• Title/Summary/Keyword: dynamic bandwidth allocation

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Implementation Feasibility of Dynamic carrier and bandwidth allocation method for OFDMA-PON (OFDMA-PON의 동적캐리어 및 대역할당 방법의 구현 타당성)

  • Seo, Sang Jun;Han, Man Soo
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.10a
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    • pp.973-974
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    • 2013
  • This paper analyzes a characteristic of dynamic carrier and bandwidth allocation methods of OFDMA PON. We then discuss the possible problems when we implement those methods in hardware.

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The Study on the Dynamic Bandwidth Allocation Algorithm using Cell Delay Variation (셀지연변이를 이용한 동적 대역폭 할당 알고리즘에 관한 연구)

  • 신승호;박상민
    • Journal of the Korea Safety Management & Science
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    • v.2 no.4
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    • pp.165-176
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    • 2000
  • Broadband networks are designed to support a wide variety of services with different traffic characteristics and demands for Quality of Services. Bandwidth allocation methods can be classified into two major categories: static and dynamic. In static allocation, bandwidth is allocated only at call setup time and the allocated bandwidth is maintained during a session. In dynamic allocation, the allocated bandwidth is negotiated during a session. The purpose of this paper is to develop policies for deciding and for adjusting the amount of bandwidth requested for a best effort connection over such as ATM networks.. This method is to develop such policies that a good trade off between utilization and latency using cell delay variation to the forecast the incoming traffic in the next period. The performances of the different polices are compared by simulations.

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The Study on the Dynamic Bandwidth Allocation Algorithm using by Cell Delay Variation (셀지연변이를 이용한 동적 대역폭 할당 알고리즘에 관한 연구)

  • 신승호;박상민
    • Proceedings of the Safety Management and Science Conference
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    • 2000.11a
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    • pp.131-134
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    • 2000
  • Broadband networks are designed to support a wide variety of services with different traffic characteristics and demands for Quality of Services. Bandwidth allocation methods can be classified into two major categories: static and dynamic. In static allocation, bandwidth is allocated only at call setup time and the allocated bandwidth is maintained during a session. In dynamic allocation, the allocated bandwidth is negotiated during a session. The purpose of this paper is to develop policies for deciding and for adjusting the amount of bandwidth requested for a best effort connection over such as ATM networks. This method is to develop such policies that a good trade off between utilization and latency using cell delay variation to the forecast the incoming traffic in the next period. The performances of the different polices are compared by simulations.

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Dynamic Right Sizing of Maximum-windows for Efficient Bandwidth Allocation on EPON (EPON에서 효율적 대역폭 할당을 위한 최대전송윈도우 크기의 동적변화기법)

  • Lee, Sang-Ho;Lee, Tae-Jin;Chung, Min-Young;Lee, You-Ho;Choo, Hyun-Seung
    • Journal of Internet Computing and Services
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    • v.8 no.4
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    • pp.41-49
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    • 2007
  • Ethernet passive optical network(EPON) is the next-generation technology for supporting services of high-quality at low-cost. In the EPON, all optical network units(ONUs) have to share a limited uplink channel for upstream data. In order to satisfy bandwidth demands of users on high-capacity local access networks(LANs), the optical line terminal(OLT) efficiently divides and allocates time slots of uplink channel to all ONUs. We discuss previous schemes for dynamic bandwidth allocation(DBA), such as interleaved polling with adaptive cycle time(IPACT) and sliding cycle time(SLICT). In this paper, dynamic right sizing of maximum-windows(DRSM), as a novel bandwidth allocation service, is proposed for more effective and efficient time slot allocation of the uplink channel. DRSM which is based on past information of bandwidth allocated by OLT calculates maximum available bandwidth and dynamically alters the maximum window size for the next ONU. This scheme does not only exert every effort to meet bandwidth demands of ONUs with the possible scope, it also seeks fairness of bandwidth allocation among ONUs.

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Dynamic Bandwidth Allocation Algorithm for Multimedia Services over Ethernet PONs

  • Choi, Su-Il;Huh, Jae-Doo
    • ETRI Journal
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    • v.24 no.6
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    • pp.465-468
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    • 2002
  • Ethernet passive optical networks (PONs) are an emerging access network technology that provides a low-cost method of deploying optical access lines between a carrier's central office and a customer site. In this paper, we propose a new algorithm of dynamic bandwidth allocation for multimedia services over Ethernet PONs. To implement the suggested dynamic bandwidth allocation algorithm, we present control message formats that handle classified bandwidths in a multi-point control protocol of Ethernet PONs.

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A Two-Step Scheduling Algorithm to Support Dual Bandwidth Allocation Policies in an Ethernet Passive Optical Network

  • Lee, Ho-Sook;Yoo, Tae-Whan;Moon, Ji-Hyun;Lee, Hyeong-Ho
    • ETRI Journal
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    • v.26 no.2
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    • pp.185-188
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    • 2004
  • In this paper, we design a two-step scheduling algorithm to support multiple bandwidth allocation policies for upstream channel access in an Ethernet passive optical network. The proposed scheduling algorithm allows us a simultaneous approach for multiple access control policies: static bandwidth allocation for guaranteed bandwidth service and dynamic bandwidth allocation for on-demand, dynamic traffic services. In order to reduce the scheduling complexity, we separate the process of the transmission start- time decision from the process of grant generation. This technique does not require the timing information of other bandwidth allocation modules, so respective modules are free from a heavy amount of timing information or complex processing.

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Dynamic Bandwidth Allocation Algorithm Utilizing Unused Bandwidth for XGPON (XGPON의 여유 대역폭을 활용한 동적대역할당 알고리즘)

  • Jeong, Jong Hoon;Han, Man Soo
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.05a
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    • pp.739-740
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    • 2013
  • This paper proposes a new dynamic bandwidth allocation algorithm for XGPON (10-Gigabit-capable passive optical network). The proposed algorithm uses a common service counter for each service class unlike to the existing algorithms. The unused bandwidth of a service class can be used for other service classes to increase bandwidth utilization. We illustrate examples to show the proposed algorithm is superior to existing algorithms.

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Intervenient Stackelberg Game based Bandwidth Allocation Scheme for Hierarchical Wireless Networks

  • Kim, Sungwook
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.8 no.12
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    • pp.4293-4304
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    • 2014
  • In order to ensure the wireless connectivity and seamless service to mobile users, the next generation network system will be an integration of multiple wireless access networks. In a heterogeneous wireless access system, bandwidth allocation becomes crucial for load balancing to avoid network congestion and improve system utilization efficiency. In this article, we propose a new dynamic bandwidth allocation scheme for hierarchical wireless network systems. First, we derive a multi-objective decision criterion for each access point. Second, a bargaining strategy selection algorithm is developed for the dynamic bandwidth re-allocation. Based on the intervenient Stackelberg game model, the proposed scheme effectively formulates the competitive interaction situation between several access points. The system performance of proposed scheme is evaluated by using extensive simulations. With a simulation study, it is confirmed that the proposed scheme can achieve better performance than other existing schemes under widely diverse network environments.

Efficient Differentiated Bandwidth Allocation for QoS based Ethernet PON System (QoS 기반의 EPON 시스템에서 효율적인 차등 대역폭 할당)

  • Eom Jong-Hoon;Jung Min-Suk;Kim Sung-Ho
    • Journal of KIISE:Information Networking
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    • v.32 no.2
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    • pp.156-166
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    • 2005
  • Ethernet passive optical network is an economical and efficient access network that has received significant research attention in recent years. A MAC(Media Access Control) protocol of PON, the next generation access network, is based on TDMA(Time Division Multiple Access) basically. In this thesis, we addressed the problem of dynamic bandwidth allocation in QoS based Ethernet PONs. We augmented the bandwidth allocation to support QoS in a differentiated services framework. Our differentiated bandwidth guarantee allocation(DBGA) allocates effectively and fairly bandwidths among end users. Moreover, we showed that DBGA that perform weighted bandwidth allocation for high priority packets result in better performance in terms of average and maximum packet delay, as well as network throughput compared with existing dynamic bandwidth allocations. We used simulation experiments to study the performance and validate the effectiveness of the proposed bandwidth allocations.

Hierarchical Dynamic Bandwidth Allocation Algorithm for Multimedia Services over Ethernet PONs

  • Ahn, Kye-Hyun;Han, Kyeong-Eun;Kim, Young-Chon
    • ETRI Journal
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    • v.26 no.4
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    • pp.321-331
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    • 2004
  • In this paper, we propose a new dynamic bandwidth allocation (DBA) algorithm for multimedia services over Ethernet PONs (passive optical networks). The proposed algorithm is composed of a low-level scheduler in the optical network unit (ONU) and a high-level scheduler in the optical line terminal (OLT). The hierarchical DBA algorithm can provide expansibility and efficient resource allocation in an Ethernet PON system in which the packet scheduler is separated from the queues. In the proposed DBA algorithm, the OLT allocates bandwidth to the ONUs in proportion to the weight associated with their class and queue length, while the ONU preferentially allocates its bandwidth to queues with a static priority order. The proposed algorithm provides an efficient resource utilization by reducing the unused remaining bandwidth caused by the variable length of the packets. We also define the service classes and present control message formats conforming to the multi-point control protocol (MPCP) over an Ethernet PON. In order to evaluate the performance, we designed an Ethernet PON system on the basis of IEEE 802.3ah "Ethernet in the first mile" (EFM) using OPNET and carried out simulations. The results are analyzed in terms of the channel utilization, queuing delay, and ratio of the unused remaining bandwidth.

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