Erik Bengt Lennart Dahlman

Title: Erik Bengt Lennart Dahlman: Innovating Communication Networks

Introduction:

In the realm of communication technology, certain individuals stand out due to their groundbreaking inventions and contributions to the industry. Erik Bengt Lennart Dahlman, a talented inventor based in Bromma, SE, is one such individual. Working for the renowned company Telefonaktiebolaget LM Ericsson, Dahlman has successfully obtained two patents and has significantly influenced the evolution of cellular communication networks. Let us explore his innovative patents and shed light on his noteworthy achievements.

Patent 1: System and Method for Adaptive Broadcast Service

Dahlman's first patent, "System and Method for Adaptive Broadcast Service," outlines a revolutionary approach to enhancing broadcast services within cellular communication networks. The system described in this patent enables a base station to adapt transmission parameters dynamically based on the indications of channel quality received from registered users of the broadcast service. These adaptations are aimed at improving channel quality for users who express a need for improvement. Conversely, if none of the broadcast users indicate a need for enhanced channel quality, the system adapts the transmission parameters to decrease channel quality. Adaptive techniques such as varying broadcast transmit power, adjusting FEC encoding and modulation levels, allocating channel resources differently, and modifying transmission data rates are employed to achieve optimal performance. Moreover, multiple base stations can work in coordination, minimizing network resource utilization and optimizing overall performance.

Patent 2: Method and System for Facilitating Timing of Base Stations

Dahlman's second patent, titled "Method and System for Facilitating Timing of Base Stations in an Asynchronous CDMA Mobile Communications System," addresses the challenges of managing base station timing in asynchronous Code-Division Multiple Access (CDMA) networks. In this invention, a plurality of mobile stations (MSs) measure the relative time differences between various pairs of base stations (BSs). These measurements are stored by the BSs to allow for an accurate estimation of relative timing offset between them. By sending this information to MSs, the cell-search procedure is expedited, resulting in reduced complexity and faster connection establishment. Additionally, this patent facilitates the calculation of signal propagation delays between MSs and BSs, providing a means for determining MS positions.

Conclusion:

Erik Bengt Lennart Dahlman, through his exceptional work within Telefonaktiebolaget LM Ericsson, exemplifies the spirit of innovation and forward-thinking in the field of communication networks. With his two patents, he has played a pivotal role in improving broadcast service quality and enhancing the synchronization of base stations in CDMA networks. Dahlman's collaboration with coworkers like Gregory Edward Bottomley and Ali S Khayrallah underlines the collective efforts driving technological advancements within the company. His contributions continue to shape the industry and inspire future inventors and innovators in the field of cellular communication networks.