Beamforming Beam-State Mapping for Low-Latency Positioning
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Solution Overview
Problem
Combining positioning techniques such as multilateration and multiangulation with beamforming in wireless communications is challenging due to difficulties in selecting appropriate beams for multiple access nodes, leading to increased complexity and latency in beam management.
Innovation Solution
A method is provided for determining the state of beams at access nodes based on a predetermined mapping between the serving and neighboring nodes, allowing for efficient activation and triggering of transmissions using beamforming techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If beamforming is employed for efficient spectrum utilization, then spectral efficiency is improved, but beam management complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing beam state mappings between serving and neighboring access nodes in advance. The network node determines which beams to activate at neighboring nodes based on predetermined mappings established during initial configuration, eliminating the need for real-time beam selection decisions at each node and reducing overall system complexity.
2Measurement precision
If multiple neighboring access nodes transmit positioning reference signals on appropriate beams, then positioning accuracy is improved, but beam management latency increases
Solution Approach 1:
The patent resolves the latency issue by pre-establishing beam state mappings between serving and neighboring access nodes. When positioning reference signals need to be transmitted, the network node can immediately determine which beams to activate at neighboring nodes based on the predetermined mappings, eliminating delays associated with real-time beam selection and coordination.
3Adaptability or versatility
If beam states at multiple access nodes are independently managed, then beam configuration flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies universality by creating a unified beam state mapping mechanism that serves multiple purposes. The predetermined mappings between serving and neighboring node beams enable the network node to simultaneously manage beam configuration, reduce signaling overhead, and maintain flexibility across multiple access nodes through a single coordinated approach rather than independent management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces control signaling, power consumption, and positioning latency while maintaining accuracy by leveraging a-priori knowledge and correlations between serving and neighboring node beams.
Implementation Method 1
multiple antennas of the antenna array are operated in a phase-coherent manner to implement constructive and destructive interference for preferred and non-preferred directions, respectively
Implementation Method 2
multiple antennas of the antenna array are operated in a phase-coherent manner to implement constructive and destructive interference for preferred and non-preferred directions, respectively
Data Source
AI summary
A method of operating a network node of a network is provided. The network comprising a first access node and at least one second access node. The method includes establishing a first state of one or more first beams of a first transmission between the first access node and a mobile device. The method further includes determining whether a certain one of one or more second beams of a second transmission between the at least one second access node and the mobile device is to be activated, based on the first state and a predetermined mapping between the first state and a second state of the one or more second beams, the second transmission comprising positioning reference signals.