NR Access Procedure Selection for Small Data Resumption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In a New Radio (NR) system, when a User Equipment (UE) transitions from a connected state to an IDLE or INACTIVE state, the network side retains only the master cell group (MCG) context configuration, posing challenges in resuming data transmission and connection for UEs configured with multiple bearers and cell groups, particularly for small data transmission.
Innovation Solution
A method involving matching transmission data with a first condition to determine if it meets a restriction for direct data sending or receiving, and executing either a first or second access procedure based on this matching, where the first condition includes bearer and transmission mode information, allowing data to be transmitted directly if it meets the criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network side retains only MCG context configuration when releasing UE to IDLE/INACTIVE state, then the device complexity is reduced, but the ability to resume data transmission for UEs with multiple bearers and cell groups deteriorates
Solution Approach 1:
The patent segments the data transmission resumption process into two distinct access procedures: first access procedure for data matching the first condition (using retained MCG context), and second access procedure for data not matching the first condition (requiring full connection resumption). This segmentation allows the system to handle different data types differently, maintaining low complexity for simple cases while preserving full capability for complex cases.
Solution Approach 2:
The patent introduces dynamic adaptability by making the access procedure selection dependent on the matching result between transmission data and the first condition. The system dynamically chooses between first access procedure (simplified) and second access procedure (full) based on real-time data characteristics, allowing the complexity to adapt to the specific transmission requirements.
2Productivity
If the UE enters connected state through conventional method, then all data can be transmitted, but the transmission delay increases
Solution Approach 1:
The patent performs preliminary action by pre-configuring the first condition and first bearer information before data transmission. The network side pre-retains MCG context configuration and defines specific bearer information that can be quickly resumed. When data arrives, if it matches the pre-configured first condition, the UE can immediately use the first access procedure without going through full connection establishment, thus reducing transmission delay while ensuring all necessary data can still be transmitted.
3Loss of time
If the UE directly receives or sends data without entering connected state, then the transmission delay is reduced, but the reliability of data transmission for UEs with multiple bearers and cell groups deteriorates
Solution Approach 1:
The patent implements feedback mechanism by having the network side provide configuration information including first bearer information and first condition criteria. The UE uses this feedback to determine whether its data matches the first condition. Additionally, the network side can provide feedback through system messages indicating whether small data transmission is supported. This feedback loop ensures that direct data transmission only occurs when reliability conditions are met, while maintaining the speed advantage of not entering full connected state.
Data Source
AI summary
An access procedure processing method, an apparatus, and a communications device are provided. The method includes: performing matching between N pieces of to-be-transmitted transmission data and a first condition; and based on a matching result, executing a first access procedure or a second access procedure. M pieces of transmission data are transmitted in the first access procedure, the N pieces of the transmission data are not transmitted in the second access procedure, and the M pieces of the transmission data are data matching the first condition in the N pieces of the transmission data. M and N are positive integers, and M is less than or equal to N. The first condition is a restriction condition for the data transmitted during the access procedure. The first condition includes: first bearer information corresponding to the transmission data or a first transmission mode matching configuration information.