5G Terminal MT-SDT Paging and Radio Bearer Resumption
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Solution Overview
Problem
In 5G communication systems, terminal devices in the RRC_INACTIVE state experience unnecessary power consumption and signaling overhead due to the current transmission mechanisms, particularly when handling small data amounts and low transmission frequencies, with no clear solution for Mobile Terminated Small Data Transmission (MT-SDT) in inactive states.
Innovation Solution
A method where a terminal device in an inactive state receives a paging message indicating MT-SDT, resumes suspended radio bearers to receive data without switching to the RRC_CONNECTED state, thereby reducing power consumption and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal device switches to RRC_CONNECTED state to receive data, then data transmission can be performed, but power consumption and signaling overhead increase
Solution Approach 1:
The patent segments the radio bearer resources into suspended and active parts, allowing the terminal to maintain partial connectivity for small data transmission without fully transitioning to connected state, thus reducing power consumption while maintaining necessary data transmission capability
Solution Approach 2:
The patent introduces dynamic state transitions where the radio bearer can be temporarily activated for small data transmission and then suspended again, allowing the system to adapt connectivity level to actual data transmission needs rather than maintaining constant connected state
2Reliability
If terminal device switches to RRC_CONNECTED state to receive data, then data transmission can be performed, but signaling overhead increases
Solution Approach 1:
The patent performs preliminary suspension of radio bearers in the inactive state, preserving their configuration information. When small data transmission is needed, the bearers can be quickly reactivated without going through full connection establishment procedures, reducing signaling overhead
Solution Approach 2:
The patent applies partial action by activating only the necessary portion of radio bearers for small data transmission rather than fully establishing all connected state resources, thereby reducing signaling overhead while maintaining sufficient data transmission capability
3Use of energy by moving object
If terminal device releases resources to enter RRC_INACTIVE state, then power consumption is reduced, but data transmission capability is lost
Solution Approach 1:
The patent applies local quality by maintaining specific radio bearer resources in a suspended state with preserved configuration, allowing selective activation for small data transmission while keeping other resources released, thus balancing power consumption and data transmission capability locally
4Speed
If terminal device maintains radio bearers in suspended state, then quick reactivation is possible, but some resources are occupied
Solution Approach 1:
The patent uses partial action by suspending and preserving only the specific radio bearer resources needed for small data transmission rather than all resources, enabling quick reactivation for SDT while minimizing resource occupation for other purposes
Data Source
AI summary
Provided is a communication processing method. The method includes: a terminal device in an inactive state receives a paging message, wherein the paging message incudes first indication information, and the first indication information is used for indicating that a network side triggers mobile terminated-small data transmission (MT-SDT); and the terminal device resumes at least part of radio bearers from suspended radio bearers, wherein the at least part of radio bearers are used for receiving to-be-transmitted data corresponding to the MT-SDT. Further provided are a terminal device and a target access network device.