Abstract: The invention relates to a method for wireless cellular indoor communications, the method comprising at least one base station connected to a cell management unit through a first digital connection interface, the cell management unit connected to at least one RF hub through a second digital connection interface, and the at least one RF hub connected to at least one remote radio head through a third digital connection interface, the at least one remote radio head providing service in a certain cell area inside a confined environment, and the cell management unit comprising means for providing efficient load balancing at and between base stations through adaptive cell reconfiguration; means for mapping carriers, time, frequency or time-frequency allocations to individual radio heads; means for alignment of individual delays accumulated on the digital connections between the cell management unit and each of the radio heads; means for synchronization of the signals between the cell management unit and the individ

Abstract: The present invention relates to a method for performing resource allocation to a mobile terminal (12) in a wireless communication network (10), said wireless communication network (10) comprising a plurality of base stations (BS0-BS12). The method comprises the steps of measuring link quality of one or more wireless links (14) in between said mobile terminal (12) and one or more of said plurality of base stations (BS0-BS12), allocating wireless resources to said mobile terminal (12) in one or more serving sectors, said serving sectors being one or more of said plurality of sectors (SEC0.0, SEC0.1, SEC0.2, SEC0, SEC1.0, SEC1.1, SEC1, SEC2.0, SEC2.1, SEC2, SEC3-SEC12) in one or more of said plurality of cells (C0-C12). The invention further relates to a plurality of base stations for performing said method and a wireless communication network (10) comprising said plurality of base stations.

Abstract: The invention relates to a method for wireless cellular indoor communications, the method comprising at least one base station connected to a cell management unit through a first digital connection interface, the cell management unit connected to at least one RF hub through a second digital connection interface, and the at least one RF hub connected to at least one remote radio head through a third digital connection interface, the at least one remote radio head providing service in a certain cell area inside a confined environment, and the cell management unit comprising means for providing efficient load balancing at and between base stations through adaptive cell reconfiguration; means for mapping carriers, time, frequency or time-frequency allocations to individual radio heads; means for alignment of individual delays accumulated on the digital connections between the cell management unit and each of the radio heads; means for synchronization of the signals between the cell management unit and the individ

Abstract: The present invention relates to a method for improving inter cell interference cancellation in an cellular radio communication system, said cellular radio communication system sending OFDM frames on an air interface, each OFDM frame comprising a pilot tones part and a payload part comprising a plurality of bursts According to the present invention the method comprises the steps of: building a predefined number of sets of cells in said cellular radio communication network; associating a predefined OFDM symbol of said OFDM frames to each set of cells, at least two different sets of cells being associated two different OFDM symbols of said OFDM frame, sending from a station belonging to a predefined set of cells a set of pilot tones in said predefined OFDM symbol associated to said set of cells.

Abstract: The present invention relates to a method for performing resource allocation in a radio communication system, said radio communication system being dedicated to send frames on an air interface, each frame comprising a plurality of bursts. According to the present invention, the method comprising the step of: Sorting the bursts to be contained in said frame by depending on a parameter related to the size of the resource allocated to said bursts; Performing said resource allocation depending on said sorting; Transmitting said frame in said radio communication system.

Abstract: The present invention relates to a method for improving inter cell interference cancellation in an cellular radio communication system, said cellular radio communication system sending OFDM frames on an air interface, each OFDM frame comprising a pilot tones part and a payload part comprising a plurality of bursts. According to the present invention, the method comprising the step of: Sending on a sub channel a first set of pilot tones by the station sending a burst on said sub channel; Sending additionally in said frame and on said sub channel a second set of pilot tones by an additional station when a burst sent by said additional station starts on said sub channel.

Abstract: A radio access network, wherein the RAN comprises a plurality of base stations and a base station controller, wherein the BSC allocates radio resources (space, time, frequency, energy) of a resource domain, and wherein each base station may handle within a corresponding base station area a plurality of subscriber stations, is characterized in that each base station area is statically divided into a plurality of spatial subsectors, that a subset of the time-frequency domain of the resource domain is allocated to each of the subsectors, that the base stations collect traffic information for each subsector belonging to their respective base station area, the traffic information comprising interference conflict scenarios and traffic load, that the base stations summarize the traffic information for each subsector belonging to their respective base station area, that the base stations provide the base station controller with said summarized traffic information for each subsector belonging to their respective base

Abstract: The invention relates to a method and a system for improving the quality of a radio signal, particularly for systems according to the IEEE 802.16 standard. In the case of a wireless transmission of radio signals the signals often doesn't reach the receiver in a direct way, but are scattered and reflected at various objects. This leads to the reception of multipath signals with different phases and amplitudes which interfere and decrease the signal quality. In addition, signals from external sources reach the receiver and interfere with the radio signal. It is suggested that the receiver analyses incoming signals and determines whether the additional signal is a multipath signal or stems from an external source. In the first case a constructive interference of the radio signal with the additional signal is arranged. In the second case the additional signal is subtracted from the radio signal.

Abstract: An optical component comprising an optical waveguide and adjacent to it at least one grating array adapted to reflect stray light away from said optical waveguide. The use of a grating array with a plurality of structures like polygons or stripes gives the possibility to define a multiple of reflection directions. This is obtained by using polygons layed out in different orientations up to a random one or a Bragg grating preferably defined with a non-uniform period (chirped). Such grating arrays are usually structured within the same layer as the optical waveguide core layer.

Abstract: The invention is an optical device having a plurality of optical waveguides and comprising at least one waveguide, which is defined by a core region having first and second sections that are series connected and are capable of transmitting light energy, the core region being surrounded by a cladding that essentially confines the light energy within the core region, the first section of the core region comprising a first length of material whose refractive index increases as temperature increases; the at least one waveguide is temperature-compensating in that and the second section of the core region comprises a second length of material whose refractive index has a sufficient enough difference of the rate of the variation of the index with the temperature, wherein the second section has a plurality of grooves, filled with the material whose refractive index has a sufficient enough difference of the rate of the variation of the index with the temperature, that are designed in a way the effective width of the s

Abstract: The invention relates to a method of forming a semiconductor component comprising the steps of: providing a semiconductor substrate, forming a pattern of pores in the semiconductor substrate, the pores having a first depth, photoassisted wet etching of the substrate for etching of the pores to a second depth, the second depth being substantially greater than the first depth.

Abstract: An optical component comprising an optical waveguide and adjacent to it at least one grating array adapted to reflect stray light away from said optical waveguide. The use of a grating array with a plurality of structures like polygons or stripes gives the possibility to define a multiple of reflection directions. This is obtained by using polygons layed out in different orientations up to a random one or a Bragg grating preferably defined with a non-uniform period (chirped). Such grating arrays are usually structured within the same layer as the optical waveguide core layer.

Abstract: The invention is an optical device having a plurality of optical waveguides and comprising at least one waveguide, which is defined by a core region having first and second sections that are series connected and are capable of transmitting light energy, the core region being surrounded by a cladding that essentially confines the light energy within the core region, the first section of the core region comprising a first length of material whose refractive index increases as temperature increases; The at least one waveguide is temperature-compensating in that and the second section of the core region comprises a second length of material whose refractive index has a sufficient enough difference of the rate of the variation of the index with the temperature, wherein the second section has a plurality of grooves, filled with the material whose refractive index has a sufficient enough difference of the rate of the variation of the index with the temperature, that are designed in a way the effective width of the s

Abstract: The invention relates to a method of forming a semiconductor component comprising the steps of: