Identify Feeder swap without visiting to site

[kentck86]

Hi,

Anyone can share how can we identify site was having feeder swap issue without the needs to visit the site or drive test checking? Any method can be done by analysis on the statistic?

thank you

[usama0795]

u can define neighbors 360 degrees of the cell and check the destination cell with maximum number of handover attempts; location of the destination cell can give u an idea or u can try locking some neighbor cell for 2 minuntes and check which cell takes the traffic......

[kentck86]

u can define neighbors 360 degrees of the cell and check the destination cell with maximum number of handover attempts; location of the destination cell can give u an idea or u can try locking some neighbor cell for 2 minuntes and check which cell takes the traffic......

Thanks for your input, however, for this way i guess much dependent on the neighbor definitions and the SHO traffic. What if the site is locating at Rural area which is having less than 300 SHO attempt per day?

[airian]

Thanks for your input, however, for this way i guess much dependent on the neighbor definitions and the SHO traffic. What if the site is locating at Rural area which is having less than 300 SHO attempt per day?

For Partial Swaps you can verify from calculating the difference b/w average main RX lev and Diversity RX lev. if the difference is high you can go for a HC to confirm the issue. This difference can also be high due to other reason like weak connectors/jumpers/vswr. But they are quite effective. following are the counters for calculating this difference in huawei BSC 6900..

• S4556:Average Main Level in the Customized MR
• S4557:Average Diversity Level in the Customized MR

[justdream]

For Partial Swaps you can verify from calculating the difference b/w average main RX lev and Diversity RX lev. if the difference is high you can go for a HC to confirm the issue. This difference can also be high due to other reason like weak connectors/jumpers/vswr. But they are quite effective. following are the counters for calculating this difference in huawei BSC 6900..

• S4556:Average Main Level in the Customized MR
• S4557:Average Diversity Level in the Customized MR

Dear, what's the threshold to know that Diff. is high?

[airian]

the results of these counters is in mW. you can convert it into dBm from following formula.

P_(dBm) = 10 · log₁₀( P_(mW) )-120

for normal TRX we havn't seen difference greater than 3 to 4 dBm. 1 or 2 spikes are normal.

[kentck86]

For Partial Swaps you can verify from calculating the difference b/w average main RX lev and Diversity RX lev. if the difference is high you can go for a HC to confirm the issue. This difference can also be high due to other reason like weak connectors/jumpers/vswr. But they are quite effective. following are the counters for calculating this difference in huawei BSC 6900..

• S4556:Average Main Level in the Customized MR
• S4557:Average Diversity Level in the Customized MR

Hi airian,

Thank you for your input. I will be trying on there. Moreover, do u have any idea for the case on 3G cell? Does the similar method applicable too?

thank you

[airian]

Sorry dear no idea about 3G, you can check and share your experience with it.

thanks and reputation if you like..

[patek1968]

See atteched file below how to check for possible main and diversity issue.=)

[kentck86]

See atteched file below how to check for possible main and diversity issue.=)

Thats a good sharing!!! Looking forward some expert is sharing on the method to be use in 3G as well.