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WO2018188121A1 - Procédé et dispositif de transmission - Google Patents

Procédé et dispositif de transmission Download PDF

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Publication number
WO2018188121A1
WO2018188121A1 PCT/CN2017/082078 CN2017082078W WO2018188121A1 WO 2018188121 A1 WO2018188121 A1 WO 2018188121A1 CN 2017082078 W CN2017082078 W CN 2017082078W WO 2018188121 A1 WO2018188121 A1 WO 2018188121A1
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WIPO (PCT)
Prior art keywords
resource
service type
network device
terminal device
uplink data
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/CN2017/082078
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English (en)
Chinese (zh)
Inventor
丁志明
庄宏成
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
Original Assignee
Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201780051183.1A priority Critical patent/CN109644483B/zh
Publication of WO2018188121A1 publication Critical patent/WO2018188121A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present application relates to the field of communications and, more particularly, to a transmission method and apparatus.
  • the 3rd Generation Partnership Project (3GPP) is developing the fifth generation of wireless communication technology specifications (5G).
  • 5G mainly supports three major services, namely enhanced mobile broadband band (eMBB) service, ultra-reliable low-latency communication (URLLC) service, and mass machine type of communication (massive machine type of communication, mMTC) business.
  • eMBB enhanced mobile broadband band
  • URLLC ultra-reliable low-latency communication
  • mMTC massive machine type of communication
  • the eMBB service is, for example, a service that accesses the Internet by using mobile phone traffic.
  • the URLLC service is for example, industrial control, intelligent transportation, etc.
  • the URLLC service is characterized by high delay and reliability for data transmission.
  • the mMTC service means that in the future, a large number of machines will be connected to the Internet. These machines automatically perform communication without human intervention, such as smart meter reading services, and the meter automatically reports data periodically.
  • the URLLC service requires high delay and reliability for data transmission.
  • one of the goals of 5G is to achieve an end-to-end 1 millisecond delay.
  • a terminal device needs to obtain a dedicated resource required for transmitting uplink data from a network device side after two rounds of interaction with the network device, and then the uplink data is transmitted. A large delay will occur, which will not meet the low latency requirement of the URLLC service. Therefore, the concept of Grant Free transmission is proposed in 5G.
  • LTE Long Term Evolution
  • the unlicensed transmission is a technology in which the base station provides a time-frequency resource area for a group of users, and the time-frequency resource area includes several resource units. According to different multiple access methods, different resource units occupy different time-frequency resource blocks. For example, Orthogonal Frequency Division Multiple Access (OFDMA), or different resource elements may have a limited number of partial overlaps or complete overlaps in the frequency domain or the time domain or both in the frequency domain and the time domain, for example, Techniques such as Sparse Code Multiple Access (SCMA); the terminal device selects one or some resource units to send uplink data according to certain criteria (for example, random); the base station performs blind detection on the resource unit to restore the bearer. Upstream data.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SCMA Sparse Code Multiple Access
  • Such a time-frequency resource area may be referred to as an unlicensed resource, that is, a resource for unauthorized transmission.
  • an unlicensed resource that is, a resource for unauthorized transmission.
  • the terminal device can perform uplink data transmission without two-way interaction with the network device, which can effectively reduce the delay and meet the requirement of the low latency of the URLLC service.
  • the terminal device is competitively used, and there is also a possibility of resource conflict between different terminal devices. Therefore, the technology of the unlicensed transmission reduces the reliability while reducing the reliability and does not satisfy the high reliability requirement of the URLLC service.
  • K-repetition transmission techniques for remedies that may have low reliability defects for unauthorized transmission.
  • K-repeat transmission technology refers to the technique of transmitting multiple copies of the same data over the same block of time-frequency resources. Specifically, the data to be transmitted can be copied into multiple copies and more resource units are occupied in the same time-frequency resource area to simultaneously transmit the copies to improve reliability. Or the terminal device splits the data into multiple shares, each resource unit includes multiple copies of data, and each data is included in multiple resource units, so that the network device does not need to correctly receive all the resource units to obtain the completed data. , this is also a technique for transmitting multiple copies of data at the same time. Surgery.
  • one data is divided into four parts, labeled 1, 2, 3, and 4, respectively, using 4 resource units to transmit data, and 4 resource units containing data 1 and 2, 2, and 3, 3, and 4, 4, and 1 respectively.
  • the network device correctly decodes any three resource units, the completed data can be recovered, or only the two resource units including data 1 and 2, 3, and 4 can be correctly decoded, and the complete data can be correctly obtained.
  • K-repetition This technique of generating multiple copies of the same data simultaneously is called "K-repetition", where K is the number of copies.
  • K is the number of copies.
  • the data to be transmitted is copied into multiple copies, and multiple resource units are used in the same time-frequency resource area to transmit the copies to improve transmission reliability. Where K is the number of copies. It should be understood that the larger the value of K, the higher the reliability of data transmission.
  • the terminal device may need to perform an unauthorized transfer again to retransmit the last unsuccessfully transmitted data, which increases the delay. If the unlicensed transmission fails for several consecutive times, the low latency requirement is not actually met.
  • the authorization retransmission technology refers to that after the first unlicensed transmission failure, the base station allocates a dedicated transmission resource to the terminal device according to the resource requirement information of the terminal device, so that the terminal device transfers to the authorized transmission after the unauthorized transmission fails (grant-based transmission). ) to ensure that retransmissions are successful and avoid large delays caused by continuous transmission failures.
  • the network device provides the license-free resources provided by the terminal device into two parts, one for transmitting control information and the other for transmitting data.
  • the control information may include information such as size information and/or resource requirement information of the transmission data of the terminal device. Since the control information is relatively small in content and consumes less resources relative to the data transmitted by the terminal device, techniques such as low-rate transmission can be used, thereby enabling more reliable transmission than data transmission.
  • the reliable transmission of control information ensures that the network device can successfully receive control information as much as possible. Even if the terminal device cannot correctly receive the data portion, the terminal device may allocate the authorization resource to the terminal device according to the resource requirement information of the terminal device included in the successfully received control information, so that the terminal device may use the authorized resource to retransmit the previously failed transmission data. To achieve reliable transmission. From the first failed unlicensed transmission to the second authorized transmission, the total time spent is still much less than the time required for the two-round interaction in the existing specification to transmit data.
  • the present application provides a transmission method and device, which adopts different unlicensed transmission modes for data transmission for different service types, and can flexibly support transmission of multiple service types by using an unlicensed transmission technology to improve system spectrum utilization efficiency.
  • an unlicensed transmission technology is used to support transmission of high-reliability and low-latency service data.
  • the first-time use of the unlicensed transmission fails, if the network device can obtain the resource requirement of the terminal to transmit data, the dedicated resource is authorized to the terminal. Retransmit the data.
  • the unlicensed transmission technology can in fact be used to transmit more types of data, for example, the transmission of small data that is not sensitive to delay can use the unlicensed transmission technology to reduce the signaling overhead, and does not require "K-repetition" transmission.
  • K-repetition To improve reliability, there is no need to transfer the license to retransmit. If it fails, you only need to transfer the license again. For example, in the meter reading service, the data reported by the meter needs to be reliably uploaded to the server, but it is okay to delay the transmission in hundreds of milliseconds or even seconds.
  • the first aspect provides a transmission method, where the transmission method includes: determining, by the terminal device, uplink data to be sent The service type, the service type is one of at least two of the following types: a delayed-sensitive service type with a response, a delay-sensitive service type with no response, and a non-delay-sensitive service type with a response, The transmission mode corresponding to the different service types is different.
  • the terminal device sends the uplink data to the network device by using an unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type.
  • the service type of the uplink data may be divided into multiple types, and may include at least two of the foregoing three types.
  • other types may be used. This application is only described by taking one of the service types of the uplink data to be sent by the terminal device as the possible uplink data service.
  • the exempt resources are periodic.
  • the exempted resource in one cycle can be regarded as a resource zone, and the resource zone can be divided into multiple resource units according to any dimension or any two dimensions in the time domain, the frequency domain, or the code domain.
  • the specifications of the multiple resource units divided by the resource region may be the same, different from each other, or may not be identical.
  • a plurality of time-frequency resources in one resource region are not necessarily resource units having the same frequency domain width and time domain length.
  • a plurality of specifications of time-frequency resource units may be included in the same resource area.
  • different time-frequency resources in the same resource region may overlap partially or completely in the frequency domain and/or the time domain.
  • the resource area may also be referred to as a Contention-based Transmission Area (CTA).
  • CTA Contention-based Transmission Area
  • a resource unit of the resource region divided by any one of the time domain, the frequency domain, or the code domain or any two dimensions may also be referred to as a Contention-based Transmission Unit (CTU).
  • CTU Contention-based Transmission Unit
  • the unlicensed resource is allocated by the network device for the service type, and the unlicensed resources allocated for different service types are different.
  • the unlicensed resource is allocated for a certain type of service type, and can be used by multiple users, as long as the service type of the uplink data involved by the multiple users is the same type of service.
  • the unlicensed resource includes a plurality of first resource units for transmitting control information, and a plurality of second resource units for transmitting data; Transmitting, by the terminal device, the uplink data to the network device by using an unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type, where the terminal device uses at least at least one of the plurality of first resource units Transmitting, by the first resource unit, first control information to the network device, where the first control information includes information indicating a type of the service; and the terminal device utilizes at least one of the plurality of second resource units
  • the second resource unit sends the uplink data to the network device.
  • the exemption resource includes a first resource unit for transmitting control information and a second resource unit for transmitting data
  • the control information includes information for indicating a service type
  • the terminal device and the network device can be implemented.
  • Different types of services use different unlicensed transmission methods for data transmission, which improves the flexibility of data transmission, and can also avoid the waste of resources to a certain extent while satisfying the transmission requirements of the service, thereby realizing efficient use of resources.
  • the service type is the responding delay sensitive service type
  • the unlicensed resource includes multiple thirds for transmitting control information.
  • a resource unit and a plurality of fourth resource units for transmitting data the terminal device transmitting the uplink data to the network device by using an unlicensed resource allocated by the network device according to a transmission mode corresponding to the service type, including:
  • the terminal device sends the second control information to the network device by using the at least one third resource unit of the multiple resource units, where the second control information includes resource requirement information, and the resource requirement information is used by the And indicating, by the terminal device, the K1 copies of the uplink data, where K1 is greater than 1 by using at least K1 fourth resource units of the plurality of fourth resource units The integer.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and knowing that the network device is configured according to the resource requirement An authorization resource for information distribution; using the authorization resource, retransmitting the uplink data to the network device.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data transmission is successful.
  • the network device allocates a first type of exempt resources for a service with low latency and high reliability and requires response, and the terminal device and the network device adopt an authorized retransmission technology based on the first class of exempt resources.
  • the data is transmitted to meet the low latency and high reliability requirements of the service.
  • the service type is the responding delay sensitive service type, where the first control information further includes resource requirement information,
  • the resource requirement information is used to indicate the resource requirement of the uplink transmission;
  • the terminal device sends the uplink data to the network device by using at least one second resource unit of the multiple second resource units, including: the terminal The device transmits K1 copies of the uplink data to the network device by using at least K1 second resource units of the plurality of second resource units, where K1 is an integer greater than 1.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and knowing that the network device is configured according to the resource requirement An authorization resource for information distribution; using the authorization resource, retransmitting the uplink data to the network device.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data transmission is successful.
  • the data is transmitted by using an authorized retransmission technology, so that the low latency and high reliability requirements of the service can be met.
  • the service type is the non-responsive delay sensitive service type
  • the terminal device uses the network according to the transmission mode corresponding to the service type.
  • the unlicensed resource allocated by the device sends the uplink data to the network device, where the terminal device sends, by using the unlicensed resource, K2 copies of the uplink data to the network device, where K2 is an integer greater than 1.
  • the network device allocates a second type of exemption resource for a service with low latency and high reliability and does not need to respond, and the terminal device and the network device adopt "K-" based on the second type of exempted resource.
  • the transmission technology is repeated to transmit data, so that the low-latency and high-reliability requirements of the service can be met.
  • the network device since the network device does not need to send a response message to the terminal device, the signaling overhead can be reduced and resource waste can be avoided.
  • the service type is the non-responsive delay sensitive service type
  • the terminal device utilizes at least one of the multiple second resource units Transmitting, by the second resource unit, the uplink data to the network device, where: the terminal device uses the multiple second resource list At least K2 second resource units in the element send K2 copies of the uplink data to the network device, and K2 is an integer greater than 1.
  • the data is transmitted by using a “K-repetition” transmission technology, so that the low latency and high reliability requirements of the service can be met, and the network device does not need to be
  • the terminal device sends a response message, which can reduce signaling overhead and avoid waste of resources.
  • the service type is the non-delay sensitive service type that is responsive, and the terminal device uses the transmission mode corresponding to the service type.
  • the unlicensed resource allocated by the network device sends the uplink data to the network device, where the terminal device sends the copy of the uplink data to the network device by using the unlicensed resource.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and using the unauthorized resource in a next cycle.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data transmission is successful.
  • the network device allocates a third type of exempt resources for services that are not sensitive to delay but need to respond (for example, SDC services), and the terminal device and the network device are based on the third class of exempt resources.
  • the data is transmitted by using a "K-repetition" transmission technology, where K is a value of 1, and a response message indicating whether the data is successfully transmitted is sent to the terminal device, thereby satisfying the high reliability requirement of the service, and at the same time, since the terminal device only By using one resource unit to send uplink data to the network device, resource waste can be avoided.
  • the service type is the responding non-delay sensitive service type
  • the terminal device uses the multiple second resource units And transmitting, by the at least one second resource unit, the uplink data to the network device, where the terminal device sends the uplink data to the network device by using at least one second resource unit of the multiple second resource units a copy of it.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and using the unauthorized resource in a next cycle.
  • the transmitting method further includes: receiving a response message sent by the network device to indicate that the uplink data transmission is successful.
  • the data is transmitted on the unlicensed resource by using a "K-repeat" transmission technique, where K takes a value of 1, and is sent to the terminal device for A response message indicating whether the data is successfully transmitted, thereby satisfying the high reliability requirement of the service, and at the same time, since the terminal device transmits uplink data to the network device by using only one resource unit, resource waste can be avoided.
  • the transmission method includes at least one of the following information: the responsive delay-sensitive service type service is ultra-reliable low requiring a response
  • the time-delay communication aURLLC service the unresponsive delay-sensitive service type service is a super-reliable low-latency communication uURLLC service that does not require a response, and the responsive non-delay-sensitive service type service is not delayed. Sensitive small data communication SDC business.
  • the second aspect provides a transmission method, where the transmission method includes: determining, by the network device, a service type of uplink data to be sent by the terminal device, where the service type is one of at least two of the following types: Time-sensitive service type, non-responsive delay-sensitive service type, and non-delay-sensitive service type with response, among them,
  • the transmission mode corresponding to the different service types is different.
  • the network device receives the uplink data sent by the terminal device by using the unlicensed resource according to the transmission mode corresponding to the service type.
  • the terminal device and the network device determine the corresponding unlicensed transmission mode for data transmission according to the service type, thereby improving the flexibility of data transmission and also meeting the transmission requirements of the service. To a certain extent, avoid waste of resources.
  • a third aspect provides a terminal device, the terminal device being configured to perform the method in any one of the foregoing first aspect or the first aspect.
  • the terminal device may comprise means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a fourth aspect provides a terminal device, the terminal device comprising a memory and a processor, the memory for storing an instruction, the processor for executing the instruction stored by the memory, and the instruction stored in the memory Executing the method of causing the processor to perform the first aspect or any of the possible implementations of the first aspect.
  • a fifth aspect provides a terminal device, where the terminal device includes a memory, a processor, a receiver and a transmitter, the memory is configured to store an instruction, the processor is configured to execute the memory stored instruction, and the The execution of the instructions stored in the memory is such that the processor is configured to determine a service type of the uplink data to be sent, and the service type is one of at least two of the following types: a delay-sensitive service with response a type, a non-responsive delay-sensitive service type, and a non-delay-sensitive service type with a response, wherein different service types have different transmission modes; and the transmitter is configured to transmit according to the service type And transmitting the uplink data to the network device by using an unlicensed resource allocated by the network device.
  • a sixth aspect provides a computer readable storage medium having stored thereon a computer program that, when executed by a computer, implements the method of the first aspect or any of the possible implementations of the first aspect.
  • the computer may be the above terminal device.
  • a seventh aspect provides a network device, the network device being configured to perform the method in any of the possible implementations of the second aspect or the second aspect.
  • the network device may comprise means for performing the method of any of the possible implementations of the second aspect or the second aspect.
  • An eighth aspect provides a network device, the network device including a memory and a processor, the memory for storing instructions for executing the memory stored instructions, and for instructions stored in the memory Executing the method of causing the processor to perform the second aspect or any of the possible implementations of the second aspect.
  • a ninth aspect provides a network device, the network device comprising: a memory, a processor, a receiver and a transmitter, the memory is configured to store an instruction, the processor is configured to execute the instruction stored by the memory, and The execution of the instructions stored in the memory is such that the processor is configured to determine a service type of the uplink data to be sent by the terminal device, where the service type is one of at least two of the following types: a time-sensitive service type, a non-responsive delay-sensitive service type, and a non-delay-sensitive service type with a response, wherein different service types correspond to different transmission modes; and the receiver is configured to correspond to the service type The transmission mode uses the unlicensed resource to receive the uplink data sent by the terminal device.
  • a tenth aspect provides a computer readable storage medium having stored thereon a computer program, the program being implemented by a computer to implement the method of any of the possible implementations of the second aspect or the second aspect.
  • the computer may be the above network device.
  • FIG. 1 is a schematic flowchart of a transmission method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an unauthorized resource in an embodiment of the present invention.
  • FIG. 3 is another schematic diagram of an unauthorized resource in the embodiment of the present invention.
  • FIG. 4 is still another schematic diagram of an unauthorized resource in the embodiment of the present invention.
  • FIG. 5 is still another schematic diagram of an unauthorized resource in the embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 7 is another schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a network device according to an embodiment of the present invention.
  • FIG. 9 is another schematic block diagram of a network device according to an embodiment of the present invention.
  • the URLLC service can be further divided into two types of services, one is a URLLC service that needs to be answered by the receiver to ensure the transmission is successful. After the service fails to use the unlicensed resource, the network device needs to allocate the authorized resource to the network device. Data retransmission is performed; another is a URLLC service that does not require a response from the receiver. For example, a service in which the vehicle broadcasts its own state and coordinate information in real time in an intelligent transportation, even if the service fails to utilize the unauthorized resource, the network The device does not need to be assigned an authorization resource.
  • the URLLC service that needs to be answered by the receiver to ensure successful transmission is recorded as a acknowledgment of ultra-reliable low-latency communication (aURLLC) service, and the URLLC service that does not require the receiver to respond is recorded as Unacknowledged low-latency communication (unURLnowledged URLLC, uURLLC) service.
  • aURLLC ultra-reliable low-latency communication
  • uURLLC Unacknowledged low-latency communication
  • the uURLLC service does not respond, in order to improve the reliability of data transmission, a higher K value may be required when transmitting the uURLLC service using the "K-repeat" transmission technology.
  • the network device does not allocate dedicated transmission resources (ie, authorized resources) to the uURLLC service after the unauthorized transmission fails.
  • the application of the re-transmission technology to the aURLLC service can meet the requirements of low latency and high reliability of the aURLLC service.
  • applying the retransmission technology to the uURLLC service is not the best choice, because if the authorized retransmission technology is adopted, the terminal device needs to send the control information carrying the resource requirement information to the network device, which is equivalent to the transmission. Information that causes waste of resources. Therefore, for the uURLLC service, the "K-repeat" transmission technology is a reasonable choice.
  • the unlicensed transmission technology can be used to support URLLC services, and can also be used to support small data communication (SDC) services that are not sensitive to delays.
  • services that support the unlicensed transmission technology also include services that are not sensitive to delays.
  • some applications in the mMTC service transmit a small amount of data each time, which may require reliable transmission, but does not require immediate completion of the transmission, ie is not sensitive to delays.
  • the meter reading service the data reported by the meter needs to be reliably uploaded to the server, but it is okay to delay the transmission in hundreds of milliseconds or even seconds.
  • this small data service is not sensitive to delay, it is not necessary to use the "K-repetition" transmission technology, and only needs to use the unlicensed transmission technology. If the transmission fails, it can be retransmitted again. Until successful transmission.
  • the small data service is transmitted by using the unlicensed transmission technology, which eliminates the two-step interaction step in which the terminal device obtains the transmission resource in the traditional uplink transmission process, which greatly reduces the signaling overhead and is beneficial to improving the spectrum efficiency.
  • the authorized retransmission technology is used to implement the transmission of related data, which reduces the flexibility of data transmission for different service types.
  • Sex in addition, may also result in waste of resources.
  • an embodiment of the present invention provides a transmission method and device, which can improve data transmission flexibility by using different transmission modes for different service types, and can also meet the transmission requirements of services. At the same time, to a certain extent, avoid waste of resources.
  • the data transmission is implemented by using an authorized retransmission technology; for the uURLLC service, the data transmission is implemented by using a “K-repetition” transmission technology, and K is an integer greater than 1;
  • K-repeat For delay-insensitive SDC services, data transmission is implemented using a "K-repeat" transmission technique, and K is equal to one.
  • the transmission method provided by the embodiment of the present invention can improve the flexibility of data transmission, and can also avoid resource waste to a certain extent while satisfying the transmission requirement of the service.
  • FIG. 1 is a schematic flowchart of a transmission method 100 according to an embodiment of the present invention.
  • the transmission method 100 includes:
  • the terminal device determines a service type of uplink data to be sent, where the service type is one of at least two of the following types: a delay-sensitive service type with a response, a delay-sensitive service type with no response, and A non-delay-sensitive service type that responds, in which different service types correspond to different transmission modes.
  • the service type of the uplink data to be sent by the terminal device may include the following three types:
  • a delay-sensitive service type with a response the service representation of the responding delay-sensitive service type requires a service with low delay and high reliability, and which needs to be answered.
  • the responsive delay-sensitive service type of service includes a super-reliable low-latency communication URLLC service that needs to be answered to ensure successful transmission.
  • This service can be called acknowledged low-latency communication (ackletledged URLLC, aURLLC). business.
  • the responsive delay-sensitive service type service further includes a delay-sensitive Small Data Communication (SDC) service.
  • SDC Small Data Communication
  • the service of the unresponsive delay-sensitive service type is, for example, a URLLC service that does not require a response from the receiver, and may be referred to as an unacknowledged low-latency (URL) service.
  • the service of the unresponsive delay-sensitive service type is, for example, a service in which the vehicle broadcasts its own state or coordinate information in real time in the intelligent transportation.
  • a non-delay-sensitive service type that responds indicates a service that is insensitive to delay but needs to be answered.
  • the responsive non-delay sensitive service type service is a small data communication (SDC) service that is not sensitive to delay, such as a meter reading service.
  • SDC small data communication
  • mMTC small data communication
  • the mMTC service may require reliable transmission, but does not require immediate completion of the transfer.
  • the data reported by the meter needs to be reliably uploaded to the server, but it is okay to delay the transmission in hundreds of milliseconds or even seconds.
  • the type of service in the embodiment of the present invention may also be referred to as an unlicensed transmission service type (Grant Free Transmission Type, GFTT).
  • Grant Free Transmission Type GFTT
  • the service type of the uplink data may be divided into multiple types, and may include at least two of the foregoing three types. In addition, in addition to the above three types, other types may be used. In this embodiment, only one of the service types of the uplink data to be sent by the terminal device is a possible uplink data service type as an example.
  • the terminal device sends the uplink data to the network device by using an unlicensed resource allocated by the network device according to a transmission mode corresponding to the service type.
  • the terminal device can know in advance the unauthorized resources allocated by the terminal device.
  • the terminal device can obtain the unlicensed resource by receiving a notification message sent by the network device.
  • the notification message is, for example, a system broadcast message of a network device, a System Information Block (SIB), or Downlink Control Information (DCI).
  • SIB System Information Block
  • DCI Downlink Control Information
  • the notification message may include the following information: a period of the unlicensed resource, a time-frequency resource location of the unlicensed resource, and a CTU-related parameter of the unlicensed resource, where the CTU related parameter specifically includes a CTU specification and a transmit rate that can be used. Wait.
  • the transmission mode includes, but is not limited to, the following two options: a manner of selecting a resource for transmitting uplink data from an unlicensed resource, and a manner of transmitting the uplink data.
  • the transmission method includes the above-mentioned authorized retransmission technology, "K-repetition” transmission technology or unlicensed transmission technology (equivalent to "K-repetition” transmission technology with K value of 1). This transmission method can also be called an unlicensed transmission method.
  • the three different types of services have different transmission modes.
  • the service of the delay-sensitive service type that needs to respond needs to adopt the authorization retransmission technology described above, and needs the response of the receiver; the delay-sensitive service without response
  • the type of service needs to adopt the "K-repetition" transmission technology described above, and may not require the receiver to respond; the non-delay-sensitive service type of the response service can adopt the above-mentioned unlicensed transmission technology, and needs The receiver responds.
  • the correspondence between the service type and the transmission mode may be predetermined by the system, or may be, after the network device defines the correspondence between the service type and the transmission mode, notify the terminal device of the correspondence by signaling. .
  • both the terminal device and the network device are aware of the correspondence between the service type and the transmission mode.
  • the network device determines a service type of the uplink data to be sent by the terminal device, where the service type is one of at least two of the following types: a delay-sensitive service type with a response, and a delay-sensitive service type with no response. And a non-delay-sensitive service type with a response, in which different service types correspond to different transmission modes.
  • Step 110 and step 130 may not have a strict sequence.
  • the network device receives the uplink data sent by the terminal device by using an unlicensed resource according to the transmission mode corresponding to the service type.
  • the network device recovers the user data carried on the unlicensed resource by performing blind detection on the unlicensed resource.
  • the transmission method provided by the embodiment of the present invention can improve the flexibility of data transmission, and can also avoid resource waste to a certain extent while satisfying the transmission requirement of the service.
  • the transmission method 100 further includes: the network device assigning an unlicensed resource.
  • the unlicensed resource refers to a transmission resource that the terminal device can directly use when it needs to send uplink data, which is different from the transmission resource obtained by the terminal device in two rounds of interaction with the network device in the traditional cellular communication technology.
  • the exempted resource is periodically allocated, that is, an exempted resource appears every once in a while.
  • the time interval between two adjacent exempt resources can be referred to as the period of the unlicensed resource.
  • the CTU of the exempted resource area is described as an example of a time-frequency resource block.
  • the unlicensed resource is a terminal device for a plurality of different users, that is, the terminal devices of the plurality of users compete to use the unauthorized resource.
  • the network device may allocate different unlicensed resources for different types of services, that is, different types of services correspond to different exempt resources; or the network device may not distinguish different types of services when the unlicensed resources are allocated. That is, the different types of services correspond to the same unlicensed resource, but the unlicensed resource is divided into a first resource unit for transmitting control information and a second resource unit for transmitting data, where the control information is required to be carried in the control information. Information used to indicate the type of business. It should be noted that different types of services have different transmission modes regardless of whether the network device allocates the unlicensed resources for the service type.
  • a scheme in which a network device allocates an unlicensed resource for different service types will be described below with reference to FIG. 2 to FIG. 4, and a scheme for the network device to uniformly allocate an unlicensed resource is described in conjunction with FIG. 5.
  • the unlicensed resource is allocated by the network device for the service type, and the unlicensed resources allocated for different service types are different.
  • the unlicensed resource is allocated for a type of service type, and can be used by a terminal device of multiple users, and the service type of the uplink data involved by the multiple users is the service type.
  • the network device allocates a first type of unlicensed resource for the service of the responding delay sensitive service type, and the service request of the delayed delay sensitive service type requires low latency Reliable and requiring acknowledgment, the responsive delay sensitive service type of service such as the aURLLC service described above;
  • the first type of unavailability resource includes a plurality of third resource elements for transmitting control information and for transmission A plurality of fourth resource units of data.
  • the first type of unauthorized resources is as shown in FIG. 2. It should be understood that what is illustrated in Figure 2 is a schematic diagram of a first type of exempt resources in a cycle. As shown in FIG. 2, the first type of exempted resources is divided into a control information area and a data area, and the control information area includes a plurality of third resource units for transmitting control information, and the data area includes a plurality of fourth for transmitting data. Resource unit.
  • the first type of exempt-in resource has a corresponding response area, as shown in FIG. 2 .
  • the response area indicates a downlink resource area for the network device to send a response message indicating whether the data transmission is successful to the terminal device.
  • control information area is smaller than the data area.
  • the third resource unit occupies less spectrum resources than the fourth resource unit.
  • the third resource unit occupies less spectrum resources, and the number of the third resource units included in the control information area may be increased, so that the terminal device sends multiple copies of the control information on the multiple third resource units, thereby improving control.
  • the probability of successful information transmission is less than the number of the third resource units included in the control information area.
  • the service of the delayed delay sensitive service type is a service requiring low latency, high reliability, and needs to be answered, in order to meet the requirements of this type of service, the above-mentioned authorized retransmission technology should be used to implement this.
  • Type of service transmission In the authorized retransmission technology, the terminal device needs to report the resource requirement information of the terminal device to the network device before or at the same time using the unlicensed resource to send the uplink data.
  • the first type of exempted resources allocated for the responding delay sensitive service type includes a third resource unit for transmitting control information and a fourth resource unit for transmitting data, and is carried in The control information on the third resource unit needs to carry the end The resource requirement information of the terminal device, where the resource requirement information is used to indicate the amount of data to be sent by the terminal device or to indicate the resource requirement amount of the terminal device.
  • FIG. 2 is merely an example and not a limitation.
  • the first type of exempted resources may also be allocated according to the code division multiple access manner, and the first type of exempted resources may further include a code domain dimension, or may be between each resource unit in the first type of exempted resources. There is partial overlap and interleaving in the time domain, frequency domain or code domain.
  • the network device allocates a second type of unlicensed resource for the service of the unresponsive delay-sensitive service type, and the service requirement of the unresponsive delay-sensitive service type is low and the delay is high.
  • the second type of exempt resources includes resource elements for transmitting data.
  • the second type of unauthorized resources is as shown in FIG. 3. It should be understood that what is illustrated in Figure 3 is a schematic diagram of a second type of exempt resources in a cycle. As shown in FIG. 3, the second type of exempt resources includes a plurality of second resource units for transmitting data. The second type of exemption resource is different from the first type of exemption resource as shown in FIG. 2 in that it does not need to be divided into a control information area and a data area.
  • the second type of exempt resources does not have a corresponding response area.
  • the second type of exempt resources are only expressed from the time domain and frequency domain dimensions, and the individual resource elements do not overlap or interlace with each other
  • FIG. 3 is merely an example and is not a limitation.
  • the second type of exempted resources may also be allocated according to the multiple access manner, and the second type of exempted resources may further include a code domain dimension, or the resource elements of the second type of exempted resources may be in time. There is partial overlap and interleaving in the domain, frequency domain or code domain.
  • the network device allocates a third type of unlicensed resource to the service of the non-delay sensitive service type that responds, and the service pair delay of the responding non-delay sensitive service type Not sensitive, but requires a response, the third type of exempt resources includes resource elements for transmitting data.
  • the third type of unauthorized resources are as shown in FIG. 4. It should be understood that illustrated in Figure 4 is a schematic diagram of a third type of exempt resources in a cycle. As shown in FIG. 4, the third type of exempt resources includes a plurality of second resource units for transmitting data. The second type of exemption resource is different from the first type of exemption resource as shown in FIG. 2 in that it does not need to be divided into a control information area and a data area.
  • the third type of exempted resource has a corresponding response area, as shown in FIG. 4 .
  • the response area indicates a downlink resource area for the network device to send a response message indicating whether the data transmission is successful to the terminal device.
  • FIG. 4 is merely an example and not a limitation.
  • the third type of exempted resources may also be allocated according to the multiple access manner, and the third type of exempted resources may also include the code domain dimension, or the respective resource units in the third type of exempted resources may be in time. There is partial overlap and interleaving in the domain, frequency domain or code domain.
  • the unlicensed resource includes a plurality of first resource units for transmitting control information and a plurality of second resource units for transmitting data.
  • different types of services correspond to the same exempt resources.
  • the exemption resource is divided into a plurality of first resource units for transmitting control information and a plurality of second resource units for transmitting data, wherein the control information is required to carry information for indicating a service type.
  • different types of services correspond to the same unlicensed resource, different types of services correspond to different transmission modes.
  • the exemption resource is shown in Figure 5. It should be understood that FIG. 5 shows an illustration of a period of unauthorized resources. Figure. As shown in FIG. 5, the unauthorized resource is an unauthorized resource for supporting multiple service types.
  • the unlicensed resource may support the responding delay sensitive service type, the unacknowledged delay sensitive service type, and the responding non-delay sensitive service type described above.
  • the leftmost column of the time-frequency resource region corresponding to the unlicensed resource is a control information zone, and the control information zone includes a plurality of first resource units for transmitting control information. Because the control information content is small, the control information area requires less resources.
  • the right four columns of the time-frequency resource region are data regions, and the data region includes a plurality of second resource units for transmitting data. For example, each of the data regions shown in FIG. 5 represents a second resource unit. .
  • Each resource unit of the response area has a one-to-one correspondence with resource elements of the control information area in the time-frequency resource area corresponding to the unlicensed resource.
  • the unlicensed resource also has a corresponding response area, as shown in FIG. 5, the response area is represented by The time-frequency resource area of the response message sent by the network device to the terminal device.
  • the terminal device sends the uplink data to the network device by using the unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type, where the terminal device uses the multiple first resource units.
  • the at least one first resource unit sends first control information to the network device, the first control information includes information indicating the type of the service; the terminal device utilizes at least one second resource of the plurality of second resource units
  • the unit sends the uplink data to the network device.
  • the network device receives, by using the unlicensed resource, the uplink data sent by the terminal device according to the transmission mode corresponding to the service type, where the network device receives the terminal by using at least one first resource unit of the multiple first resource units.
  • the first control information sent by the device where the first control information includes information indicating the type of the service; the network device uses the at least one second resource unit of the plurality of second resource units to receive the uplink sent by the terminal device data.
  • the unlicensed resource includes a first resource unit for transmitting control information and a second resource unit for transmitting data, where the control information includes information for indicating a service type, and the terminal device and the network can be implemented.
  • the device uses different unlicensed transmission methods for different types of services for data transmission, so as to avoid the waste of resources to a certain extent while satisfying the transmission requirements of the service, thereby realizing efficient use of resources.
  • the service type is the responsive delay-sensitive service type
  • the unlicensed resource is an exemption for the responsive delay-sensitive service type shown in FIG. A resource
  • the unlicensed resource includes a plurality of third resource units for transmitting control information and a plurality of fourth resource units for transmitting data.
  • the terminal device sends the uplink data to the network device by using the unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type, where the terminal device uses at least one third resource of the multiple third resource units.
  • the unit sends the second control information to the network device, where the second control information includes resource requirement information, where the resource requirement information is used to indicate a resource requirement for uplink transmission; and the terminal device uses at least one of the plurality of fourth resource units K1 fourth resource units send K1 copies of the uplink data to the network device, and K1 is an integer greater than 1.
  • the network device receives, by using the unlicensed resource, the uplink data sent by the terminal device according to the transmission mode corresponding to the service type, where the network device receives the at least one third resource unit of the multiple third resource units.
  • the network device uses at least K1 of the plurality of fourth resource units
  • the fourth resource unit receives K1 copies of the uplink data sent by the terminal device, and K1 is an integer greater than 1.
  • the terminal device sends K1 copies of the uplink data on the N fourth resource units, where N is an integer greater than or equal to K1. In practical applications, it may be based on the transmission mode or coding mode of K1 copies of the uplink data. The number of fourth resource units used to carry the K1 copies is determined.
  • the terminal device may determine the value of K1 based on the characteristics of the response-type delay-sensitive service type, for example, the value of K1 is 3, that is, the value of K in the “K-repeat” is 3.
  • the network device may receive 3 copies of the uplink data on the 3 fourth resource units by blind detection.
  • the terminal device selects the fourth resource unit of different rows in different columns to transmit K1 copies of the uplink data.
  • the transmission success rate of the uplink data can be improved.
  • the network device can obtain the value of K1 before receiving the uplink data, and the manner of obtaining the value of K1 includes, but is not limited to, the following manner: the value of the system pre-defined K1; the control information sent by the terminal device carries the K1 Value information.
  • the network device may detect K1 copies carried on the fourth resource unit by performing blind detection on the fourth resource unit.
  • the network device can learn the transmission resources required for the terminal device to report the uplink data.
  • the second control information may further include transmission rate information used by the fourth resource unit or other information related to data transmission.
  • the transmitting method 100 further includes: when the uplink data is not successfully received, the network device sends, to the terminal device, a response message indicating that the uplink data is not successfully transmitted; the network device is configured according to The resource requirement information is used to allocate an authorization resource to the terminal device; the terminal device receives a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and the terminal device acquires an authorized resource that is allocated by the network device according to the resource requirement information.
  • the terminal device retransmits the uplink data to the network device by using the authorized resource; the network device uses the authorized resource to receive the uplink data retransmitted by the terminal device.
  • the network device may notify the terminal device of the authorized resource by using the response message.
  • the network device may notify the terminal device of the authorized resource, such as DCI, through other notification messages.
  • the transmitting method 100 further includes: when the network device determines that at least one of the K1 copies of the uplink data is successfully transmitted, sending, to the terminal device, indicating that the uplink data transmission is successful.
  • a reply message such as a NACK.
  • the first type of exempt resources further includes a corresponding response area, where the response area indicates a downlink resource area used by the network device to send an ACK or a NACK to the terminal device.
  • the resource unit of the corresponding response area does not need to correspond to all the fourth resource units in the data area, and only needs to correspond to the fourth resource unit on one of the columns in the data area.
  • the data area includes 3 columns, and the resource unit of the response area only needs to correspond one-to-one with the fourth resource unit of the first column of the data area.
  • the network device sends an ACK signal in the resource unit of the response area corresponding to the fourth resource unit of the row in which the data is located, regardless of which column of the data area is correctly received.
  • step 140 when the network device receives the uplink data and the control information sent by the terminal device on the first type of unauthorized resources, the network device first decodes the information carried on the third resource unit. If the control information carried on the third resource unit can be correctly obtained, the data carried on the fourth resource unit is decoded according to the control information. If any data copy transmitted on the fourth resource unit can be correctly decoded, it indicates that the data is successfully received (ie, the transmission is successful), and then sent to the terminal device on the corresponding ACK resource unit in the response area corresponding to the fourth resource unit. Send an ACK signal, Indicates correct reception.
  • the transmission resource requirements required by the terminal are obtained from the control information, and the authorized resources are allocated, and the NACK signal may be sent in the corresponding ACK resource unit in the response area, indicating that the transmission is unsuccessful and may be in the NACK.
  • the information carrying the authorized resource in the signal may not carry the information of the authorized resource in the NACK signal, but the information of the authorized resource is carried in the other notification message, for example, in the DCI.
  • the network device allocates a first type of exempt resources for a service with low latency and high reliability and requires response (for example, aURLLC service), and the terminal device and the network device are based on the first class of exempt resources.
  • a service with low latency and high reliability and requires response for example, aURLLC service
  • the service type is the responsive delay-sensitive service type, where the unlicensed resource is a first resource unit that includes multiple used for transmitting control information, as shown in FIG. An unlicensed resource of a plurality of second resource units for transmitting data.
  • the first control information further includes resource requirement information, where the resource requirement information is used to indicate a resource requirement for uplink transmission.
  • the second resource unit sends K1 copies of the uplink data to the network device, and K1 is an integer greater than 1.
  • the K1 second resource units receive K1 copies of the uplink data sent by the terminal device, and K1 is an integer greater than 1.
  • the terminal device sends K1 copies of the uplink data on the N second resource units, where N is an integer greater than or equal to K1.
  • N is an integer greater than or equal to K1.
  • the number of second resource units used to carry the uplink data may be determined according to a sending manner or an encoding manner of the uplink data.
  • an example of the non-authorized resource is as shown in FIG. 5, and an example is described when the service type is the response-sensitive delay-sensitive service type.
  • the terminal device selects the first resource unit indicated by aURLLC in FIG. 5 to send control information including the information of the delayed delay sensitive service type to the network device.
  • the control information may be detected on the first resource unit indicated by aURLLC in FIG. 5 by blind detection, and the service type of the data to be received is learned from the control information as having a response.
  • Delay-sensitive business type The terminal device transmits the uplink data on the three second resource units in the data area shown in FIG. 5 and the pattern of the first resource unit (the pattern shown by the left slash in FIG.
  • the network device can learn, by using the system predefined information or the control information, that the terminal device sends three copies of the uplink data by using the three second resource units, that is, the network device can know the value of K1.
  • the network device may also know the location of the second resource unit that carries the three copies of the uplink data, for example, the control information carries the location of the three second resource units. In this case, the network device may directly be in the three Three copies of the uplink data are detected on the second resource unit. Alternatively, the network device may also be unable to know the location of the second resource unit that carries the 3 copies of the uplink data. In this case, the network device may receive the uplink data by performing blind detection on the second resource unit in the data area. Copies.
  • the control information sent by the terminal device on the first resource unit indicated by the aURLLC in FIG. 5 further includes resource requirement information of the terminal device, where the resource requirement information is used to indicate the amount of data to be sent or used for Indicate the resource demand.
  • the resource requirement information may indicate the amount of data to be transmitted by the terminal device at this time, or the total amount of data to be transmitted, or the total amount of resources required.
  • control information part may further include transmission rate information used by the second resource unit or other information related to data transmission.
  • the ACK mentioned herein corresponds to a response message indicating that the uplink data transmission is successful
  • the NACK corresponds to a response message indicating that the uplink data is not successfully transmitted.
  • the transmitting method 100 further includes: when the uplink data is not successfully received, the network device sends, to the terminal device, a response message indicating that the uplink data is not successfully transmitted; the network device is configured according to The resource requirement information is used to allocate an authorization resource to the terminal device; the terminal device receives a response message sent by the network device to indicate that the uplink data is not successfully transmitted; and the terminal device acquires an authorized resource that is allocated by the network device according to the resource requirement information.
  • the terminal device retransmits the uplink data to the network device by using the authorized resource; the network device uses the authorized resource to receive the uplink data retransmitted by the terminal device.
  • the transmitting method 100 further includes: when the network device determines that at least one of the K1 copies of the uplink data is successfully transmitted, sending, to the terminal device, indicating that the uplink data transmission is successful. Reply message.
  • the network device After correctly receiving the control information, the network device receives K1 copies of the uplink data on the second resource unit; and then, according to the receiving condition of the uplink data, the corresponding resource unit in the response area, as shown in the response area in FIG.
  • An ACK signal or a NACK signal is transmitted on the same resource unit as the pattern of the first resource unit indicated by aURLLC.
  • the corresponding resource unit in the response area sends an ACK.
  • the corresponding resource unit in the response area transmits a NACK.
  • the network device In the case that the receiving is unsuccessful, the network device also allocates an authorized resource to the terminal device according to the resource requirement information in the control information, and notifies the terminal device of the authorized resource, so that the terminal device uses the authorized resource to retransmit the previously failed data.
  • This authorization resource is not shown in FIG.
  • the data is transmitted by using an authorized retransmission technology, so that the low latency and high reliability requirements of the service can be met.
  • the service type is the unresponsive delay-sensitive service type
  • the unlicensed resource is an exemption for the unresponsive delay-sensitive service type shown in FIG. Resources.
  • the terminal device sends the uplink data to the network device by using the unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type, and the terminal device sends the uplink data to the network device by using the unlicensed resource.
  • K2 copies of the upstream data, K2 is an integer greater than one.
  • the network device receives the uplink data sent by the terminal device by using the unlicensed resource according to the transmission mode corresponding to the service type, and the network device uses the unlicensed resource to receive the uplink data sent by the terminal device.
  • K2 copies, K2 is an integer greater than 1.
  • the terminal device sends K2 copies of the uplink data on the N resource units, where N is an integer greater than or equal to K2.
  • the number of resource units used to carry the K2 copies may be determined according to a sending manner or an encoding manner of K2 copies of the uplink data.
  • the terminal device may determine the value of K2 based on the characteristics of the non-response delay-sensitive service type, for example, the value of K2 is 4, that is, the value of K in the "K-repeat" is 4, For example, 4 second resource units are randomly selected from the second type of exempt resources to transmit 4 copies of the uplink data.
  • the network device can receive 4 copies of the uplink data on the 4 second resource units by blind detection.
  • the terminal device selects the second of different rows in different columns.
  • the resource unit transmits a K2 copy of the upstream data.
  • the transmission success rate of the uplink data can be improved.
  • the network device can obtain the value of K2 before receiving the uplink data, and the manner of obtaining the value of K2 includes, but is not limited to, the following manner: the value of the system pre-defined K2; the control information sent by the terminal device carries the K2 Value information. It should also be understood that the network device can locate the second resource unit carrying the copy of the uplink data by performing blind detection on the second resource unit.
  • the network device does not send a response message to the terminal device regardless of whether the uplink data sent by the terminal device to the network device is successfully transmitted.
  • the terminal device also does not detect the reply message.
  • the network device allocates a second type of exemption resource for a service with low latency and high reliability and does not need to respond (for example, a uURLLC service), and the terminal device and the network device are exempt based on the second class.
  • the resource uses the "K-duplicate" transmission technology to transmit data, so that the low-latency and high-reliability requirements of the service can be met.
  • the network device since the network device does not need to send a response message to the terminal device, the signaling overhead can be reduced and resource waste can be avoided.
  • the service type is the unresponsive delay-sensitive service type, where the unlicensed resource is a first resource unit that includes multiple used for transmitting control information, as shown in FIG. An unlicensed resource of a plurality of second resource units for transmitting data. And transmitting, by the terminal device, the uplink data to the network device by using the at least one second resource unit of the multiple resource units, where the terminal device uses at least K2 of the plurality of second resource units The second resource unit sends K2 copies of the uplink data to the network device, and K2 is an integer greater than 1.
  • the K2 second resource units receive K2 copies of the uplink data sent by the terminal device, and K2 is an integer greater than 1.
  • the terminal device sends K2 copies of the uplink data on the N second resource units, where N is an integer greater than or equal to K2.
  • the number of second resource units used to carry the uplink data may be determined according to a sending manner or an encoding manner of the uplink data.
  • the terminal device selects the first resource unit indicated by the uURLLC in FIG. 5 to send control information including the information of the delay-sensitive service type without answer to the network device.
  • the control information may be detected on the first resource unit indicated by the uURLLC in FIG. 5 by blind detection, and the service type of the data to be received is learned from the control information as no response.
  • Delay-sensitive business type The terminal device transmits the uplink data on the four second resource units in the data area shown in FIG. 5 and the pattern of the first resource unit (the pattern shown by the right slash in FIG.
  • the network device can learn, by using the system predefined information or the control information, that the terminal device sends four copies of the uplink data by using the four second resource units, that is, the network device can know the value of K4.
  • the network device may also know the location of the second resource unit that carries the four copies of the uplink data, for example, the location of the four second resource units is carried in the control information. In this case, the network device may directly be in the four Four copies of the uplink data are detected on the second resource unit. Alternatively, the network device may not be able to know the location of the second resource unit that carries the 4 copies of the uplink data. In this case, the network device may receive the uplink data by performing blind detection on the second resource unit in the data area. Copies.
  • the response area is acknowledged due to the service demand response of the unresponsive delay sensitive service type.
  • the resource unit is vacant. In other words, regardless of whether the uplink data sent by the terminal device to the network device is successfully transmitted, the network device does not send a response message to the terminal device, and the terminal device does not detect the response message.
  • the data is transmitted by using a K-repetition transmission technology, so that the low delay of the service can be satisfied.
  • High reliability requirements and because the network device does not need to send a response message to the terminal device, the signaling overhead can be reduced and resource waste can be avoided.
  • the service type is the responsive non-delay sensitive service type
  • the unlicensed resource is allocated to the responsive non-delay sensitive service type shown in FIG. Unauthorized resources.
  • the terminal device sends the uplink data to the network device by using the unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type, and the terminal device sends the uplink data to the network device by using the unlicensed resource.
  • a copy of the upstream data is a copy of the upstream data.
  • the network device receives the uplink data sent by the terminal device by using the unlicensed resource according to the transmission mode corresponding to the service type, and the network device uses the unlicensed resource to receive the uplink data sent by the terminal device.
  • a copy the network device receives the uplink data sent by the terminal device by using the unlicensed resource according to the transmission mode corresponding to the service type, and the network device uses the unlicensed resource to receive the uplink data sent by the terminal device.
  • the terminal device sends uplink data on the N second resource units, where N is an integer greater than or equal to 1.
  • N is an integer greater than or equal to 1.
  • the number of second resource units used to carry the uplink data may be determined according to a sending manner or an encoding manner of the uplink data.
  • step 120 the terminal device randomly selects the resource unit in the third type of unauthorized resources, and sends the uplink data to the network device. It should be understood that since the service corresponding delay of the responding non-delay sensitive service type is not sensitive, there is no need to send multiple copies of the uplink data.
  • the transmitting method 100 further includes: when the uplink data is not successfully received, the network device sends, to the terminal device, a response message indicating that the uplink data is not successfully transmitted; the terminal device receives a response message sent by the network device to indicate that the uplink data is not successfully transmitted; the terminal device retransmits the uplink data to the network device by using an unlicensed resource of a next period; the network device uses the authorized resource of the next period to receive The uplink data retransmitted by the terminal device.
  • the transmitting method 100 further includes: when the network device determines that the uplink data transmission is successful, sending, to the terminal device, a response message indicating that the uplink data transmission is successful.
  • the network device allocates a third type of exempt resources for services that are not sensitive to delay but need to respond (for example, SDC services), and the terminal device and the network device are based on the third class of exempt resources. Transmitting data by using a "K-repeat" transmission technique, where K is a value of 1, and transmitting a response message indicating whether the data is successfully transmitted to the terminal device, thereby being able to satisfy the highly reliable requirement of the service, and at the same time
  • K is a value of 1
  • the use of only one resource unit to send uplink data to the network device can avoid waste of resources.
  • the service type is the responding non-delay sensitive service type
  • the unlicensed resource is a first resource unit that includes multiple used for transmitting control information, as shown in FIG.
  • An unlicensed resource with a plurality of second resource units for transmitting data.
  • the second resource unit sends a copy of the uplink data to the network device.
  • the uplink data sent by the terminal device includes: the network device receiving, by using at least one second resource unit of the plurality of second resource units, a copy of the uplink data sent by the terminal device.
  • the terminal device sends one copy of the uplink data on the N second resource units, where N is an integer greater than or equal to 1.
  • N is an integer greater than or equal to 1.
  • the number of second resource units used to carry the uplink data may be determined according to a sending manner or an encoding manner of the uplink data.
  • the terminal device selects the first resource unit indicated by the SDC in FIG. 5 to send control information including the information of the non-delay sensitive service type with the response to the network device.
  • the control information may be detected on the first resource unit indicated by the SDC in FIG. 5 by blind detection, and the service type of the data to be received is learned from the control information as having a response.
  • Non-delay sensitive business type The terminal device transmits uplink data on the same one resource unit as the pattern of the data area shown in FIG.
  • the network device can learn, by using the system predefined information or the control information, that the terminal device sends the uplink data by using one second resource unit.
  • the network device may also know the location of the second resource unit that carries the uplink data, for example, the control information carries the location of the second resource unit. In this case, the network device may directly detect the uplink data on the second resource unit. . Alternatively, the network device may not be able to know the location of the second resource unit that carries the uplink data. In this case, the network device may receive the uplink data by performing blind detection on the second resource unit in the data area.
  • FIG. 5 there is a resource unit in the response area corresponding to the first resource unit indicated by the SDC in FIG. 5 for transmitting an ACK or a NACK, for example, in the response area shown in FIG. A resource unit whose pattern is identical to the pattern of the first resource unit referred to by the SDC.
  • the transmitting method 100 further includes: when the uplink data is not successfully received, the network device sends, to the terminal device, a response message indicating that the uplink data is not successfully transmitted; the terminal device receives a response message sent by the network device to indicate that the uplink data is not successfully transmitted; the terminal device retransmits the uplink data to the network device by using an unlicensed resource of a next period; the network device uses the authorized resource of the next period to receive The uplink data retransmitted by the terminal device.
  • the transmitting method 100 further includes: when the network device determines that the uplink data transmission is successful, sending, to the terminal device, a response message indicating that the uplink data transmission is successful.
  • the network device After correctly receiving the control information, the network device receives the uplink data on the second resource unit; and then according to the receiving condition of the uplink data, the corresponding resource unit in the response area, as shown in the response area in FIG. An ACK signal or a NACK signal is transmitted on the same resource unit of the first resource unit.
  • the corresponding resource unit in the response area sends an ACK.
  • the corresponding resource unit in the response area transmits a NACK. It should be noted that, in the case that the receiving is unsuccessful, the network device does not allocate an authorized resource to the terminal device.
  • data is transmitted by using a K-repetition transmission technology, where K is 1 and is forwarded to the terminal.
  • K is 1
  • the device sends a response message indicating whether the data is successfully transmitted, so that the high reliability requirement of the service can be satisfied, and at the same time, since the terminal device uses only one resource unit to send uplink data to the network device, resource waste can be avoided.
  • FIG. 6 is a schematic block diagram of a terminal device 200 according to an embodiment of the present invention.
  • the terminal device 200 includes:
  • the processing module 210 is configured to determine a service type of the uplink data to be sent, where the service type is one of at least two of the following types: a delay-sensitive service type with a response, and a delay-sensitive service type with no response, And a non-delay-sensitive service type with a response, wherein different service types have different transmission modes;
  • the sending module 220 is configured to send the uplink data to the network device by using an unlicensed resource allocated by the network device according to the transmission mode corresponding to the service type.
  • the flexibility of data transmission can be improved, and the waste of resources can be avoided to a certain extent while satisfying the transmission requirement of the service.
  • the unlicensed resource is allocated by the processing module 210 for the service type, and the unlicensed resources allocated for different service types are different.
  • the unlicensed resource includes multiple first resource units for transmitting control information and multiple second resource units for transmitting data;
  • the sending module 220 is specifically configured to:
  • the service type is the responding delay sensitive service type, where the unlicensed resource includes multiple third resource units for transmitting control information, and multiple used for transmitting data.
  • the sending module 220 is specifically configured to:
  • K1 copies of the uplink data are transmitted to the network device by using at least K1 fourth resource units of the plurality of fourth resource units, and K1 is an integer greater than 1.
  • the service type is the responding delay sensitive service type
  • the first control information further includes resource requirement information, where the resource requirement information is used to indicate a resource requirement for uplink transmission;
  • the sending module 220 is specifically configured to:
  • K1 copies of the uplink data are transmitted to the network device by using at least K1 second resource units of the plurality of second resource units, and K1 is an integer greater than 1.
  • the terminal device further includes:
  • a receiving module configured to receive a response message sent by the network device to indicate that the uplink data is not successfully transmitted
  • the processing module 210 is further configured to: obtain an authorization resource that is allocated by the network device according to the resource requirement information;
  • the sending module 220 is further configured to resend the uplink data to the network device by using the authorized resource.
  • the service type is the unresponsive delay sensitive service type
  • the sending module 220 is specifically configured to send, by using the unlicensed resource, K2 copies of the uplink data to the network device, where K2 is an integer greater than 1.
  • the service type is the unresponsive delay sensitive service type
  • the sending module 220 is specifically configured to:
  • K2 copies of the uplink data are transmitted to the network device by using at least K2 second resource units of the plurality of second resource units, and K2 is an integer greater than 1.
  • the service type is the responding non-delay sensitive service type
  • the sending module 220 is specifically configured to send, by using the unlicensed resource, a copy of the uplink data to the network device.
  • the service type is the responding non-delay sensitive service type
  • the sending module 220 is specifically configured to:
  • the terminal device further includes:
  • a receiving module configured to receive a response message sent by the network device to indicate that the uplink data is not successfully transmitted
  • the sending module 220 is further configured to resend the uplink data to the network device by using an unauthorized resource of the next period.
  • the responsive delay-sensitive service type service is an ultra-reliable low-latency communication aURLLC service that needs to respond, and the unresponsive delay-sensitive service type service does not need to respond.
  • the ultra-reliable low-latency communication uURLLC service, the responsive non-delay-sensitive service type of service is a small data communication SDC service that is not sensitive to delay.
  • processing module in the embodiment of the present invention may be implemented by a processor or a processor related circuit component
  • the sending module may be implemented by a transmitter or a transmitter related circuit component
  • the receiving module may be implemented by a receiver or a receiver related circuit component.
  • an embodiment of the present invention further provides a terminal device 300.
  • the terminal device 300 includes a memory 320, a processor 310, a receiver 330, and a transmitter 340.
  • the memory 320 is used to store instructions.
  • the processor 310 is configured to store instructions. The instructions for executing the memory store and the execution of the instructions stored in the memory are such that:
  • the processor 320 is configured to determine a service type of the uplink data to be sent, where the service type is one of at least two of the following types: a delay-sensitive service type with a response, and a delay-sensitive service type with no response. And a non-delay-sensitive service type with a response, wherein different service types correspond to different transmission modes;
  • the transmitter 330 is configured to send the uplink data to the network device by using an unlicensed resource allocated by the network device according to a transmission mode corresponding to the service type.
  • the flexibility of data transmission can be improved, and the waste of resources can be avoided to a certain extent while satisfying the transmission requirement of the service.
  • terminal device 200 shown in FIG. 6 or the terminal device 300 shown in FIG. 7 may be used to perform operations or processes related to the terminal device in the foregoing method embodiments, and the respective modules in the terminal device 200 or the terminal device 300 The operations and/or functions are respectively implemented in order to implement the corresponding processes in the foregoing method embodiments, and are not described herein for brevity.
  • FIG. 8 is a schematic flowchart of a network device 400 according to an embodiment of the present disclosure.
  • the network device 400 includes:
  • the processing module 410 is configured to determine a service type of the uplink data to be sent by the terminal device, where the service type is one of at least two of the following types: a delayed-sensitive service type with a response, and a delay-sensitive service with no response. Type, and non-delay-sensitive service type with response, where different service types correspond to different transmission modes;
  • the receiving module 420 is configured to receive the uplink data sent by the terminal device by using an unlicensed resource according to the transmission mode corresponding to the service type.
  • the flexibility of data transmission can be improved, and the waste of resources can be avoided to a certain extent while satisfying the transmission requirement of the service.
  • the unlicensed resource is allocated by the processing module 410 for the service type, and the unlicensed resources allocated for different service types are different.
  • the unlicensed resource includes multiple first resource units for transmitting control information and multiple second resource units for transmitting data;
  • the receiving module 420 is specifically configured to:
  • the service type is the responding delay sensitive service type, where the unlicensed resource includes multiple third resource units for transmitting control information, and multiple used for transmitting data.
  • the receiving module 420 is specifically configured to:
  • the at least one third resource unit And receiving, by the at least one third resource unit, the second control information that is sent by the terminal device, where the second control information includes resource requirement information, where the resource requirement information is used to indicate resource requirements for uplink transmission. the amount;
  • the service type is the responding delay sensitive service type
  • the first control information further includes resource requirement information, where the resource requirement information is used to indicate a resource requirement for uplink transmission;
  • the receiving module 420 is specifically configured to:
  • the network device further includes:
  • a sending module configured to send, to the terminal device, a response message indicating that the uplink data is not successfully transmitted, when the uplink data is not successfully received;
  • a resource allocation module configured to allocate an authorization resource to the terminal device according to the resource requirement information
  • the receiving module 420 is further configured to receive, by using the authorized resource, the uplink data that is retransmitted by the terminal device.
  • the service type is the unresponsive delay-sensitive service type
  • the receiving module 420 is specifically configured to receive, by using the unlicensed resource, the uplink data sent by the terminal device.
  • K2 copies, K2 is an integer greater than 1.
  • the service type is the unresponsive delay sensitive service type
  • the receiving module 420 is specifically configured to:
  • the service type is the responding non-delay sensitive service type
  • the receiving module 420 is specifically configured to receive, by using the unlicensed resource, a copy of the uplink data sent by the terminal device.
  • the service type is the responding non-delay sensitive service type
  • the receiving module 420 is specifically configured to:
  • the network device further includes:
  • a sending module configured to send, to the terminal device, a response message indicating that the uplink data is not successfully transmitted, when the uplink data is not successfully received;
  • the receiving module 420 is further configured to receive, by using an authorization resource of a next period, the uplink data that is retransmitted by the terminal device.
  • the responsive delay-sensitive service type service is an ultra-reliable low-latency communication aURLLC service that needs to respond, and the unresponsive delay-sensitive service type service does not need to respond.
  • the ultra-reliable low-latency communication uURLLC service, the responsive non-delay-sensitive service type of service is a small data communication SDC service that is not sensitive to delay.
  • processing module in the embodiment of the present invention may be implemented by a processor or a processor related circuit component
  • the sending module may be implemented by a transmitter or a transmitter related circuit component
  • the receiving module may be implemented by a receiver or a receiver related circuit component.
  • an embodiment of the present invention further provides a network device 500.
  • the network device 500 includes a memory 520, a processor 510, a receiver 530, and a transmitter 540.
  • the memory 520 is configured to store an instruction
  • the processor 510 is configured to store an instruction.
  • the instructions for executing the memory store and the execution of the instructions stored in the memory are such that:
  • the processor 510 is configured to determine a service type of uplink data to be sent by the terminal device, where the service type is one of at least two of the following types: a delay-sensitive service type with a response, and a delay-sensitive response without a response. Service type, and non-delay-sensitive service type with response, where different service types correspond to different transmission modes;
  • the receiver 530 is configured to receive uplink data sent by the terminal device by using an unlicensed resource according to a transmission mode corresponding to the service type.
  • the flexibility of data transmission can be improved, and the waste of resources can be avoided to a certain extent while satisfying the transmission requirement of the service.
  • the network device 400 shown in FIG. 8 or the network device 500 shown in FIG. 9 may be used to perform operations or processes related to network devices in the foregoing method embodiments, and various modes in the network device 400 or the network device 500.
  • the operations and/or functions of the blocks are respectively implemented in order to implement the corresponding processes in the foregoing method embodiments. For brevity, details are not described herein again.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer program is stored, and when the computer program is executed by the computer, the method flow related to the terminal device in the foregoing method embodiment is implemented.
  • the computer may be the above terminal device.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer program is stored, and the computer program is executed by the computer to implement a method flow related to the network device in the foregoing method embodiment.
  • the computer may be the above network device.
  • processors mentioned in the embodiment of the present invention may be a central processing unit (CPU), and may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits ( Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory referred to in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM). SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchronous Connection Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (DR RAM).
  • processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.
  • memories described herein are intended to comprise, without being limited to, these and any other suitable types of memory.
  • the size of the serial 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, and may be in an 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 application 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 application 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 application.
  • 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, which can store program codes. .
  • each device embodiment may refer to related methods in the related method embodiments. Partial understanding.
  • the device structure diagrams given in the various device embodiments of the present application show only a simplified design of the corresponding device.
  • the device may include any number of transmitters, receivers, processors, memories, etc., to implement the functions or operations performed by the device in various embodiments of the present invention, and all devices that can implement the present application All are within the scope of this application.

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

Abstract

La présente invention concerne un procédé et un dispositif de transmission. Le procédé de transmission comprend les étapes suivantes : un dispositif terminal détermine le type de service de données de liaison montante à envoyer, le type de service étant un type parmi au moins deux des types suivants : un type de service sensible aux retards avec réponse, un type de service sensible aux retards sans réponse et un type de service non sensible aux retards avec réponse, différents types de services correspondant à différents modes de transmission ; et le dispositif terminal envoie, selon le mode de transmission correspondant au type de service, les données de liaison montante à un dispositif de réseau à l'aide de ressources exemptes d'octroi attribuées par le dispositif de réseau, ce qui améliore la flexibilité de la transmission des données.
PCT/CN2017/082078 2017-04-12 2017-04-26 Procédé et dispositif de transmission Ceased WO2018188121A1 (fr)

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CN113630466B (zh) * 2021-08-11 2023-09-26 深圳市欧瑞博科技股份有限公司 数据传输方法、系统、电子设备及存储介质

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