UE that can be allocated DL (one TTI) when using LTE

Question

what is the limitation in terms of number of UE that can be allocated RB in one TTI/subframe in DL?

Is there any limit defined by the standard? Or would it be possible for instance that 50 UEs would have 1 RB each (for an overall 50 RB BW)?

Answer 1

As i know 50 resource blocks are available for every Transmission Travel Time (TTI) i.e. 1 ms. So in one millisecond if E-NodeB has resources and each UE has 1 RB, it can maximum serve 50 UE's in one TTI.

Theoretically it is the possible but in practical aspects it is very difficult to serve 50 users in one subframe/TTI. To find out this much excellent scheduler is hard.

I feel the limitation of UE also depends upon (Physical Downlink Control Channel) PDCCH capacity. If this channel has enough Control Elements (CCE) and radio bearers are available, E-nodeB can handle those many UE's in one TTI.