UNITED STATES PATENT AND TRADEMARK OFFICE
`_____________________
`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`_____________________
`
`APPLE INC.
`Petitioner
`
`v.
`
`DSS TECHNOLOGY MANAGEMENT, INC.
`Patent Owner
`
`_____________________
`
`Case IPR2015-00373
`Patent 6,128,290
`_____________________
`
`DECLARATION OF DR. JING HU
`
`
`
`
`
`APL 1014
`IPR2015-00373
`
`
`
`_____________________
`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`_____________________
`
`APPLE INC.
`Petitioner
`
`v.
`
`DSS TECHNOLOGY MANAGEMENT, INC.
`Patent Owner
`
`_____________________
`
`Case IPR2015-00373
`Patent 6,128,290
`_____________________
`
`DECLARATION OF DR. JING HU
`
`
`
`
`
`APL 1014
`IPR2015-00373
`
`
`
`
`
`
`TABLE OF CONTENTS
`
`IPR2015-00373
`U.S. Pat. No. 6,128,290
`
`I.
`II.
`III.
`IV.
`V.
`VI.
`
`Introduction ................................................................................................... 1
`My Background and Qualifications .............................................................. 2
`List of Documents Considered in Formulating My Opinions....................... 4
`Legal Principles ............................................................................................. 6
`Person of Ordinary Skill in the Art ............................................................... 9
`State of the Art and Summary of References ................................................ 9
`A. Natarajan..............................................................................................10
`B. Neve .....................................................................................................15
`VII. Claims 9 and 10 would have been obvious to a POSA over Natarajan
`in view of Neve. .......................................................................................... 17
`VIII. HDLC is consistent with low duty cycle RF burst communications. ......... 20
`A. The preferred embodiment disclosed in the ’290 patent uses
`HDLC. .................................................................................................20
`B. Mr. Dezmelyk’s understanding of HDLC is incorrect. .......................21
`C. Natarajan and the HDLC protocol do not use “idle words.” ..............33
`IX. DSS’s interpretation of “low duty cycle” is incorrect. ................................ 36
`X.
`Conclusion ................................................................................................... 42
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`U.S. Pat. No. 6,128,290
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`I, Dr. Jing Hu, hereby declare as follows:
`
`I.
`
`Introduction
`
`1.
`
`I am over the age of eighteen (18) and otherwise competent to make
`
`this declaration.
`
`2.
`
`I have been retained as an expert witness on behalf of APPLE INC. for
`
`the above-captioned inter partes review (IPR). I am being compensated for my
`
`time in connection with this IPR at my standard legal consulting rate, which is
`
`$250 per hour.
`
`3.
`
`I understand that this inter partes review involves U.S. Patent No.
`
`6,128,290 (“the ’290 patent”), APL 1001, which issued from U.S. Patent
`
`Application No. 08/949,999 (“the ’999 application”), filed on October 14, 1997.
`
`The ’290 patent names Phillip P. Carvey as the sole inventor. The ’290 patent
`
`issued on October 3, 2000, from the ’999 application. It is my understanding that
`
`the ’290 patent is currently owned by DSS Technology Management, Inc.
`
`4.
`
`In preparing this Declaration, I have reviewed the ’290 patent and
`
`considered each of the documents cited herein in light of the general knowledge in
`
`the art at the time of the alleged inventions. In formulating my opinions, I have
`
`relied upon my experience, education, and knowledge in the relevant art(s). I have
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`also considered the viewpoint of a person of ordinary skill in the art (“POSA”) at
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`the relevant time period.
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`IPR2015-00373
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`II.
`
`My Background and Qualifications
`
`5.
`
`I hold a doctoral degree (PhD) in Electrical and Computer
`
`Engineering, granted by University of California, Santa Barbara in 2007, as well as
`
`a Master’s degree in Electrical and Computer Engineering from Rice University in
`
`2003, and a Bachelor’s degree in Precision Instruments from Tsinghua University,
`
`Beijing, China in 2001.
`
`6.
`
`I worked as a research scientist and embedded software engineer at
`
`Cisco Systems, Inc. between the years of 2007 and 2012. At Cisco Systems, I
`
`worked on a series of projects that included wide area network optimization, video
`
`quality monitoring, and multimedia conferencing systems on digital signal
`
`processing parts of enterprise network routers. I designed algorithms, wrote
`
`production source code and conducted unit testing on these projects.
`
`7.
`
`I have conducted research in both academia and industry for over ten
`
`years. My research topics include wireless network optimization, information
`
`theory, video compression, and communication over wireless networks. I have
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`published numerous peer-reviewed research papers on these topics. My research
`
`paper “Video capacity of Wireless LANs with a multiuser perceptual quality
`
`constraint” won Best Paper Award of IEEE Transactions on Multimedia over the
`
`years of 2007 to 2009. Please see my Curriculum Vitae (CV) for the list of my
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`other published research papers. I have been a visiting researcher at University of
`
`
`
`California, Santa Barbara since early 2013.
`
`8.
`
`I am an inventor of four awarded or pending U.S. patents, on topics
`
`ranging from wide area network optimization to video quality monitoring in the
`
`network and in the endpoints. Please see my CV for the list of my patents and
`
`patent applications.
`
`9.
`
`I have co-authored a book titled “Rate Distortion Bounds for Voice
`
`and Video,” published
`
`in
`
`the prestigious Foundations and Trends
`
`in
`
`Communications and Information Theory Series, in February 2014. In this book,
`
`my co-author and I teach the current best-performing voice and video codecs for
`
`communication over wired, wireless, and cellular networks and present the first
`
`rate distortion bounds for voice and video that lower bound the operational rate
`
`distortion performance of these codecs.
`
`10.
`
`In the course of my research and product development related to data
`
`communication over wireless and wired networks, I worked extensively with
`
`communication protocols across various layers of the networks, including, for
`
`example, IEEE 802.11, Asynchronous Transfer Mode (ATM), Ethernet, and High-
`
`Level Data Link Control (HDLC) on the data link layer. I have both designed data
`
`communication algorithms and developed relevant products that function over
`
`and/or interoperate with the networks governed by these protocols.
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`I have been engaged as an expert consultant in many technology-
`
`
`
`11.
`
`based matters for the past three years, with a focus on patent infringement and
`
`patent portfolio evaluation. My cases have covered diverse areas such as Bluetooth
`
`technologies, cellular networks, smart handheld devices, banking and security
`
`related software, video compression related software, and television systems.
`
`12. Additional information concerning my qualifications are set forth in
`
`my current CV, a copy of which is attached hereto as Exhibit APL 1015.
`
`III.
`
`List of Documents Considered in Formulating My Opinions
`
`13.
`
`In formulating my opinions, I have considered
`
`the following
`
`documents and any other documents cited herein:
`
`Exhibit /
`Paper #
`
`2
`
`8
`
`Description
`
`Apple’s Petition for Inter Partes Review of U.S Patent No.
`6,128,290
`
`Institution Decision by Patent Trial and Appeal Board
`
`15
`Patent Owner DSS Technology, Inc.’s Response to Petition
`APL 1001 Carvey, U.S. Patent No. 6,128,290, “Personal Data Network,” (filed
`October 14, 1997; issued October 3, 2000) (“the ’290 patent”).
`
`APL 1003
`
`Natarajan et al., U.S. Patent No. 5,241,542, “Battery Efficient
`Operation of Scheduled Access Protocol,” (filed August 23, 1991;
`issued August 31, 1993) (“Natarajan”).
`APL 1004 Neve et al., U.S. Patent No. 4,887,266, “Communication System,”
`(filed April 29, 1986; issued December 12, 1989) (“Neve”).
`
`APL 1005 File history of U.S. Patent No. 6,128,290
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`Description
`
`Exhibit /
`Paper #
`APL 1006 Application No. 08/611,695 (as-filed)
`APL 1007 Apple’s Claim Construction Brief in Case No. 6:13-cv-00919-JDL
`(EDTX)
`APL 1011 Deposition Transcript of Robert Dezmelyk, IPR2015-00369 and
`IPR2015-00373, December 15, 2015 (“Dezmelyk Depo.”)
`APL 1012 Mischa Schwartz, Telecommunications Networks: Protocols,
`Modeling and Analysis, Addison-Wesley, 1988 (“Schwartz”)
`APL 1013 Tom Sheldon, Encyclopedia of Networking & Telecommunications,
`Lisa Wolters-Broder ed., McGraw Hill, 2001 (other excerpts
`submitted as DSS 2010)
`DSS 2001 U.S. Patent No. 5,699,357
`DSS 2002 Definition of “e.g.,” Black’s Law Dictionary (9th ed. 2009)
`DSS 2003 Myk Dormer, Low Duty Cycle?, Electronics World Magazine, Dec.
`2008, available at
`http://www.radiometrix.com/files/additional/Low-
`Duty-Cycle.pdf
`DSS 2004 U.S. Pat. No. 7,558,232
`DSS 2005 U.S. Pat. No. 7,092,762
`DSS 2006 U.S. Pat. No. 7,049,620
`DSS 2007 U.S. Pat. No. 8,837,653
`DSS 2008 U.S. Pat. No. 8,727,561
`DSS 2009 Definition of “burst,” Chambers Dictionary of Science and
`Technology (1st ed. 1999)
`DSS 2010 Tom Sheldon, Encyclopedia of Networking & telecommunications,
`549, (Lisa Wolters-Broder ed., McGraw Hill 2001)
`DSS 2011 U.S. Pat. No. 3,598,914
`DSS 2012 U.S. Pat. No. 6,983,031
`DSS 2013 Yurcik, William J., Serial and Parallel Transmission. Computer
`Sciences. 2002. Encyclopedia.com, available at
`http://www.encyclopedia.com
`DSS 2014 Asynchronous HDLC MC68360 ASYNC HDLC Protocol Microcode
`User’s Manual, 8, (Freescale Semiconductor, Inc. 1996)
`
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`Exhibit /
`Paper #
`DSS 2016 Declaration of Mr. Robert Dezmelyk
`DSS 2017 Wmat Auppu, AIF Inter DSP Communication, 1, available at
`http://processors.wiki.ti.com/index.php/AIF_Inter_DSP_Communic
`ation
`
`Description
`
`
`IV.
`
`Legal Principles
`I understand that, during an inter partes review, claims are to be given
`
`14.
`
`their broadest reasonable construction in light of the specification as would be
`
`understood by a person of ordinary skill in the relevant art.
`
`15.
`
`I understand that to determine how a person of ordinary skill would
`
`understand a claim term, one should look to those sources available that show what
`
`a person of skill in the art would have understood disputed claim language to
`
`mean. Such sources include the words of the claims themselves, the remainder of
`
`the patent’s specification, the prosecution history of the patent (all considered
`
`“intrinsic” evidence), and “extrinsic” evidence concerning relevant scientific
`
`principles, the meaning of technical terms, and the state of the art.
`
`16.
`
`I understand that words or terms should be given their ordinary and
`
`accepted meaning unless it appears that the inventors were using them to mean
`
`something else. I understand that a person of ordinary skill in the art is deemed to
`
`read a claim term not only in the context of the particular claim in which the
`
`disputed term appears, but in the context of the entire patent, including the
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`specification. For this reason, the words of the claim must be interpreted in view of
`
`
`
`the entire specification. Put another way, claim terms are given their broadest
`
`reasonable interpretation that is consistent with the specification and the
`
`prosecution history.
`
`17.
`
`In addition to consulting the specification, one should also consider
`
`the patent’s prosecution history. The prosecution history provides evidence of how
`
`both the Patent Office and the inventor(s) understood the terms of the patent,
`
`particularly in light of what was known in the prior art. Furthermore, where the
`
`specification describes a claim term broadly, arguments and amendments made
`
`during prosecution may require a more narrow interpretation.
`
`18.
`
`I understand that while intrinsic evidence is of primary importance,
`
`extrinsic evidence, e.g., all evidence external to the patent and prosecution history,
`
`including expert and inventor testimony, dictionaries, and learned treatises, can
`
`also be considered. For example, technical dictionaries may help one better
`
`understand the underlying technology and the way in which one of skill in the art
`
`might use the claim terms. Extrinsic evidence should not be considered, however,
`
`divorced from the context of the intrinsic evidence.
`
`19.
`
`I understand that an obviousness analysis involves comparing a claim
`
`to the prior art to determine whether the claimed invention would have been
`
`obvious to a person of ordinary skill in the art in view of the prior art, and in light
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`of the general knowledge in the art. I also understand when a person of ordinary
`
`
`
`skill in the art would have reached the claimed invention through routine
`
`experimentation, the invention may be deemed obvious.
`
`20.
`
`I also understand that obviousness can be established by combining or
`
`modifying the teachings of the prior art to achieve the claimed invention. It is also
`
`my understanding that where there is a reason to modify or combine the prior art to
`
`arrive at the claimed invention, there must also be a reasonable expectation of
`
`success in so doing. I understand that the reason to combine prior art references
`
`can come from a variety of sources, not just the prior art itself or the specific
`
`problem the patentee was trying to solve. And I understand that the references
`
`themselves need not provide a specific hint or suggestion of the alteration needed
`
`to arrive at the claimed invention; the analysis may include recourse to logic,
`
`judgment, and common sense available to a person of ordinary skill that does not
`
`necessarily require explanation in any reference.
`
`21.
`
`I understand that when considering the obviousness of an invention,
`
`one should also consider whether there are any secondary considerations that
`
`support the nonobviousness of the invention. I understand that secondary
`
`considerations of nonobviousness include failure of others, copying, unexpectedly
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`superior results, perception in the industry, commercial success, and a long-felt but
`
`unmet need.
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`V.
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`Person of Ordinary Skill in the Art
`
`22.
`
`I understand that a person of ordinary skill in the art (“POSA”) is one
`
`who is presumed to be aware of pertinent art, thinks along conventional wisdom in
`
`the art, and is a person of ordinary creativity. In my opinion, a person of ordinary
`
`skill in the art at the time of the priority date of the ’290 patent would be a person
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`with an undergraduate degree in Electrical Engineering and 1-2 years of experience
`
`working with wireless network technology, or equivalent education and/or work
`
`experience. I am familiar with what a POSA would have known at the time of the
`
`priority date of the ’290 patent.
`
`VI.
`
`State of the Art and Summary of References
`
`23.
`
`In my opinion, the references asserted against the ’290 patent claims
`
`and discussed herein clearly show that the features recited in the ’290 patent claims
`
`were well known in the prior art. To the extent that a particular feature is not
`
`explicitly described in one of the asserted references, it is my opinion that these
`
`features would have been obvious to a POSA.
`
`24. Many of the claimed limitations are simply well known components
`
`of wireless communication systems performing their standard functions. For
`
`example, the claims recite basic features such as a “server microcomputer unit”
`
`communicating with multiple “peripheral units,” where these components each
`
`have a transmitter and receiver. Energizing the transmitters and receivers only
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`during designated transmission slots was also well known. So too was
`
`
`
`synchronizing devices so that they could rely on timed communication plans.
`
`25.
`
`It is my opinion that the ’290 patent claims merely recite a collection
`
`of well known components performing their standard function according to well
`
`known techniques. In my opinion, the ’290 patent claims do not recite any features
`
`that were not previously known in the art or would not have been obvious to a
`
`POSA.
`
`26.
`
`It is my understanding from reviewing DSS’s Patent Owner Response
`
`to Petition that DSS only contends that one feature–the server transmitter being
`
`“energized in low duty cycle RF bursts”–is not taught or suggested by the
`
`combination of prior art references. Therefore, my opinions and analysis herein
`
`focus on this claim element.
`
`27. Exemplary relevant art that was published before October 14, 1997
`
`includes the references described below.
`
`A. Natarajan
`28. Natarajan is directed to battery power conservation in wireless
`
`communications of mobile computers controlled by multi-access protocols.
`
`(Natarajan, 1:6-12.) Figure 1 shows that multiple mobile units (10, 12, 14, 16)
`
`communicate with base stations (26, 28) via wireless radio links. (Natarajan, 2:28-
`
`39, Figure 1.) Natarajan describes that the base stations can be a “conventional
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`microcomputer” and that the mobile units can be a “hand held or laptop computer.”
`
`
`
`(Natarajan, 2:40-41, 2:58-59.) Both the base stations and mobile units have an RF
`
`transceiver for establishing a radio link. (Natarajan, 2:51-56, 2:65-67.) A system
`
`schematic common to both the base station and mobile stations is illustrated in
`
`FIG. 3. (Natarajan, 3:7-8.) Each device includes, for example, a microprocessor
`
`system (56) that controls the transceiver via an interface (58). (Natarajan, 3:14-15.)
`
`The microprocessor system also includes a dedicated microprocessor (62) with
`
`high-resolution time interval determination hardware or “timers.” (Natarajan, 3:18-
`
`21.)
`
`29. Natarajan describes that its system is intended “for minimizing battery
`
`power consumed by wireless link adapters at the mobile units.” To do so,
`
`Natarajan describes turning off the transmitter and receivers when not in use.
`
`(Natarajan, 4:2-5.) More specifically, Natarajan describes that:
`
`[s]cheduled access multiaccess protocols can be implemented to
`effectively conserve battery power by suitable control of the state of
`transmitter and receiver units at the portable units (i.e., by scheduling
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`when they should be turned ON or OFF). A desirable solution is one
`in which the transmitter (or receiver) consumes power only when it is
`actively transmitting a message (or actively receiving a message).
`(Natarajan, 3:59-4:6.)
`
`
`
`30. Natarajan further describes that the scheduled multiaccess protocol
`
`divides time into “fixed-length frames, and frames are divided into slots,” as
`
`shown, for example, in FIG. 4. (Natarajan, 4:20-23, FIG. 4.) The frames are
`
`divided into subframes where, for example with respect to FIG. 4, one subframe is
`
`for transmitting data packets from the base station to mobile units (Period A), a
`
`second subframe is for contention-free transmission from mobile units to the base
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`station (Period B), and a third subframe is for “bursty data traffic” in a contention
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`mode from mobile units to the base station (Period C). (Natarajan, 4:27-38.)
`
`
`
`31. Natarajan describes that in Period A, the base station controls the
`
`outbound transmissions to the mobile units. (Natarajan, 4:40-41.) Prior to Period
`
`A, the base station broadcasts a header (AH) to the mobile units that includes: a list
`
`of mobile units that will be receiving data packets from the base station, the order
`
`in which the mobile units will receive the data packets, and the number of data
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`packets that will be transmitted to each mobile unit. (Natarajan, 4:45-53.) If a
`
`
`
`mobile unit is not included in header (AH), it will not be receiving data from the
`
`base station, and can turn off its receiver for Period A. (Natarajan, 4:63-67.)
`
`Because the mobile units know the order and number of data packets to be
`
`transmitted, each mobile unit that will be receiving data can compute when its
`
`designated transmission slot will be, go to sleep until that time, and wake itself up
`
`in its designated time slot to receive data. (Natarajan, 4:67-5:4.) After receiving its
`
`data, the receiver can go back to sleep for the remainder of Period A. (Natarajan,
`
`5:4-6.)
`
`32. Natarajan similarly discloses broadcasting another header (BH) for
`
`scheduling which mobile units will be allowed to transmit to the base station and
`
`the order they will transmit. (Natarajan, 5:9-29.) Flow charts of these processes are
`
`shown, for example, in FIGS. 8A-8D and described in Natarajan at 8:14-9:54.
`
`Using this scheme, the mobile units save power by powering up only during their
`
`designated reception or transmission time slot.
`
`33. Natarajan also describes that header (AH) includes “a coded
`
`description of mobile users that will receive data in the current frame. That is, it is
`
`a designation of which mobile users are to communicate with the base station
`
`during this frame.” (Natarajan, 6:19-22.) Header (BH) similarly includes “a coded
`
`designation or description of mobile users that can transmit data in the current
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`frame.” (Natarajan, 6:31-33.) Natarajan describes assigning each mobile unit an
`
`
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`index number during a “registration period” which is “needed to associate each
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`mobile unit in the network with the intended base station.” (Natarajan, 6:48-54.)
`
`34. The header (AH) transmitted from the base station includes a
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`“Receiving Users designation or Index message portion” that is a bit-vector
`
`sequence with a bit for each of the registered mobile units. (Natarajan, 6:55-58.)
`
`FIG. 5 illustrates an example of this sequence.
`
`
`
`35.
`
` Natarajan specifically describes
`
`that
`
`the “coded description”
`
`designates whether or not each mobile unit will communicate with the base station
`
`during a particular time frame:
`
`The content of each bit location signals the receiver activity of the
`user designated or indexed by the bit location. For example, reading
`left to right, a “1” in the 4’th, 8’th, 9’th, etc. bit location can be used
`to signal that the 4’th, 8’th, 9’th, etc. mobile unit is designated to
`receive one message in the current frame period. “0” in the 1’st, 2’nd,
`3’rd, etc. bit location signals that the 1’th, 2’nd, 3’rd, etc. mobile unit
`is inactive (is not designated to receive any data) and can turn its
`receiver power OFF until the beginning of Header BH.
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`(Natarajan, 6:59-68.)
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`An analogous scheme is used in the header (BH) for transmission from the
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`mobile units to the base station. (Natarajan, 7:1-6.) This scheduled communication
`
`scheme reduces power consumption by requiring that the mobile units only be
`
`powered on during time slots where they will be receiving or transmitting data.
`
`(Natarajan, 7:6-15.)
`
`B. Neve
`36. Neve is directed to “[a] communication system able to provide
`
`multiple path communication between a plurality of stations operating on a single
`
`channel. The stations are synchronized and a cyclically repeating series of time
`
`slots is defined.” (Neve, Abstract.) In order to provide radio data communication,
`
`Neve discloses that each device includes “a transmitter and receiver device
`
`(transceiver) 2 which includes an antenna 3, a transmitter circuit 4 and a receiver
`
`circuit 5.” (Neve, 3:59-63.) The transceiver is connected to a digital control
`
`processor, which controls data transfer to and from the transmitter and receiver.
`
`(Neve, 3:64-68.)
`
`37. Neve describes that it is “desirable to provide a communications
`
`system in which the transmitting and receiving apparatus is small, may be easily
`
`installed in any location, and is of very low power consumption.” (Neve, 1:31-34.)
`
`Thus, Neve’s system “enables a very low power consumption to be achieved in the
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`cases where the device requires to transmit data only rarely or the receiver receives
`
`
`
`the predetermined code signal only rarely…a device may need to transmit data for
`
`only a fraction of a second in many hours.” (Neve, 2:25-31.)
`
`38. Neve describes that when data transfer is not taking place, the device
`
`can enter a lower power consumption state. (Neve, 2:13-16.) The system is
`
`designed “automatically to re-enter the data transfer condition when either a signal
`
`is received from the device indicative of the need to transmit data or a
`
`predetermined code signal is received by the receiver circuit indicative of the need
`
`to receive data.” (Neve, 2:19-24.) So, the receiver has very low power
`
`consumption because only the internal timing circuitry is energized continuously,
`
`whereas the rest of the receiving circuit is energized only when its assigned time
`
`slot occurs. (Neve, 2:39-41.) Similarly, the transmitter only needs to be energized
`
`when transmission is required. (Neve, 2:45-47.)
`
`39. The time slots include “at least one synchronisation time slot, at least
`
`one interrupt time slot, and a plurality of address or data time slots, wherein any
`
`other station can transmit a message to the master station during an interrupt time
`
`slot to indicate a request to communicate.” (Neve, 3:12-17.) Neve describes that
`
`the receiver circuit “includes a low power timing circuit which operates to energise
`
`the rest of the receiver circuit only for the time slot in which its address may occur
`
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`- 16 -
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`and for
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`the synchronisation
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`time slot
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`thereby enabling
`it
`to maintain
`
`synchronisation with low power consumption.” (Neve, 4:43-48.)
`
`40. Neve further describes that controlling the transceiver includes power
`
`up, cadence capture, bit synchronization, and a bit synchronization clock. (Neve,
`
`6:7-11.) The clock is always active and the fundamental frequency of the oscillator
`
`is used as the system clock for the CPU. (Neve, 6:11-14.)
`
`VII. Claims 9 and 10 would have been obvious to a POSA over Natarajan
`in view of Neve.
`
`41. Having reviewed claims 9 and 10 of the ’290 patent and the prior art
`
`of record, it is my opinion that each and every limitation of claims 9 and 10 is
`
`disclosed by Natarajan and/or Neve or would have been obvious to a POSA in
`
`view of the combination of Natarajan and Neve. Therefore, it is my opinion that
`
`claims 9 and 10 of the ’290 patent would have been obvious in view of Natarajan
`
`and Neve.
`
`42. Having reviewed Patent Owner DSS Technology Inc.’s Response to
`
`Petition, it appears that DSS’s only contention is that the combination of Natarajan
`
`and Neve does not teach or suggest a server transmitter “energized in low duty
`
`cycle RF bursts,” as recited in independent claim 9. It is my opinion that this
`
`feature is, in fact, taught by the combination of Natarajan and Neve. At the very
`
`least, should the Board find, wrongly in my opinion, that this feature is not
`
`
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`- 17 -
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`expressly taught by the prior art, this feature would have been obvious to a POSA
`
`
`
`in view of Natarajan and Neve.
`
`43. The general term “low duty cycle RF bursts” is not expressly defined
`
`in the ’290 patent. I agree with the Board’s position in the Institution Decision that,
`
`under the broadest reasonable interpretation of this term, Natarajan’s “scheduled
`
`multi-access protocol in which time is divided into fixed-length frames, along with
`
`Natarajan’s description of frames being divided into slots and multiple subframes”
`
`demonstrates that Natarajan discloses “said server and peripheral transmitters
`
`being energized in low duty cycle RF bursts.” (Institution Decision, pp. 16-17.)
`
`This is because, like the ’290 patent, Natarajan discloses that “[s]cheduled access
`
`multiaccess protocols can be implemented to effectively conserve battery power by
`
`suitable control of the state of transmitter and receiver units at the portable units
`
`(i.e., by scheduling when they should be turned ON or OFF)…the transmitter (or
`
`receiver) consumes power only when it is actively transmitting a message (or
`
`actively receiving a message).” (Natarajan, 3:59-4:6.) Under the broadest
`
`reasonable interpretation of this term, a POSA would consider a system operating
`
`in this manner to operate in “low duty cycle RF bursts.”
`
`44. DSS asserts that Natarajan only describes that the mobile units operate
`
`in the manner described above. (POR, p. 17.) However, it is my opinion that a
`
`POSA would have understood that the base station would have operated similarly,
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`
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`- 18 -
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`that is, when the base station is not transmitting, its transmitter is powered off. As
`
`
`
`described in Natarajan, “[m]ost users are very likely to be inactive (both Transmit-
`
`Inactive and Receive-Inactive) most of the time for most applications. This is
`
`primarily due to the bursty nature of data communication traffic.” (Natarajan, 6:41-
`
`44 (emphasis added).) Because most of the users are inactive most of the time, the
`
`base station will not have information to transmit most of the time. Therefore,
`
`when it is not transmitting, it will be powered off. Based on this description, a
`
`POSA would have understood Natarajan’s base station and mobile units operate in
`
`“low duty cycle RF bursts.”
`
`45. Furthermore, as described above, Natarajan explicitly discloses that
`
`the mobile unit transmitters operate in “low duty cycle RF bursts.” (Natarajan,
`
`3:59-4:6.) Therefore, it would have been obvious to a POSA to have the base
`
`station operate in an analogous manner. The RF systems of the base station and
`
`mobile stations in Natarajan have the same physical structure. (Natarajan, 3:7-8,
`
`FIG. 3.) A POSA applying the exact design disclosed in Natarajan to an
`
`application exactly as described in Natarajan where “[m]ost users are very likely to
`
`be
`
`inactive
`
`(both Transmit-Inactive and Receive-Inactive) most of
`
`the
`
`time,”(Natarajan, 6:41-44 (emphasis added)) would have conceived a system in
`
`which both the transmitter and the receiver of both the base station and the mobile
`
`stations operate in “low duty cycle RF bursts.” Therefore, it is my opinion that a
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`- 19 -
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`POSA would not have found the “low duty cycle RF bursts” recited in claim 9 of
`
`
`
`the ’290 patent to be novel.
`
`VIII. HDLC is consistent with low duty cycle RF burst communications.
`46. DSS asserts that the High-Level Data Link Control (HDLC) packet
`
`structure disclosed in Natarajan is inconsistent with a server transmitter being
`
`energized in low duty cycle RF bursts. (POR, pp. 20-23.) For the reasons below, it
`
`is my opinion that DSS’s position is wrong. To the contrary, HDLC is consistent
`
`with low duty cycle RF burst communications.
`
`A. The preferred embodiment disclosed in the ’290 patent uses HDLC.
`47. The preferred embodiment of the ’290 patent discloses using HDLC
`
`for communication between the PDA and PEAs. Therefore, if HDLC is not
`
`compatible with low duty cycle RF burst communications, then the preferred
`
`embodiment in the ’290 patent would not work.
`
`48. The basic scheme of the ’290 patent’s frame structure is “a form of
`
`time division multiple access (TDMA).” (’290 patent, 5:45-50.) The ’290 patent
`
`states that “[a]s will be understood by those skilled in the art, the TDMA system is
`
`greatly facilitated by the establishment of a common frame time base between PEA
`
`and PDA.” (’290 patent, 7:63-65.) I agree this was well-known in the art. The ’290
`
`patent describes that establishment of a common frame time base is accomplished
`
`using synchronization beacons (SBs). (’290 patent, 7:65-67.) Before receiving the
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`- 20 -
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`IPR2015-00373
`U.S. Pat. No. 6,128,290
`SBs, a PEA is associated with the PDA using a succession of Attachment Beacons
`
`
`
`(ABs), which are “composed of RF bursts having the same interval spacings as
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`Synchronization Beacons,” broadcast from the PDA to the PEAs. (’290 patent,
`
`9:13-16 (emphasis added), 9:66-10:2.) The ’290 patent states that “[t]his
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`succession of ABs forms an HDLC channel using bit-stuffing to delineate the
`
`beginning and end of a packet.” (’290 patent, 10:2-4 (emphasis added).)
`
`49.
`
`In view of this disclosure in the ’290 patent, a POSA would have
`
`understood that the preferred embodiment of the ’290 patent discloses using HDLC
`
`to
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