Shared Uplink Resource Assignment for C-DRX Wake-Up Signals
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE technologies, face challenges in efficiently managing uplink resources during wake-up procedures in discontinuous reception (DRX) mode, leading to increased power consumption and potential delays in uplink transmissions.
Innovation Solution
The system implements a method where user equipment (UE) detects a wake-up signal (WUS) to determine and share uplink resources with other UEs, allowing for efficient uplink transmissions without additional signaling overhead, thereby reducing power consumption and turnaround time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform individual uplink resource assignments during wake-up procedures, then uplink transmission reliability is improved, but signaling overhead increases and power consumption increases
Solution Approach 1:
Multiple UEs share a common uplink resource for wake-up signal acknowledgments instead of each UE having dedicated resources. The base station receives acknowledgments from multiple UEs on the same uplink resource, reducing signaling overhead while maintaining reliable communication through proper resource allocation and collision handling mechanisms
Solution Approach 2:
The shared uplink resource serves multiple functions: it carries wake-up signal acknowledgments, channel quality indicators, and other uplink control information from multiple UEs simultaneously. This multi-functional use of resources improves efficiency without compromising reliability
2Speed
If UEs wake up frequently to check for uplink resources, then uplink transmission speed is improved, but power consumption increases
Solution Approach 1:
Uplink resources are pre-configured and assigned to UEs before the actual wake-up procedure. When a UE wakes up, it can immediately use the pre-assigned shared resource without waiting for individual resource allocation, enabling fast uplink transmission while minimizing the time the UE needs to stay awake
Solution Approach 2:
The system uses discontinuous reception (DRX) cycles where UEs wake up periodically to check for wake-up signals and transmit acknowledgments on shared uplink resources. This periodic operation allows UEs to remain in low-power state most of the time while maintaining the ability to transmit quickly when needed
3Use of energy by moving object
If UEs share uplink resources during wake-up procedures, then power consumption is reduced, but resource allocation complexity increases
Solution Approach 1:
The shared uplink resource is segmented into multiple orthogonal resources (different time slots, frequency subcarriers, or code sequences) that can be allocated to different UEs. This segmentation allows the base station to manage multiple UEs on shared resources without excessive complexity, as each UE can be assigned specific segments through standardized allocation rules
Solution Approach 2:
The system dynamically adjusts parameters such as the number of available shared uplink resources, the DRX cycle length, and the orthogonal resource assignments based on traffic conditions and UE behavior patterns. These parameter changes allow the system to optimize the balance between power consumption and allocation complexity without requiring complex real-time decision-making
4Productivity
If dedicated uplink resources are assigned to each UE, then uplink transmission efficiency is improved, but network resource utilization decreases
Solution Approach 1:
The system transitions from static dedicated resource assignment to dynamic shared resource allocation. UEs can access uplink resources dynamically based on their actual need to transmit wake-up acknowledgments, allowing the network to efficiently utilize resources by allocating them to multiple UEs when needed while keeping them available for other purposes when not in use
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for assignment of shared uplink resources for uplink transmissions triggered by detection of a wake-up signal (WUS).