Terminology » Mobile Communication » PMR vs Cellular: Key Differences Explained

PMR vs Cellular: Key Differences Explained

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This article explains the basics of PMR (Private Mobile Radio) and Cellular technologies, highlighting the key differences between them. We’ll explore their features and applications to provide a clear understanding of each technology.

What is PMR (Private Mobile Radio)?

PMR stands for Private Mobile Radio System. In this system, a wide range of users have their own dedicated radio systems. In the United States, it’s known as SMR (Specialized Mobile Radio), and in the United Kingdom, it’s referred to as PBR (Private Business Radio).

PMR Infrastructure

In a PMR radio system, users establish and maintain their own radio network infrastructure. This includes unique mobile sets and the necessary infrastructure to support PMR operation.

Refer to PMR radio frequency channels for more details.

Key Features of PMR

  • Data Rate: Supports data rates ranging from 500 bps to 4 Kbps.
  • Frequency Bands: Operates in VHF (Very High Frequency) and UHF (Ultra High Frequency) bands.
  • Coverage: Provides coverage over a distance of 10-12 Km.
  • Data Transmission: Transmits data over the voice channel.

Cellular Technologies: A Network of Cells

Cellular technology refers to a communication method where a geographical region is divided into smaller areas called “cells.” Base stations are strategically placed within each of these cells.

These base stations manage and allocate resources like time slots, frequencies, and codes to mobile users within their cell. Communication occurs through the base station; in essence, the call flow routes through it.

Various cellular technologies exist, including GSM, CDMA, and LTE. These technologies have evolved to meet different requirements related to frequency, bandwidth, and data rates.

Quick Comparisons

For a quick overview, here are some fundamental differences between PMR and Cellular systems:

FeaturePMR (Private Mobile Radio)Cellular
OwnershipPrivate, dedicated to specific usersShared infrastructure
InfrastructureUser-managedNetwork operator-managed
Coverage AreaLimited, typically 10-12 kmWide area, spanning multiple cells
Data RateLower, up to 4 KbpsHigher, depends on technology (GSM, LTE, etc.)

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