Narrowband IoT Scheduling Method for HARQ-ACK and Data Resource Allocation
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Solution Overview
Problem
In NB-IOT systems, the coexistence of downlink HARQ-ACK and data on the same physical layer channel poses challenges in resource allocation, leading to potential collisions and inefficient resource utilization, with existing solutions resulting in excessive signaling redundancy or waste.
Innovation Solution
A method where the base station transmits independent signaling for the time-frequency resources occupied by HARQ-ACK and data, allowing the UE to determine whether to occupy the second time-frequency resource based on its state, using orthogonal resources and reducing the need for explicit signaling, thereby improving resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station transmits two independent downlink signaling to indicate the time frequency resource occupied by the downlink HARQ-ACK and the time frequency resource occupied by the downlink data respectively, then the resource allocation flexibility is improved, but the signaling redundancy increases
Solution Approach 1:
The patent combines the indication of time frequency resources for both downlink data and downlink HARQ-ACK into a single downlink signaling. The signaling includes first indication information for downlink data resources and second indication information for HARQ-ACK resources, allowing both resource allocations to be conveyed together rather than through separate independent signaling messages.
Solution Approach 2:
The downlink signaling is designed to serve multiple functions simultaneously: it indicates both the time frequency resources for downlink data transmission and the time frequency resources for downlink HARQ-ACK transmission. This multi-functional approach eliminates the need for separate dedicated signaling for each resource type.
2Device complexity
If the downlink HARQ-ACK and downlink data are transmitted on the same physical layer channel, then the channel structure is simplified, but the resource collision risk increases
Solution Approach 1:
The patent segments the time frequency resources within the same physical layer channel by using indication information to specify distinct resource allocations for downlink data and downlink HARQ-ACK. The second indication information identifies specific resource elements or resource blocks within the broader downlink channel that are reserved for HARQ-ACK, preventing overlap with data resources.
Solution Approach 2:
The patent applies different resource allocation characteristics to different parts of the downlink channel. While the overall channel structure remains unified, specific local regions (time frequency resources) are designated with different functions - some for data and others for HARQ-ACK - based on the indication information provided in the signaling.
Data Source
AI summary
A scheduling method and device in a UE and a base station. The UE receives a first signaling and a wireless signal on a target time frequency resource. The first signaling indicates a first time frequency resource that includes a second time frequency resource. The target time frequency resource includes a time frequency resource of the first time frequency resource except the second time frequency resource. The target time and second time frequency resources are orthogonal, or the first signaling indicates whether the target time frequency resource includes the second time frequency resource. The first time frequency resource includes T1 sub frames in a time domain and P1 sub carriers in a frequency domain. The second time frequency resource includes T2 sub frames of the T1 sub frames in a time domain. The T1 and the P1 are a positive integer respectively, and the T2 is smaller than the T1.