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Cesar A. Santivanez
Network Scientist
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[Short Bio] [Resume] [Projects]
[Publications]
[Patents] [Professional
Activities] [Awards] [Others] [Grupo
GIRA] [Tesis PUCP 2015] [Tesis
PUCP 2014]
Short Biography
I
am a Network Scientist in the Network
Research Group at BBN Technologies in Cambridge, MA.,
where for the past 10 years I’ve been conducting cutting edge research in the
general field of scalable
and efficient resource allocation architectures and algorithms for dynamic,
reconfigurable networks. I enjoy being engaged in all aspects of the research
cycle, taking an idea from conception to a working system, including:
developing the fundamental supporting theory, designing efficient yet scalable
and easy-to-implement algorithms, performance evaluation, prototype
implementation, and experimentation. I received B.Sc. and Eng. degrees from La Pontificia Universidad Catolica
del Peru (1993 and 1994, respectively), and M.Sc. and Ph. D. degrees from
Northeastern University, Boston, MA (1998 and 2001, respectively). All degrees
are in Electrical Engineering.
During my Ph. D. years at Northeastern University, and in
collaboration with Dr. Ram Ramanathan, I developed
the theory of MANET routing scalability. I then used this theory to derive Hazy Sighted Link
State (HSLS) routing, the first MANET routing protocol that is proven
to scale with respect to network size. HSLS – with subsequent extensions
to address particular environments, as for example the use of directional
antennas (UDAAN),
stringent energy constraints (JAVeLEN), availability of multiple radios/channel (PIRANA) -- has
become the basis for the routing protocols developed at BBN to target large
networks and highly dynamic environments. Due to its proven performance
guarantees and ease of implementation, it is not surprising that HSLS is also
the basis for the subnet routing protocol for the U.S. military’s main two
efforts in large scale ad hoc routing: the Joint Tactical Radio System (JTRS)
Wideband Network Waveform (WNW) and DARPA’s
Wireless Network after Next (WNaN)
program. In the broader community, HSLS has been adopted by several community
mesh wireless initiatives. Thanks to CuWin’s open source implementation, there
are HSLS instances running in all over the world (e.g. USA, Peru and Ghana). In
Europe, HSLS has been adopted
and extended by the MobileMAN project.
In the following years, I have been involved in the design,
analysis, and implementation of several routing and Medium Access Control (MAC)
algorithms exploiting new capabilities such as directional antennas (UDAAN),
opportunistic spectrum access (XG, SOSA), and Multi-User Detection (MUDMAC).
More recently, as a key architect for the PHAROS project, I
have focused on the design of architecture and algorithms for highly efficient
resource assignment for reconfigurable optical networks. The Petabit Highly Agile Robust Optical System (PHAROS)
project, part of DARPA's CORONET program, is aimed at providing global
high-capacity fiber-optic core services with unprecedented speed, agility, and
survivability. I was responsible for the design of the agile,
technology-agnostic, and highly efficient cross-layer
resource allocator (CRA) module that reconfigures the network resources (IP
routers, OTN switches, ROADMs, etc.) to efficiently satisfy diverse demands
with different QoS, call setup, and protection
requirements as well as diverse timescales and blocking probability targets.
The CRA is responsible – among other things -- for working path selection,
share protection computation, resource assignment and equipment configuration.
It uses multilevel topology abstractions (TA) in order to achieve global
multi-dimensional optimization over the fundamental dimensions of network
management: network extent, technology levels, route protection, and
timescales. TAs allow a given request to be optimized across the network,
simultaneously trading off costs of resources within individual network levels
as well as the costs of transit between levels (such as the optical-electrical
boundary). Resources of all levels can be considered, including wavelengths,
timeslots, grooming ports, and IP capacity. With this uniform approach, common
to all levels of resource representation and allocation, PHAROS accurately exploits
the capabilities of all network elements, while remaining independent of the
switching technology or vendor particularities.
In a past life I’ve been a Fulbright Scholar (1996 –
1998), received the best student paper award at MoMuc'98 Berlin, Germany
(1998), and won a silver medal at the IV Iberoamerican
Mathematics Olympics in 1989. I am a senior member of the IEEE, and a member of
the Phi Kappa Phi interdisciplinary honors society, and the Phi Beta Delta
international scholar’s society.
A list of my past and present projects at BBN, publications,
and other information can be found following the links above. A copy of my
resume can be found here.