EP3075080A1 - Procédé et appareil pour combiner des transmissions bidirectionnelles à l'alternat et simultanée dans un relais - Google Patents

Procédé et appareil pour combiner des transmissions bidirectionnelles à l'alternat et simultanée dans un relais

Info

Publication number
EP3075080A1
EP3075080A1 EP13795754.4A EP13795754A EP3075080A1 EP 3075080 A1 EP3075080 A1 EP 3075080A1 EP 13795754 A EP13795754 A EP 13795754A EP 3075080 A1 EP3075080 A1 EP 3075080A1
Authority
EP
European Patent Office
Prior art keywords
relay station
mode
traffic
phase
antenna
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.)
Withdrawn
Application number
EP13795754.4A
Other languages
German (de)
English (en)
Inventor
Esa Tapani Tiirola
Kari Pekka Pajukoski
Ilkka HARJULA
Olav Tirkkonen
Risto Wichman
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.)
Nokia Solutions and Networks Oy
Original Assignee
Nokia Solutions and Networks Oy
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 Nokia Solutions and Networks Oy filed Critical Nokia Solutions and Networks Oy
Publication of EP3075080A1 publication Critical patent/EP3075080A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode

Definitions

  • the exemplary and non-limiting embodiments of this invention relate generally to wireless communications networks, and more particularly to an antenna configuration.
  • a directional antenna also referred to as a beam antenna, is an antenna that radiates or receives radio waves more effectively in some directions than in others. An increased performance on transmit and receive and a reduced interference from unwanted sources is achievable by means of the directional antenna.
  • the directional antenna may be realized as an antenna array consisting of a group of radiators.
  • relay nodes For efficient heterogeneous network planning, a concept of relay nodes (RN) has been introduced in 3GPP LTE-advanced.
  • the relay nodes also referred to as relay stations, RS
  • RS relay stations
  • eNode-Bs that provide enhanced coverage and capacity at cell edges. Relaying enables providing extended LTE coverage in targeted areas at low cost. It is anticipated that 5G systems provide inbuilt support for relaying and
  • An aspect of the invention relates to a method for controlling a relay station in
  • the method comprising defining a first antenna group of the relay station and a second antenna group of the relay station according to a radiation pattern, wherein when uplink data traffic is transmitted from the relay station, the first antenna group of the relay station is controlled to operate in a transmit (Tx) phase, and the second antenna group of the relay station is controlled to operate in a receive (Rx) phase or is not in use, and when downlink data traffic is received in the relay station, the first antenna group of the relay station is controlled to operate in the receive (Rx) phase, and the second antenna group of the relay station is controlled to operate in the transmit (Tx) phase or is not in use.
  • Tx transmit
  • Rx receive
  • Tx transmit
  • a further aspect of the invention relates to an apparatus comprising at least one processor; and at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to perform any of the method steps.
  • a still further aspect of the invention relates to a computer program product comprising program instructions which, when run on a computing apparatus, causes the computing apparatus to perform the method.
  • Figure 1 illustrates a scenario for half-duplex and full duplex operation with high unbalance between upstream and downstream data
  • Figure 2 illustrates exemplary antenna usage in mode 1 ;
  • Figure 3 illustrates exemplary antenna usage in mode 2
  • Figure 4 illustrates an exemplary frame structure with mode 1 for control part
  • Figure 5 illustrates an exemplary frame structure with FDMA & mode 2 for control part
  • Figure 6 shows a simplified block diagram illustrating exemplary system architecture
  • Figure 7 shows a simplified block diagram illustrating exemplary apparatuses
  • Figure 8 shows a messaging diagram illustrating exemplary signalling
  • Figure 9 shows a schematic diagram of a flow chart according to an exemplary embodiment of the invention
  • Figure 10 shows a schematic diagram of a flow chart according to another exemplary embodiment of the invention.
  • An exemplary embodiment relates to local area (LA) optimization of LTE-advanced which can materialize as 4G evolution or 5G.
  • An exemplary embodiment considers full-duplex and half-duplex multi-hop forwarding in a 5G local area network.
  • the network there is a high density of self-backhauling relay nodes (relay stations, RS) that simultaneously act as access points towards the users in addition to few nodes with a wired backhaul.
  • the access is framed and synchronized along the multi-hop flow, and the nodes utilize frequency resources of an unpaired frequency band.
  • An exemplary embodiment enables controlling relay operation (especially antennas & transmit/receive (Tx/Rx) chains) in order to optimize relay functionality in various situations and use cases.
  • Both half-duplex and full duplex operation have their own pros and cons (see also exemplary Figure 1 ).
  • Full-duplex is a type of communication in which data can flow back and forth between two devices at the same time.
  • Full duplex refers to simultaneous bidirectional communication.
  • Full duplex operation mode may suffer from the self- interference.
  • Half-duplex is a type of communication in which data can flow back and forth between two devices, but not simultaneously. Each device in a half-duplex system can send and receive data, but only one device is able to transmit at a time.
  • the antenna arrays are typically arranged in a manner that Tx and Rx directions are different.
  • the relay station receives signals from one direction and transmits to another, making it difficult to listen to e.g. control signals arriving from the Tx direction. This may be critical, for example, while forwarding data in upstream, since the control information from an access point (AP) is arriving downstream.
  • Half-duplex mode reduces the throughput by up-to 50% compared to full duplex mode in a case with high unbalance between up-stream traffic and down-stream traffic (up-stream traffic originates from UE side; down-stream traffic originates from the network side).
  • Half duplex and full duplex are known operation modes for relays.
  • UL uplink
  • DL downlink
  • BS full duplex base station
  • UE user equipment
  • an access scheme may be used where part of the traffic is carried out in half duplex and part of the traffic is carried out in full duplex.
  • that access scheme focuses solely on the BS - UE link.
  • An exemplary embodiment discloses how to control relay operation from (relay) device point of view.
  • An exemplary embodiment relates to a relay station, wherein the functionality of antennas (including Tx/Rx circuits) is adjusted w.r.t. each other.
  • the relay station has at least two (Tx/Rx) antennas, and the relay station utilizes the same frequency band for transmission and reception (w/o duplex filters).
  • the relay station has at least two (Tx/Rx) antennas, and the relay station utilizes different frequency bands for transmission and reception, respectively.
  • the relay station has at least two (Tx/Rx) antennas, and the relay station utilizes a different frequency band or a same frequency band for transmission and reception of the control information, and utilizes a same frequency band or a different frequency band for transmission and reception of data.
  • An exemplary embodiment relates to a scheme including two modes for configuring antennas (including Tx/Rx circuits).
  • each of the antennas in mode 1 , is configured to operate either in a Tx phase or in a Rx phase.
  • in mode 2 at least one antenna operates in the Tx phase and at least one other antenna operates in the Rx phase.
  • the usage of the antennas depends also on antenna patterns w.r.t. a link direction of the traffic stream such that upstream and downstream traffic utilize the available antennas (including Tx/Rx circuits) in different ways.
  • the antenna usage changes dynamically based on the link direction of the data stream (this is a part of dynamic scheduling).
  • Figure 2 illustrates exemplary antenna usage in mode 1 .
  • Figure 3 illustrates exemplary antenna usage in mode 2. Both Figure 2 and Figure 3 assume that the access point AP and the user equipment UE are placed similarly as in Figure 1 .
  • antennas may also refer to antenna beams, wherein usage of directional antennas cover also a case in which directivity (i.e. a directional radiation pattern) is achieved via a beam forming technique including the usage of antenna arrays.
  • directivity i.e. a directional radiation pattern
  • a beam forming technique including the usage of antenna arrays.
  • the antennas were identical (i.e. the radiation pattern of an individual Tx/Rx antenna is the same), there may be a difference on the antenna orientation/beam direction, wherein the radiation pattern is different for different antenna groups.
  • the relationship between the direction of the data stream and the usage of directional antennas may be as follows.
  • the antennas (or beams) are grouped into two groups (A, B) in a predetermined way according to a radiation pattern.
  • a radiation pattern, also named as an antenna pattern or far-field pattern, of an antenna refers to a directional (angular) dependence of the strength of the radio waves from the antenna.
  • Upstream traffic triggers that one of the groups, A (or B), operates in the Tx phase - whereas the other group of antennas, B (or A), operates in the Rx phase (mode 2) or is not in use (mode 1 ).
  • Downstream traffic triggers that one of the groups, A (or B), operates in the Rx phase - whereas the other group of antennas, B (or A), operates in the Tx phase (mode 2) or is not in use (mode 1 ).
  • eNB/AP makes a decision on a selected relay mode.
  • the decision may be made in a semi-static or dynamic manner.
  • the selection may be done for the entire subframe/radio frame/any predefined time duration (for the time being).
  • the relay mode is selected separately for a control part and a data part of the subframe.
  • the relay mode may also be selected in a channel-specific manner. For example, in case the relay node is receiving some critical channel (e.g. PRACH) the relay node may temporarily use the half-duplex mode even if the relay node has been configured to use the full-duplex mode.
  • some critical channel e.g. PRACH
  • the frame may be divided into data and control parts, and these parts may be allocated with different operation modes. For example, it may be possible to a) use mode 2 for both data and control traffic, b) use mode 2 for the data traffic and mode 1 for the control traffic, and/or c) use mode 2 for the data traffic and mode 2 with FDMA for the control traffic.
  • Figure 4 illustrates an exemplary frame structure with mode 1 for the control part.
  • Figure 5 illustrates an exemplary frame structure with FDMA & mode 2 for the control part. It should be noted that for simplicity, possible guard periods (or switching gaps) needed in some scenarios between different modes (mode 1 and mode 2) and/or between Tx and Rx phases (mode 1 ) are not shown in the figure.
  • the relay operation mode may be selected based on a ratio of the up-stream traffic (denoted as A) and the down-stream traffic (denoted as B). Mode 1 is selected in case
  • the reception initiates (forwarding) transmission without any need for separate triggering/resource allocation.
  • Tx timing is derived based on reception timing (x) + pre-defined (maximum) processing time (Tp), and duration of the current Rx phase (y).
  • the actual transmission time is obtained by quantizing/ceiling (x+y+Tp) with the predefined frame timing.
  • Tx timing is derived based on reception timing (x) + Pre-defined (maximum) processing time (Tp), and duration of the Rx phase (y).
  • the actual transmission time is obtained by quantizing/ceiling (x+ Tp) with the predefined frame timing.
  • dedicated higher layer signalling is used to configure the mode to be applied.
  • the relay mode is selected dynamically, it is also possible to use scheduling grants and/or implicit signalling (i.e. an absence of the scheduling grant) to indicate the applied relay mode (including the direction of the stream).
  • the antenna usage changes dynamically based on the direction of the data stream (this may be a part of dynamic scheduling).
  • An exemplary embodiment enables optimizing the relay operation (especially antennas & Tx Rx chains) in different situations (e.g. with antenna types applied).
  • An exemplary embodiment enables an improved resource allocation (& relay operation in general) between the downstream and upstream traffic.
  • An exemplary embodiment enables maintaining the quality of critical control information also in the case where the full duplex relay is in use.
  • an exemplary embodiment relates to an antenna configuration of the full duplex relays.
  • a hybrid combination of HDR (half-duplex relay) and FDR (full-duplex relay) is provided in order to achieve the full duplex operation mode while allowing dynamic operation in the half duplex modes to accommodate varying channel/antenna/traffic conditions.
  • the frame is divided into the control and data parts, and a selection is performed between the HDR and FDR mode based on some selection criteria.
  • the relay station utilizes an unpaired band (the same frequency band for transmission and reception) (w/o duplex filters) by grouping antennas (or beams) into two groups (A, B) in a predetermined way according to the radiation pattern, wherein the usage of the directional antennas is controlled based on the direction of the data stream.
  • the upstream traffic causes that one of the groups (A) operates in the Tx phase, whereas the other group of antennas (B) operates in the Rx phase (full duplex mode) or is switched off (half duplex mode).
  • the downstream traffic causes that one of the groups (A) operates in the Rx phase, whereas the other group of antennas (B) operates in the Tx phase (full duplex mode) or is switched off (half duplex mode).
  • An exemplary embodiment may be applied, for example, to different usage of the directional antennas, e.g. for control and data, criteria for the usage of the directional antennas, etc.
  • An exemplary embodiment provides hybrid operation modes (full duplex and half duplex) control for the relay mode, and the full duplex/half duplex mode is controlled by configuring the relay node antenna to Rx or Tx mode.
  • An exemplary embodiment is applicable to future communication protocols, e.g. 5G cellular and also potentially to other next generation backhaul (i.e. mesh related) networks and 802.1 1 xx.
  • future communication protocols e.g. 5G cellular and also potentially to other next generation backhaul (i.e. mesh related) networks and 802.1 1 xx.
  • frequency band(s) is (are) utilized above illustrating various relay operations, an exemplary embodiment is not so limited.
  • the present invention is applicable to any user terminal, network node, server, corresponding component, and/or to any communication system or any combination of different communication systems that support antenna usage with relays.
  • the communication system may be a fixed communication system or a wireless
  • LTE long term evolution
  • UMTS universal mobile telecommunications system
  • GSM Global System for Mobile communications
  • EDGE EDGE
  • WCDMA Bluetooth network
  • WLAN Wireless Local Area Network
  • the presented solution may be applied between elements belonging to different but compatible systems such as LTE and UMTS.
  • a general architecture of a communication system is illustrated in Figure 1 .
  • Figure 1 is a simplified system architecture only showing some elements and functional entities, all being logical units whose implementation may differ from what is shown.
  • the connections shown in Figure 1 are logical connections; the actual physical connections may be different. It is apparent to a person skilled in the art that the systems also comprise other functions and structures. It should be appreciated that the functions, structures, elements and the protocols used in or for antenna configurations with HDR/FDR relays, are irrelevant to the actual invention. Therefore, they need not to be discussed in more detail here.
  • the exemplary radio system of Figure 6 comprises a network node 601 of a network operator.
  • the network node 601 may include e.g. an LTE/LTE-A base station (eNB), radio network controller (RNC), or any other network element, or a combination of network elements.
  • the network node 601 may be connected to one or more core network (CN) elements (not shown in Figure 6) such as a mobile switching centre (MSC), MSC server (MSS), mobility management entity (MME), gateway GPRS support node (GGSN), serving GPRS support node (SGSN), home location register (HLR), home subscriber server (HSS), visitor location register (VLR).
  • MSC mobile switching centre
  • MSC server MSC server
  • MME mobility management entity
  • GGSN gateway GPRS support node
  • HLR home location register
  • HSR home subscriber server
  • VLR visitor location register
  • the radio network node 601 that may also be called eNB (enhanced node-B, evolved node-B) or network apparatus of the radio system, hosts the functions for radio resource management in a public land mobile network.
  • Figure 6 shows one or more relay stations RS 602 located in the service area of the radio network node 601 .
  • the relay station refers to a low power LTE-A base station which may also be referred to as a relay node (RN).
  • the relay station 602 is capable of connecting to the radio network node 601 via a connection 603.
  • the relay station 602 may also be capable of connecting to a user equipment, such as a mobile station (not shown in Figure 6).
  • Figure 7 is a block diagram of an apparatus according to an embodiment of the invention.
  • Figure 7 shows a relay station 602 located in the area of a radio network node 601 .
  • the relay station 602 is configured to be in connection with the radio network node 601 .
  • the relay station 602 comprises a controller 701 operationally connected to a memory 702 and a transceiver 703.
  • the controller 701 controls the operation of the relay station 602.
  • the memory 702 is configured to store software and data.
  • the transceiver 703 is configured to set up and maintain a wireless connection 603 to the radio network node 601 .
  • the transceiver 703 is operationally connected to a set of antenna ports 704 connected to an antenna arrangement 705.
  • the antenna arrangement 705 may comprise a set of antennas.
  • the number of antennas may be one to four, for example.
  • the number of antennas is not limited to any particular number.
  • the relay station 602 may also comprise various other components; they are not displayed in the figure due to simplicity.
  • the radio network node 601 such as an LTE-A base station (eNode-B, eNB) comprises a controller 706 operationally connected to a memory 707, and a transceiver 708.
  • the controller 706 controls the operation of the radio network node 601 .
  • the memory 707 is configured to store software and data.
  • the transceiver 708 is configured to set up and maintain a wireless connection to the relay station 602 within the service area of the radio network node 601 .
  • the transceiver 708 is operationally connected to an antenna arrangement 709.
  • the antenna arrangement 709 may comprise a set of antennas.
  • the number of antennas may be two to four, for example.
  • the number of antennas is not limited to any particular number.
  • the radio network node 601 may be operationally connected (directly or indirectly) to another network element (not shown in Figure 7) of the communication system, such as a radio network controller (RNC), a mobility management entity (MME), an MSC server (MSS), a mobile switching centre (MSC), a radio resource management (RRM) node, a gateway GPRS support node, an operations, administrations and maintenance (OAM) node, a home location register (HLR), a visitor location register (VLR), a serving GPRS support node, a gateway, and/or a server, via an interface.
  • RNC radio network controller
  • MME mobility management entity
  • MSC server MSC server
  • MSC mobile switching centre
  • RRM radio resource management
  • gateway GPRS support node an operations, administrations and maintenance (OAM) no
  • the apparatus 601 , 602 has been depicted as one entity, different modules and memory may be implemented in one or more physical or logical entities.
  • the apparatus may also be a user terminal which is a piece of equipment or a device that associates, or is arranged to associate, the user terminal and its user with a subscription and allows a user to interact with a communications system.
  • the user terminal presents information to the user and allows the user to input information.
  • the user terminal may be any terminal capable of receiving information from and/or transmitting information to the network, connectable to the network wirelessly or via a fixed connection.
  • the apparatus 601 , 602 may generally include a processor, controller, control unit or the like connected to a memory and to various interfaces of the apparatus.
  • the processor is a central processing unit, but the processor may be an additional operation processor.
  • the processor may corn-prise a computer processor, application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), and/or other hardware components that have been programmed in such a way to carry out one or more functions of an embodiment.
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the memory 702, 707 may include volatile and/or non-volatile memory and typically stores content, data, or the like.
  • the memory 702, 707 may store computer program code such as software applications (for example for the detector unit and/or for the adjuster unit) or operating systems, information, data, content, or the like for a processor to perform steps associated with operation of the apparatus in accordance with embodiments.
  • the memory may be, for example, random access memory (RAM), a hard drive, or other fixed data memory or storage device. Further, the memory, or part of it, may be removable memory detachably connected to the apparatus.
  • an apparatus implementing one or more functions of a corresponding mobile entity described with an embodiment comprises not only prior art means, but also means for implementing the one or more functions of a corresponding apparatus described with an embodiment and it may comprise separate means for each separate function, or means may be configured to perform two or more functions.
  • these techniques may be implemented in hardware (one or more apparatuses), firmware (one or more
  • firmware or software implementation can be through modules (e.g. procedures, functions, and so on) that perform the functions described herein.
  • the software codes may be stored in any suitable, processor/computer-readable data storage medium(s) or memory unit(s) or article(s) of manufacture and executed by one or more processors/computers.
  • the data storage medium or the memory unit may be implemented within the processor/computer or external to the processor/computer, in which case it can be communicatively coupled to the processor/computer via various means as is known in the art.
  • an apparatus 601 such as a network node (e.g. a LTE-A base station eNB or access point AP) may select/configure/define an operation mode for an apparatus 602 (e.g. a relay station RS) in item 801 .
  • the network node 601 transmits information on/allocates the selected/configured/defined operation mode to the relay station 602.
  • the message 802 is received in the relay station 602.
  • the relay station adjusts 803 its operation mode.
  • the relay station may transmit (or receive) data traffic by using the adjusted operation mode.
  • the relay station operation mode may be selected 803 dynamically (or semi-statically) in the relay station 602 e.g. based on the direction of the data stream.
  • FIG. 9 is a flow chart illustrating an exemplary embodiment.
  • the apparatus 601 (which may comprise e.g. a LTE-A base station eNB or access point AP), may
  • FIG. 10 is a flow chart illustrating an exemplary embodiment.
  • the apparatus 602 (which may comprise e.g. a relay station RS), may receive, in item 101 , a message from apparatus 601 (which may comprise e.g. a LTE-A base station eNB or access point AP) in which message the base station 601 transmits information on/allocates a
  • the relay station may adjust 102 its operation mode.
  • the relay station may transmit (or receive) data traffic by using the adjusted operation mode.
  • the relay station operation mode may be selected 102 dynamically (or semi-statically) in the relay station 602 e.g. based on the direction of the data stream.
  • the steps/points, signalling messages and related functions de-scribed above in Figures 1 to 10 are in no absolute chronological order, and some of the steps/points may be performed simultaneously or in an order differing from the given one. Other functions can also be executed between the steps/points or within the steps/points and other signalling messages sent be-tween the illustrated messages. Some of the steps/points or part of the steps/points can also be left out or replaced by a corresponding step/point or part of the step/point.
  • the apparatus operations illustrate a procedure that may be implemented in one or more physical or logical entities.
  • the signalling messages are only exemplary and may even comprise several separate messages for transmitting the same information. In addition, the messages may also contain other information.

Landscapes

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

Abstract

L'invention concerne l'utilisation d'antennes en communication, et en particulier un procédé pour commander une station relais en communication, le procédé consistant à définir un premier groupe d'antennes de la station relais (602) et un second groupe d'antennes de la station relais en fonction d'un diagramme de rayonnement. Quand du trafic de données de liaison montante est transmis par la station relais, le premier groupe d'antennes de la station relais est commandé pour fonctionner dans une phase de transmission (Tx), et le second groupe d'antennes de la station relais est commandé pour fonctionner dans une phase de réception (Rx) ou n'est pas en utilisation. Quand du trafic de données de liaison descendante est reçu dans la station relais, le premier groupe d'antennes de la station relais est commandé pour fonctionner dans la phase Rx, et le second groupe d'antennes de la station relais est commandé pour fonctionner dans la phase Tx ou n'est pas en utilisation.
EP13795754.4A 2013-11-26 2013-11-26 Procédé et appareil pour combiner des transmissions bidirectionnelles à l'alternat et simultanée dans un relais Withdrawn EP3075080A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/074684 WO2015078483A1 (fr) 2013-11-26 2013-11-26 Procédé et appareil pour combiner des transmissions bidirectionnelles à l'alternat et simultanée dans un relais

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EP3075080A1 true EP3075080A1 (fr) 2016-10-05

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CN106559127B (zh) * 2015-09-24 2019-11-26 中国移动通信集团公司 一种基于中继的双向通信方法及设备
US10341081B2 (en) * 2016-07-22 2019-07-02 Apple Inc. User equipment that autonomously selects between full and half duplex operations
CN106357377B (zh) * 2016-08-30 2020-06-12 上海交通大学 基于分集增益的全双工半双工混合中继实现方法
CN106535202A (zh) * 2016-11-10 2017-03-22 桂林电子科技大学 一种中继辅助非授权用户的半双工/全双工混合传输方法
CN108235222B (zh) * 2016-12-12 2019-09-17 电信科学技术研究院 一种发送数据的方法和设备
WO2019047201A1 (fr) * 2017-09-11 2019-03-14 海能达通信股份有限公司 Procédé et dispositif de configuration de ressources de transmission sans fil dans un réseau maillé sans fil, et équipement de communication
US11671168B2 (en) 2019-09-05 2023-06-06 Qualcomm Incorporated Relay with a configurable mode of operation
US11824620B2 (en) 2019-09-05 2023-11-21 Qualcomm Incorporated Remote unit with a configurable mode of operation
CN112533225B (zh) * 2020-12-29 2023-03-10 上海瀚讯信息技术股份有限公司 基于涡旋波束的全双工无线网络及其节点配对方法
CN115396073B (zh) * 2021-05-25 2024-05-17 维沃移动通信有限公司 无线通信方法、装置和设备

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CN105765880A (zh) 2016-07-13

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