Patent ID: 9112962
Filing Date: 2015-08-18
Classification: H04L,H04M,H04W

Abstract:
1. A method in a node of a telecommunication system, the method comprising the steps of: receiving a call establishment request between a first mobile user equipment and a second mobile user equipment, where the second user equipment's international mobile equipment identity (IMEI) or international mobile subscriber identity (IMSI) is not known: determining that the first user equipment is subscribed to a service that allows the first user equipment to know the IMEI or the IMSI of the second user equipment; acquiring the IMEI or the IMSI of the second user equipment, including the step of sending a request for the IMEI or the IMSI of the second user equipment from the node to a second node using an initial address message (IAM) of an ISDN user part (ISUP) protocol, and receiving the IMEI or the IMSI of the second user equipment from the second node using an answer message (ANM) or a connect message (CON) of the ISDN user part (ISUP) protocol; and providing the IMEI or the IMSI of the second user equipment to the first user equipment, wherein the step of acquiring the identity or the step of providing the identity is performed either automatically or selectively in response to the first user equipment being subscribed to the service that allows the first user equipment to know the identity of the second user equipment.