(56)
`
`References Cited
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`
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`7.43115? 131*
`200350031683? Al"
`200450018839 Al 1’
`200450233838 A1 1’
`2005:0068ng Al“
`2005:0201304 Al"
`200530350493 Al "‘
`200550236451 Al "‘
`200650030322 M"
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`
`W0
`
`8.32006
`WU-ZUOfi-"U 83 89? A3
`OTHER PUBLICATIONS
`
`BTU-"338
`45554311
`37013954
`455-"433
`370208
`370316
`.. 3705282
`4553436
`3703310
`455-"436
`. 3753340
`3705458
`
`_
`
`ibadc Akonai
`Primary Enmniner — OI nmidc '1'
`Amiga”! Examiner -— Shanlcll 1,. I-lcibcr
`(74) Attorney, Agent, or Firm - Kacvinsky I')aisak Bluni
`P111?
`
`ABSTRACT
`(57)
`Embodiments of System and Method for Communicating
`wilhin Broadband Wireless Networks are generally described
`herein. Other embodiments may be described and claimed.
`
`Int. (:1.
`H0411” 4/00
`H041. 12/24
`H04W 84/04
`[104W 88/10
`1104W92/02
`US. (:1.
`(“PC
`
`{2009.01 )
`(2006.01)
`(2009101)
`(2009.01)
`(2009.01 )
`
`[[0412 41/023 (2013.01); [104.1, 41/0226
`[201301)11-10411” 84/04 (2013.01); Ht‘MH/Sfla’h'i
`(201101): 1104117’92/02 (2013.01)
`4551435.]: 455/4352; 455/4353
`USPC
`Field of Classflication Search
`455143514353
`USPC
`See application file for complete search history.
`
`|||||||||||||||||||||||||||||||||||l|||||||||||||||||||||||||||||||||||||||
`USOOS977258B2
`
`(12) United States Patent
`Chou
`
`[10) Patent No.:
`(45) Date of Patent:
`
`US 8,977,258 82
`Mar. 10, 2015
`
`(54) SYSTEM AND METHOD FOR
`COMMUNICATle WITH FIXED AND
`MOBILE SUBSCRIBER STATIONS IN
`BROADBAN I) WIRELESS ACCESS
`NETWORKS
`
`inventor:
`
`Joey Chou. Scottsdalc‘ A7. (US)
`
`Assignee:
`
`Intel Corporation, Santa C 1am. CA
`(US)
`
`Notice:
`
`Subject to any disclaimer. 1111: term of this
`palcnl is extendcd or adjusted under 35
`U.S.(.‘. 154(1)) by 1596 days.
`
`11/222,675
`
`Sep. 9, 2005
`
`Prior Publication Data
`
`US 200710076639 A]
`
`Apr. 5‘ 2007
`
`“IEEE Standard 802‘16aTM—1EEE Standard for Local and Metro-
`politan Area Networks. Part
`l6: Air interface for Fixed Broadband
`Wireless Acccss Systems—Amendment 2: Medium Access Control
`Modifications and Additional Physical Layer Specifications for 2 -l l
`(3112". IEEE 510'. 802.163‘“ 2005. The Institute Electrical and
`Electronics Engineers. 1nc.. New York. NY. (2003). 318 pgs
`(Continual)
`
`21 Claims, 7 Drawing Sheets
`
`PETITIONERS 1059-0001
`IPR2016-00758
`
`

`

`US 8,977,258 B2
`Page 2
`
`(56)
`
`References Cited
`
`OTHER PUBLICAFIONS
`"IEEE Standard 802.1601W IEEE Slandard for Local and Metro-
`politan Area Networks. Part 16'. Air Interface 1331' Fixed and Mobile
`Bmmihand Wireless Access Syslems. Amendmenl 2: Physical and
`Medium Aecess Control Layers for Combined Fixed and Mobile
`Operation in Licensed Bands and Corrigendum I". [EL-3'3 Sid. 802.
`[60751—2005 mid HIEE Sid. 802.16T-‘L-2004’zfor! —2005 (Amend-
`ment and Con‘igmdum :0 IEEE 802.!6—-2004). The Instilule of
`Eleclrical and Electronics Engineers. lnc.. New York. NY. (2006].
`864 pgs.
`
`“IEEE Slandard RfllllélTM—IEEE Slandanl for Local and Metm-
`politan Area Networks. Pan [6: Air Interface for Fixed Broadband
`Wireless Access Syslems—Amendmenl
`I: Management Informa-
`tion 1330”. IEEE Sid. 802.!517“ 2005. IEEE, New York. NY.
`(2005). 257 pgs.
`Chou. J.. at 21].. "MAC and. PHY MIB 1hr WirelessMAN and
`Wirelesslllilnan BS and SS”. (Jul. 9. 2004). 1-120.
`Liang. C, "Wireless awareness for wireless intelligent nem'ork“.
`Communications. 2003. APC‘C 2003. 2. The 9th Asia-Pacific
`(Ionfemnce.(Sep. 2 |.2003),56 l 664.
`
`* ciled by examiner
`
`PETITIONERS 1059-0002
`IPR2016-00758
`
`

`

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`Sheet 1 of 7
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`US 8,977,258 B2
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`US. Patent
`
`PETITIONERS 1059-0003
`IPR2016-00758
`
`

`

`US. Patent
`
`Mar. 10, 2015
`
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`IPR2016-00758
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`

`

`US. Patent
`
`Mar. 10, 2015
`
`Sheet 3 of?
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`US 8,977,258 B2
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`SYNCHRONLZATION
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`SET CHANNEL
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`333
`
`PETITIONERS 1059-0005
`IPR2016-00758
`
`

`

`US. Patent
`
`Mar. 10, 2015
`
`Sheet 4 of?
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`US 8,977,258 B2
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`PETITIONERS 1059-0006
`IPR2016-00758
`
`

`

`US. Patent
`
`Mar. 10, 2015
`
`Sheet 5 of?
`
`US 8,977,258 B2
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`PETITIONERS 1059-0007
`IPR2016-00758
`
`

`

`US. Patent
`
`Mar. 10, 2015
`
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`PETITIONERS 1059-0008
`IPR2016-00758
`
`

`

`US. Patent
`
`Mar. 10, 2015
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`PETITIONERS 1059-0009
`IPR2016-00758
`
`

`

`US 8,977,258 B2
`
`1
`SYSTEM AND METHOD FOR
`COMMUNICATING Wl'l‘l-I FIXED AND
`MOBILE SUBSCRIBER STATIONS IN
`BROADBAND WIRELESS ACCESS
`NETWORKS
`
`‘l'l'iCl-INICAL FIELD
`
`and while the Va rBinds are being processed individually. This
`
`2
`ing to limit the scope of this application to any single inven-
`tion or inventive concept il'morc than one is in fact disclosed.
`FIG. 1 illustrates a broadband wireless access (BWA) net—
`work in accordance with sortie embodiments of the present
`invention. Broadband wireless network 100 includes base
`station (BS) IIIZ which may communicate with one or more
`fixed subscriber stations (SS) 104 and one or more mobile
`subscriber stations (MS) 106. Base station 102 may be
`coupled throuin network 108 to network management sys-
`tetn (NMS) 112. servers 116 and database 114. Network 103
`may be an internet-protocol {1P} based network. such as the
`internet. although the scope of the invention is not limited in
`this respect.
`Network 100 may be based on the [Iil‘lli 802. lo-2004 stan—
`dard and/or IIiI-Eii 802.16(e) proposed specification for wire-
`less metropolitan area networks (WMAN) referenced below.
`although the scope of the invention is not limited in this
`respect Base station 102 includes management inlbnnation
`base (MIB) 120 that may be managed directly by network
`management system 112. Subscriber stations 104 may also
`include subscriber stations management ini'onnation bases
`122 that may be managed directly by network management
`system 112. or indirectly by base station 102 which acts as a
`front-end proxy. In some embodiments. the front-end proxy
`may unwrap packets to determine to which subscriber station
`104 a packet should be liirwardcd based on the packet con-
`text. The packets may include management network protocol
`packets. such as simple network management protocol
`(SNMP) packets. although the scope of the invention is not
`limited in this respect. Mobile subscriber stations 106 [nay be
`notebookclient devices. for example, that may not include an
`MIB. Mobile subscriber stations 106 may be managed indi—
`rectly via base station 102 which may act asa back—end proxy.
`In these cmhodin'ienls1 the back-end proxy may convert the
`SNMP packets to a management protocol that mobile sub-
`scriber stations are running.
`In accordance with some embodiments of the present
`invention. the front-end proxy may be viewed as per-packet
`multiplexing as the proxy operation occurs before the SNl'S/IIJ
`packet has been completely parsed and before any of the
`packet‘ s VarBinds are examined. A packet may include one or
`more VarBinds that reference addition infomiation. such as
`indications of causes of failures. A description may be
`decoded from the VarBind. For example. if an SN MPvS
`request packet is to be rejected by an SNMP agent, the agent
`may send a report packet that contains one or more VarBinds
`showing the cause offailures. An SNMI’ manager application
`may decode the description of the failures from the one or
`more Verinds. Each SNMP message may be forwarded in its
`entirety to a new destination determined by the context of the
`request. Context is an attribute of an SNMP request that was
`created after the community string, In SNMI’VZ’; (which does
`not use community strings). the context is specified sepa—
`rately from the authentication secret.
`In SNMPVI and
`SNMPch= the community string serves a dual role as the
`authentication secret and as the context. Context may come
`prise a collection of management information accessible by
`an SNMP entity. An item of management information may
`exist in more than one context. An SNMP entity potentially
`has access to many contexts.
`In accordance with some embodiments of the present
`invention. the back—end proxy. on the other hand. may be
`viewed as per—VarBind multiplexing as the proxy operation
`may occurafter the SNMP packet has been completely parsed
`
`Embodiments of the present invention pertain to wireless
`networks and wireless communications. Some embodiments
`pertain to broadband wireless access (BWA) networks.
`
`BACKGROUND
`
`in wireless communication networks. including broadband
`wireless access (BWA) networks. a base station may desire to
`communicate with many different types of subscriber sta-
`tions. including fixed subscriber stations and mobile sub-
`scriber stations. Subscriber stations operating in accordance
`with different network protocols and standards may wish to
`concurrently communicate with a base station. Examples of
`different network protocols and standards include the Insti-
`tute of Electrical and Electronic Engineers (IEEE) 802.16(e)
`proposed specification 1hr both mobile and fixed subscriber
`stations and the llEl-iE 80216-2004 standard for fixed sub-
`scriber stations. 'lltese standards are referenced below.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 illustrates a broadband wireless acceSs (DINA) net—
`work in accordance with some embodiments of the present
`invention:
`FIG. 2 illustrates an example of a base station interface
`table in accordance with some embodiments of the presenl
`invention:
`FIG. 3 is a flow chart ofa downlink synchronization pro-
`cedure in accordance with some embodiments ofthe present
`invention:
`FIG. 4 is a flow chart of a base station network entry
`procedure in accordance with some embodiments of the
`present invention:
`FIG. 5 illustrates an example ofa management inibmlation
`base (MIB) structure in accordance with some embodiments
`of the present invention:
`FIG. 6 illustrates an example ofa base station capabilities
`subtree in accordance with some embodiments of the present
`invention: and
`FIG. 7 illustrates an example of a base station physical
`(PHY) layer subtree in accordance with some embodiments .
`of the present invention.
`DETAI LEI) DESCRIPTION
`
`..
`
`The following description and the drawings illustrate spc-
`cific embodiments of the invention sufficiently to enable
`those skilled in the art to practice them. Other embodiments
`may incorporate structural. logical. electrical. process. and
`other changes. Examples merely typify pessiblc variations.
`Individual components and functions are optional unless
`explicitly required. and the sequence ofoperations may vary.
`Portions and features of some embodiments may be included
`in or substituted for those of others. Embodiments of the
`invention set forth in the claims encompass all available
`equivalents of those claims. Embodiments of the invention
`may be referred to. individually or collectively. herein by the
`term “invention” merely fol-convenience and without intend—
`
`PETITIONERS 1059-0010
`IPR2016-00758
`
`

`

`US 8,977,258 B2
`
`application specific integrated circuits (ASlC s). and combi—
`
`3
`fronting may occur at the point where the SNMP agent would
`normally exchange data directly with the application’s data
`registers.
`In some embodiments, fixed subscriber stations 104 may
`be managed nodes. A managed node refers to devices that are
`managed by a management station of network management
`system 112. For example. fixed subscriber stations 104 and
`base station 102 may be managed nodes. The management
`agent may be an SNMP agent. In some embodiments. a man-
`aged device may be a network node that includes an SNMP
`agent and resides on a managed network. Managed devices
`may collect and store management
`information and tnay
`make the collected information available to network manage-
`ment system 112 using SNMP. for example. Managed devices
`may also include network elements and can be routers and
`access servers. switches and bridges. hubs, computer hosts. or
`printers. for example. In sortie embodiments. an agent may be
`a network-management management soflware module that
`may resides in a managed device. In some embodiments. an
`agent has local knowledge of management information and
`translates that
`information into a form compatible with
`SNMP. In some embodiments. network management system
`112 may execute applications that monitor and control man-
`aged devices. Network management system 1 12 may provide
`the bulk of the processing and memory resources required for
`network management. although the scope of the invention] is
`not limited in this respect.
`In some embodiments. the management information base
`defined by some embodiments of present invention tnay
`allow the migration ofconventional management in fonnation .
`bases to support both mobile and fixed subscriber stations.
`such as fixed subscriber station based on the lEEE 802.16-
`2004 standard and mobile and titted subscriber stations based
`on the llil-EI-S 802.l6(e) proposed specification. although the
`scope of the invention is not limited in this respect. In some
`embodiments. a standards based MIB and method to manage
`lEEE 802.16(e) based BWA networks is provided which may
`be very robust to support both lEEE 30216-2004 fixed and
`lEEE 802.16(e) mobile networks simultaneously. In sortie
`embodiments. the MIR and method may be flexible enough to
`support mobile subScriber stations that may use non-SNMP
`based management protocol. In accordance with embodi—
`tnents ofthe present invention. through messages exchanged
`during subscriber station network entry and capability nego-
`tiation. base station 102 determines the MAC version and
`whether fixed and mobile subscriber stations support mobil-
`ity.
`In accordance with some embodiments of the present
`invention. base station 102 may be able to manage both fixed
`subscriber stations 104 and mobile subscriber stations 106 _
`simultaneously when base station 102 has multiple sectors to
`support the llrilili 80216-2004 standard and the llilzili 802. 16
`(e) proposed specification. separately.
`In accordance with some embodiments of the present
`invention, base station 102 may be able to manage both fixed ..
`subscriber stations 104 and mobile subscriber stations 106
`simultaneously when base station 102 has multiple sectors to
`support. lEEE 8021672004 and lEEE 802.16(e] standards.
`separately.
`In some embodiments, base station [02. fixed subscriber
`stations 104 and mobile subscriber stations 106 may continu-
`nicale either orthogonal
`frequency division multiplexed
`[OFDM) communication signals or onhogonal frequency
`division multiple access (OFDMA) communication signals
`over a multicarrier communication channel. The multicarrier
`communication channel may be within a predetermined fre-
`quency spectrum and may comprise a plurality oforthogonal
`
`4
`subcarriers. In some embodiments. the orthogonal subcarri-
`ers may be closely spaced subcarr'iers. To help achieve
`orthogonality between the closely spaced subcarriers. each
`subcarrier may have a null at substantially a center frequency
`of the other subcarriers and!or each subcarrier may have an
`integer numherofcycles within a symbol period. althoughthe
`scope of the invention is not [limited in this respect.
`In sortie embodiments. base station 102 may be a Wireless
`Fidelity (Wil': i). Worldwide Intemperability for Microwave
`Access (WiMax). or broadband communication station.
`although the scope of the invention is not limited in this
`respect. In some embodiments. mobile subscriber stations
`106 may be portable wireless communication devices. such
`as personal digital assistants (PDAs), a laptop or portable
`computers with wireless communication capability. web tab"
`lets. wireless telephones wireless headsets. pagers. instant
`messaging devices. or other mobile devices that may receive
`and/or transmit information wirelessly.
`In some embodiments, the frequency spectrums for the
`n‘lulticarrier communication signals Communicated by base
`station 102. subscriber stations 104 and mobile subscriber
`stations 106 may comprise either a 5 GHZ frequency spec—
`trum or a 2.4 Gllz frequency spectrum. In these embodi-
`ments. the 5 61-12 frequency spectrum may include frequen-
`cies ranging from approximately 4.9 to 5.9 GHZ. and the 2.4
`Gllz spectrum may include frequencies
`ranging from
`approximately 2.3 to 2.5 61-17.. although the scope of the
`invention is not limited in this respect. as other frequency
`spectrums are also equally suitable. In some broadband and
`WiMax embodiments, the frequency spectrum for communi—
`cations may comprise frequency channels between 2 and 11
`GHz. although the scope ofthe invention is not limited in this
`respect.
`In some embodiments. base stat ion 102. subscriber stations
`104 and mobile subscriber stations 106 may communicate in
`accordance with specific cotmntuiication standards. such as
`the IEEE standards and proposed speci i'ications including the
`[El-5E 802.16 standard for wireletts metropolitan area net-
`works (WMANS). although the scope of the invention is not
`limited in this respect. For more information with respect to
`IIEI-ilfl 802.16 standards. please refer to “Hit-31?. Standards for
`Information Technology—Telecorrununicatious and Infor-
`mation Exchange between Systems—Local and Metropoli—
`tan Area Network~Specific Requirementsil’art 16: ISO!
`[EC 8802-16: 1999“ and related amendments/versions.
`Base station 102 may include one or more antennas 119.
`each of which may be associated with a different sector.
`Subscriber stations 104 may also include one or more anten-
`nas 118. Mobile subscriber stations 106 may also include one
`or more antennas not separately illustrated. Antennas 118 and
`119. including the antennas ofmobile subscriber stations 106.
`may comprise one or more directional or onuiidirmtional
`antennas. including, for example. dipole antennas. monopole
`antennas. patch antennas. loop antennas. microstrip antennas
`or other types of antennas suitable for transmission of radio—
`frequency (RF) signals. In some embodiments. instead oftwo
`or more antennas. a single antenna with multiple apertures
`may be used.
`Although the elements of base station 102. subscriber sta-
`tions 104 and mobile subscriber stations 106 are illustrated as
`
`several separate functional elements. one or more ofthe lime-
`tional elements may be combined and may be implemented
`by combinations of software-configured elements. such as
`processing elements including digital
`signal processors
`(DSPs). and/or other hardware elements. For example. sortie
`elements may comprise one or more microprocessors. DSPs.
`
`PETITIONERS 1059-0011
`IPR2016-00758
`
`

`

`US 8,977,258 B2
`
`performed.
`
`6
`308, the subscriber station attempts to synchronized with and
`receive the preamble on the downlink (DL) using thecharmcl.
`FFT size and Cl) size from operations 302 through 306. Once
`the subscriber station is able to synchronize with the pre-
`amble in operation 308, the channel and [WT size is correct.
`The subscriber station can then determine the proper size of
`the cyclic prefix in operations 3 18 through and 322. When the
`cyclic prefix is correct. the frame control header (FCH) will
`be received properly irt operation 318. Iftlte subscriber station
`exhausts all possible FFT sizes through the perfonnartce of
`operations 310 and 31 2 without being able to properly receive
`the downiink preamble, and when the number of channels is
`not exhausted, as determined in operation 314, a new channel
`may be selected in operation 316 allowing the synchroniza—
`tion to be performed on the new iy selected channel. if the
`station exhausts all channels and FF’I‘ sizes through the per-
`formance of operations 310. 312 and 314. or if the subscriber
`station exhausts all possible cyclic prefixes through the per-
`formance of operations 320 and 322 without being able to
`receive the FC H. synchronization may fail in operation 324
`and the mobile or fixed subscriber station may not be able to
`communicate with the base station.
`When the FCI—l is properly received in operation 318. the
`subscrin station may set the FFT size object in operation
`326 and may transmit a network entry request message. such
`as a ranging request (RNG_RI£Q) to the base station in opera-
`tion 328.
`In some embodiments, the downlink PHY data units traits—
`mined by the base station may begin with a long preamble.
`which is ttsed for PHY synchronization. The preamble may
`be followed by a FCH burst that contains a downlinit front
`prefix which specifies the burst profile and length of one or
`SWOT-Bi downiin bursts immediately following the FCH
`When the FCH is received and decoded correctly, the CP size
`is set correctly.
`FIG. 4 is a flow chart of a base station network entry
`procedure in accordance with sortie embodiments of the
`present invention. Network entry procedure 400 may be per-
`lbrmcd by a base station, such as base station 102 (FIG. 1). for
`admitting a fixed or mobile subSCriber station to the network.
`Procedure 400. among other things. determines the opera—
`tional mode ofthe fixed or mobile subscriber station request—
`ing network entry.
`In operation 402. a ranging request
`(RNG_R13Q)1nay be received at the base station. The ranging
`request may have been transmitted by the subscriber or
`mobile subscriberstation itt operation 328 (FIG. 3). As part of
`network entry procedure 400, a base station may generate and
`or update its management information base 120 (FIG. 1) for
`the newly admitted fixed or mobile subscriber station. In
`operation 404, the base station detennines whether the trans—
`mitting subscriber station is a station operating in accordance
`with the III-LEE 80216—2004 standard. If so. operations 406
`through 410 are perlbrmed.
`If in operation 404. the base station determines that the
`transmitting subscriber station is a station operating in accor—
`dancewith the IEEE 802.16(e) proposed specification, a reg—
`istration request (REG_REQ) may be received in operation
`412. Operation 414 determines whether or not the transmit-
`ting subscriber station supports a mobility feature. If the
`ruobility feature is supported. the transmitting station is a
`mobile subscriber station. such as one of mobile subscriber
`stations 106 (FIG. 1). and operations 416—420 are perfonned.
`If the mobility feature is not supported. the transmitting sta—
`tion is a fixed subscriber station, such as one of fixed sub—
`scribcr stations 104 (FIG. 1). and operations 422-426 are
`
`5
`nations of various hardware and logic circuitry for perform—
`ing at least the functions described herein. In sortie embodi—
`ments. the functional elements base station 102. subscriber
`stations 104 and mobile sttbscriber stations 106 may refer to
`one or more processes operating on one or more processing
`elements.
`FIG. 2 illustrates an example of a base station interface
`table in accordance with sortie embodiments of the present
`invention. Base station interface (it) table 200 may be used to
`chamcteri'ze a multi-sector base station. such as base station
`102 that suppons OFDM and OFDMA comruunications with
`various fast-Fourier Transform {Fl-"1) sizes. In this example.
`table 200 may be ttsed to characterize a five sector base station
`for FFT sizes of2048, 1024, 512. and 128, although the scope
`of the present invention is not limited in this respect. The
`sectors may correspond to different antenna sectors of a base
`station. In sortie embodiments. the base station ntay employ
`onltogonal communications at leastwithin each adjacent sec-
`tor. In sonic embodiments. when base slat ion 102 communi-
`cates with the fixed and mobile subscriber stations within a
`plurality of antenna sectors. base station 102 may sitnultae
`neously communicates with at least sortie of the admitted
`mobile subscriber stations and at least sortie of the fixed
`subscriber station using differing fast Fourier transform
`(FF'l‘) sizes identified in the management infonnation base. in
`these embodiments, at least some of the antenna sectors using
`the different I-‘i‘T sires. In some embodiments. prior to trans-
`mitting the network admission requests, the fixed and mobile
`subscriber stations may synchronize to downiink channels
`transmitted by base station 102 by attempting to synchronize _
`with a frame preamble for different channels and different
`FFT sizes to determine a correct channel and F FT size being
`used by base station 102. and wherein after the correct chan-
`nel and FFT size are detcnnined. the fixed and mobile sub-
`scriber stations attempt to process a frame control header for
`different cyclic prefix sizes to determine a correct cyclic
`prefix size,
`As illustrated in Table 200. a base station may communi-
`cate with subscriber stations and mobile subscriber stations
`based on the following physical (PHY) layer configurations:
`a SS batted on II-il-FJ-i 80216-2004 (i.e.. OFDM 256 or
`OFDMA 2048]; a SS based on IEEE 802.16(e) (i.e.. OFDMA
`with an FFT size of 1024. 512. and 128) and a MS based on
`IEEE 802.1603) (i.e.. OFDMA with an FFT size 011024. 512.
`and 128). The use of table 200 within a base station is dis-
`cussed in more detail below.
`
`FIG. 3 is a flow chart ofa downlink synchronization pro-
`cedure in accordance with some embodiments of the present
`invention. Downlink synchronization procedure 300 may be
`performed by either mobile subscriber stations. such as _
`mobile subscriber stations 106 (FIG. 1), or fixed subscriber
`stations. such as fixed subscriber stations 104 (FIG. 1). to
`attenth to synchronize with a base station. such as base
`station 102 (FIG, I). and receive a downlink (DL) channel. As
`part ofdownlink synchmttization procedttrc300. a subscriber ..
`station attempts to determine the frequency channel. the FFT
`size and the cyclic prefix (CP) size for subsequent admission
`to a broadband wireless access network, such as network 100
`(FIG. 1) and communication with the base station. such as
`base station 102 (FIG. I).
`As shown in operations 302 through 316. the subscriber
`station attempts to properly receive a preamble of the down-
`Iink signals from the base station for different channels and
`different FFT sizes. In operation 302, the subscriber station
`determines and sets the channel. in operation 304. the sub—
`scriber station sets the FFT size. and in operation 306. the
`subscriberstation sets the cyclicprefix (CP) size. In operation
`
`PETITIONERS 1059-0012
`IPR2016-00758
`
`

`

`US 8,977,258 B2
`
`8
`quantities within the processing system’ s registers or memo—
`ries, or other such information storage. transmission or dis-
`play devices.
`Embodiments may be implemented in one or a combina-
`tion ol‘hardware. firmware and so ftwarc. Embodiments may
`also be implemented as instructions stored on a computer-
`readable medium. which may be read and executed by at least
`one processor to perform the operations described herein. A
`computer-readable medium may include any mechanism for
`storing or transmitting irflbnnation in a form readable by a
`machine (43.3.. a computer). For example, a computer-read-
`able tnediurrt may include read—only memory (ROM). ran~
`dour—access memory (RAM), magnetic disk storage media,
`Optical storage media. [lash-memory devices. and other stor-
`age devices zuid media.
`The Abstract is provided to comply with 37 CPR. Section
`l.72(b) requiring an abstract that will allow the reader to
`ascertain the nature and gist of the technical disclosure. It is
`submitted with the understanding that it will not he used to
`limit or interpret the scope or meaning of the claims.
`
`TABLE AND FIELD DESCRIPTIONS
`
`Below is an example ol‘abstract syntax notation (ASNI .1]
`for MIB 122
`
`7
`In some embodiments. operation 406 may (described in
`abstract syntax notation (ASND set MAC version object—
`wmanIstMacVersionzieeeSOZ Dot16012004. and may set
`mobility object—handoverSupport. sleepModeSupport, and
`idleModeSupport bits in wmanIflBsMsOfdmaReqCapMo-
`bilityFeature to “0”. Operation 408 may include receiving the
`mobility object and operation 410 may include identifying
`the station as an 80216-2004 mobile station.
`In some
`embodiments, operation 416 may set MAC version object —
`wmanlstMacVersion to ieee802 Dotlée. and may set
`mobility object—handoverSupport, sleepModeSupport, and
`idleMudeSupport bits in wmanlllisMsOl‘dmachCapMo-
`bilityl'ieature to “ l Operation 418 may include receiving the
`mobility object and operation 420 may include identifying
`the station as an gnome mobile station. In some embodi~
`ments, operation 422 may set MAC version object—wmanl—
`l‘BsMacVersion to ieee802 Dotlfie. and may set mobility
`object—handoverSuppon, sleepModeSupport. and idleM-
`odeSupport
`bits
`in wmanlflBSMsOfdmaReqCapMobili-
`tyl-leaturc to “0". Operation 424 may include receiving the
`mobility object and operation 426 may include identifying
`the station as an 802.16e subscriber station. These table
`entries are described in more detail below.
`FIG. 5 illustrates an example ofa management infonnation
`base (MlB) structure in accordance with sortie embodiments
`of the present invention MIB structure 500 (wntanI fMib) is a
`high level M113 which may be suitable for use with base
`station 102 (FIG. 1) including base stations operating in
`accordance with IEEE 802.16 standards. although the scope
`of the invention is not limited in this reSpect. In these example
`embodiments, M113 structure 500 is organized based on the
`reference model as defined in IEEE 80216-2004 standard.
`
`cclrté).
`
`MIB structure 500 includes ot‘three groups: wmanllBsOb-
`jects 502. which includes managed objects to be implemented
`in the SNMP agent in the base station, wmanItSsObjects 504
`which includes managed objects to be implemented in the
`SNMP agent in the subscriber stations. and wmanIiCorm
`monObjects 506 which includes common managed objects to
`be implemented in the SNMP agent in the base station and
`subscriber stations. In some embodiments. MIB structure 500
`may chCribe enhancements for IEEE 802.]6f M185 to sup—
`port mobility features. The wntanliBst, for example,
`is
`described in FIG. 6 below.
`
`FIG. 6 illustrates an example ol'a base station capabilities
`subt‘ree in accordance with some embodiments of the present
`invention. Base station capabilities subtree 600 incl