Configured Grant Retransmission for Unlicensed Spectrum Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing configured grants in unlicensed cells, particularly in terms of resource allocation and scheduling, which affects the overall performance and capacity of wireless networks.
Innovation Solution
The implementation of advanced radio access network (RAN) architecture and protocol stacks, including configured grants for unlicensed cells, utilizing next-generation Node B (gNB) and evolved Node B (ng-eNB) nodes, which employ advanced modulation and transmission mechanisms such as OFDMA, CDMA, and hybrid mechanisms, along with dynamic modulation and coding schemes, to optimize resource allocation and scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grants are used in unlicensed cells, then resource allocation efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring grants for unlicensed cells before actual data transmission. The network device预先 configures multiple configured grants with different parameters (time resources, frequency resources, modulation schemes) so that when data needs to be transmitted, the UE can immediately use the pre-configured grant without waiting for dynamic scheduling, thus improving resource allocation efficiency while the complexity is managed through automated configuration procedures
Solution Approach 2:
The patent implements dynamics by allowing the network device to dynamically adjust and reconfigure granted resources based on changing channel conditions and traffic demands. The configured grants can be activated, deactivated, or modified through RRC signaling, enabling the system to adapt to varying unlicensed spectrum conditions while maintaining efficient resource utilization without requiring complex real-time scheduling decisions
2Productivity
If advanced modulation and transmission mechanisms are implemented, then data transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by implementing advanced modulation schemes (QPSK, 16QAM, 64QAM, 256QAM) and varying transmission parameters such as subcarrier spacing, cyclic prefix lengths, and resource block allocations. These parameter changes enable the system to adapt to different channel conditions and achieve higher data transmission rates while the complexity is managed through standardized parameter sets defined in the protocol
Solution Approach 2:
The patent implements universality by designing a multi-functional RAN architecture where gNB and ng-eNB nodes can operate with multiple transmission mechanisms simultaneously. The base station can handle both licensed and unlicensed cells, support multiple numerologies, and provide various services (eMBB, URLLC, mMTC) through a unified platform, thereby improving overall system performance without proportionally increasing individual device complexity
3Productivity
If resource allocation is optimized in unlicensed cells, then network capacity is improved, but scheduling difficulty increases
Solution Approach 1:
The patent applies segmentation by dividing the unlicensed spectrum resources into multiple configured grants with distinct time-frequency allocations. Each configured grant is assigned specific resource blocks, time slots, and transmission parameters, allowing the network to efficiently manage multiple UEs simultaneously. This segmentation increases network capacity by better utilizing available resources while simplifying scheduling through pre-defined resource partitions
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors channel conditions, interference levels, and transmission success in unlicensed cells, and uses this information to adjust configured grant parameters. The feedback loop includes HARQ acknowledgments, channel quality indicators, and interference measurements that enable the scheduler to optimize resource allocation dynamically, thereby improving network capacity while managing scheduling complexity through data-driven decisions
Data Source
AI summary
A wireless device receives one or more radio resource configuration messages indicating periodic radio resources of a first configured grant. The wireless device transmits, via resource occasions of the periodic radio resources, one or more first code block groups of a first transport block, and one or more second code block groups of a second transport block. One or more downlink control information are received indicating negative acknowledgements for: the one or more first code block groups and the one or more second code block groups. The wireless device retransmits, via a first radio resource occasion of the periodic radio resources of the first configured grant, the one or more first code block groups and the one or more second code block groups.