Fast Base Station Switching in Multi-Frequency Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face limitations in frequency band usage, particularly in broadband services, due to limited frequency resources, and lack a specified method for fast switching between frequency assignments and base stations.
Innovation Solution
A method for performing fast base station switching in a wireless communication system using multiple frequency assignments, where a mobile station acquires overlay mode support information, scans neighbor base stations, and switches to a target frequency assignment, enabling seamless signal transmission and reception across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mobile station is limited to one frequency assignment, then the system complexity is reduced, but the data transmission speed and service capability are limited
Solution Approach 1:
The frequency spectrum is segmented into multiple frequency assignments (FA1, FA2, etc.), each managed by different base stations. The mobile station can selectively access different frequency assignments based on service requirements, enabling high-speed data transmission without requiring the entire system to operate in complex multi-frequency mode simultaneously.
Solution Approach 2:
The mobile station is designed with multi-functionality to operate in both single-frequency and multi-frequency modes. It can perform initial network entry in one frequency assignment and subsequently switch to another frequency assignment for high-speed data transmission, making it adaptable to different service scenarios without increasing overall system complexity.
2Productivity
If multiple frequency assignments are used for high-speed data transmission, then service capability is enhanced, but the procedure complexity for frequency band switching increases
Solution Approach 1:
The mobile station performs preliminary actions by acquiring overlay mode support information and frequency assignment information during initial network entry. Neighbor base station information including FA lists is pre-acquired and stored, enabling fast switching to target frequency assignments without complex real-time decision procedures.
Solution Approach 2:
The serving base station acts as an intermediary by providing overlay mode support information and frequency assignment information to the mobile station. It also provides neighbor base station information including FA lists, which mediates the switching process between different frequency assignments managed by different base stations, simplifying the overall procedure.
3Adaptability or versatility
If inter-FA handover is performed between different base stations, then frequency band utilization is improved, but the switching time increases
Solution Approach 1:
The mobile station pre-acquires overlay mode support information and frequency assignment information during initial network entry. It also pre-acquires neighbor base station information including FA lists. This preliminary preparation enables fast switching to target frequency assignments without requiring time-consuming scanning or information acquisition during the actual handover process.
Solution Approach 2:
The fast base station switching mechanism allows the mobile station to skip the traditional lengthy inter-FA handover procedure by directly switching to a target frequency assignment based on pre-acquired information. The switching indication is transmitted to the target base station, which then provides overlay mode information, enabling rapid transition without the time-consuming steps of conventional handover.
Data Source
AI summary
A method for performing fast base station switching in an mobile station capable of using multiple frequency assignments in a wireless communication system are provided, in which initial network entry to a base station managing at least two frequency assignments is performed in one of the at least two frequency assignments, overlay mode support information and FA information about the at least two frequency assignments are acquired by the initial network entry, the overlay mode support information indicating whether the base station supports multiple frequency assignments, the base station is notified that the mobile station will operate in an overlay mode using multiple frequency assignments based on the acquired information, and signals are transmitted and received to and from the base station in the at least two frequency assignments.