1. 1 WP2: Communication Links and Networking Mihael Mohorčič Torino, December 2003

2. 2 WP2 Scope Communication links between HAP as a central point in the network and: ground nodes (UDL and BL) other HAPs (IPL) and satellites (PSL)

3. 3 WP2 Objectives user and backhaul communication links communication standards modulation schemescoding techniques diversity methods propagation impairments up to 120Mbit/s To design and dimension user and backhaul communication links based on the most suitable existing broadband communication standards using adaptive modulation schemes, coding techniques and diversity methods as required in the selected frequency band (RF or optical) to overcome propagation impairments and provide applications with bit rates of up to 120Mbit/s to a user. resource and mobility management To develop efficient resource and mobility management protocols for HAP environment. network architecture quality of service To develop a network architecture supporting diverse quality of service requirements and interworking.

4. 4 WP2 Structure (i) WP2.1 Communication standards Select and analyze most suitable existing broadband communication standards (IEEE 802 family, DVB family, HIPERACCESS,...) Identify critical aspects and technological constraints JSI JSI, POLITO, EUCON, UPC 23.5 PM – Nov.03-Feb.05 WP2.2 Propagation aspects and diversity methods Evaluate the impact of propagation impairments at mm-wavelengths in CAPANINA operating scenarios Derive suitable mm-wave propagation channel models Identify methods for mitigating the effects of propagation impairments UoY/DoE UoY/DoE, POLITO, EUCON, UPC, DLR, SKYLINC 44.5 PM – Nov.03-Apr.05

5. 5 WP2 Structure (ii) WP2.3 Radio interface & baseband signal processing Propose required modifications to radio interface of the selected access standard(s) in particularly for the HAP-to-train mobile scenario Investigate advanced software radio signal processing techniques POLITO POLITO, JSI, EUCON, UPC 49 PM – May04-Apr.06 WP2.4 Resource management and spectrum sharing Develop efficient strategies for resource allocation and mobility management while providing the necessary QoS in single- and multi- platform architectures (platform movement, user mobility) Investigate spectrum sharing with other wireless/satellite systems operating in the same band (ITU spectrum allocation) UoY/DoE UoY/DoE, CRL 44 PM – Feb.04-Oct.06

6. 6 WP2 Structure (iii) WP2.5 Networking & QoS aspects Define a suitable network architecture and determine network and application layer protocols to support required QoS Examine networking aspects in all-optical backhaul network BUTE BUTE, JSI, BT, DLR 49 PM – Jan.05-Oct.06

7. 7 WP2 Time Plan

8. 8 Work Effort

9. 9 WP2 Inputs (i) Inputs required: From WP1 From WP1: business models, operating scenarios, candidate applications and services Within WP2 Within WP2: sub-WPs interlinked with flow of information from WP2.1 towards WP2.5 From WP4 From WP4: experimental data collected by measurements during the trial missions (e.g. propagation trial data, mobility data): to build and validate the mm-wave propagation channel model to support the development of resource and mobility management strategies to validate system and network concepts developed in WP2

10. 10 WP2 Inputs (ii) Previous work mainly performed in tasks T1-T4 of the HeliNet project: System level design aspects for the delivery of broadband services over HeliNet (HE-032-T1-UNY-RP-01) Propagation considerations and diversity methods required to offer broadband services over HeliNet (HE-033-T2-UNY-RP-01) Investigation of suitable modulation and coding schemes for HeliNet broadband services (HE-065-T3-UNY-RP-01) Resource allocation methods and network protocols for HeliNet (HE-064-T4-UNY-RP-01) Outline system specification for the broadband application (HE-079-WP5-UNI-SP-01)

11. 11 Outcomes important for WP1 to develop the business model and design a suitable system architecture Identification of candidate communication standards (M8), their critical aspects and technological constraints (M15) Spectrum sharing and interoperability issues (M18) Evaluation of the performance enhancement by multiple platform architectures (M24)

12. 12 Outcomes important for WP3 to develop communications equipment for trials: Identification of candidate communication standards (M8), their critical aspects and technological constraints (M15) Implementation of signal processing algorithms on a DSP board (M30) to support mm-wave antenna development Link budgets (M11) and fade mitigation techniques (M15) Specification of radio interface with suitable adaptive modulation schemes and coding techniques (M18)

13. 13 Outcomes important for WP4 to implement the testbed and carry out the trial campaign: Requirements for the test session for investigation of mm- wave fixed and mobile propagation channel (M10) Definition of network architecture (M20) and specification of protocol stack supporting QoS (M29)

14. 14 Document Properties