Wireless relay system, and wireless relay method

A wireless relay system comprising:

• a plurality of radio relay apparatuses that relays radio communication,
• wherein the radio relay apparatus includes a first software radio device that performs radio communication with a radio control device and a second software radio device that performs radio communication with a radio terminal which is under control of the radio control device,
• wherein the first software radio device captures, as iq data, a radio signal received from the radio control device, transfers the captured iq data to the second software radio device in real time, converts the iq data transferred from the second software radio device into a radio signal, and transmits the radio signal to the radio control device,
• wherein the second software radio device captures, as iq data, a radio signal received from the radio terminal, transfers the captured iq data to the first software radio device in real time, converts the iq data transferred from the first software radio device into a radio signal, and transmits the radio signal to the radio terminal,
• wherein the plurality of radio relay apparatuses includes an aggregating radio relay apparatus and a radio relay apparatus other than the aggregating radio relay apparatus,
• wherein the aggregating radio relay apparatus includes a first transfer destination control circuitry that controls the first software radio device included in the aggregating radio relay apparatus to transfer a data signal to and from the second software radio device included in the other radio relay apparatus that is not the aggregating radio relay apparatus, and a first monitor circuitry that activates the first transfer destination control circuitry when a predetermined condition is satisfied, and
• wherein the radio relay apparatus that is not the aggregating radio relay apparatus includes a second transfer destination control circuitry that controls the second software radio device included in the radio relay apparatus to transfer a data signal to and from the first software radio device included in the aggregating radio relay apparatus, instead of the first software radio device included in the radio relay apparatus that is not the aggregating radio relay apparatus, and a second monitor circuitry that activates the second transfer destination control circuitry when a predetermined condition is satisfied.