Thank you for this nice presentation. Just a small thing, parenthesis is missing here:
Now that TEIDs specific to UEs are used, the LTE network can distinguish its subscribers (UEs) from one another by checking their TEIDs instead of IP addresses (P-GWs check both TEIDs and IP addresses of UEs, eNBs and S-GWs check TEIDs only).

so basically there are 4 TEIDs between SGW and PGE per UE?  2 for User Plane(DL & UL) and 2 for Control Plane(UL & DL)?

Thank you for sharing this information, i have one additional query about the UL packet routing at eNB level, if the route is not learnt for SGW/PGW , then how will eNB transmit the received UL packet, will it drop or send via default route.

Also, say the UL TEID SGW/PGW is not reachable from eNB, then is there any mechanism that eNB informs to MME to restrict for selecting the affected SGW/PGW from being allocated.

Your responses are awaited regarding these queries.

Thanks and Regards,

Nirav Kapoor

Please provide explainatin for Downlink packet also(from internet to UE).

Regards

SaLoni

 Hi, 2 for User Plane(DL & UL) and 2 for Control Plane(UL & DL)? why 

 Merhaba, Kullanıcı Düzlemi için 2 (DL & UL) ve Kontrol Düzlemi için 2 (UL & DL)? Neden