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    TIA TSB108-1999 Implementation Aspects of R-DATA Encryption in TIA EIA-136《TIA EIA-136中R-DATA加密的执行方面》.pdf

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    TIA TSB108-1999 Implementation Aspects of R-DATA Encryption in TIA EIA-136《TIA EIA-136中R-DATA加密的执行方面》.pdf

    1、TIA/EIA TELECOMMUNICATIONS SYSTEMS BULLETIN Implementation Aspects of R-DATA Encryption in TIA/EIA-136 TSBlOS MARCH 1999 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Elactron k Industries Allia ncc STD-EIA TSBLOB-ENGL L997 m 3234bU0 Ub44748 453 Wl NOTICE WEIA Engineering Standards and Publications are de

    2、signed 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 minimum delay the proper product for his particular need. Existence

    3、 of such Standards and Publications shall not in any respect preclude any member or nonmember of WEIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than

    4、TIA/EIA members, whether the standard is to be used either domestically or internationally. Standards, Publications and Bulletins are adopted by EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, “/ETA does not assume any liability to any patent ow

    5、ner, nor does it assume any obligation whatever to parties adopting the Standard, Publication, or Bulletin. Technical Bulletins are distinguished from WEIA Standards or Interim Standards, in that they contain a compilation of engineering data or information useful to the technical community, and rep

    6、resent approaches to good engineering practices that are suggested by the fomulatjng 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 have been accepted by, appropriate bodies. Par

    7、ties 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 revise and update this Bulletin from time to time as may be occasione

    8、d by changes in technology, industry practice, or government regulations, or for other appropriate reasons. (From Project No. 4382, formulated under the cognizance of the TIA TR-45.3 Subcommittee on Time Division Digital Technology). Published by 14c TELECOMMUNICATIONS INDUSTRY ASSOCIATION 1999 Stan

    9、dards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE: Please refer to the current Catalog of EIA, JEDEC and TIA STANDARDS and ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) International (303-397-7956) All rights reserved Pri

    10、nted in U.S.A. TSB-108 Implementation Aspects of R-DATA Encryption in TINEIA-1 36 o Table of Contents 1 1. STATEMENT OF PROBLEM 1 2 2. PROPOSED SOLUTION . 1 3 STD.EIA TSBLOB-ENGL L177 M 323qb00 Ob44750 001 E O 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 18 19 P 21 ?2 23 24 25 26 27 28 TSB-108 Implemen

    11、tation Aspects of R-DATA Encryption in TINEIA-1 36 1 Statement of Problem Appendix-A allows for encryption of R-DATA only if the TeleService ID indicates Over-the-Air Activation (See TIA-EIA-136-720). Consequently, even if message encryption is enabled, a receiver must be prepared to deal with R-DAT

    12、A messages that may or may not be encrypted depending on content. For the first slot of a multi-slot message (Continuation Flag = O) all fields except the Message Type are encrypted. This results in the Teleservice ID being encrypted, effectively hiding the reason for encryption, and making it diffi

    13、cult for receivers to reliably identify the teleservice canied in R-DATA messages. This document provides a mechanism that provides for reliable identification of the teleservice contained in an R-DATA message by restricting the transmission mode used for encrypted R-DATA messages. 2. Proposed Solut

    14、ion In order to reliably support encrypted transmission of R-DATA messages, both the mobile station (MS) and the base station (BS) shall use ARQ mode transmission on the Digital Traffic Channel (DTC) (see TIA/EIA-136- 133) when sending encrypted R-DATA messages, and may use either ARQ or non-ARQ mod

    15、es when sending unencrypted R- DATA messages. On the Digital Traffic Channel, each ARQ BEGIN and ARQ CONTINUE message contains an Encryption Indicator (EI) that indicates whether or not an ARQ Mode frame is encrypted. If signaling message encryption is enabled, and the TeleService ID indicates Over- the-Air Activation, then for all ARQ frames that constitute the R-DATA message, the EI bit shall be set to 1. This indicates that the layer 3 information in the frame is encrypted according to Appendix-A. 1


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