20 May 2014, Singapore-Caltta Technology Corporation, a subsidiaryof ZTE focusing on professional trunking launches the most innovative 2G+4Gdigital trunking solution at the world largest gathering of CriticalCommunications professionals CCW2014, which known as the first DMR and LTEconverged solution for mission critical communications. More than 100 companiesjoin the event and showcase their latest equipment and solutions, including mainstreamtelecommunications equipment suppliers such as Motorola, Rohill, Teltronic,Selex ES, and Alcatel Lucent.
In fact, PMR(Professional Mobile Radio) has been evolving from narrowband networks tobroadband networks with the coming of 4G era. Public safety departments have increasingrequirements for high-bandwidth applications such as big data, high-qualitypictures, and high-definition videos. Users in all sectors request not onlyaudio services but multimedia video services. Global known professional communicationsequipment manufacturers focus on the public safety-oriented mobile broadbandcommunication market, in an effort to integrate 4G technologies with narrowbandtrunking communication technologies based on voice and low-speed datatransmission. Major economies in the world basically select the narrowband (2G)+ broadband (4G) integrated networking mode, for example, America adopts P25+ LTE(Long Term Evolution) while EU adopts Tetra (Terrestrial Trunked Radio)+LTE.
The wirelessbroadband technology is indispensable to the application of mobile office,intelligence sharing, and multimedia communications. It effectively improvesthe event-responding efficiency as well as decision-making accuracy of publicsafety departments. In addition, the narrowband voice trunking technology hasirreplaceable advantages such as simple structure, large-cell coverage,convenient network planning, and strong invulnerability. Under this background,Caltta takes the lead in releasing the "2G+4G" digital trunkingsolution, which creatively integrates the 2G narrowband voice trunkingtechnology with the 4G broadband data and multimedia trunking technology,thereby implementing visualized multimedia command and dispatching with dataservices and voice communication equally valued.
Caltta "2G+4G"digital trunking solution, with the aim of converged services, converged switches,converged networks, and converged terminals, perfectly integrates the 2G DigitalMobile Radio (DMR) technology with the 4G LTE technology, where, DMR implementsseamless coverage of wide areas to guarantee personnel calls and emergency responsewhile LTE implements coverage of key areas to provide critical data servicesand enriched multimedia trunking functions. On the 2G+4G platform, the DMR and LTEtrunking technologies implement unified user management, grouping anddispatching; DMR stations and LTE stations support voice trunking, data interworkingand short message interworking. The "2G+4G" digital trunking solutionimplements smooth migration from MPT to DMR, strengthens the situationperception and information sharing capability, and therefore comprehensively improvesthe flattened command and collaborated combat capability.
The"2G+4G" digital trunking solution is a recombinant and smoothevolution platform focusing on openness, standardization, interconnection andinterworking. What’s more, Caltta "2G+4G" platform not only supportsthe access of DMR and LTE systems from different manufacturers but also takesfull account of the interoperability with TETRA system, thereby thoroughlyresolving the interworking problems of different manufacturers' equipment aswell as the compatibility problems between infrastructures and terminals andthus reducing the network cost.
Calttahas successfully deployed professional trunking systems and networks in morethan 40 countries and regions, with the system capacity of more than 3 million usersand commercially activated users of more than 1 million. In LTE field, ZTETrunking plays the leader in R&D capacities and commercial deployment. Ithas successfully deployed TD-LTE wireless private networks in Beijing, Tianjin,Zhengzhou, and other regions and has put them into operation, and has deployedprivate networks for the government, public safety, transportation, energy, andother sectors.