1、 TSB-5018 July 2016Structured Cabling Infrastructure Guidelines to Support Distributed Antenna Systems NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeabili
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19、ITHOUT SUCH LIMITATIONS. TIA TSB-5018 i Structured Cabling Infrastructure Guidelines to support Distributed Antenna Systems Table of Contents 1 SCOPE 1 2 REFERENCES 1 3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE . 1 3.1 General 1 3.2 Definitions 1 3.3 Acronyms and abbreviation
20、s 2 3.4 Units of measure 2 4 GENERAL . 3 5 COORDINATION WITH WIRELESS SERVICE PROVIDERS . 3 6 DAS CABLING DESIGN 3 6.1 Wireless coverage assessment 4 6.1.1 General . 4 6.1.2 Assessment 5 6.2 Grid Approach 5 6.2.1 General . 5 6.2.2 Uniform cell size . 6 6.3 DAS network topology . 8 6.3.1 General . 8
21、6.4 Active DAS cabling topology 8 6.5 Passive DAS cabling topology 15 7 MEDIA . 16 7.1 Cabling Subsystems 1, 2, and 3 16 7.2 Antenna cable .17 8 SUPPORTED APPLICATIONS 17 9 TESTING . 17 Annex A Bibliography . 18 TIA TSB-5018 ii List of Figures Figure 1: RF “heat map“ imposed on target building 5 Fig
22、ure 2: Example using uniform DAS cell size using balanced twisted-pair cabling 7 Figure 3: DAS overview with multiple input signals 8 Figure 4: Active DAS, Cabling Subsystem 1 9 Figure 5: Active DAS, Cabling Subsystem 2 .10 Figure 6: Active DAS, Cabling Subsystem 3 .11 Figure 7: Active DAS with opti
23、cal fiber cabling 12 Figure 8: Active DAS with balanced twisted-pair cabling .13 Figure 9: Active DAS with balanced twisted-pair cabling in the horizontal and optical fiber cabling in the backbone 14 Figure 10: Complete passive DAS with coaxial cabling for all Cabling subsystems .15 Figure 11: Passi
24、ve DAS cabling variants.16 TIA TSB-5018 iii FOREWORD (This foreword is not part of the TSB) This Telecommunications Systems Bulletin (TSB) was developed by TIA Subcommittee TR-42.1. Approval of this TSB This TSB was approved by TIA Subcommittee TR-42.1 and TIA Engineering Committee TR-42. Contributi
25、ng organizations More than 30 organizations within the telecommunications industry (including manufacturers, consultants, end users, and other organizations) contributed their expertise to the development of this TSB. Annex There is one annex to this TSB. Annex A is informative and not part of this
26、TSB. Introduction The purpose of this TSB is to facilitate the design, planning, installation, and testing of a cabling infrastructure to support both radio enhancement systems (RES) and cellular communications through a distributed antenna system (DAS). A significant number of fire jurisdictions in
27、 North America have adopted standards for public-safety RES to ensure adequate in-building radio coverage for public-safety personnel during situations requiring emergency personnel to respond. The diversity of services currently availa-ble, coupled with the continual addition of new services, may r
28、esult in cases where limitations to desired performance occur. Additionally, building components can act as a barrier for cellular communication. Therefore, a DAS is recommended to increase the signal strength into the building for public-safety, facility operations and personal communications. When
29、 supporting specific applications over the DAS, the user is cautioned to consult application standards, regulations, equipment vendors, and system and service suppliers for applicability, limitations, and ancillary requirements. A critical factor in successful DAS design and deployment is the radio
30、frequency (RF) design aspect of the system. Unlike a completely wired network, a wireless network contains at least one RF link in place of a wired link, allowing users and devices to move about untethered while maintaining uninterrupted communications. Proper RF design will determine the optimum pl
31、acement of DAS antennas to achieve the desired reception by user devices. Antenna place-ment drives the quantity and physical location of cables and media converters (if used), espe-cially in the horizontal part of the network. RF design is also usually dependent on DAS equip-ment choices and the fr
32、equencies to be supported. Building floor plans and construction materi-als (e.g., number of walls, thickness and material composition that the signal has to penetrate) should be considered to ensure proper performance. A qualified RF Design Engineer should be consulted for help in determining the p
33、roper placement of antennas prior to designing the ca-bling infrastructure. Additional factors that should be considered include: Carrier-specific requirements with regard to capacity and coverage, such as the number of channels and sectors to be used, which impacts density of antennas, equipment sp
34、ace and cabling requirements. Antenna (e.g., directional and omni-directional) are a potentially visible part of the net-work; therefore, in addition to performance, aesthetic aspects should be considered. Neutral Host Applications (i.e. supporting multiple carriers) may require additional space and
35、 cabling. TIA TSB-5018 iv Stewardship Telecommunications infrastructure affects raw material consumption. The infrastructure design and installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects of telecommunications infrastructure impact
36、our environment. Since building life cycles are typically planned for decades, technological electronic equipment up-grades are necessary. The telecommunications infrastructure design and installation process magnifies the need for sustainable infrastructures with respect to building life, electroni
37、c equip-ment life cycling and considerations of effects on environmental waste. Telecommunications designers are encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as part of the design process. Metric equivalents of United States customary
38、 units The dimensions in this TSB are metric or United States customary with approximate conver-sions to the other. Life of this TSB This TSB is a living document. The criteria contained in this TSB are subject to revisions and updating as warranted by advances in building construction techniques an
39、d telecommunications technology. Telecommunications cabling system structure This standard establishes a structure for DAS cabling based on the generic cabling system structure in ANSI/TIA-568.0-D. The elements of a DAS cabling system structure can include: Cabling Subsystem 1, Cabling Subsystem 2 a
40、nd Cabling Subsystem 3 Antenna cables Coverage area (space containing the antennas) Telecommunications room (TR) or common telecommunications room (CTR) (space containing Distributor A, Distributor B, or Distributor C) Equipment room (ER) or common equipment room (CER) (space containing Distributor
41、A, Distributor B, or Distributor C) Entrance facilities (EF) AdministrationTIA TSB-5018 1 1 SCOPE This TSB provides guidelines for DAS cabling infrastructure including cabling topology, design, components, installation practices, and testing. 2 REFERENCES The following standards contain provisions t
42、hat are referenced in this TSB. At the time of publi-cation, the editions indicated were valid. All standards are subject to revision, and parties are encouraged to investigate the possibility of applying the most recent editions of the standards indicated. ANSI and TIA maintain registers of current
43、ly valid national standards published by them. ANSI/TIA-568.0-D-2015, Generic Telecommunications Cabling for Customer Premises ANSI/TIA-568.3-D-2016, Optical Fiber Cabling and Components Standard ANSI/TIA-568-C.2-2009, Balanced Twisted-Pair Telecommunications Cabling and Com-ponents ANSI/TIA-568-C.4
44、-2011, Broadband Coaxial Cabling and Components Standard ANSI/TIA-569-D-2015, Telecommunications Pathways and Spaces TIA TSB-162-A-2013, Telecommunications Cabling Guidelines for Wireless Access Points 3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE 3.1 General For the purposes o
45、f this TSB, the following definitions, acronyms, abbreviations and units of measure apply. 3.2 Definitions antenna cable: Transmission media that connects to an antenna. base transceiver station: Head end equipment located within a DAS network. Cabling Subsystem 1: Cabling from the equipment outlet
46、to Distributor A, Distributor B, or Dis-tributor C. Cabling Subsystem 2: Cabling between Distributor A and either Distributor B or Distributor C (if Distributor B is not implemented). Cabling Subsystem 3: Cabling between Distributor B and Distributor C. coverage area: The area served by a device. di
47、stributed antenna system: A network of antenna nodes connected to common source(s) that provides wireless service. Distributor A: Optional connection facility in a hierarchical star topology that is cabled between the equipment outlet and Distributor B or Distributor C. Distributor B: Optional inter
48、mediate connection facility in a hierarchical star topology that is ca-bled to Distributor C. Distributor C: Central connection facility in a hierarchical star topology. TIA TSB-5018 2 equipment outlet: Outermost connection facility in a hierarchical star topology. head-end: Location of incoming car
49、rier signal(s) and distribution point for cabling infrastructure. radiating cable: Coaxial cable designed to receive and emit radio frequency signals along the length of the cable and act as an antenna. 3.3 Acronyms and abbreviations AHJ authority having jurisdiction ANSI American National Standards Institute BDA bi-direction amplifier BTS base transceiver station DAS distributed antenna system FCC Federal Communications Commission HEE head-end equipment IFC International Fire Code NFPA National Fire Protection Association RES radio enhancement system RF ra
