g lii 304 traffic statistics analysis 20080421 a 2.0

8/13/2019 G LII 304 Traffic Statistics Analysis 20080421 a 2.0

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HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level:2013/12/11

Traffic Analysis


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Content

KPI introduction Traffic item introduction Outline of analysis


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3

Where

KPIs per cell and KPIs per BSC can be viewed and analyzed on

the M2000.

KPIs can be exported from the M2000 as .csv, .xls, .html, or .txt

files.The performance data is saved at

\\aaa.bbb.ccc.ddd\bsc6000\data\mtndata\pfm\rslt .

\\OMC\BSC\BAM\appsvr\stats\data

In the path, aaa.bbb.ccc.ddd indicates the IP address of the GBAM/GOMUserver.


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KPI key performance indicator

Immediate Assignment Success Rate = Call Setup Indications

(Circuit Service) /Channel Requests (Circuit Service) x 100%Experience value: 90% 95% 99%

SDCCH Congestion Rate (All Channels Busy) = Failed SDCCH

Seizures due to Busy SDCCH/SDCCH Seizure Requests x 100%

Experience value: 1% 0.5% 0.1%

Call Drop Rate on SDCCH = Call Drops on SDCCH/SuccessfulSDCCH Seizures x 100%

Experience value: 3% 1% 0.5%


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TCH Congestion Rate (All Channels Busy) = (Failed TCH Seizures

due to Busy TCH (Signaling Channel) + TCH Seizure Requests

(Signaling Channel) + Failed TCH Seizures due to Busy TCH per

BSC (Traffic Channel) + Failed TCH Seizures in TCH Handovers due

to Busy TCH perBSC (Traffic Channel))/(TCH Seizure Requests

(Signaling Channel) + TCH Seizure Requests in TCH Handovers

(Traffic Channel)) X 100%

Experience value: 1.5% 1% 0.5%


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TCH Call Drop Rate (Including Handover) = Call Drops on TCH/(Successful

TCH Seizures (Signaling Channel) + Successful TCH Seizures (Traffic

Channel) + Successful TCH Seizures in TCH Handovers (Traffic Channel)) x

100%


TCH Call Drop Rate (Excluding Handover) = Call Drops on TCH in Stable

State (Traffic Channel)/Successful TCH Seizures (Traffic Channel)) x 100%


Traffic Call Drop Rate = 60 x Traffic Volume on TCH/Call Drops on TCH

Experience value: 60min 100min 150min


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BSS Call Establishment Success Rate = ((Immediate Assignment

Success Rate x Assignment Success Rate) x (1 SDCCH Call Drop

Rate)) x 100%

Experience value: 90% 95% 98%

Call Complete Success Rate = (1 - SDCCH Congestion Rate) x (1 -

SDCCH Call Drop Rate) x (1 - TCH Congestion Rate) x (1 TCH Call

Drop Rate) x 100%


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Handover Success Rate = (Successful Internal Intra-Cell Handovers per BSC +Successful Internal Incoming Cell Handovers per BSC + Successful External

Incoming Cell Handovers per BSC + Successful External Outgoing Cell

Handovers per BSC)/(Intra-Cell Handover Requests + Internal Incoming Cell

Handover Requests per BSC + External Incoming Cell Handover Requests per

BSC + External Outgoing Cell Handover Requests per BSC) x 100%

Radio Handover Success Rate = (Successful Internal Intra-Cell Handovers per

BSC + Successful Internal Incoming Cell Handovers per BSC + Successful

External Incoming Cell Handovers per BSC + Successful External Outgoing

Cell Handovers per BSC)/(Intra-Cell Handover Commands + Incoming Internal

Inter-Cell Handover Responses per Cell + Incoming External Inter-Cell

Handover Responses + Outgoing External Inter-Cell Handover Commands ) x

100%

Experience value: 90% 95% 98%


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Worst cell

TCH traffic per channel is higher than 0.1 Erl

TCH Call Drop Rate of higher than 3%

orTCH Congestion Rate higher than 5%


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AccessibilityImmediate assignment success rateCongestion rate

TCHSDCCH

RetainabilityCall drop rate

TCH

SDCCHMobility

Handover success rateIntra-cell/internal cell per BSC/external cell per BSCIncoming/outgoingHandover/radio handover

Resource utilization

Traffic volumeTCHSDCCH

Channel availabilityTCHSDCCH

Summary


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BSC Measurement


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SCCP/MTP3/ LAPD Measurement

LAPD Measurement is used to measure the basic

signaling process and the traffic volume on the Abis

and Pb interfaces

SCCP Measurement refers to the measurement of SCCP originalsignaling points (OSPs)

MTP3 Measurement

Message Transfer Part Level 3 (MTP3) Measurement is used tomeasure the MTP3 link.


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System Load Measurement

CPU usage of the BSC boards and the GBAM.

If the CPU usage reaches 80% occasionally does not necessarily

mean that the BSC is faulty.

If the CPU usage is high for a long time, exceed the buffer ability.

The BSC will abandon new service requests.

After a board or the GBAM runs for 30 seconds, the BSC measures

the CPU usage every second and accumulate.


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BTSM/Resources/MSC/CBC/PCUMeasurement

BTSM Measurement - Base Transceiver Station Management (BTSM)measurement is used to measure the state of the BTS, cell, and TRX,and link communication state between the BSC and the BTS.Resources Measurement is used to measure the state of circuits on

the A interface, Pb interface, and Ater interface, and the TCresources.MSC Measurement is used to measure the number of MSC resetsand the number of messages that the BSC receives from the MSC.Cell Broadcast Center (CBC) measurement refers to the

measurement of the reception of cell broadcast data and theresponse of the BSC to the data.PCU Measurement is used to measure the number of messages thatthe BSC receives from the PCU.


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Paging Measurement

Paging Measurement refers to the measurement of the number of

pagings on the A interface and Abis interface.


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CallMeasurement


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MR Measurement


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Channel Measurement


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BSC Traffic Statistics Item (summary)

BSC Measurement

SCCP Measurement

MTP3 Measurement

LAPD Measurement System Load Measurement

BTSM Management

Resources Measurement

MSC Measurement

CBC Measurement

PCU Measurement

Paging Measurement Call Measurement

MR Measurement

Channel Measurement


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Common principle

Systematical logic

From whole system to specific cell

Integrality

Observe the change trend of the items for more than one week andthe changing trend of each day.

Relativity

Relationship between various kinds of traffic statistics items


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Basic solution

Preparation

At least one week traffic data

Engineer parameter and geographic display of distribution of sites

Step

BSC measurement-----worst KPI

KPI measurement per cell------worst cell

Check reason ------sub-item in Call measurement and MR measurement


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Traffic items checklist

TCH Call drop

Alarm

MR measurement

Interference Band Measurement per TRX

Radio Link Failure Measurement TA / signal level / quality

Uplink-and-downlink Balance

Receive level

Receive quality

Call measurementCall drop Analyzed Measurement per cell cause

Handover


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TCH congestionAlarm

Call Measurement

Traffic Volume on TCH per cell Traffic adjustment

~ Idle mode CRO

~ Dedicated mode Handover

Expansion (Switch on HR or ADD more TRXs)

Frequently handover Ratio between call set up and handover

MR Measurement

Interference band

Receive levelReceive quality

Power Control Distance between MS and BTS (Overshooting)

Number of MRs Based on TA


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SDCCH congestionCall setup

IMSI attach/ detach

Location area updating

SMS

FAX

Immediate Assignment Measurement per cell

Channel requests MOC MTC Location update SMS


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Handover

Common parameter / Clock

Intra Handover/ Inter Handover

Incoming Handover / Outgoing Handover

Check the cell parameter

CGI

BCCH

BSIC


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Thank youwww.huawei.com


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HUAWEI TECHNOLOGIES CO LTD Huawei Confidential Page 28

MS BTS BSC MSC

(1) ~ (8) refer to the random access procedure

and immediate assignment procedure. In the

two procedures, BSS allocates signaling

channels to MS.

Between (10) ~ (11), there may exist an

authentication procedure, ciphering mode

setting procedure and classmark interrogation

procedure (updating procedure).

(14) ~ (22) refer to the TCH assignment

procedure. In this procedure, BSS allocates the

resources such as TCHs, A interface circuit, etc.

to MS.

(30) ~ (40) refer to the release procedure.

The procedure is a release procedure in which

the calling MS first hangs up. The logical

channels on Um interface are released prior to

the physical channels.

g lii 304 traffic statistics analysis 20080421 a 2.0

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