A packet-based video network includes: plural packetized video data nodes; a packet switch configured to switch from one of video packet routes to another of video packet routes; and a video synchronizer configured to synchronize the video frame periods of at least nodes acting as packetized video data sources; wherein: each node acting as a packetized video data source is configured to launch onto the network packetized video data such that, for at least video frame periods adjacent to a switching operation: the node launches onto the network packetized video data required for decoding that frame during a predetermined active video data portion of the video frame period, and the node does not launch onto the network packetized video data required for decoding that frame during a predetermined remaining portion of the video frame period; and the switching operation is implemented during the predetermined remaining portion.

A method of processing messages within a distributed computer system in order to compensate for latency effects within the distributed computer system, the distributed computer system comprising a plurality of user devices and a message processing device, the method comprising: receiving a message from a user device at a message management device; determining if the received message corresponds to a message type that requires compensation for latency delays; and, in the event that the message does not require compensation, forwarding the message to the message processing device; and, in the event that the message does require compensation for latency effects, calculating a randomised delay period, and holding the message at the message management device for the calculated delay period and subsequently forwarding the message to the message processing device.

One disclosure of the present specification provides a routing rule updating method for moving a specific IP flow to a specific access. The updating method can include a step of receiving a routing rule updating request message for network based IP flow mobility (NBIFOM) initiated by a network, wherein the routing rule updating request message can include: a routing rule for moving a specific IP flow of a user device from a first access to a second access; and a timer value calculated by the network. The timer value can be calculated by the network on the basis of at least one of subscriber information, load information and statistical information. The updating method can include the steps of: transmitting an acceptance message to the network in response to the routing rule updating request; and operating a timer according to the timer value.

The described technology is directed towards having multiple paths through streamed media content, such as a video. The content may be represented as a state machine of states, in which each state corresponds to one or more periods of one or more segments, and transitions to one or more other states. When a state is able to transition to different states, one or more criteria may be used to select one of the transition paths to a next state. Segments corresponding to unknown paths (where the transition decision is not yet available) may be selected and streamed for buffering via a multiple path buffering mechanism.

A method, performed in a network that includes a group of nodes, includes identifying a path through a set of the nodes, where each node, in the set of nodes, has a data plane and a control plane; establishing a control plane tunnel, associated with the path, within the control plane of the nodes in the set of nodes; establishing a data plane tunnel, associated with the path, within the data plane of the nodes in the set of nodes, where the data plane tunnel is associated with the control plane tunnel and established through the same set of nodes; and transmitting a control message through the control plane tunnel to change a state of the data plane tunnel.

Improved path management techniques for storage networks are described. In one embodiment, for example, an apparatus may comprise a processor circuit, a detection component for execution by the processor circuit to receive an advertisement of a set of paths for accessing a logical storage volume and determine whether the set of paths comprises an optimized path, and a modification component for execution by the processor circuit to, when the set of paths does not comprise an optimized path, send a first instruction to update a reporting nodes parameter for the logical storage volume to identify an owner node for the logical storage volume and a corresponding partner node. Other embodiments are described and claimed.

A bit error information transfer method, a network device, and a communications system are provided, so as to resolve a problem that an existing BFD mechanism cannot be applied to a layer 2 network and cannot be widely applied. In some feasible implementation manners of the application, the method includes: detecting, by a second network device, whether a bit error occurs on a first unidirectional link from a first network device to the second network device; when detecting that a bit error occurs on the first unidirectional link, generating an ISIS packet including bit error information, where the bit error information is used to indicate that the bit error occurs on the first unidirectional link; and sending the ISIS packet to the first network device.

There is provided an optical transmission control device includes a memory, and a processor coupled to the memory and the processor configured to aggregate information of candidacy sections having a possibility that communication is discontinued among wavelength-multiplexed transmission sections, classify, based on the aggregated information, optical paths set between optical transmission devices into a first optical path on which, when communication in the candidacy sections is discontinued, an optical signal is not transmitted, and a second optical path on which, when the communication in the candidacy sections is discontinued, an optical signal is transmitted, and determine a wavelength allocation in a first wavelength group of the first optical path and a second wavelength group of the second optical path so that a difference in gain wavelength characteristics of the first optical path and the second optical path is equal to or less than a predetermined level.

A system for server migration includes a first computer hosting a service during a first period of time. A second computer hosts the service during a second, third and fourth period of time. A client computer communicates directly with the service at a first IP address, during the first period of time. The client computer communicates with the service at the first IP address, during the second and third periods of time, through a tunneled connection via a first subflow of a multi-path communication session. The client computer communicates directly with the service at the second IP address, during the third period of time, via a second subflow of the multi-path communication session, and discontinue the first subflow of the multi-path communication session while maintaining the second subflow of the multi-path communication session during the fourth period of time.

A communication apparatus has a communication function that can concurrently perform first communication in which communication with a partner apparatus is performed via another apparatus that decides a wireless channel to be used in the wireless communication and second communication in which communication with the partner apparatus is performed not via another apparatus by the communication apparatus deciding the wireless channel. In a state in which the first communication and the second communication are concurrently performed, if a connection for the first communication is to be established while a connection for the second communication is established, a second wireless channel used for the second communication is set so as to match the second wireless channel with a first wireless channel to be used when the connection for the first communication is established.