Browse Prior Art Database

LINK MANAGEMENT SOLUTION FOR IDEN SYSTEMS HAVING MULTIPLE DAPs

IP.com Disclosure Number: IPCOM000007723D
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2002-Apr-17
Document File: 2 page(s) / 98K

Publishing Venue

Motorola

Related People

Timothy Spets: AUTHOR [+3]

Abstract

This publication describes a solution to the prob- lem of adding more DAP's (Dispatch Application Processors) to a IDEN system without adding addi- tional LAPD links to each ACG (Audio Controller Gateway), or a network layer to route dispatch call processing protocol to the correct DAI? The Link Management Solution Controls the LAPD links to the ACG and the Multiple DAPs and keeps virtually the same link integrity as with a connection to only one DAI! This transparent linking would appear as a point to multipoint configuration.

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MmROLA Technical Developments

LINK MANAGEMENT SOLUTION FOR IDEN $Y~TEM~ HAVING MULTIPLE DAPs

by Timothy Spets, Kenneth Wollack and Paul Erikson

  This publication describes a solution to the prob- lem of adding more DAP's (Dispatch Application Processors) to a IDEN system without adding addi- tional LAPD links to each ACG (Audio Controller Gateway), or a network layer to route dispatch call processing protocol to the correct DAI?

  The Link Management Solution Controls the LAPD links to the ACG and the Multiple DAPs and keeps virtually the same link integrity as with a connection to only one DAI! This transparent linking would appear as a point to multipoint configuration.

  Currently in an IDEN system, a DAP has two LAPD links to each ACG (*Figure 1). One is a Primary link that will be used exclusively whenever it is available, the other is a secondary link that is only used when the Primary fails. The reason for two logical (LAPD) links is because there are two physical DAP connections.

  With the addition of two routers and an **addi- tional DAP each DAP has links to the same ACG (*Figure 2). All Primary links for a specific ACG reside in the same router, the same goes for the Sec- ondary links. The Primary link for an ACG will not reside on the same router the Secondary link resides on. The Link management software runs in the router and provides the connection integrity based on three simple rules.

1. If the Primary ACG to Router LAPD link fails (or is brought down by rule #3), the router will force down all Primary DAP to Router LAPD link(s) for the particular ACG (DLCI).
2. Ifthe Secondary ACG to Router LAPD link fails, the router will force down all Secondary DAP to Router LAPD(s) for the particular ACG (DLCI).
3. If one of the primary DAP to Router L...