Method and arrangement for activity detection in a telecommunication system

A radio base station in a communication system comprising a plurality of interconnected network nodes, said radio base station communicating with one or more user equipments, the radio base station comprising:

• a memory;
• and
• a processor being configured, when executing program instructions stored in the memory, for:
• storing a set of rules to independently initiate or perform a state transition to or from a reduced transmission activity mode when a predefined criterion has been fulfilled;
• detecting transmission activity on an uplink and a downlink;
• maintaining a plurality of timers, one for each user equipment and uplink and downlink transmission directions;
• storing of timer expiration values,
• indicating that a timer has expired, and
• restarting the timer of the user equipment if transmission activity has been detected to or from said user equipment;
• performing said state transition in accordance with one of said stored set of rules for a user equipment with an expired timer.

A user equipment in a communication system comprising a plurality of interconnected network nodes, said user equipment connected to one or more base stations, the user equipment comprising:

• a memory;
• and
• a processor being configured, when executing program instructions stored in the memory, for:
• storing a set of rules to independently initiate or perform a state transition to or from a reduced transmission activity mode when a predefined criterion has been fulfilled;
• detecting transmission activity on an uplink and a downlink;
• maintaining timers for each uplink and downlink transmission direction;
• storing of timer expiration values,
• indicating that a timer has expired, and
• restarting the timer if transmission activity has been detected to or from said user equipment;
• performing said state transition in accordance with one of said stored rules for the user equipment with an expired timer.