Patent ID: 8693469

Claim:
A network node arrangement comprising: a server node adapted to handle control signaling for circuit switched calls and control connections between mobile stations over a radio network; and a gateway node adapted to handle user plane traffic under control of said server node, wherein said server node is adapted to, for a first and second call leg of a requested call between a first mobile station and a second mobile station, provide information to said gateway node about radio network node handling of said first call leg and said second call leg and channel or circuit information about channel or circuit resources for said first and second call legs, wherein said gateway node further comprises analyzing means comprising switching path optimization logic and being adapted to detect that for said requested call that said first and second mobile stations are handled by a common radio network node and triggering generation means adapted to provide an interconnection information message to said server node including information about said channel or circuit resources for said first and second call legs, said server node being adapted to forward said interconnection information message to said common radio network node such that said gateway node can used said interconnection information message to determine whether switching of said user plane traffic may be performed in said common radio network node.