1. QoS Design for 3G Networks
Abdullah Al-Subhi
June 1, 2003

2. Outline Introduction. QoS in 3G Networks 3G QoS Techniques Conclusion.
UMTS.
CDMA2000
3G QoS Techniques
Traffic shaping and policing
Scheduling Algorithm
QoS for streaming Applications
Conclusion.

3. Introduction Why 3G? QoS Problems. What is Quality of Service?
Delay.
Resources limitations.
What is Quality of Service?
Availability of the service
Quality of information
Consistent delivery

4. UMTS QoS Architecture Control plane QoS User Plane QoS Service manager
Translation function
Admission/capability
Subscription Control
User Plane QoS
Mapping function
Classification function
Resource manager
Traffic conditioner

5. UMTS UMTS QoS Classes. Traffic class Conversational class Real Time
Streaming class Real Time
Interactive class Best Effort
Background class Best Effort
Fundamental characteristics
- Preserve time relation (variation) between information entities of the stream
- Conversational pattern (stringent and low delay )
- Request response pattern
-Preserve payload content
-Destination is not expecting the data within a certain time
Example of the application
  voice
  streaming video
web browsing
  telemetry, s

6. CDMA2000 Architecture Radio Bearer Service R-P bearer Service
Power Control
Radio Admission Control
Radio Resource Control (RRC)
Scheduling
R-P bearer Service
Call Admission Control
QoS Transport in R-P interface
External Bearer Service

7. CDMA2000 QoS implementation
CDMA2000 define two modes of QoS
Non-assured Mode QoS
Assured Mode QoS
Assured Mode QoS profile
Priority.
Data Rate
Data Lose Rate
Maximum Delay

8. Traffic shaping and policing
Definition
System Model

9. Token Bucket Algorithm
Definition.
Measures for packet arrives
Case 1: conformed at arrival
Case 2: non-conformed
Case 3: shaped to be conformed

10. Traffic Conditioning scheme in UMTS
Traffic Shaping at the UE

11. Traffic Conditioning scheme in UMTS
Traffic Policing at the RNC

12. Traffic Scheduling Algorithm
Definition
Scheduling Strategy
Prioritization
Capacity requirement
Availability check

13. DIFFSERV based QoS Architecture In 3G Network
Key components of the proposed Architecture
Multicast Model
PIM Active Join.
PIM Passive Join.
Mobile Proxy Agent
Intitlize the connection for mobile host in its cell by sending PIM active join tp RP and promots the mobile proxy agents in the neighboring cells to send PIM Passvie Join message forwards RP.
Implmemnts a mesaurment based scheme that that uses the information carried in probing packet header to determine the delay chariseistic for different services class.
Sends the periodic feeback to the source node reqarding the service class giving thee best delay-jitte performance.

14. DIFFSERV based QoS Architecture In 3G Network
Key components of the proposed Architecture
Streaming Proxy Server Agent
To smooth the incoming streaming traffic to remove delay-jitter accumulated as streaming traffic traverses the rest of the internet.
To perform the additional functionality of trans-coding .
To send probing packet mapped to different services class to the Mobile Proxy Agent. Probing packets carry the time-stamp, which helps the Mobile Proxy Agents to calculate the delay-jitter for
Seamless QoS using probing-based approach

15. QoS Issues in the Converged 3G and Wired Networks
The RCL Architecture
resource control agent (RCA)
admission control agent (ACA)
Reservation requests
Network Services and Traffic classes
premium constant bit rate (PCBR)
premium variable bit rate (PVBR)
premium multimedia (PMM)
premium mission critical (PMC)
best effort (BE).

16. Mapping QoS Traffic Classes

17. Control and User Plane Internetworking
The direct way implies that their mechanisms are aware of the details of each other, and the signaling protocol can be a proprietary one. This scenario ensures that the mapping among the traffic classes can be tuned to the best possible way.
The indirect way neither makes use of a proprietary signaling protocol nor requires the QoS management mechanisms to be aware of each other. This scenario is most appropriate in the case of independent service providers that do not have specific inter-domain partners

18. Conclusion UMTS QoS Architecture. QoS classes. QoS management CDMA2000
Non-assured Mode QoS
Assured Mode QoS
Traffic shaping and policing
Token Bucket Algorithm
Traffic Conditioning scheme in UMTS
Traffic Scheduling Algorithm for QoS in 3G Networks
Scheduling Strategy
Capacity requirement
Availability check
DIFFSERV based QoS Architecture In 3G Network.
Multicast Model
Mobile Proxy Agent
Streaming Proxy server agent
Seamless QoS using probing-based approach