Abstract: Embodiments described herein relate to methods and apparatuses for selecting a first virtualisation engine to execute an application deployment request. A method in a selection engine (104, 700) comprises receiving (300) an application deployment request (101) comprising an identification of an application image (102); selecting (306) the first virtualisation engine from a plurality of virtualisation engines based on a plurality of respective values of at least one characteristic associated with execution of the application image by each of the plurality of virtualisation engines; and initiating (308) execution of the application image by the first virtualisation engine.

Abstract: Fail-over protection is provided for a server cluster including a plurality of primary nodes supporting user sessions and a standby node. When the standby node determines that a primary node in a cluster has failed, the standby node configures its network interface to use an Internet Protocol (IP) address of the failed primary node. The standby node further retrieves session data for user sessions supported by the failed primary node from a low latency database for the cluster and restores the user sessions at the standby node. When the user sessions are restored, the standby node switches from a standby mode to an active mode.

Abstract: Certain embodiments relate to a method for assigning, by a resource orchestration entity, resources for a service carried out on a data packet flow in a multilayer network, the method comprising determining software requirements and network requirements necessary for the service wherein the software requirements and network requirements are received by the network resource orchestration entity from an upper layer through a northbound interface; determining a virtual network topology of the network with at least one virtual network entity, the virtual network entity comprising entity computing resources and entity network resources; and assigning the software requirements and the network requirements at least partially to the entity computing resources and the entity network resources.

Abstract: According to one aspect of the present disclosure, a method of operating a network node of a communication network is provided, the network node being connected to a downstream network node, and to a non-downstream loop free alternate (LFA) network node comprising a load balancing identifier indicating whether it is allowed to load balance the data packet via a non-downstream LFA network node or not; changing, if the load balancing identifier indicates that it is allowed to load balance the data packet via a non-downstream LFA network node, and if the network node decides to load balance the data packet via the non-downstream LFA network node, the load balancing identifier of the data packet such that it indicates that a further load balancing of the data packet via a further non-downstream LFA network node is not allowed; and forwarding the thus modified data packet to the non-downstream LFA network node.

Abstract: Certain embodiments relate to a method for assigning, by a resource orchestration entity, resources for a service carried out on a data packet flow in a multilayer network, the method comprising determining software requirements and network requirements necessary for the service wherein the software requirements and network requirements are received by the network resource orchestration entity from an upper layer through a northbound interface; determining a virtual network topology of the network with at least one virtual network entity, the virtual network entity comprising entity computing resources and entity network resources; and assigning the software requirements and the network requirements at least partially to the entity computing resources and the entity network resources.

Abstract: A method for adapting the data traffic of a communication between a user equipment and a communication network. The user equipment includes an entity for providing a service associated to the communication. The method includes determining actual operational status information of the service providing entity and creating an usage indicator based on said operational status information. Further the method includes the steps of sending the usage indicator to the communication network and adapting the data traffic of the communication in accordance with the usage indicator. A related user equipment provides the usage indicator to the communication network. A related traffic controller of a communication network adapts the data traffic of a communication between the user equipment and the communication network.

Abstract: A method performed by a network node. The method includes detecting a loss of connection at an incoming interface to an upstream neighbor of the network node, where the network node is in a multicast communication network that includes a multicast tree to provide connectivity from a common source node to one or more multicast recipient nodes. The multicast communication network further includes a set of one or more secondary paths to provide redundancy to the multicast tree, and sending a notification packet downstream toward the one or more multicast recipient nodes when the network node cannot re-route the multicast data traffic to allow the multicast data traffic to be received by the multicast recipient nodes, wherein the notification packet causes one or more downstream nodes to switch multicast reception to one or more of the set of one or more secondary paths to re-route the multicast data traffic.

Abstract: A Path Computation Client (24) of a node in a network sends a request message (52) to a Path Computation Element (28) of the network for computation of a path, and the Path Computation Element sends a response message (54) comprising information identifying a calculated path. The Path Computation Element also sends a request for feedback on a result of the attempt to set up the connection. The Path Computation Element attempts to set up a connection based on the calculated path, and reports (64) to the Path Computation Element the result of the attempt to set up the connection.

Abstract: A method, a mobility node 211 and a new mobility anchor 214b configured to operatively relocate the mobility anchor 214a for a mobile terminal 215a in a wireless communication system 200. The relocation is achieved by a request for redirecting an old bearer B-old configured to communicate user-data between the mobile terminal 215a and an old mobility anchor 214a, and by setting up a new standby bearer B-new configured to operatively communicate user-data between the Mobile Terminal 215a and the new mobility anchor 214b. The standby bearer B-old is ready to be activated once the old bearer B-old is deleted.

Abstract: A computing device or control plane device functioning as or implementing the functions of a network node in a multicast communication network. The multicast communication network includes a multicast tree to provide connectivity from a common source node to one or more multicast recipient nodes. The multicast communication network further includes a set of secondary paths to provide redundancy to the multicast tree. The computing device executes a plurality of virtual machines for implementing network function virtualization (NFV), wherein a virtual machine from the plurality of virtual machines is configured to implement a method for an enhanced fast re-route mechanism to provide increased failure coverage to the multicast communication network.

Abstract: A technique for informing nodes in a communications network about changes in a state of the communications network using notification packets is described. In that technique, the communications network is reconfigured using a fast reroute protocol responsive to the state change. A method aspect of the technique comprises generating, upon a network state change, a notification packet. Generating the notification packet includes adding a unique identifier to the notification packet. The method further includes propagating the notification packet through the communications network.

Abstract: The invention refers to operating a first node of a communication network comprising a plurality of nodes which are interconnected by communication links and wherein data traffic is provided over the communication links to provide a data stream to the nodes, wherein the first node (15) performs the steps of: detecting a data traffic interruption with respect to a second node (16), determining, if the data traffic is still received, and forwarding the data traffic to the second node (16) if the first node (15) receives the data traffic, and otherwise notifying a third node (17) of the plurality of network nodes about the data traffic interruption. The invention further refers to a corresponding node, a network and a computer program to be run in the node.

Abstract: Disclosed herein is a method, a serving node and a mobility node for relocating the mobility anchor for a mobile terminal 215a in a wireless communication system 200. The relocation comprises a request for redirecting a first bearer B-old for the mobile terminal 215a between the serving node 212b and a first mobility anchor 214a so as to create a new substantially identical second bearer B-new between the serving node 212b and a second mobility anchor 214b. In addition, the relocation comprises a transmission of a request to the first mobility anchor 214a for deleting the first bearer B-old and a transmission of a request to the second mobility anchor 214b for establishing the second bearer B-new.

Abstract: There is described a method and apparatus for sending data through one or more packet data networks. A stripped-down packet is sent from a packet sending node towards a cache node, the stripped down packet including in its payload a pointer to a payload data segment stored in a file at the cache node. When the stripped-down packet is received at the cache node, the pointer is used to identify the payload data segment from data stored at the cache node. The payload data segment is inserted into the stripped-down packet in place of the pointer so as to generate a full size packet, which is sent from the cache node towards a client.

Abstract: A method forward Ethernet frames at a node in a network supporting an implementation of shortest path bridging (SPB) protocol is disclosed. The method starts with a shortest path computation for the node (referred to as the computing node). The shortest path computation selects at least a shortest path to each destination node in the network, where a neighboring node on the shortest path to reach each node is recorded. Then it computes a downstream loop-free alternate (LFA) node for a destination node, where the LFA node is downstream of the computing node but not on the selected shortest path to the destination node from the computing node. Then when connectivity to the neighboring node on the computed shortest path is detected to be abnormal, the node forwards an Ethernet frame with a destination media access control (MAC) address corresponding to the destination node through the LFA node.

Abstract: A method is implemented by a network element or controller for determining a backup path for a fast reroute process to be utilized in response to a network event invalidating a primary path to a destination node. The method identifies at least one intermediate node that has a backup loop free alternative (LFA) path to a destination node in a network where no path meeting LFA conditions can be found for a point of local repair (PLR).

Abstract: The present disclosure relates to preparation of nodes in a packet-switched communication network for enabling packet rerouting upon a failure in the network. The rerouting occurs along a detour defined by a Multiple Redundant Tree (MRT). A method aspect of this disclosure comprises computing, by a node of a set of connected nodes, at least one first MRT pair for a first MRT area to which a node is assigned. The first MRT area comprises a first subset of connected nodes. The method further comprises computing, by the node, at least one second MRT pair for a second MRT area to which the node is assigned. The second MRT comprises a second subset of the connected nodes.

Abstract: A technique of operating a network node of a multicast communication network comprising a plurality of network nodes which are interconnected with each other by communication links is provided, wherein the network node is associate with a common source network node. A method implementation of the technique comprises: determining a first path which connects the network node to the common source network node along a primary network tree, and determining a second path which connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other; receiving, at the network node, multicast data from the common source network node via the first path; triggering, by the network node, reception of multicast data from the common source network node via the second path if the network node detects a failure of the first path (e.g., determines that no multicast data is received via the first path).

Abstract: According to one example embodiment, a method is implemented by a network node to verify that a switching network has converged to a stable routing state. The network node receives a network state digest from each of a plurality of switching nodes in the switching network. Each network state digest is indicative of a topology of the switching network as perceived by a given switching node. The network node determines that the switching network has converged to a stable routing state based on a comparison of the received network state digests. In one or more embodiments the network node is a switching node of the switching network.

Abstract: According to one example embodiment, a network node initiates a desired configuration of a switching network by sending a link state message containing a configuration descriptor specifying the desired configuration and a predetermined type value. The configuration descriptor may describe an explicit path for routing data traffic through the switching network. The explicit path may comprise strict hops or a combination of strict hops and loose hops. The configuration message is propagated through the network by flooding. Each network node receiving the configuration message is instructed to take appropriate action to implement the specified configuration and send a result report indicating a result of the configuration action. The result report may be included in a link state message and propagated by flooding so that all network nodes are able to determine whether the configuration was successfully completed based upon the result reports send from the network nodes.