Руководство По Устранению Ошибки для Cisco Cisco Packet Data Gateway (PDG)
Subscriber Overcharging Protection
▀ Introduction
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22983-01
Introduction
Mobile carriers typically are always looking for the solution for maximizing their network resource and, at the same
time, looking for the method to effectively use of their network resource. Some mobile carriers charge their subscribers
based on counts in x-CDR.
time, looking for the method to effectively use of their network resource. Some mobile carriers charge their subscribers
based on counts in x-CDR.
Consider scenario where a mobile is using streaming services or downloading very large files from external sources and
it goes out of coverage. If this download is happening on Background/Interactive traffic class then the GGSN is unaware
of such loss of connectivity as SGSN do not the perform Update PDP Context procedure to set QoS to 0kbps (this is
done when traffic class is either Streaming or Conversational only). The GGSN still keeps on sending the downlink
packets to SGSN, the SGSN does paging and finds out the mobile is not responding. SGSN will then drop the packets.
In such cases, the G-CDR will have increased counts but S-CDR will not have them.
it goes out of coverage. If this download is happening on Background/Interactive traffic class then the GGSN is unaware
of such loss of connectivity as SGSN do not the perform Update PDP Context procedure to set QoS to 0kbps (this is
done when traffic class is either Streaming or Conversational only). The GGSN still keeps on sending the downlink
packets to SGSN, the SGSN does paging and finds out the mobile is not responding. SGSN will then drop the packets.
In such cases, the G-CDR will have increased counts but S-CDR will not have them.
Some operators charge the subscribers based on G-CDR and overcharging can happen in the scenario given above. This
feature is provided to avoid the overcharging is such cases.
feature is provided to avoid the overcharging is such cases.
This feature uses private extension for Loss Of Radio Coverage (LORC) sent by SGSN in Update PDP Context message
to set QoS to 0 kbps, on detecting loss of radio coverage of UE. GGSN becomes aware of the LORC status by
recognizing the message (from SGSN) and discards the downlink packets if LORC status indicates loss of radio
coverage and also stops discarding downlink packets, if LORC status indicates gain of radio coverage of UE.
to set QoS to 0 kbps, on detecting loss of radio coverage of UE. GGSN becomes aware of the LORC status by
recognizing the message (from SGSN) and discards the downlink packets if LORC status indicates loss of radio
coverage and also stops discarding downlink packets, if LORC status indicates gain of radio coverage of UE.