GPRS and EGPRS Design and Optimization Training
GPRS and EGPRS Design and Optimization Training Course – Hands-on
Wireless operators have, in recent years, pushed to provide data services to subscribers to help broaden their revenue base as well as the subscribers’ mobile experience. Wireless and cellular/PCS technologies have traditionally been designed for circuit switched, voice oriented traffic. So with the introduction of data comes the challenge of designing a network which provides superior quality of service for both voice and data users across the same, contended air interface.
If you have a working knowledge of the air interface and operation of GPRS/EDGE systems, through prior experience or training, and are ready to focus on the advanced engineering issues, this GPRS and EGPRS Design and Optimization Training course can help you achieve an enhanced quality of experience for your data services subscribers.
GPRS and EGPRS Design and Optimization Training Course – Customize it
- We can customize this course, usually at little to no added cost, to the backgrounds and needs of such diverse groups as RF and transport engineers, researchers, equipment and application developer, business strategists, planners and policy makers, and personnel in IT, marketing/sales, and operations/support.
- If you are familiar with some aspects of this training course, we can omit or shorten their discussion.
- We can adjust the emphasis placed on the various topics or build the GPRS and EGPRS Design and Optimization Training around the mix of technologies of interest to you (including technologies other than those included in this outline).
- If your background is nontechnical, we can exclude the more technical topics, include the topics that may be of special interest to you (e.g., as a manager or policy-maker), and present the GPRS and EGPRS Design and Optimization Training course in manner understandable to lay audiences.
GPRS and EGPRS Design and Optimization Training Course – Audience/Target Group
The target audience for this training course:
- Engineers with prior exposure to GPRS/EDGE who wish to explore some of the advanced EGPRS engineering issues in depth.
GPRS and EGPRS Design and Optimization Training Course – Class Prerequisites
The knowledge and skills that a learner must have before attending this training course are:
- EDGE: Network Architecture, Operation, and Design Training
- GPRS: Network Architecture, Operation, and Design Training
- GSM: Network Architecture, Operation, and Design Training
You should have at least two years experience in the design and optimization of a GSM network along with some exposure to GPRS and EDGE. You should also be familiar with packet switching networks. While the standard presentation of this course assumes an Electrical Engineering background, the course can be adapted to other audiences.
GPRS and EGPRS Design and Optimization Training – Course Content
Understanding voice versus data
- Deterministic and random
- Data services and mix of data
- Voice versus data for system performance
- GPRS/EGPRS nodal and interface definitions
- GPRS/EGPRS nodal and interface definitions
GPRS bearer and signaling: Definitions, groups, and mapping of:
- RLC/MAC layer
- Random access requests and packet queuing notifications
GPRS and EGPRS Design and Optimization Training – GPRS message sequence
- Attached request
- PDP context activation
- Primary/secondary PDP context
- GPRS homing
- Location areas and updates
- Routing areas and updates
Systems Engineering Considerations
- Mapping bearer traffic to total traffic: Class will walk through several real world scenarios showing the impact of signaling overhead to various coding schemas
- Simple estimations of throughput with various time slot configurations: Class will be asked to predict and collectively model in simplistic terms throughput for various timeslot allocation with the effect of IP packet error rate to arrive at a simple, estimated throughput calculation
More on GPRS
- Coding schema
- Temporary block flow – TBF
- Channel assignment: Hopping versus non-hopping
- Throughput versus delay
- C/I ratio
- Automatic retransmission request
GPRS Problem Areas
- TBF usage
- Coding schema non-optimal
- Transmission time wasted
GPRS and EGPRS Design and Optimization Training – Core network
- Contention at SGSN
- Packet loss
- Processing delays at SGSN/GGSN
Problems, Causes, and Troubleshooting
- No IP address
- No PDP context
- No GPRS attach
- RAU failure
- No uplink data
- No downlink data
- No GPRS indicator
Create a test scenario to simulate parallel GSM and GPRS traffic load on a limited number of theoretical cells
- Determine the impact of GPRS load on GSM quality
- When and how to prioritize GPRS over GSM
- When and how to prioritize GSM over GPRS
Create a test scenario whereby GPRS traffic demand during the busy hour reaches 25% of total traffic
- What is the impact on the air interface? BLER, CS, FEC/BEC, SR-ARQ?
- What is happening at RA and LA?
- What about MIP? How does high versus low mobility provide additional impact?
- How should this be optimized and where does one begin?
- How do the eight available coding and modulation schemes available in EGPRS impact throughput? What are the underlying causes of EGPRS using higher versus lower coding schemes?