Data transmission method in communication system, controller and communication terminal

A data transmission method in a communication system, the communication system comprising at least one controller, the method comprising:

• determining a data conveyance group stored in a database used by the at least one controller;
• activating downlink connections to data conveyance group members;
• identifying a data conveyance group member having data to be conveyed and activating an uplink connection for data conveyance;
• conveying the data of the data conveyance group member to other members of the data conveyance group by using the uplink and downlink connections;
• first deactivating the uplink connection after data conveyance;
• and
• second deactivating the downlink connections.

A data transmission method in a communication system, the communication system comprising at least one controller, the method comprising:

• specifying a data conveyance group stored in a database used by the at lease one controller;
• detecting a group member having data to be transmitted and establishing connections for conveying the data;
• conveying the data of the group member to other members of the data conveyance group by using the connections;
• and
• disbanding the connections after data conveyance.

A controller of a communication system, comprising:

• storing means for storing information on a data conveyance group;
• uplink and downlink connection means for data conveyance;
• activating means for activating the downlink connection means to data conveyance group members;
• identifying means for identifying a data conveyance group member having data to be conveyed;
• activating means for activating the uplink connection means for data conveyance;
• deactivating means for deactivating the uplink connection means;
• and
• deactivating means for deactivating the downlink connection means.

A controller of a communication system, comprising:

• storage means for storing information on a data conveyance group;
• connection means for conveying data;
• detection means for detecting a data conveyance group member having data to be transmitted;
• activating means for activating the connection means;
• and
• disbanding means for disbanding the connection means.

A controller of a communication system, configured to:

• store information on a data conveyance group;
• activate downlink connection means to data conveyance group members;
• identify a data conveyance group member having data to be conveyed;
• activate uplink connection means;
• convey the data of the data conveyance group member to other members by using the uplink and downlink connection means;
• and
• deactivate the uplink connection means and the downlink connection means.