曝光臺(tái) 注意防騙 網(wǎng)曝天貓店富美金盛家居專營(yíng)店坑蒙拐騙欺詐消費(fèi)者

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(jī)場(chǎng)
Main
Terminal
Bldg
Admin
Bldg
Satellite Bldg A
Engrg
Bldg
Contact Pier
機(jī)場(chǎng)航站樓室內(nèi)覆蓋
典型室內(nèi)覆蓋設(shè)計(jì)
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(jī)場(chǎng)航站樓室內(nèi)覆蓋
室內(nèi)覆蓋設(shè)計(jì)考慮
• 室內(nèi)覆蓋設(shè)計(jì)考慮的因素:
– 設(shè)備規(guī)范要求
– 系統(tǒng)余量
• 確定設(shè)計(jì)參數(shù)后，在計(jì)算:
– 功放的增益
– 漏纜類型和型號(hào)
• 反復(fù)計(jì)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(jī)場(chǎng)航站樓室內(nèi)覆蓋
• 根據(jù)建筑結(jié)構(gòu)
– 每層分別設(shè)計(jì)
– 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(wǎng)(VPN)
• 口令保護(hù)
• 每個(gè)用戶組織有多級(jí)的接
入權(quán)限
– 按應(yīng)用和按職能
• 安全隔離
– 數(shù)據(jù)庫(kù)隔離:
• 按地理位置或地區(qū)
• 按部門或機(jī)構(gòu)
• 按應(yīng)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(gè)用戶組織可以共享基礎(chǔ)設(shè)施并隨虛擬網(wǎng)隔離
800兆模擬系統(tǒng)到TETRA的平穩(wěn)過渡
對(duì)于一個(gè)幾乎需要全天候?qū)崟r(shí)工作的關(guān)鍵系統(tǒng)，需要精心策劃和各方的
緊密配合，以實(shí)現(xiàn)模擬到數(shù)字的平穩(wěn)過渡，和100％的通信保障率，化
解風(fēng)險(xiǎn)。
主要問題：
• 新系統(tǒng)需要一個(gè)優(yōu)化和穩(wěn)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(tǒng)共存的期間，跨系統(tǒng)呼叫
如何實(shí)現(xiàn)
• 應(yīng)急通信預(yù)案和保障措施
主要對(duì)策：
• 經(jīng)過市場(chǎng)檢驗(yàn)的成熟系統(tǒng)
• 盡量減少操作上的差異
• 培訓(xùn)
• 需要技術(shù)解決方案
　
中國(guó)航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：空管資料7(75)