A study of packet mobile communication system using code division multiple access

码分多址分组移动通信系统的研究

• 批准号: 07455160
• 负责人: OGAWA Akira
• 金额: $ 2.82万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455160/
• 关键词: Code Division Multiple Access; Packet Radio System; Access Control; Throughput Analysis; Cellular Environment; 無線パケット通信; ラルラ環境; スプレッドアロハ方式; スループット特性; 不均一なトラフィック負荷分布; 送信許可制御法

In this study, we have examine the packet radio communication system using code division multiple access aiming for the purpose of developing the highly efficient and convenient that is suitable for mobile radio communication systems. The obtained results are listed as the following.(1) We have analyzed the throughput and delay performance for CDMA Unslotted ALOHA system.(2) We have obtained the throughput and delay performance for CDMA Unslotted ALOHA system in consideration of packet re-transmission.(3) We have proposed and analyzed the OACP,which controls both packet transmission and packet re-transmission.(4) We have examined the effect of the access timing delay on CDMA ALOHA with CLSP.(5) We have proposed and analyzed the new protocol, that can mitigate the effect of the access timing delay. It has been shown that our proposed protocol, called MCLSP,is robust to the access timing delay. Therefore, it is suitable for satellite system where the system often suffers from a long access timing delay.(6) We have analyzed the throughput of CDMA ALOHA in cellular mobile environment.The above study results have published in the various papers and have presented in international conferences, where they have been accepted as a talented and valuable study.

在本研究中，我们以开发适用于移动的无线通信系统的高效和方便为目的，研究了使用码分多址的分组无线通信系统。所得结果如下。(1)分析了CDMA非时隙ALOHA系统的吞吐量和时延性能。(2)我们得到了考虑分组重传的CDMA非时隙ALOHA系统的吞吐量和时延性能。(3)我们已经提出并分析了OACP，它控制数据包传输和数据包重传。(4)我们研究了接入时延对CLSP CDMA ALOHA的影响。(5)我们提出并分析了新的协议，可以减轻访问定时延迟的影响。它已被证明，我们提出的协议，称为MCLSP，是强大的访问定时延迟。因此，它适用于卫星系统中，系统往往遭受一个长的接入定时延迟。(6)我们分析了CDMA ALOHA在蜂窝移动的环境中的吞吐量，上述研究结果已发表在各种论文中，并在国际会议上发表，在那里他们已被接受为一个有才华的和有价值的研究。

项目成果

M. Saito: "Throughput Improvement on CDMA Slotted ALOHA System by Modified Channel Load Sensing Protocol" PIMRC '96. 103-107 (1996)

M. Saito：“通过修改的信道负载传感协议提高 CDMA 时隙 ALOHA 系统的吞吐量”PIMRC 96。

H.Okada: "CDMA ALOHA Systems with Modified Channel Load Sensing Protocol for Satellite Communications" IEICE Transactions. E79-A. 2035-2042 (1996)

H.Okada：“具有用于卫星通信的改进信道负载传感协议的 CDMA ALOHA 系统”IEICE Transactions。

H.Okada: "A Novel Access Control Method for CDMA Unslotted ALOHA Systems" Proc.of MDMC'96. 391-395 (1996)

H.Okada：“CDMA 无时隙 ALOHA 系统的新颖访问控制方法”Proc.of MDMC96。

西田邦生: "遠近問題とフェージングを考慮したCDMA ALOHA方式のスループット特性についての一考察" 1996年電子情報通信学会総合大会. vol.SA-5-4. 472-472 (1996)

Kunio Nishida：“考虑远近问题和衰落的 CDMA ALOHA 系统吞吐量特性的研究”1996 年 IEICE 大会第 SA-5-4 (1996)。

M. Saito: "Throughput Improvement on CDMA Slotted ALOHA System" 電子情報通信学会論文誌(E). E80-B. 74-80 (1997)

M. Saito：“CDMA 时隙 ALOHA 系统的吞吐量改进”电子、信息和通信工程师学会会刊 (E) 74-80 (1997)。