Sometimes,
it is twenty-four seven thinking,
rewarded with unique enlightening ideas .

Digging deeper ever since. Nerd Face

Student Worker

FootPath

Infrastructure-less Indoor Navigation

2012 - 2013

Map-aided Smartphone Indoor Navigation

  • New Heading · Step Detection Algorithm
  • Automatic POI-evaluation · Technical Map Overlay
  • Route LTL Evaluation
  • Multimodal User Feedback
Mobile World Congress 2012 , Barcelona ES
More Info
  • Bitsch et al. International Conference on Indoor Positioning and Indoor Navigation IPIN'11 PDF
  • My Master Thesis PDF

Advisor: Dr. Jó Ágila Bitsch Link

COMSYS

JavaMatlabXML

SoulMigration

Seamless Application State Migration

2011 - 2012

Application State Abstract Data · Policies / Capabilities · Inter Device / OS Transfer

  • Domain Specific Language Design
  • LL(k) Grammar Parsing
  • Generative Software Development · Abstract Syntax Trees / Data Types
  • Networking Protocol · Interface Design
  • PoC Prototyping · Chess
Mobile World Congress 2012 , Barcelona ES

Advisor: Uta Christoph

Today, mobile users frequently switch between heterogeneous devices depending on their location, preferences, and current needs. Each time a user switches to another device the working context is lost and has to be manually reestablished on the new device. With the growing number of devices per user and an increasing need for mobility this becomes a cumbersome task.
SoulMigration is an architecture for seamless cross-application migration between heterogeneous devices. Our architecture automates and simplifies the migration process by providing the means to extract the current state information of an application, discover possible target devices, migrate the state to a target device, and finally reestablish the previous working state. By this it gives the users the impression of a seamless working environment.

COMSYS

JavaJavaCC/JTree

IMS Integration

IMS OneAPI JAIN SLEE Application Server Implementation

2009 - 2010

RESTful ParlayX/OneAPI PoC Implementation

  • IMS IP Multimedia Subsystem
  • JAIN SLEE Application Server Prototyping
More Info

Advisor: Dr. Juan Miguel Espinosa Carlin

COMSYS

JavaParlayX/OneAPISIP

Some Study Projects

Wireless Sensor Networks Lab

RSSI Based Multihop Neighborhood Surveillance

2011

RSSI based Collaborative Multi-Tenant Neighborhood Distance Estimation · DFA-based State Inference

TelosB Device

Example Measurement

COMSYS

nesC

3D N-Body Particle Simulation

Event-Based Simulation Tailored to IBM CELL Architecture

2008

Event-Based Physical Simulation on hybrid CPU architecture · PowerPC core (PPE) & 8 streamlined SIMD SPEs

  • Project · Definition / Goals / Responsibilities
  • Physics Engine
  • Parallelization · Data Strcutures
  • IPC · DMA
  • CLI Scenario Editor
    • Various 3D shapes
    • Rotations · Translations
    • Static velocity
Demo · #1 #2 #3

former Chair for Operating Systems

C(++)IBM Cell

Some Leisure Projects

DSBot

Browsergame-Automation & Statistical Analysis

2020

Browser python asyncio controlled Automation

  • Greasemonkey Data Scraping
  • Interfacing · Storage
  • Backend · PHP / MySQL
  • Data Warehousing · ClickHouse
  • Visualization · Grafana

Screenshots

PHPHTML/CSS/JSPythonSQLregex

TIC

Tactical Information Center

2016

Web-based Browsergame Collaboration Platform

  • Operations · Maintenance
  • In-Game Data Scraping
  • Key-Score Estimation · Statistical Inference
  • Agile Development
    • Game Battle Simulator n×m
    • Scanning · Reward Subsystem
    • Data-Driven Mass-Coordination Tool
  • source

PHPHTML/CSS/JSSQL

IoTduino

Arduino Wireless Sensor Network

2013 - 2015

Arduino-based OS Suite for Wireless Sensor Networks

  • PHY communication via 433MHz · RF24
  • Multihop Routing
  • Device · Management / Data Polling
  • Rule-based Alarms
  • External Memory (SPI)
  • Multitude of tailored Drivers
  • Output · LCD Display / SD Card

C(++)

sirious!

icon

Siri-Client for Android

2012

An Android clone for Apple’s Siri

  • Message Passing Classes w/ PList Wrapper
  • Siri Protocol · Implementation / Networking
  • Android App · Architecture / UX
  • Jan’s server

Screenshots

Java

N-Frag

Organizing LAN Parties for up to 1400 People

1999 - 2005

Formerly NNGA e.V.

  • Webpage · Programming / Registration
  • Intranet · Info / Tournament-System / Food Ordering
  • Tournament Organization
  • Server Administration
  • N-Frag 4 Teaser*

Jens Helge Reelfs Photo

Address
Helge Reelfs
Brandenburg University of Technology
Chair of Computer Networks
Konrad-Wachsmann-Allee 5
03046 Cottbus, Germany
Map
Email · reelfs@b-tu.de
My Group
Chair of Computer Networks
Networking
LinkedIn
Xing
ResearchGate
GitHub
Twitter
Publications
DBLP
Google Scholar

let's talk


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