WO2016195556A1 - Réalisation distribuée de formation de faisceau - Google Patents

Réalisation distribuée de formation de faisceau Download PDF

Info

Publication number
WO2016195556A1
WO2016195556A1 PCT/SE2015/050646 SE2015050646W WO2016195556A1 WO 2016195556 A1 WO2016195556 A1 WO 2016195556A1 SE 2015050646 W SE2015050646 W SE 2015050646W WO 2016195556 A1 WO2016195556 A1 WO 2016195556A1
Authority
WO
WIPO (PCT)
Prior art keywords
spb
information
antenna elements
beamforming matrix
spbs
Prior art date
Application number
PCT/SE2015/050646
Other languages
English (en)
Inventor
Jacob ÖSTERLING
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/SE2015/050646 priority Critical patent/WO2016195556A1/fr
Publication of WO2016195556A1 publication Critical patent/WO2016195556A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Definitions

  • the invention relates to beam forming in wireless communication systems, and in particular to a beam former architecture for efficient handling of information.
  • FIG. 1 shows a network node 101 performing beam forming using an antenna arrangement comprising 8x8 antenna elements.
  • the network node 101 provides a set of wireless devices 101 -103 with radio coverage by means of a set of beams 105-107.
  • a transceiver such as a Radio Base Station (RBS), typically comprises Radio
  • the antenna elements are comprised in the RE, and received data is conveyed to the REC.
  • a typical RBS comprises two main parts - the Radio Equipment Controller, REC, and the Radio Equipment, RE, as illustrated in figure 2.
  • REC Radio Equipment Controller
  • RE Radio Equipment
  • CPRI Common Public Radio Interface
  • the functional allocation of the RBS described here is somewhat different as compared to what is described in the CPRI specification. Some differences are that: ⁇
  • the REC does not send antenna streams to the RE, but rather virtual antenna streams, e.g. MIMO streams.
  • the REC can directly address the RE antennas, but in this beam forming RBS, the RE includes the functionality of mapping a virtual antenna stream to a set of physical antennas in order to generate a desired beam form.
  • this is called virtual antenna ports, and may be regarded as that the RE presents a set of virtual antenna patterns, or beams, of which the REC can chose from.
  • the REC thus sends the RE a data stream and information on what virtual antenna to output it on. This can be different for different simultaneous UEs, and different for UL and DL.
  • the Fast Fourier Transform, FFT, and Inverse Fast Fourier Transform, IFFT, functions are moved to the RE.
  • the beam forming functionality is added to the RE.
  • the REC-RE interface is typically no longer a streaming interface, but packet oriented, sending the (frequency domain) samples to the RE symbol by symbol. This allows for quick and flexible allocation of resources on the interface to different users. This is not a necessity, but at least the beam forming information is packet based.
  • the REC still maintain the knowledge about the mobile users, such as data channel, beam direction, etc, and the RE acts solely on commands from the REC.
  • Analog beam forming does not support multiple simultaneous users and is not relevant for outdoor cellular access.
  • Central digital beam forming is a very
  • the solution described herein relates to an architecture within a beam forming transmitter and/or beam forming receiver based on a daisy chain of beam forming units, each contributing to or interpreting IQ samples being cascaded.
  • DFE Digital Front End
  • beam forming is distributed to a plurality of units connected in sequence.
  • the solution involves subdividing both UL and DL beam forming into separate local operations, where a daisy chain of local units, denoted Sequential Partial Beamformers (SPBs) herein, can impose and/or derive their contribution to the beam forming.
  • SPBs Sequential Partial Beamformers
  • An advantage of the solution described herein is that it enables a simpler routing on a circuit board of a central DFE or REC, e.g. since the solution does not require a "star"-formation (cf. figure 3) of interfaces which depends on the number of local units.
  • the solution is applicable both for ADC/DAC (Analog to Digital
  • modules/ASICs may be used for creating antenna arrays of different sizes. Further, the solution is fault tolerant, especially if no central DFE is used, but multiple daisy chains are presented to the REC.
  • an SPB is provided, which is operable to be connected in sequence with two other SPBs in a chain of SPBs.
  • the SPB is configured to obtain information from a first adjacent SPB, said information being associated with a beamforming matrix.
  • the SPB is further configured to perform an operation on the received information, based on a predefined part of the beamforming matrix; and further to provide information related to the obtained information to a second adjacent SPB.
  • a method is provided, which is to be performed by an SPB operable to be connected in sequence with two other SPBs in a chain of SPBs.
  • the method comprises obtaining information from a first adjacent SPB, said information being associated with a beamforming matrix.
  • the method further comprises performing an operation on the received information, based on a predefined part of the beamforming matrix, and providing information related to the obtained information to a second adjacent SPB.
  • a network node comprising a plurality of SPBs according to the first aspect, the SPBs being connected in sequence.
  • a computer program which comprises instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to the second aspect.
  • a carrier is provided, containing the computer program of the fourth aspect, wherein the carrier is one of an electronic signal, optical signal, radio signal, or computer readable storage medium.
  • Figure 1 is a schematic diagram illustrating beam forming.
  • Figure 2 is a block chart illustrating a network node comprising radio equipment and a radio equipment controller.
  • Figure 3 is a block chart illustrating a beam forming architecture.
  • Figure 4 is a block chart illustrating a beam forming architecture according to an exemplifying embodiment.
  • Figures 5-6 are flow charts illustrating methods performed by a Sequential Partial Beamformer, SPB, according to exemplifying embodiments.
  • Figure 7a illustrates a chain of SPBs according to an exemplifying embodiment.
  • Figure 7b illustrates a network node comprising a chain of SPBs according to an exemplifying embodiment.
  • Figure 8 illustrates an SPB in a downlink scenario according to an exemplifying embodiment.
  • Figure 9 illustrates an SPB in an uplink scenario according to an exemplifying embodiment.
  • Figures 10a-c are schematic block diagrams illustrating different implementations of an SPB according to exemplifying embodiments.
  • FIG. 3 shows a prior art realization of an antenna, comprising 64 elements.
  • time domain IQ signals are sent, in case of uplink communication, from the antenna elements into a central DFE. It is also in the central DFE that the mapping from virtual antenna streams, e.g. MIMO streams to physical antenna streams is made in case of downlink communication, and the mapping from physical antenna streams to MIMO streams is made in case of uplink communication.
  • the time domain IQ signals can either be on a format for the ADC/DAC interfaces, or, in cases where a 2-level DFE is used, on the format of channel filtered IQ streams, such as legacy "CPRI".
  • the central DFE In case of using the format of channel filtered IQ streams, the central DFE would require one l OGbps interface per antenna element, i.e. 64 10Gbps interfaces in the example with 64 antenna elements illustrated in figure 3. In case of raw ADC/DAC interfaces, the central DFE would require 2-10 times this amount of capacity.
  • the "x10" case is valid for downlink communication, (Tx), if digital predistortion
  • the solution described herein deals with problems of the prior art solutions, such as the problems related to that many interfaces, or connections, converge, i.e. go, to one location or position, e.g. on a circuit board, as illustrated e.g. in figure 3 (left part).
  • One of these problems may be the actual layout on the board.
  • the layout on the board may also be referred to as routing herein.
  • Another problem with many interfaces or connections leading to one unit, such as a central DFE is processing of all the data that accumulates there and needs to be handled by the unit.
  • a further problem is that the realization of the unit, such as a central DFE, is dependent of the number of antenna elements used in a particular antenna set-up.
  • a chain of small local units is used instead of the "star" -formation of interfaces as mention above.
  • the small local units can be placed close to the antennas, and be configured to have a limited need of interfaces.
  • a central unit can be deployed e.g. to hide the internal structure of the RE to the REC, and possibly to combine a plurality of different chains of local units, e.g. for redundancy.
  • DFEs Digital Front Ends.
  • DFEs local, and central, units associated with embodiments of the solution described herein, even when referred to as DFEs, should not be perceived as limited to what has previously been referred to as DFEs in the art, e.g. in terms of being limited to standard interfaces.
  • the local units will be referred to as Sequential Partial Beamformers( SPBs) herein.
  • no local unit, SPB needs to have more than a few, e.g. 4 virtual antenna streams coming in and the same amount of virtual antenna streams, e.g. 4, going out, i.e. a total of 8 x 1 0Gbps in the example with 4 in and 4 out.
  • a central unit (DFE) could have, in an uplink direction, N x 4 virtual antenna streams coming in, where N is the number of independent chains of SPBs, and 4 virtual antenna streams going out, e.g. towards a REC.
  • the matrix E corresponds to antenna elements ei;
  • the matrix A is the downlink beamforming matrix comprising complex coefficients ai,j, and the matrix S
  • Each column in the beam forming matrix A corresponds to how a virtual antenna should be formed, i.e. the phase and the amplitude of a virtual antenna stream s, on that antenna element e,.
  • the data to transmit on the antenna element e is the sum of the contribution from each virtual antenna stream s, use of that antenna element.
  • each SPB (local DFE) is given, or assigned, its portion of the beam forming matrix.
  • the SPB which feeds antenna elements 5,6,7 and 8 will be assigned the 5:th to 8:th row of the beam forming matrix, which could be expressed as, in analogy with the matrix notation above:
  • Uplink, UL, beam forming for 64 antenna elements and 4 virtual antenna streams can be expressed in the same way.
  • R corresponds to the received virtual antenna streams ri
  • B is the UL beamforming matrix
  • E corresponds to the receive (Rx) antenna elements ei.
  • the SPB responsible for antenna elements 5-8 is given, or assigned, the 5:th to 8:th column of the UL beamforming matrix B.
  • the SPBk will generate its contribution, BkEk, and add the contribution to the virtual antenna stream samples generated so far, i.e. to Rk_in.
  • the SPBs in a chain will perform a complete UL beam forming according to the UL beam forming matrix B, by each adding its part in a serial manner. Previously, this beam forming was performed in a central DFE.
  • the distribution of matrices to the different local DFEs may be done either directly by a control instance, such as a REC, or by a function in a central DFE, thus hiding the internals of the RE to the REC or corresponding.
  • this unit may e.g. convert a virtual beam, or angle, into a set of beam forming matrices, e.g. by presenting 1024 fixed beams to the REC, each mapping to a set of beam forming matrices. That is, the central DFE may convert, transform or map a more abstract request or concept, such as a virtual beam, into something which is more suitable for applying to antenna elements.
  • embodiments without use of a central DFE may be a preferred solution, and will be described further below.
  • a beam forming matrix is applied to the samples for a special UE.
  • a UE could be associated with multiple streams, and thus with multiple beam forming matrices. Different UEs (and different streams) have different matrices.
  • the size of a beam forming matrix depends on the number of virtual antennas used, which is typically the number of virtual antenna streams or number of UL streams the REC wants to process (e.g. to do interference cancellation).
  • the solution described herein with cascaded SPBs, or cascaded "local DFEs”, reduces the routing problem, or information handling problem, around a central DFE in a RE.
  • the solution enables reducing the routing to a minimum, and simplifies circuit design.
  • the design of a central DFE will be independent of the number of local DFEs connected to it, which is a great advantage.
  • the same design of such a central DFE could be used for different products, e.g. in a configuration with 16 antenna elements or a configuration with 256 antenna elements.
  • central DFE is optional, as the interface from a central DFE can be forwarded to a REC, or corresponding. This is especially advantageous in at least two cases:
  • the central DFE can be omitted.
  • the local DFE cascade aka SPB cascade
  • the local DFE cascade can be split up into two separate chains, each interfacing the REC.
  • the cascade (chain) may be connected to the REC in both ends.
  • the REC then needs twice as many interfaces as compared to when only being connected to one end of the chain.
  • the SPB is operable to be connected in sequence with other SPBs in a chain of SPBs, and the SPB is further associated with set of antenna elements.
  • the antenna elements are integrated with the SPB, but there may be embodiments where the SPB instead is configured for being connected to the set of antenna elements.
  • the SPB is further operable to be comprised in a network node in a wireless communication network supporting beam forming.
  • the SPB could be comprised in a radio base station or other type of radio access, RA, node, e.g.
  • the method comprises obtaining 501 information from a first adjacent SPB, where said information is associated with a beamforming matrix. As previously mentioned, and which will be further described below, this information is different depending on whether it is related to reception or transmission on the antenna elements, i.e. to UL or DL communication. The information will also be obtained from different ones of the adjacent SPBs depending on whether it relates to UL or DL communication.
  • the method further comprises performing 502 an operation on at least part of the obtained information, based on a predefined part or portion of the beamforming matrix. The type of operation also depends on whether the information is related to UL or DL communication, which will be described in more detail further below.
  • the method further comprises providing 503 information related to the obtained information to a second adjacent SPB.
  • the information related to the obtained information is different depending on whether the obtained information is related to UL or DL communication, as well as that the information will be provided to different ones of the adjacent SPBs depending on whether it relates to UL or DL
  • the part of the beamforming matrix used when performing the operation may be assumed to be known to the SPB.
  • the SPB may e.g. have been configured in a way that enables it to derive the part of a provided beamforming matrix which is relevant for the antenna elements associated with, e.g. comprised in the SPB.
  • the SPB may be configured for being able to derive relevant part of a beamforming matrix based on a provided direction or angle.
  • the part of the beam forming matrix is related to the positions of the antenna elements of the SPB in an antenna matrix composed of antenna elements of a plurality of SPBs.
  • the information related to the beamforming matrix will be provided by a control entity, such as a REC, and/or central DFE, or alternatively be provided by an SPB in the chain, e.g. the first SPB in the chain, provided with extra functionality for e.g. deriving a beamforming matrix based on a direction or angle provided e.g. from a REC.
  • instructions may be received from a control entity, e.g. at set-up, indicating which part of a beamforming matrix that is related to the set of antenna elements comprised in the
  • Figure 6 illustrates an exemplifying embodiment of the invention in more detail.
  • the actions performed by the SPB depend on whether it is a question of reception or transmission on the antenna elements, i.e. a question of UL or DL communication.
  • actions 601 -604 are directed to UL communication
  • actions 605-608 are directed to DL communication.
  • the terms UL and DL here relates to that the SPB is assumed to be located in a radio access node, such as a radio base station, which communicates via radio with wireless devices.
  • the method illustrated in figure 6 comprises, in case of UL communication, obtaining 601 information related to signals received by at least one other SPB in accordance with an UL beamforming matrix, which here will be denoted B.
  • this obtained information could be referred to as Rk in, and comprises information received (on antenna elements) by SPBs located further away from a radio equipment controller, REC, or corresponding, in the chain of SPBs, than the SPB performing the method.
  • the obtained information is composed of information that has been received by these SPBs on their respective antenna elements in accordance with their respective parts of the beam forming matrix B.
  • the method further comprises inserting into the obtained information Rk in, typically by means of linear
  • amended information Rk_out is generated by combining 603 BkEk into Rk_in as Rk_in + BkEk, where Bk is the part of the UL beamforming matrix which is relevant for the SPB in question, and Ek is the information received on the antenna elements of the same SPB, and the operations, e.g. BkEk, are matrix operations.
  • the generated amended information Rk_out is then provided 604 to the following adjacent SPB, which is not the same SPB as the one from which the information Rk in was received.
  • the method illustrated in figure 6 comprises obtaining 605 downlink information S from an adjacent SPB, where S corresponds to a number of virtual antenna streams and is associated with a DL beam forming matrix, which here will be denoted A.
  • the method further comprises providing, i.e. forwarding 608 the information S to a following adjacent SPB, which is not the same SPB as the one from which the information S was received.
  • FIG 7a a part of a chain of SPBs is illustrated.
  • the method embodiments above have been described as performed by an SPB with index "k", which in figure 7a would correspond to the SPB 702.
  • an UL and a DL direction have been indicated in order to facilitate the understanding of the solution.
  • the UL direction is here assumed to be directed towards a control entity, such as a REC, and the DL direction is assumed to be directed away from the control entity.
  • the information is obtained from the adjacent SPB 703, having index k+1 , and the amended information, i.e. Rk_out, is provided to the adjacent SPB 701 , having index k-1 .
  • the information is obtained from the adjacent SPB 701 with index k-1 , and the (obtained) information is provided to the adjacent SPB 703 having index k+1 .
  • the beam forming matrices used according to the method embodiments are related to more antennas than the ones comprised in, or otherwise associated with, one of the SPBs in a chain of SPBs.
  • One SPB could comprise e.g. 2, 4, 8 or 16 antenna elements, which, when the SPB is in operation in a chain of SPBs would constitute a part of e.g. a total set of antenna elements associated with a radio access node.
  • This total set of antenna elements could be referred to as an antenna arrangement, or even as the antenna of the node.
  • Such a total set of antenna elements could comprise e.g. 4x4, 8x8, or 16x16 antenna elements.
  • the same antenna elements e.g. all or a part of the antenna elements comprised in a chain of SPBs, would typically be used in the forming of multiple simultaneous beams. That is, it is not a question of using a separate respective set of antenna elements for forming respective beams.
  • FIG. 7b illustrates a network node 700, such as an RBS or other RA node, according to an exemplifying embodiment.
  • the network node 700 is operable in a wireless communication system and supports beam forming.
  • the network node 700 comprises a chain of SPBs 705, operable to perform beam forming according to embodiments described herein.
  • the illustrated network node further comprises a control entity or unit 710, such as a REC or central DFE, connected to a first SPB in the chain of SPBs.
  • a control entity or unit 710 such as a REC or central DFE
  • the use of a central DFE or corresponding is optional, and therefore the control unit 710 is illustrated with a dashed outline.
  • the network node could comprise a plurality of chains of SPBs (not illustrated).
  • Figure 8 shows a DL aspect of a 4-antenna element SPB 800 according to an exemplifying embodiment.
  • the SPB 800 receives DL samples S e.g. OFDM symbols (where each sample S may be associated with a number of streams), in the frequency domain on an interface, together with beam forming matrices A valid for a number of samples, and information about the frequency allocation.
  • Different users i.e. wireless devices
  • DL information for three users 1 , 2, 3 is illustrated.
  • the " ' " on the numbers in figure 8 are only to indicate that it is not necessarily the same three users as in the uplink case illustrated in figure 9.
  • a common IFFT is used to generate time domain samples which are fed through the DFE functions, e.g. channel filtering, crest factor reduction, digital pre-distortion and finally digital-to-analog (D/A) conversion. If two users have overlapping frequency allocation, the SPB may add the two users contributions in the pre-IFFT buffer.
  • Figure 9 shows an UL aspect of a 4-antenna element SPB 900 according to an exemplifying embodiment.
  • the SPB 900 needs to be provided with UL beam forming matrices B valid for a number of samples, and information about the frequency allocation associated with each user. This information may be received on the same interface as used for DL transmission, and is therefore shown in figure 8, which is related to DL communication.
  • the SPB 900 receives UL samples R_in, e.g. OFDM symbols, in the frequency domain on an interface from a previous SPB.
  • R_in e.g. OFDM symbols
  • Different users will be associated with different sets of samples R_in/R_out, different beam forming matrices B, and different frequency allocations.
  • Samples E are received by the radio frequency, RF, parts of the SPB, closest to the air interface.
  • the samples are then analogue-to-digital (A/D) converted, linearized (if needed), channel filtered, and finally sent to an FFT.
  • the part of the SPB comprising A/D converter, linearizer and channel filter may be referred to as the DFE part of the SPB.
  • FIG. 9 shows an implementation where the frequency domain samples are stored before beam forming, and where beam forming is applied when the corresponding incoming samples R_in are received on the interface.
  • An alternative solution is to store samples after beam forming, and only do the combination when the incoming samples R_in are received.
  • the interface between SPBs can thus carry beam forming matrices A and B per user, frequency allocations per user and frequency domain samples.
  • the method to transfer this information, and the suitable number of samples S to send in each packet, is dependent on the underlying framing protocol. In an LTE system running on Ethernet, the A, B and frequency allocation could be sent in one packet per scheduled user, and user samples S in packets of 12-96 symbols.
  • Other protocols In an LTE system running on Ethernet, the A, B and frequency allocation could be sent in one packet per scheduled user, and user samples S in packets of 12-96 symbols.
  • the wireless devices UE1 -UE3 could represent the three users 1 -3 of which downlink and uplink information is indicated in figures 8 and 9.
  • each UE would then be associated with a respective set of beamforming matrices A and B for uplink and downlink beamforming.
  • UE1 and UE2 could have 2 layers, or virtual antenna streams, in the downlink, thus each being associated with a respective S comprising s1 and s2 (in analogy with previous notation).
  • UE3 could have 4 layers, or virtual antenna streams, thus being associated with an S comprising s1 , s2, s3 and s4.
  • UE1 could be allocated 20 resource blocks, RBs, and thus 240 S per OFDM symbol (since one RB extends over 7 OFDM symbols and comprises 12 resource elements, REs, per OFDM symbol).
  • UE2 could be allocated 50 RBs, i.e.
  • a result of the multiplication may then be stored, e.g. in a buffer, as illustrated in figure 8.
  • the methods and techniques described above may be implemented in a SPB.
  • the SPB may be comprised e.g. in a network node operable in a wireless communication network, such as an eNB operable in an LTE type network.
  • the SPB 1000 is configured to perform at least one of the method embodiments described above with reference e.g. to figures 6 and 7.
  • the SPB 1000 is operable to be connected to two adjacent SPBs, such that a chain of SPBs may be formed.
  • the SPB comprises or is operable to be connected to a plurality of antenna elements, on which radio signals may be transmitted and received.
  • the SPB is associated with the same technical features, objects and advantages as the previously described method embodiments.
  • the SPB will be described in brief in order to avoid unnecessary repetition.
  • the SPB may be implemented and/or described as follows:
  • the SPB 1000 is configured for supporting beamforming.
  • the SPB 1000 comprises processing circuitry 1001 , and is associated with a set of antenna elements 402.
  • the term "associated" here is intended to mean that the SPB is configured to comprise the set of antenna elements, or that it is configured to be connectable to the set of antenna elements.
  • the antenna elements 402 may be integrated with the SPB, or, the SPB may have an I/O interface towards external antenna elements connectable to the SPB. Therefore, the "antenna elements" 402 is illustrated with a dashed outline.
  • the processing circuitry 1001 is configured to cause the SPB 1000 to obtain information from a first adjacent SPB, said information being associated with a beamforming matrix.
  • the processing circuitry 1001 is further configured to cause the SPB to perform an operation on the obtained information based on a predefined part of the beamforming matrix, and to provide information related to the obtained information to a second adjacent SPB.
  • the SPB is thereby configured for and operable to perform beam forming in a distributed manner together with other SPBs in a chain of SPBs.
  • the processing circuitry 1001 could, as illustrated in figure 10b, comprise processing means, such as a processor 1003, e.g. a Central Processing Unit, CPU, and a memory 1004 for storing or holding instructions.
  • processing means such as a processor 1003, e.g. a Central Processing Unit, CPU, and a memory 1004 for storing or holding instructions.
  • the memory would then comprise instructions, e.g. in form of a computer program 1005, which when executed by the processing means 1003 causes the SPB 1000 to perform the actions described above.
  • the processing circuitry 1001 comprises an obtaining unit 406, configured to cause the SPB to obtain information from a first adjacent SPB.
  • the processing circuitry further comprises an operations unit 1007, configured to cause the SPB to perform an operation on the obtained information based on a predefined part of the
  • the processing circuitry further comprises a providing unit 408, configured to cause the SPB to provide information related to the obtained
  • SPBs described above could be configured for the different method embodiments described herein, such as the specific UL and/or DL procedure.
  • the SPB 1000 may be assumed to comprise further functionality when needed, e.g. for carrying out e.g. regular Digital Front End, DFE, functions.
  • the solution described herein also relates to a computer program, which when executed on at least one processor, cause the at least one processor to carry out a method according to any of the embodiment described herein.
  • the solution described herein further relates to a carrier containing a computer program, which when executed on at least one processor, cause the at least one processor to carry out the method according to any embodiment described herein.
  • the carrier may be e.g. one of an electronic signal, an optical signal, a radio signal, or computer readable storage medium.
  • the computer readable storage medium could be embodied in a memory of a device, such as the computer program product 1004 of figure 10b.
  • the computer program can be stored in any way which is suitable for the computer readable storage medium.
  • the computer readable storage medium may e.g. be a removable solid state memory, such as a Universal Serial Bus (USB) stick.
  • USB Universal Serial Bus
  • Particular examples include one or more suitably configured digital signal processors and other known electronic circuits, e.g. discrete logic gates interconnected to perform a specialized function, or Application Specific Integrated Circuits (ASICs).
  • ASICs Application Specific Integrated Circuits
  • at least some of the steps, functions, procedures, modules, units and/or blocks described above may be implemented in software such as a computer program for execution by suitable processing circuitry including one or more processing units.
  • the software could be carried by a carrier, such as an electronic signal, an optical signal, a radio signal, or a computer readable storage medium before and/or during the use of the computer program in the network nodes.
  • the network node and/or network control node described above may be implemented in a so-called cloud solution, referring to that the implementation may be distributed, and the network node and network control node therefore may be so-called virtual nodes or virtual machines.
  • the flow diagram or diagrams presented herein may be regarded as a computer flow diagram or diagrams, when performed by one or more processors.
  • a corresponding apparatus may be defined as a group of function modules, where each step performed by the processor corresponds to a function module.
  • the function modules are implemented as a computer program running on the processor.
  • processing circuitry includes, but is not limited to, one or more microprocessors, one or more Digital Signal Processors, DSPs, one or more Central Processing Units, CPUs, and/or any suitable programmable logic circuitry such as one or more Field Programmable Gate Arrays, FPGAs, or one or more
  • PLCs Programmable Logic Controllers
  • the units or modules in the arrangements in the different nodes described above could be implemented by a combination of analog and digital circuits, and/or one or more processors configured with software and/or firmware, e.g. stored in a memory.
  • processors as well as the other digital hardware, may be included in a single application-specific integrated circuitry, ASIC, or several processors and various digital hardware may be distributed among several separate components, whether individually packaged or assembled into a system-on-a-chip, SoC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne une architecture séquentielle de formation de faisceau, comprenant une pluralité d'unités locales connectées dans l'ordre, chaque unité locale contribuant à la formation d'un ensemble de faisceaux. Un procédé destiné à être exécuté par une telle unité locale, désignée par dispositif de formation de faisceau séquentiel partiel, SPB, consiste à obtenir des informations d'un premier SPB adjacent, lesdites informations étant associées à une matrice de formation de faisceau. Le procédé consiste en outre à exécuter une opération sur les informations reçues, en se basant sur une partie prédéfinie de la matrice de formation de faisceau, et à fournir des informations associées aux informations obtenues à un second SPB adjacent.
PCT/SE2015/050646 2015-06-03 2015-06-03 Réalisation distribuée de formation de faisceau WO2016195556A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2015/050646 WO2016195556A1 (fr) 2015-06-03 2015-06-03 Réalisation distribuée de formation de faisceau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2015/050646 WO2016195556A1 (fr) 2015-06-03 2015-06-03 Réalisation distribuée de formation de faisceau

Publications (1)

Publication Number Publication Date
WO2016195556A1 true WO2016195556A1 (fr) 2016-12-08

Family

ID=53488423

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2015/050646 WO2016195556A1 (fr) 2015-06-03 2015-06-03 Réalisation distribuée de formation de faisceau

Country Status (1)

Country Link
WO (1) WO2016195556A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018080370A1 (fr) * 2016-09-06 2018-05-03 Telefonaktiebolaget Lm Ericsson (Publ) Configuration de résolution de données de liaison montante cpri
US10524274B2 (en) 2016-09-06 2019-12-31 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of a radio equipment of an access node
CN112290218A (zh) * 2020-09-14 2021-01-29 北京遥感设备研究所 一种卫星通信相控阵天线波束快速切换方法
US11063795B2 (en) 2016-11-16 2021-07-13 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for adapting load on a fronthaul network
US11128322B2 (en) 2016-09-06 2021-09-21 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for determination of beamforming information

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110305291A1 (en) * 2010-06-11 2011-12-15 Alcatel-Lucent Usa Inc. MIMO System Having A Plurality Of Service Antennas For Data Transmission And Reception And Method Thereof
US20150092890A1 (en) * 2013-04-24 2015-04-02 Cubic Corporation Efficient signal processing for receive and transmit dbf arrays

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110305291A1 (en) * 2010-06-11 2011-12-15 Alcatel-Lucent Usa Inc. MIMO System Having A Plurality Of Service Antennas For Data Transmission And Reception And Method Thereof
US20150092890A1 (en) * 2013-04-24 2015-04-02 Cubic Corporation Efficient signal processing for receive and transmit dbf arrays

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018080370A1 (fr) * 2016-09-06 2018-05-03 Telefonaktiebolaget Lm Ericsson (Publ) Configuration de résolution de données de liaison montante cpri
US10368362B2 (en) 2016-09-06 2019-07-30 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of transmission order of uplink data
US10420122B2 (en) 2016-09-06 2019-09-17 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of resolution of uplink data
US10524274B2 (en) 2016-09-06 2019-12-31 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of a radio equipment of an access node
US10524273B2 (en) 2016-09-06 2019-12-31 Telefonaktiebolaget Lm Ericsson (Publ) Resource configuration of wireless devices
US10820334B2 (en) 2016-09-06 2020-10-27 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of resolution of uplink data
US11128322B2 (en) 2016-09-06 2021-09-21 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for determination of beamforming information
US11206675B2 (en) 2016-09-06 2021-12-21 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of transmission order of uplink data
US11690059B2 (en) 2016-09-06 2023-06-27 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of transmission order of uplink data
US11063795B2 (en) 2016-11-16 2021-07-13 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for adapting load on a fronthaul network
CN112290218A (zh) * 2020-09-14 2021-01-29 北京遥感设备研究所 一种卫星通信相控阵天线波束快速切换方法
CN112290218B (zh) * 2020-09-14 2023-08-15 北京遥感设备研究所 一种卫星通信相控阵天线波束快速切换方法

Similar Documents

Publication Publication Date Title
US20190260549A1 (en) Unified flexible radio access technology (rat) for 5g mobile communication systems
US10855346B2 (en) Massive MIMO architecture
EP2959651B1 (fr) Tête radio distante universelle
WO2016195556A1 (fr) Réalisation distribuée de formation de faisceau
JP6832937B2 (ja) 無線ネットワークにおける同じリンク方向のサブフレーム部分間のガード期間
CN102546504A (zh) 频域传输方法和装置
JP2019509660A5 (fr)
US20140334312A1 (en) Method and system for digital cancellation scheme with multi-beam
WO2018205976A1 (fr) Procédé et appareil de fourniture de signaux et de canaux physiques dans un réseau sans fil
US20170366238A1 (en) System and method for distributed mimo communications
US20220110098A1 (en) Supporting multi-signal source communications in a distributed communications system
US20200127708A1 (en) Method, system and apparatus
CN109565364B (zh) 空间复用mimo通信中的信号处理
US10383108B2 (en) Data interference cancellation method, transmit end, receive end, and system
EP3809649A1 (fr) Procédé et appareil de commande de transmission de données et dispositif de réseau d'accès
KR20200011711A (ko) I/q 캘리브레이션 방법 및 그 장치
JP2021010183A (ja) 無線ネットワークにおける同じリンク方向のサブフレーム部分間のガード期間
US20240088920A1 (en) Virtual radio interface
JP6851596B2 (ja) 無線基地局および無線基地局の制御方法
Ahmadi Toward 5G
US20190173531A1 (en) Multi-cell coordination system and method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15731742

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15731742

Country of ref document: EP

Kind code of ref document: A1