Oscillator approach to quantization of AdS 5 × S 5 superparticle in twistor formulation

Using known relation between $SU(2,2|4)$ supertwistors and $SU\left(2\right)$ bosonic and fermionic oscillators we identify the physical states of quantized massless $Ad{S}_5\times S^5$ superparticle in supertwistor formulation and discuss how they fit into the spectrum of fluctuations of IIB supergravity on $Ad{S}_5\times S^5$ superbackground.