design_question string | topology_summary string | design_conclusion string | constraint_analysis list | topology_components list |
|---|---|---|---|---|
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 lea... | 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... | 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... | [
{
"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 permitt... | [
{
"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 state... |
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 M... | 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 co... | 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... | [
{
"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 resu... | [
{
"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 su... |
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 out... | 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 suppli... | 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 w... | [
{
"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 lim... | [
{
"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, whic... |
Indoor Distributed Antenna System Topology and Coverage Design Reasoning Dataset
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.
Technical Specifications
| Field | Type | Description |
|---|---|---|
| design_question | string | The original design problem, including building zones, coverage objectives, signal source conditions, link losses, and equipment constraints. |
| topology_summary | string | An overview of the recommended indoor distributed antenna system topology and its coverage approach. |
| design_conclusion | string | A summary of the topology's feasibility, including key assumptions, risks, and any information that still needs to be provided. |
| constraint_analysis | array | An explanation of how each design constraint affects the solution and how the constraints jointly influence topology selection. |
| topology_components | array | The main equipment or network nodes in the topology, their connections, and the coverage areas they serve. |
Compliance Statement
| Authorization Type | CC-BY-NC-SA 4.0 (Attribution–NonCommercial–ShareAlike) |
| Commercial Use | Requires exclusive subscription or authorization contract (monthly or per-invocation charging) |
| Privacy and Anonymization | No PII, no real company names, simulated scenarios follow industry standards |
| Compliance System | Compliant with China's Data Security Law / EU GDPR / supports enterprise data access logs |
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