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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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See the License page for details. Since each user is separated by a unique code, all users can share the same frequency band range of radio spectrum. For information on cellular and telecom protocol testing. CDMA is a spread spectrum technology, which ;rotocol that it spreads the information contained in a particular signal of interest over a much greater bandwidth than the original signal.

Please don’t pee in the pool. For more protocols related to protofol protocols see the following families: At the physical layer, it uses a 2-Mbps PCM30 link. The connection-oriented services are used for dedicated procedures such as handover and assignment procedures. A slave of the BSC from which it takes its configuration. GSM, however, refers to more than just the “air interface”; it refers to the complete set of protocols.

Sbsmap messages are transparent to BSS except for a few exceptions. See SS7 for a description of SS7 protocols. It authenticates the user in the network. The data rates supported by GSM are bps, bps, bps, bps, and bps. By progocol beginning ofthere were 1. Figure shows this interface and protocol stack.

GSM A interface – BSS Application Part

The radio link imposed some limitations, however, since the standard ISDN bit rate of 64 Kbps could not be practically achieved. Powered by MoinMoin and Python. MS Mobile Set 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 plenty of money out of calls made from stolen phones so they won’t do it unless forced.


Is in charge of the radio part. Control Protocols IP Q. The digital nature of GSM allows data, both synchronous and bssmap data, to be transported as a bearer service to or from an ISDN terminal. The B interface is an internal interface and is not visible in most implementations. So two sets of protocols are used – Control Plane Protocols that control the calls and user plane protocols that carry the user’s data.

Protocols The GSM protocol family consists of many protocols, and other pprotocol are conveyed on top of these.

GsmProtocolFamily – The Wireshark Wiki

Table lists local operation codes and their functions. With CDMA, unique digital codes, rather than separate RF frequencies or channels, are used to differentiate subscribers. TUP is an old protocol and may not be used in newer implementations. Direct transfer application part. These messages are partially processed by the BSC to add necessary information required for other entities to process these requests.

The DTAP data is user information and carries messages related to call control and mobility management between two users, i.

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

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 acronym was preserved but a new, English meaning was given to it later, once the potential of the technology was understood. The codes are shared by both the mobile station cellular phone and the base station, and are called pseudo-random code sequences.


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. ISUP is used for both speech and data call setup.

UE User Equipment The phone or modem. Request to start a trace of a single connection. The primary difference is that access to the local exchange carrier LEC is provided via a wireless phone. BSS management application part.

One or more Kbps timeslots are used to carry signaling information. The most basic teleservice supported by GSM is telephony.

It employs a commercial adaptation of a military spread-spectrum technology. Figure shows the protocol stack used on these interfaces. This message is sent by an entity to its peer entity that it is using one or more circuit identity code which are unknown. Based on spread spectrum theory, it gives essentially the same services and qualities as wireline service.

The GSM recommendations do not encourage the use of this interface and have not updated specifications for this interface since Release The HLR contains such data as the current roaming, redirection, and special services settings. Global System for Mobile communication GSM protocol protocop GSM is a technology for digital wireless telecommunications, represented by a decent number of specifications.

CDMA has been used in many military applications, such as:.