COMMUNICATION DEVICE, METHOD FOR SCHEDULING A MESSAGE EXCHANGE AND COMPUTER PROGRAM PRODUCT

摘要

A Communication device is described comprising an allocation circuit configured to allocate a first presence information exchange time period for exchanging messages between a plurality of communication devices of a group of communication devices for determining which communication devices are part of the group of communication devices; and a determining circuit configured to determine, based on the number of other communication devices in the group of communication devices, a starting time of a second presence information exchange time period for exchanging messages between a plurality of the communication devices of the group of communication devices for determining which communication devices are part of the group of communication devices; wherein the allocation circuit is further configured to allocate the second presence information exchange time period, such that the second presence information exchange time period starts at the determined starting time.