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`Marvell Semiconductor, Inc. - Ex. 1002, Page 0001
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`...-------------------~-'"'-----...JJ".lr4fD.5. ~~f'''~ J', ,' ,cJ, n fl LI. ~DD t)ntlh1
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`FORM PT0-1390 U.S. DEPARTMENT OF COMMERCE PATENT AND TRADEMARK
`OFFICE
`
`ATTORNEY'S DOCKET NO.
`PHDE000238
`
`TRANSMITTAL LETTER TO THE UNITED STATES DESIGNED/ELECTED OFFICE
`(00/EO/US) CONCERNING A FILING UNDER 35 U.S.C. 371
`
`INTERNATIONAL APPLICATION NO.
`PCT/EP01/09258
`
`INTERNATIONAL FILING DATE
`AUGUST 8, 2001
`
`PRIORITY DATE CLAIMED
`AUGUST 8, 2000
`
`TITLE OF INVENTION: METHOD, NETWORK AND CONTROL STATION FOR THE TWO•WAY ALTERNATE CONTROL OF RADIO SYSTEMS OF
`DEFFERENT STANDARDS IN THE SAME FREQUENCY BAND
`
`APPLICANT(S) FOR DO/EO/US BERNHARD WALKE; STEFAN MANGOLD
`
`Appllcant(s) herewith submit to the United States Designated/Elected Office (DO/EO/US) the following items and other Information:
`
`1. [X]
`
`2. [ ]
`
`3. [X J
`
`4. [ J
`
`5. ( ]
`
`6. [ J
`
`7. [ ]
`
`8. [ ]
`
`This ls a FIRST submission of Items concerning a filing under 35 U.S.C. 371.
`This is a SECOND or SUBSEQUENT submission of items concerning a filing under 35 u.s.c. 371.
`
`This express request to begin national examination procedures (35 U.S.C. 371(f)) at any time rather than delay
`examination until the expiration of the applicable time limit set In 35 U.S.C. 371 (bl and PCT Articles 22 and
`39(1).
`
`A proper Demand for International Preliminary Examination was made by the 19th month from the earliest claimed priority date.
`
`A copy of the International Application as filed (35 U.S.C. 371 (c)(2))
`a. [ ]
`Is transmitted herewith {required only If not transmitted by the International Bureau).
`has been transmitted by the International Bureau.
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`c. [ ]
`is not required, as the application was filed in the United States Receiving Office (RO/US).
`
`A translation of the International Application into English {35 U.S.C. 371(c)(2))
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`Amendments to the claims of the International Application under PCT Article 19 (35 U.S.C. 371(c)(3))
`a. [ ]
`are transmitted herewith {required only if not transmitted by the International Bureau).
`b. [ ]
`have been transmitted by the International Bureau.
`c. [ ]
`have not been made; however, the time limit for making such amendments has NOT expired.
`d. [ ]
`have not been made and will not be made.
`A translation of the amendment to the claims under PCT Article 19 (35 u.s.c. 371 (c)(3)).
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`9. [X]
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`An oath or declaration of the inventor(s) (35 U.S.C. 371(c)(4)).
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`10. ( ]
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`A translation of the annexes to the International Preliminary Examination Report under PCT Article 36 (35 U.S.C. 371{c){5)).
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`Items 11. to 16. below concern document(s) or information included:
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`An Information Disclosure Statement under 37 C.F.R.1.97 and 1.98.
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`13. [ 1
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`A FIRST preliminary amendment
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`A substitute specification.
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`Other Items or information:
`Application as published (WO 02/13457 A2)
`3 Sheets of Formal Drawings
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`CERTIFICATE OF EXPRESS MAILING
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`Edna Chapa
`Typed Name
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`S:\GRlmt03grg0.ec0.D0C
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`1 of2
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`U.S. APPLICilo 7 (onacf,is.F9. 1.5)
`
`17 [ X] The following fees are submitted:
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`BASIC NATIONAL FEE (37 C.F.R.1.492(A)(1)-(5)):
`
`I
`
`JC13 Rec'd PCT/PTO O 4 APR 2002
`
`INTERNATIONAL APPLICATION NO.
`PCT/EP01/09258
`
`ATTORNEY'S DOCKET NUMBER
`PHDE000238
`
`CALCULATIONS (PTO USE ONLY)
`
`Search Report has been prepared by the EPO or JPO
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`International preliminary-examination fee paid to USPTO
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`Neither international prelimina% examination f~37 C.F.R.
`1.482) nor international search e (37 C.F .R. 1.
`(a)(2))
`paid to USPTO
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`$970.00
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`International preliminary examination fee paid to USPTO
`f7 C.F.R. 1.482) and all claims satisfied provisions of PCT
`rticle 33(2)-(4)
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`ENTER APPROPRIATE BASIC FEE AMOUNT=
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`CLAIMS
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`Total Claims
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`Independent claims
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`NOTE, Wh.,. ,a opp-ot, Umo llmlt " ' " 37 C.F.R.1A94°' 1.495 hu ~ " =•, ~r (37 C.F.R. 1.137(a) o, {bl) m,st bo
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`filed and granted to restore the application to pending status.
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`SEND ALL CORRESPONDENCE TO:
`
`Corporate Patent Counsel
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`DATE OF MAILING:
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`
`S:IGR\nrr03grg0.ec0.D0C
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`2 of2
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`_ 0 I /,A,/()
`Russel Gross
`40 007
`(RE?;iSIRATION NUMBER)
`
`Marvell Semiconductor, Inc. - Ex. 1002, Page 0003
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`PHDE000238
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`101089959
`JC13 Rec'd PCT/PTO O 4 APR ?00?
`29.03.2002
`
`1
`
`Method, network and control station for the two-way alternate control of radio systems of
`
`different standards in the same frequency band
`
`The invention relates to a method of alternate control of radio systems of
`
`different standards in the same frequency band.
`
`A radio system for wireless transmission of information is allowed to use
`
`.5
`
`transmission power only in accordance with standards. The national regulation authority
`
`determines on what frequencies with what transmission power and in accordance with what
`
`radio interface standard a radio system is allowed to transmit. For this purpose there is
`
`provided for so-termed ISM frequency bands (Industrial Scientific Medical) that radio
`
`systems transmit in the same frequency band in accordance with different radio interface
`
`ljj
`
`standards. An example of this is the US radio system IEEE802.11 a and the European ETSI
`
`BRAN HiperLAN/2. The two radio systems transmit in the same frequency bands between
`
`5.5 GHz and 5.875 GHz with approximately the same radio transmission method, but
`
`different transmission protocols.
`
`In the event of interference, method were standardized for an active switching
`
`to another frequency within the permitted frequency band, for controlling transmission power
`
`and for the adaptive coding and modulation to reduce interference. Radio systems of
`
`wideband LANs of the radio interface standards ETSI BRAN HiperLAN/2 and IEEE802.1 la
`•
`utilize the same radio transmission method, a 64-carrier OFDM method and an adaptive
`modulation and coding. About the same modulation and coding methods (Link: Adaptation,
`
`20
`
`LA) are defined for the two standards.
`
`The Medium Access Control (MAC) of the two systems is totally different.
`
`ETSI BRAN HiperLAN/2 utilizes a centrally controlled reservation-based method in which a
`
`radio station takes over the role of a central instance co-ordinating the radio resources. This
`
`central radio station (Access Point, AP) which may be an access point to the wide area
`
`25
`
`network, periodically signals every 2 ms the MAC frame structure from the AP and the
`
`associated stations if required.
`The IEEE802.1 la standard describes a CSMA/CA (Carrier Sense Multiple
`
`Access/Collision Avoidance) method not based on reservations, in which all the radio
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`stations listen in on the medium and assume that the channel is unused for a minimum
`
`duration (Short InterFrame Space, SIFS) before 802.1 la-MAC frames, thus user data
`
`packets, are transmitted if necessary. The method is highly suitable for self-organizing ad hoc
`
`networks, but requires positive acknowledgements of all the packets. Measures supporting
`
`5
`
`service quality (Point Coordination Function PCF) in addition allow the support of
`
`multimedia applications. Fig. 2 shows by way of example the sequence for media access in
`
`accordance with IEEE802.1 la. In accordance with a variant of the standard a station is to
`
`then transmit an RTS packet (Ready To Send) and wait for a CTS packet (Clear To Send)
`
`from the addressed station before it is allowed to transmit user data. All the other stations in
`
`10
`
`the radio coverage area set a time monitoring (Network Allocation Vector, NA V) and do not
`
`transmit until the addressed station has sent an acknowledgement (ACK.nowledge, ACK).
`
`Wideband LANs in accordance with the HiperLAN/2 and 802.1 la standards
`
`will operate in the same frequency band in the future between 5 .15 and 5. 825 GHz. The
`
`wideband LANs work with Transmitter Power Control (TPC), it is true, with adaptive radio
`
`transmission methods and the Dynamic Frequency Selection (DFS) to minimize the
`
`alternating interfering effects, these methods, however, do not make optimum use and
`
`spreading possible of the radio channels over the stations which transmit in accordance with
`
`different standards. The guarantee of the service quality necessary for the multimedia
`
`applications is impossible in the case of interference caused by their own stations or stations
`
`of outside systems. In case of alternating interference, systems do not work efficiently and
`
`occupy a frequency channel even at low transmission rates.
`
`It is an object of the invention to provide a method, a wireless network and a
`
`control station which make efficient use of radio transmission channels possible.
`
`25
`
`This object is achieved for the method in accordance with the invention by an
`
`interface control protocol method for a radio system, which system comprises at least a
`
`frequency band provided for the alternate use of a first and a second radio interface standard,
`
`the radio system comprising stations which operate in accordance with a first radio interface
`
`.standard and/or a second radio interface standard, respectively, a control station being
`
`30
`
`provided which controls the alternate use of the frequency band.
`
`The invention is based on the idea of providing a comprehensive standard
`
`exchange of implicit or explicit control information in systems that have the same radio
`
`transmission methods but different radio transmission protocols. This makes a simple and
`
`efficient use possible of a radio channel via a plurality of radio interface standards.
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`The radio system comprises one or more stations. The stations may be, for
`
`example, computers of a wireless local area network. These stations may be arranged, for
`
`example, only for operation in accordance with a first or second radio interface standard. But
`
`it is also possible for stations to operate in accordance with both the first and the second radio
`
`5
`
`interface standard.
`
`A first number of stations preferably forms a wireless local area network in
`
`accordance with a first radio interface standard and a second number of stations forms a
`
`wireless network in accordance with a second radio interface standard. The first radio
`
`interface standard may be, for example, the HiperLAN/2 standard and the second radio
`
`10
`
`interface standard may be the IEEE802.1 la standard.
`
`For these two standards is reserved the frequency band from 5 .15 GHz to
`
`5.825 GHz.
`
`g
`1®
`~
`
`In accordance with the invention a control station is provided which controls
`
`the alternate use of the common frequency band of the two radio interface standards.
`
`The control station is preferably a station that may operate in accordance with
`
`both the first and the second radio interface standard.
`
`The control of the alternate use of the common frequency band may be
`
`effected in various ways. For example, it is possible to provide certain predefinable time
`
`intervals for the use of the first and second radio interface standard and allocate the frequency
`
`band alternately to the first radio interface standard and then to the second radio interface
`
`standard in a kind of time-division multiplex mode.
`
`However, it is advantageous to effect the allocation by means of adaptive
`
`protocols. The common radio channel can then be utilized more effectively particularly when
`
`the demand for transmission capacity in accordance with the first and the second radio
`
`25
`
`interface standard varies.
`
`In the advantageous embodiment of the invention as claimed in claim 2, the
`
`control station is provided, on the one hand, for controlling the access to the frequency band
`
`for stations operating in accordance with the first radio interface standard. If the first radio
`
`interface standard is, for example, the HiperLAN/2 standard, the control station performs the
`
`30
`
`function of the central controller (Access Point AP) in accordance with this standard. In that
`
`case the stations of the HiperLAN/2 standard send a request for capacity to the control station
`
`and the control station allocates transmission capacity to each respective station.
`
`On the other hand, the control station is provided in an advantageous
`
`embodiment of the invention as claimed in claim 2 for releasing the common frequency band
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`for access by stations operating in accordance with the second radio interface standard, if
`
`stations operating in accordance with the first radio interface standard do not request access
`
`to the frequency band. In this advantageous embodiment of the invention the first radio
`
`interface standard is given priority over the second radio interface standard in this manner.
`
`5
`
`The release of the common frequency band for the second radio interface standard may be
`
`effected, for example, explicitly by the sending of control information to the stations of the
`
`second radio interface standard.
`
`Alternatively, it is possible, for example, that the point coordinator provided in
`
`accordance with the IEEE802. l 1 a standard operates as the central control station and controls
`
`IO
`
`the alternate access of stations of the first and second radio interface standard to the common
`
`frequency band. In this advantageous embodiment of the invention the point coordinator
`
`;:,;,;,
`:.;,
`~2
`
`~y
`
`could for example periodically render the common frequency band available to another radio
`
`interface standard, for example, to the HiperLAN/2 standard.
`In the advantageous embodiment as claimed in claim 3, the control is effected
`
`in that the control station determines the respective duration in which the stations operating in
`
`accordance with the second radio interface standard can utilize the common frequency band.
`
`Determining the duration may advantageously be effected as claimed in claim 4 in that the
`
`control station sends a broadcast signal which informs the stations of a time period in which
`
`the frequency band can be used by stations operating in accordance with the second radio
`
`interface standard.
`
`It is an advantage of the invention that when radio systems are operated in
`
`phases in which no information is sent or received by a radio station in accordance with a
`first radio interface standard, the additional sending of information in accordance with
`
`another radio interface standard becomes possible, so that the access to the radio channel can
`
`25
`
`be controlled by competing radio systems.
`
`It is then possible for a first radio station operating in accordance with a first
`
`radio interface standard to additionally carry out certain functions described in a second radio
`
`interface standard, while the first radio station or a coordinating further radio station that
`
`transmits in accordance with the first radio interface standard determines the beginning and
`
`30
`
`duration of the phase that may be used by the first station for transmission in accordance with
`
`the second radio interface standard.
`
`Depending on the radio interface standard, beginning and duration can be
`defined only approximately, while the respective standards are violated regularly or from
`
`time to time. The first station may preferably end the phase during which it transmits in
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`29.03.2002
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`accordance with the second radio interface standard, while disregarding resulting interference
`
`in stations operating in accordance with the second radio interface standard.
`
`The first radio station may, in addition to functions in accordance with the
`
`second radio interface standard, also carry out functions that cause radio systems working in
`
`5
`
`accordance with the second radio interface standard or radio systems working in accordance
`
`with the first radio interface standard to interpret the radio channel as interfered and occupy
`
`another radio channel for its own operation.
`
`The efficient common use of a radio channel by different radio systems may
`
`be achieved via a suitable control protocol method. Such a radio interface control protocol
`
`10 method enables a first station of a radio system working in accordance with the first radio
`
`interface standard to control the access times to the radio channel by other stations. For this
`
`purpose this first station then has to carry out functions described in another, second radio
`
`interface standard in addition to the functions laid down by its own first radio interface
`
`standard at times at which stations working in accordance with the first radio interface
`
`1j
`~g
`
`standard do not send and do not expect information in accordance with the standard from the
`
`first station, while the first station or a further station determines the duration for which the
`
`first station is allowed to transmit in accordance with the second radio interface standard. The
`
`-
`
`duration of the operation in accordance with the second radio interface standard need not be
`
`.~
`
`determined exactly but may also be determined approximately. A transmission in accordance
`
`za: with the first radio interface standard can provide that the first station terminates the use of
`
`~;;;;
`
`Q
`
`the radio interface in accordance with the second radio interface standard without taking
`
`resulting interference into account in stations that send in accordance with the second radio
`
`interface standard.
`
`The object of the invention is achieved for the network by a wireless network
`
`25
`
`that has at least one frequency band that is provided for the alternate use by a first and a
`
`second radio interface standard, while the wireless network comprises stations that work in
`
`accordance with the first and/or the second radio interface standard, a control station being
`
`provided which controls the alternate use of the :frequency band.
`
`30
`
`Several examples of embodiment of the invention will be further explained
`
`below with reference to the drawing in the Figs. 1 to 3, in which:
`
`Fig. 1 shows the frame structure in accordance with the ETSI BRAN
`
`HiperLAN/2 standard,
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`Fig. 2 gives a diagrammatic representation of the access to a radio channel in
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`6
`
`29.03.2002
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`systems in accordance with the IEEE802.1 la standard, and
`
`Fig. 3 shows two wireless local area networks in accordance with a first and a
`
`second radio interface standard.
`
`5
`
`Fig. 1 shows the structure of the HiperLAN/2-MAC frame.
`
`Fig. 2 diagrammatically shows the media access in systems working in
`
`accordance with the radio interface standard IEEE802.11 a.
`
`In a HiperLAN/2 system the central controller can be controlled via the
`
`10 Access Point (AP) which periodically generates the MAC frame and then transmits the data
`
`of the broadcast phase to individually control the service quality (packet delay sending rate
`
`and so on) of individual links.
`
`Transmission in Figs. 1 and 2 with respect to the associated standards is
`
`understood to mean that a HiperLAN/2 AP in a partially unused downlink, uplink and direct(cid:173)
`
`mode phase could dispense with sending useless (dummy) information and giving 802.11-
`
`systems no opportunity to observe an unused channel for a period of time SIFS and starting
`the run as shown in Fig. 2. The AP could readily regain the control in which the transmission
`
`"
`
`in accordance with the HiperLan/2 standard does not suppress the broadcast phase, but
`
`1"'
`
`T 2ft
`
`::.:f:1,:
`1:;J
`
`transmission takes place. Likewise, the function PCF of the 802.11 standard could be used to
`
`occasionally render the radio channel available to HiperLAN/2 systems with a time limit
`
`(periodically).
`
`The alternate control of radio systems of different standards, which control is
`proposed here and discussed with respect to an example of the wideband LANs ETSI BRAN
`
`HiperLAN/2 and IEEE802.1 la, may guarantee in a heterogeneous environment in which
`
`25
`
`various radio systems simultaneously transmit very close together in the same spectrum, a
`
`decentrally controlled adaptivity relative to the transmission capacity available in the
`
`respective systems for the management of the respective current traffic supply, of the
`
`required service quality and of the environment of use. When the integrated controller in
`
`accordance with the invention is used, different radio systems may be made compatible in the
`
`30 way that they constructively coexist in the same frequency band and then can provide
`
`services that require a high service quality. The radio spectrum is clearly used more
`
`efficiently; without the implementation of the new method this is only possible with
`
`respective exclusively used radio channels.
`
`Fig. 3 diagrammatically shows two wireless local area networks.
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`A first wireless local area network comprises three stations 10, 11 and 12.
`
`These three stations 10, 11 and 12 work in accordance with the first radio interface standard
`
`A, for example, in accordance with the HiperLAN/2 standard.
`
`A second wireless local area network includes four stations 14, 15, 16 and 17.
`
`5
`
`These four stations 14, 15, 16 and 17 work in accordance with the second radio interface
`
`standard B, for example, in accordance with the IEEE802.l la standard.
`
`The stations may be, for example, computers which include a radio interface.
`
`The communication between the individual stations is effected in a wireless fashion, for
`
`example, by radio.
`
`10
`
`For wireless local area networks in accordance with the HiperLAN/2 and
`
`IEEE802.1 la standards the frequency band is comprised between 5.15 GHz and 5.825 GHz.
`
`A central control station 13 is provided which controls the alternate access by
`
`the first wireless network and the second wireless network to the common frequency band.
`
`This may be effected in an advantageous manner in that the station 13 sends a
`
`broadcast message to the stations 14 to 1 7 of the IEEE802.11 a standard when the stations 10
`
`to 12 do not need transmission capacity. This broadcast message preferably contains time
`
`information which informs the stations 14 to 17 of the IEEE802.11 standard how long they
`
`are allowed to utilize the common frequency band. During this time the control station 13 can
`
`also carry out functions in accordance with the IEEE802.1 la standard, for example, also be
`
`used for data transmission in accordance with the IEEE802.l la standard.
`
`If the stations 10 to 12 of the first wireless network are HiperLAN/2 stations,
`
`the control station 13 preferably also operates as the central control station (Access Point) of
`
`the HiperLAN/2 network and co-ordinates its radio resources. In HiperLAN/2 systems it is
`
`planned beforehand at what time the stations are allowed to send. For this purpose the
`
`25 HiperLAN/2 systems have a central controller (Access Point, AP) which receives the
`
`requests for capacity from the various stations and assigns capacity accordingly. The central
`
`control station 13 is preferably also provided for carrying out the function of the access point
`
`of the HiperLAN/2 standard. The central control station 13 then periodically signals every 2
`
`ms the MAC frame structure in accordance with the requirements of the individual stations of
`
`30
`
`the HiperLAN/2 network.
`
`Alternatively, it is also possible, however, in HiperLAN/2 systems for the
`
`function of the access point and the function of the alternating control of the access to the
`common frequency band by the first wireless network and the second wireless network to be
`
`realized in separate stations. In that case, however, with respect to the duration in which the
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`PHDE000238
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`frequency band can be utilized by the first or second radio interface standard a data exchange
`
`8
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`29.03.2002
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`is necessary between these separate stations.
`
`Alternatively, it is possible, for example, for the point co-ordinator provided in
`
`accordance with the IEEE802.11 standard to operate as a central control station and to
`
`5
`
`control the alternate access to the common frequency band by stations of the first and second
`
`radio interface standards. In this embodiment the point co-ordinator would, for example,
`
`periodically render the common frequency band available to another radio interface standard,
`
`for example, to the HiperLAN/2 standard.
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`PHDE000238
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`CLAIMS:
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`9
`
`29.03.2002
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`1.
`
`An interface-control protocol method for a radio system which has at least one
`
`frequency band that is provided for the alternate use by a first and a second radio interface
`
`standard, the radio system comprising stations which operate in accordance with a first radio
`
`interface standard and/or a second radio interface standard, a control station being provided
`
`5
`
`which controls the alternate use of the frequency band.
`
`2.
`
`A method as claimed in claim 1, characterized in that the control station
`
`controls the access to the frequency band for stations working in accordance with the first
`
`radio interface standard and in that the control station renders the frequency band available
`
`~ for access by the stations working in accordance with the second radio interface standard if
`w
`
`stations working in accordance with the first radio interface standard do not request access to
`
`the frequency band.
`
`3.
`
`A method as claimed in claim 1, characterized in that the control station
`
`e determines the respective duration in which the stations working in accordance with the
`
`second radio interface standard are allowed to utilize the frequency band.
`
`4.
`
`A method as claimed in claim 1, characterized in that the control station sends
`
`a broadcast signal informing the stations of a time duration in which the frequency band can
`
`20
`
`be used by stations working in accordance with the second radio interface standard.
`
`5.
`
`A method as claimed in claim 3, characterized in that the duration of operation
`
`in accordance with the first and second radio interface standards is laid down only
`
`approximately while the respective standards are violated regularly or from time to time.
`
`25
`
`6.
`
`A method as claimed in claim 1, characterized in that the control station
`
`terminates the use of the radio interface in accordance with the second radio interface
`
`standard by transmitting in accordance with the first radio interface standard, without taking
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`PHDE000238
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`account of resulting interference in stations working in accordance with the second radio
`
`IO
`
`29.03.2002
`
`interface standard.
`
`7.
`
`A method as claimed in claim 1, characterized in that the control station
`
`5
`
`controls the access to the frequency band by stations working in accordance with the first
`
`radio interface standard and in that duration and type of control of the radio interface in
`
`accordance with the second radio interface standard is determined by a further station and
`
`transmitted to the control station.
`
`10
`
`8.
`
`A method as claimed in claim 1, characterized in that the control station, in
`
`addition to functions in accordance with the second radio interface standard, also carries out
`
`functions which cause radio systems in accordance with the second radio interface standard
`
`to interpret the radio channel as interfered and to seize another radio channel for its own
`
`operation.
`
`9.
`
`A method as claimed in claim 1, characterized in that the control station also
`
`carries out functions which cause radio systems in accordance with the first radio interface
`
`standard to interpret the radio channel as interfered and to seize another radio channel for its
`
`own operation.
`
`10.
`
`A wireless network comprising at least one frequency band provided for the
`
`alternate use by a first and a second radio interface standard, the wireless network comprising
`
`stations which work in accordance with a first radio interface standard and/or in accordance
`
`with a second radio interface standard, a control station being provided which controls the
`
`25
`
`alternate use of the frequency band.
`
`11.
`
`A control station for a wireless network, the control station being provided for
`
`controlling the alternate use of a frequency band by stations which work in accordance with a
`
`first radio interface standard and stations which work in accordance with a second radio
`
`3 0
`
`interface standard.
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`Marvell Semiconductor, Inc. - Ex. 1002, Page 0013
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`
`~
`
`PHDE000238
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`. •
`
`ABSTRACT:
`
`11
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`29.03.2002
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`The invention relates to an interface-control protocol method for a radio
`
`system, which has at least one frequency band provided for the two-way alternate utilization
`
`of a first and a second radio interface standard. The radio system comprises a number of
`stations, which each function in accordance with a first radio interface standard and/or in
`
`5
`
`accordance with a second radio interface standard, in which a control station is provided that
`
`controls the two-way alternate utilization of the frequency band.
`
`Fig. 3
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`Marvell Semiconductor, Inc. - Ex. 1002, Page 0014
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`INVENTO