Overview Of IEEE Research Articles

TVホワイトスペース帯無線LANシステム国際標準規格IEEE 802.11afの概要

TVホワイトスペース帯無線LANシステム国際標準規格IEEE 802.11afの概要

Shortest path bridging: Efficient control of larger ethernet networks

This article provides an overview of IEEE 802.1aq shortest path bridging and outlines some application scenarios that will benefit from the new capabilities SPB offers. SPB is built on the IEEE 802.1 standards, and inherits unaltered the existing OAM and data plane scalability enhancements, such as the MAC-in-MAC forwarding paradigm. SPB introduces link state control for bridge networks, thus improving control plane scalability, network bandwidth utilization, and control of the forwarding paths. Furthermore, SPB minimizes latency by forwarding frames on the shortest path. Network-wide load balancing is also supported by spreading the traffic on multiple equal cost paths in a user controllable manner. Thus, SPB provides enhanced control for Ethernet networks in metro, RAN backhaul, or data center environments.

An overview of IEEE 802.21: media-independent handover services

In recent years multitechnology-enabled terminals have become available. Such multimode terminals pose new challenges to mobility management. In order to address some of these challenges, the IEEE is currently working on a new specification on media-independent handover services (IEEE 802.21 MIH). The main aim of this specification is to improve user experience of mobile terminals by enabling handovers between heterogeneous technologies while optimizing session continuity. In this article we provide an overview of the current status of the IEEE 802.21 specification.

Instructional Overview of IEEE 1349-2001—Guide for the Application of Electric Motors in Class I, Division 2 Hazardous (Classified) Locations

This work presents an overview of IEEE 1349-2001, a Guide that assists individuals, organizations, and suppliers with the application of motors in Class I, Division 2 locations, where flammable gases and vapors may occasionally be present. Three-phase and single-phase ac synchronous and induction electric motors in sizes from fractional horsepower through 10 000 hp and beyond are covered in the Guide. Primary emphasis is on the use of general-purpose enclosures and precautions against excessive surface temperatures and sparking of rotor bars and enclosure joints. The Guide also provides guidance for maintaining the life-cycle integrity of motors in Division 2 locations. Existing codes and standards, such as the National Electrical Code, contain cautionary notes for general-purpose motor applications in Division 2 areas. This Guide documents industry experience and established practices for the application of general-purpose motors in Division 2 locations and provides guidance for applying motors in these locations. It is not a specification and is not intended to be used as a specification for purchasing motors installed in Division 2 locations. This paper does not replace the Guide, but should be used to supplement and understand the Guide. Significant motor temperature information is contained in the Guide including maximum recommended Division 2 exposed surface temperatures at full load. Manufacturers, users, and other industry experts worked about eight years to develop this consensus standard. It was approved by the IEEE-SA Standards Board in December 2001 and published in June 2002.

IEEE 1242: Guide for Specifying and Selecting Cable for Petrochemical Plants

The purpose of this article is to provide an overview of IEEE 1242-1999, Guide for Specifying and Selecting Power, Control, and Special Purpose Cable for Petroleum and Chemical Plants. This standard addresses wire and cable design, materials, testing, and installation, along with illustrations of typical constructions and application criteria.