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Bjoern Riemer

PROFILE

Bjoern Riemer

Worked on the 6G-SANDBOX/6G-Library repository, delivering modular 5G core network provisioning and integration solutions for virtualized and Kubernetes-based environments. Developed automated deployment frameworks using Ansible, Terraform, and YAML, enabling reproducible Open5GS and Open5GCore setups with configurable components such as WEB-UI toggles and scalable UE provisioning. Enhanced documentation with Markdown and visual aids to streamline onboarding and clarify deployment processes. Addressed network stability and security by tuning Linux kernel parameters, refining routing management, and implementing hotfixes for IP conflicts and ICMP redirects. Improved system reliability and usability through iterative configuration management, technical writing, and cross-component integration efforts.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

19Total
Bugs
3
Commits
19
Features
8
Lines of code
7,320
Activity Months7

Your Network

13 people

Same Organization

@fokus.fraunhofer.de
4

Shared Repositories

9

Work History

June 2025

5 Commits • 1 Features

Jun 1, 2025

June 2025: Delivered documentation and stability improvements for the 6G-Library (6G-SANDBOX/6G-Library). Implemented Open5G documentation and visual aids enhancements across Berlin RAN and Open5Gcore; introduced deployment-critical configurables (testbed_sim for SIM secrets and an optional SQL dump parameter for UDM) and added illustrative README images. Implemented security and descriptor hardening by disabling ICMP redirects from UPF in open5gcore_vm and open5gs_vm and removing default descriptor values to prevent misconfigurations. Result: clearer onboarding, more robust deployments, and improved network stability across testbeds.

May 2025

2 Commits • 1 Features

May 1, 2025

Month: 2025-05 — Focused delivery on Open5Gcore documentation and deployment configuration enhancements within the 6G-Library. Key update: expanded README to include detailed component purpose, maintainers, capabilities, dependencies, and deployment variables; updated the trial network (TN) example and adjusted README headings to reflect the updated setup. No major bugs fixed this month.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 — 6G-Library monthly summary: Delivered a configurable Open5GS VM WEB-UI installation toggle to improve deployment flexibility and reduce unnecessary UI provisioning. Implemented a new boolean parameter one_open5gs_vm_install_webui and updated the installation workflow to conditionally execute the WEB-UI setup script, enabling modular deployments and faster provisioning.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 focused on upgrading the core network components in the 6G-Library to stable 0.4.0, delivering routing management enhancements and firewall configuration improvements. Completed upgrade of berlin_ran, open5gs_vm, and open5gcore_vm, strengthening component integration and overall core stability. The changes lay the groundwork for improved performance and reliability in the 6G core stack and future feature delivery.

February 2025

1 Commits

Feb 1, 2025

February 2025 — 6G-Library: Stability improvements centered on Open5GS networking. Key bug fix: removed hardcoded IP from ogstun, eliminating UE IP conflicts with SMF-managed addresses. Commit b9f4ba3459dc21a81262916c0976ef4074a425da; changelogs updated. No new features delivered; improvements reduce service disruption and improve uptime. Technologies demonstrated: Open5GS, ogstun interface, IP management, hotfix processes, changelog maintenance.

December 2024

7 Commits • 3 Features

Dec 1, 2024

December 2024 monthly summary for 6G-Library focused on delivering end-to-end 5G core and RAN integration in a VM-based environment, enabling scalable testing and improved stability. Key features delivered include Open5GCore VM deployment with UERANSIM integration and a web-based management UI, MTU fixes, and bastion routing improvements; Open5GS Kubernetes provisioning with one_open5gs_ue_count and Helm template iteration for scalable UE testing; and Berlin RAN integration to connect physical RAN equipment with the 5G core via Route Manager, YAML-based configuration, Ansible playbooks, and reporting templates. Major bug fixes were addressed to stabilize the platform (hotfixes for Open5GCore + UERANSIM, gnbseachlist, and UE-route on bastion), significantly improving reliability and usability. Overall, the month delivered a reproducible, scalable 5G core-to-RAN workflow, reducing setup time and enabling more robust testing and demonstrations. Technologies/skills demonstrated include virtualization/orchestration (Open5GCore VM), Kubernetes and Helm templating, Ansible and YAML configurations, Route Manager, MTU tuning, webCLI, and UERANSIM integration.

November 2024

2 Commits • 1 Features

Nov 1, 2024

November 2024 performance summary for 6G-SANDBOX/6G-Library focused on automating VM-based 5G core provisioning and ensuring accurate network reporting. Delivered an Open5GS VM Deployment Framework and fixed a critical VM result reporting bug, enabling reproducible, observable deployments and reliable networking data.

Activity

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Quality Metrics

Correctness88.4%
Maintainability87.4%
Architecture85.8%
Performance81.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

HTMLJinjaJinja2MarkdownSQLShellTerraformYAMLmarkdownyaml

Technical Skills

5G Core Integration5G Core Network DeploymentAnsibleConfiguration ManagementDevOpsDocumentationHelmInfrastructure as CodeInfrastructure as Code (IaC)KubernetesLinux Kernel TuningNetwork ConfigurationNetwork Function VirtualizationNetwork Function Virtualization (NFV)Open5GS

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

6G-SANDBOX/6G-Library

Nov 2024 Jun 2025
7 Months active

Languages Used

Jinja2MarkdownShellTerraformYAMLHTMLSQLJinja

Technical Skills

5G Core Network DeploymentAnsibleConfiguration ManagementInfrastructure as CodeNetwork Function VirtualizationOpen5GS