Siemens RUGGEDCOM WIN5151, Руководство пользователя

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Chapter 1
Introduction
RUGGEDCOM WIN
User Guide
6 PTP Deployment
• Section 1.7.4, “Channelization”
Section 1.7.1
PTP Deployment
When deployed in a PTP configuration, the base station establishes a dedicated bidirectional link to a single
subscriber. PTP deployments typically use a directional narrow beam antenna for both ends of the link.
Section 1.7.2
PMP Deployment
When deployed in a PMP configuration, the base station establishes bi-directional links to more than one
subscriber. PMP deployments typically use a wide beam (sector) antenna at the base station and a narrow beam
antenna at the subscriber. Service flows are used to police service level agreements for each subscriber.
Section 1.7.3
Non Line-of-Sight
The WIN RUGGEDCOM WIN product family supports line-of-sight (LOS) and non line-of-sight (NLOS) operation. A
clear LOS link has no obstacles within 60% of the first Fresnel zone of the direct path.
A wireless link is considered non-LOS if natural or man-made structures block the visible path between the
base station and the subscriber. In this case, a wireless link can be established only if a reflective path can be
established between the base station and subscriber.
Section 1.7.4
Channelization
The SS is a frequency-specific system, with the frequency band defined by the PHY unit. The use of the operating
band must be in accordance with local regulation requirements.
The SS divides the available frequency band into channels. Allocation of channels during deployment is dependent
on spectrum availability in the licensed band and local licensing requirements and conditions. Channel selection
allows planners to obtain the maximum geographic coverage, while avoiding frequency contention in adjacent
sectors.
Section 1.8
Service Flows
Service flows are a key feature of the IEEE 802.16e standard. A service flow represents a unidirectional data flow
having separate Quality of Service (QoS) settings for uplink and downlink. Service flows provide the ability to set
up multiple connections to each subscriber in a sector.