Wireless Resource Re-allocation for URLLC Preemption
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Solution Overview
Problem
In wireless communication systems, terminal devices with lower latency requirements suffer performance loss due to resource re-allocation for higher latency services, such as URLLC, which requires strict latency and reliability, leading to inefficiencies in data transmission.
Innovation Solution
The method involves adaptive resource management, where the network device allocates and re-allocates time-frequency resources to minimize performance loss by using supplementary transmission resources and implicit resource indications, allowing for efficient decoding and retransmission of data that was not sent due to preemptive allocation for URLLC services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If time-frequency resources are re-allocated from eMBB service to URLLC service, then URLLC latency requirement is met, but eMBB service reception performance is degraded
Solution Approach 1:
The patent segments the time-frequency resources into originally allocated resources and re-allocated resources. The terminal device separately identifies and processes data on re-allocated resources, allowing the network to prioritize URLLC transmission while maintaining eMBB service integrity through selective resource management and separate decoding paths.
Solution Approach 2:
The patent applies preliminary action by having the network device pre-indicate the locations of re-allocated time-frequency resources to the terminal device before actual data transmission. This allows the terminal to prepare appropriate reception and decoding strategies in advance, mitigating the performance degradation caused by resource re-allocation.
2Loss of time
If resource re-allocation is implemented for URLLC services, then strict latency requirements are satisfied, but indication resource overhead increases
Solution Approach 1:
The patent merges the indication of re-allocated resource locations with existing downlink control information structures. By integrating resource re-allocation indications into already-transmitted control channels rather than using separate dedicated signaling, the patent reduces additional indication overhead while still providing necessary resource location information to terminal devices.
Solution Approach 2:
The patent makes existing control signaling structures multi-functional by enabling them to carry both traditional scheduling information and re-allocation indication information. This universal approach allows a single control message to serve multiple purposes, reducing the need for additional specialized indication resources.
Data Source
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Figure 1B
Figure 1C~2A
AI summary
A wireless communication method is provided, including: determining a scheduled first time-frequency resource, where the first time-frequency resource is scheduled for a transmit end to send first data, and a re-allocated time-frequency resource in the first time-frequency resource is scheduled to send second data; sending, by the transmit end, the second data on the re-allocated time-frequency resource, and sending a part of the first data on a remaining first time-frequency resource other than the re-allocated time-frequency resource; and sending, by the transmit end, a remaining part of the first data that is not sent due to occupation by the second data, by using a supplementary-transmission time-frequency resource that is determined based on the re-allocated time-frequency resource and that is in a second time-frequency resource.