Visitor Location Register

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Descriptions

 

The VLR entity is integrated in the MSS. The VLR stores information of all subscribers who enter the present service area. It also registers mobile subscriber identity, location identity and service parameters for the subscribers. It allocates Mobile Subscriber Roaming Numbers (MSRN) for terminating calls to subscribers located in its area.

 

 

See Also

 

VLR Parameter Dictionary

 

Enable Supplementary Service

 

Enable VLR Purge

 

Enable Ciphering

 

Enable TMSI Reallocation

 

Enable Non-registered or No SIM Emergency Call

 

Enable Location Based Emergency Call

 

Enable Authentication

 

Enable Equipment Identity Register

 

VLR Subscriber Management

 

 

Feature List

 

Feature

Descriptions

Capacity

100k subscribers

Data management

Authentication

Location update

TMSI allocation

MSRN

Ciphering

Purge

Data restoration

IMSI detach/attach

MAP/CAP version negotiation

Basic services

MO/MT call

Emergency call

Short message service

Supplementary services

Call forwarding:

Call forwarding unconditional (CFU)

Call forwarding on subscriber busy (CFB)

Call forwarding on no reply (CFNRy)

Call forwarding on subscriber not reachable (CFNRc)

Call hold

Call waiting

Call barring

Premium call

Password control

Calling Line Identification Presentation (CLIP)

Calling Line Identification Restriction (CLIR)

Connected line identification presentation (COLP)

Connected line identification restriction (COLR)

Explicit call transfer

Operator determined barring (ODB)

Operator specific barring (OSB)

Three-party call (3PTY)

Unstructured Supplementary Service Data (USSD)

enhanced Multi-Level Precedence and Preemption Service (eMLPP)

Support of encryption

Encryption provisioning (Kc)

Load sharing

Dual servers load sharing and redundancy

License control

VLR application flag

10 to 100k VLR subscribers at multiples of 100

 

 

VLR Parameter Dictionary

 

Parameter

Definition

Range

System

--

--

Authentication

Enable or disable authentication of the SIM in the mobile. Need AUC support.

--

Location Update

Power On means only the initial Location Update will be authenticated.

All Location Update Authentication means all location update processes will be authenticated.

Disable

Power On

All LU

MO Call

MO Authentication ON means authentication is necessary when making a Mobile Originating call.

Enable

Disable

MT Call

MT Authentication ON means authentication is necessary when making a Mobile Terminating call.

Reuse Triplets

--

--

Reuse Triplets

Setting this parameter permits a mobile to reuse triplets previously assigned to it by the system.

Enable

Disable

Double Authentication

Enable this parameter to force the system to perform a second authentication processes when the initial authentication fails.

Ciphering

Setting this parameter forces the mobile to use ciphering over the air interface.

Enable

Disable

Ciphering Algorithm

Select a ciphering algorithm from the drop-down menu.

None

A5_1 to A5_7

TMSI Allocation

Allocate TMSI forces the system to allocate a TMSI only the first time a call management service is requested.

Reallocate TMSI forces the system to allocate a new TMSI every time a call management service is requested.

Disable

Allocate TMSI

Reallocate TMSI

OSB Definition

These options allow the operator to set whether a call is allowed or barred:

If this option is set to call allow, the call with the called number matched the dialing prefix with the OSB attribute enabled will be allowed to pass through, all other calls will be barred.

If it is set to call bar, the call with the destination number matching the dialing prefix defined with the OSB attribute enabled will be barred while all other calls will be allowed.

Disable

Allow

Bar

EC Setup Allowed

Setting this parameter allows a non-registered mobile or a mobile with no SIM to make emergency calls.

Enable

Disable

IMEI Verification

Enable or disable equipment identity. Need EIR support.

--

Location Update

Setting this parameter forces the system to validate mobile equipment identity in Location Update processes.

Enable

Disable

MO Call

Setting this parameter forces the system to validate mobile equipment identity when making a Mobile Originating call.

MT Call

Setting this parameter forces the system to validate mobile equipment identity when making a Mobile Terminating call.

VLR Purge

Enable or disable the VLR Purging feature. When this feature is on, the system purges numbers from the VLR when they have been idle for the amount of time specified in the Idle Period to Purge fields.

Enable

Disable

Idle Period to Purge

This field determines how long a VLR entry can remain idle before the system purges it.

1 - 65535 mins

CDR Flag

Enable or disable Call Detail Record generation of VLR.

Enable

Disable

Update HLR Option

--

--

Normal LU

Setting this parameter forces VLR to update subscriber data from HLR in normal location update processes.

Request

No request

Periodic LU

Setting this parameter forces VLR to update subscriber data from HLR in periodic location update processes.

IMSI Attach

Setting this parameter forces VLR to update subscriber data from HLR in IMSI attach processes.

MSRN Start

The start of the MSRN range.

Valid E.164 number

MSRN End

The end of the MSRN range.

OPR Flag

Enable or disable OPR service.

Enable

Disable

IMDX Flag

Enable or disable IMDX service.

IMSI Prefix for OPPS

OPPS substitutes the IMSI prefix (MCC+MNC) of the inbound OPPS users by the predefined pseudo IMSI prefix for HLR routing purpose. It should be different from the IMSI prefix of the local network or any other roaming partners' networks.

MCC+MNC

Default Priority

Specify a default priority to subscribers. It cooperates with the eMLPP option in the MSC setting.

Normal

Level 0 - 4

Level A - B

ODB BOIC SMS Barring

Enable or disable barring International SMS (or International SMS except to HPLMN) when ODB BOIC (or ODB BOIC-exHPLMN) is enabled.

Enable

Disable

Management

--

--

Version

(Read Only) VLR software version.

x.y.z

Status

(Read Only) The current status of VLR.

--

 

 

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2.1.1.2