HARQ Acknowledgment Bundling Slot Allocation for Relay Stations

The patent segments the acknowledgment mechanism by introducing two types of HARQ acknowledgments: bundled acknowledgments for non-relay WCDs and individual acknowledgments for relay base stations. This segmentation allows the system to apply acknowledgment bundling selectively to certain device types while excluding others, thereby resolving the contradiction by enabling time slot reduction for most devices while preventing retransmission waste for relay base stations.

The patent applies different acknowledgment qualities to different device types. Relay base stations receive individual acknowledgments with higher quality (precise feedback for each subpacket) while non-relay WCDs receive bundled acknowledgments. This local differentiation in acknowledgment quality allows the system to optimize for each device type's specific needs, reducing overall retransmission waste while maintaining efficient time slot usage.

The patent segments the device population into two categories: relay base stations and non-relay WCDs. Each category receives a different acknowledgment mechanism tailored to its requirements. Relay base stations receive individual acknowledgments that maintain high service quality, while non-relay WCDs receive bundled acknowledgments that reduce overhead. This segmentation resolves the contradiction by allowing different complexity-quality tradeoffs for different device types.

The patent implements local quality differentiation by providing high-quality individual acknowledgments to relay base stations and lower-quality bundled acknowledgments to other devices. This localized approach ensures that devices with higher reliability requirements (relay base stations) receive superior service quality, while devices with lower requirements can tolerate the reduced quality of bundled acknowledgments in exchange for lower overhead.

The patent segments the acknowledgment approach by applying individual acknowledgments only to relay base stations while using bundled acknowledgments for non-relay WCDs. This segmentation allows the system to achieve high retransmission efficiency for the critical relay base station segment without requiring individual time slots for all devices, thereby resolving the contradiction between retransmission efficiency and time slot consumption.

The patent applies high-quality individual acknowledgments locally to relay base stations where retransmission efficiency is most critical, while accepting lower-quality bundled acknowledgments for other devices where the impact on overall system productivity is less significant. This localized application of high-quality acknowledgments maximizes retransmission efficiency for the most important devices without proportionally increasing the number of reverse-direction time slots.