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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：某机场
Main
Terminal
Bldg
Admin
Bldg
Satellite Bldg A
Engrg
Bldg
Contact Pier
机场航站楼室内覆盖
典型室内覆盖设计
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.
机场航站楼室内覆盖
室内覆盖设计考虑
• 室内覆盖设计考虑的因素:
– 设备规范要求
– 系统余量
• 确定设计参数后，在计算:
– 功放的增益
– 漏缆类型和型号
• 反复计算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.
机场航站楼室内覆盖
• 根据建筑结构
– 每层分别设计
– 确定最合适的方案
• 确定用天线还是漏缆
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.
虚拟隔离网(VPN)
• 口令保护
• 每个用户组织有多级的接
入权限
– 按应用和按职能
• 安全隔离
– 数据库隔离:
• 按地理位置或地区
• 按部门或机构
• 按应用
• 按用户或操作者
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
各个用户组织可以共享基础设施并随虚拟网隔离
800兆模拟系统到TETRA的平稳过渡
对于一个几乎需要全天候实时工作的关键系统，需要精心策划和各方的
紧密配合，以实现模拟到数字的平稳过渡，和100％的通信保障率，化
解风险。
主要问题：
• 新系统需要一个优化和稳定的过程
• 用户需要熟悉新终端的操作
• 用户需要熟悉新的呼叫流程
• 新旧系统共存的期间，跨系统呼叫
如何实现
• 应急通信预案和保障措施
主要对策：
• 经过市场检验的成熟系统
• 尽量减少操作上的差异
• 培训
• 需要技术解决方案
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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