Method of establishing a first and a second association which are decoupled

Patent metadata

Field	Value
Publication number	US-9380578-B2
Application number	US-201214115345-A
Country	US
Kind code	B2
Filing date	May 7, 2012
Priority date	May 6, 2011
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A method for establishing a first and second association between a main node and respectively a first and second wireless node is disclosed. The first association associates a first virtual access point VAP 1 of the main node and the first node. The first virtual access point transmits to the first node first beacon frames comprising a first item of information BSSID 1 representative of the first association BSS 1 . The first virtual access point VAP 1 is identified by a services set identifier SSID. According to the invention, when the main node receives from the node a request for the establishment of the second association BSS 2 , the method comprises, at controller level, a step of creation of a second virtual access point so as to isolate the transmissions over the associations.

First claim

The invention claimed is:

1. A method for establishing a first and second association between a main node and respectively a first and second wireless node, the first association associating a first virtual access point of the main node and the first node, the first virtual access point transmitting to the first node first beacon frames comprising a first item of information representative of said first association, the first virtual access point being identified by a services set identifier wherein, when the main node receives from the node a request for the establishment of the second association, the method comprises, at the level of a controller:
creating a second virtual access point of the main node transmitting to the second node second beacon frames comprising a second item of information representative of said second association, said second virtual access point being identified by the services set identifier;
initializing a total data transmission bit rate practiced by the first and second node linked to the physical modulation used by respectively the first and second node in the first and second association, initializing a first and second data transmission bit rate required by respectively the first and second node transmitted in the first and second association, and initializing a frame duration;
determining a first and a second temporal interval during which respectively the first node and the first virtual access point on one hand, the second node and the second virtual access point are prohibited from sending the second temporal interval having a frame duration that is proportional to the frame duration and proportional to the first data transmission bit rate required by the first node relative to the total data transmission bit rate, and the first temporal interval having a duration that is proportional to the frame duration and proportional to the second data transmission bit rate required by the second node relative to the total data transmission bit rate;
establishing of the second association between the second node and the second virtual access point; and
transmitting, to the first node at least one item of quiet information representative of a prohibition to transmit during the first temporal interval, and to the second node at least one item of quiet information representative of a prohibition to transmit during the second temporal interval.

2. The method according to claim 1 , wherein the controller sets the frame duration proportional to a ratio between the first data transmission bit rate practised by the first node and the first data transmission bit rate required by the first node, and wherein the second temporal interval has a duration proportional to the frame duration and proportional a ratio between the second data transmission bit rate practiced by the second node and the second data transmission bit rate required by the second node.

3. The method according to claim 1 , wherein said main node is an access point, and in that said first and second node are associated with said access point.

4. The method according to claim 1 , wherein the quiet information is comprised in at least one quiet element of a beacon frame.

5. A controller for establishing a first and second association between a main node and respectively a first and second wireless node, the first association associating a first virtual access point of the main node and the first node, the first virtual access point transmitting to the first node first beacon frames comprising a first item of information representative of said first association, the first virtual access point being identified by a services set identifier, the controller comprising:
a processor having access to memory, wherein the processor executes instructions from the memory, the executed instructions acting to:
create a second virtual access point of the main node transmitting to the second node second beacon frames comprising a second item of information representative of said second association, said second virtual access point being identified by the service set identifier;
initialize a total data transmission bit rate practiced by the first and second node linked to the physical modulation employed by respectively the first and second node in the first and second association, initialize a first and second data transmission bit rate required by respectively the first and second node in the first and second association; and initialize a frame duration;
determine a first and a second temporal interval during which respectively the first node and the first virtual access point, and the second node and the second virtual access point are prohibited from sending;
initialize a total data transmission bit rate practiced by the first and second node linked to the physical modulation used by respectively the first and second node in the first and second association, initialize a first and second data transmission bit rate required by respectively the first and second node in the first and second association; and initialize a frame duration;
establish of the second association between the second node and the second virtual access point; and
a transmitter to transmit, to the first node, at least one item of quiet information representative of a prohibition to transmit during the first temporal interval, and to the second node at least one item of quiet information representative of a prohibition to transmit during the second temporal interval.

Assignees

• Fontaine Patrick
• Piamrat Kandaraj
• Dore Renaud
• Thomson Licensing

Inventors

• Fontaine Patrick
• Piamrat Kandaraj
• Dore Renaud

Classifications

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04W76/10

  Connection setup · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title

• H04W74/0891

  for synchronized access · CPC title

• H04W74/08 Primary

  Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) · CPC title