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WO2025185178A1 - Dispositifs et procédés pour des transmissions mimo efficaces dans un réseau sans fil - Google Patents

Dispositifs et procédés pour des transmissions mimo efficaces dans un réseau sans fil

Info

Publication number
WO2025185178A1
WO2025185178A1 PCT/CN2024/126200 CN2024126200W WO2025185178A1 WO 2025185178 A1 WO2025185178 A1 WO 2025185178A1 CN 2024126200 W CN2024126200 W CN 2024126200W WO 2025185178 A1 WO2025185178 A1 WO 2025185178A1
Authority
WO
WIPO (PCT)
Prior art keywords
station
evm
indication
mimo
mcs
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/126200
Other languages
English (en)
Other versions
WO2025185178A8 (fr
Inventor
Genadiy Tsodik
Shimon SHILO
Doron Ezri
Yoav Levinbook
Rani Keren
Oded Redlich
Jian Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025185178A1 publication Critical patent/WO2025185178A1/fr
Publication of WO2025185178A8 publication Critical patent/WO2025185178A8/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H04B7/0413—MIMO systems

Definitions

  • the present disclosure relates to wireless communications. More specifically, the present disclosure relates to devices and methods for efficient MIMO transmissions in a wireless network, in particular a wireless local access network, WLAN, i.e. Wi-Fi network according to the IEEE 802.11 framework of standards.
  • WLAN wireless local access network
  • IEEE 802.11-based WLANs have become popular at an unprecedented rate.
  • MIMO, Multiple Input Multiple Output, techniques may be used in wireless local area networks, WLANs, in particular Wi-Fi networks to achieve better spectral efficiency and to increase the throughput.
  • This includes single-user, SU, and multi-user, MU, MIMO in both trigger-based, TB, and non-TB physical protocol data units, PPDUs.
  • non-linear detection is often applied at the receiver side.
  • non-linear detection is usually very sensitive to so-called RF impairments.
  • a maximum acceptable transmit error vector magnitude, EVM, level has been defined in the IEEE 802.11 framework of standards, however, for a single stream transmission over an additive white Gaussian noise, AWGN, channel.
  • MIMO transmissions may require a higher transmit EVM threshold to achieve the desired performance.
  • even a relatively small change ofthe RF impairments may have a significant impact on the performance.
  • the noise level at the receiver is relatively low and the transmission Error Vector Magnitude, Tx EVM, defines the performance.
  • a multi-antenna Wi-Fi station e.g. a non-AP station or AP station
  • the Wi-Fi station comprises a communication interface comprising a plurality of antennas configured for a multiple-input multiple-output, MIMO, transmission to the at least one further Wi-Fi station with an adjustable transmission Error Vector Magnitude, Tx EVM, wherein the communication interface is further configured to receive from the at least one further Wi-Fi station an indication of a desired Tx EVM for one or more upcoming MIMO transmissions from the Wi-Fi station to the at least one further Wi-Fi station.
  • the Wi-Fi station comprises a processing circuitry configured to adjust one or more MIMO transmission parameters based on the indication of the desired Tx EVM for adjusting the Tx EVM not to exceed the desired Tx EVM for the one or more upcoming MIMO transmissions from the Wi-Fi station according to the first aspect to the at least one further Wi-Fi station. Indicating the desired Tx EVM to the Wi-Fi station allows the further Wi-Fi station to better adjust the MIMO transmissions of the Wi-Fi station to the further Wi-Fi station, in particular the detector type used by the further Wi-Fi station.
  • the plurality of antennas are further configured for receiving a MIMO transmission from the at least one further Wi-Fi station, wherein the communication interface of the Wi-Fi station according to the first aspect is further configured to transmit to the at least one further Wi-Fi station an indication of a desired Tx EVM for one or more upcoming MIMO transmission from the at least one further Wi-Fi station to the Wi-Fi station according to the first aspect.
  • the indication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises a value of the desired Tx EVM.
  • theindication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises a plurality of bits, in particular 6 bits, encoding the value of the desired Tx EVM.
  • the indication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises a difference value between the desired Tx EVM and a default Tx EVM, in particular a standardized Tx EVM.
  • the indication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises a plurality of bits, in particular 3 bits, encoding the difference value.
  • the Wi-Fi station comprises a data structure, in particular a table or list, for mapping each of a plurality of modulation and coding schemes, MCSs, identified by a respective MCS index to a respective default Tx EVM and wherein the indication of the desired Tx EVM comprises an integer step value for determining an MCS index of an MCS associated with the desired Tx EVM based on the MCS index of a currently selected MCS for transmitting data.
  • the indication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises a plurality of bits, in particular 2 bits, encoding the integer step value.
  • the Wi-Fi station in case the integer step value does not allow to determine the MCS index of the MCS associated with the desired Tx EVM based on the MCS index of the currently selected MCS, the Wi-Fi station according to the first aspect is configured to determine the desired Tx EVM as the Tx EVM associated with the currently selected MCS plus a unit Tx EVM times the integer step value.
  • the indication of the desired Tx EVM (received or transmitted by the Wi-Fi station according to the first aspect) comprises an indication of an operation mode and/or MIMO configuration of a plurality of operation modes and/or MIMO configurations of the Wi-Fi station according to the first aspect, wherein each operation mode and/or MIMO configuration is associated with a respective Tx EVM.
  • each MIMO configuration is defined by a MCS, e.g. a MCS index, and a number of spatial streams.
  • the indication of the operation mode comprises a plurality of bits, in particular 2 bits, encoding the operation mode.
  • the Wi-Fi station is configured to determine the desired Tx EVM value and/or an improved Tx EVM value based on the indication of the operation mode and/or the MIMO configuration using for every operation mode a table defining a mapping between the indication of the MIMO configuration and the desired Tx EVM valueand/or the improved Tx EVM.
  • the Wi-Fi station is configured to determine the desired Tx EVM value and/or the improved Tx EVM value based on the indication of the operation mode and/or the MIMO configuration using for every operation mode a table defining a mapping between the indication of the MIMO configuration and a difference value between a default Tx EVM value and the desired Tx EVM valueand/or the improved Tx EVM value.
  • the Wi-Fi station according to the first aspect in particular the communication interface thereof, is configured to send a capabilities indication to the at least one further Wi-Fi station, wherein the capabilities indication is indicative of the capability of the Wi-Fi station according to the first aspect to adjust the Tx EVM not to exceed the desired Tx EVM for the one or more upcoming MIMO transmissions from the Wi-Fi station according to the first aspect to the at least one further Wi-Fi station.
  • an improved Tx EVM value is configured.
  • This improved Tx EVM value can be configuredas a constant and/or can be dynamically indicated.
  • the value of the improved Tx EVM can be globally defined, e.g. in the IEEE 802.11 standard, or defined during set-up of the network. In case improved Tx EVM is supported, improved Tx EVM value represents a threshold value, not to be exceeded.
  • the capabilities indication may comprise a data structure, in particular a bit or a bitmap, indicating that improved Tx EVM is supported for each of a plurality of modulation and coding schemes, MCSs.
  • the capabilities indication may comprise a data structure, in particular 4 or 6 bits, indicating the highest MCS identified by a respective MCS indexthat supports improved Tx EVM.
  • bitmap 1010 indicates that improved Tx EVM is supported for all schemes lower and equal to MCS12.
  • the capabilities indication may comprise a data structure, in particular 4 or 6 bits, indicating the onlyMCS identified by a respective MCS index that supports improved Tx EVM.
  • the capabilities indication may comprise a data structure, in particular a table, alist or a bitmap, for indicating per MCSidentified by a respective MCS index, if improved Tx EVM is supported or not. For example, a bit value of 0 indicates no Tx EVM support for a respective MCS and a bit value of 1 indicates that Tx EVM is supported for a respective MCS, or vice versa.
  • the capabilities indication comprises a data structure, in particular a table or list, for mapping each of a plurality MCSs identified by a respective MCS index to a respective improved Tx EVM value.
  • the capabilities indication of the improved Tx EVM can comprise an improved Tx EVM value.
  • the indication of the improved Tx EVM may comprise a data structure, in particular 4 or 6 bits, encoding the improved Tx EVM value.
  • the communication interface of the Wi-Fi station according to the first aspect is configured to receive a trigger frame from the at least one further Wi-Fi station, wherein the trigger frame, in particular a User-Dependent Info field thereof, comprises the indication of the desired Tx EVM, wherein the processing circuitry of the Wi-Fi station according to the first aspect is configured to adjust one or more MIMO transmission parameters for adjusting the Tx EVM not to exceed the desired Tx EVM for the MIMO transmission from the Wi-Fi station according to the first aspect in the form of, i.e. as a trigger based, TB, PPDU.
  • the communication interface of the Wi-Fi station according to the first aspect is configured to receive a beacon frame from the at least one further Wi-Fi station, wherein the beacon frame comprises the indication of the desired Tx EVM and wherein the processing circuitry of the Wi-Fi station according to the first aspect is configured to adjust the one or more MIMO transmission parameters for adjusting the Tx EVM not to exceed the desired Tx EVM for one or more MIMO transmissions from the Wi-Fi station within a beacon period.
  • the trigger frame or the beacon frame further comprises one or more data structures, in particular tables or lists, wherein the Wi-Fi station according to the first aspect is configured to determine the desired Tx EVM based on the indication of the desired Tx EVM and the one or more data structures, in particular tables or lists.
  • the trigger frame or the beacon frame may comprise a data structure, in particular table or list, for each operation mode of the Wi-Fi station according to the first aspect.
  • a method for operating a multi-antenna Wi-Fi station, i.e. a non-AP station or an AP station, for communication with at least one further Wi-Fi station, wherein the Wi-Fi station comprises a communication interface comprising a plurality of antennas configured for a multiple-input multiple-output, MIMO, transmission to the at least one further Wi-Fi station with an adjustable transmission Error Vector Magnitude, Tx EVM, wherein the method comprises the steps of:
  • adjusting one or more MIMO transmission parameters based on the indication of the desired Tx EVM for adjusting the Tx EVM not to exceed the desired Tx EVM for the one or more upcoming MIMO transmissions from the Wi-Fi station to the at least one further Wi-Fi station.
  • the method according to the second aspect can be performed by the Wi-Fi station according to the first aspect.
  • further features of the method according to the second aspect result directly from the functionality of theWi-Fi station according to the first aspect as well as its different implementation forms described above and below.
  • a computer program product comprising program code which causes a computer or a processor to perform the method according to the second aspect, when the program code is executed by the computer or the processor.
  • Fig. 1 is a schematic diagram showing a Wi-Fi station according to an embodiment exchanging one or more frames with a further Wi-Fi station;
  • Fig. 2 shows an indication included in a frame exchanged between a Wi-Fi station according to an embodiment and a further Wi-Fi station, wherein the indication comprises a desired Tx EVM value;
  • Fig. 3 shows an indication included in a frame exchanged between a Wi-Fi station according to an embodiment and a further Wi-Fi station, wherein the indication comprises a difference value between a desired Tx EVM value and a default Tx EVM value;
  • Fig. 4 shows an indication included in a frame exchanged between a Wi-Fi station according to an embodiment and a further Wi-Fi station, wherein the indication comprises an integer step value for determining a desired Tx EVM value based on a table of Tx EVM values;
  • Fig. 5 shows a table used by a Wi-Fi station according to an embodiment for determining a desired Tx EVM value based on an indication included in a frame exchanged between the Wi-Fi station and a further Wi-Fi station;
  • Fig. 6 shows a capabilities indication included in a frame exchanged between a Wi-Fi station according to an embodiment and a further Wi-Fi station;
  • Fig. 7 shows a flow diagram illustrating steps of a method of operating a Wi-Fi station according to an embodiment for communication with at least one further Wi-Fi station.
  • a disclosure in connection with a described method may also hold true for a corresponding device or system configured to perform the method and vice versa.
  • a corresponding device may include one or a plurality of units, e.g. functional units, to perform the described one or plurality of method steps (e.g. one unit performing the one or plurality of steps, or a plurality of units each performing one or more of the plurality of steps) , even if such one or more units are not explicitly described or illustrated in the figures.
  • a specific apparatus is described based on one or a plurality of units, e.g.
  • a corresponding method may include one step to perform the functionality of the one or plurality of units (e.g. one step performing the functionality of the one or plurality of units, or a plurality of steps each performing the functionality of one or more of the plurality of units) , even if such one or plurality of steps are not explicitly described or illustrated in the figures. Further, it is understood that the features of the various exemplary embodiments and/or aspects described herein may be combined with each other, unless specifically noted otherwise.
  • Fig. 1 shows an exemplary wireless communication network 100, in particular a Wi-Fi network 100 including an access point, AP, 120 and a non-AP station 110 in the form of a smartphone 110 as an example for a plurality of non-AP stations which may be associated and communicate with the AP 120.
  • the wireless communication network 100 is a WLAN in accordance with the IEEE 802.11 framework of standards (also referred to as a Wi-Fi network 100) .
  • the non-AP station 110 comprises processing circuitry 111 and a communication interface 113, in particular a wireless communication interface 113 in accordance with the IEEE 802.11 framework of standards.
  • the communication interface 113 may comprise one or more power amplifiers 113a and a plurality of antennas 113b configured for a multiple-input multiple-output, MIMO, transmission to the AP 120.
  • the processing circuitry 111 of the non-AP station 110 may be implemented in hardware and/or software and may comprise digital circuitry, or both analog and digital circuitry.
  • Digital circuitry may comprise components such as application-specific integrated circuits (ASICs) , field-programmable gate arrays (FPGAs) , digital signal processors (DSPs) , or general-purpose processors.
  • the non-AP station 110 may further comprise a memory 115 configured to store executable program code which, when executed by the processing circuitry 111, causes the non-AP station 110 to perform the functions and methods described herein.
  • the AP 120 illustrated in Fig. 1 comprises processing circuitry 121 and a communication interface 123, in particular a wireless communication interface 123 in accordance with the IEEE 802.11 framework of standards.
  • the communication interface 123 may comprise one or more power amplifiers 123a and a plurality of antennas 123b configured for a MIMO transmission to the non-AP station 110.
  • the processing circuitry 121 of the AP 120 may be implemented in hardware and/or software and may comprise digital circuitry, or both analog and digital circuitry.
  • Digital circuitry may comprise components such as application-specific integrated circuits (ASICs) , field-programmable gate arrays (FPGAs) , digital signal processors (DSPs) , or general-purpose processors.
  • the AP 120 may further comprise a memory 125 configured to store executable program code which, when executed by the processing circuitry 121, causes the AP 120 to perform the functions and methods described herein.
  • both the non-AP station 110 and the AP 120 are a Wi-Fi station configured to perform MIMO transmission to the other station (herein referred to as the further Wi-Fi station) , i.e. the AP 120 or the non-AP station 110.
  • the Wi-Fi station is the non-AP station 110
  • the further Wi-Fi station is the AP 120.
  • these embodiments apply as well to a scenario, where the AP 120 is the Wi-Fi station and the non-AP station 110 is the further Wi-Fi station 110.
  • the communication interface 113 with the plurality of antennas 113b of the non-AP station 110 is configured for MIMO transmissions to the AP 120 with an adjustable Tx EVM.
  • the non-AP station 110 may perform MIMO transmissions to the AP 120 with different Tx EVMs depending on the selected MIMO transmission parameters or settings, such as a selected modulation and coding scheme, MCS.
  • the communication interface 113 of the non-AP station 110 is further configured to receive from the AP 120 an indication 131 of a desired Tx EVM (such as the indication illustrated in Fig. 2) for one or more upcoming MIMO transmissions from the non-AP station 110 to the AP 120. As illustrated in Fig.
  • the communication interface 113 of the non-AP station 110 may receive one or more frames 130, such as trigger frames or beacon frames, from the AP 120, wherein the indication 131 of the desired Tx EVM is included in the one or more frames 130.
  • the non-AP station 110 is configured to transmit to the AP 120 the same indication 131 of a desired Tx EVM for one or more upcoming MIMO transmissions from the AP 120 to the non-AP station 110.
  • the processing circuitry 111 of the non-AP station 110 is configured to adjust one or more MIMO transmission parameters based on the indication 131 of the desired Tx EVM for adjusting the Tx EVM not to exceed the desired Tx EVM for the one or more upcoming MIMO transmissions from the non-AP station 110 to the AP 120.
  • the AP 120 may select the decoder type for decoding the MIMO transmissions from the non-AP station 110. More specifically, for using a linear decoder the AP 120 may indicate a smaller desired Tx EVM, while for using a non-linear decoder the AP 120 may indicate a larger desired Tx EVM.
  • the indication 131 of the desired Tx EVM value may be part of a beacon frame 130 or a trigger frame 130, in particular the User-Dependent Info field of a trigger frame 130.
  • the indication 131 of the desired Tx EVM value may be valid and used by the non-AP station 110 for all MIMO transmissions in the upcoming beacon period.
  • the triggered non-AP station 110 may use the desired Tx EVM value for the current TB PPDU sent in response to the trigger frame 130.
  • Fig. 2 shows an indication 131 of the desired Tx EVM included in a field of a frame 130 exchanged between the non-AP station 110 according to an embodiment and the AP 120 according to an embodiment, wherein the indication 131 comprises an explicit desired Tx EVM value, for instance, the explicit desired Tx EVM value in dB.
  • the indication 131 may cover a range of desired Tx EVM values of 40dB.
  • the range of 40dB with a resolution of 1dB may be encoded by the indication 131 having a size of 6 bits.
  • Fig. 3 shows a variant of the indication 131 of the desired Tx EVM included in a field of a frame 130 exchanged between the non-AP station 110 according to an embodiment and the AP 120 according to an embodiment, wherein the indication 131 comprises a difference value (i.e. a correction or delta value) TxEVM delta between the desired Tx EVM value and a default Tx EVM value that would be used by the non-AP station 110 without the indication 131.
  • a difference value i.e. a correction or delta value
  • the default Tx EVM value may be a Tx EVM value TxEVM std defined by the IEEE 802.11 framework of standardsfor the settings used by the non-AP station 110, such as a currently selected MCS, so that in this embodiment the non-AP station 110 may determine the desired Tx EVM value as TxEVM std + TxEVM delta .
  • the indication 131 of the desired Tx EVM comprises a plurality of bits, in particular 3 bits, encoding the difference value between the desired Tx EVM value and the default Tx EVM value.
  • Fig. 4 shows a further variant of the indication 131 included in a field of a frame 130 exchanged between the non-AP station 110 according to an embodiment and the AP 120 according to an embodiment, wherein the indication 131 comprises an integer step value, such as 2 steps, for determining a desired Tx EVM value based on a table of Tx EVM values, which may be stored, for instance, in the memory 115 of the non-AP station 110.
  • the integer step value may indicate how many steps are to be taken in the table used by the non-AP station 110 for determining the desired Tx EVM value.
  • the new MCS index MCS Tx is only used by the non-AP station 110 for determining the desired Tx EVM value, but not for the actual MIMO transmission (for which the current MCS is used) .
  • the non-AP station 110 is configured to determine the desired Tx EVM as the Tx EVM associated with the currently selected MCS plus a unit Tx EVM, such as 3dB, times the integer step value.
  • the indication 131 of the desired Tx EVM comprises a plurality of bits, in particular 2 bits, encoding the integer step value.
  • Fig. 5 shows atable used by the non-AP station 110 for afurther variant of the indication 131 included in a field of a frame 130 exchanged between the non-AP station 110 according to an embodiment and the AP 120 according to an embodiment.
  • the table comprises for each of a plurality of MIMO configurations 132a-n a desired Tx EVM value 131a-n or a difference value 131a-n between a desired Tx EVM value and a default Tx EVM value.
  • the indication 131 of the desired Tx EVM comprises an indication of an operation mode 132a-n and/or MIMO configuration of a plurality of operation modes and/or MIMO configurations of the non-AP station 110 so that based on the table illustrated in Fig. 5 (and possibly further tables) and the operation mode 132a-n indicated by the indication 131 the non-AP station 110 may determine the desired Tx EVM 131a-n.
  • each MIMO configuration is defined by a MCS and/or a number of spatial streams.
  • the indication 131 of the mode of operation may include an indication of a MIMO detector type or any other parameters.
  • the mode of operation may be indicated by index only.
  • the non-AP station 110 may be configured to use for every mode of operation a table of Tx EVM value (or Tx EVM correction value) per MIMO configuration as illustrated in Fig. 5.
  • the MIMO configuration field may only be required, if different Tx EVM values are defined for different MIMO configurations. Otherwise, this field may not be used and a single Tx EVM value may be indicated per operation mode.
  • the Tx EVM table illustrated in Fig. 5 may be part of the indication 131 itself. In another embodiment, the Tx EVM table illustrated in Fig. 5 may be already available at the non-AP station 110 and/or defined by the IEEE 802.11 framework of standards. In an embodiment, one or more Tx EVM tables (per operation mode) , such as the Tx EVM table illustrated in Fig. 5, may be indicated as part of a capabilities indication 135 (illustrated in Fig. 6) in a beacon frame 130. As the current IEEE 802.11 framework of standards allows indicating the number of supported streams per MCS, in a similar way in an embodiment the desired Tx EVM value or Tx EVM delta value may be indicated per MIMO configuration and per operation mode.
  • the indication 131 indicative of the mode of operation and to be used by the non-AP station 110 for determining the desired Tx EVM based on or more Tx EVM tables, such as the Tx EVM table illustrated in Fig. 5, may comprise 2 bits of a trigger frame 130 (if there are four different modes of operation) .
  • the indication 131 may be included in an Operation Mode (OM) Control field, for example, in two reserved bits of the OM Control field.
  • OM Operation Mode
  • Fig. 6 shows a capabilities indication 135 included in a frame 130 exchanged between the non-AP station 110 according to an embodiment and the AP 120 according to an embodiment, wherein the capabilities indication 135 is indicative of the capability of the non-AP station 110 to adjust the Tx EVM not to exceed the desired Tx EVM for MIMO transmissions by the non-APstation 110.
  • the capabilities indication 135 comprises a data structure, in particular a bit or a bitmap, indicating that improved Tx EVM is supported for each of a plurality of modulation and coding schemes, MCSs.
  • the capabilities indication 135 comprises a data structure, in particular 4 or 6 bits, indicating the highest MCS identified by a respective MCS index that supports improved Tx EVM.
  • the capabilities indication 135 comprises a data structure, in particular 4 or 6 bits, indicating the onlyMCS identified by a respective MCS index that supports improved Tx EVM.
  • the capabilities indication 135 comprises a data structure, in particular a table, alist or a bitmap, for indicating per MCSidentified by a respective MCS index, if improved Tx EVM is supported or not. For example, a bit value of 0 indicates no Tx EVM support for a respective MCS and a bit value of 1 indicates that Tx EVM is supported for a respective MCS, or vice versa.
  • the capabilities indication 135 of the improved Tx EVM comprises an improved Tx EVM value.
  • the indication of the improved Tx EVM may comprise a data structure, in particular 4 or 6 bits, encoding the improved Tx EVM value.
  • Fig. 7 shows a flow diagram illustrating steps of a method 700 of operating the Wi-Fi station 110for communication with the at least one further Wi-Fi station 120.
  • the Wi-Fi station 110 comprises a communication interface 113 comprising a plurality of antennas 113b configured for MIMO transmissions to the at least one further Wi-Fi station 120 with an adjustable Tx EVM.
  • the method 700 comprises a step 701 of receiving from the at least one further Wi-Fi station 120 an indication 131 of a desired Tx EVM for one or more upcoming MIMO transmissions from the Wi-Fi station 110 to the at least one further Wi-Fi station 120.
  • the method 700 comprises a step 703 of adjusting one or more MIMO transmission parameters based on the indication 131 of the desired Tx EVM for adjusting the Tx EVM not to exceed the desired Tx EVM for the one or more upcoming MIMO transmissions from the Wi-Fi station 110 to the at least one further Wi-Fi station 120.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the described embodiment of an apparatus is merely exemplary.
  • the unit division is merely logical function division and may be another division in an actual implementation.
  • a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented by using some interfaces.
  • the indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.
  • the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • functional units in the embodiments of the disclosure may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit.

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

Abstract

Une station Wi-Fi (110 ; 120) pour une communication avec au moins une autre station Wi-Fi est divulguée. La station Wi-Fi comprend une interface de communication (113 ; 123) comprenant une pluralité d'antennes (113b ; 123b) configurées pour une transmission à entrées et sorties multiples (MIMO) à ladite autre station Wi-Fi avec une amplitude de vecteur d'erreur de transmission (EVM Tx) réglable. L'interface de communication est également configurée pour recevoir, de ladite autre station Wi-Fi, une indication d'une EVM Tx souhaitée pour une ou plusieurs transmissions MIMO depuis la station Wi-Fi. La station Wi-Fi comprend également un circuit de traitement (111 ; 121) configuré pour ajuster un ou plusieurs paramètres de transmission MIMO sur la base de l'indication de l'EVM Tx souhaitée afin d'ajuster l'EVM Tx pour qu'elle ne dépasse pas l'EVM Tx souhaitée pour la ou les transmissions MIMO depuis la station Wi-Fi.
PCT/CN2024/126200 2024-03-07 2024-10-21 Dispositifs et procédés pour des transmissions mimo efficaces dans un réseau sans fil Pending WO2025185178A1 (fr)

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PCT/CN2024/080600 WO2025184874A1 (fr) 2024-03-07 2024-03-07 Dispositifs et procédés pour des transmissions mimo efficaces dans un réseau sans fil
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