- This topic has 54 replies, 1 voice, and was last updated 13 years, 4 months ago by pix.
18th August 2007 at 08:41 #37729PramodGuest
what is rach phantom18th August 2007 at 13:20 #37730asoGuest
the phantom RACH means that BTS sensing that there is command for channel (RACH request) but in reality this is not the real command from mobile may be it noise that make BSC allocate AGCH many times but with out (Acknowldge message ) which make it the Abis load raise29th August 2007 at 10:32 #37731umerGuest
what is difference between bts and bsc in term of telecom and how it is works29th August 2007 at 19:23 #37732pixGuest
it depends on the vendor, but usually it works like this :
BTS does the measurement preprocessing and radiolink control (radio link failure detection and radio link recovery), and in alcatel, it collects all the radio measurement statistics (from measurement reports and results)
BSC does everything else (radio resource management, ho preparation and detection, candidate evaluation, etc.)30th August 2007 at 04:42 #37733asoGuest
if preproceessing is done by BTS I know it reduce load in Abis interface but in the same time is there any thing that effect is on contrary with abis load or not
thanks30th August 2007 at 07:29 #37734pixGuest
no actually, i was wrong yesterday, the channel preprocessing (= averaging windows for the measurements) is done by the BSC… sorry about that.
The BTS only assemble the measurement reports into measurement results and perform the radiolink supervision. And of coure, all the radio signal processing.14th September 2007 at 14:07 #37735KankambaGuest
Could someone help me out on the low CSSR at some sites due to message failure at NSS level.The call setup process would have passed the SD information handling level.how can one counter the message losses and how can one know which message is being lost,is it from the MS or from NSS.Please help14th September 2007 at 17:53 #37736pixGuest
you can have a pretty clear picture of the message counts by using qos counters. A QoS counter is counting a message.
Which system are you using ?
Regards,27th November 2007 at 12:39 #37737OMVEERGuest
MAIO & HSN can be unique for a sector with a condition of more a TRX?27th November 2007 at 15:51 #37738pixGuest
You should set 1 MAIO per TRX. It is certainly done automatically at hopping activation.
It is recommended to put different HSN for different cells, to avoid running identical sequences by to cells at the same time (the probability is quite low though, isn’t it ?)