DCI Mapping for Multi-UE Scheduling in 5G
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Solution Overview
Problem
Current 5G communication systems face inefficiencies in scheduling multiple User Equipments (UEs) with existing Downlink Control Information (DCI) formats, leading to increased resource waste and overhead, particularly in Machine Type Communication (MTC) scenarios where flexible acknowledgement feedback and coverage enhancement are required.
Innovation Solution
A method and equipment that allow multiple UEs to be scheduled using a single piece of DCI by determining the scheduling information based on a mapping relationship between configured transmission resources and DCI, enabling flexible scheduling modes and reduced resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If legacy DCI format 3/3A is used for scheduling multiple UEs, then resource waste is reduced, but scheduling flexibility and adaptability are limited
Solution Approach 1:
The patent segments the scheduling information into multiple DCI formats (3/3A for power control, 6-0A/B for MTC scheduling) that can be independently selected and combined based on specific UE requirements and network conditions, allowing flexible adaptation while maintaining efficient resource utilization
Solution Approach 2:
The patent introduces dynamic scheduling where the base station can flexibly select between different DCI formats and scheduling modes (grant-based, grant-free, configured grants) based on real-time network conditions, UE capabilities, and service requirements, enabling adaptability without permanent resource allocation
2Adaptability or versatility
If DCI format 6-0A/B is used for MTC scheduling, then scheduling flexibility is improved, but scheduling overhead increases
Solution Approach 1:
The patent extracts and separates critical scheduling parameters into dedicated fields within DCI format 6-0A/B, allowing the base station to transmit only essential information for MTC scheduling while reducing overall overhead compared to using more comprehensive formats for all scheduling scenarios
Solution Approach 2:
The patent designs DCI format 6-0A/B to serve multiple functions including uplink grant allocation, downlink assignment, power control commands, and early termination signaling, allowing a single format to handle diverse MTC scheduling requirements without requiring multiple specialized formats, thus reducing overall overhead
3Loss of information
If one piece of DCI schedules multiple UEs, then scheduling overhead is reduced, but measurement precision and reliability of individual UE scheduling deteriorates
Solution Approach 1:
The patent applies local quality by including UE-specific parameters (such as UE identity, dedicated RNTI, UE-specific power control adjustments) within the group scheduling DCI, ensuring that each UE receives customized scheduling information tailored to its specific requirements while still benefiting from group-based overhead reduction
Solution Approach 2:
The patent introduces RNTI (Radio Network Temporary Identifier) as an intermediary mechanism that allows individual UEs to identify and extract their specific scheduling information from a group DCI message, enabling precise individual scheduling within a group-based overhead structure through the intermediary identifier field
Data Source
AI summary
The present invention discloses a method for receiving scheduling information, comprising steps of: receiving Downlink Control Information (DCI); and determining, according to a mapping relationship between configured transmission resources used for a Physical Uplink Shared Channel (PUSCH) and scheduling information in the DCI, scheduling information corresponding to the PUSCH in the DCI. Compared with the prior art, in the present invention, the scheduling information in the DCI is determined by the mapping relationship between the configured transmission resources used for transmitting the PUSCH by a UE and the scheduling information in the DCI, so that a base station can schedule all UEs for which there is a mapping relationship between PUSCH configured transmission resources and the scheduling information in DCI by sending only one piece of DCI. The scheduling overhead is reduced, the resource waste is reduced, and the efficiency of scheduling terminals by a communication system is significantly improved.