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The OpenHAN standards for home networks (sometimes called home grids) was promoted by groups such as openAMI〔http://www.openami.org〕 and UtilityAMI.〔http://www.utilityami.org〕 Both efforts aim to standardize powerline networking interoperation from a utility point of view and ensure reliable communications co-extant with AC power outlets. Both utilities and vendors of home control have promoted such standards aggressively . The ''openHAN'' label usually denotes standards favored by the utilities, not other service providers. It should be distinguished from the openADR standards that were promoted to ensure open access to customer electricity use data by all service providers. == Utility rationale == A major rationale for a single set of standards is for the utilities themselves to provide a unified ''home energy monitor'' that "provides prompt, convenient feedback on electrical or other energy use. Devices may also display cost of energy used, and estimates of greenhouse gas emissions. Various studies have shown a reduction in home energy use of 4-15% through use of home energy display. Electricity use may be measured with an inductive clamp placed around the electric main, via the electric meter (either through an optical port, or by sensing the meters actions), by communicating with a smart meter, or by direct connection to the electrical system." 〔 Such reductions are contingent on every smart appliance reporting to a single central monitor. In the US, the National Broadband Plan emphasized (in its "goal 6") that consumers must be able to share usage data with literally any service provider, not just their electric distributor, who must then be able to provide simple instructions or direct remote control of the consumer's residential appliances and home grid. Utilities accordingly have been motivated to remain ahead of the technology curve and aggressively roll out these capabilities internally. "With increasing investments in smart meters and the smart grid, these systems have the capability of integrating AMI/MDM data from multiple vendor sources. Progress reports can be provided online and by mail, and outbound messaging can be Web-based and/or SMS text-based for maximum reach. When integrated with the billing process for either print or online presentment, the utility can communicate to the customer valuable information to increase the understanding of energy use, its drivers, how to save, and comparisons to standards in their area."〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OpenHAN」の詳細全文を読む スポンサード リンク
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