Study on Performance Analysis of Multimedia Traffic and Access Methods in Mobile Communication Systems

移动通信系统多媒体流量性能分析及接入方法研究

• 批准号: 13650440
• 负责人: YUE Wuyi
• 金额: $ 1.28万
• 依托单位: Konan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650440/
• 关键词: Multimedia Traffic; Access Methods; Multimedia Communications; Mobile Wireless Networks; Optimal Channel Assignments; Performance Analysis; Computer Simulations; Optimality Equation; 自立分散制御

In this study :(1) We first evaluated the performance of Bluetooth. Next, we evaluated the characteristics of both WLAN and Bluetooth systems that are operating at short range. This means the basic service areas overlap with each other. Significant performance degradation was observed when operating both WLAN and Bluetooth systems simultaneously.(2) We presented a new realistic multi-layer cell architecture for distributed control, in which there could be one or more cell layer types. The cell size for each cell layer type was fixedly selected according to cell radius in the cellular structure. We also presented an efficient analysis to evaluate the performance of such mobile cellular wireless systems by using ARP method.(3) We suggested a new method using recursive search algorithm based on a 7 cells repetition. In this assignment method, it takes shorter time to find an optimal or a semi-optimal channel assignment than in other methods, which satisfies minimum adjacent interference. … More We also showed that the method is valid. We then applied the technique to several different channel assignment environments. We also presented the difficulties encountered in this method and further improvements.(4) We presented an analysis method for an integrated voice and data wireless LAN with non-persistent carrier sense multiple access with collision avoidance (CSMA/CA) protocol to exactly derive the moment generating function of the packet interdeparture time for the output process. Numerical examples included comparisons between the single and multiple traffic system models in term as the coefficient of variation of packet interdeparture time by differentiating the moment generating functions.(5) We investigated an optimal replacement problem of a system in a semi-Markov environment. A special case of Markov environment was discussed, and the state space could be simplified equivalently to be finite, so the real computation of the problem is feasible. Finally, a numerical example was given to prove the correctness and validity of the analysis.(6) We investigated the properties of the optimality equation and optimal policies in discrete time Markov decision processes with expected discounted total rewards under the weak conditions that the model is well defined and the optimality equation is true.(7) We considered two types of interference conditions for channel assignment : a co-channel interference within distance of two cells and a adjacent channel interference within the same and the adjacent cells. We presented our recursive search algorithm together with the neighborhood improvement structure. Then we minimized or disallowed these two types of interference in order to achieve optimal channel assignment. Less

在本研究中：（1）我们首先评估了蓝牙的性能。接下来，我们评估了在短距离下工作的WLAN和蓝牙系统的特性。这意味着基本服务领域相互重叠。当同时操作WLAN和蓝牙系统时，观察到显著的性能下降。(2)提出了一种新的分布式控制的多层单元结构，其中可以有一个或多个单元层类型。每种细胞层类型的细胞尺寸根据细胞结构中的细胞半径固定地选择。我们还提出了一个有效的分析，以评估这种移动的蜂窝无线系统的性能，通过使用阿普方法。(3)我们提出了一种新的方法，使用递归搜索算法的基础上的7个细胞的重复。在这种分配方法中，它需要更短的时间来找到一个最佳或半最佳的信道分配比在其他方法，满足最小相邻干扰。 ...更多信息 我们还证明了该方法的有效性。然后，我们将该技术应用到几个不同的信道分配环境。同时也提出了该方法中遇到的困难和进一步的改进。(4)针对采用非持续载波侦听多路访问冲突避免（CSMA/CA）协议的语音数据一体化无线局域网，提出了一种分析方法，精确推导出输出过程中数据包间隔时间的矩母函数。数值算例包括比较单一和多个交通系统模型的分组间隔时间的变异系数，通过微分的矩母函数。(5)研究了半马尔可夫环境下系统的最优替换问题。讨论了马尔可夫环境的一种特殊情况，将状态空间等价地简化为有限状态空间，从而使问题的真实的计算是可行的。最后通过算例验证了分析的正确性和有效性。(6)在模型定义良好且最优性方程成立的较弱条件下，研究了具有期望折扣总报酬的离散时间Markov决策过程的最优性方程和最优策略的性质. (7)我们考虑了两种类型的信道分配的干扰条件：两个小区的距离内的同信道干扰和同一和相邻小区内的相邻信道干扰。我们提出了我们的递归搜索算法与邻域改进结构。然后，我们最小化或不允许这两种类型的干扰，以实现最佳的信道分配。少

项目成果

W.Yue, K.Hatogai, et al.: "Performance Evaluation of Traffic in a Interfering Wireless LANs Environment for Bluetooth and IEEE 802.11"Proc. of the Third IEEE Workshop on Wireless LANs. S8-3-1-S8-3-8 (2001)

W.Yue、K.Hatogai 等人：“蓝牙和 IEEE 802.11 干扰无线 LAN 环境中流量的性能评估”Proc。

岳 五一, 馬越 康弘, 鳩貝 耕一: "マルチメディアキャンパス分散教育環境における負荷に関する統計解析"パソコンリテラシ(技術報告). 27・9. 36-42 (2002)

Goichi Gaku、Yasuhiro Umakoshi、Koichi Hatogai：“多媒体校园分布式教育环境中的负载统计分析”计算机素养（技术报告）27・9（2002）。

W.Yue, Qiying Hu: "Properties of the Optimality Equation and Optimal Policies in Discrete Time Markov Decision Processes"電子情報通信学会信学技報. CST2002. 7-12 (2002)

W.Yue、Qiying Hu：“离散时间马尔可夫决策过程中的最优方程和最优策略的性质” IEICE 技术报告 7-12 (2002)。

W.Yue, K.Miyazaki, et al.: "Optimal Channel Assignment in Wireless Communication Networks with Both of Distance and Frequency Interferences"Proc. of the 10th International Conference on Telecommunication (ICT'2003). Wireless (II). 1-8 (2003)

W.Yue、K.Miyazaki 等人：“具有距离和频率干扰的无线通信网络中的最优信道分配”Proc。

鳩貝 耕一, 岳 五一: "IEEE802.11bとBluetoothとの通信干渉時における性能評価"パーソナルコンピュータユーザ利用技術協会論文誌. 12・1. 45-52 (2002)

Koichi Hatogai、Goichi Gaku：“IEEE802.11b 和蓝牙之间的通信干扰时的性能评估”个人计算机用户使用技术协会杂志 12・1（2002 年）。