Overview of Standards and Technical Reports

Overview of ARIB Standards (STD-T80)

1. Overview

STD Number ARIB STD-T80
Standard Name Digital Mobile Communication System for Local Government TYPE 2
Enactment Date 09.06.2001
General Description

This standard specifies air interface of Digital Mobile Communication System employing TDMA (Time Division Multiple Access) system for Local Government TYPE 2 (hereinafter referred to as “Public System”) among narrowband digital telecommunication systems using 260MHz band defined in Article 57-3-2 of the Ordinance Regulating Radio Equipment.

This standard refers to the TETRA (TErrestrial Trunked RAdio) system standardized by ETSI (European Telecommunications Standardization Institute).

In addition, this standard corresponds to the system employing 4-level digital modulation (π/4 shift QPSK) method and having 25kHz channel separation in the above Article of the Ordinance.

This system is composed of control station equipment, base station equipment, fixed station equipment and mobile station equipment in a basic unit of local government (municipality or prefectures). Communications are performed between control station and mobile station (or fixed station), or between mobile station (or fixed station) and mobile station (or fixed station) through base station or directly. Hereinafter communications between mobile station (or fixed station) and mobile station (or fixed station) show the ones through base station (Base station communications). Direct communications between mobile stations show communications not through base station.

In addition, this system employs TDM/TDMA system in which one radio carrier is separated in a frame unit and the frame is divided into 4 slots for obtaining multichannel.


2. Amendment History

Ver. Amendment or Enactment Date Amendment summary
2.0 05.29.2007

- Function enhancement to expand subject system to prefectures from municipality (city, town or village) only

- Change of title of standard from “Digital Mobile Communication System for Municipality TYPE 2” to “Digital Mobile Communication System for Local Government TYPE 2”

1.2 11.30.2005 Revision of the definition of spurious emission, etc., tolerance, interim measures, measuring method, etc. corresponding to the revision of technical standard for tolerance of spurious emission intensity
1.1 03.28.2002 Revision corresponding to the submission of confirmation notes relating to essential Industrial Property Rights
1.0 09.06.2001 Enactment

3 View Some (latest version)

full screen



TOP