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The 5G RAN imposes stringent demands on the MBH network infrastructure, necessitating a substantial increase in the number of nodes, performance, and feature richness. This elevated complexity poses new challenges that require innovative solutions. Juniper Networks presents an end-to-end 5G xHaul network infrastructure solution designed to support an existing 4G MBH while seamlessly evolving into 5G network infrastructure over the same physical network. This approach facilitates smooth transitions for operators from 4G to 5G without compromising their current services. The transition can be gradual, enabling an introduction of necessary changes that cater to new requirements such as enhanced bandwidth capabilities, sub-millisecond latency, improved synchronization for mission-critical applications, network slicing for customized services, and scalability to manage an increased number of connected devices. Juniper's solution ensures a seamless and efficient evolution of the MBH network infrastructure, meeting the evolving demands of 5G networks.

The 5G solution architecture demands strict QoS to deliver differentiated services and maintain low latency for critical traffic. Key benefits of the LLQ JVD include:

  • Custom Traffic Prioritization: Tailored priorities for enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communications (mMTC).
  • Optimized Parameters: Ensures appropriate bandwidth, latency, and reliability for various traffic classes.
  • Resource Efficiency: Allocates bandwidth and prioritizes traffic efficiently based on application needs.
  • Enhanced User Experience: Provides consistent and reliable quality for streaming, gaming, and remote work.
  • Low Latency Queuing (LLQ): Reduces transmission delay for real-time applications by prioritizing crucial traffic.
  • High Reliability: Minimizes data loss and transmission errors for stable communication in critical services.
  • Urgent Traffic Prioritization: Ensures immediate attention and resources for emergency communications and public safety applications.

These features collectively enable 5G networks to meet modern application demands with robust, efficient, and flexible performance.

The ACX7024, ACX7100-32C, and ACX7509 platforms are presented as DUTs to support deterministic and effective QoS for supporting differentiated and delay-sensitive workloads. These platforms offer an advanced feature-set, enhanced performance, and support a common software architecture and feature roadmap. In addition, the ACX7024, ACX7100, and ACX7509 platforms have successfully completed MEF 3.0 certification, which carries rigid QoS requirements.

As part of this validation, multiple topologies are utilized to provide meaningful data in different circumstances. CoS functional operations are reported without issues, supporting the ability to classify traffic based on BA, Fixed, or Multifield Classification. In the validated design, an eight-queue 5G CoS model is created with four priority queues configured using shaping rate: Signaling, LLQ, Realtime, and Control. These queues carried the most critical traffic types, with the majority for the fronthaul network segment. Another four WFQs are used to allow proportional and dynamic bandwidth allocation based on the transmit rate. These low queues established High, Medium, Low, and Best-Effort service-type categories. Explicit instructions are created for all forwarding classes on the type of traffic to be serviced. Under all scenarios, the expected bandwidth allocation and queue priorities are honored. Codepoint preservation is achieved across all featured VLAN manipulation sequences covered in this JVD.

Through extensive validation, the performance of the ACX7000 platforms exceeded the objectives for latency preservation goals in both non-congested and congested scenarios, delivering a comprehensive multi-priority CoS solution while preserving a latency budget of ≤10µs. During network congestion causing heavy packet loss, the ACX platforms averaged a transit latency of 4-7 microseconds (µs) while delivering services across all eight queues. The device architecture is designed to support delay sensitive applications, with the low-latency queue given further preferential treatment. These capabilities are critical functions for 5G solution architectures.

This JVD is based on 5G reference architectures. However, the CoS modeling, best practices, and performance results are applicable to many implementations. For more details on the Juniper JVD solution tested, see the Test Report or contact your Juniper Networks representative.