Relay UE Scheduling Information Forwarding for D2D Resource Allocation
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Solution Overview
Problem
In device-to-device (D2D) communications, there is a challenge in efficiently sending scheduling information from a base station to remote UE using a relay UE, as existing methods struggle to effectively indicate resource allocation.
Innovation Solution
A method where a first device receives scheduling information from a network device and forwards it to a second device, determining a target time domain position based on the received information and predefined intervals, allowing the second device to allocate resources for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base station sends scheduling information directly to remote UE, then scheduling reliability is improved, but device complexity increases due to the need for relay mechanisms
Solution Approach 1:
The patent introduces a relay UE as an intermediary device between the base station and remote UE. The relay UE receives scheduling information from the base station and forwards it to the remote UE, enabling indirect communication that maintains scheduling reliability while managing system complexity through a dedicated intermediary node.
Solution Approach 2:
The scheduling information transmission process is segmented into two distinct stages: first, the base station sends scheduling information to the relay UE; second, the relay UE forwards the information to the remote UE. This segmentation allows each device to have simplified functionality while maintaining overall system reliability.
2Productivity
If resource allocation information is transmitted through relay UE, then spectrum utilization is improved, but time delay increases in scheduling information delivery
Solution Approach 1:
The relay UE is pre-configured with relay functionality and maintains a ready state to immediately forward scheduling information when received. This preliminary preparation minimizes processing delays and enables rapid information transmission, reducing the time penalty associated with relay-based communication.
3Measurement precision
If interval calculations are performed for time domain resource allocation, then resource allocation precision is improved, but computational complexity increases at the relay device
Solution Approach 1:
The patent transforms the resource allocation problem into parameter-based calculations involving time domain intervals. By defining specific interval parameters (first interval from scheduling information, second interval for resource allocation, third interval as their difference), the system achieves precise resource allocation through straightforward arithmetic operations rather than complex algorithms.
Solution Approach 2:
The interval calculation logic is localized to specific fields within the scheduling information structure. The first indication information carries the first interval, and the second indication information carries the second interval, allowing the relay UE to perform targeted calculations only where needed rather than processing entire data structures.
Data Source
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AI summary
This application provides a resource indication method, a communications apparatus, and a network device. The method includes: receiving, by a first device in a first time domain position, first scheduling information sent by a network device, where the first scheduling information includes first indication information, and the first indication information is used to indicate a first interval; and sending, by the first device, second scheduling information to a second device in a second time domain position, where the second scheduling information includes second indication information, the second indication information is used to indicate a second interval, the second interval is a difference between the first interval and a third interval, the third interval is a difference between the second time domain position and the first time domain position, the second scheduling information is used by the second device to determine that the target time domain position is a sum of the second time domain position and the second interval, and the target time domain position is used by the second device to determine a time domain resource used to send and/or receive data.