Implementation and ESL Verification of New Earliest-Deadline-First Scheduler for Video Streaming over Wireless Networks

We propose the Most-Emergent-First (MEF) scheduler which regard the emergency score obtained from the delay status and traffic specification (TSPEC) to determine transmit sequence of flows. Via cross-layer signaling, transmission opportunities (TXOPs) of flows are dynamically adjusted to meet the TSPEC while the bandwidth utilization in a IEEE 802.11e environment is maintained. The proposed prioritized and parameterized QoS mechanism at the MAC layer is a four-rule policy base where parameters such as TSPEC and TXOPs dynamically obtained and determined respectively according to instant network status. The experiment shows that optimal PSNR, fairness among flows of the video class, fairness between higher and lower priority classes and QoS differentiation are achieved even when the total bandwidth capacity is limited and the wireless network is with unpredictable traffic bursting and dynamics.

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“…In [4], we proposed policy rule-based EDF scheduling. It measure emergency using the emergency score.…”

Section: The Most-emergent-first Schedulingmentioning

confidence: 99%

“…In our previous work [4], a revision of EDF algorithm with emergency score for evaluating the true emergency of traffic streams was proposed and implemented in FPGA prototype. We call the new EDF algorithm the Most-Emergent-First (MEF).…”

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confidence: 99%

Cross-Layer Most-Emergent-First Scheduler for Wireless Local Area Networks

Chen

Chang

2012

2012 Eighth International Conference on Intelligent Information Hiding and Multimedia Signal Processing

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“…In this section, we implement three MAC layer QoS controller designs in [12], [13], and [14] into SIPs and then perform the proposed verifications based on the cross-layer mechanisms proposed in these literatures for comprehension of how data bus width and clock rate affect video streaming over Hybrid Coordination Function (HCF) Controlled Channel Access (HCCA), contention-based Enhanced Distributed Channel Access (EDCA) and WiMAX OFDMA TDD scheduler-based wireless networks respectively. The environment and NS-2 simulation parameter settings remain the same as their respective original settings.…”

Section: Verification Of Qos Sips For Wireless Networkmentioning

confidence: 99%

“…The first is the modified Earliest-Deadline-First (EDF) scheduling [12] which is a representative of contention-free scheduling for Time-Division Multiplexing (TDM) communications. The modified EDF features four policy rules that assign higher score of emergency to a flow if the flow has been waited time intervals closer to the deadline.…”

Section: Verification Of Modified Edf Scheduling In Hccamentioning

confidence: 99%

Architecture exploration of QoS control Silicon Intellectual Properties for Cross-Layer Designs in wireless networks

Chen

Chuo

Cheng

et al. 2011

2011 IEEE International Conference on Multimedia and Expo

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We propose an architecture exploration scheme for QoS control Silicon Intellectual Properties (SIPs). The scheme integrates network simulator (NS-2), embedded Linux operating system, Linux driver, Electronic Design Automation (EDA) tools, extended on-chip bus, and real Field Programmable Gate Array (FPGA) hardware for comprehension of how data bus width and clock rate affect QoS performance in wireless networks. Software and hardware co-design flow and programming paradigm for evolving the FPGA prototype toward a platform-based reusable SIP with driver and cross-layer interface are also depicted. Three QoS control experiments in video streaming over HCCA, EDCA, and WiMAX wireless technologies demonstrate the proposed exploration scheme effectively helps engineers comprehend impacts of architectural design parameters on networking performances in wireless multimedia communications.Index Terms-architecture exploration, silicon intellectual property, QoS, algorithm and architecture co-design

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Selectivity function scheduler for IEEE 802.11e HCCA access mode

Ali

Bourawy

Hassanein

2011

Wireless Communications

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SUMMARY In this paper, we present a scheduling algorithm that enhances the performance of the standard IEEE 802.11e scheduler for the Hybrid Coordination Function Controlled Channel Access mode. The main contribution in designing the proposed scheduler is the ability to accommodate multiple streams with different levels of Quality of Service requirements concurrently running on the same station. This is achieved by dynamically calculating the Transmission Opportunities of each active traffic stream (TS) and the appropriate Service Interval of each active station. The proposed algorithm optimizes the utilization of the scarce bandwidth resources by only polling active stations. The algorithm incorporates a selectivity function to assign polling priorities to the active streams only based on their diverse requirements and their link‐attainable transmission rates. The performance of the proposed Selectivity Function Scheduler (SFS) scheme is evaluated against the standard scheduler. Simulation results show that the SFS outperforms the standard scheduler in terms of enhancing streams' throughput, reducing packet dropping ratio and maintaining high fairness amongst the admitted TS. Copyright © 2011 John Wiley & Sons, Ltd.

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Implementation and ESL Verification of New Earliest-Deadline-First Scheduler for Video Streaming over Wireless Networks

Cited by 3 publications

References 11 publications

Cross-Layer Most-Emergent-First Scheduler for Wireless Local Area Networks

Cross-Layer Most-Emergent-First Scheduler for Wireless Local Area Networks

Architecture exploration of QoS control Silicon Intellectual Properties for Cross-Layer Designs in wireless networks

Selectivity function scheduler for IEEE 802.11e HCCA access mode

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