Relay Device Uplink Scheduling via Priority Buffer Reports
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling uplink transmissions using relay devices, leading to increased latency and reduced functionality due to improper prioritization of data, which affects the performance of user equipment (UE) in providing low-latency services.
Innovation Solution
The proposed method involves a UE transmitting an uplink request that includes a scheduling request or control information, receiving a grant of a sidelink resource, and then transmitting a buffer status report to a relay device on a sidelink channel. The relay device determines the priority of the data and forwards the report to the base station, allowing for proper scheduling based on priority, thereby reducing latency and enhancing functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay devices are used to forward uplink transmissions from UEs to base stations, then coverage and connectivity are improved, but transmission latency increases due to additional relaying steps
Solution Approach 1:
The base station pre-allocates uplink resources to relay devices before the relay devices need to forward UE transmissions. This allows relay devices to immediately forward received packets without waiting for resource allocation, reducing the latency introduced by relaying while maintaining connectivity benefits.
Solution Approach 2:
The patent introduces a scheduling mechanism where the base station acts as an intermediary that coordinates resource allocation between UEs and relay devices. By managing the scheduling of relay device transmissions, the system optimizes the balance between utilizing relay devices for connectivity extension and minimizing the latency they introduce.
2Reliability
If relay devices forward all uplink transmissions, then connectivity is maintained, but resource utilization efficiency decreases due to improper prioritization
Solution Approach 1:
The patent implements priority-based resource allocation where different uplink transmissions receive different levels of resource allocation based on their priority. High-priority traffic from relay devices receives preferential treatment in resource allocation, ensuring that critical transmissions are handled efficiently while maintaining overall connectivity for all transmissions.
Solution Approach 2:
The base station performs preliminary prioritization and resource allocation for relay device transmissions before actual data forwarding occurs. This allows the system to pre-allocate resources based on traffic priority, improving resource utilization efficiency by ensuring that high-priority transmissions have dedicated resources ready.
3Adaptability or versatility
If relay devices are introduced to extend network coverage, then service functionality is improved, but system complexity increases due to additional scheduling and coordination requirements
Solution Approach 1:
The base station's existing scheduling mechanism is extended to handle relay device transmissions alongside direct UE transmissions. By making the scheduling system universal and capable of handling both direct and relayed transmissions through a unified resource allocation framework, the patent avoids creating separate complex scheduling systems while still providing enhanced service functionality through relay devices.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a relay device may receive, from a first user equipment (UE) on a sidelink channel, a buffer status report. Accordingly, the relay device may receive, from a base station, a grant of an uplink resource based at least in part on determining a priority of data associated with the buffer status report. Additionally, the relay device may transmit, to the base station, the buffer status report based at least in part on receiving the grant of the uplink resource. Numerous other aspects are provided.