METHOD AND APPARATUS FOR CALIBRATION OF CHANNEL RECIPROCITY IN WIRELESS COMMUNICATION SYSTEM

The present invention relates to a method and apparatus for calibrating channel reciprocity in a wireless communication system to easily perform calibration to secure or guarantee uplink/downlink channel reciprocity. According to one embodiment of the present invention, a channel reciprocity calibra...

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Hauptverfasser: LEE JIN, YU CHANG WAHN, NA JEE HYEON, KIM NAM I, LEE YU RO, HONG SEUNG EUN
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creator LEE JIN
YU CHANG WAHN
NA JEE HYEON
KIM NAM I
LEE YU RO
HONG SEUNG EUN
description The present invention relates to a method and apparatus for calibrating channel reciprocity in a wireless communication system to easily perform calibration to secure or guarantee uplink/downlink channel reciprocity. According to one embodiment of the present invention, a channel reciprocity calibration method performed by a control node of a communication system comprises the following steps of: receiving channel measurement result information from a plurality of APs connected to a control node through a fronthaul; selecting one reference AP based on the information of the received channel measurement result; receiving, from the reference AP, information on a reference calibration coefficient for calibrating channel reciprocity for a channel with a UE; calculating a relative calibration coefficient for calibrating channel reciprocity with respect to a channel with the UE of each of the APs except for the reference AP among the plurality of APs on the basis of reference calibration coefficient information; and transmitting information on the calculated relative calibration coefficient to each of the APs except for the reference AP. 본 발명의 일 실시예에 따른 통신 시스템의 제어 노드에 의해 수행되는 채널 상호성 보정 방법은, 상기 제어 노드와 프론트홀로 연결된 복수의 AP들로부터, 채널 측정 결과의 정보를 수신하는 단계, 상기 수신된 채널 측정 결과의 정보에 기초하여, 하나의 기준 AP를 선택하는 단계, 상기 기준 AP로부터, UE와의 채널에 대한 채널 상호성의 보정을 위한 기준 보정 계수의 정보를 수신하는 단계, 상기 기준 보정 계수의 정보에 기초하여, 상기 복수의 AP들 중 상기 기준 AP를 제외한 다른 AP들 각각의 상기 UE와의 채널에 대한 채널 상호성의 보정을 위한 상대 보정 계수를 계산하는 단계, 및 상기 계산된 상대 보정 계수의 정보를, 상기 기준 AP를 제외한 다른 AP들 각각으로 전송하는 단계를 포함할 수 있다.
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According to one embodiment of the present invention, a channel reciprocity calibration method performed by a control node of a communication system comprises the following steps of: receiving channel measurement result information from a plurality of APs connected to a control node through a fronthaul; selecting one reference AP based on the information of the received channel measurement result; receiving, from the reference AP, information on a reference calibration coefficient for calibrating channel reciprocity for a channel with a UE; calculating a relative calibration coefficient for calibrating channel reciprocity with respect to a channel with the UE of each of the APs except for the reference AP among the plurality of APs on the basis of reference calibration coefficient information; and transmitting information on the calculated relative calibration coefficient to each of the APs except for the reference AP. 본 발명의 일 실시예에 따른 통신 시스템의 제어 노드에 의해 수행되는 채널 상호성 보정 방법은, 상기 제어 노드와 프론트홀로 연결된 복수의 AP들로부터, 채널 측정 결과의 정보를 수신하는 단계, 상기 수신된 채널 측정 결과의 정보에 기초하여, 하나의 기준 AP를 선택하는 단계, 상기 기준 AP로부터, UE와의 채널에 대한 채널 상호성의 보정을 위한 기준 보정 계수의 정보를 수신하는 단계, 상기 기준 보정 계수의 정보에 기초하여, 상기 복수의 AP들 중 상기 기준 AP를 제외한 다른 AP들 각각의 상기 UE와의 채널에 대한 채널 상호성의 보정을 위한 상대 보정 계수를 계산하는 단계, 및 상기 계산된 상대 보정 계수의 정보를, 상기 기준 AP를 제외한 다른 AP들 각각으로 전송하는 단계를 포함할 수 있다.</description><language>eng ; kor</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; TRANSMISSION ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><creationdate>2022</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20220513&amp;DB=EPODOC&amp;CC=KR&amp;NR=20220061907A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20220513&amp;DB=EPODOC&amp;CC=KR&amp;NR=20220061907A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LEE JIN</creatorcontrib><creatorcontrib>YU CHANG WAHN</creatorcontrib><creatorcontrib>NA JEE HYEON</creatorcontrib><creatorcontrib>KIM NAM I</creatorcontrib><creatorcontrib>LEE YU RO</creatorcontrib><creatorcontrib>HONG SEUNG EUN</creatorcontrib><title>METHOD AND APPARATUS FOR CALIBRATION OF CHANNEL RECIPROCITY IN WIRELESS COMMUNICATION SYSTEM</title><description>The present invention relates to a method and apparatus for calibrating channel reciprocity in a wireless communication system to easily perform calibration to secure or guarantee uplink/downlink channel reciprocity. 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According to one embodiment of the present invention, a channel reciprocity calibration method performed by a control node of a communication system comprises the following steps of: receiving channel measurement result information from a plurality of APs connected to a control node through a fronthaul; selecting one reference AP based on the information of the received channel measurement result; receiving, from the reference AP, information on a reference calibration coefficient for calibrating channel reciprocity for a channel with a UE; calculating a relative calibration coefficient for calibrating channel reciprocity with respect to a channel with the UE of each of the APs except for the reference AP among the plurality of APs on the basis of reference calibration coefficient information; and transmitting information on the calculated relative calibration coefficient to each of the APs except for the reference AP. 본 발명의 일 실시예에 따른 통신 시스템의 제어 노드에 의해 수행되는 채널 상호성 보정 방법은, 상기 제어 노드와 프론트홀로 연결된 복수의 AP들로부터, 채널 측정 결과의 정보를 수신하는 단계, 상기 수신된 채널 측정 결과의 정보에 기초하여, 하나의 기준 AP를 선택하는 단계, 상기 기준 AP로부터, UE와의 채널에 대한 채널 상호성의 보정을 위한 기준 보정 계수의 정보를 수신하는 단계, 상기 기준 보정 계수의 정보에 기초하여, 상기 복수의 AP들 중 상기 기준 AP를 제외한 다른 AP들 각각의 상기 UE와의 채널에 대한 채널 상호성의 보정을 위한 상대 보정 계수를 계산하는 단계, 및 상기 계산된 상대 보정 계수의 정보를, 상기 기준 AP를 제외한 다른 AP들 각각으로 전송하는 단계를 포함할 수 있다.</abstract><oa>free_for_read</oa></addata></record>
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title METHOD AND APPARATUS FOR CALIBRATION OF CHANNEL RECIPROCITY IN WIRELESS COMMUNICATION SYSTEM
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