Browse Prior Art Database

METHODS FOR DYNAMICALLY ADJUSTING A SUPERFRAME TO REDUCE MESSAGE LATENCY

IP.com Disclosure Number: IPCOM000008105D
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2002-May-17
Document File: 2 page(s) / 92K

Publishing Venue

Motorola

Related People

Patrick Baumann: AUTHOR [+3]

Abstract

A digital radio system based on the MCI DMCA Standard consists of a fixed network and a number of mobile subscriber units, such as radios or cellular telephones. As a portion of the fixed net- work, Base Repeaters (BRs) provide a plurality of communication channels configured in a Time- Division Multiple-Access (TDMA) fashon. In our example, one frequency is divided into six time slots, each containing 15 milliseconds of data. One of the BRs provides a control channel slot and sev- eral trafftc channel slots, while the remaining BRs provide traffic channel slots only. Mobile radio sys- tem access and control occurs over the control channel. The control channel carries most of the control-related messages in the system including, but not limited to: origination requests, channel assignments, power control, time alignment, system configuration, and system resource availability.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 50% of the total text.

Page 1 of 2

MOTOROLA Technical Developments

METHODS FOR DYNAMICALLY ADJUSTING A SUPERFRAME TO REDUCE MESSAGE LATENCY

by Patrick Baumann, George Heinz and Alan Grau

INTRODUCTION

  A digital radio system based on the MCI DMCA Standard consists of a fixed network and a number of mobile subscriber units, such as radios or cellular telephones. As a portion of the fixed net- work, Base Repeaters (BRs) provide a plurality of communication channels configured in a Time- Division Multiple-Access (TDMA) fashon. In our example, one frequency is divided into six time slots, each containing 15 milliseconds of data. One of the BRs provides a control channel slot and sev- eral trafftc channel slots, while the remaining BRs provide traffic channel slots only. Mobile radio sys- tem access and control occurs over the control channel. The control channel carries most of the control-related messages in the system including, but not limited to: origination requests, channel assignments, power control, time alignment, system configuration, and system resource availability.

  The control channel slots are further organized in a superframe by concatenating a number of sequential control channel slots into a structure. Each structure or superframe contains, but is not limited to: broadcast information and control infor- mation. Broadcast information usually occupies the first slot in the superframe, while control informa-

tion for the subscribers is distributed among the control slots using a predetermined algorithm known by the fixed network and the radio. This allows a radio to extend battery life by listening to a reduced number of slots when the subscriber i...