So it will be very difficult and very confusing to follow through a single traffic from a UE to final destination. For example, even for the same data and the same UE, the type of IDs between UE and eNB and type of IDs on X2, S1, S5 interfaces may be different. But in many cases different network components uses different types of IDs even for the same UE and same data. To solve this issues, we use specific IDs. In this case how UE can figure out which data it has to decode and which data it has to discard. Also when the traffic gets transmitted onto the air, each UE is recieving all the physical layer data not only for itself but also for other UE. In this situation, how each of the network components can figure out which traffic is for which UE.

So if you pick any one point along the network architecture and observe the traffic following in and out of the point, it is highly likely that many traffics for multiple users are following through the point. In addition, the network is communicating with many different user (UEs) at the same time. LTE Quick Reference Go Back To Index Home : IDs in LTEĬelluar Network including LTE has very complicated structure and it is made up of may different layers.

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