Soft changing of mobile communication system
First Claim
1. A subscriber identity changing (SIC) apparatus for at least one mobile communication system, said SIC apparatus comprising a processor and memory, said memory containing computer instructions executable by said processor wherein said SIC apparatus is operative to:
- initiate sending of an instruction to a mobile terminal, via a first mobile communication system to which the mobile terminal is attached, to change a subscriber identity from a first subscriber identity used in the first mobile communication system to a second subscriber identity for use in a second mobile communication system, wherein the mobile terminal is separate and distinct from said SIC apparatus and the mobile terminal is located remotely from said SIC apparatus,obtain information indicating that a functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, andinitiate a detachment procedure in the first mobile communication system in relation to the first subscriber identity after obtaining the information indicating that the functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, whereinsaid information indicating that a functional network connection exists between the mobile terminal and said serving node of the second mobile communication system comprises information indicating that a packet data protocol (PDP) context for the mobile terminal has been activated in the second mobile communication system.
1 Assignment
0 Petitions
Accused Products
Abstract
A subscriber identity is changed for a mobile terminal (10) through the initiation of a sending of an instruction to the mobile terminal (10), via a first mobile communication system (18, 30) to which the mobile terminal is attached, to change subscriber identity from a first subscriber identity (IMSI1) used in the first mobile communication system to a second subscriber identity (IMSI2) for use in a second mobile communication system, and the initiation, after obtaining knowledge of the mobile terminal having attached to the second mobile communication system based on the second subscriber identity, a detachment procedure in the first mobile communication system in relation to the first subscriber identity. The mobile terminal (10) receives the instruction to change, attaches to the second mobile communication system based on the second subscriber identity and detach from the first mobile communication system after having attached to the second mobile communication system.
-
Citations
27 Claims
-
1. A subscriber identity changing (SIC) apparatus for at least one mobile communication system, said SIC apparatus comprising a processor and memory, said memory containing computer instructions executable by said processor wherein said SIC apparatus is operative to:
-
initiate sending of an instruction to a mobile terminal, via a first mobile communication system to which the mobile terminal is attached, to change a subscriber identity from a first subscriber identity used in the first mobile communication system to a second subscriber identity for use in a second mobile communication system, wherein the mobile terminal is separate and distinct from said SIC apparatus and the mobile terminal is located remotely from said SIC apparatus, obtain information indicating that a functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, and initiate a detachment procedure in the first mobile communication system in relation to the first subscriber identity after obtaining the information indicating that the functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, wherein said information indicating that a functional network connection exists between the mobile terminal and said serving node of the second mobile communication system comprises information indicating that a packet data protocol (PDP) context for the mobile terminal has been activated in the second mobile communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for changing mobile communication system a mobile terminal is to communicate with, the method being performed in a subscriber identity changing (SIC) apparatus and comprising:
-
initiating sending of an instruction to the mobile terminal, via a first mobile communication system to which the mobile terminal is attached, to change subscriber identity from a first subscriber identity used in the first mobile communication system to a second subscriber identity for use in a second mobile communication system, obtaining information indicating that a functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, and initiating a detachment procedure in the first mobile communication system in relation to the first subscriber identity after obtaining the information indicating that the functional network connection exists between the mobile terminal and a serving node of the second mobile communication system, wherein the initiating of the detachment procedure is based on a packet data protocol context being activated in the second mobile communication system, and the mobile terminal is separate and distinct from said SIC apparatus and the mobile terminal is located remotely from said SIC apparatus. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A mobile terminal for communication with at least one mobile communication system, said mobile terminal comprising a radio circuit for communicating with a first and a second mobile communication system and being configured to:
-
receive, via a first mobile communication system to which the mobile terminal is attached, an instruction from a subscriber identity changing (SIC) apparatus to change subscriber identity from a first subscriber identity used in the first mobile communication system to a second subscriber identity for use in the second mobile communication system, wherein the SIC apparatus is separate and distinct from the mobile terminal, initiate activation of a packet data protocol (PDP) context in the second mobile communication system after receiving from the SIC apparatus the instruction to change subscriber identity, wherein the mobile terminal initiates the activation of the PDP context by transmitting an attach request to a serving node in the second mobile communication system, and receive from a serving node in the first mobile communication system a request to detach from the first mobile communication system, wherein the detaching is made after the packet data protocol context has been activated in the second mobile communication system. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
-
22. A method of changing communication from a first mobile communication system to a second mobile communication system, the method being performed in a mobile terminal and comprising:
-
receiving, via the first mobile communication system to which the mobile terminal is attached, an instruction from a subscriber identity changing (SIC) apparatus to change subscriber identity from a first subscriber identity used in the first mobile communication system to a second subscriber identity for use in a second mobile communication system, wherein the SIC apparatus is separate and distinct from the mobile terminal, initiating activation of a packet data protocol (PDP) context in the second mobile communication system after receiving from the SIC apparatus the instruction to change subscriber identity, wherein initiating the activation of the PDP context comprises the mobile terminal transmitting an attach request to a serving node in the second mobile communication system, and receiving from a serving node in the first mobile communication system a request to detach from the first mobile communication system, wherein the detaching is made after the packet data protocol context has been activated in the second mobile communication system. - View Dependent Claims (23, 24, 25, 26, 27)
-
Specification