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首页> 外文会议>2011 IEEE 3rd International Conference on Communication Software and Networks >Device-to-Device communication in CDMA-based cellular systems — Uplink capacity analysis
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Device-to-Device communication in CDMA-based cellular systems — Uplink capacity analysis

机译：基于CDMA的蜂窝系统中的设备到设备通信—上行链路容量分析

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We study the uplink capacity gain when Device-to-Device (D2D) links are enabled in a FDD CDMA-based cellular system. In such a system, a direct link for data traffic is established if a communication pair is closely located, and better link quality is expected due to the short D2D transmission distance. We consider a single cell scenario, and assume uplink resource is utilized by D2D communications. We assume the D2D transmitter transmits at a power level no more than it transmits in a cellular mode; in this case no extra interference would be introduced into the CDMA system. Optimal transmit power for benefited D2D links is derived to improve system performance in terms of uplink capacity. Extensive simulations are conducted, which demonstrate that a significant capacity gain is obtained from D2D links. Subsequently, we discuss the performance gain and its affecting factors and try to derive some insights on practical implementation.
机译：我们研究了在基于FDD CDMA的蜂窝系统中启用设备到设备（D2D）链接时的上行链路容量增益。在这样的系统中，如果通信对位于近处，则建立用于数据业务的直接链路，并且由于较短的D2D传输距离而期望更好的链路质量。我们考虑单小区场景，并假设D2D通信使用了上行链路资源。我们假设D2D发射机的功率电平不超过蜂窝模式下的功率电平。在这种情况下，不会在CDMA系统中引入额外的干扰。推导了有益的D2D链路的最佳发射功率，以提高上行链路容量方面的系统性能。进行了广泛的仿真，这表明从D2D链接获得了显着的容量增益。随后，我们讨论了性能提升及其影响因素，并试图从实践中得出一些见解。

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