DCI Resource Scheduling for Multi-Device Coordination
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Solution Overview
Problem
Current CoMP technologies cannot effectively schedule resources for multiple coordinated network devices serving a terminal, leading to inefficiencies in data transmission and increased signaling overheads.
Innovation Solution
A data transmission method that involves receiving first and second indication information by a terminal to determine resource groups corresponding to antenna ports or codewords, using quasi-co-location (QCL) configuration information to schedule resources efficiently, thereby reducing signaling overheads and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single piece of DCI is used to indicate resources, then signaling overhead is reduced, but the system cannot support multiple coordinated network devices serving a terminal
Solution Approach 1:
The patent segments the resource indication into multiple resource block assignment fields within a single DCI message. Each RA field corresponds to a specific network device or transmission point, allowing the DCI to simultaneously indicate resources for multiple coordinated network devices. This segmentation enables the system to support multi-device coordinated transmission while maintaining a single DCI structure, thus reducing signaling overhead compared to using separate DCI messages for each device.
2Ease of operation
If multiple pieces of DCI are used to schedule resources for each network device, then each network device can be scheduled independently, but signaling overhead increases
Solution Approach 1:
The patent merges multiple resource indication functions into a single DCI message by including multiple RA fields. Each RA field maintains independent scheduling capability for its corresponding network device, while the overall structure is consolidated into one DCI transmission. This merging approach preserves the ease of independent scheduling operation while significantly reducing signaling overhead compared to transmitting separate DCI messages for each network device.
3Device complexity
If the DCI design supports only single-point network device serving, then the DCI structure remains simple, but it cannot meet the requirements of coordinated scenarios with multiple network devices
Solution Approach 1:
The patent enhances the DCI structure to serve multiple functions simultaneously. The same DCI message format can be used for both single-point and multi-point coordinated transmission scenarios by configuring an appropriate number of RA fields. This universal DCI design maintains relative structural simplicity while gaining the adaptability to support various coordination scenarios, including joint transmission and coordinated scheduling with multiple network devices.
Data Source
AI summary
This application provides a data transmission method, a terminal, and a network device. The method includes: receiving, by a terminal, first indication information and second indication information, where the first indication information is used to indicate at least one group of resources, the at least one group of resources corresponds to at least one group of antenna ports or at least one group of codewords, the second indication information is used to indicate the at least one group of codewords and QCL configuration information of the at least one group of antenna ports, or the second indication information is used to indicate the at least one group of antenna ports and QCL configuration information of the at least one group of antenna ports; and determining, by the terminal, the at least one group of resources based on the first indication information and the second indication information.