10.1.1 BSC6910 Board Redundancy
BSC6910 board redundancy has two types: board backup and resource pool.
NOTE
The BSC6910 interface boards have an effective mechanism for fault detection and automatic recovery.
When the BSC6910 detects that a certain proportion of resources of an interface board are unavailable for a specified period of time, the BSC6910 resets the interface board. If the faulty board is the active one in a pair of active and standby boards, the BSC6910 switches over the active and standby boards. For example, l The BSC6910 resets an Iub interface board if a certain proportion of cells under the Iub interface board
are unavailable for a specified period of time because of a failure in Iub transmission links.
l The BSC6910 resets an Iub interface board under the following conditions: The RRC connection setup success rate in a cell is lower than a predefined threshold because of a failure in Iub transmission links, the proportion of such cells under the Iub interface board reaches a predefined cell threshold, the proportion of NodeBs having such cells reaches a predefined NodeB threshold, and this situation persists for a specified period of time.
l If the BSC6910 detects any transmission fault, the BSC6910 reports an alarm instead of resetting the interface board.
l Backup of AOUc/UOIc/POUc boards
When two AOUc/UOIc/POUc boards are installed in adjacent active and standby slots in a BSC6910 subrack, the two boards can be configured to work in board backup or optical port backup mode.
l Resource pool of DPUf boards
The DPUf boards of the BSC6910 and the GUPTC subsystem of each DPUf work in resource pool mode.
l Backup of EXOUa/FG2c/GOUc/FG2d/GOUd boards
When two EXOUa/FG2c/GOUc/FG2d/GOUd boards are installed in adjacent active and standby slots in a BSC6910 subrack, the two boards can be configured to work in board backup mode.
l Resource pool of ENIUa boards
The ENIUa boards of the BSC6910 work in resource pool mode.
l Backup of SCUb boards
The BSC6910 is configured with two SCUb boards in adjacent active and standby slots in each subrack. The two boards work in board backup mode.
l Backup of GCUa/GCUb/GCGa/GCGb boards
The BSC6910 is configured with two GCUa/GCUb/GCGa/GCGb boards in adjacent active and standby slots in the MPS. The two boards work in board backup mode.
l Backup of EOMUa boards
When two EOMUa boards are installed in adjacent active and standby slots in the BSC6910 MPS, the two boards work in board backup mode.
l Independent mode of the ESAUa Board
The BSC6910 is configured with one ESAUa board, which works in independent mode.
Base Station Controller Equipment Reliability Feature
Parameter Description 10 Hardware Reliability
l Resource pool and board backup of EGPUa/EXPUa boards
The EGPUa board provides the following logical functions: RMP for resource management, UCUP for UMTS service processing, and GCUP for GSM service processing. The EXPUa board provides the function of GSM service processing. The redundancy mode of the EGPUa/EXPUa board varies depending on its logical type.
10.1.2 BSC6900 Board Redundancy
BSC6900 board redundancy has two types: board backup and resource pool.
NOTE
The BSC6900 interface boards have an effective mechanism for fault detection and automatic recovery.
When the BSC6900 detects that a certain proportion of resources of an interface board are unavailable for a specified period of time, the BSC6900 resets the interface board. If the faulty board is the active one in a pair of active and standby boards, the BSC6900 switches over the active and standby boards. For example, l The BSC6900 resets an Iub interface board if a certain proportion of cells under the Iub interface board
are unavailable for a specified period of time because of a failure in Iub transmission links.
l The BSC6900 resets an Iub interface board under the following conditions: The RRC connection setup success rate in a cell is lower than a predefined threshold because of a failure in Iub transmission links, the proportion of such cells under the Iub interface board reaches a predefined cell threshold, the proportion of NodeBs having such cells reaches a predefined NodeB threshold, and this situation persists for a specified period of time.
l If the BSC6900 detects any transmission fault, the BSC6900 reports an alarm instead of resetting the interface board.
l Backup of AEUa boards
When two AEUa boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode.
l Backup of EIUa/EIUb boards
When two EIUa/EIUb boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode.
l Resource pool of NIUa boards
The NIUa boards of the BSC6900 work in resource pool mode.
l Backup of OIUa/OIUb boards
When two OIUa/OIUb boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode.
l Backup of PEUa/PEUc boards
When two PEUa/PEUc boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode.
l Backup of SCUa/SCUb boards
The BSC6900 is configured with two SCUa/SCUb boards in adjacent active and standby slots in each subrack. The two boards work in board backup mode.
l Backup of TNUa/TNUb boards
The BSC6900 is configured with two TNUa/TNUb boards in adjacent active and standby slots in some subracks. The two boards work in board backup mode.
l Backup of AOUa/AOUc boards
When two AOUa/AOUc boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode or optical port backup mode.
l Backup of FG2a/FG2c/FG2d boards
When two FG2a/FG2c/FG2d boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in either of the following modes: board backup with no port backup and board backup with port backup.
l Backup of GCUa/GCUb/GCGa/GCGb boards
The BSC6900 is configured with two GCUa/GCUb/GCGa/GCGb boards in adjacent active and standby slots in the MPS. The two boards work in board backup mode.
l Backup of GOUa/GOUc/GOUd boards
When two GOUa/GOUc/GOUd boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in either of the following modes: board backup with no port backup and board backup with port backup.
l Backup of OMUa/OMUb/OMUc boards
When two OMUa/OMUb/OMUc boards are installed in adjacent active and standby slots in the BSC6900 MPS, the two boards work in board backup mode.
l Backup of POUa/POUc boards
When two POUa/POUc boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode or optical port backup mode.
l Independent mode of the SAUa/SAUc board
The BSC6900 is configured with one SAUa/SAUc board, which works in independent mode.
l Backup of UOIa/UOIc boards
When two UOIa/UOIc boards are configured in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode or optical port backup mode.
l Backup of XPUa/XPUb/SPUa/SPUb boards
When two XPUa/XPUb/SPUa/SPUb boards are installed in adjacent active and standby slots in a BSC6900 subrack, the two boards can be configured to work in board backup mode.
l Resource pool of DPUa/DPUb/DPUc/DPUd/DPUe/DPUf/DPUg boards
The DPUa/DPUb/DPUc/DPUd/DPUe/DPUf/DPUg boards of the BSC6900 and the digital signal processors (DSPs) in all the DPUa/DPUb/DPUc/DPUd/DPUe/DPUf/DPUg boards work in resource pool mode.
Base Station Controller Equipment Reliability Feature
Parameter Description 10 Hardware Reliability
11 Related Features
Prerequisite Features
None
Mutually Exclusive Features
None
Impacted Features
None
12 Network Impact
System Capacity
None
Network Performance
None
Base Station Controller Equipment Reliability Feature
Parameter Description 12 Network Impact