SDM PUSCH Layer-Subset Mapping for Flexible Uplink Modes
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Solution Overview
Problem
There is a need for improvements in 5G NR technology to enhance communication systems, particularly in managing spatial division multiplexing (SDM) physical uplink shared channels (PUSCH) to optimize resource allocation and improve data transmission efficiency.
Innovation Solution
The method involves configuring a network entity to receive and transmit DCI scheduling a PUSCH transmission with distinct subsets of layers, allowing for efficient mapping of transport blocks or codewords based on DCI or RRC configuration, enabling flexible resource allocation and improved data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial division multiplexing (SDM) is implemented to increase data transmission capacity, then the throughput and resource utilization improve, but the system complexity and difficulty of managing layer configurations increase
Solution Approach 1:
The PUSCH transmission is segmented into multiple portions, each associated with different subsets of layers. This segmentation allows the system to manage complex SDM transmissions by breaking them down into smaller, more manageable units that can be independently configured and transmitted through different spatial paths.
Solution Approach 2:
The patent implements dynamic switching between different SDM modes (full SDM, partial SDM, non-SDM) based on channel conditions and traffic requirements. The network entity can dynamically adjust the number of layers and PUSCH portions, allowing the system to adapt to changing conditions while maintaining optimal performance without being locked into a fixed complex configuration.
2Quantity of substance
If multiple layers are used for SDM PUSCH transmission to increase capacity, then the resource utilization improves, but the mapping complexity of transport blocks and codewords increases
Solution Approach 1:
The patent segments the layer set into multiple subsets, where each subset is associated with a specific PUSCH portion. This segmentation simplifies the mapping process by creating a structured relationship between layers and transport blocks, making it easier to manage which TBs are mapped to which layers without having to handle all layers simultaneously.
Solution Approach 2:
Different PUSCH portions are assigned different layer subsets with specific properties. This local differentiation allows the system to optimize mapping for each portion independently, reducing overall mapping complexity by treating different parts of the transmission differently rather than applying a single complex mapping rule to all layers.
3Adaptability or versatility
If flexible SDM configurations are implemented to adapt to different channel conditions, then the system adaptability improves, but the control signaling overhead increases
Solution Approach 1:
The patent enables dynamic switching between full SDM mode, partial SDM mode, and non-SDM mode based on channel conditions and traffic requirements. This dynamic adaptability allows the system to use only the necessary level of SDM complexity for each transmission, reducing control signaling overhead by avoiding unnecessary configuration information when simpler modes suffice.
Solution Approach 2:
The system changes key parameters such as the number of PUSCH portions and the number of layers per portion based on conditions. By allowing these parameters to vary dynamically rather than being fixed, the system achieves high adaptability while controlling overhead through efficient parameter encoding and selection based on current network state.
Data Source
AI summary
Apparatus, methods, and computer program products for transmitting SDM PUSCH are provided. An example method may include receiving, from a second network entity, downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) transmission, where the PUSCH transmission includes a first portion associated with a first subset of layers within a set of layers and a second portion associated with a second subset of layers within the set of layers. The example method may further include mapping at least one transport block (TB) or codeword (CW) to the first portion or the second portion based on the DCI or a radio resource control (RRC) configuration. The example method may further include transmitting the at least one TB or CW to the second network entity.