Multi-Antenna Transmission Resource Pool Segmentation for UE Complexity Reduction
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Solution Overview
Problem
In massive MIMO wireless communication systems, the complexity of user equipment (UE) increases due to the need for blind detection of downlink control information (DCI) using different analog beamforming vectors, leading to inefficient resource allocation and increased processing load.
Innovation Solution
Establishing a one-to-one correspondence between time units and beamforming vectors allows UE to monitor DCI only on the relevant time unit, reducing the complexity by associating sub-time resource pools with specific antenna port groups, enabling efficient resource allocation and flexible beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channels using different analog beamforming vectors are multiplexed in TDM, then transmission quality is improved, but the number of blind detections by UE increases and UE complexity increases
Solution Approach 1:
The patent segments the time domain into multiple time units, where each time unit is associated with a specific analog beamforming vector. The UE determines its associated time unit based on beamforming vector indication, thereby segmenting the blind detection process into targeted monitoring of specific time units rather than all time units, reducing overall complexity while maintaining transmission quality
Solution Approach 2:
The patent performs preliminary association between UE and time units based on beamforming vectors before actual control channel transmission. The UE determines its associated time unit in advance through beamforming vector indication, preparing the monitoring strategy beforehand to avoid exhaustive blind detection across all time units
2Reliability
If UE performs blind detection on DCI in each time unit, then control channel reception is ensured, but the number of blind detections increases and processing load increases
Solution Approach 1:
The patent segments the blind detection process by dividing time units into associated and unassociated categories based on beamforming vector matching. UE only performs blind detection on DCI in associated time units, segmenting the search space to eliminate unnecessary processing in unassociated time units while ensuring control channel reception reliability
Solution Approach 2:
The patent applies partial action by having UE monitor only a subset of time units (associated time units) rather than all time units. This partial monitoring approach is sufficient for reliable control channel reception since the associated time unit contains the relevant DCI, avoiding excessive processing in unassociated time units
3Adaptability or versatility
If multiple antenna port groups are used for downlink transmission, then beamforming flexibility is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments resource allocation by associating each antenna port group with specific time units based on beamforming vectors. This segmentation allows independent resource management for each antenna port group in its associated time units, maintaining beamforming flexibility while simplifying resource allocation through structured organization rather than holistic management
Solution Approach 2:
The patent applies local quality by allowing different resource allocation strategies for different antenna port groups in their respective associated time units. Each antenna port group can have optimized resource allocation tailored to its specific beamforming characteristics, maintaining flexibility while managing complexity through localized optimization rather than uniform allocation
Data Source
AI summary
The present disclosure provides a method and device for multi-antenna transmission in UE and base station. The user equipment receives a first wireless signal at first; then transmits a second wireless signal, and monitors a first signaling in a first sub-time resource pool. Wherein the first wireless signal is transmitted by K antenna port group(s) and the second wireless signal is used to determine the first antenna port group. The first antenna port group is one of the K antenna port group(s). The first sub-time resource pool is reserved to the first antenna port group, or the index of the first antenna port group is used to determine the first sub-time resource pool. One antenna port group includes positive integer number of antenna ports, and the K is a positive integer greater than 1. The disclosure reduces the complexity of blind detection of downlink signaling by the UE.