Terminal Standby Communication Using Base Station Change Detection
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Solution Overview
Problem
In the RRC_INACTIVE state of 5G wireless communication, terminal devices face inefficiencies due to the need to transition to RRC_CONNECTED state for data transmission when the base station does not hold the MA signature, leading to signaling overhead and degraded communication efficiency.
Innovation Solution
The terminal device monitors for changes in the base station to which a signal is to be transmitted while holding an MA signature, allowing it to determine whether to maintain the RRC_INACTIVE state or transition to RRC_CONNECTED state based on the base station change, thereby optimizing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device transitions to RRC_CONNECTED state to transmit data, then data transmission reliability is improved, but communication efficiency and power consumption deteriorate due to frequent state transitions and signaling overhead
Solution Approach 1:
The terminal device autonomously determines whether to remain in RRC_INACTIVE state or transition to RRC_CONNECTED state based on local judgment of target base station changes, without requiring network verification. This self-service approach maintains reliability by ensuring data can be transmitted when necessary while improving efficiency by avoiding unnecessary state transitions and signaling overhead.
2Productivity
If the terminal device remains in RRC_INACTIVE state to maintain efficiency, then power consumption is reduced, but data transmission capability deteriorates when the base station does not hold MA signature
Solution Approach 1:
The terminal device performs preliminary monitoring of target base station changes before attempting data transmission. By detecting whether the target base station has changed from the original base station that provided the MA signature, the terminal proactively determines the appropriate action (remain in RRC_INACTIVE or transition to RRC_CONNECTED), preventing transmission failures before they occur and maintaining both efficiency and reliability.
3Productivity
If the terminal device monitors target base station changes continuously, then communication efficiency is improved by avoiding unnecessary RRC_CONNECTED transitions, but device complexity and processing load increase
Solution Approach 1:
The monitoring function is activated selectively based on the terminal's operational state. The terminal monitors target base station changes specifically when in RRC_INACTIVE state with valid MA signature, and suspends monitoring when in RRC_CONNECTED state or when MA signature is invalid. This localized application of monitoring reduces processing complexity while maintaining communication efficiency.
Data Source
AI summary
A terminal comprises a function capable of operating in a plurality of states that include a first state in which a connection with a base station has been established, and a second state in which a connection with a base station has not been established, but the base station holds information regarding the terminal device. After starting operation in the second state from a state in which the terminal operates with a first base station in the first state, if predetermined information that enables communication with the first base station in the second state and that has been acquired from the first base station in the first state is held, the terminal determines whether a signal transmission target has changed from the first base station to a second base station device, and performs communication according to a result of the determination.