DE102015015735A1 - Subscriber identity module with multiple profiles and heap memory - Google Patents

Abstract

The invention provides a subscriber identity module (eUICC), comprising: a processor and a heap memory allocated to the processor, and one or more, preferably at least two, profiles (Pr1, Pr2) for the use of a mobile terminal in which the subscriber identity module (eUICC ) is operated in mobile networks. The subscriber identity module (eUICC) further comprises, for each profile (Pr1, Pr2) included in the subscriber identity module (eUICC), a separate heap memory (H1, H2) accessible only to the respective profile (Pr1, Pr2).

Description

Field of the invention

The invention relates to a subscriber identity module having at least two subscription profiles and a heap memory.

To use a mobile device such as smartphones or mobile phone in a mobile operator network, the terminal includes a subscriber identity module with a subscription profile or just profile. The subscription profile is formed by a record that allows the establishment, operation and removal of a connection of the terminal in the mobile network, and includes, for example, a cryptographic authentication key Ki and an International Mobile Subscriber Identity IMSI. The subscriber identity module may be configured as either a removable plug-in SIM (Subscriber Identity Module) or USIM (Universal SIM) or UICC (Universal Integrated Circuit Card) or, alternatively, a fixed eICIC (embedded UICC) or eSIM or eUSIM.

State of the art

Meanwhile, subscriber identity modules with multiple subscription profiles are also being produced. In order to keep the terminal clearly addressable at any time, only a single profile in an active "enabled" state is preferred at any time. Further profiles contained in the subscriber identity module are in an inactive "disabled" state.

The document [1] SGP02-Remote-Provisioning-Architecture-for-Embedded-UICC-Technical-Specification-v2.0,13 October 2014, GSMA describes provisioning or, equivalently, remote maintenance of profiles in a subscriber identity module in the form of an eUICC. By means of commands, an external server, namely the Sub Man Secure Routers SM-SR, to dos, which is an external server, namely the Sub Man Secure Router SM-SR, to a privileged instance within the eUICC, namely the Issuer Security Domain Root ISD-R (ISD-Root) sends, can execute functions in the eUICC. This implements the contents of the remote maintenance in the eUICC. [1] Chap. 3 describes the creation of a new profile P in an eUICC.

In general, a heap memory is used by executable code, thus in particular also for profiles on subscriber identity modules. Conventionally, a subscriber identity module has exactly one heap memory for the entire subscriber identity module.

Deleting profiles can result in heap memory fragmentation. Defragmentation, which is well-known in the art, such as defragmentation garbage collection, can be used to eliminate fragmentation. If only one is deleted for a multiple subscriber profile identity module, only a small portion of the memory for profiles is affected by the deletion. Nonetheless, fragmentation impacts the entire heap memory.

The document EP 2151 762 B1 discloses a volume, e.g. As a Java Card, with a first and a second memory management. The first memory management is z. As a garbage collection, for stored in a first memory area 54, referenced objects. The second memory management is responsible for non-referenced or only from the heap memory (stack) referenced stored in a second memory area 56 objects.

The document US 2005/0198088 A1 discloses a garbage collection method on heap memory partitioned into heap blocks, with garbage collection running in parallel on multiple heap blocks.

Summary of the invention

The invention is based on the object to provide a subscriber identity module with multiple profiles, which allows more efficient defragmentation method for deleting profiles.

The object is achieved by a subscriber identity module according to claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

The subscriber identity module according to the invention according to claim 1 comprises: a processor and a heap memory allocated to the processor; it comprises one or more, preferably at least two, profiles for the use of a mobile terminal in which the subscriber identity module is operated, in mobile radio networks, or is set up at least for receiving at least second profiles. The subscriber identity module is characterized in that the subscriber identity module comprises for each profile included in the subscriber identity module a separate heap memory accessible only to the respective profile. Through profile actions such as profile deletion or profile download generated memory changes, eg. For example, fragmentation in heap memory is reflected only in the heap memory of the affected profile, but not in the total memory available for heap memory of profiles. Defragmentation therefore only needs to be applied to the heap memory of the affected profile.

Therefore, according to claim 1, a subscriber identity module is provided which enables more efficient defragmentation method for deleting profiles.

• – eine Profil-Bearbeitungs-Einrichtung, eingerichtet, um im Teilnehmeridentitätsmodul umfasste Profile zu bearbeiten, und
• – eine Speicherbereinigungseinrichtung, umfassend für jeden Heap-Speicher eine gesonderte Profil-Speicherbereinigung, und eingerichtet, um nach einem Bearbeiten eines Profils den dem Profil zugeordneten Heap-Speicher zu bereinigen, insbesondere zu defragmentieren, und an Heap-Speichern anderer Profile kein Bereinigen durchzuführen.

The subscriber identity module optionally further comprises:

• A profile editor set up to edit profiles included in the subscriber identity module, and
• A garbage collector, comprising for each heap a separate profile garbage collection, and arranged to after editing a profile to clean up the heap associated with the profile, in particular to defragment, and to perform heaping of other profiles no cleanup.

The garbage collector, in particular the respective profile garbage collection, thus only cleans up the heap memory of its own profile and leaves the heap memory of other profiles untouched. This speeds up garbage collection and reduces memory wear.

Optionally, a deletion of the profile is provided as the processing, wherein the garbage collection device, in particular the respective separate profile garbage collection, is further configured to delete the heap memory of the profile after deleting the profile. This completely prevents the emergence of fragmentation in the heap memory.

Optionally, the profiles each comprise objects and is provided as a deletion of one or more individual objects of the profile, wherein the garbage collection device is set up, in particular the respective profile garbage collection, after deleting the objects only the heap memory of the affected profile defragment.

Optionally, an Issuer Security Domain Root (ISD-R) is provided as a profile processing device, that is, the default communication partner in the subscriber identity module for the Sub Man Secure Router.

Optionally, a separate garbage collection assigned to the respective profile is provided as the garbage collection device, more precisely as the respective profile garbage collection.

• – die Profil-Bearbeitungs-Einrichtung dazu eingerichtet ist, das jeweilige Profil unter Zugriff auf die dem Profil zugehörige Issuer Security Domain zu bearbeiten, und
• – die Speicherbereinigungseinrichtung, insbesondere die jeweilige Profil-Speicherbereinigung, dazu eingerichtet ist, von der dem Profil zugehörigen Issuer Security Domain Information über ein Bearbeiten des Profils zu empfangen und das Bereinigen des Heap-Speichers unter Verwendung der von der Issuer Security Domain des Profils empfangenen Information durchzuführen.

Optionally, each profile includes an issuer security domain associated with the profile, wherein

• - the profile editing facility is set up to edit the respective profile by accessing the Issuer Security Domain associated with the profile, and
• - The garbage collection device, in particular the respective profile garbage collection, is adapted to receive from the Issuer Security Domain information associated with the profile about editing the profile and to clean up the heap memory using the information received from the issuer security domain of the profile perform.

Optionally, the heap memory are arranged in such a total for the heap memory available total memory that a gentle, in particular as low or / and as uniform as possible, wear of the total memory in the heap memory is achieved. In particular, the heap memories may be provided dynamically in varying memory areas of the total memory.

Optionally, the garbage collection device is set up, and in particular the separate profile garbage collections are arranged to arrange the heap memory in a total memory available for the heap memory in such a way that it is as gentle as possible, in particular as low as possible and / or as even as possible , Total memory wear is achieved in the heap memory area, ie. As a wear leveling on the total memory.

Brief description of the drawings

In the following the invention will be explained in more detail with reference to exemplary embodiments and with reference to the drawing, in which:

1 a subscriber identity module with three profiles, according to an embodiment of the invention.

Detailed description of embodiments

1 shows a subscriber identity module eUICC with two profiles Pr1, Pr2, according to an embodiment of the invention. The two profiles Pr1 and Pr2 each include a profile-specific issuer security domain ISD-P1 or ISD-P2. There may be additional profiles in the subscriber identity module eUICC.

In the 1 Issuer Security Domain Root ISD-R, which is also shown, is set up as an end point, located in the subscriber identity module eUICC, of the channel provided for provisioning the subscriber identity module between the submanuable router SM-SR and the subscriber identity module eUICC. The issuer security domain ISD-R initiates an editing, in particular deletion, of profiles Pr1, Pr2,.... Individual objects of a profile Pr1, Pr2, ... can also be deleted via the Issuer Security Domain Root ISD-R.

Editing profiles can create memory holes, in other words, the memory becomes fragmented. In particular, the heap memory can get memory holes.

According to the invention, the first profile Pr1 is assigned a first heap memory H1 and the second profile Pr2 is assigned a second heap memory H2. Only objects of the first profile Pr1 are stored on the first heap memory H1. Only objects of the second profile Pr2 are stored on the second heap memory H2. The first heap H1 is under cleansing administration of a first garbage collection or garbage collection GC1. The second heap H2 is under cleansing management of a second garbage collection or garbage collection GC2.

If an object is deleted in the first profile, thereby creating a memory hole in the first heap memory H1, only the first heap memory H1 needs to be cleaned up by the first garbage collector GC1. The second heap H2 is not affected by the editing and therefore does not need to be cleaned up. The first garbage collection GC1 is set up so that it has no access to the second heap H2. In particular, if the first profile is completely deleted, the first heap memory is completely deleted, thereby avoiding any fragmentation from the outset.

For processing the second profile Pr2, the above applies analogously.

Cited prior art

• [1] SGP02-Remote-Provisioning-Architecture-for-Embedded-UICC-Technical-Specification-v2.0,13 October 2014, GSMA
• [2] ETSI 102 221 v4.16.0, 2007-07
• [3] EP 2 151 762 B1
• [4] US 2005/0198088 A1

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2151762 B1 [0007, 0029]
• US 2005/0198088 A1 [0008, 0029]

Cited non-patent literature

• SGP02-Remote-Provisioning-Architecture-for-Embedded-UICC-Technical-Specification-v2.0,13 October 2014, GSMA [0004]
• SGP02 Remote Provisioning-Architecture-for-Embedded-UICC-Technical-Specification-v2.0,13 October 2014, GSMA [0029]
• ETSI 102 221 v4.16.0, 2007-07 [0029]

Claims (9)

Subscriber identity module (eUICC), comprising: - a processor and a heap memory allocated to the processor, - one or more, preferably at least two, profiles (Pr1, Pr2) for the use of a mobile terminal in which the subscriber identity module (eUICC) is operated , in mobile radio networks, and in the case of only one profile at least set up to receive at least two profiles, characterized in that - the subscriber identity module (eUICC) for each in the subscriber identity module (eUICC) profile (Pr1, Pr2) a separate, only the respective profile (Pr1, Pr2) accessible heap memory (H1, H2). The subscriber identity module (eUICC) of claim 1, further comprising: A Profile Editing Facility (ISD-R), arranged to edit profiles included in the Subscriber Identity Module (eUICC), and A memory scrubber (GC1, GC2) comprising for each heap memory (H1, H2) a separate profile garbage collector (GC1, GC2) and arranged to, after editing a profile (Pr1, Pr2), match the profile (Pr1 Pr2) heap memory (H1; H2) to be cleaned up, in particular to defragment, and at Heap Store (H2; H1) of other profiles (Pr2; Pr1) to perform no cleaning. Subscriber Identity Module (eUICC) according to claim 2, wherein a deletion of the profile (Pr1, Pr2) is provided as editing, and wherein the memory scrubber (GC1, GC2) is further adapted to delete the profile after deleting the profile (Pr1, Pr2). Memory (H1, H2) of the profile (Pr1, Pr2) to delete. Subscriber identity module (eUICC) according to claim 2, wherein as an editing deletion of one or more individual objects of the profile (Pr1, Pr2) is provided, and wherein the garbage collection device (GC1, GC2) is adapted to the heap after deleting the objects Memory (H1, H2) of the profile (Pr1, Pr2) to defragment. Subscriber Identity Module (eUICC) according to one of claims 2 to 4, wherein as a profile editing device, an Issuer Security Domain Root (ISD-R) is provided. Subscriber identity module (eUICC) according to one of claims 2 to 5, wherein as garbage collection device (GC1, GC2) each one of the respective profile (Pr1, Pr2) associated garbage collection is provided. Subscriber identity module (eUICC) according to one of claims 2 to 6, wherein each profile comprises an Issuer Security Domain (ISD-P1, ISD-P2) associated with the profile, and wherein The profile processing device (ISD-R) is set up to process the respective profile (Pr1, Pr2) by accessing the Issuer Security Domain (ISD-P1, ISD-P2) associated with the profile, and The garbage collector (GC1, GC2) is set up to receive information about editing the profile (Pr1, Pr2) from the issuer security domain associated with the profile (ISD-P1, ISD-P2) and to purge the heap memory ( H1, H2) using the information received from the issuer security domain (ISD-P1, ISD-P2) of the profile (Pr1, Pr2). Subscriber identity module (eUICC) according to one of claims 1 to 7, wherein the heap memory (H1, H2) are arranged in such a total for the heap memory (H1, H2) available total memory that as gentle as possible, in particular as possible low or / and as uniform as possible, wear of the total memory in the heap memory (H1, H2) is achieved. Subscriber Identity Module (eUICC) according to one of claims 2 to 7, wherein the garbage collection device (GC1, GC2) is adapted, in particular the separate profile garbage collections (GC1; GC2) are arranged to the heap memory (H1, H2) in one to arrange total memory available for the heap memory (H1, H2) in such a way as to achieve as gentle as possible, in particular the lowest possible and / or as uniform as possible, wear of the total memory in the heap memory (H1, H2) area.

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