Hello Experts.
Could you tell me what is the difference between “small msg” and “large msg” when talking about RACH LTE?
Non contention based RACH is always allocated large msg i.e. 512 bits.
While contention based may be allocated large msg or small msg (<256 bits) depending on type of Preamble and Path loss.
In LTE RACH, “small message” and “large message” usually refer to the amount of information the UE needs to send after gaining access. If the required information can fit within the initial signaling exchange, it may be considered a small message. Otherwise, additional procedures and resources are needed to transfer a larger message. The RACH procedure itself remains the same; the difference is mainly in the payload carried after access is established.
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