EUIMID

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EUIMID (expanded UIMID) is a unique identifier for an R-UIM (Removable User Identity Module) or CSIM (CDMA SIM application) card in CDMA2000 cellular systems that replaces the older UIMID identifier. There are two forms of EUIMID, known as Short Form (SF_EUIMID) and Long Form (LF_EUIMID). Both produce a 32-bit pseudo-UIMID (pUIMID) with 0x80 in the upper 8 bits and the least significant 24 bits of the SHA-1 hash of the entire SF_EUIMID or the entire ICCID EF (for LF_EUIMID) in the lower 24 bits.

A UIMID is a 32-bit Electronic Serial Number (ESN) stored in a R-UIM or CSIM used for TDMA or CDMA2000 phones. It is given a different name to avoid confusion with the hardware ESN stored in the phone. In all known systems the UIMID displaces the ESN in signaling. Because the UIMID is allocated from the same numbering space as ESN its existence is transparent to the network. The reason the UIMID is transmitted instead of the ESN is because the card contains the MIN or IMSI and devices such as the HLR running the ANSI-41 mobility management protocol insist on a static association between these identifiers for subscription validation. The HLR will store the MIN or IMSI alongside the ESN in each record, and if an ANSI-41 message is received containing a different pair it will be rejected as invalid.

With reference to a given set of objects, a unique identifier (UID) is any identifier which is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. There are four main types of unique identifiers, each corresponding to a different generation strategy:

  1. serial numbers, assigned incrementally or sequentially
  2. random numbers, selected from a number space much larger than the maximum number of objects to be identified. Although not really unique, some identifiers of this type may be appropriate for identifying objects in many practical applications and are, with abuse of language, still referred to as "unique"
  3. names or codes allocated by choice which are forced to be unique by keeping a central registry such as the EPC Information Services.
  4. names or codes allocated using a regime involving multiple (concurrent) issuers of unique identifiers that are each assigned mutually exclusive partitions of a global address space such that the unique identifiers assigned by each issuer in each exclusive address space partition are guaranteed to be globally unique. Examples include (1) the media access control address MAC address uniquely assigned to each individual hardware network interface device produced by the manufacturer of the devices, (2) consumer product bar codes assigned to products using identifiers assigned by manufacturers that participate in GS1 identification standards, and (3) the unique and persistent Legal Entity Identifier assigned to a legal entity by one of the LEI registrars in the Global Legal Entity Identifier System (GLEIS) managed by the Global LEI Foundation (GLEIF).
CDMA2000

CDMA2000 is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea.

Contents

The EUIMID (and UIMID) are hardware identifiers that do not change throughout the life of the card they identify. Their most important characteristic is that they are globally unique, no two R-UIM or CSIM cards should ever be given the same number. Secondly, they can identify the issuer of the code (likely a mobile phone operator in the case of LF_EUIMID, and an R-UIM or CSIM card manufacturer in the case of SF_EUIMID). The pseudo-UIMID is not unique, but can satisfy most uses of UIMID. Where this is not possible, or not desirable, another unique identifier (such as EUIMID) should be used instead or the requirement for uniqueness should be removed.

Short Form EUIMID (SF_EUIMID)

The Short Form EUIMID is based on the 56-bit MEID and is allocated from the same numbering space by the current Global Hexadecimal Administrator (GHA), the TIA. This form requires new files within the R-UIM defined in 3GPP2 specification C.S0023-C v1.0 (or higher). [1] This was published by the TIA as TIA-820-C.

Telecommunications Industry Association american organization

The Telecommunications Industry Association (TIA) is accredited by the American National Standards Institute (ANSI) to develop voluntary, consensus-based industry standards for a wide variety of Information and Communication Technologies (ICT) products, and currently represents nearly 400 companies. TIA's Standards and Technology Department operates twelve engineering committees, which develop guidelines for private radio equipment, cellular towers, data terminals, satellites, telephone terminal equipment, accessibility, VoIP devices, structured cabling, data centers, mobile device communications, multimedia multicast, vehicular telematics, healthcare ICT, machine to machine communications, and smart utility networks.

The SF_EUIMID has the unique ability to override the phone’s own MEID in signaling. This is controlled by a flag inside the R-UIM stored in bit 2 of the UsgInd (Usage Indicator) elementary file (EF). This may make it easier to provision a R-UIM that is manufactured without other unique identifiers (such as MIN or IMSI). The tradeoff is that the phone hardware cannot be easily identified. This tradeoff was removed in 2008 by the ability to specify MEID or EUIMID in OTASP signaling and in 2009 by the addition of these options to the CDMA air interface StatusRequest message. The term MEID_ME is used to distinguish the hardware identity of the phone from the MEID protocol element that may be the EUIMID.

The mobile identification number (MIN) or mobile subscription identification number (MSIN) refers to the 10-digit unique number that a wireless carrier uses to identify a mobile phone, which is the last part of the international mobile subscriber identity (IMSI). The MIN is a number that uniquely identifies a mobile phone working under TIA standards for cellular and PCS technologies.. It can also be called the MSID or IMSI_S.

The international mobile subscriber identity or IMSI is a number that uniquely identifies every user of a cellular network. It is stored as a 64-bit field and is sent by the mobile device to the network. It is also used for acquiring other details of the mobile in the home location register (HLR) or as locally copied in the visitor location register. To prevent eavesdroppers from identifying and tracking the subscriber on the radio interface, the IMSI is sent as rarely as possible and a randomly-generated TMSI is sent instead.

Long Form EUIMID (LF_EUIMID)

The Long Form EUIMID is the ICCID that has been present in many generations of smart cards, including the SIM cards for GSM. This is composed of up to 18 BCD digits -- up to 72 bits. The storage allocated for the ICCID is, however, 80 bits, so it is recommended that the Luhn check digit be included plus a padding digit (0xf). Importantly, it is recommended in Version 2.0 of C.S0023-C [2] that the pseudo-UIMID is generated from all 80 stored bits.

GSM standard to describe protocols for second generation digital cellular networks used by mobile phones

The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December 1991.By the mid-2010s, it became a global standard for mobile communications achieving over 90% market share, and operating in over 193 countries and territories.

Binary-coded decimal class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight. Special bit patterns are sometimes used for a sign or for other indications (e.g., error or overflow)

In computing and electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight. Special bit patterns are sometimes used for a sign or for other indications.

The LF_EUIMID first became externally accessible in 2008 with OTASP specification C.S0066-0 v2.0. [3] In 2009, the CDMA air interface was also upgraded to the so-called 'Release E' which allows the transmission of all available identifiers in the StatusRequest message. If an R-UIM or CSIM with Expanded UIMID is inserted in a phone the identifier that is usually transmitted as the ESN protocol element over the radio interface is the 32-bit pseudo-UIMID.

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SIM card smart card for a mobile device

A subscriber identity module or subscriber identification module (SIM), widely known as a SIM card, is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices. It is also possible to store contact information on many SIM cards. SIM cards are always used on GSM phones; for CDMA phones, they are only needed for newer LTE-capable handsets. SIM cards can also be used in satellite phones, smart watches, computers, or cameras.

The International Mobile Equipment Identity or IMEI is a number, usually unique, to identify 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone, but can also be displayed on-screen on most phones by entering *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems.

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The Preferred Roaming List (PRL) is a database residing in a wireless device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM-based CDMA devices, the PRL resides on the R-UIM. The PRL indicates which bands, sub bands, and service provider identifiers will be scanned and in what priority order. Without a PRL, the device may not be able to roam, i.e. obtain service outside of the home area. There may be cases where missing or corrupt PRLs can lead to a customer not having service at all.

Universal integrated circuit card smart card

The universal integrated circuit card (UICC) is the smart card used in mobile terminals in GSM and UMTS networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes.

Authentication and Key Agreement (AKA) is a security protocol used in 3G networks. AKA is also used for one-time password generation mechanism for digest access authentication. AKA is a challenge-response based mechanism that uses symmetric cryptography.

The Reporting Body Identifier is the first two digits of a Global System for Mobile Communications (GSM) Type Allocation Code, and indicates the GSMA-approved organization that registered a given mobile device, and allocated the model a unique code.

Electronic serial numbers (ESNs) were created by the U.S. Federal Communications Commission (FCC) to uniquely identify mobile devices, from the days of AMPS in the United States starting in the early 1980s. The administrative role was taken over by the Telecommunications Industry Association in 1997 and is still maintained by them. ESNs are currently mainly used with CDMA phones, compared to International Mobile Equipment Identity (IMEI) numbers used by all GSM phones.

Removable User Identity Module

Removable User Identity Module is a card developed for cdmaOne/CDMA2000 ("CDMA") handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM (GSM) application, so it can work on both networks. It is physically compatible with GSM SIMs and can fit into existing GSM phones as it is an extension of the GSM 11.11 standard.

A mobile equipment identifier (MEID) is a globally unique number identifying a physical piece of CDMA2000 mobile station equipment. The number format is defined by the 3GPP2 report S.R0048 but in practical terms, it can be seen as an IMEI but with hexadecimal digits.

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A CDMA subscriber identity module (CSIM) is an application to support CDMA2000 phones that runs on a UICC, with a file structure derived from the R-UIM card. By porting the application to the UICC, a card with CSIM, SIM, and USIM can operate with all major cellular technologies worldwide. The CSIM application allows users to change phones by simply removing the smart card from one mobile phone and inserting it into another mobile phone or broadband telephony device supporting the CDMA2000 radio interface.

Subscriber Identity Module (SIM) card connector includes a connector body, the connector body defines a receptacle channel that extends inwardly from the front and the receptacle channel further defines a first hole and a second hole. Pluralities of terminals mount in the middle of the connector body; a switch terminal mounts in the connector body. The switch terminal has a fixing portion received in the first hole and a contacting portion received in the second hole, the contacting portion forms an arced surface, the top of the arced surface is inserted into the second hole and protrudes above the top surface of the housing base in the receiving cavity.

CDMA spectral efficiency refers to the system spectral efficiency in bit/s/Hz/site or Erlang/MHz/site that can be achieved in a certain CDMA based wireless communication system. CDMA techniques are characterized by a very low link spectral efficiency in (bit/s)/Hz as compared to non-spread spectrum systems, but a comparable system spectral efficiency.

References

  1. ↑ "C.S0023-C v1.0. Removable User Identity Module for Spread Spectrum Systems. 3GPP2. 2006" (PDF). Archived from the original (PDF) on 2007-09-27. Retrieved 2008-08-04.
  2. ↑ C.S0023-C v2.0. Removable User Identity Module for Spread Spectrum Systems. 3GPP2. 2008.
  3. ↑ C.S0066-0 v2.0. Over-the-Air Service Provisioning for MEID-Equipped Mobile Stations in Spread Spectrum Systems. 3GPP2. 2008. [ permanent dead link ]
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