公开(公告)号：US20190223062A1

公开(公告)日：2019-07-18

申请号：US16360156

申请日：2019-03-21

申请人： MAVENIR SYSTEMS, INC.

发明人： Nishi KANT ,  Ajaypal SINGH ,  Sudhagar CHINNASWAMY

IPC分类号： H04W36/00 ,  H04W28/02 ,  H04W76/12 ,  H04W76/11 ,  H04L12/46 ,  H04L12/66 ,  H04L29/12

CPC分类号： H04W36/0022 ,  H04L12/4633 ,  H04L12/66 ,  H04L45/00 ,  H04L45/302 ,  H04L61/3075 ,  H04W28/0268 ,  H04W76/11 ,  H04W76/12 ,  H04W92/14

摘要： Use of available bits in the TEID field of the GTP header to hold information needed to recreate at least a partial state of the session, enough for it to be routed, without waiting for a full state update. The GTP PDU contains the IP Payload with the source and destination IP addresses. The embodiments use that information and the coded TEID bits to provide sufficient routing information so that the packet can be routed without the full state. The TEID is coded to include bits identifying the APN and bits identifying the QCI of the session. A bit can be used to indicate drop if the full state not available. The remaining bits are used to identify unique user sessions. Some of the TEID bits can be encoded with the charging ID. Because sufficient routing information is provided in each packet, a backup gateway does not need to checkpoint.