Effective management of overlapping wireless channels

• US 7,697,476 B2
• Filed: 06/30/2006
• Issued: 04/13/2010
• Est. Priority Date: 06/30/2006
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Octaviano, Raymond Gary II, Locker, Howard Jeffrey, Jakes, Philip John, Cromer, Daryl
• Primary Examiner(s): Jagannathan; Melanie
• Application Number:
  US11/480,266
• Publication Number:
  US 20080002643A1
• Time in Patent Office: 1,383 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

An arrangement facilitating the connection of a client to a network through an access point, particularly in an area with overlapping 0.11n channels. Preferably, a client may communicate with two access points and “ask” one of them to stop transmitting long enough so as to facilitate communication with the other access point. Current specifications otherwise provide no workable arrangement for handling overlapping channels.

Claims

1. A method comprising:

scanning an area via a client to determine if transmissions from a plurality of access points will interfere;

upon a determination by the client that transmissions from the plurality of access points to the client will interfere, selecting via the client a primary access point for the client;

receiving at the client at least one request, from the primary access point, for a communication window for the client; and

establishing a communication window via the client for the primary access point and the client;

wherein establishing a communication window between the client and the primary access point ensures transmissions from all other access points available to the client cease, thereby preventing transmission of interfering signals;

wherein the transmissions from the plurality of access points comprise interfering transmissions on one or more 40 MHz channels;

wherein the one or more 40 MHz channels comprise 802.11 channels in a 2.4 GHz spectrum; and

wherein the one or more 40 MHz channels utilize frequencies normally occupied by at least two adjacent and non-interfering 802.11 20 MHz channels in a 2.4 GHz spectrum having a maximum of three 802.11 20 MHz non-interfering channels.

2. The method according to claim 1, wherein said selecting further comprises designating another access point as a secondary access point for the client.

3. The method according to claim 2, further comprising ceasing transmissions to the client from the secondary access point during the communication window.

4. The method according to claim 1, wherein said scanning an area via the client comprises utilizing a WLAN radio of the client.

5. The method according to claim 4, wherein the client is a laptop computer.

6. An apparatus comprising:

a processor;

an arrangement for scanning an area to determine if transmissions to the apparatus from a plurality of access points will interfere;

an arrangement for selecting one of the plurality of access points as a primary access point for the apparatus upon a determination by the apparatus that transmissions from the plurality of access points to the apparatus will interfere;

an arrangement for receiving at least one request, from the primary access point, for a communication window for the apparatus; and

an arrangement for establishing a communication window for the primary access point and the apparatus;

wherein the established communication window between the apparatus and the primary access point ensures transmissions from all other access points available to the apparatus cease, thereby preventing transmission of interfering signals;

wherein the transmissions to the apparatus from the plurality of access points comprise interfering transmissions on one or more 40 MHz channels;

wherein the one or more 40 MHz channels comprise 802.11 channels in a 2.4 GHz spectrum; and

wherein the one or more 40 MHz channels utilize frequencies normally occupied by at least two adjacent and non-interfering 802.11 20 MHz channels in a 2.4 GHz spectrum having a maximum of three 802.11 20 MHz non-interfering channels.

7. The apparatus according to claim 6, wherein said arrangement for selecting acts to designate another access point as a secondary access point for the client.

8. The apparatus according to claim 7, wherein said arrangement for establishing a communication window acts to cease transmissions to the client from the secondary access point.