Designing a finest WiMAX network


WiMAX access point portfolio


Purpose of this document is to produce or built an understanding in Field Engineers to understand a site support of NON-OMU cities. Looking at the needs of market requirements, costumer demands, geographical status, and provisional services the network should be design in such a way that it must have a ability to address these specific requirements.


Field Engineers will boost up their abilities to increase understanding of WATEEN WIMAX network.


Wimax is that kind of technology which not only supports the grown-up market but also supports the needs of rising market that is facing challenging price restrictions.

Scenarios like fixed or mobile, indoor or outdoor in which the vast range of service applications are to be served, there is no other better technology than wimax which suits all the scenarios equally.

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Although we know that Wimax have a capability to serve vast range of applications and services but before designing the flexible wimax networks one has to keep an eye on the needs of market requirements, costumer demands, geographical status, and provisional services both for the present and future scenarios.

Furthermore, a network should be designed in such a optimal manner that it could serve operator's varying needs of service implementation at any in a future.

So Motorola in Pakistan has provided its WiMAX solutions keeping the number of users, geographical conditions and costumer power to afford such technology.

Motorola's wi4 WiMAX Flexible Access Point Portfolio can be easily configured to bear

a broad range of coverage, capacity, and application scenarios utilizing a selection of choices including

  • Macro,
  • Micro,
  • Outdoor,
  • Indoor,
  • Sectorized,
  • Omni directional,
  • Tower-top electronics,
  • Distributed electronics,
  • MIMO
  • Smart antenna techniques.

With the help of this deployment operators can think not only for today but can also judge the varying scenario of the future foot print

Basically it is comprised of a WiMAX Base Control Unit that can be paired with above discussed RF modules.

Access Point:

Access point consists of two major subsystems:

  • RF Module
  • Base control unit (BCU)

The RF module consists of two transmitter and receiver chains, two duplexer filter, two antenna element, redundant fiber optics interfaces and DC power conversion. Two transmit and receive chains provide built in MIMO support in the access point (AP). Access point is designed for up to four sector configuration with up to four RF Modules supported by a single Base Control unit (BCU).

Power connection

Fibre link


The Integrated RF architecture eradicates the need of loads of RF coaxial cables to be connected between the base control unit (BCU) to the RF Module. Further positioning the RF elements and heat sinks within the Integrated RF module more effectively supports heat dissipation and eases the cooling requirements of the base control unit.

WiMAX Base station unit

WiMAX Base station unit is the heart of any WiMAX infrastructure same like in GSM

Or any 3G networks. It is a core body of WiMAX access point. the Wimax Base station unit is designed in such an manner that it is full Weatherized, small and compact that made deployment flexible.

The Wimax base station unit with zero footprint can be mounted anywhere like poles, Shelters, existing BTS antennas of the GSM and even on the water tankers which are most likely to see in Pakistan. In Pakistan they have implemented a flexible network that is not only designed to make it compatible for future enhancements but also cost effectiveness is also considered.

The Motorola's Wimax network architecture is a simple peer to peer IP based design.

Motorola's WiMAX Access Point Control (APC) is there to provide the key to security and mobility and separate a control path from IP switches and routers.

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The base control unit (BCU) performs baseband processing, site synchronizing, power distribution and network interfacing .the BCU can reside at the bottom of the antenna tower .The BCU contains hot pluggable slots for up to two site controllers (SC) and four modem boards

Fiber link connection










Figure no: 01

The base control unit includes the following components as represented in figure No:01

  • Site Controller card
  • Modem cards
  • Alarm cards
  • Power supply
  • Fan


The site controller card is a digital processing card containing a microprocessor platform for a frequency or timing reference circuit, an Ethernet switch, and interference for backhaul and site alarms.


The modem card basically is a digital baseband card containing hostmicroprocessor, Digital microprocessors and FPGA for performing 802.16e MAC and PHY processing .the modem card allows for software only upgrades for PHY and MAC layer modifications.

The BCU includes four Modem cards and one modem card per sector.


The alarm card generate the different alarms like a cabinet alarm inputs, power supply ID information,

and interface signals to a GPS receiver.


The BCU contains slots for three main power supply units .Two power supplies are required to support a fully populated site and optional third unit.


The BCU is cooled by forced air via the air plenum.