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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Direct transfer application part. With CDMA, unique digital codes, rather than separate RF frequencies or channels, are used to differentiate subscribers.

Table lists local operation codes and their functions. Please don’t pee in the pool. See SS7 for a description of SS7 protocols. Based on spread spectrum theory, it gives essentially the same services and qualities as wireline service.

Protocols The GSM protocol family consists of many protocols, protocop other protocols are conveyed on top bsssmap these. The primary difference is that access to the local exchange carrier LEC is provided via a wireless phone. One or more Kbps timeslots are used to carry signaling information. It employs a commercial adaptation of a military spread-spectrum technology. Since each user is separated by a unique code, all users can share the same frequency band range of radio spectrum.

Is in charge of the radio part. MS Mobile Set The phone or modem.

TUP is an old protocol and may not be used in newer implementations. See the License page for details. The most basic teleservice supported by GSM is telephony. 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.


The messages are transparent to BSS except for a progocol exceptions. This message is sent to in response of a message which can not be treated correctly by the receiving entity and for which another failure message can not substitute. Figure shows the protocol stack used on these interfaces. BSS management application part.

ISUP is bssnap for both speech and data call setup. This message is sent by an entity to its peer entity that it is using one or more circuit identity code which are unknown.

Figure shows this interface and protocol stack. Powered by MoinMoin and Python. Control Protocols IP Q. MAP relies on TCAP capabilities to establish non-circuit-related communication between two entities in the signaling network to exchange data and control information.

GSM Interfaces and Protocols (Global System for Mobile Communication (GSM)) Part 3

The codes are shared by both the mobile station cellular phone and the base station, and are called pseudo-random code sequences. For information on cellular and telecom protocol testing. 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. It authenticates the user in the network. UE User Equipment The phone or modem.

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 pgotocol of money out of calls made from stolen phones so they won’t do it unless forced.

The connection-oriented services are used for dedicated procedures such as handover and assignment procedures. Global System for Mobile communication GSM protocol family GSM is a technology for digital wireless telecommunications, represented by a decent number of specifications.

The GSM recommendations do not encourage the use of this interface and have not updated specifications for this interface since Release Request to start a trace of a single connection.


These messages are partially processed by the BSC to add necessary information required for other entities to pdotocol these requests.

GSM A interface – BSS Application Part

The acronym was preserved but a new, English meaning was given to it later, once the potential of the technology was understood. So two sets of protocols are used – Control Plane Protocols that control the calls and user protocool protocols that carry the user’s data.

CDMA has been used in many military applications, such as:. The radio link imposed some limitations, however, since the standard ISDN bit rate of 64 Kbps could not be practically achieved.

Global System for Mobile communication (GSM) protocol family

The data rates supported by GSM are bps, bps, bps, bps, and bps. The DTAP data is user information and carries messages related to call control and mobility management between two users, i. A slave of the BSC from which it takes its configuration. For more protocols related to cellular protocols see the following families: At the physical layer, it uses a 2-Mbps PCM30 link.

The B interface is an internal interface and is not visible in most implementations. By the beginning ofthere were 1. GSM, however, refers to more than just the “air interface”; it refers to the complete proyocol of protocols. The HLR contains such data as the current roaming, redirection, and special services settings.