LTE:What is the smallest unit the scheduler can allocate? What is the name of that unit?

Question

the first question raised to me why 2 slots for subframe
why cant one slot for subframe or more slots in the subframe?
why did the frame is devided into subframe level
what is the significance of the subframe

Answer 1

Minimum resource unit that the LTE scheduler can allocate to a UE in OFDMA is a RB, Specifically, from MAC layer perspective, an RB in the time domain is one TTI and one subband in the frequency domain
(180 kHz). The LTE scheduler is invoked for every TTI to allocate the resource blocks to the UEs following specific priority metrics. For the FD version, the LTE scheduler distinguishes the resources along both the frequency and time scales; hence, the minimum resource unit to allocate is a RB within a TTI.

In contrast, the TD version of LTE scheduler assigns all RBs of the wideband to one UE in the current
TTI. So smallest unit of allocation is actually the RBG rather than RB.

Hope this clears your doubt.

Comments

I heard minimum 2 RBs required for allocation . How far it is correct ?

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it is two RBs. one RB per slot

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I also have similar impression, its 2 RB...

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It is not 1 RB rather it is two RBs also known as a Scheduling Block and this is also known as 1 TTI i.e 1ms.