UE RRC Resumption With Default DRB Configuration for Small Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
User equipment (UE) in an inactive state faces additional signaling overhead and increased power consumption when attempting small data transmission due to mismatched resource configurations in the current cell, preventing data transmission and necessitating a return to the connected state.
Innovation Solution
Implementing a default RLC bearer configuration and PDCP configuration for DRBs, allowing UE to restore only relevant RRC configurations for small data transmission, thereby avoiding unnecessary signaling and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If random access is used for uplink transmission, then transmission simplicity is improved, but collision probability increases
Solution Approach 1:
The patent segments the uplink transmission process into two distinct phases: a random access phase for initial connection establishment and a scheduled access phase for subsequent transmissions. This segmentation allows the system to leverage the simplicity of random access when needed while avoiding its collision problems through structured scheduling in the second phase.
Solution Approach 2:
The patent implements preliminary action by having the terminal perform random access first to establish initial connection and obtain uplink resources. Once resources are allocated, the terminal switches to scheduled access using grant information received from the network, thereby preparing the system state to avoid collisions in subsequent transmissions.
2Reliability
If scheduled access is used for uplink transmission, then collision probability is reduced, but transmission complexity increases
Solution Approach 1:
The patent applies dynamics by making the access method adaptable rather than fixed. The terminal dynamically switches between random access and scheduled access based on the current transmission scenario and network conditions. This dynamic adaptation allows the system to optimize between simplicity and reliability depending on the specific circumstances.
Solution Approach 2:
The patent implements multi-functionality by designing the uplink transmission mechanism to handle multiple scenarios through a unified framework. The same terminal can use random access for initial connection, scheduled access for reliable data transmission, and the system can adapt to different network conditions, making the overall system universally applicable to various transmission needs.
3Productivity
If feedback mechanism is added to optimize resource allocation, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the network sends grant information to the terminal after random access, enabling the terminal to adjust its transmission parameters. This feedback loop allows for optimized resource allocation while keeping the complexity manageable by using structured feedback protocols rather than complex closed-loop control systems.
Data Source
Figure 1~2
Figure 3
AI summary
Provided in the present invention are a method performed by user equipment, and user equipment. The method performed by user equipment includes: in the case that the user equipment is in an inactive state and needs to perform small data transmission, triggering a radio resource control (RRC) connection resumption procedure; and in the RRC connection resumption procedure, using, by the user equipment, a predefined default configuration for a data radio bearer (DRB), and restoring configurations in RRC configurations for the DRB other than the default configuration. Therefore, in the case that user equipment is in an inactive state and needs to perform small data transmission, additional signaling overhead can be avoided, and power consumption can be reduced, thereby improving communication efficiency and reliability of a wireless communication system.