Mobility management for terminals with multiple subscriptions
First Claim
1. A method for managing mobile terminals having multiple subscriptions in a mobile environment, comprising:
- allocating a Universal Mobile Telecommunications Standard (UMTS) subscriber identity module for each subscription associated with a mobile terminal, each UMTS subscriber identity module (USIM) being identified by an identification code (USIM-ID) and having a unique set of authentication parameters;
performing a single mobility management procedure for multiple subscriptions, the single mobility management procedure being initiated by providing a single message and including a location area update procedure, the location area update procedure providing a single location area update request message;
sending authentication parameters from a network to service providers;
analyzing the authentication parameters to determine valid subscriptions for each UMTS subscriber identity module;
providing authentication data from the service providers to the network, the authentication data being used by the network for authenticating each UMTS subscriber identity module; and
sending a single authentication request to a mobile terminal, the single authentication request including authentication parameters for authentication of all UMTS subscriber identity modules identified by identification codes provided in the single location area update request message.
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Abstract
A scheme for providing mobility management for terminals with multiple subscriptions. The invention integrates Europe'"'"'s Universal Mobile Telecommunications Standard (UMTS) subscriber identity module—specific procedures into single procedures, and which uses a common TMSI. An UMTS subscriber identity module is allocated for each subscription associated with a mobile terminal, wherein each UMTS subscriber identity module being identified by a identification code. A location area update is performed by providing a single location area update request message comprising a list of identification codes for each UMTS subscriber identity module associated with the mobile terminal. Each USIM is authenticated separately, and some USIMs may fail, while others may succeed authentication. The terminal and network each build their own Ordered List of Registered USIM-IDs (OLRU) which records the USIMs that succeeded. The network assigns a Base TMSI, which is similar to the current assignment of TMSIs. Subsequent Location Area Update procedures use the Base TMSI, which is common to all USIMs in the OLRU. Thus it does not have to be repeated for each USIM. Paging Request uses the Base TMSI, along with a USIM Specifier (USIMS) field, which specifies which USIM(s) is being paged. USIMS is kept very compact with bit string coding, which also gives flexibility to page multiple USIMs at the same time. The terminal and network interpret the bit string by using the OLRU. The terminal has to listen to only one paging subchannel. The paging subchannel is determined by calculating the sum modulo N of the last digits of the USIM-IDs in the OLRU. N is the number of possible subchannels. The scheme applies to UMTS as well as GSM/GPRS, if GSM/GPRS is enhanced to support multiple subscriptions per terminal.
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Citations
61 Claims
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1. A method for managing mobile terminals having multiple subscriptions in a mobile environment, comprising:
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allocating a Universal Mobile Telecommunications Standard (UMTS) subscriber identity module for each subscription associated with a mobile terminal, each UMTS subscriber identity module (USIM) being identified by an identification code (USIM-ID) and having a unique set of authentication parameters;
performing a single mobility management procedure for multiple subscriptions, the single mobility management procedure being initiated by providing a single message and including a location area update procedure, the location area update procedure providing a single location area update request message;
sending authentication parameters from a network to service providers;
analyzing the authentication parameters to determine valid subscriptions for each UMTS subscriber identity module;
providing authentication data from the service providers to the network, the authentication data being used by the network for authenticating each UMTS subscriber identity module; and
sending a single authentication request to a mobile terminal, the single authentication request including authentication parameters for authentication of all UMTS subscriber identity modules identified by identification codes provided in the single location area update request message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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- 57. A mobile terminal having multiple subscriptions comprising a controller for providing mobility management, the controller allocating a Universal Mobile Telecommunications Standard (UMTS) subscriber identity module for each subscription associated with a mobile terminal, and performing a single mobility management procedure for multiple subscriptions, the single mobility management procedure being initiated by a single message, including a location area update procedure, the location area update procedure providing a single location area update request message, the single location area update request message includes a temporary mobile subscriber identity, and the controller obtaining at a mobile switching center currently handling the mobile terminal an ordered list of registered identification codes from a mobile switching center previously handling the mobile terminal, the ordered list of registered identification codes representing authenticated UMTS subscriber identity modules, wherein the temporary mobile subscriber identity is bound with the ordered list of registered identification codes and received by the controller.
Specification