WiNetworks WiN5213-2 User manual

M/N:
MDOC
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CPE4
3
1
0
Version: 4.3
Revision: 1.1
Date: July 008
User’s Manual & Installation Guide for:
WiN5200 Series Outdoor CPE
WiNetwor s Win-MaxTM 802.16e

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO
CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL
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BETWEEN WINETWORKS AND ANY OTHER COMPANY.

WiN5200 Table of Contents | 3
Table of Contents
Introduction ...................................................................................................... 5
1.1 About this Manual ............................................................................................................... 6
1.2 General Description ............................................................................................................ 6
1.2.1 Features .................................................................................................................... 7
1.3 Pac age Components and Unpac ing ............................................................................ 7
1.4 Safety Information ............................................................................................................... 7
Product Description ......................................................................................... 9
2.1 Introduction ........................................................................................................................ 10
2.2 IEEE 802.16e Mobile WiMAX Compliance ................................................................... 11
2.3 Bloc Diagram ................................................................................................................... 11
2.4 Features ............................................................................................................................. 12
2.4.1 Mobile WiMAX Wave 2 MIMO Features ............................................................ 12
2.4.2 Security ................................................................................................................... 14
2.4.3 Time Division Duplexing (TDD) ........................................................................... 17
2.4.4 Coding Rate ............................................................................................................ 17
2.4.5 Modulation .............................................................................................................. 17
2.4.6 Convolution Coding Error Correction .................................................................. 17
2.5 Deployment Models .......................................................................................................... 18
2.5.1 PTP Deployment .................................................................................................... 18
2.5.2 PMP Deployment ................................................................................................... 18
2.5.3 Non Line-of-Sight ................................................................................................... 18
2.5.4 Channelization ....................................................................................................... 18
2.6 Service Flows .................................................................................................................... 19
2.6.1 Service Flow Classification................................................................................... 19
2.6.2 Dynamic Service Addition .................................................................................... 19
2.6.3 Default Service Flows ........................................................................................... 19
2.6.4 Scheduling .............................................................................................................. 20
2.7 Physical Description ......................................................................................................... 21

WiN5200 Table of Contents | 4
2.7.1 Physical Interfaces Description ........................................................................... 21
2.7.2 LED Indication Description ................................................................................... 22
Mounting ......................................................................................................... 23
3.1 General ............................................................................................................................... 24
3.2 Site Survey ......................................................................................................................... 24
3.3 Pole Mounting .................................................................................................................... 25
3.4 Wall Mounting .................................................................................................................... 25
Installation Procedure .................................................................................... 26
4.1 Safety Hazards .................................................................................................................. 27
4.2 Tools and Cables Required for the Installation ............................................................ 27
4.3 Installing the WiN5200 ..................................................................................................... 27
4.3.1 Pole Mounting ........................................................................................................ 28
4.3.2 Wall Mount .............................................................................................................. 29
4.4 Cable Connections ........................................................................................................... 31
4.4.1 Installing the WiN1010 data adapter for WiN5200 ........................................... 31
Equipment Configuration and Monitoring .................................................... 34
5.1 Configuring WiN5200 Basic Parameters ....................................................................... 35
5.2 Aligning the CPE Antenna ............................................................................................... 37
5.2.1 CPE Antenna Alignment Procedure.................................................................... 38
5.2.2 Lin Indication ........................................................................................................ 39
Management ................................................................................................... 40
6.1 General ............................................................................................................................... 41
6.2 SW Download/Upgrade ................................................................................................... 41
6.3 Web-page Management .................................................................................................. 42
6.4 SNMP Management ......................................................................................................... 46
Appendix A – Product Specification ............................................................. 47
Appendix B – IDU to ODU Cable Specifications ........................................... 48
List of Acronyms ............................................................................................ 49

WiN5200 Introduction | 5
1
Introduction

WiN5200 Introduction | 6
1.1 About this anual
This manual describes the installation procedures of Wi 5200 Outdoor CPE with Ethernet
interface and is written for the installers and operators.
Wi 5213-2 and Wi 5235-2 products will be referred in this manual as Wi 5200 from now
on.
The Wi etworks Wi 5200 is a member of the Win-Max™ E family, a line of mobile WiMAX
broadband wireless access systems based on the 802.16e mobile WiMAX standard. The Win-
Max™ E family is detailed in the System Description manual of Wi etworks.
This manual assumes that users have some experience with WiMAX technologies and
procedures.
While some safety precautions are reviewed here, this manual assumes that installers have
been trained in safe installation practices. Users, who are new to WiMAX technologies and
service procedures, should not rely on this manual for comprehensive guidance.
1.2 General Description
The WiNetworks WiN5200 ODU is a member of the Win-Max™ E
family a line of WiMAX Broadband Wireless Access systems based
on the 802.16e mobile WiMAX standard specially designed for
quadruple-play applications.
WiN5200 is a high-performance outdoor unit that provides
complete 802.16e mobile WiMAX broadband wireless access
functionality to a range of indoor multi-service gateways.
The WiN5200 enables the full scope of triple-play (including
telephony data Video-on-Demand) over the WiMAX network. In
the home triple play services are distributed to a single gateway
for a simple home-networking solution.
The WiN5200 is based on the IEEE 802.16e standards to effectively
meet the unique requirements of the wireless Metropolitan Area
Network (MAN) environment and to deliver broadband access
services to a wide range of customers. Specifically designed for
point-to-multipoint broadband wireless access applications the
WiN5200 provides efficient use of the wireless spectrum
supporting a range of user environments. The access and
bandwidth allocation mechanisms accommodate hundreds of
subscriber units per sector supporting differentiated services to a
multiple of end-users.

WiN5200 Introduction | 7
1.2.1 Features
• Intelligent WiMAX subscriber unit for wireless triple-play service delivery
• Outdoor unit with ETH interface to indoor unit
• Automatic, self-configured, plug-n-play
• Supporting 1.X, 2.X and 3.X GHz bands
1.3 Package Components and Unpacking
Check that the package contains:
1. Wi 52xx ODU with integrated flat antenna
2. Pole/wall mounting hardware
In case of damage, contact the shipping company.
1.4 Safety Information
RF E posure
The Wi 5200, an outdoor CPE, is compliant with the requirements set forth in CFR 47 section
1.1307, addressing RF Exposure from radio frequency devices as defined in OET Bulletin 65.
The outdoor CPE should be positioned more than 0.6 feet (20 cm) from humans.
Lightning Protection
When Wi 5200 is installed in an outdoor location, all indoor components (Ethernet, power
supply) should be connected through a lightning protector.
The purpose of the lightning protection is to protect people and equipment located indoors
from lightning that might strike the Wi 5200 or its outdoor cables. Therefore, the lightning
protector device should be installed indoors, as close as possible to the point where the cables
enter the building. The lightning protector can also be installed outdoors, as long as the cables
that lead from it indoors are well protected from lightning between the box and the building
entrance.
Power Cord Protection
The Wi 5200 should always be connected to the Wi 1010 data adapter for both power
supply and data transfer purposes.
Any other type of connection/application of the Wi 5200 and/or Wi 1010 is not allowed.
Route all power supply cords so that people cannot walk on them, or place objects on or
against them. This can pinch or damage the cords.

WiN5200 Introduction | 8
Servicing
Do not open the cover of this product and perform corrective actions unless instructed to do
so in the operating instructions.
Outdoor Grounding System
Verify that the antenna or cable system is grounded (earthed).
The antenna is an integral part of the CPE.
The CPE (antenna) installation must be as per Article 810 of the EC. Of particular note is the
requirement that the grounding conductor not be less than 10 AWG (Cu). The scheme should
be either in accordance with UL 96 and 96A. Lightning Protection Components and
Installation Requirements for Lightning Protection Systems, or tested in accordance with UL
50 and UL 497.
CAUTION
To reduce the risk of fire, use only o. 26AWG or larger telecommunication line cord
between the indoor and outdoor units.
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications to this equipment not expressly approved by Wi etworks Ltd.
could void the user’s authority to operate the equipment.

WiN5200 Product Description | 9
2
Product Description

WiN5200 Product Description | 10
2.1 Introduction
The Wi 5200 ODU CPE is an IEEE 802.16-2005 compliant wireless device for deployment of
point-to-multipoint (PMP) and point-to-point (PTP) network architectures.
The Wi 5200 ODU CPE is an outdoor device. The Wi 5200 ODU CPE is WiMAX Forum
802.16e Wave 2 (MIMO) Certified subscribers. Each subscriber registers and establishes a bi-
directional data link with the base station sector controller.
The CPE terminals are grouped into two classes, Outdoor CPEs and Residential Gateways
(RG) which are indoor units. The relationship between all the units is illustrated below.
House
RG
WiN1030-1
RG
WiN1020-1
RG
WiN1010-1
CPE
WiN52xx
BST
WiN70xx
CPE
WiN52xx
CPE
WiN52xx
Figure 2-1: Functional Overview of the CPEs

WiN5200 Product Description | 11
The base station is connected to the head-end over IP Backhaul or via wireless channels. The
outdoor CPEs are connected to the base station over wireless channels. The outdoor CPE is
connected to the indoor residential gateway over Ethernet or coaxial networks.
2.2 IEEE 802.16e obile Wi AX Compliance
The IEEE 802.16-2005 specifications describe a PMP broadband wireless access standard for
systems. This standard includes descriptions for both the Media Access Control (MAC) and
the physical (PHY) layers.
The Wi 5200 ODU CPE is compliant to IEEE 802.16-2005 WiMAX forum Wave 2 profile.
Note
The 802.16e standards are subject to amendment, and Win-MaxTM product family design compliance
applies to a specific revision of the standard. The Win-MaxTM product family does not support mesh
communication (direct subscriber-to-subscriber).
Wi etworks is an active member of the IEEE 802.16e standards committee and has been
instrumental in creating the original 802.16e standards. Wi etworks is also active in
recommending, writing and following-up on new amendments to the 802.16e specifications.
Wi etworks is an active member of the WiMAX Forum™ and is participating in
interoperability testing in the WiMAX Forum.
2.3 Block Diagram
The CPE consists of the following modules:
1. Base-Band board – including the WiMAX 16e MIMO Base-Band SoC (running the 16e
MAC + PHY) plus the User Interface plus the analog front end that interface the RF
module.
2. Power Supply board– DC/DC power supply. Converts the 48VDC to the various voltages
that are feeding the Digital and the RF modules
3. RF board - Single transmit dual receive module that modulate the analog WiMAX signal
input from the Base-Band modem to the high frequency RF output. Several RF modules
exist - each supporting different frequency band.
4. Chassis
5. Antenna – Integrated dual polarization antenna to support the MIMO schemes

WiN5200 Product Description | 12
Figure 2-2: WiN5200 Bloc Diagram
2.4 Features
2.4.1 obile Wi AX Wave 2 I O Features
Multiple-Input, Multiple-Output (MIMO) describes systems that use more than one radio and
antenna system at each end of the wireless link. In the past it was too costly to incorporate
multiple antennas and radios in a subscriber terminal. Recent advances in radio
miniaturization and integration technology now makes it feasible and cost effective.
Combining two or more received signals has the immediate benefit of improving received
signal strength, but MIMO also enables transmission of parallel data streams or greater
throughput. For example, in a 2 x 2 MIMO (two transmit and two receive elements), dual
polarization point-to-point system, the carrier’s allocated frequency can be used twice,
effectively doubling the throughput data rate.
In point-to-multipoint systems employing MIMO, each base station antenna transmits a
different data stream and each subscriber terminal receives various components of the
transmitted signals with each of its subscriber antennas as illustrated in the figure below. By
using appropriate algorithms, the subscriber terminal is able to separate and decode the
parallel simultaneously received data streams.

WiN5200 Product Description | 13
Figure 2-3: MiMo Antenna System
2.4.1.1 Space-Time Coding
Space-time coding (STC) is a technique for implementing transmission diversity. Mobile
WiMAX uses transmit diversity in the downlink direction to provide spatial diversity that
enhances the signal quality to a specific subscriber located anywhere within the range of the
antenna beam. Although providing less signal gain than beam-forming, transmit diversity is
more robust for mobile users since it does not require prior knowledge of the path
characteristics of a subscriber’s particular frequency channel. One such STC technique,
known as the Alamouti Code, was published in 1998[4] and has been incorporated into the
WiMAX 16e standard.
MiMo
MiMo

WiN5200 Product Description | 14
2.4.2 Security
Security was a key failing of older broadband wireless systems of the past. The why of it is
easy to comprehend---any network that transmits its data across wireless signals rather than
wires is inherently more open to interference, intrusion or assault. This does not mean solid
broadband wireless security is impossible, just much more difficult.
As broadband wireless networks have matured security features have improved. With the
advent of WiMAX, the security toolsets available to broadband wireless service providers
have reached all time highs of functionality. Today's WiMAX networks can be secured more
effectively than ever before.
WiMAX and IEEE 802.16 Security Sub layer provides for privacy, authentication and
confidentiality across the broadband wireless network. Defined initially by IEEE 802.16-2004
and then corrected and amended by Corrigendum 1 and IEEE 802.16e-2005 respectively, the
Security Sub layer now supports Fixed and Mobile operation.
There are two major differences between the standards. The first difference is that the security
mechanism of the IEEE 802.16-2004 is based on the DOCSIS standard. In the 802.16e-2005
many changes have been made in the security mechanisms. The second difference is in the
flexibility of SS's connection characteristics with the BST. The IEEE 802.16-2004 only supports
fixed access. In fixed access, an SS cannot mitigate to the air interface of a new Base Station
(BST) without performing the network entry again after a connection termination. The IEEE
802.16e-2005 supports mobile access. Mobile access enables an SS to move between various
BST cells while keeping the connection established.
There are five primary aspects of WiMAX security that should be considered when designing
a security plan for a WiMAX network. These range from mitigation techniques at the physical
layer to improved wireless authentication and encryption to intrusion protection and data
transport security. At each level, choices in implementation and security levels can be made;
although in the case of the physical layer options are limited.
2.4.2.1 Physical Layer Security
There are two basic types of attacks that can affect the physical layer of WiMAX. One is
jamming and the other is packet scrambling. The first is relatively straightforward, and is
sometimes the result of interference rather than an attack. Jamming consists of a stronger
signal than the WiMAX network overwhelming network data feeds either in intermittent
bursts or with sustained carrier waves.
Since most WiMAX network services are delivered over licensed bands (currently 3.5 GHz
internationally and 2.5 GHz both internationally and in the US), this offers spectrum
relatively quiet from accidental interference. Accidental interference in licensed spectrum
cannot always be completely discounted as there is a possibility of second and third harmonic
interference waves, for example, from much lower frequency signals if those are in close
proximity to the WiMAX antenna systems or that cross them with a signal close enough in
physical proximity to locally overload the WiMAX signal. In practice, this is rare.

WiN5200 Product Description | 15
Packet scrambling is an attack that occurs when control packets in the respective downlink
and uplink subframes are sniffed then scrambled and returned to the network. This attack is
much harder to mount than a jamming attack. Since most WiMAX networks today use time
division duplexing (TDD), to include the Win-Max™ system, an attacker can parse this
timing sequence and capture control data, the preamble and map, scramble them and send
them back with correct timing to interrupt legitimate signal, resulting in slowdowns and
effectively lowered bandwidth. Intercepted and scrambled packets are possible with
frequency division duplexing (FDD) as well which transmits both the uplink and downlink
simultaneously, but it is even harder to exploit this attack than with TDD systems.
While it may seem the physical layer is inherently most vulnerable as the security elements of
WiMAX are located at higher layers, the fact is hackers can often find lower hanging fruit in
terms of useful exploits higher in the stack, because as WiMAX supports multiple selections
on what service providers can choose to implement in terms of authentication, sometimes the
door can be left open for them by the choices made.
2.4.2.2 Authentication
Traditionally the first level of security authentication for older broadband wireless
technologies has been MAC authentication and WiMAX supports this, although providers
don't settle for this method. This technique allowed service providers to log permitted MAC
device addresses and allow only those addresses to access the network. Hackers long ago
figured out how to spoof these. If a base station is not set up with adequate authentication
measures, an attacker can capture control packets and pose as a legitimate subscriber even
with older MAC device authentication enabled.
A second, newer and much better choice, embraced by the Win-Max™ system, is the built in
support for X.509 device certificates embedded with the use of extensible authentication
protocol---transport layer security (EAP-TTLS) method, added with the 802.16e standard and
WiMAX Forum.
Enter the EAP-TLTS authentication method. This technique allows both the subscriber and
the base station to authenticate each other using an X.509 method for both, in addition to a
subscriber authentication which is based on well-known subscriber authentication techniques
such PAP and MS-CHAP. MAC control headers are never encrypted in WiMAX, however
with EAP carriers can choose to authenticate them (but they don't necessarily have to). This
capability adds an additional layer of authentication confirmation. It's an operator specific
guideline decision and is tunable in the Win-Max™ system.
2.4.2.3 Encryption
Clearly the first layer of defense for WiMAX operators is to authenticate a legitimate user on
its network. However, WiMAX, with its 802.16e ratification, offers top line tools for
encryption of data. Older wireless iterations used the data encryption standard (DES) which
relied on a 56-bit key for encryption. This is largely considered obsolete. WiMAX 802.16e
certainly supports DES (3DES) but it also adds support for the Advanced Encryption

WiN5200 Product Description | 16
Standard (AES) which supports, 128-bit, 192-bit or 256-bit encryption keys. Also AES meets
the Federal Information Processing Standard (FIPS) 140-2 specification, required by
numerous governmental branches. This technology, which requires dedicated processors on
board base stations, is robust and highly effective.
Traffic encryption may be employed per 802.16 Service Flow and is subject to operator policy.
The relevance of encryption to the network operator deployment is questionable. In the past,
for example, many cellular carriers focused on authentication and mostly ignored encryption.
Whether that will change as mobile service providers ramp up more broadband applications
is an open question.
The downside to these heavy computing tasks (i.e. authentication and encryption) is that all
of this requires processor cycles, which may affect the performance of the system.
evertheless, the Win-Max™ system and especially, the SS and BST, which are the entities
that take active role in heavy security-related computations, were built bottom to top with a
design goal of offloading heavily computing tasks from the host processor to a specific circuit.
Consequently, no performance degradation is neglected.
2.4.2.4 Third Party Intrusion Protection
We examined WiMAX authentication schemes, which are a major component of a secure
network. And we also spoke of data encryption. Clearly, WiMAX possesses solid tools
already built in. But there are considerations beyond just good security that can drive a
migration to third party intrusion detection and protection tools---namely business case
elements. Intrusion protection is however, not data protection. These are two different classes
of solution. Certainly, a good third party intrusion protection can monitor and secure a
network's authentication. However, many solutions also offer worm protection, Trojan horse
protection, defenses against viruses, backdoor exploits and denial of service attacks to name a
few. Some of these elements are almost a business necessity for a wireless service provider
and may justify the cost of an additional security suite initially. For other companies, a
migration strategy to enhanced tools makes the most cost effective sense.
A good place to start is examining market and service scenarios. If your customer base is
highly sensitive to data integrity (financial sector or hospital customers) third party intrusion
prevention systems can help segment customers from each other better as well as secure them
from outside attack.
Or in another example, a mobile network that offers just Internet access and voice may wish
to abrogate responsibility for data encryption and use session initiation protocol (SIP)
signaling for its VoIP and WiMAX native authentication tools.
Referring to encryption, clearly an AES supported data encryption system gives WiMAX
excellent security in this regard. However, additional solutions that meet customer needs
such as virtual private networks may enhance the business model and provide additional
source of revenue.

WiN5200 Product Description | 17
In the following two clauses, two revolutionary applications targeted at specific market
segments are described. These applications of WiMAX for DBS & DVB-T operators and
WiMAX for Cable operators distinguish Wi etworks from other players in the WiMAX
industry.
etwork Access Providers can easily provide fast Internet and advanced data service to their
deployed network by using the Wi etworks WiMAX-based technology solution.
2.4.3 Time Division Duplexing (TDD)
The Wi 5200 CPE uses time division duplexing (TDD) to transmit and receive on the same
RF channel. This is a non-contention based method for providing an efficient and predictable
two-way PTP or PMP cell deployment. All uplink and downlink transmission scheduling is
managed by the base station. The base station sends data traffic to subscribers, polls for grant
requests, and sends grant acknowledgements based on the total of all traffic to all subscribers.
2.4.4 Coding Rate
Each burst of data transmitted over the wireless interface is padded with redundant
information, making it more resistant to potential over-the-air errors. The coding rate is the
ratio of user data to the total data transmitted including the redundant error correction data.
The base station supports coding rates of 1/2, 2/3, and 3/4.
2.4.5 odulation
The modulation technique specifies how the data is coded within the OFDMA carriers. The
base station supports QPSK, 16 Quadarature Amplitude Modulation (QAM), and 64 QAM
modulations.
2.4.6 Convolution Coding Error Correction
Convolution Coding (CC) error correction is enabled for all traffic rates. This low-level
process can correct bursts of errors in received messages and reduce the number of
retransmissions.

WiN5200 Product Description | 18
2.5 Deployment odels
The CPE supports point to point (PTP) and point to multipoint (PMP) deployment scenarios.
2.5.1 PTP Deployment
When deployed in a PTP configuration the base station establishes a dedicated bidirectional
link to a single subscriber. The PTP deployments typically use a directional narrow beam
antenna for both ends of the link.
2.5.2 P P 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.
2.5.3 Non Line-of-Sight
The WinMAX product family supports line-of-sight (LOS) and non line-of-sight ( LOS)
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.
2.5.4 Channelization
The CPE 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 CPE 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.

WiN5200 Product Description | 19
2.6 Service Flows
Service flows are a key feature of the 802.16e standard.
A Service Flow represents a unidirectional data flow having separate QoS settings for uplink
and downlink. Service flows provide the ability to set up multiple connections to each
subscriber in a sector.
Separate service flows can be established for uplink and downlink traffic, where each service
flow is assigned a unique service level category and separate QoS settings. This feature allows
segregation of high-speed/high-priority traffic from less time-critical flows.
2.6.1 Service Flow Classification
Data packets are forwarded based on classification rules. Classification rules require
examining each packet for pattern matches such as destination address, source address, IP
TOS, or VLA tag. All classification is defined at the base station and the classification
parameters are downloaded to the subscriber.
2.6.2 Dynamic Service Addition
Service flows are defined and stored in the base station. For each service flow to be
established, the base station sends a setup message to the subscriber specifying the required
set of QoS parameters. The subscriber responds to each request by accepting or rejecting the
setup message.
A service flow may be pre-provisioned or can be dynamically created and deleted without
service outage. This is useful for supporting multiple subscribers in a single sector. ew
subscribers can be added and existing subscribers can be removed or have service levels
modified.
Setup messages are sent by the base station following any subscriber power-cycle, loss and
recovery of the wireless link to a subscriber, or any service flow add/delete operation at the
base station.
2.6.3 Default Service Flows
Default UL/DL service flows are created automatically for each registered subscriber.
These service flows are used to pass all traffic not matching any user-defined service flow
(such as broadcast ARP) between the base station and subscribers. The default service flow
capacity is limited for each subscriber.

WiN5200 Product Description | 20
2.6.4 Scheduling
The base station enforces QoS settings for each service flow by controlling all uplink and
downlink traffic scheduling. This provides non-contention based traffic model with
predictable transmission characteristics. By analyzing the total of requests of all subscribers,
the base station ensures that uplink and downlink traffic conforms to the current service level
agreements (SLAs). Centralized scheduling increases predictability of traffic, eliminates
contention, and provides the maximum opportunity for reducing overhead.
A regular period is scheduled for subscribers to register with the base station. These
subscribers may be newly commissioned or have been deregistered due to service outage or
interference on the wireless interface. This is the only opportunity for multiple subscribers to
transmit simultaneously.
Real-Time Polling Service (rt-PS)
The base station schedules a continuous regular series of transmit opportunities for the
subscriber to send variable size data packets. The grant size is based on the current data
transfer requirement. Typical applications include streaming MPEG video or VOIP with
silence suppression. This is efficient for applications that have a real-time component and
continuously changing bandwidth requirements.
E tended Real-Time Polling Service (ert-PS)
The base station schedules a continuous series of transmit opportunities for the subscriber to
send variable size data packets. This schedule supports real-time applications including VoIP
with silence suppression. The dynamically scheduled grants guarantee reserved bandwidth
and reduce latency introduced by repetitive grant requests. The service flow will not transmit
packets larger than nominal grant interval.
Non-Real-Time Polling Service (nrt-PS)
The base station schedules regular transmit opportunities for the subscriber to send variable
size data packets. Typical applications may include high bandwidth FTP. The polling period
may typically be one second or less, even during periods of network congestion.
Best Effort (BE)
The base station schedules transmit opportunities for the subscriber to send traffic based on
unused bandwidth after all higher level traffic scheduling requirements are serviced.
Typical applications may include Internet access and email. Best effort service flows can be
assigned a priority of 0 to 7.
Unsolicited Grant Service (UGS)
The base station schedules a continuous series of transmit opportunities for the subscriber to
send fixed size data packets. This schedule supports real-time applications including VoIP or
TDM transport. The UGS pre-scheduled grants guarantee reserved bandwidth and reduce
latency introduced by repetitive grant requests. The service flow will not transmit packets
larger than nominal grant interval.