Sidelink Resource Indication Broadcast for UE Interference Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently broadcasting and managing sidelink resource indications, leading to potential interference and reduced communication reliability in sidelink channels.
Innovation Solution
A method where a first user equipment (UE) receives sidelink resource indications from a second UE, senses the sidelink channel, and selects candidate sidelink resources available for a fourth UE to use for transmission to the first UE, then broadcasts these selections to the fourth UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs continuously sense and monitor sidelink channels to select available resources, then communication reliability is improved, but power consumption and processing resources are increased
Solution Approach 1:
The patent applies preliminary action by having UEs perform channel sensing and resource selection in advance before actual communication occurs. The first UE senses the sidelink channel and selects candidate resources ahead of time, then broadcasts this information. This allows the second UE to make informed resource selection decisions without needing to continuously sense and monitor the channel in real-time, thereby reducing ongoing power consumption while maintaining communication reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism where the first UE acts as a mediator by broadcasting sensed channel information and selected candidate resources to other UEs. This intermediary broadcast message allows receiving UEs to utilize the sensing results without directly performing continuous sensing operations themselves, reducing their individual power consumption while still achieving reliable resource selection through the shared information.
2Productivity
If UEs broadcast detailed channel sensing information to all nearby UEs, then resource management efficiency is improved, but message size and processing burden are increased
Solution Approach 1:
The patent applies the extraction principle by selectively extracting only the most critical information from the complete channel sensing data. Instead of broadcasting all detailed sensing results, the first UE extracts and broadcasts only the essential candidate resource indications that are most relevant for resource selection. This reduces the message size while still providing sufficient information for efficient resource management and avoiding collisions.
Solution Approach 2:
The patent employs partial action by providing only the necessary level of detail in the broadcast message. The first UE performs comprehensive sensing but then selectively shares only the candidate resources that meet certain criteria, rather than broadcasting all possible sensing data. This partial information approach reduces message size and processing burden while maintaining adequate resource management efficiency.
3Object-affected harmful factors
If UEs perform comprehensive channel sensing and resource selection, then interference reduction is improved, but processing time and computational resources are increased
Solution Approach 1:
The patent applies preliminary action by performing comprehensive channel sensing and resource selection in advance before actual communication occurs. The first UE completes its sensing and candidate resource identification beforehand, then broadcasts this pre-computed information. This eliminates the need for receiving UEs to perform time-consuming sensing operations in real-time, reducing overall processing time while still achieving effective interference reduction through thorough preliminary sensing.
Solution Approach 2:
The patent uses an intermediary broadcast mechanism where the first UE's pre-computed resource indications are shared with other UEs. This intermediary approach allows comprehensive interference analysis to be performed once by the first UE, and the results are then reused by other UEs without requiring each of them to perform the full sensing and analysis process, thereby reducing total processing time and computational resources.
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, in a first broadcast message from a second UE, an indication of one or more sidelink resources in a resource selection window of a sidelink channel that are available for transmission by the second UE to a third UE. The UE may sense the sidelink channel. The UE may select one or more candidate sidelink resources that are available for a fourth UE to use for transmission to the first UE based at least in part on the indication in the broadcast message and the sensing of the sidelink channel. The UE may transmit, to the fourth UE in a second broadcast message, an indication of the candidate sidelink resources that are available for the fourth UE. Numerous other aspects are described.