Msg4 HARQ-ACK PUCCH Repetition Capability Indication
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Solution Overview
Problem
In mobile communications, particularly in scenarios with large coverage requirements, there is a need to enhance the transmission efficiency of Message 4 (Msg4) hybrid automatic repeat request (HARQ) acknowledgement (ACK) or negative ACK (NACK) in wireless communication systems, as existing technologies do not support repetitive transmission of Msg4 HARQ-ACK or Msg4 HARQ-NACK information.
Innovation Solution
The proposed solution involves an apparatus that receives a system information block (SIB) containing physical uplink control channel (PUCCH) repetition numbers for Msg4, reports capability indication of PUCCH repetition for Msg4 HARQ-ACK or Msg4 HARQ-NACK through Message 1 (Msg1) or Message 3 (Msg3), and transmits PUCCH with HARQ-ACK or HARQ-NACK information repetitively based on the indicated PUCCH repetition numbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetitive transmission of Msg4 HARQ-ACK or Msg4 HARQ-NACK is implemented, then transmission efficiency and communication reliability are improved, but device complexity and protocol complexity increase
Solution Approach 1:
The patent introduces a new parameter 'pucch-RepetitionNumberForMsg4' to control the repetition behavior of Msg4 HARQ-ACK/NACK transmissions. By changing this parameter, the system can enable or disable repetitive transmission based on coverage conditions, thus improving reliability without permanently increasing complexity
Solution Approach 2:
The patent makes the transmission behavior dynamic by allowing the network to dynamically configure whether Msg4 HARQ-ACK/NACK should be transmitted repetitively based on coverage conditions. The UE can dynamically adjust its transmission strategy based on received system information, transforming a static protocol into a adaptive system
2Productivity
If PUCCH repetition numbers are dynamically adjusted and reported, then transmission efficiency is improved, but ease of operation and protocol simplicity are reduced
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports its capability indication regarding PUCCH repetition for Msg4 HARQ-ACK/NACK in Message 1 or Message 3. This feedback allows the network to understand UE capabilities and configure appropriate repetition numbers, improving transmission efficiency while maintaining operational simplicity through automated capability negotiation
Solution Approach 2:
The patent performs preliminary action by having the UE report its capability indication before the actual Msg4 transmission occurs. The network uses this pre-reported capability information to pre-configure the repetition behavior, avoiding the need for complex real-time negotiations and simplifying the overall operation
Data Source
AI summary
Various solutions for capability indication of repetition for Message 4 (Msg4) hybrid automatic repeat request (HARQ)-acknowledgement (ACK) or Msg4 HARQ-negative ACK (NACK) are described. An apparatus may receive a system information block (SIB) from a network node of a wireless network, wherein the SIB comprises one or more physical uplink control channel (PUCCH) repetition numbers for Msg4. The apparatus may report a capability indication of PUCCH repetition for Msg4 HARQ-ACK or Msg4 HARQ-NACK to the network node through a Message 1 (Msg1) or a Message 3 (Msg3). The apparatus may transmit with repetitions a PUCCH with HARQ-ACK information or HARQ-NACK information for Msg4 to the network node according to one of the one or more PUCCH repetition numbers for Msg4.