLCP header to the plurality of MPDUs, and

simultaneously transmitting the PPDUs to the plurality of target stations,

wherein the PLCP header comprises a group ID indicating the plurality of target stations.

7. The method of claim 6, wherein:

the group ID is included in a VHTSIG field of the PLCP header, and

the VHTSIG field includes control information in common applied to the plurality of target stations.

8. A station operating in a WLAN system, comprising:

a transceiver configured to transmit or receive a PPDU; and

a processor functionally connected to the transceiver,

wherein the processor is configured to;

generate an MPDU to be transmitted to a target station;

generate a PPDU by attaching a PLCP header to the MPDU; and

transmit the PPDU to the target station, and

the PLCP header comprises a partial AID of the target station.

9. The station of claim 8, wherein the partial AID of the target station is obtained from an AID allocated by an AP in a process of the target station being associated with the AP.

10. The station of claim 9, wherein:

a length of the AID is 16 bits, and

the partial AID is set to 9 bits of a low order from among the 16 bits of the AID.

11. The station of claim 8, wherein:

the partial AID is included in a VHTSIG field of the PLCP header, and

the VHTSIG field includes control information necessary for the target station to receive the PPDU and to demodulate and decode the PPDU.

12. The station of claim 8, wherein the partial AID includes information indicating whether each of the transmission station and the target station is an AP or a non-AP station.