A communication system comprising: a base station; a communication apparatus; and a gateway apparatus including a first communication unit operable to communicate with the base station in a first communication method, a second communication unit operable to communicate with the communication apparatus in a second communication method, an identification information holding unit operable to hold a correspondence between first identification information in the first communication method and second identification information in the second communication method of the communication apparatus, and a category information holding unit operable to share category information showing a characteristic of the communication apparatus with the communication apparatus, wherein the first communication unit is operable to perform communication of the communication apparatus in accordance with the category information with the base station by using the first identification information of the communication apparatus, and wherein the first communication unit is operable to receive data addressed to the communication apparatus from the base station, and the second communication unit is operable to transmit the data to the communication apparatus. a base station; a communication apparatus; and a gateway apparatus including a first communication unit operable to communicate with the base station in a first communication method, a second communication unit operable to communicate with the communication apparatus in a second communication method, an identification information holding unit operable to hold a correspondence between first identification information in the first communication method and second identification information in the second communication method of the communication apparatus, and a category information holding unit operable to share category information showing a characteristic of the communication apparatus with the communication apparatus, wherein the first communication unit is operable to perform communication of the communication apparatus in accordance with the category information with the base station by using the first identification information of the communication apparatus, and wherein the first communication unit is operable to receive data addressed to the communication apparatus from the base station, and the second communication unit is operable to transmit the data to the communication apparatus. a first communication unit operable to communicate with the base station in a first communication method, a second communication unit operable to communicate with the communication apparatus in a second communication method, an identification information holding unit operable to hold a correspondence between first identification information in the first communication method and second identification information in the second communication method of the communication apparatus, and a category information holding unit operable to share category information showing a characteristic of the communication apparatus with the communication apparatus, wherein the first communication unit is operable to perform communication of the communication apparatus in accordance with the category information with the base station by using the first identification information of the communication apparatus, and wherein the first communication unit is operable to receive data addressed to the communication apparatus from the base station, and the second communication unit is operable to transmit the data to the communication apparatus.