Transceiver Scheduling Request Repetition on PUCCH
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Solution Overview
Problem
In non-terrestrial networks, the large round-trip delay and limited radio resources lead to high latency and reliability issues in scheduling requests due to the need for repetitive transmissions, which can result in increased overhead and resource constraints.
Innovation Solution
A transceiver device repeats scheduling requests on multiple opportunities of the physical uplink control channel (PUCCH) at the medium access control (MAC) layer, allowing for increased reliability without additional resource configuration or overhead, by instructing the transceiver to transmit scheduling requests over the PUCCH and managing scheduling request configurations based on priority and periodicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scheduling requests are transmitted repetitively on multiple PUCCH opportunities, then reliability of scheduling requests is improved, but overhead and resource consumption increase
Solution Approach 1:
The patent applies partial action by transmitting scheduling requests only when necessary (when uplink data arrives and no uplink grant is available) rather than continuously. The MAC layer selectively repeats scheduling requests on multiple PUCCH opportunities based on whether the request was successfully received, avoiding unnecessary repetitions and reducing overhead while maintaining reliability for actual scheduling needs
Solution Approach 2:
The patent changes the state of scheduling request transmission from a static single-opportunity approach to a dynamic multi-opportunity approach. The MAC layer modifies transmission parameters by selecting multiple PUCCH opportunities from a configured set, adapting the number and timing of repetitions based on system configuration and actual scheduling needs, thereby optimizing the balance between reliability and resource usage
2Reliability
If scheduling requests are transmitted repetitively to ensure delivery, then reliability is improved, but latency increases due to wait time for acknowledgment
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUCCH opportunities for scheduling request transmission before actual data transmission is needed. When a scheduling request is sent, the MAC layer has already prepared multiple potential transmission opportunities, allowing immediate retransmission without waiting for acknowledgment of the first request, thereby reducing latency while ensuring delivery through pre-planned repetition options
Solution Approach 2:
The patent ensures continuity of useful action by maintaining the scheduling request transmission process active across multiple PUCCH opportunities rather than pausing for acknowledgments. The MAC layer continuously monitors and retransmits scheduling requests on subsequent opportunities until an uplink grant is received, eliminating idle wait time and keeping the data transmission pipeline flowing without interruption
Data Source
AI summary
The present disclosure provides a transceiver device, comprising circuitry, which, in operation, repeats, on a medium access control (MAC) layer, a scheduling request by instructing a transceiver to transmit the scheduling request on a plurality of opportunities of a physical uplink control channel (PUCCH). The transceiver, in operation, transmits the scheduling requests over the PUCCH.