TIA/EIA/IS-95-A + TSB74
Mobile Station-Base Station Compatibility
Standard for Dual-Mode Wideband Spread
Spectrum Cellular System
Telecommunications Systems Bulletin: Support for 14.4 kbps Data Rate and PCS Interaction for Wideband Spread Spectrum Cellular Systems
February 27, 1996
File Names: 95A+74/FM,C1-5;06
? 1996 TIA.
IS-95-A + TSB74 Baseline Version Page i
2 These technical requirements form a compatibility standard for cellular mobile telecom-3 munications systems. They ensure that a mobile station can obtain service in any 4 cellular system manufactured according to this standard. These requirements do not 5 address the quality or reliability of that service, nor do they cover equipment performance 6 or measurement procedures.
7 To ensure compatibility (see Note 1), both radio-system parameters and call-processing 8 procedures must be specified. The equipment and interface parameters commonly 9 encountered in two-way radio systems have been updated and expanded to reflect the 10 unique radio plan upon which cellular systems are based. The sequence of call-11 processing steps that the dual-mode mobile stations and base stations execute to 12 establish calls has been specified along with the digital control messages and analog 13 signals that are exchanged between the two stations.
14 The base station is subject to fewer compatibility requirements than the dual-mode mobile 15 station. Radiated power levels, both desired and undesired, are fully specified for dual-16 mode mobile stations to control the RF interference that one mobile station can cause 17 another. Base stations are fixed in location and their interference is controlled by proper 18 layout and operation of the system in which the station operates. Detailed call-19 processing procedures are specified for mobile stations to ensure a uniform response to all 20 base stations. Base station call procedures are not specified in detail because they are a 21 part of the overall design of the individual land system. However, the base station call-22 processing procedures must be compatible with those specified for the mobile station. 23 This approach to writing the compatibility specification provides the land system designer 24 with sufficient flexibility to respond to local service needs and to account for local 25 topography and propagation conditions.
26 The basic radio-system parameters and call-processing procedures for the analog mode of 27 operation embodied in the compatibility specification were originally derived from the 28 Chicago and Baltimore-Washington developmental cellular systems and include certain 29 additions and modifications gained by experience with the operation of commercial 30 systems.
31 The basic radio-system parameters and call-processing procedures for the wideband 32 spread spectrum (CDMA) mode of operation embodied in the compatibility specification 33 were originally derived from the San Diego developmental cellular system. Most 34 functions have been verified by field trial.
35 This specification includes provisions for future service additions and expansion of system 36 capabilities. The architecture defined by this specification permits such expansion 37 without the loss of backwards compatibility to older mobile stations.
Page ii Baseline Version IS-95-A + TSB74
1 SECTION SUMMARY
2 1. General. This section defines the terms and numeric indications used in this 3 document. This section also describes the time reference used in the CDMA system and 4 the tolerances used throughout the document.
5 2. Requirements for Mobile Station Analog Operation. This section describes the
6 requirements for CDMA-analog dual-mode mobile stations operating in the analog mode. 7 A mobile station complying with these requirements will be able to operate with analog 8 base stations complying with this document and should be able to operate with analog 9 base stations complying with EIA/TIA-553, EIA/TIA/IS-54, and TIA/EIA/IS-91.
10 3. Requirements for Base Station Analog Operation. This section describes the
11 requirements for analog base stations. A base station complying with these requirements 12 will be able to operate in the analog mode with mobile stations complying with this 13 document and should be able to operate in the analog mode with mobile stations 14 complying with EIA/TIA-553, EIA/TIA/IS-54, and TIA/EIA/IS-91.
15 4. Requirements for Mobile Station Analog Options. This section describes the
16 requirements for CDMA-analog dual-mode mobile stations which use the 32-digit dialing 17 option on the reverse analog control channel. In addition, this section describes mobile 18 station requirements for use of the optional extended protocol.
19 5. Requirements for Base Station Analog Options. This section describes the base
20 station requirements for using the 32-digit dialing option on the reverse analog control 21 channel. In addition, this section describes base station requirements for use of the 22 optional extended protocol.
23 6. Requirements for Mobile Station CDMA Operation. This section describes the
24 requirements for CDMA-analog dual-mode mobile stations operating in the CDMA mode. 25 A mobile station complying with these requirements will be able to operate with CDMA 26 base stations complying with this document.
27 7. Requirements for Base Station CDMA Operation. This section describes the
28 requirements for CDMA base stations. A base station complying with these requirements 29 will be able to operate in the CDMA mode with mobile stations complying with this 30 document.
31 Appendix A. Message Encryption and Voice Privacy. This appendix describes the
32 requirements for message encryption and voice privacy. This appendix is available as a 33 separate document whose distribution is controlled by TIA. The availability of this 34 appendix is governed under the U.S. International Traffic and Arms Regulation (ITAR) and 35 the Export Administration Regulations.
36 Appendix B. CDMA Call Flow Examples. This appendix provides examples of simple
37 call flow in the CDMA system.
38 Appendix C. CDMA System Layering. This appendix describes the layers of the CDMA
39 system: the physical layer (layer 1), the link layer (layer 2), the multiplex sublayer, and 40 the control process layer (layer 3).
IS-95-A + TSB74 Baseline Version Page iii
1 SECTION SUMMARY
2 Appendix D. CDMA Constants. This appendix contains tables that give specific values 3 for the constant identifiers found in Section 6 and Section 7. These identifiers take the 4 forms T and N. The subscripted numbers vary to identify the particular constant. 20m5m
5 Appendix E. CDMA Retrievable and Settable Parameters. This appendix describes
6 the mobile station parameters that the base station can set and retrieve. 7 Appendix F. Mobile Station Database. This appendix describes a database model that 8 can be used for dual-mode mobile stations complying with this document. 9 Appendix G. Bibliography. This is an informative appendix (not considered part of this 10 standard) listing documents which may be useful in implementing the standard. 11
Page iv Baseline Version IS-95-A + TSB74
2 1. Compatibility, as used in connection with this standard, is understood to mean: 3 Any dual-mode mobile station that is able to place and receive calls in any cellular 4 system. Conversely all systems are able to place and receive calls for any mobile 5 station. In a subscriber‘s home system, all call placement must be automatic. 6 Call placement preferably should be automatic when a mobile station is in roam 7 status.
8 2. The term ―dual-mode mobile station‖ indicates a mobile station capable of both 9 analog (FM) and wideband spread spectrum (CDMA) operation. The term 10 ―wideband spread spectrum dual-mode mobile station‖ is used when a confusion
11 might arise between a dual-mode mobile station complying with this document 12 and other standards such as TIA/EIA/IS-91 or EIA/TIA/IS-54.
13 3. This compatibility specification is based on the specific United States spectrum 14 allocation for cellular systems.
15 4. Technical details are included for the operation of two systems in a geographic 16 area, System A and System B, each with a separate set of control channels. 17 5. IS-98 ―Recommended Minimum Performance Standards for Dual-Mode Wideband
18 Spread Spectrum Cellular Mobile Stations,‖ and IS-97 ―Recommended Minimum
19 Performance Standards for Base Stations Supporting Dual-Mode Wideband 20 Spread Spectrum Cellular Mobile Stations,‖ provide specifications and 21 measurement methods for cellular equipment.
22 6. Each cellular system is identified by a unique 15-bit digital code, the SID code 23 (see 2.3.8). The Federal Communications Commission assigns SID codes when 24 cellular system construction permits are issued.
25 7. Each dual-mode mobile station is assigned a unique 32-bit binary serial number 26 (ESN) which cannot be changed by the subscriber without rendering the mobile 27 station inoperative (see 2.3.2).
28 8. Reserved.
29 9. Reserved.
30 10. RF Emissions. Minimum advisory standards of ANSI and the processing guide-31 lines of FCC are contained in ANSI C95.1-1982 Advisory Standards and FCC 32 Rules and Regulations respectively. Members should also take notice of the more 33 stringent exposure criteria for the general public and for radio frequency carriers 34 with low frequency amplitude modulation as given in NCRP Report No. 86. 35 11. For the optional analog extended protocol feature (see 4.2 and 5.2), the 36 assignment of message type codes (MST words) will be made using procedures 37 described in TSB39. This will ensure that the feature will be implemented in an 38 orderly manner.
IS-95-A + TSB74 Baseline Version Page v
2 12. Reserved.
3 13. The allocation of SID numbers is under review by EIA/TIA TR45 for potential 4 revision to accommodate international requirements. Utilization of SID numbers 5 must be coordinated.
6 14. Although the analog mode of operation (Sections 2, 3, 4, and 5) draws upon 7 EIA/TIA/IS-54-B, some modifications have been made.
8 15.；―Base station‖ refers to the functions performed on the land side, which are
9 typically distributed among a cell, a sector of a cell, and a mobile switching center.；
10 16. Section 6, Section 7, and the appendices use the following verbal forms: ―Shall‖ 11 and ―shall not‖ identify requirements to be followed strictly to conform to the
12 standard and from which no deviation is permitted. ―Should‖ and ―should not‖ 13 indicate that one of several possibilities is recommended as particularly suitable, 14 without mentioning or excluding others; that a certain course of action is 15 preferred but not necessarily required; or that (in the negative form) a certain 16 possibility or course of action is discouraged but not prohibited. ―May‖ and ―need 17 not‖ indicate a course of action permissible within the limits of the standard.
18 ―Can‖ and ―cannot‖ are used for statements of possibility and capability, whether 19 material, physical, or causal.
20 17. Footnotes appear at various points in this specification to elaborate and further 21 clarify items discussed in the body of the specification.
22 18. Unless indicated otherwise, this document presents numbers in decimal form. 23 Binary numbers are distinguished in the text by the use of single quotation marks. 24 19. The following operators define mathematical operations:
25 ， indicates multiplication.
26 ；x： indicates the largest integer less than or equal to x: ；1.1： = 1, ；1.0： = 1.
27 ；(x！ indicates the smallest integer greater or equal to x: (1.1！ = 2, (2.0！ = 2.
28 |x| indicates the absolute value of x: |-17|=17, |17|=17.；
29 ；？ indicates exclusive OR (modulo-2 addition).
30 min (x, y) indicates the minimum of x and y.
31 max (x, y) indicates the maximum of x and y.
32 x mod y indicates the remainder after dividing x by y: x mod y = x - (y ，；；；x/y：).
Page vi Baseline Version IS-95-A + TSB74
2 20. A potential compatibility problem between ANSI/EIA/TIA-553 and IS-95 exists as 3 a result of differences in access channel boundary determination procedures 4 supported in these two standards. Recommended solutions to this potential 5 compatibility problem are as follows:
6 Preferred Solution
7 Section 2.3.7 (First Paging Channel) specifies the first paging channels 8 (FIRSTCHP) which must be stored in an IS-95 mobile station and used to identify p
9 the first paging channel in paging channel scans when the mobile station is 10 operating in its home system. Defaulting this value to the preferred system‘s (i.e., 11 A or B band) first dedicated control channel (834.990 MHz/879.990 MHz and 12 835.020 MHz/880.020 MHz respectively) will prevent paging/access channels 13 from being calculated differently when the IS-95 mobile station operates on an 14 EIA-553 based home system. This solution is used today and should continue to 15 be used to ensure full interoperability of EIA-553 and IS-95 mobile stations on 16 both EIA-553 and IS-95 type systems. This solution does, however, require that 17 both home and roaming IS-95 mobile stations use the same paging channel set 18 (i.e., no split home-roam paging channels).
19 Non-Preferred Solution
20 If a second portion of the existing spectrum is allocated for control channel use 21 (over and above the dedicated control channels) then split home-roam paging can 22 still be achieved for both IS-54B and EIA-553 mobile stations. This second 23 portion of spectrum could be managed as follows:
24 • Used exclusively by home IS-95 mobile stations, having appropriate NAM 25 programming, for both paging and access functions or,
26 • Used by home IS-95 mobile stations, having appropriate NAM programming, for 27 both paging and access functions and by home EIA-553 mobile stations, having 28 appropriate NAM programming, for paging functions only. Home EIA-553 29 mobile stations would continue to use the existing dedicated control channels 30 for access functions.
31 21. Forward control channel mobile station control messages of greater than five 32 words in length have been shown to yield compatibility problems in some mobile 33 stations. Implementors of systems are advised that the functions performed by 34 these optional messages may be achieved on assigned voice channels without 35 causing compatibility issues. Mobile station manufacturers are advised that the 36 length of forward control channel messages defined in future standards may be 37 different from that defined in this standard.
38 22. Those wishing to deploy systems compliant with this standard should also take 39 notice of the requirement to be compliant with FCC part 22, and the referenced 40 version of FCC Office of Engineering and Technology Bulletin 53. 41
IS-95-A + TSB74 Baseline Version Page vii
2 The following standards contain provisions which, through reference in this text, 3 constitute provisions of this Standard. At the time of publication, the editions indicated 4 were valid. All standards are subject to revision, and parties to agreements based on this 5 Standard are encouraged to investigate the possibility of applying the most recent editions 6 of the standards indicated below. ANSI and TIA maintain registers of currently valid 7 national standards published by them.
9 —American National Standards:
10 1. ANSI T1.607-1990, Integrated Services Digital Network (ISDN)–Layer 3 Signaling
11 Specification for Circuit Switched Bearer Service for Digital Subscriber Signaling 12 System Number 1 (DSS1), July 1990.
13 2. ANSI X3.4-1986, Coded Character Set - 7-bit American National Standard Code for 14 Information Interchange, 1992.
15 3. ANSI J-STD-008-1995, Personal Station-Base Station Compatibility Requirements for 16 1.8 to 2.0 GHz Code Division Mulitple Access (CDMA) Personal Communications 17 Systems, 1995.
18 —Other Standards:
19 4. Common Cryptographic Algorithms. An ITAR controlled document subject to
20 restricted distribution. Contact the Telecommunications Industry Association, 21 Washington, D.C., December 14, 1994.
22 5. CCITT Recommendation E.163, Numbering Plan for the International Telephone 23 Service, 1988. Note: merged with E.164.
24 6. CCITT Recommendation E.164 (I.331), Numbering Plan for the ISDN Era, 1991.
25 7. CCITT Recommendation E.212, Identification Plan for Land Mobile Stations, 1988.
26 8. CCITT Recommendation F.69, The International Telex Service–Service and
27 Operational Provisions of Telex Destination Codes and Telex Network Identifications 28 Codes, 1994.
29 9. CCITT Recommendation G.162, Characteristics of Compandors for Telephony.
30 10. CCITT Recommendation X.121, International Numbering Plan for Public Data
31 Networks, 1992.
32 11. IEEE Standard 661-1979, Method for Determining Objective Loudness Ratings of 33 Telephone Connections, 1979.
34 12. Interface Specification for Common Cryptographic Algorithms, Rev A. Contact the
35 Telecommunications Industry Association, Washington, D.C., December 14, 1994. 36 13. TIA/EIA/IS-97, Recommended Minimum Performance Standards for Base Stations 37 Supporting Dual-Mode Wideband Spread Spectrum Cellular Mobile Stations,
38 December 1994.
Page viii Baseline Version IS-95-A + TSB74
2 14. TIA/EIA/IS-98, Recommended Minimum Performance Standards for Dual-Mode 3 Wideband Spread Spectrum Cellular Mobile Stations, December 1994.
4 15. TIA/EIA/IS-95-A, Appendix A, Message Encryption and Voice Privacy. An ITAR
5 controlled document subject to restricted distribution. Contact the 6 Telecommunications Industry Association, Washington, D.C., November 16, 1994. 7 16. TSB16, Assignment of Access Overload Classes in the Cellular Telecommunications 8 Services, March 1985.
9 17. TSB29-A, International Implementation of Cellular Radiotelephone Systems 10 Compliant with ANSI/EIA/TIA-553, September 1992.
11 18. TSB39-A, Message Type Assignments for the Extended Protocol Facility of 12 ANSI/EIA/TIA-553, EIA/TIA/IS-54, TIA/EIA/IS-88 and TIA/EIA/IS-95, October
14 19. TSB50, User Interface for Authentication Key Entry, March 1993.
15 20. TSB58, Administration of Parameter Value Assignments for TIA/EIA Wideband 16 Spread Spectrum Standards,