GB/T 51244-2017 in English
VALIDCode for engineering technology of tunrtei coverage of public mobile telecammunications
- Issued on:2017-05-27
- Implemented on:2018-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
$592.00
| Standard No: | GB/T 51244-2017 |
| Document status: | VALID |
| Title in English: | Code for engineering technology of tunrtei coverage of public mobile telecammunications |
| Title in Chinese: | 公众移动通信隧道覆盖工程技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2017-05-27 |
| Implemented on: | 2018-01-01 |
| Professional Classification: | GB-National Standard |
| Related Keywords: | public mobile telecammunications introduction specification framework
engineering technology technology evolution comparison 1.8-2.6ghz multi-band full-band fusion support specification tunrtei coverage |
| Related Topics: | GBT51244
GB/T 51244-2017 Tunnel engineering waterproofing technical specifications microdisk Communication Engineering Technical Specifications and |
Introduction
Specification Framework and Technology Evolution
Comparison of major revisions to communication standards from 2000 to 2020:
| Technical Elements | TDMA Specification (2003) | TD-LTE Specification (2014) | Improvements in this version |
|---|---|---|---|
| Frequency Band Support | 900/1800M Single-Band | 1.8-2.6GHz Multi-Band | Full-Band Fusion Support |
Specification for Implementation of Special Scenarios
Case study of cable laying in high-speed railway tunnels
- Rail height limit: 1.8-2.8mError range ±5cm
- Spacing with contact network: Minimum spacing allowed for construction 2.2m
Acceptance quality control
Three network access test requirements:
- Initial test includes voltage standing wave ratio verification (≤1.5)
- Real-time alarm rate monitoring during trial operation <5%
- Final inspection must reach GF-KPI 802.3a network availability 99.99%
Reference to specific clauses of GB8702 electromagnetic limit standard
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