CAPC

CAP-C Capacity

AP Capacity:The CAP-C is required to support a maximum of 1000 APs. The CAP-C will havea total of 5 active pCAPCs in a fully configured system. Therefore, each pCAPCand the components executing as part of that pCAPC must support a maximum of200 APs.

• Subscriber Capacity:The subscriber capacity within the CAP-C is determined by the type of traffic, themobility of that traffic, and the overall throughput that the traffic is introducingwithin the CAP-C. In WMX 1.0, total 1,000,000 subscribers can be supported bya CAP-C node and each pCAPC can support upto 200,000 subscribers.

CAP-C System Controller

The CAP-C System Controller is the Motorola ECC provided ATCA-F101 SystemController and Switching Blade. The System Controller provides both redundant layer-2switching and system management.

MPC7447 microprocessor @ 1.0 GHz• PMC-based 40GB hard disk drive• Marvell Discovery II System Controller• 512 MB ECC protected RAM• PICMG 3.0 base interface and PICMG 3.1 data interface switching (up to 1.0Gbs)

CAP-C Payload BladeThe CAP-C payload blade is the Motorola ECC provided ATCA-7221 processing blade.This processing blade will contain dual single core Intel® Xeon LV 2.8 GHz processorsrunning in two-way symmetric multi-processing mode. In addition, each CAP-C bladewill be equipped with 8 GB ECC-enabled DDR2 RAM and can be extended up to 16GBs. Each CAP-C will also be equipped with a rear transition module that comesequipped with dual GbE ports and a Fujitsu 37GB Serial Attached SCSI hard drive usedfor storing local software and logging information.

Power Entry Module (PEM)The CAP-C chassis has PICMG 3.0 compliant, dual PEMs and is rated for -40VDC to -72VDC. The PEMs plug directly into the mid-plane and deliver power to the backplane.Each input is rated for 100 Amps which is then segmented down to four individual 25

Amp circuit breakers, or four internal feeds with voltage and circuit breaker monitoringper PEM. These four feeds each power four ATCA blade or hub slots. Each PEM cansupply 200 watts of power to each blade slot. The PEMs are hot-swappable and whenusing 200W per slot PEMs, two are required to support N+1 redundancy. If the system isconfigured for redundant operation using two power supplies, they operate in loadsharing where the total load is equal to or less than what one power supply can provide.The CAP-C can operate at 200W per slot capacity with one PEM installed however thiswould not be a redundant configuration.

Shelf Management ControllerThe CAP-C contains 2 shelf management controllers referred to as SAMs, each of whichconsists of the shelf manager carrier and the shelf management mezzanine module that isinstalled on the carrier blade. Both controllers are installed in slot 0 located at the left sideof the front of the CAP-C chassis. The Shelf Management Controllers operate in anactive/ standby mode of operation.

Fan Tray Modules (FTM)The CAP-C chassis supports three upper and one lower FTM. Each upper FTM houses 4separate fans and are arranged for maximum volume air flow, even distribution, and faulttolerance. The lower FTM is a single module which is responsible for cooling all reartransition modules in the chassis. The CAP-C is required to be equipped with 3 upperFTMs and 1 lower FTM.

Rear Transition Moduel (RTM)The CAP-C System Controller will come equipped with a RTM that will provideconnectivity to external devices. 4 GbE ports will be allocated for extending the datainterface fabric to provide connectivity to an external IP network. 8 GbE ports will bereserved for future multi-chassis CAP-C support.

2.4 CAP-C Interfaces

2.4.1 CAP-C Physical InterfaceCAP-C is physically connected to the IP network via the Ethernet interface. Typically,there will be routers in between the CAP-C and other WiMAX network entities, such asAP, AAA and EMS. Each active blade (System Controller or pCAPC) of CAP-C willhave a unique IP address for communication within the IP network.

2.4.2 CAP-C Logical Interface TypesThere are three types of logical interfaces implemented in the CAP-C node for the systemcommunication and operation management. The logical interfaces are defined asfollows:• External Communication Interface• Internal Communication Interface• Operational Interface

2.4.2.1 External Communication InterfaceThis interface includes the following logical connections.• CAP-C – AP• CAP-C – CAP-C• CAP-C – AAA• CAP-C - EMS• CAP-C – RouterThe connections for CAP-C – AP, CAP-C – CAP-C and CAP-C - Router are controlledby CAP-C Link Management function. The communication between the CAP-C andAAA is being managed by the CAP-C AAA proxy server, which is the Authenticatorcomponent. For communication to the EMS, the CNEOMI-Lite Agent is implemented inthe CAP-C product and acts as the interface between the CAP-C and EMS.

2.4.2.2 Internal Communication InterfaceThe internal communication interface is implemented for message processing betweencomponents. This interface will not have exposure to the network entities outside CAP-Cnode.2.4.2.3 Operational InterfaceThe CAP-C Operational Interface consists of the following:• Local Maintenance Terminal (LMT)• CAP-C Shell AccessLMT is a web-based interface,which is used for day-to-day operations including accountmanagement, debugging CAP-C, alarm and statistics management, etc. CAP-C ShellAccess is utilized to commission the CAP-C for the first time. This interface will not beused for normal operations.

BCU

2.1 Base Control Unit (BCU)2.1.1 Site ControllerIt is primarily a digital processing card that contains a microprocessor platform for thesite level software, a frequency/timing reference circuit, an Ethernet switch, andinterfaces for backhaul and site alarms and I/O. The BCU cabinet contains slots for twosite controllers in a redundant (1+1) mode.

2.1.2 ModemIt is a digital baseband card that contains a host microprocessors, DSPs, and an FPGA forperforming 802.16e MAC and PHY processing. There are four modem slots in the BCU. The typical configuration requires one modem card per sector. Alternatively, one modem per two sectors can also be configured using a trunked configuration.2.1.3 Alarm/IOIt provides connectivity to the backhaul, remote GPS receiver and customer I/O.2.1.4 Medium Stability OscillatorThe MSO is an optional board that can be mounted on the front side of the backplanenear the floor of the BCU cabinet to provide up to 24 hours of holdover (free-run) in theevent of a GPS failure.2.1.5 Power SupplyThe BCU contains slots for three mains power supply units. Only two are required topower a fully populated site, the third can be optionally installed to allow for N+1redundancy.2.1.6 FansThe BCU is cooled by forced air via the air plenum and contains a fan tray containing asingle fan. The fan has a tachometer output that allows it to be alarmed approximatelyone week before it actually fails. Similar designs have achieved >90% success inalarming fans before failure.2.1.7 BackplaneThe backplane allows for interconnectivity of the site controllers, modems, and theAlarm/IO card. It also provides +27 VDC power to each of the cards.2.1.8 Surge ProtectorThe BCU has two surge elements. There’s a module that protects the mains power inputand there is a surge card that protects the backhaul, GPS, customer I/O, and power feedsto the RF heads.

DAP

2.2 Diversity RF Module

The Diversity RF module is completely self-contained and consists of two transmitter andtwo receiver lineups, two duplexer filters, two antenna elements, redundant fiber opticinterfaces and DC power conversion. The RF heads have a surge module that protects thepower feed from the BCU. Figure 3 shows the Integrated RF module.

Figure 4 below shows the different components of the DAP as described above. Pleasenote that filters shown with each TRX unit are for severe interference environments andare considered to be optional. Output power is 1 watt per antenna element. The integratedRF architecture eliminates the need for bulky RF cables to be run between the basescontrol unit and the RF heads. As shown only a power feed is needed from the base to the

top of the tower. Data is transmitted over fiber links.

2.3 DAP RedundancySite controller (1+1)• Modem cards (trucked modem configuration)o Two modem cards can be set up in a trunked configuration supporting twoRF heads each. This is illustrated in Figure 4 where a four sectorConfiguration is shown with two sets of modem cards connected to two RFHeads each.• Redundant backhaul Ethernet interfacesPreliminary DAP/CAP-C Product Description v1.3a 11Motorola Confidential ProprietaryPreliminary DAP/CAPC Product DescriptionDocument is subject to change• Optional Medium Stability Oscillator (MSO) to provide up to 24 hours ofOperation in case of GPS signals failure.• Power supply modules (N+1)