Abstract: A multicast communication method for relaying a multicast packet from a first member node to a plurality of second member nodes in a wireless network is provided, wherein the first member node and the second member nodes belong to a same group and can communicate with each other via a plurality of non-member nodes. In the multicast communication method, a number and distances of the second member nodes are recorded. The multicast packet is received from the first member node, and a waiting time is determined according to the number and the distances of the second member nodes. Whether the multicast packet is broadcasted by any other relay node is monitored during the waiting time. If the multicast packet is already broadcasted to all the second member nodes by other relay node, the multicast packet is not broadcasted; otherwise, the multicast packet is broadcasted after the waiting time elapses.

Abstract: A method for searching communications addresses is used in a communications device having an address book recording a plurality of communications addresses of a contact unit. The method includes receiving a command for establishing communications corresponding to the contact unit, selecting a communications address fitting a predetermined rule from the plurality of communications addresses of the contact unit, and establishing communications using the selected communications address.

Abstract: A method for transferring a message from a first portable electronic device to a second portable electronic device through a server is disclosed. The method includes: utilizing the first portable electronic device to add a relay information to the message and then delivering the message to the server; utilizing the server to read the relay information from the message to determine a predetermined sending time for the message; and utilizing the server to send the message to the second portable electronic device at the predetermined sending time.

Abstract: A method for transferring a message from a first portable electronic device to a second portable electronic device through a server is disclosed. The method includes: utilizing the first portable electronic device to add a relay information to the message and then delivering the message to the server; utilizing the server to read the relay information from the message to determine a predetermined sending time for the message; and utilizing the server to send the message to the second portable electronic device at the predetermined sending time.