This document does not necessarily represent a U.S. position and is subject to change
ITU-R FACT SHEET
Working Party: WP 5C Document: USWP5C-12/01_final
Date: April 30, 2012
Document Title: Fixed System Characteristics for Studies Related to WRC-15 Agenda Item 1.1
Phone E-mail
Authors: Charles Glass 202-482-1896
Purpose/Objective:
To provide a list and discussion of appropriate ITU-R Recommendations/Reports for Fixed Service characteristics and protection criteria for use in sharing studies to be carried out in JTG 4-5-6-7 for additional spectrum allocations to the mobile service on a primary basis and identification of additional frequency bands for International Mobile Telecommunications (IMT) and related regulatory provisions, to facilitate the development of terrestrial mobile broadband applications.
Abstract:
This document provides a list of appropriate ITU-R Recommendations and Reports for Fixed Service characteristics and protection criteria. In addition, discussion elements will be included to indicate appropriate modeling of fixed service systems were not provided in existing Recommendations/Reports.
Fact Sheet Preparer: Charles Glass
Reference: Agenda Item 1.1
UNITED STATES OF AMERICA
General Discussion
The United States believes that WRC-15 Agenda Item 1.1 is an important item and a significant amount of work is required to realize the potential new allocations to the mobile service to facilitate mobile broadband applications.
To address this need, and the short time period for required studies and development of required CPM text, the United States has provided a draft Liaison Statement to JTG 4-5-6-7 to facilitate their work as the responsible group. This draft liaison statement is attached.
As a contributing group, WP 5C needs to provide required technical and operational characteristics and modeling input to JTG 4-5-6-7 to ensure that required work for this agenda item is accomplished prior to WRC-15.
Proposal
The United States would request that WP 5C take the draft liaison statement to JTG 4-5-6-7, and the information found in it, as a baseline for discussions in providing JTG 4-5-6-7 the needed fixed service information as a contributing group on WRC-15 Agenda Item 1.1.
Radiocommunication Study Groups /Agenda Item: 1.1
Reference: 5C/5 / Document 5C/xxx-E
30 April 2012
English only
Working Party 5C
Liaison statement to Joint Task Group 4-5-6-7
Fixed service characteristics, protection criteria and modelling for WRC-15 Agenda Item 1.1
As a contributing group for WRC-15 Agenda Item 1.1, WP 5C would like to provide JTG 4-5-6-7 with as much of the necessary information needed to carry out sharing studies between the existing primary fixed service and mobile broadband stations. WP 5C will of course provide any further information or clarifications sought by JTG 4-5-6-7 as requested.
Fixed Service Characteristics
Appropriate fixed service characteristics for sharing studies between fixed service and mobile broadband stations can be found in Recommendation F.758. WP 5C would request that compatibility should be established with the example systems found in these recommendations to determine the viability of any new mobile allocation in fixed service bands.
Protection Criteria
Protection criteria for fixed systems can be found in Recommendations ITU-R F.758 ITU-R F.1334, and F.1565.
Modelling
Fixed systems antenna and modeling considerations can be found in Recommendations ITU-R F.699, F.1245, F. 1334, F. 1336 and F.1518. Annex 2, section 2.2 should also be considered when modeling fixed systems for sharing with mobile systems. As a first level look to determine the feasibility of selecting any fixed service bands for further studies, a distribution of 60%, 30% and 10% for urban, suburban and rural link deployments can be used. Stations should be in paired links with random distances (within the same zone) and elevation angles (00 – 300) Each link should be modeled using appropriate channels from the fixed service channeling plans found in the following Recommendations (F.746 provides guidelines and compilation of channeling plans):
F.382, F.383, F.384, F.385, F.386, F.635, F.701, F.1099, F.1242, F.1243, and F.1488 for bands between 1 GHz and 10 GHz. WP 5C has no channeling plans for systems operating between 100 MHz and 1 GHz as such systems are usually used for last mile connectivity and are not easily classified into a set channel plan. A statistical probability of interference can be derived by evaluating each link pair individually to determine if the required short or long term interference criterion is exceeded from the aggregate of the mobile receivers. An overall review of the percentage chance of negative impact can be determined by determining the percentage of link pairs that have their criteria exceeded (should be expressed separately for short term and long term interference). The appropriate P series recommendation should be used to determine the ground propagation model to be used for each appropriate candidate band.
Contact: TBD E-mail: TBD