1 Presentation_ID © 1999, Cisco Systems, Inc. QoS for CDMA Dana Blair Presentation_ID

2 © 1999, Cisco Systems, Inc. Wireless Access: A Single IP network IP Network Enterprise Networks Other IP Networks All-IP wireless access Circuit Networks Legacy Radio Access Wireless becomes just another access technology Mobility mgmt & radios resource mgmt are the key Other Access Networks (DSL, Cable, …)

3 Presentation_ID © 1999, Cisco Systems, Inc. Packet/VoIP over Cellular Architecture Services IP Network Radius DHCPDNS Edge Router SIP Proxy/ Media Gateway Controller PSTN-GW SS7 GW SS 7 PSTN SS7 Local Part of End-to-End Network(s) PDSN Min. BW w/ bounded delay, always on Mobile Network CDMA Access Network Mobile Router COPS

4 Presentation_ID © 1999, Cisco Systems, Inc. When is QoS Applicable ? BW < 28k bps Too slow. No noticeable differentation possible. All data is Best effort 28k bps < BW < 64k bps QoS possible. Strongly dependent on packet overhead, access network latency 64k bps < BW QoS is achievable Precise numbers may vary with technology and implementation

5 Presentation_ID © 1999, Cisco Systems, Inc. QoS over Slow BW links ? BW < 1.5 Mbps Fancy Queueing Link Fragementation and Interleaving Traffic shaping Traffic policing Traffic marking Admission control

6 Presentation_ID © 1999, Cisco Systems, Inc. Access Link Attributes Minimum BW Maximum delay Maximum bitrate Maximum bit error rate

7 Presentation_ID © 1999, Cisco Systems, Inc. Application Interface Resource Reservation Protocol RSVP combines multiple application layer requirements into link layer attributes for a single access link. RSVP enables admission control and billing. RSVP not specific to any link layer QoS. RSVP signaling initiates link layer QoS for a given access link. Use fancy queueing to schedule packets for transmission according to priority Use LFI to create upper delay bound for delay sensitive packets.

8 Presentation_ID © 1999, Cisco Systems, Inc. Benefits of IP QoS Single access link between Mobile and PDSN Simpler, more predictable access network behavior Common addmission control/billing for all access networks Handoff context minimized Supports QoS from mobile networked devices QoS behavior does not change as PDSN migrates closer to the BTS.

9 Presentation_ID © 1999, Cisco Systems, Inc. CDMA QoS Architecture PDSN Min. BW w/ bounded delay, always on Mobile Network CDMA Access Network Mobile Router BTS BSCPCF IP Network Radius COPS Terminal Equipment

10 Presentation_ID © 1999, Cisco Systems, Inc. QoS Flow PDSNMRBTSBSCPCFTERADIUSCOPS RSVP COPS CDMA L2 (modify) CDMA L2 RSVP CDMA L2 (create) Create Best Effort (BE) access link CDMA L2 Radius Modify BE access link to support QoS (max delay, minimum BW, max BER)

11 Presentation_ID © 1999, Cisco Systems, Inc. Questions ????????