Application Server Buffering for Wireless Communication Jitter
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Solution Overview
Problem
Wireless communications systems experience jitter, which causes user equipment (UE) to operate in connected mode for an extended period, leading to reduced power savings.
Innovation Solution
Application servers buffer a portion of packet data unit (PDU) sets for a threshold percentage of the jitter window before the delivery deadline, enabling deterministic arrival times and allowing for power-saving discontinuous reception (DRX) cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE operates in connected mode to receive periodic burst transmissions, then the delivery deadline can be met, but the power consumption increases due to extended connected mode operation
Solution Approach 1:
The application server performs preliminary buffering of PDU sets for a threshold percentage of the jitter window before the expected arrival time. This advance action compensates for potential delivery delays and ensures that packets are ready at the UE even when arrival times vary within the jitter window, allowing the UE to use shorter DRX cycles and reduce power consumption while still meeting delivery deadlines.
2Stability of the object's composition
If the application server buffers PDU sets for a threshold percentage of the jitter window, then deterministic arrival times are achieved, but the transmission time is delayed
Solution Approach 1:
The application server buffers PDU sets in advance for a threshold percentage of the jitter window duration. This preliminary buffering action creates a buffer period before the expected arrival time, ensuring that packets are ready for deterministic delivery. The buffering duration is calculated as a proportion of the jitter window, balancing determinism requirements with acceptable delay.
Solution Approach 2:
The system changes the timing parameter by introducing a buffer duration that is a threshold percentage of the jitter window. This parameter modification transforms variable arrival times into deterministic arrivals by adjusting the release timing of buffered packets, achieving predictable delivery while controlling the impact on overall transmission time.
3Use of energy by moving object
If the UE uses longer DRX cycles to save power, then power consumption decreases, but the ability to meet delivery deadlines under jitter conditions deteriorates
Solution Approach 1:
The application server performs preliminary buffering of packets for a threshold percentage of the jitter window before the expected arrival time. This advance preparation ensures that packets are ready for deterministic delivery, allowing the UE to use longer DRX cycles (for power savings) while still meeting delivery deadlines, because the buffered packets compensate for potential delays within the jitter window.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. An application server (AS) may generate one or more packet data unit (PDU) sets of a first periodic burst transmission. The first periodic burst transmission may correspond to a first delivery deadline at a user equipment (UE) during a jitter window. The jitter window may span a time period prior to and after a first arrival time associated with the one or more PDU sets. The AS may buffer at least a portion of the one or more PDU sets for a first duration of the jitter window. The first duration may correspond to a threshold percentage of the jitter window. The AS may output the one or more PDU sets based on expiration of the first duration and prior to the first delivery deadline.