Sidelink Resource Allocation for 5G V2X Consistent Power Reception
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Solution Overview
Problem
In 5G NR V2x technology, the configuration of Physical Sidelink Feedback Channel (PSFCH) resources is challenging due to inconsistent power reception and switching times between transmission and reception directions, affecting receiving performance and service quality.
Innovation Solution
The method involves dividing time-frequency resources for sidelink communication into forward and reverse time-frequency resources using time division multiplexing, where the forward resource is used for user data and control information, and the reverse resource is used for feedback information, ensuring consistent power reception and improved receiving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time-frequency resources are shared between forward and reverse directions without time division multiplexing, then resource utilization is high, but power reception becomes inconsistent and receiving performance deteriorates
Solution Approach 1:
The patent segments the time-frequency resources by introducing a time division multiplexing structure that separates forward and reverse transmission directions into distinct time slots. This segmentation resolves the conflict by allocating specific time periods for forward transmission and specific time periods for reverse transmission, thereby ensuring consistent power reception in each direction while maintaining overall resource utilization through efficient time slot allocation.
2Adaptability or versatility
If switching time between transmission and reception directions is not controlled, then resource allocation is flexible, but inconsistent switching times affect service quality
Solution Approach 1:
The patent applies preliminary action by pre-configuring time division multiplexing patterns and switching timelines before actual transmission occurs. The base station determines and notifies UEs of the switching time requirements in advance, allowing UEs to prepare for direction switching at predetermined moments. This preliminary setup ensures consistent switching times while preserving resource allocation flexibility through configurable time slot structures.
Data Source
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AI summary
The present invention relates to a resource allocation method and apparatus. The method comprises: receiving resource allocation indication information sent by a base station, or acquiring pre-configured resource allocation indication information, wherein the resource allocation indication information is used for characterizing time domain resources occupied by a forward time-frequency resource and/or time domain resources occupied by a reverse time-frequency resource for direct communication in a target time unit, and the forward time-frequency resource is used for transmitting user data and control information, and the reverse time-frequency resource is used for transmitting feedback information from a user data receiving device to a user data sending device; and determining, according to the resource allocation indication information, a time domain resource occupied by the forward time-frequency resource and/or a time domain resource occupied by the reverse time-frequency resource. According to the technical solution, the problem of received power at different time symbols being inconsistent in a transmission process due to inconsistent switching times of the forward transmission and the reverse transmission of different users can be avoided, the receiving performance of the device is improved, and the service quality is enhanced.