name: NDI
full_form: New Data Indicator
context: assignment for this PDCCH occasion and this Serving Cell has been received on the PDCCH for the MAC entity's C-RNTI, or Temporary C-RNTI: 2> if this is the first downlink assignment for this Temporary C-RNTI: 3> consider the NDI to have been toggled. 2> if the downlink assignment is for the MAC entity's C-RNTI, and if the previous downlink assignment indicated to the HARQ entity of the same HARQ process was either a downlink assignment received for the MAC entity's CS-RNTI or a configured downlink assignment: 3> consider the NDI to have been toggled regardless of the value of the NDI. 2> indicate the presence of a downlink assignment and deliver the associated HARQ information to the HARQ entity. 1> else if a downlink assignment for this PDCCH occasion has been received for this Serving Cell on the PDCCH for the MAC entity's CS-RNTI: 2> if the NDI in the received HARQ information is 1: 3> consider the NDI for the corresponding HARQ process not to have been toggled; 3> indicate the
description: The New Data Indicator (NDI) is a parameter used in Hybrid Automatic Repeat Request (HARQ) processes in LTE and 5G networks. It indicates whether new data is available for transmission or retransmission, influencing how the HARQ entity handles downlink assignments and associated HARQ information.
explanation: The NDI is classified as a Parameter because it is a critical attribute used within the network to manage HARQ processes, specifically toggling between values to indicate the presence of new data for transmission or retransmission. The context from 3GPP TS 38.523 highlights its role in downlink assignments and HARQ information handling.
section_title: 7.1.1.2.2Correct Handling of DL HARQ process PDSCH Aggregation
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