5_annex 6 4 - Skyedge Ii Technical Description V5 | Very Small Aperture Terminal | Network Topology

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    17/04/2011  Annex 7.2 - SkyEdge II Technical Description   This document contains information proprietary to Gilat Satellite Networks Ltd. and may not be reproduced in whole or in part without the express written consent of Gilat Satellite Networks Ltd. The disclosure by Gilat Satellite Networks Ltd. of information contained herein does not constitute any license or authorization to use or disclose the information, ideas or concepts presented. The contents of this document are subject to change without prior notice Gilat Network Systems 17/04/2011   [] II Technical Description v5, April 2011   i   Proprietary and Confidential Table of Contents 1.   Introduction  ................................................................................................................................................... 5    1.1   The SkyEdge II System  ........................................................................................................................... 5    1.2   Benefits for the SkyEdge II Operator   .................................................................................................... 5    2.   SkyEdge II System Overview   ......................................................................................................................... 8    3.   SkyEdge II Hub  ............................................................................................................................................. 11   3.1   Hub Overview   ....................................................................................................................................... 11   3.2   Hub components  .................................................................................................................................. 11   3.3   Optional Hub components  .................................................................................................................. 14   3.4   Hub Configurations  .............................................................................................................................. 15    4.   SkyEdge II VSATs  .......................................................................................................................................... 17    4.1   SkyEdge II IP  ......................................................................................................................................... 17    4.2   SkyEdge II Extend   ................................................................................................................................. 17    4.3   SkyEdge II Access  ................................................................................................................................. 17    4.4   SkyEdge II Pro  ....................................................................................................................................... 18    4.5   Expansion Cards  ................................................................................................................................... 18    4.6   Local configuration and management   ............................................................................................... 19   4.7    Outdoor Equipment   ............................................................................................................................. 20    5.   NetEdge  ........................................................................................................................................................ 21   5.1   Using NetEdge for Multi-Star Private Networks  ................................................................................ 21   5.2   NetEdge Technology   ............................................................................................................................ 23   6.   Network Management System (NMS) ....................................................................................................... 24   6.1   SkyMon .  ..................................................................................................................... 25    6.2   VSAT Auto Pointing System (VAPS) ..................................................................................................... 28    7.   DVB-S2 ACM Outbound   ............................................................................................................................... 30    7.1   DVB-S2 Background   ............................................................................................................................. 30    7.2   DVB-S2 Spectral efficiency   .................................................................................................................. 30    7.3   CCM and ACM  ...................................................................................................................................... 31   7.4   SkyEdge II DVB-S2 Specifications  ........................................................................................................ 32    7.5   SkyEdge II ACM implementation ......................................................................................................... 33   7.6   SkyEdge II DVB-S2 Enhancements  ...................................................................................................... 33   8.   DVB-RCS based Inbound   ............................................................................................................................. 37    8.1   DVB-RCS background   ........................................................................................................................... 37    8.2   SkyEdge II DVB-RCS Access Scheme  .................................................................................................... 38    8.3   SkyEdge II Physical Layer implementation  ......................................................................................... 42      [] II Technical Description v5, April 2011   ii   Proprietary and Confidential 9.   SkyEdge II Technology   ................................................................................................................................ 49   9.1   TCP Acceleration  .................................................................................................................................. 49   9.2   HTTP acceleration  ................................................................................................................................ 51   9.3   IP protocol Support   .............................................................................................................................. 54   9.4   QoS capabilities  ................................................................................................................................... 57    9.5   IP Telephony in SkyEdge II  ................................................................................................................... 60    9.6   Mesh Connectivity (SkyEdge II Access and Pro)  ................................................................................. 61   9.7    Network Bonding  ................................................................................................................................. 64   10.   Specialized VSAT Applications  ................................................................................................................... 66    10.1   SkyAbis Cellular backhaul   .................................................................................................................... 66    10.2   Multiple applications in a shared network   ........................................................................................ 67    11.    Acronyms  ...................................................................................................................................................... 68    11.1   SkyEdge II Acronyms  ............................................................................................................................ 68    11.2   General Acronyms  ................................................................................................................................ 68    Table of Figures Figure 1: SkyEdge II Mesh and Star Topology  .............................................................................................. 9   Figure 2 - NetEdge Topology  ......................................................................................................................... 9   Figure 3: Traffic flow through the hub components  ................................................................................. 11   Figure 4: SkyEdge II Hub - Rack Layout  ....................................................................................................... 12   Figure 5: IPM rear panel  .............................................................................................................................. 13   Figure 6: SkyEdge II Access and Pro  –  Expansion Slots .............................................................................. 18   Figure 7: Outdoor Unit Components  ......................................................................................................... 20   Figure 8 General topology of a multi-star corporate network  ................................................................. 21   Figure 9 - Multi-star high-level topology with Mesh VSATs (MV) and NetEdge GWs  ............................. 22   Figure 10: NMS Main Screen  ....................................................................................................................... 24   Figure 11: SkyMon Dashboard  .................................................................................................................... 26   Figure 12: Fault Management View  ............................................................................................................ 27   Figure 13: Sample report - Outbound Symbol Rate per ModCod  ............................................................ 28   Figure 14: SkyManage VAPS interface  ........................................................................................................ 29   Figure 15: DVB-S2 Modulation schemes  .................................................................................................... 30   Figure 16: Spectral efficiency of DVB-S2  .................................................................................................... 31   Figure 17: CCM example  .............................................................................................................................. 31   Figure 18: ACM Example .............................................................................................................................. 32   Figure 19: SkyEdge II ACM implementation  ............................................................................................... 33   Figure 20: SkyEdge II efficient packing of MPEG frames  ........................................................................... 35   Figure 21: SkyEdge II Real time scheduling  ................................................................................................ 35   Figure 22: SkyEdge II greater efficiency scheduling  .................................................................................. 36   Figure 23: Time Frequency Plan with different bursts  .............................................................................. 38   Figure 24: Frames and Superframes  ........................................................................................................... 39   Figure 25: TRF Burst  ..................................................................................................................................... 39     [] II Technical Description v5, April 2011   iii   Proprietary and Confidential Figure 26: ATM cell makeup  ........................................................................................................................ 40   Figure 27: CSC Burst  ..................................................................................................................................... 42   Figure 28: Logon and initial sync  ................................................................................................................ 42   Figure 29: SkyEdge II Inbound ModCods  .................................................................................................... 43   Figure 30: Example  –  Time Frequency Plan  ............................................................................................... 44   Figure 31: ICM-1D change to lower symbol rate  ....................................................................................... 45   Figure 32: ICM-2D change to lower ModCod  ............................................................................................. 46   Figure 33: ICM-3D  –  AUPC  ........................................................................................................................... 46   Figure 34: ICM-4D  –  Dynamic Channels  ..................................................................................................... 47   Figure 35: Frequency hopping options  ....................................................................................................... 48   Figure 36: TCP traffic without acceleration  ............................................................................................... 50   Figure 37: TCP traffic with acceleration  ..................................................................................................... 51   Figure 38: HTTP traffic without pre-fetching  ............................................................................................. 51   Figure 39: HTTP traffic with pre-fetching  ................................................................................................... 52   Figure 40: Use of a persistent TCP link  ....................................................................................................... 53   Figure 41: VRRP  ............................................................................................................................................ 56   Figure 42: SkyEdge II Multi-VLAN, VRF support  ......................................................................................... 57   Figure 43: Managed Private Networks  ....................................................................................................... 59   Figure 44: VoIP Topology  ............................................................................................................................. 60   Figure 45: Cellular backhaul  ........................................................................................................................ 66   Figure 46: Shared hub  .................................................................................................................................. 67