Uplink Scheduling with Downlink Data Flag
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Solution Overview
Problem
Current preconfigured periodical uplink communication methods, such as D-PUR, are inefficient for IoT devices as they require significant signaling overhead and energy consumption, especially when downlink data is rarely available, and involve unnecessary checks for data availability during data transmission.
Innovation Solution
A method where the base station negotiates with user equipment to set up a preconfigured periodical uplink communication schedule, receiving a downlink data flag to determine if the user equipment is prepared to receive downlink data, and only checks for availability in advance if the flag indicates so, reducing unnecessary checks and acknowledgments, thus optimizing resource allocation and energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station checks for downlink data availability during every preconfigured periodical uplink communication occasion, then the user equipment can receive downlink data when available, but the signaling overhead and time consumption increase significantly
Solution Approach 1:
The base station performs the downlink data availability check in advance (before the uplink communication occasion) rather than during the actual communication. This preliminary action allows the system to prepare for potential downlink data transmission without interfering with the uplink data transmission timing, thereby reducing signaling overhead and time consumption while maintaining the ability to receive downlink data when available
2Adaptability or versatility
If the base station performs downlink data availability checks during uplink transmission, then downlink data can be delivered, but the transmission time and energy consumption increase
Solution Approach 1:
The availability check is performed before the uplink communication occasion begins, allowing the base station to determine whether downlink data need to be transmitted without delaying the uplink transmission. This timing separation ensures that the check does not consume uplink transmission time or energy, while still enabling timely downlink data delivery when needed
3Reliability
If the base station sends acknowledgments and sets up RRC transmissions for every data packet, then data transmission reliability is improved, but the complexity of the communication protocol increases
Solution Approach 1:
The base station determines in advance whether downlink data are available before the uplink communication occasion. This preliminary determination allows the system to prepare appropriate response actions (such as setting up RRC transmissions or sending acknowledgments) without adding complexity to the real-time protocol execution. The reliability mechanisms are pre-planned based on the availability check results rather than being triggered dynamically during transmission
Data Source
AI summary
Provided is a method for a method to operate a base station being part of a cellular network, the base station being configured for conducting a preconfigured periodical uplink communication schedule with at least one user equipment. The base station negotiates with the user equipment for setting up the preconfigured periodical uplink communication schedule. A downlink data flag indicating if the user equipment is prepared to receive downlink data in conjunction with at least one preconfigured periodical uplink communication occasion is received. Network resources are allocated at a time synchronized with the preconfigured periodical uplink communication schedule of a data transmission as part of a preconfigured periodical uplink communication occasion. Other embodiments are disclosed.