Browse Prior Art Database

Background scan mechanism whereby a PLMN is able to instruct a capable mobile terminal to perform regular attempts

IP.com Disclosure Number: IPCOM000125707D
Original Publication Date: 2005-Jul-10
Included in the Prior Art Database: 2005-Jul-10
Document File: 2 page(s) / 30K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

With increasing variety of connectivity (available in end devices offering access to the public network a user is subscribed to) network operators have major interest in shaping the decision about the access network to be used. This has an impact on the services that can be provided and its quality. It does also impact the cost of the provision of these services. Modifying the access technology and/or the access network operator used by the mobile device to access the operator's network in a "controlled" way is becoming Key in reliable and efficient service provisioning. Until now, the access to subscriber's operator network was tied to a particular access technology, e.g. GSM (Global System of Mobile Communication) technology for access to the voice calls subscription or ADSL (Asymmetric Digital Subscriber Line) technology for the Internet surfing subscription at home. With the advent of UMTS (Universal Mobile Telecommunication Standard), PLMN (Public Land Mobile Network) operators are faced with the situation to handle access to their services over their two access technologies GSM and UMTS. Since UMTS reuses the same core network and has been designed by the "GSM community", the network selection procedures were just slightly modified to embrace this new GSM-friendly technology.

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Background scan mechanism whereby a PLMN is able to instruct a capable mobile terminal to perform regular attempts

Idea: Enric Mitjana, DE-Munich

With increasing variety of connectivity (available in end devices offering access to the public network a user is subscribed to) network operators have major interest in shaping the decision about the access network to be used. This has an impact on the services that can be provided and its quality. It does also impact the cost of the provision of these services. Modifying the access technology and/or the access network operator used by the mobile device to access the operator's network in a "controlled" way is becoming Key in reliable and efficient service provisioning.

Until now, the access to subscriber's operator network was tied to a particular access technology, e.g. GSM (Global System of Mobile Communication) technology for access to the voice calls subscription or ADSL (Asymmetric Digital Subscriber Line) technology for the Internet surfing subscription at home. With the advent of UMTS (Universal Mobile Telecommunication Standard), PLMN (Public Land Mobile Network) operators are faced with the situation to handle access to their services over their two access technologies GSM and UMTS. Since UMTS reuses the same core network and has been designed by the "GSM community", the network selection procedures were just slightly modified to embrace this new GSM-friendly technology.

In its release 6, 3GPP is working on the interworking of Wireless Local Area Networks (WLAN) with 3GPP networks. The intention is to be able to access 3GPP networks and its services over WLAN access networks from a device that has WLAN capabilities. This is a major change with respect to the UMTS-GSM case since, normally, the WLAN network will not be controlled by the 3GPP operator and was designed with other objectives in mind as to be a means of access to a PLMN. Thus interworking procedures for the WLAN access network operator selection is presently being defined in 3GPP.

The technical specification T22.234 describes the network selection procedures to be followed for accessing an interworked WLAN (I-WLAN). This applies only for the initial selection procedures. Nowhere, in the 3GPP specification, mechanisms are defined for the PLMN to be able to trigger a scan of the radio surroundings of the mobile terminal for this particular RAT (Radio Access Technology).

This idea proposes means to extend the concept of "background scan" to other RATs that are not part of the 3GPP-defined access technologies (e.g. UTRAN, GERAN) but that are used by 3GPP subscribers to access the services of their Public Land Mobile Network (PLMN) operator. An example of such RAT is a WLAN using the IEEE802.11 standard. It is also proposed to define a parameter for allowing the PLMN operator to trigger a background scan of a RAT that is used for interworking purposes (e.g. a WLAN).

Another part of this idea is the definition of a fiel...