Sidelink Beam Feedback Mapping for Initial Beam Pairing
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Solution Overview
Problem
In sidelink communication systems, determining optimal beam pairs for initial beam pairing is challenging due to the need for resource allocation and power consumption in beam scanning, especially in high frequency bands like millimeter-wave bands, which affects the establishment of unicast or multicast links and inefficient utilization of time-frequency resources.
Innovation Solution
A method and apparatus for sidelink communication where a first terminal device determines a transmission beam and transmits beam feedback to a second terminal device based on a mapping relationship between resources and transmission beams, enabling the second terminal device to determine the optimal beam for pairing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam scanning is performed based on large-scale antenna arrays in high frequency bands, then system coverage is achieved, but time-space resources are consumed and power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring mapping relationships between resources and transmission beams before actual beam pairing occurs. The first information indicating the mapping relationship between resources and transmission beams is configured in advance, allowing terminal devices to quickly determine beam feedback resources without performing exhaustive beam scanning, thus reducing power consumption while maintaining coverage reliability.
2Reliability
If beam scanning is performed based on large-scale antenna arrays, then system coverage is achieved, but time-space resources are consumed
Solution Approach 1:
The mapping relationship between resources and transmission beams is pre-configured through first information, enabling terminal devices to directly determine beam feedback resources without time-consuming beam scanning processes. This preliminary configuration significantly reduces the time-space resources required while maintaining system coverage.
3Ease of operation
If terminal devices perform initial beam pairing without resource mapping information, then beam pairing can be attempted, but resource determination for beam feedback becomes difficult
Solution Approach 1:
The patent introduces first information as an intermediary that carries mapping relationship information between resources and transmission beams. This intermediary enables terminal devices to easily determine beam feedback resources by providing the necessary mapping information, thereby simplifying the resource determination process while maintaining beam pairing capability.
4Ease of operation
If mapping relationship information is provided for resource determination, then beam feedback resource determination is simplified, but information configuration overhead increases
Solution Approach 1:
The first information carrying mapping relationships serves multiple functions simultaneously: it enables resource determination for beam feedback, supports initial beam pairing, and provides a framework for subsequent beam management. This multi-functionality reduces the need for separate configuration messages, thereby minimizing information overhead while maintaining ease of resource determination.
Data Source
AI summary
A method and apparatus for sidelink communication are provided. One example method includes: determining, by a first terminal device, a first transmission beam from a plurality of transmission beams of a second terminal device, the first transmission beam being configured for initial beam pairing between the first terminal device and the second terminal device; and transmitting, by the first terminal device, beam feedback to the second terminal device over a first resource, the first resource being determined according to first information, the first information indicates a mapping relationship between a plurality of resources including the first resource and the plurality of transmission beams.