A communication system for performing multi-hop data communication using a plurality of communication devices (401,402,403), the communication system comprising: a plurality of first communication devices each of which includes: a first communication unit and a second communication unit configured to perform first wireless communication by a first wireless communication technique using a directional radio wave; and a third communication unit configured to perform second wireless communication using a second wireless communication technique wider in communication range than the first wireless communication technique, the plurality of first communication devices configured to form network cells different from each other, using the first communication units; a second communication device including a fourth communication unit configured to perform the first wireless communication with the first communication unit, the second communication device configured to connect to one of the network cells; and a third communication device (401; 403) including a fifth communication unit configured to perform the second wireless communication, the third communication device (401; 403) configured to transmit, using the second wireless communication, instructions to manage a multi-hop communication path; wherein each of the plurality of first communication devices further includes: an information collecting unit configured to collect information of other of the communication devices (401, 402, 403) in the first wireless communication; an information transmission unit configured to transmit the information of other of the communication devices collected by the information transmission unit to the third communication device (401; 403) in the second wireless communication; and a data transfer unit configured to transfer, in the first wireless communication, data received in the first wireless communication to another first communication device or the second communication device, according to one of the instructions to manage a multi-hop communication path transmitted in the second wireless communication from the third communication device (401; 403). a plurality of first communication devices each of which includes: a first communication unit and a second communication unit configured to perform first wireless communication by a first wireless communication technique using a directional radio wave; and a third communication unit configured to perform second wireless communication using a second wireless communication technique wider in communication range than the first wireless communication technique, a first communication unit and a second communication unit configured to perform first wireless communication by a first wireless communication technique using a directional radio wave; and a third communication unit configured to perform second wireless communication using a second wireless communication technique wider in communication range than the first wireless communication technique, the plurality of first communication devices configured to form network cells different from each other, using the first communication units; a second communication device including a fourth communication unit configured to perform the first wireless communication with the first communication unit, the second communication device configured to connect to one of the network cells; and a third communication device (401; 403) including a fifth communication unit configured to perform the second wireless communication, the third communication device (401; 403) configured to transmit, using the second wireless communication, instructions to manage a multi-hop communication path; wherein each of the plurality of first communication devices further includes: an information collecting unit configured to collect information of other of the communication devices (401, 402, 403) in the first wireless communication; an information transmission unit configured to transmit the information of other of the communication devices collected by the information transmission unit to the third communication device (401; 403) in the second wireless communication; and a data transfer unit configured to transfer, in the first wireless communication, data received in the first wireless communication to another first communication device or the second communication device, according to one of the instructions to manage a multi-hop communication path transmitted in the second wireless communication from the third communication device (401; 403). an information collecting unit configured to collect information of other of the communication devices (401, 402, 403) in the first wireless communication; an information transmission unit configured to transmit the information of other of the communication devices collected by the information transmission unit to the third communication device (401; 403) in the second wireless communication; and a data transfer unit configured to transfer, in the first wireless communication, data received in the first wireless communication to another first communication device or the second communication device, according to one of the instructions to manage a multi-hop communication path transmitted in the second wireless communication from the third communication device (401; 403).