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Our datasets include clinics and hospitals to enable clinical insights and medical automation.",[140,143,146,149,152,155,158,161,164,167,170,173,176,179,182,185,188,191,194],{"name":141,"value":142},"Operating Theatre \u002F OR","37",{"name":144,"value":145},"Consultation Room","38",{"name":147,"value":148},"Treatment Room","39",{"name":150,"value":151},"Dental Clinic","40",{"name":153,"value":154},"Inpatient Ward","41",{"name":156,"value":157},"Nurse Station","42",{"name":159,"value":160},"ICU","43",{"name":162,"value":163},"NICU (Neonatal ICU)","44",{"name":165,"value":166},"Emergency Room (ER)","45",{"name":168,"value":169},"Hospital Corridor","46",{"name":171,"value":172},"Waiting Area","47",{"name":174,"value":175},"CT\u002FMRI","48",{"name":177,"value":178},"Medical Laboratory","49",{"name":180,"value":181},"Phlebotomy Room","50",{"name":183,"value":184},"Rehabilitation Gym","51",{"name":186,"value":187},"Assisted Living Room","52",{"name":189,"value":190},"Pharmacy","53",{"name":192,"value":193},"Sterile Processing Dept","54",{"name":195,"value":196},"Medical Storage","55",{"name":198,"value":17,"add_value":199,"describe":200,"children":201},"Business & Public Service","business","AI is elevating commercial and public services. Our datasets span retail, dining, and service centers to improve intelligent operations.",[202,205,208,211,214,217,220,223,226,229],{"name":203,"value":204},"Shopping Mall Atrium","86",{"name":206,"value":207},"Supermarket Shelf","87",{"name":209,"value":210},"Self-Checkout Counter","88",{"name":212,"value":213},"Restaurant Dining Hall","89",{"name":215,"value":216},"Commercial Kitchen","90",{"name":218,"value":219},"Hotel Lobby","91",{"name":221,"value":222},"Subway Platform","92",{"name":224,"value":225},"Security Checkpoint","93",{"name":227,"value":228},"Underground Parking","94",{"name":230,"value":231},"Bank Teller Zone","95",{"name":233,"value":20,"add_value":234,"describe":235,"children":236},"Industrial & Manufacturing","robot-arm","AI is modernizing industry. Our datasets capture factories and logistics spaces to support robotics and intelligent manufacturing.",[237,240,243,246,249,252,255,258,261,264],{"name":238,"value":239},"Final Assembly Line","96",{"name":241,"value":242},"Quality Control Station","97",{"name":244,"value":245},"Robotic Welding Cell","98",{"name":247,"value":248},"CNC Machining Center","99",{"name":250,"value":251},"Cleanroom","100",{"name":253,"value":254},"Automated Warehouse","101",{"name":256,"value":257},"Loading Dock","102",{"name":259,"value":260},"Sorting Center","103",{"name":262,"value":263},"Chemical Plant","104",{"name":265,"value":266},"Power Substation","105",{"name":268,"value":39,"add_value":269,"describe":270,"children":271},"Transportation & Driving","car","AI is revolutionizing mobility. Our datasets capture road networks, vehicle dynamics and traffic scenarios to support autonomous driving and intelligent transportation systems.",[272,275,278,281,284,287,290,293,296,299],{"name":273,"value":274},"Urban Intersection","56",{"name":276,"value":277},"Highway \u002F Expressway","57",{"name":279,"value":280},"Tunnel","58",{"name":282,"value":283},"Roundabout","59",{"name":285,"value":286},"School \u002F Hospital Zone","60",{"name":288,"value":289},"Toll Station","61",{"name":291,"value":292},"Construction Zone","62",{"name":294,"value":295},"Parking Garage","63",{"name":297,"value":298},"Driver Cabin","64",{"name":300,"value":301},"Adverse Weather","65",{"name":303,"value":42,"add_value":304,"describe":305,"children":306},"Outdoor & Construction","tent-tree","AI is optimizing outdoor operations. Our datasets capture construction sites, open-air work zones and outdoor infrastructure to support smart construction and autonomous outdoor machinery.",[307,310,313,316,319,322,325,328,331,334],{"name":308,"value":309},"Excavation Site","66",{"name":311,"value":312},"Scaffolding Area","67",{"name":314,"value":315},"Material Storage Yard","68",{"name":317,"value":318},"Site Entrance","69",{"name":320,"value":321},"Roadwork Zone","70",{"name":323,"value":324},"Bridge Infrastructure","71",{"name":326,"value":327},"Transmission Line","72",{"name":329,"value":330},"Open-pit Mine","73",{"name":332,"value":333},"Tunneling Site","74",{"name":335,"value":336},"Post-Disaster Rubble","75",{"name":338,"value":45,"add_value":339,"describe":340,"children":341},"Nature, Aerial & Aquatic","global-loop","AI is exploring the natural world. Our datasets capture terrestrial landscapes, aerial vistas and aquatic ecosystems to support environmental monitoring and autonomous exploration systems.",[342,345,348,351,354,357,360,363,366,369],{"name":343,"value":344},"Deep Forest","76",{"name":346,"value":347},"Farmland \u002F Crops","77",{"name":349,"value":350},"River \u002F Lake","78",{"name":352,"value":353},"Open Ocean","79",{"name":355,"value":356},"Underwater Coral Reef","80",{"name":358,"value":359},"Fish Farm","81",{"name":361,"value":362},"Mountain Terrain","82",{"name":364,"value":365},"Urban Low Altitude","83",{"name":367,"value":368},"Fire Scene","84",{"name":370,"value":371},"Desert \u002F Gobi","85",{"name":373,"value":48,"add_value":374,"describe":375,"children":376},"Virtul & Digital","siri","AI is reshaping the virtual realm. Our datasets capture digital twins, virtual environments and simulated spaces to support metaverse development and intelligent digital interaction.",[377,380,383,386,389,392,395,398,401,404],{"name":378,"value":379},"VR Social Space","106",{"name":381,"value":382},"Synthetic Driving Sim","107",{"name":384,"value":385},"Digital Twin City","108",{"name":387,"value":388},"FPS \u002F MOBA Game","109",{"name":390,"value":391},"Robotics Gym","110",{"name":393,"value":394},"AR Navigation","111",{"name":396,"value":397},"Virtual Showroom","112",{"name":399,"value":400},"Code \u002F IDE Interface","113",{"name":402,"value":403},"App GUI Screen","114",{"name":405,"value":406},"Synthetic 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座舱，通过语音、手势、面部识别等实现人机交互，如语音控制导航、音乐播放。\n驾驶员状态监测：识别疲劳、分心、抽烟、打电话等行为，通过大模型判断危险等级，触发相应提醒或干预机制。\n智能驾驶：AI 用于环境感知、路径规划与决策控制，使车辆能识别道路、行人、障碍物等，实现自适应巡航、自动泊车、车道保持等功能，提升驾驶安全性与便利性。",{"id":492,"value":492,"name":136,"intro":493,"add_value":137,"describe":493},4,"医学影像诊断：分析 CT、MRI 等影像，辅助医生检测疾病、识别病灶，如 AI 系统可快速发现肺部结节。\n医患对话助手：通过自然语言处理理解患者问题，提供初步健康建议或就诊指导，缓解医生接诊压力。\n智能健康管理：根据用户健康数据，提供个性化健康建议、疾病预警，如智能手环结合 AI 分析用户运动、睡眠、心率等数据。",{"id":495,"value":495,"name":496,"intro":497,"add_value":498,"describe":497},6,"Smart Devices","多模态交互：支持语音、手势、眼神等多种交互方式，如 AI 眼镜可通过语音指令实现翻译、搜索功能。\n智能感知与处理：使设备能感知环境、理解用户需求，如智能音箱根据环境噪音自动调节音量。\n个性化服务：根据用户使用习惯和偏好，提供个性化功能与服务，如智能手表为用户定制运动健身计划。","microscope",{"id":500,"value":500,"name":501,"intro":502,"add_value":503,"describe":502},8,"Law & 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E-commerce","智能客服：通过自然语言对话理解用户需求，提供产品推荐、订单查询、退换货支持等服务，提升客户满意度。\n个性化营销推荐：基于用户浏览、购买、偏好等行为数据，生成个性化推荐内容与优惠策略，提高转化率和客单价。\n商品内容生成：自动撰写商品标题、卖点描述、使用说明等内容，适用于海量SKU的内容生产与多语言发布。","buy",{"id":520,"value":520,"name":521,"intro":522,"add_value":523,"describe":8},10,"Security & Protection",null,"safe-shield-line",{"id":525,"value":525,"name":526,"intro":522,"add_value":527,"describe":8},11,"Environment & Climate","weather",{"id":529,"value":529,"name":530,"intro":522,"add_value":531,"describe":8},12,"Energy & Resource","energy-leaf",{"id":533,"value":533,"name":534,"intro":522,"add_value":535,"describe":8},13,"Express & Logistics","speed-outline",{"id":537,"value":537,"name":538,"intro":522,"add_value":539,"describe":8},15,"Sports","baseball-outline",{"id":541,"value":541,"name":542,"intro":522,"add_value":543,"describe":8},16,"General Data","daily-booth",{"id":545,"value":545,"name":546,"intro":522,"add_value":547,"describe":8},17,"Content & 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Culture","lang",{"id":564,"unique_code":565,"title":566,"icon":8,"intro":567,"cate":483,"detail":568,"create_time":569,"update_time":570,"price":571,"view_count":572,"download_count":573,"unit":573,"amount":574,"is_create_order":573,"enterprise_id":488,"seo_keywords":575,"seo_description":576,"data_format":577,"file_size":578,"apply_scene":579,"training_task":580,"version":581,"dataset_type_id":492,"dataset_scene_id":553,"sample_file":522,"banner":8,"unit_name":8,"cate_name":449,"icon_url":8,"banner_url":8,"sample_file_url":8,"data_dict":582,"qa_list":614,"sample_metadatas":631,"text_sample_content":661,"enterprise_name":662,"enterprise_logo":663,"data_distribution":664},1073,"069dd1645accfa430e86216575fcb96d","Indoor Distributed Antenna System Topology and Coverage Design Reasoning Dataset","Train models to derive indoor DAS topologies and explain coverage design decisions through structured problems and constraint analysis.","\u003Cp>This dataset presents indoor distributed antenna system design problems involving building zones, coverage objectives, signal source conditions, link losses, and equipment constraints, together with topology derivations and constraint analysis. Its records describe proposed topologies, equipment and network nodes, connections, coverage areas, feasibility, key assumptions, and potential risks. It is suited to reasoning SFT, indoor coverage planning analysis, and research on communication network design reasoning.\u003C\u002Fp>","2026-10-09 18:46:32","2026-10-19 17:20:16","0.00",31,0,5000,"indoor DAS dataset, DAS topology design, indoor coverage planning, telecom network reasoning, logical reasoning data, reasoning SFT dataset, distributed antenna system, telecom engineering data","Topology, coverage, and equipment-constraint reasoning for indoor DAS design, suited to reasoning SFT and telecom network analysis.","JSON","0.3GB","indoor wireless coverage optimization, distributed antenna system design, telecommunications network planning","topology reasoning, coverage design, constraint analysis","V1.0",[583,588,593,598,603,609],{"id":573,"name":584,"field":585,"intro":586,"type":587},"File Name","file_name","File name","string",{"id":589,"name":590,"field":591,"intro":592,"type":587},7802,"Design Question","design_question","The original design problem, including building zones, coverage objectives, signal source conditions, link losses, and equipment constraints.",{"id":594,"name":595,"field":596,"intro":597,"type":587},7803,"Topology Summary","topology_summary","An overview of the recommended indoor distributed antenna system topology and its coverage approach.",{"id":599,"name":600,"field":601,"intro":602,"type":587},7804,"Design Conclusion","design_conclusion","A summary of the topology's feasibility, including key assumptions, risks, and any information that still needs to be provided.",{"id":604,"name":605,"field":606,"intro":607,"type":608},7805,"Constraint Analysis","constraint_analysis","An explanation of how each design constraint affects the solution and how the constraints jointly influence topology selection.","array",{"id":610,"name":611,"field":612,"intro":613,"type":608},7806,"Topology Components","topology_components","The main equipment or network nodes in the topology, their connections, and the coverage areas they serve.",[615,619,623,627],{"id":616,"question":617,"answer":618},5739,"What design topics does the dataset cover?","Each record addresses an indoor distributed antenna system design problem involving building zones, coverage objectives, signal source conditions, link losses, and equipment constraints. It includes a topology overview, component and connection details, constraint analysis, and a design conclusion.",{"id":620,"question":621,"answer":622},5740,"What is the data format, and which training tasks does it support?","The dataset is centered on question-and-answer text, with fields for the original design question, proposed topology, topology components, constraint relationships, and design conclusion. It supports logical reasoning training, reasoning SFT, and indoor DAS design analysis.",{"id":624,"question":625,"answer":626},5741,"Can the proposed designs be used directly for deployment?","The records are intended for training and design reasoning analysis, not as ready-to-build field plans. Before deployment, verify the design against building plans, site surveys, equipment specifications, frequency plans, and applicable regulations.",{"id":628,"question":629,"answer":630},5742,"How can I obtain the dataset, and what are the licensing terms?","Check the dataset product page for available versions, delivery options, and acquisition steps. Permitted uses, licensing terms, and commercial-use rights are governed by the product page and applicable license agreement.",[632,643,652],{"id":633,"relate_table":634,"relate_id":635,"file_size":573,"file_name":8,"path":8,"duration":573,"cate":483,"file_format":8,"audio_rate":8,"audio_channel":522,"audio_bit_depth":522,"quality":8,"annotation":636,"cate_name":637,"design_question":638,"topology_summary":639,"design_conclusion":640,"constraint_analysis":641,"topology_components":642},14621,"union_cubo",1376556627,"{\"design_question\": \"A two-level underground parking facility has four zones: the north and south areas on B1, and the north and south areas on B2. The target is at least -95 dBm RSRP in 95% of occupied parking areas. A passive source in the riser room provides 17 dBm per band at 850 MHz and 1900 MHz. The planning criterion requires at least 3 dBm at each antenna input, so the maximum permitted passive path loss is 14 dB. The supplied path estimates, including splitters, feeders, and connectors, are 9 dB for B1 north, 11 dB for B1 south, 16 dB for B2 north, and 19 dB for B2 south. Active equipment and additional power are prohibited in the garage, and the source cannot exceed 17 dBm per band. What topology can be laid out, and do the stated constraints permit all four zones to meet the design criterion?\", \"topology_summary\": \"A passive star from the riser room can distribute the two bands to separate branches for the four parking zones, with antenna groups placed in each zone. However, the supplied path estimates show that the B2 north and B2 south branches exceed the 14 dB maximum loss by 2 dB and 5 dB, respectively. The passive layout can meet the stated antenna-input criterion for the two B1 branches, but it cannot meet it in all four zones without changing a constraint or reducing the B2 path losses.\", \"design_conclusion\": \"The proposed passive star is only partially feasible. The B1 branches meet the 14 dB loss limit, but the B2 north and south branches exceed it, leaving antenna-input levels below the required 3 dBm. As specified, the design cannot satisfy the criterion in all four zones. A compliant conclusion requires reducing B2 path losses to 14 dB or less, or formally changing the no-active-equipment, power, or input-level constraints; coverage must then be verified on site.\", \"constraint_analysis\": \"[{\\\"constraint\\\": \\\"The source is limited to 17 dBm per band, and each antenna input must receive at least 3 dBm.\\\", \\\"impact\\\": \\\"The maximum allowable loss is 14 dB. B1 north and south meet this criterion, while both B2 paths fall short at their antenna inputs.\\\", \\\"resolution\\\": \\\"Keep the source at its permitted level and treat the supplied path-loss estimates as binding. Increasing source power is not a compliant remedy; the B2 paths need lower loss or a formally revised design constraint.\\\"}, {\\\"constraint\\\": \\\"The estimated path losses are 9 dB, 11 dB, 16 dB, and 19 dB for B1 north, B1 south, B2 north, and B2 south.\\\", \\\"impact\\\": \\\"The B1 paths leave 8 dBm and 6 dBm at the antenna inputs. The B2 paths leave 1 dBm and -2 dBm, below the 3 dBm minimum by 2 dB and 5 dB.\\\", \\\"resolution\\\": \\\"Retain the B1 branches as planned. For B2, first investigate whether shorter feeder routes or fewer passive losses can bring each path to 14 dB or less. If not, the passive-only and no-additional-power constraints conflict with the required antenna-input level.\\\"}, {\\\"constraint\\\": \\\"Active equipment and additional power are prohibited in the garage.\\\", \\\"impact\\\": \\\"Remote units or amplifiers cannot be placed near B2 to overcome its excess feeder loss under the current rules.\\\", \\\"resolution\\\": \\\"Consider only passive rerouting or other passive loss reductions within the permitted installation rules. If these cannot reduce B2 losses sufficiently, obtain approval to change an equipment or power constraint before claiming a compliant all-zone design.\\\"}, {\\\"constraint\\\": \\\"The target is -95 dBm RSRP in 95% of occupied parking areas.\\\", \\\"impact\\\": \\\"Meeting the antenna-input power criterion is necessary for the stated planning approach but does not alone prove the area-level RSRP target, and the B2 input shortfall makes the current design noncompliant even before coverage validation.\\\", \\\"resolution\\\": \\\"Resolve the B2 path-budget failure first, then validate RSRP across all four zones by site survey. Do not treat the passive topology alone as evidence that the 95% coverage target has been achieved.\\\"}]\", \"topology_components\": \"[{\\\"component_name\\\": \\\"Dual-band passive source\\\", \\\"component_type\\\": \\\"RF source\\\", \\\"served_zones\\\": [], \\\"connection_path\\\": \\\"Feeds both bands from the riser room into the passive distribution network.\\\", \\\"design_rationale\\\": \\\"The source is fixed at 17 dBm per band and cannot be increased under the stated equipment constraint.\\\"}, {\\\"component_name\\\": \\\"Riser-room distribution panel\\\", \\\"component_type\\\": \\\"Passive distribution panel\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\", \\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Connects the source to four zone-specific feeder branches routed from the riser room to B1 and B2.\\\", \\\"design_rationale\\\": \\\"A star arrangement makes each zone's path identifiable and allows its loss to be compared directly with the 14 dB criterion.\\\"}, {\\\"component_name\\\": \\\"B1 feeder branches\\\", \\\"component_type\\\": \\\"Coaxial feeders and passive splitters\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\"], \\\"connection_path\\\": \\\"Two separate branches run from the distribution panel to the B1 north and south antenna groups.\\\", \\\"design_rationale\\\": \\\"The stated 9 dB and 11 dB path losses are below the 14 dB limit, leaving 8 dBm and 6 dBm, respectively, at the antenna inputs under the supplied source level.\\\"}, {\\\"component_name\\\": \\\"B2 feeder branches\\\", \\\"component_type\\\": \\\"Coaxial feeders and passive splitters\\\", \\\"served_zones\\\": [\\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Two separate branches run from the distribution panel to the B2 north and south antenna groups.\\\", \\\"design_rationale\\\": \\\"The branches preserve zone separation, but their stated 16 dB and 19 dB path losses exceed the permitted loss and therefore do not meet the antenna-input criterion as currently routed.\\\"}, {\\\"component_name\\\": \\\"Parking-zone antenna groups\\\", \\\"component_type\\\": \\\"Indoor antennas\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\", \\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Each group connects to its corresponding zone feeder branch and distributes the signal within that parking area.\\\", \\\"design_rationale\\\": \\\"Separate antenna groups align with the four defined coverage zones. Their placement can be optimized, but it cannot compensate for an antenna-input level below the stated criterion.\\\"}]\"}","文本","A two-level underground parking facility has four zones: the north and south areas on B1, and the north and south areas on B2. The target is at least -95 dBm RSRP in 95% of occupied parking areas. A passive source in the riser room provides 17 dBm per band at 850 MHz and 1900 MHz. The planning criterion requires at least 3 dBm at each antenna input, so the maximum permitted passive path loss is 14 dB. The supplied path estimates, including splitters, feeders, and connectors, are 9 dB for B1 north, 11 dB for B1 south, 16 dB for B2 north, and 19 dB for B2 south. Active equipment and additional power are prohibited in the garage, and the source cannot exceed 17 dBm per band. What topology can be laid out, and do the stated constraints permit all four zones to meet the design criterion?","A passive star from the riser room can distribute the two bands to separate branches for the four parking zones, with antenna groups placed in each zone. However, the supplied path estimates show that the B2 north and B2 south branches exceed the 14 dB maximum loss by 2 dB and 5 dB, respectively. The passive layout can meet the stated antenna-input criterion for the two B1 branches, but it cannot meet it in all four zones without changing a constraint or reducing the B2 path losses.","The proposed passive star is only partially feasible. The B1 branches meet the 14 dB loss limit, but the B2 north and south branches exceed it, leaving antenna-input levels below the required 3 dBm. As specified, the design cannot satisfy the criterion in all four zones. A compliant conclusion requires reducing B2 path losses to 14 dB or less, or formally changing the no-active-equipment, power, or input-level constraints; coverage must then be verified on site.","[{\"constraint\": \"The source is limited to 17 dBm per band, and each antenna input must receive at least 3 dBm.\", \"impact\": \"The maximum allowable loss is 14 dB. B1 north and south meet this criterion, while both B2 paths fall short at their antenna inputs.\", \"resolution\": \"Keep the source at its permitted level and treat the supplied path-loss estimates as binding. Increasing source power is not a compliant remedy; the B2 paths need lower loss or a formally revised design constraint.\"}, {\"constraint\": \"The estimated path losses are 9 dB, 11 dB, 16 dB, and 19 dB for B1 north, B1 south, B2 north, and B2 south.\", \"impact\": \"The B1 paths leave 8 dBm and 6 dBm at the antenna inputs. The B2 paths leave 1 dBm and -2 dBm, below the 3 dBm minimum by 2 dB and 5 dB.\", \"resolution\": \"Retain the B1 branches as planned. For B2, first investigate whether shorter feeder routes or fewer passive losses can bring each path to 14 dB or less. If not, the passive-only and no-additional-power constraints conflict with the required antenna-input level.\"}, {\"constraint\": \"Active equipment and additional power are prohibited in the garage.\", \"impact\": \"Remote units or amplifiers cannot be placed near B2 to overcome its excess feeder loss under the current rules.\", \"resolution\": \"Consider only passive rerouting or other passive loss reductions within the permitted installation rules. If these cannot reduce B2 losses sufficiently, obtain approval to change an equipment or power constraint before claiming a compliant all-zone design.\"}, {\"constraint\": \"The target is -95 dBm RSRP in 95% of occupied parking areas.\", \"impact\": \"Meeting the antenna-input power criterion is necessary for the stated planning approach but does not alone prove the area-level RSRP target, and the B2 input shortfall makes the current design noncompliant even before coverage validation.\", \"resolution\": \"Resolve the B2 path-budget failure first, then validate RSRP across all four zones by site survey. Do not treat the passive topology alone as evidence that the 95% coverage target has been achieved.\"}]","[{\"component_name\": \"Dual-band passive source\", \"component_type\": \"RF source\", \"served_zones\": [], \"connection_path\": \"Feeds both bands from the riser room into the passive distribution network.\", \"design_rationale\": \"The source is fixed at 17 dBm per band and cannot be increased under the stated equipment constraint.\"}, {\"component_name\": \"Riser-room distribution panel\", \"component_type\": \"Passive distribution panel\", \"served_zones\": [\"B1 north\", \"B1 south\", \"B2 north\", \"B2 south\"], \"connection_path\": \"Connects the source to four zone-specific feeder branches routed from the riser room to B1 and B2.\", \"design_rationale\": \"A star arrangement makes each zone's path identifiable and allows its loss to be compared directly with the 14 dB criterion.\"}, {\"component_name\": \"B1 feeder branches\", \"component_type\": \"Coaxial feeders and passive splitters\", \"served_zones\": [\"B1 north\", \"B1 south\"], \"connection_path\": \"Two separate branches run from the distribution panel to the B1 north and south antenna groups.\", \"design_rationale\": \"The stated 9 dB and 11 dB path losses are below the 14 dB limit, leaving 8 dBm and 6 dBm, respectively, at the antenna inputs under the supplied source level.\"}, {\"component_name\": \"B2 feeder branches\", \"component_type\": \"Coaxial feeders and passive splitters\", \"served_zones\": [\"B2 north\", \"B2 south\"], \"connection_path\": \"Two separate branches run from the distribution panel to the B2 north and south antenna groups.\", \"design_rationale\": \"The branches preserve zone separation, but their stated 16 dB and 19 dB path losses exceed the permitted loss and therefore do not meet the antenna-input criterion as currently routed.\"}, {\"component_name\": \"Parking-zone antenna groups\", \"component_type\": \"Indoor antennas\", \"served_zones\": [\"B1 north\", \"B1 south\", \"B2 north\", \"B2 south\"], \"connection_path\": \"Each group connects to its corresponding zone feeder branch and distributes the signal within that parking area.\", \"design_rationale\": \"Separate antenna groups align with the four defined coverage zones. Their placement can be optimized, but it cannot compensate for an antenna-input level below the stated criterion.\"}]",{"id":644,"relate_table":634,"relate_id":645,"file_size":573,"file_name":8,"path":8,"duration":573,"cate":483,"file_format":8,"audio_rate":8,"audio_channel":522,"audio_bit_depth":522,"quality":8,"annotation":646,"cate_name":637,"design_question":647,"topology_summary":648,"design_conclusion":649,"constraint_analysis":650,"topology_components":651},14620,1108058892,"{\"design_question\": \"A 120 m by 80 m warehouse has four coverage zones: the loading dock, north rack aisles, south rack aisles, and packing and office area. The target is at least -95 dBm RSRP and 5 dB SINR in occupied work areas. A digital DAS headend can connect to four remote units and supports the required 700 MHz, 1800 MHz, and 3500 MHz bands. The proposed fiber routes from the headend to four mounting points are each under 300 m; the specified system supports up to 1 km per link. AC power is available at those four points, but not along the rack aisles. Each remote unit can feed a local antenna group, and the planned coax runs from each unit to its antennas are no longer than 45 m with estimated loss no greater than 6 dB. How should the zones be served, and how do the route and equipment constraints affect the choice?\", \"topology_summary\": \"Use a fiber-fed active DAS with one remote unit at each of the four zone mounting points. Carry the supported bands over fiber from the headend, then use short local coax branches from each remote unit to antennas positioned for its zone. The four remote-unit limit, available power points, fiber distances, and local coax-loss estimates align with this arrangement. Coverage performance remains subject to site validation, particularly in the rack aisles and at the loading dock.\", \"design_conclusion\": \"The proposed fiber-fed topology is feasible with the stated hardware and installation constraints: four remotes serve four zones, all fiber routes are within the link limit, and local coax runs meet the stated limits. The -95 dBm RSRP and 5 dB SINR targets still require site-specific validation. The design has no spare remote-unit capacity, so any additional zone or active-node requirement would trigger a topology review.\", \"constraint_analysis\": \"[{\\\"constraint\\\": \\\"The system supports four remote units and there are four defined coverage zones.\\\", \\\"impact\\\": \\\"There is no spare remote-unit capacity for adding another independent zone without changing the equipment arrangement.\\\", \\\"resolution\\\": \\\"Assign one remote unit to each zone. If later survey results require a separate additional coverage area, reassess the remote capacity and fiber plan rather than silently sharing a unit beyond its design assumptions.\\\"}, {\\\"constraint\\\": \\\"Each fiber route is under 300 m, while the system link limit is 1 km.\\\", \\\"impact\\\": \\\"The stated routes are within the specified fiber-distance limit, so the link distance does not require moving the headend or substituting a long RF feeder.\\\", \\\"resolution\\\": \\\"Use the four fiber routes as planned and verify the installed route lengths and optical link budgets. The fiber-distance margin enables remote placement near the served zones.\\\"}, {\\\"constraint\\\": \\\"AC power is available only at the four remote mounting points, not along the rack aisles.\\\", \\\"impact\\\": \\\"Powered equipment can be installed at the designated points, but additional active nodes along the aisles cannot be assumed.\\\", \\\"resolution\\\": \\\"Place one remote at each powered point and distribute passively over local coax to the antenna groups. Any need for another active node would require a new power and placement plan.\\\"}, {\\\"constraint\\\": \\\"Local coax runs are limited to 45 m and estimated to have no more than 6 dB loss.\\\", \\\"impact\\\": \\\"Longer or more lossy runs could reduce the available antenna input level, especially across the warehouse's broad zones.\\\", \\\"resolution\\\": \\\"Keep each remote close enough to its antenna group to meet the stated run and loss limits. The rack-aisle layout and the 3500 MHz band make local route verification important; adjust antenna placement or the remote location if the estimate is exceeded.\\\"}, {\\\"constraint\\\": \\\"The coverage targets are -95 dBm RSRP and 5 dB SINR in occupied areas.\\\", \\\"impact\\\": \\\"Compliance cannot be concluded from fiber and coax limits alone; propagation, antenna orientation, and interference conditions determine the area-level results.\\\", \\\"resolution\\\": \\\"Commission the four-zone layout with measurements in occupied areas, including representative rack aisles and the dock. Use the results to tune antenna placement and balance, while keeping within the remote, power, and feeder constraints.\\\"}]\", \"topology_components\": \"[{\\\"component_name\\\": \\\"Digital DAS headend\\\", \\\"component_type\\\": \\\"DAS headend and signal interface\\\", \\\"served_zones\\\": [], \\\"connection_path\\\": \\\"Receives the stated source signals and sends the supported bands over four separate fiber links to the zone remote units.\\\", \\\"design_rationale\\\": \\\"The headend supports the required bands and four remotes, matching the number of defined coverage zones.\\\"}, {\\\"component_name\\\": \\\"Fiber link to loading dock\\\", \\\"component_type\\\": \\\"Optical feeder\\\", \\\"served_zones\\\": [\\\"Loading dock\\\"], \\\"connection_path\\\": \\\"Runs from the headend to the loading-dock remote unit; the stated route is under 300 m.\\\", \\\"design_rationale\\\": \\\"The route is within the system's 1 km link limit and avoids a long RF coax run back to the headend.\\\"}, {\\\"component_name\\\": \\\"Fiber links to rack-aisle remotes\\\", \\\"component_type\\\": \\\"Optical feeders\\\", \\\"served_zones\\\": [\\\"North rack aisles\\\", \\\"South rack aisles\\\"], \\\"connection_path\\\": \\\"Two separate links run from the headend to powered mounting points serving the north and south rack areas.\\\", \\\"design_rationale\\\": \\\"Separate remote locations allow the antenna groups to be placed near their respective aisle zones while preserving fiber distribution from the headend.\\\"}, {\\\"component_name\\\": \\\"Fiber link to packing and office remote\\\", \\\"component_type\\\": \\\"Optical feeder\\\", \\\"served_zones\\\": [\\\"Packing and office area\\\"], \\\"connection_path\\\": \\\"Runs from the headend to the remote unit at the powered packing-and-office mounting point.\\\", \\\"design_rationale\\\": \\\"The stated route length is within the supported limit and uses one of the four available remote-unit connections.\\\"}, {\\\"component_name\\\": \\\"Zone remote units\\\", \\\"component_type\\\": \\\"Active DAS remote units\\\", \\\"served_zones\\\": [\\\"Loading dock\\\", \\\"North rack aisles\\\", \\\"South rack aisles\\\", \\\"Packing and office area\\\"], \\\"connection_path\\\": \\\"One unit is installed at each zone mounting point, connected upstream by its fiber link and downstream to local coax antenna branches.\\\", \\\"design_rationale\\\": \\\"The four units use the full available remote capacity and place RF distribution close to the areas being covered. Each mounting point has the required AC power.\\\"}, {\\\"component_name\\\": \\\"Local antenna groups\\\", \\\"component_type\\\": \\\"Indoor antennas and coax feeders\\\", \\\"served_zones\\\": [\\\"Loading dock\\\", \\\"North rack aisles\\\", \\\"South rack aisles\\\", \\\"Packing and office area\\\"], \\\"connection_path\\\": \\\"Each group connects to its zone remote unit over coax runs no longer than 45 m, with estimated loss no greater than 6 dB.\\\", \\\"design_rationale\\\": \\\"Short local RF runs limit feeder loss. Antenna placement can be tailored to the open dock, aisle geometry, and occupied packing and office space.\\\"}]\"}","A 120 m by 80 m warehouse has four coverage zones: the loading dock, north rack aisles, south rack aisles, and packing and office area. The target is at least -95 dBm RSRP and 5 dB SINR in occupied work areas. A digital DAS headend can connect to four remote units and supports the required 700 MHz, 1800 MHz, and 3500 MHz bands. The proposed fiber routes from the headend to four mounting points are each under 300 m; the specified system supports up to 1 km per link. AC power is available at those four points, but not along the rack aisles. Each remote unit can feed a local antenna group, and the planned coax runs from each unit to its antennas are no longer than 45 m with estimated loss no greater than 6 dB. How should the zones be served, and how do the route and equipment constraints affect the choice?","Use a fiber-fed active DAS with one remote unit at each of the four zone mounting points. Carry the supported bands over fiber from the headend, then use short local coax branches from each remote unit to antennas positioned for its zone. The four remote-unit limit, available power points, fiber distances, and local coax-loss estimates align with this arrangement. Coverage performance remains subject to site validation, particularly in the rack aisles and at the loading dock.","The proposed fiber-fed topology is feasible with the stated hardware and installation constraints: four remotes serve four zones, all fiber routes are within the link limit, and local coax runs meet the stated limits. The -95 dBm RSRP and 5 dB SINR targets still require site-specific validation. The design has no spare remote-unit capacity, so any additional zone or active-node requirement would trigger a topology review.","[{\"constraint\": \"The system supports four remote units and there are four defined coverage zones.\", \"impact\": \"There is no spare remote-unit capacity for adding another independent zone without changing the equipment arrangement.\", \"resolution\": \"Assign one remote unit to each zone. If later survey results require a separate additional coverage area, reassess the remote capacity and fiber plan rather than silently sharing a unit beyond its design assumptions.\"}, {\"constraint\": \"Each fiber route is under 300 m, while the system link limit is 1 km.\", \"impact\": \"The stated routes are within the specified fiber-distance limit, so the link distance does not require moving the headend or substituting a long RF feeder.\", \"resolution\": \"Use the four fiber routes as planned and verify the installed route lengths and optical link budgets. The fiber-distance margin enables remote placement near the served zones.\"}, {\"constraint\": \"AC power is available only at the four remote mounting points, not along the rack aisles.\", \"impact\": \"Powered equipment can be installed at the designated points, but additional active nodes along the aisles cannot be assumed.\", \"resolution\": \"Place one remote at each powered point and distribute passively over local coax to the antenna groups. Any need for another active node would require a new power and placement plan.\"}, {\"constraint\": \"Local coax runs are limited to 45 m and estimated to have no more than 6 dB loss.\", \"impact\": \"Longer or more lossy runs could reduce the available antenna input level, especially across the warehouse's broad zones.\", \"resolution\": \"Keep each remote close enough to its antenna group to meet the stated run and loss limits. The rack-aisle layout and the 3500 MHz band make local route verification important; adjust antenna placement or the remote location if the estimate is exceeded.\"}, {\"constraint\": \"The coverage targets are -95 dBm RSRP and 5 dB SINR in occupied areas.\", \"impact\": \"Compliance cannot be concluded from fiber and coax limits alone; propagation, antenna orientation, and interference conditions determine the area-level results.\", \"resolution\": \"Commission the four-zone layout with measurements in occupied areas, including representative rack aisles and the dock. Use the results to tune antenna placement and balance, while keeping within the remote, power, and feeder constraints.\"}]","[{\"component_name\": \"Digital DAS headend\", \"component_type\": \"DAS headend and signal interface\", \"served_zones\": [], \"connection_path\": \"Receives the stated source signals and sends the supported bands over four separate fiber links to the zone remote units.\", \"design_rationale\": \"The headend supports the required bands and four remotes, matching the number of defined coverage zones.\"}, {\"component_name\": \"Fiber link to loading dock\", \"component_type\": \"Optical feeder\", \"served_zones\": [\"Loading dock\"], \"connection_path\": \"Runs from the headend to the loading-dock remote unit; the stated route is under 300 m.\", \"design_rationale\": \"The route is within the system's 1 km link limit and avoids a long RF coax run back to the headend.\"}, {\"component_name\": \"Fiber links to rack-aisle remotes\", \"component_type\": \"Optical feeders\", \"served_zones\": [\"North rack aisles\", \"South rack aisles\"], \"connection_path\": \"Two separate links run from the headend to powered mounting points serving the north and south rack areas.\", \"design_rationale\": \"Separate remote locations allow the antenna groups to be placed near their respective aisle zones while preserving fiber distribution from the headend.\"}, {\"component_name\": \"Fiber link to packing and office remote\", \"component_type\": \"Optical feeder\", \"served_zones\": [\"Packing and office area\"], \"connection_path\": \"Runs from the headend to the remote unit at the powered packing-and-office mounting point.\", \"design_rationale\": \"The stated route length is within the supported limit and uses one of the four available remote-unit connections.\"}, {\"component_name\": \"Zone remote units\", \"component_type\": \"Active DAS remote units\", \"served_zones\": [\"Loading dock\", \"North rack aisles\", \"South rack aisles\", \"Packing and office area\"], \"connection_path\": \"One unit is installed at each zone mounting point, connected upstream by its fiber link and downstream to local coax antenna branches.\", \"design_rationale\": \"The four units use the full available remote capacity and place RF distribution close to the areas being covered. Each mounting point has the required AC power.\"}, {\"component_name\": \"Local antenna groups\", \"component_type\": \"Indoor antennas and coax feeders\", \"served_zones\": [\"Loading dock\", \"North rack aisles\", \"South rack aisles\", \"Packing and office area\"], \"connection_path\": \"Each group connects to its zone remote unit over coax runs no longer than 45 m, with estimated loss no greater than 6 dB.\", \"design_rationale\": \"Short local RF runs limit feeder loss. Antenna placement can be tailored to the open dock, aisle geometry, and occupied packing and office space.\"}]",{"id":653,"relate_table":634,"relate_id":654,"file_size":573,"file_name":8,"path":8,"duration":573,"cate":483,"file_format":8,"audio_rate":8,"audio_channel":522,"audio_bit_depth":522,"quality":8,"annotation":655,"cate_name":637,"design_question":656,"topology_summary":657,"design_conclusion":658,"constraint_analysis":659,"topology_components":660},14619,1707697993,"{\"design_question\": \"A three-story office has six coverage zones: east and west wings on each floor. The target is at least -95 dBm RSRP and 5 dB SINR in occupied areas. A dual-band source provides 20 dBm per band at the headend for 700 MHz and 1800 MHz. The design is limited to passive distribution equipment, with no powered equipment outside the communications room. The planning worksheet estimates 13–17 dB of passive loss from the headend to the antenna input on the six proposed branches, including splitters, feeders, and connectors. The accepted maximum is 18 dB. What topology should be used, and what do these constraints imply for feasibility?\", \"topology_summary\": \"Use a passive, star-fed DAS: carry both bands from the communications room over a vertical riser, split the signal on each floor, and feed separate east- and west-wing antenna branches. The stated branch-loss estimates remain within the 18 dB limit, leaving at least 3 dBm per band at the antenna inputs under the supplied 20 dBm headend level. This supports proceeding to coverage validation, but does not by itself establish that the RSRP and SINR targets will be met throughout the office.\", \"design_conclusion\": \"The passive star topology is feasible against the supplied branch-loss and equipment constraints: all estimated paths are at or below 18 dB, and no remote power is required. It is a candidate design rather than a guaranteed coverage result. Confirm antenna placement, actual installed losses, RSRP, and SINR on all six wings before acceptance.\", \"constraint_analysis\": \"[{\\\"constraint\\\": \\\"The source provides 20 dBm per band, and the maximum accepted passive loss is 18 dB.\\\", \\\"impact\\\": \\\"The maximum permitted loss leaves a minimum of 2 dBm at an antenna input; the estimated 13–17 dB branch losses leave 3–7 dBm.\\\", \\\"resolution\\\": \\\"The stated branches meet the supplied loss limit. The margin is smallest on the 17 dB branches, so those runs should be verified during commissioning; adding unbudgeted splitters or feeder length could consume the margin.\\\"}, {\\\"constraint\\\": \\\"Only passive equipment may be installed outside the communications room.\\\", \\\"impact\\\": \\\"Remote amplifiers or powered distribution nodes cannot be used to compensate for a long or lossy branch.\\\", \\\"resolution\\\": \\\"Keep the distribution passive and use the planned riser, floor splitters, and wing branches. This makes the loss limit especially important: any branch exceeding it requires a revised passive layout or a change to the equipment constraint.\\\"}, {\\\"constraint\\\": \\\"Coverage targets are at least -95 dBm RSRP and 5 dB SINR in occupied areas.\\\", \\\"impact\\\": \\\"Antenna-input power alone does not establish indoor field strength or interference performance; propagation, antenna placement, and the source environment also affect the result.\\\", \\\"resolution\\\": \\\"Retain the distributed antenna layout as the candidate topology, then verify the targets with a site-specific coverage assessment and walk test. If a zone fails, adjust antenna placement or branch design without exceeding the loss limit.\\\"}]\", \"topology_components\": \"[{\\\"component_name\\\": \\\"Dual-band signal source\\\", \\\"component_type\\\": \\\"RF source\\\", \\\"served_zones\\\": [], \\\"connection_path\\\": \\\"Feeds the headend distribution port for 700 MHz and 1800 MHz; the output is carried to the vertical riser.\\\", \\\"design_rationale\\\": \\\"The stated source provides 20 dBm per band, which is the starting level for the supplied passive-loss budget.\\\"}, {\\\"component_name\\\": \\\"Headend distribution panel and vertical riser\\\", \\\"component_type\\\": \\\"Passive distribution panel and feeder\\\", \\\"served_zones\\\": [\\\"Floor 1 east wing\\\", \\\"Floor 1 west wing\\\", \\\"Floor 2 east wing\\\", \\\"Floor 2 west wing\\\", \\\"Floor 3 east wing\\\", \\\"Floor 3 west wing\\\"], \\\"connection_path\\\": \\\"Connects the source to the riser feeder and carries both bands to floor-level splitters.\\\", \\\"design_rationale\\\": \\\"A shared riser avoids separate source equipment on each floor; its losses are included in the provided branch estimates.\\\"}, {\\\"component_name\\\": \\\"Floor-level two-way splitters, one per floor\\\", \\\"component_type\\\": \\\"Power splitters\\\", \\\"served_zones\\\": [\\\"Floor 1 east wing\\\", \\\"Floor 1 west wing\\\", \\\"Floor 2 east wing\\\", \\\"Floor 2 west wing\\\", \\\"Floor 3 east wing\\\", \\\"Floor 3 west wing\\\"], \\\"connection_path\\\": \\\"Each splitter takes its input from the vertical riser and provides separate outputs to the east- and west-wing branches on that floor.\\\", \\\"design_rationale\\\": \\\"The floor-by-floor split matches the six-zone layout and keeps the branches distinct for balancing and troubleshooting.\\\"}, {\\\"component_name\\\": \\\"Wing feeder branches\\\", \\\"component_type\\\": \\\"Coaxial feeders and directional taps\\\", \\\"served_zones\\\": [\\\"Floor 1 east wing\\\", \\\"Floor 1 west wing\\\", \\\"Floor 2 east wing\\\", \\\"Floor 2 west wing\\\", \\\"Floor 3 east wing\\\", \\\"Floor 3 west wing\\\"], \\\"connection_path\\\": \\\"Each branch runs from a floor splitter along its wing and connects to three ceiling antennas through feeder sections and directional taps.\\\", \\\"design_rationale\\\": \\\"Separate east- and west-wing runs follow the coverage zones; the branch loss estimates account for the associated passive components.\\\"}, {\\\"component_name\\\": \\\"Ceiling antenna groups\\\", \\\"component_type\\\": \\\"Indoor antennas\\\", \\\"served_zones\\\": [\\\"Floor 1 east wing\\\", \\\"Floor 1 west wing\\\", \\\"Floor 2 east wing\\\", \\\"Floor 2 west wing\\\", \\\"Floor 3 east wing\\\", \\\"Floor 3 west wing\\\"], \\\"connection_path\\\": \\\"Three antennas per wing connect at the planned tap points on that wing's feeder branch.\\\", \\\"design_rationale\\\": \\\"Distributed antenna locations provide coverage across each wing rather than relying on a single central radiator.\\\"}]\"}","A three-story office has six coverage zones: east and west wings on each floor. The target is at least -95 dBm RSRP and 5 dB SINR in occupied areas. A dual-band source provides 20 dBm per band at the headend for 700 MHz and 1800 MHz. The design is limited to passive distribution equipment, with no powered equipment outside the communications room. The planning worksheet estimates 13–17 dB of passive loss from the headend to the antenna input on the six proposed branches, including splitters, feeders, and connectors. The accepted maximum is 18 dB. What topology should be used, and what do these constraints imply for feasibility?","Use a passive, star-fed DAS: carry both bands from the communications room over a vertical riser, split the signal on each floor, and feed separate east- and west-wing antenna branches. The stated branch-loss estimates remain within the 18 dB limit, leaving at least 3 dBm per band at the antenna inputs under the supplied 20 dBm headend level. This supports proceeding to coverage validation, but does not by itself establish that the RSRP and SINR targets will be met throughout the office.","The passive star topology is feasible against the supplied branch-loss and equipment constraints: all estimated paths are at or below 18 dB, and no remote power is required. It is a candidate design rather than a guaranteed coverage result. Confirm antenna placement, actual installed losses, RSRP, and SINR on all six wings before acceptance.","[{\"constraint\": \"The source provides 20 dBm per band, and the maximum accepted passive loss is 18 dB.\", \"impact\": \"The maximum permitted loss leaves a minimum of 2 dBm at an antenna input; the estimated 13–17 dB branch losses leave 3–7 dBm.\", \"resolution\": \"The stated branches meet the supplied loss limit. The margin is smallest on the 17 dB branches, so those runs should be verified during commissioning; adding unbudgeted splitters or feeder length could consume the margin.\"}, {\"constraint\": \"Only passive equipment may be installed outside the communications room.\", \"impact\": \"Remote amplifiers or powered distribution nodes cannot be used to compensate for a long or lossy branch.\", \"resolution\": \"Keep the distribution passive and use the planned riser, floor splitters, and wing branches. This makes the loss limit especially important: any branch exceeding it requires a revised passive layout or a change to the equipment constraint.\"}, {\"constraint\": \"Coverage targets are at least -95 dBm RSRP and 5 dB SINR in occupied areas.\", \"impact\": \"Antenna-input power alone does not establish indoor field strength or interference performance; propagation, antenna placement, and the source environment also affect the result.\", \"resolution\": \"Retain the distributed antenna layout as the candidate topology, then verify the targets with a site-specific coverage assessment and walk test. If a zone fails, adjust antenna placement or branch design without exceeding the loss limit.\"}]","[{\"component_name\": \"Dual-band signal source\", \"component_type\": \"RF source\", \"served_zones\": [], \"connection_path\": \"Feeds the headend distribution port for 700 MHz and 1800 MHz; the output is carried to the vertical riser.\", \"design_rationale\": \"The stated source provides 20 dBm per band, which is the starting level for the supplied passive-loss budget.\"}, {\"component_name\": \"Headend distribution panel and vertical riser\", \"component_type\": \"Passive distribution panel and feeder\", \"served_zones\": [\"Floor 1 east wing\", \"Floor 1 west wing\", \"Floor 2 east wing\", \"Floor 2 west wing\", \"Floor 3 east wing\", \"Floor 3 west wing\"], \"connection_path\": \"Connects the source to the riser feeder and carries both bands to floor-level splitters.\", \"design_rationale\": \"A shared riser avoids separate source equipment on each floor; its losses are included in the provided branch estimates.\"}, {\"component_name\": \"Floor-level two-way splitters, one per floor\", \"component_type\": \"Power splitters\", \"served_zones\": [\"Floor 1 east wing\", \"Floor 1 west wing\", \"Floor 2 east wing\", \"Floor 2 west wing\", \"Floor 3 east wing\", \"Floor 3 west wing\"], \"connection_path\": \"Each splitter takes its input from the vertical riser and provides separate outputs to the east- and west-wing branches on that floor.\", \"design_rationale\": \"The floor-by-floor split matches the six-zone layout and keeps the branches distinct for balancing and troubleshooting.\"}, {\"component_name\": \"Wing feeder branches\", \"component_type\": \"Coaxial feeders and directional taps\", \"served_zones\": [\"Floor 1 east wing\", \"Floor 1 west wing\", \"Floor 2 east wing\", \"Floor 2 west wing\", \"Floor 3 east wing\", \"Floor 3 west wing\"], \"connection_path\": \"Each branch runs from a floor splitter along its wing and connects to three ceiling antennas through feeder sections and directional taps.\", \"design_rationale\": \"Separate east- and west-wing runs follow the coverage zones; the branch loss estimates account for the associated passive components.\"}, {\"component_name\": \"Ceiling antenna groups\", \"component_type\": \"Indoor antennas\", \"served_zones\": [\"Floor 1 east wing\", \"Floor 1 west wing\", \"Floor 2 east wing\", \"Floor 2 west wing\", \"Floor 3 east wing\", \"Floor 3 west wing\"], \"connection_path\": \"Three antennas per wing connect at the planned tap points on that wing's feeder branch.\", \"design_rationale\": \"Distributed antenna locations provide coverage across each wing rather than relying on a single central radiator.\"}]","{\"design_question\":\"A two-level underground parking facility has four zones: the north and south areas on B1, and the north and south areas on B2. The target is at least -95 dBm RSRP in 95% of occupied parking areas. A passive source in the riser room provides 17 dBm per band at 850 MHz and 1900 MHz. The planning criterion requires at least 3 dBm at each antenna input, so the maximum permitted passive path loss is 14 dB. The supplied path estimates, including splitters, feeders, and connectors, are 9 dB for B1 north, 11 dB for B1 south, 16 dB for B2 north, and 19 dB for B2 south. Active equipment and additional power are prohibited in the garage, and the source cannot exceed 17 dBm per band. What topology can be laid out, and do the stated constraints permit all four zones to meet the design criterion?\",\"topology_summary\":\"A passive star from the riser room can distribute the two bands to separate branches for the four parking zones, with antenna groups placed in each zone. However, the supplied path estimates show that the B2 north and B2 south branches exceed the 14 dB maximum loss by 2 dB and 5 dB, respectively. The passive layout can meet the stated antenna-input criterion for the two B1 branches, but it cannot meet it in all four zones without changing a constraint or reducing the B2 path losses.\",\"design_conclusion\":\"The proposed passive star is only partially feasible. The B1 branches meet the 14 dB loss limit, but the B2 north and south branches exceed it, leaving antenna-input levels below the required 3 dBm. As specified, the design cannot satisfy the criterion in all four zones. A compliant conclusion requires reducing B2 path losses to 14 dB or less, or formally changing the no-active-equipment, power, or input-level constraints; coverage must then be verified on site.\",\"constraint_analysis\":\"[{\\\"constraint\\\": \\\"The source is limited to 17 dBm per band, and each antenna input must receive at least 3 dBm.\\\", \\\"impact\\\": \\\"The maximum allowable loss is 14 dB. B1 north and south meet this criterion, while both B2 paths fall short at their antenna inputs.\\\", \\\"resolution\\\": \\\"Keep the source at its permitted level and treat the supplied path-loss estimates as binding. Increasing source power is not a compliant remedy; the B2 paths need lower loss or a formally revised design constraint.\\\"}, {\\\"constraint\\\": \\\"The estimated path losses are 9 dB, 11 dB, 16 dB, and 19 dB for B1 north, B1 south, B2 north, and B2 south.\\\", \\\"impact\\\": \\\"The B1 paths leave 8 dBm and 6 dBm at the antenna inputs. The B2 paths leave 1 dBm and -2 dBm, below the 3 dBm minimum by 2 dB and 5 dB.\\\", \\\"resolution\\\": \\\"Retain the B1 branches as planned. For B2, first investigate whether shorter feeder routes or fewer passive losses can bring each path to 14 dB or less. If not, the passive-only and no-additional-power constraints conflict with the required antenna-input level.\\\"}, {\\\"constraint\\\": \\\"Active equipment and additional power are prohibited in the garage.\\\", \\\"impact\\\": \\\"Remote units or amplifiers cannot be placed near B2 to overcome its excess feeder loss under the current rules.\\\", \\\"resolution\\\": \\\"Consider only passive rerouting or other passive loss reductions within the permitted installation rules. If these cannot reduce B2 losses sufficiently, obtain approval to change an equipment or power constraint before claiming a compliant all-zone design.\\\"}, {\\\"constraint\\\": \\\"The target is -95 dBm RSRP in 95% of occupied parking areas.\\\", \\\"impact\\\": \\\"Meeting the antenna-input power criterion is necessary for the stated planning approach but does not alone prove the area-level RSRP target, and the B2 input shortfall makes the current design noncompliant even before coverage validation.\\\", \\\"resolution\\\": \\\"Resolve the B2 path-budget failure first, then validate RSRP across all four zones by site survey. Do not treat the passive topology alone as evidence that the 95% coverage target has been achieved.\\\"}]\",\"topology_components\":\"[{\\\"component_name\\\": \\\"Dual-band passive source\\\", \\\"component_type\\\": \\\"RF source\\\", \\\"served_zones\\\": [], \\\"connection_path\\\": \\\"Feeds both bands from the riser room into the passive distribution network.\\\", \\\"design_rationale\\\": \\\"The source is fixed at 17 dBm per band and cannot be increased under the stated equipment constraint.\\\"}, {\\\"component_name\\\": \\\"Riser-room distribution panel\\\", \\\"component_type\\\": \\\"Passive distribution panel\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\", \\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Connects the source to four zone-specific feeder branches routed from the riser room to B1 and B2.\\\", \\\"design_rationale\\\": \\\"A star arrangement makes each zone's path identifiable and allows its loss to be compared directly with the 14 dB criterion.\\\"}, {\\\"component_name\\\": \\\"B1 feeder branches\\\", \\\"component_type\\\": \\\"Coaxial feeders and passive splitters\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\"], \\\"connection_path\\\": \\\"Two separate branches run from the distribution panel to the B1 north and south antenna groups.\\\", \\\"design_rationale\\\": \\\"The stated 9 dB and 11 dB path losses are below the 14 dB limit, leaving 8 dBm and 6 dBm, respectively, at the antenna inputs under the supplied source level.\\\"}, {\\\"component_name\\\": \\\"B2 feeder branches\\\", \\\"component_type\\\": \\\"Coaxial feeders and passive splitters\\\", \\\"served_zones\\\": [\\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Two separate branches run from the distribution panel to the B2 north and south antenna groups.\\\", \\\"design_rationale\\\": \\\"The branches preserve zone separation, but their stated 16 dB and 19 dB path losses exceed the permitted loss and therefore do not meet the antenna-input criterion as currently routed.\\\"}, {\\\"component_name\\\": \\\"Parking-zone antenna groups\\\", \\\"component_type\\\": \\\"Indoor antennas\\\", \\\"served_zones\\\": [\\\"B1 north\\\", \\\"B1 south\\\", \\\"B2 north\\\", \\\"B2 south\\\"], \\\"connection_path\\\": \\\"Each group connects to its corresponding zone feeder branch and distributes the signal within that parking area.\\\", \\\"design_rationale\\\": \\\"Separate antenna groups align with the four defined coverage zones. Their placement can be optimized, but it cannot compensate for an antenna-input level below the stated criterion.\\\"}]\"}","MOBIUSI INC","https:\u002F\u002Fstatic.mobiusi.com\u002Fmobiwusi\u002F20250829\u002F7bf4ac62b4533e2b809998a6f1c5491e.png?Expires=1792463130&OSSAccessKeyId=LTAI5tH8MQqhgeiAtrzCHrxM&Signature=v6Tr8jBrdm4s5wU1SnnyGsYg%2Bhw%3D&x-oss-process=image%2Fresize%2Cm_fill%2Cw_35%2Ch_35",[665,671],{"type":666,"title":667,"count_data":668},"bar","Length distribution",[669],{"name":670,"value":483},"1k lower",{"type":672,"title":673,"count_data":674},"pie","Language distribution",[675],{"name":676,"value":483},"English"]