Group Common DCI Scheduling for Base Stations
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Solution Overview
Problem
In communication systems, the increased number of terminals to be scheduled leads to a higher collision probability of downlink control channels (PDCCHs), resulting in increased scheduling delay and reduced system performance, especially for services requiring high reliability and low latency.
Innovation Solution
A scheduling method that combines high-layer signaling pre-configuration with group common downlink control channels, where the base station configures and notifies terminals of scheduling information through UE-specific bit fields in the downlink control information (DCI), reducing resource overhead and collision probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast data of different terminals is scheduled through different DCIs carried through different PDCCH candidates, then each terminal can receive its scheduling information, but the collision probability of PDCCHs increases when the number of terminals is large
Solution Approach 1:
The patent merges the scheduling information of multiple terminals into a single group common DCI message. Instead of sending separate DCIs to each terminal, the base station consolidates scheduling information for multiple terminals into one DCI that is broadcast to a group of terminals. This reduces the number of PDCCH transmissions needed, thereby reducing collision probability and scheduling delay while maintaining reliable delivery of scheduling information to all terminals in the group.
2Reliability
If transmission with larger aggregation level is used to ensure more robust PDCCH transmission, then PDCCH reliability is improved, but collision probability increases
Solution Approach 1:
The patent combines scheduling information for multiple terminals into a single group common DCI, reducing the total number of PDCCH transmissions required. This reduction in the number of PDCCH messages decreases the overall collision probability in the system, allowing for more efficient scheduling without requiring excessively large aggregation levels for every individual terminal, thus reducing scheduling delay.
3Ease of operation
If complete scheduling information is included in each DCI, then each terminal can independently receive and execute scheduling, but resource overhead of downlink control channels increases
Solution Approach 1:
The patent segments scheduling information into two parts: common scheduling information that applies to a group of terminals (included in the group common DCI) and terminal-specific information (that can be derived or configured separately). This segmentation allows the group common DCI to carry scheduling information for multiple terminals efficiently without duplicating common parameters for each terminal, thereby reducing downlink control channel resource overhead while maintaining the ability of each terminal to independently execute its scheduling.
4Productivity
If the number of PDCCH candidates is increased to schedule more terminals simultaneously, then more terminals can be scheduled, but PDCCH collision probability increases
Solution Approach 1:
The patent merges scheduling information for multiple terminals into a single group common DCI message that is transmitted on one PDCCH candidate. This approach allows the base station to schedule multiple terminals simultaneously through a single PDCCH transmission, thereby increasing terminal scheduling capacity without proportionally increasing the number of PDCCH candidates and avoiding the associated collision probability increase.
Data Source
AI summary
The invention provides a scheduling method, a scheduling apparatus, a base station, a terminal and a computer readable storage medium. The scheduling method includes: scheduling data transmission of at least one terminal through downlink control information by means of combining high layer signaling pre-configuration and group common downlink control channels.