Table of Contents

Intellectual Property Rights
Foreword
Introduction
Executive summary
1 Scope
2 References
3 Abbreviations and definitions
   3.1 Abbreviations
   3.2 Definitions
4 Justification
   4.1 Applications
   4.2 Market
   4.3 Market position of Two Way Paging
5 Compatibility
6 The Two Way functions
   6.1 Acknowledgement
   6.2 Initiated message
   6.3 Canned messages
7 ERMES Two Way Protocol
   7.1 Time slot technique
   7.2 The forward channel modifications, general data
   7.3 New data format for the forward channel, message
       header
   7.4 The return channel data format
   7.5 The return channel messages format
   7.6 Transmission sequences
8 Traffic calculations
   8.1 The estimated number of Two Way subscribers in
       a network
   8.2 The estimated usage of the return channel
   8.3 Implementation of usage of the return channel in
       the protocol
   8.4 Systems with differentiated functionality
9 Return channel, data rates and output power
   9.1 Protocol A
   9.2 Protocol B
10 Spectrum use
   10.1 Frequency bands
   10.2 Frequency requirements
11 General
   11.1 Mobile battery life
   11.2 Link budget
   11.3 Effect of acknowledgement and re-transmissions
        on system capacity
12 Trials
13 Consequences for the different I-interfaces
14 Proposed structure for an updated ERMES standard
Annex A: Flowcharts
     A.1 Forward message to Two Way ermes pager
Annex B: Details protocol A
     B.1 Required number of subslots in MITS
History

Abstract

Covers a feasibility study of an ERMES Two Way Paging system. The system design should be sufficiently detailed to prove the feasibility of the solutions chosen.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	ERM RP04