WirelessMAN-Advanced System は、第4世代携帯電話システム（IMT-Advanced） の標準規格の一つで、IEEE 802.16m 規格に基づいています。別名「WiMAX Release 2」としても知られています。
特徴
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高速・大容量通信：従来のWiMAX（IEEE 802.16e）と比較して、大幅な高速化と通信容量の向上が図られています。最大データレートは330Mbps（MIMO 4x4時）に達します。
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モバイル性の強化：移動中の端末でも安定した通信を維持できるように、ハンドオーバー性能などが改善されています。
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効率的な電波利用：OFDMA（Orthogonal Frequency-Division Multiple Access）などの技術を採用し、周波数帯域を効率的に利用することで、より多くのユーザーを収容できます。
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下位互換性：従来のWiMAXシステムとの互換性も考慮されています。
WiMAXとの関係
WirelessMAN-Advanced System は、WiMAXの技術をさらに発展させた規格です。WiMAXが主にモバイルブロードバンドを目的としていたのに対し、WirelessMAN-Advanced Systemは、LTEなどに対抗する第4世代移動通信システムとしての役割を担うために策定されました。
WirelessMAN-Advanced (WiMAX-Advanced)
WirelessMAN-Advancedについて UQコミュニケーションズ株式会社 2012年6月6日
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参考：一般社団法人電波産業会（ARIB）
ARIB STD-T105 WirelessMAN-Advanced System
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WirelessMAN-Advanced System, also known as IEEE 802.16m, is a wireless communication standard designed for metropolitan area networks (MANs). It is an advancement of the earlier WiMAX (Worldwide Interoperability for Microwave Access) standards, specifically the IEEE 802.16e standard. It was developed to meet the requirements for IMT-Advanced (International Mobile Telecommunications-Advanced) 4G mobile networks, providing a significant boost in performance over previous generations.
Key Features and Specifications
WirelessMAN-Advanced Systems are characterized by several key features and specifications that make them suitable for 4G mobile broadband.
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High Data Rates: It supports peak download speeds of up to 330 Mbps and upload speeds of up to 160 Mbps. This is a considerable improvement over the previous 802.16e standard, which had peak speeds around 21 Mbps.
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Scalability: The standard is designed to be scalable, supporting a range of channel bandwidths from 5 MHz to 20 MHz, which allows for flexible deployment in various frequency bands.
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Low Latency: It was designed to have low latency, which is crucial for real-time applications like video conferencing and online gaming.
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Enhanced QoS: WirelessMAN-Advanced provides an enhanced Quality of Service (QoS) framework, allowing for the prioritization of different types of data traffic. This ensures that critical services, like voice calls, receive the necessary bandwidth and performance.
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MIMO Support: The system utilizes Multiple-Input Multiple-Output (MIMO) technology, which uses multiple antennas at both the transmitter and receiver to improve data rates and reliability. It supports configurations up to 4x4 MIMO.
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Interference Mitigation: The standard includes advanced techniques for interference mitigation, improving performance in densely populated areas where multiple cells are operating in close proximity.
Applications
The main application of WirelessMAN-Advanced is to provide high-speed mobile internet access. It's a technology that can be used for a wide range of services, including:
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Mobile Broadband: Offering fast internet access to mobile devices like smartphones, tablets, and laptops.
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Fixed Wireless Access: Providing a wireless "last-mile" connection for homes and businesses, particularly in areas where laying fiber-optic cables is not feasible.
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Machine-to-Machine (M2M) Communication: The standard's low latency and high reliability make it suitable for applications that involve communication between machines, such as in smart grids and industrial automation.
