於LTE微小型基地台網路之QoS感知功率控制與資源分配研究
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2014
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Abstract
HeNB（Home Evolved Node B）也可被稱作微小型基地台（femtocell）將在未來長期演進技術（Long Term Evolution，LTE）網路中盛行，這是因為室內用戶數量達到一定程度，它的容量經由頻率複用（frequency reuse）技術得以解決頻譜不足的問題。在本論文中，我們處理微小型基地台干擾問題並且提出干擾控制方法，以它的麻煩節點（troubling node）和服務節點（servicing node）特性為基礎，所提出方法能動態性調整微小型基地台的傳輸功率，這是為了平衡對用戶服務品質（Quality of Service，QoS）以及避免對周圍微小型基地台干擾。我們與其他方法進行模擬比較，結果顯示我們方法能有效避免周圍微小型基地台之間干擾，並改善微小型基地台網路的速率，而且在與其他方法比較之下同時保有用戶感知服務品質。
Home Evolved Node B (HeNB), also called Femtocell will prevail in the future Long Term Evolution (LTE) networks because of certain large amounts of indoor users and its capability to solve the problem of spectrum insufficiency by frequency reuse. In this paper, we tackled the interference problems in Femtocell networks and present an interference control scheme. The proposed scheme dynamically adjusts the transmission power of HeNB based on its “troubling” property and “servicing” property so as to balance the provisioning of Quality of Service (QoS) for users and the avoidance of interference to neighboring HeNBs. We conducted simulations to compare the performance of our proposed scheme with that of other approaches. The results illustrate that our approach can effectively avoid interferences between neighboring HeNBs to improve the aggregate throughput of femtocell networks, and simultaneously maintain the user-perceived QoS in comparison with other schemes, so as to advance the overall LTE spectrum efficiency.
Home Evolved Node B (HeNB), also called Femtocell will prevail in the future Long Term Evolution (LTE) networks because of certain large amounts of indoor users and its capability to solve the problem of spectrum insufficiency by frequency reuse. In this paper, we tackled the interference problems in Femtocell networks and present an interference control scheme. The proposed scheme dynamically adjusts the transmission power of HeNB based on its “troubling” property and “servicing” property so as to balance the provisioning of Quality of Service (QoS) for users and the avoidance of interference to neighboring HeNBs. We conducted simulations to compare the performance of our proposed scheme with that of other approaches. The results illustrate that our approach can effectively avoid interferences between neighboring HeNBs to improve the aggregate throughput of femtocell networks, and simultaneously maintain the user-perceived QoS in comparison with other schemes, so as to advance the overall LTE spectrum efficiency.
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長期演進技術, 微小型基地台, 干擾減少, 功率控制, 3GPP Long Term Evolution (LTE), Femtocell, interference mitigation, power control