Synchronous Access Channel Resource Management for Uplink Synchronization
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Solution Overview
Problem
In communication systems, the random access procedure leads to resource wastage and inefficient utilization due to the need for guard times to avoid interference from asynchronous user equipment, resulting in increased resource occupation and delays.
Innovation Solution
Implementing a method where user equipment uses synchronous channel resources for access, dynamically adjusting the number of synchronous channel resources based on system load, and determining Timing Advance (TA) values using system information to optimize access requests and reduce conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedure is used for user equipment access, then user equipment can obtain timing advance value and uplink synchronization, but guard time must be added to avoid interference from asynchronous user equipment, resulting in large resource occupation of physical random access channel
Solution Approach 1:
The patent segments user equipment into two categories: synchronized user equipment (with valid TAT) and asynchronous user equipment (without valid TAT or TAT expired). Different access procedures are assigned to different segments, allowing synchronized UE to use efficient synchronous access while asynchronous UE use traditional random access with guard time, thereby reducing overall resource occupation.
Solution Approach 2:
The patent implements dynamic access procedure selection based on the user equipment's synchronization state. The system dynamically determines whether a UE is synchronized by checking TAT validity, and dynamically switches between synchronous and asynchronous access procedures accordingly, optimizing resource usage in real-time.
2Ease of operation
If random access procedure is used for synchronized user equipment, then user equipment can request uplink resources, but access resource will be wasted due to unnecessary guard time and synchronization procedures
Solution Approach 1:
The patent requires user equipment to maintain synchronization state (valid TAT) before accessing uplink resources. This preliminary synchronization action ensures that when synchronized UE need to request uplink resources, they can do so directly without going through the full random access procedure, eliminating waste of access resources.
Solution Approach 2:
Synchronized user equipment that maintains valid TAT can independently request uplink resources without base station-assisted synchronization procedures. The UE serves itself by maintaining synchronization state, allowing direct resource requests and avoiding unnecessary access resource consumption.
3Object-affected harmful factors
If guard time is added to physical random access channel to avoid interference from asynchronous user equipment, then interference is reduced, but resource occupation increases
Solution Approach 1:
The patent applies different access channel qualities to different user equipment types. Synchronized user equipment uses a dedicated synchronous access channel without guard time requirements, while asynchronous user equipment uses the traditional random access channel with guard time. This local differentiation eliminates unnecessary guard time for synchronized UE, reducing overall resource occupation while maintaining interference protection for asynchronous UE.
Data Source
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AI summary
Embodiments of the present invention provide an access method, a user equipment and a base station. In the present invention, a user equipment obtains a first synchronous channel resource; uses the first synchronous channel resource to send an access request to a base station, for requesting to access the base station; receives access feedback sent by the base station, and determining whether access is successful according to the access feedback. In this way, occupation of the user equipment on an access resource during access may be reduced, and utilization efficiency of the access resource is improved.