According to one embodiment, a communication apparatus includes a first communication module configured to communicate with at least one partner device by a first communication scheme, a second communication module configured to communicate with at least one partner device by a second communication scheme, and an address management module configured to assign an address value for the second communication scheme to at least one partner device connected via the second communication module based on the address value for the first communication scheme of the self device, which is assigned based on an address value assignment scheme defined by the first communication scheme.