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Call flows for resource allocations of Mmed calls

Call flows for resource allocations of Mmed calls. Ericsson September 6, 2000 Vancouver. Call from PSTN to Mmed user in Home Network. User B. RAN. AG. C-BWM. SCM. MGCF. MGW. IAM. SIP INVITE. SIP INVITE. 100. 100. Resource reservation. QoS Request. QoS decision. Resource request.

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Call flows for resource allocations of Mmed calls

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  1. Call flows for resource allocations of Mmed calls Ericsson September 6, 2000 Vancouver

  2. Call from PSTN to Mmed user in Home Network User B RAN AG C-BWM SCM MGCF MGW IAM SIP INVITE SIP INVITE 100 100 Resource reservation QoS Request QoS decision Resource request Resource result Resource reservation result 180 180 ACM 200 200 One way voice/Ringing tone Ack ANM Ack Both way RTP Both way voice

  3. Call from Mmed user to PSTN User A RAN AG C-BWM SCM MGCF MGW SIP INVITE SIP INVITE IAM 100 100 ACM 183 183 Resource reservation QoS Request QoS decision Resource request Resource result Resource reservation result Both way RTP One way voice ANM 200 200 Ack Ack Both way RTP Both way voice

  4. Call from Mmed user to Mmed user served by the same RAN User A RAN AG C-BWM SCM User B SIP INVITE 100 Resource reservation QoS Request QoS decision Resource request Resource result Resource reservation result 183 183 200 200 Resource reservation QoS Request QoS decision Resource request Resource result Resource reservation result Ack Ack Both way RTP

  5. Call from PSTN to Mmed user roaming in a visited network visited home User B RAN AG C-BWM SCM MGCF MGW IAM SIP INVITE SIP INVITE 100 100 Resource reservation QoS Request QoS decision Resource request Resource result Resource reservation result 180 180 ACM 200 200 One way voice/Ringing tone Ack ANM Ack Both way RTP Both way voice

  6. Conclusion • The above examples show a model whereby resources could be requested by the MS instead of MGCF or SCM requesting the resources on the user’s behalf. This is a model allowing more intelligence to be pushed to the end-terminals. • The call flows focus on the call control and resource requests procedure. Authorization of resources is not shown in order to not crowd the call flows.

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