Abstract:
A method for managing a full duplex mobile telecommunication network, comprising: - having a base station (BS(1)) measuring (205) the power of downlink transmissions received by said base station from adjacent base stations (BS(2)); - having said base station (BS(1)) measuring (210) the power of uplink transmissions received by said base station from at least one served user equipment (UE(1), UE(2), UE(3), UE(4)); - having said base station (BS(1)) comparing (215) the measured power of downlink transmissions with the measured power of uplink transmissions; - if the measured power of an uplink transmission from a served user equipment is lower than the measured power of downlink transmissions by a corresponding amount, carrying out the following operation: - having said base station (BS(1)) allocating (255) for the uplink transmission from said served user equipment, corresponding first dedicated uplink radio resources, said first dedicated uplink radio resources being radio resources which are reserved only for uplink transmission, said first dedicated uplink radio resources, when allocated to said base station (BS(1)), being not usable for downlink transmissions by further base stations (BS(2)) adjacent to said base station (BS(1)), and - having said base station (BS(1)) assigning said allocated first dedicated uplink radio resources to said served user equipment for uplink transmission from the served user equipment toward said base station (BS(1)).
Abstract:
A method of arranging exchange of signals between user terminals (UE) in a cellular communication system and at least one base station including a central unit (CU) and a plurality of remote units (RU). The method includes exchanging signals with at least one user terminal (UE) simultaneously via at least two remote units (RU) by applying at the at least two remote units (RU) separate distributing weighting functions to the signals exchanged with the at least one user terminal (UE).
Abstract:
Signals received (14, 16) from channels exposed to multi-path propagation via a plurality of diversity antennas (12) and comprising at least one pilot signal are processed by detecting (18) a set of multi-path components for each of the received signal and computing (22) a set of channel coefficients from multi-path components of the at least one pilot signal in the set of multi-path components, wherein the set of channel coefficients is organized as a channel coefficient vector. From said channel coefficient vector, a set of combining weights (w) is estimated (22) to be applied (24) to the received signals by: - computing (22) a spatial correlation matrix of the channel coefficient vector by neglecting the correlations between multi-path components of the channel coefficient vector having different delays, whereby the correlation matrix is a block diagonal matrix comprising null coefficients other than for non-null sub-matrixes arranged along the diagonal of said correlation matrix, wherein said sub-matrixes have a size equal to the number of diversity antennas; - deriving (22) from the spatial correlation matrix a resulting matrix by calculating the inverse of said sub-matrixes or a scaled version thereof; and - multiplying (22) the resulting matrix and the channel coefficient vector in order to obtain the desired set of combining weights (w).
Abstract:
A wireless communication system, wherein a sub-set of RF signals received from corresponding antenna elements (A111AN) is selected and combined (8) into a single RF signal, the single RF signal being processed and demodulated in a single processing chain (10), comprising a RF phasing network (18) for co-phasing the selected RF signals before combining and a processor (16) for controlling combining (8) and phasing (18) in order to obtain a single RF signal having a radio performance indicator (RPI) which satisfies predetermined conditions.
Abstract:
It is described a method for interpolating between a first (A) and a second point (B), said method comprising the steps of calculating a first distance (Δx) between a first (x A ) and a second (x B ) independent value and a second distance (Δy) between a first (y A ) and a second (y B ) dependent value, right shifting said first (Δx) and said second (Δy) distances by a predetermined number of bits (L) for obtaining respectively a hold step (1x) and a variations step (1y) and generating a number (N) of interpolated points, having independent values comprised between said first (x A ) and said second (x B ) independent values and corresponding dependent values obtained by alternating hold and variations phases, wherein said hold phase consists in generating a number of points corresponding to said hold step (1x)having the same dependent value, and wherein said variations phase consists in varying the dependent value by said variations step (1y), until said number (N) of interpolated points has been calculated. The method is particularly suitable for channel estimation in communication systems.
Abstract:
A system for performing channel estimation based on a received signal including both known (KS) and unknown (UKS) transmitted symbols, includes detector circuitry (CK1, ..., CKP,L; CM, DU) for detecting the unknown symbols (UKS) by assigning estimated values (EAS) to the unknown symbols, and channel estimator circuitry (M) for performing channel estimation by exploiting both the known symbols (KS) and the estimated values (EAS) assigned to the unknown symbols (UKS). The system has associated multiple receiving antennas. The system is preferably included in a CDMA receiver and the received signal includes known pilot bits (KS) and additional symbols, such as transmit power-control (TPC) commands, feedback information for transmitting antenna diversity, and a transport-format combination indicator (TFCI) that comprise the unknown symbols (UKS).
Abstract:
A method for the estimation of the transfer function of a transmission channel in a receiving system of UMTS type envisages the computation of a plurality of channel coefficients, included among known channel coefficients corresponding to pilot symbols, through the reiteration of an interpolation algorithm, capable of calculating an intermediate point (Z, f(Z)) between a first extreme and a second extreme of a determined interval, the first extreme being formed by at least two known points and the second extreme being formed by at least one known point, the intermediate point to be calculated having as abscissa (Z) the abscissa value of the mean point between the points defining the interval rounded off to the integer closest to the first extreme, and having as ordinate (F(Z)) the arithmetic average between the ordinate of the known point of the second extreme and the ordinate of a point, chosen between the two known points of the first extreme, having a distance from the intermediate point equal to the distance between the intermediate point and the known point of the second extreme.
Abstract:
An iterative receiver (200) is proposed for receiving a signal (y = [y 1 y 2 ] T ) including useful and interfering signal components, and for detecting information carried thereon. The receiver (200) comprises: at least one estimating unit (210 1 ,210 2 ) for receiving said signal (y = [y 1 y 2 ] T ) and for providing an estimate Formula (I) of each signal component, at least two decoding and regenerating units (205 1 ,205 2 ,205 3 ,205 4 ), at each iteration each decoding and regenerating unit (205 1 ,205 2 ,205 3 ,205 4 ) being arranged for decoding a respective one among said estimates Formula (I), and for regenerating the respective decoded estimate into a respective regenerated estimate Formula (I), at each iteration of said receiver (200) said at least one estimating unit (210 1 ,210 2 ) providing said estimates Formula (I) also based on the regenerated estimates Formula (I) provided at a previous iteration, and a control unit (CU) for determining activation or deactivation of each decoding and regenerating unit (205 1 ,205 2 ,205 3 ,205 4 ) at each process step of a detection process dedicated to detection of said signal (y = [y 1 y 2 ] T ), and for determining, for each process step, a respective number of allowed iterations for each decoding and regenerating unit (205 1 ,205 2 ,205 3 ,205 4 ) whose activation has been determined for that process step, each number of allowed iterations being determined according to radio measurements of the signal components and such that an overall number of allowed iterations over the detection process does not exceed a maximum allowed number of iterations.
Abstract:
A method of downloading a multimedia content from a server (110) to a client (105) through a wireless communication network (100) is proposed. The multimedia content is subdivided into a plurality of portions (ck i ) and for each portion the server storing a plurality of versions ( seg i,j ) thereof each of which is encoded with a specific encoding quality ( br i,j ) . The method comprises: selecting, among the plurality of versions ( seg i,j ) of each portion ( ck i ) of the multimedia content, a version ( seg i,j ) of said portion ( ck i ) of the multimedia content to be downloaded on the basis of wireless communication parameters determined at at least two different layers of a wireless communication network OSI protocol stack at the client (105).
Abstract:
A method is proposed of arranging, in a mobile communication network (100), transmission of data (S* INFO i,n , S* CTRL n ) between user equipments (UE i ) and at least one base station (BS) comprising a central unit (CU) and at least one remote unit (RU j ) associated therewith, wherein said data (S* INFO i,n , S* CTRL n ) comprise information data (S* INFO i,n ) and control data (S* CTRL n ) from the central unit (CU) to the at least one remote unit (RU j ), or from the at least one remote unit (RU j ) to the central unit (CU). The method comprises: allocating (115) radio resources for said data (S* INFO i,n , S* CTRL n ) to/from the at least one remote unit (RU j ), grouping (120) the allocated radio resources (P PRB p ) into allocated radio resources groups ( AG g,n ) each one comprising at least one radio resource (P PRB p ) allocated for data (S* INFO i,n , S* CTRL n ) to/from a respective remote unit (RU j ), including (120) in each allocated radio resources group ( AG g,n ) association data ( A SS D ) indicative of an association of the at least one allocated radio resource (P PRB p ) of that allocated radio resources group ( A G g,n ) with the respective remote unit (RU j ), including (120) in each allocated radio resources group ( AG g,n ) allocation data ( A LL D ) indicative of the allocated radio resources (P PRB p ), among said at least one allocated radio resource (P PRB p ), that have been allocated at least for the information data (S* INFO i,n ), and transmitting said allocated radio resources groups ( AG g,n ) in the frequency-domain between the central unit (CU) and the at least one remote unit (RU j ).
Abstract translation:提出了一种在移动通信网络(100)中布置用户设备(UE i)和至少一个基站(BS)之间的数据传输(S * INFO i,n,S * CTRL n)的方法,该基站包括 中央单元(CU)和与其相关联的至少一个远程单元(RU j),其中所述数据(S * INFO i,n,S * CTRL n)包括信息数据(S * INFO i,n)和控制数据 * CTRL n)从中央单元(CU)到至少一个远程单元(RU j)或从至少一个远程单元(RU j)到中央单元(CU)。 所述方法包括:向所述至少一个远程单元(RU j)分配(115)所述数据(S * INFO i,n,S * CTRL n)的无线电资源(RU),分配(120)所分配的无线电资源(PPRB p)分配给分配给无线电资源组(AG g,n)的每个无线电资源组(AG g,n),每个无线电资源组包括分配给数据的至少一个无线电资源(PPRB p)到相应的远程单元(RU)上的数据(S * INFO i,n,S * CTRL n) j),包括指示所分配的无线电资源组(AGR,p)与所分配的无线资源组的所述至少一个分配的无线电资源(PPRB p)的关联的每个分配的无线电资源组(AG g,n)关联数据(A SS D)中的(120) 包括在所分配的无线电资源组(AG g,n)中指示所分配的无线电资源(PPRB p)的分配数据(A LL D)的所述相应的远程单元(RU j),包括(120) 至少一个已经分配给信息数据(S * INFO i,n)的分配的无线电资源(PPRB p),并且将所分配的无线资源组(AG g,n)发送到 中央单元(CU)和至少一个远程单元(RU j)之间的频域。