PUCCH Resource Allocation for Dual Transmission in Short Timeslots
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Solution Overview
Problem
In the LTE system, a single physical uplink control channel (PUCCH) in a timeslot cannot carry all content, particularly when the timeslot length is reduced to 0.5 ms or less, leading to a need for a method to allocate two PUCCH resources in one timeslot to enhance data transmission efficiency.
Innovation Solution
The proposed solution involves determining a first PUCCH resource index in a subsequent timeslot based on a resource index offset and a minimum index value, allowing for the allocation of a second PUCCH resource on a different physical resource block, using resource offset information to calculate the index and resource location of the second PUCCH, thereby enabling the transmission of two PUCCHs in one timeslot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the timeslot length is reduced to 0.5 ms or less to achieve shorter RTT and lower data transmission latency, then data transmission latency is reduced, but a single PUCCH in the shortened timeslot cannot carry all content
Solution Approach 1:
The patent divides the PUCCH resources into multiple independent resources within a single timeslot. Specifically, it allocates different PUCCH resources to different antenna ports or different uplink-downlink configurations, allowing each PUCCH to carry specific content segments. This segmentation enables the system to maintain short timeslot duration while ensuring all necessary control information can be transmitted through multiple dedicated channels.
2Device complexity
If only one PUCCH is transmitted in one timeslot of 0.5 ms or less, then device complexity is reduced, but the PUCCH cannot carry all content
Solution Approach 1:
The patent creates a universal PUCCH resource allocation mechanism that can adapt to multiple scenarios within the same timeslot structure. By defining resource allocation rules that work across different antenna ports and uplink-downlink configurations, the system achieves multi-functionality without increasing basic transmission complexity. The same resource allocation framework serves multiple purposes: supporting different antenna ports, different configurations, and ensuring complete content transmission.
3Loss of information
If two PUCCH resources are allocated in one timeslot to carry all content, then content carrying capacity is improved, but resource allocation complexity increases
Solution Approach 1:
The patent manages resource allocation complexity by changing key parameters systematically. It introduces specific parameters such as antenna port indices and uplink-downlink configuration identifiers to determine PUCCH resource selection. By establishing clear parameter-based mapping rules (e.g., using formulas that relate CCE indices to PUCCH resources based on these parameters), the system enables multi-resource allocation without proportionally increasing allocation complexity. The parameter changes provide a structured approach to resource management.
Data Source
AI summary
Embodiments of the present invention provide a user equipment, a network device, and a method. The user equipment includes: a receiving unit, configured to receive a physical downlink control channel in an nth timeslot; and a processing unit, configured to determine a first PUCCH resource index of a first PUCCH in an (n+k)th timeslot according to a first resource index offset and a minimum index value, where the first resource index offset is used to indicate an offset of the resource index of the first PUCCH The processing unit is further configured to determine, according to the first PUCCH resource index, an index of a second physical resource block PRB on which a second PUCCH in the (n+k)th timeslot is located, and a second PUCCH resource on the second PRB.