249 results about "Resource Reservation Protocol" patented technology

A method and apparatus provide reserved bandwidth and QOS / COS virtual circuit connections in a network using both conventional and novel reservation protocols and frame formats. An apparatus according to the invention includes an enterprise control point that communicates with switches via a reserved signaling channel. The switches have been upgraded or replaced to include enhanced functionality. The enhanced switches detect packets that include requests for reserved connections according to existing reservation protocols such as RSVP and IEEE 802.1P / Q. Such detected packets are forwarded to the enterprise control point for processing via a reserved signaling channel. The enterprise control point identifies a path within the network that can satisfy the requested QOS / COS and reserves the requested resources all along the path from beginning to end. A method according to the invention includes detecting packets that include requests for reserved connections according to existing reservation protocols such as RSVP and IEEE 802.1P / Q, forwarding detected packets to an enterprise control point for processing via a reserved signaling channel, identifying a path within the network that can satisfy the requested QOS / COS and reserving the requested resources all along the path from beginning to end.

A distributed method of establishing a path in a multi-dimensional computer network comprising a plurality of nodes for transmitting isochronous data from a source node to a destination node is disclosed. A request packet is injected into the network, the request packet specifying a request to transmit the isochronous data from one of a plurality of source nodes. The request packet is routed to at least one the plurality of source nodes, and the source node determines whether it has sufficient resources to support transmitting the isochronous data. If the source node comprises sufficient resources to support transmitting the isochronous data, the source node reserves resources within the source node to support transmitting the isochronous data, and transmits an ack packet from the source node to a first neighboring node. The first neighboring node determines whether it has sufficient resources to support transmitting the isochronous data. If the first neighboring node comprises sufficient resources to support transmitting the isochronous data, the first neighboring node reserves resources within the first neighboring node to support transmitting the isochronous data, and transmits the ack packet to an adjacent node. If the first neighboring node does not comprise sufficient resources to support transmitting the isochronous data, the first neighboring node transmits a nack packet to the source node and the source node transmits the ack packet to a second neighboring node.

A network system comprising terminals and relaying nodes having a reservation message processing unit for transferring a packet wherein a packet receiving terminal 3 requests a reservation of network resources. The packet receiving terminal 3 transmits to a packet transmitting terminal 1 a request message in which a reservation request condition is stored in order to request a resource reservation, the packet transmitting terminal 1 having received the request message transmits to the relaying node 2 on the same route as the packet an acknowledgement message in which the reservation request condition is stored. Each relaying node 2 provides a resource reservation for the home relaying node according to the reservation request condition in the acknowledgement message and transfers the acknowledgement message to the same route as the packet. After the acknowledgement message has passed through all the relaying node 2, and when the packet receiving terminal has received the acknowledgement message, a network resource reservation procedure is completed.

The present invention provides a method for operating a network system and a network system operated correspondingly for improving network resource reservations and allocations. Information included in signaling messages of a given protocol, like the resource reservation protocol (RSVP), which do not provide information about the actual communications status in the network. According to the invention, information concerning the communications / service quality of the network are collected from all over the network. In particular, such information is collected from all network domains and their routers, respectively. The collected information is communicated in the network by extending the signaling messages obtained on the basis of the given protocol. Utilizing the collected information, service quality negotiations between a server and its client are improved. This improvement can be achieved for network systems comprising a network domain serving a single client, and multicasting networks. Furthermore, the present invention provides a solution for pre-reservation of network resources which avoids an unnecessary reservation of network resources and a waste of network resources for subsequent resource allocations.

Traffic is admitted to a network that facilitates differentiated end-to-end data transport between a Network Service Provider (NSP) and / or an Application Service Provider (ASP) and a customer Premises Network (CPN) that includes Customer Premises Equipment (CPE) by obtaining from a user of the network policy information associated with services accessed through the network. Communication is established between a node in the network and the NSP and / or the ASP and between the node in the network and the CPN using a resource reservation protocol (RSVP) to request resources for a flow having one of the services associated therewith between the NSP and / or the ASP and the CPN. A determination is made at the node in the network whether to grant or deny access to the RAN to the flow based on the policy associated with the one of the services.

Traffic is admitted to a network that facilitates differentiated end-to-end data transport between a Network Service Provider (NSP) and / or an Application Service Provider (ASP) and a customer Premises Network (CPN) that includes Customer Premises Equipment (CPE) by establishing communication between a node in the network and the NSP and / or the ASP and between the node in the network and the CPN using a resource reservation protocol (RSVP) to request resources for a flow between the NSP and / or the ASP and the CPN. A determination is made at the node in the RAN whether to grant or deny access to the RAN to the flow based on the network element resources available in the RAN and / or a policy associated with the NSP, ASP, and / or CPN.

An architecture and method for performing coarse-grain reservation of lightpaths within wavelength-division-multiplexed (WDM) based photonic burst switched (PBS) networks with variable time slot provisioning. The method employs a generalized multi-protocol label switched (GMPLS)-based PBS label that includes information identifying each lightpath segment in a selected lightpath route. A resource reservation request is passed between nodes during a forward traversal of the route, wherein each node is queried to determine whether it has transmission resources (i.e., a route lightpath segment) available during a future timeframe. Soft reservations are made for each lightpath segment that is available using information contained in a corresponding label. If all lightpath segments for a selected route are available, the soft reservations turn into hard reservations. The stored reservations enable quick routing of control burst that are employed for routing data during scheduled use of the lightpaths.

A technique avoids unnecessary preemption of resource reservations along a requested flow between nodes in a computer network. A node receives priority-based resource reservation requests and determines conditions of reservation eligibility by comparing the requested resources to the amount of available resources at the node. Specifically, the node maintains a “held resources” state where available requested resources are held prior to their being assigned or reserved (confirmed) for the requested flow, such as, e.g., during an initial Resource reSerVation Protocol (RSVP) Path message. The node includes the held resources in calculations of available resources in such a way as to prevent resources from being assigned or reserved if the resources would be subsequently preempted by a request of higher priority, or if an earlier request would first utilize the resources. The node (e.g., an end node) also prevents resources from being reserved or preempted in a duplex (bi-directional) reservation on a first flow in a first direction when resources available for a second flow in a second direction indicate a failure of the second flow.