Notes - MIECT
Comunicações Móveis
Notes - MIECT
Comunicações Móveis
  • Comunicações Móveis
  • The Communication Network
    • The Phone Network
    • The Internet
    • The Mobile Network
  • Wireless Systems
    • Wireless Systems
    • Mobile Hassles
    • Device Issues
    • Why is mobile hard?
  • Physical Layer
    • Classifications of Transmission Media
    • Wireless
    • Radio Transmission Impairments
    • Time-Domain View
    • Propagation Degrades
    • Propagation Mechanisms
    • Redundancy
  • Satellite Networks
    • Satellites
    • Satellite Networks
      • GEO - Geostationary Orbit
      • NGSO - Non Geostationary Orbits
    • Routing
  • Mobile Networks
    • Connections and structures
    • Cell
    • Wireless networks
    • 802.11
    • Infrastructure vs Ad Hoc Mode
    • Data Flow Examples
    • Physical layer
    • MAC
      • Multi-bit Rate
      • MAC Layer
      • Carrier Sense Multiple Access
      • Some More MAC Features
    • How does a station connect to an Access Point?
      • IEEE 802.11 Mobility
    • How to extend range in Wi- Fi?
      • IEEE 1905.1 standard, Convergent Digital Home Network for Heterogeneous Technologies
  • Bluetooth, Wireless Sensor Networks, ZigBee
    • Bluetooth
      • Piconets
        • Device Discovery Illustrated
        • Paging
      • Scatternet
      • Bluetooth Stack
        • Baseband in Bluetooth
        • Adaptation protocols
      • Profiles and security
        • Bluetooth
        • Link keys in a piconet
      • 802.15.x
        • Bluetooth Networking Encapsulation Protocol
        • Bluetooth 4.0: Low Energy
          • Device Modes
          • Link Layer Connection
          • How low can the energy get?
          • BLE and GAP
    • Wireless Sensor Networks
      • MIoT and HIoT are different
      • Types of Wireless Networks
      • Wireless Sensor Network
      • 802.15.4 and Zigbee
      • 802.15.4 / ZigBee Architecture
        • IEEE 802.15.4 MAC
        • Channel Access Mechanism
        • Association procedures
        • ZigBee
        • ZigBee and BLE
  • Cellular Networks
    • Wireless cellular network
    • Wide Area Wireless Sensor Networks (WWSN)
      • LTE-M
      • NB-IoT
      • Spectrum & Access
      • Cellular technologies
      • LoRa
      • The Things Network
    • Technological waves
    • 1G - Mobile voice
    • 2G - Global System for Mobile Communications (GSM)
    • 2.5G - General Packet Radio Service (GPRS)
    • 3G - Universal Mobile Telecommunication System
      • Multiplexing mechanisms
      • SIP Protocol
      • Services in IMS
    • 4G - Long Term Evolution/Evolved Packet Core (LTE/EPC)
      • Long Term Evolution (LTE)
    • 5G
      • Example of verticals
      • 3GPP Releases detail
      • Technologies
      • New Radio is required
      • System architecture
      • Non-stand Alone (NSA)
      • Networks deployment
      • Protocol stacks
      • Procedures
      • QoS Model
      • Mobility in 5G
      • Distributed cloud: Edge Computing and 5G
      • Slicing
    • 6G
  • Software and Virtualization Technologies in Mobile Communication Networks
    • Network Function Virtualization
    • Management and Orchestration
    • Software Defined Networking
      • How to “direct” the controller?
      • Emulation
      • Programming Protocol-Independent Packet Processors (P4)
    • OpenRAN
    • Multi-access Edge Computing
    • Network Automation
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On this page
  • One solution: inter satellite links (ISL)
  • Problems
  • Reference model for satellite access
  • Protocol architecture
  • IP interworking
  • Communication Satellites
  • Satellite Signals
  1. Satellite Networks

Routing

PreviousNGSO - Non Geostationary OrbitsNextConnections and structures

Last updated 2 years ago

One solution: inter satellite links (ISL)

  • Reduced number of gateways needed.

  • Forward connections or data packets within the satellite network as long as possible.

  • Only one uplink and one downlink per direction needed for the connection of two mobile phones.

Problems

  • More complex focusing of antennas between satellites.

  • High system complexity due to moving routers.

  • Higher fuel consumption.

  • Thus shorter lifetime.

Iridium and Teledesic planned with ISL.

Other systems use gateways and additionally terrestrial networks.

Reference model for satellite access

Protocol architecture

IP interworking

Communication Satellites

A Communication Satellite can be looked upon as a large microwave repeater.

It contains several transponders which listens to some portion of spectrum, amplifies the incoming signal and broadcasts it in another frequency to avoid interference with incoming signals.

Satellite Signals

Used to transmit signals and data over long distances.

  • Weather forecasting.

  • Television broadcasting.

  • Internet communication.

  • Global Positioning Systems.