Sidelink Feedback Symbol Allocation in D2D Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in device-to-device (D2D) communications, face challenges in efficiently managing sidelink feedback communications without dedicated resource allocation and scheduling, which can lead to inefficiencies and interference in traffic and feedback data transmission.
Innovation Solution
Implementing a sidelink communication structure that includes at least one feedback symbol to facilitate the transmission of sidelink feedback information, allowing devices to communicate feedback without the need for network-assigned resources or scheduling, by modifying the transmission time interval (TTI) structure to include a dedicated symbol for feedback, enabling efficient non-self-contained feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated resource allocation and scheduling are used for sidelink feedback communications, then reliability of feedback transmission is improved, but device complexity and network overhead increase
Solution Approach 1:
The patent enables devices to autonomously select and use pre-configured feedback resources without requiring network scheduling. The UE independently determines which feedback symbol to use based on local configuration information, eliminating the need for complex network-assisted resource allocation while maintaining reliable feedback transmission
Solution Approach 2:
The patent pre-configures feedback resources and symbols before actual communication occurs. The network provides feedback resource configurations in advance, and devices prepare the feedback structure beforehand, allowing immediate feedback transmission without real-time scheduling decisions, thus reducing complexity while ensuring reliability
2Productivity
If dedicated feedback symbols are included in sidelink communication structure, then feedback transmission efficiency is improved, but communication structure complexity increases
Solution Approach 1:
The patent divides the feedback transmission into discrete feedback symbols within the sidelink communication structure. Each feedback symbol is independently configured and can be selectively activated, allowing efficient feedback transmission while managing complexity through modular structure segmentation
Solution Approach 2:
The patent designs the feedback symbol structure to serve multiple purposes: it can carry different types of feedback information (ACK/NACK, CSI, etc.), support both configured grant and dynamic scheduling modes, and adapt to different feedback timing requirements. This multi-functionality improves efficiency without proportionally increasing complexity
3Object-affected harmful factors
If network resource allocation is required for sidelink feedback, then interference management is improved, but communication overhead and latency increase
Solution Approach 1:
The patent pre-allocates feedback resources and configures feedback symbols before actual feedback transmission. The network provides resource configuration information in advance, and devices prepare feedback structures beforehand, enabling immediate feedback transmission without waiting for real-time network scheduling decisions, thus reducing latency while maintaining interference management through pre-planned resource allocation
Solution Approach 2:
The patent implements periodic feedback opportunities using pre-configured feedback symbols at regular intervals. This periodic structure allows devices to transmit feedback at predetermined times without requiring continuous network scheduling, reducing latency while maintaining systematic interference management through predictable transmission patterns
Data Source
AI summary
Wireless communication apparatus and methods related to wireless communication, for example, device-to-device feedback are described. In aspects, a method of wireless communication may include communicating a sidelink traffic communication using a sidelink communication structure, and communicating an allotting for sidelink feedback using at least one feedback symbol of the sidelink communication structure. In aspects, the method includes communicating, by a first wireless communication device, a sidelink feedback communication using at least one feedback symbol of the sidelink communication structure, wherein the sidelink feedback communication is associated with the sidelink traffic communication. Numerous other aspects are provided.