14-08-2012, 10:54 AM
A9130 BSC Evolution Functional Description
[attachment=31398]
1.1 A9130 BSC Overview
The A9130 BSC performs the following functions:
It provides GSM facilities for circuit switched mobile traffic and GPRS
facilities to allow the transfer of data in packets
It manages the radio resources and radio parameters
The BSC shares resources between circuit switched and packet switched
traffic, according to configuration parameters.
It shields the MSC and the MFS from the radio information, and performs
switching between the radio Traffic Channels (TCHs) and the terrestrial
channels, to the MSC and the MFS.
It manages transmission equipment by performing fault management
and correlation.
From a transmission point of view, the A9130 BSC also performs a
concentration function, therefore allowing more radio TCHs to be connected
to the A9130 BSC than terrestrial channels to the MSC.
The following figure provides an overview of the A9130 BSC in the BSS.
Ater Mux
Interface
BSC Site MSC Site
BSS
Abis
Interface
A Interface
BSS/OMC−R
Interface
BSS/CBC
Interface
Gb Interface Optional Link
Optional Link
BTS
BSC
BSC
Terminal
MFS
SGSN
OMC−R
TC MSC
CBC
BTS
TM
Terminal
SAGI
A−GPS server
BTS : Base Transceiver Station
CBC : Cell Broadcast Center
OMC-R : Operations and Maintenance Center-Radio
SGSN : Serving General Packet Radio Service Support Node
TM : Transmission
A-GPS : Assisted GPS
SAGI : SMLC A-GPS Interface
BSS : Base Station Subsystem
MSC : Mobile Switching Center
MFS : Multi Function Server
TC : Transcoder
Figure 1: The A9130 BSC in the BSS
10 / 68 3BK 20982 AA TQZZA Ed.03
1 A9130 BSC Overall Description
The A9130 BSC performs the following telecommunication, transmission
and O&M functions:
Provides signaling links to the MSC
Performs signaling control for the BTS and the Mobile Stations (MS)
Performs signaling control for the MFS links
Switches traffic between the MSC and the BTS
Routes traffic between the MFS and the BTS
Provides O&M facilities.
1.2 A9130 BSC Hardware Architecture
The following figure shows the BSC Hardware (HW) architecture on an ATCA
platform.
SSW
(duplicated)
Radio Network links
External Ethernet Links
LIU Shelf
(21 slots)
E1
CCPy
TPr
TP
Mux
LIU
1
LIU n
ATCA Shelf (14 slots)
CCP
OMCPw
OMCPr
r : Redundancy
W : Working
N and y : Network Element capacity
Figure 2: A9130 BSC HW Architecture
3BK 20982 AA TQZZA Ed.03 11 / 68
1 A9130 BSC Overall Description
The following table describes the A9130 BSC functional blocks and boards.
Name Functional block mapped on board Existing function for BSC
SSW: Gigabit Ethernet switch (in
ATCA shelf)
Allows exchanges between all the
elements of the platform and external
IP/Ethernet equipment:
Performs Gigabit Ethernet
switching at the shelf level
Performs powerful monitoring for
the user plane and control plane
(Gigabit Ethernet on front panel)
Ensures daisy chain with other
shelves via two 1 Gigabit Ethernet
ports (only one is used)
Ensures multicast function
Allows several external Ethernet
10/100/1000 Base T connections:
OMC-R, CBC, LCS, Debug
Implements 12 non blocking
1Gigabit Ethernet links via
backplane connections
...
The SSW board and all the
connections to the switch are
duplicated to overcome board or
connection failures.
OMC-R physical interface
CBC physical interface
Monitoring
NEM terminal connection
OMCP: O&M Control Processing
board (in ATCA shelf)
Is based on ATCA technology
equipped with a permanent storage
device. It manages the platform as
system manager, and manages O&M
applications.
OMCP boards operate in
active-standby mode following
the 1+1 redundancy model.
O&M logical interface to the
Operation and Maintenance
Center (OMC-R)
VCPR: S-CPR & O-CPR
software + TCH/RM
TSC software
CCP: Control Processing board (on
ATCA shelf)
Is based on ATCA technology used
for call control functions. Identical to
the OMCP board but without a hard
disk.
CCP boards operate in an N + 1
redundancy model. N is the number
of active boards ready to handle
traffic and one standby CCP board
is always available to take over the
traffic of failed board.
VTCU: TCU software
VDTC: DTC software
12 / 68 3BK 20982 AA TQZZA Ed.03
1 A9130 BSC Overall Description
Name Functional block mapped on board Existing function for BSC
TP GSM: Transmission Processing
board (in ATCA shelf)
Provides telecom transmission /
transport interfaces to the ATCA
platform.
Gigabit Ethernet switch
On-board local switch
(separates/aggregates nE1oE
traffic and IP control traffic).
NE1oE
Transports n x E1 frames in
Ethernet payloads, and is
assigned to a dedicated MAC
address.
Multiplexes/de-multiplexes up to
252 E1
Multiplexes/de-multiplexes up
to 252 E1 from/to the Gigabit
Ethernet Interface (NE1oE).
TDM switch
8 kbit/s synchronous switching
with a total bandwidth of 284 *
2 Mbits (252 external links + 32
internal links toward HDLC, SS7,
Q1 and R/W bits controllers).
Handles low layers of GSM
protocols
LAP-D over HDLC, ML-PPP over
HDLC, SS7, Q1 (= QMUX) and
R/W bits.
Two TPGSM boards are available.
They operate in active-standby mode
following 1+1 redundancy model.
HDLC termination
SS7 termination
NE1oE
Q1
Ring control
LIU boards (in LIU shelf) Interface for Radio Network links These links correspond to
the user plane interfaces.
MUX board (in LIU shelf)
Ethernet links on IP ports of SSW
switch
These links connect the
platform to external
IP equipment (OMC-R,
External Alarm Box, etc.).
3BK 20982 AA TQZZA Ed.03 13 / 68
1 A9130 BSC Overall Description
Name Functional block mapped on board Existing function for BSC
LIU Shelf Multiplex/demultiplex which cross
connects all E1 external links to/from
a NE multiplexed links (n E1 over
Ethernet) at TP and GP board.
It is equipped with 2 x Mux board and
n LIU boards.
E1 physical termination
NE1oE
ATCA Shelf See above.
Note: Compared to previous generation BSC, the ATCA PF does not provide X.21
interfaces. An X25 over IP link is used for CBC.
[attachment=31398]
1.1 A9130 BSC Overview
The A9130 BSC performs the following functions:
It provides GSM facilities for circuit switched mobile traffic and GPRS
facilities to allow the transfer of data in packets
It manages the radio resources and radio parameters
The BSC shares resources between circuit switched and packet switched
traffic, according to configuration parameters.
It shields the MSC and the MFS from the radio information, and performs
switching between the radio Traffic Channels (TCHs) and the terrestrial
channels, to the MSC and the MFS.
It manages transmission equipment by performing fault management
and correlation.
From a transmission point of view, the A9130 BSC also performs a
concentration function, therefore allowing more radio TCHs to be connected
to the A9130 BSC than terrestrial channels to the MSC.
The following figure provides an overview of the A9130 BSC in the BSS.
Ater Mux
Interface
BSC Site MSC Site
BSS
Abis
Interface
A Interface
BSS/OMC−R
Interface
BSS/CBC
Interface
Gb Interface Optional Link
Optional Link
BTS
BSC
BSC
Terminal
MFS
SGSN
OMC−R
TC MSC
CBC
BTS
TM
Terminal
SAGI
A−GPS server
BTS : Base Transceiver Station
CBC : Cell Broadcast Center
OMC-R : Operations and Maintenance Center-Radio
SGSN : Serving General Packet Radio Service Support Node
TM : Transmission
A-GPS : Assisted GPS
SAGI : SMLC A-GPS Interface
BSS : Base Station Subsystem
MSC : Mobile Switching Center
MFS : Multi Function Server
TC : Transcoder
Figure 1: The A9130 BSC in the BSS
10 / 68 3BK 20982 AA TQZZA Ed.03
1 A9130 BSC Overall Description
The A9130 BSC performs the following telecommunication, transmission
and O&M functions:
Provides signaling links to the MSC
Performs signaling control for the BTS and the Mobile Stations (MS)
Performs signaling control for the MFS links
Switches traffic between the MSC and the BTS
Routes traffic between the MFS and the BTS
Provides O&M facilities.
1.2 A9130 BSC Hardware Architecture
The following figure shows the BSC Hardware (HW) architecture on an ATCA
platform.
SSW
(duplicated)
Radio Network links
External Ethernet Links
LIU Shelf
(21 slots)
E1
CCPy
TPr
TP
Mux
LIU
1
LIU n
ATCA Shelf (14 slots)
CCP
OMCPw
OMCPr
r : Redundancy
W : Working
N and y : Network Element capacity
Figure 2: A9130 BSC HW Architecture
3BK 20982 AA TQZZA Ed.03 11 / 68
1 A9130 BSC Overall Description
The following table describes the A9130 BSC functional blocks and boards.
Name Functional block mapped on board Existing function for BSC
SSW: Gigabit Ethernet switch (in
ATCA shelf)
Allows exchanges between all the
elements of the platform and external
IP/Ethernet equipment:
Performs Gigabit Ethernet
switching at the shelf level
Performs powerful monitoring for
the user plane and control plane
(Gigabit Ethernet on front panel)
Ensures daisy chain with other
shelves via two 1 Gigabit Ethernet
ports (only one is used)
Ensures multicast function
Allows several external Ethernet
10/100/1000 Base T connections:
OMC-R, CBC, LCS, Debug
Implements 12 non blocking
1Gigabit Ethernet links via
backplane connections
...
The SSW board and all the
connections to the switch are
duplicated to overcome board or
connection failures.
OMC-R physical interface
CBC physical interface
Monitoring
NEM terminal connection
OMCP: O&M Control Processing
board (in ATCA shelf)
Is based on ATCA technology
equipped with a permanent storage
device. It manages the platform as
system manager, and manages O&M
applications.
OMCP boards operate in
active-standby mode following
the 1+1 redundancy model.
O&M logical interface to the
Operation and Maintenance
Center (OMC-R)
VCPR: S-CPR & O-CPR
software + TCH/RM
TSC software
CCP: Control Processing board (on
ATCA shelf)
Is based on ATCA technology used
for call control functions. Identical to
the OMCP board but without a hard
disk.
CCP boards operate in an N + 1
redundancy model. N is the number
of active boards ready to handle
traffic and one standby CCP board
is always available to take over the
traffic of failed board.
VTCU: TCU software
VDTC: DTC software
12 / 68 3BK 20982 AA TQZZA Ed.03
1 A9130 BSC Overall Description
Name Functional block mapped on board Existing function for BSC
TP GSM: Transmission Processing
board (in ATCA shelf)
Provides telecom transmission /
transport interfaces to the ATCA
platform.
Gigabit Ethernet switch
On-board local switch
(separates/aggregates nE1oE
traffic and IP control traffic).
NE1oE
Transports n x E1 frames in
Ethernet payloads, and is
assigned to a dedicated MAC
address.
Multiplexes/de-multiplexes up to
252 E1
Multiplexes/de-multiplexes up
to 252 E1 from/to the Gigabit
Ethernet Interface (NE1oE).
TDM switch
8 kbit/s synchronous switching
with a total bandwidth of 284 *
2 Mbits (252 external links + 32
internal links toward HDLC, SS7,
Q1 and R/W bits controllers).
Handles low layers of GSM
protocols
LAP-D over HDLC, ML-PPP over
HDLC, SS7, Q1 (= QMUX) and
R/W bits.
Two TPGSM boards are available.
They operate in active-standby mode
following 1+1 redundancy model.
HDLC termination
SS7 termination
NE1oE
Q1
Ring control
LIU boards (in LIU shelf) Interface for Radio Network links These links correspond to
the user plane interfaces.
MUX board (in LIU shelf)
Ethernet links on IP ports of SSW
switch
These links connect the
platform to external
IP equipment (OMC-R,
External Alarm Box, etc.).
3BK 20982 AA TQZZA Ed.03 13 / 68
1 A9130 BSC Overall Description
Name Functional block mapped on board Existing function for BSC
LIU Shelf Multiplex/demultiplex which cross
connects all E1 external links to/from
a NE multiplexed links (n E1 over
Ethernet) at TP and GP board.
It is equipped with 2 x Mux board and
n LIU boards.
E1 physical termination
NE1oE
ATCA Shelf See above.
Note: Compared to previous generation BSC, the ATCA PF does not provide X.21
interfaces. An X25 over IP link is used for CBC.