Wireless Communication Node Spatial Signaling for Flexible Duplexing
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Solution Overview
Problem
The existing NR system faces challenges with resource utilization and latency due to half-duplex mode in TDD spectrum, and there is a need for a flexible duplex mode to improve resource efficiency and reduce interference.
Innovation Solution
A method for determining spatial characteristics of physical channels using orthogonal time-domain resource sets and reference signal resources to support flexible duplex modes, allowing simultaneous transmission and reception on subbands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If half-duplex mode is used in TDD spectrum, then cross link interference is reduced, but resource utilization decreases and latency increases
Solution Approach 1:
The patent segments the TDD spectrum into multiple subbands and divides time resources into different resource sets, allowing different duplex modes to be applied to different segments simultaneously. This enables full duplex operation on some subbands while maintaining half-duplex on others, thereby improving overall resource utilization while controlling interference through selective segmentation.
Solution Approach 2:
The patent introduces dynamic duplex mode configuration where the duplex mode can be flexibly changed across different time-frequency resources. By dynamically assigning uplink or downlink directions to different subbands and time slots, the system adapts to varying traffic demands and interference conditions, improving resource utilization without permanently compromising interference management.
2Object-affected harmful factors
If half-duplex mode is used in TDD spectrum, then cross link interference is reduced, but latency increases
Solution Approach 1:
By segmenting the spectrum into subbands with different duplex configurations, the patent enables parallel transmission and reception operations on different subbands. This reduces waiting time for resource availability and lowers latency for time-sensitive applications while maintaining interference control through spatial and spectral separation.
Solution Approach 2:
The dynamic allocation of duplex modes across time-frequency resources allows the system to provide low-latency full duplex service when needed while falling back to half-duplex mode when interference management is prioritized, thereby reducing overall latency without permanently sacrificing interference control.
3Productivity
If flexible duplex mode is supported, then resource utilization improves, but device complexity increases
Solution Approach 1:
The patent designs a unified reference signal resource framework that serves multiple functions: spatial characteristic determination, beam management, and channel state information acquisition. This multi-functional approach allows the same hardware infrastructure to support both half-duplex and full-duplex modes without requiring separate dedicated components, thereby reducing overall hardware complexity while enabling flexible duplex operations.
Solution Approach 2:
The patent implements dynamic configuration of reference signal resources and spatial characteristics through signaling protocols, allowing the network to flexibly adapt to different duplex modes without requiring hardware reconfiguration. This software-defined approach enables flexible duplex operation while minimizing hardware complexity by using reconfigurable rather than fixed hardware architectures.
4Device complexity
If unified solution is used for different scenarios, then hardware complexity is reduced, but adaptability to specific scenarios may be compromised
Solution Approach 1:
The patent employs dynamic configuration mechanisms where reference signal resources, spatial characteristics, and resource set assignments can be flexibly adjusted through signaling to match specific scenario requirements. This allows a single unified hardware platform to adapt to diverse scenarios including eMBB, URLLC, and different duplex modes without requiring scenario-specific hardware modifications, thereby maintaining both low complexity and high adaptability.
Data Source
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AI summary
The present application discloses a method and device for use in wireless communication nodes. A first node receives first signaling and sends a first information block in a first time-frequency resource block. The first signaling is used for indicating the first time-frequency resource block. The first information block comprises an HARQ-ACK related to the first signaling. The first signaling is used for indicating a first reference signal resource. Starting from a first time, the first reference signal resource is used for determining only one of the spatial characteristic of a first-type physical channel in a first time-domain resource set and the spatial characteristic of a first-type physical channel in a second time-domain resource set. A time-domain resource occupied by the first time-frequency resource block is used for determining the first time. The first time-domain resource set and the second time-domain resource set are orthogonal to each other. The start time of the first time-domain resource set and the start time of the second time-domain resource set are not earlier than the first time.