WO2016161601A1 - 一种数据重传方法、设备及系统 - Google Patents

一种数据重传方法、设备及系统 Download PDF

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Publication number
WO2016161601A1
WO2016161601A1 PCT/CN2015/076174 CN2015076174W WO2016161601A1 WO 2016161601 A1 WO2016161601 A1 WO 2016161601A1 CN 2015076174 W CN2015076174 W CN 2015076174W WO 2016161601 A1 WO2016161601 A1 WO 2016161601A1
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WIPO (PCT)
Prior art keywords
carrier
data
status information
control signaling
further configured
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.)
Ceased
Application number
PCT/CN2015/076174
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English (en)
French (fr)
Inventor
王达
王键
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP15888158.1A priority Critical patent/EP3267611B1/en
Priority to PCT/CN2015/076174 priority patent/WO2016161601A1/zh
Priority to CN201580059883.6A priority patent/CN107005369B/zh
Priority to US15/565,356 priority patent/US10419166B2/en
Publication of WO2016161601A1 publication Critical patent/WO2016161601A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a data retransmission method, device, and system.
  • each device needs to use frequency resources for information transmission, and the frequency resources are also called spectrum.
  • the spectrum can be divided into licensed spectrum and unlicensed spectrum.
  • the licensed spectrum is a frequency resource exclusive to some operators, and the unlicensed spectrum is a common frequency resource in a wireless communication network.
  • the carrier on the licensed spectrum is called the authorized carrier, and the carrier on the unlicensed spectrum is called the unlicensed carrier.
  • HARQ Hybrid Automatic Repeat Request
  • the second device feeds back an ACK/NACK (Acknowledgement/Negative Acknowledgement) message to the first device, where the first device determines according to the feedback information of the second device. Whether to transmit this data to the second device again, if necessary, the data will be sent again, such that the process of data transmission is a HARQ process.
  • ACK/NACK Acknowledgement/Negative Acknowledgement
  • LAA-LTE Licensed Assisted Access Using Long Term Evolution
  • the transmitting device when a transmitting device uses an unlicensed carrier to transmit data, the transmitting device cannot occupy the channel all the time, and the transmitting device occupies an unlicensed carrier. After the time, the channel needs to be re-occupied, which will cause the retransmission of the HARQ to be interrupted.
  • the receiving end can only wait for the transmitting device to preempt the channel and then receive the data again. How to implement the HARQ retransmission of the unlicensed carrier becomes an urgent problem to be solved.
  • the embodiment of the present invention provides a data retransmission method, device, and system, which can solve the problem that the data cannot be retransmitted due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data in the prior art.
  • an embodiment of the present invention provides a data retransmission method, including:
  • the first device transmits data to the second device by using the first carrier, where the first carrier is an unlicensed carrier;
  • the first device When the first carrier is unavailable, the first device retransmits the data to the second device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the method further includes:
  • the first device sends control signaling to the second device, where the control signaling is used to indicate the data.
  • the sending, by the first device, the control signaling to the second device includes:
  • the first device sends control signaling to the second device by using the second carrier.
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the acquiring, by the first device, status information of the first carrier includes:
  • the first device acquires the status information of the first carrier by using the second device, acquiring the third device, or acquiring the status information of the first carrier by using the pre-configuration information.
  • the method further includes:
  • the first device sends status information of the first carrier to the second device.
  • the sending, by the first device, the status information of the first carrier to the second device includes:
  • the first device sends the state information of the first carrier to the second device by using the first carrier or the second carrier.
  • the second carrier is an authorized carrier or an unauthorized Carrier.
  • an embodiment of the present invention provides a data retransmission method, including:
  • the second device receives data transmitted by the first device using the first carrier, where the first carrier is an unlicensed carrier;
  • the second device When the first carrier is unavailable, the second device receives the data retransmitted by the first device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the method further includes:
  • the second device receives control signaling sent by the first device, where the control signaling is used to indicate the data.
  • the receiving, by the second device, the control signaling sent by the first device includes:
  • the second device receives the control signaling sent by the first device by using the second carrier.
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the second device acquires the first carrier Status information includes:
  • the second device acquires the status information of the first carrier by using the first device, obtaining the third device, or acquiring the status information of the first carrier by using the pre-configuration information.
  • the acquiring, by the first device, the status information of the first carrier by using the first device includes:
  • the second device receives status information of the first carrier that is sent by the first device.
  • the second device receives a status information packet of the first carrier that is sent by the first device include:
  • the second device uses the first carrier or the second carrier to receive status information of the first carrier that is sent by the first device.
  • the second carrier is an authorized carrier or an unlicensed carrier.
  • a first device of the embodiment of the present invention includes:
  • a sending unit configured to transmit data to the second device by using the first carrier, where the first carrier is an unlicensed carrier;
  • An acquiring unit configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available;
  • a retransmission unit configured to retransmit the data to the second device by using a second carrier when the first carrier is unavailable, where the first carrier and the second carrier are different carriers.
  • the sending unit is further configured to send control signaling to the second device, where the control signaling is used to indicate the data.
  • the sending unit is further configured to send control signaling to the second device by using the second carrier.
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the acquiring unit is further configured to acquire the status information of the first carrier by using the second device, obtaining the third device, or acquiring the status information of the first carrier by using the pre-configuration information.
  • the sending unit is further configured to send status information of the first carrier to the second device.
  • the sending unit is further configured to send, by using the first carrier or the second carrier, status information of the first carrier to the second device.
  • an embodiment of the present invention provides a second device, including:
  • a first receiving unit configured to receive data that is transmitted by the first device by using the first carrier, where the first carrier is an unlicensed carrier;
  • An acquiring unit configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available;
  • a second receiving unit configured to receive, by using the second carrier, the data that is retransmitted by the first device when the first carrier is unavailable, where the first carrier and the second carrier are different carriers.
  • the device further includes:
  • a third receiving unit configured to receive control signaling sent by the first device, where the control signaling is used to indicate the data.
  • the third receiving unit is further configured to receive, by using the second carrier, control signaling sent by the first device.
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the acquiring unit is further configured to acquire the status information of the first carrier by using the first device, acquiring by the third device, or acquiring the first carrier by using the pre-configuration information.
  • the acquiring unit is further configured to receive status information of the first carrier that is sent by the first device.
  • the acquiring unit is further configured to receive, by using the first carrier or the second carrier, state information of the first carrier that is sent by the first device.
  • an embodiment of the present invention provides a first device, including: a processor, a memory, a bus, and a transmitter, where the processor, the memory, and the transmitter are connected and communicate with each other through the bus;
  • the transmitter is configured to transmit data to the second device by using the first carrier, where the first carrier is an unlicensed carrier;
  • the processor is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available;
  • the transmitter is further configured to: when the first carrier is unavailable, retransmit the data to the second device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the transmitter is further configured to send control signaling to the second device, where the control signaling is used to indicate the data.
  • the transmitter is further configured to send the control signaling to the second device by using the second carrier .
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the processor is further configured to actively acquire and pass the The second device acquires, acquires, or acquires state information of the first carrier by using a third-party device.
  • the transmitter is further configured to The second device sends status information of the first carrier.
  • the transmitter is further configured to send the second carrier to the second device by using the first carrier or the second carrier Sending status information of the first carrier.
  • an embodiment of the present invention provides a second device, including: a processor, a memory, a bus, and a receiver, where the processor, the memory, and the receiver are connected and communicate with each other through the bus;
  • the receiver is configured to receive data that is transmitted by the first device by using a first carrier, where the first carrier is an unlicensed carrier;
  • the processor is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available;
  • the receiver is further configured to: when the first carrier is unavailable, receive the data that is retransmitted by the first device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the receiver is further configured to receive control signaling sent by the first device, where the control signaling is used to indicate the data .
  • the receiver is further configured to receive, by using the second carrier, a control message sent by the first device make.
  • the control signaling includes a carrier indication field CIF, and the carrier indication field CIF is used to indicate the data.
  • the processor is further configured to acquire the status information of the first carrier by using the first device, obtaining by the third device, or acquiring the first carrier by using the pre-configuration information.
  • the processor is further configured to receive status information of the first carrier that is sent by the first device.
  • the processor is further configured to receive, by using the first carrier or the second carrier, status information of the first carrier that is sent by the first device.
  • a seventh aspect of the present invention provides a wireless communication system, including: a first device and a second device;
  • the first device is the first device described in the third aspect or any one of the possible implementation manners of the third aspect, where the second device is any one of the fourth aspect or the fourth aspect a second device as described in the implementation manner;
  • first device is the first device described in any one of the possible implementation manners of the fifth aspect or the fifth device, where the second device is any one of the sixth aspect or the sixth aspect The second device described in the implementation.
  • the first device uses the first carrier to transmit data to the second device, where the first carrier is an unlicensed carrier, and the first device acquires the first Status information of the carrier, the status information is used to determine whether the first carrier is available; when the first carrier is unavailable, the first device uses the second carrier to retransmit the data to the second device,
  • the first carrier and the second carrier are different carriers.
  • FIG. 1 is a schematic flowchart of a data retransmission method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a data retransmission method according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a second device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a first device according to another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a second device according to another embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the first device or the second device includes but is not limited to a user equipment (English name: User Equipment, English abbreviation: UE), and a mobile station (English full name: Mobile Station, English abbreviation: MS) Mobile terminal, mobile telephone, handset, and portable equipment.
  • the user equipment can access the radio access network (English name: Radio Access Network, English abbreviation: RAN) Communicating with one or more core networks, for example, the user equipment may be a mobile phone (or "cellular" phone), a computer with wireless communication capabilities, etc., and the user device may also be portable, pocket, handheld, computer Built-in or in-vehicle mobile device.
  • the first device or the second device may be a base station in GSM or CDMA (English full name: Base Transceiver Station, English abbreviation: BTS), or may be a base station (NodeB) in WCDMA, or may be LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • the embodiment of the present invention is not limited to the evolved base station (English name: evolved Node B, English abbreviation: eNB or e-NodeB).
  • the data transmission method provided by the embodiment of the present invention is applicable to a wireless communication system, and the embodiment of the present invention is applied to the LTE/LTE-A wireless communication system as an example for analysis and description, and does not constitute a limitation of the present invention. .
  • the second device when the first device is a Global System of Mobile communication (GSM) system, a base station (BTS, Base Transceiver Station) in a code division multiple access (CDMA) system, and a broadband
  • GSM Global System of Mobile communication
  • BTS Base Transceiver Station
  • CDMA code division multiple access
  • WCDMA code division multiple access
  • the second device may be a user equipment (UE, including but not limited to a mobile station).
  • UE user equipment
  • the first device can pass through the Radio Access Network (RAN) Communicating with one or more core networks
  • the second device may be a mobile phone (or "cellular" phone), a computer with wireless communication capabilities, etc., and the second device may also be portable, pocket, handheld , a computer built-in or in-vehicle mobile device.
  • the first device is a user equipment
  • the second device may be a base station.
  • the first device is a user device
  • the second device may also be a user device, and the second device may be a receiving device that receives data from the first device.
  • the embodiment of the present invention provides a data retransmission method, which is preferably applied to a LAA-LTE (Licensed Assisted Access Using Long Term Evolution) system or an LTE (Long Term Evolution) system. As shown in Figure 1, the following steps are included:
  • the first device transmits data to the second device by using the first carrier.
  • the first carrier is an unlicensed carrier.
  • the first device acquires state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the status information of the first carrier includes available and unavailable. If the LAA-LTE device occupies the unlicensed carrier to send data, it indicates that the status of the device on the unlicensed carrier is available, marked as on, if LAA-LTE The device does not occupy the unlicensed carrier to send data, indicating that the device is unavailable on this unlicensed carrier and is marked as off.
  • the first device uses the second carrier to the second The device retransmits the data, where the first carrier and the second carrier are different carriers.
  • the first device cannot reoccupy the unlicensed carrier after the first device occupies the unlicensed carrier for a certain period of time, that is, when the first device cannot retransmit the data on the first carrier, The data is retransmitted on the second carrier.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the method further includes:
  • the first device sends control signaling to the second device, where the control signaling is used to indicate the data.
  • the sending, by the first device, the control signaling to the second device includes:
  • the first device sends control signaling to the second device by using the second carrier.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. It is necessary to continue to receive HARQ retransmission data on the unlicensed carrier numbered 2 at the corresponding location on the authorized carrier.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device receives the first carrier transmitted on the second carrier.
  • the DCI can be demodulated and decoded according to the same DCI length, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and there is no need to blindly detect the length of the DCI.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • a CIF field is used, and a CIF field in the DCI signaling is used to indicate the data.
  • the acquiring, by the first device, status information of the first carrier includes:
  • the first device acquires the status information of the first carrier by using the second device, acquiring the third device, or acquiring the status information of the first carrier by using the pre-configuration information.
  • the method further includes:
  • the first device sends status information of the first carrier to the second device.
  • the sending, by the first device, the status information of the first carrier to the second device includes:
  • the first device sends the state information of the first carrier to the second device by using the first carrier or the second carrier.
  • the first device may transmit corresponding information by using a licensed carrier, such as a PBCH (Physical Broadcast Channel), notify all receiving ends, or may be on the first carrier by the first device.
  • a licensed carrier such as a PBCH (Physical Broadcast Channel)
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RRC Radio Resource Control
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the first device uses the first carrier to transmit data to the second device, where the first carrier is an unlicensed carrier, and the first device acquires state information of the first carrier.
  • the state information is used to determine whether the first carrier is available; when the first carrier is unavailable, the first device uses a second carrier to retransmit the data to the second device, the first carrier and The second carrier is a different carrier.
  • FIG. 1 Another embodiment of the present invention provides a data retransmission method, corresponding to the receiving side of the data retransmission method described in the embodiment shown in FIG. 1, preferably, applied to a LAA-LTE system or an LTE system, and is referred to FIG. Show, including the following steps:
  • the second device receives data that is transmitted by the first device by using the first carrier.
  • the first carrier is an unlicensed carrier.
  • the second device acquires state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the status information of the first carrier includes available and unavailable. If the LAA-LTE device occupies the unlicensed carrier to send data, it indicates that the status of the device on the unlicensed carrier is available, marked as on, if LAA-LTE The device does not occupy the unlicensed carrier to send data, indicating that the device is unavailable on this unlicensed carrier and is marked as off.
  • the second device uses the second carrier to receive the data that is retransmitted by the second device, where the first carrier and the second carrier are different carriers.
  • the first device cannot reoccupy the unlicensed carrier after the first device occupies the unlicensed carrier for a certain period of time, that is, when the first device cannot retransmit the data on the first carrier, The data is retransmitted on the second carrier.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the method further includes:
  • the second device receives control signaling sent by the first device, where the control signaling is used to indicate the data.
  • the receiving, by the second device, the control signaling sent by the first device includes:
  • the second device receives, by using the second carrier, a control signal sent by the first device make.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. It is necessary to continue to receive HARQ retransmission data on the unlicensed carrier numbered 2 at the corresponding location on the authorized carrier.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device can follow the same when receiving the cross-carrier transmission HARQ data of the first carrier transmitted on the second carrier and the data of the local carrier transmitted on the second carrier or the HARQ retransmission data of the local carrier.
  • the DCI length demodulates and decodes the DCI, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and the DCI length does not need to be blindly detected.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • the CIF field in DCI signaling is used to indicate the data.
  • the acquiring, by the second device, status information of the first carrier includes:
  • the second device acquires the status information of the first carrier by using the first device, obtaining the third device, or acquiring the status information of the first carrier by using the pre-configuration information.
  • the acquiring, by the second device, status information of the first carrier by using the first device includes:
  • the second device receives status information of the first carrier that is sent by the first device.
  • the receiving, by the second device, status information of the first carrier sent by the first device includes:
  • the second device uses the first carrier or the second carrier to receive status information of the first carrier that is sent by the first device.
  • the first device may transmit corresponding information by using a licensed carrier, such as a PBCH (Physical Broadcast Channel), notify all receiving ends, or may be on the first carrier by the first device.
  • a licensed carrier such as a PBCH (Physical Broadcast Channel)
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RRC Radio Resource Control
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the second device receives data that is transmitted by the first device by using the first carrier, where the first carrier is an unlicensed carrier, and the second device acquires state information of the first carrier, The status information is used to determine whether the first carrier is available; when the first carrier is unavailable, the second device uses the second carrier to receive the data retransmitted by the first device, the first The carrier and the second carrier are different carriers.
  • the problem that the device fails to perform data retransmission due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data is solved.
  • the embodiment of the present invention provides a first device, which is used to perform the data retransmission method described in the foregoing embodiment corresponding to FIG. 1, and is preferably applied to a LAA-LTE system or LTE.
  • the first device may be a base station or a user equipment.
  • the first device 30 includes a sending unit 301, an obtaining unit 302, and a retransmission unit 303.
  • the sending unit 301 is configured to use the first carrier to transmit data to the second device.
  • the first carrier is an unlicensed carrier.
  • the acquiring unit 302 is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the status information of the first carrier includes available and unavailable. If the LAA-LTE device occupies the unlicensed carrier to send data, it indicates that the status of the device on the unlicensed carrier is available, marked as on, if LAA-LTE The device does not occupy the unlicensed carrier to send data, indicating that the device is unavailable on this unlicensed carrier and is marked as off.
  • the retransmission unit 303 is configured to retransmit the data to the second device by using a second carrier when the first carrier is unavailable, where the first carrier and the second carrier are different carriers.
  • the first device cannot reoccupy the unlicensed carrier after the first device occupies the unlicensed carrier for a certain period of time, that is, when the first device cannot retransmit the data on the first carrier, The data is retransmitted on the second carrier.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the sending unit 301 is further configured to send control signaling to the second device, where the control signaling is used to indicate the data.
  • the sending unit 301 is further configured to send, by using the second carrier, control signaling to the second device.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. It is necessary to continue to receive HARQ retransmission data on the unlicensed carrier numbered 2 at the corresponding location on the authorized carrier.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device can follow the same when receiving the cross-carrier transmission HARQ data of the first carrier transmitted on the second carrier and the data of the local carrier transmitted on the second carrier or the HARQ retransmission data of the local carrier.
  • the DCI length demodulates and decodes the DCI, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and the DCI length does not need to be blindly detected.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • a CIF field is used, and a CIF field in the DCI signaling is used to indicate the data.
  • the acquiring unit 302 is further configured to acquire, obtain, obtain, or acquire, by using a second device, status information of the first carrier by using a second device.
  • the sending unit 301 is further configured to send status information of the first carrier to the second device.
  • the sending unit 301 is further configured to send status information of the first carrier to the second device by using the first carrier or the second carrier.
  • the sending unit 301 can pass an authorized carrier, for example, PBCH (Physical) Broadcast Channel (Physical Broadcast Channel) transmits corresponding information, notifies all receiving ends, or may pass the PDCCH (Physical Downlink Control Channel) on the corresponding authorized carrier when the on-off state of the first carrier changes on the first carrier.
  • PBCH Physical
  • Physical Broadcast Channel Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • the physical downlink control channel or the PUCCH (Physical Uplink Control Channel) or the RRC (Radio Resource Control) signaling notifies the receiving end that the on-off state of the first carrier changes.
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the first device uses the first carrier to transmit data to the second device, where the first carrier is an unlicensed carrier, and acquires state information of the first carrier, where the state information is used to determine the Whether a carrier is available; when the first carrier is unavailable, the data is retransmitted to the second device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the problem that the device fails to perform data retransmission due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data is solved.
  • the embodiment of the present invention provides a second device, which is used to perform the data retransmission method described in the foregoing embodiment corresponding to FIG. 2, and is preferably applied to a LAA-LTE system or LTE.
  • the second device may be a base station or a user equipment.
  • the second device 40 includes a first receiving unit 401, an obtaining unit 402, and a second receiving unit 403.
  • the first receiving unit 401 is configured to receive data that is transmitted by the first device by using the first carrier.
  • the first carrier is an unlicensed carrier.
  • the obtaining unit 402 is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the status information of the first carrier includes available and unavailable. If the LAA-LTE device occupies the unlicensed carrier to send data, it indicates that the status of the device on the unlicensed carrier is available, marked as on, if LAA-LTE The device does not occupy the unlicensed carrier to send data, indicating that the device is unavailable on this unlicensed carrier and is marked as off.
  • a second receiving unit 403 configured to use a second carrier when the first carrier is unavailable Receiving the data retransmitted by the first device, where the first carrier and the second carrier are different carriers.
  • the first device cannot reoccupy the unlicensed carrier after the first device occupies the unlicensed carrier for a certain period of time, that is, when the first device cannot retransmit the data on the first carrier, The data is retransmitted on the second carrier.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the device further includes:
  • a third receiving unit configured to receive control signaling sent by the first device, where the control signaling is used to indicate the data.
  • the third receiving unit is further configured to receive, by using the second carrier, control signaling sent by the first device.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. It is necessary to continue to receive HARQ retransmission data on the unlicensed carrier numbered 2 at the corresponding location on the authorized carrier.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device can follow the same when receiving the cross-carrier transmission HARQ data of the first carrier transmitted on the second carrier and the data of the local carrier transmitted on the second carrier or the HARQ retransmission data of the local carrier.
  • the DCI length demodulates and decodes the DCI, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and the DCI length does not need to be blindly detected.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • a CIF field is used, and a CIF field in the DCI signaling is used to indicate the data.
  • the obtaining unit 402 is further configured to acquire the status information of the first carrier by using the first device, obtaining by the third device, or acquiring the first carrier by using the pre-configuration information.
  • the acquiring unit 402 is further configured to receive status information of the first carrier that is sent by the first device.
  • the obtaining unit 402 is further configured to receive, by using the first carrier or the second carrier, state information of the first carrier that is sent by the first device.
  • the first device may transmit corresponding information by using a licensed carrier, such as a PBCH (Physical Broadcast Channel), notify all receiving ends, or may be on the first carrier by the first device.
  • a licensed carrier such as a PBCH (Physical Broadcast Channel)
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RRC Radio Resource Control
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the second device receives the number of transmissions by the first device using the first carrier
  • the first carrier is an unlicensed carrier; the state information of the first carrier is obtained, the state information is used to determine whether the first carrier is available; when the first carrier is unavailable, the second carrier is used to receive
  • the data retransmitted by the first device, the first carrier and the second carrier are different carriers.
  • the first device 50 includes: at least one processor 501, a memory 502, a bus 503, and a transmitter 504, the at least one The processor 501, the memory 502, and the transmitter 504 are connected by a bus 503 and complete communication with each other.
  • the bus 503 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component) bus, or an EISA (Extended Industry Standard Architecture) bus.
  • the bus 503 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 5, but it does not mean that there is only one bus or one type of bus. among them:
  • the memory 502 is used to execute the application code of the inventive scheme, and the application code for executing the inventive scheme is stored in the memory 502 and controlled by the processor 501 for execution.
  • the memory 502 can be a read only memory ROM or other type of static storage device that can store static information and instructions, a random access memory RAM or other type of dynamic storage device that can store information and instructions, or can be electrically erasable.
  • These memories are connected to the processor via a bus.
  • the processor 501 may be a central processing unit (CPU) or a specific integrated circuit (Application Specific Integrated). Circuit, abbreviated as ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
  • CPU central processing unit
  • ASIC Application Specific Integrated
  • the processor 501 is configured to call the program code in the memory 502. In a possible implementation manner, when the application program is executed by the processor 501, the following functions are implemented.
  • the transmitter 504 is configured to transmit data to the second device by using the first carrier, where the first carrier is an unlicensed carrier.
  • the processor 501 is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the transmitter 504 is further configured to: when the first carrier is unavailable, retransmit the data to the second device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the transmitter 504 is further configured to send control signaling to the second device, where the control signaling is used to indicate the data.
  • the transmitter 504 is further configured to send control signaling to the second device by using the second carrier.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. Need to continue on the authorized carrier
  • the HARQ retransmission data on the unlicensed carrier numbered 2 shall be received at the location.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device can follow the same when receiving the cross-carrier transmission HARQ data of the first carrier transmitted on the second carrier and the data of the local carrier transmitted on the second carrier or the HARQ retransmission data of the local carrier.
  • the DCI length demodulates and decodes the DCI, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and the DCI length does not need to be blindly detected.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • a CIF field is used, and a CIF field in the DCI signaling is used to indicate the data.
  • the processor 501 is further configured to acquire, obtain, obtain, or acquire, by using the second device, status information of the first carrier by using the second device.
  • the transmitter 504 is further configured to send status information of the first carrier to the second device.
  • the transmitter 504 is further configured to send status information of the first carrier to the second device by using the first carrier or the second carrier.
  • the transmitter 504 may transmit corresponding information by using an authorized carrier, such as a PBCH (Physical Broadcast Channel), to notify all receiving ends, or may be on the first carrier by the first device.
  • a PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RRC Radio Resource Control
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the first device uses the first carrier to transmit data to the second device, where the first carrier is an unlicensed carrier, and acquires state information of the first carrier, where the state information is used to determine the Whether a carrier is available; when the first carrier is unavailable, the data is retransmitted to the second device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the problem that the device fails to perform data retransmission due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data is solved.
  • another embodiment of the present invention provides a second device, which is used to perform the data retransmission method described in the foregoing embodiment corresponding to FIG. 2, and is preferably applied to the LAA-LTE system.
  • the second device may be a base station or a user equipment.
  • the second device 60 includes at least one processor 601, a memory 602, a bus 603, and a receiver 604.
  • the at least one processing The 601, the memory 602 and the receiver 604 are connected by a bus 603 and complete communication with each other.
  • the bus 603 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component) bus, or an EISA (Extended Industry Standard Architecture) bus.
  • the bus 603 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus. among them:
  • the memory 602 is used to execute the application code of the inventive scheme, and the application code for executing the inventive scheme is stored in a memory and controlled by the processor 601 for execution.
  • the memory can be a read only memory ROM or other type of static storage device that can store static information and instructions, a random access memory RAM or other type of dynamic storage device that can store information and instructions, or can be electrically erasable or programmable.
  • These memories are connected to the processor via a bus.
  • the processor 601 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. Integrated circuits.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the processor 601 is configured to call the program code in the memory 602. In a possible implementation manner, when the application program is executed by the processor 601, the following functions are implemented.
  • the receiver 604 is configured to receive data that is transmitted by the first device by using the first carrier, where the first carrier is an unlicensed carrier;
  • the processor 601 is configured to acquire state information of the first carrier, where the state information is used to determine whether the first carrier is available.
  • the receiver 604 is further configured to: when the first carrier is unavailable, receive the data that is retransmitted by the first device by using a second carrier, where the first carrier and the second carrier are different carriers.
  • the second carrier may be an authorized carrier or an unlicensed carrier.
  • the receiver 604 is further configured to receive control signaling sent by the first device, where the control signaling is used to indicate the data.
  • the receiver 604 is further configured to receive, by using the second carrier, control signaling sent by the first device.
  • control signaling includes a CIF (Carrier Indicator Field), where the carrier indication field CIF is used to indicate the data.
  • CIF Carrier Indicator Field
  • the CIF is used to indicate a number of the first carrier that transmits the data, that is, which carrier the data is from.
  • the receiving device if the receiving device knows that the unlicensed carrier numbered 2 is in the off state, that is, the corresponding sending device does not occupy the unlicensed carrier number 2, the receiving device receives the data on the authorized carrier.
  • DCI Downlink Control Information
  • CIF Downlink Control Information
  • the receiver After receiving the DCI information, the receiver receives the DCI information. It is necessary to continue to receive HARQ retransmission data on the unlicensed carrier numbered 2 at the corresponding location on the authorized carrier.
  • the NDI (New Data Indicator) information in the DCI at this time can be used to indicate that the data is a HARQ retransmission packet.
  • the corresponding CIF field may be omitted in the DCI for indicating the data, or the CIF field may not be omitted.
  • the value of CIF is the carrier number of the second carrier.
  • the advantage of not omitting the CIF field is that the receiving device can follow the same when receiving the cross-carrier transmission HARQ data of the first carrier transmitted on the second carrier and the data of the local carrier transmitted on the second carrier or the HARQ retransmission data of the local carrier.
  • the DCI length demodulates and decodes the DCI, which does not confuse the understanding of the DCI length.
  • the behavior of the receiving device is relatively simple, and the DCI length does not need to be blindly detected.
  • the HARQ retransmission packet is transmitted on the first carrier, and the receiving device receives the HARQ retransmission packet of the carrier on the first carrier, and the second There is no cross-carrier transmission on the carrier.
  • the carrier data or the HARQ retransmission data of the local carrier is transmitted on the first carrier or the second carrier, the corresponding CIF field may be omitted in the DCI for indicating the data.
  • a CIF field is used, and a CIF field in the DCI signaling is used to indicate the data.
  • the processor 601 is further configured to acquire the status information of the first carrier by using the first device, acquiring by the third device, or acquiring the first carrier by using the pre-configuration information.
  • the processor 601 is further configured to receive status information of the first carrier that is sent by the first device.
  • the processor 601 is further configured to receive, by using the first carrier or the second carrier, status information of the first carrier that is sent by the first device.
  • the first device may transmit corresponding information by using an authorized carrier, such as a PBCH (Physical Broadcast Channel), notify all receiving ends, or may pass the a PDCCH (Physical Downlink Control Channel) or a PUCCH (Physical Uplink Control Channel) on the corresponding licensed carrier when the on-off state of the first carrier is changed on the first carrier or
  • the RRC Radio Resource Control
  • the on-off state of the first device on the first carrier may also notify all the receiving ends by transmitting the corresponding information by using the first carrier, and may specifically change the on-off state on the first carrier. And corresponding to the PDCCH or PUCCH or RRC signaling on the first carrier, to notify the receiving end that the on-off state of the first carrier changes.
  • the second device receives data that is transmitted by the first device by using the first carrier, where the first carrier is an unlicensed carrier, and acquires state information of the first carrier, where the state information is used to determine the Whether the first carrier is available; when the first carrier is unavailable, the second carrier is used to receive the data retransmitted by the first device, where the first carrier and the second carrier are different carriers.
  • the problem that the device fails to perform data retransmission due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data is solved.
  • the embodiment of the present invention provides a wireless communication system for performing the data retransmission method described in the foregoing embodiments corresponding to FIG. 1 and FIG. 2, which is preferably applied to the foregoing embodiments.
  • the wireless communication system 70 includes a first device 701 and a second device 702.
  • the first device 701 is the first device described in the embodiment corresponding to FIG. 3, and the second device 702 is the first device described in the embodiment corresponding to FIG. 4.
  • the first device 701 is the first device described in the embodiment corresponding to FIG. 5, and the second device 702 is the first device described in the embodiment corresponding to FIG. 6.
  • the first device may be a base station
  • the second device may be a user equipment
  • the first device is a user equipment
  • the second device is a base station
  • the first device uses the first carrier to transmit data to the second device, where the first carrier is an unlicensed carrier, and the first device acquires state information of the first carrier, The status information is used to determine whether the first carrier is available; when the first carrier is unavailable, the first device uses the second carrier to Transmitting the data, the first carrier and the second carrier are different carriers.
  • the problem that the device fails to perform data retransmission due to the need to re-empt the channel when the device uses the unlicensed carrier to transmit data is solved.
  • a computer readable medium comprising computer readable instructions that, when executed, perform the operations of 101 to 103 or 201 to 203 of the method in the above embodiments.
  • a computer program product including the computer readable medium described above.
  • the signaling mentioned in the text includes, but is not limited to, an indication, an information, a signal, or a message, and is not limited herein.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit. It can be electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明公开了一种数据重传方法、设备及系统,涉及通信领域,能够解决现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。具体方案为:第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。本发明用于数据重传。

Description

一种数据重传方法、设备及系统 技术领域
本发明涉及通信领域,尤其涉及一种数据重传方法、设备及系统。
背景技术
在无线通信网络中,各个设备需要利用频率资源进行信息传输,频率资源也被称为频谱。频谱可以分为授权频谱和非授权频谱。授权频谱是一些运营商专属的频率资源,非授权频谱是无线通信网络中公用的频率资源。授权频谱上的载波称为授权载波,非授权频谱上的载波称为非授权载波。随着通信技术的发展,无线通信网络中传输的信息量日益增加,抢占非授权频谱传输信息,可以提高无线通信网络中的数据吞吐量,更好地满足用户的需求。
现有技术中,为提高无线信道传输可靠性,HARQ(Hybrid Automatic Repeat Request,混合自动重传请求)作为一种主要的数据重传手段被广泛应用。例如,当第一设备向第二设备发送数据后,第二设备会向第一设备反馈ACK/NACK(Acknowledgement/Negative Acknowledgement,确认/否定应答)消息,第一设备根据第二设备的反馈信息确定是否向第二设备再次传输此数据,如果需要会再次发送该数据,这样一次数据传输的过程是一个HARQ进程。
示例性的,在LAA-LTE(LicensedAssisted Access Using Long Term Evolution,长期演进的授权辅助接入)系统中,发送设备利用非授权载波传输数据时,不能一直占用信道,当发送设备占用非授权载波一定时间后,需要重新抢占信道,这将导致HARQ的重传中断,接收端只能等待发送设备再次抢占信道后再接收数据,如何实现非授权载波的HARQ的重传成为亟待解决的问题。
发明内容
本发明的实施例提供一种数据重传方法、设备及系统,能够解决现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
为达到上述目的,本发明的实施例采用如下技术方案:
第一方面,本发明实施例提供一种数据重传的方法,包括:
第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
结合第一方面,在第一方面的第一种可能的实现方式中,所述方法还包括:
所述第一设备向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
结合第一方面的第一种可能的实现方式,在第一方面的第二种可能的实现方式中,
所述第一设备向所述第二设备发送控制信令包括:
所述第一设备使用所述第二载波向所述第二设备发送控制信令。
结合第一方面的第一种可能的实现方式,在第一方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第一方面或第一方面的第一至第三种可能的实现方式中任一实现方式,在第一方面的第四种可能的实现方式中,
所述第一设备获取所述第一载波的状态信息包括:
所述第一设备主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第一方面或第一方面的第一至第三种可能的实现方式中任一实现方式,在第一方面的第五种可能的实现方式中,所述方法还包括:
所述第一设备向所述第二设备发送所述第一载波的状态信息。
结合第一方面的第五种可能的实现方式,在第一方面的第六种可能的实现方式中,所述第一设备向所述第二设备发送所述第一载波的状态信息包括:
所述第一设备使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
结合第一方面或第一方面的第一至第六种可能的实现方式中任一实现方式,在第一方面的第七种可能的实现方式中,所述第二载波为授权载波或非授权载波。
第二方面,本发明实施例提供一种数据重传方法,包括:
第二设备接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
所述第二设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
当所述第一载波不可用时,所述第二设备使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
结合第二方面,在第二方面的第一种可能的实现方式中,所述方法还包括:
所述第二设备接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
结合第二方面的第一种可能的实现方式,在第二方面的第二种可能的实现方式中,所述第二设备接收所述第一设备发送的控制信令包括:
所述第二设备使用所述第二载波接收所述第一设备发送的控制信令。
结合第二方面的第一种可能的实现方式,在第二方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第二方面或第二方面的第一至第三种可能的实现方式中任一实现方式,在第二方面的第四种可能的实现方式中,所述第二设备获取所述第一载波的状态信息包括:
所述第二设备主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第二方面的第四种可能的实现方式,在第二方面的第五种可能的实现方式中,所述第二设备通过所述第一设备获取所述第一载波的状态信息包括:
所述第二设备接收所述第一设备发送的所述第一载波的状态信息。
结合第二方面的第五种可能的实现方式,在第二方面的第六种可能的实现方式中,所述第二设备接收所述第一设备发送的所述第一载波的状态信息包 括:
所述第二设备使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
结合第二方面或第二方面的第一至第六种可能的实现方式中任一实现方式,在第二方面的第七种可能的实现方式中,
所述第二载波为授权载波或非授权载波。
第三方面,本发明实施例一种第一设备,包括:
发送单元,用于使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
获取单元,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
重传单元,用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
结合第三方面,在第三方面的第一种可能的实现方式中,
所述发送单元还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
结合第三方面的第一种可能的实现方式,在第三方面的第二种可能的实现方式中,
所述发送单元还用于使用所述第二载波向所述第二设备发送控制信令。
结合第三方面的第一种可能的实现方式,在第三方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第三方面或第三方面的第一至第三种可能的实现方式中任一实现方式,在第三方面的第四种可能的实现方式中,
所获取单元还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第三方面或第三方面的第一至第三种可能的实现方式中任一实现方式,在第三方面的第五种可能的实现方式中,
所述发送单元还用于向所述第二设备发送所述第一载波的状态信息。
结合第三方面的第五种可能的实现方式,在第三方面的第六种可能的实现方式中,
所述发送单元还用于使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
第四方面,本发明实施例提供一种第二设备,包括:
第一接收单元,用于接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
获取单元,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
第二接收单元,用于当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
结合第四方面,在第四方面的第一种可能的实现方式中,所述设备还包括:
第三接收单元,用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
结合第四方面的第一种可能的实现方式,在第四方面的第二种可能的实现方式中,
所述第三接收单元还用于使用所述第二载波接收所述第一设备发送的控制信令。
结合第四方面的第一种可能的实现方式,在第四方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第四方面或第四方面的第一至第三种可能的实现方式中任一实现方式,在第四方面的第四种可能的实现方式中,
所述获取单元还用于主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第四方面的第四种可能的实现方式,在第四方面的第五种可能的实现方式中,
所述获取单元还用于接收所述第一设备发送的所述第一载波的状态信息。
结合第四方面的第五种可能的实现方式,在第四方面的第六种可能的实现 方式中,
所述获取单元还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
第五方面,本发明实施例提供一种第一设备,包括:处理器、存储器、总线及发送器,所述处理器、所述存储器及所述发送器通过所述总线相互连接并通信;
所述发送器,用于使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
所述处理器,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
所述发送器,还用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
结合第五方面,在第五方面的第一种可能的实现方式中,所述发送器还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
结合第五方面的第一种可能的实现方式,在第五方面的第二种可能的实现方式中,所述发送器还用于使用所述第二载波向所述第二设备发送控制信令。
结合第五方面的第一种可能的实现方式,在第五方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第五方面或第五方面的第一至第三种可能的实现方式中任一实现方式,在第五方面的第四种可能的实现方式中,所处理器还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第五方面或第五方面的第一至第三种可能的实现方式中任一实现方式,在第五方面的第五种可能的实现方式中,所述发送器还用于向所述第二设备发送所述第一载波的状态信息。
结合第五方面的第五种可能的实现方式,在第五方面的第六种可能的实现方式中,
所述发送器还用于使用所述第一载波或所述第二载波向所述第二设备发 送所述第一载波的状态信息。
第六方面,本发明实施例提供一种第二设备,包括:处理器、存储器、总线及接收器,所述处理器、所述存储器及所述接收器通过所述总线相互连接并通信;
所述接收器,用于接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
所述处理器,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
所述接收器,还用于当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
结合第六方面,在第六方面的第一种可能的实现方式中,所述接收器,还用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
结合第六方面的第一种可能的实现方式,在第六方面的第二种可能的实现方式中,所述接收器还用于使用所述第二载波接收所述第一设备发送的控制信令。
结合第六方面的第一种可能的实现方式,在第六方面的第三种可能的实现方式中,
所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
结合第六方面或第六方面的第一至第三种可能的实现方式中任一实现方式,在第六方面的第四种可能的实现方式中,
所述处理器还用于主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
结合第六方面的第四种可能的实现方式,在第六方面的第五种可能的实现方式中,
所述处理器还用于接收所述第一设备发送的所述第一载波的状态信息。
结合第四方面的第五种可能的实现方式,在第四方面的第六种可能的实现方式中,
所述处理器还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
第七方面,本发明实施例提供一种无线通信系统,包括:第一设备和第二设备;
其中,所述第一设备为第三方面或第三方面的任意一种可能的实现方式中所述的第一设备,所述第二设备为第四方面或第四方面的任意一种可能的实现方式中所述的第二设备;
或者,所述第一设备为第五方面或第五方面的任意一种可能的实现方式中所述的第一设备,所述第二设备为第六方面或第六方面的任意一种可能的实现方式中所述的第二设备。
本发明实施例提供的一种数据重传方法、设备及系统,第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种数据重传方法流程示意图;
图2为本发明另一实施例提供的一种数据重传方法流程示意图;
图3为本发明实施例提供的一种第一设备结构示意图;
图4为本发明实施例提供的一种第二设备结构示意图;
图5为本发明另一实施例提供的一种第一设备结构示意图;
图6为本发明另一实施例提供的一种第二设备结构示意图;
图7为本发明实施例提供的一种无线通信系统结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是 全部的实施例。基于本发明中的实施例,本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
应理解,本发明实施例的技术方案可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)或全球互联微波接入(Worldwide Interoperability for Microwave Access,WiMAX)通信系统等。
应理解,在本发明实施例中,第一设备或第二设备包括但不限于用户设备(英文全称:User Equipment,英文简称:UE)、移动台(英文全称:Mobile Station,英文简称:MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等,该用户设备可以经无线接入网(英文全称:Radio Access Network,英文简称:RAN)与一个或多个核心网进行通信,例如,用户设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等,用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
本发明实施例中,第一设备或第二设备可以是GSM或CDMA中的基站(英文全称:Base Transceiver Station,英文缩写:BTS),也可以是WCDMA中的基站(NodeB),还可以是LTE中的演进型基站(英文全称:evolved Node B,英文缩写:eNB或e-NodeB),本发明实施例并不限定。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本发明的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对 于这些过程、方法、产品或设备固有的其它步骤或单元。
应理解,本发明实施例提供的数据传输方法可适用于无线通信系统,本发明实施例以应用于LTE/LTE-A无线通信系统为例对所述方法进行分析说明,不构成对本发明的限定。
本发明实施例中,当第一设备是全球移动通讯(GSM,Global System of Mobile communication)系统、码分多址(CDMA,Code Division Multiple Access)系统中的基站(BTS,Base Transceiver Station)、宽带码分多址(WCDMA,Wideband Code Division Multiple Access)系中的基站或者是LAA-LTE系统中的基站时,第二设备可以为用户设备(UE,User Equipment),包括但不限于于移动台(MS,Mobile Station)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等,该第一设备可以经无线接入网(RAN,Radio Access Network)与一个或多个核心网进行通信,例如,第二设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等,第二设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动设备。当第一设备为用户设备时,第二设备可以为基站。当第一设备为用户设备时,第二设备也可以为用户设备,第二设备可以为接收第一设备发送数据的接收设备。
本发明实施例提供一种数据重传方法,优选的,应用于LAA-LTE(LicensedAssisted Access Using Long Term Evolution,长期演进的授权辅助接入)系统或LTE(Long Term Evolution,长期演进)系统,参照图1所示,包括以下步骤:
101、第一设备使用第一载波向第二设备传输数据。
其中,第一载波是非授权载波。
102、所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用。
所述第一载波的状态信息包括可用和不可用两种,如果LAA-LTE设备占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为可用,标记为on,如果LAA-LTE设备没有占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为不可用,标记为off。
103、当所述第一载波不可用时,所述第一设备使用第二载波向所述第二 设备重传所述数据,所述第一载波和所述第二载波为不同载波。
具体地,因为第一设备不能一直占用非授权载波,当第一设备占用非授权载波达到一定时间后需要重新抢占非授权载波,即,第一设备无法在第一载波上重传数据时,在第二载波上重传数据。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述方法还包括:
所述第一设备向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
可选的,所述第一设备向所述第二设备发送控制信令包括:
所述第一设备使用所述第二载波向所述第二设备发送控制信令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的 跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字段,DCI信令中的CIF字段用于指示所述数据。
可选的,所述第一设备获取所述第一载波的状态信息包括:
所述第一设备主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述方法还包括:
所述第一设备向所述第二设备发送所述第一载波的状态信息。
可选的,所述第一设备向所述第二设备发送所述第一载波的状态信息包括:
所述第一设备使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
具体地,所述第一设备可以通过授权载波,例如PBCH(Physical Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的数据重传方法,第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
本发明另一实施例提供一种数据重传方法,对应图1所示的实施例中描述的数据重传方法的接收侧,优选的,应用于LAA-LTE系统或LTE系统,参照图2所示,包括以下步骤:
201、第二设备接收第一设备使用第一载波传输的数据。
其中,第一载波是非授权载波。
202、所述第二设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用。
所述第一载波的状态信息包括可用和不可用两种,如果LAA-LTE设备占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为可用,标记为on,如果LAA-LTE设备没有占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为不可用,标记为off。
203、当所述第一载波不可用时,所述第二设备使用第二载波接收所述第二设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
具体地,因为第一设备不能一直占用非授权载波,当第一设备占用非授权载波达到一定时间后需要重新抢占非授权载波,即,第一设备无法在第一载波上重传数据时,在第二载波上重传数据。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述方法还包括:
所述第二设备接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
可选的,所述第二设备接收所述第一设备发送的控制信令包括:
所述第二设备使用所述第二载波接收所述第一设备发送的控制信 令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字 段,DCI信令中的CIF字段用于指示所述数据。
可选的,所述第二设备获取所述第一载波的状态信息包括:
所述第二设备主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述第二设备通过所述第一设备获取所述第一载波的状态信息包括:
所述第二设备接收所述第一设备发送的所述第一载波的状态信息。
可选的,所述第二设备接收所述第一设备发送的所述第一载波的状态信息包括:
所述第二设备使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
具体地,所述第一设备可以通过授权载波,例如PBCH(Physical Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的数据重传方法,第二设备接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;所述第二设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,所述第二设备使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
基于上述图1对应的实施例,本发明实施例提供一种第一设备,用于执行上述图1对应的实施例中所描述的数据重传方法,优选的,应用于LAA-LTE系统或LTE系统,可选的,第一设备可以是基站或用户设备,参照图3所示,所述第一设备30包括发送单元301、获取单元302和重传单元303。
发送单元301,用于使用第一载波向第二设备传输数据。
其中,第一载波是非授权载波。
获取单元302,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用。
所述第一载波的状态信息包括可用和不可用两种,如果LAA-LTE设备占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为可用,标记为on,如果LAA-LTE设备没有占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为不可用,标记为off。
重传单元303,用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
具体地,因为第一设备不能一直占用非授权载波,当第一设备占用非授权载波达到一定时间后需要重新抢占非授权载波,即,第一设备无法在第一载波上重传数据时,在第二载波上重传数据。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述发送单元301还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
可选的,所述发送单元301还用于使用所述第二载波向所述第二设备发送控制信令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI 信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字段,DCI信令中的CIF字段用于指示所述数据。
可选的,所获取单元302还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述发送单元301还用于向所述第二设备发送所述第一载波的状态信息。
可选的,所述发送单元301还用于使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
具体地,所述发送单元301可以通过授权载波,例如PBCH(Physical  Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的第一设备,使用第一载波向第二设备传输数据,所述第一载波是非授权载波;获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
基于上述图2对应的实施例,本发明实施例提供一种第二设备,用于执行上述图2对应的实施例中所描述的数据重传方法,优选的,应用于LAA-LTE系统或LTE系统,可选的,第二设备可以是基站或用户设备,参照图4所示,该第二设备40包括第一接收单元401、获取单元402和第二接收单元403。
第一接收单元401,用于接收第一设备使用第一载波传输的数据。
其中,第一载波是非授权载波。
获取单元402,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用。
所述第一载波的状态信息包括可用和不可用两种,如果LAA-LTE设备占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为可用,标记为on,如果LAA-LTE设备没有占用非授权载波发送数据,表示此设备在这个非授权载波上的状态为不可用,标记为off。
第二接收单元403,用于当所述第一载波不可用时,使用第二载波 接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
具体地,因为第一设备不能一直占用非授权载波,当第一设备占用非授权载波达到一定时间后需要重新抢占非授权载波,即,第一设备无法在第一载波上重传数据时,在第二载波上重传数据。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述设备还包括:
第三接收单元,用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
可选的,所述第三接收单元还用于使用所述第二载波接收所述第一设备发送的控制信令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字段,DCI信令中的CIF字段用于指示所述数据。
可选的,所述获取单元402还用于主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述获取单元402还用于接收所述第一设备发送的所述第一载波的状态信息。
可选的,所述获取单元402还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
具体地,所述第一设备可以通过授权载波,例如PBCH(Physical Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的第二设备,接收第一设备使用第一载波传输的数 据,所述第一载波是非授权载波;获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
基于上述图1对应的实施例,本发明另一实施例提供一种第一设备,用于执行上述图1对应的实施例中所描述的数据重传方法,优选的,应用于LAA-LTE系统或LTE系统,可选的,第一设备可以是基站或用户设备,参照图5所示,该第一设备50包括:至少一个处理器501、存储器502、总线503和发送器504,该至少一个处理器501、存储器502和发送器504通过总线503连接并完成相互间的通信。
该总线503可以是ISA(Industry Standard Architecture,工业标准体系结构)总线、PCI(Peripheral Component,外部设备互连)总线或EISA(Extended Industry Standard Architecture,扩展工业标准体系结构)总线等。该总线503可以分为地址总线、数据总线、控制总线等。为便于表示,图5中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。其中:
存储器502用于执行本发明方案的应用程序代码,执行本发明方案的应用程序代码保存在存储器502中,并由处理器501来控制执行。
该存储器502可以是只读存储器ROM或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器RAM或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器EEPROM、只读光盘CD-ROM或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。这些存储器通过总线与处理器相连接。
处理器501可能是一个中央处理器501(Central Processing Unit,简称为CPU),或者是特定集成电路(Application Specific Integrated  Circuit,简称为ASIC),或者是被配置成实施本发明实施例的一个或多个集成电路。
处理器501,用于调用存储器502中的程序代码,在一种可能的实施方式中,当上述应用程序被所述处理器501执行时,实现如下功能。
发送器504,用于使用第一载波向第二设备传输数据,所述第一载波是非授权载波。
处理器501,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用。
所述发送器504,还用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述发送器504还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
可选的,所述发送器504还用于使用所述第二载波向所述第二设备发送控制信令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对 应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字段,DCI信令中的CIF字段用于指示所述数据。
可选的,所处理器501还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述发送器504还用于向所述第二设备发送所述第一载波的状态信息。
可选的,所述发送器504还用于使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
具体地,所述发送器504可以通过授权载波,例如PBCH(Physical Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的第一设备,使用第一载波向第二设备传输数据,所述第一载波是非授权载波;获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
基于上述图2对应的实施例,本发明另一实施例提供一种第二设备,用于执行上述图2对应的实施例中所描述的数据重传方法,优选的,应用于LAA-LTE系统或LTE系统,可选的,第二设备可以是基站或用户设备,参照图6所示,该第二设备60包括至少一个处理器601、存储器602、总线603和接收器604,该至少一个处理器601、存储器602和接收器604通过总线603连接并完成相互间的通信。
该总线603可以是ISA(Industry Standard Architecture,工业标准体系结构)总线、PCI(Peripheral Component,外部设备互连)总线或EISA(Extended Industry Standard Architecture,扩展工业标准体系结构)总线等。该总线603可以分为地址总线、数据总线、控制总线等。为便于表示,图6中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。其中:
存储器602用于执行本发明方案的应用程序代码,执行本发明方案的应用程序代码保存在存储器中,并由处理器601来控制执行。
该存储器可以是只读存储器ROM或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器RAM或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器EEPROM、只读光盘CD-ROM或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或 者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。这些存储器通过总线与处理器相连接。
处理器601可能是一个中央处理器601(Central Processing Unit,简称为CPU),或者是特定集成电路(Application Specific Integrated Circuit,简称为ASIC),或者是被配置成实施本发明实施例的一个或多个集成电路。
处理器601,用于调用存储器602中的程序代码,在一种可能的实施方式中,当上述应用程序被所述处理器601执行时,实现如下功能。
接收器604,用于接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
处理器601,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
接收器604,还用于当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
可选的,第二载波可以是授权载波或非授权载波。
可选的,所述接收器604,还用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
可选的,所述接收器604还用于使用所述第二载波接收所述第一设备发送的控制信令。
可选的,所述控制信令包括CIF(Carrier Indicator Field,载波指示字段),所述载波指示字段CIF用于指示所述数据。
所述CIF,用于指示传输所述数据的所述第一载波的编号,即表示所述数据来自于哪个载波。
现有技术中,CIF用于跨载波调度指示。例如授权载波编号为1,非授权载波编号为2,那么在授权载波中出现CIF=2的指示,表明这个是在授权载波上跨载波调度了一个编号为2的非授权载波上的数据,接收端收到这个DCI信息后,需要去非授权载波对应的位置接收数据。
在本发明实施例中,如果接收设备确知编号为2的非授权载波为off态,即相应的发送设备没有占用这个编号为2的非授权载波发送数据,那么接收设备在授权载波上收到CIF=2的DCI(Downlink Control Information,下行控制信息),表明这个是在授权载波上跨载波传输了一个编号为2的非授权载波上的HARQ重传包,接收端收到这个DCI信息后,需要继续在授权载波上的对应位置接收编号为2的非授权载波上的HARQ重传数据。当然此时的DCI中的NDI(New Data Indicator,新数据指示符)信息可以用来指示此数据是一个HARQ重传包。
此时,可以理解的是,在第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段,也可以不省略CIF字段,此时CIF的取值为第二载波的载波编号。
不省略CIF字段的好处是接收设备在接收第二载波上传输的第一载波的跨载波传输HARQ数据和第二载波上传输的本载波的数据或本载波的HARQ重传数据时,可以按照相同的DCI长度对DCI进行解调译码,不会对DCI长度的理解造成混淆,接收设备的行为较为简单,不需要对DCI长度进行盲检测。
现有技术中,当所述第一载波为on时,HARQ重传包在所述第一载波上传输,接收设备在所述第一载波上接收本载波的HARQ重传包,此时第二载波上不存在跨载波传输,在第一载波或者第二载波上传输本载波数据或本载波的HARQ重传数据时,对应的用于指示数据的DCI中可以省略CIF字段。
在本发明实施例中,存在跨载波传输HARQ重传包的情况,使用CIF字段,DCI信令中的CIF字段用于指示所述数据。
可选的,所述处理器601还用于主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
可选的,所述处理器601还用于接收所述第一设备发送的所述第一载波的状态信息。
可选的,所述处理器601还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
具体地,所述第一设备可以通过授权载波,例如PBCH(Physical Broadcast Channel,物理广播信道)传输相应信息,通知所有接收端,或者可以通过所 述第一设备在所述第一载波上的on-off状态变更时对应的授权载波上的PDCCH(Physical Downlink Control Channel,物理下行控制信道)或PUCCH(Physical uplink Control Channel,物理上行控制信道)或RRC(Radio Resource Control,无线资源控制)信令,通知接收端所述第一载波的on-off状态发生改变。
所述第一设备在所述第一载波上的on-off状态还可以通过所述第一载波传输相应信息通知所有接收端,具体的可以通过在所述第一载波上的on-off状态变更时对应的所述第一载波上的PDCCH或PUCCH或RRC信令,通知接收端所述第一载波的on-off状态发生改变。
本发明实施例提供的第二设备,接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
基于上述图1和图2对应的实施例,本发明实施例提供一种无线通信系统,用于执行上述图1和图2对应的实施例中所描述的数据重传方法,优选的,应用于LAA-LTE系统或LTE系统。参照图7所示,该无线通信系统70包括:第一设备701和第二设备702。
其中,第一设备701为图3对应的实施例中所描述的第一设备,第二设备702为图4对应的实施例中所描述的第一设备。
或者,第一设备701为图5对应的实施例中所描述的第一设备,第二设备702为图6对应的实施例中所描述的第一设备。
优选的,第一设备可以是基站,第二设备可以是用户设备,或者,第一设备是用户设备,第二设备是基站。
本发明实施例提供的无线通信系统,第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重 传所述数据,所述第一载波和所述第二载波为不同载波。解决了现有技术中设备利用非授权载波传输数据时,因为需要重新抢占信道导致无法进行数据重传的问题。
此外,还提供一种计算可读媒体(或介质),包括在被执行时进行以下操作的计算机可读指令:执行上述实施例中的方法的101至103或201至203的操作。
另外,还提供一种计算机程序产品,包括上述计算机可读介质。
需要说明的是:全文中提及的信令包括但不限于:指示,信息,信号或消息等,此处不做限定。
应理解,本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
应理解,在本发明的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接, 可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应所述以权利要求的保护范围为准。

Claims (41)

  1. 一种数据重传方法,其特征在于,包括:
    第一设备使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
    所述第一设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    当所述第一载波不可用时,所述第一设备使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
  2. 根据权利要求1所述的方法,其特征在于,还包括:
    所述第一设备向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
  3. 根据权利要求2所述的方法,其特征在于,所述第一设备向所述第二设备发送控制信令包括:
    所述第一设备使用所述第二载波向所述第二设备发送控制信令。
  4. 根据权利要求2所述的方法,其特征在于,
    所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
  5. 根据权利要求1-4中任意一项所述的方法,其特征在于,所述第一设备获取所述第一载波的状态信息包括:
    所述第一设备主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
  6. 根据权利要求1-4中任意一项所述的方法,其特征在于,还包括:
    所述第一设备向所述第二设备发送所述第一载波的状态信息。
  7. 根据权利要求6所述的方法,其特征在于,所述第一设备向所述第二设备发送所述第一载波的状态信息包括:
    所述第一设备使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
  8. 根据权利要求1-7中任意一项所述的方法,其特征在于,
    所述第二载波为授权载波或非授权载波。
  9. 一种数据重传方法,其特征在于,包括:
    第二设备接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
    所述第二设备获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    当所述第一载波不可用时,所述第二设备使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
  10. 根据权利要求9所述的方法,其特征在于,还包括:
    所述第二设备接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
  11. 根据权利要求10所述的方法,其特征在于,所述第二设备接收所述第一设备发送的控制信令包括:
    所述第二设备使用所述第二载波接收所述第一设备发送的控制信令。
  12. 根据权利要求10所述的方法,其特征在于,
    所述控制信令包括载波指示字段CIF,所述载波指示字段CIF用于指示所述数据。
  13. 根据权利要求9-12中任意一项所述的方法,其特征在于,所述第二设备获取所述第一载波的状态信息包括:
    所述第二设备主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
  14. 根据权利要求13所述的方法,其特征在于,所述第二设备通过所述第一设备获取所述第一载波的状态信息包括:
    所述第二设备接收所述第一设备发送的所述第一载波的状态信息。
  15. 根据权利要求14所述的方法,其特征在于,所述第二设备接收所述第一设备发送的所述第一载波的状态信息包括:
    所述第二设备使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
  16. 根据权利要求9-15中任意一项所述的方法,其特征在于,
    所述第二载波为授权载波或非授权载波。
  17. 一种第一设备,其特征在于,包括:
    发送单元,用于使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
    获取单元,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    重传单元,用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
  18. 根据权利要求17所述的设备,其特征在于,
    所述发送单元还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
  19. 根据权利要求18所述的设备,其特征在于,
    所述发送单元还用于使用所述第二载波向所述第二设备发送控制信令。
  20. 根据权利要求17-19中任意一项所述的设备,其特征在于,所获取单元还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
  21. 根据权利要求17-19中任意一项所述的设备,其特征在于,所述发送单元还用于向所述第二设备发送所述第一载波的状态信息。
  22. 根据权利要求21所述的设备,其特征在于,所述发送单元还用于使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
  23. 一种第二设备,其特征在于,包括:
    第一接收单元,用于接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
    获取单元,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    第二接收单元,用于当所述第一载波不可用时,使用第二载波接收 所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
  24. 根据权利要求23所述的设备,其特征在于,还包括:
    第三接收单元,用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
  25. 根据权利要求24所述的设备,其特征在于,
    所述第三接收单元还用于使用所述第二载波接收所述第一设备发送的控制信令。
  26. 根据权利要求23-25中任意一项所述的设备,其特征在于,
    所述获取单元还用于主动获取、通过所述第一设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
  27. 根据权利要求26所述的设备,其特征在于,
    所述获取单元还用于接收所述第一设备发送的所述第一载波的状态信息。
  28. 根据权利要求27所述的设备,其特征在于,
    所述获取单元还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
  29. 一种第一设备,其特征在于,包括:处理器、存储器、总线及发送器,所述处理器、所述存储器及所述发送器通过所述总线相互连接并通信;
    所述发送器,用于使用第一载波向第二设备传输数据,所述第一载波是非授权载波;
    所述处理器,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    所述发送器,还用于当所述第一载波不可用时,使用第二载波向所述第二设备重传所述数据,所述第一载波和所述第二载波为不同载波。
  30. 根据权利要求29所述的设备,其特征在于,
    所述发送器还用于向所述第二设备发送控制信令,所述控制信令用于指示所述数据。
  31. 根据权利要求30所述的设备,其特征在于,
    所述发送器还用于使用所述第二载波向所述第二设备发送控制信令。
  32. 根据权利要求29-31中任意一项所述的设备,其特征在于,所处理器还用于主动获取、通过所述第二设备获取、通过第三方设备获取或通过预配置信息获取所述第一载波的状态信息。
  33. 根据权利要求29-31中任意一项所述的设备,其特征在于,所述发送器还用于向所述第二设备发送所述第一载波的状态信息。
  34. 根据权利要求33所述的设备,其特征在于,所述发送器还用于使用所述第一载波或所述第二载波向所述第二设备发送所述第一载波的状态信息。
  35. 一种第二设备,其特征在于,包括:处理器、存储器、总线及接收器,所述处理器、所述存储器及所述接收器通过所述总线相互连接并通信;
    所述接收器,用于接收第一设备使用第一载波传输的数据,所述第一载波是非授权载波;
    所述处理器,用于获取所述第一载波的状态信息,所述状态信息用于确定所述第一载波是否可用;
    所述接收器,还用于当所述第一载波不可用时,使用第二载波接收所述第一设备重传的所述数据,所述第一载波和所述第二载波为不同载波。
  36. 根据权利要求35所述的设备,其特征在于,
    所述接收器,还用于接收所述第一设备发送的控制信令,所述控制信令用于指示所述数据。
  37. 根据权利要求36所述的设备,其特征在于,
    所述接收器还用于使用所述第二载波接收所述第一设备发送的控制信令。
  38. 根据权利要求35-37中任意一项所述的设备,其特征在于,
    所述处理器还用于主动获取、通过所述第一设备获取、通过第三方 设备获取或通过预配置信息获取所述第一载波的状态信息。
  39. 根据权利要求38所述的设备,其特征在于,
    所述处理器还用于接收所述第一设备发送的所述第一载波的状态信息。
  40. 根据权利要求39所述的设备,其特征在于,
    所述处理器还用于使用所述第一载波或所述第二载波接收所述第一设备发送的所述第一载波的状态信息。
  41. 一种无线通信系统,其特征在于,包括:第一设备和第二设备;
    其中,所述第一设备为权利要求17-22中任意一项所述的第一设备,所述第二设备为权利要求23-28中任意一项所述的第二设备;
    或者,所述第一设备为权利要求29-34中任意一项所述的第一设备,所述第二设备为权利要求35-40中任意一项所述的第二设备。
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