CEA-721.4-1998.pdf
《CEA-721.4-1998.pdf》由会员分享,可在线阅读,更多相关《CEA-721.4-1998.pdf(29页珍藏版)》请在三一文库上搜索。
1、 CEA Standard Generic Common Application Language Quality of Service ANSI/CEA-721.4 February 1998 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networkin
2、g permitted without license from IHS -,-,- NOTICE CEA Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting
3、 the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect preclude any member or nonmember of CEA from manufacturing or selling products not conforming to s
4、uch Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members, whether the standard is to be used either domestically or internationally. Standards, Bulletin
5、s and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or oth
6、er technical publication. This CEA Standard is considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the CEA Standard and the IEC document can be made. This Standard do
7、es not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (Fr
8、om Project Number 4570, formulated under the cognizance of the CEA R7 Home Networks Committee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2002 Technology & Standards Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE: Please call Global Engineering Documents, USA and Canada (1-800-854-71
9、79) International (303-397-7956), or http:/ All rights reserved Printed in U.S.A. Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted with
10、out license from IHS -,-,- PLEASE! DON”T VIOLATE THE LAW! This document is copyrighted by CEA and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For information, contact: Global Engineer
11、ing Documents 15 Inverness Way East Englewood, CO 80112-5704 or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 See http:/ or email Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resa
12、le, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networkin
13、g permitted without license from IHS -,-,- CEA-721.4 (Formerly Titled EIA-721.4) Generic Common Application Language (Generic CAL) Specification This document is Part 4, the Generic CAL Quality-of-Service portion of EIA-721. Issued: EIA-721.4, 11-24-97 Copyright Consumer Electronics Association Prov
14、ided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employe
15、es/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- CEA-721.4 Generic Common Application Language Quality of Service Issued: EIA-721.4, 11-24-97 i Contents 1. INTRODUCTION.1 1.1 Quality-of-Service (QOS) .1 1.2
16、 Model of a Generic Network.1 2. NETWORK ADDRESSING.3 2.1 EHS Addressing3 2.2 EIA-600 Standard Addressing.3 2.3 EIB Group Addressing4 3. THE DISCOVERY PROCESS.4 3.1 Setting QOS Parameters4 3.2 Reading QOS Parameters5 4. QUALITY OF SERVICE PARAMETERS5 4.1 Layer 6 - Presentation5 4.2 Layer 5 - Session
17、.6 4.3 Layer 4 - Transport6 4.3.1 Message Segmentation.6 4.3.2 Error Management7 4.3.3 Layer 4 QOS Variables 7 4.4 Layer 3 - Network Layer .7 4.4.1 Flood versus Directory Routing.8 4.4.2 Allowed Media and Brouters .8 4.4.3 Network Layer QOS Parameters9 4.5 Layer 2 - Data Link Layer .10 4.5.1 Acknowl
18、edgments10 4.5.2 Include Source Address11 4.5.3 Packet Priority11 4.5.4 Service Class 11 4.5.5 Layer 3 QOS Parameters12 4.6 Device Addressing 13 4.7 Timing Parameters 13 5. SUMMARY OF RECOMMENDED QOS PARAMETERS.14 Copyright Consumer Electronics Association Provided by IHS under license with CEA Lice
19、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not fo
20、r Resale, 03/30/2007 20:58:15 MDTNo reproduction or networking permitted without license from IHS -,-,- EIA-721.4 Generic Common Application Language Quality of Service Specification 1. Introduction 1.1 Quality-of-Service (QOS) The specification for Generic CAL consists of an Application Layer conta
21、ining a command language and a Message Transfer Service Element. The specifications of the lower OSI layers are not within the scope of this standard. However, the services provided by the lower layers affect the performance and composition of messages issued from the Application Layer. These lower
22、layer service options are collectively called the Quality-of-Service (QOS) available from the communications protocol. This portion of the EIA-721 standard describes those lower layer QOS options that may impact the Application Layer. Recommended capabilities are specified. Also, a mechanism to conv
23、ey these options to the Generic CAL Application Layer using Layer System Management functions is presented. 1.2 Model of a Generic Network A Generic Network is any communications protocol implementation that includes Generic CAL and the associated Application Layer functions. The functions of the Ge
24、neric Network protocol are expected to be implemented in modules that enable devices to be connected to a local area network adapted for premises automation applications. Figure 1 illustrates the connection of devices to a shared-medium network. The Network Interface is responsible for translating b
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- CEA 721.4 1998
链接地址:https://www.31doc.com/p-3751855.html