End-to-End Delay Bound for VR Services in 6G Terahertz Networks with Heterogeneous Traffic and Different Scheduling Policies
Abstract
:1. Introduction
- The system performance analysis of a 6G PEC network’s behavior, operating at terahertz frequencies, in supporting the uVR services. The whole scenario has been modeled as a tandem system, in which the first subsystem represents the access towards the PEC node in order to send the packet needing computation, the second subsystem is the computation module, and the last subsystem models the transmission of the packet back to the user. The access subsystem is without contention, the computation module is shared among different traffic flows heterogeneous in QoS, which compete with each other to receive the service. Then, the tasks pass through the transmission subsystem to be sent back to the device;
- Formulation of the per-flow e2e delay bound of services in the presence of concurrent traffic flows, under the assumption of both the EDF and the FIFO scheduling policies. The proposed per-flow bounds have been modeled by resorting to the application of the SNC principles together with the martingale envelopes, which are a recognized theoretical tool capable of empowering the analytical prediction about the network’s behavior;
- The validation of the proposed analytical bounds that exhibit remarkable closeness between the theoretical results and the actual simulation outcomes, for both the considered scheduling policies. In fact, the per-flow e2e delay bounds achieve accurate performance predictions about the reliability of the PEC network in guaranteeing the QoS constraints imposed by the heterogeneous traffic flows. It is important to highlight that, due to the tightness of the proposed bound to the simulation results, the analytical prediction formulated is particularly suitable in the planning design phase of a next generation network that aims to guarantee fixed QoS requirements, providing the chance to perform proper resource allocation strategies.
2. Related Works
3. System Model
3.1. Channel Model
3.2. Channel Access Scheme
4. Stochastic Network Calculus Principles
Stochastic Network Calculus Fundamentals
5. End-to-End Delay Analysis
5.1. Martingale Bound for FIFO Policy
5.2. Martingale Bound for EDF Policy
- 1.
- , ;
- 2.
- .
6. Performance Analysis
7. Conclusions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
Appendix A
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Picano, B. End-to-End Delay Bound for VR Services in 6G Terahertz Networks with Heterogeneous Traffic and Different Scheduling Policies. Mathematics 2021, 9, 1638. https://doi.org/10.3390/math9141638
Picano B. End-to-End Delay Bound for VR Services in 6G Terahertz Networks with Heterogeneous Traffic and Different Scheduling Policies. Mathematics. 2021; 9(14):1638. https://doi.org/10.3390/math9141638
Chicago/Turabian StylePicano, Benedetta. 2021. "End-to-End Delay Bound for VR Services in 6G Terahertz Networks with Heterogeneous Traffic and Different Scheduling Policies" Mathematics 9, no. 14: 1638. https://doi.org/10.3390/math9141638
APA StylePicano, B. (2021). End-to-End Delay Bound for VR Services in 6G Terahertz Networks with Heterogeneous Traffic and Different Scheduling Policies. Mathematics, 9(14), 1638. https://doi.org/10.3390/math9141638