TCH block & Direct retry

[justdream]

Experts, what's the formual of calculating TCH Block rate with Directed retry

and firslty what's directed retry

Thanks a lot

[RF engineer]

Experts, what's the formual of calculating TCH Block rate with Directed retry

and firslty what's directed retry

Thanks a lot

directed retry is the feature used to relief congestion an it is kind of SDCCH to TCH handover and you have to chek you congestion formula if it takes incoming HO attempts.
BR
RF

[justdream]

I'm speaking about TCHblock_after Directed retry

what should be the formula ?

[RF engineer]

the formula is the same as i know in huawei i donot know foe other if you have manual of kpi u can see

[justdream]

the formula is the same as i know in huawei i donot know foe other if you have manual of kpi u can see

kindly share yours as in my manual I have TCHBlockRate but I don't see that ine after Directed Retry

[RF engineer]

kindly share yours as in my manual I have TCHBlockRate but I don't see that ine after Directed Retry

yes there is no counter say TCh blocking with direct retry
BR
RF

[taomomteling]

Experts, what's the formual of calculating TCH Block rate with Directed retry

and firslty what's directed retry

Thanks a lot

It's a feature to reduce the RTCH congestion by taking the SDCCH from the Serving Idle mode Cell and the TCH from the neighbour cell if the level is good (More than -85dBm) and more free TS available (4 free TS):

here a report about the Directed Retry from ALU:

http://www.4shared.com/file/22331620...DR_Report.html


Cheers,

[prophecia]

Experts, what's the formual of calculating TCH Block rate with Directed retry

and firslty what's directed retry

Thanks a lot

For NSN:

100* DECODE( nvl(traffic.tch_call_req,0),0,0,( nvl(traffic.tch_call_req,0)- nvl(traffic.tch_norm_seiz,0)) / nvl(traffic.tch_call_req,0))

BR