Method and apparatus for transmitting frames

Patent metadata

Field	Value
Publication number	US-2016135083-A1
Application number	US-201514935375-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Nov 7, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

A method for transmitting frames by a device in a wireless local area network is provided. The method includes transmitting a first frame including a recommended transmission rate and receiving a second frame transmitted as a response of the first frame, in which the second frame is transmitted at a rate determined based on the recommended transmission rate.

First claim

What is claimed is:

1 . A method for transmitting frames by a device in a wireless local area network, the method comprising:
transmitting a first frame including a recommended transmission rate; and receiving a second frame transmitted as a response of the first frame, wherein the second frame is transmitted at a rate determined based on the recommended transmission rate.

2 . The method of claim 1 , wherein:
the recommended transmission rate is included in a transmission rate recommendation field, and the transmission rate recommendation field is included in a PHY header or a MAC header of the first frame.

3 . The method of claim 2 , wherein:
the transmission rate recommendation field is included in a signal field of the first frame.

4 . The method of claim 2 , wherein:
the transmission rate recommendation field includes a value indicating a designated transmission rate or modulation and coding scheme (MCS) index.

5 . The method of claim 1 , wherein:
a duration field of the first frame includes a duration value, and the duration value is determined based on a transmission time of the second frame transmitted at the recommended transmission rate.

6 . The method of claim 5 , wherein:
a legacy signal (L-SIG) field of the first frame includes a data length, and the data length is determined based on the first frame and the transmission time of the second frame transmitted at the recommended transmission rate.

7 . The method of claim 1 , further comprising:
determining the recommended transmission rate based on an interference condition.

8 . The method of claim 7 , wherein:
in the determining of the recommended transmission rate, when an interference level is equal to or more than a first reference value, the recommended transmission rate is determined as a lower rate than a basic rate or when the interference level is equal to or less than a second reference value, the recommended transmission rate is determined as a higher rate than the basic rate, the second reference value is a smaller than the first reference value, and the basic rate is the highest rate among a basic transmission rate set of a basic service set (BSS) while being equal to or less than a transmission rate of the first frame.

9 . A method for transmitting frames by a device in a wireless local area network, the method comprising:
receiving a first frame including a recommended transmission rate; and transmitting a second frame at a transmission rate determined based on the recommended transmission rate.

10 . The method of claim 9 , wherein:
the recommended transmission rate is included in a transmission rate recommendation field of the first frame, and the transmission rate recommendation field is included in a PHY header or a MAC header of the first frame.

11 . The method of claim 10 , wherein:
the transmission rate recommendation field is included in a signal field of the first frame.

12 . The method of claim 9 , wherein:
a transmission rate recommendation field includes a value indicating a designated transmission rate or modulation and coding scheme (MCS) index.

13 . The method of claim 9 , wherein:
the transmission rate of the second frame is determined as a same rate as the recommended transmission rate.

14 . The method of claim 9 , wherein:
the transmission rate of the second frame is determined as a higher rate or lower rate than the recommended transmission rate.

15 . A wireless local area network (WLAN) device, comprising:
a processor generating a first frame including a recommended transmission rate; and a transceiver transmitting the first frame and receiving a second frame transmitted as a response of the first frame, wherein the second frame is transmitted at a rate determined based on the recommended transmission rate.

16 . The WLAN device of claim 15 , wherein:
the processor inserts the recommended transmission rate into a designated field of the first frame.

17 . The WLAN device of claim 15 , wherein:
the processor calculates a transmission time of the second frame transmitted at the recommended transmission rate and sets a duration value of a duration field of the first frame based on the transmission time.

18 . The WLAN device of claim 15 , wherein:
the processor calculates the first frame and a transmission time of the second frame transmitted at the recommended transmission rate and sets a data length of a legacy signal (L-SIG) field of the first frame based on the transmission time.

19 . The WLAN device of claim 15 , wherein:
the processor determines the recommended transmission rate based on an interference condition.

20 . The WLAN device of claim 19 , wherein:
the processor determines a lower rate than a basic rate as the recommended transmission rate when an interference level is equal to or more than a first reference value or determines a higher rate than the basic rate as the recommended transmission rate when the interference level is equal to or less than a second reference value, the second reference value is smaller than the first reference value, and the basic rate is the highest rate among a basic transmission rate set of a basic service set (BSS) while being equal to or less than a transmission rate of the first frame.

Assignees

• Newracom Inc

Inventors

• Lee Ilgu
• Shin Jeongchul
• Kim Kyeongpyo

Classifications

• H04W28/22 Primary

  Negotiating communication rate · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W28/06 Primary

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title