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IDEN - USE OF THE VMS AS A GATEWAY TO THE DISPATCH NETWORK

IP.com Disclosure Number: IPCOM000009782D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-18

Publishing Venue

Motorola

Related People

Rod Averbuch: AUTHOR [+2]

Abstract

The purpose of this memo is to show a possible enhanced functionality for the Voice Mail Services (VMS) in iDEN. The idea is to use the VMS as a gateway to the iDEN Dispatch Network. Through the Dispatch Network it will be possible to send voice messages or to interconnect a PSTN subscriber to a mobile one.

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This is the abbreviated version, containing approximately 21% of the total text.

MOTOROLA

Technical Developments

IDEN - USE OF THE VMS AS A GATEWAY TO THE DISPATCH NETWORK

by Dan Wolf, Yakov Simkin and Anatoly Belkin

GENERAL

The purpose of this memo is to show a possible enhanced functionality for the Voice Mail Services (VMS) in iDEN.

The idea is to use the VMS as a gateway to the iDEN Dispatch Network. Through the Dispatch Network it will be possible to send voice messages or to interconnect a PSTN subscriber to a mobile one.

PRESENT SITUATION

Figure 1 shows the position of the VMS in today's iDEN environment.

MAP/C7

MSC. HLR

SMS

A mobile subscriber with access to interconnect, can already use the VMS. Under certain circumstances (unconditional, busy, etc.), voice messages for the mobile subscriber can be forwarded to the VMS.

The VMS can access the SMS-SC to inform the mobile subscriber that voice/fax mail is present in his voice mailbox.

Through interconnect side of iDEN or through PSTN, the mobile subscriber can reach the VMS.

Through the use of DTMF, interaction between the subscriber and VMS can take place.

BSC

-z--.

I

EBTS

Fig. 1 VMS in iDEN environment - present situation

Motorola, Inc. 2000

62

May 2000

MOTOROLA

Technical Developments

. SMPP over TCP/IP from Aldiscon

between the VMS and Metro Packet Switch (MPS) will be over TI. Through the MPS, the VMS can send frame relay packaged LAP-D messages to the DAP and VSELP voice to the MS.

There are various possible interfaces and protocols betWeen VMS and SMS-SC, for example:

. OCL over X.25 from Octel

In order to be able to connect to the Dispatch Network, the VMS needs ACG like functionality for communication with:

An SS7 connection is used between VMS and MSC, while the connection of VMS to PSTN can use a variety of signaling systems.

. DAP for Call Control

CONNECTING THE VMS TO THE DISPATCH NETWORK

. Packet Duplicator for voice distribution

Figure 2 shows the new proposed interface to be added to the VMS. The new physical connection

The MPS will provide PVC's needed to switch the frames.

MAPIC7

MSC. HLR

SMS

-'-Z--

I""

""

:~:

EBTS

Fig. 2 Enhanced VMS functionality

Motorola, Inc. 2000

MOTOROLA

Figure 3 shows the VMS interfaces related to the transfer of voice messages, enhanced by the addition of Dispatch access. The VMS will maintain

Technical Developments

the standard functionality allowing access from the iDEN interconnect side and from PSTN through a SS7 interface.

-z.-

C7 BSC VSLP I

MSC EBTS 'ifJjJ - PSTN SS7 VMS VSELP

Text

SMS

Fig. 3 VMS 's voice interfaces

NETWORKING THE VOICE MAll SYSTEMS

The Dispatch systems are not fully interconnected due to physical limitations. There is a certain degree of interconnectivity through regional dispatch and other interconnection schemes. In practice there will be multiple VMSs, each with access to a part of the Dispatch network.

By interconnecting the VMSs through WAN and using TCP/1P it is possible keep the voice messages in the "Home VMS" and use another VMS to pass the messages to a roaming MS (Figure 4).

Examples:

Scen...