Alcatel Lucent

Nokia Solutions and Networks Oy

André Poulin

Kin-Yee Wong

Daniel Lafleur

Various embodiments relate to a method and apparatus for guaranteeing symmetrical delay in both directions for a Time-Division Multiplexing Pseudowire ('TDM-PW') service on a packet switching network ('PSN'), the method including the steps of using a transport method to specify a first path including a corresponding pair of unidirectional service tunnels for the TDM PW service between a master router and a slave router, detecting a failure on either of the corresponding pair of unidirectional service tunnels of the first path between the master router and the slave router, switching the master router and the slave router to a second path including a corresponding pair of unidirectional service tunnels, resetting a jitter buffer on the master router and the slave router and adjusting the jitter buffer to a halfway point, and transmitting and receiving data using the second path including the corresponding pair of unidirectional service tunnels.

Method and apparatus for providing resiliency for delay sensitive services

Apparatus and methods of recovering synchronization for multiple-link communications are disclosed. Streams of communication traffic on a plurality of communication links from which communication traffic is to be extracted and combined into a single communication traffic stream are monitored for receipt of synchronization information for each link. In the event that an error occurs in receipt of the synchronization information for any of the communication links, a stream received on each affected link is modified. For example, traffic may be removed from or inserted into a received stream where synchronization information for a link is received twice or received earlier than expected, respectively. If synchronization information for a link is missing, then it may be generated and inserted into the stream received on that link. In some embodiments, synchronization information includes sequence numbers, and inter-link synchronization is re-aligned to received sequence numbers when expected and received sequence numbers do not match.

Growing community of inventors

Gatineau, Canada

André Poulin