Communication Apparatus Dynamic Frequency Band Switching
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Solution Overview
Problem
Dual Connectivity in communication systems poses challenges as terminals may not be capable of receiving or transmitting signals on multiple frequency bands simultaneously, lacking a mechanism to dynamically switch between connecting to a master eNB and a secondary eNB based on traffic requirements.
Innovation Solution
A communication apparatus and base station apparatus that dynamically switch between frequency bands on a per-subframe basis, using specification information to determine when to communicate with a master eNB or a secondary eNB, allowing for efficient allocation of communication resources based on real-time and best-effort traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Dual Connectivity is implemented with master eNB and secondary eNB operating simultaneously, then communication capacity and data offloading are improved, but terminal complexity and signal reception capability requirements increase
Solution Approach 1:
The patent implements dynamic switching between master eNB and secondary eNB based on traffic conditions. The terminal can flexibly switch connection targets without fixed handover procedures, allowing the system to adapt communication paths dynamically. This resolves the contradiction by enabling high capacity utilization through multiple base stations while keeping terminal complexity manageable through dynamic rather than static multi-connection management.
Solution Approach 2:
The patent changes the operational parameters of the terminal by allowing frequency band switching between master and secondary eNBs. The terminal can operate on different frequency bands depending on which base station it connects to, optimizing communication performance. This parameter flexibility enables improved communication capacity while avoiding the need for complex simultaneous multi-frequency reception capabilities.
2Ease of operation
If the terminal switches between frequency bands for master eNB and secondary eNB, then simultaneous signal reception capability requirements are reduced, but communication timing coordination complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the terminal reports its reception status and the base stations adjust their transmission timing accordingly. This feedback loop enables automatic timing coordination without requiring complex pre-synchronization procedures. The system adapts timing based on actual reception conditions, simplifying the terminal's operation while maintaining coordinated communication.
Solution Approach 2:
The patent employs preliminary configuration of switching patterns and timing information before actual data transmission begins. The terminal is pre-configured with switching schedules and the base stations are pre-coordinated with transmission timing, eliminating the need for complex real-time coordination during active communication. This preliminary setup reduces operational complexity while enabling flexible frequency band switching.
Data Source
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AI summary
A communication apparatus performs communication in a manner such that communication with a first base station apparatus using a first frequency band and communication with a second base station apparatus using a second frequency band are switched on a per-subframe basis, obtains, from the first base station apparatus, specification information that specifies a subframe in which the first frequency band should be used and a subframe in which the second frequency band should be used among a plurality of subframes included in one or more frames, and performs control on the basis of the specification information to communicate with the first base station apparatus in the subframe in which the first frequency band should be used and with the second base station apparatus in the subframe in which the second frequency band should be used.