COMMUNICATION SYSTEM AND COMMUNICATION METHOD

To provide a communication system capable of flexibly changing the connection relationship between a subscriber terminal and another terminal that connects to another vCPE when the subscriber terminal is being connected to another vCPE.SOLUTION: A communication system 1 is configured so as to, when a subscriber terminal 100A intends to connect to another vCPE310B, determine whether the connection between another terminal 100B and the other vCPE310B and the connection between the subscriber terminal 100A and the other vCPE310B should be executed in the same network segment on the basis of the connection allowable conditions in the other vCPE310B and the subscriber terminal 100A, and the other vCPE310B allocates a network segment different from the network segment allocated to the other terminal 100B or the same network segment to the subscriber terminal 100A according to the determination.SELECTED DRAWING: Figure 1 【課題】加入者端末が他者ｖＣＰＥに接続する場合に、加入者端末と、他者ｖＣＰＥに接続する他者端末との間の接続関係を柔軟に変更することができる。【解決手段】通信システム１は、加入者端末１００Ａが他者ｖＣＰＥ３１０Ｂに接続する場合に、他者ｖＣＰＥ３１０Ｂ及び加入者端末１００Ａにおける接続許容条件を基に、他者端末１００Ｂ及び他者ｖＣＰＥ３１０Ｂの間の接続と、加入者端末１００Ａ及び他者ｖＣＰＥ３１０Ｂの間の接続とを、同一のネットワークセグメントで実行するか否かを判定し、他者ｖＣＰＥ３１０Ｂは、判定に応じて、加入者端末１００Ａに対して他者端末１００Ｂに割り当てたネットワークセグメントと異なるネットワークセグメント、或いは、同じネットワークセグメントを割り当てる。【選択図】図１