Terminal PUCCH Allocation Using Variable PRI-to-CCE Mapping
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Solution Overview
Problem
Existing methods for assigning control information in uplink communication in 5G networks, particularly for ultra-reliable and low-latency communications (URLLC), face inefficiencies due to insufficient scheduling flexibility and increased latency, especially when managing PUCCH resources.
Innovation Solution
A terminal and communication method that dynamically allocate PUCCH resources based on the variable number of PRI bits in DCI, allowing for efficient PUCCH resource allocation by controlling the mapping between PRI values and CCE numbers, even when the number of PUCCH resources exceeds eight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of PUCCH resources is increased to support more uplink control information, then the capacity for control information transmission is improved, but the complexity of resource allocation and scheduling increases
Solution Approach 1:
The patent segments the PUCCH resources into different sets based on their characteristics and allocation methods. It divides the resource allocation process into semi-static configuration (via RRC signaling) and dynamic selection (via DCI), allowing efficient management of a large number of resources through structured categorization and selective allocation.
Solution Approach 2:
The patent implements dynamic PUCCH resource allocation where the base station can dynamically select and indicate specific PUCCH resources from a configured set through downlink control information. This dynamic mechanism allows the system to adapt resource allocation to current transmission needs while maintaining support for a large total number of resources.
2Loss of time
If dynamic PUCCH resource allocation is implemented to reduce latency, then the response time is improved, but the overhead for resource indication increases
Solution Approach 1:
The patent applies partial action by indicating only the necessary resource selection information rather than transmitting complete resource configuration data. The base station provides a compact indication (e.g., resource indicator bits) that suffices to identify the appropriate PUCCH resource from the pre-configured set, avoiding unnecessary overhead while enabling rapid dynamic allocation.
Solution Approach 2:
The patent employs preliminary action by pre-configuring multiple PUCCH resources and their associated parameters through higher-layer signaling before actual transmission occurs. This advance setup eliminates the need for extensive real-time resource indication, reducing latency by having resources ready and only requiring lightweight dynamic selection during transmission.
3Ease of manufacture
If the mapping between PRI values and CCE numbers is fixed, then the implementation simplicity is improved, but the scheduling flexibility deteriorates
Solution Approach 1:
The patent transforms the fixed mapping into a dynamic configuration where the base station can flexibly associate PRI values with different CCE number ranges through higher-layer signaling. This allows the mapping relationship to be adapted to different scheduling scenarios while maintaining a systematic structure that simplifies implementation through configuration rather than hardcoding.
Solution Approach 2:
The patent enables parameter changes in the mapping relationship by allowing the base station to modify the association between PRI values and CCE numbers through configuration parameters. This flexibility is achieved without changing the fundamental mapping mechanism, maintaining implementation simplicity while adapting to various scheduling requirements through parameter adjustment.
Data Source
AI summary
Provided is a terminal comprising: a control circuit which, on the basis of the size of information indicating resource allocation relating to uplink control information, controls allocation of an uplink resource with respect to the uplink control information; and a transmit circuit for transmitting the uplink control information in the uplink resource.