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首页> 外文期刊>電子情報通信学会技術研究報告. 無線通信システム. Radio Communication Systems >Experiments on Reservation-Based Packet Transmission in Reverse Link CDMA Broadband Wireless Access Controlling Transmission-Power of Data Packet According to QoS Requirements
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Experiments on Reservation-Based Packet Transmission in Reverse Link CDMA Broadband Wireless Access Controlling Transmission-Power of Data Packet According to QoS Requirements

机译：基于QoS要求的反向链路CDMA宽带无线访问控制中基于预留的分组传输的实验

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摘要

This paper proposed an efficient reservation-based packet transmission method, which adaptively controls the transmission-power offset Δ{sub}(offset) and the power ratio of pilot channel to data channel according to the Quality of Service (QoS) requirements transmitted by reservation packet and experimentally presents packet error rate (PER) performance in the reverse link for CDMA broadband wireless access. Experimental results using the CDMA transceiver with a 40-MHz bandwidth in the reverse link elucidated that whenΔ{sub}(offset), is set to -2 dB, the total required average received signal energy per bit-to-background noise power spectrum density ratio (E{sub}b/N{sub}0) for satisfying error-free reception assuming non-real time traffic data was reduced by approximately 3 dB by applying Chase combining to the data packet compared to that with a constantΔ{sub}(offset) without retransmission in a four-path Rayleigh fading channel with the fading maximum Doppler frequency of 20 Hz. Furthermore, it was confirmed that in real time traffic data, for which the delay requirement was rigid, the required average residual packet error rate was achieved by controllingΔ{sub}(offset), according to the maximum allowable number of retransmissions, i.e., a few, within the delay requirement of each traffic data type.
机译：本文提出了一种有效的基于预留的分组传输方法，该方法根据预留发送的服务质量（QoS）要求，自适应地控制传输功率偏移量Δ{sub}（offset）和导频信道与数据信道的功率比。分组，并通过实验展示了反向链路中CDMA宽带无线接入的分组错误率（PER）性能。在反向链路中使用具有40 MHz带宽的CDMA收发器的实验结果表明，当Δ{sub}（偏移）设置为-2 dB时，每位至背景噪声功率谱密度所需的平均平均接收信号总能量假设通过将Chase组合应用于数据包，与具有恒定Δ{sub}的数据包相比，将非实时流量数据减少了约3 dB，则满足无差错接收的比率（E {sub} b / N {sub} 0） （偏移），而不在最大多普勒频率为20 Hz的四径瑞利衰落信道中重发。此外，已经证实，在对延迟要求严格的实时业务数据中，根据最大允许重发次数（即，a），通过控制Δ{sub}（偏移）来实现所需的平均残余分组错误率。每种流量数据类型的延迟要求之内的数量很少。

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