US Patent No. 9,282,438

GROUP CALL MANAGEMENT


Patent No. 9,282,438
Issue Date March 08, 2016
Title Group Call Management
Inventorship Joerg Becker, Markdorf (GE)
Martin Sauter, Markdorf (GE)
Timothy Longman, Chester (GB)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 9,282,438

1. A method of setting up a call group for participation in a group call by a plurality of mobile devices in a mobile telecommunications
network, the mobile telecommunications network comprising;
a network node, not part of a Public Land Mobile Network (PLMN), operable to provide access to a group call service for the
plurality of mobile devices via a plurality of radio access nodes, wherein the network node is connected to a serving node
within the PLMN which is further connected to the plurality of radio access nodes, the method comprising:

receiving, at the network node, data indicative of a group identifier from a first mobile device registered with the mobile
telecommunications network, wherein the data is received from a first radio access node of the plurality of radio access nodes,
wherein the first radio access node has established a data communications channel with at least one mobile device of the plurality
of mobile devices, wherein, based on response received from the first mobile device at a first access node, the first radio
access node is defined as an active node and the data communications channel is maintained;

defining, by the network node, a Group Call Area using the received group identifier;
providing, by the network node, a serving node with access to the defined Group Call Area so as to enable the serving node
to discriminate one call group registered with said telecommunications network from another call group registered with said
telecommunications network;

identifying, by the network node, a second radio access node adjacent the first radio access node, wherein the second radio
access node is not part of the Group Call Area and wherein the second radio access node is not connected to any mobile device
participating in the group call; and

updating, by the network node, the Group Call Area on basis of the first and second radio access nodes, wherein the Group
Call Area is updated without receiving a response from the first mobile device via the second radio access node.