Patent application number | Description | Published |
20110044202 | Network Node and Method of Operating a Network Node - Network node comprising input equipment, switching equipment and output equipment, the input equipment is arranged to be capable of packetising time division multiplexed (TDM) traffic flows, the switching equipment is arranged to be capable of routing the packetised data from the input equipment to the output equipment, and the output equipment is arranged to be capable of reassembling the flows into time division multiplexed format, wherein the input equipment is also arranged to be capable of causing the data frequency of the packetized data sent to the switching equipment to be substantially equal to a predetermined data frequency. | 02-24-2011 |
20130004164 | Optical Trasnsport Network Alarms - An optical transport network signal (OTM) comprising at least one optical channel is received at a first network equipment. The optical transport network signal (OTM) is processed to extract optical data units (ODUk) for each optical channel (OCh). There is detection for defects during the processing. The optical data units are retransmitted within optical transport units (OTUk) towards a second network equipment. When a defect has been detected, the retransmitting comprises inserting an optical channel transport unit alarm indication signal (OTUk-AIS) in an optical channel transport unit (OTUk) containing optical channel data units (ODUk) that are affected by the detected defect. The second network equipment detects for the presence of the optical channel transport unit alarm indication signal (OTUk-AIS) and generation of an alarm is inhibited for any optical channel data units (ODUk) contained within the optical channel transport unit that comprises the optical channel transport unit alarm indication signal (OTUk-AIS). The network equipments can comprise a WDM or DWDM equipment and a cross-connect. | 01-03-2013 |
20130039220 | CONFIGURATION OF SYNCHRONISATION NETWORK HAVING SYNCHRONIZATION TRAILS FOR TIME SYNC AND FREQUENCY SYNC - Configuring a node ( | 02-14-2013 |
20130101292 | RESIZING EXISTING TRAFFIC FLOW IN OPTICAL TRANSPORT NETWORK - In an optical transport network a traffic flow comprises data grouped into a number of resizable data units, encapsulated by optical transport frames, each having a frame overhead. A rate of the traffic flow is changed by changing the data unit overhead and changing at the source node the frame overhead to indicate a change in rate of an optical signal carrying the traffic flow. An optical transmission part is tuned to transmit at the new rate, and at any intermediate nodes along the route the indication of the change in rate is detected in the frame overhead so that the traffic flow on a next optical link is transmitted at the new rate. Thus optical bandwidth allowed for enlarging the data units, can be saved, and electrical processing of data units at the nodes can be simplified, reducing power consumption. | 04-25-2013 |
20130107894 | METHOD AND APPARATUS FOR FORMING AND PROCESSING DATA UNITS | 05-02-2013 |
20130315606 | DISTRIBUTING CLOCK SYNCHRONIZATION INFORMATION WITHIN AN OPTICAL COMMUNICATIONS NETWORK - A method and system of distributing clock synchronization information within an optical communications network including a plurality of network elements, in which a first network element receives an ingress clock synchronization message, the ingress clock synchronization message including a clock synchronisation message identifier and a correction field. The first network element inserts the clock synchronisation message identifier into an optical channel frame overhead and inserts the ingress clock synchronisation message into an optical channel frame payload. The first network element transmits the optical channel frame overhead and the optical channel frame payload to a second network element, and determines a transit time of the clock synchronisation message identifier across each of the network elements. The second network element updates the correction field of the ingress clock synchronisation message with said transit times to form an egress clock synchronisation message. | 11-28-2013 |
20140016925 | RESIZING A PATH IN A CONNECTION-ORIENTED NETWORK - An existing path in a connection-oriented network requires resizing from a first size to a second size. Nodes exchange control plane signalling with other nodes which advertises available resources on links between nodes. A node on the existing path receives a request to establish a path capable of being resized to the second size. The node determines, using information acquired by the control plane signalling with other nodes, a new path between nodes capable of supporting the second size. The node signals to establish the new path and switches traffic from the existing path to the new path. The node causes the new path to be resized to the second size. Nodes exchange control plane signalling with other nodes which advertises whether a link supports resizing, such as OSPF-TE advertisements. | 01-16-2014 |
20140193146 | Apparatus and Method For Optical Transport Networks - An optical transport network comprises a first node and a second node adapted to communicate one or more lower order optical channel data unit (LO-ODU) traffic signals via a higher order optical channel data unit (HO-ODU) traffic signal. An adaptation function between a lower order optical channel data unit traffic signal and a higher order optical channel data unit traffic signal is modified to enable protocol information for bidirectional protection switching to be conveyed in one or more lower order optical channel data unit traffic signals that are conveyed between the first node and the second node using the higher order optical channel data unit traffic signal. This enables the protocol information to be used at a higher order optical channel data unit entity to perform bidirectional protection switching. | 07-10-2014 |