1、TIA TELECOMMUNICATIONS SYSTEMS BULLETIN Cellular Digital Packet Data System Specification - Part 1020 CDPD Domain Name System TSB-87- 1020 Reaffirmed August 9,2002 ODECEMBER 1997 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Teleconmiunications Industry Association represents the conmiunications secto
2、r of NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimu
3、m delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Pu
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6、on useful to the technical community, and represent approaches to good engineering practices that are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage other approaches that similarly represent good engineering practice, or that may be acceptable to, or
7、have been accepted by, appropriate bodies. Parties who wish to bring other approaches to the attention of the formulating committee to be considered for inclusion in future revisions of this Bulletin are encouraged to do so. It is the intention of the formulating committee to review this document ev
8、ery five years, but it maybe revised and updated at any time as may be occasioned by changes in technology, industry practice, or government regulations, or for other appropriate reasons. (From Project No. 3-4008, formulated under the cognizance of the TIA TR-45.6 Subcommittee on Adjunct Wireless Pa
9、cket Data Technology.) This Document was reaffirmed by the Telecommunications Industry Association on August 9,2002. Published by OTELECOMMUNICATIONS INDUSTRY ASSOCIATION 1997 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 U.S.A. PRICE: Please refer to current Catalog
10、of TIA TELECOMMUNICATIONS INDUSTRY ASSOCIATION STANDARDS AND ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1 -800-854-7 179) International (303-397-7956) or search online at http:/www.tiaonline.org/standards/search-n-order .ch All rights reserved Printed in U.S.A. NO
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20、cification - Part 1020 I TSB87-1020 DECEMBER 1997 TELECOMMUNICATIONS INDUSTRY ASSOCIATION NOTICE WEIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and impro
21、vement of products, and assisting the purchaser in selecting and obtaining with minunurn delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TIA/EIA from manufacturing or selling products not conf
22、orming to such Standards and hiblications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TIA/= members, whether the standard is to be used either domestically or internationally. Standards, Publications and Buletins are adopted by EU in a
23、ccordance with the American National Standards Institute (ANSI) patent policy. By such action, WEIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, hiblication, or Bulletin. Technical Bulletins are distinguished from WEI
24、A Standards or Interim Standards, in that they contain a compilation of engineering data or information useful to the technical community, and represent approaches to good engineering practices that are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage o
25、ther approaches that similarly represent good engineering practice, or that may be acceptable to, or have been accepted by, appropriate bodies. Parties who wish to bring other approaches to the attention of the formulating committee to be considered for inclusion in future revisions of this Bulletin
26、 are encouraged to do so. It is the intention of the formulating committee to revise and update this Bulletin from time to time as may be occasioned by changes in technology, industry practice, or government regulations, or for other appropriate reasons. (From Roject No. 4008, formulated under the c
27、ognizance of the TIA TR-45.6 Adjunct Wireless Packet Data Standards Subcommittee) Published by -COMMUNICATIONS INDUSTRY ASSOCIATION 1997 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE Please refer to the current Catalog of EIA, JEDEC and TIA STANDARDS and ENGINEE
28、RING PUBLICATIONS International (303-397-7956) or call Global Engineering Documents, USA and Canada (1-800-854-7179) AU rights reserved Printed in U.S.A. . TIAIEINTSB-87-1020 PART 1020 Table of Contents O Foreword 1020-iii 0.1 Document Structure .lo2 0.111 . 1 Introduction 1020-1 1.1 Overview of CDP
29、D Domain Name System 1020-2 2 CDPD DNS Communications Profile 1020-3 3 CDPD DNS Domain Name Space . 1020-4 4 CDPD DNS Name Servers 1020-5 5 CDPD DNS Resolvers 1020-5 . 1020-i STJJ-EIA TSB87-2020-ENGL 1777 3234L00 ab01440 045 E Foreword TIAIEIAKSB-87-1020 PART 1020 CDPD Domain Name System O Foreword
30、This foreword is not part of this Telecommunications Systems Bulletin. This Telecommunications Systems Bulletin has been developed by Subcommittee TR-45.6, and contains information which may be useful to implementors of systems compliant with TSB-87, “Cellular Digital Packet Data System Specificatio
31、n,“ or its derivatives. This document contains significant portions of material originally submitted by the Cellular Digital Packet Data Forum Inc. CDPD is a technology intended to provide packet data networking services to mobile hosts. The media used to provide these services consists of radio cha
32、nnels typically used for Advanced Mobile Phone System (AMPS) cellular service. o. 1 Document Structure This Telecommunications Systems Bulletin is published as a series of Parrs. Each Part contains information pertaining to one aspect of the system. The functional structure of this TSB is as follows
33、: O Part 1000 to Part 1999-Guidelines for Service Providers These Parts are informative and discuss non-CDPD specific entities (such as Intermediate Systems), support services (such as directory - 102o-iii Previous page is blank TIAIEIAKSB-87-1020 CDPD Domain Name System services, accounting summary
34、 and settlement procedures, authentication, etc.), value-added services (such as subscriber location) and Service Provider issues (such as an interoperability test plan overview and parameter configuration). Part 1000 contains the detailed listing of all Parts of this TSB. Part 2000 to Part 2999-Gui
35、delines for Manufacturers of CDPD equipment These Parts are informative and discuss such concerns as CDPD-specific entities (such as Mobile End Systems (M-ESs), Mobile Data Base Stations (MDBSs) and Mobile Data Intermediate Systems (MD-ISS) , external interfaces (such as that between the Subscriber
36、Unit (SU) and the Subscriber Identity Module (SIM) and multicasts from the perspective of each of the participating entities. Part 3000 to Part 3999-Guidelines for the CDPD Network Information Center (NIC). These Parts are informative and describe the issues and procedures which must be addressed by
37、 an agency serving as a NIC on behalf of the CDPD community. e e Introduction TIAEIAflSB-87-1020 PART 1020 CDPD Domain Name System 1 I n t rod uct ion This Part is directed toward CDPD Service Providers and manufacturers intending to build equipment for use in the CDPD internal network. This Part ma
38、y impact CDPD subscribers and Mobile End System (h4-ESs) manufacturers. Applications within M-ESs often communicate with applications in Fixed End Systems (F-ESs) utilizing the CDPD Network as a communications backbone. One of the application services that the CDPD Network should provide is the CDPD
39、 Domain Name System (DNS), which is based on the Internet DNS. Use of CDPD DNS by subscribers is entirely optional. CDPD DNS is consistent with the IAB Standards RFC. This RFC recommends the use of the following RFCs for host implementations: e e e RFC-10341, Domain Names - Concepts and Facilities R
40、FC-10351, Domain Names - Implementation and Specification RFC-974, Mail Routing md the Domain Name system. 1. As of this writing (RFC-13601 is the IAB Standards RFC. - 1020-1 TlAEI“rSB-87-1020 CDPD Domain Name System Implementations of the CDPD DNS name servers and resolvers (described below) in the
41、 CDPD Network shall use the Internet suite of protocols defined in IS-732-3111, 1.1 Overview of CDPD Domain Name System CDPD DNS is based on the Internet DNS. This section provides a summary of DNS as it relates to the CDPD Network. DNS is a distributed, network-wide database system that provides tr
42、anslation between host names and addresses (and vice versa) in the CDPD Network using the Internet suite of protocols. DNS allows humans and applications to use names formed from text, rather than addresses formed from numbers. Use of CDPD DNS by a subscriber of the CDPD Network is optional and depe
43、nds upon whether or not the subscriber can derive benefit from its use. DNS consists of three major architectural components: o Domain name space o Resolvers o Name servers. The domain name space maintained by DNS is organized as an unbalanced tree whose internal nodes are known as domains and whose
44、 leaf nodes represent individual hosts. Users of DNS employ a convention that separates nodes by periods from left to right, from the most specific (lea to the most general (root or top of the naming tree). The name . is an example of a fully qualified domain name. The trailing period is often omitt
45、ed but serves to indicate that the name under consideration is in fact fully qualified (to the root) and not relative to any lower internal node. The domain name space is divided into zones, which are simply portions of the naming tree beginning at a particular node and encompassing all successors o
46、f that node. Zones allow organizations to have complete administrative authority over their portions of the domain name space, including the ability to delegate authority for nodes below the highest or top node of the zone. DNS was designed primarily to perform translation from fully qualified domai
47、n names to IP addresses. DNS is also used to distribute information about host hardware, operating system configurations, and electronic mail exchanger addresses. DNS functions as an application layer protocol implemented as a client- server model. On the client side, DNS is implemented through a re
48、solver, which is usually a part of any application that needs to know the IP addresses of hosts. On the server side, DNS is implemented as name servers in the network which respond to requests from client resolvers. Name 1020-2 TIAIEIAfrSB-87-1020 - CDPD DNC Communications Profile - servers are dist
49、ributed in the network and replicate information to prevent single points of failure. Each resolver must know, a priori, the address of at least one name server. DNS Resolver I RFC-10351 Further DNS information can be found in Part 3010. DNS Name Server RFC-10351 2 CDPD DNS Communications Profile CDPD DNS uses the CPDP Internet CLTS-CLNS Subprofile IS-732-31 i for resolver and name server implementations as shown in Figure 1020-1. FIGURE 1020-1 CDPD Internet CLTC-CLNC Subprofile Internet ctionless Transport S II I 1 User Datagram Protocol Il RFC-7681 T
