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Johnny Dixon  BT Group Technology

“Short range, high data rate, nomadic equipment operating in the frequency range 5.150 to 5.875 GHz” - BT’s Response to the Consultation Document. Johnny Dixon  BT Group Technology. Overview. BT believe that there is a need for both public & private RLAN systems in the 5 GHz bands

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Johnny Dixon  BT Group Technology

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  1. “Short range, high data rate, nomadic equipment operating in the frequency range 5.150 to 5.875 GHz”- BT’s Response to the Consultation Document Johnny Dixon BT Group Technology

  2. Overview • BT believe that there is a need for both public & private RLAN systems in the 5 GHz bands • BT believe that the bands should be used primarily by HIPERLAN 2 & IEEE802.11a • How should the spectrum be best used to support all applications and technologies?

  3. Public Access Systems • BT believe that there is a demand for low power public access systems in these bands • This would allow public access to a data network using the HIPERLAN interface • This would be a pico-cellular network in major urban centres, and other locations where there are high public densities

  4. Private in-home systems • BT believe there will be demand for two types of private wireless home network to extend or replace wired networks • The Home Local Network (based on IEEE 1394) for interconnection of digital TV STBs with other devices in the home • The Home Access Network will interconnect with broadband interactive services delivered using ADSL, cable, MVDS etc

  5. Private business systems • BT believe that there will be a large demand for private RLANs for businesses • These will typically be operated in: • offices • industrial sites • large business sites • … and will give employees nomadic / cordless access within the business premises

  6. The RA’s Proposals BT’s response to the “Strawman”

  7. 1) IEEE 802.11a be permitted to operate in these bands • Yes, BT support the introduction of IEEE 802.11a in these bands • Co-existence with HIPERLAN 2 should not be a problem • This will enable an easier migration from the 2.4 GHz band to the 5 GHz band

  8. 2) HIPERLAN 0 is excluded • BT believe that the primary reason for introducing “HIPERLAN 0” would be to enable IEEE 802.11a • We do not support the development of “UK only” variants, but support harmonisation • Therefore, we support: • acceptance of IEEE 802.11a • rejection of HIPERLAN 0

  9. 3) Band Partitioning plan • BT support the proposed band partition, except for: • We believe that HIPERLAN 2 & IEEE 802.11a should also be able to use 5150 - 5250 MHz • We propose that licensed (public access) systems should be located at the lower end of the 5470 - 5725 MHz band

  10. 4) Licensing and regulation issues should follow from the partitioning of the band • Any partitioning of the band will define the licensing and regulation requirements • However band partitioning should be limited to the minimum required • Similarly, licensing and regulation should also be minimised

  11. 5) Licence exempt spectrum for private networks should remain • Certainly - Private networks using licence exempt spectrum was the original intention • This is likely to remain the main market for RLANs • However, in addition there are now new requirements (including public access)

  12. 6) Band partitioning is the key issue • Definitely! • How can we make best use of the available spectrum, taking account of: • the needs of the varying applications of RLANs • the various types of RLANs • the restrictions placed by the other users of the bands

  13. Questions to be considered BT propose that the following questions be considered before a decision is made on spectrum partitioning between public and private systems: • What would be the relative demands for the two systems? • How close (geographically) would public and private systems typically be located?

  14. Would it be possible for public and private access systems to share a given frequency band (e.g. 5470 - 5650 MHz) if one of the systems operate at a lower EIRP in that band? • Would it be possible to offer a satisfactory quality of service for a public service in a shared band? • Would it be possible to obtain European wide agreement for part of the band to be used on a public access only basis?

  15. In conclusion • BT believe that there is a need for both public & private RLAN systems in the 5 GHz bands • BT believe that the bands should be used primarily by HIPERLAN 2 & IEEE802.11a • How should the spectrum be best used to support both applications and technologies?

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