Base Station Inactive State Connection Update
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Solution Overview
Problem
In wireless communication systems, especially in inactive states, wireless terminals face challenges in changing connection setting information and resume IDs, leading to potential communication failures when resuming communication.
Innovation Solution
A base station is configured to manage and transmit updated connection setting information and IDs to wireless terminals while in an inactive state, ensuring seamless communication resumption by distinguishing between radio link and upper-layer connection settings and using identification information for each.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If connection setting information and resume ID are stored and reused during inactive state, then communication resumption is streamlined and power consumption is reduced, but communication may fail when setting information needs to be changed
Solution Approach 1:
The base station performs preliminary actions by monitoring and detecting changes in connection setting information during the inactive state, and proactively notifies the wireless terminal of these changes before communication resumption is attempted. This allows the terminal to update its stored information in advance, ensuring reliable resumption while maintaining power savings.
Solution Approach 2:
A feedback mechanism is established where the base station detects changes in connection setting information and actively notifies the wireless terminal. This feedback loop ensures that the terminal has up-to-date information when resuming communication, resolving the reliability issue while preserving the power efficiency benefits of the inactive state.
2Reliability
If connection setting information is updated during inactive state, then communication reliability is improved, but communication traffic volume increases
Solution Approach 1:
The patent extracts only the essential change information from the full connection setting information and transmits only this extracted subset to the wireless terminal during inactive state. This minimizes the traffic volume required for updates while ensuring the terminal receives necessary information for reliable communication resumption.
Solution Approach 2:
The system changes the parameter of information transmission by sending only the changed portions of connection setting information rather than complete information sets. This parameter optimization reduces traffic volume while maintaining the reliability improvement needed for successful communication resumption.
3Productivity
If resume function is implemented to omit control information communication, then communication efficiency is improved and power consumption is reduced, but the system becomes complex in managing connection settings
Solution Approach 1:
The base station acts as an intermediary that monitors connection setting changes and manages the notification process to wireless terminals. This intermediary role simplifies terminal complexity by handling the sophisticated change detection and notification logic at the base station, while terminals only need to respond to simple notifications, maintaining resume function efficiency.
Data Source
AI summary
A base station includes a memory; a processor configured to transmit a wireless signal to a wireless terminal and to receive a wireless signal from the wireless terminal; and a controller configured to, while a radio link between the wireless terminal and the base station is disconnected, and an upper-layer connection between the base station and an upper-layer node is maintained wherein the wireless terminal uses the upper-layer connection for communication through the base station, in response to an event that one of first setting information for setting the radio link and second setting information for setting the upper-layer connection is changed, transmit setting information having been changed among the first setting information and the second setting information to the wireless terminal through the processor.