TW201724775A - Beam discovery reporting for spatial multiplexing - Google Patents

Abstract

User Equipment (UE) and base station (eNB) apparatus and methodology for single-user multiple-input/multiple-output (SU-MIMO) operation. UE receives a plurality of discovery signals carried via corresponding directional beams having various angular directions. The UE determines received signal power measurements and directionality information of the corresponding directional beams, and determines a set of candidate beam directions according to selection criteria that apply preferential weighting to beams based on the signal power measurements and on angular separation of beam direction ascertained from the directionality information. The UE transmits reporting messaging that identifies the set of candidate beam directions to the eNB.

Description

Beam exploration reporting technology for spatial multiplexing

FIELD OF THE INVENTION Embodiments relate to wireless communications. Some embodiments relate to a wireless network including a 3GPP (3rd Generation Partnership Project) network, a 3GPP LTE (Long Term Evolution) network, a 3GPP LTE-A (Advanced LTE) network, and a 5G network, but implemented The scope of the examples is not limited in this respect. Some embodiments are directed to beam exploration operations in a network that utilize spatial multiplexing such as multiple input multiple output (MIMO) techniques.

BACKGROUND OF THE INVENTION In wireless communication systems, spatial multiplexing typically involves the use of beamforming to transmit signals such that the signals propagate in a variety of selected directions. At the receiving end, angular selectivity can be used in a similar manner to receive signals from one or more selected directions while suppressing signals from other directions. Advantageously, where the receiver is located in an environment where there is a signal reflective object, structure or topographical feature near the receiver, directional transmission and directional reception can be used in a coordinated manner to find directly or as one or more other directions The reflection reaches the direction of the transmit beam of the receiver. The receiver can distinguish information arriving from each of the various directions under favorable conditions. Thus, different transmit beam directions may be used to carry different information to the receiver, thereby increasing the total communication bandwidth between the transmitter and the receiver. This type of spatial multiplexing is sometimes referred to as single-user multiple input/multiple output (SU-MIMO) operation.

SU-MIMO relies on the ability of the receiver to report performance information about the quality of the communications arriving in various directions to the transmitter. However, this report occupies communication overhead that could otherwise be used to carry application content. Therefore, an effective report of beam exploration is required in SU-MIMO operation.

In accordance with an embodiment of the present invention, a device for a User Equipment (UE) having single-user multiple input/multiple output (SU-MIMO) operability is provided, the device comprising a transceiver circuit and a processing circuit, the processing circuit configured to: control the transceiver circuit to receive, from an evolved Node B (eNB), a plurality of discovery signals carried via corresponding directional beams having various angular directions; determining the search signals Received signal power measurements and directional information of the corresponding directional beams; determining a set of candidate beam directions from the directional beams according to a selection criterion, the selection criteria being based on the signal power measurements and based on the The angular spacing of the beam directions determined by the directional information is prioritized for use in the beam; and the transceiver circuitry is controlled to transmit a report message to the eNB, the report message identifying a set of candidate beam directions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The following description and the drawings are intended to be illustrative of the specific embodiments. Other embodiments may incorporate structural changes, logic changes, electrical changes, and other changes. Portions and features of some embodiments may be included in, or substituted for, those of other embodiments. The embodiments set forth in the scope of the claims are intended to cover all such equivalents.

1 is a functional diagram of a 3GPP network in accordance with some embodiments. The network includes a Radio Access Network (RAN) (e.g., as depicted, E-UTRAN or Evolved Unified Terrestrial Radio Access Network) 101 and core network 120 (e.g., shown as Evolved Packet Core (EPC)) The radio access network and the core network 120 are coupled together via an S1 interface 115. For convenience and brevity, the core network and only a portion of the RAN 101 are shown.

The core network 120 includes a Mobility Management Entity (MME) 122, a Service Gateway (Serving GW) 124, and a Packet Data Network Gateway (PDN GW) 126. The RAN 101 includes an evolved Node B (eNB) 104 for communicating with User Equipment (UE) 102 (the evolved Node Bs can operate as a base station). The eNB 104 may include a macro eNB and a low power (LP) eNB. According to some embodiments, the eNB 104 may transmit a downlink control message to the UE 102 to indicate the allocation of Physical Uplink Control Channel (PUCCH) channel resources. The UE 102 can receive downlink control messages from the eNB 104 and can transmit uplink control messages to the eNB 104 in at least a portion of the PUCCH channel resources. These embodiments are described in more detail below.

The functionality of the MME 122 is similar to the control plane of the legacy Serving GPRS Support Node (SGSN). The MME 122 manages the mobility aspects of the access, such as gateway selection and tracking area list management. The Serving GW 124 terminates the interface towards the RAN 101 and routes the data packets between the RAN 101 and the core network 120. In addition, the Serving GW may be a local mobility anchor for inter-eNB handover, and may also provide an anchor for inter-GPP mobility. Other responsibilities may include legal interception, billing, and some policy enforcement. Serving GW 124 and MME 122 may be implemented in a physical node or in a separate physical node. The PDN GW 126 terminates the SGi interface towards the Packet Data Network (PDN). The PDN GW 126 routes data packets between the EPC 120 and the external PDN and can be a key node for policy enforcement and billing data collection. The PDN GW can also provide an anchor for mobility using non-LTE access. The external PDN can be any kind of IP network as well as an IP Multimedia Subsystem (IMS) domain. PDN GW 126 and Serving GW 124 may be implemented in an entity node or in a separate entity node.

The eNB 104 (macro or micro) terminates the air interface protocol and may be the first point of contact for the UE 102. In some embodiments, eNB 104 may implement various logical functions of RAN 101, including but not limited to RNC (Radio Network Controller Function), such as radio bearer management, uplink and downlink dynamic radio resource management and data Packet scheduling, as well as mobility management. In accordance with an embodiment, UE 102 may be configured to communicate orthogonal frequency division multiplexing (OFDM) communication signals with eNB 104 via a multi-carrier communication channel in accordance with orthogonal frequency division multiple access (OFDMA) communication techniques. The OFDM signal can include multiple orthogonal subcarriers.

The S1 interface 115 is an interface that separates the RAN 101 from the EPC 120. The S1 interface is divided into two parts: S1-U, which carries traffic data between the eNB 104 and the serving GW 124; and S1-MME, which is a messaging interface between the eNB 104 and the MME 122. The X2 interface is an interface between the eNBs 104. The X2 interface consists of two parts, X2-C and X2-U. X2-C is the control plane interface between the eNBs 104, and X2-U is the user plane interface between the eNBs 104.

In the case of a cellular network, the LP cell is typically used to extend coverage to indoor areas that are not reachable by outdoor signals, or to add network capacity in areas of extremely dense telephone usage such as stations. As used herein, the term low power (LP) eNB refers to any suitable relatively low power eNB for implementing, for example, a femtocell, a picocell, or a picocell. Or a narrower cell of a microcell (narrower than a macrocell base station). A femtocell base station eNB is typically provided to its home or business consumer by a mobile network operator. A femtocell base station is typically equal to or less than the size of a residential gateway and is typically connected to a user's broadband line. Once the femtocell base station is plugged in, the femtocell base station is connected to the mobile operator's mobile network and provides additional coverage areas for the residential femtocell base station, typically ranging from 30 meters to 50 meters. Thus, the LP eNB may be a femtocell base station eNB because the LP eNB is coupled via the PDN GW 126. Similarly, picocell base stations are typically wireless communication systems that cover small areas, such as in buildings (offices, shopping centers, train stations, etc.), or more recently on airplanes. The picocell base station eNB may in general be connected to another eNB via an X2 link, such as via a base station controller (BSC) function of the picocellular base station eNB, to the macro eNB. Thus, the LP eNB can be implemented using the picocell base station eNB because the LP eN is coupled to the macro eNB via the X2 interface. The picocell base station eNB or other LP eNB may incorporate some or all of the functionality of the macro eNB. In some cases, this may be referred to as an access point base station or a corporate femtocell base station.

In some embodiments, the downlink resource gate can be used for downlink transmissions from eNB 104 to UE 102, while uplink transmissions from UE 102 to eNB 104 can utilize similar techniques. A grid can be a time-frequency grid, called a resource grid or a time-frequency resource grid, which is an entity resource in the lower row of each slot. This time-frequency plane is represented as a common practice for OFDM systems, which makes the OFDM system intuitive for radio resource allocation. Each row and each column pair in the resource grid should be on an OFDM symbol and an OFDM subcarrier, respectively. The duration of the resource grid in the time domain corresponds to one slot in the radio frame. The smallest time-frequency unit in the resource grid is represented as a resource element (RE). Each resource grid contains a number of resource blocks (RBs) that describe the mapping of certain physical channels to resource elements. Each resource block contains a collection of resource elements in the frequency domain and may represent the smallest quantum of the currently assignable resources. There are several different physical downlink channels that are delivered using such resource blocks. With particular reference to the present disclosure, two of these physical downlink channels are physical downlink shared channels and physical downlink control channels.

The Physical Downlink Shared Channel (PDSCH) carries user data and higher layer messaging to the UE 102 (Fig. 1). The Physical Downlink Control Channel (PDCCH) carries information about the transport format and resource allocation associated with the PDSCH channel. The Physical Downlink Control Channel (PDCCH) also informs the UE 102 of the transport format, resource allocation, and hybrid automatic repeat request (HARQ) information associated with the uplink shared channel. In general, downlink scheduling (eg, assigning control and shared channel resource blocks to UEs 102 within a cell) may be performed at the eNB 104 based on channel quality information fed back from the UE 102 to the eNB 104, and may then be Downlink resource assignment information is sent to the UE 102 on a Control Channel (PDCCH) for (assigned to) the UE 102.

The PDCCH uses CCE (Control Channel Element) to convey control information. Before being mapped to resource elements, the PDCCH complex-valued symbols are first organized into quads, which then replace the sub-block interleaver for rate matching. Each PDCCH is transmitted using one or more of these Control Channel Elements (CCEs), where each CCE corresponds to nine sets of four physical resource elements called Resource Element Groups (REGs). Four QPSK symbols are mapped to each REG. The PDCCH may use one or more transmissions in the CCE, depending on the size of the DCI and the channel conditions. There may be four or more different PDCCH formats (eg, aggregation steps, L=1, 2, 4, or 8) defined in LTE with different CCEs.

As used herein, the term circuit may refer to, belong to, or include an application specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or group) or memory that executes one or more software or firmware programs. Body (shared, dedicated or group), combinatorial logic, or other suitable hardware component that provides the described functionality. In some embodiments, the circuitry can be implemented in one or more software or firmware modules, or the functions associated with the circuitry can be implemented by one or more software or firmware modules. In some embodiments, the circuitry can include logic that is at least partially operable in hardware. Embodiments described herein can be implemented into the system using any suitably assembled hardware and/or software.

2 is a functional diagram of a User Equipment (UE) in accordance with some embodiments. UE 200 may be suitable for use as UE 102 as depicted in FIG. In some embodiments, the UE 200 can include an application circuit 202, a baseband circuit 204, a radio frequency (RF) circuit 206, a front end module (FEM) circuit 208, and one or more antennas 210 coupled together at least as shown. In some embodiments, other circuits or configurations may include one or more components or components of application circuit 202, baseband circuit 204, RF circuit 206, or FEM circuit 208, and in some cases may include other components or components. As an example, a "processing circuit" can include one or more components or components, some or all of which may be included in application circuit 202 or baseband circuit 204. As another example, a "transceiver circuit" can include one or more components or components, some or all of which may be included in RF circuit 206 or FEM circuit 208. However, such examples are not limiting as the processing circuitry or transceiver circuitry may also include other components or components under some circumstances.

Application circuit 202 can include one or more application processors. For example, application circuit 202 can include circuitry such as, but not limited to, one or more single core or multi-core processors. A processor can include any combination of general purpose processors and special purpose processors (eg, graphics processors, application processors, etc.). The processor can be coupled to the memory/storage and/or can include a memory/storage and can be configured to execute instructions stored in the memory/storage to allow various applications and/or operating systems to be in the system Run on.

The baseband circuit 204 can include circuitry such as, but not limited to, one or more single core or multi-core processors. The baseband circuit 204 can include one or more baseband processors or control logic to process the baseband signals received from the receive signal path of the RF circuitry 206 and to generate a baseband signal for the transmit signal path of the RF circuitry 206. The baseband processing circuitry 204 can interface with the application circuitry 202 for generating and processing baseband signals and for controlling the operation of the RF circuitry 206. For example, in some embodiments, the baseband circuit 204 can include a second generation (2G) baseband processor 204a, a third generation (3G) baseband processor 204b, a fourth generation (4G) baseband processor 204c, or Other baseband processors 204d for generations (e.g., fifth generation (5G), 6G, etc.) that will be developed by other existing generations, in development, or in the future. The baseband circuitry 204 (e.g., one or more of the baseband processors 204a-d) can handle various radio control functions that allow communication with one or more radio networks via the RF circuitry 206. Radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, and the like. In some embodiments, the modulation/demodulation circuitry of the baseband circuit 204 can include Fast Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality. In some embodiments, the encoding/decoding circuitry of the baseband circuit 204 may include convolution, tail-biting convolution, turbo, Viterbi, or low density parity check (LDPC). Encoder/decoder function. Embodiments of the modulation/demodulation and encoder/decoder functions are not limited to these examples, and other suitable functions may be included in other embodiments.

In some embodiments, the baseband circuit 204 can include elements of a protocol stack, such as elements of an Evolved Unified Terrestrial Radio Access Network (EUTRAN) protocol, including, for example, a physical (PHY), media access control (MAC), radio. Link Control (RLC), Packet Data Convergence Protocol (PDCP) or Radio Resource Control (RRC) components. The central processing unit (CPU) 204e of the baseband circuit 204 can be configured to operate elements of a protocol stack for communication of the PHY layer, the MAC layer, the RLC layer, the PDCP layer, or the RRC layer. In some embodiments, the baseband circuit can include one or more audio digital signal processors (DSPs) 204f. The audio DSP 204f may include elements for compression/decompression and echo cancellation, and may include other suitable processing elements in other embodiments. The components of the baseband circuit can be suitably combined in a single wafer, in a single wafer set, or in some embodiments on the same circuit board. In some embodiments, some or all of the constituent components of the baseband circuit 204 and the application circuit 202 can be implemented together on, for example, a system single chip (SOC).

In some embodiments, baseband circuitry 204 can provide communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit 204 can support an evolved unified terrestrial radio access network (E-UTRAN) or other wireless metropolitan area network (WMAN), wireless local area network (WLAN), or wireless personal area. Network (WPAN) communication. Embodiments in which the baseband circuit 204 is configured to support radio communication for more than one wireless protocol may be referred to as a multi-mode baseband circuit.

The RF circuit 206 can use modulated electromagnetic radiation through the non-solid media to allow communication with the wireless network. In various embodiments, RF circuitry 206 may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. The RF circuit 206 can include a receive signal path that can include circuitry to downconvert the RF signal received from the FEM circuit 208 and provide the baseband signal to the baseband circuit 204. The RF circuit 206 can also include a transmit signal path that can include circuitry to upconvert the baseband signal provided by the baseband circuit 204 and provide the RF output signal to the FEM circuit 208 for transmission.

In some embodiments, RF circuitry 206 can include a receive signal path and a transmit signal path. The receive signal path of the RF circuit 206 can include a mixer circuit 206a, an amplifier circuit 206b, and a filter circuit 206c. The transmit signal path of RF circuit 206 can include filter circuit 206c and mixer circuit 206a. The RF circuit 206 also includes a synthesizer circuit 206d for synthesizing frequencies for use by the mixer circuit 206a that receives the signal path and the transmission signal path. In some embodiments, the mixer circuit 206a that receives the signal path can be configured to down convert the RF signal received from the FEM circuit 208 based on the synthesized frequency provided by the synthesizer circuit 206d. The amplifier circuit 206b can be assembled to amplify the downconverted signal, and the filter circuit 206c can be a low pass filter (LPF) or a band pass filter (BPF), the low pass filter or the band pass filter being grouped The signal from the down conversion is used to remove unwanted signals to produce an output baseband signal. The output baseband signal can be provided to the baseband circuit 204 for further processing. In some embodiments, the output baseband signal can be a zero frequency baseband signal, but this is not a requirement. In some embodiments, the mixer circuit 206a that receives the signal path can include a passive mixer, although the scope of the embodiments is not limited in this respect. In some embodiments, the mixer circuit 206a of the transmit signal path can be configured to upconvert the input baseband signal based on the synthesized frequency provided by the synthesizer circuit 206d to generate an RF output signal for the FEM circuit 208. The baseband signal can be provided by the baseband circuit 204 and can be filtered by the filter circuit 206c. The filter circuit 206c may include a low pass filter (LPF), but the scope of the embodiments is not limited in this respect.

In some embodiments, the mixer circuit 206a that receives the signal path and the mixer circuit 206a that transmits the signal path may include two or more mixers, and may be configured for quadrature down conversion or Upconversion. In some embodiments, the mixer circuit 206a that receives the signal path and the mixer circuit 206a that transmits the signal path may include two or more mixers and may be configured for image rejection (eg, Hart Hartley image rejection). In some embodiments, the mixer circuit 206a and the mixer circuit 206a that receive the signal path can each be configured for direct down conversion or direct up conversion. In some embodiments, the mixer circuit 206a that receives the signal path and the mixer circuit 206a that transmits the signal path can be assembled for superheterodyne operation.

In some embodiments, the output baseband signal and the input baseband signal may be analogous baseband signals, although the scope of the embodiments is not limited in this respect. In some alternative embodiments, the output baseband signal and the input baseband signal can be digital baseband signals. In such alternate embodiments, RF circuitry 206 may include analog to digital converters (ADCs) and digital to analog converter (DAC) circuitry, and baseband circuitry 204 may include a digital baseband interface to communicate with RF circuitry 206. In some dual mode embodiments, separate radio IC circuits may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

In some embodiments, the synthesizer circuit 206d can be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect, as other types of frequency synthesizers may be suitable. For example, the synthesizer circuit 206d can be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer including a phase-locked loop with a frequency divider. The synthesizer circuit 206d can be assembled to synthesize the output frequency based on the frequency input and the divider control input for use by the mixer circuit 206a of the RF circuit 206. In some embodiments, the synthesizer circuit 206d can be a fractional N/N+1 synthesizer. In some embodiments, the frequency input can be provided by a voltage controlled oscillator (VCO), but this is not a requirement. The divider control input can be provided by the baseband circuit 204 or the application processor 202 depending on the desired output frequency. In some embodiments, the divider control input (eg, N) can be determined from the lookup table based on the channel indicated by the application processor 202.

The synthesizer circuit 206d of the RF circuit 206 can include a frequency divider, a delay locked loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider can be a dual mode frequency divider (DMD) and the phase accumulator can be a digital phase accumulator (DPA). In some embodiments, the DMD may be assembled to divide the input signal by N or N+1 (eg, based on implementation) to provide a fractional allocation ratio. In some exemplary embodiments, the DLL may include a set of cascaded, tunable delay elements, phase detectors, charge pumps, and D-type flip-flops. In such embodiments, the delay elements can be configured to split the VCO period into Nd equal packets of phase, where Nd is the number of delay elements in the delay line. In this way, the DLL provides a negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

In some embodiments, synthesizer circuit 206d may be assembled to generate a carrier frequency as an output frequency, while in other embodiments, the output frequency may be a multiple of a carrier frequency (eg, twice the carrier frequency, quadruple carrier frequency) And combining the orthogonal generator and the frequency divider circuit for generating a plurality of signals with a carrier frequency having a plurality of phases different from each other. In some embodiments, the output frequency can be the LO frequency (fLO). In some embodiments, RF circuit 206 can include an IQ/polarity converter.

FEM circuit 208 can include a receive signal path that can be configured to operate on RF signals received from one or more antennas 210, amplify the received signals, and provide an amplified version of the received signals to RF circuitry 206 For circuits for further processing. FEM circuit 208 may also include a transmission signal path that may be included to amplify signals provided by RF circuit 206 for transmission for transmission by one or more of one or more antennas 210.

In some embodiments, FEM circuit 208 can include a TX/RX switch to switch between transmission mode operation and receive mode operation. The FEM circuit can include a receive signal path and a transmit signal path. The receive signal path of the FEM circuit can include a low noise amplifier (LNA) to amplify the received RF signal and provide an amplified received RF signal as an output (eg, to RF circuit 206). The transmit signal path of FEM circuit 208 may include a power amplifier (PA) for amplifying the input RF signal (eg, provided by RF circuit 206) and for generating for subsequent transmission (eg, by one or more antennas 210) One or more filters of one or more of the RF signals. In some embodiments, the UE 200 may include additional components such as, for example, a memory/storage, a display, a camera, a sensor, or an input/output (I/O) interface.

3 is a functional diagram of an evolved Node B (eNB) in accordance with some embodiments. It should be noted that in some embodiments, eNB 300 can be a fixed, non-mobile device. The eNB 300 may be suitable for use as the eNB 104 as depicted in FIG. The eNB 300 may include a physical layer circuit 302 and a transceiver 305, one or both of which may allow transmission of signals to the UE 200, other eNBs, other UEs or other devices using one or more antennas 301 and Signals are received from UE 200, other eNBs, other UEs, or other devices. As an example, the physical layer circuitry 302 can perform various encoding and decoding functions, which can include forming a baseband signal for transmission and decoding the received signal. As another example, transceiver 305 can perform various transmissions and receive work, such as conversion of a signal between a fundamental frequency range and a radio frequency (RF) range. Thus, physical layer circuit 302 and transceiver 305 can be separate components or can be part of a combined component. In addition, some of the functions associated with the transmission and reception of signals may be performed by a combination of one, any or all of the physical layer circuitry 302, the transceiver 305, and other components or layers. The eNB 300 may also include a medium access control layer (MAC) circuit 304 for controlling access to the wireless medium. The eNB 300 may also include processing circuitry 306 and memory 308 configured to perform the operations described herein. The eNB 300 may also include one or more interfaces 310 that may allow for communication with other components, including other eNBs 104 (FIG. 1), components of the EPC 120 (FIG. 1), or others. Network component. Additionally, interface 310 may allow for communication with other components not shown in FIG. 1, including other components external to the network. Interface 310 can be wired or wireless, or a combination thereof.

Antennas 210, 301 may include one or more directional or omnidirectional antennas including, for example, dipole antennas, monopole antennas, block antennas, loop antennas, microstrip antennas, or other types of antennas suitable for transmission of RF signals. In some multiple input multiple output (MIMO) embodiments, the antennas 210, 301 can be effectively separated to take advantage of the resulting spatial diversity and different channel characteristics.

In some embodiments, the UE 200 or the eNB 300 can be a mobile device and can be a portable wireless communication device, such as a personal digital assistant (PDA), a wireless communication capable laptop or a portable computer, Web tablet, wireless phone, smart phone, wireless headset, pager, instant messaging device, digital camera, access point, television, wearable such as medical equipment (eg heart rate monitor, blood pressure monitor, etc.) A device, or other device that can receive or transmit information wirelessly. In some embodiments, UE 200 or eNB 300 may be assembled to operate in accordance with 3GPP standards, although the scope of the embodiments is not limited in this respect. In some embodiments, a mobile device or other device may be configured to operate in accordance with other protocols or standards, including IEEE 802.11 or other IEEE standards. In some embodiments, the UE 200, eNB 300, or other device may include one of a keyboard, a display, a non-electric memory cartridge, multiple antennas, a graphics processor, an application processor, a speaker, and other mobile device components or Multiple. The display can be an LCD screen including a touch screen.

Although UE 200 and eNB 300 are each illustrated as having a plurality of separate functional elements, one or more of the functional elements may be combined and may be assembled by software, such as processing elements including digital signal processors (DSPs) or A combination of other hardware components is implemented. For example, some components may include one or more microprocessors, DSPs, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio frequency integrated circuits (RFICs), and for performing at least the purposes described herein. A combination of various hardware and logic circuits of functionality. In some embodiments, a functional element can refer to one or more processes operating on one or more processing elements.

Embodiments can be implemented in one or a combination of hardware, firmware, and software. Embodiments can also be implemented as instructions stored on a computer readable storage device, which can be read and executed by at least one processor to perform the operations described herein. The computer readable storage device can include any non-transitory mechanism for storing information in a form readable by a machine (eg, a computer). For example, computer readable storage devices may include read only memory (ROM), random access memory (RAM), disk storage media, optical storage media, flash memory devices, and other storage devices and media. Some embodiments may include one or more processors and may be assembled by instructions stored on a computer readable storage device.

It should be noted that in some embodiments, the devices used by UE 200 or eNB 300 may include various components of UE 200 or eNB 300 as shown in Figures 2-3. Accordingly, the techniques and operations described herein involving UE 200 (or 102) may be applicable to devices of the UE. Additionally, the techniques and operations described herein involving eNB 300 (or 104) may be applicable to devices of an eNB.

FIG. 4 illustrates an example of multi-beam transmission in accordance with some embodiments. Although the exemplary scenarios 400 and 450 depicted in FIG. 4 may exemplify some aspects of the techniques disclosed herein, it will be understood that the embodiments are not limited by the exemplary scenarios 400 and 450. Embodiments are not limited to the number and type of components shown in FIG. 4, and are not limited to the number and configuration of transmission beams shown in FIG.

In the exemplary scenario 400, the eNB 104 may transmit signals on a plurality of beams 405-420, any or all of which may be received at the UE 102. It should be noted that the number of beams or transmission angles as shown is not limiting. Because beams 405-420 can be directional, the transmitted energy from beams 405-420 can be concentrated in the directions shown. Thus, due to the relative location of the UEs 102, the UE 102 may not necessarily receive a significant amount of energy from the beams 405 and 410 under some conditions.

UE 102 can receive a significant amount of energy from beams 415 and 420 as shown. As an example, beams 405-420 can be transmitted using different reference signals, and UE 102 can determine channel state information (CSI) feedback or other information for beams 415 and 420. In some embodiments, each of the beams 405-420 is configured as a CSI reference signal (CSI-RS). In a related embodiment, the CSI-RS signal is part of a Discovery Reference Signaling (DRS) configuration. The DRS configuration can be used to inform the UE 102 that the physical resources (eg, subframes, subcarriers) in which the CSI-RS signals are to be found. In a related embodiment, the UE 102 is further informed of any codec sequences that will be applied to the CSI-RS.

In some embodiments, up to 2 MIMO layers can be transmitted in each beam by using different polarizations. More than two MIMO layers can be transmitted by using multiple beams. In a related embodiment, the UEs are configured to explore available beams and report the discovered beams to the eNB prior to MIMO data transmission using suitable reporting messages. Based on the report message, the eNB 104 can determine a suitable beam direction for the MIMO layer to be used for communicating with the data of the UE 102. In various embodiments, there may be up to 2, 4, 8, 16, 32 or more MIMO layers depending on the number of MIMO layers supported by eNB 104 and UE 102. In a given scenario, the number of MIMO layers that may actually be used will depend on the quality of the communications received at the UE 102, and arriving at the UE 102 at different angles such that the UE 102 can distinguish the data carried on the separate beams. The availability of reflected beams.

In the exemplary scenario 450, the UE 102 may determine angles or other information (such as CSI feedback, channel quality indicator (CQI), or other) for the beams 465 and 470. The UE 102 may also determine such information when received at other angles, such as the illustrated beams 475 and 480. Beams 475 and 480 are distinguished using a dashed configuration to indicate that the beams may not necessarily be transmitted at the same angle, but UE 102 may use such techniques as receive beamforming to determine the beam directions of beams 475 and 480 as the receive direction. . This may occur, for example, when a transmission beam is reflected from an object near the UE 102 and arrives at the UE 102 based on the angle of reflection of the transmission beam rather than the angle of incidence.

In some embodiments, UE 102 may transmit one or more Channel Status Information (CSI) messages to eNB 104 as a report message. However, embodiments are not limited to dedicated CSI messages because UE 102 may include relevant reporting information in control messages or other types of messages that may or may not be dedicated to communications of CSI type information.

As an example, the first signal received from the first eNB 104 can include a first directional beam based at least in part on the first CSI-RS signal and a second directional beam based at least in part on the second CSI-RS signal. The UE 102 may determine a Level Indicator (RI) for the first CSI-RS and an RI for the second CSI-RS, and may transmit both RIs in the CSI message. Additionally, the UE 102 can determine one or more RIs for the second signal, and in some cases can also include the one or more RIs in the CSI message. In some embodiments, the UE 102 may also determine a CQI, a precoding array indicator (PMI), a reception angle, or other information for one or both of the first signal and the second signal. This information can be included in one or more CSI messages together with one or more RIs. In some embodiments, the UE 102 uses a CSI-RS signal for reference signal received power (RSRP) measurements, received signal strength indication (RSSI) measurements, reference signal received quality (RSRQ) measurements, or the like. Some combinations of measurements.

As an example, the first signal received from the eNB 104 can include a first directional beam based at least in part on the first CSI-RS signal and a second directional beam based at least in part on the second CSI-RS signal. The UE 102 may determine a first measurement for the first directional beam and a second measurement for the second directional beam. Additionally, the UE 102 can determine a first CQI and a second CQI related to receiving signals at the first angle and the second angle. The UE 102 can also determine a selected angle between the first angle and the second angle, wherein the CQI for receiving the first signal at the selected angle is greater than the first CQI and the second CQI. In some cases, the selected angle may be a better angle for reception than the first angle and the second angle.

In some embodiments, in addition to or in lieu of other CSI feedback described herein, the selected angle or CQI for reception of the first signal at the selected angle may be one or more Indicated in the CSI message. In some embodiments, the UE 102 may be grouped by the higher layer according to one or more CSI processes according to the serving cell. Each CSI process can be associated with CSI Reference Signal (CSI-RS) resources and CSI Interference Measurement (CSI-IM).

In some embodiments, the beam exploration procedure may be facilitated by the UE 102 measuring the CSI-RS resources corresponding to different beam directions and reporting for the plurality of beamforming CSI-RS resources. For example, the beamformed CSI-RS resources may be DRS-CSI-RS resources that are part of the DRS configuration for UE 102. The UE 102 can use the assembled DRS-CSI-RS resources for measurement and reporting (eg, using RSRP measurements). In this example, the received RSRP report corresponding to the beamformed DRS-CSI-RS resource may be used by the eNB to identify candidate beams for single-user MIMO (SU-MIMO) transmission.

5A, 5B, and 5C are diagrams illustrating beam directivity of multi-beam operation in more detail, in accordance with some embodiments. The context 500 is depicted in Figure 5A, where the eNB 104 transmits a series of beam discovery signal beams 502 at the various beamforming angles depicted. For clarity, the discovery signal beam 502 is shown for a sector, particularly between -60° and 60°, but it will be appreciated that the discovery signal transmission by the eNB 104 may also be in other sectors. transmission.

As described above with respect to FIG. 4, the angle at which the individual discovery beam 502 is received by the UE 102 can vary significantly depending on each individual beam system being received as a line of sight, or from other objects, buildings, or other structures near the UE 102 or cycle. reflection.

It is worth noting that the exploration beam 502 is closely spaced in an angular sense. This inter-microwave beam angular separation can be produced by using oversampled DFT vectors to provide spatial resolution, such as techniques for generating overlapping beams, as shown. In some cases, adjacent overlapping beams are used to reduce edge effects in frequency selective precoding. However, for spatial multiplexing using MIMO, closely spaced overlapping beams are sub-optimal because the beams can interfere with each other.

When the UE 102 receives the discovery beam 502, each of which may carry a CSI-RS in accordance with some embodiments, the UE evaluates the quality of each beam (e.g., via RSRP, RSRQ, or other measurements), and for which eNB 104 can determine The beam for use with MIMO transmission is reported to the eNB 104. An example of this report is the DRS-CSI-RS RSRP report. Given the large number of exploration beams 502, the UE 102 reports that the beam quality or other measurements for each individual beam of the exploration beam 502 may be impractical due to the messaging management burden that would be necessary for this report.

To reduce the burden of beam discovery communication management, in some embodiments, the decision as to whether UE 102 is transmitting a report for a given beam may only be limited to a candidate beam that is best performed as evaluated by UE 102. In an example, the reporting decision is made by the UE 102 based on one or more of the following reporting selection criteria: CSI-RS resource beam quality (eg, RSRP) exceeding the top N beams of the predefined absolute threshold; or CSI - The first M beams of the RS resource-efficient energy measurement offset relative to the reference CSI-RS resource exceeding a predefined threshold; N and M are defined numerical quantities representing the maximum number of candidate beams to be reported. For example, N and M may be the limits of four, eight, and six equal wave speeds to be reported to the eNB 104.

This report selection criterion, such as the application of RSRP, may select the strongest received beam as the candidate beam, but the criterion fails to account for the angular proximity of the candidate beams, resulting in the possibility of overlapping, mutually interfering beams. The combination of overlapping, mutually interfering beams presents the next best diversity of beam directions for use with spatial multiplexing such as SU-MIMO.

By way of example, in Figure 5A, two clusters from all of the search beams in the search beam 502, i.e., beam cluster 504 and beam cluster 506, are sufficient for the UE 102 to carry SU-MIMO communications with the two clusters. Received signal power is received.

FIG. 5B illustrates an example of the received signal power of the probe beam 502 as measured by the UE 102. For clarity and comparison with Figure 5A, the receive beam angle is depicted in Figure 5B as being consistent with the direction of the transmission angle. Received beam clusters 504' and 506' correspond to transmission discovery beam clusters 504 and 506, respectively. It is worth noting that the received beam clusters 504' and 506' include beams that exceed the reporting threshold 508.

According to various embodiments, as discussed above, reporting threshold 508 may be defined as an absolute threshold, or as a relative threshold based on some differences from a reference signal, such as, for example, a maximum RSRP beam. In a related embodiment, the report threshold 508 may be assembled by the eNB 504 in the UE 102.

Although the beams from the received beam clusters 504' and 506' exceed the reporting threshold 508 in this example, in embodiments where only the first four beams will be reported to the eNB 104, only the beam cluster 504 will be reported (eg, The beams among the received beam clusters 504') are all in the received beam cluster 504' because the first four beams (e.g., based on RSRP measurements). Therefore, the spatially diverse beams from the received beam cluster 506' will not be reported to the eNB 104 and will therefore not be available for use in SU-MIMO communications.

According to some aspects of the embodiment, the reporting selection criteria for reporting candidate beams by the UE 102 to the eNB 104 are based on signal power measurements and the received beam prioritization is weighted based on the angular spacing of the beam directions. In a related embodiment, in the example of FIGS. 5A-5B, some of the power measurements of the beams of the received beam cluster 504' are discounted such that the report of the candidate beams is included from among the received beam clusters 506' One or more beams.

FIG. 5C illustrates exemplary results of an application of Beam Received Power Measurement Correction (BRPMC) in accordance with some embodiments. As depicted, the corrected received beam cluster 514 represents the result of the BRPMC applied to the received beam cluster 504', and the corrected received beam cluster 516 represents the result of the BRPMC applied to the received beam cluster 506'.

The corrected received beam bundle 514 has individual beams 514A, 514B, and 514C that exceed the threshold 508, and the corrected received beam cluster 516 has a separate beam 516A that exceeds the threshold 508. The first four received beams 514A-C and 516A that meet the reporting selection criteria may be reported to the eNB 104.

In some embodiments, the BRPMC is applied as a scaling or discount for the received power measurement relative to the angular offset of the primary beam relative to each beam bundle. In other embodiments, the BRPMC is applied as an exclusion of certain beams based on the angular proximity of certain beams to the primary beam of each cluster. In a related embodiment, the application of the BRPMC prior to the application of the beam is based on the received signal power of the beam and priority weighting is given to the beams based on the angular separation of the beams. In an example, beams having a larger angular separation from each other are given a larger (and more preferential) weight.

6A-6C are graphs depicting beam received power measurement correction (BRPMC) functions in accordance with various embodiments. In FIGS. 6A-6C, scaling functions 600, 620, and 630 are illustrated, respectively, in accordance with some embodiments, wherein the scaling factors are plotted along a vertical axis and the offset angles are plotted along a horizontal axis. A scale factor of 1.0 indicates no scaling, and a scale factor of zero indicates a complete exclusion of the portion of the received power measurement. The vertical axis of 0° can be aligned with the main beam of a given cluster of beams.

Turning first to Figure 6A, the BRPMC function 600 includes a non-scaling portion 602 centered at a zero offset angle. In a related embodiment, the angular extent of the non-scaling portion 602 is narrow such that the non-scaling portion passes the primary beam of the beam cluster, rather than the adjacent beam. Discount portion 604 scales the beam having the angular offset closest to the primary beam. In the depicted embodiment, the discount is greatest for the beam closest to the primary beam and gradually relaxed (i.e., reduced) for beams that are at a larger angular offset relative to the primary beam in the center. The function distribution for the discount portion 604 can be linear (604A) or exponential (604B, 604C) in various embodiments. In addition to the discount portion 604 of the BRPMC function 600, the discount function 600 is no longer applicable, as indicated by the non-scaled perimeter 606.

The BRPMC function 620 as depicted in Figure 6B blocks the main beam of the cluster. There is no non-scaled portion in the center. Discount portion 624 is applied at a zero offset angle and gradually relaxes with an increased angular offset relative to the center, as indicated at 624A, 624B or 624C. At the periphery of 626, beam clustering is not discounted.

Figure 6C illustrates a BRPMC function 630 having a non-scaled portion 632 in the center to deliver the primary beam of the cluster, and a beam missing portion to reject all beams within a defined angular offset relative to the center 634. The beam to the periphery of 636 is not discounted.

In a related embodiment, some parameters of the BRPMC function or BRPMC function are grouped by the eNB 104 in the UE 102. In one such example, the BRPMC parameters can be assembled for each reference signal, and the UE 102 performs a received power measurement for each of the reference signals. In another example, a set of BRPMC parameters can be assembled for use by UE 102, with different parameter settings being applied to different discovery reference signals or beams. In a related embodiment, the eNB and UE 102 according to a beam index between the reference beam and to explore the difference between the measurement beams _{(e.g., P d (abs (k-} k ')) to identify a particular beam, wherein a signal indicating an amount of power P _d The discount is measured, k' is the index of the reference beam, and k is the index of the measurement beam.

In a related embodiment, the Pd parameter for the target beam may be calculated by the eNB 102 by calculating the antenna weight corresponding to the target beam and labeled w (where w is N _tx by 1 dimensional vector, where N _tx is the number of transmit antennas) The vector is determined by the square of the scalar product between the vectors of the antenna weights corresponding to the reference beam and labeled w _ref , for example, |w ^H •w _ref | ² , where () ^H is Hermitian Yoke operation.

7 is a flow diagram illustrating an exemplary process of operating a UE to identify candidate beams for single-user multiple input/multiple output (SU-MIMO) operation, in accordance with some embodiments. An exemplary process may be performed by UE 102 or by UE devices having different architectures. It is worth noting that the process is a process that is performed autonomously (ie, in the absence of user interaction). Additionally, it is important to note that the process is a feature-rich embodiment that can be implemented as described; in addition, portions of the process can be practiced in various embodiments to exclude other portions. The following additional notes and examples section unrestrictedly detail the various combinations covered. It should also be noted that in various embodiments, certain process operations may be performed in a different order than depicted in FIG.

At operation 702, the UE receives configuration information from an eNB (such as eNB 104) that assembles the UE for beam metrology. At 704, a beam discovery communication, such as DRS-CSI-RS communication, is received from the eNB, the beam exploration signaling beams having different angular directions. Iterative decision 706 and operation 708 are as illustrated to determine signal power and directionality information for each received beam. In some embodiments, each of the exploration beams includes an indication of its angular orientation, which may be a direction indicator, or an indicator value.

Once all directional beams have been received and measured, operation 710 applies the received power measurement threshold to identify potential candidate beams. This operation uses beams from further processing to exclude registered low received power. At 712, the angular direction of the potential candidate beam and the received power of the measured beam (eg, RSRP) are evaluated to identify the received beam clusters available for MIMO communication. At 714, the primary beam of each cluster is identified. At 716, a discount based on the angular offset (eg, BRPMC) is applied to each identified cluster of received beams. The result of this operation is a discount of the measured power of the beam that overlaps the available beam spaced apart for the angle of MIMO communication.

At 718, a reporting restriction criterion (eg, the maximum amount of beam to be reported) is applied to the discounted measurement beam to generate a report message. At 720, the report message is sent to the eNB. At 722, the UE receives spatial multiplex data about the beam with direction from the eNB based on the report.

8 is a flow diagram illustrating an exemplary process for operating an eNB to assemble a UE to identify and report candidate beams for single-user multiple input/multiple output (SU-MIMO) operation, in accordance with some embodiments. As depicted, at 802, the eNB transmits configuration information for beam metrology to the UE. The configuration information may include parameters such as BRPMC parameters, report selection criteria, beam reporting limits, thresholds for detecting potential candidate beams, and the like. At 804, the eNB transmits the discovery signals in different beam directions, as described above. In a related embodiment, directional information is provided along with the discovery signal. The directional information may indicate the angle of beamforming, or an indicator associated with the beam direction.

At 806, the eNB receives a report message from the UE that identifies the beam direction of the candidate beam that is explored and determined to be suitable for SU-MIMO in accordance with any suitable embodiment described above. In response, at 808, the eNB determines a suitable SU-MIMO mode of operation. The eNB processes the report message to determine whether the SU-MIMO communication is suitable for the UE based on the reported energy measurement. Numerous other factors may be considered by the eNB in making decisions, including factors such as inter-cell interference, the amount of other UEs in the cell, the degree of mobility of the UE, and the like. When SU-MIMO is appropriate, the eNB determines the MIMO parameters to use including the number of MIMO layers to be used, the beam direction, the per-beam data rate, and the like. Based on the determined SU-MIMO parameters, at 810, the eNB transmits the message using the selected SU-MIMO parameters.

Advantageously, some of the embodiments described herein provide new operational solutions that may be utilized in some embodiments for existing operational UE and eNB architectures to report for available SU-MIMO operations. A viable, angularly diverse beam direction. Angle diversity facilitates the use of selected beam angles that avoid the selection of closely spaced beams that would otherwise be able to bother each other. Additional notes and examples:

Example 1 is a device for a User Equipment (UE) having single-user multiple input/multiple output (SU-MIMO) operability, the device including a transceiver circuit and a processing circuit, The processing circuit is configured to: control the transceiver circuit to receive, from the evolved Node B (eNB), a plurality of discovery signals carried via the corresponding directional beam, the corresponding directional beams having various angular directions; determining the received signals of the corresponding directional beams of the search signal Power measurement and directional information; determining a set of candidate beam directions from the directional beams according to the selection criterion, the selection criteria are based on signal power measurement and the angular spacing of the beam directions determined based on the directional information is used for priority weighting And transmitting a report message to the eNB, the report message identifying a set of candidate beam directions.

In Example 2, the subject matter of Example 1 optionally includes, wherein the processing circuit is further configured to: control the transceiver circuit to receive from the set of candidate beam directions via the plurality of SU-MIMO layers from the evolved Node B (eNB) At least a portion of the transmitted spatial multiplex data communication.

In Example 3, the subject matter of any one or more of Examples 1 through 2 is selectively included, wherein the processing circuit is further configured to: control the transceiver circuit to receive selection criteria from the evolved Node B (eNB).

In Example 4, the subject matter of any one or more of Examples 1 through 3 selectively includes, wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam space.

In Example 5, the subject matter of any one or more of Examples 1 through 4 is selectively included, wherein the discovery signal comprises a channel state information (CSI) reference signal.

In Example 6, the subject matter of any one or more of Examples 1 through 5 is selectively included, wherein the received signal power is measured as a Reference Signal Received Power (RSRP) measurement.

In Example 7, the subject matter of any one or more of Examples 1 through 6 is selectively included, wherein the directionality information includes an angle indication value.

In Example 8, the subject matter of any one or more of Examples 1 through 7 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 9, the subject matter of any one or more of Examples 1 through 8 is selectively included, wherein a selection criterion for candidate beam selection is based on an angular orientation of each of the probe signals relative to the primary probe signal to define each A discounted use of the received signal power measurement of the discovery signal, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 10, the subject matter of Example 9 optionally includes wherein the selection criteria for candidate beam selection defines the amount of received signal power for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal Used to measure the discount, the primary discovery signal has the largest signal power measurement among the clusters of received discovery signals.

In Example 11, the subject matter of any one or more of Examples 9 through 10 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the probe signals relative to the reference discovery signal. Exploring the discounted use of the received signal power measurement of the signal.

In Example 12, the subject matter of any one or more of Examples 9 through 11 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 13, the subject matter of any one or more of Examples 9 through 12 is selectively included, wherein a selection criterion for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 14, the subject matter of any one or more of Examples 1 through 13 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the processing circuit to select the first candidate beam direction to match the reference signal In the beam direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 15, the subject matter of Example 14 selectively includes, wherein the selection criteria for candidate beam selection, when applied, cause the processing circuit to further select a second candidate beam direction having a relative candidate relative to the first candidate The beam direction is offset by the beam direction, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 16, the subject matter of any one or more of Examples 14 through 15 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the processing circuit to further select a second candidate beam direction, the second The candidate beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In Example 17, the subject matter of any one or more of Examples 1 through 16 is selectively included, wherein the processing circuit includes a baseband processor to decode the plurality of received discovery signals.

In Example 18, the subject matter of Example 18 optionally includes, further comprising at least two antennas coupled to the transceiver circuit and configured to receive signals from the eNB.

Example 19 is an apparatus for an evolved Node B (eNB) base station having single-user multiple input/multiple output (SU-MIMO) operability, the apparatus including a transceiver circuit and Processing circuitry configured to: control the transceiver circuitry to transmit a plurality of discovery signals carried via the corresponding directional beam, each directional beam having a different angular direction; for each of the discovery signals, controlling the transceiver circuitry for transmission Corresponding to the directional information of the directional beam; and controlling the transceiver circuit to receive a report message from the user equipment (UE), the report message identifying a set of candidate beam directions that have been self-directed by the UE according to the selection criteria It is determined that the selection criteria are based on the combination of the measured angular separation of the received signal power and the beam direction for priority weighting for the beam.

In Example 20, the subject matter of Example 19 optionally includes, wherein the processing circuit is further configured to: control the transceiver circuit to transmit spatial multiplex data communication via at least a portion of the set of candidate beam directions for use by the UE via SU-MIMO layer reception.

In Example 21, the subject matter of any one or more of Examples 19 to 20 is selectively included, wherein the processing circuit is further configured to: control the transceiver circuit to transmit the selection criteria to the UE.

In Example 22, the subject matter of any one or more of Examples 19 to 21 selectively includes wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam.

In Example 23, the subject matter of any one or more of Examples 19 to 22 is selectively included, wherein the discovery signal comprises a channel state information (CSI) reference signal.

In Example 24, the subject matter of any one or more of Examples 19 through 23 selectively includes wherein the received signal power is a Reference Signal Received Power (RSRP) measurement.

In Example 25, the subject matter of any one or more of Examples 19 through 24 is selectively included, wherein the directionality information includes an angle indication value.

In Example 26, the subject matter of any one or more of Examples 19 through 25 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 27, the subject matter of any one or more of Examples 19 to 26 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 28, the subject matter of Example 27 selectively includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 29, the subject matter of any one or more of Examples 27 through 28 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 30, the subject matter of any one or more of Examples 27 through 29 is selectively included, wherein the selection criteria for candidate beam selection define a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 31, the subject matter of any one or more of Examples 19 to 30 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the UE to select the first candidate beam direction to match the beam of the reference signal In the direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 32, the subject matter of Example 31 selectively includes, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction having a relative relative to the first candidate beam The beam direction of the direction angle offset, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 33, the subject matter of any one or more of Examples 31 through 32 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

Example 34 is a computer readable medium containing instructions that, when executed on a processing circuit of a User Equipment (UE), cause the UE to: receive from a evolved Node B (eNB) via a corresponding a plurality of search signals carried by the directional beam, the corresponding directional beams having various angular directions; determining received signal power measurement and directional information of the corresponding directional beam of the search signal; determining candidate beam directions from the directional beams according to the selection criterion a set of selection criteria based on signal power measurements and based on the angular separation of the beam directions determined from the directional information for prioritizing the use of the beam; and transmitting the report message to the eNB, the report message identifying a set of candidate beam directions.

In Example 35, the subject matter of Example 34 optionally includes, wherein the instructions are to further cause the UE to: receive at least a portion of the set of candidate beam directions from the evolved Node B (eNB) via the plurality of SU-MIMO layers Space multiplex data communication for transmission.

In Example 36, the subject matter of any one or more of Examples 34 through 35 is selectively included, wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam space.

In Example 37, the subject matter of any one or more of Examples 34 through 36 is selectively included, wherein the discovery signal comprises a channel state information (CSI) reference signal.

In Example 38, the subject matter of any one or more of Examples 34 through 37 is selectively included wherein the received signal power is measured as a Reference Signal Received Power (RSRP) measurement.

In Example 39, the subject matter of any one or more of Examples 34 through 38 is selectively included, wherein the directionality information includes an angle indication value.

In Example 40, the subject matter of any one or more of Examples 34 through 39 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 41, the subject matter of any one or more of Examples 34 through 40 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 42, the subject matter of Example 41 selectively includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 43, the subject matter of any one or more of Examples 41 through 42 is selectively included, wherein selection criteria for candidate beam selection are defined based on an angular orientation of each of the probe signals relative to the reference discovery signal. Exploring the discounted use of the received signal power measurement of the signal.

In Example 44, the subject matter of any one or more of Examples 41 through 43 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 45, the subject matter of any one or more of Examples 41 through 44 is selectively included, wherein the selection criteria for candidate beam selection define a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 46, the subject matter of any one or more of Examples 34 through 45 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the processing circuit to select the first candidate beam direction to match the reference signal In the beam direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 47, the subject matter of Example 46 optionally includes, wherein the selection criteria for candidate beam selection, when applied, cause the processing circuit to further select a second candidate beam direction having a relative candidate relative to the first candidate The beam direction is offset by the beam direction, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 48, the subject matter of any one or more of Examples 46 through 47 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the processing circuit to further select a second candidate beam direction, the second The candidate beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In Example 49, the subject matter of any one or more of Examples 34 through 48 is selectively included, wherein the instructions are to cause the UE to receive selection criteria from an evolved Node B (eNB).

Example 50 is a computer readable medium containing instructions that, when executed on a processing circuit of an evolved Node B (eNB) base station, cause an eNB to perform the following operations: transmitting more via a corresponding directional beam Each of the directional beams has a different angular direction; for each of the search signals, transmits directional information of the corresponding directional beam; and receives a report message from the user equipment (UE), the report message identifies a set of candidate beam directions The candidate beam directions have been determined by the UE from among the directional beams according to the selection criteria, which are prioritized for use in the beam based on the combination of the measured angular separation of the received signal power and the beam direction.

In Example 51, the subject matter of Example 50 optionally includes, wherein the instructions are to cause the eNB to further: transmit spatial multiplex data communication via at least a portion of the set of candidate beam directions for use by the UE via the plurality of SU- MIMO layer reception.

In Example 52, the subject matter of any one or more of Examples 50 through 51 is selectively included, wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam.

In Example 53, the subject matter of any one or more of Examples 50 through 52 is selectively included, wherein the discovery signal includes a channel state information (CSI) reference signal.

In Example 54, the subject matter of any one or more of Examples 50 through 53 is selectively included, wherein the received signal power is a Reference Signal Received Power (RSRP) measurement.

In Example 55, the subject matter of any one or more of Examples 50 through 54 is selectively included, wherein the directionality information includes an angle indication value.

In Example 56, the subject matter of any one or more of Examples 50 through 55 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 57, the subject matter of any one or more of Examples 50 through 56 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 58, the subject matter of Example 57 selectively includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 59, the subject matter of any one or more of Examples 57 through 58 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 60, the subject matter of any one or more of Examples 57 through 59 is selectively included, wherein the selection criteria for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 61, the subject matter of Example 60 selectively includes, wherein the selection criteria for candidate beam selection, when applied, causes the UE to select a first candidate beam direction to match a beam direction of the reference signal, the reference signal being received in the exploration The maximum signal power measurement is among the clusters of signals.

In Example 62, the subject matter of Example 61 selectively includes, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction having a relative relative to the first candidate beam The beam direction of the direction angle offset, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 63, the subject matter of any one or more of Examples 61 through 62 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In example 64, the subject matter of any one or more of instances 50 through 63 is selectively included, wherein the instructions are to cause the eNB to transmit the selection criteria to the UE.

Example 65 is a method for operating a User Equipment (UE) for Single User Multiple Input/Multiple Output (SU-MIMO) operation, the method being autonomously performed by a UE and comprising: receiving from an evolved Node B (eNB) Corresponding directional beams carried by the corresponding directional beam have various angular directions; determining received signal power measurement and directional information of the corresponding directional beam of the search signal; determining candidates among the directional beams according to the selection criterion a set of beam directions, the selection criteria are based on signal power measurements and the angular spacing of the beam directions determined from the directional information is prioritized for use in the beam; and the report message is transmitted to the eNB, the report message identifying the candidate beam direction set.

In Example 66, the subject matter of Example 65 optionally includes, further comprising: controlling spatial multiplex data communication transmitted via at least a portion of the set of candidate beam directions from the evolved Node B (eNB) via the plurality of SU-MIMO layers .

In Example 67, the subject matter of any one or more of Examples 65 through 66 selectively includes wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam space.

In Example 68, the subject matter of any one or more of Examples 65 through 67 is selectively included, wherein the discovery signal comprises a channel state information (CSI) reference signal.

In Example 69, the subject matter of any one or more of Examples 65 through 68 is selectively included wherein the received signal power is measured as a Reference Signal Received Power (RSRP) measurement.

In Example 70, the subject matter of any one or more of Examples 65 through 69 is selectively included, wherein the directionality information includes an angle indication value.

In Example 71, the subject matter of any one or more of Examples 65 through 70 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 72, the subject matter of any one or more of Examples 65 through 71 is selectively included, wherein selection criteria for candidate beam selection are defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 73, the subject matter of Example 72 selectively includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 74, the subject matter of any one or more of Examples 72 through 73 is selectively included, wherein selection criteria for candidate beam selection are defined based on an angular orientation of each of the probe signals relative to the reference discovery signal. Exploring the discounted use of the received signal power measurement of the signal.

In Example 75, the subject matter of any one or more of Examples 72 through 74 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 76, the subject matter of any one or more of Examples 72 through 75 is selectively included, wherein the selection criteria for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 77, the subject matter of any one or more of Examples 65 to 76 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the UE to select the first candidate beam direction to match the beam of the reference signal In the direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 78, the subject matter of Example 77 selectively includes, wherein the selection criteria for candidate beam selection, when applied, cause the UE to further select a second candidate beam direction having a relative relative to the first candidate beam The beam direction of the direction angle offset, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 79, the subject matter of any one or more of Examples 77 to 78 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In Example 80, the subject matter of any one or more of Examples 65 to 79, optionally, further comprising: receiving a selection criterion from an evolved Node B (eNB).

Example 81 is a method for operating an evolved Node B (eNB) base station for Single User Multiple Input/Multiple Output (SU-MIMO) operation, the method being autonomously performed by an eNB and comprising: transmitting via a corresponding directional beam a plurality of discovery signals, each directional beam having a different angular direction; transmitting directionality information of the corresponding directional beam for each of the discovery signals; and receiving a report message from the user equipment (UE), the report message identifying the candidate beam direction A set of candidate beam directions has been determined by the UE from among the directional beams according to a selection criterion that is prioritized for use in the beam based on a combination of the measured angular power of the received signal power and the beam direction.

In Example 82, the subject matter of Example 81 optionally includes, further comprising: transmitting spatial multiplex data communication via at least a portion of the set of candidate beam directions for reception by the UE via the plurality of SU-MIMO layers.

In Example 83, the subject matter of any one or more of Examples 81 through 82 selectively includes, wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam.

In Example 84, the subject matter of any one or more of Examples 81 through 83 is selectively included, wherein the discovery signal comprises a channel state information (CSI) reference signal.

In Example 85, the subject matter of any one or more of Examples 81 through 84 is selectively included wherein the received signal power is a Reference Signal Received Power (RSRP) measurement.

In Example 86, the subject matter of any one or more of Examples 81 through 85 is selectively included, wherein the directionality information includes an angle indication value.

In Example 87, the subject matter of any one or more of Examples 81 through 86 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 88, the subject matter of any one or more of Examples 81 through 87 is selectively included, wherein selection criteria for candidate beam selection are defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In Example 89, the subject matter of Example 88 optionally includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 90, the subject matter of any one or more of Examples 88 through 89 is optionally included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In Example 91, the subject matter of any one or more of Examples 88 through 90 is selectively included, wherein a selection criterion for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In Example 92, the subject matter of any one or more of Examples 81 through 91 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to select the first candidate beam direction to match the beam of the reference signal In the direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 93, the subject matter of Example 92 selectively includes, wherein the selection criteria for candidate beam selection, when applied, cause the UE to further select a second candidate beam direction having a relative relative to the first candidate beam The beam direction of the direction angle offset, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In Example 94, the subject matter of any one or more of Examples 92 through 93 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In Example 95, the subject matter of any one or more of Examples 81 through 94 is selectively included, further comprising: transmitting a selection criterion to the UE.

Example 96 is a User Equipment (UE) for Single User Multiple Input/Multiple Output (SU-MIMO) operation, the UE comprising: a receiving component for receiving from a evolved Node B (eNB) to carry via a corresponding directional beam a plurality of search signals, the corresponding directional beams having various angular directions; a determining component for determining received signal power measurements and directional information of the corresponding directional beam of the search signal; and a determining component for selecting the selection criteria Determining a set of candidate beam directions among the directional beams, the selection criteria are based on signal power measurements and the angular spacing of the beam directions determined from the directional information is used for priority weighting in the beam; and a transmission component for reporting The message is transmitted to the eNB, and the report message identifies a set of candidate beam directions.

In Example 97, the subject matter of Example 96 optionally includes, further comprising: a control component for controlling transmission from at least a portion of the set of candidate beam directions from the evolved Node B (eNB) via the plurality of SU-MIMO layers Spatial multiplex data communication.

In Example 98, the subject matter of any one or more of Examples 96 through 97 selectively includes wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam space.

In Example 99, the subject matter of any one or more of Examples 96 through 98 is selectively included, wherein the discovery signal includes a channel state information (CSI) reference signal.

In example 100, the subject matter of any one or more of Examples 96 through 99 is selectively included wherein the received signal power is measured as a Reference Signal Received Power (RSRP) measurement.

In Example 101, the subject matter of any one or more of Examples 96 through 100 is selectively included, wherein the directionality information includes an angle indication value.

In example 102, the subject matter of any one or more of instances 96 through 101 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In Example 103, the subject matter of any one or more of Examples 96 through 102 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the discovery signals relative to the primary discovery signal. A discounted use of the received signal power measurement of the signal is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In example 104, the subject matter of example 103 selectively includes, wherein selection criteria for candidate beam selection are based on an angular orientation of each of the probe signals relative to the primary probe signal to define a received signal power measurement for each of the probe signals For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In example 105, the subject matter of any one or more of instances 103 through 104 is selectively included, wherein a selection criterion for candidate beam selection is defined based on an angular orientation of each of the exploration signals relative to the reference discovery signal. A discount is used to estimate the received signal power of the signal.

In Example 106, the subject matter of any one or more of Examples 103 through 105 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In example 107, the subject matter of any one or more of instances 103 through 106 is selectively included, wherein a selection criterion for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In example 108, the subject matter of any one or more of instances 96 through 107 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the UE to select the first candidate beam direction to match the beam of the reference signal In the direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In example 109, the subject matter of the instance 108 selectively includes, wherein the selection criteria for candidate beam selection, when applied, cause the UE to further select a second candidate beam direction having a relative to the first candidate beam The beam direction of the direction angle offset, wherein the SU-MIMO communication along the first beam direction and the SU-MIMO communication along the second beam direction do not interfere with each other.

In example 110, the subject matter of any one or more of instances 108 through 109 is selectively included, wherein a selection criterion for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In example 111, the subject matter of any one or more of instances 96 through 110 is selectively included, further comprising: a receiving component for receiving a selection criterion from an evolved Node B (eNB).

Example 112 is an evolved Node B (eNB) base station for single-user multiple input/multiple output (SU-MIMO) operation, the eNB comprising: a transmission component for transmitting a plurality of discovery signals carried via corresponding directional beams Each directional beam has a different angular direction; a transmission member for transmitting directional information for a corresponding directional beam for each of the search signals; and a receiving means for receiving a report message from the user equipment (UE) The report message identifies a set of candidate beam directions that have been determined by the UE from the directional beam according to a selection criterion that is prioritized based on the combination of the measured angular power of the received signal power and the beam direction. Weighting is used for the beam.

In Example 113, the subject matter of the example 112 optionally includes, further comprising: a transmission component for transmitting spatial multiplex data communication via at least a portion of the set of candidate beam directions for use by the UE via the plurality of SU-MIMO Layer reception.

In Example 114, the subject matter of any one or more of Examples 112 through 113 selectively includes, wherein each of the directional beams of the plurality of discovery signals overlaps with at least one other directional beam.

In example 115, the subject matter of any one or more of instances 112 through 114 is selectively included, wherein the discovery signal includes a channel state information (CSI) reference signal.

In example 116, the subject matter of any one or more of instances 112 through 115 is selectively included wherein the received signal power is a reference signal received power (RSRP) measurement.

In Example 117, the subject matter of any one or more of Examples 112 through 116 is selectively included, wherein the directionality information includes an angle indication value.

In example 118, the subject matter of any one or more of instances 112 through 117 is selectively included, wherein the directionality information includes an indicator value associated with the direction.

In example 119, the subject matter of any one or more of instances 112 through 118 is selectively included, wherein selection criteria for candidate beam selection are based on an angular orientation of each of the probe signals relative to the primary discovery signal to define a discount to An application of a received signal power measurement for each of the signals is explored, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals.

In example 120, the subject matter of example 119 optionally includes wherein the selection criteria for candidate beam selection defines a received signal power measurement for each of the probe signals based on an angular orientation of each of the probe signals relative to the primary probe signal. For discounted use, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals.

In Example 121, the subject matter of any one or more of Examples 119 through 120 is selectively included, wherein the discount is defined as gradually decreasing with increasing angular separation relative to the primary discovery signal.

In example 122, the subject matter of any one or more of instances 119 through 121 is selectively included, wherein a selection criterion for candidate beam selection defines a limit on the amount of N candidate beams to be reported, and wherein the message is reported N candidate beams having a maximum signal power measurement after application of each of the discount to discovery signals are included.

In example 123, the subject matter of any one or more of instances 112 through 122 is selectively included, wherein the selection criteria for candidate beam selection, when applied, cause the UE to select the first candidate beam direction to match the beam of the reference signal In the direction, the reference signal has a maximum signal power measurement among the clusters of received discovery signals.

In example 124, the subject matter of any one or more of instances 108 through 123 is selectively included, wherein the selection criteria for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset with respect to the first candidate beam direction, wherein SU-MIMO traffic along the first beam direction and SU-MIMO traffic along the second beam direction do not interfere with each other.

In example 125, the subject matter of any one or more of instances 123 through 124 is selectively included, wherein a selection criterion for candidate beam selection, when applied, causes the UE to further select a second candidate beam direction, the second candidate The beam direction has a beam direction that is angularly offset from the first candidate beam direction according to a predefined offset criterion.

In example 126, the subject matter of any one or more of instances 112 through 125 is selectively included, further comprising: a transmission component for transmitting selection criteria to the UE.

The above detailed description includes references to the accompanying drawings, which are a The drawings show diagrammatic specific embodiments that may be practiced. These embodiments are also referred to herein as "examples." Such examples may include elements other than those shown or described. However, it is also contemplated to include examples of the elements shown or described. In addition, it is also contemplated that the elements (or one or more aspects thereof) shown or described may be used with respect to a particular example (or one or more aspects thereof) or with respect to other examples shown or described herein (or An example of any combination or permutation of one or more of its aspects.

All of the applications, patents and patent documents referred to in this specification are hereby incorporated by reference in their entirety herein in their entirety in their entirety herein In the event of inconsistencies between this document and such documents incorporated by reference, the use of incorporated references is in addition to the use of this document; the non-concilable inconsistencies used in the control of this document .

In this document, the use of the words "a" or "an" (such as is common in the patent document) to include one or more than one, or any other instance or usage of "at least one" or "one or more" . In this document, the word "or" is used to mean non-exclusive or such that "A or B" includes "A and not B", "B instead of A" and "A and B" unless otherwise indicated. The words "including" and "in" are used as the plain English equivalents of the words "including" and "in". In addition, in the scope of the following claims, the words "including" and "comprising" are open-ended, that is, systems and devices that include elements other than those listed after the term in the claim. Objects or processing are still considered to fall within the scope of the request. In addition, in the following claims, the terms "first", "second" and "third" are used merely as a mark and are not intended to imply a numerical order for the item.

The above description is intended to be illustrative, and not restrictive. For example, the examples described above (or one or more aspects thereof) can be used in combination with other examples. Other embodiments may be used by one of ordinary skill in the art, after reviewing the above description. The Abstract is provided to allow the reader to quickly ascertain the nature of the disclosure. The abstract will not be submitted without the scope or meaning of the scope of the patent application. Further, in the above Detailed Description, various features may be grouped together to rationalize the invention. However, the scope of the patent application may not be construed as a limitation of the features disclosed herein, as the embodiments may highlight a subset of the features. Furthermore, embodiments may include fewer features than those disclosed in the particular examples. The scope of the following claims is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the The scope of the disclosed subject matter should be determined by reference to the scope of the appended claims and the scope of the claims.

101...Radio Access Network (RAN)
102...user equipment (UE)
104...Evolved Node B (eNB)
115...S1 interface
120...core network
122...Action Management Entity (MME)
124...service gateway (service GW)
126... packet data network gateway (PDN GW)
200...UE
202...application circuit
204...base frequency circuit
204a... second generation (2G) baseband processor
204b... third generation (3G) baseband processor
204c... fourth generation (4G) baseband processor
204d...other baseband processors
204e... central processing unit (CPU)
204f... audio digital signal processor (DSP)
206...radio frequency (RF) circuit
206a...mixer circuit
206b...amplifier circuit
206c...filter circuit
206d... synthesizer circuit
208... front end module (FEM) circuit
210, 301... antenna
300...eNB
302... physical layer circuit
304...Media Access Control Layer (MAC) circuit
305... transceiver
306...processing circuit
308...memory
310...interface
400, 450, 500... situation
405-420, 455, 460, 465, 470, 475, 480, 514A, 514B, 514C, 516A...beams
502...beam exploration signal beam
504, 506... transmission exploration beam cluster
504', 506'... received beam cluster
508...Report threshold
514, 516... corrected received beam cluster
600, 620, 630... scaling function
602, 632... non-scaling part
604, 624... discount section
604A, 604B, 604C, 624A, 624B, 624C... function distribution
606... non-proportional zoom around
Around 626, 636...
630...BRPMC function
634...beam missing part
702, 704, 708, 710-722, 802-810... operation
706...decision

In the drawings, which are not necessarily to scale, the The same numbers with different letter suffixes may represent different instances of similar components. Some embodiments are illustrated by way of example and not limitation in the accompanying drawings.

1 is a functional diagram of a 3GPP network in accordance with some embodiments.

2 is a block diagram of a User Equipment (UE) in accordance with some embodiments.

3 is a block diagram of an evolved Node B (eNB) in accordance with some embodiments.

FIG. 4 illustrates an example of multi-beam transmission in accordance with some embodiments.

5A, 5B, and 5C are diagrams illustrating beam directivity of multi-beam operation in more detail, in accordance with some embodiments.

6A-6C are graphs depicting beam received power measurement correction (BRPMC) functions in accordance with various embodiments.

7 is a flow diagram illustrating an exemplary process of operating a UE to identify and report candidate beams for single-user multiple input/multiple output (SU-MIMO) operation, in accordance with some embodiments.

8 is a flow diagram illustrating an exemplary process for operating an eNB to assemble a UE to identify and report candidate beams for single-user multiple input/multiple output (SU-MIMO) operation, in accordance with some embodiments.

702, 704, 708, 710~722‧‧‧ operations

706‧‧‧ decision

Claims (30)

A device for a User Equipment (UE) having single-user multiple input/multiple output (SU-MIMO) operability, the device comprising a transceiver circuit and a processing circuit, the processing circuit Controlling, by the transceiver circuit, a plurality of discovery signals carried via a corresponding directional beam having various angular directions from an evolved Node B (eNB); determining a received signal power of the corresponding directional beams of the search signals Measure and directional information; determining a set of candidate beam directions from the directional beams according to a selection criterion, the selection criteria are based on the signal power measurements and based on the angular spacing of the beam directions determined from the directional information Priority weighting is used for the beam; and the transceiver circuit is controlled to transmit a report message to the eNB, the report message identifying the set of candidate beam directions. The apparatus of claim 1, wherein the processing circuit is further configured to: control the transceiver circuit to receive, from the eNB, a plurality of spaces transmitted via the plurality of SU-MIMO layers via at least a portion of the set of candidate beam directions Work data communication. The apparatus of claim 1, wherein the selection criteria for candidate beam selection define a received signal power measurement for each of the search signals based on an angular orientation of each of the search signals relative to a primary search signal. In one discount, the primary discovery signal has a maximum signal power measurement among the plurality of discovery signals. The apparatus of claim 3, wherein the selection criteria for candidate beam selection define a received signal power measurement for each of the search signals based on an angular orientation of each of the search signals relative to a primary search signal One of the discount uses, the primary discovery signal has a maximum signal power measurement among the clusters of received discovery signals. The apparatus of claim 3, wherein the selection criteria for candidate beam selection define a received signal power measurement for each of the search signals based on an angular orientation of each of the search signals relative to a reference search signal One discount is used. The device of claim 3, wherein the discount is defined as gradually decreasing as the angular separation from the primary discovery signal increases. The device of claim 1, wherein the processing circuit comprises a baseband processor for decoding the plurality of received discovery signals. The apparatus of claim 7, further comprising at least two antennas coupled to the transceiver circuit and configured to receive signals from the eNB. An apparatus for an evolved Node B (eNB) base station having single-user multiple input/multiple output (SU-MIMO) operability, the apparatus including a transceiver circuit and a processing circuit The processing circuit is configured to: control the transceiver circuit to transmit a plurality of discovery signals carried via the corresponding directional beam, each directional beam having a different angular direction; for each of the discovery signals, controlling the transceiver circuit Transmitting the directionality information of the corresponding directional beam; and controlling the transceiver circuit to receive a report message from a user equipment (UE), the report message identifying a set of candidate beam directions, the candidate beam directions have been used by the UE The selection criteria are determined from among the directional beams, which are prioritized for use in the beam based on a combination of the measured angular separation of the received signal power and the beam direction. The apparatus of claim 9, wherein the processing circuit is further configured to: control the transceiver circuit to receive, by the UE, via a plurality of SU-MIMO layers via at least a portion of the set of candidate beam directions for transmitting spatial multiplexing data communication . The apparatus of claim 9, wherein the processing circuit is further configured to: control the transceiver circuit to transmit the selection criteria to a UE. The device of claim 9, wherein the directional information includes an angle indication value. The device of claim 9, wherein the directional information includes an indicator value associated with a direction. The apparatus of claim 9, wherein the selection criteria for candidate beam selection, when in use, cause the UE to select a first candidate beam direction to match a beam direction of a reference signal, the reference signal is at the received discovery signal One of the clusters has a maximum signal power measurement. The apparatus of claim 14, wherein the selection criteria for candidate beam selection, when in use, cause the UE to further select a second candidate beam direction having an angle with the first candidate beam direction An offset beam direction in which SU-MIMO traffic along the first beam direction and SU-MIMO traffic along the second beam direction do not interfere with each other. The apparatus of claim 14, wherein the selection criteria for candidate beam selection, when in use, cause the UE to further select a second candidate beam direction having a predetermined offset criterion and the first A beam direction in which the candidate beam direction is angularly offset. A computer readable medium containing instructions that, when executed on a processing circuit of a User Equipment (UE), cause the UE to receive from a corresponding evolved Node B (eNB) via a corresponding directional beam having various angular directions a plurality of discovery signals; determining received signal power measurements and directional information of the corresponding directional beams of the search signals; determining a set of candidate beam directions from the directional beams according to a selection criterion, the selection The criteria are based on the signal power measurements and based on the angular separation of the beam directions determined from the directional information, the priority weighting is used for the beam; and the reporting message is transmitted to the eNB, the reporting message identifying the set of candidate beam directions. The computer readable medium of claim 17, wherein the received signal power is measured as a reference signal received power (RSRP) measurement. The computer readable medium of claim 17, wherein the selection criteria for candidate beam selection define the received for each of the search signals based on an angular orientation of each of the search signals relative to a primary search signal One of the signal power measurements is used for discounting, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals. The computer readable medium of claim 17, wherein the selection criteria for candidate beam selection, when in use, cause the processing circuit to select a first candidate beam direction to match a beam direction of a reference signal, the reference signal being There is a maximum signal power measurement among the clusters of received discovery signals. The computer readable medium of claim 20, wherein the selection criteria for candidate beam selection, when in use, cause the processing circuit to further select a second candidate beam direction, the second candidate beam direction having the first candidate The beam direction is an angularly offset beam direction, wherein SU-MIMO traffic along the first beam direction and SU-MIMO traffic along the second beam direction do not interfere with each other. The computer readable medium of claim 20, wherein the selection criteria for candidate beam selection, when in use, cause the processing circuit to further select a second candidate beam direction having a predetermined offset A beam direction in which the criterion is angularly offset from the first candidate beam direction. The computer readable medium of claim 17, wherein the instructions are to cause the UE to receive the selection criteria from an evolved Node B (eNB). A computer readable medium containing instructions for causing the eNB to transmit a plurality of discovery signals carried via a corresponding directional beam, each directional beam, when executed on a processing circuit of an evolved Node B (eNB) base station Having a different angular direction; transmitting, for each of the search signals, directional information of the corresponding directional beam; and receiving a report message from a user equipment (UE), the report message identifying a set of candidate beam directions, the candidate The beam direction has been determined by the UE from among the directional beams according to a selection criterion that is prioritized for use in the beam based on a combination of one of the measured angular distances of the received signal power and the beam direction. The computer readable medium of claim 24, wherein the instructions are to cause the eNB to: transmit spatial multiplex data communication via at least a portion of the set of candidate beam directions for reception by the UE via the plurality of SU-MIMO layers. The computer readable medium of claim 24, wherein the selection criteria for candidate beam selection define a received signal for each of the search signals based on an angular orientation of each of the search signals relative to a primary search signal One of the power measurements is used for discounting, the primary discovery signal having a maximum signal power measurement among the plurality of discovery signals. The computer readable medium of claim 26, wherein the selection criteria for candidate beam selection are based on an angular orientation of each of the search signals relative to a primary search signal to define a received signal power for each of the search signals One of the measurements is used for discounting, the primary discovery signal having a maximum signal power measurement among the clusters of received discovery signals. The computer readable medium of claim 26, wherein the discount is defined as gradually decreasing as the angular separation from the primary discovery signal increases. The computer readable medium of claim 26, wherein the selection criteria for candidate beam selection define a limit on the number of N candidate beams to report, and wherein the report message is included in the discount for each of the searches The signal has N candidate beams measured for maximum signal power. The computer readable medium of claim 24, wherein the instructions are to cause the eNB to transmit the selection criteria to a UE.