UA102102C2 - Spatial interference mitigation for wireless communication - Google Patents

Abstract

Techniques for transmitting and receiving data with spatial interference mitigation in a wireless network are described. In one design of transmitting data with spatial interference mitigation, a first station (e.g., a cell) may receive spatial feed-back information (SFI) from a second station (e.g., an interfered UE) that is not communicating with the first station. The second station may also receive precoding information from a third station (e.g., a served UE). The first station may send a data transmission to the third station based on the precoding information and the SFI in order to reduce interference to the second station. In one design, the SFI may include spatial nulling information. The first station may send the data transmission based on the spatial nulling information to steer the data transmission in a direction away from the second station.

Description

Fig. 4 - uplink data transmission with spatial interference suppression.

Fig. 5 and 6 - process and device, respectively, for data transmission with spatial interference suppression.

Fig. 7 and 8 - process and device, respectively, for receiving data with spatial interference suppression.

Fig. 9 - block diagram of the base station and OE.

Detailed description

The methods described here can be used for various wireless networks, such as

SOMA, TOMA, ROMA, BOMA, 50-BOMA and other networks. The terms "network" and "system" are often used interchangeably. The SOMA network can implement radio technology such as Universal Terrestrial Radio Access (UTRA), sata2000, etc. OTKA includes a system of broadband

SOMA (MUSOMA) and other variants of SOMA. sata2000 covers standards I5-2000, 15-95 and I5-85. Chain

TOMA can carry radio technology, such as the global system of communication with mobile objects (OM). The BOMA network can carry radio technology such as Emoimea OTKA (E-OTAA), Sha

Mobiiee Vgoadbrapa (MV), IEEE 802.11 (M/I-Ri), IEEE 802.16 (MUIMAH), IEEE 802.20, Riazp-OBOM, etc.

OTEA and E-OTKA are part of the universal mobile communication system (ShMT5). Systems ZORR Hopd

Tept Emoishiop (STE) and STE-Admapsea (I TE-A) are new editions of OMT5 that use E-OTVA.

TVA, B-OTAA, OMT5, I TE, I TB-A and O5M are described in the documents of the organization called "3rd Generation Partnership Project" (ZORR). sata2000 and YUOMV are described in the documents of the organization called "Project 2 of the 3rd Generation Partnership" (ZORR2). The methods described herein may be used for the wireless networks and radio technologies mentioned above, as well as for other wireless networks and radio technologies. For clarity, specific aspects of the methods are described below for AND TE and TE terminology is used throughout much of the description below.

In fig. 1 shows a wireless communication network 100, which may be an ITE network or some other network. The wireless network 100 may contain numerous enhanced nodes B (emB) and other network objects. For simplicity in fig. 1 shows only two eMV nodes, 110a and 1105. An eMV node can be a station that communicates with the ESR, and may also be referred to as a base station, node B, access point, etc. Each eMV node 110 can provide coverage communication for a specific geographical area. In ZORR, the term "cell" may belong to the coverage area of an eMMV node and/or to the subsystem of an eMMV node that serves this coverage area, depending on the context in which the term is used.

The emMmV node can provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other cell types. A macrocell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unlimited access for

ESR with subscriber service. A picocell can cover a relatively small geographic area and can allow unlimited access for subscriber-based SES. A femtocell may cover a relatively small geographic area (eg, a home) and may allow limited access for UEs communicating with the femtocell (eg, UEs for home users). An eMV node for a macrocell may be referred to as a macro-eMMV. An eMMV node for a picocell may be referred to as a pico-emV. An eMMV node for a femtocell may be referred to as a femto-eMMV or a home eMMV. In the example shown in fig. 1, the eMMV node 110a may be a macro-eMMV node for a macrocell X. The eMMV node 11056 may be a pico-eMMV node for a picocell M or a femto-eMMV node for a femtocell U. The eMMV node may support one or a plurality (eg, three) of cells.

Wireless network 100 may also include relay stations. A relay station is a station that receives transmission of data and/or other information from a station on an uplink communication channel (for example, from an eMV or PE node) and sends data and/or other information to a station on a downlink communication channel (for example, on SE or to the eMV node). A relay station can also be an ESO that relays transmissions for other ESOs.

The wireless network 100 may be a homogeneous network that contains eMmV nodes of the same type, for example, only macro-eMmV or only femto-eMmV. The wireless network 100 may also be a heterogeneous network that contains different types of eMV nodes, such as macro-emV, pico-eMV, femto-eMV, relay stations, etc. These different types of eMV nodes may have different transmission power levels, different coverage areas and different effects on interference in a wireless network 100. For example, macro-eMV may have a high level of transmit power (eg, 20 Watts), while pico-eMv, femto-emV, and relay stations may have a lower level of transmit power ( for example, 1 Watt).

The methods described here can be used for both homogeneous and heterogeneous networks.

The network controller 130 can connect to a number of eMv nodes and provide coordination and control of these eMv nodes. The network controller 130 can communicate with the eMV nodes 110 through the transit module. Nodes eMV 110 can also communicate with each other, for example, directly or indirectly through a wired or wireless transit module.

SHEs may be distributed throughout the wireless network 100 and each SHE may be stationary or mobile. For simplicity, in fig. 1 shows only four SHE, 120a, 1205, 120s and

WITH

1204, and they are also referred to as SHE 1, 2, C and 4, respectively. A UE may also be referred to as a terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular telephone, a wireless minicomputer (ROSA), a wireless modem, a pocket computer, a notebook computer, a cordless telephone, by a wireless subscriber access station (WSA), etc. In fig. 1 solid line with a single arrow indicates desired data transmission from the serving cell to the ME, and dashed line with a single arrow indicates interfering transmission from the interfering cell to the UE. A serving cell is a cell designed to serve UEs on the downlink and/or uplink line (channel) of communication. A non-serving cell may be an interfering cell that interferes with downlink ESR and/or an interference-affected cell that observes interference from uplink ESR.

Transmissions on the uplink of Fig. 1 are not shown for simplicity.

GTE uses orthogonal frequency-division multiplexing (FDM) on the downlink and single-carrier frequency-division multiplexing (CDF) on the uplink FDM and 5C-REOM divide the system bandwidth into a set (K) of orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.

Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain using OROM and in the time domain using 5C-ECM. The total number of subcarriers (K) may depend on the bandwidth of the system. For example, K can be 128, 256, 512, 1024, or 2048 for a system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), respectively. The system bandwidth can also be divided into subbands, and each subband can cover 1.08 MHz.

In I TE, the transmission time schedule for each link can be divided into blocks of subframes.

Each subframe may have a specified duration, such as 1 millisecond (ms), and may contain two time slots. Each time slot can contain six symbol periods for an extended cyclic prefix or seven symbol periods for a normal cyclic prefix. Available frequency and time resources for each communication channel can be divided into resource blocks. Each block of resources can cover a specific time and frequency dimension, for example, 12 subcarriers in one time interval in IG.TE.

An ESR may communicate with a serving cell in a basic interference scenario, which is a scenario in which () the ESR may experience high interference from one or more interfering downlink cells and/or (ii) the serving cell may experience high interference from side of one or more interfering ESRs on the upstream channel. The main interference scenario can occur due to range extension, which is a scenario in which the UE connects to a cell with lower path loss and lower geometry among all cells detected by the UE. For example, in fig. 1 CE 2 can detect macrocell X and picocell Y and may have a lower reception power for picocell Y than for macrocell X. However, it may be desirable for CE2 to connect to picocell Y if the path loss for cell XU is lower than path loss for macrocell X. This can result in less interference in the wireless network for a given data rate for UE 2. The main interference scenario can also occur due to limited communication. For example, in fig. 1 ESR 1 may be close to femtocell U and may have high reception power for this cell. However, CE 1 may not be able to access the femtocell Y due to the limited connection and may then connect to the unconstrained macrocell X with a lower reception power. UE 1 may then observe high interference from femtocell U on the downlink and may also cause high interference to cell U on the uplink.

Alternatively, spatial interference suppression may be performed for downlink data transmission to reduce interference to the UE. In one project, the ESR can identify and provide spatial feedback (SFR) information for the interfering cell. The interfering cell can send its transmission based on 5REI to reduce the interference to the UE.

The following types of information may be available:

Spatial feedback information - information used to reduce interference for a station exposed to interference,

Information for spatial zeroing - information used to select the direction of transmission away from the station affected by the interference,

Precoding information - information that is used to direct the transmission in the direction of the target station, and

Null gain information - information that indicates interference reduction due to spatial interference suppression.

For spatial downlink interference suppression, the 5EI may contain (i) spatial zeroing information for the interfering cell, which can be used by that cell to direct its transmission away from the ESR, (ii) precoding information for the serving cell for the ESR, which can be used by the interfering cell to direct its transmission away from the serving cell to the SE, (ii) gain information for zeroing, and/or (im) other information. Different types of information for 5PRI can be defined as described below.

In one design, the UE may estimate the downlink characteristic of the interfering cell based, for example, on a reference signal or a pilot signal sent by the cell on the downlink. The evaluation of the downlink communication channel can be represented by the channel matrix K x Xt as: pocha 0-0 th pPoya Pro» 0-0 Pot

Well - ! (1) pi Pd o. Tue where No; - the channel matrix for the downlink channel from the interfering cell to the SE and,

Pa for гГ-1,..., К, ииТ-1,..., Т, is the Complex gain coefficient between the transmitting antenna и in the interfering cell and the receiving antenna г in the ESR,

T is the number of transmitting antennas in the interfering cell, i

B - the number of receiving antennas in OB.

The channel matrix No contains K rows for KE receiving antennas in SOE. Each row Nih corresponds to one channel vector Nis for one receiving antenna in the SHE. If the CE is equipped with a single antenna, then Ni contains a single row for a single channel vector. A matrix can thus degenerate into a vector for which there is only one row or one column. The downlink estimate can be obtained for all or part of the system bandwidth, for example, for a sub-band in which the SES may be planned to operate.

In the first draft of the EI, the ZEI may contain a channel direction indicator (CDI) for the interfering cell. SOY for interfering honeycomb can be defined in different ways. In one design, OE can quantize Ni based on the codebook of quantized channel matrices. OE can evaluate each quantized channel matrix in the codebook as follows:

They are Inani (d) where H-I-a is the quantized channel matrix in the codebook,

On, - a metric indicator of orthogonality between N. and Ni, and "n" means a Hermitian or complexly connected element.

The metric On, and can be computed for each quantized channel matrix in the codebook.

The quantized channel matrix Nu that has the largest On and corresponds to the No" as closely as possible can be selected and provided as the SOI for the interfering cell. The Nis channel matrix can thus be quantized into Ni, which is maximally correlated with Ni' (rather than maximally orthogonal to Ni). In another design, the AE can quantize each No line) based on a codebook of quantized channel vectors, and can obtain a quantized channel vector for each No line... The AE can also quantize the No in other ways. The size of the codebook of the quantized channel matrices or vectors can be chosen to obtain a good nulling rate while reducing overhead. The SOI for the interfering cell may contain the index of the quantized channel matrix, the index of each quantized channel vector, and/or other information. The UE can send SOI as a UE to the interfering cell. Since the reported No indicates the direction from the interfering cell to the CE, the interfering cell can choose the precoding matrix to be as orthogonal as possible to the No in order to reduce the interference on the CE.

In the second design from RII, 5EI may contain a precoding matrix indicator (PRM) for the interfering cell. The RMI for an interfering cell can be defined in different ways. In one design, the SHE may select a precoding matrix from a codebook of precoding matrices that is, as far as possible, orthogonal to No. SHE can evaluate each pre-coding matrix in the codebook as follows: ов; -|ny| h) where Rie is the 1st pre-coding matrix in the codebook, and

Ori is a metric indicator of orthogonality between R. and Nu.

SHE can choose the precoding matrix that has the smallest Ov and is the most orthogonal to Ni. The ESR may send the index of this precoding matrix as 5REI to the interfering cell. The selected pre-coding matrix may contain the "best" set of linear combinations of effective antennas, resulting in the greatest reduction of interference on the UE.

In another design, SHE can compute a precoding matrix Ri that is as orthogonal as possible to Nish. OE can perform eigenvalue expansion as follows:

NINY-ELE (3 where E is the unitary matrix THTtT of the eigenvalue vector Ni and

A is the diagonal matrix of TxHT eigenvalues No.

The unitary matrix E is characterized by the property of EN E-1, where I is a unit matrix. The columns of E are orthogonal to each other and each column has unit power. The downlink channel from the interfering cell to the SE has 5 eigenmodes, where Z«tipK, T). Columns T in matrix E are referred to as vectors T of eigenvalues and can be used to send data on eigenmodes Ni.

The diagonal elements of the L matrix are the eigenvalues, which represent the amplification factors in terms of the power of the Nish eigenmodes. The diagonal elements T of the matrix LL are related to the eigenvectors T of the matrix E. If K-T, then LL can contain up to K nonzero diagonal elements and zeros for other diagonal elements. The eigenvectors in the matrix E corresponding to zero diagonal elements in

A, are orthogonal to Nis and can be entered into the matrix Ri» of pre-coding. The SHE can quantize the RIs (e.g. as described above for Neal) to obtain 5RIs for the interfering cell.

The ESR can send a 5RU to the interfering cell, which can then select a precoding matrix to match the quantized Ru as much as possible to reduce the interference to the ESR.

In yet another design, the WAN may be equipped with multiple receiving antennas and may determine a precoding matrix for the interfering cell, taking into account its ability to null upon reception. The CE can derive the spatial filter matrix based on the channel matrix for the serving cell. The UE can then perform spatial processing of the transmission from the serving cell for the receiver using the spatial filter matrix. The OE can evaluate each precoding matrix in the codebook, assuming that the spatial filter matrix will be used in the SES. The AE can select a precoding matrix capable of providing the best receiver performance using the spatial filter matrix. The UE may provide the selected precoding matrix as the 5RPI for the interfering cell.

In the third draft of ZEII, 5ZEII for the interfering cell may contain SOI or RMI for the serving cell. The UE can estimate the downlink for the serving cell and can determine the SOI or PMI based on the downlink Carrier matrix for the serving cell. The SOI may contain the index of the quantized channel matrix, the index of each quantized channel vector, etc. The PMI may contain the index for the pre-coding matrix or vector to be used by the serving cell for the UE, etc. The UE may send the EOI or PMI for the serving cell as 5EI for interfering cell. Since the serving cell's SOI/RMI indicates the direction from the serving cell to the OE, the interfering cell can choose the precoding matrix to be as orthogonal as possible to the serving cell's SOI/RMI to reduce interference to the ESR. For example, an interfering cell can schedule an EB that can be minimally disturbed by the beam selected by the serving cell.

In another design, the 5EI for the jamming cell may contain a number of orthogonal vectors that may provide some spatial processing for the receiver on the SHE. For example, 5RI may contain one or more vectors that may be orthogonal to one or more principal eigenvectors of the channel matrix No, which may be obtained as shown in equation (4). As another example, a certain spatial processing for the receiver may be adopted for the SHE when transmitting data from the serving cell. The ZERIES may then contain one or more vectors that may be orthogonal to the active channel between the transmit antennas at the interfering cell and the spatial processing outputs for the receiver at the SHE.

In general, the spatial zeroing information for the interfering cell may contain SOI or

RMI for the interfering cell, SOI or RMI for the serving cell and/or some other information. The interfering cell can use the spatial nulling information to determine a precoding matrix that can direct its transmission away from the direction at the PE.

In one design, the 5RPI may contain a transmit null gain (TM) resulting from the interfering cell's application of the spatial null information provided by the UE.

The ESR can estimate (i) the interference power of the ISEI from the interfering cell when this cell applies information for spatial zeroing and (ii) the interference power of the IS. from the interfering cell when this cell does not apply information for spatial zeroing (or working open circuit). The SHE can determine the gain for transmission zeroing as the ratio of ISEI to IOI. The transmit zeroing gain can thus indicate the amount of interference power reduction from the interfering cell if the spatial zeroing information is used by that cell instead of open-loop transmission.

The interfering cell can determine the transmit power level to use to obtain the target interference level on the SE. The interfering cell may be able to increase this transmit power level by means of a transmit null gain when the cell applies the spatial null information.

In another design, the ZEI may contain a receive null gain (RGN) for the interfering cell, which is the result of the spatial processing ESR for the receiver of the serving cell. This design may be particularly applicable if the interfering cell is equipped with a single transmit antenna and is unable to perform direction selection for spatial nulling. The receive null gain may indicate the amount of interference power reduction due to performing CE spatial processing for the receiver and may be determined as described below. The interfering cell can then determine its transmit power level based on the receive null gain to, for example, achieve a target interference level on the SE. The gain factor for receive nulling can also be factored within the target interference level for the ESR. An interfering cell may not need to know the value of the receive null factor, but rather needs to know the target interference level for the ESR.

The UE can send 5BI to the interfering cell to support spatial interference suppression. The SREI may contain the SOI or RMI for the interfering cell, the SOI or RMI for the serving cell, the gain factor for zeroing during transmission and/or other information. In one project

The ESR can send 5RPI directly to the interfering cell. In another design, the SHE can send 5P1I to the serving cell, which can send 5 to the interfering cell, for example, through level C (3) signaling, the exchange of which is performed through the transit module. SHE can send 5P1Y at a fairly high speed, which may depend on the mobility of OE and possibly other factors.

For example, the UE may send 5PRI at a higher rate to the interfering macrocell to allow zeroing when that cell transmits in a low mobility state for the UE. The UE can send 5BRI at the slower rate of the interfering pico- or femtocell in the static or quasi-static condition of the UE. The OE may also send 5EIs each time it is needed, as described below. In general, the 5REI should match a relatively fresh channel estimate to get a good null when transmitting.

In another aspect, spatial interference suppression may be performed for uplink data transmission to reduce interference to cells. Spatial interference suppression for the uplink channel can be performed in different ways, depending on whether the UE is equipped with one or multiple transmission antennas.

In one design, an interfering ESR equipped with multiple transmit antennas can spatially control its transmission to reduce interference to the cell. The cell may estimate the uplink from the interfering ESR to the cell and may determine information for spatial nulling based on the estimated uplink, for example using any of the designs described above for the downlink. The cell may also determine the nulling gain, for example as described above for the downlink. The 5REG for the interfering CE may contain information for spatial zeroing, the gain factor for zeroing during transmission, etc. The cell can send the 5REG to the interfering OE. An interfering UE can use 5RPI to spatially direct its transmission away from the cell and/or reduce its transmission power.

In another design, the cell can perform nulling of interference during reception for the interferer

ESR equipped with a single transmitting antenna. A cell can select an UE to serve, taking into account the interfering OE.

A cell can receive received symbols which can be expressed as follows:

Ge-Pyvby-- Piv 55 -Pyv Zy!yPiv, (5) where 5u is a data symbol sent by the served CES and, 8; - a data symbol sent by the interfering ME |,

Pi is the channel vector for the uplink channel from the served SHE to cell 5,

No - the channel vector for the upstream channel from the interfering THIS | to cell 5, i«x is a vector of received symbols in cell 5,

Pv is the vector of total noise and interference in cell 5, and n: is the vector of total noise and interference, except from SHE ), in cell 5.

The cell can perform spatial processing for the receiver to recover the data symbols from the served ESR and suppress/zero the data symbols from the interfering ESR. The cell can choose the vector t of the spatial filter, which (ii) corresponds to Pi: for the served OE as close as possible, and (ii) is as orthogonal as possible to the pre for the interfering CE. In one design, the vector t of the spatial filter can be determined based on the minimum -1 root mean square error (RMS) of the receiver filter, and can be calculated as t-aNiv, where a is the scale factor and Kli is the covariance matrix of the sum of noise and interference. In another design, the cell may evaluate each entry in the spatial filter vector codebook and may select the spatial filter vector with the best signal-to-noise ratio (SNR). The cell may also determine the spatial filter vector in other ways.

The cell can perform spatial processing for the receiver as follows:

Vu - Tiv - 5u vo (6) where Zi is the detected symbol for the serviced CE m, and

Pe - noise and interference after spatial processing for the receiver in cell 5.

The processing shown in equation (b) can be performed for each subcarrier in each symbol period.

The cell can determine the gain for nulling at reception for the interfering CE as a result of the cell performing spatial processing for the receiver of the served ESR. The cell can estimate (ii) the power Ivhg of the interference from the interfering SHE with the cell performing spatial processing for the receiver, and (ii) the power Io yahg of the interference from the interfering SHE without performing the spatial processing for the receiver by the cell. The cell can determine the zeroing coefficient during reception as the ratio of Ivheye to Ipo input. The receive null gain can thus indicate the amount of interference power reduction due to the cell performing spatial processing for the receiver. The cell can provide a gain factor for nulling when receiving on an interfering ESR. The cell or the interfering ESR can calculate the target transmit power level for the OE, taking into account the receive null gain to obtain the target interference level for the cell. The interfering OE may be able to increase its transmit power by a gain factor for nulling when receiving.

The cell can determine the amplification factor for nulling during reception for a specific pair of the served CE and the interfering OE. If UE pairing is not desired, then the cell can calculate an expected (eg average) receive null gain or a worst case receive null gain based on the number of UEs that may be served and their channel states. The use of a receive null gain may be particularly applicable in femto-deployments where each femtocell can serve only one or more ESRs and can have only one or more interfering ESRs.

Therefore, a limited number of pairs of the served CE and the interfering SH may be present during the femtoconvolution.

The cell can send 5 for the interfering SHE. 5EI may contain (i) information for spatial nulling and/or a gain factor for nulling when transmitting, if the CE is equipped with multiple antennas, (ii) a gain factor for nulling when receiving, if the UE is equipped with a single antenna, and/or (ii) other information . In one project, the cell can send 5 BRIs directly to the interfering SHE. In another design, the cell can send 5Rs to the serving cell of the interfering SOE, for example, through signaling 3, which is exchanged through the transit module. The serving cell can then send 5EIs to the interfering ESR. Cell can send

ЗР at the appropriate speed. The quantization for 5EI can be chosen to obtain good spatial nulling. The same or different quantization levels may be used for 5PRI sent over the air and 5PRI sent through the transit module.

Spatial interference suppression for the downlink and uplink communication channels can be performed differently. In one design, spatial interference suppression for a given link can be triggered when warranted (instead of running all the time). For example, spatial interference suppression can be triggered when a primary source of interference is detected. In one design, 5EI can be linked at the appropriate speed to support spatial interference suppression. In another design, 5EI may be invoked when triggered by an event that may reduce the volume of service signaling. For example, ZERO may be asserted if there is a noticeable change in the spatial null information, the transmit null gain, and/or the receive null gain, eg when the change in the spatial null information or the null gain exceeds a certain threshold.

The methods of spatial interference suppression described here can be used for frequency-division duplex networks (DDU) and time-division duplex networks (DDU). For ROO, the downlink and uplink communication channels may be distributed over separate frequency channels, and the channel response for the downlink may not have a good correlation with the channel response for the uplink. For an EOO network, the UE can estimate the downlink characteristic for the interfering cell, determine the 5REI based on the downlink characteristic, and send the 5REI to the interfering cell as described above. The cell may also estimate the uplink characteristic for the interfering ESR, determine the 5REI based on the uplink characteristic, and send the 5REI to the interfering ESR, as also described above. For LLP, the downlink and the uplink can share the same frequency channel and the downlink channel characteristic can be correlated with the downlink characteristic. For a TOO network, the interfering cell can estimate the uplink characteristic for the PE based on the reference signal from the UE, estimate the downlink characteristic based on the uplink characteristic, and use the downlink characteristic to direct its transmission away from the UE. The interfering UE may also estimate the downlink characteristic for the cell based on the reference signal from the cell, estimate the uplink characteristic based on the downlink characteristic, and use the uplink characteristic to direct its transmission in the direction away from the cell. An interfering station may thus be able to receive 5AEs based on its channel estimate without having to receive 5AEs from the interfering station.

Spatial interference suppression can be supported for a given link using different signaling messages and timing schedules. Some examples of time schedules and messages for spatial interference suppression on downlink and uplink communication channels are described below.

In fig. 2 shows a design scheme 200 for transmitting data over a downlink with spatial interference suppression. For simplicity, in fig. 2 shows only two cells named and two cells 112 in fig. 1. Cell X is the serving cell for CE 1 and the interfering cell for CES 2. Cell Y is the serving cell for CES 2 and the interfering cell for CES 1.

Cell X may have data to refer to ESR 1 and may know that ESR 1 is experiencing high downlink interference. For example, cell X may receive reports of measurement results for a pilot signal from UE 1 and the reports may indicate and/or identify the strongly interfering cell U. Cell X may send a ZERO request to UE 1 to ask CES 1(s) to determine and send a ZREI to the interfering cell U and/or (ii) determine and send a feedback signal to the serving cell X. The 5REI request may contain different types of information, as described below.

Similarly, cell U may have data to refer to UE 2 and may know that UE 2 is experiencing high downlink interference. The XU cell can then send a 5RPI request to the UE 2 and request that the UE 2 identify and send the 5RPI to the interfering cell X.

CE 1 may receive a 5REI request from its serving cell X. In response to the 5REI request, UE 1 may estimate the downlink characteristic for the interfering cell Y and may determine the 5REI for cell Y based on the downlink characteristic, for example, as described above. UE 1 can then send 5EI to the interfering cell M. UE 1 can also evaluate the downlink characteristic for its serving cell X, determine the pre-coding information (eg, SOI or RMI) for cell X and send the pre-coding information to cell X. Similarly, UE 2 can receive a 5RI request from its serving cell Y, estimate the downlink characteristic for interfering cell X, determine 5EI for cell X based on the downlink characteristic, and send 5RI to cell X. UE 2 can also estimate the downlink characteristic for its of the serving cell U, determine the precoding information for the cell U and send the precoding information to the cell U.

Cell X can receive pre-coding information from UE 1 and 5EI from interfering OE 2. Cell X can determine the pre-coding matrix Px to use for data transmission based on the pre-coding information from UE 1 and 5EI from OE 2. Cell X can also determine the Raga level, x for use in data transmission based on the gain to zero when transmitting from CE 2, the target level of interference for CE 2, and/or other information. The cell X can then transmit the reference signal of the resource quality indicator (RO) using the matrix Px of pre-coding and with the level Pkves!-v5, x Power, which can be equal to

Raga, x or a scaled version of Rama, x. A reference signal or a pilot signal is a transmission that is known a priori to the transmitter and receiver. The COI reference signal may also be referred to as a power decision pilot. The COI reference signal may be a forward reference signal sent with a precoding matrix and/or may have a variable transmission power level. Cell X may also send a COI request to UE 1 and/or other UEs served by cell X. The COI request may ask UE 1 to estimate the channel quality for cell X based on the reference signal of the CO and send a CO to cell X. Similarly, cell U may determine the pre-coding matrix Ru to use for data transmission based on the pre-coding information from CE 2 and ZRI from OE 1. Cell M can also determine the level of Raga, in the transmission power, to use for data transmission based on the gain to zero when transmitting from SHE 1, the target interference level for SHE 1 and/or other information. Honeycomb

U can then transmit the reference signal KO) with the pre-coding matrix Ru and with the level Preo!-n5, in the transmission power, which can be equal to Rosa, m or a scaled version of Raaa, y. Cell X can also send a COI request to SHE 2 and/or other UEs served by cell Y.

SHE 1 can receive KO reference signals! from cells X and M, as well as a request KO! from his serving cell X. In response to the request of KO! SOE 1 can estimate the quality of the channel for the serving cell X based on the reference signals of the KO from all cells. The KOY reference signals may allow the UE 1 to more accurately estimate the channel quality that the UE 1 can expect to transmit data from the serving cell X, taking into account the pre-coding matrices and power transmission levels that the cells are expected to use. ШЕ 1 can determine КО), which can contain an estimate of 5IME for the quality of the channel, the modulation and coding scheme (МСО5), determined on the basis of the assessment

ZIMK, etc. SHE 1 can send KO! to its serving cell X. Similarly, OSHE 2 can receive KO reference signals from cells X and U, as well as a KO request from its serving cell

U. CE 2 can evaluate the quality of the channel for the serving cell U, determine the CO), and send the COI to the cell U.

Cell X can receive a COI from CE 1, schedule CE 1 for data transmission, select MO 5 based on CO, and process data for OE 1 according to the selected MC5. Cell X may generate a downlink grant (DLG), which may also be referred to as a resource assignment, scheduling grant, etc. A downlink grant may indicate assigned resources, selected

MOH, etc. Cell X can send the downlink handover and data transmission to CE 1. CE 1 can accept the downlink handover and data transmission and can decode the received transmission according to the selected MC5. CE 1 may generate acknowledgment information (ACI) that may indicate whether the data has been decoded correctly or in error. UE 1 can send ASK information to its serving cell X. Cell Х can similarly perform data transfer to SHE 2.

In fig. ZA-30O0 presents message transmission for the downlink data transmission scheme shown in fig. 2. Each cell may first select one or more CEs for possible data transmission using a set of frequency and time resources (for example, one or more resource blocks). The initial selection of CEs may be based on various factors, such as CE priorities in different cells, channel information for CEs, cell downlink buffer status, quality of service (005) requirements, network optimization criteria (e.g., bandwidth, peering), etc. e. Channel information for UEEE can be long-term and exchange between cells can be carried out through a transit module, for example, X2 interface according to I TE.

Selected SEs may be considered pre-planned SEs. Each cell can send a request

ZEI to each selected ESR, as shown in fig. BY. Each selected UE may determine and send pre-coding information (eg, SOE) to its serving cell and may also determine and send 5ERI to each interfering cell specified in the 5ERI request for that UE, as shown in FIG. ZV.

Each cell can receive pre-coding information from each selected PE, as well as ZEI from each interfering ESR. Each cell can accept or reject RRs from interfering ESRs based, for example, on utility levels, priorities, etc. Each cell can schedule one or more ESRs to transmit data on a set of frequency and time resources based on various factors, such as those described above for initial CE selection. It is planned for each cell

The ESR can be the same as or different from the originally selected ESR. A given cell may not be able to apply the appropriate precoding matrix for the selected PE, for example due to a scheduling conflict between this cell and another cell, and may then schedule another UE. For example, cell Y may first select EB 2, may be unable to use the appropriate precoding matrix for EB 2 due to a scheduling conflict with cell X, and may then schedule EB 4, which may be less disturbed by interference from cell X. This flexibility may allow cells to schedule CE, which may allow them to take advantage of the spatial beams available to the cells.

Each cell can determine a pre-coding matrix to use for the planned SNE and can also determine a transmit power level to use for data transmission. Each cell can then send a CO reference signal as well as a COI request to each scheduled UE, as shown in FIG. ZS. This cell can send KO requests and 5PRI requests to different UEs. For example, cell U can send a 5РЙ request to ШЕ 2 and can later send a КОЙ request to

IT 4. A cell can also send COI requests to multiple UEs for the same set of frequency and time resources to allow the cell to make on-the-fly scheduling decisions based on the COI! from these SHE. Each planned OE can determine and send KO! in its serving cell, as shown in fig. 30.

In the project shown in fig. 2-30, the serving cell may send a 5RY request to the CE to request the SE to send a 5RY to the interfering cell. In another design, the interfering cell can send a 5RPI request to the UE to request the UE to send 5RPI to that cell. Request 5REI can also be sent by other objects. For example, the UE can autonomously decide to send 5РЙ to a strong interfering cell.

In fig. 4 shows the design of the scheme 400 for transmitting data over an uplink with spatial interference suppression. For simplicity, in fig. 4 shows only two cells Chi m and two CE 1 and 2, shown in fig. 1. Cell X is the serving cell for CE 1 and is interfered with by CE 2 on the uplink. Cell HU is the serving cell for SHE 2 and it is interfered by CE 1 on the uplink communication channel.

UE 1 may have data to link to its serving cell X and may send a resource request. The resource request can indicate the priority of the request, the volume of data for the link from CE 1, etc. In one project, which is not shown in fig. 4, UE 1 does not send a 5BRI request to cell U, which is affected by interference. For this design, cell Y exposed to interference can send 5REIs to the ME if cell XU determines that the desired spatial interference suppression by CE 1. In another design, which is shown in FIG. 4, CE 1 may send a 5BRI request to the interfering cell U to request cell U to determine and send a 5PRI to CE 1. CE 1 may also send a reference signal together with the resource request to allow each cell to determine information for spatial zeroing or pre-encoding information for SHE 1.

The serving cell X can accept a resource request from SHE 1 and, possibly, a 5RY request from SHE 2.

Cell X can send a reference signal request to UE 1 to request UE 1 to transmit a reference signal

WHICH Cell X may also determine pre-coding information (for example, SOI or PMI) for UE 1 and may send pre-coding information to UE 1 (not shown in Fig. 4).

Cell U can receive the 5REI request from UE 1, determine the 5REI based on the uplink transmission from UE 1, and send the 5REI to UE 1. If the UE 1 is equipped with a single transmit antenna, the 5REI may contain information about the gain factor for reception nulling and/or other information for UE 1. If UE 1 is equipped with multiple transmit antennas, the UE may contain information for spatial nulling (e.g. SOI or RMI for cell U) to allow UE 1 to direct its transmission away from cell U.

UE 1 can receive a reference signal request from its serving cell X, 5RI from an interfering cell Y, and possibly pre-coding information from serving cell X. If UE 1 is equipped with a single transmit antenna, UE 1 can determine the power level when transmitting Raag, them to use it for data transmission based on the gain to zero when received from cell Y, the target level of interference for cell M and/or other information. If the UE 1 is equipped with multiple transmit antennas, the UE 1 may determine the precoding matrix Pi to use for data transmission based on the precoding information from cell X and the spatial zeroing information from cell U. The UE 1 may then transmit a reference signal.

KOI at the level of transmission Prvo!-v5, 1 and, possibly, with the matrix Pi of pre-coding. Rvo/g-v5, 1 may be equivalent to Raz, i: or a scaled version of Raaia, 1.

Serving cell X can receive reference signals of KO from UE 1 and OE 2. Cell X can determine the channel quality for UE 1 based on the reference signals of KO, and can select MC5 for UE 1 based on the channel quality. Cell X may generate an uplink grant, which may contain the selected MC5, assigned resources, transmit power level for use of assigned resources, and/or other information. Cell X can send an uplink grant to

IT 1. UE 1 can accept the uplink grant, process the data according to the selected MOH, and perform data transfer on the assigned resources. Cell X can receive the data transmission from UE 1, decode the received transmission, determine the ACS confirmation information based on the decoding result, and send the ACS information to the UE 1.

In the project shown in fig. 2, the 5PRI request can be sent in the M subframe on the downlink channel,

The RU may be sent in subframe 12 on the uplink, the CIO request and the CIO reference signal may be sent in subframe IZ on the downlink, the CIO may be sent in subframe 14 on the uplink, the downlink grant and data may be sent in subframe 5 on downlink and ASK information can be sent in subframe 16 on the uplink. Subframes 11, 12, 13, 14, 15, and 16 may be divided into the same or different number of subframes, for example, two to four subframes between consecutive subframes used for transmission. In one project, sub-frames of MN, IZ and

Y5 in the downlink may belong to one downlink queue, which may contain downlink subframes divided into Y subframes, where Y may be any acceptable value. Subframes 12, 14, and 16 may belong to a single uplink queue, which may contain uplink subframes spread across GIs. subframes

In the project shown in fig. 4, the resource request and the ZEI request can be sent in subframe Y on the uplink channel, 5REI and the reference signal request can be sent in subframe 2 on the downlink channel, the reference signal KO! can be sent in subframe Y3 on the uplink channel, the uplink grant can be sent in subframe 14 on the downlink channel, data can be sent in subframe 15 on the uplink channel and the ASK information can be sent in subframe ib on the downlink channel. Subframes M, 12, 13, 14, 15 and 16 can be divided into the same or different number of subframes. In one design, subframes M, 1Z, and 15 in the uplink may belong to the same queue in the uplink, and subframes 12, 14, and 16 in the downlink may belong to the same queue in the downlink.

In the same project, resources for message and data transfer can be implicitly transferred.

For example, in fig. 2 a 5RI request may request specific data resources for a 5REI, a COI request may request a specific data resource for a CO) etc. In another design, resources used to link messages, resources used to link reference signals, and resources that are used to refer to transmission data, may be implicitly transmitted. For example, in fig. 2, a C5RI request may be sent over Kevn-yaeo downlink resources and may request for 5RI Kodt resources for downlink data that may be associated with Keki-veo. The reference signals of all cells corresponding to the same data resources can overlap with Codd, so that UEs can measure the total interference observed by these ESRs from all cells. The ZEI may be referenced via uplink K5RI resources, which may be associated with the downlink Kevi-veOo resources used to reference the 5RI request, or may be explicitly specified in the 5RI request. A COI request may be sent over Knvo!-veo downlink resources and may request COI for Kvo!-jaz downlink resources that may be associated with Kvo-nkeo. The COI may be determined based on the COI reference signal sent via the downlink Qo-I5 resources and may be sent via the uplink QoI resources (CO), which may be associated with the downlink Qo-Yeo or may be explicitly specified in the request WHICH A reference signal of KOI can be sent through resources

The downlink input and the pre-coding matrix and the transmission power level to be used on the downlink data transmission code resources can be transmitted.

Spatial jamming messages and transmissions can contain different types of information. For example, messages and transmissions for spatial downlink interference suppression may contain the information described below.

In one project, a 5REI request sent to the SHE may contain one or more of the following:

Each interfering cell, to which the OE must send 5РЙ,

Frequency and time resources to determine 5BRI,

Uplink resources for use when referring to 5BRI,

Request priority 5RNY,

Target interference level, and/or

Other information.

Interfering cells can be identified based on the pilot signal measurement reports sent by the CE to the serving cell. In one design, each interfering cell may be identified by a short cell identifier (CI), eg 2-3 bits for each interfering cell, to reduce the volume of service signaling. Another design may use a bit matrix for a set of interfering cells to be reported via the OE, and each interfering cell may be associated with a bit in the bit matrix. The number of interfering cells can be limited (for example, six cells) to reduce the volume of service signaling. The number of interfering cells may also be limited to cells with a received power within a given value (for example, within 10 dB) of the receiving power of the serving cell. The UE can send 5РІ to each interfering cell specified in the 5РІ request.

Frequency and time resources, by which 5РЙ should be determined, can be all or part of the bandwidth of the system, for example, a subband, one or more resource blocks, etc.

Resources can be explicitly specified in a 5RE request (for example, by means of a resource index) or be passed implicitly (for example, associated with resources to which a 5RE request refers).

The priority of a 5EI request can be determined based on various factors. In one project, the priority can be determined based on the medium-long-term service function. The priority may also contain a short-term priority differential. The priority can be quantized by several values (for example, 1-2 bits) to reduce the volume of service signaling. In one project, the priority can be determined by the type of data to be sent, for example, best effort (BE), guaranteed dispatch (AK), urgent dispatch (ER), etc.

In a single project, the 5RPI for an interfering cell may contain one or more of the following:

Information for spatial zeroing, for example, SO or RMI for the interfering cell, SOI or RMI for the serving cell, etc.,

The gain factor for nulling when transmitting and/or the gain factor for nulling when receiving,

Frequency and time resources to suppress the interference created by the interfering cell,

The target level of obstacles for SHE,

The priority of the request to suppress the interference created by the interfering cell,

Type of feedback information, and/or

Other information.

The SOI or RMI for the interfering cell and the SOI or RMI for the serving cell can be determined as described above. The SOI/RMI for each cell can be provided with sufficient resolution (eg 8-10 bits) to achieve the desired zeroing characteristics during transmission. The serving cell can request the ESO to send SOI/RMI for the interfering cell and

SOI/RMI for the serving cell at the same time to allow accurate scheduling coordination between different cells. The gain factor for nulling during transmission and/or reception may also be determined and reported as described above.

Frequency and time resources that can be explicitly indicated by means of a 5BEI (for example, a resource index) or implicitly transmitted (for example, associated with resources to which the BERs refer) in order to reduce interference. Frequency and time resources may span a single subband in a single subframe, multiple subbands in a single subframe, a subband for multiple subframes, or some other time-frequency dimension. The priority for 5EI can be equal to the priority in the 5EI request. In wideband deployments (eg, bandwidths greater than 5 MHz), a separate 5RPI may be sent for each portion (eg, 5 MHz) of the bandwidth to reduce the feedback payload.

The type of feedback information may indicate whether the ZEI () contains the EOI corresponding to the channel between the interfering cell and the UE and (ii) the RMI that can be used by the serving cell to

SOE One or both types of information may be useful for making a scheduling decision in the interfering cell.

In the same project, the KO request sent to the SHE may contain one or more of the following:

Frequency and time resources to determine KO),

The uplink resources to be used for the KO link,

Priority of the KO request), and/or

Other information.

In one design, the reference signal KOI may be transmitted by the cell in the assigned resources in subframe Y3 and may convey the precoding matrix and transmission power level likely to be used on the corresponding resources in subframe 15-13-4A, where A may be a fixed offset . The level of transmission power in the corresponding resources can be the same or different from the level of transmission power transmitted in the reference signal of KOI, for example, depending on 0o5, channel quality conditions, etc. In one project, all cells can transmit their reference signals of KOI on the same resources and may use different scrambling for a particular cell. This may allow the ESR to measure the desired signal component from the serving cell and interference from interfering cells based on different scrambling codes for those cells. The reference signals of KOY can allow accurate measurement of channel states for a specific resource with a relatively small volume of service signaling. The volume of service signaling may depend on the desired modularity of resources.

In one project, the transmission of the COI from the UE to the serving cell may contain the channel quality of the frequency and time resources explicitly or implicitly specified in the COI request. A CUE may contain a quantized channel quality (eg, four or more bits) for each at least one layer to be used to transmit data to the UE. Each level may correspond to a spatial channel in the MIMO channel from the serving cell to the SHE. The COI may also contain the quantized channel quality for the base layer and the differential value for each additional layer. A COI may also contain a rank indicator (RI) (eg, one or two bits) to indicate the number of levels that should be used for data transmission.

Messages and transmissions for spatial interference suppression on the uplink communication channel may contain (i) information similar to the information described above for spatial interference suppression on the downlink channel and/or (ii) other information.

In one project, SHE can send 5 РІ and/or KO! on a control segment that can be released from other transmissions. For example, cell X may reserve a control segment for the SHE in cell M and possibly other cells to send 5PRI and/or KO! to the X cell. OE can send ZRYI or KO) to the cell using BOMA or MkhZS-EOMA.

In one design, messages and transmissions for spatial suppression of interference can be selected additionally to reduce the volume of service signaling. For example, the sequence of messages and transmissions shown in fig. 2, may be invoked once in each scheduling interval and scheduling decisions (eg, selected precoding matrices and transmission power levels) may be valid for the entire scheduling interval. The planning interval can span

M subframes in one alternation or some other suitable duration. Each alternation can contain subframes divided into G. subframes. The scheduling intervals for different queues can be staggered in time to avoid the long initial delay caused by extra sampling. In another design for persistent scheduling, a message may contain a duration bit to indicate that it is valid for a long period of time.

The messages and transmissions shown in fig. 2 and 4, can refer through different channels. For example, in IGTE systems, a cell can send 5RYI and COI requests over the downlink physical control channel (ROSCN) to CE. In one design, a cell may send a 5PRI request or a COI request using an existing downlink control information (DCI) format, for example, with different scrambling for cyclic redundancy check (CRC) to distinguish a 5PRI or a COI request from other types of messages. In another design, a cell can send a 5RPI request or a POI request using the new OSI format. The cell can send numerous 5BRI or KO requests! together in space,

corresponding to one ROSSN, using different SCS. The cell can also transfer the provision of the downlink channel via ROSSN to the planned UE. A cell can transmit data over a physical downlink (PDL), which is shared in one or more NAC transmissions.

The cell can also transmit the assigned reference signals on the ROBSN to the planned OEs.

THIS can send 5BRI, CO and/or ACS information over (its) physical uplink control channel (PCHC), if only control information is sent, or (its) shared physical uplink channel (PCHC), if both data and information are sent management. P and COI can thus be sent in-band if data is also sent. ROSSN can carry up to 12 bits of information on two resource blocks (RBs) in one subframe. These 12 bits of information can be coded with a (20, 12) block code to produce 20 code bits that can be further processed and sent over two KVs. In one design, an increased payload of C bits (for example, 13-16 bits) for ZEI can be sent over ROSSN with a higher code frequency, for example, with a (20, 0) code frequency, where the OO can be greater than 12. In another the project increased payload can be sent using the new ROSSN format. The payload can be encoded with a convolutional code or a Reed-Muller code and sent over two half-wavelengths. Each half-wave can cover six subcarriers in one time slot of six or seven symbol periods and can contain a reference signal in the central two-symbol period of the time slot. In yet another design, the enhanced payload can be split into multiple parts and each part can be sent using the existing ROSSN format. Multiple parts can be sent on different sets of subcarriers in the same subframe using Mx5C-EOMA or in different subframes to allow the use of higher transmission power for each part. Various messages and transmissions shown in fig. 2 and 4, can also be sent over other data and/or control channels.

The interference suppression methods described here can increase the dimensionality on the downlink as well as on the uplink. The methods can provide a significant gain in unplanned deployment (for example, to extend coverage), limited communication scenarios, and other scenarios. The techniques may be particularly advantageous in scenarios with multiple served EBs, experiencing high interference from multiple neighboring cells (eg, femtorolling) and in scenarios with pulsating traffic.

The methods described here can also be used for Intersite Packet Sharing (ISP) and Shared Silence (C5). For IZR5, multiple cells (of the same or different eMV nodes) can send a packet to a single UE. Each cell can send its data transmission to the UE based on the precoding information defined by the UE for that cell. For IZR5, each cell, except the serving cell, can control its transmission in the direction of the UE (instead of the direction from the UE) based on the precoding information from the UE. For C5, the interfering cell may reduce its transmit power (perhaps to zero) to reduce interference to the UE in the neighboring cell. The interfering cell can decide whether to direct the transmission away from the SE or simply reduce the transmission power.

In fig. 5 shows a draft process 500 of the sequence of operations during data transmission with spatial suppression of interference in a wireless communication network. The process 500 may be performed by the first station, which may be a downlink cell, an uplink UE, or some other entity.

The first station (for example, a cell) can receive 5! from a second station (eg, subject to ESR interference) that is not in communication with the first station (block 512). The second station may send a 5RPI to the first station in response to a 5RPI request, which may be sent to the second station by the serving cell of the second station or the first station. The first station may also send a request

The PR of a third station (for example, a served ESR), which can determine and send 5PRI to one or more other interfering stations. 5RY may thus be sent upon inquiry or upon request.

The first station may receive pre-coding information (eg, SOI or RMI) from the third station (block 514). The first station may direct the third station's data transmission based on the precoding information and the 5RI to reduce interference for the second station (block 516).

In one project, 5РІ can contain information for spatial zeroing (for example, SOI or

RMI) for the first station. The first station may then send a data transmission based on the spatial null information to direct the data transmission away from the second station. For example, the first station can select a precoding matrix based on the 5RPI from the second station and the precoding information from the third station. The first station can then forward the data transmission based on the precoding matrix to the third station.

In another design, the 5ERI may contain spatial nulling information and a transmit nulling gain that shows the suppression of interference at the second station due to the use of spatial nulling information by the first station. The first station can determine the transmission power level based on the gain to zero when transmitting and can send a data transmission with a certain transmission power level. In yet another design, the 5EI may include a receive nulling gain indicating the suppression of interference at the second station due to the use of spatial processing for the receiver by the second station. The first station can determine the transmission power level based on the gain to zero when receiving and can send a data transmission with a certain transmission power level.

For downlink data transmission, the first station may contain a serving cell, the second station may contain a CE that is subject to interference, and a third station may contain a served UE. The serving cell can receive 5PRI directly from the UE exposed to interference. Alternatively, the serving cell can receive 5RPI indirectly from

OE exposed to interference through another cell. For uplink data transmission, the first station may contain an ESR, the second station may contain a cell exposed to interference, and a third station may contain a serving cell for the ESR.

In fig. 6 shows a design of a device 600 for transmitting data with spatial interference suppression. The device 600 includes a module 612 for receiving at the first station a ZERO sent by a second station that is not in communication with the first station, a module 614 for receiving pre-coding information from a third station, and a module 616 for linking data transmission from the first station to the third station on based on the pre-coding information and 5RPI to reduce the interference for the second station.

In fig. 7 shows a process design 700 for receiving data with spatial interference suppression in a wireless communication network. Process 700 may be performed by the first station, which may be a downlink UE, an uplink cell, or some other entity.

The first station (for example, the SHE) may accept a 5EI request to send a 5RI for a second station (eg, an interfering cell) that does not have a connection with the first station (block 712). In one project, a ZEI request can be sent by a third station (for example, a serving cell), which has a connection with the first station. In another project, the ZEI request can be sent by the second station. In any case, in response to the 5EI request, the first station may determine the 5EI for the second station (block 714). The first station may send the 5EI to the second station or to a third station, which may send the EI to the second station (block 716). The first station may also determine the precoding information (eg, SOI or RMI) for the third station (block 718) and may send the precoding information to the third station (block 720). The first station may then accept the data transmission sent by the third station based on the pre-coding information (block 722). The first station may also receive a transmission sent by the second station to another station based on the 5RPI to reduce interference to the first station (block 724).

In one project, the ZEI may contain information for spatial zeroing. The first station can determine the characteristic of the channel from the second station to the first station. The first station may then select a precoding matrix from the codebook of precoding matrices based on the channel characteristics to reduce interference to the first station. The spatial zeroing information may contain the selected precoding matrix, SOI or PMI for the second station, SOI or PMI for the third station, etc. In any case, the second station may send its transmission based on the spatial zeroing information to direct the transmission away from the first station.

In another design, the ZE may contain information for spatial zeroing and gain coefficient for transmission zeroing. The second station can then send its transmission with a transmission power level determined based on the gain to zero when transmitting. In another design, the ZEI may contain a gain factor for nulling during reception. The second station can then send its transmission with a transmit power level determined based on the gain to null on reception.

For downlink data transmission, the first station may contain an OE, the second station may contain an interfering cell, and the third station may contain a serving cell for the UE. SHE can send 5EI directly to the interfering cell. Alternatively, the UE can send 5RE to the serving cell, which can send 5RE to the interfering cell. For uplink data transmission on the communication channel, the first station may contain a cell, the second station may contain an interfering CE and the third station may contain an OE served by the cell.

In fig. 8 shows a design of a device 800 for receiving data with spatial interference suppression. The device 800 includes a module 812 for receiving at the first station a request for a C5EI to send

RR to a second station not connected to the first station, module 814 to determine the 5RPI for the second station, module 816 to refer the 5RPI, for example, to the second station, module 818 to determine the precoding information for the third station, module 820 to link pre-coding information of the third station, module 822 for receiving a data transmission sent by the third station to the first station based on the pre-coding information, and module 824 for receiving a transmission sent by the second station of the other station based on 5RI to reduce interference to the first station.

Modules shown in fig. b and 8, may contain processors, electronic devices, hardware devices, electronic components, logic circuits, memory devices, system programs, firmware control programs, etc., or any combination thereof.

In fig. 9 shows a block diagram of a design of a base station/eMMV 110 and CE 120, which may be the base station/eMMV or CE shown in Fig. 1. The base station 110 may be equipped with transmitting antennas T 934a-9341, and the OSHE 120 may be equipped with receiving antennas are 952a-952g, where, of course, T2 1 and KK 1.

At base station 110, transmission processor 920 may receive data from data source 912 and messages from controller/processor 940. For example, controller/processor 940 may provide messages for spatial interference suppression shown in FIG. 2 and 4. The transmission processor 920 can process (eg, encode, interleave and display symbols), data and messages and provide data symbols and control symbols, respectively. The transmission processor 920 may also generate reference references for the reference signal KO) and/or other reference signals or pilot signals. The transmission multiple-input-multiple-output (MIMO) processor 930 may perform spatial processing (eg, pre-encoding) of data symbols, control symbols, and/or reference symbols, as needed, and may provide streams of output T transmission symbols to transmission modulators T (MY) 932a-9321. Each modulator 932 can process a corresponding output stream of symbols (eg, for OROM, etc.) to obtain an output stream of samples. Each modulator 932 may further process (eg, convert to analog form, amplify, filter, and up-convert) the output sample stream to provide a downlink signal. Downlink T signals from modulators 932a-9321 can be transmitted, respectively, through T 934a-934i transmission antennas.

At SHE 120, antennas 952a-952g can receive downlink signals from base station 110 and can provide the received signals to demodulators (EMOs) 954a-954g, respectively. Each demodulator 954 may shape (eg, filter, amplify, down-convert, and digitize) a corresponding received signal to obtain input samples. Each demodulator 954 may further process the input samples (eg, for OBM, etc.) to obtain the received symbols. The MIMO detector 956 can receive the received symbols from all demodulators K 954a-954g, perform MIMO detection for the received symbols, if possible, and provide the detected symbols. The receiving processor 958 may process (eg, demodulate, deinterleave, and decode) the detected symbols, provide the decoded data for the SHE 120 to the data receiver 960 , and provide the decoded message to the controller/processors 980 .

On the uplink in the OE 120, the transmission processor 964 may receive and process data coming from the data source 962 and messages (eg, for spatial interference suppression) from the controller/processor 980. The transmission processor 964 may also generate reference symbols for the reference KO signal) and/or other reference signals or pilot signals. The symbols from the transmission processor 964 can be pre-coded by the TX MIMO processor 966, if necessary, additionally processed by modulators 954a-954g and transmitted to the base station 110. At the base station 110, the uplink signals from the SHE 120 can be received by antennas 934, processed by demodulators 932, detected by MIMO detector 936, if necessary, and further processed by receive processor 938 to obtain decoded data and messages transmitted from OE 120.

The controllers/processor 940 and 980 may control the operation of the base station 110 and UE 120, respectively. The processor 940 and/or other processors and modules in the base station 110 may perform or control the process 500 shown in FIG. 5, the process 700 shown in FIG. 7, and/or other processes for the methods described here. Processor 980 and/or other processors and modules on CE 120 may execute or control process 500 , process 700 , and/or other processes for the methods described herein. Memory devices 942 and 982 can store data and control programs for the base station 110 and OE 120, respectively. The scheduler 944 may schedule UEs for downlink and/or uplink data transmission and may provide resources for scheduled

ABOUT.

Those skilled in the art should understand that information and signals can be presented using any of a number of different technologies and methods. For example, the data, instructions, commands, information, signals, bits, symbols, and elementary signals that may be mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any what combination of them.

Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits and steps have been described above, generally, in terms of their functionality. Whether such functionality is implemented as hardware or as software depends on the specific application and design constraints imposed on the entire system. Those skilled in the art may implement the described functionality in various ways for each particular application, but such implementation decisions should not be construed as deviating from the scope of this disclosure.

Various illustrative logic blocks, modules, and circuits described in connection with the disclosure made herein may be implemented or implemented using a general-purpose processor, digital signal processor (DSP), specialized integrated circuit (ASIC), user programmable gate array (PSA). or other programmable logic device, discrete diode or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, as a combination of a CPU and a microprocessor, a plurality of microprocessors, one or more microprocessors with a CPU core, or any other such configuration.

The steps of the method or algorithm described in connection with the disclosure herein may be implemented directly in hardware, in a software module executed by a processor, or in a combination thereof. A program module can be permanently located in random access memory (RAM), flash memory, non-volatile memory (ROM), erasable programmable non-volatile memory (EPROM), electrically programmable erasable non-volatile memory ( EERCOM), registers, hard disk, removable disk, CO-COM or any other form of data carrier known in the art.

For example, the data carrier is connected to the processor in such a way that the processor can read information and write information on the data carrier. Alternatively, the data carrier may be an integral part of the processor. The processor and the data carrier can be permanently located in the ABIS. ABIS can be permanently located on the user terminal. Alternatively, the processor and the data carrier may be permanently present as discrete components on the user terminal.

In one or more example designs, the functions described may be implemented in hardware, software, embedded software, or any combination thereof. When implemented in software, functions may be stored or transmitted as one or more commands or control programs on a computer-readable medium. Computer-readable media include both computer storage devices and data transmission media, including any transmission medium that facilitates the transfer of a computer program from one location to another. Data carriers can be any available media that can be accessed by a universal or special computer. By way of example only, but not by way of limitation, such computer-readable media may include KAM,

VOM, EERVOM, SO-COM or other optical disk drive, magnetic storage device or any other data transfer medium that can be used to carry or store desired program controls in the form of commands or data structures and that can be accessed universal or specialized computer or universal or specialized processor. In addition, any connection is properly called a computer-readable media. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (051), or wireless technologies such as infrared radiation, radio waves, and microwave waves, then coaxial cable, fiber optic cable, twisted pair, O5I. or wireless technologies such as infrared radiation, radio waves and

Microwaves are considered to be within the definition of a data transmission medium. A disc, as the definition is used here, includes a compact disc (CD), laser disc, optical disc, digital universal disc (DVD), floppy disk, and DVD disc, where some discs (discs) typically reproduce data magnetically and others disks (discs) reproduce data optically with the help of lasers. Combinations of the above must also be contained in a volume of computer-readable media.

The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure should be readily apparent to those skilled in the art, and the underlying principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but rather should be presented in the broadest scope consistent with the principles and novel features disclosed herein.

tg-t-zhu PJMA VYH polynfn SKIN old det g t

DNA ID,

THEN. r. te and tyar Ya X hop Y ka and phrya; x - x

Мих и Х Ох их и B: МХ Х GeTeU х o rukh a Menu sm х ho t N z НИ V y sho Х y " pa pidmprihlai macropttmnnya ХК Х х ы во Х х яцё и х Х рко x g and goes pom

AS odrnitt ti ttnnii ni teti tih U

N

B

. and their M and Her nu r pin no

Av y NA pmypezheny m-kh DON EV ek hom Z letu A She! sh- tav AY . with

HE IS IN bkznekiyo pi same voli buapintsenik UZ

And sleep Her with from A aunt pak

He betrayed me and died

TITA, last Tuesday of the month of July, МКГ дмний и Yes: "В Я | maybe BOOM | N N nin shi v p p k p t ho Ya x Ya m

Oohhemoh x KI Ech

Topyiyuuainnykh In 7 sh is Ne Yan Yad tt, N y u N piva Miya wa ; | Y SHOE sezhezhizheyuichitt iti Mitini nn VeKe oo No i no i eV i it

Fo

University of Technology

N N Fen Ya

KIN OU. necessary V

All TM Ж pudkaogya Eya x Z veke others x y x 1 ohizhkAzhio 1 rya E U peron ;YCHNINNN None we: y 1 І Y Kim roya BOVMO KO tentu nttnktttn nya day tt in tt nut tt tt tov YAM jin ZK 7 ke su move

Phi,

ko Kay jack d doty y; with x sk x their T and V X

IZ - EE And some EB X, in sbezhh Х com M 2 V mines. HOM i hori y t h dk AH x z x x II i poh EE cEZ M she Z X chEZ x x s x i kl x hu shop i Ko u shir eh

WITH WITH WHAT and;

I and Be Still more d) Shvya o. kata ii U algo U tii kh i nenko: pchg. OV on NEW Tue

Ku y cy" shk ih NYA y

With her- V zam Kk Because of that I sing them

EE kov vgu V ah M,

From magnificent M to already from the captivity of MAO hundred Va

KNIFE x pr Not I V still a x and schi V

PE «zhi y 53 My x Kaya 3 M S EH U Y Ya tsy

From May 2. MU g 7 and " in GKU I" and pe I pr 1 pek I. Tsi GO: lumrtik linu

It is Fig Zo in the same "and for which wine I am." sweat Ziliit shenation tive ' | mules, pofmeniukki

Flippennk H pi rol her

Pe KD i PES KK M: Ki x 7 x I -th year I ; - r Y x V. I idnnnnnnnnnyi

Every one. I ; and y kg nanny y tt Codes

PzVYS KE NNI N i

N y Hektonka and N pony nm en in pon pony inn x - x

Moon her eats and h

N N

Nkizhenk rent pehviyhi

Boosminyu and optitita as, I VO rec en ev BUT NOT A BATHS THEY ON oo nn UNN schi

Sya dika moh I LKK gray "eh ke x 7 U u

Gl x 7 m and pIchureU! x scha fields

Ii fipizenii and my zhanntzenny Dachi

Yechurich VI sikekoh Fr

And young KI! kA pkt royu nya pk

IZHVaV, ve di TLA g u tai h PU

Fk.

Ai

B

Marriage in Znemsk: Her

Minin inn p poriv riy i Bur; to

J "about EX

It is aschnoy oil sown siaiesknyg Her N But vase poilyuoMmu ma pepper ZE kiz ka VE, having children with pmuga appeared and re opsorerukontchiviyk; oyu and has zhavu szhkurmahah PE opa limlaatumh kvaneh And from pershekyuinotseh s. - i lurlhaiiy shen de ZK KLih t porem. With dych ok uncle N kak

Her dream is swollen eyelash

I Ya yi iya g pt kZIYA N Mozume Ah pridomuU papprmanyai ; N: and her

Pryynyatilirprakkatslyutovaraiitso i -in poceredevoh kalunaitsya yamotrety sizitsy lih A shchi N i spaumdniz corners giv fnvprikhonlovii | N and V po and Vidrtyutnttntitnnntnnnnnnntnnnnnnniatya and glass fabric SH and d: and no p ZP KIV with cheeks: : .

M YA NN V OMoluldopyaznkitsaneh pope one VID iMeppluk pyridavu peznh From peroxide kak! N : obpertsym iden oi sr sgantske not mov; and trv) sty nye on boopv nNFormation and BO borshatsy pobeobdneotsptihododuynuy ZK about rlaporeznusny kiluanyai VER, plo meti I ronashamevciykhti peurkikodu for pkukot joints

N pertshkodu doh pride N NiSh! Not

N N WE

Н Н КОД миднжнннжяннюјюєєєєєєєєєєєєєєє and and the influence of ttkttozh yati eeah, and .

N Mzneik x cha A eplnzhinvlzhzhnzhchvzhzhzhkhjettyzhiazant tt kn zhavzhvtyngzhentvzhichnanizhi chn, Ffi,y zlk ky no

Ba

Y Zatsmok in the cheeks x ; chm st 2 Gena

Zh U and M 1

Neyykti bending of the stmyoi snapriiaiya, M and kUeminah priimimu ma pere izn cy dama VS; I will sell VYS by the whisker state of fozdiat M, shufposnaty Kr dk lu

Y i N Ii ak. love 1

Siatsriyachats; kzakazhekey kitsek), kyu mk 3 m steMnIE shi ni mls su haKu z merpok ! I will run away from Leocemoi am! N pyzytsee u

N : N which is heavy

And yes; a sheeezheetntyayayattyyantya tya Tonya tyayuyayatyanntyannnnnyah pOK i te Tsi s. ore - H 5 «Y KO Malu lo Khizizesych VO for a rod. p i - 7 N and Mykh ZK zdya fierce puditsia, and stamshchai and! E I ; en a a KI kto kto TVO TTTI IIT tri iii toni, in cha pay

U i FI : Mini i I ROK

Each woman, who is sitting in a TOR Kpudeya rmomoeivatsiyaya, zanponklatka and " ATIVAVY N VO and in I; DRUGU INNTIU:

N and NO, etc

N N N i 5 715 ZI

Kk Ka pn In MMK | Colin ennin tt nn szhtttnktentnnttnontnttezhnnnn nn

N Byzhannan kformomikh poperelyudto I. N MolUulYachya Acknowledgment of the pyrormation of ongoing evils in the case of conflicts, for the reseiyuremtor of the bottom in stahoyi and pshyueteryutth diapers and N i i hu: pla u ki N pok potna N Po Ue ny rte NN

Kpyuslyato Mfopmaniku. If KoduVamiya N Mrohude had passive fodder. for lryh pcentskh them, despite their appearance, the oil is sticky. I am 725! i kfoya N y

To accept the following dinephselana trshniaia N MilUl dai to accept lerelvchilans, uppshcheih on the first utlkiio not review: N field tritnokrkteniuyu nyu port NO pnfopmation rea niso kiluVaekh v-ratanih peyutoem pyfiomisi tsoperedonio

AND

' CIRCULATION

N N

En v nen and vin i ON yah and children in RUK! Ku prmiyeshtm opoodema ryvnu. the second skitsk and Mene pakh pmeismu Before we were buried on the body of the MKK pyhezmentiti peribion we! Mousoy stdnpisc vkshe k ZK and pet stani B - to reduce the first person on the erpy stave

AND

Miidondnnninndlittn ki parnnn nanny nanny N /4 7 ve

N Klen N k. u o pi tu M

Fig Chi. I and again SYA Not o pyati in g -v zh Sy ese KITY p i vKya still I'm waiting for food "55 sh-ray oi Ki and voya B NO

TE She gde Po lov and i Tsya VO GNrhvimm foimersani r opzhekor. ro MLAOENYK or ho zzhrzhikniu 4 directed by nyam rcy | re iozanyh ozh onomkhym is I: chhmil tu fany Kf rn i Y dklzheetmmo: zimoemeh vk zem

Y 7 th IX and H | ND: NU I Ketuttnkyuvk h ofrlyuzhokvy M g Ne p A VYN ron KO Konya and Penn; chani pd bnnnchnnnia х І і і NO No ; ! detechinkndnnn N d CHE Bdnnnniannannnnia N their rsht N their Ii people! pu what ii ZSh r Still what what m. her. What are the 14 palektktya nt fryers and their I NV Shopennylot r GUeh pink rofo nenyuyu ribyMkutia | I: x STILL MN iulauyunth rychukin rudi proymnihkh ki i NN and i These mrmkhtsi in pd ryh: 1 5 NN. in h SCHE r i NN and I BO KUN day nya u. KO Pou loyu ek | I

I Seninechchtyutyuya gi B a Not frennnnnnnnnnnyai N what NIK umy Z Kachnia ee chn that for Bo wl ROM she rrozh RUT to 1 ?

POD I ME UZH N NESSHSHMZHh Kui; rn of the swarm

There's the Throne : N Y YOU Prasnym! Myzhetyuvo 1 Puree prmimeb: horn. | 3 M douyachyumi pek ENN tk royu

НН ОО их рей я NEW PYAK o ky ONY ANU

Tomykh Mf OTYneMU Ve unijayumoi Z en piteniayakA V, khi u es I i : rofkmenk Pik Meduya u ! WE and m MON I Mlnnnninnnnn? BC dnnnytsy Kishzhnnnnny! Minnie child ut

F.