Solace Systems, Inc.

Alcatel Canada Inc.

Alcatel Lucent

Alcatel-lucent Canada Inc.

Alcatel Networks Corporation

Shawn P McAllister

Jonathan L Bosloy

Paul Kondrat

Andrew Dolganow

Carl Rajsic

Steven Buchko

Richard Chan

David W Horton

Duane Pauls

Joel Halpern

Mustapha Aissaoui

Nutan Behki

Shafiq Pirbhai

Neil Hart

David Pochopsky

Craig Betts

Greg Bertin

Peter Ashton

Scott W Brim

Steve Buchko

John Coffell

David Ker

Walter Prager

Scott Drennan

John Burns

Peter Roberts

Wayne Burwell

Charles Mitchell

John C Fischer

Mark Tooker

Martin Barnes

David Martin Harvey

James Stewart McCormick

Shay Nahum

Ron Veeneman

Peter Cameron Dippel

Paul Merlo

Ronald Andrew Jeffery

Mark Alexander Leith Smallwood

Mudashiru Busari

Christopher Whalen

Daniel Fossum

Peter Manson

Kenneth Barr

Erick Gonzalez

George Joseph Bertin

Ragnar Paulson

Tony Zoght

Jayanthi Venkatasubba

David Furshpan

Donald J Wells

Jules d'Entremont

James Moser

David George McKay

Ram Balakrishnan

Daniel Adamski

In a message delivery system, wherein messages are published by publishers and delivered to subscribers based on subscriptions relating to message content. A last message queue is associated with each publisher, and a last message from each publisher is stored in the message queue associated with that publisher based on an attribute of the publisher. In this way, it is not necessary to modify the content data within the message to create the last message queue.

Messaging delivery system with last message queue

A method of managing shared resources for controlling message flows in an assured message delivery system having a plurality of clients involves identifying different classes of clients based on their performance behaviors, and providing differentiated access to said shared resources between said different classes of clients.

Assured messaging system with differentiated real time traffic

In a message delivery system, messages are published by publishers and delivered to subscribers based on subscriptions relating to message content. Activation and de-activation notifications are supplied to applications that are bound to a queue in the message delivery system.

Message delivery system and method with queue notification

In a message delivery system, messages are carried over a network in packets. Server hosts support applications for originating and receiving messages and network interfaces. Switches interconnect the server hosts and form the packet network. Some of the switches are linked to the local server hosts. Distributed filtering/matching modules associated with the local server hosts register interests for applications on the associated local server hosts, inspect packets received over the network or from a local server host to match messages with registered interests and remove any unmatched packets from the packets. The matched messages are forwarded to the local server host for delivery to the applications. This system offers the ability to use special purpose hardware for the filtering/matching function without requiring connections to a common message broker.

Messaging system with distributed filtering modules which register interests, remove any messages that do not match the registered interest, and forward any matched messages for delivery

An assured message delivery system with resiliency receives messages from publishing client(s) and delivers them to subscribing clients. A primary system delivers the messages during normal operation. A secondary system mirroring the configuration of the primary system takes over responsibility for delivering the messages in the event of failure of the primary system. The secondary system is connected to the primary system over a communications link. The primary system sends copies of the messages to the secondary system over the communications link. The secondary system stores replicate messages and sends acknowledgement messages back to the primary system.

Replication in assured messaging system

A method of propagating multicast subscription and routing information between routers in a network, and constructing forwarding tables in the routers, allowing providers of the data (the publishers), and the multicast recipients of the data (the subscribers) to be decoupled from and have no knowledge of one another. This is done without the need to maintain (Source Network, Published-Multicast-Group) State in the routers, for a highly scalable solution in those applications where there is a possibility for a large, or infinite number of Published-Multicast-Groups, and in those applications where messages are being routed by content, so it is impossible to identify published-multicast-groups.

Subscription Management and Routing Protocol (SMRP) and Method

A method and apparatus for rerouting connections in a data communication network based on detection of faults or other undesirable characteristics using a user connection monitoring function is presented. After a connection is established that is managed by a control plane, the status of characteristics of the connection is monitored using a user connection monitoring function. In one embodiment, the user connection monitoring function includes the use of operation and management (OAM) cells. When the status of one or more of the selected characteristics being monitored is determined to be unacceptable, control plane rerouting of the connection is initiated. Selected characteristics that may be monitored using the user connection monitoring function include, for example, continuity, data corruption, data loss, latency, and misinsertion of data. The reroute initiated in response to the unacceptable characteristic may be a hard reroute or a soft reroute.

Method and apparatus for rerouting a connection in a data communication network based on a user connection monitoring function

In method of providing assured message delivery across a distributed message delivery system with low delivery latency and network traffic, a set of destinations is first identified for a set of destinations for a message received at an ingress router to the network. The received message is stored in persistent storage along with meta-data about each destination for the message before the message is routed to each identified destination. The message is only removed from persistent storage when an acknowledgement has been received from each destination indicating that the message has been successfully received.

Assured delivery message system and method

A networking appliance includes a chassis, an off-the-shelf motherboard mounted on said chassis, said motherboard including at least one expansion bus, one or more separately removable expansion module mounted on said chassis, and a number of card slots in the expansion module for accommodating expansion cards. A connection arrangement provides a signal connection between the card slots in the expansion modules and the expansion buses.

Serviceable networking appliance chassis

In source routed or hop-by-hop routed protocol communication networks, when congestion is detected at a certain network element, a notification message is sent to nodes. The nodes keep track of congestion condition and generally have knowledge of the congestion, thereby allowing them to make more intelligent routing decisions, i.e., rate controlling messages, routing traffic around congestion, regulating admission at the edge of the network. The intelligent routing decision is based on the congestion condition indicated by a restriction level which is periodically and dynamically updated.

Intelligent routing for effective utilization of network signaling resources

A method of performing connectivity verification in a content routed network including a plurality of routers and wherein messages are transported through the network over a message transport layer, involves sending from an originating router a ping request message over the message transport layer along a user data path to a terminating router using a content routing protocol. The terminating router responds with a ping reply message upon receipt of the ping request message, and the message transport layer is monitored for the ping reply message at the originating router. Trace messages can also be sent through the network to determine whether subscribers are reachable for messages originating from a particular publisher. Also trace messages can be sent through the network to determine whether subscriptions from a particular subscriber are reachable from a particular originating router.

Method and apparatus for operations, administration and maintenance of a network messaging layer

A method of managing a content routed network, involves distributing published documents through said network for delivery to subscribers; maintaining data logs pertaining to said published documents at different points in the network; and correlating the data logs to obtain information about the operation of the network.

Data logging in content routed networks

A method of providing a shared application infrastructure simultaneously to multiple independent virtual private networks with potentially overlapping IP addresses, involves connecting to an underlying layer 1, 2 or 3 virtual private network offering one or more virtual private networks, determining which virtual private network traffic is being received from or sent into, maintaining logically separate routing tables per VPN to allow overlapping addresses, and providing an application which provides a logical instance of the service to each VPN.

Shared application inter-working with virtual private networks

A method of providing router redundancy within a distributed network of routers, wherein messages are routed within the network based on virtual router identifiers, involves organizing the routers into one or more redundancy groups; assigning a physical identifier to each router in each of the redundancy groups; assigning one or more virtual identifiers to each redundancy group; selecting one of the routers of a particular redundancy group as a currently active router associated with a particular virtual identifier assigned to that redundancy group; advertising among the distributed network of routers for each redundancy group the physical identifier for the active router and information enabling other routers to determine the virtual identifier with which the currently active router is associated; and forwarding messages destined for a particular virtual router identifier to the currently active router based on the physical identifier of the currently active router.

Router redundancy in data communication networks

In a method of managing a content-based network, which is typically XML-based, and optionally may be overlaid on an underlying network having a plurality of network elements interconnected by links, a link state protocol maintains each network element's topological view of the overlay network from the underlying network. A subscription management protocol ensures dissemination of published content within the content-based network independently of the link state protocol.

Implicit routing in content based networks

Growing community of inventors

Manotick, Canada

Shawn P McAllister