Sidelink Beam Coordination via Reservation Information
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially in sidelink communications, interference from one user equipment (UE) to another can degrade reception quality and increase latency due to uncoordinated beam usage, leading to inefficient use of signaling resources.
Innovation Solution
A method where a first UE receives reservation information about a transmit beam from a second UE and selects a paired receive beam, then transmits information to a third UE to avoid using beam resources associated with this paired receive beam, thereby minimizing interference and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If UEs use beamforming for sidelink communications without coordination, then communication coverage and signal strength are improved, but interference between UEs increases and reception quality deteriorates
Solution Approach 1:
The patent applies preliminary action by having transmitting UEs send reservation information in advance before actual data transmission. This reservation information includes beam direction and timing details, allowing receiving UEs to pre-configure their receive beams and other UEs to avoid interfering beams, thereby preventing interference before it occurs rather than reacting to it afterward
Solution Approach 2:
The patent implements feedback mechanisms where UEs exchange reservation information and beam selection details. The receiving UE provides feedback about its selected receive beam and the transmitting UE adjusts its transmission accordingly. This closed-loop feedback ensures coordinated beam usage and minimizes interference between multiple UEs
2Device complexity
If UEs independently select beams without reservation information exchange, then device complexity is reduced, but communication reliability and reception quality worsen
Solution Approach 1:
The patent merges the beam selection process with the reservation information exchange mechanism. Instead of independent beam selection, UEs combine beam selection with reservation signaling, where the reservation information carries beam direction and timing details. This integration ensures that beam selection is coordinated across multiple UEs, improving reception quality while maintaining manageable complexity through standardized reservation information formats
3Quantity of substance
If reservation information is not transmitted to third UEs, then signaling overhead is reduced, but interference management and resource utilization efficiency worsen
Solution Approach 1:
The patent applies universality by designing reservation information to serve multiple functions simultaneously. The same reservation information message is used to: (1) reserve beam resources for the transmitting-receiving pair, (2) notify other UEs of the reserved beams so they can avoid interference, and (3) enable coordinated resource allocation across multiple links. This multi-functional approach improves resource utilization efficiency without proportionally increasing signaling overhead
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE, first reservation information that indicates a transmit beam that is reserved for communications from the second UE. The first UE may select a receive beam that is paired with the transmit beam. Numerous other aspects are described.