Semi-Persistent Scheduling Resource Release in D2D Communication
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Solution Overview
Problem
In device-to-device communication scenarios, the existing semi-persistent scheduling method leads to resource wastage as the base station cannot accurately determine when to release allocated resources due to the use of padding messages, which may not be received, causing inefficient allocation and utilization of resources.
Innovation Solution
Implementing a method where user equipment sends a release indication message to the base station after device-to-device communication ends, allowing the base station to accurately release the semi-persistent scheduling resource, and using dedicated SR resources for data transmission to determine the need for D2D data transmission, thereby optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses padding messages to determine when to release SPS resources, then the resource allocation can be maintained for periodic transmissions, but the base station cannot accurately determine when to release resources leading to resource wastage
Solution Approach 1:
The patent introduces a feedback mechanism where the UE sends an explicit indication message to the base station to notify resource release. This feedback loop allows the base station to accurately determine when to release SPS resources based on actual transmission completion rather than relying on ambiguous padding messages, thereby improving resource allocation accuracy and preventing resource wastage
Solution Approach 2:
The UE autonomously determines when SPS resources should be released and actively notifies the base station through an indication message. This self-service approach allows the UE to manage its own resource allocation lifecycle, eliminating the need for the base station to continuously monitor and infer resource release timing from padding messages
2Productivity
If the base station allocates SPS resources for periodic voice data transmission, then the periodic scheduling requirement is met, but the base station cannot accurately determine when transmission ends leading to inefficient resource utilization
Solution Approach 1:
The explicit indication message creates a direct feedback channel from UE to base station regarding transmission completion status. This allows the base station to immediately release SPS resources after the UE finishes transmission, eliminating delays caused by continuous monitoring and improving overall resource utilization efficiency
Solution Approach 2:
The base station pre-configures SPS resources for periodic transmission, and the UE prepares to send the indication message in advance when transmission completes. This preliminary preparation ensures that resource release can occur promptly without delay, optimizing the timing of resource reallocation
Data Source
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AI summary
Embodiments of the present invention provide a method and an apparatus for semi-persistent scheduling SPS. The method for semi-persistent scheduling SPS includes: interacting, by first user equipment, with a base station to obtain an SPS resource allocated by the base station; performing, by the first user equipment, device-to-device D2D communication with second user equipment by using the SPS resource; and after the D2D communication ends, sending, by the first user equipment, release indication information to the base station, so that the base station releases the SPS resource. In the embodiments of the present invention, after D2D communication ends, first user equipment sends a release indication message to a base station, so that the base station can release an SPS resource, preventing waste of resources.