Optimized broadcasting of system information messages

A wireless device configured for assessing system information perception capability in a wireless network that is arranged to broadcast system information on at least two frequency carriers, the wireless device comprising:

• a radio communication interface configured to communicate with a network node and processing circuitry configured to cause the wireless device to
• receive broadcasted system information on the at least two frequency carriers;
• determine, using the received broadcasted system information, frequency carrier identity correlated information for each of the at least two frequency carriers, wherein the frequency carrier identity correlation information is an area-unique identity for the respective carrier or information from which an area-unique identify for the respective carrier can be determined;
• report receipt of the broadcasted system information on the at least two frequency carriers, wherein the report includes the frequency carrier identity correlated information;
• and
• broadcast a system information time stamp in a random access message to a network node thereby enabling the network node to compare the system information time stamp with a predetermined system information reading interval and to inform a network control node when the system information time stamp indicates that the predetermined system information reading interval is exceeded,
• wherein the system information time stamp represents the time when the wireless device most recently received system information.

A method performed in a network node of broadcasting system information in a wireless network, the method comprising:

• broadcasting system information on one or more frequency carriers;
• receiving, from one or more wireless devices, information on wireless device perception capability;
• wherein the wireless device perception capability represents the capability of the wireless device to receive the system information broadcasted from the network node;
• receiving a system information time stamp in a random access message from a wireless device;
• comparing the system information time stamp with a predetermined system information reading interval;
• informing a network control node when the system information time stamp indicates that the predetermined system information reading interval is exceeded;
• sending at least one report on wireless device perception capability to the network control node;
• and
• enabling or disabling broadcasting of system information on at least one frequency carrier based on instructions received from the network control node.

A network node configured to broadcast system information in a wireless network, the network node comprising:

• a network communication interface configured for communication with network nodes,
• a radio communication interface configured for communication with a wireless device and processing circuitry configured to cause the network node to
• broadcast system information on one or more frequency carriers;
• receive, from one or more wireless devices, information on wireless device perception capability;
• wherein the wireless device perception capability represents the capability of the wireless device to receive the system information broadcasted from the network node;
• receive a system information time stamp in a random access message from a wireless device;
• compare the system information time stamp with a predetermined system information reading interval;
• inform a network control node when the system information time stamp indicates that the predetermined system information reading interval is exceeded;
• send at least one report on wireless device perception capability to ft the network control node;
• and
• enable or disable broadcasting of system information on at least one frequency carrier based on instructions received from the network control node.