Dynamic Semi-Persistent Scheduling Resource Allocation
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Solution Overview
Problem
In wireless communication systems, semi-persistently scheduled resources often go unused when devices do not have data to transmit, leading to reduced system efficiency and throughput.
Innovation Solution
A first device allocates semi-persistently scheduled resources to either the requesting device or another device based on traffic status by using restart resources for the requesting device to claim the SPS resources, ensuring they are utilized even when the original device has no data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistently scheduled resources are allocated to a device, then the device can transmit data without requesting resources dynamically, but the resources go unused when the device has no data to transmit
Solution Approach 1:
The patent makes the SPS resource allocation dynamic by introducing a claim indicator mechanism. Instead of static allocation, the second device can dynamically claim resources by setting a claim indicator in transmitted messages, and the first device can reallocate resources based on whether the claim is present or absent, adapting resource usage to actual traffic conditions.
Solution Approach 2:
The patent changes the state parameter of resource allocation from fixed to variable by using the claim indicator as a control parameter. When the claim indicator is present, resources remain allocated to the second device; when absent, resources are freed for reallocation, thus adjusting resource parameters based on traffic status.
2Ease of operation
If SPS resources are reserved for a device, then resource allocation is simplified, but system throughput decreases when resources remain unused
Solution Approach 1:
The patent introduces feedback through the claim indicator mechanism. The second device provides feedback about its traffic status by claiming resources when needed (setting claim indicator) and not claiming when idle (omitting claim indicator), enabling the first device to adjust allocations and maintain high throughput while keeping operation simple.
Solution Approach 2:
The second device self-manages resource claims by autonomously setting the claim indicator based on its own traffic conditions. This self-service approach maintains allocation simplicity for the first device while ensuring resources are actively used when needed, preventing throughput loss.
3Productivity
If the first device waits for the second device to request SPS resources, then resource allocation can be optimized, but time is lost when resources could be reallocated immediately
Solution Approach 1:
The patent applies preliminary action by having the second device include the claim indicator in advance within its transmitted messages (e.g., data packets or control messages). This allows the first device to detect the absence of a claim proactively and reallocate resources without waiting for explicit release requests, reducing reallocation delay while maintaining optimization.
Data Source
AI summary
Methods, systems, and devices for wireless communications at a device are described. The device may receive an indication of a configuration that schedules semi-persistently scheduled resources for transmissions from the first device. The device may also receive an indication of a set of resources available to the first device for requesting a set of the semi-persistently scheduled resources configured for the first device. The device may transmit a message over the set of resources to request the set of semi-persistently scheduled resources.