70 lines
2.0 KiB
Plaintext
70 lines
2.0 KiB
Plaintext
:gfdl-enabled:
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OsmoBSC CBSP Protocol Specification
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===================================
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Harald Welte <hwelte@sysmocom.de>
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== Introduction
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This document describes the CBSP interface of *OsmoBSC* as spoken on the
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BSC-CBC interface. Based on 3GPP TS 48.049 <<3gpp-ts-48-049>>, this document indicates
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which of the 3GPP specified CBSP messages and IEs are implemented
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according to 3GPP specifications, which of these are not or not fully
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implemented, as well as OsmoBSC-specific extensions to the CBSP
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interface not specified by 3GPP.
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For details on the standard CBSP messages and IE definitions,
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please refer to the 3GPP documents.
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.3GPP document versions referred to by this document
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[cols="20%,80%"]
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|===
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|3GPP TS 48.049 | version 12.0.0 Release 12
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|===
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.IETF documents referred to by his document
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[cols="20%,80%"]
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|===
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|IETF RFC 793 | Transmission Control Protocol
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|===
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== Overview
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The OsmoBSC BSC-CBC interface consists of CBSP messages transmitted over
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TCP.
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The default TCP destination port number is TCP port 48049; this can be
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changed by configuration, as described in the OsmoBSC user manual
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<<userman-osmobsc>> and/or VTY reference manual <<vty-ref-osmobsc>>.
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.TCP port numbers used by OsmoBTS Abis/IP
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[options="header",width="50%",cols="35%,65%"]
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|===
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|TCP Port Number|Usage
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|48049|CBSP
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|===
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OsmoBSC implements both _TCP server_ and _TCP client_ role; it is hence
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configurable whether the CBC establishes the TCP connection to the BSC
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(BSC in _TCP server_ role) or if the BSC establishes the TCP connection
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to the CBC (BSC in _TCP client_ role).
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Currently, only transport of TCP via IPv4 is implemented.
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Any IP-capable link-layer protocol implemented in the underlying Linux
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operating system can be used to transport the IP/TCP/CBSP of OsmoBSC.
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include::{srcdir}/cbsp/procedures.adoc[]
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include::{srcdir}/cbsp/messages.adoc[]
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include::./common/chapters/port_numbers.adoc[]
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include::./common/chapters/bibliography.adoc[]
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include::./common/chapters/glossary.adoc[]
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include::./common/chapters/gfdl.adoc[]
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