Network Service Provisioning in UWB Open Mobile Access Networks - PowerPoint PPT Presentation

About This Presentation
Title:

Network Service Provisioning in UWB Open Mobile Access Networks

Description:

Open Mobile Access Network (OMAN) paradigm. Efficient information transport ... OMAN Concepts. Administratively independent IP domains ... – PowerPoint PPT presentation

Number of Views:109
Avg rating:3.0/5.0
Slides: 26
Provided by: engAu
Category:

less

Transcript and Presenter's Notes

Title: Network Service Provisioning in UWB Open Mobile Access Networks


1
Network Service Provisioning in UWBOpen Mobile
Access Networks
  • Dario Di Sorte, Student Member, IEEE, Mauro
    Femminella, Student Member, IEEE,Gianluca Reali,
    Associate Member, IEEE, and Sven Zeisberg,
    Member, IEEE

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS,
VOL. 20, NO. 9, DECEMBER 2002
Pages 1745-1753
2
Outline
  • WHYLESS.COM
  • Open Mobile Access Network (OMAN)
  • Requirements for PHY
  • UWB as PHY
  • UWB Domain Parameters
  • Current work

3
WHYLESS.COM
  • Cofunded by European Union
  • Current paradigmatic chain
  • Infrastructure Service Terminal (user)
  • Rigid prevent a quick response to changing user
    needs and business models
  • Open Mobile Access Network (OMAN) paradigm
  • Efficient information transport
  • Modern, small scale, electronic business,
    evolutionary growth
  • Decouples user, info transport resources, content
    provision service
  • Goal standardize a new commodity dealing with
    the transportation of electronic information

4
OMAN Concepts
  • Administratively independent IP domains
  • external characterization of traffic in terms of
    QoS parameters
  • Virtual delay (d)
  • Network commodity
  • Standard measure of the level of the service
  • Differentiated Services (DiffServ) compliant
    approach to guarantee QoS (RFC 2475)
  • Usage-based pricing
  • Actually used and/or reserved network resources
  • QoS charge beyond the flat access charge

5
OMAN Network Model
6
Entities involved
  • End Users
  • Consumers needing service
  • Network Service Providers (NSPs)
  • Provide the network infrastructure
  • Network Resource Manager (NRM)
  • Manage the domains owned by the NSP
  • Guarantee a set of edge-to-edge services over
    domain
  • Application Service Providers (ASPs)
  • Application service and IP connectivity to End
    User
  • Information Brokers (IBs)
  • End User and ASP mediator
  • Identifies ASPs and provides ASPs history
  • Resource Brokers (RBs)
  • ASP and NSP mediators

7
OMAN Reference Environment
8
End to End Service Provisioning Procedure
  • End user (through IB)
  • Identifies an ASP for a specific service
  • Requests service (quality of desired service and
    willingness to pay)

9
End to End Service Provisioning Procedure
  • ASP
  • Transforms customers qualitative
    requirements into quantitative technical
    parameters
  • Requests RB to find the best path to
    deliver the application service (eBDL)

10
End to End Service Provisioning Procedure
  • RB
  • Identifies the potential domains and checks
    their offers with e-Table
  • Runs an interdomain routing algorithm

11
e-Table
  • f(d) Technical cost of information transfer in
    commodity unit
  • f(8) 0
  • a Cost of each commodity unit
  • Network parameters, end points, domain policies
  • ? Price variation factor
  • Market fluctuations
  • Bres,i xiPs (0

12
End to End Service Provisioning Procedure
  • RB - ASP
  • Path found
  • Teriffs charged

13
End to End Service Provisioning Procedure
  • ASP - End user Relevant price
  • End user - ASP Accept/Reject
  • ASP - Each NAP involved Service contract

14
Temporal sequence of interactions
15
PHY Requirements
  • Advanced and scalable radio transmission
    technology
  • Heterogeneous traffic with specific QoS
  • PHY should not be a bottleneck
  • Short-term trading of wireless and wired
    information transport resources
  • Wireless Ownership not clear
  • On demand spectral usage shared with others
  • Synchronization probs (TDMA)
  • Combine resources with single radio front end
    (FDMA)

16
PHY Layer for OMAN
  • PHY layer requirements
  • Single PHY channel has to support a wide range of
    net data rates
  • Re-configurable on-the-fly, to maintain QoS
  • Support continuous and packet-oriented channels

  • Mobility of terminals has to be considered.
  • PHY layer functionality
  • Coding according to the appropriate FEC scheme
  • Pulse modulation by the appropriate mapping of
    the encoded bits onto symbols
  • Insert/remove pilot symbols/preamble to/from the
    symbol train
  • Perform radio transmission and reception
    including synchronization

17
UWB Characteristics
  • Large data rates over short distances without
    allocating dedicated spectral resources
  • Software controllable parameters
  • Adapt bit rate according to terminal location,
    propagation condition and service requirements
  • Enables highly resilient, scalable and flexible
    networks
  • Other features
  • Low mean transmission power
  • Through the wall penetration
  • Precision location
  • Minimized hardware complexity

18
UWB for OMAN
  • Unsynchronized UWB
  • Fulfills wide range of requirements
  • End user service contracts
  • Dynamic domain requirements from NRM
  • Broad range of data rates
  • Classes of services
  • No sophisticated cell planning
  • Same frequency
  • On the fly modification of transmission
    parameters
  • Processing gain, TH sequence, duty cycle,
    temporal pulse shape, code rate

19
IR-UWB
  • Spread Spectrum technology with BW in GHz
  • Impulse Radio
  • Best studied
  • Relatively simple implementation
  • Large crest factor but with low average power
  • Whole band to every service provider
  • Improved spectral efficiency
  • Wider range of rates possible
  • Same equipments for all providers
  • Disadvantages
  • Synchronization not possible
  • Power monitoring for billing
  • Less affected by fading

20
UWB Number of Users
Number of users versus power increase of each
user for different target bit error rates for unc
oded transmission and 384 Kb/s single user data
rate.
21
PHY design considerations
  • IR with FCC regulations
  • Centralized wireless network
  • Up- and down-link have the same air interface
    definition
  • Only continuous pulse transmission with hard
    handovers are currently considered

22
UWB Domain Per Domain Behavior
  • NRM functions
  • Admission control able to support mobility
  • Provide bandwidth estimation

LMG Local Mobility Gateway
23
UWB Domain Admission Control Function
  • GuageGate Reservation with Independent Probing
    (GRIP)
  • Verifies RB claims before NRM stipulates
    contract
  • Handoffs

24
UWB Domain Bandwidth Estimation
  • Discovery probe packets
  • Tradeoff Overhead v/s Information accuracy
  • Per Domain Behavior (PDB) table

25
UWB Transmitter
  • Design parameters
  • Cannot be changed once the project is finalized
  • w(t), Tm, Tc, Na, cn,k, dn,k, Np, B
  • Control parameters
  • Can be varied by MAC
  • Em, Ns, Nh, Nd
  • Derived parameters
  • Values dependent on Control parameters
  • Tf, Ps, Nc, Ts, M, K, Rs, Rb, Es, Eb

26
Current Work
  • Performance degradation of UWB systems can be
    analytically predicted
  • UWB DS-IR more robust against existing radio
    technologies
  • Controlled licensed mode for higher transmission
    power
  • Spectral shaping to avoid interference
  • TH codes investigated
  • Spectrogram based technique threshold detector
  • Turbo encoding was found to improve performance

27
References
  • www.whyless.org
  • Deliverable D5_2b, Transceiver architecture and
    algorithms, Jan 2003
  • Deliverable D5_3b, Physical layer architecture
    and performance, Jan 2003
  • Deliverable D5_4b, Ultra-Broadband coexistence
    (final), Dec 2003
Write a Comment
User Comments (0)
About PowerShow.com