A communication apparatus (1, 1A) comprising: a first communication unit that performs wireless communication with a control apparatus using a first communication system; a second communication unit that performs wireless communication with said control apparatus using a second communication system having a higher transmission speed than said first communication system; and a control unit (13, 13A), wherein said control unit (13, 13A) is configured to: activate said second communication unit when said first communication unit receives an activation request signal from said control apparatus, increase power consumption of said second communication unit, when said second communication unit is activated; increase power consumption of said second communication unit, when a link between said second communication unit and said control apparatus is established, wherein said increase in the power consumption is relative to the power consumption prior to the time the link is established; not to establish the link until said first communication unit receives a connection request signal from said control apparatus, even after said second communication unit is activated, and establish said link between said second communication unit and said control apparatus when said first communication unit receives a connection request signal from said control apparatus after said second communication unit is activated. a first communication unit that performs wireless communication with a control apparatus using a first communication system; a second communication unit that performs wireless communication with said control apparatus using a second communication system having a higher transmission speed than said first communication system; and a control unit (13, 13A), wherein said control unit (13, 13A) is configured to: activate said second communication unit when said first communication unit receives an activation request signal from said control apparatus, increase power consumption of said second communication unit, when said second communication unit is activated; increase power consumption of said second communication unit, when a link between said second communication unit and said control apparatus is established, wherein said increase in the power consumption is relative to the power consumption prior to the time the link is established; not to establish the link until said first communication unit receives a connection request signal from said control apparatus, even after said second communication unit is activated, and establish said link between said second communication unit and said control apparatus when said first communication unit receives a connection request signal from said control apparatus after said second communication unit is activated. activate said second communication unit when said first communication unit receives an activation request signal from said control apparatus, increase power consumption of said second communication unit, when said second communication unit is activated; increase power consumption of said second communication unit, when a link between said second communication unit and said control apparatus is established, wherein said increase in the power consumption is relative to the power consumption prior to the time the link is established; not to establish the link until said first communication unit receives a connection request signal from said control apparatus, even after said second communication unit is activated, and establish said link between said second communication unit and said control apparatus when said first communication unit receives a connection request signal from said control apparatus after said second communication unit is activated.