Руководство По Обслуживанию для Cisco Cisco Packet Data Gateway (PDG)
New Feature Summary
Generally Available 06-30-2010
1-18
Overcharging Protection on Loss of Radio Coverage
This solution provides the ability to configure mobile carriers to maximize their network
solutions and balancing the requirements to accurately bill their customer.
solutions and balancing the requirements to accurately bill their customer.
Consider scenario where a mobile is streaming or downloading very large files from
external sources and the mobile goes out of radio coverage. If this download is happening
on Background/Interactive traffic class then the GGSN is unaware of such loss of
connectivity as SGSN does not perform the Update PDP Context procedure to set QoS to
0kbps (this is done when traffic class is either Streaming or Conversational only). The
GGSN continues to forward the downlink packets to SGSN. In the loss of radio coverage,
the SGSN will do paging request and find out that the mobile is not responding; SGSN will
then drops the packets. In such cases, the G-CDR will have increased counts but S-CDR
will not. This means that when operators charge the subscribers based on G-CDR the
subscribers may be overcharged. This feature is implemented to avoid the overcharging in
such cases.
external sources and the mobile goes out of radio coverage. If this download is happening
on Background/Interactive traffic class then the GGSN is unaware of such loss of
connectivity as SGSN does not perform the Update PDP Context procedure to set QoS to
0kbps (this is done when traffic class is either Streaming or Conversational only). The
GGSN continues to forward the downlink packets to SGSN. In the loss of radio coverage,
the SGSN will do paging request and find out that the mobile is not responding; SGSN will
then drops the packets. In such cases, the G-CDR will have increased counts but S-CDR
will not. This means that when operators charge the subscribers based on G-CDR the
subscribers may be overcharged. This feature is implemented to avoid the overcharging in
such cases.
This implementation is based on Starent-specific private extension to GTP messages and/or
any co-relation of G-CDRs and S-CDRs. It also does not modify any RANAP messages.
any co-relation of G-CDRs and S-CDRs. It also does not modify any RANAP messages.
This feature requires separate license to enable this for UMTS subscribers.
For more information of this feature, refer Subscriber Overcharging Protection chapter in
System Enhanced Feature Configuration Guide.
System Enhanced Feature Configuration Guide.