Sidelink Carrier Selection via Destination Hashing
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Solution Overview
Problem
In wireless communication systems, particularly for V2X sidelink communication, existing technologies face challenges in efficiently selecting and managing multiple carriers for carrier aggregation, leading to increased burden on transmitting UEs and higher power consumption for receiving UEs, as they need to configure and receive on multiple carriers simultaneously.
Innovation Solution
A method where the network indicates aggregated carriers or resource pools to the UE based on specific conditions such as UE capability, identity, and congestion levels, allowing the UE to select optimal carriers for sidelink communication, thereby reducing the burden and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple carriers are configured for carrier aggregation in sidelink communication, then the capacity and reliability of sidelink transmission are improved, but the complexity of carrier selection and the power consumption of receiving UEs increase
Solution Approach 1:
The transmitting UE autonomously selects carriers from the aggregated set based on destination ID without requiring network intervention or complex coordination with receiving UEs. This self-service mechanism simplifies the overall system complexity while maintaining multi-carrier reliability benefits
Solution Approach 2:
The patent changes the selection parameter from complex multi-carrier configuration management to a simple hash function of destination ID. This parameter transformation converts a complex selection problem into a deterministic, simple calculation that scales well with the number of carriers
2Reliability
If multiple carriers are configured for carrier aggregation in sidelink communication, then the capacity and reliability of sidelink transmission are improved, but the power consumption of receiving UEs increases
Solution Approach 1:
The patent extracts only the necessary carrier information (single carrier identification) from the aggregated set based on destination ID, so receiving UEs only need to monitor the selected carrier rather than all aggregated carriers. This extraction principle reduces power consumption by eliminating unnecessary monitoring of other carriers
Solution Approach 2:
The carrier selection is predetermined by the hash function of destination ID, allowing receiving UEs to know in advance which carrier to monitor for specific destinations. This preliminary determination eliminates the need for dynamic carrier switching or monitoring multiple carriers simultaneously
3Adaptability or versatility
If transmitting UEs autonomously select carriers from aggregated sets, then the flexibility and adaptability of sidelink communication are improved, but the configuration management burden increases
Solution Approach 1:
The patent uses a hash function to copy the destination ID into a carrier index, creating a deterministic mapping without requiring complex configuration management. This copying mechanism provides flexibility while keeping configuration simple through mathematical transformation rather than manual configuration
Data Source
AI summary
A method and apparatus for selecting a carrier for a sidelink communication in a wireless communication system is provided. A user equipment (UE) receives an indication of an aggregated set of carriers among multiple carriers from the network. The aggregated set of carriers may be aggregated based on a destination of the sidelink communication. The UE selects a carrier among the aggregated set of carriers, selects a resource of the selected carrier, and performs the sidelink communication by using the selected resource of the selected carrier.