Radio Access Device Network Selection via Spatial Availability Prediction
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Solution Overview
Problem
In environments with multiple intermingled radio access networks, existing network selection methods fail to prevent communication disruptions when a terminal moves, leading to potential connection cuts off, especially for high-speed terminals, and lack an integrated administration entity for coordinating network information.
Innovation Solution
A radio access device and system that acquire network information from an administration entity to select a network for communication, considering both current and future positions, using first and second information to ensure continuous connectivity by evaluating spatial availability and predicting movement ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal selects a network based only on current position information, then network selection is simple and fast, but communication connection is cut off when the terminal moves
Solution Approach 1:
The terminal performs preliminary actions by acquiring network information not only for the current position but also for future positions within the predicted movement range. The administration entity provides network availability information for multiple locations in advance, allowing the terminal to pre-select a network that will remain available during the terminal's movement, thus preventing connection cutoff without requiring complex real-time monitoring during movement.
2Adaptability or versatility
If a terminal performs sensing for all frequency bands to recognize usable networks, then network recognition is comprehensive, but sensing time increases and battery consumption increases
Solution Approach 1:
The patent introduces an administration entity as an intermediary that centralizes network information administration. Instead of the terminal performing comprehensive sensing across all frequency bands, the administration entity collects and manages network availability information from multiple frequency bands and provides this pre-processed information to the terminal. This intermediary approach enables comprehensive network recognition while significantly reducing the terminal's sensing time and energy consumption.
3Productivity
If a terminal uses only current position network information for selection, then selection speed is fast, but communication continuity is poor for high-speed terminals
Solution Approach 1:
The system performs preliminary acquisition of network information for future positions within the predicted movement range before the terminal actually moves. The administration entity provides network availability information for multiple locations in advance, allowing the terminal to pre-determine a network that will maintain availability during movement. This preliminary action enables fast selection (comparable to current-position-only methods) while ensuring communication continuity for high-speed terminals.
4Adaptability or versatility
If no administration entity exists for network information, then system structure is simple, but coordinated network selection is difficult
Solution Approach 1:
The administration entity is designed with multi-functionality, serving multiple purposes: it collects network information from various frequency bands, determines network availability at different locations, stores this information in a centralized database, and provides it to terminals. This universal entity handles all network information management tasks, enabling coordinated network selection across multiple frequency bands while adding only a single centralized component to the system structure.
Data Source
AI summary
[Issues] To provide: a radio access device, a radio access system, a network selection method and a recording medium which is capable of: in an environment where a plurality of radio access networks is intermingled, evading cut off of a communication accompanied by a movement of a radio access device; and continuing the communication more stably.[Solution method] The radio access device includes: an acquisition means which acquires network information about a network to be used for communication from an administration entity which administers the information; and a selection means which obtains, based on the network information acquired; first information which indicates availability of a network at a current position of its own and second information which indicates availability of a network at a position other than the current position of its own, and selects a network to be used for communication using the first and the second information obtained.