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WO2019029473A1 - Procédé, dispositif terminal et dispositif de réseau de transmission de données - Google Patents

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

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Publication number
WO2019029473A1
WO2019029473A1 PCT/CN2018/098929 CN2018098929W WO2019029473A1 WO 2019029473 A1 WO2019029473 A1 WO 2019029473A1 CN 2018098929 W CN2018098929 W CN 2018098929W WO 2019029473 A1 WO2019029473 A1 WO 2019029473A1
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tbs
adjustment factor
terminal device
mcs
network device
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Chinese (zh)
Inventor
苏立焱
官磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/22—Negotiating communication rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a method, a terminal device, and a network device for transmitting data.
  • LTE long term evolution
  • traffic transmission is based on base station scheduling.
  • the smallest unit of base station scheduling is one transport block (TB).
  • the base station calculates a transport block size (TBS) according to a well-known algorithm, and carries the determined TBS information, the MCS, and the resource allocation information in downlink control information (DCI).
  • TBS transport block size
  • the terminal device receives the DCI and derives the TBS.
  • the downlink data is received and demodulated in combination with the resource allocation information and the MCS, or the uplink data is transmitted.
  • the determination of the TBS depends only on the number of physical resource blocks (PRBs) allocated by the MCS and the network device to the terminal device.
  • the terminal device checks the MCS table and the TBS table according to the number of PRBs and the MCS, and can determine the TBS configured by the network device.
  • PRBs physical resource blocks
  • the present application provides a method for transmitting data, which can realize data transmission with low code rate.
  • a first aspect provides a method for transmitting data, the method comprising: receiving, by a terminal device, downlink control information from a network device, where the downlink control information includes resource allocation information of a data channel, indication information of a modulation and coding scheme MCS, and an adjustment factor.
  • the indication information, the indication information of the adjustment factor indicates an adjustment factor in the set of adjustment factors of the high-level signaling configuration, the adjustment factor is used to determine the first transport block size TBS of the data channel; and the indication information of the terminal device according to the adjustment factor Determining an adjustment factor from the set of values of the adjustment factor; the terminal device determines, according to the indication information of the MCS, an MCS index from the set of candidate MCS indexes, where the MCS index set includes at least two candidate MCS indexes; and the terminal device allocates information according to the resources. And determining, by the MCS index and the adjustment factor, the first TBS; the terminal device performs reception or transmission of the data channel according to the first TBS.
  • the method further includes: the first configuration information includes at least two candidate value sets of the adjustment factor; and the terminal device according to the MCS index, the candidate MCS index set Determining a set of the adjustment factors by determining a correspondence between the at least two candidate MCS indexes and the at least two candidate value sets of the adjustment factor.
  • the set of adjustment factors is a subset of the adjustment factor resource pool, and the adjustment factor resource pool includes at least one.
  • the terminal device determines the first TBS according to the resource allocation information, the MCS, and the adjustment factor, including: the terminal device calculates the first TBS according to the following formula:
  • the N PRB is the number of PRBs allocated by the network device to the terminal device. or The number of REs used to carry downlink and uplink data on one PRB in a time slot, ⁇ is the number of layers mapped by the data channel, Q m is a modulation order, R is a code rate, and ⁇ DL and ⁇ UL are respectively The adjustment factor used for downlink and uplink.
  • the terminal device determines the first TBS according to the resource allocation information, the MCS, and the adjustment factor, where the terminal device calculates the second TBS according to the following formula:
  • the N PRB is the number of PRBs allocated by the network device to the terminal device. or The number of REs used to carry downlink and uplink data on one PRB in one slot, ⁇ is the number of layers mapped by the data channel, Q m is the modulation order, R is the code rate, and ⁇ DL and ⁇ UL are respectively downlink And the adjusting factor used by the uplink; the terminal device selects the first TBS from the TBS set according to the second TBS, where the TBS set is predefined or configured by high layer signaling.
  • the first TBS and the second TBS meet the first mapping relationship, where the first mapping relationship includes any one of the following: the first TBS is the closest to the second in the TBS set. The value of the TBS; the first TBS is a maximum value of the TBS set that is not greater than the second TBS; the first TBS is a minimum value of the TBS set that is not less than the second TBS.
  • the terminal device selects the first TBS from a TBS set according to a second TBS, where the first TBS is the closest to the TBS set. a value of the second TBS; or, the first TBS is not greater than a maximum value of the second TBS in the TBS set; or the first TBS is not less than the second TBS in the TBS set The minimum value.
  • a second aspect provides a method for transmitting data, where the method includes: the network device sends downlink control information to the terminal device, where the downlink control information includes resource allocation information of the data channel, indication information of the modulation and coding scheme MCS, and an adjustment factor.
  • the indication information, the indication information of the MCS is used to determine an MCS index from the candidate MCS index set, where the candidate MCS index set includes at least two candidate MCS indexes, and the indication information of the adjustment factor indicates the value set in the adjustment factor of the high layer configuration.
  • An adjustment factor, the adjustment factor is used to determine a first transport block size TBS of the data channel; and the network device performs transmission or reception of the data channel according to the first TBS and the terminal device.
  • the method further includes: the network device sending the first configuration information to the terminal device by using the high layer signaling, where the first configuration information includes at least two candidate values of the adjustment factor And the set of the adjustment factors is determined according to the correspondence between the at least two candidate MCS indexes in the MCS index, the candidate MCS index set, and the at least two candidate value sets of the adjustment factor.
  • the set of adjustment factors is a subset of the adjustment factor resource pool, and the adjustment factor resource pool includes at least one.
  • the first TBS can be calculated according to the following formula:
  • the N PRB is the number of PRBs allocated by the network device to the terminal device. or The number of REs used to carry downlink and uplink data on one PRB in one slot, ⁇ is the number of layers mapped by the data channel, Q m is the modulation order, R is the code rate, and ⁇ DL and ⁇ UL are respectively downlink
  • the first TBS can be determined as follows: calculating the second TBS according to the following formula:
  • the N PRB is the number of PRBs allocated by the network device to the terminal device. or The number of REs used to carry downlink and uplink data on one PRB in one slot, ⁇ is the number of layers mapped by the data channel, Q m is the modulation order, R is the code rate, and ⁇ DL and ⁇ UL are respectively downlink And the adjusting factor used by the uplink; selecting the first TBS from the TBS set according to the second TBS, where the TBS set is predefined or configured by high layer signaling.
  • the first TBS and the second TBS meet the first mapping relationship, where the first mapping relationship includes any one of the following: the first TBS is the closest to the second in the TBS set. The value of the TBS; the first TBS is a maximum value of the TBS set that is not greater than the second TBS; the first TBS is a minimum value of the TBS set that is not less than the second TBS.
  • the network device selects the first TBS from a TBS set according to a second TBS, where the first TBS is the closest to the TBS set. a value of the second TBS; or, the first TBS is not greater than a maximum value of the second TBS in the TBS set; or the first TBS is not less than the second TBS in the TBS set The minimum value.
  • the present application provides a terminal device having a function of implementing a terminal device in a method design of the above first aspect.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the application provides a network device having the function of implementing the network device in the method design of the foregoing second aspect.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the application provides a terminal device, where the terminal device includes a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from the memory such that the terminal device performs the method of the first aspect above.
  • the application provides a network device including a transceiver, a processor, and a memory.
  • the processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from memory such that the network device performs the method of the second aspect.
  • the present application provides a communication device, which may be a terminal device in the above method design, or a chip disposed in the terminal device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any of the possible aspects of the first aspect or the second aspect described above.
  • the present application provides a communication device, where the communication device includes: the network device in the above method design, or a chip disposed in the network device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions that, when executed by the processor, cause the communication device to perform the method performed by the network device in any of the possible aspects of the first aspect or the second aspect described above.
  • the application provides a computer program product comprising: computer program code, causing a computer to perform the method of the above aspects when the computer program code is run on a computer.
  • a computer readable medium storing program code for causing a computer to perform the method of the above aspects when the computer program code is run on a computer.
  • the present application provides a chip system including a processor for a terminal device to implement the functions involved in the above aspects, such as, for example, receiving or processing data and/or processing in the above method. information.
  • the chip system further comprises a memory for storing necessary program instructions and data of the terminal device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the present application provides a chip system including a processor for supporting a network device to implement the functions involved in the above aspects, such as, for example, transmitting or processing data and/or data involved in the above method. Or information.
  • the chip system further includes a memory for storing necessary program instructions and data of the network device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the network device adjusts the code rate of the transmission data by configuring an adjustment factor, and can flexibly implement low-rate data transmission for the feature that the dynamic range of the number of REs carrying data in the future communication system is extremely large. .
  • FIG. 1 is a schematic diagram of a communication system suitable for use in an embodiment of the present application.
  • FIG. 2 is a schematic interaction diagram of a method for transmitting data according to an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a terminal device 500 according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a network device 600 according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a network device 800 according to an embodiment of the present application.
  • downlink and uplink are based on OFDMA and SC-FDMA, respectively, and time-frequency resources are divided into OFDM or SC-FDMA symbols in the time dimension (hereinafter referred to as time domain symbols, abbreviated as symbols) and subcarriers in the frequency dimension.
  • time domain symbols hereinafter referred to as time domain symbols, abbreviated as symbols
  • subcarriers in the frequency dimension.
  • the smallest resource granularity is called a resource element (RE), which is a time-frequency grid representing a time domain symbol in the time domain and a subcarrier on the frequency domain.
  • RE resource element
  • the transmission of traffic in the LTE system is based on base station scheduling.
  • the basic time unit of scheduling is generally one subframe, and the duration is 1 ms.
  • One subframe includes two slots, and one slot includes seven time domain symbols.
  • a shorter time scheduling unit may be considered in the LTE evolution system, for example, a scheduling manner in units of one time slot or even several time domain symbols.
  • the specific scheduling process is that the base station sends a downlink control channel, where the downlink control channel carries scheduling information of the transport block TB in the downlink data channel or the uplink data channel.
  • the scheduling information includes resource allocation information (that is, occupied time-frequency resources) of the scheduled TB, and control information such as a modulation and coding scheme (MCS) index.
  • MCS modulation and coding scheme
  • the transport block size is an important step of uplink and downlink transmission.
  • the TBS information is carried in the MCS index and resource allocation information in the DCI.
  • U blindly checks the DCI and derives the TBS based on the resource allocation information and the MCS index. Then, according to the resource allocation information, the uplink data is transmitted or the downlink data is received.
  • the determination of the TBS depends only on the number of physical resource blocks PRB allocated by the MCS and the base station for the terminal (hereinafter, referred to as NPRB).
  • a subframe under frequency division duplex (FDD) and a normal subframe under time division duplex (TDD) are included.
  • the terminal device first obtains the TBS index through the MCS index, checks the MCS table (as shown in Table 1), and obtains the TBS according to the TBS index and the number of allocated PRBs determined from the resource allocation information, and checks the TBS table (as shown in Table 2) to obtain the TBS.
  • the downlink pilot time slot (referred to as DwPTS), the guard time (GP), and the uplink pilot time slot (referred to as UpPTS) are included.
  • LTE currently supports 10 different special subframe configurations.
  • the DwPTS length (that is, the number of time domain symbols) in different configurations is also different.
  • the DwPTS length can be equal to 8 to 12 symbols.
  • DwPTS may only be 3 symbols long, which is not used to transmit downlink data.
  • the terminal device For a special subframe, the terminal device first obtains the TBS index by using the MCS index lookup table 1 in the same manner as above. Then, based on the TBS index and the converted PRB (hereinafter referred to as equivalent PRB), the TBS is obtained by looking up Table 2. Among them, the equivalent PRB can be calculated by the following formula (1):
  • the LTE system considers that the time domain symbol of the DwPTS is less than the time domain symbol of the non-special subframe, so the parameter of 0.75 is configured to convert the number of allocated PRBs. Then calculate the TBS based on the converted PRB. However, regardless of whether DwPTS is 8 symbols long or 12 symbols, the configured parameters are 0.75, which is less flexible.
  • the 5G technology supports a more flexible time slot configuration. For example, a minislot mini-slot, a 7-symbol slot, a 14-symbol slot, and the like.
  • the flexible configuration of the reference signal (RS) is to be supported in the 5G technology, the number of REs actually used to carry data on each PRB is also configurable. Therefore, it can be understood that in 5G, the dynamic range of the number of REs used to carry data on each PRB is extremely large. For example, from 24 to 120. It is no longer appropriate to calculate the TBS in the manner of checking the table in the above LTE.
  • ⁇ is the number of spatial multiplexing layers of the TB mapping
  • Q is the modulation order of the modulation and coding strategy
  • R is the code rate
  • N PRB is the number of PRBs allocated in the frequency domain
  • Is the number of REs used to carry data in a PRB.
  • the network side configures one for each UE.
  • the network side configures one for each UE.
  • the network side configures one for the UE.
  • the present application proposes a method for transmitting data, which can satisfy the requirement that the number of REs carrying data in a 5G system is extremely large, the URLLC service may require a very low code rate, and has forward compatibility, etc., and is implemented in a multi-slot. In the case of a length, the UE can flexibly configure any low bit rate.
  • the technical solution of the present application can be applied to various communication systems, for example, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division multiple access (wideband) Code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) system, universal mobile telecommunication system (universal mobile telecommunication system, UMTS), LTE continuously evolved systems, 4.5G or next generation communication systems (eg, fifth-generation (5G) systems), and the like.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband Code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • LTE continuously evolved systems eg, 4.5G or next generation communication systems
  • 5G system can also be called a new generation wireless access technology (new radio, NR) system.
  • FIG. 1 is a schematic diagram of a wireless communication system suitable for use in an embodiment of the present application.
  • the wireless communication system includes at least a network device 101 and a terminal device 102.
  • the data communication between the network device 101 and the terminal device 102 can be performed through a wireless connection.
  • a wireless connection For example, 4.5G or 5G communication, etc.
  • FIG. 1 only takes a network device and a terminal device in the communication system as an example, but the embodiment of the present application is not limited thereto.
  • the communication system may also include more network devices or more terminal devices.
  • the network device 101 may be a base transceiver station (BTS) in GSM or code division multiple access CDMA, or a base station (nodeB, NB) in WCDMA, or an evolved base station in LTE (evolutional node).
  • the wireless controller in the scenario, and the network side devices in the future 5G system, such as a transmission point (TP), a transmission reception point (TRP), a base station (gNodeB, gNB), a small base station device, and the like.
  • the terminal device 102 may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, and wireless. Communication device, user agent or user device.
  • the terminal device may be a station (station, ST) in a wireless local area network (WLAN), and may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, or a wireless local loop (wireless local Loop, WLL) station, personal digital assistant (PDA) device, handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, and next-generation communication system, For example, a terminal device in a 5G network or a terminal device in a public land mobile network (PLMN) network that is evolving in the future.
  • PLMN public land mobile network
  • FIG. 2 is a schematic interaction diagram of a method for transmitting data according to an embodiment of the present application.
  • the network device sends downlink control information to the terminal device, where the terminal device receives downlink control information from the network device.
  • the downlink control information includes resource allocation information of the data channel, indication information of the modulation and coding scheme MCS, and indication information of the adjustment factor.
  • the indication information of the MCS is used to determine an MCS index from the set of candidate MCS indices.
  • the candidate MCS index set includes at least two candidate MCS indexes.
  • the indication information of the adjustment factor indicates an adjustment factor in the set of values of the adjustment factors of the high layer signaling configuration. Or, indicate the specific value of the adjustment factor.
  • the adjustment factor is used to determine the first TBS of the data channel.
  • the resource allocation information includes the number of PRBs in the frequency domain allocated by the network device for the terminal device, N PRB , and the number of REs for carrying data on one PRB in one time slot allocated by the network device, and one time slot in downlink transmission.
  • the number of REs used to carry data on one PRB is recorded as Recorded as an uplink transmission
  • the network device transmits information for calculating a transport block size TBS (referred to herein as a first TBS) of the data channel to the PDCCH on the PDCCH.
  • TBS transport block size
  • the UE receives the downlink control information carried on the PDCCH by performing blind detection on the PDCCH, and further obtains resource allocation information, indication information of the MCS, and indication information of the adjustment factor.
  • the network device Before sending the downlink control information to the terminal device, the network device first needs to determine the specific value of the adjustment factor and the adopted MCS index.
  • the network device may allocate downlink radio resources to each terminal device according to downlink channel state information and downlink buffer data transmitted by the network device upper layer; or allocate uplink to each terminal device according to the uplink channel state information and the buffer status report received from the terminal device.
  • Wireless resources The principles for allocating radio resources include, but are not limited to, the principle of maximum rate, the principle of proportional fairness, and the principle of polling.
  • the network device After determining the radio resource allocated to a terminal device, the network device according to the channel state information of the terminal device on the radio resource, and the reliability required for data transmission (for example, the LTE system requires data transmission to reach 90%).
  • the correct rate, URLLC requires a correct rate of 99.999%, to determine the MCS and/or adjustment factor used for the transmission.
  • the transmission Compared with the better channel state, if the channel state of the terminal device is poor, the transmission will adopt a lower order MCS and a smaller adjustment factor.
  • the transmission compared to the need to achieve lower reliability, if the terminal equipment needs to achieve higher reliability, the transmission will adopt a lower order MCS and a smaller adjustment factor.
  • the terminal device determines an adjustment factor from the set of values of the adjustment factors according to the indication information of the adjustment factor.
  • the terminal device determines an MCS index from the candidate MCS index set according to the indication information of the MCS.
  • At least two candidate MCS indexes are included in the candidate MCS index set.
  • the terminal device may determine, according to the indication information of the MCS, an MCS index that the network device indicates to receive or transmit the data channel.
  • the candidate MCS index set is predefined, and most candidate MCS indexes in the set, each corresponding to a fixed modulation order and code rate (for example, candidate MCS indexes 0-28 in the LTE system), other in the set
  • the candidate MCS index eg, candidate MCS indexes 29-31 in the LTE system
  • the modulation order and code rate need to be determined according to other predefined rules.
  • step 220 there is no order between step 220 and step 230.
  • the network device pre-configures, by the network device, an adjustment factor resource pool, where the adjustment factor resource pool includes all possible values of the adjustment factor.
  • the adjustment factor resource pool includes at least 1.
  • the adjustment factor resource pool includes at least one, in order to ensure that the rate rate required by the URLLC service is not lower than the lowest code rate in Table 3, the code rate can be determined by looking up Table 3.
  • the network device may configure, by using the high layer signaling, a set of adjustment factors for the terminal device, where the set of adjustment factors is a subset of the adjustment factor resource pool.
  • the network device can indicate the set of values of the adjustment factor by 2 bits.
  • the values of the adjustment factors are indicated by “00”, “01”, “10”, and “11”, respectively, to be 0.5, 0.6, 0.7, and 1.
  • the set of adjustment factors of the network device configuration may be related to the MCS.
  • a set of values of different adjustment factors can be configured for different MCS indexes.
  • Table 4 shows the correspondence between the MCS index and the set of adjustment factors. Where ⁇ represents an adjustment factor.
  • different values can be configured for the adjustment factor, which can save time-frequency resources.
  • the required code rate is 0.12.
  • the required code rate is 0.25.
  • the required code rate is 0.5.
  • MCS index 1 and index 3 can form the same MCS group, and MCS index 4 and index 1 and index 3 belong to different MCS groups.
  • the following example shows how different values of the configuration adjustment factor save transmission resources according to different MCS modes.
  • the error rate needs to be reduced to 10 ⁇ -5.
  • UE#2 saves downlink transmission resources of 2 PRBs.
  • the value set of the adjustment factor may be predefined or indicated by the network device by using high layer signaling.
  • the terminal device receiving the network device sends the first configuration information, where the first configuration information is used to indicate a set of values of the adjustment factors.
  • the terminal device determines the first TBS according to the resource allocation information, the MCS index, and the adjustment factor.
  • the terminal device determines that the first TBS includes two modes according to the resource allocation information, the MCS index, and the adjustment factor.
  • the terminal device calculates the first TBS according to the following formula (3) or (4).
  • the N PRB is the number of PRBs allocated by the network device to the terminal device, or The number of REs used to carry downlink and uplink data on one PRB in a time slot, ⁇ is the number of layers mapped by the data channel, Q m is a modulation order, R is a code rate, and ⁇ DL and ⁇ UL are respectively The adjustment factor used for downlink and uplink.
  • Q m can be determined according to the MCS MCS table search index.
  • formula (3) If it is a downlink transmission, formula (3) is used. If it is an uplink transmission, formula (4) is used.
  • the terminal device will directly calculate the first TBS according to the formula (3) or (4).
  • TBS in the formula (3) and the formula (4) is the first TBS.
  • the terminal device determines, according to the resource allocation information, the MCS, and the adjustment factor, the first TBS, including:
  • the terminal device will calculate the second TBS according to the above formula (3) or formula (4);
  • the terminal device selects the first TBS from the TBS set according to the second TBS.
  • the TBS set includes at least one TBS.
  • the second TBS calculated by the terminal device according to formula (3) or (4) is taken as an initial value, and the first TBS is selected from the TBS set according to the initial value.
  • the first TBS and the second TBS satisfy the first mapping relationship, and the first mapping relationship may be configured by the high layer signaling, which is not limited in this embodiment of the present application.
  • the first mapping relationship can be as described in any of the following:
  • the first TBS is the value closest to the second TBS in the TBS set
  • the first TBS is a maximum value of the TBS set that is not greater than the second TBS;
  • the first TBS is a minimum value of the TBS set that is not less than the second TBS.
  • the TBS set can be predefined or indicated by the network device through higher layer signaling.
  • the TBS determines that it may not require excessive flexibility. If the TBS of the network device is higher than the actual required TBS, it will reduce the reliability of the system coding and affect the system performance.
  • the base station transmits the URLLC service to the UE, and the small data packet to be transmitted transmitted from the upper layer by the URLLC service has only 256 bits (that is, 32 bytes).
  • the base station decides to schedule L PRBs, it is transmitted by the MCS index N, and the TBS in the TBS set having a mapping relationship with the TBS is (256+Z) bits.
  • the base station must first fill in the zero-padding mode, and the 256-bit data packet is supplemented with (256+Z) bits, and then at the code rate. send data.
  • the network equipment is only configured with 256 bits of TBS, then the base station will directly use the code rate. send data.
  • the demodulation performance is rather high.
  • the terminal device performs data channel reception or transmission with the network device according to the first TBS.
  • the terminal device receives the data channel according to the first TBS determined in step 240.
  • the terminal device performs transmission of the uplink data channel according to the first TBS determined in step 240.
  • the network device adjusts the code rate of the transmission data by configuring an adjustment factor, and can flexibly implement low-rate data transmission for the feature that the dynamic range of the number of REs carrying data in the future communication system is extremely large. .
  • the method for data transmission provided by the present application is described in detail above with reference to FIGS. 1 and 2.
  • the terminal device and the network device in the embodiments of the present application are described below with reference to FIG. 3 to FIG.
  • FIG. 3 is a schematic block diagram of a terminal device 500 according to an embodiment of the present application. As shown in FIG. 3, the terminal device 500 includes:
  • the communication unit 510 is configured to receive downlink control information from the network device, where the downlink control information includes resource allocation information of the data channel, indication information of the modulation and coding scheme MCS, and indication information of the adjustment factor, and the indication information of the adjustment factor indicates the high layer signaling configuration.
  • An adjustment factor in the set of adjustment factors of the adjustment factor, the adjustment factor is used to determine the first transport block size TBS of the data channel;
  • the processing unit 520 is configured to determine, according to the indication information of the MCS, an MCS index from the set of candidate MCS indexes, where the MCS index set includes at least two candidate MCS indexes; and according to the indication information of the adjustment factor, from the value set of the adjustment factor Determining an adjustment factor; determining a first TBS according to resource allocation information, an MCS index, and an adjustment factor;
  • the communication unit 510 is configured to perform reception or transmission of a data channel according to the first TBS.
  • the communication unit 510 When the communication unit 510 is used for data channel transmission, it may specifically be a transmitting unit. When used for data channel reception, it can be a receiving unit.
  • Each unit in the terminal device 500 of the embodiment of the present application and the other operations or functions described above are respectively corresponding processes executed by the terminal device in the method for transmitting data. For the sake of brevity, it will not be repeated here.
  • FIG. 4 is a schematic block diagram of a network device 600 according to an embodiment of the present application.
  • the network device 600 includes a processing unit 610 and a communication unit 620.
  • the processing unit 610 is configured to control the communication unit 620 to perform the following steps:
  • the indication information of the MCS is used to determine the MCS index from the candidate MCS index set, and adjust
  • the indication information of the factor indicates an adjustment factor in the set of values of the adjustment factor of the high-level configuration, and the adjustment factor is used to determine the first transport block size TBS of the data channel;
  • FIG. 5 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application.
  • the terminal device 700 includes one or more processors 701, one or more memories 702, and one or more transceivers 703.
  • the processor 701 is configured to control the transceiver 703 to send and receive signals
  • the memory 702 is configured to store a computer program
  • the processor 701 is configured to call and run the computer program from the memory 702, so that the terminal device performs a method for transmitting data.
  • Corresponding processes and/or operations performed by the terminal device For the sake of brevity, it will not be repeated here.
  • terminal device 500 shown in FIG. 3 can be implemented by the terminal device 700 shown in FIG. 5.
  • communication unit 510 can be implemented by transceiver 703 in FIG.
  • Processing unit 520 can be implemented by processor 701, and the like.
  • FIG. 6 is a schematic structural diagram of a network device 800 according to an embodiment of the present application.
  • network device 800 includes one or more processors 801, one or more memories 802, and one or more transceivers 803.
  • the processor 801 is configured to control the transceiver 803 to send and receive signals
  • the memory 802 is configured to store a computer program
  • the processor 801 is configured to call and run the computer program from the memory 802, so that the network device performs a method for transmitting data.
  • the corresponding processes and/or operations performed by the network device For the sake of brevity, it will not be repeated here.
  • terminal device 600 shown in FIG. 4 can be implemented by the terminal device 800 shown in FIG. 6.
  • communication unit 620 in FIG. 4 can be implemented by transceiver 703 in FIG.
  • the present application also provides a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the operations performed by the terminal device in the above method embodiment and / or process.
  • the application also provides a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the operations performed by the network device in the above method embodiments and/or Process.
  • the application further provides a computer readable medium storing program code, when the computer program code is run on a computer, causing the computer to perform the operations performed by the terminal device in the above method embodiment and/ Or process.
  • the application further provides a computer readable medium storing program code, when the computer program code is run on a computer, causing the computer to perform operations performed by the network device in the above method embodiment and/ Or process.
  • the present application provides a chip system including a processor for implementing the functions involved in the above method embodiments, for example, receiving or processing data and/or information involved in the above method.
  • the chip system further comprises a memory for storing necessary program instructions and data of the terminal device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the present application provides a chip system including a processor for implementing the functions involved in the above method embodiments, for example, receiving or processing data and/or information involved in the above method.
  • the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the program of the present application.
  • the processor can include a digital signal processor device, a microprocessor device, an analog to digital converter, a digital to analog converter, and the like.
  • the processor can distribute the control and signal processing functions of the mobile device among the devices according to their respective functions.
  • the processor can include functionality to operate one or more software programs, which can be stored in memory.
  • the functions of the processor may be implemented by hardware or by software executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the memory may be a read-only o-ory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • Dynamic storage device It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage (including a compact disc, a laser disc, a compact disc, a digital versatile disc, a Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other device that can be used to carry or store desired program code in the form of an instruction or data structure and accessible by a computer. Medium, but not limited to this.
  • the foregoing memory and the memory may be physically independent units, or the memory may be integrated with the processor.
  • 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.

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

Abstract

La présente invention concerne un procédé de transmission de données permettant d'obtenir une transmission de données à faible débit binaire. Le procédé comprend les étapes suivantes : un dispositif terminal reçoit des informations de commande de liaison descendante d'un dispositif de réseau, les informations de commande de liaison descendante comprenant des informations d'attribution de ressources d'un canal de données, des informations d'instruction d'un schéma de modulation et de codage (MCS), et des informations d'instruction d'un facteur d'ajustement, les informations d'instruction du facteur d'ajustement donnant l'instruction à un facteur d'ajustement d'un ensemble de valeurs de facteur d'ajustement d'être configurées par une signalisation de couche élevée, et le facteur d'ajustement étant configuré pour déterminer une première taille de bloc de transport (TBS) du canal de données; le dispositif terminal détermine, en fonction des informations d'instruction du facteur d'ajustement, le facteur d'ajustement à partir de l'ensemble de valeurs de facteur d'ajustement, et à déterminer, selon les informations d'instruction du MCS, un indice MCS à partir d'un ensemble d'indices MCS candidats, l'ensemble d'indices de MCS comprenant au moins deux indices de MCS candidats; le dispositif terminal déterminant la première TBS conformément aux informations d'attribution de ressources, l'indice MCS et le facteur d'ajustement; et le dispositif terminal effectue, selon la première TBS, la réception ou la transmission du canal de données.
PCT/CN2018/098929 2017-08-11 2018-08-06 Procédé, dispositif terminal et dispositif de réseau de transmission de données Ceased WO2019029473A1 (fr)

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CN113630875A (zh) * 2020-05-08 2021-11-09 展讯通信（上海）有限公司 数据处理方法及装置
CN115514451A (zh) * 2021-06-22 2022-12-23 华为技术有限公司 数据传输的方法和装置
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