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Updating of the preferred roaming list (prl) in a sim (subscriber identity module) / ruim (removable user identity module) card.

A technology of mobile phones and smart cards, applied in the field of data update and roaming list, which can solve the problems of not wanting to wait too long

Active Publication Date: 2007-02-21
SCHLUMBERGER IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is no such restriction in CDMA (Code Division Multiple Access), from the user's point of view, it is not desirable to wait too long

Method used

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  • Updating of the preferred roaming list (prl) in a sim (subscriber identity module) / ruim (removable user identity module) card.
  • Updating of the preferred roaming list (prl) in a sim (subscriber identity module) / ruim (removable user identity module) card.
  • Updating of the preferred roaming list (prl) in a sim (subscriber identity module) / ruim (removable user identity module) card.

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Experimental program
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Effect test

Embodiment Construction

[0022] In order to simplify the description, the same elements shown in the figures have the same reference numerals.

[0023] figure 1 A system SYS is shown comprising a mobile phone ME coupled to a RUIM card CARD. In our example, the card CARD stores the list PRL. This example is not limiting; the PRL list may eg be stored in the mobile phone ME.

[0024] The system SYS also includes the server SERV. In our case, this server is the home network operator. Load the PRL list from this server into the SIM card. Downloading may be performed using, for example, over-the-air (OTA) technology.

[0025] figure 2 is an example of the communication between the coupled Mobile-Card and the server SERV.

[0026] In this figure, we see multiple SSPR commands.

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PUM

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Abstract

A method for updating files in a data processing system comprising a first file (Efprl) storing data information capable of being updated via a network, characterized in that said system comprises at least one (Efprl) a second file (Efmr) of the same structure, said second file (EFmr) storing updates of data information received from the network, and characterized in that, when the first file (Efprl) has to be updated, said method The step of renaming the second file (Efmr) with the name of the first file (Efprl) is included. In particular, the data processing system is a SIM card of a mobile phone and said file comprises a Preferred Roaming List (PRL).

Description

technical field [0001] The present invention relates to the updating of data stored in files contained in a data processing system. The present invention generally relates to processing a roaming list in a wireless communication system, and in particular relates to updating a preferred roaming list PRL (Preferred Roaming List). Typically, this list is stored in a SIM (Subscriber Identity Module) card or RUIM (Removable Subscriber Identity Module). [0002] PRL is a list defined in the specifications [S0023] and [0016] of CDMA (Code Division Multiple Access). These two documents are incorporated into the specification by reference. It allows operators to use OTAPA / SP commands to update over the air using the defined protocol [S0016]. The associated documentation is described in the [S0023] specification. Background technique [0003] Typically, the PRL list is a list of information that resides in memory on a smart card coupled to the mobile phone. This list is set by th...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04M1/725G06F9/445H04W88/02
CPCH04W88/02
Inventor 肯尼思·程托尼·拉姆
Owner SCHLUMBERGER IND INC