Secondary Cell Beam Selection Guided by Primary Cell Direction
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam associations between primary and secondary cells, particularly in scenarios involving multiple-access technologies like LTE and NR, which affect communication efficiency and connectivity.
Innovation Solution
The implementation of primary cell beam-based secondary cell beam indications, where a user equipment (UE) measures and selects a subset of beams from a set of beams associated with a secondary cell based on a first spatial direction, and establishes a connection using a second beam from this subset, guided by measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE measures and selects beams from secondary cell based on primary cell beam indication, then beam management efficiency is improved, but the complexity of beam association procedures increases
Solution Approach 1:
The network node performs preliminary beam indication by providing the UE with spatial information from the primary cell before the UE needs to measure secondary cell beams. This preliminary action guides the UE to focus measurements on a subset of candidate beams that are spatially related to the primary cell's active beam, thereby improving efficiency while the standardized procedure framework maintains manageable complexity
Solution Approach 2:
The primary cell beam acts as an intermediary that mediates between the network's beam management intentions and the UE's measurement activities. The spatial indication from the primary cell beam provides indirect guidance to the secondary cell beam selection, reducing the need for exhaustive measurements while maintaining systematic control over the beam association process
2Reliability
If the UE measures all beams from secondary cell, then connection reliability is improved, but measurement time and power consumption increase
Solution Approach 1:
Instead of uniformly measuring all secondary cell beams, the UE applies local quality optimization by measuring only those beams that are spatially correlated with the primary cell's active beam. The beam subset is selectively identified based on spatial direction information, ensuring that measurements are concentrated on the most relevant beams for maintaining reliable connection while reducing overall measurement time
Solution Approach 2:
The UE performs partial measurement action by measuring a subset of secondary cell beams rather than all beams. The spatial indication from the primary cell allows the UE to measure only the necessary portion of beams that are likely to provide reliable connection, avoiding excessive measurements on beams that would not contribute significantly to connection reliability
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may communicate, with a primary cell, one or more signals using a first beam that is associated with a first spatial direction. The UE may measure a subset of beams from a set of beams associated with a secondary cell, wherein the subset of beams is selected based at least in part on the first beam or the first spatial direction. The UE may establish a connection with the secondary cell using a second beam from the subset of beams based at least in part on the measurements of the subset of beams. Numerous other aspects are described.