Multi-TCI Data Scheduling for Low-Latency PDSCH Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing data scheduling and resource allocation across multiple technologies and releases, particularly in 5G networks, leading to suboptimal performance and increased latency.
Innovation Solution
Implementing a flexible data scheduling mechanism that adapts to network conditions and device capabilities, utilizing modular configurations and protocols to optimize resource allocation and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple data scheduling mechanisms are implemented to support different wireless technologies and releases, then compatibility and versatility are improved, but system complexity and difficulty of management increase
Solution Approach 1:
The patent implements a universal data scheduling mechanism where a single scheduling entity can handle multiple wireless technologies (5G NR, LTE, Wi-Fi) and multiple releases through a unified resource pool and common scheduling procedures. The MAC entity maintains multiple configured grant configurations and random access configurations that can be activated based on the required technology and release, allowing one system to perform multiple scheduling functions rather than requiring separate scheduling mechanisms for each technology.
Solution Approach 2:
The patent employs a nested configuration structure where configured grant configurations and random access configurations are organized in hierarchical layers. Higher-level configurations contain references to lower-level parameters, and configurations from different releases can be nested within each other. This allows the system to manage complexity by organizing multiple technology-specific configurations within a unified hierarchical framework, where each configuration can be independently managed while maintaining overall system coherence.
2Productivity
If dynamic scheduling adjustments are made to optimize resource allocation, then data transmission efficiency is improved, but processing overhead and latency increase
Solution Approach 1:
The patent implements preliminary configuration of grant parameters and random access parameters before actual data transmission is needed. The network configures multiple grant configurations with pre-defined parameters (time resources, frequency resources, modulation schemes) and pre-allocates random access resources. When data needs to be transmitted, the UE can immediately activate a pre-configured grant or use pre-allocated random access resources without requiring real-time parameter negotiation, thus improving transmission efficiency while minimizing latency.
Solution Approach 2:
The patent enables dynamic switching between different configured grant configurations and random access configurations based on current network conditions, traffic requirements, and available resources. The MAC entity can activate or deactivate specific configurations dynamically, and the UE can select appropriate configurations from the pool of pre-configured options. This dynamic adaptability allows the system to optimize resource allocation in real-time while avoiding the latency overhead of creating new configurations during active transmission.
Data Source
AI summary
A wireless device receives a first downlink control information (DCI) indicating at least two TCI states of a plurality of TCI states for both uplink transmissions and downlink receptions via a cell. The at least two TCI states comprise a first TCI state and a second TCI state. The wireless device receives a second DCI scheduling a physical downlink shared channel (PDSCH) reception via the cell. The second DCI includes a TCI field and a field, wherein a first value of the field indicates applying the first TCI state to the PDSCH reception, a second value of the field indicates applying the second TCI state to the PDSCH reception, and a third value of the field indicates applying the first TCI state and the second TCI state to the PDSCH reception. The wireless device receives, via the PDSCH, a transport block based on the field.