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Security forces PMR networks are moving from proprietary
technologies for their "Mission Critical Push-To-Talk" basic
service, and their data services which must provide large bandwidth
real-time access, to the databases. LTE Based is adopted with
backup access to public MNOs to complement their own radio
coverage. Specific technologies such as multicasting of visio are
required so the MCPTT works within a restricted bandwidth. The need
to be able to change the main MNOs to provide resilient coverage
requires specific choices of SIM cards, with OTAble security
domains. Practical LTE Based Security Forces PMR Networks assumes
that the reader has a basic knowledge of the 4G network
architecture and services, and the book focusses on the specific
features and choices required to fulfill the need of security
forces PMR networks. These include tactical and centralized,
including LTE based voice services VoLTE and IMS. It can be used as
a reference or textbook, with many detailed call flows and traces
being included. The author, who has also a long teaching career in
Operations Research, provides mathematical models for the
optimization of tactical network federations, multicast coverage
and allocation of preemptive priorities to PMR group members. He is
a pioneer in the area of Virtual Roaming, an application of graph
theory and telecommunications to provide roaming without direct
relations, having previously published books on SMS Hubs, SS7 Hubs,
Diameter Hubs, GTP Hubs. The use of M2M (monitoring devices) for
security forces with mobility is covered in detail in the book,
including the new LoRa virtual roaming which goes beyond the scope
of PMR.
The subject is "Virtual Roaming for data services" and "Seamless
Technology change" also called "Number Continuity". "Virtual
Roaming for voice and SMS" was covered in one of the author's
previous book. "Virtual Roaming" means that it allows a subscriber
to visit a network which his home network does not have an
agreement with. The "Seamless Technology change" allows a user to
keep all his services including reception of calls and SMS sent to
his usual number when he switches his GSM to a Satellite phone or
to WiFi. The implementation of Seamless Technology change uses the
SS7 Roaming Hub and GTP Hubs technology explained in the first part
of the book. The book also contains chapters explaining in detail
the steering and anti-steering of roaming, LTE Serving Mobile
Location Centers, and Advanced Policy and Charging implementations
in LTE and 3G. This is to be used as an easy reference book. All
the relevant references to the standards are included chapter by
chapter. This is the first book on the two main subjects of Virtual
Data Roaming and Seamless Technology change. Keywords: Virtual
Roaming, Number Continuity, Seamless technology change, Policy
Charging and Control, LTE LBS, Steering of Roaming, GTP Hub, MMS
Hub,RADIUS Hub, DIAMETER Hub
SMS (short message service) and MMS (multimedia message service)
are two of the hottest services in wireless communications today,
offering customers exciting ways to communicate by sending text and
multimedia messages. This comprehensive book offers wireless
engineers and managers practical guidance in the planning and
implementation of SMS and MMS services with interworking (the
ability to successfully send a message when the origin and
destination cellular phones do not use the same wireless operator).
The book offers professionals various solutions to the common
problem of number portability (a situation when a cellular phone
has been "portedout" to another operator while keeping the same
number) and provides methods for blocking spam from inbound SMS.
Including numerous solved examples, this authoritative reference
helps practitioners master of the key concepts they need to
understand for their work in the field.
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