Downlink SPS Resource Sizing for Time-Varying 5G Packets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G wireless communication systems face challenges in efficiently handling time-varying packet sizes in downlink transmission, leading to increased UE power consumption and inefficient resource allocation due to rigid PDCCH monitoring and scheduling designs.
Innovation Solution
Implementing dynamic Semi-Persistent Scheduling (SPS) with adaptive resource allocation, where the base station configures periodicity and physical layer resources to adjust the size of secondary resources based on traffic variations, and embeds signaling within the DL SPS PDSCH to indicate resource adjustments, allowing UEs to dynamically modify and decode resource sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If rigid PDCCH monitoring and scheduling designs are used in 5G downlink transmission, then resource allocation simplicity is maintained, but UE power consumption increases and resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements dynamic Semi-Persistent Scheduling (SPS) where the base station configures periodicity and physical layer resources to adjust the size of secondary resources based on traffic variations. The UE monitors the first physical layer resource on each SPS occasion to decode a second indication, which dynamically modifies the size of the second physical layer resource for SPS DL data transmission. This dynamic adjustment mechanism allows resource allocation to adapt to actual traffic conditions, reducing UE power consumption by avoiding continuous monitoring while maintaining flexibility.
Solution Approach 2:
The patent changes the parameter of physical layer resource size dynamically through signaling. The base station transmits a first indication for a first physical layer resource in DL SPS configuration, and the UE decodes a second indication that modifies the size of the second physical layer resource. This parameter change approach enables the system to adjust resource allocation according to traffic needs without changing the fundamental scheduling structure, thereby reducing power consumption while maintaining adaptability.
2Productivity
If dynamic resource allocation is implemented to handle time-varying packet sizes, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the physical layer resources into a first physical layer resource and a second physical layer resource. The first physical layer resource is used for transmitting the second indication that dynamically modifies the size of the second physical layer resource for SPS DL data transmission. This segmentation allows the system to handle dynamic resource allocation efficiently by separating the control signaling (first resource) from the data transmission resource (second resource), thereby improving resource allocation efficiency without significantly increasing overall system complexity.
Solution Approach 2:
The patent employs Semi-Persistent Scheduling where the base station pre-configures the DL SPS with periodicity and physical layer resource indications. The UE is pre-configured with the first physical layer resource to monitor and the second physical layer resource boundary information. This preliminary configuration reduces the need for continuous dynamic scheduling decisions, improving resource allocation efficiency for time-varying traffic while keeping the system complexity manageable through pre-established patterns.
3Adaptability or versatility
If fixed size physical layer resources are allocated for SPS DL transmission, then resource allocation simplicity is maintained, but adaptability to time-varying packet sizes deteriorates
Solution Approach 1:
The patent introduces a first physical layer resource as an intermediary that carries a second indication to dynamically modify the size of the second physical layer resource for SPS DL data transmission. This intermediary mechanism allows the system to adapt to time-varying packet sizes by transmitting size modification information through the first resource, thereby achieving packet size adaptability without requiring complete reconfiguration of the SPS structure, thus limiting the increase in resource modification complexity.
4Adaptability or versatility
If continuous PDCCH monitoring is performed to handle dynamic scheduling, then scheduling flexibility is improved, but UE power consumption increases
Solution Approach 1:
The patent implements Semi-Persistent Scheduling with a configured periodicity for monitoring the first physical layer resource. Instead of continuous PDCCH monitoring, the UE monitors the first physical layer resource periodically according to the SPS periodicity to decode the second indication that modifies the second physical layer resource size. This periodic action maintains scheduling flexibility for handling time-varying packet sizes while significantly reducing UE power consumption compared to continuous monitoring by creating regular intervals where monitoring is required.
Data Source
AI summary
A method and apparatus of a device that handles time-varying packet size in the downlink. In some embodiments, the method performed by a user equipment (UE) comprises: receiving a first signaling comprising configuration of downlink (DL) Semi-Persistent Scheduling (SPS), wherein the DL SPS configuration comprises a periodicity of the DL SPS and a first indication for a first physical layer resource, and wherein the first physical layer resource is used to dynamically modify size of a second physical layer resource for SPS DL data transmission; receiving a second signaling that activates reception based on the DL SPS, wherein the second signaling comprises information to specify a boundary of the second physical layer resource; monitoring the first physical layer resource on each SPS occasion based on the periodicity to decode a second indication; determining the size of the second physical layer resource for SPS DL data transmission, based on the second indication; and receiving data on the second physical layer resource determined for each SPS occasion based on the determined size.