Wireless Communication Channel Scheduling Gap and Resource Segmentation
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Solution Overview
Problem
In wireless communication, especially for Machine-Type Communication (MTC), existing methods face challenges in ensuring effective channel coverage and avoiding resource collisions during repeated transmission/reception of channels in HARQ processes, particularly due to ambiguity in repetition numbers and overlapping time-frequency resources.
Innovation Solution
The method involves defining a gap between the starting subframes of different channels and using distinct time-frequency resources in HARQ processes, ensuring that the number of subframes reserved for each channel in one HARQ process aligns with the Round Trip Time and the maximum number of HARQ processes, thereby avoiding resource collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel repetitions are transmitted in multiple subframes to improve coverage, then channel coverage is improved, but resource collision among different HARQ processes occurs
Solution Approach 1:
The patent segments the time-frequency resources by introducing a gap parameter between starting subframes of different channels and allocating distinct time-frequency resources to different HARQ processes. This segmentation prevents resource collision while maintaining repeated transmission for coverage enhancement.
Solution Approach 2:
The patent resolves resource collision by utilizing additional resource dimensions (time gap and frequency separation) beyond simple time multiplexing. By defining gaps in the time domain and allocating different time-frequency resources, the system accommodates multiple HARQ processes without collision.
2Adaptability or versatility
If the starting subframe of the second channel is determined based on the repetition number of the first channel, then channel scheduling flexibility is improved, but ambiguity arises when repetition numbers are uncertain
Solution Approach 1:
The patent performs preliminary action by defining a fixed gap between starting subframes of different channels independent of repetition numbers. This predetermined gap eliminates ambiguity while maintaining scheduling flexibility, as the second channel's starting position is determined without needing to know the first channel's repetition count.
3Productivity
If multiple HARQ processes share the same time-frequency resources, then resource utilization efficiency is improved, but resource collision occurs leading to transmission errors
Solution Approach 1:
The patent segments time-frequency resources among multiple HARQ processes by introducing gap parameters and allocating distinct resources. This segmentation maintains high resource utilization while preventing collisions that would cause transmission errors.
Solution Approach 2:
The patent applies local quality by allocating different time-frequency resource characteristics to different HARQ processes. Each process receives appropriately separated resources tailored to avoid collision, optimizing both utilization and reliability.
Data Source
AI summary
The present disclosure provides wireless communication methods for repeated transmission of channels, and wireless communication devices therefor. In one embodiment, the gap between the starting subframe of a first channel and the starting subframe of a second channel is defined or configured. In another embodiment, Mx*W=M and Mx*n=N is satisfied, where Mx is the number of subframes reserved for the channel in one HARQ process, M is RTT for one HARQ process, W is a positive integer and represents the maximum number of HARQ processes transmitting the channel within M subframes, N is the gap between the starting subframes of the channel in two HARQ processes, and n is a positive integer. In yet another embodiment, time-frequency resources for the channel in different HARQ processes are different.