Sidelink Feedback Resource Allocation in 5G Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing device-to-device feedback transmission, particularly in next-generation networks like 5G, where high data throughput and low latency are required for services like voice over IP and multimedia, and existing methods do not effectively optimize sidelink feedback resources.
Innovation Solution
A method and apparatus are introduced where a first device, configured with a sidelink resource pool, receives sidelink data transmission, generates feedback information, and determines a sidelink feedback resource within the pool, allowing for non-overlapping frequency regions in the frequency domain but full overlap in the time domain, enabling efficient sidelink feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple frequency regions of sidelink feedback transmission are allocated in one TTI, then feedback transmission capacity is improved, but resource allocation complexity increases
Solution Approach 1:
The feedback transmission resources are segmented into multiple non-overlapping frequency regions within a single TTI. Each frequency region can independently carry feedback information, allowing parallel feedback transmission without interfering with each other. This segmentation enables the system to handle multiple feedback streams simultaneously, improving overall feedback transmission capacity while maintaining manageable resource allocation through structured frequency division.
2Productivity
If feedback resources are allocated across multiple TTIs, then resource utilization is improved, but transmission latency increases
Solution Approach 1:
The system pre-allocates multiple frequency regions for feedback transmission within a single TTI before actual feedback data needs to be transmitted. This preliminary setup of multiple available frequency regions allows immediate feedback transmission when data becomes available, eliminating the need to wait for resources to become available in subsequent TTIs. The pre-configured frequency regions enable instant resource utilization while maintaining low latency.
3Productivity
If frequency regions overlap in time domain, then resource efficiency is improved, but interference between feedback transmissions increases
Solution Approach 1:
Different frequency regions are assigned distinct local characteristics in the frequency domain, making them non-overlapping in frequency while maintaining time-domain overlap capability. Each frequency region operates independently with its own resource allocation, allowing simultaneous feedback transmissions without interference. The local quality differentiation in frequency domain prevents harmful interactions while maximizing resource efficiency through time-domain multiplexing.
Data Source
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AI summary
A method and apparatus are disclosed from the perspective of a first device, wherein the first device is configured with a sidelink resource pool comprising a frequency region of sidelink data transmission and multiple frequency regions of sidelink feedback transmission, wherein the multiple frequency regions of sidelink feedback transmission in one TTI (Transmission Time Interval) are separately associated with the one frequency region of sidelink data transmission in multiple TTIs, and wherein the multiple frequency regions of sidelink feedback transmission in the one TTI are non-overlapped with each other in frequency domain and fully overlapped in time domain (2305). Preferably, the method includes the first device receiving a sidelink data transmission from a second device within the frequency region of sidelink data transmission in a first TTI (2310). The method further includes the first device generating a feedback information associated with the sidelink data transmission (2315). The method also includes the first device determining or deriving a sidelink feedback resource within one frequency region of sidelink feedback transmission among the multiple frequency regions of sidelink feedback transmission, wherein the one frequency region of sidelink feedback transmission is determined or derived based on association with the first TTI (2320). In addition, the method includes the first device performing a sidelink feedback transmission for delivering the feedback information to the second device on the sidelink feedback resource (2325).