[1] Shao Jianhua, Yin Kuixi, Zhao Hua,. Analysis of throughput and stability for ACK-ALOHA-CDMA channel [J]. Journal of Southeast University (English Edition), 2009, 25 (2): 156-160. [doi:10.3969/j.issn.1003-7985.2009.02.003]
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Analysis of throughput and stability for ACK-ALOHA-CDMA channel(
)
应答式ALOHA-CDMA信道的吞吐量及稳定性分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 25
- Issue:
- 2009 2
- Page:
- 156-160
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2009-06-30
Info
- Title:
- Analysis of throughput and stability for ACK-ALOHA-CDMA channel
- 应答式ALOHA-CDMA信道的吞吐量及稳定性分析
- Author(s):
- Shao Jianhua, Yin Kuixi, Zhao Hua
- Optoelectronics Key Laboratory of Jiangsu Province, Nanjing Normal University, Nanjing 210097, China
- Keywords:
- throughput; stability; ACK-ALOHA-CDMA
- PACS:
- TN914.5
- DOI:
- 10.3969/j.issn.1003-7985.2009.02.003
- Abstract:
- A new acknowledgment-type slotted-ALOHA code division multiple access(ACK-ALOHA-CDMA)channel which can be used in the inbound channels of very small aperture terminal(VSAT)networks is proposed in order to simplify the synchronization equipment of networks in the slotted-ALOHA-CDMA systems.By dividing all VSAT stations into M subsystems and sending out periodic inquiry signals from the Hub station to the VSAT station, the channel model is established.By the means of deriving multi-access interference(MAI)and packet detecting probability, steady-state throughput is calculated.By applying diffusion process theory to the analysis of the stability of the ACK-ALOHA-CDMA channel, the drift parameter a(r), the diffusion parameter b(r)and the steady transition probability density p(r)are investigated.Simulation results indicate that significant performance improvement and high-bandwidth efficiency can be gained and one or two steady equilibrium points can be obtained by using this channel.Consequently, the ACK-ALOHA-CDMA channel is very suitable for cutting down on the expense of satellite VSAT systems and distributed packet radio networks.
- 为了简化时隙ALOHA-CDMA系统的时间同步设备, 提出了一种可用于卫星VSAT网络内向信道的应答式时隙ALOHA-CDMA信道模型.将端站分为M个子系统, 利用主站发出周期性询问信号, 建立了信道模型;通过扩频多址干扰(MAI)和分组检测概率的推导, 计算出该信道的稳态吞吐量;并将扩散过程理论用于该信道的稳定性分析, 得到扩散系数a(r)、漂移系数b(r)和信道平稳分布p(r).仿真结果表明, 该系统可以显著提高信道吞吐性能和信道利用率, 且存在1~2个稳定平衡点.应答式时隙ALOHA-CDMA信道可以降低卫星VSAT系统及分组无线网络系统的组网成本.
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[9] Shao Jianhua, Yin Kuixi, Wang Xinghe, et al.Detecting probability and throughput of VSAT systems based on ACK-ALOHA-CDMA channel[C]//Proc of the IEEE 2008 International Conference on Wireless Communications, Networking and Mobile Computing.Piscataway:IEEE Press, 2008:108-112.
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Memo
- Memo:
-
Biography: Shao Jianhua(1964—), male, associate professor, shaojianhua@njnu.edu.cn.
Foundation items: The Key Laboratory Foundation of Geographical Information Science of Jiangsu Province(No.JK20050304), the Key Laboratory Foundation of Virtual Geographical Environments of Ministry of Education(No.NS206005).
Citation: Shao Jianhua, Yin Kuixi, Zhao Hua.Analysis of throughput and stability for ACK-ALOHA-CDMA channel[J].Journal of Southeast University(English Edition), 2009, 25(2):156-160.