At PMR Expo 2013, Hytera will launch its new DMR Trunking system to the European market. The system has been designed for sophisticated voice transmission and dispatcher communication and expands Hytera’s existing DMR products – launched in 2010 – to address trunking.
The Hytera DMR trunking system, developed from the ETSI DMR open standard, is an IP-based digital trunked system specially designed to provide mission critical voice, dispatching and management capacity for public security, public utility, transport and other industry users across various geographic areas.
By ensuring a smooth analogue to digital transition in spectrum, terminals and systems, the trunking system protects customers’ investments in analogue technologies by providing a transition path to digital communications.
New DMR repeater
The system has a modular design and is based on Hytera’s new DMR Repeater RD985S. That repeater can be used to either build DMR Tier II or Tier III networks, depending on the software configuration of the repeater. Both Tier II and Tier III are fully DMR ETSI compliant.
One benefit of the system is that it offers a modular concept to Hytera partners, so they are capable of adding their own value-add offerings and components according to customer needs.
In addition, the RD985S repeater can build a simulcast DMR network, which is a feature customers coming from the analogue simulcast world often request, says the company.
Hytera DMR Trunking offers a series of features in voice and data communications, safety functions and mobility management.
Voice and data featuresIn voice and data, these include: calling to individuals, groups, all users, broadcast calls and emergency calls; support of call priorities and emergency calls; text and status messaging, GPS data and packet data transmission; call monitoring and recording; call group tracking to fetch subscribers from another call into a group call with higher priority; and dynamic group number assignment (DGNA).
Safety functions offered by Hytera DMR Trunking include: end-to-end encryption of voice and data; encryption with 40, 128 or 256 bits with AES (Advanced Encryption Standard) and ARC4 (Alleged RC4); support of the DMR Association procedure for encryption transmission via the air interface; selecting and deselecting radio transceivers; and authentication.
Mobile management functions include: registration and deregistration, group login/logoff and roaming and handover.
The Hytera DMR Trunking base station is extremely reliable, says Hytera, because if the connection to the associated system controller node is lost, the base station continues to ensure operation in its radio cell. Radio subscribers registered at that base station can therefore continue to communicate.
In addition, a range of redundancy options are available to increase reliability. For example, if the first carrier fails, the control channel can be provided by the second carrier – delivering control channel redundancy. An additional base station control unit can also be integrated.
Other features include: a modular structure for ease of operation and maintenance, an antenna coupling system that can be adapted to customer requirements, connection to the system controller node via IP or E1, and easy-to-update software.