The Technologies and Studies for New Generation of Wireless Communication

• Main Authors: Chi-Yan Jea, 賈直諺
• Other Authors: Ying-Hong Wang
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/25055990299441897810

碩士 === 淡江大學 === 資訊工程學系 === 89 === With the mobile communication techniques development, it provided us a more convenient life. The mobile communication techniques make that people can talk with each other any time and anywhere, and reduce distance between people and people further. The System also progresses from the first generation to the second generation, it solves the problem of the capability and the security, and it strengthens the QoS of the user. It brings the flourishing chance and profit for the telecommunications. Before the second generation communication system, all of the telecom are focus on voice and let voice be the main service item. Short message and E-mail are the added services. But in third generation wireless communication system, 80% of service is the mobile multimedia transfer, 20% is the common voice call. It provides users Mobile Internet service to access the rich resources that maybe include real time and non real time data content in the network. Therefore, require rate is must be increase. We must improve the techniques in the past and present new solution. Based on this requirement, this paper will introduce what is the new generation wireless communication system and discuss some important technique issues about this, for example, mobile IP, cellular IP, Multi-tire, and etc. Then, this paper will present the dynamic rate assign algorithm that not only conform the norm in IMT-2000 but also is based on Multi-time slot and Multi-Code technique. The algorithm investigates how the base station dynamically adjusts the transfer rate that the user used according to the traffic load at the time and the type of the transfer rate in the transfer process. It let system access the limited resource efficiently.