User Manual

HLD-H/W WIBS
7
Cisco Systems, Inc. Confidential
4.1.3 Operation and Maintenance
4.1.3.1 Operation/Configuration Management
The WIBS should manage the data related to operation and configuration of its subsystems:
Ÿ Program/data downloading
Ÿ Radio resource management
Ÿ Configuration data management
Ÿ CDMA parameter management
4.1.3.2 Performance Management
The WIBS should collect and analyze data related to system performance, and send them to the
higher level entity for management (WIS, etc):
Ÿ Call-related parameters and statistics
Ÿ CDMA radio performance related parameters and statistics
4.1.3.3 Maintenance Management
The WIBS should perform detection, report, and recovery of abnormal operation:
Ÿ Fault detection and management
Ÿ Alarm monitoring and processing
Ÿ Periodic test for maintenance/diagnosis
Ÿ Status management
4.1.4 Configuration Features
Ÿ One WIBS supports one FA, one sector or one unidirectional cell.
Ÿ It can be operated with several kinds of RF front-end systems, such as in-building
repeaters, optical repeaters, distributed antennas, remote RF units, etc.
Ÿ A multi-sector cell site can be configured with multi-WIBSs where only soft handoff is
allowed between WIBSs, but softer handoff is not. For a conventional wireless network,
multiple WIBSs can be daisy-chained with one T1/E1 trunk to BSC (optional).
Ÿ Each channel element may be configured to one of following personalities:
◊ A pilot channel and a sync channel
◊ An access channel
◊ A paging channel
◊ A traffic channel
4.2 Performance Specifications
4.2.1 System Delay
The round-trip delay for voice packets through the whole paths should be less than 220 ms. A
conventional delay budget for the reverse link path and the forward is as follows:
Reverse Link Delay (ms) Forward Link Delay (ms)
Mobile Station 51 Mobile Station 18
Air Link 20 Air Link 20
Digital Unit 18 Digital Unit 2
Backhaul/Switching 6 IP-network 1
IP-network 1 Selector 2
Vocoder 3 Vocoder 49
Total 99 Total 92