In our network we are using ZTE PS Core. The Attach License is 12400 and PDP license is 37200. Actual usage is 800 PDP context per day. The install BW is 50 Mbps and daily usage is between 10 Mbps to 20 Mbps. The issue we are facing is the GPRS/EDGE is very slow with arround 50 paquets lost when i’m doing ping from USB dongle. Is someone can help me to troubleshoot the issue ?
a slow PS throughput can be caused by many issues, and most of them are NOT due to core network capacity.
First of all, you need to ensure that you have enough capacity on:
Air (radio) interface : PDCH capacity
Abis interface : packet abis ts capacity
Ater PS interface : packet ater capacity
once you are cleared on capacity, you can have a look at radio quality (coding scheme, retransmission)
50 packets lost, over how many packets ?
how do you count lost packets -> based on EGPRS ACK/NACK messages ? In such case, keep in mind that EGPRS is based on a typical threshold of 10% of retransmissions. Packets cannot be “lost” (afaik), they are only being retransmitted, except in case of real time.