WO2014146280A1 - 数据传输方法、基站及用户设备 - Google Patents
数据传输方法、基站及用户设备 Download PDFInfo
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- WO2014146280A1 WO2014146280A1 PCT/CN2013/073005 CN2013073005W WO2014146280A1 WO 2014146280 A1 WO2014146280 A1 WO 2014146280A1 CN 2013073005 W CN2013073005 W CN 2013073005W WO 2014146280 A1 WO2014146280 A1 WO 2014146280A1
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- physical resource
- resource block
- modulation level
- tbs
- coding
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 230000011664 signaling Effects 0.000 claims description 31
- 230000007774 longterm Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
Definitions
- Embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method, a base station, and a user equipment. Background technique
- the base station In the 8th version of the Long Term Evolution System (English full name: Long Term Evolution Release.8 REL.8, LTE REL.8 for short) to the LTE REL.11 system, the base station to the user equipment (English name: User Equipment, referred to as UE)
- the channel state determines the throughput of the base station to the UE.
- the base station In a better channel state, the base station can transmit data to the UE using a higher code modulation (English name: Modulation and Coding Scheme, MCS for short), the throughput of the system.
- MCS Modulation and Coding Scheme
- the base station can transmit data to the UE with a relatively low MCS level, and the base station determines according to the channel state fed back by the UE.
- the base station needs to determine the size of the transport block that needs to be occupied by the delivered service data, and determine that the transport block is large.
- the base station usually in the transport block size table according to the determined MCS level and the frequency resource scheduled by the system (English full name:
- the transport block size table (abbreviated as TBS table) determines the transport block size used to carry the service data sent by the base station to the UE.
- the base station transmits data to the UE using the transport block determined by the existing TBS table.
- the system overhead of the LTE REL.12 system is smaller than that of the LTE REL.8-LTE REL. il system, and thus the actual effective coding rate in the transmission process is reduced, thereby affecting the LTE REL.12 system. Throughput. Summary of the invention
- an embodiment of the present invention provides a data transmission method, including: determining, by a base station, a coding modulation level;
- the base station selects, in the transport block size table, a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair,
- the number of the second physical resource block pair is a product of the number of the first physical resource block pair and a set conversion factor;
- the base station sends the service data to the user equipment by using the selected TBS;
- the base station sends a system scheduling control signal to the user equipment, where the system scheduling control signal includes the coded modulation level and the time-frequency resource.
- the base station selects, in a transport block size table, a correspondence with the coded modulation level, and corresponds to the number of the first physical resource block pair
- the transport block size TBS or the TBS corresponding to the number of the second physical resource block pair includes:
- a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair according to a system configuration parameter or a system overhead size, or selecting, corresponding to the coded modulation level, and the second The number of physical resource block pairs corresponds to the TBS.
- the method further includes:
- the base station sends a high layer signaling message to the user equipment, where the high layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or The indication information of the TBS corresponding to the coding modulation level and corresponding to the number of the second physical resource block pair.
- the method further includes:
- the transport block size table includes: a data transport block size table in a LTE REL.8 version of the Long Term Evolution System.
- the setting conversion factor includes a first setting conversion factor and a second encoding corresponding to a first coding modulation level in the transport block size table. a second set conversion factor corresponding to the modulation level, and the first set conversion factor is different from the second set conversion factor.
- the first coding modulation level is a maximum coding modulation level in the transport block size table
- the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first setting conversion factor is 1.1;
- the second set conversion factor is 1.3.
- the number of the second physical resource block pair is greater than the maximum physical resource block pair of the transport block size table, and the coded modulation level corresponds to The TBS corresponding to the number of second physical resource block pairs is a TBS corresponding to the coded modulation level and corresponding to the number of the largest physical resource block pair.
- an embodiment of the present invention provides a data transmission method, including:
- the user equipment receives a system scheduling control signal sent by the base station, where the system scheduling control signal includes a coding modulation level and a time-frequency resource;
- the user equipment selects, in a transport block size table, a transport block size TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair or a second physical resource a number of the source block pair corresponding to the TBS, where the number of the second physical resource block pair is a product of the number of the first physical resource block pair and a set conversion factor;
- the user equipment receives the service data sent by the base station by using the selected TBS.
- the user equipment in the transport block size table, selects a number corresponding to the coded modulation level, and the number of the first physical resource block pair
- the corresponding transport block size TBS or the TBS corresponding to the number of the second physical resource block pair includes:
- the user equipment selects a TBS corresponding to the coded modulation level and corresponds to the number of the first physical resource block pair according to a system configuration parameter or a system overhead size, or selects a code corresponding to the coded modulation level and The number of two physical resource block pairs corresponds to the TBS.
- the method further includes:
- the high layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or Indication information of the TBS corresponding to the coded modulation level and corresponding to the number of second physical resource block pairs.
- the method further includes:
- the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or The indication information of the TBS corresponding to the coding modulation level and corresponding to the number of the second physical resource block pair is described.
- the transport block size table includes: a data transport block size table in a LTE REL.8 version of the Long Term Evolution System.
- the setting conversion factor includes a first setting corresponding to a first coding modulation level in the transport block size table. And a second set conversion factor corresponding to the second coded modulation level, and the first set conversion factor is different from the second set conversion factor.
- the first coding modulation level is a maximum coding modulation level in the transport block size table
- the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first setting conversion factor is 1.1;
- the second set conversion factor is 1.3.
- the number of the second physical resource block pair is greater than the number of the largest physical resource block pair of the transport block size table, and the code corresponding to the coded modulation level and
- the TBS corresponding to the number of second physical resource block pairs is a TBS corresponding to the coded modulation level and corresponding to the number of the largest physical resource block pair.
- an embodiment of the present invention provides a base station, including:
- a processor configured to determine a coding modulation level, determine a time-frequency resource, and determine a number of the first physical resource block pair according to the time-frequency resource; and select, in the transport block size table, the coding modulation level, and a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, where the number of the second physical resource block pair is the first physical resource block pair The product of the number and the set conversion factor;
- a transmitter configured to send the service data to the user equipment by using the selected TBS; and send a system scheduling control signal to the user equipment, where the system scheduling control signal includes the code modulation level and the time-frequency resource.
- the processor is further configured to: select, according to a system configuration parameter or a system overhead, a level corresponding to the coded modulation level and the first physics A TBS corresponding to the number of resource block pairs, or a TBS corresponding to the coded modulation level and corresponding to the number of second physical resource block pairs.
- the transmitter is further configured to send a high layer signaling message to the user equipment, where
- the high-layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a pair corresponding to the coded modulation level and is associated with the second physical resource block pair.
- the number of indication information corresponding to the TBS is further configured to send a high layer signaling message to the user equipment, where
- the high-layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a pair corresponding to the coded modulation level and is associated with the second physical resource block pair.
- the transmitter is further configured to send a downlink control message to the user equipment, where
- the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a corresponding to the coded modulation level and corresponds to the number of the second physical resource block pair. Instructions for the TBS.
- the transport block size table includes: a data transport block size table in a LTE REL.8 version of the Long Term Evolution System.
- the setting conversion factor includes a first setting conversion factor and a second encoding corresponding to a first coding modulation level in the transport block size table. a second set conversion factor corresponding to the modulation level, and the first set conversion factor is different from the second set conversion factor.
- the first coding modulation level is a maximum coding modulation level in the transport block size table
- the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first setting conversion factor is 1.1;
- the second set conversion factor is 1.3.
- the processor is further used to When the number of the second physical resource block pair is greater than the maximum physical resource block pair of the transport block size table, determining a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair is A TBS corresponding to a coded modulation level and corresponding to the number of the largest pair of physical resource blocks.
- an embodiment of the present invention provides a user equipment, including:
- a receiver configured to receive a system scheduling control signal sent by the base station, where the system scheduling control signal includes a coding modulation level and a time-frequency resource;
- a processor configured to select, in a transport block size table, a transport block size TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair or a number corresponding to the second physical resource block pair
- the TBS where the number of the second physical resource block pair is a product of the number of the first physical resource block pair and a set conversion factor; and the selected TBS receives the service data sent by the base station.
- the processor is further configured to: select, according to a system configuration parameter or a system overhead, a level corresponding to the coded modulation level and the first physics A TBS corresponding to the number of resource block pairs, or a TBS corresponding to the coded modulation level and corresponding to the number of second physical resource block pairs.
- the receiver is further configured to receive a high layer signaling message sent by the base station, where
- the high-layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a pair corresponding to the coded modulation level and is associated with the second physical resource block pair.
- the number of indication information corresponding to the TBS is further configured to receive a high layer signaling message sent by the base station, where
- the high-layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a pair corresponding to the coded modulation level and is associated with the second physical resource block pair.
- the receiver is further configured to receive a downlink control message that is sent by the base station,
- the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a corresponding to the coded modulation level and corresponds to the number of the second physical resource block pair. Instructions for the TBS.
- the transport block size table includes: a layer data transport block size table in the Long Term Evolution System Release 8 LTE REL.8.
- the setting conversion factor includes a first setting conversion factor and a second encoding corresponding to a first coding modulation level in the transport block size table. a second set conversion factor corresponding to the modulation level, and the first set conversion factor is different from the second set conversion factor.
- the first coding modulation level is a maximum coding modulation level in the transport block size table
- the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first setting conversion factor is 1.1;
- the second set conversion factor is 1.3.
- the processor is further configured to determine, when the number of the second physical resource block pair is greater than the maximum physical resource block pair of the transport block size table,
- the TBS corresponding to the modulation level and corresponding to the number of the second physical resource block pair is a TBS corresponding to the coded modulation level and corresponding to the number of the largest physical resource block pair.
- the data transmission method, the base station, and the user equipment in this embodiment determine the coding modulation level and the time-frequency resource by using the base station, and determine the number of the first physical resource block pair according to the time-frequency resource; and select the coding modulation level in the transport block size table.
- the scheduling control signal includes a coding modulation level and a time-frequency resource in the system scheduling control signal, so that the base station selects the TBS, so that the base station can transmit the service data to the UE according to the selected TBS, can achieve the expected coding rate, and improve the system throughput.
- Embodiment 1 is a flowchart of a method according to Embodiment 1 of a data transmission method according to the present invention
- FIG. 2 is a flowchart of a method according to Embodiment 2 of a data transmission method according to the present invention
- Embodiment 1 of a base station according to the present invention is a schematic structural diagram of Embodiment 1 of a base station according to the present invention.
- FIG. 4 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention.
- the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention, and the embodiments described are the present invention. Some embodiments, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
- the data transmission method in this embodiment includes:
- the base station determines a coding modulation level.
- the base station needs to determine the code modulation level (English name: Modulation and Coding Scheme Level, MCS Level) when transmitting the service data to the user equipment (English name: User Equipment, UE for short), so that the base station treats according to the determined MCS Level.
- the transmitted service data is encoded.
- the base station may determine the MCS Level by using the channel status reported by the UE. When the communication channel status of the base station and the UE is good, the base station may determine that the higher-level MCS Level is used as the coded modulation level to encode the service data to be transmitted; When the communication channel state with the UE is poor, the base station may determine that the lower level MCS Level is encoded as the coded modulation level to be transmitted.
- the base station determines a time-frequency resource, and determines a number of the first physical resource block pair according to the time-frequency resource.
- the system may allocate time-frequency resources for the data transmission according to the current time-frequency resource availability status, and the base station determines, according to the determined time-frequency resource, the physical resource block pair that the base station transmits the service data to the UE (English name: Physical Resource Block Pair, referred to as: PRB Pair).
- PRB Pair The number, for example: The number of PRB Pairs determined by the base station is 11, then the base station will carry the service data on the 11 PRB Pairs.
- the base station selects, in a transport block size table, a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, where the second The number of physical resource block pairs is the product of the number of first physical resource block pairs and the set scaling factor.
- the base station may first determine, according to the determined MCS Level, a modulation order index value and a TBS index value corresponding to the MCS Level in a transport block size index table (English name: Modulation and TBS index table for PDSCH); A transport block size corresponding to the MCS level and corresponding to the number of the first physical resource block pair determined in the foregoing 102 is selected in the transport block size table (English full name: Transport block size, TBS for short), and the coding rate corresponding to the TBS Can match the MCS Level determined by the base station.
- a transport block size index table English name: Modulation and TBS index table for PDSCH
- the base station may first in the transport block size index table according to the determined MCS Level
- the modulation order index value corresponding to the MCS level and the TBS index value are determined; secondly, the MCS level corresponding to the MCS level and the second physical resource are selected in the transport block size table.
- the number of block pairs corresponds to the TBS.
- the coding rate corresponding to the TBS can match the MCS Level determined by the base station.
- the number of the first physical resource block pair is the number of physical resource block pairs determined by the base station according to the system scheduling
- the number of the second physical resource block pair is the product of the number of the first physical resource block pair and the set conversion factor.
- the base station sends the service data to the user equipment by using the selected TBS.
- the base station modulates the service data to the TBS determined in the foregoing 103 to send the modulated service data to the UE.
- the base station sends a system scheduling control signal to the user equipment, where the system scheduling control signal includes a coding modulation level and a time-frequency resource.
- the base station sends a system scheduling control signal that includes the MCS level and the time-frequency resource determined by the base station to the UE, so that the UE can correctly receive the service data sent by the base station according to the MCS level and the time-frequency resource, the time-frequency resource.
- the time-frequency resource included in the system scheduling control signal is the number of the first physical resource block pair .
- the coding modulation level and the time-frequency resource are determined by the base station, and the number of the first physical resource block pair is determined according to the time-frequency resource; and the coding-modulation level is selected in the transport block size table, and the The transport block size corresponding to the number of physical resource block pairs
- the device sends the service data to the user equipment, and the system scheduling control signal is sent to the user equipment, where the system scheduling control signal includes the coding modulation level and the time-frequency resource, so that the base station selects the TBS, so that the base station can transmit the service data to the UE according to the selected TBS.
- the expected encoding rate increases the throughput of the system.
- the base station selects, in the transport block size table, a transport block size TBS corresponding to the number of the first physical resource block pair or a second physical resource block pair corresponding to the coded modulation level.
- the TBS corresponding to the number may include: the base station selecting, according to the system configuration parameter or the system overhead, a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selecting the code modulation level corresponding to the first
- the number of two physical resource block pairs corresponds to TB S .
- the base station may select a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair according to the system configuration parameter, or select a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the base station selects a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair;
- the base station selects a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the station may select a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair according to the system overhead size, or select a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the base station selects a TBS corresponding to the coded modulation level and corresponds to the number of the first physical resource block pair; when the system overhead is 12 resource units, the base station selects and codes the modulation level. Corresponding to and corresponding to the number of second physical resource block pairs.
- the data transmission method in this embodiment may further include: the base station sends a high layer signaling message to the user equipment, where the high layer signaling message carries the selection corresponding to the coding modulation level and is related to the first physical resource.
- the TBS corresponding to the number of block pairs, or the indication information of the TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair is selected.
- the high-layer signaling message sent by the base station to the UE may carry the TBS that indicates that the UE selects the number corresponding to the coded modulation level and corresponds to the number of the first physical resource block pair, or selects the second corresponding to the coded modulation level and the second
- the number of physical resource block pairs corresponds to the indication information of the TBS, to inform the UE through the high layer signaling how to determine the TBS when receiving the service data.
- the data transmission method in this embodiment may further include: the base station sending a downlink control message to the user equipment, where the downlink control message carries the selection corresponding to the coding modulation level and the first The number of physical resource block pairs corresponds to the TBS, or the indication information of the TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair is selected, so that the switching speed of the base station between different selections can be improved.
- the transport block size table may include: a layer data transmission block size table in the Long Term Evolution System Version 8 LTE REL.8.
- the data transmission block size table in the LTE REL. 8 may be as shown in Table 1.
- N PRB in the first transport block size table indicates the number of physical resource block pairs
- I TBS indicates the TBS index value
- elements in the table indicate the transport block size TBS.
- the setting conversion factor may include a first setting conversion factor corresponding to the first coding conversion factor in the transport block size table and a second setting conversion factor corresponding to the second coding modulation level, and the first setting conversion The factor is different from the second set conversion factor.
- the scaling factor may include, for example, a scaling factor corresponding to the first type of coding modulation level in the transport block size table, and another scaling factor corresponding to the second type of coding modulation level, that is, if the base station determines the MCS Level as The first type of coding modulation level, then the second physical resource block pair number is the number of the first physical resource block pair multiplied by the conversion factor corresponding to the first type of coding modulation level; if the base station determines the MCS Level as the second type of coding modulation level Then, the second physical resource block pair number is the number of the first physical resource block pair multiplied by the scaling factor corresponding to the second type of coding modulation level.
- multiple scaling factors may be associated with multiple MCS levels, and the method for determining the MCS Level category may also be different according to system overhead.
- the first coded modulation level may be a maximum coded modulation level in the transport block size table; and the second coded modulation level may be a non-maximum coded modulation level in the transport block size table.
- the first coded modulation level may be a maximum coded modulation level in a transport block size table; the second coded modulation level may be a non-maximum coded modulation level in a transport block size table, in other embodiments, the first A coded modulation level may also be the maximum coded modulation level in the transport block size table and any other one or more coding levels.
- the first set conversion factor may be 1.1; and the second set conversion factor may be 1.3.
- the base station determines that the MCS level is 8, the first physical resource block pair number is 11, and the system overhead is 12 resource units. Then, the base station selects a code modulation level corresponding to the second physical resource in the transport block size table. The number of the pair of blocks corresponds to the TBS, the number of the second pair of physical resource blocks is the product of the number 11 of the first physical resource block pair and the set conversion factor, and since the MCS Level 8 is the non-maximum coded modulation level, the setting is converted.
- the factor is 1.3, and the number of the second physical resource block pair is 11 times 1.3 equals 14.3.
- the base station may round the second physical resource block pair number 14.3, and the rounding process may round up or down. Rounding up, in the transport block size table, determine a TBS corresponding to the MCS Level of 8 and corresponding to the number of physical resource block pairs, and modulate the service data to the determined TBS for transmission to the UE, and inform the UE of the MCS Level.
- the number of physical resource block pairs determined by the base station is 11, so that the UE receives the service data according to the MCS Level and the number of physical resource block pairs.
- the TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair corresponds to the coded modulation level. And a TBS corresponding to the number of largest physical resource block pairs.
- the number corresponding to the TBS is a TBS corresponding to the coded modulation level and corresponding to the number of largest physical resource block pairs.
- the data transmission method of the embodiment includes:
- the user equipment receives a system scheduling control signal sent by the base station, where the system scheduling control signal includes a coding modulation level and a time-frequency resource.
- the user equipment selects, in the transport block size table, a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, where The number of two physical resource block pairs is the product of the number of first physical resource block pairs and the set scaling factor.
- the user equipment (English name: User Equipment, UE for short) may first determine the modulation order index value corresponding to the MCS Level according to the determined MCS Level in the Modulation and TBS index table for PDSCH. And TBS Index value; Secondly, the transport block size corresponding to the MCS Level and corresponding to the number of the first physical resource block pair determined in 202 above is selected in the transport block size table (English full name: Transport block size, abbreviated as TBS).
- TBS Transport block size
- the UE may first determine a modulation order index value and a TBS index value corresponding to the MCS Level in a transport block size index table (English name: Modulation and TBS index table for PDSCH) according to the determined MCS Level; A TBS corresponding to the MCS Level and corresponding to the number of second physical resource block pairs is selected in the block size table.
- a transport block size index table English name: Modulation and TBS index table for PDSCH
- the number of the first physical resource block pair is the number of physical resource block pairs determined by the UE according to the time-frequency resource included in the received system scheduling control signal, and the number of the second physical resource block pair is the number of the first physical resource block pair.
- the product of the set conversion factor is the product of the set conversion factor.
- the user equipment receives the service data sent by the base station by using the selected TBS.
- the system scheduling control signal sent by the base station is received by the user equipment, where the system scheduling control signal includes a coding modulation level and a time-frequency resource; and the transmission block size table is selected to correspond to the coding modulation level, and the a transport block size TBS corresponding to the number of physical resource block pairs or a TBS corresponding to the number of second physical resource block pairs, where the number of the second physical resource block pair is the number of the first physical resource block pair and the setting conversion The product of the factors.
- the user equipment uses the selected TBS to receive the service data sent by the base station, so that the user equipment selects the TBS, so that the user equipment can receive the expected data rate according to the selected TBS receiving the service data transmitted by the base station, and improve the system throughput. .
- the user equipment selects, in the transport block size table, a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, including: The user equipment selects a TBS corresponding to the coded modulation level and corresponds to the number of the first physical resource block pair according to the system configuration parameter or the system overhead size, or selects a code corresponding to the coded modulation level and corresponds to the number of the second physical resource block pair. TBS.
- the UE may select a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair according to the system configuration parameter, or select a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the system configuration parameter indicates that the control signaling includes a physical downlink control channel, indicating that the system instructs the UE to select a number corresponding to the coded modulation level and the number of the first physical resource block pair
- the system configuration parameter indicates that the physical downlink control channel is not included in the control signaling
- the system indicates that the UE instructs the UE to select a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the UE may select a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair according to the system overhead size, or select a TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair.
- the system overhead size is 48 resource units, indicating that the system instructs the UE to select a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair; when the system overhead is 12 resource units, indicating that the system indicates The UE selects a TB S corresponding to the coded modulation level and corresponding to the number of second physical resource block pairs.
- the user equipment receives the high layer signaling message sent by the base station, and the high layer signaling message carries the TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects and corresponds to the coded modulation level and The number of the second physical resource block pair corresponds to the indication information of the TBS.
- the high-layer signaling message sent by the base station to which the UE receives may carry the TBS that indicates that the UE selects the number corresponding to the coded modulation level and corresponds to the number of the first physical resource block pair, or selects and corresponds to the coded modulation level and The number of the second physical resource block pair corresponds to the indication information of the TBS.
- the user equipment receives the downlink control message sent by the base station, where the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or
- the indication information of the TBS corresponding to the modulation level and corresponding to the number of the second physical resource block pair may improve the switching speed of the UE between different selections.
- the transport block size table includes: a layer data transport block size table in the LTE REL.8 of the LTE REL.8, and a data transport block size table in the LTE REL.8 is as shown in Table 1 above. Please refer to Table 1, which will not be repeated here.
- the setting conversion factor includes a first setting conversion factor corresponding to the first coding modulation level in the transport block size table and a second setting conversion factor corresponding to the second coding modulation level, and the first setting conversion factor Different from the second setting conversion factor.
- the scaling factor may include, for example: a first type of encoding in the transport block size table
- the modulation level corresponds to a conversion factor
- the second type of coding modulation level corresponds to another conversion factor, that is, if the MCS Level included in the system scheduling control signal received by the UE is the first type of coding modulation level, then the second physical resource
- the number of block pairs is a number of the first physical resource block pair multiplied by a scaling factor corresponding to the first type of coding modulation level; if the MCS Level included in the system scheduling control signal received by the UE is the second type of coding modulation level, then the second physics
- the number of resource block pairs is the number of first physical resource block pairs multiplied by a scaling factor corresponding to the second type of coding modulation level.
- multiple scaling factors may be associated with multiple MCS levels, and the method for determining the MCS Level category may also be different according to system overhead.
- the first coded modulation level is a maximum coded modulation level in the transport block size table; and the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first coded modulation level may be a maximum coded modulation level in a transport block size table; the second coded modulation level may be a non-maximum coded modulation level in a transport block size table, in other embodiments, the first A coded modulation level may also be the maximum coded modulation level in the transport block size table and any other one or more coding levels.
- the first set conversion factor is 1.1; the second set conversion factor is 1.3.
- the UE determines that the MCS Level is 8 according to the system scheduling control signal sent by the base station, the number of the first physical resource block pair is 11 PRB Pairs, and the system overhead is 12 resource units. Then, the UE selects and encodes in the transport block size table. a modulation level corresponding to the TBS corresponding to the number of the second physical resource block pair, the number of the second physical resource block pair being the product of the number 11 of the first physical resource block pair and the set conversion factor, and because the MCS Level 8 is The non-maximum coded modulation level, the set conversion factor is 1.3, and the number of the second physical resource block pair is 11 times 1.3 equals 14.3. At this time, the UE may round the second physical resource block pair number 14.3.
- the rounding process may be rounded up or down and rounded up and the same as the rounding mode of the base station. That is, if the base station is rounded up, the UE is also rounded up. If the base station is rounded down, the UE is also rounded down.
- the TBS corresponding to the MCS Level 8 and corresponding to the number of physical resource block pairs is 14, and the UE receives the received service data sent by the base station according to the TBS.
- the TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair corresponds to the coded modulation level. And corresponding to the number of the largest physical resource block pair TBS.
- the number corresponding to the TBS is a TBS corresponding to the coded modulation level and corresponding to the number of largest physical resource block pairs.
- the base station 300 of this embodiment includes: a processor 31 and a transmitter 32, where the processor 31 can be used to determine a coding modulation level; a frequency resource, and determining a number of the first physical resource block pair according to the time-frequency resource; selecting, in the transport block size table, a transport block size TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair a number of two physical resource block pairs corresponding to the TBS, where the number of the second physical resource block pair is a product of the number of the first physical resource block pair and the set conversion factor; the transmitter 32 may be configured to use the selected TBS Transmitting service data to the user equipment; transmitting a system scheduling control signal to the user equipment, where the system scheduling control signal includes a coding modulation level and a time-frequency resource.
- the base station in this embodiment determines the coded modulation level by the processor 31; determines the time-frequency resource, and determines the number of the first physical resource block pair according to the time-frequency resource; and selects the code modulation level in the transport block size table, and a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, where the number of the second physical resource block pair is the number and setting of the first physical resource block pair
- the processor 31 is further configured to select, according to the system configuration parameter or the system overhead size, a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, Or selecting, corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair
- the sender 32 may be further configured to send a high-level signaling message to the user equipment, where the high-layer signaling message carries a TBS that corresponds to the coded modulation level and corresponds to the number of the first physical resource block pair, or selects and encodes.
- the transmitter 32 may be further configured to send a downlink control message to the user equipment, where the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a coded modulation level.
- the transport block size table may include: a layer data transmission block size table in the Long Term Evolution System Version 8 LTE REL.8.
- the setting conversion factor may include a first setting conversion factor corresponding to the first coding conversion factor in the transport block size table and a second setting conversion factor corresponding to the second coding modulation level, and the first setting conversion The factor is different from the second set conversion factor.
- the first coded modulation level is a maximum coded modulation level in the transport block size table; the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first set conversion factor is 1.1; the second set conversion factor is 1.3.
- the processor 31 is further configured to determine, when the number of the second physical resource block pair is greater than the maximum physical resource block pair of the transport block size table, the number corresponding to the coded modulation level and the number of the second physical resource block pair
- the corresponding TBS is a TBS corresponding to the coded modulation level and corresponding to the number of largest physical resource block pairs.
- the user equipment 400 of this embodiment includes: a receiver 41 and a processor 42, where the receiver 41 can be used to receive a system sent by a base station.
- the system scheduling control signal includes a coding modulation level and a time-frequency resource;
- the processor 42 may be configured to select, in the transport block size table, a transmission corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair a block size TBS or a TBS corresponding to the number of the second physical resource block pair, wherein the number of the second physical resource block pair is a product of the number of the first physical resource block pair and the set conversion factor; and the selected TBS is used.
- the user equipment of this embodiment receives, by the receiver, a system scheduling control signal sent by the base station, where the system scheduling control signal includes a coding modulation level and a time-frequency resource; the processor selects a coding modulation level corresponding to the coding block size table, and a transport block size TBS corresponding to the number of the first physical resource block pair or a TBS corresponding to the number of the second physical resource block pair, where the number of the second physical resource block pair is the number and setting of the first physical resource block pair
- the product of the conversion factor is used to receive the service data sent by the base station by using the selected TBS, so that the user equipment selects the TBS, so that the user equipment can receive the expected data rate according to the selected TBS receiving the service data transmitted by the base station, and improve the system. Throughput.
- the processor 42 may be further configured to select, according to the system configuration parameter or the system overhead size, a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or select the code modulation level corresponding to the first The number of two physical resource block pairs corresponds to the TBS.
- the receiver 41 is further configured to receive a high-level signaling message sent by the base station, where the high-layer signaling message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or is selected and encoded.
- the receiver 41 may be further configured to receive a downlink control message sent by the base station, where the downlink control message carries a TBS corresponding to the coded modulation level and corresponding to the number of the first physical resource block pair, or selects a coding modulation level.
- the transport block size table may include: a data transport block size table in the LTE REL.8 version of the Long Term Evolution System, and a data transport block size table in the LTE REL.8 may be as shown in Table 1. For details, see Table 1, and details are not described here.
- the setting conversion factor may include a first setting conversion factor corresponding to the first coding conversion factor in the transport block size table and a second setting conversion factor corresponding to the second coding modulation level, and the first setting conversion The factor is different from the second set conversion factor.
- the first coded modulation level is a maximum coded modulation level in the transport block size table; the second coded modulation level is a non-maximum coded modulation level in the transport block size table.
- the first set conversion factor is 1.1; the second set conversion factor is 1.3.
- the processor 42 is further configured to use the number of pairs of the second physical resource block to be greater than When the number of the largest physical resource block pair of the block size table is changed, determining the TBS corresponding to the coded modulation level and corresponding to the number of the second physical resource block pair is corresponding to the coded modulation level and corresponding to the number of the largest physical resource block pair TBS.
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KR1020157024530A KR101717869B1 (ko) | 2013-03-21 | 2013-03-21 | 데이터 전송 방법, 기지국, 및 사용자 장비 |
PCT/CN2013/073005 WO2014146280A1 (zh) | 2013-03-21 | 2013-03-21 | 数据传输方法、基站及用户设备 |
JP2016503508A JP6047260B2 (ja) | 2013-03-21 | 2013-03-21 | データ送信方法、基地局及びユーザ装置 |
EP13878758.5A EP2858443B1 (en) | 2013-03-21 | 2013-03-21 | Data transmission method, base station, and user equipment |
CN201380000632.1A CN103547340B (zh) | 2013-03-21 | 2013-03-21 | 数据传输方法、基站及用户设备 |
US14/584,531 US20150117396A1 (en) | 2013-03-21 | 2014-12-29 | Data transmission method, base station, and user equipment |
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CN103547340A (zh) | 2014-01-29 |
CN103547340B (zh) | 2017-07-28 |
EP2858443A4 (en) | 2015-12-02 |
KR20150119046A (ko) | 2015-10-23 |
US20150117396A1 (en) | 2015-04-30 |
EP2858443A1 (en) | 2015-04-08 |
KR101717869B1 (ko) | 2017-03-17 |
EP2858443B1 (en) | 2017-05-10 |
JP2016519473A (ja) | 2016-06-30 |
JP6047260B2 (ja) | 2016-12-21 |
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