共查询到20条相似文献,搜索用时 15 毫秒
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Kihyun Pyun Dong-Ho Cho 《Communications Letters, IEEE》2004,8(3):192-194
An optimal service allocation scheme that can be used in RSVP (ReSerVation Protocol) signaling protocol is proposed to admit real-time sessions with deterministic delay bounds as many as possible. The big merit of our scheme is that it operates in the framework of RSVP, which is recommended by the IETF. 相似文献
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Yi Sun Yucheng Zhang Yilin Song Eryk Dutkiewicz 《Wireless Personal Communications》2011,60(4):769-807
In recent years, with the development of mobile communication technologies and the increase of available wireless transmission
bandwidth, deploying multimedia services in next generation mobile IPv6 networks has become an inevitable trend. RSVP (resource
reservation protocol) proposed by the IETF is designed for hardwired and fixed networks and can not be used in mobile environments.
This paper proposes a protocol, called Fast RSVP, to reserve resources for mobile IPv6. The protocol adopts a cross-layer
design approach where two modules (RSVP module and Mobile IPv6 module) at different layers cooperate with each other. Fast
RSVP divides a handover process with QoS guarantees into two stages: (1) setup of the resource reservation neighbor tunnel
and (2) resource reservation on the optimized route. It can help a mobile node realize fast handover with QoS guarantees as
well as avoid resource wasting by triangular routes, advanced reservations and duplicate reservations. In addition, fast RSVP
reserves “guard channels” for handover sessions, thus greatly reducing the handover session forced termination rate while
maintaining high performance of the network. Based on extensive performance analysis and simulations, Fast RSVP, compared
with existing methods of resource reservation in mobile environments, performs better in terms of packet delay and throughput
during handover, QoS recovery time after handover, resource reservation cost, handover session forced termination rate and
overall session completion rate. 相似文献
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Internet quality of service (QoS) is still a highly debated topic for more than fifteen years. Even with the large variety of QoS proposals and the impressive research advances, there is little deployment yet of network layer QoS technology. One specific problem domain is QoS signalling, which has recently attracted increasing attention to bring forward new standardization approaches. In this paper, an extensive study of RSVP is presented, covering protocol design, software design, and performance aspects of the basic version of RSVP and of certain standardized and experimental extensions. This work is based on and presents the experience from implementing RSVP for UNIX systems and the ns-2 simulation environment. The implementation includes a variety of protocol extensions and incorporates several internal improvements. It has been subject to extensive functional and performance evaluations, the results of which are reported here. 相似文献
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Dynamic reservation TDMA protocol for wireless ATM networks 总被引:2,自引:0,他引:2
Frigon J.-F. Leung V.C.M. Chan Bun Chan H. 《Selected Areas in Communications, IEEE Journal on》2001,19(2):370-383
A dynamic reservation time division multiple access (DR-TDMA) control protocol that extends the capabilities of asynchronous transfer mode (ATM) networks over the wireless channel is proposed in this paper. DR-TDMA combines the advantages of distributed access and centralized control for transporting constant bit rate (CBR), variable bit rate (VBR), and available bit rate (ABR) traffic efficiently over a wireless channel. The contention slots access for reservation requests is governed by the framed pseudo-Bayesian priority (FPBP) Aloha protocol that provides different access priorities to the control packets in order to improve the quality-of-service (QoS) offered to time sensitive connections. DR-TDMA also features a novel integrated resource allocation algorithm that efficiently schedules terminals' reserved access to the wireless ATM channel by considering their requested bandwidth and QoS. Integration of CBR, voice, VBR, data, and control traffic over the wireless ATM channel using the proposed DR-TDMA protocol is considered in this paper. Simulation results are presented to show that the protocol respects the required QoS of each traffic category while providing a highly efficient utilization of approximately 96% for the wireless ATM channel 相似文献
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RSVP: a new resource ReSerVation Protocol 总被引:4,自引:0,他引:4
A resource reservation protocol (RSVP), a flexible and scalable receiver-oriented simplex protocol, is described. RSVP provides receiver-initiated reservations to accommodate heterogeneity among receivers as well as dynamic membership changes; separates the filters from the reservation, thus allowing channel changing behavior; supports a dynamic and robust multipoint-to-multipoint communication model by taking a soft-state approach in maintaining resource reservations; and decouples the reservation and routing functions. A simple network configuration with five hosts connected by seven point-to-point links and three switches is presented to illustrate how RSVP works. Related work and unresolved issues are discussed 相似文献
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HMRSVP: A Hierarchical Mobile RSVP Protocol 总被引:9,自引:0,他引:9
In this paper, we propose a hierarchical Mobile RSVP (HMRSVP) that can achieve mobility independent QoS-guaranteed services in mobile computing environments. The HMRSVP integrates RSVP with Mobile IP regional registration and makes advance resource reservations only when an inter-region movement may possibly occur. We first show that, by NS simulator, our HMRSVP can achieve the same QoS guarantees as MRSVP does with fewer resource reservations. Then, we show that HMRSVP outperforms MRSVP in terms of reservation blocking, forced termination and session completion probabilities. 相似文献
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战术数据链(TDL)的作用就是在战场上能够更准确、有效和快速地传递战术情报。随着军事信息技术的发展,战场上的节点数量和传输数据呈现快速增长趋势。传统的战术数据链媒介访问控制(MAC)协议为了保证QoS,一般采用固定资源分配的多址访问算法,如TDMA,在面对大容量、高速率的需求时缺乏灵活性和有效性。为此,研究了基于统计优先级多址访问(SPMA)算法,提出了直接映射和差分趋势两种动态门限方法。仿真结果表明,动态门限比固定门限能够有效提高系统效率,更接近目标信道忙闲比设计,并且在相同负载下网络吞吐量也较固定门限高。 相似文献
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Wireless Networks - Currently, IEEE 802.11 standard for ad-hoc wireless mode is inadequate for multi-hop network. Recent efforts for the advancement of 802.11 standards, such as 11e for QoS support... 相似文献
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提出一种在无线移动环境下保障用户通信服务质量的资源预留扩展方案。该方案有效地利用了FMIPv6(Fast Handovers for Mobile IPv6)的工作过程,通过扩展FBU(Fast Binding Update)和HI(Handoff Initiate)消息,使其能够携带QoS(Quality of Service)对象,从而将移动管理和资源预留两个过程合并为一个过程。该方案引入了提前预留与公共路径利用等一系列新机制。分析结果表明,在无线移动环境下该方案能够有效地降低预留重建延迟,提高了链路资源的使用效率。 相似文献
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移动IP技术能够支持基于IP的无线网络,资源预留协议(RSVP)用来保证多媒体传输的服务质量。然而把现有的RSVP应用于移动IP网络就会存在许多问题。提出了一种改进的RSVP支持方案(ERSVP)来实现无线IP网络的服务质量保证。ERSVP在分层网络中结合了MRSVP和RSVP隧道技术。根据性能分析,ERSVP方案能够获得比MRSVP较少的信令延迟、信令负载和资源耗费。 相似文献
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Sarantis Paskalis Alexandros Kaloxylos Evangelos Zervas Lazaros Merakos 《Mobile Networks and Applications》2003,8(3):197-207
During the past years, several attempts have been made to develop functionality for mobility management support and QoS provision in the realm of the IP networks. Since IP was not designed to support such functionality, new protocols have been specified and implemented to tackle these issues. Mobile IP is currently the dominant protocol that allows users to retain connectivity while roaming in IP networks. RSVP (Resource reSerVation Protocol) is a well established protocol for reserving network resources to support QoS requirements. These protocols, when deployed separately, can work quite efficiently. However, if their functionality is combined, several inefficiencies arise in terms of QoS deterioration and misuse of the network resources. To minimize these inefficiencies, we propose a new approach that limits mobility and QoS related network modifications inside the domain, in which a user moves. The deployment of our scheme enhances the network resource usage efficiency, while minimizing the duration of the QoS deterioration experienced after a terminal movement. To quantify the advantages of our proposal, we have developed an analytical and a simulation model that we also present in this paper. 相似文献
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Jae Hwoon Lee Chong Kwan Un 《Lightwave Technology, Journal of》1996,14(7):1595-1600
In a single-hop star network based on wavelength division multiplexing (WDM), a protocol is needed for the transmitter and receiver to coordinate message transmission. This paper proposes a dynamic scheduling protocol which can efficiently support variable-sized messages, where a control channel is used to coordinate transmissions on data channels. The protocol does not require any global information. Therefore, it can operate independently of the change of the number of nodes, and any new node can join the network at any time without requiring network initialization. Moreover, with the protocol, one can avoid data channel and destination conflicts. The protocol is analyzed with a finite population model and the throughput-delay characteristics are investigated as performance measures 相似文献
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