Patent ID: 9231773
Filing Date: 2016-01-05
CPC Classification: H04L,H04M

Claim Text:
1. A method of handling time information in a communications system comprising: receiving a request message requesting a communication service at a proxy call session control function entity in a core network, the proxy call session control function entity being one of a plurality of proxy call session control function entities of the communications system that serve respective visited networks, the visited networks having respective time differences with respect to a core network time; including in the request message at the proxy call session control function entity a time zone offset between a local time and the core network time, the time zone offset being a time difference with respect to the core network time, expressed in plus or minus units of time, or zero, between the local time and the core network time; and providing the request message requesting the communication service including the time zone offset to a different network element in the core network to enable a time stamp to be generated in the core network adjusted to correspond to the local time.