Flexi Multiradio LTE BTS Basic Troubleshooting
Short Description
Flexi Multiradio LTE BTS Basic Troubleshooting...
Description
1
- interface
Source: SC(# link for E2 interface. (he trans,ort ,ath SC(# for connection to an adFacent 8(S has 4roken. (he reason for this can 4e an un,lugged ca4le to the adFacent 8(S. No trans,ort ,ath availa4le to ,ursue o,eration on the fault! connection with the adFacent 8(S.
12
Failure in optical 60# interface
6irt! or 4roken o,tical ca4les and5or S&#s or wrong S&# inserted either in &S+ or &%+ are main causes for %#3 alarm.
13
5nit bloc2ed $ F6
8lock5Ln4lock will reset the unit.
17
odule in Configuring State
Ln4locked unit in configuring state. Alarm Lnit 4lockedD is still active.
1=
!loc2/5nbloc2 !TS
8lock5Ln4lock 8(S will reset the 8(S. (%S shall N( 4e reset.
1
6eset Site
%eset Site will reset 4oth 8(S and (%S.
1B
e1! connection to i3S" $0lane 8379 lin2
(wo i+Ss can 4e configured in eN8 #rimar! and Secondar!. Sec ondar!. No alarm is raised in 8(S Site +anager in case eN8 is disconnected from i+S. "owever; "owever; the link from NetAct NetA ct to eN8 through i+S is 4roken.
1/
Failure in connection between !TS and i3S or #rd party tool
Check connectivit! to the 3rd ,art! tool if used for e.g. for su4scri4er trace.
1J
'T0$5 0ath Failure alarm
*(#$L ,ath su,ervision is o,tional feature.
Network element did not res,ond to the *(#$L: )cho %eGuest message within time.
20
'T0$5 0ath Failure alarm A continued Check *(#$L ,ath configuration and # addreess of the S*9 in the Commissioning 9iard. f *(#$L su,ervision is set to the value different than ero su,ervision is switched on. (he *(#$L o4Fect ma! not e-ist in the 8(S configuration.
21
S*9 # address set *(#L o4Fect is not affecting user ,lane traffic.
VSW6 alarm V oltage S tanding W ave R atio VSWR ndicates the amount of %& ,ower in reverse direction; 4eing reflected from fault! com,onents in the antenna s!stem. t is used as a measure of im,edance mismatch 4etween %& +odules5%%"s transmit ,ath and its load.
(here are two MS9% alarm severities: MS9% +inor: a,,ears when the MS9% +inor threshold is e-eeded default 1.J. MS9% Critical: a,,ears when the MS9% +aFor threshold is e-eeded default 2.. all cells related to the fault! antenna line will 4e 4locked. #ossi4le conseGuences; de,ending on the 8(S configuration: %adio resources switched offD and (E failure in ++D are conseGuences of the MS9% alarm.
22
!loc2 Cell
23
!loc2 Cell $ continued
7dministrati&e state of the cell and !loc2ing state are not the same.
eN8 is onl! ntegrated 4ut not on Air as none of the configured cells is o,erational. Signaling link to ++) is active. 27
Change Cell 7dministrati&e State
Cell Administrative state can 4e either: unlocked shutting down locked
2=
Cell 7dministrati&e State A shutting down
Cell final state is $ Locked
2
40 Connecti&ity Test
# Connectivit! (est Sco,e
n case of multi,le # interfaces M'ANs configured in the eNode8; onl! an a,,ro,riate Source address can reach its destination 2B
Sa&e !TS snapshot
8(S Sna,shot files are useful for trou4leshooting ,ur,oses.
2/
LTE 0erformance easurements
'rouped reporting 6adio 7ccess counters and their B04s
*rou, /---
SA) *9 + /001 + /007 + /011 + /012 + /01/ 'oad measurements
++)
S1 signalling
eN8 '() CellOs
+ /00J + /013 + /017 + /01= +o4ilit!5" 2J
+ /000 + /00 + /00B + /00/ Access5dro,
eN8 )**= )*(* 7ir interface DoS
Capacity areas
easurement areas within 1W architecture
30
)*() e1ode! Load easurements+SS 1umber of 5E e1! obility See chapter . )**( Cell Load easurements anagem )*(( Cell 6esource ent Entity S.a easurement E >)*(- Cell Throughput E $ easurements ( S )*-* Cell 7&ailability easurements S($5 )**= 5L 0ower and Duality LTE$5u easurements Ser&ing E&ol&ed )*(* :L 0ower and Duality 'ateway 1ode ! LTE$5E easurements 8e1!9 )*** S(70 easurements )** Transport easurements :ata &olume on >S( setup Throughput on >1umber of S( connections See chapter See chapter ;
Capacity areas
Cell specific measurements SAE GW
)**( Cell Load easurements )*(( Cell 6esource easurement )*(- Cell Throughput easurements )*-* Cell 7&ailability easurements M 8001 Cell Load "acket scedulin! Traffic measurements )**=related 5L 0ower and Duality easurements Traffic M 8012 SDU/MAC Cell trou!"ut )*(* M:L 0ower and Duality 8011 #R$ utilisation Cell resource Traffic "er %%& easurements cell
31
> -
cell cell
Capacity areas 6esource bloc2s ? physical C+ allocation 8:L9 = 6!s allocat ed to 5Ea s r e i r r a c % b + u 2 s * ) - ( ( P
; &6+ s!m4olsQ 12 su4carriers
( 6! allocated to 5Eb
32
)*(( Cell 6esource easurements 7llocation of physical resource bloc2s 8:L9
Resource $lock (R$)
Resource 'lement
Call Setup 3&er&iew Core/4
5E
e e & i t s a c h a p o t C e l 6 6 d 4
0hysical 6andom 7ccess Channel
E$1ode !
E
067C+ preamble
T7, scheduling, 4: 66C connection reGuest 66C connection setup 66C connection setup complete
17S ser&ice reGuest encapsulated in p 66C connection setup complete u t
e e s Security chec2/command encapsulated s e a c h 66C connection reconfiguration i & 66C connection r p e S s 7 6econfiguration complete 1 ? S40 in&ite l l a C
in
S40 3B / ringing
33
S1
First B04 8li2e for WC:79 66C setup success
connection ser&ice Connection setup reGuest
S40 session process
Terminating 5E
66C Connection Setup 3&er&iew 80ositi&e9 5E e s a h p C 6 6 e & i t c a o t e l d 4 e s a h p S 7 1 37
E$1ode !
(
-
#
RRCConnectionRe*uest
RRCConnectionSetu"
RRCConnectionSetu"Com"lete 8with encapsulated 17S message9
S1 E
•
)*(#C(;"S4'1HC311HEST7!H7TTH3HS
•
)*(#C()"S4'1HC311HEST7!H7TTHT
•
)*(#C("S4'1HC311HEST7!H7TTH3H:
•
)*(#C-*"S4'1HC311HEST7!H7TTH3T+E6S
•
)*(#C-("S4'1HC311HEST7!H7TTHE'
)**;C;" S6!( setup attempts
)**;C)" S6!( setup completions )*(#C=" Signaling connection establishment completions
)**; 6adio !earer easurements )*(# 5E State easurements
66C Connection Setup 3&er&iew 80ositi&e9 5E e s a h p C 6 6 e & i t c a o t e l d 4 e s a h p S 7 1 3=
E$1ode !
(
-
#
RRCConnectionRe*uest
RRCConnectionSetu"
RRCConnectionSetu"Com"lete 8with encapsulated 17S message9
S1 E
•
)*(#C(;"S4'1HC311HEST7!H7TTH3HS
•
)*(#C()"S4'1HC311HEST7!H7TTHT
•
)*(#C("S4'1HC311HEST7!H7TTH3H:
•
)*(#C-*"S4'1HC311HEST7!H7TTH3T+E6S
•
)*(#C-("S4'1HC311HEST7!H7TTHE'
)**;C;" S6!( setup attempts
66C Connection 6eGuest 81egati&e9
5E E$1ode !
S1 E
RRCConnectionRe*uest ( 67C accepts or re@ects 66C Connection 6eGuest -
3
RRCConnectionRe+ect
)*(#C) Signaling connection establishment failures due to re@ection by 66 67C 5E stays in 4dle ode
66C Connection Setup 81egati&e9
5E
(
RRCConnectionRe*uest
-
RRCConnectionSetu"
#
3B
e1 !
Missin! RRCConnectionSetu"Com"lete
E
)*(#C. Signaling connection establishment failures due 66C setup completions missing :oes 13T trigger )**;C/C(- II 5E stays in 4dle ode
66C Connection Setup 81egati&e9
5E
(
RRCConnectionRe*uest
-
RRCConnectionSetu"
#
3/
e1!
'rreneous or &ncom"lete RRCConnectionSetu"Com"lete
E
)*(#C; Signaling connection establishment failures due 66C setup completions error Triggers also )**;C/C(S6!(/- setup failures 5E stays in 4dle ode
66C Connection Setup Counter Summary
)*(#C) )*(#C. )**;C/C()*(#C;
)**;C;/C(*
3J
)**;C)/C(( )*(#C=
6e@ections by issing/wrong completions 66 67C Setup attempts Successful setups
7t least" from all attempts K (** , Success setu" ratio minus re@ects J )**;C)/(( )**;C;/(*9
66C Connection Setup B04s E$5T671 66C Connection Setup Success 6atio Shows the setup success ratio for the elementary procedure O66C connection establishmentO used to set up a radio connection from 5E to e1!
Logical formula 6CC Con SS6 J 866C connection setup completions / 66C connection reGuests9 K (**
70
Summari%ation formula 804 4:9
Summari%ation formula 87bbre&iation9 (** K sum 8MS4'1HC311HEST7!HC30N9 / sum 8MS4'1HC311HEST7!H7TTH3HSN< MS4'1HC311HEST7!H7TTHTN< MS4'1HC311HEST7!H7TTH3H:N< MS4'1HC311HEST7!H7TTH3T+E6SN9
S7E !earer 7rchitecture •
•
SA) 8earer s,ans the com,lete network; from L) over )L(%AN and )#S u, to the connector of the e-ternal #6N. (he SA) 4earer is associated with a Gualit! of service RoS usuall! e-,ressed 4! a la4el or RoS Class dentifier RC. '()$Lu
eN8 S1$L
Serving *atewa!
S=
#6N *atewa!
cell
Sgi
#6N
)nd$to$)nd Service )-ternal 8earer Service
SA) 8earer Service )#S 8earer SA) %adio 8earer Service SA) %8
SA) Access 8earer Service
#h!sic al %adio 8earer Serv ic e
S1 #h!s ic al 8earer Service
)$L(%AN 71
S=5S/ 8earer Service
)#C
#6N
7ttach 0rocedure 80ositi&e9
5E
e1 6andom 7ccess !
E
S' W
0' W
+S S
procedure RRCConnectionSetu"Com"lete 8E" 7ttach 6eGuest, ES" 0:1 Connecti&ity 6eGuest9 &ntialU'Messa!e 8E" 7ttach 6eGuest, ES" 0:1 Connecti&ity 6eGuest9 E identity chec2 procedure 7uthentication / Security
E identity chec2 procedure 7uthentication / Security Location updating CreateSessionRe*uest ;PSession creation CreateSessionRens"onse
72
E46
7ttach 0rocedure 80ositi&e9
5E
e1!
E
&nitialConte-tSetu"Re*uest
S'W
0'W
+SS
)***C* 4nitial context setup reGuests )**.C* E0S bearer setup attempts
8E" 7ttach 7ccept, ES" 7cti&ate :efault E0S !earer Context 6eGuest9 )**;C* :ata 6! setup attempts )**;C(*" S6!- setup attempts
RRCConnectionRecon.i!uration
8E" 7ttach 7ccept, ES" 7cti&ate :efault E0S !earer Context 6eGuest 9 RRCConnectionRecon.i!urationCom"l ete &nitialConte-tSetu"Res"onse
)**;C( :ata 6! setup completions )**;C((" S6!- SET50 S5CC
)***C( 4nitial context setup completions )**.C( E0S bearer setup completions
UL&n.ormation%rans. er 8E" 7ttach Complete, ES" 7cti&ate :efault E0S !earer Context Complete9
U"linkAS%rans" ort 8E" 7ttach Complete, ES" 7cti&ate :efault E0S !earer Context Complete9 First 5plin2 :ata Modi. $earer Re*uest
73
Modi. $earer Res"onse First :ownlin2 :ata
)*** S( 70 easurements" e1 )**. E0S !earer easurement )**; 6adio !earer easureme
7ttach 0rocedure 80ositi&e9
5E
e1!
E
&nitialConte-tSetu"Re*uest
S'W
0'W
)***C* 4nitial context setup reGuests )**.C* E0S bearer setup attempts
8E" 7ttach 7ccept, ES" 7cti&ate :efault E0S !earer Context 6eGuest9 RRCConnectionRecon.i!uration
)**;C* :ata 6! setup attempts )**;C(*" S6!- setup attempts
8E" 7ttach 7ccept, ES" 7cti&ate :efault E0S !earer Context 6eGuest 9 RRCConnectionRecon.i!urationCom"l ete &nitialConte-tSetu"Res"onse
77
)**;C( :ata 6! setup completions )**;C((" S6!- SET50 complete
+SS
17S Ser&ice 6eGuest 81egati&e9
5E
e1!
E &nitialConte-tSetu"ailure or o res"onse .rom MM'
S'W
0'W
)***C) S( setup failure no response from E )***C S( setup failure indicated by E
7=
+SS
17S Ser&ice 6eGuest 81egati&e9
5E
e1!
E
S'W
&nitialConte-tSetu"Re*uest
RRCConnectionRecon.i!uration
RRCConnectionRecon.i!urationailure
7
)**;C:ata bearer setup failure
0'W
+SS
17S Ser&ice 6eGuest 81egati&e9
5E
e1!
E &nitialConte-tSetu"Re*uest
RRCConnectionRecon.i!uration
S'W
)***C-/C#/C/C= 4nitial context setup failure due to •
RRCConnectionRecon.i!urationCom"l ete &nitialConte-tSetu"Res"on se (it .ailure cause)
0'W
•
6adio networ2 layer Transport layer
•
6esource reasons
•
3ther reasons
)**.C-/C#/C/C= E0S bearer setup failure due to •
•
7B
6adio networ2 layer Transport layer
•
6esource reasons
•
3ther reasons
+SS
S( Setup 0rocedure
eN8 )***C." S( Setup attempt
++) S1A#: S1 S)(L# %)RL)S( eN8 glo4al 6; eN8 name; su,,orted (As and #aging 6%E configuration
SC(#: SAC )***C;" S( Setup complete
S1A#: S1 S)(L# %)S#NS) Served*L++); %elative ++) ca,acit!
SC(#: SAC
*L++): *lo4all! LniGue ++) dentit! (A: (racking Area 6%E: 6iscontinue %ece,tion 7/
S( Setup Counter Summary
)***C) )***C.
S( setup attempts
7J
)***C;
S( setup failures / completions
)***C
LTE >-70 8)*--9 1ew in 6L#* 4t pro&ides measurements related to >- Setup procedureP The counters are updated at the originating e1! site
eN81 )*--C*" >- setup attempt
E2 Setu, #rocedure: #ositive E2A#: E2 S)(L# %)RL)S(
E2A#: E2 S)(L# %)S#NS)
=0
eN82
LTE >-70 8)*--9 4t pro&ides measurements related to >- Setup procedureP The counters are updated at the originating e1! site
eN81 )*--C*" >- setup attempt
E2 Setu, #rocedure: Negative E2A#: E2 S)(L# %)RL)S(
E2A#: E2 S)(L# &A'L%) )*--C(" >- setup failure
message or e-,iration of (imer wait for E2 S)(L# %)S#NS) 3*## (S 3.723
=1
eN82
:ata 6adio !earer Setup Counter Summary
)**;C-
)**;C*
)**;C(
:ata bearer :ata bearer setup attempts setup failures / completions
=2
+ando&er Types LTE
other 67T intersystem +3 triggered by other 67T
E$5T671 macro cell
intersystem +3 triggered by ePgP co&erage of E$5TS ser&ice load 4nter freGuency +3 -
-
-
E$5T671 micro cells
4ntra$freGuency +3 8intra e1!9 =3
intra$freGuency +3 8inter e1!, inter E9
+ando&er 0rocedure
$Q Lossless 0ac2ets are forwarded from the source to the target $Q 1etwor2$controlled Target cell is selected by the networ2, not by the 5E +ando&er control in E$5T671 8not in pac2et core9 $Q 5E$assisted easurements are made and reported by the 5E to the networ2 $Q Late path switch 3nly once the hando&er is successful, the pac2et core is in&ol&ed
=7
+ando&er 0rocedure !efore hando&er S$'W < 0$'W E
Sourc e e1!
+ando&er preparation S$'W < 0$ 'W E
Target e1!
J :ata in radio J Signalling in radio J 'T0 tunnel ==
J 'T0 signalling
6adio hando&er S$'W < 0$'W E
>-
J S( signalling J >- signalling
Late path switching S$'W < 0$'W E
4ntra e1ode! +ando&er 80ositi&e9
5E
Target Source e1! Control e1! RRC Measurement UL/DL Data (source cell) L2 UL Allocation RRC Measurement Re"orts +ando&er decision 7dmission control and resources allocation on target cell L2 DL Allocation RRC Connection Recon.i!uration L2 Sncroni3ation
=
L2 UL Allocation 4 timin! advance RRC Connection 6elease source Recon.i!uration Com"lete resources
E
S' W
)** 4ntra e1ode! +ando&er easur 3n le&el of source cell +ando&er decision )**C( Total hando&er decisions +ando&er preparation )**C- 7ttempted intra e1ode! hando&er preparations
+ando&er Execution )**C. 7ttempted intra e1ode! hando&ers
+ando&er completion )**C; Successful intra e1ode! hando&ers
( a rd c o )
d e d ll
% 5 6 o v e ra r
m e
4ntra e1ode! +ando&er 81egati&e9
5E
Target Source e1! Control e1! RRC Measurement UL/DL Data (source cell)
E
L2 UL Allocation RRC Measurement Re"orts +ando&er decision
=B
)**C* Total not started +3 preparations
S' W
4ntra e1ode! +ando&er 81egati&e9
5E
Target Source e1! Control e1! RRC Measurement UL/DL Data (source cell)
E
L2 UL Allocation RRC Measurement Re"orts +ando&er decision 7dmission control and resources allocation on target cell
)**C#" Failed intra e1ode! +3 preparations due to admission control 8internal e1! trigger9 )**C=" Failed intra e1ode! +3 preparations due to other reason
=/
S' W
4ntra e1ode! +ando&er 81egati&e9
5E
Target Source e1! Control e1! RRC Measurement UL/DL Data (source cell)
E
S' W
L2 UL Allocation RRC Measurement Re"orts +ando&er decision 7dmission control and resources allocation on target cell L2 DL Allocation RRC Connection Recon.i!uration L2 Sncroni3ation missin!
RRC Connection Recon.i!uration 'rror or missin! =J
+/00JC12: ntra eN8 " dro,s due to %' failure +/00JC13: ntra eN8 " dro,s due to other failure )**C) Total intra e1ode! +3 failures due to timer T+3o&erall expires
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