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They Communicate with. Guaranteed access to the system, reliability and availability is very
important.
Coverage: Ensuring Ubiquitous, Reliable, Consistent coverage to all users with in the organization's
operational boundaries ( ability to guarantee coverage in different environments such as in-building,
in subways, rural areas)
Capability: Provide for the unique communications needs of the work-team (types of features and
applications )
- Instant communications, 1to1 and 1-many, centralized dispatch, security, ruggedized units, high
power
Capacity: Simultaneous accommodation of all Data and Communications needs between multiple
users at any given time. Unpredictable nature of mission critical communications given capacity is
acceptable 90% of time but need for system capacity increases exponentially in case of emergency.
Its a big problem if the system is not designed to handle it.
Costs: Best mix of Technologies and Services to Ensure Cost-Effective Communications. Trade-off
between capital vs operating budget (purchase units as capital and use free airtime vs lease units
and pay airtime (Op expense). For mission critical usually demand value for dollars but less willing to
compromise control, capabilities coverage and capacity in regards to price.
示例：某機場
Main
Terminal
Bldg
Admin
Bldg
Satellite Bldg A
Engrg
Bldg
Contact Pier
機場航站樓室內覆蓋
典型室內覆蓋設計
Use example to illustrate integration with existing system.
For example, Police National Computer (PNC) in UK is an existing
database, where licence plate search application was integrated. This
allowed police on the roads/motorways to make checks as and when
necessary. Previously, police would have had to call Dispatch Centre
to raise search, taking up valuable time and tying up two people –
police office & control room - to perform a simple task.
機場航站樓室內覆蓋
室內覆蓋設計考慮
• 室內覆蓋設計考慮的因素:
– 設備規范要求
– 系統余量
• 確定設計參數后，在計算:
– 功放的增益
– 漏纜類型和型號
• 反復計算Donor
Station
Pickup
Antenna
LCX
(91.44m)
BDA
6.4km
0.6 Fresnel
Clearance
12.2m
Use example to illustrate integration with existing system.
For example, Police National Computer (PNC) in UK is an existing
database, where licence plate search application was integrated. This
allowed police on the roads/motorways to make checks as and when
necessary. Previously, police would have had to call Dispatch Centre
to raise search, taking up valuable time and tying up two people –
police office & control room - to perform a simple task.
機場航站樓室內覆蓋
• 根據建筑結構
– 每層分別設計
– 確定最合適的方案
• 確定用天線還是漏纜
RF
Feed
RF
Feed
RF
Feed
RF
Feed
RF
Feed
RF
Feed
RF
Feed
Use example to illustrate integration with existing system.
For example, Police National Computer (PNC) in UK is an existing
database, where licence plate search application was integrated. This
allowed police on the roads/motorways to make checks as and when
necessary. Previously, police would have had to call Dispatch Centre
to raise search, taking up valuable time and tying up two people –
police office & control room - to perform a simple task.
虛擬隔離網(VPN)
• 口令保護
• 每個用戶組織有多級的接
入權限
– 按應用和按職能
• 安全隔離
– 數據庫隔離:
• 按地理位置或地區
• 按部門或機構
• 按應用
• 按用戶或操作者
RADIO MAINTENANCE
REGIONS SUBSCRIBER CONFIGURATION
ACCESS CONTROL
CENTRAL
Airlines
Airport
SECURITY
AIRLINES
AIRPORT OPS
RADIO
DISPATCH
MANAGER
SYSTEM MANAGER DISPATCHER
ZONEWATCH
REPORTS
MANAGER
ZONEWATCH
MAINTENANCE
APPLICATIONS
Authority
各個用戶組織可以共享基礎設施并隨虛擬網隔離
800兆模擬系統到TETRA的平穩過渡
對于一個幾乎需要全天候實時工作的關鍵系統，需要精心策劃和各方的
緊密配合，以實現模擬到數字的平穩過渡，和100％的通信保障率，化
解風險。
主要問題：
• 新系統需要一個優化和穩定的過程
• 用戶需要熟悉新終端的操作
• 用戶需要熟悉新的呼叫流程
• 新舊系統共存的期間，跨系統呼叫
如何實現
• 應急通信預案和保障措施
主要對策：
• 經過市場檢驗的成熟系統
• 盡量減少操作上的差異
• 培訓
• 需要技術解決方案
　
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航空翻譯 www.aviation.cn
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