Base Station Triggering Message for Light Connection State Recovery
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Solution Overview
Problem
In 4G networks, there is no effective method for the network side to find and transmit downlink traffic data to a user equipment in a light connection state, as the user equipment may not be accessing the base station, leading to challenges in initiating a dedicated data scheduling transmission.
Innovation Solution
A method where a base station generates a triggering message based on the user equipment's identifier in a light connection state, using an enhanced paging message carried in a downlink control channel or shared channel, to recover the user equipment to a connection state, allowing for the transmission of downlink traffic data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the core network sends downlink traffic data to a base station for a user equipment in light connection state, then the data can be delivered to the UE, but the base station cannot find the UE since it is not accessing the base station
Solution Approach 1:
The patent introduces an enhanced paging message as an intermediary mechanism between the core network and the UE in light connection state. This enhanced paging message, carried in downlink control channels or shared channels, serves as a mediator to notify the UE of incoming downlink data without requiring the UE to be in full connection state, thus resolving the contradiction between data delivery reliability and UE detection difficulty
Solution Approach 2:
The UE autonomously monitors the enhanced paging message in downlink control channels or shared channels while in light connection state. This self-service mechanism allows the UE to independently detect incoming data notifications without requiring base station initialization or full connection establishment, enabling the base station to deliver data to UEs that are not actively accessing the network
2Ease of operation
If the core network initiates a paging process for a UE in idle state, then the UE can be located, but for a UE in light connection state, the network side has no effective approach to find the UE
Solution Approach 1:
The enhanced paging message mechanism serves multiple functions across different UE states. It can notify UEs in both idle state and light connection state of incoming downlink data, making the paging system universal rather than state-specific. This multi-functional approach allows the same mechanism to handle UE finding in various connection states, improving both ease of operation and state-specific adaptability
3Reliability
If the base station generates an enhanced paging message to notify the UE, then the UE can be recovered to connection state, but this requires additional signaling overhead
Solution Approach 1:
The patent merges the paging notification function with existing downlink control channels or shared channels. By carrying the enhanced paging message within these existing channel structures rather than creating a separate dedicated paging channel, the solution reduces signaling complexity while maintaining reliable connection recovery notification to the UE
Data Source
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AI summary
A method for transmitting downlink data, a base station and a user equipment are provided. The method includes: generating, by a base station, on reception of downlink traffic data sent by a core network to a user equipment in a light connection state, a triggering message based on an identifier of the user equipment in the light connection state; and controlling, based on the triggering message, the user equipment in the LC state to recover to a connection state. Furthermore, the downlink traffic data may be sent to the user equipment which has been restored to the connection state.