Terminal-Mediated Data Scheduling for Coherent Joint Transmission
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Solution Overview
Problem
The challenge of implementing coherent joint transmission (CJT) between network devices in a non-ideal backhaul scenario, where high delay in backhaul links hinders the exchange of scheduling information necessary for unified coordination.
Innovation Solution
A terminal device processes initial scheduling information from multiple network devices to determine unified scheduling information, which is then sent to the network devices, ensuring coherent transmission despite non-ideal backhaul conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network devices exchange scheduling information through backhaul links, then unified scheduling for coherent joint transmission can be achieved, but high backhaul delay prevents timely information exchange
Solution Approach 1:
The terminal device acts as an intermediary that collects scheduling information from multiple network devices and distributes unified scheduling information back to them. This mediator approach allows the terminal to coordinate the scheduling without requiring direct real-time communication between network devices through the delayed backhaul links, thus achieving unified scheduling despite high backhaul delay.
Solution Approach 2:
Instead of having network devices exchange scheduling information directly through the backhaul (traditional approach), the patent inverts the information flow direction: network devices send their scheduling information to the terminal, and the terminal then distributes the unified scheduling information back to all network devices. This inversion eliminates the need for direct backhaul communication between network devices for scheduling coordination.
2Productivity
If multiple network devices transmit data jointly to improve transmission performance, then system reliability and throughput increase, but coordination complexity and scheduling difficulty increase
Solution Approach 1:
The patent merges the scheduling functions of multiple network devices into a single unified scheduling process managed by the terminal device. Instead of each network device independently scheduling transmissions (which would create coordination complexity), the terminal consolidates scheduling decisions, ensuring all network devices transmit data in a coordinated manner for improved transmission performance.
3Ease of manufacture
If ideal backhaul is assumed for network device coordination, then simplified scheduling information exchange is possible, but real-world non-ideal backhaul with high delay cannot be accommodated
Solution Approach 1:
The terminal device performs self-service by autonomously collecting scheduling information from network devices, determining unified scheduling parameters, and distributing the unified scheduling information back to the network devices. This self-service capability allows the system to adapt to non-ideal backhaul conditions without requiring complex inter-network-device communication protocols or ideal backhaul assumptions.
Data Source
AI summary
Example data scheduling methods and apparatus are described. One example method includes receiving N pieces of initial scheduling information by a communication apparatus from N network devices. The communication apparatus sends coordinated transmission scheduling information and first indication information, and performs data transmission with M network devices on a time-frequency resource for coordinated transmission. One of the N pieces of initial scheduling information is from one of the N network devices. The N network devices are in one-to-one correspondence with the N pieces of initial scheduling information. The coordinated transmission scheduling information is determined by the terminal device based on the N pieces of initial scheduling information. The first indication information indicates information about the N network devices, where N is an integer greater than 1, M is an integer greater than or equal to N, and the M network devices include the N network devices.