Pre-configured Random Access Resources for 5G Inactive Terminals
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Solution Overview
Problem
In 5G networks, terminal devices in the RRC_INACTIVE state face high latency when restoring connections due to contention-based access methods, which fail to meet the low latency requirements of URLLC services.
Innovation Solution
Pre-configuring resources for random access by the network device, including generating and sending configuration information to the terminal device to indicate dedicated resources for access, allowing quick network reconnection and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If terminal devices in RRC_INACTIVE state use contention-based access to restore connection, then the access method is simple and resource allocation is efficient, but the access latency increases and cannot meet URLLC service requirements
Solution Approach 1:
The network device pre-configures dedicated random access resources for terminal devices in RRC_INACTIVE state before they need to restore connection. This preliminary allocation of resources eliminates the need for contention-based access, allowing terminals to immediately use their pre-assigned resources for connection restoration, thereby significantly reducing access latency while maintaining manageable system complexity through automated resource management
2Productivity
If dedicated random access resources are pre-configured for terminal devices, then access latency is reduced and URLLC service requirements are met, but network device complexity and resource management overhead increase
Solution Approach 1:
The network device applies different access resource allocation strategies to different terminal devices based on their specific service requirements. Terminal devices with URLLC services receive dedicated pre-configured random access resources for fast connection restoration, while other terminals can continue using contention-based access. This localized differentiation allows the system to achieve high productivity for critical services without universally increasing network device complexity and resource management overhead
Data Source
AI summary
Provided are a data transmission method, a network device, and a terminal device. The method includes: generating configuration information, wherein the configuration information is configured to indicate a resource used by a first terminal device in an inactive state to perform random access, and the inactive state refers to a state in which the first terminal device is disconnected from a first network device and the first network device keeps context information of the first terminal device; and sending the configuration information to the first terminal device.