name: NACK
full_form: Negative Acknowledgement
context: According to the state diagram shown in Figure 35, the following are pairs of possible codewords which may be transmitted in sub-frames n-1 and n respectively: n-1 n POST + DTX POST + PRE ACK + ACK ACK + NACK ACK + POST NACK + ACK NACK + NACK NACK + POST DTX + DTX PRE + ACK PRE + NACK ACK + PRE NACK + PRE DTX + PRE Some further restrictions can be identified depending on which sub-frames had packets transmitted: PRE can never be transmitted in sub-frame n if no packet was transmitted in sub-frame n+1; ACK and NACK can never be transmitted in sub-frame n-1 if no packet was transmitted in sub-frame n-1; POST can never be transmitted in sub-frame n-1 if no packet was transmitted in sub-frame n-2; POST can never be transmitted in sub-frame n if no packet was transmitted in sub-frame n-1. The receiver algorithm can be designed to make use of this information. For example the results presented in section 6.7.2.3, assumed a procedure as outlined below: (1) Determine which of five possible
description: Negative Acknowledgement (NACK) is a message used in the context of packet transmission and acknowledgement procedures within the 3GPP specifications. It signifies that the receiver has not successfully received or decoded the packets transmitted, prompting retransmission or other corrective actions.
explanation: The classification as a Message entity type is based on the context where NACK is mentioned alongside other messages such as ACK (Acknowledgement), POST, and PRE, all of which are involved in the communication between transmitter and receiver regarding packet transmission status. The specific rules governing when these messages can be transmitted further support their role as signaling data between network components.
section_title: Complexity of PRE/POST scheme
biotag_Context: O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,B-Message,O,B-Message,B-Message,O,B-Message,B-Message,O,O,B-Message,O,B-Message,B-Message,O,B-Message,B-Message,O,O,B-Technology,O,B-Technology,O,O,B-Message,O,O,B-Message,B-Message,O,O,B-Message,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: B-Message,I-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O