Uplink Control Channel Resource Mapping for 5G Collision Avoidance
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Solution Overview
Problem
In 5G communications systems, the existing methods for uplink control channel resource mapping lead to collisions, resulting in high information transmission errors and low applicability due to the fixed placement of frequency domain resources for multiple pieces of downlink control information, which affects the accuracy of uplink control information transmission.
Innovation Solution
The method involves determining uplink control channel resources based on preconfigured or access network device-sent resource configuration information, allowing for flexible selection of frequency and time domain resources, reducing collisions and signaling overheads, and improving the accuracy of UCI transmission by associating the resources with specific offsets and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If frequency domain resources for PUCCH are fixed in the same location for multiple DCI pieces, then resource allocation is simplified, but resource collision occurs and transmission accuracy deteriorates
Solution Approach 1:
The patent assigns different frequency domain resource locations to PUCCHs corresponding to different DCI pieces. Specifically, when multiple DCI pieces are present in a slot, each DCI's corresponding PUCCH is mapped to a distinct frequency location within the uplink system bandwidth, rather than using a fixed common location. This local differentiation eliminates resource collisions while maintaining manageable allocation complexity.
2Loss of information
If multiple PUCCHs are mapped to the same frequency domain resource location, then signaling overhead is reduced, but resource collision occurs and applicability decreases
Solution Approach 1:
The patent introduces dynamic frequency domain resource allocation for PUCCH based on the number and positions of DCI pieces in a slot. The frequency location of each PUCCH is determined dynamically according to its corresponding DCI's characteristics, enabling the system to adapt to varying traffic conditions and multiple DCI scenarios while avoiding resource collisions.
3Ease of manufacture
If fixed frequency domain resource placement is used for PUCCH, then implementation is simpler, but transmission error rate increases due to resource collision
Solution Approach 1:
The patent segments the uplink system bandwidth into multiple frequency domain resource locations for PUCCH allocation. Each DCI piece's corresponding PUCCH is assigned to a specific segment (frequency location) based on predetermined rules, preventing overlaps and collisions between multiple PUCCHs while maintaining clear and simple allocation procedures.
Data Source
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AI summary
Embodiments of the present invention disclose an uplink control channel resource mapping method and apparatus. The method includes: obtaining, by a terminal device, resource configuration information of an uplink control channel, where the resource configuration information includes a parameter corresponding to first information, the first information includes at least one of subband information of the terminal device and second information, and the second information includes at least one of the following information: time domain information and/or frequency domain information of a resource in which downlink control information DCI of the terminal device is located; slot type information of the terminal device; and time domain information and/or frequency domain information of a resource in which a downlink shared channel data packet of the terminal device is located; and determining, by the terminal device, an uplink control channel resource based on the resource configuration information, and sending uplink control information on the uplink control channel resource. The embodiments of the present invention have advantages in avoiding a collision in occupancy of an uplink control channel resource and improving accuracy of transmitting uplink control information.