Cross-Band RB Scheduling to Reduce Control Resource Overhead
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Solution Overview
Problem
Existing communication methods result in high control resource overheads due to the need for multiple pieces of scheduling information when a terminal device is covered by multiple component carriers, leading to inefficient use of air interface resources.
Innovation Solution
A communication method that configures a terminal device with multiple frequency bands, allowing a single piece of scheduling information to schedule data transmission across these bands by utilizing common resource block deviations and synchronized subcarrier spacing and cyclic prefixes, thereby reducing the need for excessive control resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pieces of scheduling information are transmitted to schedule data transmission on multiple frequency bands, then data transmission capability is improved, but control resource overheads increase
Solution Approach 1:
The patent merges multiple scheduling information pieces into a single scheduling information that can schedule data transmission on multiple frequency bands simultaneously. This is achieved by defining a mapping relationship between resource blocks on different frequency bands and using a unified scheduling mechanism that references this mapping, thereby reducing the quantity of control resources needed while maintaining the ability to transmit data across multiple bands.
Solution Approach 2:
The scheduling information is designed with multi-functionality to perform multiple scheduling tasks simultaneously. A single piece of scheduling information can indicate resource blocks on different frequency bands through the mapping relationship, making the scheduling mechanism universal and capable of handling multiple frequency bands without requiring separate scheduling information for each band.
2Adaptability or versatility
If multiple pieces of scheduling information are used to cover multiple component carriers, then frequency coverage is improved, but air interface resources are wasted
Solution Approach 1:
The patent combines multiple scheduling information pieces into one unified scheduling information that can cover multiple component carriers. By establishing a mapping relationship between resource blocks on different frequency bands and using this mapping in the scheduling information, the system achieves comprehensive frequency coverage while minimizing the number of control signals transmitted over the air interface.
Solution Approach 2:
The patent extracts the essential scheduling function from multiple separate scheduling information pieces and consolidates it into a single scheduling information structure. This extraction process removes redundant control signals while preserving the ability to schedule data transmission across multiple frequency bands, thereby reducing air interface resource consumption.
Data Source
AI summary
A communication method is disclosed. According to the communication method, a terminal device receives configuration information from a network device. The configuration information is used to configure at least two frequency bands for the terminal device, and the at least two frequency bands include a first frequency band and a second frequency band. The terminal device receives first scheduling information from the network device. The first scheduling information indicates a target resource block (RB) for data transmission. The terminal device performs data transmission with the network device on a same symbol by using a first RB on the first frequency band and a second RB on the second frequency band. There is a common resource block (CRB) deviation between the first RB and the second RB, and the target RB includes the first RB or the second RB.