Wireless Standards adaptation

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Wireless Standards adaptation
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Targets of the approach

• Analyze the Wireless Standards
• (eventually participate in and influence the
  standardization)

• Apply the simplest modifications for optimized
  operations in sensitive and dedicated
  applications
• At a minimal cost
• With a reasonable delay
• Without changing the base of the Standard

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S-WiFi
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S-WiFi features

• Civilian standards
• 802.11b/g

• In dedicated frequency bands
• 2 6 GHz

30dBm and directional antennas gt Improved range
gt 2 km _at_ 11 Mbps (in free space conditions)

• Modes
• AP, repeater
• Bridge
• Ad hoc

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S-WiFi Ad hoc mode and dynamic routing

• Network characteristics
• Ad hoc architecture (no infrastructure required)
• Nodes can be mobile
• Relaying for coverage extension
• Dynamic routing using OLSR switch software
• Pro-active protocol with routing table
  maintained permanently
• OLSR switch UNIK version used for demo

• Performances with 802.11b mode (11Mbps radio data
  rate)
• Up to 4 Mb/s radio (end-to-end) in urban area,
  with one relay (2 hops)

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Comments on S-WiFi

• Based on a WiFi core
• From a limited number of chipset manufaturers
• Very mature
• With a stack completely defined and deeply
  embedded
• So, modifications at the lower layers are limited
• These modifications are mainly possible
• at the IP layer 3 for introduction of dynamic
  routing algorithms (MANET)
• and externally with a frequency conversion and
  additional power amplification.

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S-WiMAX
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IEEE 802.16d Standard

• Version 802.16-2004
• Main characteristics
• Frequency band lt11GHz
• Bandwidth 1.75, 3.5, 7, 10 or 20MHz
• Single Carrier, OFDM 256 or OFDMA 2048
• Modulation BPSK, QPSK, QAM16 or QAM 64
• Radio data rate up to 70Mbps
• RF power 30dBm typical (depending on the
  license)
• Range PHY protection up to 30km
• Topologies
• centralized (PMP and Centralized MESH) or
  distributed (Distributed MESH)
• MAC protocol TDM/TDMA (frames from 2.5 to 20ms)
  -gt QoS
• TDD or FDD
• Security Traffic Encryption Key of 64bits

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Standard IEEE 802.16e

• 802.16d evolution for mobility support
• Main characteristics
• Frequency band lt6GHz
• Maximum speed 120km/h
• Bandwidth 1.75, 3.5, 7, 10MHz
• OFDM 256 or OFDMA 2048
• Modulation BPSK, QPSK, QAM16 ou QAM 64
• Topology only in PMP right now
• MAC protocol TDM/TDMA (frame from 2.5 to 20ms)
• Duplex in TDD or FDD
• Handover
• New Study group (802.16j) for introduction of RS
  (Relay Station) between BS (Base Station) and SS
  (Subscriber Station) the goal is to avoid too
  many BS in deployments. RS could be fixed,
  nomadic or mobile.

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S-WiMAX potential applications
Secure Hot Spots for Police HQ, Fire-station,
PMP secure networks for airport, railway station,
harbour, city, )

• Frequency band between 2 and 6 GHz
• Frequency Hopping
• Range 5 km
• Triple Play
• Aggregate throughput 20 Mb/s

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S-WiMAX platform

• Civilian standards
• IEEE 802.16d

Radio board

• Topology
• PMP (Point to MultiPoint)

Modem board -gt MAC Real Time
Low-latency TDMA-based links

• BW 1.75, 3.5, 7 and 10MHz
• Modulation OFDM-256
• (BPSK, QPSK, QAM16, QAM64)
• RF 5.15 5.85GHz

Processor board -gt Scheduler
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S-WiMAX added-value functions

• Frequency Hopping
• Overall BW up to 300MHz
• 400 hops/s

• MESH centralized
• Not available in COTS
• Relaying at level 2 of the protocol stack

• MESH distributed
• Cross-layer dynamic routing (layers 3 2)

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Possible levels of modifications
General Purpose Processor Half Size PCI Card
OFDM Digital Half Size PCI Card
RF Analog Half Size PCI Card
Antenna
C O N N E C T E U R
C O N N E C T E U R
PCI C O N N E C T E U R
PCI C O N N E C T E U R
ASIC (PHY)
Power
FPGA (LMAC)
GPP (UMAC)
RF
Ethernet
RS-232

• RF level
• Tailored radio

• Upper MAC level
• IP layer Interface
• Scheduler
• Waveform parameterization
• Lower MAC interface

• Lower MAC level
• PHY layer Control
• Signaling management
• RF chain control
• Upper MAC interface

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S-WiMAX approach

• Either based on WiMAX systems (BS and CPE)
• Limited modifications due to the priority of
  mass-market road-map
• Or based on WiMAX chipset
• From one of the many chipset manufacturers
• A few deployments right now
• Availability of various open evaluation kits
• So, modifications are not limited even in the
  lower layers (MAC level).
• The potential modifications are tested on an
  existing test-bed

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S-WiMAX recommendation

• Discuss the opportunity to push for a
  standardisation activity within IEE to cover a
  new 802.16 additional standard to address the
  aviation airport needs
• Taking the opportunity of the relative open door
  to make the necessary standard evolution
• The potential interest of many manufacturers for
  this potential market
• Take the opportunity to use already existing
  test-bed to validate the new potential features
  and ensure that the evolutions are well validated