PUCCH Resource Mapping for Dynamic TDD Slot Format Adaptation
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Solution Overview
Problem
In wireless communication networks, particularly in 5G NR systems, dynamic time division duplex (TDD) configurations face challenges in efficiently managing resource indication for uplink control channels, leading to potential collisions and difficulties in adapting to dynamic slot format changes, which affects spectrum efficiency and communication reliability.
Innovation Solution
The method involves determining a slot format indicator (ID) that correlates with a slot format configuration and mapping it to a respective uplink channel resource identifier (ID), enabling identification of specific sub-slots or symbols for uplink transmissions on the physical uplink control channel (PUCCH), thereby providing a resource indication to avoid collisions and adapt to dynamic TDD slot format changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD slot format changes are implemented to improve spectrum efficiency, then adaptability is improved, but resource collision and reliability deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUCCH resource sets and establishing mapping relationships between slot format indicators and uplink channel resources before dynamic TDD changes occur. The network node pre-prepares resource allocations for different slot formats, so when slot format changes happen dynamically, the UE can immediately use the pre-established mapping without causing collisions, thus maintaining reliability while enabling adaptability.
2Reliability
If traditional static resource allocation is used to maintain reliability, then communication reliability is preserved, but adaptability to dynamic TDD changes deteriorates
Solution Approach 1:
The patent applies dynamics by creating a dynamic resource allocation mechanism where PUCCH resources are mapped to slot format indicators. The system transitions from static resource allocation to dynamic allocation that adapts to changing slot formats. The network node dynamically determines which PUCCH resource set to use based on the current slot format indicator, allowing the system to maintain reliability through structured resource management while achieving adaptability to dynamic TDD changes.
3Adaptability or versatility
If multiple PUCCH resource sets are configured to improve adaptability, then adaptability to dynamic TDD changes is improved, but device complexity increases
Solution Approach 1:
The patent applies the intermediary principle by introducing slot format indicators as a mediator between dynamic TDD slot formats and PUCCH resource allocation. Instead of directly managing complex resource mappings, the system uses SFI as an intermediate layer that simplifies the relationship. The SFI indicates the current slot format, and pre-established mapping rules translate this into appropriate PUCCH resource selection, reducing the complexity burden on both network node and UE while maintaining high adaptability.
Data Source
AI summary
Aspects relate to an uplink channel resource indication for dynamic time division duplex systems where a number of various slot formats may be utilized. A slot format indicator (ID) for a physical uplink control channel (PUCCH) may be mapped to a respective uplink channel resource identifier (ID). The mapping correlates the slot format ID with the uplink channel resource ID to thereby identify at least one particular sub-slot or symbol in a slot usable for uplink (UL) transmissions on the uplink channel.