Uplink Grant Skipping for Wireless Resource Efficiency
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing packet data latency and improving resource efficiency, particularly in LTE networks, where UEs with inactive states continue to receive uplink grants, leading to unnecessary battery consumption and increased interference.
Innovation Solution
The method involves allowing UEs to skip uplink grants when no data is available for transmission, utilizing semi-persistent scheduling, and enabling dynamic scheduling to optimize throughput, thereby reducing latency and conserving battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs continuously receive uplink grants in inactive state, then scheduling reliability is maintained, but battery consumption increases and resource efficiency decreases
Solution Approach 1:
The patent implements dynamic scheduling where the UE transitions between two operational modes: in active state, the UE receives and processes uplink grants continuously to maintain scheduling reliability; in inactive state, the UE skips uplink grants to conserve battery energy. This dynamic adaptation of scheduling behavior based on UE state resolves the contradiction between reliability and energy consumption.
Solution Approach 2:
The patent changes the scheduling parameter from continuous grant reception to conditional grant skipping based on UE state. By modifying the scheduling behavior parameter according to whether the UE is active or inactive, the system achieves both reliable scheduling when needed and energy conservation when the UE is inactive.
2Reliability
If UEs transmit physical control information on data channel, then transmission reliability is improved, but resource efficiency decreases when no data is available
Solution Approach 1:
The patent applies partial action by having the UE transmit only the necessary physical control information when data is available, rather than continuously transmitting. The UE skips transmission when no data is present, avoiding wasted resources while maintaining reliability when transmission is actually needed.
Solution Approach 2:
The UE autonomously determines whether to transmit based on its own data availability status. When the UE has data to send, it uses the uplink grant to transmit physical control information on the data channel; when no data is available, it skips transmission. This self-service approach optimizes resource efficiency without compromising transmission reliability.
3Use of energy by moving object
If UEs skip uplink grants when no data is available, then battery consumption decreases, but packet data latency may increase
Solution Approach 1:
The patent resolves the latency-energy contradiction through dynamic state-based scheduling. When the UE is in active state with data to transmit, it processes uplink grants promptly to minimize latency. When in inactive state, the UE skips grants to conserve battery, accepting that latency will be handled when the UE transitions back to active state. This dynamic approach optimizes both parameters based on actual needs.
Data Source
AI summary
A method and apparatus are disclosed for improving a transmission using a configured resource in a wireless communication system. In one embodiment, the method includes an uplink grant is available for the UE in a TTI, wherein the UE does not have data available for transmission. The method further includes the UE transmitting a physical control information on a data channel according to the uplink grant if the physical control information needs to be transmitted in the TTI. The method also includes the UE skipping the uplink grant if the physical control information does not need to be transmitted in the TTI.