WO2018187947A1 - Procédé de transmission de données, dispositif réseau et dispositif terminal - Google Patents

Procédé de transmission de données, dispositif réseau et dispositif terminal Download PDF

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Publication number
WO2018187947A1
WO2018187947A1 PCT/CN2017/080171 CN2017080171W WO2018187947A1 WO 2018187947 A1 WO2018187947 A1 WO 2018187947A1 CN 2017080171 W CN2017080171 W CN 2017080171W WO 2018187947 A1 WO2018187947 A1 WO 2018187947A1
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Prior art keywords
sub
time
band
time unit
transmitting
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PCT/CN2017/080171
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English (en)
Chinese (zh)
Inventor
李振宇
张武荣
南杨
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华为技术有限公司
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Priority to PCT/CN2017/080171 priority Critical patent/WO2018187947A1/fr
Priority to CN201780088889.5A priority patent/CN110447174B/zh
Publication of WO2018187947A1 publication Critical patent/WO2018187947A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques

Definitions

  • Embodiments of the present invention relate to the field of communications, and more particularly, to a method of transmitting data, a network device, and a terminal device.
  • unlicensed spectrum resources are larger than licensed spectrum resources. If the unlicensed spectrum can be effectively utilized, the spectrum efficiency of wireless communication will be greatly improved.
  • the main technology used on unlicensed spectrum is Wireless Fidelity (Wifi) technology, but wifi has drawbacks in terms of mobility, security, Quality of Service (QoS), and simultaneous handling of multi-user scheduling.
  • ETSI European Telecommunications Standards Institute
  • ETSI EN 300 328 divides devices using the 2.4 GHz band into Wideband Modulation devices and frequency hopping ( Frequency hopping), and further refined into adaptive devices and non-adaptive devices, different devices have to comply with different rules.
  • the LBT-based adaptive frequency hopping device needs to meet the limitation that the output power is less than 20 dBm and the transmission time is not more than 60 ms; for example, based on the non-adaptive frequency hopping device, the output power needs to be less than 20 dBm, and the medium utilization (Medium)
  • the utilization, MU) rate is not more than 10%
  • the single transmission time is not more than 5ms
  • the cumulative transmission time is not more than 15ms.
  • MU (P/100mW)*DC
  • P is the output power
  • DC is the duty ratio.
  • the LBT-based adaptive wideband modulation device needs to satisfy the Power Spectral Density (PSD) of less than 10dBm/MHz and the output power is less than 20dBm. And the channel occupancy time is less than 10ms.
  • PSD Power Spectral Density
  • the transmission power needs to be less than 21 dBm, and for an FHSS system with a channel number of not less than 75, the transmission power can be up to 30 dBm;
  • the PSD is limited to 8dBm/3KHz and the transmit power is not more than 30dBm.
  • US regulations allow broadband and frequency hopping hybrid modes, that is, a device can contain two modes of operation. When operating in broadband mode, it is required to comply with broadband regulations, that is, PSD is limited to 8dBm/3KHz, and transmission power is not more than 30dBm. While working in frequency hopping mode, the transmission power should be less than 21dBm (the number of channels is not less than 15) or 30dBm (the number of channels is not less than 75).
  • the embodiment of the invention provides a method for transmitting data, a network device and a terminal device, which can realize high-speed and reliable communication with wide application.
  • a method of transmitting data comprising:
  • multiple downlink signals are sent to multiple terminal devices on the first frequency band; or, if the transmission opportunity is obtained, the first In a time unit, on the first frequency band, no downlink signal is sent;
  • the broadband transmission is adopted by the downlink, and the data transmission is performed by using the narrowband frequency hopping in the uplink, which not only satisfies the relevant provisions of the spectrum regulations (Europe and the United States).
  • the network equipment has no MU limitation, which increases the downlink transmission opportunity.
  • non-adaptive narrowband frequency hopping is adopted through the uplink, and there is no PSD limitation, which can effectively improve the uplink coverage capability.
  • an uplink signal sent by the first terminal device of the multiple terminal devices including:
  • the receiving, by using the time division multiplexing manner, the uplink signal sent by the at least one terminal device of the multiple terminal devices in the second time unit including:
  • the receiving, by using the time division multiplexing manner, the uplink signal sent by the at least one terminal device of the multiple terminal devices in the second time unit including:
  • the length of the second time unit is greater than a first threshold; wherein, in the second time unit adjacent to the first time unit, on the first sub-band Receiving an uplink signal sent by the first terminal device of the multiple terminal devices, including:
  • the terminal device is determined in a frequency hopping manner in a plurality of sub-bands of the first frequency band, and the second group of second time sub-units are discontinuous in time.
  • an uplink signal sent by the first terminal device of the multiple terminal devices including:
  • the second terminal device determines, according to a frequency hopping manner, a total length of the first group of second time subunits and the second group of second time subgroups in the plurality of subbands of the first frequency band The total length of the cells is less than or equal to the first threshold.
  • sending, in the first frequency band, multiple downlink signals to multiple terminal devices including:
  • the at least one downlink signal includes a primary synchronization signal PSS, The secondary synchronization signal SSS and the physical layer broadcast channel PBCH.
  • the terminal device by synchronizing and broadcasting signals at a fixed frequency, the terminal device is quickly synchronized and the power consumption of the terminal device is reduced.
  • the transmitting, by the one of the multiple sub-bands, the at least one downlink signal of the multiple downlink signals to the multiple terminal devices including:
  • the transmitting, by the one of the multiple sub-bands, the at least one downlink signal of the multiple downlink signals to the multiple terminal devices including:
  • the first terminal device receives the physical downlink shared channel PDSCH and/or the physical downlink control channel PDCCH transmitted by the network device in one of the plurality of sub-bands of the first frequency band in the first time unit.
  • the first terminal device receives the downlink signal sent by the network device in the one of the multiple sub-bands of the first frequency band in the first time unit, including:
  • multiple downlink signals are sent to multiple terminal devices on the first frequency band; or, if the transmission opportunity is obtained, the first In a time unit, on the first frequency band, no downlink signal is sent;
  • a processor configured to determine a transmission opportunity, where the transmission opportunity includes a first time unit on the first frequency band
  • a transceiver for:
  • a fifth aspect provides a terminal device, where the terminal device includes:
  • the transceiver unit is configured to receive, in the first time unit, a downlink signal sent by the network device in one of the multiple sub-bands of the first frequency band;
  • a determining unit configured to determine a first sub-band among the plurality of sub-bands according to a frequency hopping manner
  • the transceiver unit is further configured to send an uplink signal to the network device on the first sub-band in a second time unit adjacent to the first time unit.
  • a determiner configured to determine a first sub-band among the plurality of sub-bands according to a frequency hopping manner
  • the transceiver is further configured to send an uplink signal to the network device on the first sub-band in a second time unit adjacent to the first time unit.
  • a seventh aspect a computer readable storage medium storing a program, the program causing a network device to perform the first aspect or any of the possible implementations of the first aspect method.
  • FIG. 2 is a diagram showing an example of an application scenario of an embodiment of the present invention.
  • 3 is an illustration of an example of a prior art LBT.
  • FIG. 6 is a schematic diagram of a method of transmitting data based on European regulations, in accordance with an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a method of transmitting data based on US regulations, in accordance with an embodiment of the present invention.
  • FIG. 11 is another schematic diagram of a method of transmitting data based on US regulations, in accordance with an embodiment of the present invention.
  • FIG. 13 is a schematic structural block diagram of a network device according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 16 is another schematic structural block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • the terminal device is capable of communicating with the network device.
  • the arrows shown in FIG. 2 may represent uplink/downlink transmissions between the terminal device and the network device.
  • the network device may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station in LTE (Evolutional The Node B, the eNB or the eNodeB, or the base station device in the future 5G network, is not specifically limited in the embodiment of the present invention.
  • BTS Base Transceiver Station
  • NodeB base station
  • LTE Evolutional The Node B, the eNB or the eNodeB, or the base station device in the future 5G network
  • the terminal device may communicate with one or more core networks through a Radio Access Network (RAN), and the terminal device may be referred to as an access terminal and a user.
  • RAN Radio Access Network
  • Device subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the UE may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless communication function.
  • eMTC is an important branch of the Internet of Everything technology. Based on the evolution of the LTE protocol, the LTE protocol has been tailored and optimized to better suit the communication between objects and objects and to reduce costs.
  • eMTC divides LTE broadband into multiple 1.4MHz narrowbands (NBs), which narrowband is used by the network equipment to schedule terminal equipment, each narrowband contains 6 RBs, and each RB occupies 180 kHz bandwidth, including 12 subcarriers with subcarrier spacing of 15 kHz.
  • LBT technology is a commonly used channel estimation technique in order to reduce interference between transmitters.
  • the device before data transmission, the device first performs a CCA operation to measure the energy condition on the current channel. If the measured energy exceeds the threshold, the channel is considered to be occupied, and data cannot be transmitted at this time; If the measured energy is below the threshold, the channel is considered to be idle and data can be transmitted at this time. In this way, time division multiplexing is used to preempt the channels between devices, thereby avoiding mutual interference caused by simultaneously transmitting data.
  • the eMTC scheme is directly applied to the 2.4 GHz unlicensed frequency band.
  • the PSD is not more than 10 dBm/MHz, and the synchronization signal and the broadcast signal in the eMTC scheme cannot satisfy the coverage (MCL) requirement.
  • FHSS frequency hopping
  • the method 200 includes:
  • the network device determines a transmission opportunity, where the transmission opportunity includes a first time unit on the first frequency band, where the first time unit may be any one of the following: a mini time slot, a mini time slot set, a time slot , time slot set, subframe, subframe set, and radio frame.
  • the network device obtains the sending opportunity by using the LBT in the first subframe of the two adjacent radio frames.
  • the network device measures the energy condition on the current channel through the LBT and the CCA, and if the measured energy is lower than the threshold, the channel is considered to be idle, and in the first time unit, in the first frequency band, many The plurality of downlink signals are sent by the at least one terminal device; if the measured energy exceeds the threshold, the channel is considered to be occupied, and the multiple downlink signals are not sent to the multiple or at least one terminal device.
  • the network device when the network device fails to obtain the transmission opportunity, the network device may determine not to send the downlink signal to the terminal device according to the provisions in the protocol, the standard, or the regulation.
  • the network device may determine not to send the downlink signal to the terminal device according to the provisions in the protocol, the standard, or the regulation.
  • embodiments of the invention are not limited thereto.
  • the network device may send downlink signals to multiple terminal devices on one broadband (first frequency band), or may send only one terminal device in one broadband (first frequency band).
  • first frequency band first frequency band
  • first frequency band first frequency band
  • the embodiment of the invention is not specifically limited. In the embodiment of the present invention, a plurality of terminal devices are taken as an example for description.
  • the first frequency band on the first time unit may be used only to send a downlink signal to one terminal device.
  • the PSD is no more than 10 dBm/MHz, and the synchronization channel and the broadcast channel become design bottlenecks.
  • the network device may send at least one downlink signal of the multiple downlink signals to the multiple terminal devices on one of the multiple sub-bands, where the at least one downlink signal may include Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • the first terminal device of the plurality of terminal devices receives at least one of the following signals transmitted by the network device on one of the plurality of sub-bands: a primary synchronization signal (PSS), a secondary synchronization Signal (SSS) and Physical Layer Broadcast Channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization Signal
  • PBCH Physical Layer Broadcast Channel
  • the network device can meet the requirement that the PSD is not greater than 10 dBm/MHz by transmitting at least one downlink signal of the multiple downlink signals to the multiple terminal devices on one sub-band.
  • the network device may send the PSS to the multiple terminal devices on one of the multiple sub-bands; and/or, to one of the multiple sub-bands, to the multiple terminals
  • the device transmits the SSS; and/or transmits the PBCH to the plurality of terminal devices on one of the plurality of sub-bands.
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH are different from each other. Since important channels such as PSS, the SSS, and the PBCH separately occupy one sub-band as a dedicated channel, the coverage capability of the system can be increased.
  • eMTC terminal device capable of supporting 1.08 MHz bandwidth
  • NB-IoT Narrow Band Internet of Things
  • the network device may send the at least one downlink signal to the multiple terminal devices on a physical resource block (PRB) of one of the plurality of sub-bands. That is, the first terminal device can receive the downlink signal sent by the network device on one of the one of the plurality of sub-bands.
  • PRB physical resource block
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH are different from each other. And, the PSS, the SSS, and the PBCH are all sent on one PRB.
  • the network device may send the PSS and the SSS to the multiple terminal devices in a time division multiplexing manner on one of the multiple subbands; and/or, in one of the multiple subbands On the sub-band, the PBCH is sent to the plurality of terminal devices.
  • the sub-band for transmitting the PSS and the sub-band for transmitting the SSS are the same sub-band, and are used for transmitting the PSS and the sub-band of the SSS, and for transmitting the PBCH.
  • the sub-bands are not the same.
  • FIG. 8 is only an exemplary description of the embodiments of the present invention, and the specific protection scope of the embodiments of the present invention is not limited thereto.
  • a sub-band for transmitting the PSS, a sub-band for transmitting the SSS, and a sub-band for transmitting the PBCH are the same sub-band.
  • the location of the sub-band for transmitting the at least one downlink signal may be located in the middle of the first frequency band.
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH occupy an intermediate position of the first frequency band.
  • the PSS, the SSS, and the PBCH respectively occupy two sub-bands in the middle of the first frequency band, and the sub-bands occupied by other signals are distributed on both sides of the two sub-bands.
  • the network device may repeatedly send the at least one downlink signal to the multiple terminal devices in the first time unit.
  • the network device may further send a physical downlink shared channel to the multiple terminal devices by using frequency division multiplexing in the multiple time bands in the first time unit (Physical Downlink Shared Channel). , PDSCH) and/or Physical Downlink Control Channel (PDCCH).
  • a physical downlink shared channel to the multiple terminal devices by using frequency division multiplexing in the multiple time bands in the first time unit (Physical Downlink Shared Channel). , PDSCH) and/or Physical Downlink Control Channel (PDCCH).
  • PDSCH Physical Downlink Shared Channel
  • PDCH Physical Downlink Control Channel
  • the network device may repeatedly send the at least one downlink signal to the multiple terminal devices in the first time unit; in the first time unit, in the first frequency band, in addition to sending the foregoing at least The sub-band outside the sub-band of the downlink signal transmits the PDSCH and/or the PDCCH to the plurality of terminal devices.
  • the network device may repeatedly send the PSS, the SSS, and the PBCH to the multiple terminal devices in the first time unit; in the first time unit, in the first time unit.
  • the PDSCH and/or the PDCCH are transmitted to the plurality of terminal devices in a sub-band except for a sub-band for transmitting the PSS, the SSS, and the PBCH.
  • the transmit power of each downlink signal in the at least one downlink signal is the multiple sub-bands Energy in the range of one sub-band.
  • the transmit power of the PSS, the SSS, and the PBCH are all one of the plurality of sub-bands. Energy within the range.
  • the PSD cannot be greater than 8dBm/3kHz. It is estimated that the power of 10dBm can be filled in the 1.08MHz bandwidth, so there is no PSD limitation.
  • the network device may send at least one downlink signal of the multiple downlink signals to the multiple terminal devices on one of the multiple sub-bands, where the at least one downlink signal may include Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • the first terminal device of the plurality of terminal devices receives at least one of the following signals transmitted by the network device on one of the plurality of sub-bands: a primary synchronization signal (PSS), a secondary synchronization Signal (SSS) and Physical Layer Broadcast Channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization Signal
  • PBCH Physical Layer Broadcast Channel
  • eMTC terminal device capable of supporting 1.08 MHz bandwidth
  • NB-IoT Narrow Band Internet of Things
  • the network device may send the PSS to the multiple terminal devices on one of the multiple sub-bands; and/or, to one of the multiple sub-bands, to the multiple terminals
  • the device transmits the SSS; and/or transmits the PBCH to the plurality of terminal devices on one of the plurality of sub-bands.
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH are different from each other. Since the important channels such as the PSS, the PSS, and the PBCH separately occupy one sub-band as a dedicated channel, the coverage capability of the system can be increased.
  • the network device may send the at least one downlink signal to the multiple terminal devices on a physical resource block (PRB) of one of the plurality of sub-bands. That is, the first terminal device can receive the downlink signal sent by the network device on one of the one of the plurality of sub-bands.
  • PRB physical resource block
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH are different from each other. And, the PSS, the SSS, and the PBCH are all sent on one PRB.
  • the network device may send the PSS and the SSS to the multiple terminal devices in a time division multiplexing manner on one of the multiple subbands; and/or, in one of the multiple subbands On the sub-band, the PBCH is sent to the plurality of terminal devices.
  • the sub-band for transmitting the PSS and the sub-band for transmitting the SSS are the same sub-band, and are used for transmitting the PSS and the sub-band of the SSS, and for transmitting the PBCH.
  • the sub-bands are not the same.
  • FIG. 11 is only an exemplary description of the embodiments of the present invention, and the specific protection scope of the embodiments of the present invention is not limited thereto.
  • a sub-band for transmitting the PSS, a sub-band for transmitting the SSS, and a sub-band for transmitting the PBCH are the same sub-band.
  • the location of the sub-band for transmitting the at least one downlink signal may be located in the middle of the first frequency band.
  • the sub-band for transmitting the PSS, the sub-band for transmitting the SSS, and the sub-band for transmitting the PBCH occupy an intermediate position of the first frequency band.
  • the PSS, the SSS, and the PBCH respectively occupy three sub-bands in the middle of the first frequency band, and the sub-bands occupied by other signals are distributed on both sides of the three sub-bands.
  • the PSS, the SSS, and the PBCH respectively occupy two sub-bands in the middle of the first frequency band, and the sub-bands occupied by other signals are distributed on both sides of the two sub-bands.
  • the network device may repeatedly send the at least one downlink signal to the multiple terminal devices in the first time unit.
  • the network device may further send a physical downlink shared channel to the multiple terminal devices by using frequency division multiplexing in the multiple time bands in the first time unit (Physical Downlink Shared Channel). , PDSCH) and/or Physical Downlink Control Channel (PDCCH).
  • a physical downlink shared channel to the multiple terminal devices by using frequency division multiplexing in the multiple time bands in the first time unit (Physical Downlink Shared Channel). , PDSCH) and/or Physical Downlink Control Channel (PDCCH).
  • PDSCH Physical Downlink Shared Channel
  • PDCH Physical Downlink Control Channel
  • the network device may repeatedly send the at least one downlink signal to the multiple terminal devices in a first first time subunit of the first time unit, where the starting time of the first time unit is The start time of the first first time subunit is the same; the network device may be in the first time subunit except the first first time subunit in the first time unit, on the first frequency band Transmitting the PDSCH and/or the PDCCH to the plurality of terminal devices.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programming logic devices, transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Connection Dynamic Random Access Memory Synchronous Connection Dynamic Random Access Memory
  • SLDRAM Synchronous Connection Dynamic Random Access Memory
  • DR RAM direct memory bus random access memory

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Abstract

Des modes de réalisation de la présente invention concernent un procédé de transmission de données, un dispositif réseau et un dispositif terminal. Le procédé consiste : à déterminer une opportunité de transmission, l'opportunité de transmission comprenant une première unité de temps sur une première bande de fréquence ; si l'opportunité de transmission est obtenue avec succès, à émettre des types de signaux de liaison descendante multiples à des dispositifs terminaux multiples sur la première bande de fréquence dans la première unité de temps ; en variante, si l'opportunité de transmission n'est pas obtenue avec succès, à n'émettre aucun signal de liaison descendante dans la première unité de temps ; à recevoir un signal de liaison montante émis par un premier dispositif terminal parmi les dispositifs terminaux multiples sur une première sous-bande de fréquence dans une seconde unité de temps à côté de la première unité de temps, la première sous-bande de fréquence étant déterminée par le premier dispositif terminal dans un mode de saut de fréquence dans des sous-bandes de fréquence multiples de la première bande de fréquence. Par l'utilisation d'une large bande pour la liaison descendante et d'un saut de fréquence à bande étroite pour la liaison montante, le procédé de transmission de données dans les modes de réalisation de la présente invention permet d'effectuer efficacement une communication en fonction de lois et de règlements de différents pays.
PCT/CN2017/080171 2017-04-11 2017-04-11 Procédé de transmission de données, dispositif réseau et dispositif terminal WO2018187947A1 (fr)

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PCT/CN2017/080171 WO2018187947A1 (fr) 2017-04-11 2017-04-11 Procédé de transmission de données, dispositif réseau et dispositif terminal
CN201780088889.5A CN110447174B (zh) 2017-04-11 2017-04-11 传输数据的方法、网络设备和终端设备

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CN112583511B (zh) * 2020-12-06 2024-03-29 广州技象科技有限公司 基于相同时隙传输的组网方法、装置、设备和存储介质

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EP2541796B1 (fr) * 2010-02-23 2018-10-10 LG Electronics Inc. Procédé et dispositif destinés à fournir des informations de commande pour une transmission en liaison montante dans un système de communication sans fil supportant une transmission en liaison montante à antennes multiples
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CN1819489A (zh) * 2005-02-07 2006-08-16 上海贝尔阿尔卡特股份有限公司 传输信号的方法及实现该方法的蜂窝系统
CN101242239A (zh) * 2007-02-09 2008-08-13 大唐移动通信设备有限公司 实现上行跳频传输的方法、系统和终端
JP2014110530A (ja) * 2012-12-03 2014-06-12 Fujitsu Ltd 送信装置、受信装置、無線通信システム、及びプログラム

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