scholarly journals Proportional interactive buffer management and scheduling

2021 ◽  
Author(s):  
Yifan Peng
Keyword(s):  
Packet Loss ◽  
Buffer Management ◽  
Safety Margin ◽  
Differentiated Services ◽  
Feedback Mechanism ◽  
Queuing Systems ◽  
End To End ◽  
Time Critical ◽  
Packet Drop ◽  
Qos Metrics

The proportional differentiated services model has been gaining attention in recent years. Many effective algorithms have been proposed to provide delay and packet loss differentiated services to different traffic classes according to their pre-defined constraints. In this article, we propose three novel QoS mechanisms to enhance the control of class-based QoS. First, we introduce a Scheduling to Dropping feedback mechanism, which is called SDF model. The main usage of the SDF is to provide dynamic trade-off between different basic QoS metrics. SDF provide differentiated services based on both proportionality constraints and absolute constraints. We also introduces an additional feature called Adaptive Safety margin (ASM). Usually, The Earlier Due Date (EDD) [7] employs a fixed safety margin to pre-assign more bandwith for time-critical traffics. ASM can adaptively changes this margin according to the queuing length or packet head-drop rate of the time-critical traffics when the congestion happened. By employing ASM with SDF model, it is found that the total packet drop can greatly be reduced. Finally, we introduce two sorting methods, called one-sort and complete-sort scheme, for the queuing systems in the end-to-end QoS environment. By sorting the order of the packets in the queue based on their deadlines, we can reduce the probability of end-to-end deadline violation.

scholarly journals Proportional interactive buffer management and scheduling

2021 ◽  
Author(s):  
Yifan Peng
Keyword(s):  
Packet Loss ◽  
Buffer Management ◽  
Safety Margin ◽  
Differentiated Services ◽  
Feedback Mechanism ◽  
Queuing Systems ◽  
End To End ◽  
Time Critical ◽  
Packet Drop ◽  
Qos Metrics

The proportional differentiated services model has been gaining attention in recent years. Many effective algorithms have been proposed to provide delay and packet loss differentiated services to different traffic classes according to their pre-defined constraints. In this article, we propose three novel QoS mechanisms to enhance the control of class-based QoS. First, we introduce a Scheduling to Dropping feedback mechanism, which is called SDF model. The main usage of the SDF is to provide dynamic trade-off between different basic QoS metrics. SDF provide differentiated services based on both proportionality constraints and absolute constraints. We also introduces an additional feature called Adaptive Safety margin (ASM). Usually, The Earlier Due Date (EDD) [7] employs a fixed safety margin to pre-assign more bandwith for time-critical traffics. ASM can adaptively changes this margin according to the queuing length or packet head-drop rate of the time-critical traffics when the congestion happened. By employing ASM with SDF model, it is found that the total packet drop can greatly be reduced. Finally, we introduce two sorting methods, called one-sort and complete-sort scheme, for the queuing systems in the end-to-end QoS environment. By sorting the order of the packets in the queue based on their deadlines, we can reduce the probability of end-to-end deadline violation.

Qos Metrics for end to end Stable Routing in MANET

2018 ◽  
Vol 6 (12) ◽  
pp. 57-61
Author(s):  
Vijaya Bhaskar Ch ◽  
D.S.R. Murthy
Keyword(s):  
End To End ◽  
Stable Routing ◽  
Qos Metrics

Design and Implementation of Buffer Control in EoS System

2013 ◽  
Vol 411-414 ◽  
pp. 684-687
Author(s):  
Wei He ◽  
Yan Gan Zhang ◽  
Xue Guang Yuan ◽  
Jin Nan Zhang
Keyword(s):  
Buffer Management ◽  
Transport Rate ◽  
Optimization Approach ◽  
Data Transport ◽  
Design And Implementation ◽  
End To End ◽  
Buffer Control ◽  
Improved Model ◽  
Eos System

We propose an optimization approach to EoS (Ethernet over SDH) buffer control which the objective is to dynamically adjust the EoS buffer management registers. We will present the improved model of the traffic buffer management based on embedded MCU to control the SDRAM of the EoS chip, and setup the end-to-end system to illustrate the feasibility and advantage of the solution in buffer management when the data transport rate suddenly exceed the bandwidth of Ethernet port.

scholarly journals Mitigation of packet loss with end-to-end delay in wireless body area network applications

2022 ◽  
Vol 12 (1) ◽  
pp. 460
Author(s):  
Suha Sahib Oleiwi ◽  
Ghassan N. Mohammed ◽  
Israa Al_Barazanchi
Keyword(s):  
Network Lifetime ◽  
Routing Protocol ◽  
Packet Loss ◽  
Wireless Body Area Network ◽  
Body Area Network ◽  
Area Network ◽  
Body Area ◽  
Cooperative Routing ◽  
End To End Delay ◽  
End To End

The wireless body area network (WBAN) has been proposed to offer a solution to the problem of population ageing, shortage in medical facilities and different chronic diseases. The development of this technology has been further fueled by the demand for real-time application for monitoring these cases in networks. The integrity of communication is constrained by the loss of packets during communication affecting the reliability of WBAN. Mitigating the loss of packets and ensuring the performance of the network is a challenging task that has sparked numerous studies over the years. The WBAN technology as a problem of reducing network lifetime; thus, in this paper, we utilize cooperative routing protocol (CRP) to improve package delivery via end-to-end latency and increase the length of the network lifetime. The end-to-end latency was used as a metric to determine the significance of CRP in WBAN routing protocols. The CRP increased the rate of transmission of packets to the sink and mitigate packet loss. The proposed solution has shown that the end-to-end delay in the WBAN is considerably reduced by applying the cooperative routing protocol. The CRP technique attained a delivery ratio of 0.8176 compared to 0.8118 when transmitting packets in WBAN.

Risk-balanced dimensioning and pricing of End-to-End differentiated services

2016 ◽  
Vol 254 (2) ◽  
pp. 644-655 ◽  
Author(s):  
Alexei A. Gaivoronski ◽  
Per-Jonny Nesse ◽  
Olav-Norvald Østerbo ◽  
Håkon Lønsethagen
Keyword(s):  
Differentiated Services ◽  
End To End

scholarly journals Providing Differentiated Services Over Shared Wireless Downlink Through Buffer Management

2008 ◽  
Vol 57 (1) ◽  
pp. 548-555 ◽  
Author(s):  
Junhua Tang ◽  
Gang Feng ◽  
Chee-Kheong Siew ◽  
Liren Zhang
Keyword(s):  
Buffer Management ◽  
Differentiated Services

Optimizing User Quality of Experience through Overlay Routing, Bandwidth Management and Dynamic Trans-Coding

2012 ◽  
pp. 160-180
Author(s):  
Maarten Wijnants ◽  
Wim Lamotte ◽  
Bart De Vleeschauwer ◽  
Filip De Turck ◽  
Bart Dhoedt ◽  
...  
Keyword(s):  
Packet Loss ◽  
Quality Of Experience ◽  
Multimedia Data ◽  
Effective Bandwidth ◽  
Bandwidth Management ◽  
Multimedia Services ◽  
Overlay Routing ◽  
Last Mile ◽  
Time Critical

Accessing multimedia services via fixed and wireless networks has become common practice. These services are typically much more sensitive to packet loss, delay and/or congestion than traditional services. In particular, multimedia data is often time critical and, as a result, network issues are not well tolerated and significantly deteriorate the user’s Quality of Experience (QoE). Therefore, the authors propose a QoE optimization platform that is able to mitigate problems that might occur at any location in the delivery path from service provider to customer. More specifically, the distributed architecture supports overlay routing to circumvent erratic parts of the network core. In addition, it comprises proxy components that realize last mile optimization through automatic bandwidth management and the application of processing on multimedia flows. This paper introduces a trans-coding service for this proxy component which enables the transformation of H.264/AVC video flows to an arbitrary bitrate. Through representative experimental results, the authors illustrate how this addition enhances the QoE optimization capabilities of the proposed platform by allowing the proxy component to compute more flexible and effective bandwidth distributions.

Evaluating The Performance for DCF Protocol and EDCA Protocol

2015 ◽  
Vol 72 (5) ◽  
Author(s):  
Ahmed Abu-Khadrah ◽  
Zahriladha Zakaria ◽  
Mohdazlishah Othman
Keyword(s):  
Real Time ◽  
Packet Loss ◽  
Area Network ◽  
Distributed Coordination ◽  
Data Types ◽  
End To End Delay ◽  
Main Challenge ◽  
Qos Parameters ◽  
End To End ◽  
Coordination Function

Nowadays supporting quality of service (QOS) for real time application is the main challenge of the wireless area network. 802.11standards use distributed Coordination Function (DCF) protocol and Enhanced Distributed Channel Access (EDCA) protocol in the MAC layer. DCF protocol has only one queue for different data types, it deals with data depending on the arriving time. There is no priority to serve real time applications faster. However EDCA protocol has four queues and each queue works with specific data type. Voice, video, best effort and background are the different queues in the EDCA protocol. Different parameters and priorities are defined for each queue. The voice queue reserves the highest priority and serves its data first. In this paper QOS parameters are measured for both DCF and EDCA protocol by using OPNET simulation. The QOS parameters must reach the requirements to support QOS. The results show how QOS parameters do not reach the requirements when using DCF protocol. The values of the end to end delay and the packet loss percentage are 0.514second, 19.04% respectively. But, when using EDCA protocol the end to end delay becomes 0.0624 second and the percentage of the packet loss decreases until reach 0.00617%. So the QOS parameters achieve requirements with EDCA protocol and support QOS.

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