The BSSMAP protocol was extended to be able to negotiate per-call IP/Port To capture protocol traffic with Wireshark when connected via OsmoSTP use port. Handling of Abnormal Events Related to the BSSAP Header. MS are identified as DTAP by the Protocol Discriminator Information Element. BSSMAP-LE PERFORM LOCATION ABORT message. If the SMLC cannot proceed with positioning due to some protocol violation or error condition (e.g.

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The messages are transparent to BSS except for a few exceptions. EIR Equipment Information Registry Keeps track of Mobile Phones; it could be used to find stolen equipment if operators were forced to use it they make plenty of money out of calls made from stolen phones so they won’t do it unless forced. The radio link imposed some limitations, however, since the standard ISDN bit rate of 64 Kbps could not be practically achieved.

A slave of the BSC from which it takes its configuration. The B interface is an internal interface and is not visible in most implementations. See SS7 for a description of SS7 protocols. By the beginning ofthere were 1. The HLR contains such data bxsmap the current roaming, redirection, and special services settings.

This message is sent to in response of a message which can not be potocol correctly by the receiving entity and for which another failure message can not substitute.

Powered basmap MoinMoin and Python. CDMA is a spread spectrum technology, which means that it spreads the information contained in a particular signal of interest over a much greater bandwidth than the original signal.

Request to start a trace of a single connection. The connection-oriented services are used bdsmap dedicated procedures such as handover and assignment procedures. These messages are partially processed by the BSC to add necessary information required for other entities to process these requests. The GSM recommendations do not encourage the use of this interface and have not updated specifications for this interface since Release With CDMA, unique digital codes, rather than separate RF frequencies or channels, are used to differentiate subscribers.


This message is sent by an entity to its peer entity that it is using one or more circuit identity code which are unknown. TUP is an old protocol and may not be used in newer implementations. Please don’t pee in the pool. The primary difference is that access to the local exchange carrier LEC is provided via a wireless phone.

A-Interface – Cellular Network Infrastructure – Open Source Mobile Communications

Protocols The GSM protocol family prtoocol of many protocols, and other protocols are conveyed on top of these. Is in charge of the radio part. It employs a commercial adaptation of a military spread-spectrum technology.

Figure shows this interface and protocol stack. The acronym was preserved but a new, English meaning was given to it later, once the potential of the technology was understood.

ISUP is used for both speech and data call setup. Figure shows the protocol stack used on these interfaces.

The digital nature of GSM allows data, both synchronous and asynchronous data, to be transported as a bearer service to or from an ISDN terminal.

BSS management application part. UE User Equipment The phone or modem. Global System for Mobile communication GSM protocol family GSM is a technology for digital wireless telecommunications, represented prohocol a decent number of specifications.

For information on cellular and telecom protocol testing. MAP relies on TCAP capabilities to establish non-circuit-related communication between two entities in the signaling network to exchange data and control information.


The codes are shared by both the mobile station cellular phone and the base station, and are called pseudo-random code sequences. Table lists local operation codes and their functions. At the physical layer, it uses a 2-Mbps PCM30 link.

The DTAP data is user information and carries messages related to call control and mobility management between two users, i. Since each user is separated by a unique code, all users can share the same frequency band range of radio spectrum. It authenticates the user in the network.

GSM A interface – BSS Application Part

The most basic teleservice supported by GSM is telephony. Control Protocols IP Q. CDMA has been used in many military applications, such as:. One or more Kbps timeslots are used to carry signaling information.

Direct transfer application part. Based on spread spectrum theory, it gives essentially the same services and qualities as wireline service. GSM, however, refers to more than just the “air interface”; it refers to the complete set of protocols.

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The data rates supported by GSM are bps, bps, bps, bps, and bps. MS Mobile Set The phone or modem. For more protocols related to cellular protocols see the following families: So two sets of protocols are used – Control Plane Protocols that control the calls and user plane protocols that bssmwp the user’s data.