COMMUNICATION METHOD, COMMUNICATION SYSTEM, RELAY DEVICE AND RELAY PROGRAM

To provide a mobile core network capable of appropriately authenticating a terminal with no built-in SIM.SOLUTION: A communication system 7 has a relay device 1 included in a fixed core network 6 and an HSS 56 included in a mobile core network 5. A relay device 1 issues IMSI information corresponding to a subscriber identifier of a non-SIM terminal 3 and authentication information corresponding to the IMSI information, and comprises of an issuing part 21 for transmitting the subscriber identifier and the IMSI information to the mobile core network 5, and a termination part 23 for transmitting the IMSI information and the authentication information of the non-SIM terminal 3 to the mobile core network 5. The HSS 56 holds the subscriber identifier and the IMSI information associating them each other and authenticates the IMSI information and the authentication information of the non-SIM terminal.SELECTED DRAWING: Figure 1 【課題】ＳＩＭを内蔵しない端末を、移動コア網が適切に認証する。【解決手段】通信システム７は、固定コア網６に含まれる中継装置１と移動コア網５に含まれるＨＳＳ５６を備える。中継装置１は、非ＳＩＭ端末３の加入者識別子に対応するＩＭＳＩ情報と、ＩＭＳＩ情報に対応する認証情報を発行し、移動コア網５に、加入者識別子およびＩＭＳＩ情報を送信する発行部２１と、非ＳＩＭ端末３のＩＭＳＩ情報と認証情報を、移動コア網５に送信する終端部２３を備える、ＨＳＳ５６は、加入者識別子およびＩＭＳＩ情報を対応づけて保持し、非ＳＩＭ端末のＩＭＳＩ情報と認証情報を認証する。【選択図】図１