Rasmus Abildgren

Bio: Rasmus Abildgren is an academic researcher from Samsung. The author has contributed to research in topics: Network packet & Bluetooth. The author has an hindex of 4, co-authored 4 publications receiving 34 citations.

On Relay Selection Approaches in Bluetooth Mesh Networks

Abstract: Bluetooth Mesh (BM) is a new communication standard, which is designed for the upcoming Internet of Things. It builds on the Bluetooth Low Energy (BLE) protocol and allows devices to extend the range and create a mesh network. BM introduces a publisher/ observer structure where a publisher node can broadcast a packet, known also as an advertisement, and all observers can receive the packet. Typically, in BM networks flooding is used to propagate the advertisements. Flooding is known to suffer from broadcast storm problem and be nonreli-able. To improve packet delivery ratio we propose an approach where only a few nodes, relays, are involved in packet forwarding. Selection of the relay nodes, which is a focus of the paper, is a nontrivial task: on the one hand, a minimization of number of relays is desired, on the other hand, using a minimum dominated set would not provide redundancy. We consider three different relay selection mechanisms and develop their extensions that are capable to operate in a distributed fashion. Their performance is evaluated via extensive simulations.

Method for processing data based on bluetooth protocol and electronic device thereof

Abstract: The present disclosure relates to a method and an electronic device for processing data on the basis of a Bluetooth Low Energy (BLE) protocol. The electronic device includes a Bluetooth control module and a processor. The Bluetooth control module stores a modified BLE protocol stack including at least two Attribute Protocols (ATTs) for use with an application, the modified BLE protocol stack includes a first path and a second path. The first path includes a first ATT protocol to process an ATT command of the application, and the second path includes a second ATT protocol to process an ATT command of the application. The processor is coupled to the Bluetooth control module. The processor processes data of the application including the ATT command, using the modified BLE protocol stack including the at least two ATTs of the Bluetooth control module.

Method and apparatus for transmitting audio data

Abstract: An electronic device that uses a method of transmitting audio data is provided The method includes encoding first audio data of a first audio stream section included in an audio stream, encoding second audio data of a second audio stream section included in the audio stream, transmitting the encoded first audio data to a first auxiliary device, and transmitting the encoded second audio data to a second auxiliary device after a time corresponding to a predetermined interval

Method and apparatus for transmitting and receiving audio data in bluetooth low energy-based wireless communication system

Abstract: A method for transmitting audio data by a master device in a Bluetooth Low Energy (BLE)-based wireless communication system is provided. The method includes configuring a data packet to include identification information indicating whether the audio data is included in a payload of the data packet and transmitting the data packet to at least one slave device.

Understanding the Performance of Bluetooth Mesh: Reliability, Delay, and Scalability Analysis

Abstract: This article evaluates the quality-of-service performance and scalability of the recently released Bluetooth mesh protocol and provides general guidelines on its use and configuration. Through extensive simulations, we analyze the impact of the configuration of all the different protocol’s parameters on the end-to-end reliability, delay, and scalability. In particular, we focus on the structure of the packet broadcast process, which takes place in time intervals known as Advertising Events and Scanning Events . Results indicate a high degree of interdependence among all the different timing parameters involved in both the scanning and the advertising processes and show that the correct operation of the protocol greatly depends on the compatibility between their configurations. We also demonstrate that introducing randomization in these timing parameters, as well as varying the duration of the Advertising Events , reduces the drawbacks of the flooding propagation mechanism implemented by the protocol. Using data collected from a real office environment, we also study the behavior of the protocol in the presence of WLAN interference. It is shown that Bluetooth mesh is vulnerable to external interference, even when implementing the standardized limitation of using only 3 out of the 40 Bluetooth low-energy frequency channels. We observe that the achievable average delay is relatively low, of around 250 ms for over 10 hops under the worst simulated network conditions. However, results prove that scalability is especially challenging for Bluetooth mesh since it is prone to broadcast storm, hindering the communication reliability for denser deployments.

Bluetooth Low Energy Mesh Networks: Survey of Communication and Security Protocols

Abstract: Bluetooth Low Energy (BLE) Mesh Networks enable flexible and reliable communications for low-power Internet of Things (IoT) devices Most BLE-based mesh protocols are implemented as overlays on top of the standard Bluetooth star topologies while using piconets and scatternets Nonetheless, mesh topology support has increased the vulnerability of BLE to security threats, since a larger number of devices can participate in a BLE Mesh network To address these concerns, BLE version 5 enhanced existing BLE security features to deal with various authenticity, integrity, and confidentiality issues However, there is still a lack of detailed studies related to these new security features This survey examines the most recent BLE-based mesh network protocols and related security issues In the first part, the latest BLE-based mesh communication protocols are discussed The analysis shows that the implementation of BLE pure mesh protocols remains an open research issue Moreover, there is a lack of auto-configuration mechanisms in order to support bootstrapping of BLE pure mesh networks In the second part, recent BLE-related security issues and vulnerabilities are highlighted Strong Intrusion Detection Systems (IDS) are essential for detecting security breaches in order to protect against zero-day exploits Nonetheless, viable IDS solutions for BLE Mesh networks remain a nascent research area Consequently, a comparative survey of IDS approaches for related low-power wireless protocols was used to map out potential approaches for enhancing IDS solutions for BLE Mesh networks

Method, apparatus, and computer program product for improving security for wireless communication

Abstract: In an example embodiment, a method includes receiving, by an apparatus, one or more wireless discovery messages; determining, by the apparatus, whether a wireless device is in close proximity to the apparatus based on information obtained from the one or more received wireless discovery messages; exchanging, by the apparatus, messages with the wireless device in response to having determined that the wireless device is in close proximity to the apparatus; measuring, by the apparatus, signal strength of the exchanged messages while distance changes to the wireless device; and determining, by the apparatus, whether changes in the measured signal strength of the exchanged messages satisfy a predetermined behavior expected for signal strength as distance varies.

Method of exchanging data packages of different sizes between first and second portable communication devices

Abstract: A method of exchanging data packages between first and second portable communication devices over a bi-directional wireless communication channel, where at least one of the first and second portable communication devices comprises a hearing instrument, includes: generating, by the first portable communication device, a plurality of data packages that includes a first data package, wherein a first subset of the plurality of data packages belongs to a first packet category comprising audio data, and a second subset of the plurality of data packages belongs to a second packet category without audio data; and transmitting the plurality of data packages from the first portable communication device to the second portable communication device; wherein a size of the data packages in the second subset belonging to the second packet category is smaller than a size of the data packages in the first subset belonging to the first packet category

Enabling concurrent proprietary audio and Bluetooth low energy using enhanced LE link layer for hearing device

Abstract: A battery-powered mobile device allows concurrent wireless transception of control data via standard Bluetooth low energy (BLE) and proprietary audio streaming, using the same physical layer of the radio. Following each BLE connection event, an enhanced link layer clocks a remaining duration of the current idle time period. Requests provided to the enhanced link layer include time slot information for the proprietary audio bursts. The enhanced link layer determines, based on the time slot information, whether each requested burst can be completed during the remaining duration of the current idle time period, appropriately linking payload information of each packet with the BLE control data stack or with a proprietary audio stack, with the BLE control data having priority over the proprietary audio requests.