This Course is available in the following format:
GPRS and EGPRS Design and Optimization Training Course Hands-on
If you have a working knowledge of the air interface and operation of GPRS | EGPRS 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
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 are familiar with some aspects of this GPRS and EGPRS Design and Optimization Training course, we can omit or shorten their discussion.
• We can adjust the emphasis placed on the various topics or build the course 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 course in manner understandable to lay audiences.
GPRS and EGPRS Design and Optimization Training – Course Syllabus:
Review of and what is GPRS/EGPRS?
◾Understanding voice versus data
◾Deterministic and randomness
◾Data services and mix of data
◾Voice versus data for system performance
◾GPRS/EGPRS nodal and interface definitions
◾GPRS Bearer & Signalling – definitions, groups & mapping of:
◾Random access requests & packet queuing notifications
◾GPRS Message Sequence
◾PDP Context Activation
◾Primary/Secondary PDP Context
◾Location Areas & updates
◾Routing Areas & updates
System 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
Additional Details of GPRS
◾Temporary Block Flow – TBF
◾Channel Assignment – Hopping versus non-hopping
◾Throughput versus delay
◾Automatic Retransmission Request
GPRS Problem Areas
◾Coding schema non-optimal
◾Transmission time wasted
◾Contention at SGSN
◾Processing delays at SGSN/GGSN
Troubleshooting & Causes
◾No IP Address
◾No PDP Context
◾No GPRS Attach
◾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 8 available coding and modulation schemes available in EGPRS impact throughput? What are the underlying causes of EGPRS using higher versus lower coding schemes?