IEEE d-04/65 Project. IEEE Broadband Wireless Access Working Group <

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1 00-0- IEEE 0.d-0/ Project IEEE 0. Broadband Wrele Acce Workng Group < Ttle Date ubmtted Enhancng MIMO feature for OFDMA PHY layer ource: Wen Tong, Peyng Zhu, Mo-Han Fong, Jangle Ma, Hang Zhang and Mng Ja Nortel Network 00 Carlng Avenue Ottawa, ON. KH E CANADA Re: Contrbuton on comment to IEEE 0.d Voce: ()-- Fa: ()-- wentong@nortelnetwork.com Abtract Purpoe Notce Releae Patent Polcy and Procedure Contrbuton elaboratng of the MIMO enhancement for 0.d OFDMA Adopt nto IEEE 0. REVd/D document Th document ha been prepared to at IEEE 0.. It offered a a ba for dcuon and not bndng on the contrbutng ndvdual() or organzaton(). The materal n th document ubject to change n form and content after further tudy. The contrbutor() reerve() the rght to add, amend or wthdraw materal contaned heren. The contrbutor grant a free, rrevocable lcene to the IEEE to ncorporate materal contaned n th contrbuton, and any modfcaton thereof, n the creaton of an IEEE tandard publcaton; to copyrght n the IEEE name any IEEE tandard publcaton even though t may nclude porton of th contrbuton; and at the IEEE ole dcreton to permt other to reproduce n whole or n part the reultng IEEE tandard publcaton. The contrbutor alo acknowledge and accept that th contrbuton may be made publc by IEEE 0.. The contrbutor famlar wth the IEEE 0. Patent Polcy and Procedure < ncludng the tatement "IEEE tandard may nclude the known ue of patent(), ncludng patent applcaton, provded the IEEE receve aurance from the patent holder or applcant wth repect to patent eental for complance wth both mandatory and optonal porton of the tandard." Early dcloure to the Workng Group of patent nformaton that mght be relevant to the tandard eental to reduce the poblty for delay n the development proce and ncreae the lkelhood that the draft publcaton wll be approved for publcaton. Pleae notfy the Char <malto:char@wreleman.org> a early a poble, n wrtten or electronc form, f patented technology (or technology under patent applcaton) mght be ncorporated nto a draft tandard beng developed wthn the IEEE 0. Workng Group. The Char wll dcloe th notfcaton va the IEEE 0. web te <

2 00-0- IEEE C0.d-0/ Conoldaton and elaboraton of the MIMO feature for 0.d OFDMA Introducton Th contrbuton decrbe the MIMO enhancement to IEEE0.REVd/D OFDMA PHY. The followng PHY feature are propoed: DL MIMO Preamble DL MIMO cattered plot for FUC, PUC UL MIMO tle, MIMO bn and cattered plot MIMO antenna confguraton and tranmon format MIMO H-ARQ MIMO DL fat gnalng upport To upport MIMO-OFDMA, the MAC enhancement are alo propoed, whch nclude: MIMO_DL_Confg_IE DL burt agnment to upport adaptve MIMO tranmon UL burt agnment to upport adaptve MIMO tranmon Dynamc CQICH allocaton and the ue of CQICH_ID for DL burt allocaton In addton, everal bac OFDMA PHY feature are decrbed to enhance the performance for the nterference lmted mult-cell envronment. DL FUC and PUC cattered plot plannng Dfferental Modulaton for range etenon pecfc tet change. DL MIMO Preamble Contructon and backward compatble wth non-mimo [Add the followng tet nto ecton...] tart tet propoal For each egment a defned n prevou ecton, two or four antenna are ued to tranmt the MIMO tranmt dverty gnal. Therefore from the defnton n ecton..., the followng apple: Each egment ue type of preamble carrer-et (one for each antenna or par of antenna) out of the et n the followng manner: For two tranmt MIMO: egment 0 - carrer et 0 ued by antenna 0, preamble carrer et ued by antenna egment - carrer et ued by antenna 0, preamble carrer et ued by antenna egment - carrer et ued by antenna 0, preamble carrer et ued by antenna For four tranmt MIMO: egment 0 - carrer et 0 ued by antenna 0 and, carrer et ued by antenna and egment - carrer et ued by antenna 0 and, carrer et ued by antenna and egment - carrer et ued by antenna 0 and, carrer et ued by antenna and The ame PN ere a defned n that... ecton alo ued n the MIMO tranmt dverty mode End tet propoal

3 00-0- IEEE C0.d-0/. DL MIMO cattered plot for FUC and PUC [Add the followng tet nto ecton...] tart tet propoal The ame ymbol tructure defned n ecton... and... hall apply for the MIMO tranmt dverty mode. The plot allocated to each antenna and ther detal are pecfed n Table. whch pecfe the plot et and actual plot nde ued for dfferent MIMO tranmon and only frt par of plot hown. FUC Table DL plot allocaton for MIMO mode OFDMA ymbol nde Antenna-0 Antenna- Antenna- Antenna- k PN π() () -PN π() (+) PN π()+ () -PN π()+ (+) k+ PN π() (+) PN π() () PN π()+ (+) PN π()+ () -tranmt k PN π()+! () -PN π()+ (+) PN π()+ () -PN π()+ (+) PN π()+ (+) -PN π()+ (+) PN π()+ (+) -PN π()+ (+) PN π() (+) PN π() () PN π()+ (+) PN π()+ () k+ PN π()+ (+) PN π()+ (+) PN π()+ (+) PN π()+ (+) PUC -tranmt k PN π() () -PN π() (+) PN π()+ (+) -PN π()+ (+) PN π()+ (+) -PN π()+ (+) PN π() (+) PN π() () k+ PN π()+ (+) PN π()+ (+) PN π()+ (+) PN π()+ (+) Where PN j () denote the j th ubcarrer wth th plot PN equence and π( ) the permutaton rule defned n Table for FUC Varbleet plot and n Table for PUC repectvely. (ung egment X rangng from 0..). InFDD mode no dcontnuty of the plot et rotaton allowed plot et and actual plot nde ued for dfferent tranmon (ung egment X rangng from 0..). In FDD mode no dcontnuty of the plot et rotaton allowed. Table Tranmt dverty plot allocaton Tranmon Varable plot et ued hft ndce of varable plot et by Contant plot et ued ubchannel allocated to regular uer hall be tranmtted by Antenna 0 only, whle ubchannel that are allocated to tranmt dverty MIMO ue hall be tranmtted from both allocated antenna. Preamble carrer hall be dvded between the two antenna by allocatng the frt carrer (from the plot carrer allocated for the pecfed egment) and then every econd carrer up to the end of the plot to antenna 0, and all the remanng carrer to antenna End tet propoal [Add the followng tet nto ecton...] tart tet propoal

4 00-0- IEEE C0.d-0/ Frequency ymbol tme k k+ k k+ -tranmt antenna -tranmt antenna Plot ub-carrer for antenna 0& Plot ub-carrer for antenna & Data ub-carrer Fgure MIMO plot for DL cluter End tet propoal UL MIMO tle, MIMO UL bn and cattered plot [Add the followng tet nto ecton...] tart tet propoal Uplnk MIMO Not changed compared to the regular mode of operaton. A two tranmt MIMO burt n the uplnk defned a MIMO tle and uplnk bn, -tranmt dverty data or -tranmt patal multpleng data can be mapped onto each ubcarrer, each MIMO tle compoed of -contnuou ubcarrer and contnuou tme ymbol t' confguraton llutrated n Fgure -. One ubchannel contructed from uplnk MIMO tle, wthn each burt, there are 0 data ubcarrer and fed-locaton plot ubcarrer. Each MIMO bn compoed of -contnuou ubcarrer and contnuou tme ymbol t' confguraton llutrated n Fgure -. Antenna 0 Antenna Frequency PN -PN ymbol tme PN PN PN -PN PN PN Plot ub-carrer Data ub-carrer Fgure - UL MIMO tle

5 00-0- IEEE C0.d-0/ Antenna 0 Antenna PN PN PN -PN -PN -PN PN PN PN PN PN PN PN PN PN -PN -PN0 -PN PN PN0 PN PN PN PN Plot ub-carrer Data ub-carrer Fgure - UL MIMO bn Two ngle tranmt antenna can perform collaboratve patal multpleng onto the ame ubcarrer. In th cae, the one hould ue the uplnk tle wth pattern-a, and the other hould ue the uplnk tle wth pattern-b. Fgure - depct the uplnk tle and Fgure - depct the uplnk bn. Pattern-A PN Pattern-B Frequency ymbol tme PN PN PN Plot ub-carrer Data ub-carrer Null ub-carrer Fgure -. uplnk tle for collaboratve patal multpleng Frequency PN PN PN PN PN PN OFDM ymbol PN PN PN PN PN PN Pattern-A Pattern-B Plot ub-carrer Data ub-carrer Null ub-carrer Fgure - uplnk bn for collaboratve patal multpleng

6 00-0- IEEE C0.d-0/ End tet propoal MIMO antenna confguraton and tranmon format [Add the followng tet nto ecton...] tart tet propoal Tranmon through antenna (poble enhancement) The Tranmt dverty cheme could be further enhanced by ung antenna at the tranmon te. Two antenna are now beng ued n order to tranmt each ymbol (the frt antenna tranmt the gnal a defned n... and..., and the econd tranmt the ame gnal wth a comple vector rotaton), th tranmon hall create addtonal multpath receved by the uer, thee multpath am are to reduce the effect of the Raylegh channel varaton. Th method gve the pace dverty aocated wth the TC/FHDC wth an addtonal multpath creaton caued by another antenna; th cheme preented n Fgure : Fgure Illutraton of Tranmt dverty ung antenna Th method doe not change the channel etmaton proce of the uer, therefore th cheme could be mplemented wthout any change made to the Tranmt dverty uer.... MIMO antenna confguraton and tranmon format Aumng that the N T the number of tranmt antenna at B and N R the number of receve antenna at termnal. The MIMO confguraton denoted a N T N R.. For the MIMO down lnk tranmon, the pace tme codng employed, a quaorthogonal pace tme tranmt dverty (QOTTD) code ued a the mother code for pace tme codng, the QOTTD can be punctured n-tme and n-pace to optmze for dfferent receve antenna confguraton. Aumng the MIMO tranmon and recepton can be epreed by YH, where Y M the output of MIMO channel and H MNT the MIMO channel and denote the pace tme codng matr., wth the row nde ndcate the antenna number and column nde ndcate the ymbol tme. In all the MIMO tranmon confguraton the dfferent tranmt antenna, the antenna... confguraton: (pace tme codng rate ) confguraton: (pace tme codng rate ) By n-tme puncturng the column &, & and & of confguraton (pace tme codng rate ) By n-tme puncturng the column, and of, 0... confguraton: (pace tme codng rate ) By n-pace puncturng antenna & and n-tme puncturng column & and & of

7 00-0- IEEE C0.d-0/..., confguraton: (pace tme codng rate ), By n-tme puncturng the even column of :, The MIMO tranmon format, and generate pace tme tranmt dverty (TTD), and the format and, generate the vertcal patal multpleng (M) End tet propoal MIMO H-ARQ [Add new ecton...] tart tet propoal MIMO ub-packet generaton for H-ARQ In the MIMO tranmon, for both downlnk and uplnk, the HARQ re-tranmon ub-packet can be generated by ung the pace tme code ncremental redundancy veron. The tranmon rule for pace tme coded ncremental redundancy code et lted n Table aaa- and Table aaa-. Table aaa- H-ARQ Incremental pace tme codng redundancy (-tranmt antenna cae) ntal tranmon odd re-tranmon even re-tranmon pace tme code ncremental redundancy (0) N R ( odd ) N R N R ( even) Table aaa- H-ARQ Incremental pace tme codng redundancy (-tranmt antenna cae) ntal tranmon odd re-tranmon even re-tranmon pace tme code ncremental redundancy (0) N R ( odd ) N R ( even) N R The hall proce the ntal tranmon, t re-tranmon and nd re-tranmon etc n the form of pace tme decodng. The re-tranmon of FEC code word hall ue the Chae combng re-tranmon veron, n th cae, the ub-packet nde alway et to zero n ecton End tet propoal Fat DL gnalng channel upport

8 00-0- IEEE C0.d-0/ [Add new ecton...] tart tet propoal MIMO fat gnalng zone The AA dverty MAP zone ued for the MIMO mode to tranmt MIMO pecfc compreed DL_MAP uch a MIMO DL Enhanced IE format. The contructon of th zone a follow: the meage wth QPK rate ½ wth repetton denoted a where m denote ubcarrer number n denote the OFDM ymbol number. MIMO_DL_Confg_IE meage then dfferentally pace m, n m, n+ tme encoded n the OFDM ymbol drecton a: Z n Z n X where, n X for m, n m, n+ m N offet, N offet +,K, where the t row of Z n mapped onto t tranmt antenna and nd row of Z n mapped onto nd tranmt antenna and the N offet the ub-carrer offet End tet propoal m, n. MIMO_DL_Confg_IE [Change the followng tet n table ] tart tet propoal Table -OFDMA downlnk Frame Pref format ynta ze Note DL_Frame_Pref_Format() { bt Frt channel bt Lat channel bt Mdamble Ued bt 0 - No mdamble on downlnk - Optonal mdamble ued n downlnk Rangng_Change_Indcaton bt Repetton_Codng_Indcaton bt 00 - No repetton codng on DL-MAP 0 - Repetton codng of ued on DL-MAP 0 - Repetton codng of ued on DL-MAP - reerved; hall be et to zero. AA/MIMO Indcaton bt 0 AA - MIMO DL-Map_Length } bt End tet propoal DL Burt Agnment to upport Adaptve MIMO Tranmon [Add a new ecton...]

9 00-0- IEEE C0.d-0/... MIMO DL Bac IE format In the DL-MAP, a MIMO-enabled B may tranmt DIUC wth the MIMO_DL_Bac_IE() to ndcate the MIMO mode of the ubequent downlnk allocaton to a pecfc MIMO-enabled CID. The MIMO mode ndcated n the MIMO_DL_Bac_IE() hall only apply to the ubequent downlnk allocaton untl the end of frame. Table - MIMO DL Bac IE ynta ze Note MIMO_DL_Bac_IE () { Etended DIUC bt 00 Length bt Length n byte Num_Agn bt For ( 0; < Num_Agn; ++) { CID bt bac CID OFDMA ymbol offet 0 bt ubchannel offet bt Bootng bt No. OFDMA ymbol bt No. ubchannel bt TC_Mode bt 0: TTD; : M mode ; : M mode If ((TC 0) (TC ) { DIUC } bt 0- burt profle ele { Num_layer bt for ( 0; <Num_layer; ++ ) { Layer_nde bt DIUC} bt }}}. UL Burt Agnment to upport Adaptve MIMO Tranmon [Add a new ecton...0]...0 MIMO UL Bac IE format In the UL-MAP, a MIMO-enabled B may tranmt UIUC wth the MIMO_UL_Bac_IE() to ndcate the MIMO mode of the ubequent uplnk allocaton to a pecfc MIMO-enabled CID. The MIMO mode ndcated n the MIMO_UL_Bac_IE() hall only apply to the ubequent uplnk allocaton untl the end of frame. Table - MIMO UL Bac IE ynta ze Note MIMO_UL_Bac_IE () { Etended UIUC bt 00 Length bt Length n byte Num_Agn

10 00-0- IEEE C0.d-0/ For ( 0; < Num_agn; ++ ) { CID bt bac CID UIUC bt MIMO_Control bt For dual tranmon capable 0: TTD; : M For Collaboratve M capable 0: plot pattern A; : plot pattern B Duraton bt In OFDMA lot (ee...)

11 00-0- IEEE C0.d-0/ 0 Addtonal OFDMA PHY Enhancement. DL FUC cattered plot plannng [Add the followng tet nto ecton...] tart tet propoal Downlnk ubchannel ubcarrer allocaton Each ubchannel compoed of ubcarrer. The ubchannel ndce are formulated ung a R ere, and allocated out of the data ubcarrer doman. The data ubcarrer doman nclude ubcarrer, whch are the remanng ubcarrer after removng from the ubcarrer' doman (0-0) all poble plot and zero ubcarrer (ncludng the DC ubcarrer). The allocated vlaue of the varableet plot defned n Table hall add an offet (ID Cell )mod, and nce the down lnk tranmon OFDMA ymbol par baed therefore the allocated of the varableet plot hall be baed on the OFDMA ymbol par. After allocatng the data ubcarrer doman, the procedure of parttonng thoe ubcarrer nto ubchannel hall be a pecfed n ecton End tet propoal Dfferental Modulaton for range etenon [Add the followng tet nto ecton...] tart tet propoal Addtonal dfferental modulaton for MIMO, IO and IMO are lted n table zzz- Table zzz- dfferental pace tme code for, and tranmt antenna Antenna Confguraton Modulaton Rule X -tranmt antenna X Z Z Table - -tranmt antenna X Z Z X -tranmt antenna X Z Z X For ngle antenna tranmon the nput bt and ymbol mappng hown n Table zzz- Table zzz- π/-dqpk modulaton

12 00-0- IEEE C0.d-0/ End tet propoal Codeword b 0b Modulaton ymbol, X 00 0 j - 0 -j. Dynamc CQICH Allocaton and the Ue of CQICH_ID for DL Burt Allocaton The number of avalable CQICH on the uplnk dependent on the amount of uplnk ub-carrer and OFDM ymbol allocated for the CQICH. The fat CQI feedback repreent non-neglgble overhead on the uplnk and therefore the CQICH reource hould be dynamcally allocated and de-allocated to dfferent. The dynamc allocaton and de-allocaton to dfferent hould be done wthout ncurrng too much downlnk gnalng overhead. We therefore propoe to allow the opton of allocatng/de-allocatng the CQICH on a multple-burt ba rather than on a per-burt ba. We propoe to broadcat the regon allocated to CQICH on the Uplnk Channel Decrptor (UCD). A broadcat n the UCD, there a CQICH_ID aocated wth each CQICH. Each CQICH dynamcally allocated or de-allocated to a through a new UL-MAP nformaton element called CQICH_Alloc_IE(). Once allocated, the tranmt channel qualty nformaton on the agned CQICH on every ubequent frame, untl the receve a CQICH_Alloc_IE() to de-allocate to agned CQICH. When a agned a CQICH, there a one-to-one mappng between the and the CQICH_ID agned. Therefore, we can replace the -bt bac CID by the maller ze CQICH_ID when allocatng DL burt to the. Th reduce the DL gnalng overhead. To acheve th, we ntroduce a new nformaton element on the DL-MAP,.e. MIMO_DL_Enhanced_IE(). [Modfy Table n ecton...] Table UCD Meage Format ynta ze Note UCD_Meage_Format() { Management Meage Type 0 bt Uplnk channel ID bt Confguraton Change Count bt Mnlot ze bt Rangng Backoff tart bt Rangng Backoff End bt Requet Backoff tart bt Requet Backoff End bt TLV Encoded nformaton for the overall channel varable TLV pecfc Begn PHY pecfc ecton { ee applcable PHY ecton. for ( ; < n; ++) { For each uplnk burt profle to n. Uplnk_Burt_Profle varable PHY pecfc } CQICH_Profle_Included bt 0: no CQICH Profle ncluded : CQICH Profle ncluded

13 00-0- IEEE C0.d-0/ } } If (CQICH_Profle_Included) { CQICH_Profle } 0 or varable ee ecton... [Add a ecton...0 to allow the opton of dynamc allocaton/de-allocaton of the CQICH on a multpleburt ba]...0 CQICH Allocaton IE Format CQICH channel a defned n the UCD are dynamcally allocated and de-allocated to dfferent ung the CQICH_Alloc_IE(). The allocaton to a take effect on the ubequent UL frame untl a de-allocaton meage receved on the CQICH_Alloc_IE(). To allocate or de-allocated CQICH, the B hall tranmt UIUC wth the CQICH_Alloc_IE(). Table CQICH Alloc IE ynta ze Note CQICH_Alloc_IE () { Etended UIUC bt 00 Length bt Length n byte of followng feld Num_alloc or bt ytem parameter (depend on the number of CQICH upported by the ytem) For ( 0; <Num_alloc; ++) { CID bt bac CID CQICH_ID }} or bt Number of bt defned n the CQICH_Profle (ee ecton...) A CQICH_ID of all zero ndcate de-allocaton of a prevouly agned CQICH from the. When a receve the CQICH_ID of all zero, the hall top tranmttng on the currently agned CQICH on the ubequent UL frame and frame thereafter. [Add a new ecton... to ue CQICH_ID for DL burt agnment]... MIMO DL Enhanced IE format In the DL-MAP, a MIMO-enabled B may tranmt DIUC wth the MIMO_DL_Enhanced_IE() to ndcate the MIMO mode of the ubequent downlnk allocaton to a pecfc MIMO-enabled dentfed by the CQICH_ID prevouly agned to the. The MIMO mode ndcated n the MIMO_DL_Enhanced_IE() hall only apply to the ubequent downlnk allocaton untl the end of frame. Table - MIMO DL Enhanced IE ynta ze Note MIMO_DL_Enhanced_IE () { Etended DIUC bt 00 Length bt Length n byte Num_Agn bt

14 00-0- IEEE C0.d-0/ For ( 0; < Num_Agn; ++) { CQICH_ID or bt CQICH_ID to whch a agned OFDMA ymbol offet 0 bt ubchannel offet bt Bootng bt No. OFDMA ymbol bt No. ubchannel bt TC_Mode bt 0: TTD; : M mode ; : M mode If ((TC 0) (TC )) { DIUC } bt 0- burt profle ele { Num_layer bt for ( 0; <Num_layer; ++ ) { Layer_nde bt DIUC} bt }}} [Add a new ecton... for CQICH_Profle broadcat n UCD]... CQICH Profle The Table decrbe the CQICH Profle n the UCD meage. Table CQICH_Profle ynta ze Note Length of CQICH_ID feld bt 0: -bt CQICH_ID : -bt CQICH_ID Num_CQICH bt or bt for ( 0; < Num_CQICH; ++) { CQICH_ID bt or bt Duraton bt Reportng rate bt 00: Full rate CQI reportng 0: Half rate CQI reportng 0: quarter rate CQI reportng : / rate CQI reportng Offet bt In OFDMA lot (ee...) }