GSM/EDGE Standards Evolution (up to Rel' 4)

Hakaste, Markus; Nikula, E.; Hamiti, S.

doi:10.1002/0470866969.ch1

Cited by 6 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. During the first transmission the data (1) is encoded by a rate 1/3 convolutional encoder [1] [3] and punctured using puncture pattern 1 of MCS x (2). Since only one transmission was made the combination stage is skipped (3).…”

Section: Incremental Redundancymentioning

confidence: 99%

“…3). LT codes can be used to replace (1) (2) [21], e.g. a message can be encoded using a systematic LT code [9] (2) and if the frame at the decoder (4) is invalid the transmitter retransmits the message using a different non-systematic LT structure (2).…”

Section: Incremental Redundancymentioning

confidence: 99%

“…Enhanced Data Rates for GSM Evolution (EDGE) [1], i.e. 2.75G, is a digital mobile phone technology that allows increased data transmission rates and improved data transmission reliability when compared to older technologies like General Packet Radio Service (GPRS) available to users of Global System for Mobile communications (GSM).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the use of 8PSK modulation the receiver is now more complex and employs sophisticated equalization techniques. The actual maximum bit rate of EDGE is achieved by MCS9 and equals 59.2 kbit/s, the difference is due to EDGE implementation issues like headers and parity bits [1]. Since only MCS5 to 9 use 8PSK modulation these schemes were used for simulation purposes (only these schemes achieve a higher throughput when compared to GPRS).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Systematic Luby Transform codes as incremental redundancy scheme

et al. 2011

View full text Add to dashboard Cite

Systematic Luby Transform (fountain) codes are investigated as a possible incremental redundancy scheme for EDGE. The convolutional incremental redundancy scheme currently used by EDGE is replaced by the fountain approach. The results of the simulations performed for each incremental redundancy scheme show that the fountain approach outperforms the convolutional approach on the second retransmission when implemented on the EDGE platform. The results also indicate that if the packet sizes used by a specific platform is large enough the fountain approach will always outperform the convolutional approach.

show abstract

Section: Incremental Redundancymentioning

confidence: 99%

Section: Incremental Redundancymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Systematic Luby Transform codes as incremental redundancy scheme

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Enhanced GPRS (EGPRS) [10] is an extension of GPRS that uses the EDGE (Enhance Data Rates for Global Evolution) technology. This technology ensures higher data rates (in theory 3 times higher than in GPRS) by using the 8 PSK (eight Phase Shift Keying) modulation.…”

Section: Gprs/egprsmentioning

confidence: 99%

OMNeT++ Models for Resource Allocation in Wireless Networks

Todinca

Pescaru

Viţălariu

2008

Proceedings of the First International ICST Conference on Simulation Tools and Techniques for Communications Networks and Syste

View full text Add to dashboard Cite

Nowadays Wireless Networks have an important impact in many activity domains. Due to the hardware and bandwidth limitations of these networks, resource allocation represents an important issue, being in the same time a very active research area. Considering the complexity of the wireless networks, analytical solutions are hard to be found. Hence, simulation becomes the most used methodology and OMNeT++ proves to be a very useful tool for investigation. This paper presents our work concerning the performance of different resource allocation techniques for EGPRS and Wireless Sensor Networks.

show abstract

General Packet Radio Service

Levesque¹

2007

Handbook of Computer Networks

View full text Add to dashboard Cite

Impact of outages on GPRS service availabilityGeneral Packet Radio Service has been developed to enhance the GSM telecommunication system with the addition of packet-switched capabilities, as the key enabler for the integration between wireless transmission and Internet data services. Analyses of the GPRS expected behavior have been performed essentially focusing on measures like throughput and delay for the end-to-end packet transmission, and packet loss probability. Classical availability is defined as the property of "readiness of usage", measured as the delivery of correct service with respect to alternation of correct-incorrect service. However, in the case of GPRS, whose services are continuously required by users, the mere estimation of availability in terms of intervals of times the system is operative with respect to those of outage is not a satisfactory measure to know. During outages, there is an accumulation of users waiting for service. As soon as the GPRS becomes available anew, the high number of requests overloads the slotted Aloha mechanism used to get access to system resources. This collision generates a negative effect that lengthens the period of service provision interruption. The system requires some time to absorb the congestion before getting back to the state in which the average level of service quality is provided to the users. A study on the impact of outages on GPRS service availability is being conducted in the framework of the collaboration between the Modeling and Simulation Team at Motorola Technology Center Italy and the Dependable Computing Group at CNUCE, an institute of the Italian National Research Council based in Pisa. The investigation being performed explores the behavior of GPRS through a stochastic modeling approach based on Stochastic Activity Network models [1]. This work contributes to the analysis of GPRS in two ways:1. The behavior of the GPRS in presence of outages is modeled and analyzed [2], in order to estimate the degradation of the service quality as perceived by users and to understand the relevant phenomena. The curves in Figure 1 plot the time required for the system to go back to its steady-state conditions for various outage durations. As it can be observed, the congestion after an outage may lead to an additional service unavailability whose length is of the same order of magnitude as that of the outage itself. 2. An availability model of GPRS infrastructure is built, which allows deriving the distribution of the unavailability periods during system lifetime. Since the seriousness of the post-outage degradation is sensitive to the outage duration distribution, results drawn from the availability model are used to provide accurate outage characterization to be included in the model at point 1) above.

show abstract

GSM/EDGE Standards Evolution (up to Rel' 4)

Cited by 6 publications

References 2 publications

Systematic Luby Transform codes as incremental redundancy scheme

Systematic Luby Transform codes as incremental redundancy scheme

OMNeT++ Models for Resource Allocation in Wireless Networks

General Packet Radio Service

Contact Info

Product

Resources

About