Hooman joined Award Solutions in 2004, bringing his
expertise in GSM and UMTS technologies. He has worked with practical
implementations of E911 services and handset positioning and location-based
technologies. In these areas Hooman has authored and designed numerous course
materials as well as eLearning programs. Hooman Razani has over 10 years of
industry experience in the area of technology training and consulting, in the
field of advanced wireless data communication systems.
Hooman began his career in the wireless
telecommunication industry in 2000. He joined a training and consulting company
with focus on wireless communication and IP technologies in Stockholm, Sweden.
He is familiar with specific aspects of wireless network deployment in the
European and American markets.
Hooman focuses in the 3GPP technologies which include UMTS/HSPA,
HSPA+ and LTE. In his role as a Senior Consultant at Award Solutions, Hooman
has been involved in the creation and delivery of numerous courses in the area
of RF and network performance engineering for tier 1 operators. He has
conducted workshops and consulting projects with the aim of troubleshooting, and
performance improvements. These include best practices and KPI definitions,
vendor specific algorithm analysis and parameter descriptions.
Besides his role as a consultant,
Hooman regularly delivers advanced technology courses in the 3G and 4G domains.
holds a BS degree in Applied Physics from the Royal Institute of Technology in
long ago, Verizon Wireless (VzW) released their initial LTE device
requirements intended for 3GPP band 13 (700MHz). The document which is
in the public domain is full of interesting information about the shape
of things to come on the LTE front. By reading it, one can get a decent
idea about the first LTE devices that will be commercially available.
Here is a brief summary.
the most conspicuous fact is the absence of voice services in the
Services description. VzW will be providing packet data service
initially. This was expected and is quite in line with previous
technology enhancements such as HSPA and DO. These devices were launched
as PC-cards initially and later USB modules, before the technology was
integrated with the traditional handset form, supporting voice.
SIM card is supported from the outset, but more interesting is the
requirement for the IMS-based SIM or ISIM. This is an obvious reflection
of VzW's interest in IMS as the platform for IP-based service
convergence. As an example, SMS will be supported over IMS.
the technology side, we note the explicit disregard for TDD operation,
which would not be suitable for the 10 MHz paired band operation in band
13 in any case. The device category is given as 1, 2 or 3. This will
ultimately dictate the device's data rate performance. A peek in the
specification for category 3 (TS 36.306) puts the peak rate at about
102Mbps. Yes, this may be "ain't gonna see it" type of data rate,
however keep in mind that the same "ain't gonna see it" rate for the
fastest HSDPA device is 13.9Mbps. If you were like me when I was a kid,
then you know that comparing these numbers is just like peeking at the
car dashboards in an auto-show to see which one has a higher max speed
printed on the speedometer. The car with the highest reading, had all my
antennas are supported and the VzW requirement is in line with the
specifications. Category 2 and 3 devices must support multiple antenna
operations in MIMO mode, not just receive diversity. Only one
transmitting antenna is required (and at least two receiving) at the
device in Release 8, however it should be possible to switch the
transmitter output between a primary and secondary antenna as required.
the IP side, the device is required to support simultaneous IPv4 and
IPv6 sessions. Up to 3 IP addresses should be supported and connectivity
to multiple PDN-Gateways is a requirement. IP-mobility
is handled by GTP or PMIPv6 and this does not have any impact on the
device which can attach to the network using Simple IPv6
LTE, VzW will forever put behind their well known limitations regarding
international roaming. The LTE device is required to support at least
70 network entries. However, a packet-only device is a notorious
generator of exorbitant international data roaming charges! It will be
interesting to see how Vzw and their international partners deal with
the pricing points for data roaming in the near future.
The game continues, and the ball is about to pass the net and drop on AT&T's court.
I am newbie to LTEuniversity. I am looking forward for more.