scholarly journals Adaptive channel-superframe allocation (ACSA) for 20 GHz wireless networks

2021 ◽  
Author(s):  
Majid Veyseh
Keyword(s):  
Real Time ◽  
Bandwidth Allocation ◽  
Performance Metrics ◽  
Channel Allocation ◽  
Center Frequency ◽  
60 Ghz ◽  
Allocation Algorithm ◽  
Ieee 802.15.3 ◽  
Simulation Results

Millimeter-wave (MMW) systems are high frequency wireless systems with a center frequency of around 60 GHz. This thesis deals with adaptive channel-superframe allocation (ACSA) for such system. An adaptive bandwidth or channel allocation algorithm is utilized in the piconet controller (PNC) and a new superframe structure is designed in order to distribute bandwidth among real-time (RT) and non-real-time (NRT) flows. We propose to serve RT and NRT flows separately in different channels instead of serving them in different times. We also propose to 'change the sliced superframe of IEEE 802.15.3 to an adaptive unsliced superframe in order to decrease the TCP round-trip time. We simulated a MMW system with appropriate parameters using 802.15.3 MAC as well as ACSA MAC. We meaSured three performance metrics (throughput, delay and fairness), which we aimed to improve in our superframe design. The simulation results show that the adaptive superframe structure . could provide' throughput improvements not only for NRT flows, but also for RT flows. The control algorithm in PNC could manage the bandwidth allocation in superframe and improve the throughput of RT flows. The channel access delay is improved by providing an unsliced superframe, which eliminated an imposed delay on TCP connections. Finally, the better distribution of bandwidth in ACSA MAC improves the fairness of the system. As a brief, the simulation results support the analysis of the proposed adaptive channelsuperframe allocation algorithm, which could generally improve the quality of service for MMW systems.

Adaptive channel-superframe allocation (ACSA) for 20 GHz wireless networks

2021 ◽  
Author(s):  
Majid Veyseh
Keyword(s):  
Real Time ◽  
Bandwidth Allocation ◽  
Performance Metrics ◽  
Channel Allocation ◽  
Center Frequency ◽  
60 Ghz ◽  
Allocation Algorithm ◽  
Ieee 802.15.3 ◽  
Simulation Results

Millimeter-wave (MMW) systems are high frequency wireless systems with a center frequency of around 60 GHz. This thesis deals with adaptive channel-superframe allocation (ACSA) for such system. An adaptive bandwidth or channel allocation algorithm is utilized in the piconet controller (PNC) and a new superframe structure is designed in order to distribute bandwidth among real-time (RT) and non-real-time (NRT) flows. We propose to serve RT and NRT flows separately in different channels instead of serving them in different times. We also propose to 'change the sliced superframe of IEEE 802.15.3 to an adaptive unsliced superframe in order to decrease the TCP round-trip time. We simulated a MMW system with appropriate parameters using 802.15.3 MAC as well as ACSA MAC. We meaSured three performance metrics (throughput, delay and fairness), which we aimed to improve in our superframe design. The simulation results show that the adaptive superframe structure . could provide' throughput improvements not only for NRT flows, but also for RT flows. The control algorithm in PNC could manage the bandwidth allocation in superframe and improve the throughput of RT flows. The channel access delay is improved by providing an unsliced superframe, which eliminated an imposed delay on TCP connections. Finally, the better distribution of bandwidth in ACSA MAC improves the fairness of the system. As a brief, the simulation results support the analysis of the proposed adaptive channelsuperframe allocation algorithm, which could generally improve the quality of service for MMW systems.

scholarly journals A Versatile Coexistence Decision-Making System for Efficient TV Whitespace Sharing among Whitespace Objects

2017 ◽  
Vol 2017 ◽  
pp. 1-20
Author(s):  
M. Asif Raza ◽  
Zafar Iqbal ◽  
Sang-Seon Byun ◽  
Hyunduk Kang ◽  
Heung-No Lee
Keyword(s):  
Decision Making ◽  
Performance Metrics ◽  
Channel Allocation ◽  
System Throughput ◽  
System Quality ◽  
System A ◽  
Throughput Gain ◽  
Decision Making System ◽  
Qos Performance

A coexistence decision-making (CDM) system for efficient TV whitespace (TVWS) sharing among whitespace objects (WSOs) is introduced in this paper. The proposed system is considered versatile in functionality as it jointly takes care of three distinct channel allocation features: (a) optimizing system quality of service (QoS) performance metrics, (b) improving TVWS utility, and (c) satisfying WSO channel demands. Regarding system QoS performance metrics, the TVWS sharing problem is defined as an optimization problem with an aim to maximize the system throughput and minimize unfairness in allocation. Supporting the WSOs channel demands in a TVWS sharing problem is a multifold task which requires elaborate consideration in different aspects of the system performance. To this end, the variations of the SNR of wireless frequency channels which result in variable throughput gain of the WSOs are also taken care of in the proposed CDM system. A fast channel allocation algorithm is then designed that implements the TVWS sharing mechanism in a reasonable amount of time. Additionally, the proposed algorithm improves the TVWS utility by promoting a novel frequency reuse method by exploiting the inter-WSO interference information. Simulation results show the superiority of the proposed algorithm over existing TVWS sharing algorithms.

Hierarchical QoS Admission Control Mechanism for IEEE 802.16j Mobile Multi-Hop Relay WiMAX Network

2014 ◽  
pp. 205-218
Author(s):  
Rohaiza Yusoff ◽  
Mohd Dani Baba ◽  
Muhammad Ibrahim
Keyword(s):  
Real Time ◽  
Admission Control ◽  
Performance Metrics ◽  
Control Mechanism ◽  
Bandwidth Utilization ◽  
Control Approach ◽  
Ieee 802.16J ◽  
Set Up ◽  
Wimax Network

This chapter presents some performance issues in Worldwide Interoperability for Microwave Access (WiMAX) network and focus on the capability of non-transparent relay in Mobile Multi-Hop Relay (MMR) WiMAX Network. In this work, an admission control mechanism with hierarchy Quality of Service (QoS) is developed for the relay architecture. An open source-based simulator is used to evaluate the three types of QoS classes, which are Unsolicited Grant Access (UGS), Real Time Polling Service (rtPS), and Non-Real Time Polling Service (nrtPS). Two scenarios of non-transparent relay topologies are set up for different numbers of subscribers with different types of QoS application classes. Three performance metrics, which are bandwidth utilization, number of slots used, and number of admitted service flow, are observed and plotted in graph. The results show the hierarchy-based QoS admission control mechanism can enhance the throughput of provided services by 35% compared to the conventional method without the admission control approach.

A MP2MP-DBA Algorithm in Home Network Based on 60GHz Millimeter-Wave Communication

2012 ◽  
Vol 263-266 ◽  
pp. 1028-1031
Author(s):  
Cai Li Du ◽  
Ke He ◽  
Xue Chen
Keyword(s):  
Millimeter Wave ◽  
Bandwidth Allocation ◽  
Network Simulation ◽  
Home Network ◽  
Allocation Algorithm ◽  
Simulation Results ◽  
Throughput And Delay ◽  
Millimeter Wave Communication ◽  
Bandwidth Allocation Algorithm

A novel multipoint-to-multipoint bandwidth allocation algorithm named MP2MP-DBA based on 60GHz millimeter-wave communication is proposed for home network. Simulation results show that the MP2MP-DBA achieves better throughput and delay than static bandwidth allocation algorithm.

A multi-level satellite channel allocation algorithm for real-time VBR data

2001 ◽  
Vol 20 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Nedo Celandroni ◽  
Erina Ferro ◽  
Francesco Potortí
Keyword(s):  
Real Time ◽  
Channel Allocation ◽  
Allocation Algorithm ◽  
Multi Level

scholarly journals Admission Control and Bandwidth Allocation for Class A Traffic in RPR Networks

2021 ◽  
Author(s):  
Zhenning Xu
Keyword(s):  
Admission Control ◽  
Bandwidth Allocation ◽  
Control Mechanism ◽  
Available Bandwidth ◽  
Delay Performance ◽  
Low Delay ◽  
Admission Decision ◽  
Simulation Results ◽  
Allocation Algorithms

In this thesis, we study the admission control and bandwidth allocation methods for classA traffic in RPR networks. First, we investigate the performance of classA traffic under the current RPR protocol. The simulation results show that RPR networks can support low-delay classA traffic even if the networks are congested with classB and classC traffic. The low-delay performance, however, is subject to the condition that the load of classA traffic must be properly controlled. Consequently, an admission control mechanism must be used for classA traffic. In this thesis, several admission control algorithms are studied. They are the Simple Sum algorithm, the Measured Sum algorithm, and the Equivalent Bandwidth algorithm. The simulation results show that the Equivalent Bandwidth algorithm is the most suitable to use as the admission control mechanism for classA traffic. The admission control mechanism makes admission decision based on the available bandwidth allocated to the classA traffic. The existing RPR standard assumes the bandwidth allocated for classA traffic at each node is fixed. The fixed bandwidth allocation introduces inflexibility and inefficient use of bandwidth for classA traffic. In this thesis, three bandwidth allocation algorithms are proposed to dynamically allocate bandwidth for classA traffic. These algorithms have different levels of complexity and can be applied to different traffic environments. Simulation results show that the proposed algorithms improve the bandwidth efficiency of the RPR networks. The proposed algorithms are also readily integrated with the existing Internet Quality of Services (QoS) paradigms such as Diffserv and RSVP services.

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