本文件定义了一个开放规范，用于基于IntServ模型为基于IP的多媒体卫星系统实现QoS，包括使用RSVP进行资源分配和控制IETF RFC 2210[4]。重点是IP层QoS功能的映射，主要是保证（GS IETF RFC 2212[6]）和控制负载（CL IETF RFC 2211[5]）服务，到跨SI-SAP的BSM特定QoS功能。这导致了SI-SAP的规范，包括其与更高和更低层的交互。本文件基于ETSI TR 102 157[i]的性能、可用性和服务质量技术报告的调查结果。 2] 和QoS架构技术规范ETSI TS 102 462[1]。它还基于当前的ETSI BSM架构文件ETSI TS 102 292[i.3]，并与相关IETF标准保持一致。提供实时多媒体服务（如IntServ模型提供的服务）的关键是资源预留协议（如RSVP）与下层（即链路层）资源预留的交互。对于BSM网络中的IntServ提供，SI-SAP处的QIDs（队列标识符）概念是用于提供与备选链路层ETSI TS 102 357[2]的这种交互的概念。 QID表示抽象队列，每个队列具有定义的服务类，用于将IP数据包传输到SD层。依赖于卫星的较低层负责根据定义的属性将卫星容量和/或特定转发行为分配给这些抽象队列。本文讨论了在IP层采用IntServ时，这些QID管理中出现的QoS问题。描述了BSM IntServ功能架构，并指定了确保QoS提供所需的功能、协议和原语。 用于单播服务的IntServ是本文档的主要重点，尽管所描述的方法也可能适用于多播。目前，本文件不包括使用其他IP资源预留协议，如NSIS。注:RSVP可用于除IntServ资源保留之外的许多其他功能，这些功能包括 不在本文件的范围内:区分服务资源保留。策略分发。交通工程。

The present document defines an open specification for enabling QoS for IP-based multimedia satellite systems, based on the IntServ model, including the use of RSVP for resource allocation and control IETF RFC 2210 [4]. The focus is on the mapping of IP-layer QoS functions, primarily the Guaranteed (GS IETF RFC 2212 [6]) and Controlled Load (CL IETF RFC 2211 [5]) services, to BSM-specific QoS functions across the SI-SAP. This results in specifications for the SI-SAP including its interactions with higher and lower layers.The present document is based on the findings of the Technical Report on Performance, Availability and Quality of Service ETSI TR 102 157 [i.2] and the Technical Specification on QoS Architecture ETSI TS 102 462 [1]. It is also based on current ETSI BSM architecture document ETSI TS 102 292 [i.3] and is aligned with the relevant IETF standards.The key to providing real-time multimedia services such as those offered by the IntServ model is the interaction of a resource reservation protocol like RSVP with lower layer (i.e. link layer) resource reservation. For IntServ provision in a BSM network the concept of QIDs (Queue Identifiers) at the SI-SAP is the concept used to provide this interaction with alternative link layers, ETSI TS 102 357 [2]. QIDs represent abstract queues, each with a defined class of service, for transfer of IP packets to the SD layers. The satellite dependent lower layers are responsible for assigning satellite capacity and/or particular forwarding behaviour to these abstract queues according to defined properties.The present document deals with the QoS issues arising in the management of these QIDs, when IntServ is adopted at IP layer.A BSM IntServ functional architecture is described and the functions, protocols and primitives needed to ensure QoS provision are specified.IntServ for unicast services is the primary focus of the present document, although the approach described may also be applicable to multicast.The use of other IP resource reservation protocols such as NSIS is at present excluded from the present document.NOTE: RSVP can be used for a number of other functions, apart from IntServ Resource reservation, which are not in the scope of the present document:DiffServ resource reservation.Policy distribution.Traffic engineering.