Cross-Serving-Cell Spatial Precoding for Flexible Uplink Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in selecting spatial domain precoders for uplink transmissions across multiple serving cells, leading to increased power consumption, latency, and scheduling restrictions.
Innovation Solution
A wireless device utilizes spatial relation information from one serving cell to derive or calculate a spatial domain precoder for uplink transmissions on another serving cell, employing machine learning functions or monitoring downlink reference signals to optimize precoder selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial domain precoders are independently selected for each serving cell, then transmission reliability is improved, but power consumption increases and scheduling flexibility decreases
Solution Approach 1:
The patent merges the precoder selection process across multiple serving cells by deriving precoders for uplink transmissions on one serving cell based on spatial relation information from another serving cell. This consolidation reduces the number of independent precoder selections needed, thereby lowering power consumption while maintaining transmission reliability through cross-cell spatial information utilization.
Solution Approach 2:
The patent enables spatial relation information from a downlink reference signal on one serving cell to serve multiple purposes: it determines the precoder for uplink transmissions on that same cell and also provides the basis for deriving precoders for uplink transmissions on other serving cells. This multi-functional use of spatial information reduces overall system complexity and power consumption.
2Reliability
If spatial domain precoders are independently selected for each serving cell, then transmission reliability is improved, but scheduling flexibility decreases
Solution Approach 1:
By merging the precoder selection across serving cells through cross-cell spatial relation information, the system achieves coordinated scheduling that maintains reliability while improving flexibility. The network can schedule uplink transmissions on different serving cells more freely since the precoder derivation is based on shared spatial information rather than independent per-cell selections.
3Use of energy by moving object
If spatial domain precoders are derived from downlink reference signals, then power consumption decreases, but measurement and detection complexity increases
Solution Approach 1:
The wireless device utilizes downlink reference signals that are already being transmitted and received for other purposes (channel estimation, spatial relation establishment) to derive uplink precoders. This self-service approach reuses existing signal measurements without requiring additional dedicated measurement procedures, thereby reducing power consumption while avoiding increased measurement complexity.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for spatial domain precoders for serving cells. A device may communicate with a network entity on multiple serving cells and may use spatial relation information associated with one serving cell to select a spatial domain precoder for transmissions on another serving cell. For example, the device may derive a spatial domain precoder for a transmission on a first serving cell using spatial relation information for receiving reference signals on a second serving cell. Additionally, or alternatively, the device may calculate a spatial domain precoder for a transmission on a first serving cell in response to monitoring a second serving cell for a downlink reference signal. Additionally, or alternatively, the device may select a spatial domain precoder for a transmission on a first serving cell based on uplink precoding information indicated for a second serving cell.