1、 Problem Solvers to the Telecommunications Industry TECHNICAL REPORT T1.TR.67-2001 Technical Report on Capabilities and Requirements for Fixed Wireless for PSTN Access (FWPA) Prepared by T1P1.4 Working Group on Fixed Wireless for Public Switched Telephone Network Access (FWPA) Systems i 1.1 A WORD F
2、ROM ATIS AND COMMITTEE T1 Established in February 1984, Committee T1 develops technical standards, reports and requirements regarding interoperability of telecommunications networks at interfaces with end-user systems, carriers, information and enhanced-service providers, and customer premises equip
3、ment (CPE). Committee T1 is sponsored by ATIS and is accredited by ANSI. T1.TR.67-2001 Published by Alliance for Telecommunications Industry Solutions 1200 G Street, NW, Suite 500 Washington, DC 20005 Committee T1 is sponsored by the Alliance for Telecommunications Industry Solutions (ATIS) and accr
4、edited by the American National Standards Institute (ANSI). Copyright 2001 by Alliance for Telecommunications Industry Solutions All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the
5、 publisher. For information contact ATIS at 202.628.6380. ATIS is online at . Printed in the United States of America. T1.TR.67-2001 i T1.TR.67-2001 Capabilities and Requirements for Fixed Wireless for Public Switched Telephone Network (PSTN) Access (FWPA) Systems Abstract This document provides a T
6、echnical Report on the capabilities and requirements for Fixed Wireless for Public Switched Telephone Network (PSTN) Access (FWPA) Systems. This document includes a network reference model and system requirements at a Stage 1 level of detail. Prepared by T1P1.4 Working Group on Fixed Wireless for Pu
7、blic Switched Telephone Network Access (FWPA) Systems T1.TR.67-2001 ii Table of Contents 1 INTRODUCTION AND SCOPE.7 1.1 INTRODUCTION.7 1.2 SCOPE.7 2 REFERENCES 7 2.1 ACCESS SYSTEM DEFINITIONS, NETWORK INTERFACES, AND SERVICE CAPABILITY SPECIFICATIONS7 2.2 SPECIFIC SERVICE DEFINITIONS8 2.3 SAFETY AND
8、 ENVIRONMENTAL STANDARDS8 2.4 OTHER ITU RECOMMENDATIONS AND DOCUMENTS 9 2.5 T1 DOCUMENTS 10 3 DEFINITIONS AND ACRONYMS .10 3.1 DEFINITIONS10 3.2 LIST OF ACRONYMS .11 4 ARCHITECTURE 13 4.1 FIXED WIRELESS FOR PSTN ACCESS (FWPA) 13 4.2 FIXED WIRELESS FOR PSTN ACCESS ARCHITECTURE14 4.2.1 Single-Line Sub
9、scriber Architecture 15 4.2.2 Multiple-Line Subscriber Architecture (Optional) .15 4.2.3 Repeater Architecture (Optional).16 5 REFERENCE MODEL FOR FWPA 17 5.1 REFERENCE MODEL CAVEATS AND CONVENTIONS17 5.2 REFERENCE MODEL ELEMENT DESCRIPTIONS 17 5.3 INTERFACE DESCRIPTIONS.19 5.3.1 Abis19 5.3.2 Apacke
10、t19 5.3.3 Cfwa.19 5.3.4 Nfwa.19 5.3.5 Nfwap.19 5.3.6 Ofwa19 5.3.7 Tfwa.19 5.3.8 Ufwa.20 5.4 NETWORK ELEMENT DESCRIPTIONS .20 5.4.1 The Wireless Access Network Function (WANF) Description.20 5.4.1.1 FWA Controller (FWA-C) 20 T1.TR.67-2001 iii 5.4.1.2 FWA Network Transceiver (FWA-NT) 21 5.4.1.3 FWA Pa
11、cket Data Node (PDN). 21 The PDN provides:. 21 5.4.2 The Wireless Access Processing Repeater Function (WAPRF) Description21 5.4.3 The Wireless Access Subscriber Function (WASF) Description.22 5.4.4 Wireline Terminal (WlnT).23 5.4.5 Wireline Data Terminal (WlnDT)23 5.4.6 Element Manager Operations Sy
12、stem (OS) 23 5.4.7 Intelligent Network (IN) Element 23 5.4.8 Universal Identity Module (UIM) 23 6 REQUIREMENTS23 6.1 USER SERVICE REQUIREMENTS23 6.1.1 Basic Telecom Services 24 6.1.2 Supplementary Telecom Services.25 6.1.3 Centrex Business Services27 6.1.3.1 Voice Features 27 6.1.3.2 Centrex Dialing
13、 Plans . 27 6.1.3.3 Centrex End User Management . 27 6.1.3.4 Line Restrictions . 27 6.1.3.5 Authorization Codes . 27 6.1.3.6 Virtual Access to Private Networks. 28 6.1.3.7 Direct Inward Dialing (DID) . 28 6.1.4 PBX Systems.28 6.1.5 ISDN Services .28 6.1.6 Packet Services.28 6.1.7 Advanced Telecom Se
14、rvices .29 6.2 BEARER SERVICE REQUIREMENTS.29 6.2.1 Mandatory FWPA Circuit-Mode Bearer Capabilities29 6.2.1.1 Circuit-Mode, 64 Kb/s, 3.1 kHz Audio. 29 6.2.1.2 Circuit-Mode, 64 Kb/s, Unrestricted Digital Information 30 6.2.1.3 Circuit-Mode, 144 Kb/s, Unrestricted Digital Information 30 6.2.1.4 Circui
15、t-Mode, n x 64 Kb/s for n=2, Unrestricted Digital Information 31 6.2.2 Optional Circuit-Mode Bearer Capabilities.32 6.2.2.1 Circuit-Mode, Low Rate Speech . 32 6.2.2.2 Circuit-Mode, 32 Kb/s, Speech .32 6.2.2.3 Circuit-Mode, n x 64 Kb/s for n 2, Unrestricted Digital Information. 33 6.2.2.4 Fixed Wirel
16、ess Packet Access . 33 6.3 SPECIFIC WIRELESS SYSTEM REQUIREMENTS34 T1.TR.67-2001 iv 6.3.1 Signaling Applications34 6.3.2 FWPA Access Signaling Mechanisms.34 6.3.3 Registration/De-registration.35 6.3.4 Authentication 35 6.3.5 Privacy (Optional) 35 6.3.6 Availability35 6.3.7 Blocking Probability .35 6
17、.3.8 Lawfully Authorized Electronic Surveillance (LAES)35 6.3.9 OAM it merely provides several alternatives for wireless equipment manufacturers and service providers. In wired networks, telephone lines from central offices are grouped into cables, optical fibers or multiplexed onto single wire pair
18、s or optical fibers that run to the distribution points. This portion of the network is known as the feeder. From the feeder, they proceed as separate wires to the cross-connect point. This portion of the network is known as the distribution. From the distribution, they proceed as separate wires to
19、the premises. This point of the network is known as the drop. Wired local loop is shown in Figure 4-1. In Fixed Wireless for PSTN Access, the feeder, the distribution, the drop, or all three may be replaced by wireless. Depending on which portion is replaced, three local loop architectures are possi
20、ble. The architectures are Single-Line Subscriber, Multiple-Line Subscriber, or Repeater. These different architectures are described below. SwitchDistributionAnalogorISDNAnalogorISDNAnalogorISDNAnalogorISDNAnalog or ISDNDigital LoopCarrierRemoteFigure 4-1: Wired Local Loop Feeder Distribution Drop
21、T1.TR.67-2001 15 4.2.1 Single-Line Subscriber Architecture Network / PPDNWirelessAccessNetwork FunctionWirelessAccessSubscriberFunctionWirelessAccessSubscriberFunctionWirelessAccessSubscriberFunctionFigure 4-2: Single-Line Subscriber Architecture In the Single-Line Subscriber Architecture, shown in
22、Figure 4-2, the end office switch interfaces to the Wireless Access Network Function (WANF) through the appropriate interface. Each WANF covers a number of premises in a point-to-multi-point arrangement. The WANF performs multi-point distribution to subscriber units with exterior antennas and wired
23、drops into the subscriber premises. The air interface may use one or more multiple access channels (frequency channel, time slot, code, etc.) per subscriber to provide basic service, high-speed data, multiple-lines or other services. 4.2.2 Multiple-Line Subscriber Architecture (Optional) The Multipl
24、e-Line Subscriber Architecture, shown in Figure 4-3, has a wireless interface from the WANF to the WASF, but the WASF serves multiple premises or multiple line appearances within a single premises. Here the WASF may be mounted to a pole and wired drops connected from the WASF to the Network Interfac
25、e Units (NIUs) at the individual premises. Multiple-Line Subscriber Configuration can be used in combination with Single-Subscriber Architecture as shown in Figure 4-2. T1.TR.67-2001 16 Network /PPDNWirelessAccessNetwork FunctionWirelessAccessSubscriberFunctionWirelessAccessSubscriberFunctionWireles
26、sAccessSubscriberFunctionFigure 4-3: Multiple-Line Subscriber Architecture In this architecture, one Wireless Access Subscriber Function (WASF) can serve more than one subscriber and concentration may be performed at the WASF. The air interface configuration for this architecture may be identical to
27、 the air interface configuration for the Single-Line Subscriber Architecture or it may multiplex subscribers served by a single WASF onto one or more multiple access channels. In either case the air interface should efficiently use the spectrum. 4.2.3 Repeater Architecture (Optional) In order to exp
28、and the FWPA system coverage, a repeater architecture may be used. The Repeater Architecture, shown in Figure 4-4, has a wireless interface from the WANF to the Wireless Access Processing Repeater Function (WAPRF) and a wireless interface from the WAPRF to the WASF. The WAPRF is transparent to the W
29、ANF and the WASF. It may provide for concentration on the WASF side. In order to facilitate WASF operation in either repeatered or non-repeatered configurations, the radio link between the WANF and the WAPRF and the radio link between the WAPRF and the WASF should support the same air interface oper
30、ating on the same or different frequencies, time slots, or codes. T1.TR.67-2001 17 Network /PPDNWirelessAccessNetwork FunctionWirelessAccessSubscriberFunctionWirelessAccessSubscriberFunctionWirelessAccessSubscriberFunctionWireless AccessProcessingRepeater FunctionWirelessAccessSubscriberFunctionFigu
31、re 4-4: Repeater Architecture 5 REFERENCE MODEL FOR FWPA Fixed wireless access has evolved from several technologies: proprietary microwave systems, loop carrier systems, and cellular systems. This document deals only with fixed wireless systems based on a loop carrier PSTN access architecture. This
32、 architecture is a digital loop carrier design in which the FWA system is interconnected to the PSTN at an end office by standard line side interfaces (e.g., two-wire, TR-008, GR-303, V5.2). This reference model specifically requires that an FWA system interface to a local exchange switch for networ
33、k switching functions. 5.1 REFERENCE MODEL CAVEATS AND CONVENTIONS The reference model depicts a functional model and does not preclude integration of given functions into single or multiple physical units. The interfaces are identified using the subscript “fwa.” For example, the Nfwainterface may b
34、e analog 2-wire loop, TR-008, GR-303, V5.2, etc. 5.2 REFERENCE MODEL ELEMENT DESCRIPTIONS The reference model elements are depicted in . The FWPA reference model consists of the following three functional groups: The WANF, the WAPRF and the WASF. Four main interfaces provided by the WANF are: The in
35、terface to the local exchange switch and network features via standard open network interfaces Nfwa The interface to a packet data node in the PPDN and data features via standard open network interface Nfwap The interface to the network operations system (Ofwa) T1.TR.67-2001 18 The radio air interfa
36、ce(s) to the WASF or WAPRF (Ufwa) C N NETWORK FWA-C FWA-NTWANF A bisN U IN fwa OS NEOfwa FWA-ST WlnTIWASF WlnTTfwaUIM WlnDT T fwa PDN PPDN A packet fwap fwa fwa FWA-ST WlnTI WASF WlnTTfwa UIM WlnDTT fwa FWA- NPRT FWA-SPRT WAPRFU fwa U fwaFigure 5-1: Reference Model for a Fixed Wireless for PSTN Acce
37、ss System Reference Model Legend: FWA-C: Fixed Wireless Access Controller FWA-NPRT: Fixed Wireless Access Network Processing Repeater Transceiver FWA-NT: Fixed Wireless Access Network Transceiver FWA-SPRT: Fixed Wireless Access Subscriber Processing Repeater Transceiver FWA-ST: Fixed Wireless Access
38、 Subscriber Transceiver IN: Intelligent Network NE: Network Element OS: Operations System PDN: Packet Data Node PPDN: Public Packet Data Network PSTN: Public Switched Telephone Network UIM: User Identity Module WANF: Wireless Access Network Function WAPRF: Wireless Access Processing Repeater Functio
39、n WAS: Wireless Access System WASF: Wireless Access Subscriber Function WlnDT: Wireline Data Terminal WlnT: Wireline Terminal WlnTI: Wireline Terminal Interface Three main interfaces provided by the WAPRF are: The radio air interface(s) to the WANF (Ufwa) The radio air interface(s) to the WASF (Ufwa
40、) The interface to the remote operations system (Ofwa) Three main interfaces provided by the WASF are: T1.TR.67-2001 19 The interface to the user terminal device (Tfwa) The interface to the remote operations system (Ofwa) over the air interface The radio air interface(s) to the WANF or WAPRF (Ufwa)
41、5.3 INTERFACE DESCRIPTIONS The interfaces are depicted in the reference model by lines connecting reference model elements. 5.3.1 AbisThis is the interface between the controller and the FWA-NT. This interface is typically proprietary. 5.3.2 ApacketThis is the packet data interface between the FWA-C
42、 and the Packet Data Node. This interface may be proprietary or may use a standard protocol. 5.3.3 CfwaThis interface supports intelligent network (IN) functions or interfaces to IN. 5.3.4 NfwaThis interface provides an open interface between the public network and the FWPA system. This interface ca
43、n be any line side network standard for the access system reference model (e.g., 2 or 4-wire analog loop, GR-303, TR008, V5.2, etc.). The physical layer of this interface is not limited to copper wire; it could be fiber, point-to-point microwave, etc. 5.3.5 NfwapThis interface provides an open packe
44、t data interface between the Public Packet Data Network and the FWPA system. This interface can be any packet standard for the access system reference model (e.g. Ethernet or IP). The physical layer of this interface is not limited to copper wire; it could be fiber, point-to-point microwave, etc. 5.
45、3.6 OfwaThis is the Operations, Administration, Maintenance, and Provisioning (OAM the audible tone may be generated locally at the customer terminal or may come from the local exchange Pulse Dialing and DTMF signaling Forward Disconnect In-band DTMF support, e.g. control of answering machines and o
46、n-line services Operator services, including: o Toll and Assistance o Listing Services (including Directory Assistance (DA) and DA call completion) o Intercept Services (e.g. caller advisory via recorded announcement) o Busy Line Verification o Alternate Billing o Custom Information Public Safety or
47、 Mandated Features (Availability and implementation of these features may differ by jurisdiction) T1.TR.67-2001 25 Basic 911 E-911 Support the HPC IAM message for 710-NCS-GETS Support 710 area code and 710-NCS-GETS calls Lawfully Authorized Electronic Surveillance (see description in 6.3.8) TTY (ADA
48、 Compliance) Toll Services, including long distance, equal access, and wide area calling Location Services (if required by local regulation) 6.1.2 Supplementary Telecom Services Many wireline service providers offer supplementary telecom services to subscribers. These services are common to premises
49、 and business subscribers and provide increased convenience and control. These services are calling features described in SR 504. Supplementary Telecom Services supported by the FWPA system shall operate in the same manner and produce the same audible and visual indicators as in wired network that the FWPA system serves. These supplemental telecom services are optional and may include but are not limited to: Added Directory Number: A single telephone line can support more than one telephone number. Dis
