dc.contributor.author | Larsen, Erlend | |
dc.date.accessioned | 2007-07-25T11:23:26Z | |
dc.date.issued | 2001 | |
dc.identifier.uri | http://hdl.handle.net/11250/137318 | |
dc.description | Masteroppgave i informasjons- og kommunikasjonsteknologi 2001 - Høgskolen i Agder, Grimstad | en |
dc.description.abstract | The Serving GPRS Support Node (SGSN) is the most fundamental node in GPRS. Ericsson
produces and manages an increasing number of SGSN nodes in the world. SGSN nodes
require upgrades on software and hardware regularly, forcing restarts, which gives service
interrupts for subscribers.
This report presents four different upgrade strategies intended to avoid or minimize service
interrupts, while being cost-efficient: Hot standby, Subscriber based PCU routing, RA based
PCU routing, and Redundant links solutions.
The RA based PCU routing is considered the best, because it provides a smooth transfer of
subscribers from one SGSN to another on a routing area basis, but not under all
circumstances. It employs the Inter SGSN Routing Area Update (ISRAU) procedure to
transfer subscribers. The routing mechanism is based on existing technology, namely Point-
To-Point BVC connections bound to different Network Service Entities (NSEs) leading to
different SGSN nodes from each cell through the Packet Control Unit (PCU). | en |
dc.format.extent | 368220 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | en |
dc.publisher | Høgskolen i Agder | |
dc.publisher | Agder University College | |
dc.subject.classification | IKT590 | |
dc.title | GPRS for GSM upgrade strategies using network redundancy | en |
dc.type | Master thesis | en |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Systemutvikling og -arbeid: 426 | |