request for reserve processing to the bav device 102 the bav device 102 which has received the request for reserve made by the ac c command transfers the request for reserve processing made by the lav device 103 to the proxy client 108 existing in the fav device 101 if the request for reserve processing of the bav device 102 made by the lav device 103 is accepted the proxy client 108 carries out reserve processing based on the havi mechanism on the fcm 107 through the resource manager 110 if the reserve processing carried out on the fcm 107 is successful the proxy client 108 is cataloged in the fcm 107 as a record of a client reserving the fcm 107 receiving a result indicating successful reserve processing of the fcm 107 the proxy client 108 transmits an av c command serving as a response indicating the successful reserve processing to the bav device 102 receiving the av c command serving as a response from the proxy client 108 the bav device 102 transmits an av c command serving as a response indicating the successful reserve processing to the lay device 103 as a result of these pieces of processing the bav device 102 is reserved by the lav device 103 and the fcm 107 in the fav device 101 is reserved by the proxy client 108 thus in processing p 302 the lav device 103 is capable of remotely controlling the bav device 102 in an exclusive manner by issuing an av c.