Adaptive Voice Scheduling for UE Sleep-Wake Power Control
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Solution Overview
Problem
Conventional methods for voice packet transmission and reception in wireless communication result in excessive power consumption due to unnecessary transitions to awake mode for both UEs, as they follow pre-scheduling and scheduling requests, even when no packets are being transmitted or received.
Innovation Solution
Implementing mechanisms for Connected Mode Discontinuous Reception (CDRX) and resource allocation, where UEs transition to sleep mode when no packets are being transmitted or received, using wake-up signals and scheduling requests only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-scheduling method is used for UE to transition to awake mode for UL transmission, then transmission latency is reduced, but UE power consumption increases due to unnecessary awake mode transitions
Solution Approach 1:
The patent implements dynamic scheduling where the UE's operational mode (awake or sleep) is determined by real-time voice packet availability rather than fixed pre-scheduling. The network dynamically adjusts scheduling decisions based on whether the UE actually has voice packets to transmit, allowing the system to adapt between low-latency awake mode operation and low-power sleep mode operation based on current traffic conditions
Solution Approach 2:
The patent changes the operational parameter of the UE from a static pre-scheduled awake mode to a dynamic state based on voice packet buffer status. When the voice packet buffer is empty, the UE transitions to sleep mode; when packets are available, the UE transitions to awake mode for transmission. This parameter change based on buffer status resolves the contradiction between maintaining readiness for transmission and conserving power during silence periods
2Productivity
If scheduling request is used when UE has UL voice packets, then transmission timing is optimized, but UE transitions to awake mode twice causing additional power consumption
Solution Approach 1:
The patent extracts and eliminates the redundant awake mode transition by integrating the scheduling request function directly into the voice packet transmission flow. Instead of requiring a separate scheduling request phase followed by transmission phase (which causes two transitions), the system allows the UE to transition to awake mode once and transmit both the scheduling request and voice packets in a single operational window, removing the duplicate transition overhead
3Reliability
If UE transitions to awake mode based on predetermined schedule, then DL voice packets can be received timely, but power is consumed even when no DL packets are available
Solution Approach 1:
The patent implements feedback-based discontinuous reception where the UE's reception behavior is controlled by feedback from the network about downlink voice packet availability. The network informs the UE whether DL voice packets are pending, and the UE adjusts its reception schedule accordingly - transitioning to awake mode only when DL packets are actually available, rather than following a rigid predetermined schedule. This feedback loop maintains reliable packet reception while eliminating unnecessary awake mode transitions during silence periods
Data Source
AI summary
Some aspects of this disclosure relate to apparatuses and methods for implementing mechanisms for configuring Connected Mode Discontinuous Reception (CDRX) and resource allocation. For example. a user equipment (UE) includes a transceiver configured to enable wireless communication with a base station and a processor. The processor is configured to receive, using the transceiver and from the base station, a message indicating whether a downlink (DL) voice packet is to be transmitted to the UE. The processor is further configured to determine whether the UE is transmitting an uplink (UL) voice packet. In response to the message indicating that no DL voice packet is to be sent to the UE and a determination that no UL voice packet is to be transmitted to the base station. the processor is configured to refrain from starting a discontinuous reception (DRX) timer and to transition the UE to a sleep mode.