Dynamic Signature Allocation for Mobile Handover Efficiency
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Solution Overview
Problem
In the context of Non-contention based Random Access in mobile communications, the inefficiency in signature usage during handover procedures leads to prolonged connection times and reduced bandwidth utilization, as the selected signature becomes unavailable for other mobile stations during the handover process, resulting in lower usage efficiency and potential collisions.
Innovation Solution
Implementing a signature allocation mechanism that allows unused signatures and random access channels to be reassigned to other mobile stations based on the end time of signature validity, enabling efficient reuse and reducing the need for Contention based Random Access, which prolongs connection times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a signature is allocated to a mobile station apparatus for Non-contention based Random Access, then the mobile station can perform fast handover, but the signature becomes unavailable for other mobile stations during the handover process, reducing signature usage efficiency
Solution Approach 1:
The patent implements dynamic signature allocation where the base station monitors handover progress and reassigns signatures in real-time. When a mobile station completes handover, its signature is immediately released and reallocated to waiting mobile stations, transforming the static signature allocation into a dynamic resource management system that adapts to current network conditions
Solution Approach 2:
The patent introduces a time dimension to signature allocation by implementing multiple signature pools corresponding to different handover stages. Instead of a single signature being occupied throughout the entire handover process, the system creates temporal layers where signatures at different stages can be independently managed and reused, effectively adding a time-based dimension to resource allocation
2Reliability
If the base station waits for handover completion before releasing the signature, then the mobile station can complete handover smoothly, but the connection time is prolonged and bandwidth utilization is reduced
Solution Approach 1:
The patent prepares alternative signatures in advance within signature pools before they are actually needed. When a mobile station is undergoing handover, pre-prepared signatures are already available in the pool, allowing immediate reallocation without waiting for handover completion. This preliminary preparation of resources eliminates the waiting period while ensuring handover reliability is maintained
Solution Approach 2:
The patent implements a signature recovery mechanism where signatures are not permanently occupied during handover but are temporarily held and then recovered for reuse. The base station monitors handover status and automatically recovers signatures once mobile stations complete their transitions, converting lost time into recoverable resources that can be immediately put back into service
3Productivity
If multiple mobile station apparatuses use the same signature simultaneously, then signature usage efficiency improves, but collisions may occur between mobile stations
Solution Approach 1:
The patent segments the signature resource into multiple independent signature pools, each associated with specific handover stages or groups of mobile stations. This segmentation allows different pools to operate independently, enabling multiple mobile stations to use signatures simultaneously in different pools without causing collisions, while maintaining high overall signature usage efficiency
Solution Approach 2:
The patent introduces the base station as an intermediary that manages signature allocation and monitors collision conditions. The base station acts as a mediator between mobile stations, coordinating signature usage across multiple devices, detecting potential collisions, and dynamically adjusting allocations to prevent conflicts while maximizing resource utilization
Data Source
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AI summary
When the base station apparatus determines that it is necessary to make the mobile station apparatus execute random access, it is determined whether there is an unused signature. Then, the validity period during which the mobile station apparatus can use a signature is determined and the end time of the validity period is calculated. The signature and the calculated end time are included into a random access preamble allocation message, which is transmitted to the mobile station apparatus. The mobile station apparatus extracts the signature and the end time from the random access preamble allocation message, and determines random access channels through which a random access preamble including the signature can be transmitted, based on the extracted end time. As a result, it is possible to provide a base station apparatus and the like which, even if the signature belongs to the validity period, can achieve efficient communication between the base station apparatus and the mobile station apparatus by assigning the signature to another mobile station apparatus.