SELF-OPTIMIZING DEPLOYMENT CASCADE CONTROL SCHEME AND DEVICE BASED ON TDMA FOR INDOOR SMALL CELL IN INTERFERENCE ENVIRONMENTS

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

15/214,544

專利證號

US 10,055,682 B2

專利獲證名稱

SELF-OPTIMIZING DEPLOYMENT CASCADE CONTROL SCHEME AND DEVICE BASED ON TDMA FOR INDOOR SMALL CELL IN INTERFERENCE ENVIRONMENTS

專利所屬機關 (申請機關)

元智大學

獲證日期

2018/08/21

技術說明

本發明揭示一個建構於分時多工接取(time division multiplexing, TDMA)多用戶資源分配之適應性網路模糊推論系統(adaptive network-based fuzzy inference system, ANFIS)室內小細胞基地台自我優化佈署串接控制(self-optimizing deployment cascade control, SODCC)方法與裝置，使一個室內小細胞可滿足多用戶(multi-user, MU)服務可靠度、最佳化通達率、與細胞半徑需求，並可因應干擾環境變化自我優化發射最小功率，達到容易安裝操作、節省能源、並避免對室外其他用戶造成干擾之目的。自我優化佈署控制裝置包含初始發射功率配置器(IPSC)(ANFIS控制器#1)、最佳化通道品質指標(channel quality index , CQI)決策器(CQIDC)(ANFIS控制器#2)與自我優化功率控制器(SOPC)(ANFIS控制器#3)三個單元與自我優化功率控制保護機制控制器，由用戶設備端(user equipment, UE)輸入服務可靠度、室內涵蓋半徑與細胞邊緣通達率設定，在多用戶干擾環境中自我優化室內小細胞基地佈署。室內小細胞基地自我優化佈署控制裝置藉由用戶設備端(user equipment, UE)回傳之資訊，估測傳接機間路徑損(path loss, PL)與傳接機訊干雜比(signal-to-interference-plus- noise ratio, SINR)，適應性控制正交分頻多工(orthogonal frequency division multiplexing, OFDM)傳接機的發射功率，使室內小細胞基地台的用戶可自我優化產生滿足多用戶服務可靠度設定與接收機區塊錯誤率(blocking error rate, BLER)小於10-1、最佳化通達率、最小發射功率與干擾的傳接機性能。 實驗結果顯示應用本發明於室內小細胞基地台部署時，可使室內小細胞基地台具備高服務可靠度、低功率消耗與對鄰近細胞用戶產生低同頻干擾功率之優點。 Based on time division multiplexing access (TDMA) resource assignment, an adaptive neural fuzzy inference system (ANFIS) based self-optimizing deployment cascade control (SODCC) device is presented for indoor small cell to enable easy installation, multi-user (MU) service reliability, optimum throughput, power saving, minimum interference and good cell coverage. The proposed SODCC device is designed with a cascade architecture, which mainly contains an ANFIS based initial power setting controller (IPSC) in the first unit, an ANFIS based channel quality index (CQI) decision controller (CQIDC) in the second unit and an ANFIS based self-optimizing power controller (SOPC) in the third unit. In addition, a self-optimizing power controller protection mechanism is included in the SODCC device to prevent the co-channel interference from the moving user of adjacent cells. The user inputs the parameters including the service reliability, coverage radius and the throughput at the cell edge.

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