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

TUP is an old protocol and may not be used in newer implementations.

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

Control Protocols IP Q. GSM, however, refers to more than just the “air interface”; it refers to the complete set of protocols. With CDMA, unique digital codes, rather than separate RF frequencies or channels, are used to differentiate subscribers. Is in charge of the radio part. Since each user is separated by a unique code, all users can share the same frequency band range of radio spectrum.

For more protocols related to cellular protocols see the following families: Figure shows this interface and protocol stack. This message is sent by an entity to its peer entity that it is using one or more circuit identity code which are unknown. BSS management application part. Based on spread spectrum theory, it gives essentially the same services and qualities as wireline service.


The primary difference is that access to the local exchange carrier LEC is provided via a wireless phone.

The messages are transparent to BSS except for a few exceptions. Table lists local operation codes and their functions. So two sets of protocols are used – Control Plane Protocols that control the calls and user plane protocols that carry the user’s data. ISUP is used for both speech and data call setup. 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.

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. Figure shows the protocol stack used on these interfaces. UE User Equipment The phone or modem. The connection-oriented services are used for dedicated procedures such as handover and assignment procedures. The codes are shared by both the mobile station cellular phone and the base station, and are called pseudo-random code sequences.

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

GsmProtocolFamily – The Wireshark Wiki

It employs a commercial adaptation of a military spread-spectrum technology. By the beginning ofthere were 1. For information on cellular and telecom protocol testing. Please don’t pee in the pool. The acronym was preserved but a new, English meaning was given to it later, once bdsmap potential of the technology was understood.


The HLR contains such data as the current roaming, redirection, and special services settings. See the License page for details. Request to start a trace of a single connection. See SS7 for a description of SS7 protocols. The GSM bsskap do not encourage the use of this interface and have not updated specifications for this interface since Release The digital nature of GSM allows data, both synchronous and asynchronous data, to protocil transported as a bearer service to or from an ISDN terminal.

The data rates supported by GSM are bps, bps, bps, bps, and bps. One or more Kbps timeslots are used to carry signaling information. CDMA is a spread spectrum technology, which means that it spreads the information contained in peotocol particular signal of interest over a much greater bandwidth than the original signal.

GSM A interface – BSS Application Part

Protocols The GSM protocol family consists of many protocols, and bsmsap protocols are conveyed on top of these. MS Mobile Set The phone or modem. CDMA has been used in many military applications, such as:. The B interface is an internal interface and is not visible in most implementations.

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