Telefonaktiebolaget Lm Ericsson (publ)

Sten Wallin

Magnus Nilsson

Peter Jakobsson

Per Ingelhag

Torsten John Carlsson

Martin Isberg

Dandan Hao

Anders Elgcrona

Joakim Plahn

Peter Svensson

Stefan Hamrin

Stefan Rydback

Tommy Lindgren

Agneta Ljungbro

Örjan Renström

In an example embodiment, a system comprises a chain of serially coupled nodes, including a central processing node (CPN) and one or more radio communications nodes (RCNs). The CPN couples to a first RCN in the chain via a dielectric waveguide (DWG) link and any further RCNs in the chain are successively connected in serial fashion from the first RCN via further (DWG) links. The CPN generates outbound radio carrier signals that are waveguide-propagated in a downstream direction of the chain, for over-the-air (OTA) by targeted ones of the RCNs, while radio carrier signals received via OTA reception by respective ones of the RCNs are waveguide propagated as inbound radio signals in an upstream direction of the chain, for processing by the CPN. Advantages from he contemplated system include greatly simplified implementation of the RCNs, with lower cost and power consumption. Further, strategic placement of failover CPNs and DWG links provide for continued operation in the face of CPN or DWG link failures.

Method and apparatus for radio communications

There is disclosed a method of operating a radio node in a wireless communication network. The method includes communicating based on a signaling structure, the signaling structure pertaining to a time domain interval and comprising a plurality of symbol time intervals, wherein to each symbol time interval, there is associated one cyclic prefix interval of a cyclic prefix interval type of a set of at least two types, wherein a first type pertains to a cyclic prefix interval corresponding to a first number N of processing samples, and a second type pertains to a cyclic prefix interval corresponding to a second number M of processing samples, wherein M is larger than N, and wherein both N and M are multiples of a base factor B. The disclosure also pertains to related devices and methods.

Signaling structure for wireless communication network

Methods for determining calibration parameters to correct for frequency responses of one or more dielectric waveguides coupling a control unit to a first antenna node or to a series of antenna nodes that includes the first antenna node. An example method comprises transmitting, via a first dielectric waveguide coupling the control unit to the first antenna node, a radiofrequency (RF) test signal having a signal bandwidth covering a bandwidth of interest. The method further comprises receiving, via a second dielectric waveguide coupling the control unit to the first antenna node, a looped-back version of the transmitted RF test signal, and estimating a first one-way frequency response corresponding to the first (or second) dielectric waveguide, based on the RF test signal and the received loop-back version of the transmitted RF test signal.

Dielectric waveguide signal transfer function compensation

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Enskede, Sweden

Sten Wallin