9k alarms&pm&tandem

23
© Alcatel University - 8AS 90200 0551 VT ZZA Ed.01 9.1 9 Alarm and Error Handling

Upload: api-3859483

Post on 11-Apr-2015

399 views

Category:

Documents


4 download

DESCRIPTION

SDH ALARM PPT

TRANSCRIPT

Page 1: 9k Alarms&PM&Tandem

© Alcatel University - 8AS 90200 0551 VT ZZA Ed.01 9.1

9 Alarm and Error Handling

Page 2: 9k Alarms&PM&Tandem

9.2

9 Alarm and Error HandlingSession presentation

Objective: to be able to describe the way the alarms are managed in an SDH network

program: 9.1 Communication Alarms 9.2 Alarm Indication Signal : AIS 9.3 Remote Defect Indication : RDI 9.4 Alarm and Error Processing within an NE 9.5 Explanation of Alarm and Error Codes 9.6 Alarm and Error Processing 9.7 Performance Monitoring : PM 9.8 Tandem Connections

Page 3: 9k Alarms&PM&Tandem

9.3

9 Alarm and Error Handling Communication Alarms

SDH-Network

ADMMSNDXC

ADMMSNDXC

RegeneratorADMMSNDXC

PDH140Mbit/s

PDH2 Mbit/s

Page 4: 9k Alarms&PM&Tandem

9.4

9 Alarm and Error Handling Alarm Indication Signal - AIS

RSOH

1 1

1 1

1

1

1

1

1

1

MS - AIS

AU - AIS

TU – AIS

RSOH

1 1

1

1

1

1

1

1MSOH

RSOH

MSOH

AU-PointerPOH

111

1

1

Page 5: 9k Alarms&PM&Tandem

9.5

9 Alarm and Error Handling Remote Defect Indication - RDI

HP-RDI

8...1

1

LP-RDI

8...1

1

MS-RDI

8...1

011 K2-Byte

G1-Byte

V5-Byte

K2

G1

V5

Page 6: 9k Alarms&PM&Tandem

9.6

9 Alarm and Error Handling Alarm and Error Processing within a NE

LOF

RS-TIM

RS-BIP

MS-AIS

MS-BIP

MS-REI

AU-AIS

AU-LOP

HP-UNEQ

HP-TIM

HP-BIP

HP-REI

HP-RDI

TU-AIS

TU-LOP

TU-LOM

TU-PLM

TU-AIS

TU-AIS

AU-AIS

MS-AIS

C2

H4

G1

G1

B3

J1

C2

K2

M1

B2

K2

B1

J0

A1/A2

LOS

MS-RDI

Detection

Generation

LP-TIM

LP-BIP

LP-REI

LP-RDIPDH-AIS

TU-AIS

V5

V5

V5

V5

J2

V5

LP-PLM

PhysicalSection Layer

RegeneratorSection Layer

MultiplexSection Layer

Higher Order Path Layer

Lower Order Path Layer

Page 7: 9k Alarms&PM&Tandem

9.7

Page 8: 9k Alarms&PM&Tandem

9.8

9 Alarm and Error Handling Example Network

SDH-Network

ADMMSNDXC

ADMMSNDXC

RegeneratorADMMSNDXC

PDH140Mbit/s

PDH2 Mbit/s

Regenerator Section Regenerator Section

Multiplex SectionMultiplex Section

Trail / Path

Regenerator Section

Page 9: 9k Alarms&PM&Tandem

9.9

9 Alarm and Error Handling Alarm and Error Processing in a Regenerator

MS-AISLOS

LOF

RS-TIM

RS-BIP

MS-AIS

(PM)

RS

1 / MS

1

RS

1

OS

1 / R

S1

OS

1

RS

1 / MS

1

RS

1

OS

1 / R

S1

OS

1

Detection

Generation

RSOH

1 1

1 1

1

1

1

1

1

1

Page 10: 9k Alarms&PM&Tandem

9.10

9 Alarm and Error Handling Alarm and Error Processing in a Multiplexer: VC-4 Passthrough

S4

MS

1 / S4

MS

1

RS

1 / MS

1

RS

1

OS

1 / R

S1

OS

1

MS

1 / S4

MS

1

RS

1 / MS

1

RS

1

OS

1 / R

S1

OS

1

LOS

LOF

RS-TIM

RS-BIP

MS-AIS

MS-BIP

MS-REI

MS-RDI

MS-AIS

AU-AIS

(PM)

AU-AIS

(PM)

Detection

Generation

(PM)

RSOH

1 1

1

1

1

1

1

1MSOH

Page 11: 9k Alarms&PM&Tandem

9.11

9 Alarm and Error Handling Alarm and Error Processing in a Multiplexer: VC-4 Termination

S4

MS

1 / S4

MS

1

AU-AISAU-LOP

HP-UNEQHP-TIMHP-BIPHP-REIHP-RDI

AU-AIS

TU-AIS

TU-AIS

S4

TU-AIS(PM)

Detection

Generation

(PM)

S12

S4 / S

12

RSOH

MSOH

AU-PointerPOH

111

1

1

Page 12: 9k Alarms&PM&Tandem

9.12

9 Alarm and Error Handling Alarm Processing via a complete Network: Path fault

NE A NE B NE C

NE D

Reg. EReg. F

LO-passthrough HO-passthrough

LOS

2Mbit/s

Page 13: 9k Alarms&PM&Tandem

9.13

9 Alarm and Error Handling Alarm Processing via a complete Network: Reference fault

NE A NE B NE C

NE D

Reg. EReg. F

LO-passthrough HO-passthrough

LOS

2Mbit/s

Page 14: 9k Alarms&PM&Tandem

9.14

9 Alarm and Error Handling PM Basics

Error checksum Block sizemax. number of

block errors per second

B1 (RSOH) STM-N 8.000

B2 (MSOH) 801 bits * N 192.000 * N (STM-N)

B3 (HP-POH) VC-4VC-3

8.000

8.000V5 (LP-POH) VC-12 Multiframe 2.000

Page 15: 9k Alarms&PM&Tandem

9.15

9 Alarm and Error Handling Principles of data collection

Monitored seconds

Defects ?

Anomalies ?

% EB >= 30 ?

cES = cES + 1 cES = cES + 1

cBBE = cBBE + EB(s) cSES = cSES + 1

End

Yes

Yes

Yes

No

No

No

Extracted from G 826

Page 16: 9k Alarms&PM&Tandem

9.16

9 Alarm and Error Handling Definition of Unavailability

SESES which is not a SESNon errored second

10 sec < 10 sec 10 sec< 10 sec

t in sec

End of detection:

ES := ES + x SES := SES UAS := UAS - 10

Begin of detection:

ES := ES - 10 SES := SES - 10 UAS := UAS + 10

Unavailable Time (UAT)

Inhibition of counters:ES / SES / (BBE)

Available Time

x

Page 17: 9k Alarms&PM&Tandem

9.17

9 Alarm and Error Handling Near End / Far End counters

NE A

STM-N with errors

Far End Counters:

FEBBEFEESFESESFEUAS

Near End Counters:

BBEESSESUAS

STM-N with REI

NE B

Page 18: 9k Alarms&PM&Tandem

9.18

9 Alarm and Error Handling Why Tandem Connections

[total biterrors]

PathSink

PathSource

Near end bit errors counted by path monitor (PM) [location]

Bit errors added before domain 1

Bit errors added in domain 1

Bit errors added between domain 1 and domain 2

Bit errors added in domain 2

Domain 1 Domain 2

VCn-Path

Inter DomainLink

Page 19: 9k Alarms&PM&Tandem

9.19

9 Alarm and Error Handling Function of Tandem Connections

VCn-Path

Near end bit errors counted by Tandem Connections (TC)

skso

TC 1

so sk

TC 12

PathSink

PathSource

Domain 1 Domain 2Inter Domain

Link

skso

TC 2

so: sourcesk: sink

[location]

[total biterrors]

Page 20: 9k Alarms&PM&Tandem

9.20

9 Alarm and Error Handling Overhead Bytes used for Tandem Connections

REI OEI

PayloadG1F2H4F3K3N1

C2B3J1

Virtual Container (VC-4, VC-3)

Number of bit errors detected by TC source

frame 1-8: FASframe 9-72: 64*2 Bit= 16Byte TC-TIframe 73: TC-RDIframe 74: ODIframe 75,76: all ‘0’

N1 used for TCs

1 2 3 4 5 7 86

Page 21: 9k Alarms&PM&Tandem

9.21

9 Alarm and Error Handling Tandem Connection Termination: TCT

SDH portSDH port

Path

Path

Domain 1

N1=0 N1=0

N1=0 N1=0

BBE = 2N1:=2

NE 1

SPIRSTMSTMSA

BBE = 6N1 = 2

NE_BBE := 6 - 2 =4

NE x

TC 1 (Egressing Tandem Connection)

TC after Matrix

TC afterMatrix

SPIRSTMSTMSA

SPIRSTMSTMSA

SPIRSTMSTMSA

Page 22: 9k Alarms&PM&Tandem

9.22

9 Alarm and Error Handling Tandem Connection Monitoring: TCM

SPIRSTMSTMSAPath

SDH Port

TCmRX

Before Matrix

TC

SDH Port

TCmTX

After Matrix

SPIRSTMSTMSA

Page 23: 9k Alarms&PM&Tandem

9.23

Thank you for answering the self-assessment

of the objectives sheet

9 Alarm and Error Handling Evaluation

Objective: to be able to describe the way the alarms are managed in an SDH network