Browse Prior Art Database

Network Operator Controlled Mobile Terminal Timer for the Purpose of Triggering a System Reselection

IP.com Disclosure Number: IPCOM000103541D
Published in the IP.com Journal: Volume 5 Issue 4 (2005-04-16)
Included in the Prior Art Database: 2005-Apr-16
Document File: 1 page(s) / 18K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The connectivity of mobile user equipment is constantly increasing. A mobile terminal can either use the GSM network or, if present, a network with the wireless standard (WLAN) to access the provided services. This feature is useful for example in places where no GSM network is available. Then the mobile terminal uses the WLAN interface for its incoming and outgoing traffic. In this case, present implementations do not allow the cellular phone to fall-back to its original network, i.e. the GSM network. It keeps using the WLAN network even when its original network (the GSM network) is operational and available again. It is proposed to define a timer value and to integrate a countdown-timer into the mobile terminal. The timer value represents either an absolute value (e.g. X seconds) or a bit pattern referring to predefined absolute values. The timer resides physically in the Universal Subscriber Identity Module (USIM) placed in the Universal Integrated Circuit Card (UICC) or in the Mobile Equipment (ME), e.g. for terminals without an USIM. If the mobile terminal starts using a "guest"-network (e.g. WLAN) the countdown-timer is initialized with the timer value. Then the countdown timer starts counting backwards. If the countdown expires (i.e. it has counted to zero) the mobile terminal will try to switch-back to the original network. If the switch-back fails the countdown-timer is initialized with the timer value again.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 66% of the total text.

Page 1 of 1

S

Network Operator Controlled Mobile Terminal Timer for the Purpose of Triggering a System Reselection

Idea: Enric Mitjana, DE-Munich

The connectivity of mobile user equipment is constantly increasing. A mobile terminal can either use the GSM network or, if present, a network with the wireless standard (WLAN) to access the provided services. This feature is useful for example in places where no GSM network is available. Then the mobile terminal uses the WLAN interface for its incoming and outgoing traffic. In this case, present implementations do not allow the cellular phone to fall-back to its original network, i.e. the GSM network. It keeps using the WLAN network even when its original network (the GSM network) is operational and available again.

It is proposed to define a timer value and to integrate a countdown-timer into the mobile terminal. The timer value represents either an absolute value (e.g. X seconds) or a bit pattern referring to predefined absolute values. The timer resides physically in the Universal Subscriber Identity Module (USIM) placed in the Universal Integrated Circuit Card (UICC) or in the Mobile Equipment (ME), e.g. for terminals without an USIM. If the mobile terminal starts using a "guest"-network (e.g. WLAN) the countdown-timer is initialized with the timer value. Then the countdown timer starts counting backwards. If the countdown expires (i.e. it has counted to zero) the mobile terminal will try to switch- back to the original networ...