2-Step RACH Access Control via Broadcast Signaling
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Solution Overview
Problem
The 2-step RACH in mobile communication systems has limited pre-configured resources, making it necessary to control which terminals can use this method to avoid resource waste, while also aiming to shorten the random access time and improve network entry speed.
Innovation Solution
A method where a network device sends a first system broadcast message indicating whether a target cell supports the 2-step RACH, and a second message providing access control information, allowing terminals to determine if they can perform the 2-step RACH based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the 2-step RACH is opened to all UEs and/or all services, then the network access speed is improved, but the pre-configured resources are wasted
Solution Approach 1:
The patent applies local quality by enabling 2-step RACH selectively for specific UEs and/or services rather than uniformly across all UEs. The network device determines which UEs are capable of 2-step RACH based on their capabilities and service requirements, then configures them accordingly. This selective approach ensures that resources are utilized efficiently only where needed, preventing waste while maintaining fast access for supported users.
Solution Approach 2:
The patent implements dynamics by making the 2-step RACH configuration flexible and adaptive. The network device can dynamically adjust which UEs are allowed to use 2-step RACH based on current network conditions, UE capabilities, and service requirements. This dynamic configuration allows the system to optimize resource usage in real-time while maintaining the ability to provide fast access when conditions are favorable.
2Loss of energy
If the 2-step RACH is restricted to specific UEs and services, then resource waste is avoided, but the network access time delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring MSG3 resources for 2-step RACH in advance. The network device prepares the necessary resources and configurations before they are needed, so that when a UE requires random access, the fast 2-step procedure can be immediately executed if conditions are met. This pre-preparation eliminates the need for resource allocation delays during the actual access process.
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors UE capabilities, service requirements, and network conditions to continuously optimize which UEs use 2-step RACH. This feedback loop ensures that the system can quickly adapt to changing conditions and maintain fast access performance while preventing resource waste. The network device uses this feedback to make real-time decisions about enabling or disabling 2-step RACH for specific UEs.
Data Source
AI summary
Embodiments of the present disclosure provide a random access control method and apparatus, a network device and a terminal. The method includes: sending, by a network device, a first system broadcast message, where the first system broadcast message includes a first indication information that is used for indicating whether a target cell of a terminal supports a 2-step random access process; and sending, by the network device, a second system broadcast message, where the second system broadcast message includes access control information corresponding to the 2-step random access process; the first indication information and the access control information are used by the terminal to determine whether the 2-step random access process is allowed to be performed.