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WO2019233580A1 - Procédé, appareil, et programme informatique pour un répéteur tdd - Google Patents

Procédé, appareil, et programme informatique pour un répéteur tdd Download PDF

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Publication number
WO2019233580A1
WO2019233580A1 PCT/EP2018/064953 EP2018064953W WO2019233580A1 WO 2019233580 A1 WO2019233580 A1 WO 2019233580A1 EP 2018064953 W EP2018064953 W EP 2018064953W WO 2019233580 A1 WO2019233580 A1 WO 2019233580A1
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WO
WIPO (PCT)
Prior art keywords
signal
power
transmitted
logic circuit
flop circuit
Prior art date
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Ceased
Application number
PCT/EP2018/064953
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English (en)
Inventor
Simone Maier
Heinz Schlesinger
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Nokia Solutions and Networks Oy
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Nokia Solutions and Networks Oy
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Publication date
Application filed by Nokia Solutions and Networks Oy filed Critical Nokia Solutions and Networks Oy
Priority to PCT/EP2018/064953 priority Critical patent/WO2019233580A1/fr
Publication of WO2019233580A1 publication Critical patent/WO2019233580A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources

Definitions

  • the present application relates to a method, apparatus, system and computer program and in particular but not exclusively to a 5G milimeter-wave TDD repeater in fixed wireless access application.
  • a communication system can be seen as a facility that enables communication sessions between two or more entities such as user terminals, base stations and/or other nodes by providing carriers between the various entities involved in the communications path.
  • a communication system can be provided for example by means of a communication network and one or more compatible communication devices.
  • the communication sessions may comprise, for example, communication of data for carrying communications such as voice, video, electronic mail (email), text message, multimedia and/or content data and so on.
  • Non limiting examples of services provided comprise two-way or multi-way calls, data communication or multimedia services and access to a data network system, such as the Internet.
  • wireless communication system at least a part of a communication session between at least two stations occurs over a wireless link.
  • wireless systems comprise public land mobile networks (PLMN), satellite based communication systems and different wireless local networks, for example wireless local area networks (WLAN).
  • PLMN public land mobile networks
  • WLAN wireless local area networks
  • the wireless systems can typically be divided into cells, and are therefore often referred to as cellular systems.
  • a user can access the communication system by means of an appropriate communication device or terminal.
  • a communication device of a user may be referred to as user equipment (UE) or user device.
  • UE user equipment
  • a communication device is provided with an appropriate signal receiving and transmitting apparatus for enabling communications, for example enabling access to a communication network or communications directly with other users.
  • the communication device may access a carrier provided by a station, for example a base station of a cell, and transmit and/or receive communications on the carrier.
  • the communication system and associated devices typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved. Communication protocols and/or parameters which shall be used for the connection are also typically defined.
  • UTRAN 3G radio
  • Other examples of communication systems are the long-term evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio-access technology and so-called 5G or New Radio (NR) networks.
  • NR is being standardized by the 3rd Generation Partnership Project
  • an apparatus comprising means for: receiving a first signal; receiving a second signal; determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted; and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • the apparatus comprises means for: causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit.
  • the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the apparatus comprises means for: detecting the power of the first signal and detecting the power of the second signal.
  • the means for detecting the power of the first signal and the means for detecting the power of the second signal comprise a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: receiving a first signal; receiving a second signal; determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted; and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • apparatus is caused to perform: causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit.
  • the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the apparatus is caused to perform: detecting the power of the first signal and detecting the power of the second signal.
  • the detecting the power of the first signal and the detecting the power of the second signal are performed by a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: receiving a first signal; receiving a second signal; determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted; and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • apparatus is caused to perform: causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit.
  • the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the apparatus is caused to perform: detecting the power of the first signal and detecting the power of the second signal.
  • the detecting the power of the first signal and the detecting the power of the second signal are performed by a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • a method comprising: receiving a first signal; receiving a second signal; determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted; and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • the method comprises causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit. In some embodiments, the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the method comprises: detecting the power of the first signal and detecting the power of the second signal.
  • the detecting the power of the first signal and the detecting the power of the second signal are performed by a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • an apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: receiving a first signal; receiving a second signal; determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted; and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform: causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit.
  • the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform: detecting the power of the first signal and detecting the power of the second signal.
  • the detecting the power of the first signal and the detecting the power of the second signal are performed by a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • a communications system comprising at least one base station, at least one user equipment and at least one apparatus comprising means for receiving a first signal from the at least one base station, receiving a second signal from the at least one user equipment, determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted to the at least one user equipment and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted to the at least one base station.
  • the apparatus comprises means for: causing the first signal or the second signal to be transmitted.
  • the logic circuit comprises at least one flip flop circuit.
  • the logic circuit comprises a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit comprises an edge- triggered D-type flip-flop circuit.
  • the apparatus comprises means for: detecting the power of the first signal and detecting the power of the second signal.
  • the means for detecting the power of the first signal and the means for detecting the power of the second signal comprise a radio frequency envelop detector.
  • the first signal is an uplink signal and the second signal is a downlink signal.
  • Figure 1 shows a schematic diagram of an example communication system comprising a base station and a plurality of communication devices
  • Figure 2 shows a schematic diagram of an example mobile communication device
  • Figure 3 shows a schematic diagram of an example control apparatus
  • Figure 4 shows a block diagram of a repeater in accordance with an embodiment
  • Figure 5 shows a block diagram of a logic circuit in accordance with an embodiment
  • Figure 6 shows a block diagram of a repeater in accordance with an embodiment
  • Figure 7 shows a schematic diagram of a system comprising repeaters in accordance with an embodiment
  • Figure 8 shows a block diagram of a test setup to evaluate performance of TDD switching logic
  • Figure 9 shows a measurement result of a test setup.
  • a wireless communication system 100 such as that shown in figure 1
  • mobile communication devices or user equipment (UE) 102, 104, 105 are provided wireless access via at least one base station or similar wireless transmitting and/or receiving node or point.
  • Base stations are typically controlled by at least one appropriate controller apparatus, so as to enable operation thereof and management of mobile communication devices in communication with the base stations.
  • the controller apparatus may be located in a radio access network (e.g. wireless communication system 100) or in a core network (CN) (not shown) and may be implemented as one central apparatus or its functionality may be distributed over several apparatus.
  • the controller apparatus may be part of the base station and/or provided by a separate entity such as a Radio Network Controller.
  • control apparatus 108 and 109 are shown to control the respective macro level base stations 106 and 107.
  • the control apparatus of a base station can be interconnected with other control entities.
  • the control apparatus is typically provided with memory capacity and at least one data processor.
  • the control apparatus and functions may be distributed between a plurality of control units. In some systems, the control apparatus may additionally or alternatively be provided in a radio network controller.
  • base stations 106 and 107 are shown as connected to a wider communications network 1 13 via gateway 112.
  • a further gateway function may be provided to connect to another network.
  • the smaller base stations 1 16, 1 18 and 120 may also be connected to the network 1 13, for example by a separate gateway function and/or via the controllers of the macro level stations.
  • the base stations 1 16, 1 18 and 120 may be pico or femto level base stations or the like. In the example, stations 1 16 and 1 18 are connected via a gateway 1 1 1 whilst station 120 connects via the controller apparatus 108. In some embodiments, the smaller stations may not be provided. Smaller base stations 1 16, 1 18 and 120 may be part of a second network, for example WLAN and may be WLAN APs.
  • the communication devices 102, 104, 105 may access the communication system based on various access techniques, such as code division multiple access (CDMA), or wideband CDMA (WCDMA).
  • CDMA code division multiple access
  • WCDMA wideband CDMA
  • Other non-limiting examples comprise time division multiple access (TDMA), frequency division multiple access (FDMA) and various schemes thereof such as the interleaved frequency division multiple access (I FDMA), single carrier frequency division multiple access (SC-FDMA) and orthogonal frequency division multiple access (OFDMA), space division multiple access (SDMA) and so on.
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • I FDMA interleaved frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SDMA space division multiple access
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • LTE-A LTE Advanced
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Base stations of such systems are known as evolved or enhanced Node Bs (eNBs) and provide E-UTRAN features such as user plane Packet Data Convergence/Radio Link Control/Medium Access Control/Physical layer protocol (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the communication devices.
  • E-UTRAN features such as user plane Packet Data Convergence/Radio Link Control/Medium Access Control/Physical layer protocol (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the communication devices.
  • RRC Radio Resource Control
  • Other examples of radio access system comprise those provided by base stations of systems that are based on technologies such as wireless local area network (WLAN) and/or WiMax (Worldwide Interoperability for Microwave Access).
  • WLAN wireless local area network
  • WiMax Worldwide Interoperability for Microwave Access
  • Network architecture in NR may be similar to that of LTE-advanced.
  • Base stations of NR systems may be known as next generation Node Bs (gNBs).
  • Changes to the network architecture may depend on the need to support various radio technologies and finer QoS support, and some on-demand requirements for e.g. QoS levels to support QoE of user point of view.
  • network aware services and applications, and service and application aware networks may bring changes to the architecture. Those are related to Information Centric Network (ICN) and User-Centric Content Delivery Network (UC-CDN) approaches.
  • ICN Information Centric Network
  • UC-CDN User-Centric Content Delivery Network
  • NR may use multiple input - multiple output (MIMO) antennas, many more base stations or nodes than the LTE (a so- called small cell concept), including macro sites operating in co-operation with smaller stations and perhaps also employing a variety of radio technologies for better coverage and enhanced data rates.
  • MIMO multiple input - multiple output
  • Future networks may utilise network functions virtualization (NFV) which is a network architecture concept that proposes virtualizing network node functions into“building blocks” or entities that may be operationally connected or linked together to provide services.
  • a virtualized network function (VNF) may comprise one or more virtual machines running computer program codes using standard or general type servers instead of customized hardware. Cloud computing or data storage may also be utilized.
  • radio communications this may mean node operations to be carried out, at least partly, in a server, host or node operationally coupled to a remote radio head. It is also possible that node operations will be distributed among a plurality of servers, nodes or hosts. It should also be understood that the distribution of labour between core network operations and base station operations may differ from that of the LTE or even be non-existent.
  • a possible mobile communication device will now be described in more detail with reference to Figure 2 showing a schematic, partially sectioned view of a communication device 200.
  • a communication device is often referred to as user equipment (UE) or terminal.
  • An appropriate mobile communication device may be provided by any device capable of sending and receiving radio signals.
  • Non-limiting examples comprise a mobile station (MS) or mobile device such as a mobile phone or what is known as a’smart phone’, a computer provided with a wireless interface card or other wireless interface facility (e.g., USB dongle), personal data assistant (PDA) or a tablet provided with wireless communication capabilities, or any combinations of these or the like.
  • a mobile communication device may provide, for example, communication of data for carrying communications such as voice, electronic mail (email), text message, multimedia and so on.
  • Non-limiting examples of these services comprise two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet. Users may also be provided broadcast or multicast data.
  • Non-limiting examples of the content comprise downloads, television and radio programs, videos, advertisements, various alerts and other information.
  • a mobile device is typically provided with at least one data processing entity 201 , at least one memory 202 and other possible components 203 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with access systems and other communication devices.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 204.
  • the user may control the operation of the mobile device by means of a suitable user interface such as key pad 205, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 208, a speaker and a microphone can be also provided.
  • a mobile communication device may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • the mobile device 200 may receive signals over an air or radio interface 207 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 206.
  • the transceiver apparatus 206 may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • Figure 3 shows an example of a control apparatus for a communication system, for example to be coupled to and/or for controlling a station of an access system, such as a RAN node, e.g. a base station, eNB or gNB, a relay node or a node of a core network such as an MME or S-GW, or a server or host.
  • a station of an access system such as a RAN node, e.g. a base station, eNB or gNB, a relay node or a node of a core network such as an MME or S-GW, or a server or host.
  • the method may be implanted in a single control apparatus or across more than one control apparatus.
  • the control apparatus may be integrated with or external to a node or module of a core network or RAN.
  • base stations comprise a separate control apparatus unit or module.
  • the control apparatus can be another network element such as a radio network controller or a spectrum controller.
  • each base station may have such a control apparatus as well as a control apparatus being provided in a radio network controller.
  • the control apparatus 300 can be arranged to provide control on communications in the service area of the system.
  • the control apparatus 300 comprises at least one memory 301 , at least one data processing unit 302, 303 and an input/output interface 304. Via the interface the control apparatus can be coupled to a receiver and a transmitter of the base station.
  • the receiver and/or the transmitter may be implemented as a radio front end or a remote radio head.
  • a wireless connection may be used in so-called fixed wireless access networks.
  • Wireless links in the millimeter-wave ranges may provide abundant spectrum with higher contiguous bandwidths than wireless links in the microwave range.
  • the available antenna arrays may have a smaller size at higher carrier frequencies, enabling smaller equipment.
  • Propagation conditions in the millimeter-wave band and non-line-of-sight connections in the access links may lead to small cell sizes between the serving hub and the end users.
  • a wireless repeater is proposed which enables a two hops system architecture.
  • the wireless repeater In the upstream (uplink) the wireless repeater accumulates the access signals from many users and forwards them on preferred line of sight front haul connections to existing hub sites which have a high bandwidth connection to the backbone network. In the downstream (downlink) the wireless repeater receives front haul signals from the existing hub sites and forwards them to users as access signals.
  • Repeaters for TDD operation use either an additional control signal sent by the base station to detect and calculate the exact timing for the up-and downlink time slots via digital base band processing, digital base band signal processing of at least a portion of the data signal or a RF power detection based scheme, but with an additional digital timing logic which may prevent fully flexible switching operation needed for high data rates and 5G operation.
  • Such repeaters may be too complex and/or costly.
  • the wireless repeaters should be small and low cost while enabling high data rates over long link lengths.
  • the wireless repeater should provide a fully flexible ratio between down link and uplink times (duration and intervals) controlled by the network side with very fast transition times ( ⁇ 100ns).
  • a repeater may comprise an apparatus as described hereafter.
  • An apparatus in accordance with embodiments comprises means for receiving a first signal and means for receiving a second signal.
  • the apparatus comprises means for determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted.
  • the apparatus comprises means for determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • the logic circuit may comprise at least one flip flop circuit.
  • the logic circuit may comprise a first flip flop circuit with the first signal as an input and a second flip flop circuit with the second signal as input.
  • the first flip flop circuit and second flip flop circuit may comprise an edge-triggered D-type flip-flop circuit.
  • the first signal may be a downlink signal.
  • the second signal may be an uplink signal.
  • the apparatus may comprise means for causing the first signal or the second signal to be transmitted.
  • the first signal or second signal may be caused to be transmitted at the same or different frequency to which it was received.
  • the first and second signal may be in the mm- wave range.
  • the required accurate switching between uplink and downlink times slots for a TDD system may thus be controlled based on analog RF signal power detection analysed by a logic containing edge-triggered flip-flops in a fully flexible way. No information (i.e. frame structure and exact switching timing) is required from the central hub.
  • Figure 4 shows an example repeater for use in a system where the fronthaul link is in the 39GFIz band and the access link is in the 28GFIz band.
  • the means for receiving a first signal comprise a 39GFIz receiver antenna.
  • the means for receiving a second signal comprises a 28GFIz receiver array.
  • the repeater comprises a RF power detection circuit and a TDD logic control circuit.
  • the means for causing the first signal to be transmitted comprises a 28GFIz transmitter array.
  • the means for causing the second signal to be transmitted comprises a 39GFIz transmitter antenna.
  • the apparatus may comprise a means for detecting the power of the first signal and a means for detecting the power of the second signal.
  • Figure 5 shows a block diagram of an example architecture for analog RF power detection based TDD logic.
  • the logic may provide a simple and fast TDD logic.
  • a power detector (PD) detects the downlink data signal power.
  • a second power detector detects the uplink data signal power.
  • the PDs may be, for example, RF envelope detectors.
  • the means for determining if the power of the first signal is higher than a reference power value and if the power of the second signal is higher than a reference power value may comprise a comparator.
  • comparators are positioned after each of the PDs.
  • the comparators may use a fixed reference voltage as a threshold value.
  • the logic comprises buffers.
  • the buffers are used to decouple the components and to enable a longer line length to the edge-triggered D-type flip-flops.
  • the first, or upper, flip-flop circuit receives a rising edge and sets the output high.
  • the second, or lower, flip-flop circuit is reset and waits for a rising edge at its input, corresponding to an uplink or second signal power level approaching the reference threshold at the lower comparator. If the lower flip flop receives a rising edge, the lower flip-flop resets the upper flip-flop and generates a low at the output. The next rising edge on the downlink signal power can then set the output level to high to start the cycle again.
  • An additional splitter may be used to control two switches between transmitting the first signal and the second signal (switching between downlink or uplink time slots) in a decoupled way. If the hub and the users all transmit only at their respective times slots assigned by higher layer signalling then also the repeater will work in sync.
  • Figure 6 shows a block diagram of a possible embodiment.
  • the block diagram depicts the location of the power detectors (PD1 , PD2), controlling the TDD sensor circuit.
  • the block diagram also depicts switches (SWn).
  • the switches may be configured to select one of a plurality of fixed beam patterns of the antenna.
  • the switches may be analog switches.
  • SW1 and SW4 control the TDD switching functionality between the UL and DL.
  • the beam switches SW2 and SW3 may be configured by a control channel input to select one of a plurality of fixed beam patterns of the DL and UL antennas.
  • the block diagram illustrates a signal 610 transmitted by the downlink antenna.
  • the block diagram also illustrates a signal 620 transmitted by the uplink antenna.
  • the fronthaul and access links may be in the same band (i.e. 28GHz) or in different bands (i.e. fronthaul link in 39GHz band and access link in 28GHz band as described with reference to Figure 4).
  • the power detector may be placed at a location where the data signal power is high, e.g. after the power amplifier both in the access and fronthaul transmitter for downlink and uplink detection, respectively. At this point the signal also has passed the available filters and therefore any unwanted interference from disturbing signals which could otherwise disturb TDD switching scheme may be minimized.
  • the switching between DL and UL time slots may be performed either with additional RF switches or by directly switching the PAs on and off based on the TDD logic output.
  • the power detectors are placed between the pre-amplifiers and the final stage PAs so that these final stage PAs can then be switched on or off.
  • the system shown in Figure 6 includes a passive antenna array together with a switch for the access beam switching. This means that the antenna has e.g. 8 inputs corresponding to the available 8 beam directions and the switch is a 1 :8 switch. Based on the configuration of the antenna set by the control channel information, the switch forwards the RF data signal to/from one antenna beam.
  • a system comprising a plurality of mmWave repeaters is shown in Figure 7.
  • the repeaters may be working on the same frequency but with spatial separation or on the same frequency but in TDD mode or on different frequencies.
  • a repeater as defined with reference to Figure 4 to 7 may be fully flexible.
  • the repeater may be low cost because it comprises analog architecture, omitting digital processing of the data signal.
  • Figure 8 shows a simplified test setup which may be used to evaluate the performance of the TDD switching logic.
  • two coupled signal sources transmitting TDD test signals were used to generate DL and UL data signals.
  • the DL signal was then split up in two paths. One path serves as input into the DL power detector, the other one is the input into the test switch. Both components can operate up to 40 GHz.
  • the output of the TDD logic either turns the switch on for DL time slot or off for UL time slot.
  • the resulting output signals were then analysed with an oscilloscope or a spectrum analyser. In the first test, the speed performance of the switching was tested.
  • the measured results with RF test signals at 1 GHz are shown in Figure 9 and were measured with an oscilloscope.
  • the top channel 1 depicts the marker signal as reference which is time aligned with the DL RF data signal.
  • the second from top channel 2 is the output of our TDD logic circuit.
  • a‘high’ is UL time slot and a‘low’ is DL time slot and turns the DL switch on.
  • the delay between the rising edge of the marker in channel one and the falling edge of the TDD logic output in channel 2 is only around 50 ns.
  • the second from bottom channel 3 analyses the RF signal at the DL switch output. There, the very fast complete switching delay between incoming RF signal and switch output signal of only 64 ns can be measured which is well below the target of 100 ns for 5G systems.
  • a DL test signal at 39 GHz was generated and the data signal performance was analysed with a spectrum analyser.
  • the apparatus may comprise a control apparatus as described with reference to Figure 3.
  • Control functions may comprise receiving a first signal, receiving a second signal, determining if the power of the first signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the first signal is caused to be transmitted and determining if the power of the second signal is higher than a reference power value; and, if so, resetting the output of a logic circuit such that the second signal is caused to be transmitted.
  • apparatuses may comprise or be coupled to other units or modules etc., such as radio parts or radio heads, used in or for transmission and/or reception.
  • apparatuses have been described as one entity, different modules and memory may be implemented in one or more physical or logical entities.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the embodiments of this invention may be implemented by computer software executable by a data processor of the mobile device, such as in the processor entity, or by hardware, or by a combination of software and hardware.
  • Computer software or program also called program product, including software routines, applets and/or macros, may be stored in any apparatus- readable data storage medium and they comprise program instructions to perform particular tasks.
  • a computer program product may comprise one or more computer-executable components which, when the program is run, are configured to carry out embodiments.
  • the one or more computer-executable components may be at least one software code or portions of it.
  • any blocks of the logic flow as in the Figures may represent program steps, or interconnected logic circuits, blocks and functions, or a combination of program steps and logic circuits, blocks and functions.
  • the software may be stored on such physical media as memory chips, or memory blocks implemented within the processor, magnetic media such as hard disk or floppy disks, and optical media such as for example DVD and the data variants thereof, CD.
  • the physical media is a non-transitory media.
  • the memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the data processors may be of any type suitable to the local technical environment, and may comprise one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), FPGA, gate level circuits and processors based on multi core processor architecture, as non-limiting examples.
  • Embodiments of the inventions may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process.
  • Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

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

Abstract

L'invention concerne un appareil comprenant des moyens pour : recevoir un premier signal ; recevoir un second signal ; déterminer si la puissance du premier signal est supérieure à une valeur de puissance de référence ; et, si tel est le cas, réinitialiser la sortie d'un circuit logique de sorte à commander que le premier signal soit transmis ; et déterminer si la puissance du second signal est supérieure à une valeur de puissance de référence ; et, si tel est le cas, réinitialiser la sortie d'un circuit logique de sorte à commander que le second signal soit transmis.
PCT/EP2018/064953 2018-06-07 2018-06-07 Procédé, appareil, et programme informatique pour un répéteur tdd Ceased WO2019233580A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/064953 WO2019233580A1 (fr) 2018-06-07 2018-06-07 Procédé, appareil, et programme informatique pour un répéteur tdd

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/064953 WO2019233580A1 (fr) 2018-06-07 2018-06-07 Procédé, appareil, et programme informatique pour un répéteur tdd

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WO2019233580A1 true WO2019233580A1 (fr) 2019-12-12

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050254442A1 (en) * 2004-05-13 2005-11-17 Widefi, Inc. Non-frequency translating repeater with detection and media access control
US20050286448A1 (en) * 2002-06-21 2005-12-29 Widefi, Inc. Wireless local area network repeater
CN101471723A (zh) * 2007-12-26 2009-07-01 北京朗波芯微技术有限公司 一种用于时分双工系统的双向动态放大方法及装置
EP3008828B1 (fr) * 2013-06-12 2017-08-09 Corning Optical Communications Wireless Ltd. Duplexage par répartition temporelle (tdd) dans des systèmes de communication répartis, comprenant des systèmes d'antenne répartis (das)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050286448A1 (en) * 2002-06-21 2005-12-29 Widefi, Inc. Wireless local area network repeater
US20050254442A1 (en) * 2004-05-13 2005-11-17 Widefi, Inc. Non-frequency translating repeater with detection and media access control
CN101471723A (zh) * 2007-12-26 2009-07-01 北京朗波芯微技术有限公司 一种用于时分双工系统的双向动态放大方法及装置
EP3008828B1 (fr) * 2013-06-12 2017-08-09 Corning Optical Communications Wireless Ltd. Duplexage par répartition temporelle (tdd) dans des systèmes de communication répartis, comprenant des systèmes d'antenne répartis (das)

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