HARQ Codeword Padding for WLAN Reliability and Latency

The patent applies preliminary action by pre-negotiating HARQ parameters between transmitting and receiving devices before actual data transmission. This includes agreeing on HARQ process numbers, redundancy versions, and other critical parameters in advance, allowing the receiving device to prepare buffers and processing logic beforehand. This preparation eliminates delays during retransmission events, directly reducing latency while maintaining reliability through the established HARQ framework.

The patent implements parameter changes by dynamically adjusting HARQ-specific parameters such as redundancy version (RV), HARQ process number, and new data indicator (NDI) values based on transmission conditions. The transmitting device selects appropriate parameter combinations from predefined sets and notifies the receiving device, enabling adaptive optimization of retransmission performance. This allows the system to balance reliability and latency by choosing parameters suited to current channel conditions and traffic requirements.

The patent applies universality by designing the HARQ implementation to handle multiple functions within a unified framework. The same HARQ mechanism serves both initial transmissions and retransmissions, manages multiple parallel data flows through multiple HARQ processes, and accommodates different traffic types (video, cloud access, offloading) using the same protocol structure. This multi-functionality reduces the need for separate specialized protocols, thereby limiting the increase in device complexity while achieving improved reliability.

The patent implements segmentation by dividing data into multiple transport blocks and assigning each to separate HARQ processes. This allows parallel processing of multiple data segments through different HARQ instances, improving throughput and reliability without requiring a single complex protocol handler. Each HARQ process maintains independent state information, enabling modular management that limits overall device complexity while achieving robust error recovery across multiple data streams.

The patent applies periodic action by structuring HARQ retransmissions to occur at regular, predictable intervals defined by the wireless communication protocol. Instead of immediate or random retransmission attempts, the system schedules retransmissions after fixed time periods, allowing other devices to anticipate and manage their transmissions accordingly. This periodic structure reduces unpredictable interference in dense WLAN environments while maintaining reliability through systematic retry mechanisms.

The patent implements continuity of useful action by maintaining active HARQ processes that continuously monitor transmission status and automatically initiate retransmissions when needed. Rather than breaking the data flow with repeated stop-and-wait cycles, the system keeps multiple HARQ processes running in parallel, ensuring continuous data delivery. This continuous operation reduces the need for frequent protocol negotiations and maintains steady throughput even in interference-prone dense environments.