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Role of Land Mobile Radio in Public Safety Communications - Standards, Markets and Technologies
PracTel Inc, Jan 2012, Pages: 250+
The goal of this report is to update (2012) of LMR-related reports published by Practel in 2010-2011. The report is written for a large audience of technical, managerial and sales staff of companies involved in the design, manufacturing and utilization of Land Mobile Radio; with the emphasis on Public Safety Communications (PSC) applications.
Particular, this report includes:
1. The updated analysis of the phased development of P25 radio. The current status of the technology, markets and standards and survey of vendors are presented. Though the standardization process started almost twenty years ago, commercialization is still slow; and the market development is unsatisfactory. This situation is addressed by all parties involved in the PSC development in the U.S.
2. The updated analysis of the phased development of TETRA radio. This technology found more geographically spread market segments than P25. Its Release II offers a combination of voice and data transmission that brings sufficient benefits to the users; but the growth of markets still does not satisfy the TETRA community.
3. The analysis of major trends in the P25 and TETRA radio developments, including a) Software Defined Radio – SDR. SDR platforms bring many benefits for PSC, including multi-band transmission and interoperability, b) Utilization of the 700 MHz band, c) Wider acceptance of broadband services.
4. The updated analysis of narrow-banding LMR radios, including NXDN and MOTOTRBO. The NXDN radio development is a result of joint efforts of two companies, Icom and Kenwood and it is based on the FDMA technology. The companies developed two lines of products, IDAS (Icom) and NEXEDGE (Kenwood); these radios were implemented with many advanced technological features, including 6.25 kHz channels. At the same time, Motorola introduced its MOTOTRBO line of digital LMRs, which also utilized newer technologies and is based on the TDMA technology.
5. The analysis of the 4.9 GHz radio technology for broadband PSC. The FCC allocated the 4940-4990 MHz spectrum for broadband PSC. The technology can utilize the existing Wi-Fi ICs, and it supports long-reach communications with speeds 50 Mb/s and up. It utilizes a) OFDM, b) Multi-radio platforms, and c) Self-healing and self-organized mesh topology. One of the major 4.9 GHz radio applications for PSC is temporary fast-deployable networks.
Practel will continue the analysis of LMR technologies and markets trends: dynamics of developments require a periodical update of reports.
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