1. LQS Project QoS Client Protocol Jochen Eisl ICM N PG SP RC 27-08-2002

2. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 2 Presentation Overview CASP QoS Feature Overview Reservation Range Partial Reservation Advance Reservation Resource Query Reserve / Commit Mechanism Local Information Mobility Showcase

3. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 3 Reservation Range Specification of upper and lower resource threshold Nodes reserve highest amount below maximum Nodes with higher reservation are updated on return path  Message reduction  Support for adaptive application

4. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 4 Partial Reservation (PR) Reservation initially may fail at some nodes Application may accept „backholes“ for some time PR objects includes Counters to record number of failed hops (C1) Counters with acceptable number of failed hops (C2) Retry flag Reservation fails at any node, if C1 > C2 Application of local algorithm if retry flag is set  Enhanced resource utilization  Higher chance of service delivery  New accounting & charging schemes

5. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 5 Advance Reservation Resource reservation at any time in future Time object includes start / end time in NTP format  Potential feature for conference applications  Periodic reservation seems attractive but needs further investigation

6. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 6 Resource Query Query resources before requesting them Return of response message with status object Status object includes for each hop Node idendity Success of (potential) reservation Failure reasons Reservation idendity (version)  Resources don‘t have to be allocated  3rd party query to coordinate resource allocation among different parties

7. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 7 Reserve / Commit Mechanism Reserve assigns resources – „soft state reservation“ Commit allocates resources for exclusive use – „hard state reservation“ Receiver / Sender oriented reservation Priority object for reservation priority  Fast reservation of resources (first message)  RESV message (RSVP)  Efficient resource usage  Applicable for mobility handover

8. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 8 Local Information CASP- QoS carries local information Information insertion / deletion by „any“ node Examples for local information Authorization token DSCP Aggregation Accounting & charging Syntax and path information decoupled from the protocol  Minimize transport of information overhead  Authorization of sink / source nodes

9. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 9 Mobility Showcase zhtzt nCoA oCoA Crossover Router Old Access Router New Access Router CN CR determined by next hop discovery

10. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 10 Mobility Showcase zhtzt nCoA oCoA Crossover Router Old Access Router New Access Router CN CASP-ADD

11. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 11 Mobility Showcase zhtzt nCoA oCoA Crossover Router Old Access Router New Access Router CN CASP/QOS-REL CASP-DEL

12. © Siemens, 2001ICM N templ-example.ppt 12/07/2001Page 12 Mobility Showcase zhtzt nCoA oCoA Crossover Router Old Access Router New Access Router CN CASP/QOS-COMMIT