OWD090706(Slide) GGSN9811 V900R007C02 Offline Charging Principle-20090820-B-V1.0

8/14/2019 OWD090706(Slide) GGSN9811 V900R007C02 Offline Charging Principle-20090820-B-V1.0

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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

www.huawei.com

GGSN9811V900R007C02Offline

Charging

TSD Core Network Introduction Dept Yu ChunhuiAugust 20, 2009

[email protected]


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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved. Page1

Objectives

Upon completion of this course, you will be able to:

Familiarize yourself with the architecture of the charging data record

(CDR).

Familiarize yourself with the management configuration related to offline

charging.

Different from the offline/online charging, the content-based charging is from

another dimension and thus it is not described in this document.


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Contents

1. Overview of GGSN Charging

2. CG Server Configuration Management

3. CDR Triggering Management

4. Charging Characteristic Control Management

5. Tariff Switch Control Management

6. CDR Format Management

7. AAA Charging Management

8. Envelop Report Management

9. G-CDR Audit Function


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Charging Network Summary

PDN

UMTS

GGSNSGSN

PCRF

GPRS Gn/GpGn/Gp GiGi

GxGxGyGyGzGa

CGF

Billing Center

AF

OCS(IN/RE)

RxRx

GrGr

HLR

AAAAAAAAAAAA

Firewall

Portal

SPR

IMS

GGSN charging consists of offline charging, online charging, and authentication, authorization

and accounting (AAA) charging.

Content-based charging can be performed on both online charging and offline charging.


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Charging Architecture

Charging Data Collection

CDR

ProcessingDCCA Client

Radius

ClientPDP Context

Management

User Profile

CGF OCS AAA Server

Hard

Disk

CDR

Storage

SPU SRU

GGSN

Charging

Packets Forwarding

and Service Control

User

ManagementCharging Processing and Control

Offline Charging Online Charging

Data

Flow

CGF: The charging gateway functionality (CGF)

processes the offline charging.

OCS: The online charging system (OCS) processesthe online charging.

AAA: The AAA server processes the AAA charging.

Note:

The content-based

charging is processed

in the User

Management module.

It is in different

dimensions compared

with online/offline

charging.


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Charging Configuration Architecture

Charging

Online

Charging

Offline

Charging

OCS host

CGGCDR

Version

GCDR

Trigger

Container

Trigger

GCDR Fields

Switch

CC and CC-

Selection-ModeTariff Time

GCDR

Threshold

GCDR

Audit

CCR

Threshold

Return CodeBehavior

CCFHBehavior

Initial RG

Failback

Total/Delta

report

CCR

Trigger

CCR AVP

Switch

Radius

AccountingRadius ACCT

Server

Interim Accounting

Trigger

Interim Accounting

Threshold

Radius ACCT

AVP Switch

ACCT On/Off

Control

Radius ACCT

Buffer


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Charging Classify

Offline Charging Online Charging

Normal Billing Offline Charging at PDP

level.

Online Charging at PDP

level.

Content Based Billing Offline Charging atservice level.

Online Charging at servicelevel.

Note:

AAA charging does not support content-based charging and supports only

traffic report.Charging by the Internet service provider (ISP) is implemented through the

interworking between the GGSN9811 and the AAA server on the external

network. ISPs vary according to the accessed PDNs and therefore charging

should be based on APNs.


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Charging Modes Selection (Offline/Online)Activate users

Check the

offline/online charging

function based on the

roaming attributes.

visit home roam

both both online

Charge-control

online offlineenable disable

charge-characteristic online offline

prepaid enable disable

postpaid disable enable

Two CC values: prepaid and

postpaid. Postpaid is the

combination of normal, hot

billing, and flat-billing.

Based on user

profile

Based on APN

Based on CC

online offline

enable disable

YN

Priority High

Priority Low

charge-method

N

Offline charging: No CDRs

Online charging: No interaction with

the OCS


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Contents











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Offline Charging Overview

GGSN

AAACG

F

Billing System

PDN

GTP

'

GnGi

Radius

Subscriber DB

SGSN

CDR Auditing Server

FTP

Active/standby CGs


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CG Configuration

ip grade cg-type destination-port

10.100.3.19 0 r7 3386

10.100.3.20 1 r7 3386

GGSN

Ga interface

interface workmod description vpn-instance ip address

Gaif3/0/0 NA

Ga_Logical_Int

erface tmd_ga 10.241.225.81/32

Gaif3/1/0 NA

Ga_Logical_Int

erface tmd_ga 10.241.225.82/32

eth-trunk 8 backup Ga_trunk tmd_ga 10.241.226.193/28

2. IP address and

protocol type of

the CG

1. Logical address

and physical

address of the Ga

interface on the

GGSN

The table lists only the key contents. The actual commands and parameters may be different.

CG0 CG1 retransmit timeout

3 3

3. CG resend

mechanism


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G-CDR Version and CGF Selection

R98

R99

R4

R5

R6

R7

CDR Version CG

APN

Global

Priority High

Priority LowCG-ip grade cg-type

10.100.3.19 0 r7

10.100.3.20 1 r7

APN cg-type

internet.t r6

mms.t r5

The CDR version can be configured based on the

APN, which has higher priority than the CDR

version configured globally.

If the APN is not configured with CDR-version, adopt the global configuration.


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CG Redirection Procedure


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Contents











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G-CDR Trigger Mechanism (Triggering Condition)

Globalcdr-trigger container-trigger

CDR and container

generation conditions

rat-change

sgsn-plmn-id-change

sgsn-change

mbms-cdr-switch

ms-time-zone-change

max-cond-change

rat-change

sgsn-plmn-id-change

sgsn-change

rai-change

qos-change

tariff-switch-change

uli-change

APN cdr-trigger-binding container-trigger-binding

CDR and container

generation conditions

rat-change

sgsn-plmn-id-change

sgsn-changems-time-zone-change

max-cond-change

rat-change

sgsn-plmn-id-change

sgsn-changerai-change

qos-change

tariff-switch-change

uli-change

CDR generation

conditions are

slightly different.


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G-CDR Trigger Mechanism (Condition Field

Value)

Global

Charge-type-property (CDR generation field value)

Configured based on the charging characteristic value

Charge-general-property (CDR generation field value)

Configured based on the CDR version

volume-

threshold

charge-condition-

change-threshold

gsn-

node-id

sgsn-

change-

threshold

time-

thresh

old

record-

sequence-

number

mbms-

volume-

threshold

mbms-

time-

threshold

offline-

qct

0 10

GGNF

FM11 0 30 1 1024 60 0

charge-condition-

change-threshold

volume-

threshold

time-

threshold

sgsn-change-

threshold

3 1024 60 3

If this table is configured with data,

the priority takes effect based on this.

Otherwise, the priority takes effect

based on charge-general-property.

[apn]

time-

threshold

volume-

threshold

charge-condition-

change-threshold

sgsn-change-

threshold

bypassall

.huawei 10 0 10 0

APN

If the APN is configured with data,

the priority is the highest.

charge-threshold


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Forcible CDR Generation

Force-generate-cdr

This command can be executed for MSISDN, IMSI, SPU slot, and all GGSNs.00

Using the force-generate-cdrcommand, you can enable the system to forcedly generate CDRs.

This command is used to test the charging system. During the test, if the thresholds for the

GGSN to generate CDRs are not reached and the condition for automatically generating CDRs

is not met, you can run the force-generate-cdr command to manually generate CDRs.


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Contents











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Charging Characteristics Description

GGSNSGSN

SGSN getCC from HLR

Gn/Gp

GrGr

HLRIf the SGSN

chargingcharacteristics are

not used or theSGSN does not

have the chargingcharacteristics, usethe GGSN charging

characteristics.

Charging characteristics refer to users' charging

types, including normal charging, hot billing,

prepaid, and flat-billing. CDRs can be generatedin different modes for different charging types.

Users' charging characteristics comply with

characteristics configured on the SGSN or the

GGSN.

Postpaid

Prepaid

Postpaid

Prepaid

Hotbilling

Flatrate

The four charging characteristics values

of the GGSN are categorized into two

types, namely, prepaid and postpaid.

Charging

Characteristics


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Charging Characteristics Description

LocalConfiguration

Charging-Characteristic-Selection-mode

Home SGSN supplied prepaid

Roam SGSN not supplied normal

Visit SGSN supplied hotbilling

The GGSN supports three types of users, local users, roaming users, and visitors. Local users

are users who subscribe to the local PLMN, are not roaming to another PLMN, and are activated

on the local GGSN.

Roamers are users who subscribe to the local PLMN, roam to another PLMN, and are activated

on the local GGSN.

Visitors are users who subscribe to another PLMN, roam to the local PLMN, and are activated

on the local GGSN.

Local users and roamers are called home users of the local PLMN.

CC configuration template. You can name it to "Free charging"

In actual configuration, this parameter is called charge-

characteristic-name, which might be confused with thecharging characteristic value. The charging characteristic

values are prepaid, normal, hotbilling, and flat-billing.

CC-value


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Charging Characteristics Applications

CC-Name

Userprofile

Apn [apn]charge-

characteristic

wap Free-charging

[user-

profile]

{charge-

characteristic}

up1 Free-charging

Priority High

Local

ConfigurationCharging-Characteristic-Selection-mode

Home SGSN supplied prepaid

Roam SGSN not supplied normal

Visit SGSN supplied hotbilling

Free-charging

Note: When the user profile is matched

according to the charging characteristic value,

this configuration is invalid.

special-charging

......

Indicates that the charging characteristic of the local

user is based on the charging characteristic when the

user is activated. If the charging characteristic is not

carried, set it to prepaid.


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Contents











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Tariff DescriptionTariff refers to the

configuration of tariff change

time. You can set multiple tariff

change time template in

advance.

Tariff group

charge-type tariff-type start-time end-time

prepaid Festival 01:00 07:00

global workday 0:00 0:00

workday

weekend

Global

Hotbilling

prepaid

Normal

charge-type year month day

prepaid NA 10 1

Festival

charge-type day-of-week tariff-type

global Monday workday

global Tuesday workday

global Wednesday workdayglobal Thursday workday

global Friday workday

global Saturday workday

global sunday workday

Step1: Set the festivals

Step2: Set workdays and weekends.

Set charge type for three of

charging characteristics and

plus a global configuration.

Step3: Set the tariff change of acharge type.

tariff-group-name

Friend-user

massmarket


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Tariff-Group Applications

Tariff-group

Userprofile

Apn[apn] tariff-group

wap global

user-profile tariff-group

up1 Friend-userPriority High

charge-type tariff-type start-time end-time

prepaid Festival 01:00 07:00

global workday 0:00 0:00

tariff-group-name

Friend-user

massmarket


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Contents











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G-CDR Parameter Management

list-of-service-data

network-initiated-pdp-context

served-imeisv

served-pdp-address

dynamic-address-flag

record-sequence-number

user-location-information

ims-signalling-contextexternal-charging-identifier

ps-furnish-charging-information

rat-type

ms-time-zone

The GGSN9811 supports customized

CDR formats. Thus, operators can setthe 23 optional fields of CDRs based on

actual requirements. The default values

of all optional fields are enable.

APN network-identifier

APN Selection Mode

Charging characteristic selection mode

Whether diagnosis information is carried

Whether container ID is carried

Local Record Sequence Number

Served MSISDN

Node ID

PDP context type

SGSN PLMN flag

recordExtensions field

For details, see 3GPP TS 23.060, Stage 2.

and 3GPP TS 29.061.


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G-CDR Format Definition

Item Detail

LocalRecordSequenceNumber Consecutive record number created by this node. The number is allocated sequentially

including all CDR types.

MSISDN The primary MSISDN of the subscriber.

NodeID Name of the recording entity.

APNSelectionMode An index indicating how the APN was selected.

ChargeCharacteristicSelectionMode Holds information about how Charging Characteristics were selected.

SGSNPLMNIdentifier SGSN PLMN identifier (MCC and MNC) used during this record.

APNNetworkIdentifier The logical name of the connected access point to the external packet data network

(network identifier part of APN).

PDPType PDP type, i.e. IP, PPP, or IHOSS:OSP

Diagnostics A more detailed reason for the release of the connection.

ListofTrafficVolume A list of changes in charging conditions for this PDP context, each time stamped.

Charging conditions are used to categorise traffic volumes, such as per tariff period.

Initial and subsequently changed QoS and corresponding data values are listed.

RecordExtensions A set of network/ manufacturer specific extensions to the record.


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G-CDR Format Definition (Continued)

Item Detail

dynamic-address-flag Indicates whether served PDP address is dynamic, which is allocated during PDP context activation.

external-charging-id Holds a Charging Identifier and is present only if it is received from a non-GPRS, external network entity.

ims-signalling-context Included if the IM-CN Subsystem Signalling Flag is set, see PDP context is used for IMS signalling.

list-of-service-data A list of changes in charging conditions for all service data flows within this PDP context, each change is time

stamped. Charging conditions are used to categorize traffic volumes, such as per tariff period and per service data

flow. Initial and subsequently changed QoS and corresponding data values are also listed.

ms-time-zone This field contains the MS Time Zone the MS is currently located as defined in TS 29.060, if provided by

SGSN.

network-initiated-pdp-

context

Present if this is a network initiated PDP context.

ps-furnish-charging-

information

Online charging session specific information.

rat-type the Radio Acces Technology (RAT) type

record-sequence-number Partial record sequence number.

served-imeisv IMEISV of the ME, if available.

served-pdp-address PDP address, i.e. IPv4 or IPv6

user-location-information This field contains the User Location Information of the MS as defined in TS 29.060, if provided by SGSN.


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Charging Mode Selection (AAA)

Activate user

Radius server accounting

radius-server

group

ip-

address port vpn key

carbon-copy |

secondary

mm10.111.23.7 1813

tmd_mm

TMDH

N0206SC NA

Check whether the APN of

the user is

configured with the

RADIUS server group

No charging

interaction with

the AAA server

Perform charging

interaction with

the AAA server

Y

N

For details about the AAA charging procedure, see the

protocol signaling documents delivered with the GGSN

versions.

radius-server group retransmit timeout

mm 1 3

Set the AAA server

retransmission

mechanism


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AAA Charging Procedure

MT SGSN GGSN

PDP Context Activate Request

Create PDP Context Request

AAAServer

Access-Request

Access-Accept

Activate PDP

Context Accept

User Data Session

Deactivate PDP Context Request

Delete PDPContext Response

Deactivate PDPContext Accept

PDN

Create PDPContext Response

Accounting-Request (start)

Accounting-Response (start)

Delete PDP Context Request

Accounting-Request (stop)

Accounting-Response (stop)

TE


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AAA Charging Basic Information Element Control

radius-server acct-attribute

radius-server acct-3gppvsa

radius-server acct-onoffsig

1. Configure the AAA charging 3GPP private extended attribute of the

RADIUS server group.

[radius-server group] 3gpp charging-id ......

mm enable enable enable

2. Configure the attributes of the optional accounting messages of a RADIUS server

group. The attributes include whether the GGSN sends the Accounting Request ON and

Accounting Request OFF messages after restarting, expiration time of the messages,

number of retransmission times, waiting time, and whether a user is allowed to be

activated before a response is received.

radius-server group optional-account-message timeout retransmit waittime active

mm enable 3 3 9 disable

radius-server group calling-station-id imsi charging-id ......

mm enable disable disable disable

3. Configure the AAA charging private extended attribute of

the RADIUS server group.

Note:For AAA charging, if not special requirement, use the default value. If the customer has

special requirements, you must communicate with them about the parameters.


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Contents










E l R ti D i ti (Eff ti O l


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Envelop Reporting Description (Effective Only

in Content-based Charging)

The envelope records continuous traffic volume in a period.

The traffic generation time spans multiple base time intervals (BTIs). The BTI is the basic unit for calculating the service

duration.

When there is data traffic for a service in a BTI, the service duration is recorded as one BTI. The traffic volume and the

duration are recorded in an envelope.

When there is no data traffic for a service in a BTI, the envelope corresponding to the service is closed and the traffic

volume and duration are no longer recorded. The traffic volume and duration that are already recorded are reported as one

envelope. At present, the following types of envelop reporting are supported. You can run time-quota-mechanism to

enable the APN envelop reporting.

CTP

DTP

Modified CTP

Envelope Reporting: The GGSN9811 supports the envelope reporting function to provide more detailed charging

information for the online/offline charging system based on the standard duration reporting. The detailed charging

information including start time, end time, and traffic volume of a service can be identified for operators to control

credit and charge the user appropriately.

Continuous time period (CTP) records in envelopes the duration of BTIs during which no traffic is available;

however, modified CTP does not.

Discrete time period (DTP) generates one envelope in one BTI.

apn time-quota-mechanism type bti

internet enable ctp 10


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Envelope Reporting (Traffic-based)

Rating Group:RG 1 Rating Group:RG 2

40K 40K

40K40K20

K

15

K

5

K

35K1

0

K

idle

idle

1

0

K

30K

7 Minutes 4.5 Minutes 10 Minutes

GCDR 1:

Duration = 7m

LoTVD =100K

LoSD = {}

Reason = volume limit

5 Minutes 1.5

GCDR 3:

Duration = 20.5m

LoTVD = 90K

LoSD = { RG2 = 150K, T1, T4},

{ RG1 = 100K, T2, T3},

{ RG1 = 30K, T5, T7 },

{ RG2 = 10K, T6, T8 }

Reason = PDP release

6 Minutes

Scenario 1: GCDR generation with Volume limit = 100 Kbytes

Base-Time-Interval:

4 minutes

BTI1 BTI2 BTI3 BTI4

GCDR 2:

Duration = 6.5m

LoTVD =100K

LoSD = {}

Reason = volume limit

5K

BTI1

T1 T2 T3 T4 T7 T8T5 T6

Envelope 1 Envelope 2

Envelope1 Envelope2

BTI1 BTI3 BTI7 BTI1BTI2 BTI4 BTI5 BTI6

Rating group (RG) is described in content-based charging,

which refers to that a subscriber corresponds to two different

services and the services are recorded to different RGs.

The specific

envelop

reporting

content is

carried in the

next CDR after

the envelop is

generated.


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The GCDR generation is based on time only.

PM is BTI. Some carriers prefer this name.

Envelope Reporting (Time-based)

GCDR1

Duration=10m

Lotvd=2kB

LoSd={}

Reason=time limited

GCDR2

Duration=10m

Lotvd=10kBLoSd={}

Reason=time limited

GCDR3Duration=10m

Lotvd=3kB

LoSd={rg1=12k,T1,T2}

Reason=time limited

GCDR4

Duration=10m

Lotvd=3.1kB

LoSd={rg1=3k,T3,T4}

Reason=time limited

GCDR5

Duration=8m

Lotvd=3.2kB

LoSd={rg1=6.3kB,T5,T6}

Reason=pdp release

2KB 10KB 3KB 3.1KB 3.2KB

T1 T2 T3 T4 T5 T6


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Contents











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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

CDR Audit

The CDR audit function of the GGSN ensures that the CDRs can be traced. Each time the GGSN

generates a CDR, the GGSN generates an associated CDR audit record. The CDR audit records arestored in CDR audit files, which provide reliable data for tracing faults.

CDR audit record contains the following information:

CDR opening timestamp

Served IMSI

Served MSISDN

Charging ID

Local record sequence number

CDR Sequence Number

Duration

Rating Group

CDR corruption indication

The GGSN stores CDR audit

files in the specified directory of

the hard disk and periodicallysends them to the File Transfer

Protocol (FTP) server through

FTP or secure shell FTP (SFTP).

After a CDR audit file is sent to

the FTP server successfully, the

automatically deletes the CDR

audit file from the hard disk.


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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

CDR Audit

Hard Disk

LPU

FTP Server

for

CDR Auditing

Charging

Gateway

SPU

SRUGGSN

CDR

Proces

s

CDRAuditing

FTP

Client

CDR Auditing

CDR Auditing

Buffer

Charging Processing

FTP Client

for

GCDR File

Transfer

GCDR file

Download

and upload

FTP

Server


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Thank youwww.huawei.com

OWD090706(Slide) GGSN9811 V900R007C02 Offline Charging Principle-20090820-B-V1.0

Documents