Achieving capacities over 1Gbps. Martins Dzelde Senior Sales Engineer

Transcription

1 Achieving capacities over 1Gbps Martins Dzelde Senior Sales Engineer

2 Agenda Spectrum Availability Ethernet data rate & link budget Mounting multiple radios to single antenna Case study: 1.7 Gbps links Ethernet aggregation types Future of E-band radios

3 FCC Available spectrum Licensed spectrum aggregate for achieving 1Gbps or more Upcoming E-bands radios with 2 GHz channel bandwidth latest technology Band Range, MHz Max bw per channel Lower 4GHz 3,700 to 4, MHz Lower 6GHz 5,925 to 6, MHz 11GHz 10,700 to 11, MHz 13GHz 12,700 to 13, MHz 18GHz 17,700 to 19, MHz 23GHz 21,200 to 23, MHz Other bands Unlicenced 24GHz 24,050 24,250 ~80MHz FDD Licenced 25Ghz 24,250 25, MHz blocks 28GHz 27,500 29,250 ~50MHz 38GHz 38,600 to 40, MHz blocks 80GHz GHz up to 5 GHz

4 Max data rate per channel By theory, increasing modulation above 512QAM gives less than 11% increase in Mbps, while taking 3-4 db penalty in link budget per each modulation

5 Theoretical over the air data rate FCC FCC channels:

6 Ethernet data rate SAF datasheet states Ethernet Layer 2 data rate available for transport of user traffic Use RFC 2544 testing methodology for comparing various systems Or, get creative:

7 TDD vs FDD architecture TDD based chipsets radios Switching TX and RX wastes time Even in FDD mode, TDD architecture alternates the transmission and reception of data over time hence increasing link latency and decreasing data throughput. ~2-3ms latency Inefficient packet processing Up to 150 K/s dramatically diminishes capacity when network traffic packets sizes are mixed e.g. voice + video will result in lower quality of service Spectrum mask? Wi-Fi chipsets may not comply with FCC designated spectrum masks Low Tx power Limits links to very short distance. Confusing with terminology aggregated Tx power for all Tx chains. FDD Carrier Class microwave radios Simultaneous Tx and Rx Low latency < 0.3 ms@64byte and 1518byte packets. (Latency based on RFC2544 test) Efficient packet processor Full rate using entire throughput at any packet size: high quality of service for voice, video and data traffic Compliant to radio standards Part 101, ETSI, spectrum masks, Tx power tolerance, emission class, and other related standard High power transmitters Ensures long distance links, smaller antennas, lower cost

8 Split-mount configuration ODU flex Connecting to single antenna Full Indoor configuration WG OBU IDU IF coax ODU: Outdoor Unit (BMA Tx and Rx separate) OBU: Outdoor Branching Unit IRFU: Indoor RF Unit (SMA Tx and Rx separate) IBU: Indoor Branching Unit IDU: Indoor Unit IBU #1 IBU #2 IRFU #1 IRFU #2 IRFU #3 IRFU #4 4x IDUs 9

9 Dual-pol antenna: V & H All-indoor 2+0 dual-pol vs single-pol dual pol Single-pol antenna: V or H single pol WG IBU IBU IRFU #1 IRFU #2 2x IDUs 10

10 Single antenna: split-mount Dual pol setup. Four Integra-S(-GS, - WS) FODUs mounted on stand-alone couplers and connected to dual pol antenna Single pol setup. Four CFIP ODUs mounted on OBU and connected to single pol antenna. Cascadable. Save up to 5-10 db on link budget!

11 Dual channel radios Two radios per modem All-outdoor or split-mount Wideband radios supporting 80MHz channels or more High modulations 1024QAM or 2048 QAM High Tx power for compensating increased modulations Built-in Layer 1 link bonding

12 Case study Cable & Wireless 7GHz and 8GHz band Each path with 6x 1+1 Space Diversity connecting islands with XPIC Distance ~40 miles over water, 6ft antennas 6x 128QAM = 6x ~287 Mbps = ~1,7 Gbps RF combined with outdoor branching unit for best link availability External aggregation: Layer 1 link bonding SAF radios & services: link planning, training, commissioning, support

13 Case study Experior Networks «The 8' antennas in the photo are using SAF CFIP Phoenix on a 42 mile link with space diversity. And there are two 4' and one 3' antenna with CFIP Lumina's. Amazing they work in this weather!!!!» - Chris Henshaw

14 Aggregation types Layer 1 - Link bonding; any device (router, switch, PC) can be connected. Traffic is sent over two links per-frame at the modem level Transparent to external Ethernet traffic In most cases it is not available in Layer 2 switches or Layer 3 routers Layer 2 - Link aggregation like LACP (Link Aggregation Control Protocol) or load balancing by VLANs. Works by distributing traffic amongst radio channels based on MAC addresses, IP addresses, ports Available with both Layer 2 and Layer 3 switches External 10 Gbps Ethernet switch Layer 3 - Load balancing - IP based. Advanced balancing configurations Available in routers and some Layer 3 switches

15 Aggregation options in SAF products Individual frequency pairs Integra-G 2+0 link bonding is ACM-aware d Product name Aggregation type Layer 1 Layer 2 Layer 3 Built-in External Built-in External Built-in External Integra (-S) and Integra-G (-GS) X X* - X - X Integra W and IntegraWS - X* - X - X CFIP Lumina 2 LAN ports - X* X X - X CFIP Lumina 1 LAN port - X* - X - X CFIP Phoenix M, XPIC X X* X X - X CFIP Phoenix C X X* - X - X CFIP Phoenix G2, XPIC X X* - X - X CFIP PhoeniX - X* X X - X CFIP Marathon - X* X X - X SAF Freemile 17/24 - X* - X - X SAF Freemile 5.8GE - X* - X - X

16 Future of E-band radios Bandwidth 2000 MHz channel High modulations, e.g. 128QAM Capacities 8 Gbps per radio and more ACMB Automatic Coding & Modulation & Baudrate Built-in 10 Gbps Ethernet switch Short distances or low availability Back-up frequency band for improving link availability

17 Thank you! SAF Tehnika 2017,