Sidelink Discovery Resource Allocation for Initial Beam Pairing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating discovery resources for initial beam pairing and beamforming in sidelink communication, particularly in mmWave-based device-to-device (D2D) communication, leading to potential resource collisions and inefficiencies.
Innovation Solution
A method and apparatus for configuring discovery resources by transmitting and receiving messages using multiple transmit and receive beams, with a one-to-one mapping, and employing beam alignment to optimize resource allocation in sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmit beams and receive beams are used for initial beam pairing in sidelink communication, then beamforming capability and communication reliability are improved, but resource allocation complexity and potential resource collisions increase
Solution Approach 1:
The discovery period is segmented into multiple slots, with each slot dedicated to specific beam pairing operations. The resource pool is divided into multiple discovery resources, where each resource corresponds to a specific transmit beam and receive beam combination. This segmentation allows systematic management of multiple beams without overwhelming resource allocation complexity.
Solution Approach 2:
Beam pairing is performed in advance during a discovery period before actual data transmission. The terminals pre-establish beam relationships by transmitting and receiving discovery messages using different beam combinations. This preliminary beam alignment eliminates the need for complex real-time beam management during data transmission, reducing resource allocation complexity while maintaining communication reliability.
2Measurement precision
If beam sweeping is performed to establish initial beam pairing, then beam alignment accuracy is improved, but time consumption and discovery period duration increase
Solution Approach 1:
Beam sweeping is performed periodically within the discovery period, with each terminal transmitting discovery messages using different transmit beams in different slots. The receiving terminal similarly sweeps through different receive beams. This periodic beam sweeping establishes accurate beam alignment while confining the time consumption to structured intervals rather than continuous operation.
Solution Approach 2:
Beam alignment is accomplished in advance during the discovery period through systematic beam sweeping. Once the optimal transmit and receive beam pairs are identified, these beam configurations are reused for subsequent data transmission without requiring repeated beam sweeping. This preliminary action achieves high beam alignment accuracy while limiting time consumption to the initial discovery phase.
Data Source
AI summary
A method of performing an initial beam configuration by a first terminal in a wireless communication system may comprise transmitting a discovery message based on a plurality of transmit beams in a first period of a discovery period, receiving a response message from a second terminal based on a plurality of receive beams in a second period of the discovery period, and performing beam alignment with the second terminal based on the response message. The plurality transmit beams and the plurality of receive beams may be mapped one-to-one.