A call admission control scheme in cache-enabled satellite-terrestrial communication networks
01 Nov 2017-pp 250-254
TL;DR: Simulation result shows that higher system throughput can be achieved with the proposed call admission control scheme, while the QoS of users remains uninfluenced, and the Call Blocking Probability (CBP) of the system is reduced efficiently and the resource utilization is improved at the same time.
Abstract: Satellite-terrestrial communication network has been proposed in recent years, for its great potential in larger coverage and better load balancing ability for wireless communication networks. However, with the number of users and the traffic load in the network rapidly increasing, the resource of the system becomes more intense. Thus, a proper and high-efficient call admission control scheme is needed to balance the traffic load and properly allocate the limited wireless resources. This paper presents a call admission control scheme with additional consideration of users' Quality of Service (QoS) and cache technique. Firstly, a system model of the satellite-terrestrial communication network is introduced. After that, an objective function of the system throughput is derived and laterly optimized with genetic algorithm. Simulation result shows that higher system throughput can be achieved with the proposed scheme, while the QoS of users remains uninfluenced. Besides, the Call Blocking Probability (CBP) of the system is reduced efficiently, and the resource utilization is improved at the same time.
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06 May 2020
TL;DR: The proposed approach is based on Markovian channel models for three types of rain events, namely widespread, shower and drizzle, and the mitigation of the experienced attenuation by AMC and results show that the four prediction intervals achieve optimal resource utilization during each of these rain events.
Abstract: In order to increase capacity and cope with increasing traffic and number of connected users, satellite networks are being migrated to higher frequencies in the Ka, Q and V bands But transmitted signals at these frequencies may experience moderate to severe deterioration due to rain attenuation Radio Resource Management (RRM) techniques such as Adaptive Modulation and Coding (AMC) and Connection Admission Control (CAC) are usually employed to mitigate the impact of rain attenuation and guarantee the satisfaction of the Quality of Service (QoS) requirements of connected users but their efficiency is connected with how well the state of the channel is known A joint implementation of AMC and CAC also determines the efficiency with which network resources are being utilized This paper presents an approach towards improving the efficiency of spectrum utilization through the prediction of rain attenuation at different intervals within the duration of any connection’s lifetime The proposed approach is based on Markovian channel models for three types of rain events, namely widespread, shower and drizzle, and the mitigation of the experienced attenuation by AMC Simulation results show that the four prediction intervals achieve optimal resource utilization during each of these rain events
1 citations
01 Sep 2019
TL;DR: This paper considers the implementation of an adaptive modulation and coding scheme to mitigate the effects of the dynamic channel conditions experienced by users in two environments (urban and suburban) and proposes a call admission control (CAC) policy to guarantee the satisfaction of accepted users' QoS requirements and efficiently utilize the network resources.
Abstract: Mobile satellite terminals may experience variations in the intensity and quality of their received signals as they traverse different environments. This variation is experienced due to the received signal being composed of varied proportions of line-of-sight (LOS), non-line-of-sight (NLOS) and/or shadowed signal components at the receiver. As a consequence, the satisfaction of the mobile users' quality of service (QoS) requirements may be adversely affected and network resource utilization becomes inefficient. This paper considers the implementation of an adaptive modulation and coding scheme to mitigate the effects of the dynamic channel conditions experienced by users in two environments (urban and suburban) and proposes a call admission control (CAC) policy to guarantee the satisfaction of accepted users' QoS requirements and efficiently utilize the network resources.
Cites background from "A call admission control scheme in ..."
...In [8], [9], the authors developed CAC policies to maximize network throughput....
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References
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21 Mar 1999
TL;DR: This paper investigates the page request distribution seen by Web proxy caches using traces from a variety of sources and considers a simple model where the Web accesses are independent and the reference probability of the documents follows a Zipf-like distribution, suggesting that the various observed properties of hit-ratios and temporal locality are indeed inherent to Web accesse observed by proxies.
Abstract: This paper addresses two unresolved issues about Web caching. The first issue is whether Web requests from a fixed user community are distributed according to Zipf's (1929) law. The second issue relates to a number of studies on the characteristics of Web proxy traces, which have shown that the hit-ratios and temporal locality of the traces exhibit certain asymptotic properties that are uniform across the different sets of the traces. In particular, the question is whether these properties are inherent to Web accesses or whether they are simply an artifact of the traces. An answer to these unresolved issues will facilitate both Web cache resource planning and cache hierarchy design. We show that the answers to the two questions are related. We first investigate the page request distribution seen by Web proxy caches using traces from a variety of sources. We find that the distribution does not follow Zipf's law precisely, but instead follows a Zipf-like distribution with the exponent varying from trace to trace. Furthermore, we find that there is only (i) a weak correlation between the access frequency of a Web page and its size and (ii) a weak correlation between access frequency and its rate of change. We then consider a simple model where the Web accesses are independent and the reference probability of the documents follows a Zipf-like distribution. We find that the model yields asymptotic behaviour that are consistent with the experimental observations, suggesting that the various observed properties of hit-ratios and temporal locality are indeed inherent to Web accesses observed by proxies. Finally, we revisit Web cache replacement algorithms and show that the algorithm that is suggested by this simple model performs best on real trace data. The results indicate that while page requests do indeed reveal short-term correlations and other structures, a simple model for an independent request stream following a Zipf-like distribution is sufficient to capture certain asymptotic properties observed at Web proxies.
3,582 citations
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...represents the probability of the f-th file of being applied for, which follows the Zipf-like distribution [8]....
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TL;DR: A novel edge caching scheme based on the concept of content-centric networking or information-centric networks is proposed and evaluated, using trace-driven simulations to evaluate the performance of the proposed scheme and validate the various advantages of the utilization of caching content in 5G mobile networks.
Abstract: The demand for rich multimedia services over mobile networks has been soaring at a tremendous pace over recent years. However, due to the centralized architecture of current cellular networks, the wireless link capacity as well as the bandwidth of the radio access networks and the backhaul network cannot practically cope with the explosive growth in mobile traffic. Recently, we have observed the emergence of promising mobile content caching and delivery techniques, by which popular contents are cached in the intermediate servers (or middleboxes, gateways, or routers) so that demands from users for the same content can be accommodated easily without duplicate transmissions from remote servers; hence, redundant traffic can be significantly eliminated. In this article, we first study techniques related to caching in current mobile networks, and discuss potential techniques for caching in 5G mobile networks, including evolved packet core network caching and radio access network caching. A novel edge caching scheme based on the concept of content-centric networking or information-centric networking is proposed. Using trace-driven simulations, we evaluate the performance of the proposed scheme and validate the various advantages of the utilization of caching content in 5G mobile networks. Furthermore, we conclude the article by exploring new relevant opportunities and challenges.
1,098 citations
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...It has been proved that using caching technology is an efficient way to improve system performance in terrestrial networks, which could reduce transmission delay and bandwidth consumption[6]....
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01 Sep 2016
TL;DR: This paper presents a dynamic backhaul network based on the seamless integration of the satellite component in a terrestrial network capable of reconfiguring its topology according to the traffic demands to face some of the main 5G challenges.
Abstract: This paper presents a dynamic backhaul network in order to face some of the main 5G challenges such as 100% coverage, improved capacity or reduction in energy consumption. The proposed solution, elaborated within the SANSA H2020 project, is based on the seamless integration of the satellite component in a terrestrial network capable of reconfiguring its topology according to the traffic demands. The paper highlights the benefits of this hybrid network and describes the technology enablers to bring it to the reality. Finally, the SANSA’s network simulation framework based on ns3 is presented, jointly with a preliminary analysis of the routing and load balancing needs for a hybrid and dynamic network.
36 citations
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01 Dec 2016
TL;DR: In this article, the authors considered the optimal caching and user association to minimize the total time to satisfy the average demands in cached-enabled Hetnets with wireless backhaul and formulated the problem as a mixed discrete-continuous optimization for given bandwidth and cache resources.
Abstract: Heterogenous wireless networks (Hetnets) provide a powerful approach to meet the massive growth in traffic demands, but also impose a significant challenge on backhaul. Caching at small base stations (BSs) and wireless small cell backhaul have been proposed as attractive solutions to address this new challenge. In this paper, we consider the optimal caching and user association to minimize the total time to satisfy the average demands in cached-enabled Hetnets with wireless backhaul. We formulate this problem as a mixed discrete- continuous optimization for given bandwidth and cache resources. First, we characterize the structure of the optimal solution. Specifically, we show that the optimal caching is to store the most popular files at each pico BS, and the optimal user association has a threshold form. We also obtain the closed-form optimal solution in the homogenous scenario of pico cells. Then, we analyze the impact of bandwidth and cache resources on the minimum total time to satisfy the average demands. Finally, using numerical simulations, we verify the analytical results.
29 citations
23 Oct 2014
TL;DR: It is shown that modern satellite networks can be readily integrated to support the emerging standards and provide resilient backhauls in the 5G networks that will emerge.
Abstract: This paper looks at the implications, benefits and opportunities for integrating satellite links into the Future Internet specifically to provide resilient backhauls in the 5G networks that will emerge. This analysis is based on the study performed under ESA ARTES 1 “Service delivery over integrated satellite and terrestrial networks”, contract 4000106656/12/NL/US. This study considered the integration of satellite networks with the Future Internet and 4G networks. This paper extrapolates this ESA study to providing 5G resilient backhaul links. It identifies a number of operator and user benefits for such integration and shows that modern satellite networks can be readily integrated to support the emerging standards.
19 citations
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