两跳中继OFDMA蜂窝网络下行链路呼叫阻塞率分析

doi:10.3969/j.issn.0372-2112.2016.02.014

电子学报 ›› 2016, Vol. 44 ›› Issue (2): 340-347.DOI: 10.3969/j.issn.0372-2112.2016.02.014

两跳中继OFDMA蜂窝网络下行链路呼叫阻塞率分析

鲁蔚锋^1,2,3, 杨绿溪¹, 吴蒙³

1. 东南大学信息与工程学院, 江苏南京 210096;
2. 南京邮电大学计算机学院, 江苏南京210023;
3. 南京邮电大学宽带无线通信与传感网技术教育部重点实验室, 江苏南京 210023

收稿日期:2014-09-16 修回日期:2014-11-11 出版日期:2016-02-25
- 作者简介:
- 鲁蔚锋 男,1979年生于安徽马鞍山.东南大学信息与工程学院博士后,南京邮电大学计算机学院副教授,研究方向为无线通信与信息安全.E-mail:luwf@njupt.edu.cn;杨绿溪 男,1964年生安徽桐城,东南大学信息与工程学院教授,研究方向为通信信号处理、MIMO通信系统设计、协作通信与分集处理.
- 基金资助:
- 国家自然科学基金 (No.61372101,No.61201176,No.61271018,No.61201160); 国家科技重大专项 (No.2012ZX03004-005-003); 教育部博士点基金 (No.20100092110010); 江苏省科技计划 (No.BK20131377); 江苏省高校优秀中青年教师和校长境外研修计划

Analysis of Call Blocking Probability in Downlink of Two-Hop-Relay OFDMA Cellular Networks

LU Wei-feng^1,2,3, YANG Lü-xi¹, WU Meng³

1. School of Information Science and Engineering, Southeast University, Nanjing, Jiangsu 210096, China;
2. College of Computer, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China;
3. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing, Jiangsu 210023, China

Received:2014-09-16 Revised:2014-11-11 Online:2016-02-25 Published:2016-02-25
- Supported by:
- National Natural Science Foundation of China (No.61372101, No.61201176, No.61271018, No.61201160); National Science and Technology Major Project of the Ministry of Science and Technology (No.2012ZX03004-005-003); Ph.D. Programs Foundation of Ministry of Education of China (No.20100092110010); Jiangsu Science and Technology Program (No.BK20131377); Overseas Study Program for Outstanding Young and Middle-aged Teachers and Principals in Colleges and Universities of Jiangsu Province

摘要/Abstract

摘要：

本文首先提出了一种分析OFDMA蜂窝网络下行链路呼叫阻塞率的方法,在此基础上进一步分析了加入两跳中继的OFDMA蜂窝网络呼叫阻塞率.OFDMA蜂窝网络的每个呼叫接入都需要随机数量的子载波来满足用户传输速率的需求,传统GSM及CDMA网络的容量分析方法不能应用到OFDMA网络系统中.本文根据用户对子载波的需求量,把接入用户分成不同的服务类型,以多维马尔可夫链为数学模型分别分析传统和两跳中继OFDMA蜂窝网络下行链路呼叫阻塞率,最终通过数值计算分析各种参数对系统性能的影响,数值分析结果表明加入中继后的两跳中继OFDMA蜂窝网络下行链路容量比传统网络有显著的提升.

关键词: 正交频分多址接入, 两跳中继, 下行链路, 呼叫阻塞率, 马尔可夫链

Abstract:

In this paper, a novel approach is presented to evaluate the call blocking probability in downlink of cellular Orthogonal Frequency Division Multiple Access (OFDMA) networks.Based on this analysis, call blocking probability in downlink of two-hop-relay OFDMA cellular networks is evaluated.Capacity analysis of traditional cellular networks like GSM and CDMA cellular networks cannot be applied to OFDMA cellular networks because for the latter every incoming call requires a random number of sub-carriers.In this paper, incoming calls are divided into classes according to their requirement for sub-carrier.Then, the traditional and relay OFDMA cellular network are modeled as the multi-dimensional Markov chain and their call blocking probability in downlink are evaluated.Finally, through numerical calculation, the impact of the various parameters on the performance is analyzed.This analysis shows that the capacity of OFDMA cellular networks which added relays has been greatly improved.

Key words: orthogonal frequency-division multiple access(OFDMA), two-hop-relay, downlink, call blocking probability, Markov chains

中图分类号:

TN929.5

. 两跳中继OFDMA蜂窝网络下行链路呼叫阻塞率分析[J]. 电子学报, 2016, 44(2): 340-347.

. Analysis of Call Blocking Probability in Downlink of Two-Hop-Relay OFDMA Cellular Networks[J]. Acta Electronica Sinica, 2016, 44(2): 340-347.

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两跳中继OFDMA蜂窝网络下行链路呼叫阻塞率分析

Analysis of Call Blocking Probability in Downlink of Two-Hop-Relay OFDMA Cellular Networks

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