Sidelink Feedback Timing for Lower Latency and Resource Use
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved sidelink feedback timing mechanisms in wireless communication systems to reduce latency and conserve processing and signaling resources, particularly in scenarios involving multi-stage grants and relaying communications.
Innovation Solution
Implementing a method where wireless communication devices transmit feedback messages after a determined time period following the receipt of sidelink communications, considering factors such as the type of feedback message, multi-stage grants, and relaying operations, to optimize timing and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If feedback messages are transmitted immediately after receiving sidelink communications, then latency is reduced, but processing resources and signaling resources are consumed excessively
Solution Approach 1:
The patent implements dynamic feedback timing where the time period between receiving sidelink communication and transmitting feedback is adjusted based on communication type (unicast/groupcast), grant stage (first/second stage), and relay involvement. This dynamic adaptation allows the system to optimize between latency reduction and resource conservation by transmitting feedback only when necessary and at appropriate times, rather than immediately for all communications.
2Productivity
If feedback timing is optimized for different communication types, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of feedback timing based on communication conditions. Specifically, it adjusts the time period for feedback transmission according to: (1) communication type (unicast vs. groupcast), (2) grant stage (first stage vs. second stage multi-stage grants), and (3) whether relay communication is involved. This parameter-based approach enables efficient communication across different scenarios while managing complexity through standardized adjustment rules rather than complex decision logic.
3Reliability
If feedback is transmitted for all sidelink communications, then reliability is improved, but signaling resources are wasted
Solution Approach 1:
The patent applies partial action by transmitting feedback messages only for specific sidelink communications rather than all communications. It selectively transmits feedback based on: (1) unicast communications where reliability is critical, (2) specific stages of multi-stage grants, and (3) communications where the receiving device is directly involved. This selective feedback approach maintains necessary reliability while avoiding wasteful signaling resource consumption for communications where feedback is not critical.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive a sidelink communication on a sidelink. The sidelink communication may include at least one of a grant, data received on a resource identified by the grant, a multi-stage grant, a multi-packet grant, or a relaying communication. The wireless communication device may transmit, on the sidelink after a time period since receiving the sidelink communication, a feedback message acknowledging receiving the sidelink communication. Numerous other aspects are provided.