WRC 2019 Agenda Item Details

Agenda Item: Agenda Item 1.16
Resolution(s): Resolution 239 [COM6/22] (WRC-15)
Description of work:

This agenda item relates to consideration of issues related to wireless access systems, including radio local area networks (WAS/RLAN), in the frequency bands between 5 150 MHz and 5 925 MHz, and take the appropriate regulatory actions, including additional spectrum allocations to the mobile service, in accordance with Resolution 239 [COM6/22] (WRC-15).

The ITU-R is invited to:

  1. study WAS/RLAN technical characteristics and operational requirements,
  2. conduct studies with a view to identify potential WA/RLAN mitigation techniques to facilitate sharing with incumbent services at 5 150 - 5 350 MHz, 5 350 - 5 470 MHz, 5 725 - 5 850 and 5 850 - 5925 MHz,
  3. to perform sharing and compatibility studies in the band 5 150 - 5 350 MHz of the possibility of enabling outdoor WLAN/RLAN operations
  4. to conduct further sharing and compatibility studies between WA/RLAN applications and incumbent services at 5 350 - 5 470 MHz addressing:
    1. whether additional mitigation techniques would provide coexistence with EESS (active) and SRS (active) systems,
    2. with radio determination systems and,
    3. hence whether an allocation could be made to the mobile service for use by WAS/RLANs,
  5. to conduct detailed sharing and compatibility studies including mitigation techniques between WAS/RLAN and incumbent services in the band 5 725 - 5 850 MHz with a view of enabling a mobile service to accommodate WAS/RLAN use, and
  6. to conduct detailed sharing and compatibility studies including mitigation techniques between WAS/RLAN and incumbent services in the band 5 850 - 5 925 MHz with a view to accommodating WAS/RLAN use under the existing mobile allocation while not imposing any additional constraints on the existing services.
Comments: This AI was a hot topic at WRC-15 and at times it looked like it would not be agreed. It has rumbled on studies of RLANs in 5 150 - 5 250 MHz in the cycle running up to WRC-2000 and then was expanded during intense discussions at following WRCs. The topic is driven by increased demand for spectrum for RLAN applications, in particular for wider bandwidths capable of higher data rates. Hence there is RLAN industry interest in continuous spectrum but there is currently a gap at 5 350 - 5 470 MHz. However this is used by EESS (active) and SRS (active) sensors for which there has been significant investment by space agencies around the world to support global environmental monitoring. There have also been suggestions that a better way to meet the RLAN spectrum and bandwidth requirements could by using higher frequencies and that regulations in other bands could be modified without harming incumbent services, both possibilities which require further study.
Lead Working Party(s): WP 5A
Involved Working Parties: WP 1B, WP 3J, WP 3K, WP 3M, WP 4A, WP 4C, WP 5B, WP 5C, WP 5D, WP 7C
How Visualyse products can help: Visualyse Professional can be used to model the wide range of services and systems identified in this AI. Indeed, it has been used in many previous studies in the last study cycle and previous cycles back to the development of Recommendations relating to the 5 150 - 5 250 MHz band back in 2000. Visualyse Professional can model fixed, mobile (WAS/RLAN and other), FSS, EESS (active), SRS (active), non-GSO MSS feeder links, radio determination and location, ITS and others. It includes propagation models that can be used for terrestrial paths, air to ground / ground to air and Earth to space / space to Earth paths. It can include traffic modelling and aggregation effects, both co-frequency and non-co-frequency analysis using a range of methodologies including static, dynamic, area and Monte Carlo. It includes the ability to model mitigation methods including indoor attenuations and listen before transmit functionality.
How Transfinite consultants can help: We can undertake studies including analysis of sharing between the services covered by this agenda item, and identify suitable system characteristics and sharing criterias, and provide contributions and representation at the ITU-R WPs. Using our in house Visualyse Professional we can quickly model a very wide range of systems, services and scenarios. We have particularly good experience in studies relating to RLAN having been involved in the development of a number of related ITU-R Recommendations (S.1426, S.1427, M.1454 etc.) and actively worked within the last study cycle supporting clients with interest in RLAN sharing studies at 5 GHz at a national, regional (CEPT) and international (ITU-R) level.
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