Two-Level Scheduling for Cooperative Uplink Data Transmission
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Solution Overview
Problem
Existing wireless communication systems lack a feasible solution for effectively indicating user equipment to perform cooperative transmission in a next-generation communication system, particularly in uplink transmission processes involving user cooperation, which affects transmission efficiency and reliability.
Innovation Solution
A network device uses two independent downlink control channels to send first and second downlink control information to terminal devices, employing a two-level scheduling manner to adjust transmission configurations based on the status of the first stage, enabling flexible resource allocation in the second stage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single downlink control channel is used to indicate user equipment for cooperative transmission, then the control signaling is simple, but the transmission efficiency and reliability in the second stage cannot be improved dynamically
Solution Approach 1:
The patent segments the control signaling into two independent downlink control channels: the first downlink control channel indicates first downlink control information for the first stage (sidelink transmission), and the second downlink control channel indicates second downlink control information for the second stage (uplink transmission). This segmentation allows independent optimization of each stage's control information, enabling dynamic adjustment of transmission efficiency in the second stage without increasing overall system complexity
Solution Approach 2:
The patent introduces a new dimension in control signaling by using two independent downlink control channels instead of a single channel. This dimensional expansion allows the network device to provide separate control information for sidelink transmission and uplink transmission, enabling flexible and dynamic control of the second stage transmission based on first stage transmission status
2Reliability
If transmission configuration in the second stage is fixed, then the control signaling is simple, but the transmission reliability cannot be adjusted based on first stage status
Solution Approach 1:
The patent implements dynamic scheduling by allowing the network device to flexibly adjust the transmission configuration in the second stage based on the transmission status in the first stage. The second downlink control information can be dynamically modified according to whether the sidelink transmission succeeded or failed, thereby optimizing transmission reliability without requiring complex pre-planned scheduling schemes
Solution Approach 2:
The patent incorporates feedback mechanisms where the network device receives feedback information from terminal devices about the transmission status in the first stage. This feedback is then used to adjust the second downlink control information, enabling the system to adapt transmission reliability dynamically based on actual transmission conditions
3Productivity
If two independent downlink control channels are used, then the transmission efficiency is improved, but the control signaling overhead increases
Solution Approach 1:
The patent applies partial action by only introducing additional control signaling when needed for the second stage uplink transmission. The first downlink control channel provides essential control information for sidelink transmission, while the second downlink control channel provides supplementary control information for uplink transmission only when the first stage transmission status requires it, thereby avoiding excessive control signaling overhead
Data Source
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AI summary
Embodiments of this application disclose a data transmission method and apparatus, and a related device, and may be used in the internet of vehicles, for example, V2X, LTE-V, or V2V, or may be used in fields such as D2D, intelligent driving, and intelligent connected vehicle. A network device may send first downlink control information to a first terminal device and a second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a first stage. After the transmission in the first stage is completed, the network device sends second downlink control information to the first terminal device and the second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a second stage. The network device uses a two-level scheduling manner to improve transmission efficiency in the second stage.