摘要:
Methods and devices for reducing traffic over a wireless link through the compression or suppression of high layer packets carrying predictable background data prior to transportation over a wireless link. The methods include intercepting application layer protocol packets carrying the predictable background data. In embodiments where the background data is periodic in nature, the high layer packets may be compressed into low-layer signaling indicators for communication over a low-layer control channel (e.g., an on off keying (OOK) channel). Alternatively, the high layer packets may be suppressed entirely (not transported over the wireless link) when a receiver side daemon is configured to autonomously replicate the periodic background nature according to a projected interval. In other embodiments, compression techniques may be used to reduce overhead attributable to non-periodic background data that is predictable in context.
摘要:
A link state network comprising a plurality of interconnected nodes, and a multiprotocol label switching (MPLS) tree established amongst at least some of the interconnected nodes, wherein the MPLS tree is associated with an MPLS label, and wherein the interconnected nodes are configured to deterministically forward a plurality of link state update (LSU) packets comprising the MPLS label over the MPLS tree.
摘要:
A network component comprising at least one processor configured to implement a method comprising transparently snooping a path control message comprising a first path identifier, wherein the path control message is sent between a plurality of routers and is not intended for the network component, analyzing a plurality of frames each comprising a second path identifier, and diverting at least some of the frames away from at least one of the routers, wherein the second path identifier in the diverted frames matches the first path identifier. Included is a method comprising configuring a bypass path by snooping a control frame comprising a label switched path (LSP) identifier, and routing a plurality of data frames associated with the LSP identifier to the bypass path without routing any subsequent control frames associated with the LSP identifier to the bypass path.
摘要:
An apparatus comprising a first edge node configured to populate a learned table using a first frame received from a remote node via a second edge node, wherein the learned table comprises a remote node address and a first forwarding address associated with the remote node address, and wherein the first forwarding address is for the second edge node, receive a second frame destined for the remote node, and determine that the second frame should be sent to the second edge node using the learned table, wherein the first edge node is further configured to replace the first forwarding address in the learned table with a second forwarding address when the second edge node fails, and wherein the second forwarding address is for a third edge node.
摘要:
A method and apparatus route data packets in communication network. A current routing topology of the network is analyzed and a digest value representing the current routing topology is determined. The digest value is encapsulated within the data packet. The data packet is forwarded according to the current routing topology.
摘要:
A network component comprising at least one processor configured to implement a method comprising transparently snooping a path control message comprising a first path identifier, wherein the path control message is sent between a plurality of routers and is not intended for the network component, analyzing a plurality of frames each comprising a second path identifier, and diverting at least some of the frames away from at least one of the routers, wherein the second path identifier in the diverted frames matches the first path identifier. Included is a method comprising configuring a bypass path by snooping a control frame comprising a label switched path (LSP) identifier, and routing a plurality of data frames associated with the LSP identifier to the bypass path without routing any subsequent control frames associated with the LSP identifier to the bypass path.
摘要:
Alternate multicast/broadcast paths may be calculated in a routed network to enable broadcast/multicast traffic to be transmitted around a local failure in the routed network until the routing system reconverges on a new network topography. According to an embodiment of the invention, the nodes on a multicast tree or a broadcast tree may compute alternate paths for each of the downstream nodes in the multicast/broadcast tree or for select nodes in the multicast/broadcast tree. The select nodes may be those nodes that have advertised membership in the multicast or a set number of hops downstream on the branch affected by the failure. The alternate paths may be unicast paths from the node to the other nodes on the multicast/broadcast tree. U-turn nodes may be used where there is no regular loop-free alternate network path to a node on the downstream multicast/broadcast tree.
摘要:
A network resource is allocated to a data path by determining if a sufficient amount of the network resource is available in a network path to accommodate the data path, and obtaining a cost associated with using the network resource available in the network path for the data path. It is decided whether to allocate the network resource in the network path to the data path based on the amount of the network resource and the cost associated with using the network resource. One representative example of the data path is a label switched path (LSP) on a multiprotocol label switching (MPLS) network.
摘要:
Link-based source routing may be implemented using generic framing protocol (GFP) to enable GFP frames to contain a switching context that will allow them to be forwarded on a network without requiring state information to be distributed to interior network elements on the network. Source routes may be computed from network topography information obtained using OSPF or ISIS. An extension header type is added to the GFP frames to signal to the network elements that the GFP frame contains a link-based source route. The source route contains a vector of tunnel IDs and a pointer to the current hop, to enable the current tunnel ID to be determined. The tunnel IDs have local significance only, and hence state information is not required to be distributed on the network. A return route may be built by index substitution as the frame traverses the network.
摘要:
An apparatus and method of forwarding a first message from a source to a destination via a link state routing network utilizes point-to-point feedback messages when the quality of a first path from the source to the destination meets some prescribed condition. To that end, the first path is initialized within the link state routing network. A feedback message having data relating to a quality of the first path then is received as a point-to-point message that is forwarded to the source. In response to receipt of the feedback message, a second path is initialized from the source to the destination. The first message then is forwarded to the destination via the second path.