Wireless Packet Transmission Using Survival Time and Delay Budget
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Solution Overview
Problem
Existing wireless communication systems fail to consider reliability requirements during radio resource allocation, leading to increased consecutive packet loss in critical industrial applications with strict quality of service demands, such as emergency shutdowns or production stops.
Innovation Solution
A method and apparatus for a network node that determines packet delay budget (PDB) and total delay time interval, adjusting block error rate (BLER) and transmission parameters to ensure reliable data packet delivery within the PDB, considering survival time and reliability requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio resources are allocated without considering reliability requirements, then device complexity is reduced and ease of operation is improved, but consecutive packet loss increases and reliability deteriorates
Solution Approach 1:
The network node determines the total delay time interval in advance based on the packet delay budget and estimated number of consecutive packets, before actual transmission occurs. This preliminary calculation enables the node to proactively adjust transmission parameters and allocate radio resources in a way that guarantees reliability requirements are met, rather than reacting to packet loss after it occurs.
Solution Approach 2:
The network node dynamically adjusts transmission parameters such as modulation and coding scheme, transmission power, and resource block allocation based on the determined total delay time interval and reliability requirements. This dynamic adaptation allows the system to optimize radio resource allocation in real-time, balancing reliability with spectral efficiency while managing device complexity through automated control.
2Reliability
If transmission parameters are adjusted to meet reliability requirements, then consecutive packet loss is reduced, but transmission time and resource consumption increase
Solution Approach 1:
The network node changes transmission parameters such as modulation and coding scheme (MCS), transmission power, and resource block size based on the calculated total delay time interval and packet delay budget. By adjusting these parameters, the system optimizes the trade-off between reliability and transmission time, ensuring that packets are delivered reliably within the required time constraints without unnecessary delays.
Solution Approach 2:
The system preliminarily determines the total delay time interval by calculating the sum of individual packet delay budgets and survival time before actual transmission. This advance planning allows the network node to allocate radio resources and set transmission parameters in a way that guarantees meeting reliability requirements while minimizing overall transmission time, rather than reacting to delays after they occur.
3Reliability
If strict QoS requirements are enforced for all traffic, then reliability is improved for critical applications, but adaptability and versatility deteriorate
Solution Approach 1:
The network node applies different transmission strategies and reliability requirements to different data flows based on their specific QoS needs. By identifying which flows require strict QoS guarantees (e.g., industrial control traffic) versus which can tolerate variations (e.g., best-effort traffic), the system provides localized quality optimization without compromising overall system adaptability and versatility.
Solution Approach 2:
The system dynamically adapts its behavior based on the identified traffic type and QoS requirements. For critical industrial applications, the network node enforces strict reliability requirements and adjusts transmission parameters accordingly, while for other traffic types it adopts more flexible, adaptive transmission strategies. This dynamic differentiation maintains both reliability for critical flows and versatility for diverse traffic types.
Data Source
AI summary
Embodiments of the present disclosure provide a method performed by a network node for transmission of data packets to a wireless device. The method comprises obtaining a packet delay budget, PDB, wherein the PDB represents a maximum allowable delay for a data packet. The method comprises determining a total delay time interval indicating a delay incurred for an estimated number of consecutive data packets transmitted from the network node to the wireless device. The method comprises transmitting the data packets to the wireless device based on if the determined total delay time interval exceeds the obtained PDB or not. Corresponding network node, and computer program products are also disclosed.