Unidirectional and bidirectional optimistic modes IP header compression for real-time video streaming

Communication over Internet Protocol (IP) networks, has become crucial component of day everyday activities. They are utilized over the Internet to support a wide range of services. The flexibility of this kind of transmission relies on the IP User Datagram Protocol (UDP), IP/UDP/Real-time Transport Protocol (RTP) and IP/Transmission Control Protocol (TCP). Unfortunately, the weight of encapsulated protocol headers affects the transmission efficiency. This research aims at improving a technique that reduce the packets header size by compression. Performance analysis of the enhanced efficient techniques in both unidirectional and bidirectional optimistic modes applied to real-time video streaming traffic for UDP/IP and HTTP/TCP flows over free error channel has been conducted. The finding shows that the header compression ratio in each case is good and better than the previous studies. The technique achieved a reduction up to 90% for RTP/UDP/IP, 89% for UDP /IP and 77.5 to 86.5 % for TCP/IP profile. This research contribution is restricted to compression gain and saving for 0x0000, 0x0001, 0x0002 and 0x0006 profiles in the unidirectional and bidirectional optimistic mode

Performance characterization of robust header compression (ROHC) over satellite based unidirectional link (UDL).

Tesis ini menilai penggunaan Pemampatan Teguh Kepala Paket (RObust Header Compression (ROHC)) untuk trafik Pengkapsulan Ringan Sehala (Unidirectional Lightweight Encapsulation (ULE)) dari segi prestasi rangkaian serta implementasi praktikal dan reka bentuk sistem pemampat and penyahmampat ROHC. This thesis evaluates RObust Header Compression (ROHC) for Unidirectional Lightweight Encapsulation (ULE) in terms of network performance as well as the practical implementation and the design of ROHC compressor and ROHC decompressor system

Aplicación de métodos de compresión de cabeceras TCP/IP como optimización de las comunicaciones móviles

El protocolo TCP (Transmission Control Protocol) está implementado para actuar en redes fija s, donde las incidencias en la comunicación pueden interpreta rse como problemas de con ges tión. En entornos móviles, en cambio, los problemas son debidos a una alta tasa de error en bit (BER); la utilización del protocolo TCP en este tipo de entornos afecta negativamente a la efici encia de la transmisión. En este artíc ulo se presenta una solución pa ra optimizar la comunicación TCP: la compresión de cabeceras; concretamente se expone la necesidad de un algoritmo especifico para comunicaciones móviles y se valora la propuesta de compresión de cabeceras de la lETF .Peer Reviewe

Aplicación de métodos de compresión de cabeceras TCP/IP como optimización de las comunicaciones móviles

El protocolo TCP (Transmission Control Protocol) está implementado para actuar en redes fija s, donde las incidencias en la comunicación pueden interpreta rse como problemas de con ges tión. En entornos móviles, en cambio, los problemas son debidos a una alta tasa de error en bit (BER); la utilización del protocolo TCP en este tipo de entornos afecta negativamente a la efici encia de la transmisión. En este artíc ulo se presenta una solución pa ra optimizar la comunicación TCP: la compresión de cabeceras; concretamente se expone la necesidad de un algoritmo especifico para comunicaciones móviles y se valora la propuesta de compresión de cabeceras de la lETF .Peer Reviewe

Robust Header Compression (ROHC) in Next-Generation Network Processors

Robust Header Compression (ROHC) provides for more efficient use of radio links for wireless communication in a packet switched network. Due to its potential advantages in the wireless access area andthe proliferation of network processors in access infrastructure, there exists a need to understand the resource requirements and architectural implications of implementing ROHC in this environment. We presentan analysis of the primary functional blocks of ROHC and extract the architectural implications on next-generation network processor design for wireless access. The discussion focuses on memory space andbandwidth dimensioning as well as processing resource budgets. We conclude with an examination of resource consumption and potential performance gains achievable by offloading computationally intensiveROHC functions to application specific hardware assists. We explore the design tradeoffs for hardware as-sists in the form of reconfigurable hardware, Application-Specific Instruction-set Processors (ASIPs), andApplication-Specific Integrated Circuits (ASICs)

Adaptive header compression techniques for mobile multimedia networks

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Prediction of RoHCv1 and RoHCv2 compressor utilities for VoIP

Modern cellular networks utilising the long–term evolution (LTE) and the coming 5G set of standards face an ever–increasing demand for low–latency mobile data from connected devices. Header compression is employed to minimise the overhead for IP–based cellular network traffic, thereby decreasing the overall bandwidth usage and, subsequently, transmission delays. Here, we employ machine learning approaches for the prediction of Robust Header Compression version 1’s and version 2’s compression utility for VoIP transmissions, which allows the compression to dynamically adapt to varying channel conditions. We evaluate various regression models employing r2 and mean square error scores next to complexity (number of coefficients) based on an RTP specific training data set and separately captured live VoIP audio calls. We find that the proposed weighted Ridge regression model explains about at least 50 % of the observed results and the accuracy score may be as high as 94 % for some of the VoIP transmissions