Lte Basic Rf

8/9/2019 Lte Basic Rf

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LTE Drive Test Procedure for

SSV Using TEMS



Coverage Test

• The objective of this test is to check if there's swapped feedersand if the adio Units and !ntennae are radiating as supposedto be"

• # near the site we shou$d receive #%& and the P( shou$d be asp$anned"

• # the test is done b) driving a$$ the roads around the sites in id$e*ode + just p$ugging in the data card and *ake sure it isca*ped on LTE without doing an) kind of browsing or down$oad,

• # on Te*s )ou shou$d *onitor the *ap and the radio $eve$s+ SP- S.- S(/- P(, 000 windows on Te*s 1 LTE Serving

2/eighbor e$$"• Note: you activate the card and when ur in idle mode n u

can see the signals>> u start logging and then drive andwhen u fnish driving u stop logging.



Coverage Test radioparamters



Handover Test

• 34 test is done in dedicated *ode 00 connecting to 5$e6i$$a anddown$oading big 5$e and driving

• The objective is to know if the 34 is working between the 7 sectors of thesite"

• 00 drive c$ockwise and counterc$ockwise around the site and near- and

*onitor that the P( is changing fro* one sector• 000 windows on Te*s 1 LTE Serving 2/eighbor e$$ and another 8indows

Events"

• !nother drive is needed to check the 34 to neighbor site"• 9ust check one neighbor per ce$$ to conduct a 34 test and vice versa"• /eighbors are chosen based on avai$abi$it)• (f theres huawei and ericsson sites as neighbors two tests shou$d be done

• Note: you activate the card and and u start downloading big flerom Fileilla when ur in connected mode n u can see the signalsand download wor!ing>> u start logging and then u drive andwhen u fnish driving u stop logging.



Throughput test•

:or each ce$$ we shou$d do 7 DL test and 7 UL Test00 for a site 00;< tests 00 ;< $og 5$es• The throughput test is a static test00 no drive 00

just 5nd a $ocation in front of the sector whereradio conditions are the best + S(/00==2=>-SP00 #%&2#%>,

• !nd do the tests for each sector in the $ocation

chosen

• During test )ou *ake sure )ou are a$wa)s ca*pingon sa*e P( + the one of the sector, 00 000windows on Te*s 1 LTE Serving 2/eighbor e$$

• !nd *ake sure that *ost of the ti*e thattrans*ission *ode is 7 + M(M4,-

•

(?=- TS&; and T@S&= is AB.!M during DL forPDS3 Modu$ation and PUS3 *odu$ation is ;A.!M during UL test" 00 8indows in Te*s 1 LTEradio para*ters



DL C UL Throughput test

• :or DL and UL tests- the) shou$d be done using :i$e6i$$a andconnecting to the :TP server and down$oading ;& big 5$es forDL and ;& big 5$es for UL"

• 8hi$e *onitoring the throughput through netpersec and takesnapshot when we reach the target"

• :or =A&& sites 1 target 1 average throughput DL? A& Mbpsand for UL ? 7& Mbps

• :or ;<&& sites1 target 1 throughput DL? 7& Mbps and for UL? ;> Mbps

• U shou$d do the 5$e transfer and when its stab$e on the highthroughput start $ogging for = *in"

• (n tota$ )ou shu$d have ;< $og 5$es per site and ;< snapshots"





Latenc) +"TT time# test

• 4pen co**and pro*pt fro* windowsand ping the ip address of the :TPserver on sa*e $ocation u where

doing the throughput test and takesnapshot of the b$ck window"

• 8e do it once per sector

• ind$) note that before pinging start$ogging and after pinging stop $ogging



$T% "F conditionsclassifcation

(t is co**on sense that the perfor*ance of an) wire$ess s)ste* has adirect re$ationship with the : conditions at the ti*e" To aid withperfor*ance ana$)sis then- we t)pica$$) de5ne so*e ranges of :*easure*ents that correspond to so*e t)pica$ : conditions one *ight5nd the*se$ves in"

8hen it co*es to LTE- ( ca*e across the above tab$e that presents agood c$assi5cation" The source of this tab$e is a EUT!/ vendor and hasbeen co*p$ied during the : tuning process for a *ajor US operator" 4fcourse there are no ru$es as to how various : conditions are c$assi5ed-so dierent tab$es wi$$ eFist but to a great eFtent )ou can eFpect the* to

a$ign"



(n this particu$ar eFa*p$e- three *easure*ent Guantities are used"SP +eference Signa$ eceived Power,- S. +eference Signa$eceived .ua$it), and S(/ +Signa$ to (nterference C /oise atio,"

SP is a *easure of signa$ strength" (t is of *ost i*portance as itused b) the UE for the ce$$ se$ection and rese$ection process and isreported to the network to aid in the handover procedure" :or thoseused to working in UMTS 8DM! it is eGuiva$ent to P(3 SP"

The 7IPP spec description is "The RSRP (Reference Signal ReceivedPower) is determined for a considered cell as the linear average overthe power contributions (Watts) of the resource elements that carrycell specic Reference Signals within the considered measurementfre!uency bandwidth"

(n si*p$e ter*s the eference Signa$ +S, is *apped to esourceE$e*ents +E," This *apping fo$$ows a speci5c pattern +see be$ow," Soat an) point in ti*e the UE wi$$ *easure a$$ the Es that carr) the Sand average the *easure*ents to obtain an SP reading"



S. is a *easure of signa$ Gua$it)" (t is *easured b) the UE and reportedback to the network to aid in the handover procedure" :or those used toworking in UMTS 8DM! is it eGuiva$ent to P(3 Ec2/&" Un$ike UTMS

8DM! though it is not used for the process of ce$$ se$ection andrese$ection +at $east in the e$&< version of the specs,"

The 7IPP spec description is "RSR# (Reference Signal Received #uality) isdened as the ratio$ %&RSRP'( *TR+ carrier RSS,) where % is the numberof Resource -loc.s of the *TR+ carrier RSS, measurement bandwidth"



The new ter* that appears here is SS( +eceived Signa$ Strength(ndicator," SS( is eective$) a *easure*ent of a$$ of the powercontained in the app$icab$e spectru* +;"B- 7- >- ;&- ;> or =&M36," Thiscou$d be signa$s- contro$ channe$s- data channe$s- adjacent ce$$ power-

background noise- ever)thing" !s SS( app$ies to the who$e spectru*we need to *u$tip$e the SP *easure*ent b) / +the nu*ber ofresource b$ocks, which eective$) app$ies the SP *easure*entacross the who$e spectru* and a$$ows us to co*pare the two"

:ina$$) S(/ is a *easure of signa$ Gua$it) as we$$" Un$ike S.- it is not

de5ned in the 7IPP specs but de5ned b) the UE vendor" (t is notreported to the network" S(/ is used a $ot b) operators- and the LTEindustr) in genera$- as it better Guanti5es the re$ationship between :conditions and throughput" UEs t)pica$$) use S(/ to ca$cu$ate the .(+hanne$ .ua$it) (ndicator, the) report to the network"

The co*ponents of the S(/ ca$cu$ation can be de5ned as1

S1 indicates the power of *easured usab$e signa$s" eference signa$s+S, and ph)sica$ down$ink shared channe$s +PDS3s, are *ain$)invo$ved

(1 indicates the power of *easured signa$s or channe$ interferencesigna$s fro* other ce$$s in the current s)ste*



/1 indicates background noise- which is re$ated to *easure*entbandwidths and receiver noise coeJcients

So that is itK ( have a$so inc$uded a rea$ $ife *easure*ent fro* a Sierra

8ire$ess card that inc$udes the above *entioned *etrics so )ou can seewhat is the t)pica$ output fro* a UE" Using that and the tab$e above )oushou$d be ab$e to deduce the : condition categor) it is in at the ti*e of*easure*ent"



Lte Basic Rf

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