Wireless communication device, radio access network node, methods, and computer programs for power efficient paging escalation

A method of a wireless communication device which is arranged to operate in a cellular communication system, the method comprising:

• receiving radio signals from a radio access network node of the cellular communication system;
• and
• detecting a first signal and a second signal among the signals received from the access network node of the cellular communication system, the first signal comprising a network synchronisation signal comprising information about synchronisation and an identification of a cell associated with the access network node, and the second signal comprising a notification, the notification including a wake-up signal indicating that a paging signal should be read from the received signals;
• and
• the detecting of the notification comprising one of:
• detecting the notification at a first timing when the received identification of the cell is equal to a previous reception of an identification of a cell at a last mutual interaction between the wireless communication device and the cellular communication system;
• and
• detecting the notification at a second timing when the received identification of the cell differs from the previous reception of the identification of the cell at the last mutual interaction between the wireless communication device and the cellular communication system.

A radio access network node arranged to operate in a cellular communication system, the radio access network node comprising:

• an interface towards the cellular communication system;
• a transceiver configured to interact by radio signals, comprising a first signal and a second signal to be transmitted, with one or more wireless communication devices, the first signal comprising a network synchronisation signal comprising information about synchronisation and an identification of a cell associated with the radio access network nod and the second signal comprising a notification, the notification including a wake-up signal indicating that a paging signal should be read from the transmitted signals;
• and
• a controller configured to:
• determine, from a paging message for a wireless device received over the interface, a last identification of a cell to which the wireless device had a last mutual interaction between the wireless communication device and the cellular communication system;
• and
• form the notification to one of:
• have a first timing when the determined identification of the cell is equal to an identification of a cell operated by the radio access network node;
• and
• have a second timing when the determined identification of the cell differs from the identification of the cell operated by the radio access network node.

A method of a radio access network node which is arranged to operate in a cellular communication system, the method comprising:

• receiving a paging message for a wireless device from another node of the cellular communication system;
• determining, from the paging message a last identification of a cell to which the wireless device had a last mutual interaction between the wireless communication device and the cellular communication system;
• transmitting a first signal and a second signal, the first signal comprising a network synchronisation signal comprising information about synchronisation and an identification of a cell associated with the radio access network node, and the second signal comprising a notification, the notification including a wake-up signal indicating that a paging signal should be read from the transmitted signals;
• and
• the notification has one of:
• a first timing when the determined identification of the cell is equal to an identification of a cell operated by the radio access network node;
• and
• a second timing when the determined identification of the cell differs from the identification of the cell operated by the radio access network node.