30.211

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30.211 is a standard established by the International Telecommunications Union (ITU) that defines technical specifications of wireless access in a metropolitan area network (WMAN), such as a WiMAX network. It is based on IEEE 802.16e technology, and was most recently revised in 2008. The purpose of the standard is to allow different devices to communicate regardless of their manufacture, thus creating a unified industry-wide standard of interoperability.

The main purpose of the standard is to provide a reliable and secure service in terrestrially-based wireless broadband networks. The application field of 30.211 is located in the scope of providing high speed internet access to domestic and business users. As such, these networks can support a variety of applications ranging from simple voice services, to more sophisticated multimedia services, such as video streaming and data sharing. Additionally, the standard covers frequencies from 2-11 GHz, meaning that it can provide very high speeds to areas with large numbers of users.

The main principle of 30.211 is support for mobility, scalability, integration, and manageability. With mobility, the standard allows users to move around an area while still maintaining a reliable connection. This is enabled through handoff mechanisms, which are algorithms used to switch users from one base station to the next. Scalability enables the WMAN to expand in size and in the services it can provide as needed. Integration enables different devices to communicate seamlessly, regardless of their manufacture. Lastly, manageability allows networks to be monitored and controlled remotely in order to ensure that services are provided efficiently.

The standard also includes extra elements, such admission control and quality of service (QoS) parameters. Admission control manages the rates of connection requests in order to avoid network congestion. QoS parameters allow for certain types of services to be allocated more bandwidth than others, thus ensuring that they perform as expected. This is helpful for services like video streaming, which need a certain promised bandwidth to be usable.

Overall, 30.211 provides a basis for an industry-wide, interoperable solution for WMANs. The standard covers aspects related to mobility, scalability, integration, and manageability, as well as QoS and admission control. It is a reliable and secure solution, especially in areas with a high density of users, and can support a variety of services. As such, it provides a foundation for future developments in wireless technology.

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