Beambook Segmentation for 5G Base Station Power Optimization
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Solution Overview
Problem
Current 5G communication systems face challenges in maintaining signal quality and reducing power consumption, particularly in heavy cell load conditions with many cell-edge UEs, due to limited beambook configurations and increased reference signal overhead.
Innovation Solution
The proposed solution involves a wireless communication method where a base station transmits a measurement reference signal only for first beams in a beambook set, determining the transmitting beam based on reference signal measurement values, and optionally configuring second or third beambook sets with varying numbers of regular and virtual beams, selected based on cell load and UE distribution, to optimize beam selection and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement reference signals are configured for all beams in the beambook set, then beam selection accuracy is improved, but reference signal overhead and power consumption increase
Solution Approach 1:
The beambook set is divided into two categories: first beams (requiring measurement reference signals) and second beams (without measurement reference signals). This segmentation allows the system to reduce reference signal overhead while maintaining beam selection accuracy by only configuring measurement signals for a subset of beams.
Solution Approach 2:
Instead of configuring measurement reference signals for all beams in the beambook set, the patent applies partial action by only configuring them for first beams. This reduces power consumption and reference signal overhead while still enabling accurate beam selection through the deterministic mapping of second beams to first beams.
2Reliability
If the beambook set includes more beams to cover cell-edge UEs, then signal quality for cell-edge UEs is improved, but reference signal overhead increases
Solution Approach 1:
The beambook set is segmented into first beams with measurement reference signals and second beams without them. This allows the system to include more beams in the beambook set to cover cell-edge UEs while avoiding the proportional increase in reference signal overhead, since only first beams require measurement signals.
Solution Approach 2:
A deterministic mapping relationship acts as an intermediary between second beams (without measurement signals) and first beams (with measurement signals). This mapping enables the system to provide coverage for cell-edge UEs using second beams while relying on the measurement results of mapped first beams, thus reducing reference signal overhead.
3Measurement precision
If all beams in the beambook set are configured with measurement reference signals, then measurement coverage is improved, but device complexity increases
Solution Approach 1:
The beambook set is divided into first beams and second beams with different configuration requirements. This segmentation reduces device complexity by eliminating the need to configure measurement reference signals for all beams, while maintaining measurement coverage through the deterministic mapping relationship.
Solution Approach 2:
The deterministic mapping relationship provides a universal mechanism that applies to all second beams, enabling them to leverage measurement results from mapped first beams without requiring separate measurement configurations. This multi-functional approach simplifies the overall system configuration.
Data Source
AI summary
A method performed by a base station, comprises transmitting a reference signal associated with a first beam in a beambook to a user equipment (UE), wherein the beambook comprises a first beam set including the first beam and a second beam set. The method comprises determining a transmitting beam of the first beam set and the second beam set based on measurement information including received power value of the reference signal received from the UE. The method comprises determining index of the first beam corresponding to the transmitting beam in case that the transmitting beam is a second beam included in the second beam set. The method comprises transmitting beam information including the index to the UE. The first beam is configured to measure the received power value. A signal transmitted using the first beam and a signal transmitted using the second beam are received using a receiving beam of the UE.