Proactive UE Scheduling Requests for Low-Latency Uplink Feedback
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Solution Overview
Problem
Existing wireless communication systems experience excessive latency in TCP communication due to delays in scheduling requests and resource allocation, leading to reduced throughput.
Innovation Solution
User equipment (UE) proactively transmits a scheduling request before receiving feedback from the host, preemptively requesting uplink resources for transmitting feedback messages, thereby reducing latency by synchronizing data delivery with available transmission opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE waits for feedback message processing before transmitting scheduling request, then the system maintains proper protocol sequencing, but latency increases due to sequential processing delays
Solution Approach 1:
The UE transmits the scheduling request in advance, before the feedback message is fully processed and received. This preliminary action allows the uplink resources to be allocated and ready before the feedback message needs to be transmitted, thereby reducing latency while maintaining protocol correctness through buffer mechanisms.
2Productivity
If the UE transmits scheduling request after receiving feedback message, then resource allocation is ensured, but throughput decreases due to delayed feedback transmission
Solution Approach 1:
The scheduling request is transmitted preliminarily, before the feedback message is received. The network node allocates uplink resources in advance based on this early request, ensuring that resources are ready when the feedback message arrives, thus improving throughput without compromising resource allocation reliability.
Solution Approach 2:
The network node provides feedback in the form of an uplink grant in response to the scheduling request. This feedback mechanism ensures that resources are properly allocated and confirmed, maintaining reliability while enabling the low-latency transmission path.
3Use of energy by moving object
If the UE uses standard resource allocation procedures, then resource management is controlled, but power consumption increases due to extended active transmission time
Solution Approach 1:
By transmitting the scheduling request in advance, the UE secures uplink resource allocation before feedback transmission is needed. This allows the UE to enter low-power states during the feedback processing interval, reducing overall power consumption while maintaining operational simplicity through standardized resource allocation procedures.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive downlink data; determine a schedule of a set of uplink channel resources associated with a medium access control layer; alter a behavior of data layer traffic based at least in part on a characteristic of the uplink channel resources; and transmit a feedback message in connection with one or more of the uplink channel resources and based at least in part on altering the behavior of the data layer traffic. Numerous other aspects are provided.