Patent ID: 9510166
Filing Date: 2016-11-29
CPC Classification: H04L,H04W

Claim Text:
1. A method of merging a first active Push to Talk (PTT) group call, in which a first group of PTT clients participate and a first group PTT server acts as a floor control arbitrator, with a second active PTT group call, in which a second group of PTT clients participate and a second group PTT server acts as a floor control arbitrator, the method comprising: receiving, at a first PTT server, a request to merge the first active group call and the second active group call into a merged PTT group call, wherein the first group of PTT clients and the second group of PTT clients participate in the merged PTT group call; sending, from the first PTT server to the first group PTT server, a first invite message, wherein the first invite message requests that the first active group call join the merged PTT group call and includes an indication that the first PTT server will be a floor control arbitrator for the merged PTT group call; receiving, in response to the first invite message, a first response message; sending, from the first PTT server to the second group PTT server, a second invite message, wherein the second invite message requests that the second active group call join the merged PTT group call and includes the indication that the first PTT server will be the floor control arbitrator for the merged PTT group call; receiving, in response to the second invite message, a second response message; and acting as the floor control arbitrator for the merged PTT group call.