BS PD CEN ISO/TS 17426:2016规定了相关速度信息服务，即关于 提供上下文速度信息服务、支持该服务的数据流，以及 服务结果的表示，规定了上下文速度信息服务应满足的要求，规定了车辆ITS站、路边ITS站的ITS站（ITS-S）应用程序， 中央ITS站和个人ITS站，这是实例化上下文速度所需的 信息服务，使用定义的方法指定一组通信需求和目标（概要） 在ISO 17423中，选择性能级别（尽力而为或实时等）、信心和安全性 （身份验证、加密等）用于每个上下文速度信息服务通信 在ITS站点之间流动，选择ITS站点设施层提供的相关功能和程序（参见 ISO 17429），并指定上下文速度所使用的消息、消息集结构、内容和语法 信息服务。本技术规范考虑了相关速度的传输情况 从基础设施/路边到车辆的信息，用于向车辆驾驶员进一步介绍 驾驶员该场景预见到，上下文速度信息的计算是在 基础设施侧，而不是车内。强制速度限制或建议速度是上下文速度的输出 信息服务（在本技术规范中考虑的情况下）由 道路运营商在其交通控制中心或类似的基础设施（如路边its站）内。到 通过空中（无线通信）将此信息传输给车辆（以及驾驶员）， 需要定义的消息。本技术规范中规定了这些信息。当相关速度信息到达车辆时，可能需要进一步的预处理 在上下文速度信息之前，以及（如果可用）关于速度限制的附加说明 或建议，可以提交给驾驶员。 本技术规范规定了 处理消息时需要满足的要求。它没有具体说明车辆是如何行驶的 处理传入的消息。支持此应用程序的信息的生成、其资格和相关性不受限制 本技术规范的范围。本技术规范涉及用例1“将强制限速信息提供到 车辆-出于驾驶员意识的目的“和用例2”将建议速度信息提供到 车辆- 交叉引用:ISO 21217ISO 24102-3ISO 24102-6ISO/TS 17419ISO/TS 17423ISO/TS 17425ISO/TS 17427ISO/TS 17429ISO/TS 18750ISO/TS 19321ISO/TS 14823:2008ISO/TR 17465-1ISO/TR 25102ISO/IEC 8825-2:2008ISO/IEC 9646-1ISO/IEC 9646-7购买本文件时可提供的所有当前修订版。

BS PD CEN ISO/TS 17426:2016specifies the Contextual Speed Information Service, namely the general requirements regarding the provision of the Contextual Speed Information Service, the data flow supporting the service, and the presentation of the service result,specifies the requirements to be fulfilled by the Contextual Speed Information Service,specifies the ITS Station (ITS-S) application processes of the vehicle ITS station, roadside ITS station, central ITS station, and personal ITS station that are required to instantiate the Contextual Speed Information Service,specifies sets of communication requirements and objectives (profiles) using the methods defined in ISO 17423 to select the level of performance (best effort or real-time, etc.), confidence and security (authentication, encryption, etc.) for each Contextual Speed Information Service communication flow between ITS stations,selects relevant functions and procedures provided by the ITS station facilities layer (see ISO 17429), andspecifies messages, messages sets structure, content, and syntax to be used by the Contextual Speed Information Service.This Technical Specification considers the scenario for the transmission of Contextual Speed information from the infrastructure/roadside to the vehicle, for onward presentation to the vehicle's driver. This scenario foresees that the calculation of Contextual Speed information is performed on the Infrastructure side, not within the vehicle.Mandatory speed limits or advisory speed recommendations are output of the Contextual Speed Information Service which (in the scenario considered in this Technical Specification) is run by the Road Operator in its Traffic Control Centre or comparable infrastructure (e.g. Roadside ITS Station). To transfer this information to the vehicle (and therefore the driver) over the air (wireless communication), defined messages are required. These messages are specified in this Technical Specification.When Contextual Speed information arrives in the vehicle, further pre-processing might be necessary before the Contextual Speed information, and, if available, additional explanations on speed limits or recommendations, can be presented to the driver. This Technical Specification specifies the requirements that need to be fulfilled when processing the messages. It does not specify how the vehicle handles the incoming messages.The production of information supporting this application, its qualification and its relevance are out of the scope of this Technical Specification.This Technical Specification addresses Use Case 1 "Provision of mandatory speed limit information into vehicle - for driver awareness purposes" and Use Case 2 "Provision of advisory speed information into vehicle - for driver awareness purposes".Cross References:ISO 21217ISO 24102-3ISO 24102-6ISO/TS 17419ISO/TS 17423ISO/TS 17425ISO/TS 17427ISO/TS 17429ISO/TS 18750ISO/TS 19321ISO/TS 14823:2008ISO/TR 17465-1ISO/TR 25102ISO/IEC 8825-2:2008ISO/IEC 9646-1ISO/IEC 9646-7All current amendments available at time of purchase are included with the purchase of this document.