Ericsson Radio Systems AB PKRC1311004-1 Manual De Usuario
Terrestrial Link Handling
49
Terrestrial Link Handling
This function specification covers RBS functions for layer 2
communication on A-bis.
communication on A-bis.
The function Layer 2 Link Handling is used for layer 2 signalling to/
from RBS.
from RBS.
49.1
References
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
please refer to the table of contents to find the appropriate chapter.
49.2
Concepts
Operation and Maintenance Link
Layer 2 communication link for operation
and maintenance services on A-bis.
and maintenance services on A-bis.
Radio Signalling Link
Layer 2 communication link for traffic
services on A-bis.
services on A-bis.
49.3
Function
49.3.1
Layer 2 Link Handling of OML and RSL
The link layer used for signalling on the A-bis interface between BSC
and BTS is established and maintained according to Technical
Specification /GSM 08.56/.
and BTS is established and maintained according to Technical
Specification /GSM 08.56/.
LAPD (Link Access Protocol on the D-channel) is used for layer 2
signalling. Signalling conforms to /GSM 08.56/.
signalling. Signalling conforms to /GSM 08.56/.
49.4
Operational Conditions
49.4.1
Operation and Maintenance
Maintenance functions relating to definition of layer 2 address (TEI) are
described within the context of Operation and Maintenance Terminal.
described within the context of Operation and Maintenance Terminal.
49.4.2
Capabilities
Not applicable.
EN/LZT 720 0008
R1A
2001-06-26
373 (421)
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