本文提出了閘道重置發生時的群體換手機制。被 MRN 所服務的使用者在進行換手程序時，可以透過代表性的轉換路徑要求 (path switch request) ，同時觸發其他相同移動狀態使用者需要執行的 path switch 以及 bearer modification 程序，減少瞬間大量換手信令對網路的負擔，並縮短換手所需時間，可應用於最主要的兩種佈建架構。;Moving network is the important research technology for 5G network, which is to ensure that when the user is in the moving state also can enjoy the high-quality communication, the main scenario is for high-speed rail trains.
In the high-speed rail scenario since the high-speed rail run at a speed of more than 300 km/h and the high user density, it will cause high handover frequency and a large number of the handover request at the same time. Build the mobile relay node (MRN) on the high-speed rail to perform the group handover for the user is the most feasible method. However, when MRN performs the handover with gateway relocation, it needs to send the path switch request per UE, resulting in a large number of signaling overhead.
In this paper, we proposed a group handover with gateway relocation mechanism that MRN can send a representative message and trigger the path switch for all UE under the same group therefore reduce the handover latency and signaling overhead. And our scheme can apply for different MRN architecture.
