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Technical Training on RF Optimization
Optimization is to
Keep track of network
Improve quality of network
To provide best network quality using any available spectrum analyzer
Accessibility, Retainability, Mobility
The Radio Network Optimization (RNO) is to reasonably adjust the communication network planning and design as per certain criteria so as to enable the network operation more reliable and economical, improve the network service quality and resource utilization, which is of great importance to network carriers.
2G Optimization
1. Coverage Optimization
2. Call drop Optimization
3. Neighbor Optimization
4. Handover Optimization
Coverage
2G RX level
Good: Rx Lev > -85dbm
Radio Ok= -85dbm<Rx Lev<= -95dbm
Poor: Rx Lev < -95dbm
Coverage
Causes Poor Coverage
1. Poor coverage due to bad Rx Lev- Receive signal level < -95dbm
2. Poor Coverage due to Missing neighbors & handover failure 3. Faulty hardware. 4. Interference
1. Coverage Optimization Ways to improve coverage in a network if any of the following issue occurs
I. Poor coverage due to bad Rx Lev
Ways to improve poor coverage
Antenna tilt Antenna azimuth Antenna height TMA amplifier Antenna type Antenna location New site
II. Poor Coverage due to Missing neighbors Ways to resolve missing neighbors in other to improve coverage
Check neighbor list from BSS engineer Add missing neighbor cells.
III. Check hardware alarm, Loss of attenuation check – Feeders , connectors & Jumper
2. Call Drop
Causes of call drop
1. Poor coverage – Low signal strength
2. Handover failure
3. Missing Neighbors
4. Interference
5. Hardware Faulty
6. Signalling
2. Optimization of Call Drop
I. Call drop due to Poor coverage- Low signal strength
Ways to Optimize
Antenna tilt Antenna azimuth Antenna location Antenna height Antenna type Site location New site
II Call drop due to Handover failure
Ways to optimize handover failure
Unavailable time slots because of high traffic – Increase time slot Congestion – Increase Capacity Low signal strength and bad quality Check handover margin Hardware problem like TRX or time slot problem
II Call drop due to Missing neighbor
Ways to optimize handover problem
Check neighbor list from BSS engineer Add missing neighbor cells Remove unnecessary neighbor cells
III Call drop due to Interference.
Ways to Optimize
Avoid Co-channel- Same Frequency Avoid Adjust Channel – Adjacent frequency Check external interference
IV Check hardware Alarm, Radio failure and BTS failure
V. Signaling - Run a Trace in the affected area
3. Neighbor Optimization
I. Neighbor relation should be well define to avoid call drop
II. Check neighbor list from BSS engineer
III. Add missing neighbor cells IV Remove unnecessary neighbor cells.
4. Handover Optimization -
Check Handover margin