Terminal Device Connection Recovery via Network Node Information

The terminal device pre-acquires and stores network node information (such as identifier of the network node, paging region identifier, or access network device identifier) before connection recovery is needed. This preliminary action ensures that when the terminal device sends a connection recovery request to any access network device in the paging region, the access network device can immediately use the pre-provided network node information to acquire the context configuration information from the network node, thus resolving the contradiction between connection recovery flexibility and information availability.

The patent introduces a network node as an intermediary between the access network device and the context configuration information. Instead of requiring each access network device to store context configuration information of all terminal devices, the access network device can use the network node information provided by the terminal device to acquire the required context configuration information from the network node. This intermediary approach maintains connection recovery capability while significantly reducing the storage resource requirements of access network devices.

Before entering inactive or suspended states to reduce power consumption, the terminal device performs preliminary actions by acquiring and storing network node information. This network node information is retained in the terminal device's memory during the low-power state. When connection recovery is needed, the terminal device can quickly provide this pre-stored network node information to the access network device, enabling efficient connection recovery without requiring continuous power consumption for maintaining connection state.