*Curriculum Vitae*

**Dr. KOTIKALAPUDI SRIRAM (Sriram)**

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**US: +1 (301) 975-3973 (W)**

**E-mail: ksriram25 at gmail.com , ksriram at nist.gov**

**Web: <http://www.antd.nist.gov/~ksriram/>**

**EDUCATION:**

-   Ph.D. in Electrical Engineering, Syracuse University.

-   M.S. in Electrical Engineering, Indian Institute of Technology,
    Kanpur, India.

-   B.S. in Electrical Engineering, Indian Institute of Technology,
    Kanpur, India.

    **HONORS AND AWARDS:**

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-   Promoted to **Consulting Member of Technical Staff at Bell
    Laboratories**, March 2000 (less than 1% of Bell Labs engineers are
    appointed to this position -- at the time of appointment, about 100
    were CMTS out of 25,000 engineers in all of Bell Laboratories).

-   Patent on QOS methods for VOIP recognized by the ***MIT Technology
    Review Magazine*** as one of five **"Killer \[Life Changing\]
    Patents"** in 2003, picked out of a total of 155,000 patents issued
    in 2003. This was based on work I did with Bell Labs colleagues
    in 1998. Patent title: "Method for providing quality of service for
    delay sensitive traffic over IP networks," U.S. Patent No.
    6,529,499, March 4, 2003.

-   **Fellow of the IEEE** (Jan. 2000). **Citation**: *For the
    development of performance models, algorithms, protocols, and
    bandwidth management techniques for multimedia high-speed packet
    networks.*

-   Nominated for Fellow of Bell Laboratories in 2001 (one of only 12
    candidates nominated in that year).

-   Promoted to **Distinguished Member of Technical Staff at Bell
    Laboratories**, February 1989 (about 10% of Bell Labs engineers are
    appointed to this position).

-   Received three patent excellence awards from AT&T Business
    Communications Services (1992-95).

-   Two patents nominated in 2001 for Lucent Technologies 'Hall of Fame
    Patent' awards.

-   Keynote speaker at the *International Teletraffic Congress:
    Specialists\' Seminar*, Crackow, Poland (1991).

-   Gave invited short courses on Voice/Data Communications Networks as
    a visiting scholar at universities in Chile, Malaysia, and India.

-   Currently serving as a TPC member for IEEE INFOCOM (2008-2010).

-   Served as technical area editor for the *IEEE Communications
    Letters* and the *IEEE Communications Surveys* journals (1998-2001).

    **BOOK:** Contributing author and a coeditor of ***Cable Modems: New
    Technologies and Applications***, published by the *IEEE* *Press*
    and the *International Engineering Consortium* (1999).

    **PATENTS:**

    Sixteen patents have been issued. Please see list at the back. Some
    additional patents are pending. Wide range of inventions related to
    Agile Optical Networks, VOIP, Voice over ATM (VoATM), QOS in
    High-Speed Packet (IP/ATM) Networks, Cable Modems, Hybrid Fiber-Coax
    (HFC) and Wideband Wireless Access Networks.

**[WORK EXPERIENCE (National Inst. of Standards and Technologies (NIST),
September 2002 to present)]{.underline}:**

# Senior Research Engineer, Advanced Network Technologies Division - Responsible for defining and leading research projects in Internet Routing Infrastructure Security, Wireless Access Networks, and Network Architecture and Performance. Leading multiple small teams of researchers and guest scientists on various research projects.

# BGP Security: Lead investigator evaluating Internet Routing Protocol (BGP) vulnerabilities using large-scale simulations; Comparing the performance and effectiveness of solutions for BGP security; Regularly representing NIST in the IETF and NANOG meetings; Project funded by the Dept. of Homeland Security (DHS). Recently published a detailed paper in the *IEEE JSAC*, special issue on Network Security (October 2006). Also co-authored a NIST 800-series recommendation on BGP Security (issued July 2007).

# Seamless Mobility in Heterogeneous Wireless Access Networks: Investigating efficient methods of call hand-off and resource allocation for seamless mobility in heterogeneous wireless access networks; Extensive network simulations have been performed in collaboration with researchers in South Korea. Paper to be presented at the *IEEE Globecom* 2007 and a detailed paper submitted to *IEEE Trans. on Vehicular Technology*. 

**Optical Burst/Packet Switching:** Project leader for internal NIST
project on Optical Burst/Packet Switching; architecture studies and
performance modeling; also serving as a Member of the Board of Directors
of the OBS Forum; close interactions with DARPA.

**Agile All-Optical Wavelength Switch (WXC) Architecture:** I have lead
research work and guided several researchers in projects related to
Agile Optical Switching Networks. Developed extensive
analytical/simulation models to show performance and cost advantages of
dynamically assignable regenerators over regenerators with fixed
directionality in wavelength cross-connect switches (WXC). Enhanced the
NIST GLASS (GMPLS Light-wave Agile Switching Simulator) tool for this
research.

**Optical Protection & Restoration Schemes:** Developed extensive
analytical/simulation models to quantify and evaluate proposals based on
the CCAMP Study Group activity in the IETF.

**[WORK EXPERIENCE (Innovance Networks, July 2001 to September
2002)]{.underline}:**

# Senior Network Architect: Responsible for the Agile Optical Network control plane architecture, protocols, performance and reliability modeling. Also worked on algorithms for efficient resource allocation and dynamic provisioning for implementation in the AgileCore Optical Switching System. Developed novel algorithms for dynamic wavelength management, which are being implemented in the product. A patent has been filed on these algorithms.

# Played a major role in setting up a large simulation system of Network Elements and performed extensive performance studies to identify processor overload conditions and devised ways to mitigate them. A number of performance measures associated with connection processing delays, reliability and processor utilization were measured and carefully analyzed to create in depth understanding of the system. Developed extensive models to ascertain system and Call Management Function (CMF) reliability. Setup a process for MTTR and MTTF data collection during verification. Predicted the reliability/availability for field operation.

**[WORK EXPERIENCE (Bell Laboratories, October 1983 to July
2001)]{.underline}:**

**Storage Switch with Fabric Centric Storage Controller Functions
(2000-2001):**

Architecture/performance study of a storage switch with Fiber Channel
(FC) switch functionality and high-end fabric-centric storage controller
functionality; Developed methods for large data cache management within
the SS and developed analytical models for performance predictions and
cache sizing.

#### Algorithms for Automated Design and Planning of Multi-Domain Optical Networks

**(2000-2001):**

Developed detailed algorithms for design, bandwidth provisioning and
routing over multi-domain SONET/SDH networks. These are complex networks
consisting of multiple domains with equipment from multiple vendors. The
algorithms help in optimally designing the network and in provisioning
disjoint paths over multiple domains while maximizing the utilization of
the network bandwidth. The algorithms have been presented to Lucent
Technologies' Optical Networking Group for implementation in the
Wave-Star^t^ Transport Management System.

**Protocols for Integration of Multiple Services over an Optical
Transport Link:**

Developed a protocol called Multi-service Over Byte-stream (MOB) for
bandwidth efficient integration of multiple services (e.g., ATM, TDM,
IP) over a common optical communication link. This protocol allows
statistical multiplexing of packet data with flexibility to
simultaneously provide TDM multiplexing for some of the traffic streams.
Recently received a patent on this invention (U.S. Patent No. 5,936,965,
August 10, 1999).

**Design of Metropolitan Optical Networks for MSOs and Wireless Service
Providers:**

Designed Optical Metro-Networks for both Multi-Service Operators (MSOs)
and Wireless Service Providers (WSPs). Multiple types of traffic (e.g.,
VoIP, IP data, Voice/Data over AAL2/AAL5) are aggregated at an MSO's
head-end or a WSP's Base Stations. The multi-service aggregate traffic
is transported to MSO Hubs or Mobile Switching Centers (MSCs). I was the
lead engineer doing network designs for these access applications, and
comparing the QoS and economics of various transport
architectures/protocols including TDM, MPLS, IP, and ATM.

**Cable Modems and Hybrid Fiber Coax (HFC) Networks:**

Played a leading role in designing the Medium Access Control (MAC)
protocols and bandwidth management algorithms for cable modems and HFC
networks to support Internet data applications. Showed through
performance modeling that variable-length protocol data units and
dynamically variable request mini-slots result in high bandwidth
efficiency in MAC protocols for cable modems. Influenced by my work,
these important MAC protocol concepts are now part of the IEEE LAN/MAN
802.14 (approved draft) standard as well as the specification on cable
modems (DOCSIS) adopted by a prominent cable industry consortium (latter
available at http://www.cablelabs.com/cable-spec.html). The recent work
in this area also included design of QoS and Bandwidth Management
algorithms for Lucent's CMTS product, and extensive interactions with
Lucent's customers as a technical product specialist. I am a co-inventor
on several patents related to protocols and algorithms used in cable
modems.

**Wireless Network Architectures and Protocols:**

Worked on network design and performance characterization of TDMA and
CDMA wireless access networks. Conducted a major economic study
comparing various transport alternatives -- ATM/AAL2, ATM/AAL5, IP, and
MPLS -- for transport of voice and IP data over wirleless access
networks. Working closely with the development teams to transition these
design concepts into product architecture and implementation. I am a
co-inventor on two pending patents in this area.

**Integrated Packet Voice/Data Networks (IP, ATM, Frame Relay):**

My early work on packetized voice and data networks has received
industry-wide and international recognition. I was the principal author
and technical contributor of an *IEEE JSAC* (Sept. \'86) paper, which
provided major insights into the nature of traffic burstiness and
correlations, and their impact on the performance of packetized voice
and data multiplexers. This classic paper and several other papers of
mine are noted for providing significant understanding of the intricate
interplay of packet delay/loss performance, buffer sizing, and selective
load shedding in multiplexers supporting bursty sources.

A patent of mine (issued April '90, No. 4, 914,650, sole inventor) has
served as a foundation for QoS management based on per-class queuing and
dynamic bandwidth allocation via weighted fair queuing. The concepts in
this patent show how in an integrated packet network the QoS of one
traffic type can be protected from the bursty (unpredictable) nature of
another type of traffic. A follow-up patent (issued October '95, No.
5,436,620, sole inventor) further extended the invention to integrated
multi-service high-speed packet networks supporting diverse traffic
types and QoS requirements. The inventions described in these two
patents are now used ubiquitously in gigabit packet routers and IP/ATM
switches. I closely worked with the development teams and contributed to
the architecture and design of several Lucent Technologies\' products
that have implemented the above-mentioned inventions. These products
include Packet Star 6400 IP switch, GX550 and Globeview 2000 ATM
switches, and IACS -- packet voice gateway used in over 50 countries.
The two patents mentioned above have been nominated for Lucent
Technologies 'Hall of Fame Patent' awards.

**Voice over IP (VoIP) and Voice over ATM (VoATM):**

I worked closely with development teams on design and architectures of
Lucent's MX1000 ATM access switch for VoATM and the Packet Voice Gateway
(PVG) for VoIP. I have developed and patented algorithms for dynamic
playback-delay control and QoS management for packet voice transport
over IP and ATM networks. These algorithms help mitigate the effects of
network congestion. I have also contributed significantly to the ATM
Forum Voice Telephony over ATM (VTOA) specification. Here, I solved the
ATM Adaptation Layer 2 (AAL2) sequence number sizing problem using
performance modeling, presented the results at ATM Forum VTOA and
ITU-T/SG-13 meetings, and my recommendation on the size was unanimously
accepted.

**SERVICE TO THE PROFESSION:**

-   Served as technical area editor for the *IEEE Communications
    Letters* (1998-2000)*.*

-   Served as technical area editor for the *IEEE Communications
    Surveys* journal (1999-2001).

-   Keynote speaker at the *Internat. Teletraffic Congress:
    Specialists\' Seminar*, Crackow, Poland (1991).

-   Invited speaker at a number of sessions in several international
    conferences of IEEE, ACM, and SPIE.

-   Chaired a number of sessions in several international conferences of
    IEEE, ACM, and SPIE.

-   Gave invited short courses on Voice/Data Communications Networks as
    a visiting scholar at universities in Chile, Malaysia, and India.

-   Made significant contributions to developing new standards in Cable
    Modem technology, ATM and IP communications protocols and traffic
    management.

**AREAS OF RESEARCH INTEREST:**

Performance, scalability and security of Internetworking Protocols
(OSPF, BGP, S-BGP, so-BGP, MPLS, GMPLS); Seamless mobility in
heterogeneous wireless access networks; Metro and long-haul optical
systems and networks; Architecture, protocol design, and performance
analysis of communications networks; Resource management and congestion
control methods for high-speed packet and GMPLS optical networks; Medium
Access Control (MAC) protocols; Voice over ATM; Voice over IP; Hybrid
Fiber Coax (HFC) networks; Fiber To The Curb (FTTC) and Asynchronous
Digital Subscriber Loop (ADSL) systems; Integrated voice/data networks,
Applied probability and stochastic processes.

**MEMBERSHIPS:** IEEE Communications Society (IEEE Fellow); IETF SIDR,
RRG, and RPSEC groups, OBS Forum (Member of the BOD); IEEE 802.14
Standards Working Group (work concluded); SCTE-DCS Standards Working
Group (work concluded); the ATM Forum VTOA Committee (work concluded).

**OTHER INTERESTS:** Tennis; Yoga and meditation; Keen student of
Vedanta and Buddhist philosophies.

**PERSONAL DATA:** US Citizen

PATENTS:

  ---- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  1    [6,813,277](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method and apparatus enabling multiple access on a broadband communication
                                                                                                                                                                                                                            network](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  2    [6,674,744](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=2&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Point-to-point data transport over the internet utilizing label switching without IP
                                                                                                                                                                                                                            headers](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=2&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  3    [6,529,499](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=3&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method for providing quality of service for delay sensitive traffic over IP
                                                                                                                                                                                                                            networks](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=3&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  4    [6,349,138](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=4&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with
                                                                                                                                                                                                                            descrambling](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=4&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  5    [6,282,196](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=5&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Dynamic build-out approach for use in packet voice
                                                                                                                                                                                                                            systems](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=5&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  6    [6,219,339](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=6&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method and apparatus for selectively discarding
                                                                                                                                                                                                                            packets](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=6&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  7    [6,169,738](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method for call admission in packet voice system using statistical multiplexing and dynamic voice
                                                                                                                                                                                                                            encoding](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  8    [6,075,798](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=8&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Extended header for use in ATM adaptation layer type 2
                                                                                                                                                                                                                            packets](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=8&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  9    [6,055,242](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=9&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)    [Method and apparatus enabling synchronous transfer mode, variable length and packet mode access for multiple services over a broadband communication
                                                                                                                                                                                                                            network](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=9&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  10   [6,041,051](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=10&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network utilizing an adaptive digital access
                                                                                                                                                                                                                            protocol](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=10&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  11   [5,953,344](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=11&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Method and apparatus enabling enhanced throughput efficiency by use of dynamically adjustable mini-slots in access protocols for shared transmission
                                                                                                                                                                                                                            media](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=11&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  12   [5,936,965](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=12&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Method and apparatus for transmission of asynchronous, synchronous, and variable length mode protocols multiplexed over a common
                                                                                                                                                                                                                            bytestream](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=12&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  13   [5,570,355](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=13&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Method and apparatus enabling synchronous transfer mode and packet mode access for multiple services on a broadband communication
                                                                                                                                                                                                                            network](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=13&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  14   [5,463,620](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=14&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Bandwidth allocation, transmission scheduling, and congestion avoidance in broadband asynchronous transfer mode
                                                                                                                                                                                                                            networks](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=14&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)

  15   [4,914,650](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=15&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)   [Bandwidth allocation and congestion control scheme for an integrated voice and data
                                                                                                                                                                                                                            network](http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=15&f=G&l=50&co1=AND&d=PTXT&s1=kotikalapudi.INNM.&OS=IN/kotikalapudi&RS=IN/kotikalapudi)
  ---- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

**PUBLICATIONS:**

(In refereed journals and conference proceedings; also included are some
selected significant contributions presented at the IEEE 802.14 LAN/MAN
committee and the ATM Forum meetings)**:**

1.  K. Sriram, P. K. Varshney, and J. G. Shanthikumar, \"Modeling and
    Analysis of an Integrated Voice-Data Multiplexer,\" *IEEE
    International Symposium on Information Theory*, Santa Monica, CA,
    February 1981.

2.  J.G. Shanthikumar, P. K. Varshney, and K. Sriram, \"Priority Cut-off
    Flow Control Scheme for Integrated Voice/Data Multiplexers,\"
    *ACM-Sigmetrics Performance Evaluation Review*, vol. 11, no. 3, pp.
    8-14, Fall 1982.

3.  K. Sriram, P. K. Varshney, and J. G. Shanthikumar, \"Discrete-Time
    Analysis of Integrated Voice-Data Multiplexers with and without
    Speech Activity Detectors,\" *Proceedings of the IEEE GLOBECOM*,
    vol. 1, pp. B2.2.1-5, Miami, Dec., 1982; also in the *IEEE Journal
    on Selected Areas in Communications:* Special issue on Packet
    Switched Voice and Data Communications, pp. 1124-1132, December
    1983.

4.  K. Sriram, P. K. Varshney, and J. G. Shanthikumar, \"Buffered
    Digital Speech Interpolation with Fixed Delay," Proceedings *of the
    IEEE ICC*, Boston, vol. 2, pp. D6.2.1-5, June 1983.

5.  K. Sriram and P.K. Varshney, \"Performance Evaluation of Integrated
    Voice/Data Multiplexers,\" *Proc. of the International Conference on
    Computers, Systems and Signal Processing*, Bangalore, India,
    December 9-12,1984.

6.  K. Sriram and W. Whitt, \"Characterizing Superposition Arrival
    Processes in Packet Multiplexers for Voice and Data,\" *IEEE Journal
    on Selected Areas in Commun*., vol. SAC-4, no. 6, pp. 833-846,
    September 1986.

7.  K. Sriram and D. M. Lucantoni, \"Traffic Smoothing Effects of Bit
    Dropping in A Packet Voice Multiplexer,\" *Proc. of the IEEE
    INFOCOM*, New Orleans, March 1988, pp. 759-770. Also in the *IEEE
    Trans. on Commun.*, pp. 703-712, July 1989.

8.  H. Heffes, D.M. Lucantoni, K. Sriram, and W. Whitt,
    "Characterization of Packetized Voice Traffic and Related
    Statistical Multiplexer Performance." *Proceedings of AT&T Symposium
    on Performance Analysis*, May 1985, 12 pp.

9.  V.R. Karanam, K. Sriram, and D. O. Bowker, \"Performance Evaluation
    of Variable Bit Rate Voice in Packet Networks, \"*AT&T Technical
    Journal:* Special issue on Performance Modeling and Analysis, pp.
    41-56, September-October 1988. Also in part in the *Proc. of the
    IEEE GLOBECOM*, Hollywood, Florida, November 1988, pp. 1617-1622.

10. S. Dravida and K. Sriram, \"End-to-End Performance Models for
    Variable Bit Rate Voice over Tandem Links in Packet Networks,\"
    *Proc. of the IEEE INFOCOM*, Ottawa, Canada, April 1989, pp.
    1089-1097. Also in the *IEEE Journal on Selected Areas in
    Communications:* Special issue on Packet Speech and Video, pp.
    718-728, June 1989.

11. K. Sriram, \"Dynamic Bandwidth Allocation and Congestion Control
    Schemes for Voice and Data Multiplexing in Wideband Packet
    Technology,\" *Proc. of the IEEE ICC*, Atlanta, Georgia, April 1990,
    vol. 3, pp. 1003-1009.

12. K. Sriram, M.A. Gonzalo, D.O. Bowker, and A.U. Mac Rae, \"An
    Integrated Access Terminal for Wideband Packet Networking: Design
    and Performance Overview,\" *Proc. of the International Switching
    Symp.*, Stockholm, Sweden, May 1990, vol. 6, pp. 17-24.

13. K. Sriram, R.S. McKinney, and M.H. Sherif, \"Voice Packetization and
    Compression in Broadband ATM Networks,\" *Proc. of the ITC Seminar*,
    Morristown, New Jersey, October 1990, and in the *IEEE J. Selected
    Areas in Commun*., April 1991.

14. K. Sriram, \"Wideband Packet Technology: Performance and Modeling,\"
    *Proceedings of the ITC Specialists\' Seminar*, Cracow, Poland,
    April 22-27, 1991 (invited survey paper and keynote presentation).

15. K. Sriram, V.B. Mendiratta, and C.A. LaPadula, \"Performance
    Modeling of the Ethernet LAN and Its Applications in Internal
    Operations in a Telecommunications Switch,\" presented at the
    *ORSA/TIMS Conference*, Orlando, Florida, April 1992.

16. K. Sriram, \"Methodologies for bandwidth allocation, transmission
    scheduling, and congestion avoidance in broadband ATM networks,\"
    *Proc. of the IEEE GLOBECOM*, Orlando, December 1992, pp. 1545-1551
    (in part). Full paper in the *Computer Networks and ISDN Systems
    Journal*, special issue on \"Traffic Issues in ATM Networks\", pp.
    43-59, Vol. 26, September 1993.

17. K. Sriram, C. Li, P. Magill, N.A. Whitaker, J.E. Dail, M.A. Dajer,
    C.A. Siller, Jr., "An Adaptive MAC-Layer Protocol for Multi-Service
    Digital Access via Tree and Branch Communication Networks," *SPIE
    Proceedings:* *Hybrid Fiber-Coax Systems*, vol. 2609, pp. 10-21,
    October 1995.

18. J.E. Dail, M.A. Dajer, C. Li, P. Magill, C.A. Siller, K. Sriram, and
    N.A. Whitaker, \"Adaptive Digital Access Protocol (ADAPt): A MAC
    Protocol for Multi-Service Broadband Access Networks,\" IEEE 802.14
    LAN/MAN Committee, Contribution \# IEEE 802.14-95/142, November 6,
    1995.

19. J.E. Dail, C. Li, P. Magill, C.A. Siller, and K. Sriram, "ADAPt PDU
    and MAC/PHY Services in Support of ATM,\" IEEE 802.14 LAN/MAN
    Committee, Contribution \# IEEE 802.14-95/168, November 6, 1995.

20. K. Sriram, "Comparison of a Residential Community Network Using the
    ADAPt Protocol with Ethernet LAN in the Office Environment," IEEE
    802.14 LAN/MAN Committee, Contribution \# IEEE 802.14-96/020,
    January 22, 1996.

21. J.E. Dail, M.A. Dajer, C.-C. Li, P.D. Magill, C.A. Siller, Jr., K.
    Sriram, and N.A. Whitaker, "Adaptive Digital Access Protocol: A MAC
    Protocol for Multiservice Broadband Access Networks," *IEEE
    Communications Magazine*, pp. 104-112, March 1996.

22. K. Sriram, B.T. Doshi, P.D. Magill, and C.A. Siller, Jr., "Adaptive
    Digital Access Protocol (ADAPt): Performance and Capacity Modeling
    Results Based on Phase 2 Criteria," IEEE 802.14 LAN/MAN Committee,
    Contribution \# IEEE 802.14-96/121, May 1, 1996.

23. K. Sriram and P.D. Magill, "HFC MAC Protocols with Dynamically
    Variable vs. Fixed Number of Request Mini-Slots: Performance and
    Capacity Comparisons," IEEE 802.14 LAN/MAN Committee, Contribution
    \# IEEE 802.14-96/120, May 1, 1996.

24. K. Sriram, B.T. Doshi, S. Dravida, P.D. Magill, and C. A. Siller,
    Jr., "Possible Methods of Supporting Multiple Types of Traffic in
    the Downstream, and Related Performance Comparisons," IEEE 802.14
    LAN/MAN Committee, Contribution \# IEEE 802.14-96/184, July 8, 1996.

25. K.A. Cone, B.T. Doshi, S. Dravida, P.D. Magill, M. Murdocca, C.A.
    Siller, Jr., and K. Sriram, "Downstream FEC Considerations and
    Proposed Architectural Principles," IEEE 802.14 LAN/MAN Committee,
    Contribution \# IEEE 802.14-96/218, September 17, 1996.

26. K.A. Cone, B.T. Doshi, S. Dravida, P.D. Magill, M. Murdocca, C.A.
    Siller, Jr., and K. Sriram, "FEC At Physical Layer," IEEE 802.14
    LAN/MAN Committee, Contribution \# IEEE 802.14-96/219, September 17,
    1996.

27. B.T. Doshi, S. Dravida, P.D. Magill, M. Murdocca, C.A. Siller, Jr.,
    and K. Sriram, "A Proposal for Downstream Frame Structure and Frame
    Duration," IEEE 802.14 LAN/MAN Committee, Contribution \# IEEE
    802.14-96/220, September 17, 1996.

28. B.T. Doshi, S. Dravida, P.D. Magill, M. Murdocca, C.A. Siller, Jr.,
    and K. Sriram, "Advantages and Methods of Supporting Variable Length
    PDUs in Upstream and Downstream HFC Channels," IEEE 802.14 LAN/MAN
    Committee, Contribution \# IEEE 802.14-96/221, September 17, 1996.

29. B.T. Doshi, S. Dravida, P.D. Magill, C.A. Siller, Jr., and K.
    Sriram, "A Broadband Multiple Access Protocol for STM, ATM, and
    Variable Length Data Services on Hybrid Fiber-Coax Networks," IEEE
    802.14 LAN/MAN Committee, Contribution \# IEEE 802.14-96/222,
    September 17, 1996.

30. B.T. Doshi, S. Dravida, P.D. Magill, and C.A. Siller, Jr., and K.
    Sriram, "A Broadband Multiple Access Protocol for STM, ATM, and
    Variable Length Data Services on Hybrid Fiber-Coax Networks," *Bell
    Labs Technical Journal*, Volume 1, Number 1, Summer 1996, pp. 36-65.

31. K. Sriram and P.D. Magill, "Enhanced Throughput Efficiency by Use of
    Dynamically Variable Request Mini-Slots in MAC Protocols for HFC and
    Wireless Access Networks," *Telecommunications Systems* Vol. 9, Nos.
    3,4, pp. 315-333 (1998).

32. K. Sriram, "Performance of MAC Protocols for Broadband HFC and
    Wireless Access Networks," *Advances in Performance Analysis,* vol.
    1, no. 1, pp. 1-37, March 1998.

33. B.T. Doshi, S. Dravida, E. Hernandez-Valencia, K. Sriram, J.
    Anderson, and J. Manchester, "Multi-protocol Over a Bytestream
    (MOB): A New Protocol Stack for Supporting Heterogeneous Traffic
    Over a Common Link," Proc. of the *Networld+Interop Engineers
    Conference* '*98*, Las Vegas, Nevada, May 1998.

34. K. Sriram, "Performance of ATM and Variable Length Packet Access in
    Broadband HFC and Wireless Networks," *Proc. of the IEEE ICUPC*,
    Vol. 1, pp. 495-501, Florence, Italy, October 5-9, 1998.

35. K. Sriram, T.G. Lyons, and Y.T. Wang, "Use of Sequence Numbers and
    Mitigation of Anomalies Due to Delay and Loss in AAL2 Packet Voice
    Systems," ATM Forum Contribution \# 97_0776, Distributed to VTOA
    Committee, ATM Forum Meeting, Paris, France, September 22-26, 1997.
    Also presented in part at the *INFORMS Telecommun. Conf.,* Boca
    Raton, FL, March 8-11, 1997.

36. B.T. Doshi, E. Hernandez-Valencia, K. Sriram, Y.T. Wang and O. Yue,
    "Protocols, Performance and Controls for Voice over Wide Area Packet
    Networks," *Bell Labs Tech. J.*, Vol. 3, No. 4,
    October‑December 1998, pp. 297-337. (This is a complete paper
    related to the U.S. Patent No. 6,529,499, recognized by the MIT
    Technology Review Magazine as one of five 'Killer Patents" of 2003.)

37. K. Sriram, T. G. Lyons, and Y. T. Wang, "Anomalies Due to Delay and
    Loss in AAL2 Packet Voice Systems: Performance Models and Methods of
    Mitigation," *IEEE J. on Selected Areas in Commun*., special issue
    on Future Voice Technologies, Vol. 17, No. 1, pp. 4-17,
    January 1999.

38. K. Sriram and Y. T. Wang, "Voice Over ATM Using AAL2 and Bit
    Dropping: Performance and Call Admission Control," *IEEE J. on
    Selected. Areas in Commun.*, special issue on Future Voice
    Technologies, Vol. 17, No. 1, pp. 18-28, Jan. 1999.

39. K. Sriram, B. Samadi, S. Park, B. Desai, and T. Garry, "Economic
    Studies of Network Technologies for Wireless Access Network,"
    Proceedings of the Networks 2000, Toronto, Canada, September 10-14,
    2000.

40. K. Sriram, D. Griffith, S. Lee, and N. Golmie, "Backup Resource
    Pooling in (M:N)\^n Fault Recovery Schemes in GMPLS Optical
    Networks," in *Proceedings of SPIE Vol. 5285 OptiComm 2003: Optical
    Networking and Communications*, October 2003, pp. 185-196.

41. K. Sriram, D. Griffith, S. Lee, and N. Golmie, "Optical Burst
    Switching: Benefits and Challenges," the *Proc. of the First
    International Workshop on OBS* (WOBS 2003), Dallas, TX, October
    2003.

42. D. Griffith, R. Rouil, S. Klink, and K. Sriram, "An Analysis of Path
    Recovery Schemes in GMPLS Optical Networks with Various Levels of
    Pre-Provisioning," in *Proceedings of SPIE Vol. 5285 OptiComm 2003:
    Optical Networking and Communications*, October 2003, pp. 197-208.

43. S. Lee, K. Sriram, H. Kim, and J. Song, "Contention-Based Limited
    Deflection Routing in OBS Networks," the *Proc. of the IEEE
    Globecom* 2003, San Francisco, December 2003.

44. S.K. Lee, K. Sriram, H.S. Kim, and J.S. Song, \"Performance
    Improvement of Deflection Routing in Optical Burst Switching\",
    *Proc. of the ICCS* (International Conference on Computational
    Science), Melbourne, Victoria, Australia, June 2-4, 2003.

45. D. Griffith, K. Sriram, S. Lee, and N. Golmie, "Restorability versus
    Efficiency in (1:1)^n^ Protection Schemes for Optical Networks,"
    *Proc. of the IEEE ICC 2004*, Paris, June 2004.

46. K. Sriram, D. Griffith, R. Su, and N. Golmie,"Static vs. dynamic
    regenerator assignment in optical switches: Models and cost
    trade-offs," *Proceedings of the IEEE Workshop on High Performance
    Switching and Routing (HPSR 2004)*, April 2004, Phoenix, AZ, pp.
    151-155.

47. D. Griffith, K. Sriram, S. Klink, and N. Golmie, [\"Optimal Mixtures
    of Different Types of Recovery Schemes in Optical
    Networks,\"](http://www.antd.nist.gov/pubs/paper1.pdf) *Proc. of
    Broadband Networks 2004 - Broadband Optical Networking Symposium*.

48. D. Griffith, K. Sriram, L. Krivulina, and N. Golmie, [\"Resource
    Planning and Bandwidth Allocation in Hybrid Fiber-Coax Residential
    Networks,\"](http://w3.antd.nist.gov/pubs/osn_14.pdf) *Optical
    Switching and Networking*, August 2005.

49. D. Griffith, K. Sriram, and N. Golmie, [\"Protection Switching for
    Optical Bursts Using Segmentation and Deflection
    Routing,\"](http://w3.antd.nist.gov/pubs/ieee_comm_letters.pdf)
    *IEEE Communications Letters*, August 2005.

50. D. Griffith, K. Sriram, J.S. Gao, and N. Golmie, \"Wireless
    Enhancements for Storage Area Networks,\" *Proceedings of the IEEE
    Broadnets* 2005: Optical Networking Symposium, Boston, October 3-7,
    2005.

51. K. Sriram, D. Griffith, O. Borchert, G. DiLorenzo, R. Su, and N.
    Golmie, [\"Performance Comparison of Agile Optical Network
    Architectures with Static Vs. Dynamic Regenerator
    Assignment,\"](http://w3.antd.nist.gov/pubs/broadnets_006_2005.pdf)
    *Proceedings of the IEEE Broadnets* 2005: Optical Networking
    Symposium, Boston, October 3-7, 2005, pp. 55-64.
    [PDF](../broadnets_006_2005.pdf)

52. S. Lee, K. Sriram, H.S. Kim, and J.S. Song, "Contention-Based
    Limited Deflection Routing Protocol in Optical Burst-Switched
    Networks," *IEEE J. Selected Areas in Commun*., special issue on
    Optical Communication and Networking, Vol. 23, No. 8, August 2005,
    pp 1596-1611. [PDF](../obs_cldr_jsac_Aug2005.pdf)

53. D.R. Kuhn, K. Sriram, and D. Montgomery, "Border Gateway Protocol
    Security," NIST Special Publication 800-54 (Guidance Document for
    the Telecom Industry and US Government agencies), Issued July 2007.
    <http://csrc.nist.gov/publications/nistpubs/800-54/SP800-54.pdf>

54. K. Sriram, D. Montgomery, O. Borchert, O. Kim, and D. R. Kuhn,
    "Study of BGP Peering Session Attacks and Their Impacts on Routing
    Performance," *IEEE Journal on Selected Areas in Communications*:
    Special issue on High-Speed Network Security, Vol. 24, No. 10,
    October 2006, pp. 1901-1915.
    [PDF](../BGP_Security_Sriram_IEEE_JSAC.pdf)

55. S.K. Lee, K. Sriram, K. Kim, J.H. Lee, Y.H. Kim, and N. Golmie,
    "Vertical Handoff Decision Algorithms for Providing Optimized
    Performance in Heterogeneous Wireless Networks," Proc. of the IEEE
    Globecom 2007, Washington D.C., November 2007 (to appear). Also
    submitted to the IEEE Trans. on Vehicular Technology.
    <http://www.antd.nist.gov/~ksriram/vho_algorithm.pdf>

56. Kotikalapudi Sriram, Doug Montgomery, Rick Kuhn, W.E. Burr, and Alan
    Mink, "Measurement Science and Architecture Evaluation Methodologies
    for Security Driven Internet Architectures and Protocols,"
    Proceeding of the DARPA workshop on Assurable Global Networking,
    February 22-23, 2007, Arlington, VA.
    <http://csc-ballston.dmeid.org/darpa/meetings/presentations/jQfxH8aC/NIST.pdf>