UE Beam Correspondence Capability Determination via 3 dB EIRP Tolerance
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Solution Overview
Problem
The accuracy of beam correspondence in 5G mobile communication systems is unclear, specifically regarding the beam correspondence tolerance requirement for user equipment (UE) to determine its capability in supporting beam correspondence.
Innovation Solution
The UE transmits capability information to a base station, including information on its ability to support beam correspondence, determined by a beam correspondence tolerance requirement based on a delta effective isotropic radiated power (EIRP) of 3 dB, which allows for uplink beam sweeping to meet the tolerance requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam correspondence tolerance requirement is not clearly defined, then UE capability determination is ambiguous, but communication efficiency is reduced
Solution Approach 1:
The patent applies parameter changes by establishing a specific quantitative threshold (delta EIRP of 3 dB) for beam correspondence tolerance. This transforms the ambiguous concept of beam correspondence accuracy into a measurable parameter that can be objectively evaluated, allowing UEs to clearly determine their capability while enabling efficient network operation.
2Reliability
If delta EIRP threshold is set at 3 dB for beam correspondence, then UE capability can be clearly determined, but beam alignment flexibility is reduced
Solution Approach 1:
The patent establishes a specific parameter threshold (delta EIRP of 3 dB) that transforms the abstract concept of beam correspondence into a measurable and determinable criterion. This quantitative parameter allows reliable UE capability determination while the patent acknowledges that UEs may use different measurement methodologies to achieve compliance with this threshold.
Solution Approach 2:
The patent introduces dynamic elements by allowing UEs to perform uplink beam sweeping and adjust their transmission beams based on measured downlink beam characteristics. The system can adaptively determine whether a UE meets the beam correspondence requirement through dynamic measurements rather than static configuration.
3Measurement precision
If uplink beam sweeping is performed to meet beam correspondence tolerance, then beam alignment accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by having the network configure downlink beam measurements before uplink transmission. The UE performs beam correspondence determination based on pre-configured downlink beam information, which reduces the need for extensive uplink beam sweeping and associated signaling overhead while maintaining beam alignment accuracy.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports its beam correspondence capability and measured downlink beam information to the network. This feedback allows the network to make informed decisions about uplink resource allocation and beam configuration, reducing unnecessary beam sweeping operations and signaling overhead.
Data Source
AI summary
There is provided for supporting beam correspondence. The method may be performed by a user equipment (UE) and comprise: transmitting UE capability information to a base station. The UE capability information may include first information related a capability of supporting beam correspondence. The beam correspondence may be determined based on at least a beam correspondence tolerance requirement. The beam correspondence tolerance requirement may include a delta effective isotropic radiated power (EIRP) of 3 dB.