Ran1642 Hsdpa Mimo v10

HSDP HSD PA MIM MIMO O RAN 1642

HSDPA MIMO 28 Mbps

Background  Down!ink M"M# $M%!ti&!e $M%!ti&!e "n&%t M%!ti&!e #%t&%t' is a 3(PP re!ease 7 )a&a*i!it+  T,e -eat%re is *ased %&on t,e %se o- 2 transmit antenna at t,e Node  and 2 re)eie antenna at t,e U $down!ink 22 M"M#'

 Peak t,ro%,&%t )an *e do%*!ed w,en t,e U is in ood radio )onditions i.e. &eak t,ro%,&%t wit, 1456M and 1 )odes in)reases -rom 18 M*&s to 2 M*&s

 NSN -eat%re is *ased %&on sin!e %ser M"M# rat,er t,an m%!ti:%ser M"M#  Sin!e User M"M# )an swit), *etween two modes; Spatial Diversity (single stream) TB1 TB1

α 

TB1 Propagation Channel 

!mproves S"# at

%$Spatial Multiplexing (dual stream) TB1+TB2 

TB1 TB1 α TB2  TB2 

α 

Propagation Channel 

!mproves throughput at $%  

Requre!en"s $% #e&uirements  Re!ease 7 or newer   S%&&ort -or M"M# $in)!%des re,en %sin S&atia! M%!ti&!ein $d%a! stream' &rimar+ and se)ondar+ T are sent

 wei,ts w1 w2 w3 and w8 are a&&!i)a*!e  )ontri*%tions -rom *ot, trans&ort *!o)ks are sent -rom *ot, antenna  Same s&readin and s)ram*!in )odes are a&&!ied ea), T

 Di--erent ?P"?H transmitted -rom ea), antenna

 a), antenna sered *+ a di--erent &ower am&!i-ier $not s,own in -i%re'

MIMO +eg,"s  T,e U %ses t,e ?P"?H transmitted -rom ea), antenna to identi-+ t,e &re-erred wei,ts to maimise t,e areate trans&ort *!o)k siBe

 T,e U sina!s t,e &re-erred wei,ts %sin t,e Pre)odin ?ontro! "n-ormation $P?"' wit,in t,e HS:DP??H

Set 1

Set 2

Set 3

 "tCs on!+ ne)essar+ to sina!

Set 8

w1

w3

w2

w8

6 n te n n a 1

6 n te n n a 2

w2 *e)a%se w1 and w3 are -ied w,i!e w8 is )a!)%!ated -rom w2

 >ei,ts a&&!ied to ea), trans&ort *!o)k are ort,oona! to one anot,er 

Precodng -on"ro$ In.or!a"on %P-I&  U in-orms t,e Node  o- w,i), wei,ts s,o%!d *e %sed wit,in t,e HS:DP??H  w2 is sina!!ed as Pre)odin ?ontro! "n-ormation $P?"' ith M!M, T+&e 6 ?5"

T+&e  or  ?5" ),en 2 trans&ort *!o)ks are sent;

 ?,anne!isation )ode set $7 *its'  Mod%!ation s),eme and N%m*er o- T $3 *its'  Pre)odin >ei,t $2 *its'  Trans&ort *!o)k siBe -or &rimar+ T $4 *its'  Trans&ort *!o)k siBe -or se)ondar+ T $4 *its '  H+*rid 6R5 &ro)ess $8 *its'  Red%ndan)+ and )onste!!ation ersion -or t,e &rimar+ T $2 *its'  Red%ndan)+ and )onste!!ation ersion -or t,e s e)ondar+ T $2 *its'  U identit+ $14 *its'

Total o3 5 in3ormation -its 4oded to 126 -its

HSS--H -odng *pe ) %II&  Mod%!ation S),eme and N%m*er oTrans&ort !o)ks in-ormation is )oded a))ordin to t,e ta*!e *e!ow

 ?an ,ae di--erent mod%!ation s),emes -or ea), trans&ort *!o)k

-PI-H .or MIMO %1&  Di--erent ?P"?H are transmitted -rom ea), antenna w,en M"M# is %sed  An"enna 1 a!wa+s transmits t,e Primar+ ?P"?H  An"enna 2 )an transmit t,e Primar+ ?P"?H %sin t,e 6ntenna 2 mod%!ation &attern $%ses same s)ram*!in and ),anne!isation )odes as 6ntenna 1' O p "

o n

1

OR

 An"enna 2 )an transmit a Se)ondar+ ?P"?H  Se)ondar+ ?P"?H %ses Primar+ or Se)ondar+ S)ram*!in )ode *%t a di--erent S=24 ),anne!isation )ode $antenna 1 mod%!ation &attern is %sed'

"

O p o n 2

-PI-H .or MIMO %2&  T,e -irst ?P"?H o&tion is %sed -or S&a)e Time Transmit Diersit+ $STTD'  STTD is not s%&&orted *+ NSN  Pra)ti)a! e&erien)e ,as demonstrated t,at HSDP6 U wit, adan)ed re)eiers ,ae &oor &er-orman)e w,en STTD is a)tie wit,in t,e )e!!

 t,ro%,&%t !oss o- %& to 80 L  NSN im&!ementation is *ased %&on t,e se)ond ?P"?H o&tion  T,e draw*a)k asso)iated wit, t,e se)ond o&tion is t,at non:M"M# transmissions are on!+ transmitted *+ t,e -irst P6/antenna

 non:M"M# transmissions re,en a)tie re)ommended a!%e is  s

MIMO HSPA -apab$" based Hando5er %II&  T,e M"M# ersion o- t,e -eat%re re&!a)es t,e non:M"M# ersion o- t,e -eat%re  "- t,e M!M,SDP:Capa, &arameter is set to Qna*!edC t,en t,e non:M"M# ersion o- t,e -eat%re is disa*!ed $&eriodi) and eent triered as&e)ts'

 T,e M"M# ersion o- t,e -eat%re re