ACCESS POINT APPARATUS AND PROCESSING APPARATUS IN COMMUNICATION WITH WIRELESS DEVICE VIA MULTIPLE ACCESS POINT APPARATUSES

• Main Authors: OZEKI TAKEO, SUGANO KAZUMASA, AMANO YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 05.04.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; WIRELESS COMMUNICATIONS NETWORKS

To estimate downlink channel characteristics in distributed CFmMIMO.SOLUTION: A processing apparatus includes: acquisition means for acquiring, from a plurality of AP apparatuses, first characteristic information indicating uplink channel characteristics estimated based on reference signals received by each of the plurality of AP apparatuses from a wireless device; control means for performing a correction process to generate correction information based on a reference AP apparatus by scheduling the transmission and reception of test signals by each of the plurality of AP apparatuses and obtaining, from the plurality of AP apparatuses, second characteristic information indicating channel characteristics among the AP apparatuses estimated based on the test signals received by each of the plurality of AP apparatuses from other AP apparatuses; estimation means for estimating third characteristic information indicating downlink channel characteristics based on the first characteristic information and the correction information; and transmission means for transmitting to each of the plurality of AP apparatuses information for precoding transmission signals to be transmitted by the plurality of AP apparatuses to the wireless device based on the third characteristic information.SELECTED DRAWING: Figure 4 【課題】分散型のＣＦｍＭＩＭＯにおいて下りリンクのチャネル特性を推定する。【解決手段】処理装置は、複数のＡＰ装置それぞれが無線デバイスから受信した参照信号に基づき推定した上りリンクのチャネル特性を示す第１特性情報を複数のＡＰ装置から取得する取得手段と、複数のＡＰ装置のそれぞれによる試験信号の送受信をスケジューリングし、複数のＡＰ装置のそれぞれが他のＡＰ装置から受信した試験信号に基づき推定したＡＰ装置間のチャネル特性を示す第２特性情報を複数のＡＰ装置から取得して基準ＡＰ装置を基準とした補正情報を生成する補正処理を行う制御手段と、第１特性情報と補正情報とに基づき、下りリンクのチャネル特性を示す第３特性情報を推定する推定手段と、第３特性情報に基づき複数のＡＰ装置が無線デバイスに送信する送信信号のプリコーディングを行うための情報を複数のＡＰ装置それぞれに送信する送信手段と、を備えている。【選択図】図４