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symmetry WiMAX provides broadband wireless access for a variety of fixed and portable applications. The WiMAX Sub Band Controller (WSBC) switches IP packets between the core network and the symmetry WiMAX airlink ensuring that traffic reaches its destination while meeting its QoS parameters.
The WSBC supports all the mandatory WiMAX features. In addition, it also supports the optional WiMAX features (such as Space-Time Coding, Sub-channelling, and ARQ) that allow symmetry to deliver the best-in-class spectral efficiency and the longest NLOS range available in the industry.
The WSBC high-speed packet processing capabilities and state-of-the-art wireless scheduling algorithms eliminate capacity bottle-necks. As a software definable radio, it supports both 802.16-2004 and 802.16e; thus ensuring that in the future, operators can upgrade their networks quickly.
Software Upgradeable RadioHigh-speed ProcessingEliminates Capacity Bottlenecks
EthernetDebug Port
To VLAN Switch(core network)
From NetworkSynchronization Clock
ToRadio
Flash
DDRAMDOR133150 MHz
IntelIXP2350Network
Processor
PCI toClusterBus
Bridge
100BaseT PHY100BaseT PHY
1 PPSSignal
40 MHzClock
Link Portto TIC
interface
FEC FPGA
Analog Devices
ADSP-TS201 Processor
TimingGeneration
Figure 1WiMAX PHY Piggyback
ABS4000 WiMAXSBC Module
ABS4000 WiMAX SBC MODULE
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For more information:8150 Trans-Canada Hwy.Montreal, QC H4S 1M5CANADA Tel.: +1 514 335 1210 [email protected]
WiMAX SBC MODULE (802.16-2004) SPECIFICATIONSTechnical Characteristics
WiMAX PHY LayerImplemented by the Analog Devices TigerSHARC ADSP-TS201 Processor,the WiMAX SBC modules physical layer:
Provides FDD profiles for 1.75, 3.5 & 7 MHz channel bandwidth. Meets all the mandatory requirements of 802.16-2004. Meets optional WiMAX requirements, including:
Diversity for improved performance under NLOS conditions
Sub-channeling for extended system reach.
GENERAL FEATURES
Physical port RJ-45 100Base-T
Network interface protocol IEEE 802.3
Network segmentation VLAN IEEE 802.1Q/802.1D (802.1p)
Packet switching Low latency Layer-2 switching and policy switching that enables easy inter-working with Routers, Gateways, Firewall/NAT,
IP PBX, Media Gateway, and Demilitarised Zone (DMZ) Host.
Packet filtering Broadcast/Multicast Flood Control
User traffic protocol IPv4, PPPoE, L2TP, PPtP, IPSec, MPLS
Grade of Service (GoS) symmetry NMS includes pre-defined profiles GoS profiles for typical services, such
as residential and business VoIP. All profile settings are configurable, including packet classification rules and criteria, traffic rates, VLAN ID, user priority, and maximum over-subscription ratios.
BS WiMAX IP Dynamic (using DHCP) or staticconfiguration Software maintenance Over-the-air, software upgrade to SS.
Automatic upgrade on power-up.
BS/SS configuration & symmetry NMS, SNMP v2/v3,management protocols Telnet, DHCP & TFTP
MIBs Standard Enhanced for optional features
Test / protocol WiMAX-certified test equipmentanalyser support
PHY LAYER FEATURES
Maximum throughput 6.5 Mbps for 1.75 MHz (at 64 QAM 3/4)(peak sector capacity) 13 Mbps for 3.5 MHz (at 64 QAM 3/4)
Radio access methods FDD, OFDMWiMAX profiles 1.75, 3.5 & 7 MHz in 3.5 GHz bandCyclic prefix support 1/4, 1/8,1/16, and 1/32Diversity Space Time Coding (STC) Maximal Ratio Combining (MRC)
Sub-channelling 2, 4, 8, and 16 channelsForward error correction (FEC) Reed-Solomon, Convolutional Coding
WiMAX MAC LayerImplemented by the Intel IXP2350 Network Processor, the WiMAXSBC modules MAC layer:
Supports mandatory WiMAX MAC features, plus ARQ for improvedchannel efficiency and data throughput.
Has a state-of-the-art wireless scheduling algorithm to ensure thatQoS commitments are met.
MAC LAYER FEATURES
Packet classification Layer 2: IEEE 802.3, IEEE 802.1Q (802.16 compliant and VLAN ID, IEEE 802.1D (802.1p)SR Telecom enhanced) Layer 3: IP, Differentiated Services Code
Point / TOS Layer 4: Port number and/or range
Bandwidth optimisation Payload header suppression
QoS flow support Policy enforcement for each service flow Multiple-service class support for each SS
Traffic conditioning & Traffic priority markingscheduling Per service-flow, class-based queuing
Traffic conformance metering Traffic shaping Congestion control (WRED) 802.16 link scheduling
(UGS, rtPS, nrtPS, BE) Latency and jitter control Automatic Retransmission reQuest (ARQ)
Framing Fragmentation & Defragmentation Packing & Unpacking Encryption & Decryption
Airlink control Network entry and initialisation& maintenance Initial and periodic ranging
SS Configuration Automatic power control Bandwidth allocation Queue management
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