Description: 在网络仿真模拟工具下实现支持QoS的MAC层EDCF协议-In the network simulation tool to achieve the MAC layer QoS support EDCF agreement Platform: |
Size: 3091456 |
Author:kaigo |
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Description: 802.16 Qos仿真平台的c++实现，应用环境NS-2.29，实现了802.16的基本流程和Qos功能，对于从事无线城域网的研究人员来说，具有非常大的价值-802.16 Qos simulation platform c++ Realization application environment NS-2.29, achieving 802.16 for the basic processes and Qos function, for wireless metropolitan area network for researchers, with very large value Platform: |
Size: 101376 |
Author:jame |
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Description: INSIGNIA是专门为无线ad hoc网络设计的qos信令协议-INSIGNIA is designed for wireless ad hoc network design of the QoS signaling protocol Platform: |
Size: 28672 |
Author:代亮 |
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Description: —One of themajor challenges in supportingmultimedia
services over Internet protocol (IP)-based code-division mul-
tiple-access (CDMA) wireless networks is the quality-of-service
(QoS) provisioning with effi cient resource utilization. Compared
with the circuit-switched voice service in the second-generation
CDMA systems (i.e., IS-95), heterogeneous multimedia applica-
tions in future IP-based CDMA networks require more complex
QoS provisioning and more sophisticated management of the
scarce radio resources. This paper provides an overview of the
CDMA-related QoS provisioning techniques in the avenues of
packet scheduling, power allocation, and network coordination,
summarizes state-of-the-art research results, and identifi es further
research issues. Platform: |
Size: 408576 |
Author:Duc Long |
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Description: 通信技术发展要求蜂窝运营商必须能够支持新的3G技术，在一个充满竞争的市场机制下以合理的价格提供基于多媒体业务的无线Internet能力，本书以此为蓝图主要从3部分进行阐述：
·集中阐述了GSM系统如何完全无缝演化为支持UMTS业务的GERAN。部分内容还包括演化过程中涉及的功能、结构组成、系统统一以及3G网络提出的各种UMTS QoS要求等。
·从仿真和实际系统测试的角度阐述各种先进技术的性能。本部分全面讨论了GSM、GPRS、EDGE、AMR和支持3G业务的GERAN等系统工技术的特征和性能。同时也介绍了无线接入网络的自动规划、优化和运营方法和技术。阐述了跳频技术的自动规划和无线资源管理各参数的优化等，另外对系统出现故障或者崩溃的各种原因进行了分析。
·讨论了各种不同的3G无线技术，同时说明了GERAN在这些技术中所处的地位。分析了各种演化策略，描绘了3G多无线接入网络的场景，阐述了内在的GSM和WCDMA系统无缝融合技术。 -Communication technology requirements of the development of cellular operators must be able to support the new 3G technology, in a competitive market mechanism to provide a reasonable price of wireless multimedia services based on Internet capabilities, this book as a blueprint for the major part of from 3:
Focused on how the system completely seamless GSM Evolution UMTS business to support GERAN. Part of the contents of the course also includes the evolution of function, structure, systems, and unification of the various 3G networks UMTS QoS requirements.
Simulation and from the perspective of the actual system testing on the performance of various advanced technologies. A comprehensive discussion of this part of the GSM, GPRS, EDGE, AMR and support for 3G systems such as GERAN business techniques and performance characteristics. At the same time, also introduced an automatic wireless access network planning, optimization and operation of methods and techniques. On the automatic fre Platform: |
Size: 27729920 |
Author:李东 |
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Description: Advances of diverse wireless access technologies are
defining the trends of future wireless networks, named Next
Generation Wireless Networks (NGWN), where several access
technologies will coexist and devices will be equipped with
different network interfaces, in order to take advantage of each
access technology. In NGWN communication maintenance is a
concept willing to reach. Therefore, strategies to tackle
mobility and multihoming issues are required. In this paper we
propose an extension of HIP in order to cover challenges that
end to end mobility presents in NGWN. Our approach consists
on sending access technology related information before
handover execution occurs, in order to optimize handover
process. Moreover, the extension tackles QoS issues by sending
application requirements as well as restrictions or
improvements affecting its performance in the new access
technology. Platform: |
Size: 1002496 |
Author:serag |
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Description: "Advanced Wireless Networks 4G Technologies". New E-Book. In the wireless communications community we are witnessing more and more the existence
of the composite radio environment (CRE) and as a consequence the need for reconfigurability
concepts. The CRE assumes that different radio networks can be cooperating components
in a heterogeneous wireless access infrastructure, through which network providers
can more efficiently achieve the required capacity and quality of service (QoS) levels. Reconfigurability
enables terminals and network elements to dynamically select and adapt
to the most appropriate radio access technologies for handling conditions encountered in
specific service area regions and time zones of the day. Both concepts pose new requirements
on the management of wireless systems. Nowadays, a multiplicity of radio access
technology (RAT) standards are used in wireless communications. Platform: |
Size: 12845056 |
Author:Mantvydas |
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Description: In a Wireless Mesh Network (WMN), the traffic is
aggregated and forwarded towards the gateways. Strategically
placing and connecting the gateways to the wired backbone is
critical to the management and efficient operation of a WMN.
In this paper, we address the problem of gateways placement,
consisting in placing a minimum number of gateways such that
QoS requirements are satisfied. We propose a polynomial time
near-optimal algorithm which recursively computes minimum
weighted Dominating Sets (DS), while consistently preserving
QoS requirements across iterations. We evaluate the
performance of our algorithm using both analysis and
simulation, and show that it outperforms other alternative
schemes by comparing the number of gateways placed in
different scenarios. -In a Wireless Mesh Network (WMN), the traffic is
aggregated and forwarded towards the gateways. Strategically
placing and connecting the gateways to the wired backbone is
critical to the management and efficient operation of a WMN.
In this paper, we address the problem of gateways placement,
consisting in placing a minimum number of gateways such that
QoS requirements are satisfied. We propose a polynomial time
near-optimal algorithm which recursively computes minimum
weighted Dominating Sets (DS), while consistently preserving
QoS requirements across iterations. We evaluate the
performance of our algorithm using both analysis and
simulation, and show that it outperforms other alternative
schemes by comparing the number of gateways placed in
different scenarios. Platform: |
Size: 240640 |
Author:Dinh Huu Nghia |
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Description: 无线通信网络的发展趋势之一是将各种不同无线接入技术进行融合。多接入选择作为无线资源管理中的关键技术是目前异构网融合的研究热点之一。从用户的利益出发，充分考虑预接入网络的费用、QoS 和稳定性；假定不同的网络运营商之间是彼此竞争的，即没有达成统一的协议，提出了一种结合目标代价函数与层次分析法的动态多接入选择算法。通过对影响因素进行分析和二次判断，建立了网络选择决策模型，仿真结果验证了该算法的正确性与有效性。-Trends in wireless communication network is one of a variety of different wireless access technologies will be integrated. Multi-access radio resource management in selection as the key technology is the integration of heterogeneous networks of research focus. From the user' s interests fully into account the cost of pre-access networks, QoS and stability assumed between different network operators are competing with each other, that did not reach uniform agreement, proposed a combination of objective cost function and level analysis of dynamic multi-access selection algorithm. Through analysis of the factors affecting the judge and the second, the establishment of a network selection decision-making model, simulation results verify the correctness and validity of the algorithm. Platform: |
Size: 2860032 |
Author:廖腾飞 |
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Description: WiMAX and WiFi have emerged as promising
broadband access solutions for the latest generation of wireless
MANs and LANs, respectively. Their complementary features
enable the use of WiMAX as a backhaul service to connect
multiple dispersed WiFi hotspots to the Internet. This study
proposes an integrated architecture utilizing a novel
WiMAX/WiFi Access Point (W2-AP) device to effectively combine
the WiMAX and WiFi technologies. In the proposed architecture,
the protocol operation of the WiFi hotspots is the same as that of
the WiMAX system. As a result, the WiFi network can support
connection-oriented transmissions and QoS in a similar fashion to
the WiMAX system, and thus a considerable improvement in the
delay performance is obtained. The numerical results obtained
using a Qualnet simulator confirm both the effectiveness and the
efficiency of the proposed architecture. Platform: |
Size: 346112 |
Author:avinash trivedi |
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Description: Producing the quality of service in wireless network is a complex subject because of constraints related to the ad hoc mode as limited bandwidth, sharing medium...etc. The traditional routing based on hop count metric doesn’t take in its consideration
the quality of the wireless link which causes the rate reduction in the network. In an effort to improve the performance of Mobile Ad hoc Network (MANET), cross-layer technique is implemented. It aimed to
resolve QOS problems in manet and permit to share information about network status between different layers. Platform: |
Size: 230400 |
Author:NIRDESH |
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Description: While the Quality of Service (QoS) offered to users may be enhanced through innovative protocols and new technologies, future trends should take into account the efficiency of resource allocation and network/terminal cooperation as well. Game theory techniques have widely been applied to various engineering design problems in which the action of one component has impact on (and perhaps conflicts with) that of any other component. Therefore, game formulations are used, and a stable solution for the players is obtained through the concept of equilibrium. This survey collects applications of game theory in wireless networking and presents them in a layered perspective, emphasizing on which fields game theory could be effectively applied. To this end, several games are modeled and their key features are exposed. Platform: |
Size: 283648 |
Author:lauferking |
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Description: There is a growing interest of wireless
operators to migrate their existing 3G networks to
different 4G technologies such as Wi MAX and L TE. In
this heterogeneous environment of wireless networks
and architectures, one of the major concerns is how to
allocate network resources efficiently to diverse traffic
classes with different QoS constraints. Further it has
been convincingly demonstrated through numerous
high quality studies that multimedia traffic found in
modern wireless networks exhibits Long-Range
Dependence (LRD) and self-similarity, a phenomenon
which cant' be captured by traditional traffic modeling
based on simplistic Poisson model. Platform: |
Size: 357376 |
Author:hicham
|
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