Plets D, Joseph W, Vanhecke K, Vermeeren G, Wiart J, Aerts S, Varsier N, Martens L
Information Technology Department, Ghent University/iMinds, Gaston Crommenlaan 8, 9050 Ghent, Belgium.
Orange Labs Networks and Carriers, 38-40 rue Général Leclerc, 92794 Issy Les Moulineaux, France.
Biomed Res Int. 2015;2015:943415. doi: 10.1155/2015/943415. Epub 2015 Feb 22.
The total whole-body exposure dose in indoor wireless networks is minimized. For the first time, indoor wireless networks are designed and simulated for a minimal exposure dose, where both uplink and downlink are considered. The impact of the minimization is numerically assessed for four scenarios: two WiFi configurations with different throughputs, a Universal Mobile Telecommunications System (UMTS) configuration for phone call traffic, and a Long-Term Evolution (LTE) configuration with a high data rate. Also, the influence of the uplink usage on the total absorbed dose is characterized. Downlink dose reductions of at least 75% are observed when adding more base stations with a lower transmit power. Total dose reductions decrease with increasing uplink usage for WiFi due to the lack of uplink power control but are maintained for LTE and UMTS. Uplink doses become dominant over downlink doses for usages of only a few seconds for WiFi. For UMTS and LTE, an almost continuous uplink usage is required to have a significant effect on the total dose, thanks to the power control mechanism.
室内无线网络中的全身总暴露剂量被最小化。首次针对最小暴露剂量设计并模拟了室内无线网络，其中同时考虑了上行链路和下行链路。针对四种场景对最小化的影响进行了数值评估：两种具有不同吞吐量的WiFi配置、一种用于语音通话流量的通用移动通信系统（UMTS）配置以及一种具有高数据速率的长期演进（LTE）配置。此外，还对上行链路使用对总吸收剂量的影响进行了表征。当添加更多发射功率较低的基站时，观察到下行链路剂量至少降低75%。由于缺乏上行链路功率控制，WiFi的总剂量降低随着上行链路使用的增加而减少，但LTE和UMTS的总剂量降低得以维持。对于WiFi，仅使用几秒钟时，上行链路剂量就会超过下行链路剂量。对于UMTS和LTE，由于功率控制机制，几乎需要连续使用上行链路才能对总剂量产生显著影响。
