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The Physical Uplink Shared Channel (PUSCH) is the main physical channel used by a 5G NR UE to send user data toward the gNB. For a protocol test engineer, however, PUSCH is much more than “the uplink data channel.” 3GPP defines the PUSCH physical-layer processing and resource mapping primarily across TS 38.211, TS 38.212, TS 38.213 and TS 38.214, while TS 38.331 carries the RRC configuration used by the UE. 1. What exactly is PUSCH? In simple terms: PUSCH = the physical upl