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WP2: Communications Links and Networking – update on progress

Mihael Mohorčič

Jozef Stefan Institute

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WP2 Objectives

To design and dimension user and backhaul user and backhaul communication links communication links based on the most suitable existing broadband communication standards broadband communication standards using adaptive modulation schemesadaptive modulation schemes, coding techniques coding techniques and diversity methods diversity methods as required in the selected frequency band (RF or optical) to overcome propagation impairments propagation impairments and provide applications with bit rates of up to 120Mbit/s to a user.

To develop efficient resource and mobility resource and mobility management management protocols for HAP environment.

To develop a network architecture network architecture supporting diverse quality of service requirements quality of service requirements and interworkinginterworking.

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WP2.1 Communication Standards

November 2003 – February 2005 (13/16)

To analyse candidate broadband communication analyse candidate broadband communication standards standards and select the most suitable for the select the most suitable for the implementation implementation in respective segments of the system taking into account identified scenarios.

M8 - Identification and overview of candidate broadband communication standards

done – see CAP-0047-WP21-JSI-CON-P01

M15 – Identification of critical aspects and technological constraints of candidate communication standards and selection of the most suitable candidate

work in progress

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WP2.2 Propagation aspects and diversity methods (i)

November 2003 – April 2005 (13/18)

To extend the work of HeliNet to array based array based technologies technologies and high speed mobile applicationshigh speed mobile applications

General objecive to be fulfilled at the conclusion of the sub-workpackage in M18 with the “Report on propagation aspects and methods for mitigating the effects of propagation impairments”

To evaluate propagation aspects evaluate propagation aspects in HAP scenariosM10 - Identification of topology and mobility effects on link margins and specification of RF link margins required to guarantee QoS

done – see CAP-0054-WP22-UOY-CON-P01

M11 – Optical link budget calculationdone

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WP2.2 Propagation aspects and diversity methods (ii)

To derive suitable propagation channel models derive suitable propagation channel models for broadband communications in the selected mm-wave frequency bands in the presence of significant Doppler effect, multipath and rain effects

M12 - Development of propagation channel simulator, to include fading, scintillation and Doppler

work in progress – missing parameters for different reference scenarios

To identify methods and techniques for mitigating the mitigating the effects of propagation impairments effects of propagation impairments on service delivery

M15 - Specification of fade mitigation techniques for HAPs at Ka band

work in progress

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WP2.2 Propagation aspects and diversity methods (iii)

Formulation of objectives of experimental investigation of the propagation channel propagation channel and processing the experimental data

M10 - Contribution to planning test sessions a wish-list of propagation measurements was generated

M15 - Comparison of channel model with measurements and model refinement

problem with gathering useful propagation data during trial sessions

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WP2.3 Radio interface & baseband signal processing (i)

May 2004 – April 2006 (7/24)

To propose the most suitable adaptive modulation adaptive modulation schemes and coding techniques schemes and coding techniques to be used with the selected communication standards in targeting fixed and mobile operating scenarios

M15 - Specification of adaptive modulation schemes and coding techniques

work in progress

M18 - Recommendations of necessary modifications/ adaptations of selected communication standards

work in progress in parallel with WP2.1

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WP2.3 Radio interface & baseband signal processing (ii)

To develop advanced signal processing algorithms advanced signal processing algorithms for HAP using software radio architecture

M18 - Determination of sig. processing techniques for MIMOwork in progress

To implement and assess the performance of selected signal processing algorithms on a DSP DSP platformplatform

M30 - Implementation of selected signal processing algorithms on a DSP board

work started on the implementation of Kalman filter for channel equalisation (currently using generic channel parameters)

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WP2.4 Resource management and spectrum sharing (i)

February 2004 – October 2006 (10/33)

To develop effective resource allocation strategies effective resource allocation strategies for the user and backhaul links, taking into account the specific requirements of single and multiple HAP architectures

M36–Determination of effective resource allocation strategiesgeneral objective to be fulfilled at the conclusion of the sub-WP

To investigate the issues associated with 28/31 GHz spectrum sharing spectrum sharing between HAPs, terrestrial and satellite systems

M15 – Spectrum sharing issues for BB from HAPs (D10)work in progress

M18 - Conclusive evidence on spectrum sharing issues

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WP2.4 Resource management and spectrum sharing (ii)

To explore the potential capacity, QoS and capacity, QoS and availability enhancements availability enhancements offered by (i) multiple platform configurations, (ii) advanced caching techniques, and (iii) user/application prioritisation

M12 - Selection of suitable broadband multimedia traffic models

Done – see CAP-0061-WP24-UOY-CON-01

M24 - Evaluation of the performance enhancements offered by multiple platform architectures

work in progress

M36 - Effectiveness of advanced caching and prioritisation techniques

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WP2.5 Networking & QoS aspects (i)

January 2005 – October 2006 (0/22)

To define a scalable and manageable network scalable and manageable network architecturearchitecture

To determine appropriate network and application network and application layer protocols for QoS and service provisioninglayer protocols for QoS and service provisioning

To determine and solve interoperability issues interoperability issues concerning the proposed protocol stack

To investigate routing issues related to the mobile routing issues related to the mobile environmentenvironment

To define an applicable network management network management architecture architecture based on existing standards

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WP2.5 Networking & QoS aspects (ii)

To evaluate the implications of all-optical backhaul implications of all-optical backhaul networknetwork

Additional objective defined after Virtual Technical Meeting in July 2004 - Contribution to eventual Contribution to eventual mobile train network architecture mobile train network architecture

part of overall objective concerned with an outline system design of broadband service delivery from HAPs to high-speed vehicle users

Done – see CAP-0214-WP25-BT-CON-P02 “Broadband WLAN to moving vehicles”