Abstract: A process for the preparation of an ultra-high molecular weight ethylene homopolymer having a MFR21 of 0.01 g/10 min or less, said process comprising: (I) prepolymerising at least ethylene at a temperature of 0 to 90° C. in the presence of a heterogeneous Ziegler Natta catalyst to prepare an ethylene prepolymer having an Mw of 40,000 to 600,000 g/mol; and thereafter in the presence of the prepolymer and said catalyst; (II) polymerising ethylene at a temperature of 55° C. or less, such as 20 to 55° C., to prepare said UHMW ethylene homopolymer; wherein the UHMW ethylene homopolymer comprises up to 8 wt. % of said prepolymer.

Abstract: A method, network element, and communication system relates to at least two network elements, each having at least one endpoint for transmitting or receiving traffic information to or from another network element. At least one of the network elements includes at least one storage which stores information on the traffic-information-receiving availability of at least one endpoint of at least one other network element. The at least one storage stores IP addresses of the endpoints of the other network elements, and, associated with each IP address, the information on the traffic-information-receiving availability thereof. Each endpoint has an individual storage which is updated on a regular or irregular basis. The endpoints can be signalling units such as SIP-T/I endpoints. The communication can be based on Session Initiation Protocol, or SIP.