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Downlink Throughput Enhancement of a Cellular Network using Two-Hop User-Deployable Indoor Relays

机译:使用两跳用户可部署室内中继的蜂窝网络的下行链路吞吐量增强

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In this paper, we propose two-hop user-deployable indoor relays for CDMA systems with signal bandwidth 5 MHz or less. We assume concurrent relaying wherein macro base stations (BS) are allowed to transmit when a relay is forwarding. The two-hop indoor relay is studied using a generalized model for outdoor-to-indoor communication in a frequency-selective channel in the presence of co-channel interference. We propose an equalize-and-forward relay that employs multiple-antenna interference-aware equalization before forwarding. We present a unified solution to minimize interference (due to concurrent transmissions) at the relay-served destination and the BS-served destination, using power control and exploiting spatial reuse. A systematic method to enable indoor relays with the proposed interference management solutions is presented that is applicable to existing CDMA systems, without additional requirements in Access Terminal (AT)/User Equipment. Simulation results in the context of High Rate Packet Data (HRPD) CDMA network shows that the ATs served through the indoor relays experience throughput improvement by at least a factor of two, whereas the ATs served by the BS experienced a gain of around 6% in spite of concurrent relaying. The results also show an overall system throughput gain upto 30% when compared to the existing network with only single hops.
机译:在本文中,我们为信号带宽为5 MHz或以下的CDMA系统提出了两跳用户可部署的室内继电器。我们假设并发中继,其中在中继转发时允许宏基站(BS)发送。在存在同频干扰的情况下,使用用于频率选择信道中室外到室内通信的通用模型研究了两跳室内中继。我们提出了一种均衡转发中继,在转发之前采用了多天线感知干扰的均衡。我们提出了一种统一的解决方案,可使用功率控制并利用空间复用来最大程度地减少中继服务目的地和BS服务目的地的干扰(由于并发传输)。提出了一种使用建议的干扰管理解决方案使室内中继成为可能的系统方法,该方法适用于现有的CDMA系统,而对接入终端(AT)/用户设备没有附加要求。在高速率分组数据(HRPD)CDMA网络中的仿真结果表明,通过室内中继服务的AT的吞吐量至少提高了两倍,而BS服务的AT在2006年的增益提高了约6%。尽管并发中继。结果还显示,与仅具有单跳的现有网络相比,整个系统的吞吐量提高了30%。

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