PHICH Resource Allocation for Multiple HARQ Timings
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Solution Overview
Problem
Existing LTE systems face communication failures due to PHICH resource conflicts when user equipment needs to receive ACK/NACK information for data packets with different HARQ timings, leading to inefficient data transmission.
Innovation Solution
The method involves configuring multiple HARQ timings based on data packet categories, such as size or modulation scheme, and using HARQ offset parameters to calculate unique PHICH resource indexes, avoiding conflicts by distinguishing between different HARQ timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single HARQ timing is used in the existing LTE system, then the system maintains simple timing structure, but it causes PHICH resource conflicts when UE needs to receive ACK/NACK information for multiple data packets with different HARQ timings
Solution Approach 1:
The patent segments the PHICH resource space by introducing HARQ offset parameters that differentiate PHICH resources for different HARQ timings. Each HARQ timing is assigned unique PHICH resource indexes through offset calculations, allowing multiple HARQ processes to operate simultaneously without resource conflicts.
Solution Approach 2:
The patent changes the PHICH resource allocation parameters by introducing HARQ offset parameters (n_HARQ) that modify the standard PHICH resource index calculation. This parameter change enables the system to support multiple HARQ timings by adjusting the time offset for each HARQ process, thereby resolving resource conflicts while maintaining adaptability.
2Adaptability or versatility
If multiple HARQ timings are supported with different time lengths, then the system improves adaptability for different data services, but it increases complexity in PHICH resource allocation and timing coordination
Solution Approach 1:
The patent introduces HARQ offset parameters as configurable variables that define time relationships between different HARQ timings. By changing these parameter values, the system can flexibly support multiple HARQ timings with different time lengths without requiring complex resource allocation algorithms, thus managing complexity through parameterization.
Solution Approach 2:
The patent creates a universal PHICH resource allocation mechanism that works for both single and multiple HARQ timings. The same PHICH resource index calculation formula is used universally, with the addition of HARQ offset parameters that automatically adapt to different timing scenarios, simplifying the overall system design while supporting multiple functions.
Data Source
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AI summary
Embodiments of the present invention provide a method, user equipment, and a base station for transmitting data. The method for transmitting data includes: receiving, by user equipment UE, multiple hybrid automatic repeat request HARQ timings from a base station, where each of multiple data packets to be sent by the UE is corresponding to one of the multiple HARQ timings; receiving, by the UE, multiple HARQ offset parameters from the base station, where the HARQ offset parameters are in one-to-one correspondence with the multiple HARQ timings; obtaining, by the UE by means of calculation, multiple PHICH resource indexes respectively according to the multiple HARQ offset parameters, where the multiple PHICH resource indexes respectively point to different PHICH resources; and sending, by the UE, the multiple data packets to the base station, determining, according to the multiple HARQ timings, a time domain resource for receiving a feedback response, and receiving the feedback response on the time domain resource by using the different PHICH resources.