WO2015188380A1 - 数据发送方法和装置、数据接收方法和装置 - Google Patents

数据发送方法和装置、数据接收方法和装置 Download PDF

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Publication number
WO2015188380A1
WO2015188380A1 PCT/CN2014/079863 CN2014079863W WO2015188380A1 WO 2015188380 A1 WO2015188380 A1 WO 2015188380A1 CN 2014079863 W CN2014079863 W CN 2014079863W WO 2015188380 A1 WO2015188380 A1 WO 2015188380A1
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WIPO (PCT)
Prior art keywords
user equipment
unlicensed spectrum
base station
data
uplink data
Prior art date
Application number
PCT/CN2014/079863
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English (en)
French (fr)
Inventor
杨美英
曹振臻
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201480036716.5A priority Critical patent/CN105379384B/zh
Priority to PCT/CN2014/079863 priority patent/WO2015188380A1/zh
Publication of WO2015188380A1 publication Critical patent/WO2015188380A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/02Selection of wireless resources by user or terminal

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a data transmitting method and apparatus, a data receiving method and apparatus.
  • the spectrum is the basis of wireless communication. According to the recently released Federal Communications Commission (FCC) International Frequency White Paper, unlicensed spectrum resources are larger than licensed spectrum resources. Applying LTE (Long Term Evolution) equipment to unlicensed spectrum can not only effectively utilize unlicensed spectrum resources, but also provide more efficient wireless access to meet the growing demand for mobile broadband services.
  • FCC Federal Communications Commission
  • the LTE base station acquires the idle unlicensed spectrum resource by means of network interception, and then configures the obtained unlicensed spectrum resource as the secondary cell to the LTE user equipment, so that the LTE user equipment can use the spectrum resource to perform data transmission.
  • the device needs to listen before sending data, and only when the listening result is idle.
  • the transmission needs to be controlled by the base station.
  • the base station does not know what the result of the UE is listening, and after obtaining the listening result, the UE does not know whether the base station will schedule itself, and thus the interception result of the UE and the scheduling of the base station.
  • the embodiment of the invention provides a data sending method and device, a data receiving method and a device, which can prevent the monitoring result of the user equipment from being inconsistent with the scheduling of the base station.
  • a first aspect of the embodiments of the present invention provides a data sending method, including:
  • the user equipment receives an indication from the base station, where the indication is used to indicate a preset unlicensed spectrum; the user equipment listens to whether the preset unlicensed spectrum is idle, if the preset is unauthorized If the spectrum is idle, the user equipment sends the uplink data to the base station by using the preset unlicensed spectrum.
  • the sending, by the user equipment, the uplink data to the base station by using the preset unlicensed spectrum includes:
  • the user equipment uses the carrier sense multiple access/collision avoidance mode or the carrier sense multiple access/collision detection mode to send uplink data to the base station by using the preset unlicensed spectrum.
  • a second implementation manner of the first aspect of the embodiment of the present disclosure if the preset unlicensed spectrum is not idle, The user equipment performs a backoff operation.
  • the user equipment uses the carrier sense multiple access/collision avoidance mode
  • the preset unlicensed spectrum sends uplink data to the base station, and if the preset unlicensed spectrum is not idle, the user equipment uses a carrier sense multiple access/collision avoidance mechanism to perform a backoff operation;
  • the user equipment uses the carrier sense multiple access/collision detection mode to send uplink data to the base station by using the preset unlicensed spectrum, if the preset unlicensed spectrum is not idle, the user The device uses the carrier sense multiple access/collision detection mechanism to perform the backoff operation.
  • the method further includes:
  • the user equipment further receives an indication from the base station of an uplink data transmission duration
  • the method further includes:
  • the user equipment determines the amount of data of the uplink data to be sent according to the uplink data transmission duration.
  • the method further includes: The user equipment receives the acknowledgment information from the base station by using a block acknowledgment mechanism or a normal acknowledgment mechanism, where the acknowledgment information is used to indicate that the base station receives the uplink data.
  • a second aspect of the embodiments of the present invention provides a data sending apparatus, including:
  • a receiving module configured to receive an indication from a base station, where the indication is used to indicate a preset unlicensed spectrum
  • a processing module configured to listen, by the receiving module, whether the preset unlicensed spectrum is idle;
  • a sending module configured to send uplink data to the base station by using the preset unlicensed spectrum when the processing module detects that the preset unlicensed spectrum is idle.
  • the sending module is specifically configured to: when the processing module detects the preset unlicensed spectrum idle When the carrier sense multiple access/collision avoidance mode or the carrier sense multiple access/collision detection mode is used, the preset unlicensed spectrum is used to send uplink data to the base station.
  • the processing module is further configured to detect the When the preset unlicensed spectrum is not idle, the backoff operation is performed.
  • the sending module is specifically configured to detect the The preset unlicensed spectrum is idle, and the carrier sense multiple access/collision avoidance mode is used to send uplink data to the base station by using the preset unlicensed spectrum;
  • the processing module is specifically configured to detect the When the preset unlicensed spectrum is not idle, the carrier sense multiple access/collision avoidance mechanism is used for the backoff operation; or
  • the sending module is specifically configured to use the carrier sense multiple access/collision detection mode to use the preset unlicensed spectrum to the mobile station when the processing module detects that the preset unlicensed spectrum is idle
  • the base station sends uplink data.
  • the processing module is specifically configured to perform a backoff operation by using a carrier sense multiple access/collision detection mechanism when detecting that the preset unlicensed spectrum is not idle.
  • the receiving module is further configured to receive an indication of an uplink data transmission duration from the base station; Used to use the preset unlicensed spectrum at the transmitting module to the Before the base station transmits the data, the amount of data of the uplink data to be sent is determined according to the uplink data transmission duration.
  • the receiving module is further configured to use, by using, the preset unlicensed spectrum to the sending module After the base station sends the data, the acknowledgment information from the base station is received by using a block acknowledgment mechanism or a normal acknowledgment mechanism, and the acknowledgment information is used to indicate that the base station receives the uplink data.
  • a third aspect of the embodiments of the present invention provides a data receiving method, including:
  • the base station sends an indication to the user equipment, where the indication is used to indicate a preset unlicensed spectrum; the base station receives uplink data from the user equipment, and the uplink data is that the user equipment determines that the unlicensed spectrum is idle. When sent using the unlicensed frequency.
  • the method further includes:
  • the eNB sends an acknowledgment message to the user equipment on the preset unlicensed spectrum or on the licensed spectrum, where the acknowledgment information is used to indicate that the base station receives the uplink data.
  • the base station is on the preset unlicensed spectrum or on the licensed spectrum.
  • Sending the confirmation information to the user equipment specifically includes:
  • the eNB sends an acknowledgment message to the user equipment by using a downlink subframe on the preset unlicensed spectrum or on the licensed spectrum, where the downlink subframe carries a medium access control layer indication, and is used to indicate the location. The location where the confirmation information is sent.
  • a fourth aspect of the embodiments of the present invention provides a data receiving apparatus, including:
  • a sending module configured to send an indication to the user equipment, where the indication is used to indicate a preset unlicensed spectrum
  • a receiving module configured to receive uplink data from the user equipment, where the uplink data is sent by the user equipment by using the unlicensed frequency when determining that the unlicensed spectrum is idle.
  • the sending module is further configured to: after the receiving module receives the uplink data from the user equipment, The acknowledgment information is sent to the user equipment on the preset unlicensed spectrum or on the licensed spectrum, and the acknowledgment information is used to indicate that the base station receives the uplink data.
  • the sending module is specifically configured to use the downlink subframe in the preset
  • the acknowledgment information is sent to the user equipment on the authorized spectrum or on the authorized spectrum, where the downlink subframe carries a medium access control layer indication for indicating the sending location of the acknowledgment information.
  • the embodiments of the present invention have the following advantages:
  • the user equipment itself listens in the unlicensed spectrum indicated by the base station, and decides to perform data transmission when idle, without transmitting data under the scheduling of the base station, thus satisfying ESTI EN 301
  • the device needs to listen to the protocol specification after sending the data, and also avoids the blind monitoring of the user equipment by the base station without knowing the interference of the user equipment, and the interception result of the user equipment is inconsistent with the scheduling of the base station. Case.
  • FIG. 1 is a flowchart of an embodiment of a data transmitting method according to the present invention
  • FIG. 2 is a flowchart of an embodiment of a data receiving method according to the present invention
  • FIG. 3 is a schematic structural diagram of an embodiment of a data transmitting apparatus according to the present invention
  • 4 is a schematic structural view of an embodiment of a data receiving apparatus of the present invention.
  • the present invention provides a data sending method and a data receiving method, which can prevent the listening result of the user equipment from being inconsistent with the scheduling of the base station.
  • the data sending method in the embodiment of the present invention includes:
  • the user equipment receives an indication from a base station, where the indication is used to indicate a preset unlicensed spectrum
  • the base station is an evolved base station in an LTE wireless communication system or an LTE-A wireless communication system.
  • the user equipment is an LTE user equipment.
  • the above is only an example. There are no restrictions on base stations and user equipment.
  • the unlicensed spectrum refers to a spectrum in which the center frequency point and the center frequency of the licensed spectrum are different.
  • Each base station can use a part of the unlicensed spectrum, which is configured by the operator when the network is initially configured.
  • the part of the unlicensed spectrum corresponding to each base station is a preset unlicensed spectrum.
  • the indication of the user equipment by the base station is used to indicate the preset unlicensed spectrum.
  • the preset unlicensed spectrum includes a time-frequency resource location, where the time-frequency resource includes a time domain resource and a frequency domain resource, where the time domain resource may be a half transmission time interval, a transmission time interval, or at least two transmissions.
  • the time interval and the like are not limited herein; the frequency domain resource may be a full bandwidth or a part of the subcarriers therein, which is not limited herein.
  • the time-frequency resource location specifically includes the number of OFDM symbols and the number of carriers.
  • the user equipment is configured to listen to whether the preset unlicensed spectrum is idle. If the preset unlicensed spectrum is idle, the user equipment sends the uplink to the base station by using the preset unlicensed spectrum. Data
  • the user equipment After receiving the indication from the base station, the user equipment starts to listen to the time-frequency resource location in the preset unlicensed spectrum indicated by the indication according to the indication, to confirm whether the preset unlicensed spectrum is idle.
  • the channel can be listened to according to the ESTI EN 301 893 protocol specification.
  • the user equipment When the user equipment is listening to the time-frequency resource location indicated by the base station, the user equipment uses the time domain resource in the time-frequency resource location as a time starting point to listen to the frequency domain resource in the time-frequency resource location. After detecting that the preset unlicensed spectrum is idle, the user equipment sends the uplink data to the base station.
  • the time start and frequency domain resources used by the user equipment for data transmission are different from the time start and frequency domain resources when the user equipment starts to listen, but depend on the result of the user equipment listening.
  • the time point and the frequency domain resource when the user equipment determines that the preset unlicensed spectrum is idle is the specific time-frequency resource in the preset unlicensed spectrum indicated by the base station.
  • the time-frequency resource used by the user equipment for uplink data transmission is a specific time-frequency resource in the preset unlicensed spectrum indicated by the base station.
  • the user equipment can confirm whether the preset unlicensed spectrum is idle according to various methods. For example, after the user equipment detects that the time-frequency resource is idle and idle for a preset time, it can confirm that the preset unlicensed spectrum is idle; wherein the specific size of the preset time is in different protocols. Already stipulated.
  • the preset time is different for the priority of the service, and the higher the service priority, the shorter the preset time.
  • the above methods are merely examples and are not limited.
  • the uplink data transmission can only be performed in the uplink subframe, and the protocol layer
  • the received data packet may be relatively large, resulting in the inability to complete the transmission within the uplink subframe. Therefore, the indication received by the user equipment is also used to indicate the uplink data transmission duration, and the protocol layer is matched with the appropriate data packet length to ensure that the user equipment completes the data transmission within the uplink data transmission time.
  • the specific uplink data transmission duration is calculated by the base station according to the configured bandwidth and the uplink subframe. The specific calculation method is a well-known technology, and details are not described herein.
  • the user equipment can obtain the uplink data transmission duration by reading the physical broadcast channel information of the base station, and control the data transmission duration of the user equipment according to the uplink data transmission duration.
  • the uplink data transmission duration is a time range for ensuring that the user equipment completes data transmission, and the data transmission duration of the user equipment does not necessarily be equal to the uplink data transmission duration.
  • the data transmission duration of the user equipment may be performed by the user equipment itself. It is determined that as long as the uplink data transmission duration is not exceeded. If the value is small, the user equipment will participate in the competition multiple times, resulting in waste of resources. If the value is large, the user equipment occupies too long a channel time, which reduces the transmission time of other user equipments in the network.
  • the user equipment Adjustments can be made by balancing their performance with the performance of other user devices. For example, considering the performance of the user equipment, when the MCS is low, the data transmission duration of the user equipment may be smaller; but when the MCS is higher, the data transmission duration of the user equipment may be higher.
  • the base station may not specify the uplink data transmission duration, which is not limited herein.
  • Carrier sensing and data transmission are no longer performed if the user equipment falls outside of the preset unlicensed speech indicated by the base station.
  • the user equipment itself performs interception in the preset unlicensed spectrum indicated by the base station, and decides to perform data transmission when the preset unlicensed spectrum is idle, without the scheduling of the base station.
  • Send data so that the device in the ESTI EN 301 893 protocol needs to be listened first.
  • the protocol specification for transmitting data also avoids some blind scheduling of the user equipment by the base station without understanding the interference of the user equipment.
  • the user equipment when the preset unlicensed spectrum is idle, the user equipment sends data to the base station using the preset unlicensed spectrum.
  • the user equipment uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) or carrier sense multiple access/collision detection (Carrier Sense Multiple Access with Collision)
  • the detection, CSMA/CD mode uses the preset unlicensed spectrum to send uplink data to the base station. In this way, the probability of collision of multiple user equipments can be reduced, the performance of the link can be improved, and serious interference caused by collision with other user equipments can be avoided.
  • the user equipment when the user equipment detects that the preset unlicensed spectrum is idle, the user equipment sends data to the base station by using the preset unlicensed spectrum.
  • the preset unlicensed spectrum may not always be idle. Therefore, preferably, after the user equipment is listening to whether the unlicensed spectrum is idle, the data sending method in this embodiment preferably further includes:
  • the user equipment performs a backoff operation. If the preset unlicensed spectrum is not idle, the user equipment performs a backoff operation.
  • the backoff operation refers to that when the user equipment's listening result is that the channel is not idle, the user equipment needs to wait for a period of time before performing repeated listening. In this way, the probability that the user equipment interception result is re-occurred as the channel is not idle can be reduced.
  • the user equipment can perform the backoff operation by using the CSMA/CA mechanism, which can reduce multiple users.
  • the probability of collision when the device competes for a channel If the user equipment sends the uplink data to the base station using the preset unlicensed spectrum in the CSMA/CD mode, the user equipment can perform the backoff operation using the CSMA/CD mechanism.
  • the time granularity of the user equipment for backoff operations may be a multiple of 9us or a multiple of the OFDM symbol length.
  • the above description is by way of example only and not limiting.
  • the user equipment may not perform the backoff operation, and is not limited herein.
  • the backoff operation is performed, and time-frequency resources can be reserved for the transmission of other user equipments, and at the same time, the next channel preemption can be prepared.
  • the data sending method in this embodiment further includes: the user equipment further Receiving an indication of the duration of the uplink data transmission from the base station. Therefore, in a step 102 of the embodiment, after the user equipment is listening to the preset unlicensed spectrum idle, the user equipment sends the preset unlicensed spectrum to the base station.
  • the data further includes: the user equipment, specifically, the user equipment determines the number of data packets to be sent according to the uplink data transmission duration. After determining the number, the user equipment controls the number of data packets to be sent to the determined number. There are several ways in which a user device can control the number of packets.
  • the user equipment may use the aggregated MPDU, the non-aggregated MPDU, or the non-aggregated MSDU to control the number of data packets, or may use the fragment to control the number of data packets.
  • the method of controlling the number of data packets is a well-known technique and will not be described herein. In this way, it can be ensured that the data transmission duration of the user equipment does not exceed the uplink data transmission duration.
  • the user equipment can determine the Mobile Switching Center (MSC) by itself or through the outer loop link, which is not limited herein.
  • MSC Mobile Switching Center
  • the step of determining, by the user equipment, the amount of data of the uplink data to be sent according to the transmission duration may also be omitted.
  • the base station After receiving the uplink data sent by the user equipment, the base station sends the acknowledgement information to the user equipment, where the acknowledgement information is used to indicate that the base station receives the uplink data.
  • the method further includes: the user equipment adopting block confirmation (Block-Acknowledgement)
  • Block-ACK mechanism or the Acknowledgement (ACK) mechanism receives the acknowledgement information from the base station, where the acknowledgement information is used to indicate that the base station receives the uplink data.
  • the uplink data sent by the user equipment is received from the base station, and before the base station sends the acknowledgement information of the uplink data to the user equipment, there is generally a delay, for example, the base station passes the downlink in the licensed spectrum or the unlicensed spectrum.
  • the acknowledgment information is transmitted on the downlink subframe, it takes a certain time for the base station to perform Turbo coding on the data packet.
  • the user equipment receives the acknowledgment information from the base station by using the Block-ACK mechanism, and can prevent the user equipment from requiring the base station to feed back the acknowledgment information within a short time interval after the uplink data transmission is completed.
  • the user equipment can also receive the acknowledgement information from the base station by using a normal ACK mechanism or other mechanisms, which is not limited herein.
  • an embodiment of the data receiving method in the present invention includes:
  • the base station sends an indication to the user equipment, where the indication is used to indicate a preset unlicensed spectrum.
  • the base station is an evolved base station in an LTE wireless communication system or an LTE-A wireless communication system.
  • the user equipment is an LTE user equipment.
  • the above is only an example, and does not limit the base station and user equipment.
  • the unlicensed spectrum refers to a spectrum in which the center frequency point and the center frequency of the licensed spectrum are different.
  • Each base station can only work in a part of the unlicensed spectrum, which is configured by the operator when the network is initially built.
  • the base station sends an indication to the user equipment, the indication is used to indicate a part of the unlicensed spectrum that the base station works.
  • the part of the unlicensed spectrum is referred to herein as a preset unlicensed spectrum.
  • the user equipment finds the time start and frequency domain resources to listen according to the preset unlicensed spectrum.
  • the base station sends the indication of the unlicensed spectrum to the user equipment.
  • the specific method is used to obtain the current uplink of the user equipment by using a random access channel (RACH).
  • RACH random access channel
  • the difference between the subframe boundary and the subframe boundary of the preset unlicensed spectrum, and the difference is sent to the user equipment. In this way, the user equipment can find the subframe boundary of the preset unlicensed spectrum according to the difference.
  • the base station receives uplink data from the user equipment, where the uplink data is sent by the user equipment by using the unlicensed frequency when determining that the unlicensed spectrum is idle.
  • the user equipment After receiving the indication from the base station, the user equipment will listen to the preset unlicensed spectrum indicated by the indication. When the user equipment determines that the unlicensed spectrum is idle, the unlicensed spectrum is used to send uplink data to the base station.
  • the user equipment sends data to the base station, and the base station acquires user equipment synchronization information to perform data reception.
  • the base station can also receive uplink data from the user equipment in other manners, which is not limited herein.
  • the base station has multiple methods to obtain synchronization information of the user equipment.
  • the base station may acquire the synchronization information of the user equipment by using the synchronization signal preamble, or may acquire the synchronization information of the user equipment by using the OFDM symbol header or the subframe header of the subframe sent by the user equipment. .
  • the base station indicates the preset unlicensed spectrum to the user equipment, so that the user equipment Listening within the preset unlicensed spectrum and making data transmissions when the preset unlicensed spectrum is idle, without sending data through the scheduling of the user equipment by the base station, thus satisfying
  • the device needs to listen to the protocol specification after sending data, and also avoids some blind scheduling of the user equipment by the base station without knowing the interference of the user equipment.
  • the method further includes:
  • the eNB sends an acknowledgment message to the user equipment on the preset unlicensed spectrum or on the licensed spectrum, where the acknowledgment information is used to indicate that the base station receives the uplink data.
  • the base station After receiving the data, the base station sends a confirmation message for confirming the received data to the user equipment.
  • the confirmation information may be an ACK signal.
  • the base station may send the acknowledgement information on the downlink subframe through the downlink in the authorized spectrum or the unlicensed spectrum.
  • the medium access control index is further included in the downlink subframe, and is used to indicate a user equipment to which the data packet belongs, and a sending location for indicating the confirmation information.
  • the user equipment can receive the acknowledgement information at the corresponding time-frequency location according to the indication of the MAC index.
  • the base station may not send confirmation information to the user equipment.
  • the base station may not transmit an acknowledgment signal.
  • the evolved base station eNB in the LTE wireless communication system sends an indication to the LTE user equipment, where the indication is used to indicate the time n of the user equipment to listen and the unlicensed frequency domain RB1-RB50, and the transmission used by the user equipment when transmitting the uplink data. Duration t.
  • the LTE user equipment starts listening to the unlicensed frequency domain RB1-RB50 at time n according to the indication of the eNB.
  • the LTE user equipment detects that the channel continuous idle time is greater than or equal to 34 us, it can confirm that the unlicensed frequency domain is idle, and use the unlicensed frequency domain to send uplink data to the base station by using the CSMA/CA mode.
  • the LTE user equipment controls the number of transmitted data packets according to the transmission duration t in the indication sent by the base station, so as to ensure that the duration used for transmitting the uplink data does not exceed the transmission duration t.
  • the eNB acquires synchronization information of the user equipment by using the synchronization signal preamble to receive data sent by the LTE user equipment. After receiving the data, the eNB passes the downlink primary carrier or the secondary carrier.
  • the acknowledgment message ACK signal is sent on the downlink subframe, where the downlink subframe further carries a MAC index, which is used to indicate that the data packet belongs to the LTE user equipment, and indicates an ACK signal sent by the eNB to the LTE user equipment. Send location.
  • the LTE user equipment receives the ACK signal at a corresponding time-frequency location according to the indication of the MAC index.
  • the data transmission apparatus 300 in the embodiment of the present invention includes:
  • the receiving module 301 is configured to receive an indication from a base station, where the indication is used to indicate a preset unlicensed spectrum.
  • the processing module 302 is configured to listen, by the receiving module 301, whether the preset unlicensed spectrum is idle;
  • the sending module 303 is configured to send uplink data to the base station by using the preset unlicensed spectrum when the processing module detects that the preset unlicensed spectrum is idle.
  • the receiving module, the processing module, and the sending module may be a receiver, a processor, and a transmitter in the user terminal, respectively.
  • the user terminal can be a mobile phone, a personal computer, a notebook computer, a tablet computer, or other types of terminals, and is not limited herein.
  • the user equipment itself performs interception in the preset unlicensed spectrum indicated by the base station, and decides to perform data transmission when the preset unlicensed spectrum is idle, without the scheduling of the base station.
  • Sending data which not only satisfies the protocol specification of the device in the ESTI EN 301 893 protocol, but also avoids the blind scheduling of the user equipment without knowing the interference of the user equipment.
  • the sending module 303 is specifically configured to use the preset unlicensed spectrum direction by using the CSMA/CA mode or the CSMA/CD mode when the processing module 302 detects that the preset unlicensed spectrum is idle.
  • the base station transmits uplink data.
  • the processing module 302 is further configured to perform a backoff operation when the preset unlicensed spectrum is not idle. In this way, the time-frequency resources can be given out for the transmission of other user equipments, and at the same time, the next channel preemption can be prepared.
  • the sending module 303 is specifically configured to: when the processing module 302 detects the preset unlicensed spectrum idle, use the carrier sense multiple access/collision avoidance mode to use the preset.
  • the unlicensed spectrum sends the uplink data to the base station; the processing module 302 is specifically configured to: when detecting that the preset unlicensed spectrum is not idle, use the carrier sense multiple access/collision avoidance mechanism to perform backoff Operation; or,
  • the sending module 303 is specifically configured to use the carrier sense multiple access/collision detection mode to use the preset unlicensed spectrum when the processing module 302 detects that the preset unlicensed spectrum is idle.
  • the uplink data is sent to the base station; the processing module 302 is specifically configured to perform a backoff operation by using a carrier sense multiple access/collision detection mechanism when detecting that the preset unlicensed spectrum is not idle.
  • the data transmitting apparatus includes:
  • a receiving module configured to receive an indication from a base station, where the indication is used to indicate a preset unlicensed spectrum
  • a processing module configured to listen, by the receiving module, whether the preset unlicensed spectrum is idle;
  • a sending module configured to send uplink data to the base station by using the preset unlicensed spectrum when the processing module detects that the preset unlicensed spectrum is idle.
  • the receiving module is further configured to receive an indication of an uplink data transmission duration from the base station, where the processing module is further configured to use, by the sending module, the preset unlicensed spectrum to the base station. Before transmitting the data, the amount of data of the uplink data to be transmitted is determined according to the uplink data transmission duration.
  • the receiving module, the processing module, and the sending module may be a receiver, a processor, and a transmitter in the user terminal, respectively.
  • the user terminal can be a mobile phone, a personal computer, a notebook computer, a tablet computer, or other types of terminals, and is not limited herein.
  • the data transmitting apparatus includes: a receiving module, configured to receive an indication from a base station, where the indication is used to indicate a preset unlicensed spectrum;
  • a processing module configured to listen, by the receiving module, whether the preset unlicensed spectrum is idle;
  • a sending module configured to send uplink data to the base station by using the preset unlicensed spectrum when the processing module detects that the preset unlicensed spectrum is idle.
  • the receiving module is further configured to: after the sending module sends the data to the base station by using the preset unlicensed spectrum, receive the data from the base station by using a Block-ACK mechanism or a normal ACK mechanism. Confirmation information, the confirmation information is used to indicate that the base station receives the uplink data.
  • the receiving module, the processing module, and the sending module may be a receiver, a processor, and a transmitter in the user terminal, respectively.
  • the user terminal can be a mobile phone, a personal computer, a notebook computer, a tablet computer, or other types of terminals, and is not limited herein.
  • the data transmitting apparatus in the embodiment of the present invention is described above.
  • the data receiving apparatus 400 in the embodiment of the present invention includes:
  • the sending module 401 is configured to send an indication to the user equipment, where the indication is used to indicate a preset unlicensed spectrum;
  • the receiving module 402 is configured to receive uplink data from the user equipment, where the uplink data is sent by the user equipment by using the unlicensed frequency when determining that the unlicensed spectrum is idle.
  • the sending module and the receiving module are respectively a transmitter and a receiver in the base station.
  • the above description is for illustrative purposes only and is not limiting.
  • the base station indicates the preset unlicensed spectrum to the user equipment, so that the user equipment itself listens within the preset unlicensed spectrum, and decides to perform data when the preset unlicensed spectrum is idle. Sending, without sending data through the base station to the user equipment, so as to satisfy the protocol specification of the device in the ESTI EN 301 893 protocol that needs to be first listened to and then send data, and also avoids the base station not knowing the interference of the user equipment. Some blind scheduling by the user equipment.
  • the sending module 401 is further configured to receive the source from the receiving module.
  • the acknowledgment information is sent to the user equipment on the preset unlicensed spectrum or on the licensed spectrum, where the acknowledgment information is used to indicate that the base station receives the uplink data.
  • the sending module 401 is specifically configured to send, by using a downlink subframe, the acknowledgement information to the user equipment on the preset unlicensed spectrum or on the licensed spectrum, where the downlink subframe carries the MAC. Index, used to indicate the sending location of the confirmation information.
  • the user equipment can receive the acknowledgement information at the corresponding time-frequency location according to the indication of the MAC index.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • 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 connection or communication connection shown or discussed may be an indirect engagement or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • the components displayed by the unit 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 objectives 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 above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the various aspects of the present invention. All or part of the steps of the method described in the examples.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

本发明实施例公开了一种数据发送方法和装置、数据接收方法和装置,用于避免用户设备的侦听结果和基站的调度不一致。本发明实施例方法包括:用户设备接收来自基站的指示,所述指示用于指示预置的未授权频谱;所述用户设备侦听所述预置的未授权频谱是否空闲,若所述预置的未授权频谱空闲,则所述用户设备使用所述预置的未授权频谱向所述基站发送上行数据。本发明实施例能够避免用户设备的侦听结果和基站的调度不一致。

Description

数据发送方法和装置、 数据接收方法和装置 技术领域
本发明涉及移动通信领域, 尤其涉及数据发送方法和装置、数据接收方法 和装置。
背景技术
频谱是无线通信的基础。 根据最新发布的美国联邦通信委员会(Federal Communications Commission, FCC ) 国际频语白皮书, 未授权 ( unlicensed ) 频谱资源要大于授权频谱资源。 将 LTE ( Long Term Evolution, 长期演进)设 备应用在非授权频谱, 不仅可以有效利用非授权频谱资源,还可以提供更为有 效的无线接入, 满足日益增长移动宽带服务需求。
考虑到 LTE用户设备 ( User equipment, UE )的特性, LTE系统利用未授 权频谱的可行方案之一是将未授权频谱作为 LTE设备的辅小区频谱资源使用。 例如, LTE基站通过网络侦听等方式获取空闲的未授权频谱资源, 然后将获取 到的未授权频谱资源作为辅小区配置给 LTE用户设备, 以使得 LTE用户设备 可以利用上述频谱资源进行数据传输。
根据 ESTI EN 301 893协议, 设备在进行数据发送之前需要进行侦听, 只 有侦听结果为空闲时, 才能进行数据发送。 此时, 对于 LTE的 UE设备, 其发 送又需要由基站控制。 基站在调度某个 UE时, 并不知道 UE侦听的结果是什 么, 而 UE在获得侦听结果后, 并不知道基站是否会调度自己, 从而会带来 UE的侦听结果和基站的调度可能存在不一致的问题, 导致 UE不能进行正常 的发送, 基站不能进行正常的调度和接收。 发明内容
本发明实施例提供了一种数据发送方法和装置、数据接收方法和装置, 能 够避免用户设备的侦听结果和基站的调度不一致。
本发明实施例第一方面提供一种数据发送方法, 包括:
用户设备接收来自基站的指示, 所述指示用于指示预置的未授权频谱; 所述用户设备侦听所述预置的未授权频谱是否空闲,若所述预置的未授权 频谱空闲,则所述用户设备使用所述预置的未授权频谱向所述基站发送上行数 据。
结合本发明实施例的第一方面,本发明实施例的第一方面的第一种实现方 式中,所述用户设备使用所述预置的未授权频谱向所述基站发送上行数据具体 包括:
所述用户设备釆用载波侦听多路访问 /碰撞避免方式或者载波侦听多路访 问 /碰撞检测方式使用所述预置的未授权频谱向所述基站发送上行数据。
结合本发明实施例的第一方面或第一方面的第一种实现方式,本发明实施 例的第一方面的第二种实现方式中, 若所述预置的未授权频谱不空闲, 则所述 用户设备进行退避操作。
结合本发明实施例的第一方面的第二种实现方式,本发明实施例的第一方 面的第三种实现方式中, 如果所述用户设备釆用载波侦听多路访问 /碰撞避免 方式使用所述预置的未授权频谱向所述基站发送上行数据,若所述预置的未授 权频谱不空闲, 则所述用户设备釆用载波侦听多路访问 /碰撞避免机制进行退 避操作;
或者,
如果所述用户设备釆用载波侦听多路访问 /碰撞检测方式使用所述预置的 未授权频谱向所述基站发送上行数据, 若所述预置的未授权频谱不空闲, 则所 述用户设备釆用载波侦听多路访问 /碰撞检测机制进行退避操作。
结合本发明实施例的第一方面,本发明实施例的第一方面的第四种实现方 式中, 所述方法还包括:
所述用户设备还接收来自基站的对上行数据传输时长的指示;
所述用户设备使用所述预置的未授权频谱向所述基站发送数据之前还包 括:
所述用户设备根据所述上行数据传输时长确定待发送的上行数据的数据 量。
结合本发明实施例的第一方面,本发明实施例的第一方面的第五种实现方 式中,所述用户设备使用所述预置的未授权频谱向所述基站发送上行数据之后 还包括: 所述用户设备釆用块确认机制或者正常的确认机制接收来自所述基站的 确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
本发明实施例第二方面提供一种数据发送装置, 包括:
接收模块, 用于接收来自基站的指示, 所述指示用于指示预置的未授权频 谱;
处理模块, 用于通过所述接收模块来侦听所述预置的未授权频谱是否空 闲;
发送模块, 用于在所述处理模块侦听到所述预置的未授权频谱空闲时,使 用所述预置的未授权频谱向所述基站发送上行数据。
结合本发明实施例的第二方面,本发明实施例的第二方面的第一种实现方 式中,所述发送模块具体用于在所述处理模块侦听到所述预置的未授权频谱空 闲时, 釆用载波侦听多路访问 /碰撞避免方式或者载波侦听多路访问 /碰撞检测 方式使用所述预置的未授权频谱向所述基站发送上行数据。
结合本发明实施例的第二方面或第二方面的第一种实现方式,本发明实施 例的第二方面的第二种实现方式中, 所述处理模块,还用于在侦听到所述预置 的未授权频谱不空闲时, 进行退避操作。
结合本发明实施例的第二方面的第二种实现方式,本发明实施例的第二方 面的第三种实现方式中,如果所述发送模块具体用于在所述处理模块侦听到所 述预置的未授权频谱空闲, 釆用载波侦听多路访问 /碰撞避免方式使用所述预 置的未授权频谱向所述基站发送上行数据;所述处理模块具体用于在侦听到所 述预置的未授权频谱不空闲时, 釆用载波侦听多路访问 /碰撞避免机制进行退 避操作; 或者,
如果所述发送模块具体用于在所述处理模块侦听到所述预置的未授权频 谱空闲时, 釆用载波侦听多路访问 /碰撞检测方式使用所述预置的未授权频谱 向所述基站发送上行数据;所述处理模块具体用于在侦听到所述预置的未授权 频谱不空闲时, 釆用载波侦听多路访问 /碰撞检测机制进行退避操作。
结合本发明实施例的第二方面,本发明实施例的第二方面的第四种实现方 式中, 所述接收模块还用于接收来自基站的对上行数据传输时长的指示; 所述处理模块还用于在所述发送模块使用所述预置的未授权频谱向所述 基站发送数据之前,根据所述上行数据传输时长确定待发送的上行数据的数据 量。
结合本发明实施例的第二方面,本发明实施例的第二方面的第五种实现方 式中,所述接收模块还用于在所述发送模块使用所述预置的未授权频谱向所述 基站发送数据之后,釆用块确认机制或者正常的确认机制接收来自所述基站的 确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
本发明实施例第三方面提供一种数据接收方法, 包括:
基站向用户设备发送指示, 所述指示用于指示预置的未授权频谱; 所述基站接收来自所述用户设备的上行数据,所述上行数据是所述用户设 备在确定所述未授权频谱空闲时使用所述未授权频语发送的。
结合本发明实施例的第三方面,本发明实施例的第三方面的第一种实现方 式中, 所述基站接收来自所述用户设备的上行数据之后还包括:
所述基站在所述预置的未授权频谱上或者在授权频谱上向所述用户设备 发送确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
结合本发明实施例的第三方面的第一种实现方式,本发明实施例的第三方 面的第二种实现方式中,所述基站在所述预置的未授权频谱上或者在授权频谱 上向所述用户设备发送确认信息具体包括:
所述基站通过下行子帧在所述预置的未授权频谱上或者在授权频谱上向 所述用户设备发送确认信息, 其中所述下行子帧携带有媒质接入控制层指示, 用于指示所述确认信息的发送位置。
本发明实施例第四方面提供一种数据接收装置, 包括:
发送模块, 用于向用户设备发送指示, 所述指示用于指示预置的未授权频 谱;
接收模块, 用于接收来自所述用户设备的上行数据, 所述上行数据是所述 用户设备在确定所述未授权频谱空闲时使用所述未授权频语发送的。
结合本发明实施例的第四方面,本发明实施例的第四方面的第一种实现方 式中,所述发送模块还用于在所述接收模块接收来自所述用户设备的上行数据 之后,在所述预置的未授权频谱上或者在授权频谱上向所述用户设备发送确认 信息, 所述确认信息用于指示所述基站接收到所述上行数据。 结合本发明实施例的第四方面的第一种实现方式,本发明实施例的第四方 面的第二种实现方式中,所述发送模块具体用于通过下行子帧在所述预置的未 授权频谱上或者在授权频谱上向所述用户设备发送确认信息,其中所述下行子 帧携带有媒质接入控制层指示, 用于指示所述确认信息的发送位置。
从以上技术方案可以看出, 本发明实施例具有以下优点:
本发明实施例中,通过用户设备自己在基站所指示的未授权频谱内进行侦 听, 并在空闲时自己决策进行数据发送, 而无需在基站的调度下才发送数据, 这样既满足 ESTI EN 301 893协议中设备需先侦听后发送数据的协议规范, 也 避免了基站在不了解用户设备干扰的情况下对用户设备做的一些盲调度而出 现的用户设备的侦听结果和基站的调度不一致的情况。
附图说明
图 1为本发明的数据发送方法的一个实施例的流程图; 图 2为本发明的数据接收方法的一个实施例的流程图; 图 3为本发明的数据发送装置的一个实施例的结构示意图; 图 4为本发明的数据接收装置的一个实施例的结构示意图。 具体实施方式
本发明提供了一种数据发送方法和数据接收方法,能够避免用户设备的侦 听结果和基站的调度不一致。
为了使本技术领域的人员更好地理解本发明方案,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的实施例, 而不是全部的实施例。基于本发 明中的实施例,本领域普通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, 都应当属于本发明保护的范围。
请参阅图 1, 本发明实施例中数据发送方法包括:
101、 用户设备接收来自基站的指示, 所述指示用于指示预置的未授权频 谱;
本实施例中, 该基站为 LTE无线通信系统或者 LTE-A无线通信系统中的 演进型基站。 相对应的, 该用户设备为 LTE用户设备。 当然, 上述仅为举例, 并不对基站和用户设备进行限制。
本实施例中,未授权频谱指的是中心频点和授权频谱的中心频点不同的频 谱。每个基站都可以使用该未授权频谱中的一部分, 其中该部分未授权频谱是 在网络初始配置时由运营商给该基站配置好的。 为描述方便, 本文中均称每个 基站所对应的该部分未授权频谱为预置的未授权频谱。每个基站在使用该预置 的未授权频谱时,具体使用该预置的未授权频谱中的哪个频段再由该基站在运 行中根据具体算法来决定。
基站对用户设备的指示用于指示该预置的未授权频谱。具体的, 该预置的 未授权频谱包括时频资源位置, 该时频资源包括时域资源和频域资源, 该时域 资源可以是半个传输时间间隔、一个传输时间间隔或者至少两个传输时间间隔 等等,在此不作限制;该频域资源可以是全带宽,也可以是其中的部分子载波, 在此不作限制。 在正交频分复用 ( Orthogonal Frequency-Division Multiplexing, OFDM ) 系统中, 该时频资源位置具体包括 OFDM符号数和载波数目。
102、 所述用户设备侦听所述预置的未授权频谱是否空闲, 若所述预置的 未授权频谱空闲,则所述用户设备使用所述预置的未授权频谱向所述基站发送 上行数据;
用户设备在接收到来自基站的指示后,根据该指示来对该指示所指示的预 置的未授权频谱中的时频资源位置开始进行侦听,以确认该预置的未授权频谱 是否空闲。 侦听的方式有多种, 例如, 可根据 ESTI EN 301 893协议规范对信 道进行侦听。
在用户设备对基站所指示的时频资源位置进行侦听时,用户设备以该时频 资源位置中的时域资源为时间起点来对该时频资源位置中的频域资源进行侦 听。 在侦听到预置的未授权频谱空闲后, 用户设备才向基站发送上行数据。 需 注意的是,此时用户设备进行数据发送所使用的时间起点和频域资源并不同于 用户设备开始侦听时的时间起点和频域资源,而是依赖于用户设备进行侦听的 结果,称该用户设备确定预置的未授权频谱空闲时的时间点和频域资源为该基 站所指示的预置的未授权频谱中的特定时频资源。 因此, 用户设备进行上行数 据发送所使用的时频资源为基站所指示的预置的未授权频谱中的特定时频资 源。 实际运用中, 用户设备可根据多种方法确认该预置的未授权频谱是否空 闲。具体举例来说,用户设备侦听该时频资源位置空闲且空闲持续预置时间后, 即可确认该预置的未授权频谱空闲; 其中, 该预置时间的具体大小在不同的协 议中分别已经规定好。 优选的, 该预置时间针对业务的优先级的不同而不同, 业务优先级越高, 则预置时间越短。 当然, 上述方法仅为举例, 并不作限制。
本实施例中, 在通信系统为 LTE无线通信系统或者 LTE-A无线通信系统 的情况下,当釆用时分多址接入方式时,上行数据传输只能在上行子帧中进行, 而协议层接收到的数据包可能比较大,导致在上行子帧内无法完成传输。因此, 优选的, 用户设备所接收到的指示中还用于指示上行数据传输时长, 同时在协 议层匹配合适的数据包长度,以保证用户设备在该上行数据传输时长内完成数 据传输。其中, 该具体上行数据传输时长由基站根据其配置好的带宽和上行子 帧计算出, 具体计算方法为公知技术, 在此不再赘述。
而用户设备可以通过读取基站的物理广播信道信息来获取上行数据传输 时长, 并根据该上行数据传输时长来控制该用户设备的数据发送时长。 需注意 的是, 该上行数据传输时长是保证用户设备完成数据传输的一个时间范围, 用 户设备的数据发送时长并不一定要等于该上行数据传输时长,该用户设备的数 据发送时长可由用户设备自己确定, 只要不超过该上行数据传输时长即可。但 若取值较小, 会导致用户设备多次参与竟争, 造成资源浪费; 若取值较大, 则 用户设备占用信道时间过长, 导致降低网络中其他用户设备的传输时间, 因此 用户设备可通过兼顾自身的性能和其他用户设备的性能做调整。例如, 考虑到 该用户设备的性能, 当 MCS较低时, 用户设备的数据发送的时长可以取值较 小; 但 MCS较高时, 用户设备的数据发送的时长可以取值较高。
当然,在其他无线通信系统中基站可以不指定上行数据传输时长, 在此不 不作限制。
若用户设备落在基站所指示的预置的未授权频语之外,则不再进行载波侦 听和数据传输。
本发明实施例中,通过用户设备自己在基站所指示的预置的未授权频谱内 进行侦听, 并在预置的未授权频谱空闲时自己决策进行数据发送, 而无需在基 站的调度下才发送数据, 这样既满足 ESTI EN 301 893协议中设备需先侦听后 发送数据的协议规范,也避免了基站在不了解用户设备干扰的情况下对用户设 备做的一些盲调度。
本实施例中, 当侦听到预置的未授权频谱空闲时, 用户设备使用预置的未 授权频谱向基站发送数据。 优选地, 用户设备釆用载波侦听多路访问 /碰撞避 免 ( Carrier Sense Multiple Access with Collision Avoidance, CSMA/CA )方式或 者载波侦听多路访问 /碰撞检测 (Carrier Sense Multiple Access with Collision
Detection, CSMA/CD ) 方式使用所述预置的未授权频谱向所述基站发送上行 数据。 这样, 可以降低多个用户设备发生碰撞的概率, 提升链路的性能, 避免 了和其他用户设备发生碰撞而造成的严重干扰的情况。
本实施例中, 当用户设备侦听到所述预置的未授权频谱空闲时, 用户设备 使用预置的未授权频谱向基站发送数据。 实际运用中, 该预置的未授权频谱并 不一定总是空闲的。 因此, 优选地, 在用户设备侦听所述未授权频谱是否空闲 之后, 本实施例的数据发送方法优选还包括:
103、 若所述预置的未授权频谱不空闲, 则所述用户设备进行退避操作。 若预置的未授权频谱不空闲, 则用户设备进行退避操作。其中该退避操作 指的是在用户设备的侦听结果为信道不空闲时,用户设备需要等待一段时间之 后再进行重复侦听。这样, 可以降低再次出现用户设备侦听结果为信道不空闲 的概率。
用户设备进行退避操作的机制有多种。具体举例来说,如果用户设备釆用 CSMA/CA方式使用所述预置的未授权频谱向所述基站发送上行数据, 用户设 备可釆用 CSMA/CA机制进行退避操作,这样可以降低多个用户设备竟争信道 时的碰撞概率。如果用户设备釆用 CSMA/CD方式使用所述预置的未授权频谱 向所述基站发送上行数据, 用户设备可釆用 CSMA/CD机制进行退避操作。用 户设备进行退避操作的时间粒度可以为 9us的倍数, 或者为 OFDM符号长度 的倍数。 当然, 上述描述仅为举例, 并不作限制。
当然, 实际运用中, 用户设备也可以不进行退避操作, 在此不作限制。 但 在侦听到信道忙时进行退避操作, 可以为其他用户设备的发送让出时频资源, 同时还可以为下一次信道抢占做准备。
本实施例中, 优选的, 本实施例的数据发送方法还包括: 所述用户设备还 接收来自基站的对上行数据传输时长的指示。 因此, 进一步优选的, 本实施例 的步骤 102中,在所述用户设备侦听所述预置的未授权频谱空闲之后, 所述用 户设备使用所述预置的未授权频谱向所述基站发送数据之前还包括:用户设备 具体地, 用户设备根据该上行数据传输时长来确定待发送的数据包的数 量。 确定好数量后, 用户设备控制所要发送的数据包的数量为所确定的数量。 用户设备控制数据包的数量有多种方法。具体举例来说, 用户设备可以釆用聚 合的 MPDU、 非聚合的 MPDU或者非聚合的 MSDU来控制数据包的数量, 或 者还可以釆用 fragment来控制数据包的数量。控制数据包的数量的方法为公知 技术, 在此不再赘述。 这样, 可以保证用户设备的数据发送时长不超过上行数 据传输时长。在传输数据过程中,用户设备可以自己决定移动交换中心( Mobile Switching Center, MSC ), 也可以通过外环链路自适应, 在此不作限制。
当然, 实际运用中,也可以省略用户设备还根据所述传输时长确定待发送 的上行数据的数据量这个步骤。
在基站接收到用户设备发送的上行数据之后,基站会向该用户设备发送确 认信息, 其中该确认信息用于指示所述基站接收到所述上行数据。 优选地, 在 本实施例的数据发送方法中,在所述用户设备使用所述预置的未授权频谱向所 述基站发送上行数据之后还包括: 所述用户设备釆用块确认 ( Block-Acknowledgement , Block-ACK 机 制 或 者 正 常 的 确 认 ( Acknowledgement, ACK )机制接收来自所述基站的确认信息, 所述确认信 息用于指示所述基站接收到所述上行数据。
实际运用中,从基站接收到用户设备发送的上行数据, 到基站向用户设备 发送接收到该上行数据的确认信息之前一般存在时延,例如在基站通过授权频 谱或者非授权频谱中的下行链路在下行子帧上发送该确认信息的情况中,若基 站对数据包进行 Turbo编码则需要一定的时间。 用户设备釆用 Block-ACK机 制接收来自所述基站的确认信息,可以避免用户设备在上行数据传输完成后短 时间间隔之内就需要基站反馈确认信息。 当然, 实际运用中, 用户设备也可以 釆用正常的 ACK机制或者其他机制接收来自基站的确认信息,在此不作限制。
上面对本发明实施例中的数据发送方法进行了描述,下面对本发明实施例 中的数据接收方法进行描述, 请参阅图 2, 本发明中的数据接收方法的一个实 施例包括:
201、 基站向用户设备发送指示, 所述指示用于指示预置的未授权频谱; 本实施例中, 该基站为 LTE无线通信系统或者 LTE-A无线通信系统中的 演进型基站。 相对应的, 该用户设备为 LTE用户设备。 当然, 上述仅为举例, 并不对基站和用户设备进行限制。
本实施例中,未授权频谱指的是中心频点和授权频谱的中心频点不同的频 谱。每个基站都只能工作在一部分未授权频谱, 该部分未授权频谱是在网络初 始建设时由运营商配置好的。基站向用户设备发送指示, 该指示用于指示该基 站所工作的部分未授权频谱, 为描述方便, 本文中均称该部分未授权频谱为预 置的未授权频谱。然后用户设备根据该预置的未授权频谱找到时间起点和频域 资源进行侦听。
基站向用户设备发送包括未授权频谱的指示有多种方法, 具体举例来说, 根据 RRC半静态配置的子帧配比, 基站通过随机接入信道(Random Access Channel, RACH )获取用户设备当前上行子帧边界和该预置的未授权频谱的子 帧边界的差值, 并将该差值发送至用户设备。 这样, 用户设备可根据该差值找 到该预置的未授权频谱的子帧边界。
202、 所述基站接收来自所述用户设备的上行数据, 所述上行数据是所述 用户设备在确定所述未授权频谱空闲时使用所述未授权频语发送的;
用户设备在接收到来自基站的指示后,会对该指示所指示的预置的未授权 频谱进行侦听。 当用户设备确定该未授权的频谱空闲时,使用该未授权频谱对 基站发送上行数据。
用户设备向基站发送数据,基站通过获取用户设备同步信息, 以进行数据 接收。 当然, 基站也可以通过其他方式接收来自用户设备的上行数据, 在此不 作限制。 实际运用中, 基站有多种方法来获取用户设备的同步信息。 具体举例 来说, 基站可通过同步信号 preamble来获取用户设备的同步信息, 或者, 还 可以通过在用户设备所发送的子帧的 OFDM符号头部或者子帧头部来获取该 用户设备的同步信息。
本实施例中,通过基站向用户设备指示预置的未授权频谱, 以让用户设备 自己在该预置的未授权频谱内进行侦听,并在预置的未授权频谱空闲时自己决 策进行数据发送, 而无需通过基站对用户设备的调度才发送数据, 这样既满足
ESTI EN 301 893协议中设备需先侦听后发送数据的协议规范, 也避免了基站 在不了解用户设备干扰的情况下对用户设备做的一些盲调度。
优选地, 本实施例中,在步骤 202所述基站接收来自所述用户设备的上行 数据之后还包括:
203、 所述基站在所述预置的未授权频谱上或者在授权频谱上向所述用户 设备发送确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
接收完数据后, 基站会向用户设备发送用于确认接收到数据的确认信息。 具体举例来说, 该确认信息可以是 ACK信号。 实际运用中, 基站可通过授权 频谱或者非授权频谱中的下行链路在下行子帧上发送该确认信息。
优选的, 在该下行子帧中还携带有媒质接入控制层指示 ( Medium Access Control Index, MAC index ), 用于指示该数据包所属于的用户设备, 以及用于 指示确认信息的发送位置。 这样, 该用户设备可以根据该 MAC index的指示 来在对应的时频位置上接收该确认信息。
当然, 实际运用中, 基站也可以不向用户设备发送确认信息。 例如在广播 通信中, 基站可以不发送确认信号。
为便于理解,下面以一个实际应用场景对本实施例数据发送方法和数据接 ^:方法进行 述。
LTE无线通信系统中的演进形基站 eNB向 LTE用户设备发送指示, 该指 示用于指示用户设备进行侦听的时刻 n和未授权频域 RB1-RB50,以及用户设 备在发送上行数据时使用的传输时长 t。
LTE用户设备根据 eNB的指示, 在时刻 n开始对未授权频域 RB1-RB50 进行侦听。 当 LTE用户设备侦听到信道持续空闲时间大于或者等于 34us时, 即可确认该未授权频域空闲,并釆用 CSMA/CA方式使用该未授权频域向基站 发送上行数据。 同时, LTE用户设备根据基站发送的指示中的传输时长 t控制 所发送的数据包的数量,以保证发送上行数据所使用的时长不超过传输时长 t。
eNB通过同步信号 preamble来获取用户设备的同步信息, 以对 LTE用户 设备所发送的数据进行接收。 接收完数据后, eNB通过下行主载波或者辅载 波在下行子帧上发送确认信息 ACK信号, 其中该下行子帧中还携带有 MAC index,用于指示该数据包属于该 LTE用户设备, 并且指示 eNB发送给 LTE用 户设备的确认信息 ACK信号的发送位置。该 LTE用户设备根据该 MAC index 的指示来在对应的时频位置上接收该 ACK信号。
上面对本发明实施例中的数据发送方法和数据发送方法进行了描述,下面 对本发明实施例中的数据发送装置进行描述, 请参阅图 3, 本发明实施例中数 据发送装置 300包括:
接收模块 301, 用于接收来自基站的指示, 所述指示用于指示预置的未授 权频谱。
处理模块 302, 用于通过接收模块 301来侦听所述预置的未授权频谱是否 空闲;
发送模块 303, 用于在所述处理模块侦听到所述预置的未授权频谱空闲 时, 使用所述预置的未授权频谱向所述基站发送上行数据。
具体的, 该接受模块、处理模块和发送模块可以分别是用户终端内的接收 器、 处理器和发送器。 当然, 上述仅为举例描述, 并不作限制。 其中该用户终 端可以为手机、 个人电脑、 笔记本电脑、 平板电脑或者其他类型的终端, 具体 此处不做限定。
本发明实施例中,通过用户设备自己在基站所指示的预置的未授权频谱内 进行侦听, 并在预置的未授权频谱空闲时自己决策进行数据发送, 而无需在基 站的调度下才发送数据, 这样既满足 ESTI EN 301 893协议中设备需先侦听后 发送数据的协议规范,也避免了基站在不了解用户设备干扰的情况下对用户设 备做的一些盲调度。
优选的,发送模块 303具体用于在所述处理模块 302侦听到所述预置的未 授权频谱空闲时,釆用 CSMA/CA方式或者 CSMA/CD方式使用所述预置的未 授权频谱向所述基站发送上行数据。
这样, 可以降低多个用户设备发生碰撞的概率, 提升链路的性能, 避免了 和其他用户设备发生碰撞而造成的严重干扰的情况。
优选的, 所述处理模块 302还用于在到所述预置的未授权频谱不空闲时, 进行退避操作。 这样, 可以为其他用户设备的发送让出时频资源, 同时还可以为下一次信 道抢占做准备。
进一步, 优选的, 如果所述发送模块 303 具体用于在所述处理模块 302 侦听到所述预置的未授权频谱空闲, 釆用载波侦听多路访问 /碰撞避免方式使 用所述预置的未授权频谱向所述基站发送上行数据;所述处理模块 302具体用 于在侦听到所述预置的未授权频谱不空闲时, 釆用载波侦听多路访问 /碰撞避 免机制进行退避操作; 或者,
如果所述发送模块 303具体用于在所述处理模块 302侦听到所述预置的未 授权频谱空闲时, 釆用载波侦听多路访问 /碰撞检测方式使用所述预置的未授 权频谱向所述基站发送上行数据;所述处理模块 302具体用于在侦听到所述预 置的未授权频谱不空闲时, 釆用载波侦听多路访问 /碰撞检测机制进行退避操 作。
本发明的另一个实施例中数据发送装置包括:
接收模块, 用于接收来自基站的指示, 所述指示用于指示预置的未授权频 谱;
处理模块, 用于通过所述接收模块来侦听所述预置的未授权频谱是否空 闲;
发送模块, 用于在所述处理模块侦听到所述预置的未授权频谱空闲时,使 用所述预置的未授权频谱向所述基站发送上行数据。
本发明实施例中,所述接收模块还用于接收来自基站的对上行数据传输时 长的指示;所述处理模块还用于在所述发送模块使用所述预置的未授权频谱向 所述基站发送数据之前,根据所述上行数据传输时长确定待发送的上行数据的 数据量。
这样, 可以保证用户设备的数据发送时长不超过所述上行数据传输时长。 具体的, 该接受模块、处理模块和发送模块可以分别是用户终端内的接收 器、 处理器和发送器。 当然, 上述仅为举例描述, 并不作限制。 其中该用户终 端可以为手机、 个人电脑、 笔记本电脑、 平板电脑或者其他类型的终端, 具体 此处不做限定。
本发明的另一个实施例中数据发送装置包括: 接收模块, 用于接收来自基站的指示, 所述指示用于指示预置的未授权频 谱;
处理模块, 用于通过所述接收模块来侦听所述预置的未授权频谱是否空 闲;
发送模块, 用于在所述处理模块侦听到所述预置的未授权频谱空闲时,使 用所述预置的未授权频谱向所述基站发送上行数据。
本发明实施例中,接收模块还用于在所述发送模块使用所述预置的未授权 频谱向所述基站发送数据之后,釆用 Block-ACK机制或者正常的 ACK机制接 收来自所述基站的确认信息,所述确认信息用于指示所述基站接收到所述上行 数据。
具体的, 该接受模块、处理模块和发送模块可以分别是用户终端内的接收 器、 处理器和发送器。 当然, 上述仅为举例描述, 并不作限制。 其中该用户终 端可以为手机、 个人电脑、 笔记本电脑、 平板电脑或者其他类型的终端, 具体 此处不做限定。
上面对本发明实施例中的数据发送装置进行了描述,下面对本发明实施例 中的数据接收装置进行描述, 请参阅图 4, 本发明实施例中数据接收装置 400 包括:
发送模块 401, 用于向用户设备发送指示, 所述指示用于指示预置的未授 权频谱;
接收模块 402, 用于接收来自所述用户设备的上行数据, 所述上行数据是 所述用户设备在确定所述未授权频谱空闲时使用所述未授权频语发送的。
具体的, 该发送模块和接收模块可以分别是基站内的发送器和接收器。 当 然, 上述仅为举例描述, 并不作限制。
本实施例中,通过基站向用户设备指示预置的未授权频谱, 以让用户设备 自己在该预置的未授权频谱内进行侦听,并在预置的未授权频谱空闲时自己决 策进行数据发送, 而无需通过基站对用户设备的调度才发送数据, 这样既满足 ESTI EN 301 893协议中设备需先侦听后发送数据的协议规范, 也避免了基站 在不了解用户设备干扰的情况下对用户设备做的一些盲调度。
优选的, 本实施例中, 发送模块 401还用于在所述接收模块接收来自所 述用户设备的上行数据之后,在所述预置的未授权频谱上或者在授权频谱上向 所述用户设备发送确认信息,所述确认信息用于指示所述基站接收到所述上行 数据。
进一步,优选的, 所述发送模块 401具体用于通过下行子帧在所述预置的 未授权频谱上或者在授权频谱上向所述用户设备发送确认信息,其中所述下行 子帧携带有 MAC index, 用于指示所述确认信息的发送位置。
这样, 该用户设备可以根据该 MAC index的指示来在对应的时频位置上 接收该确认信息。
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 接辆合或通信连接可以是通过一些接口, 装置或单元的间接辆合或通信连接, 可以是电性, 机械或其它的形式。 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。上述集成的单元既可以釆用硬件的形式实现,也可以釆用软件功能单元的 形式实现。
所述集成的单元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全 部或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, 以上实施例仅用以说明本发明的技术方案, 而非对其限制; 尽 管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理 解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分 技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的本质脱 离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求
1、 一种数据发送方法, 其特征在于, 包括:
用户设备接收来自基站的指示, 所述指示用于指示预置的未授权频谱; 所述用户设备侦听所述预置的未授权频谱是否空闲,若所述预置的未授权 频谱空闲,则所述用户设备使用所述预置的未授权频谱向所述基站发送上行数 据。
2、 根据权利要求 1所述的数据发送方法, 其特征在于, 所述用户设备使 用所述预置的未授权频谱向所述基站发送上行数据具体包括:
所述用户设备釆用载波侦听多路访问 /碰撞避免方式或者载波侦听多路访 问 /碰撞检测方式使用所述预置的未授权频谱向所述基站发送上行数据。
3、 根据权利要求 1或 2所述的数据发送方法, 其特征在于, 若所述预置 的未授权频谱不空闲, 则所述用户设备进行退避操作。
4、 根据权利要求 3所述的数据发送方法, 其特征在于, 如果所述用户设 备釆用载波侦听多路访问 /碰撞避免方式使用所述预置的未授权频谱向所述基 站发送上行数据, 若所述预置的未授权频谱不空闲, 则所述用户设备釆用载波 侦听多路访问 /碰撞避免机制进行退避操作;
或者,
如果所述用户设备釆用载波侦听多路访问 /碰撞检测方式使用所述预置的 未授权频谱向所述基站发送上行数据, 若所述预置的未授权频谱不空闲, 则所 述用户设备釆用载波侦听多路访问 /碰撞检测机制进行退避操作。
5、根据权利要求 1所述的数据发送方法, 其特征在于, 所述方法还包括: 所述用户设备还接收来自基站的对上行数据传输时长的指示;
所述用户设备使用所述预置的未授权频谱向所述基站发送数据之前还包 括:
所述用户设备根据所述上行数据传输时长确定待发送的上行数据的数据 量。
6、 根据权利要求 1所述的数据发送方法, 其特征在于, 所述用户设备使 用所述预置的未授权频谱向所述基站发送上行数据之后还包括:
所述用户设备釆用块确认机制或者正常的确认机制接收来自所述基站的 确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
7、 一种数据发送装置, 其特征在于, 包括:
接收模块, 用于接收来自基站的指示, 所述指示用于指示预置的未授权频 谱;
处理模块, 用于通过所述接收模块来侦听所述预置的未授权频谱是否空 闲;
发送模块, 用于在所述处理模块侦听到所述预置的未授权频谱空闲时,使 用所述预置的未授权频谱向所述基站发送上行数据。
8、 根据权利要求 7所述的数据发送装置, 其特征在于,
所述发送模块具体用于在所述处理模块侦听到所述预置的未授权频谱空 闲时, 釆用载波侦听多路访问 /碰撞避免方式或者载波侦听多路访问 /碰撞检测 方式使用所述预置的未授权频谱向所述基站发送上行数据。
9、 根据权利要求 7或 8所述的数据发送装置, 其特征在于,
所述处理模块还用于在侦听到所述预置的未授权频谱不空闲时,进行退避 操作。
10、 根据权利要求 9所述的数据发送装置, 其特征在于,
如果所述发送模块具体用于在所述处理模块侦听到所述预置的未授权频 谱空闲, 釆用载波侦听多路访问 /碰撞避免方式使用所述预置的未授权频谱向 所述基站发送上行数据;所述处理模块具体用于在侦听到所述预置的未授权频 谱不空闲时, 釆用载波侦听多路访问 /碰撞避免机制进行退避操作; 或者, 如果所述发送模块具体用于在所述处理模块侦听到所述预置的未授权频 谱空闲时, 釆用载波侦听多路访问 /碰撞检测方式使用所述预置的未授权频谱 向所述基站发送上行数据;所述处理模块具体用于在侦听到所述预置的未授权 频谱不空闲时, 釆用载波侦听多路访问 /碰撞检测机制进行退避操作。
11、 根据权利要求 7所述的数据发送装置, 其特征在于,
所述接收模块还用于接收来自基站的对上行数据传输时长的指示; 所述处理模块还用于在所述发送模块使用所述预置的未授权频谱向所述 基站发送数据之前,根据所述上行数据传输时长确定待发送的上行数据的数据 量。
12、 根据权利要求 7所述的数据发送装置, 其特征在于,
所述接收模块还用于在所述发送模块使用所述预置的未授权频谱向所述 基站发送数据之后,釆用块确认机制或者正常的确认机制接收来自所述基站的 确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
13、 一种数据接收方法, 其特征在于, 包括:
基站向用户设备发送指示, 所述指示用于指示预置的未授权频谱; 所述基站接收来自所述用户设备的上行数据,所述上行数据是所述用户设 备在确定所述未授权频谱空闲时使用所述未授权频语发送的。
14、 根据权利要求 13所述的数据接收方法, 其特征在于, 所述基站接收 来自所述用户设备的上行数据之后还包括:
所述基站在所述预置的未授权频谱上或者在授权频谱上向所述用户设备 发送确认信息, 所述确认信息用于指示所述基站接收到所述上行数据。
15、 根据权利要求 14所述的数据接收方法, 其特征在于, 所述基站在所 述预置的未授权频谱上或者在授权频谱上向所述用户设备发送确认信息具体 包括:
所述基站通过下行子帧在所述预置的未授权频谱上或者在授权频谱上向 所述用户设备发送确认信息, 其中所述下行子帧携带有媒质接入控制层指示, 用于指示所述确认信息的发送位置。
16、 一种数据接收装置, 其特征在于, 包括:
发送模块, 用于向用户设备发送指示, 所述指示用于指示预置的未授权频 谱;
接收模块, 用于接收来自所述用户设备的上行数据, 所述上行数据是所述 用户设备在确定所述未授权频谱空闲时使用所述未授权频语发送的。
17、 根据权利要求 16所述的数据接收装置, 其特征在于,
所述发送模块还用于在所述接收模块接收来自所述用户设备的上行数据 之后,在所述预置的未授权频谱上或者在授权频谱上向所述用户设备发送确认 信息, 所述确认信息用于指示所述基站接收到所述上行数据。
18、 根据权利要求 17所述的数据接收装置, 其特征在于,
所述发送模块具体用于通过下行子帧在所述预置的未授权频谱上或者在 授权频谱上向所述用户设备发送确认信息,其中所述下行子帧携带有媒质接入 控制层指示, 用于指示所述确认信息的发送位置。
PCT/CN2014/079863 2014-06-13 2014-06-13 数据发送方法和装置、数据接收方法和装置 WO2015188380A1 (zh)

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