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On the Performance Evaluation of a MIMO-WCDMA Transmission Architecture for Building Management Systems
Eleftherios Tsampasis1, Panagiotis K Gkonis2, Panagiotis Trakadas3
1Department of Electrical Engineering, School of Technological Applications, Technological Educational Institute of Sterea Ellada, 344 00 Dirfies Messapies, Greece. etsampasis@teiste.gr.
Sensors (Basel, Switzerland)
|January 11, 2018
Summary
This study evaluated wireless sensor node performance for building management systems. Results show diversity combining is best for indoor communications, while higher-order MIMO systems are needed as node numbers or data rates increase.
Area of Science:
- Wireless Sensor Networks
- Telecommunications Engineering
- Building Management Systems
Background:
- Modern Building Management Systems (BMSs) require robust wireless sensor node (WSN) deployments.
- Indoor wireless environments present unique challenges due to signal reflections and multipath propagation.
- Third-generation (3G) mobile network protocols like Wideband Code Division Multiple Access (WCDMA) are considered for reliable indoor communication.
Purpose of the Study:
- To investigate the performance of realistic wireless sensor node deployments in a multi-floor building.
- To analyze the impact of Multiple Input-Multiple Output (MIMO) configurations on WSN performance.
- To determine optimal communication strategies for indoor BMS applications.
Main Methods:
- Simulated a three-floor building environment with multi-antenna wireless sensor nodes and a central base station (BS).
- Employed a Multiple Input-Multiple Output (MIMO) system formulation for the BS.
- Utilized a Wideband Code Division Multiple Access (WCDMA) physical layer protocol.
- Evaluated mean transmission power per node against Signal-to-Noise Ratio (SNR) and multipath components.
Main Results:
- Multiple access interference significantly impacts overall transmission power.
- Higher-order MIMO systems are necessary to maintain adequate transmission power as node density or data rates increase.
- Diversity combining significantly outperforms spatial multiplexing for indoor WSN communications.
Conclusions:
- Diversity combining is the most suitable transmission mode for indoor WSNs supporting BMS.
- Careful selection of MIMO order is crucial for efficient power management in dense or high-throughput WSN deployments.
- Optimized WSN performance is achievable through strategic antenna configuration and protocol selection for BMS.
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