公开(公告)号：AU2003295466C1

公开(公告)日：2010-01-07

申请号：AU2003295466

申请日：2003-11-13

Applicant: CISCO TECH INC

Inventor： REBO RICHARD D ,  SMTIH DOUGLAS A ,  GRISWOLD VICTOR J ,  MEIER ROBERT ,  WINGET NANCY CAM

IPC: H04L12/28 ,  H04L29/06 ,  H04W12/06 ,  H04W36/00

Abstract: A method and system for handling roaming mobile nodes in a wireless network. The system uses a Subnet Context Manager to store current Network session keys, security policy and duration of the session (e.g. session timeout) for mobile nodes, which is established when the mobile node is initially authenticated. Pairwise transit keys are derived from the network session key. The Subnet Context Manager handles subsequent reassociation requests. When a mobile node roams to a new access point, the access point obtains the network session key from the Subnet Context Manager and validates the mobile node by computing a new pairwise transient key from the network session key.

公开(公告)号：DE602004022853D1

公开(公告)日：2009-10-08

申请号：DE602004022853

申请日：2004-08-31

Applicant: CISCO TECH INC

Inventor： GRISWOLD VICTOR J ,  MEIER ROBERT C

IPC: H04W4/06 ,  H04J99/00 ,  H04L12/12 ,  H04L12/18 ,  H04L12/28 ,  H04L12/56 ,  H04W4/00 ,  H04W24/00 ,  H04W24/02 ,  H04W60/00 ,  H04W84/12 ,  H04W88/08

Abstract: A method for providing a superior quality of service for multicast data streams delivered over a wireless local area network. As Internet Protocol multicast data streams are received by an access point, the access point observes Internet Group Multicast Protocol registration messages to determine which of its associated stations subscribe to each multicast data stream. The access point then determines which of the multicast data streams it receives have only active subscribing stations as opposed to those data streams having at least one associated station operating in power-save mode. The access point will automatically transmit each multicast data stream having only active subscribers immediately to the associated active stations, while buffering the multicast data stream for which there is at least one associated station operating in power-save mode.

公开(公告)号：AU2005229612B2

公开(公告)日：2009-05-21

申请号：AU2005229612

申请日：2005-01-18

Applicant: CISCO TECH INC

Inventor： GRISWOLD VICTOR J

IPC: H04L12/18 ,  H04L12/28 ,  H04L12/46 ,  H04L12/56

Abstract: A method for an access point to provide immediate delivery of low-latency data packets to one virtual local area network when there are one or more associated stations operating in Power-Save-Protocol on another virtual local area network. The access point observes all the virtual local area networks to which it provides access to associated stations. The access point then determines which of the virtual local area networks contains only active stations. The access point then tracks the virtual local area network having only active stations and immediately transmits to the network incoming multicast/broadcast data packets.

公开(公告)号：AT381842T

公开(公告)日：2008-01-15

申请号：AT03786656

申请日：2003-11-13

Applicant: CISCO TECH INC

Inventor： MEIER ROBERT ,  REBO RICHARD D ,  GRISWOLD VICTOR J ,  SMTIH DOUGLAS A ,  CAM WINGET NANCY

IPC: H04L29/06 ,  H04L12/28 ,  H04W12/06 ,  H04W36/00

Abstract: A method and system for handling roaming mobile nodes in a wireless network. The system uses a Subnet Context Manager to store current Network session keys, security policy and duration of the session (e.g. session timeout) for mobile nodes, which is established when the mobile node is initially authenticated. Pairwise transit keys are derived from the network session key. The Subnet Context Manager handles subsequent reassociation requests. When a mobile node roams to a new access point, the access point obtains the network session key from the Subnet Context Manager and validates the mobile node by computing a new pairwise transient key from the network session key.

公开(公告)号：CA2507119C

公开(公告)日：2015-10-06

申请号：CA2507119

申请日：2003-11-13

Applicant: CISCO TECH INC

Inventor： MEIER ROBERT ,  REBO RICHARD D ,  GRISWOLD VICTOR J ,  CAM WINGET NANCY ,  SMITH DOUGLAS A

IPC: H04W12/06 ,  H04L9/14 ,  H04L9/32 ,  H04L12/28 ,  H04L12/66 ,  H04L29/06 ,  H04W36/00 ,  H04W76/02

Abstract: A method and system for handling roaming mobile nodes in a wireless network. The system uses a Subnet Context Manager to store current Network session keys, security policy and duration of the session (e.g. session timeout) for mobile nodes, which is established when the mobile node is initially authenticated. Pairwise transit keys are derived from the network session key. The Subnet Context Manager handles subsequent reassociation requests. When a mobile node roams to a new access point, the access point obtains the network session key from the Subnet Context Manager and validates the mobile node by computing a new pairwise transient key from the network session key.

公开(公告)号：CA2558459C

公开(公告)日：2010-12-07

申请号：CA2558459

申请日：2005-01-18

Applicant: CISCO TECH INC

Inventor： GRISWOLD VICTOR J

IPC: H04L12/46 ,  H04L12/18 ,  H04L12/28 ,  H04L12/56

Abstract: A method a system and a computer program for an access point to provide immediate delivery of low-latency data packets to one virtual local area network when there are one or more associated stations operating in Power-Save-Protocol on another virtual local area network. The access point observes all the virtual local area networks to which it provides access to associated stations. The access point then determines which of the virtual local area networks contains only active stations. The access point then tracks the virtual local area network having only active stations and immediately transmits to the network incoming multicast/broadcast data packets. Quality of packet data transmissions is improved, in particular, low-latency transmissions (i.e. VOIP transmissions and transmissions for stations in constantly active mode), since the packets for said transmissions are not buffered at the access point, but delivered immediately after reception, whereas packet for otheer transmissions (i.e. for station in Power save mode) are first stored and then delivered when requested by the corresponding stations. In particular, the method, computer program and system is implemented for low latency multicast/broadcast data packets being the destinations certain stations in different VLANS.

公开(公告)号：CA2543240C

公开(公告)日：2010-10-12

申请号：CA2543240

申请日：2004-08-31

Applicant: CISCO TECH INC

Inventor： GRISWOLD VICTOR J ,  MEIER ROBERT C

IPC: H04L12/56 ,  H04J99/00 ,  H04L12/12 ,  H04L12/18 ,  H04L12/28 ,  H04W4/00 ,  H04W24/00 ,  H04W24/02 ,  H04W60/00 ,  H04W84/12 ,  H04W88/08

Abstract: A method for providing a superior quality of service for multicast data streams delivered over a wireless local area network. As Internet Protocol multicast data streams are received by an access point, the access point observes Internet Group Multicast Protocol registration messages to determine which of its associated stations subscribe to each multicast data stream. The access point then determines which of the multicast data streams it receives have only active subscribing stations as opposed to those data streams having at least one associated station operating in power-save mode. The access point will automatically transmit each multicast data stream having only active subscribers immediately to the associated active stations, while buffering the multicast data stream for which there is at least one associated station operating in power-save mode.

公开(公告)号：AU2004297927B2

公开(公告)日：2009-12-03

申请号：AU2004297927

申请日：2004-08-31

Applicant: CISCO TECH INC

Inventor： GRISWOLD VICTOR J ,  MEIER ROBERT C

IPC: H04L12/12 ,  H04J99/00 ,  H04L12/18 ,  H04L12/28 ,  H04L12/56 ,  H04W4/00 ,  H04W24/00 ,  H04W24/02 ,  H04W60/00 ,  H04W84/12 ,  H04W88/08

Abstract: A method for providing a superior quality of service for multicast data streams delivered over a wireless local area network. As Internet Protocol multicast data streams are received by an access point, the access point observes Internet Group Multicast Protocol registration messages to determine which of its associated stations subscribe to each multicast data stream. The access point then determines which of the multicast data streams it receives have only active subscribing stations as opposed to those data streams having at least one associated station operating in power-save mode. The access point will automatically transmit each multicast data stream having only active subscribers immediately to the associated active stations, while buffering the multicast data stream for which there is at least one associated station operating in power-save mode.

公开(公告)号：DE60328124D1

公开(公告)日：2009-08-06

申请号：DE60328124

申请日：2003-11-13

Applicant: CISCO TECH INC

Inventor： REBO RICHARD D ,  GRISWOLD VICTOR J

IPC: H04L29/06 ,  H04L12/28 ,  H04W12/08 ,  H04W88/08

Abstract: A method wherein an access point authenticates itself with neighboring access points and establishes secure and mutually authenticated communication channels with its neighboring access points. When an access point learns of a neighboring access point, it initiates an authentication with an authentication server through the neighboring access point. Once access points have mutually authenticated each other, whenever a station authenticates itself with a first access point, the first access point communicates the station's authentication context information, for example session key and session identifier, to each neighboring access point. Thus, when the station roams to a neighboring access point, the neighboring access point presents the station with a reauthentication protocol, for example LEAP reauthentication, and if the reauthentication is successful, communication between the station and the neighboring access point takes place immediately and no new EAP authentication needs to occur.