Carrier Aggregation Block for Channel Simulators
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Solution Overview
Problem
Existing channel simulators face challenges in supporting carrier aggregation while minimizing path loss, which often results in a reduction in the number of valid connectable terminals, increasing time, cost, and effort in field tests.
Innovation Solution
A channel simulator with a carrier aggregation block that includes unit modules with RF couplers and switches, managed by a server to support carrier aggregation across multiple terminals with minimal path loss, ensuring efficient signal distribution and maximizing the number of connectable terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If carrier aggregation is supported using conventional channel simulator configurations, then carrier aggregation function is enabled, but the number of valid connectable terminals is reduced
Solution Approach 1:
The channel simulator is divided into multiple independent unit modules, where each unit module includes RF couplers and switches that can be independently configured. This segmentation allows different terminals to use different resource allocation patterns simultaneously, enabling carrier aggregation for some terminals while maintaining full connectivity for others.
Solution Approach 2:
The system employs dynamically controllable RF switches and couplers that can reconfigure signal paths in real-time based on terminal requirements. This dynamic reconfiguration allows the simulator to adapt resource allocation between terminals, supporting carrier aggregation functionality without permanently reducing the number of connectable terminals.
2Power
If carrier aggregation is implemented with multiple component carriers, then bandwidth capacity is increased, but path loss increases
Solution Approach 1:
The system uses RF couplers to create signal copies that are distributed to different terminals. By copying the carrier aggregation signals through isolated unit modules rather than using a single shared path, the system maintains signal strength and minimizes cumulative path loss while still providing multi-carrier bandwidth capacity to multiple terminals.
3Reliability
If field tests are conducted to verify carrier aggregation performance, then real environment validation is achieved, but time, cost, and effort are significantly increased
Solution Approach 1:
The channel simulator acts as an intermediary system that replicates real-world propagation conditions in a controlled environment. By using configurable fading models, path loss characteristics, and multi-path simulation capabilities, the simulator provides reliable validation of carrier aggregation performance without requiring extensive field tests, thereby reducing time, cost, and effort while maintaining validation reliability.
Data Source
AI summary
Provided is a channel simulator having a function of supporting a carrier aggregation and a carrier aggregation block used for the same to support a carrier aggregation function at a minimum path loss without reducing the number of valid connectable terminals. The channel simulator includes: a terminal interface block connected to each of at least four terminals through at least two transmission/reception ports; a carrier aggregation block including unit modules each including one RF coupler and one RF switch, and interposed between the terminal interface block and the terminal to support the carrier aggregation for one to four component carriers; and a management server. The carrier aggregation block includes a front-end carrier aggregation unit and a rear-end carrier aggregation unit.