Cisco Cisco Tunnel Terminating Gateway (TTG) Documentation Roadmaps
New In This 8.0 Release
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OL-22937-01
Figure 4.
GRE Deployment Scenario
../../../GRAPHICS/Production/System_Enhanced_Feature/GRE_deployment_scenario_v1.wmf
For more information on functioning and configuration of this interface, refer GRE Protocol Interface chapter in System
Enhanced Feature Configuration Guide.
Enhanced Feature Configuration Guide.
License Keys
Requires separate license key.
Overcharging Protection on Loss of Radio Coverage
Benefits
This solution provides the ability to configure mobile carriers to maximize their network solutions and balancing the
requirements to accurately bill their customer.
requirements to accurately bill their customer.
Description
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.
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 Cisco-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.
and S-CDRs. It also does not modify any RANAP messages.
For more information of this feature, refer Subscriber Overcharging Protection chapter in System Enhanced Feature
Configuration Guide.
Configuration Guide.
License Keys
Requires separate license key.