Performance Analysis of Radio Resource Allocation in Next Generation Mobile Network

• Main Authors: Kai-Hsing Chang, 張改興
• Other Authors: Wei-Yeh Chen
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/19411242286231309200

碩士 === 南台科技大學 === 資訊管理系 === 97 === As the broadband network technology evolves and the number of mobile subscriber increases tremendously, the traditional voice service can't fulfill the mobile user’s demand. Therefore, how to effectively allocate scare radio resource for various services will be an important issue in the next generation mobile networks. In this paper, the performance of radio resource allocation for integrated voice and data services was first analyzed based on a two-dimensional Markov chain. To investigate the impact of bursty nature of data traffic on system performance, we use a simple ON/OFF model to model the data traffic. The performance of radio resource allocation was then analyzed based on a three-dimensional Markov chain. To guarantee the QoS of voice service not being affected by the introduction of data packets, preemptive priority is applied for voice calls to preempt network data packets. Three cases of radio resource allocation are considered: no-buffer; buffer-only-for-preempted-data-packets; and buffer-for-data-packets. The results show that employing buffer for network packets can greatly reduce its blocking probability even under the condition of voice preemption. For real-time data applications, the mechanism of buffer-only-for-preempted-network-packets will be suitable since the queuing delay is relatively small. The results also showed that the bursty nature of MMPP traffic has negative impact on system performance.