CN114944886A - Method and device for rate matching, and method and device for rate de-matching - Google Patents
Method and device for rate matching, and method and device for rate de-matching Download PDFInfo
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Abstract
The application provides a method and a device for rate matching and a method and a device for rate de-matching, wherein the method comprises the following steps: determining the receiving capability of a receiving end, wherein the receiving capability is used for indicating the maximum data processing capacity of the receiving end in the first transmission time, and/or the receiving capability is used for indicating the maximum data buffer capacity of the receiving end in the first transmission time, and the first transmission time is used for transmitting a first transmission block to which a first code block belongs; determining N from reception capability CB ，N CB The code block size used for rate matching; according to N CB The first code block is rate matched. According to the rate matching method provided by the embodiment of the application, the receiving end can adjust the size of the code block used for rate de-matching according to the processing capacity and/or the buffer capacity of the receiving end within a period of time, so that the receiving end is prevented from processing capacity overflow and/or buffer overflow, and the receiving success rate of the receiving end is improved.
Description
The present application is a divisional application, the original application having application number 201810351167.0, the original application date being 2018, 18/04, the entire content of the original application being incorporated by reference in the present application.
This application claims priority from chinese patent application filed on 16/04/2018 under the name of "rate matching method and apparatus, and rate de-matching method and apparatus", filed by the chinese patent office, application No. 201810339728.5, which is incorporated herein by reference in its entirety.
Technical Field
The present application relates to the field of communications, and in particular, to a method and an apparatus for rate matching, and a method and an apparatus for rate de-matching.
Background
In a wireless communication system, in order to improve communication reliability, a channel coding (abbreviated as "coding") mode is usually adopted to reduce a transmission code rate to improve reliability, and assuming that an information bit is K, a bit of data obtained after decoding is N, N is greater than or equal to K, and K-N bits are called redundant bits, so that an effective code rate is K/N. The sending end sends the decoded N-bit code words to the receiving end, and after the receiving end receives the N-bit code words, the receiving end corrects error code words in the transmission process by adopting a certain decoding mode and recovers correct K-bit code words.
The data block before encoding is called a Transport Block (TB), because the number of bits of the TB is large, a sending end usually splits one TB into a plurality of Code Blocks (CBs), each CB is encoded individually, and because physical resources used for transmitting the code blocks may not be consistent with physical time-frequency resources of the code blocks to be transmitted, bit retransmission or puncturing needs to be performed on the code blocks to be transmitted to match the bearing capacity of the physical time-frequency resources, this process is called rate matching, so that the plurality of encoded CBs need to be subjected to rate matching, then subjected to interleaving, cascading and the like, and then transmitted to a receiving end as a physical data block (codeword).
In a 5th-generation (5G) mobile communication system, a first transmission time of a TB on a carrier changes according to a change of a subcarrier interval, a scheduling time (a time domain resource allocated to the TB) of the TB is also flexible and variable, a maximum value of a data amount that a receiving end can process in a unit time is fixed, and a data amount that the receiving end can buffer is also fixed, so that the data amount transmitted by a transmitting end in the scheduling time in the 5G mobile communication system may exceed a processing capability and a buffering capability of the receiving end in the scheduling time, which causes a processing capability overflow or a buffer overflow of the receiving end, thereby reducing a receiving success rate of the receiving end.
Disclosure of Invention
The application provides a rate matching method and a computing device and a de-rate matching method and a de-rate matching device, which determine rate matching parameters according to the processing capacity and/or the buffering capacity of a receiving end in scheduling time, avoid the processing capacity overflow and/or the buffering overflow of the receiving end, and improve the receiving success rate of the receiving end.
In a first aspect, a rate matching method is provided, including: determining the receiving capability of a receiving end, wherein the receiving capability is used for indicating the maximum data processing capacity of the receiving end in the first transmission time, and/or the receiving capability is used for indicating the maximum data buffer capacity of the receiving end in the first transmission time, and the first transmission time is used for transmitting a first transmission block to which a first code block belongs; determining N from reception capability CB ，N CB The code block size used for rate matching; according to N CB The first code block is rate matched.
For example, when the receiving capability of the receiving end in the first transmission time is poor, the receiving end can select a smaller code block to perform de-rate matching, so that the data amount processed and/or buffered in the first transmission time is reduced, the processing capability overflow and/or buffer overflow of the receiving end is avoided, and the receiving success rate is improved; for another example, when the receiving capability of the receiving end in the first transmission time is strong, the receiving end may select a larger code block for rate de-matching, and reduce the code rate without exceeding the receiving capability of the receiving end, so as to obtain a higher receiving success rate.
Therefore, according to the rate matching method provided by this embodiment, the receiving end can adjust the code block size used for rate de-matching according to the processing capability and/or the buffering capability of the receiving end within a period of time (i.e., the first transmission time), thereby preventing the receiving end from overflowing the processing capability and/or the buffering, and improving the receiving success rate of the receiving end.
Optionally, determining the receiving capability of the receiving end includes:
according to
And S (i) The reception capability is determined, wherein,
is the maximum data rate of the carrier i, also called the peak rate of the carrier, or the maximum transmission rate, the carrier i is used for transmitting the first transport block, S (i) The duration of the first transmission time of the first transport block, called the first transmission duration, the receiving capability of the receiving end and
positively correlated, and the receiving capability of the receiving end is S (i) And (4) positively correlating.
Optionally, determining the receiving capability of the receiving end includes: according to
And S (i) The reception capability of the receiving end is determined, wherein,
is the size of the largest transmission block, S, which can be transmitted by the carrier i in the second transmission duration (i) The duration of the transmission time of the first transport block, called the first transmission duration, the carrier i used to transmit the first transport block, the receiving capability of the receiving end and
positive correlation, receiving capacity and said S (i) Positive correlation, the second transmission time being determined
The transmission duration and the receiving capacity are positively correlated with the reciprocal of the second transmission time. The first transmission duration and the second transmission duration may or may not be equal.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N ref N and N CB,max Determining N CB Wherein N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N. N is a radical of ref And N CB,max For indicating the amount of buffered data or the amount of data processed at the receiving end under different conditions, wherein N ref Is based on the value, N, obtained under the condition that the receiving capability of the receiving end is not limited CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the sending end will N ref N and N CB,max Minimum value among the three is used as code block size (N) for rate matching CB ) The data volume actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N ref ，N ref Greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。
Determining N from reception capability CB The method comprises the following steps: determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max The receiving capability of the receiving end is positively correlated; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N. N is a radical of CB,max For indicating the amount of buffer data or data throughput, N, at the receiving end CB,max Based on the value obtained from the receiving capability of the receiving end in the first transmission time (the receiving capability of the receiving end in the first transmission time may be limited), the sending end will send N and N CB,max Minimum value between the two as code block size (N) used in rate matching CB ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capacity of the receiving endAnd/or buffering capability, such that processing power overflow and/or buffering overflow may be avoided in situations where the receiving capability of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。
Optionally, N is determined according to the receiving capacity CB,max The method comprises the following steps: according to U (i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active fractional bandwidth BWP of the carrier i to the sum of the transmission bandwidth values of the active BWP of all active receiving carriers at the receiving end.
When the receiving end supports multiple carriers, the sending end also needs to determine the receiving capability of the receiving end on the carrier i according to the proportion of the transmission bandwidth value of the carrier i to the total bandwidth value of all activated receiving carriers, wherein the receiving capability of the receiving end on the carrier i is the U of the total receiving capability of the receiving end on the multiple carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'according to the maximum data processing quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM And the minimum value of the maximum data throughput, the maximum data throughput
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) For the first transmissionThe length of time; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'as the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM And the minimum value of the maximum data transmission quantity positively correlated with
And S (i) Positively correlated, and positively correlated with the inverse of the second transmission duration,
is the size of the largest transport block that the carrier i can transmit in the second transmission time, S (i) A duration of the first transmission time, referred to as a first transmission duration, a second transmission duration being determined for the first transmission duration
The duration of the second transmission time used; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
In this alternative, the transmit side is from the TBS LBRM And selecting a minimum value from the maximum data processing amount or the maximum data transmission amount of the carrier i in the first transmission time, and determining the size (N ') of the reference code block according to the minimum value' ref ) Followed by comparison of N' ref With respect to the size of N, one of the smaller values is selected as the code block size (N) used in rate matching of the first code block CB ) The data amount actually transmitted in the channel can be made not to exceed the processing capability and/or the buffering capability of the receiving end, so that the receiving capability of the receiving end can be avoidedProcessing power overflow and/or buffer overflow occurs in limited situations.
Optionally, the maximum data throughput is also associated with U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of the active BWPs of all active received carriers at the receiving end.
When the receiving end supports multiple carriers, the transmitting end further needs to determine the receiving capability of the receiving end on the carrier i according to the ratio of the transmission bandwidth value of the activated BWP of the carrier i to the sum of the transmission bandwidth values of the activated BWPs of all activated receiving carriers, where the receiving capability of the receiving end on the carrier i is U of the total receiving capability of the receiving end on multiple carriers (i) The optional method can avoid the overflow of processing capacity and/or buffer at the receiving end in the multi-carrier scene.
Optionally, the first transport block is a high priority transport block, the first transport block includes C code blocks, C is a positive integer, and a size of each of the C code blocks before rate matching is N CB The method further comprises the following steps: according to C and N CB Determining the buffer data volume or processing data volume occupied by the high priority transmission block, wherein the buffer data volume occupied by the high priority transmission block is N CB C; determining the residual cache data amount according to the maximum data cache amount of the carrier i in the first transmission time and the cache data amount occupied by the high-priority transmission block, wherein the residual cache data amount is equal to the maximum data cache amount minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual cache data volume is used for caching low-priority data; determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block at the time of rate matching, where N CB,lp Is N lp 、N ref And N CB,max,lp Minimum value of (1), N lp For each code block size, N, of a low priority transport block ref Is the first reference code block size, N CB,max,lp The maximum value of the data volume of the code block which is determined based on the residual cache data volume and can be transmitted by the carrier i and is used for carrying out rate matching; according to N CB,lp For low priority transmissionThe code blocks of the block are rate matched.
When a plurality of TBs need to be transmitted simultaneously, the transmitting end can determine the code rate matching parameter of each TB according to the priority of the TB, the high-priority TB determines the rate matching parameter according to the method, and after the cache data volume occupied by the high-priority TB is determined, the size (N) of the code block of the low-priority TB which can be transmitted by the carrier i is determined according to the current residual cache resources or data processing resources CB,max,lp ) And comparing N CB,max,lp 、N lp And N ref Of the low priority TBs, selecting a minimum value as the rate-matched code block value (N) of the code block of the low priority TB CB,lp ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capability and/or the buffering capability of the receiving end, so that the processing capability overflow and/or the buffering overflow caused by receiving the low-priority TB under the condition that the receiving capability of the receiving end is limited can be avoided.
Optionally, the method further comprises: receiving a notification message from a receiving end, wherein the notification message is used for indicating that the size of data received by the receiving end exceeds the receiving capability of the receiving end; the size of data transmitted per unit time is reduced according to the notification message.
The scheme can reduce the data volume transmitted in the channel in time, so that the data volume actually transmitted in the channel does not exceed the processing capacity and/or the cache capacity of the receiving end.
Optionally, the notification message further comprises a suggested transmission rate, which is a data transmission rate matching the receiving capability of the receiving end.
The proposed transmission rate is a data transmission rate determined by the receiving end based on the receiving capability within the current first transmission time, and the sending end determines the code block size used in rate matching according to the proposed transmission rate, so that the data volume actually transmitted in the channel does not exceed the processing capability and/or the buffering capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or Medium Access Control (MAC) layer signaling.
In a second aspect, a de-rate matching method is providedThe method comprises the following steps: determining the receiving capability of the receiving end, wherein the receiving capability is used for indicating the maximum data processing capacity of the receiving end in the first transmission time, and/or the receiving capability is used for indicating the maximum data buffer amount of the receiving end in the first transmission time, and the first transmission time is used for receiving the first transmission block; determining N from reception capability CB ，N CB The size of a code block used for rate de-matching; according to N CB And performing rate de-matching on the first transmission block. For the receiving end, the transmission time may also be considered as the reception time.
For example, when the receiving capability of the receiving end in the first transmission time is poor, the receiving end can select a smaller code block to perform de-rate matching, so that the data amount processed and/or buffered in the first transmission time is reduced, the processing capability overflow and/or buffer overflow of the receiving end is avoided, and the receiving success rate is improved; for another example, when the receiving capability of the receiving end in the first transmission time is strong, the receiving end may select a larger code block to perform rate de-matching, and reduce the code rate on the premise of not exceeding the receiving capability of the receiving end, so as to obtain a higher receiving success rate.
Therefore, according to the rate matching method provided by this embodiment, the receiving end can adjust the code block size used for rate de-matching according to the processing capability and/or the buffering capability of the receiving end within a period of time (i.e., the first transmission time), thereby preventing the receiving end from overflowing the processing capability and/or the buffering, and improving the receiving success rate of the receiving end.
Optionally, determining the receiving capability of the receiving end includes: according to
And S (i) The reception capability is determined, wherein,
for the maximum data rate of carrier i, which is used for transmitting the first transport block, S (i) The duration of the first transmission time of the first transport block, called the first transmission duration, the receiving capability of the receiving end and
positively correlated, and the receiving capability of the receiving end is S (i) And (4) positive correlation.
Optionally, determining the receiving capability of the receiving end includes:
according to
And S (i) The reception capability of the receiving end is determined, wherein,
is the size of the largest transmission block, S, which can be transmitted by the carrier i in the second transmission duration (i) The duration of the transmission time of the first transport block, called the first transmission duration, the carrier i used to transmit the first transport block, the receiving capability and the receiving capability of the receiving end
Positive correlation, receiving capacity and said S (i) Positive correlation, the second transmission time being determined
The transmission duration and the receiving capacity are positively correlated with the reciprocal of the second transmission time. The first transmission duration and the second transmission duration may or may not be equal.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: determining N according to receiving capability of receiving end CB,max ，N CB,max For the size of a single code block that the receiving end can process within the first transmission timeSmall maximum value, N CB,max Positively correlated with the receiving capability of the receiving end; according to N ref N and N CB,max Determining N CB Wherein N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N.
N ref And N CB,max For indicating the amount of buffered data of the receiving end under different conditions, wherein N ref Is based on the value, N, obtained under the condition that the receiving capability of the receiving end is not limited CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the receiving end will N ref N and N CB,max The minimum value among the three is the code block size (N) used for rate de-matching CB ) The data volume actually processed and buffered in the first transmission time can be made not to exceed the receiving capacity of the receiving end, so that processing capacity overflow and/or buffer overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving end has limited receiving capability during the first transmission time and the first transmission block is too large, N is greater than N ref ，N ref Greater than N CB,max The receiving end can convert N CB,max Code block size (N) used for rate de-matching CB )。
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N. N is a radical of CB,max For indicating the amount of buffered data at the receiving end, where N CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the receiving end will receive N and N CB,max Minimum between the twoCode block size (N) used in de-rate matching CB ) The data volume actually processed and buffered in the first transmission time can be enabled not to exceed the receiving capacity of the receiving end, so that the processing capacity overflow and/or the buffer overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N CB,max The receiving end can convert N CB,max Code block size (N) used for rate de-matching CB )。
Optionally, N is determined according to the receiving capacity CB,max The method comprises the following steps: according to U (i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of all active BWPs of all active receive carriers at the receiving end.
When the receiving end supports multiple carriers, the receiving end needs to determine the receiving capability of the receiving end on the carrier i according to the ratio of the transmission bandwidth value of the carrier i to the total bandwidth value of all activated receiving carriers, wherein the receiving capability of the receiving end on the carrier i is U of the total receiving capability of the receiving end on multiple carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'according to the maximum data processing quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM And the minimum value of the maximum data processing quantity positively correlated with
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) Is the duration of the transmission time; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'from the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', to reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM Positively correlated with the minimum of the maximum data transfer quantities, the maximum data transfer quantity being
And S (i) A positive correlation, positively correlated with the inverse of the second transmission duration,
is the size of the largest transmission block, S, that the carrier i can transmit within the second transmission duration (i) A duration of the first transport block, referred to as a first transmission time, a second transmission time for determining the first transmission time
The transmission duration of the time; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'as the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM Positively correlated with the minimum of the maximum data transmission rates, maximumLarge data transmission quantity and
and S (i) Positively correlated, and positively correlated with the inverse of the second transmission duration,
is the size of the largest transport block that the carrier i can transmit in the second transmission time, S (i) The duration of the first transmission time is called a first transmission duration, and the second transmission duration is determined as
The duration of the second transmission time used; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
In this alternative, the receiving side is from the TBS LBRM And selecting a minimum value from the maximum data transmission quantity of the carrier i in the first transmission time, and determining the size (N ') of the reference code block according to the minimum value' ref ) Then N 'are compared' ref Selecting one of smaller values as the code block size (N) used when the first code block is rate-matched with the size of N CB ) The data volume actually processed by the receiving end in the first transmission time can be enabled not to exceed the receiving capacity of the receiving end, and therefore processing capacity overflow and/or buffer overflow can be avoided under the condition that the receiving capacity of the receiving end is limited.
Optionally, the maximum amount of data transfer is also associated with U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of all active BWPs for all active received carriers at the receiving end.
When the receiving end supports multiple carriers, the receiving end needs to determine the receiving capability of the receiving end on the carrier i according to the ratio of the transmission bandwidth value of the carrier i to the total bandwidth value of all activated receiving carriers, wherein the receiving capability of the receiving end on the carrier i is the total receiving capability of the receiving end on multiple carriersU of (1) (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene.
Optionally, the first transport block is a high priority transport block, the first transport block includes C code blocks, C is a positive integer, and a size of each of the C code blocks before rate de-matching is N CB The method further comprises the following steps: according to C and N CB Determining the buffer data volume occupied by the high priority transmission block, wherein the buffer data volume occupied by the high priority transmission block is N CB C, determining the residual cache data amount according to the maximum data cache amount of the carrier i in the first transmission time and the cache data amount occupied by the high-priority transmission block, wherein the residual cache data amount is equal to the maximum data cache amount minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data; determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block at de-rate matching, where N CB,lp Is N lp 、N ref And N CB,max,lp Minimum value of (1), N lp For each code block size, N, of a low priority transport block ref Is the first reference code block size, N CB,max,lp The maximum value of the data quantity of the code block which is determined based on the residual cache data quantity, can be transmitted by the carrier i and is used for rate de-matching; according to N CB,lp Rate de-matching code blocks of a low priority transport block.
When a plurality of TBs need to be transmitted simultaneously, the receiving end can determine the code block size used by each TB during rate de-matching according to the priority of the TB, the high-priority TB determines the code block size used during rate de-matching according to the method, and after the buffer data volume required by the high-priority TB for rate de-matching is determined, the size (N) of the code block of the low-priority TB which can be transmitted by the carrier i is determined according to the current residual buffer data volume CB,max,lp ) And comparing N CB,max,lp 、N lp And N ref Of the code blocks of the low priority TBs, from which a minimum value is selected as the de-rate-matched code block value (N) of the code block of the low priority TB CB,lp ) Can make the receiving endThe data volume actually processed in the first transmission time does not exceed the receiving capacity of the receiving end, so that the processing capacity overflow and/or the buffer overflow caused by receiving the low-priority TB under the condition that the receiving capacity of the receiving end is limited can be avoided.
Optionally, the method further comprises: and sending a notification message to the sending end, wherein the notification message is used for indicating that the size of the data received by the receiving end exceeds the receiving capability of the receiving end.
The scheme can reduce the data volume transmitted in the channel in time, so that the data volume actually transmitted in the channel does not exceed the processing capacity and/or the cache capacity of the receiving end.
Optionally, the notification message further comprises a suggested transmission rate, which is a data transmission rate matching the receiving capability of the receiving end.
The proposed transmission rate is a data transmission rate determined by the receiving end based on the receiving capability within the current first transmission time, and the sending end determines the code block size used in rate matching according to the proposed transmission rate, so that the data volume actually transmitted in the channel does not exceed the processing capability and/or the buffering capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or medium access control MAC layer signaling.
In a third aspect, a rate matching apparatus is provided, which may be a communication device (e.g., a terminal device or a network device) or a chip within the communication device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a communication device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the communication device may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored by the storage unit to cause the communication device to perform the method of one of the first aspect and its optional embodiments. When the apparatus is a chip within a communication device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes instructions stored by a storage unit (e.g., a register, a cache, etc.) within the chip or a storage unit (e.g., a read-only memory, a random access memory, etc.) external to the chip within the communication device, so as to cause the communication device to perform the method of one of the first aspect and its optional embodiments.
In a fourth aspect, a de-rate matching apparatus is provided, where the apparatus may be a communication device (e.g., a terminal device or a network device), and may also be a chip within the communication device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a communication device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the communication device may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored by the storage unit to cause the communication device to perform the method of one of the first aspect and its optional embodiments. When the apparatus is a chip in a communication device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes instructions stored by a storage unit (e.g., a register, a cache, etc.) within the chip or a storage unit (e.g., a read-only memory, a random access memory, etc.) external to the chip within the communication device, so as to cause the communication device to perform the method of one of the first aspect and its optional embodiments.
In a fifth aspect, a network system is provided, where the network system includes the rate matching apparatus in the third aspect and the de-rate matching apparatus in the fourth aspect.
In a sixth aspect, there is provided a computer program product comprising: computer program code for causing a transmitting end to perform the method according to the first aspect when said computer program code is run by a communication unit, processing unit or transceiver, processor of the transmitting end.
In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code for causing a receiving end to perform the method according to the second aspect when the computer program code is run by a communication unit, processing unit or transceiver, processor of the receiving end.
In an eighth aspect, a computer storage medium is provided for storing computer software instructions for the sender, which contains a program designed to execute the first aspect.
In a ninth aspect, a computer storage medium is provided for storing computer software instructions for the receiving end, which comprises a program designed for executing the second aspect.
In a tenth aspect, a chip is provided, in which instructions are stored which, when run on a transmitting side, cause the chip to perform the method of the first aspect.
In an eleventh aspect, a chip is provided, in which instructions are stored which, when run on a receiving side, cause the chip to perform the method of the second aspect.
Drawings
FIG. 1 is a communication system suitable for use in the present application;
FIG. 2 is a schematic diagram of a communication method suitable for use in the present application;
fig. 3 is a schematic diagram of a rate matching method according to an embodiment of the present application;
fig. 4 is a schematic diagram of a method for rate de-matching according to an embodiment of the present application;
fig. 5 is a schematic diagram of a rate matching apparatus according to an embodiment of the present application;
fig. 6 is a schematic diagram of a de-rate matching apparatus according to an embodiment of the present application;
fig. 7 is a schematic diagram of a terminal device provided in an embodiment of the present application;
fig. 8 is a schematic diagram of an access network device according to an embodiment of the present application;
fig. 9 is a schematic diagram of a communication apparatus for rate matching and/or de-rate matching according to an embodiment of the present disclosure;
fig. 10 is a schematic diagram of another rate matching method provided in the embodiment of the present application;
fig. 11 is a schematic diagram of another method for rate de-matching according to an embodiment of the present application;
fig. 12 is a schematic diagram of another rate matching apparatus provided in the embodiment of the present application;
fig. 13 is a schematic diagram of another apparatus for rate de-matching according to an embodiment of the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
Fig. 1 illustrates a communication system 100 to which the present application is applicable. The communication system 100 includes an access network device 110 and a terminal device 120, the access network device 110 and the terminal device 120 communicate via a wireless network, and when the terminal device 120 transmits data, the wireless communication module may encode information for transmission, and specifically, the wireless communication module may obtain a number of information bits to be transmitted to the access network device 110 via a channel, for example, the information bits generated by a processing module, received from other devices, or stored in a storage module. These information bits may be contained in one or more TBs, which may be segmented to produce multiple CBs.
When the transmission direction of the communication system 100 is uplink transmission, the terminal device 120 is a sending end, and the access network device 110 is a receiving end, and when the transmission direction of the communication system 100 is downlink transmission, the access network device 110 is a sending end, and the terminal device 120 is a receiving end.
The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as: the 5G mobile communication system described in the present application includes a non-standalone (NSA) 5G mobile communication system and/or a Standalone (SA) 5G mobile communication system. The technical scheme provided by the embodiment of the application can also be applied to future communication systems, such as a sixth generation mobile communication system.
In this application, a terminal device may be referred to as an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. An access terminal may be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G communication system.
The access network device may be a Base Transceiver Station (BTS) in a Code Division Multiple Access (CDMA) system, a base station (node B, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node B (eNB) in a Long Term Evolution (LTE) system, or a base station (gNB) in a 5G communication system, where the base stations are merely examples, and the access network device may also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.
The above-described communication system to which the present application is applied is only an example, and the communication system to which the present application is applied is not limited thereto, and for example, the number of access network devices and terminal devices included in the communication system may be other numbers.
To facilitate understanding of the present application, before describing the rate matching method provided in the embodiments of the present application, a brief description will be made of concepts related to the present application.
In order to obtain a better decoding effect, if the decoding is unsuccessful, the receiving end stores the soft information of the received data, and the storage of the soft information needs to consume the storage resource of the receiving end. If the coded bits of each code block are N bits, the receiving end needs to store N · L bits, where L is the effective bit number of soft information for each received data. When the buffer of the receiving end is limited, in order to reduce the buffer amount of the receiving end, the sending end may perform rate matching on the code blocks by using a Limited Buffer Rate Matching (LBRM) technique, as shown in fig. 2, the sending end encodes K-bit information bits to obtain code blocks with a size of N bits, and if the number of bits N of the code blocks is less than or equal to N bits ref ，N ref The size of the reference code block is obtained, the sending end performs rate matching according to the actual code block size, and if N is larger than N ref Then the sending end will follow N ref Carrying out rate matching on the coded code block, wherein the code block size N used by the sending end in the rate matching CB Is N ref And minimum of N, i.e. N CB ＝min(N,N ref ). Above-mentioned determination of N CB I.e. bit selection.
For example, the code block size after coding is 100 bits, N ref Equal to 90 bits, then N CB Equal to 90 bits, i.e. the first 90 bits are selected from 100 bits for rate matching, and the last 10 bits are discarded, thereby reducing the amount of data that needs to be stored at the receiving end. Because the redundant bits are added in the information bits during encoding, a receiving end can decode the information bits according to the redundant bits, and therefore, under the condition that the number of discarded bits is small and the channel condition is good, the bit selection cannot cause decoding failure of the receiving end.
The rate matching method provided by the embodiment of the present application will be described in detail below.
Fig. 3 is a schematic diagram illustrating a rate matching method according to an embodiment of the present application. The device for executing the method 300 shown in fig. 3 is a transmitting end, and the method 300 includes:
s310, determining a receiving capability of the receiving end, where the receiving capability is used to indicate a maximum data throughput of the receiving end in the first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end in the first transmission time, where the first transmission time is used to transmit a first transport block to which the first code block belongs.
The receiving capability may be a maximum value of the data amount processed by the receiving end in unit time, the transmitting end may calculate a maximum data processing amount of the receiving end in the first transmission time according to the maximum value of the data amount processed by the receiving end in unit time, the receiving capability may also be a maximum value of a transport block that the receiving end can receive in the first transmission time, and may also be another parameter for indicating the maximum data processing amount of the receiving end in the first transmission time, and similarly, the receiving capability may also be any parameter for indicating the maximum data buffer amount of the receiving end in the first transmission time, which is not limited in this application.
In the rate matching process, the first code block refers to a code block that is channel-coded and has not undergone bit selection.
S320, determining N according to the receiving capacity CB ，N CB For the code block size used in rate matching.
N CB Is the code block size matched to the receiving capability of the receiving end, e.g. the receiving capability of the receiving end is at most receiving X bits of data in the first transmission time, N CB A value less than or equal to X divided by Y, where Y is the number of code blocks into which the first transport block is divided.
S330, according to N CB The first code block is rate matched.
For example, the transmitting end may select N and N according to a scheduling time-frequency resource and a Modulation and Coding Scheme (MCS) table CB The corresponding modulation coding parameters perform rate matching on the first code block, and a specific rate matching method may refer to a rate matching method in the prior art, which is not described herein again for brevity.
According to the method provided by the embodiment, when the receiving capacity of the receiving end in the first transmission time is poor, the sending end can select a smaller code block to perform rate matching, so that the code rate is improved, the data volume transmitted in the first transmission time is reduced, the processing capacity overflow and/or the buffer overflow of the receiving end are avoided, and the receiving success rate is improved; or, when the receiving capability of the receiving end in the first transmission time is stronger, the sending end can select a larger code block for rate matching, and the code rate is reduced on the premise of not exceeding the receiving capability of the receiving end, so as to obtain a higher receiving success rate.
Therefore, the rate matching method provided in this embodiment can adjust the size of the code block used for rate matching according to the processing capability and/or the buffering capability of the receiving end within a period of time (i.e., the first transmission time), thereby preventing the receiving end from suffering from processing capability overflow and/or buffer overflow, and improving the receiving success rate of the receiving end.
Optionally, S310 includes:
according to
And S (i) The reception capability is determined, wherein,
is the maximum data rate, also called peak rate or maximum transmission rate, of the carrier i used for transmitting the first transport block, S (i) The duration of the first transmission time of the first transport block is called the first transmission duration, the receiving capability of the receiving end and
positively correlated, and the receiving capability of the receiving end is S (i) And (4) positively correlating.
In this application, the positive correlation of O with M means: when M increases, O also increases, but the manner of increasing M and O is not limited, and for example, when M increases linearly, O may increase linearly or may increase non-linearly. Alternatively, the first and second liquid crystal display panels may be,
a positive correlation of O with M may also refer to: when M decreases, O also decreases, but the manner of decreasing M and O is not limited, for example, when M decreases linearly, O may decrease linearly or may decrease non-linearly.
M and O can be any two physical quantities, e.g., O is the receiving capability of the receiving end and M is
Or S (i) . The above explanations of positive correlation apply equally to positive correlation in other parts of the application.
Optionally, S310 includes:
according to
And S (i) The reception capability of the receiving end is determined, wherein,
is the size of the largest transport block that can be transmitted by the carrier i in the second transmission time, S (i) A duration of the first transmission time, called the first transmission duration, a carrier i for transmitting the first transport block, a receiving capability of the receiving end and
positive correlation, receiving capacity and S (i) Positive correlation, second transmission time being used for determining
The receiving capability of the receiving end is inversely related to the second transmission time.
In this application, the negative correlation of E and F means: f decreases as E increases, and the specific manner in which F decreases with increasing E is not limited, e.g., O may decrease linearly or non-linearly as E increases linearly. Alternatively, the first and second electrodes may be,
negative correlation of E with F means: when E decreases, F increases, and the specific manner in which F increases with a decrease in E is not limited, for example, when E decreases linearly, F may increase linearly or may increase non-linearly.
E and F may be any two physical quantities, E is the receiving capability of the receiving end, and F is the second transmission time. The above explanations of negative correlation apply equally to negative correlation in other parts of the application.
Optionally, S320 includes:
determining N according to receiving capability of receiving end CB,max ，N CB,max For the maximum value of the size of a single code block that the receiving end can process in the first transmission time，N CB,max The receiving capability of the receiving end is positively correlated; according to N ref N and N CB,max Determining N CB Wherein N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N.
N ref And N CB,max For indicating the amount of buffered data of the receiving end under different conditions, wherein N ref Is based on the value, N, obtained under the condition that the receiving capability of the receiving end is not limited CB,max Based on the value obtained from the receiving capability of the receiving end during the first transmission time (the receiving capability of the receiving end may be limited during the first transmission time), the sending end will send N ref N and N CB,max The minimum value among the three is used as the code block size (N) used for rate matching CB ) The data volume actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N ref ，N ref Greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB ). N may be calculated according to the method described in section 5.4.2.1 of the communications Standard document (3GPP TS 38.212V F.1.0) ref ，N CB,max The calculation method of (2) can refer to the calculation methods in other embodiments below.
Optionally, N is determined according to the receiving capacity CB,max The method comprises the following steps:
according to U (i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of all active BWPs of all active receive carriers at the receiving end.
When the receiving end supports multiple carriers, the transmitting end also needs to occupy all excited carriers according to the transmission bandwidth value of the carrier iThe ratio of the total bandwidth value of the active receiving carriers determines the receiving capacity of the receiving end on the carrier i, wherein the receiving capacity of the receiving end on the carrier i is the U of the total receiving capacity of the receiving end on a plurality of carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene. The transmission bandwidth value of the carrier i may be a bandwidth value of the maximum bandwidth supported by the carrier i, or may be another bandwidth value. U shape (i) The following examples may be referred to for the calculation method of (1).
Optionally, S320 includes:
according to TBS LBRM And determining N 'according to the maximum data processing quantity of the carrier i in the first transmission time' ref Wherein TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM And the minimum value of the maximum data throughput, the maximum data throughput
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) Is the duration of the time transmitted; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, N is determined according to the receiving capacity CB The method comprises the following steps: according to TBS LBRM And determining N 'from the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM Positively correlated with the minimum of the maximum data transfer quantities, the maximum data transfer quantity being
And S (i) A positive correlation, positively correlated with the inverse of the second transmission duration,
is the size of the largest transmission block, S, that the carrier i can transmit within the second transmission duration (i) A duration of the first transport block, referred to as a first transmission time, a second transmission time for determining the first transmission time
The transmission duration of the time; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
In this alternative, the transmit side is from the TBS LBRM And selecting a minimum value from the maximum data transmission quantity of the carrier i in the first transmission time, and determining the size (N ') of the reference code block according to the minimum value' ref ) Then N 'are compared' ref With respect to the size of N, one of smaller values is selected as the code block size (N) used when the first code block is rate-matched CB ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. TBS LBRM Can be calculated according to the maximum multiple-input multiple-output (MIMO) layer number, the maximum modulation order and the maximum code rate supported by the receiving end, and can calculate the TBS according to the method described in section 5.4.2.1 of the communication standard document (3GPP TS 38.212V f.1.0) LBRM 。
Optionally, the maximum amount of data transfer is also associated with U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of all active BWPs for all active received carriers at the receiving end.
When the receiving end supports multiple carriers, the transmitting end also needs to determine that the receiving end is on the carrier i according to the proportion of the activated transmission bandwidth value of the carrier i to the total bandwidth value of all activated receiving carriersWherein the receiving capability of the receiving end on the carrier i is U of the total receiving capability of the receiving end on a plurality of carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene. U shape (i) The following examples may be referred to for the calculation method of (1).
Optionally, the first transport block is a high priority transport block, the first transport block includes C code blocks, C is a positive integer, and a size of each of the C code blocks before rate matching is N CB The method 300 further comprises:
according to C and N CB Determining the buffer data volume occupied by the high priority transmission block, wherein the buffer data volume occupied by the high priority transmission block is N CB C; determining the residual cache data amount according to the maximum data cache amount of the carrier i in the first transmission time and the cache data amount occupied by the high-priority transmission block, wherein the residual cache data amount is equal to the maximum data cache amount minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual cache data volume is used for caching low-priority data; determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code blocks for low priority transport blocks when rate matching is performed, where N CB,lp Is N lp 、N ref And N CB,max,lp Minimum value of (1), N lp For each code block size, N, of a low priority transport block ref Is the first reference code block size, N CB,max,lp The maximum value of the data amount of the code block for rate matching, which is determined based on the remaining buffer data amount and can be transmitted by the carrier i; according to N CB,lp Rate matching is performed on code blocks of a low priority transport block.
When a plurality of TBs need to be transmitted simultaneously, the transmitting end can determine the code rate matching parameter of each TB according to the priority of the TB, the high-priority TB determines the rate matching parameter according to the method, and after the cache data volume occupied by the high-priority TB is determined, the size (N) of the code block of the low-priority TB which can be transmitted by the carrier i is determined according to the current residual cache resources CB,max,lp ) And comparing N CB,max,lp 、N lp And N ref Is largeSmall, from which a minimum value is selected as the rate-matched code block value (N) for the code block of the low priority TB CB,lp ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capability and/or the buffering capability of the receiving end, so that the processing capability overflow and/or the buffering overflow caused by receiving the low-priority TB under the condition that the receiving capability of the receiving end is limited can be avoided.
Optionally, the method 300 further comprises:
receiving a notification message from a receiving end, wherein the notification message is used for indicating that the size of data received by the receiving end exceeds the receiving capability of the receiving end; the size of data transmitted per unit time is reduced according to the communication message.
The scheme can reduce the data volume transmitted in the channel in time, so that the data volume actually transmitted in the channel does not exceed the processing capacity and/or the buffering capacity of a receiving end.
Optionally, the notification message further includes a suggested transmission rate, which is a data transmission rate matching the receiving capability of the receiving end.
The proposed transmission rate is a data transmission rate determined by the receiving end based on the receiving capability within the current first transmission time, and the sending end determines the code block size used in rate matching according to the proposed transmission rate, so that the data volume actually transmitted in the channel does not exceed the processing capability and/or the buffering capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or MAC layer signaling.
Next, referring to fig. 10, another rate matching method 1000 provided in the embodiment of the present application is described, where the method includes S1010, S1020, and S1030.
S1010 is the same as S310 in the rate matching method 300 described above, S1030 is the same as S330 in the method 300, and the specific implementation manners of S310 and S330 are also applicable to S1010 and S1030, which are not described again.
S1020 is similar to S320 in method 300, except that optionally S1020 comprises:
determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max The receiving capability of the receiving end is positively correlated; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N.
N CB,max For indicating the amount of buffered data, N, of the receiving end under different conditions CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the sending end will N ref N and N CB,max Minimum value among the three is used as code block size (N) for rate matching CB ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。N CB，max The calculation method of (2) can refer to the calculation methods in other embodiments below. At this point, it may not be necessary to obtain N as described in method 300 ref 。
Besides, the specific implementation manner of S320 is also applicable to S1020, and is not described again.
Other steps that may be included in the method 300 besides S310, S320, and S330 and their specific implementation are also applicable to the method 1000, and moreover, the technical effects of the method 300 and the explanations of the related terms may be applicable to the method 1000 and are not described in detail.
The rate matching method provided by the embodiment of the present application is described in detail above from the perspective of the transmitting end, and the rate de-matching method provided by the embodiment of the present application is described below from the perspective of the receiving end.
Fig. 4 is a schematic diagram illustrating a method for rate de-matching according to an embodiment of the present application. The apparatus for performing the method 400 shown in fig. 4 is a receiving end, and the method 400 includes:
s410, determining a receiving capability of the receiving end, where the receiving capability is used to indicate a maximum data throughput of the receiving end in the first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end in the first transmission time, where the first transmission time is used to receive the first transport block.
The receiving capability may be a maximum value of the data amount processed by the receiving end in the unit time, the receiving end may calculate a maximum data processing amount of the receiving end in the first transmission time according to the maximum value of the data amount processed by the receiving end in the unit time, the receiving capability may also be a maximum value of the data amount that the receiving end can process in the first transmission time, and may also be another parameter for indicating the maximum data processing amount of the receiving end in the first transmission time.
It should be noted that, for the receiving end, the first transmission time is the time for receiving the first transport block.
S420, determining N according to receiving capacity CB ，N CB For the code block size used in de-rate matching.
N CB Is the code block size matched to the receiving capability of the receiving end, e.g., the receiving capability of the receiving end is at most receiving X bits of data in the first transmission time, N CB A value less than or equal to X divided by Y, where Y is the number of code blocks into which the first transport block is divided.
S430, according to N CB And performing rate de-matching on the first transmission block.
For example, the transmitting end may select N from the MCS table CB The corresponding modulation coding parameters perform rate de-matching on the first code block, and the specific rate de-matching method may refer to a rate de-matching method in the prior art, which is not described herein again for brevity.
According to the method provided by the embodiment, when the receiving capacity of the receiving end in the first transmission time is poor, the sending end can select a smaller code block to perform rate matching, so that the code rate is improved, the data volume transmitted in the first transmission time is reduced, the processing capacity overflow and/or the buffer overflow of the receiving end are avoided, and the receiving success rate is improved; or, when the receiving capability of the receiving end in the first transmission time is stronger, the sending end can select a larger code block for rate matching, and the code rate is reduced on the premise of not exceeding the receiving capability of the receiving end, so as to obtain a higher receiving success rate.
Therefore, the rate matching method provided in this embodiment can adjust the size of the code block used for rate matching according to the processing capability and/or the buffering capability of the receiving end within a period of time (i.e., the first transmission time), thereby preventing the receiving end from suffering from processing capability overflow and/or buffer overflow, and improving the receiving success rate of the receiving end.
Optionally, S310 includes:
according to
And S (i) The reception capability is determined, wherein,
for the maximum data rate of carrier i, which is used for transmitting the first transport block, S (i) The duration of the first transmission time of the first transmission block, the receiving capability of the receiving end and
positively correlated, and the receiving capability of the receiving end is S (i) And (4) positive correlation.
Optionally, S410 includes:
according to
And S (i) The reception capability of the receiving end is determined, wherein,
is the size of the largest transport block that can be transmitted by the carrier i in the second transmission time, S (i) A duration of the first transmission time, called the first transmission duration, a carrier i for transmitting the first transport block, a receiving capability of the receiving end and
positive correlation, receiving capacity and said S (i) Positive correlation, second transmission time being used for determining
The receiving capability of the receiving end is inversely related to the second transmission time.
Optionally, S420 includes:
determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N ref N and N CB,max Determining N CB Wherein, N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N.
N ref And N CB,max For indicating the amount of buffered data of the receiving end under different conditions, wherein N ref Is based on the value, N, obtained under the condition that the receiving capability of the receiving end is not limited CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the receiving end will N ref N and N CB,max The minimum value among the three is the code block size (N) used for rate de-matching CB ) The data volume actually processed and buffered in the first transmission time can be enabled not to exceed the receiving capacity of the receiving end, so that the processing capacity overflow and/or the buffer overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N ref ，N ref Greater than N CB,max The receiving end can convert N CB,max Code block size (N) used for rate de-matching CB ). N may be calculated as described in section 5.4.2.1 of the communications Standard document (3GPP TS 38.212V F.1.0) ref ，N CB,max The calculation method of (2) can refer to the calculation methods in other embodiments below.
Optionally, N is determined according to the receiving capacity CB,max The method comprises the following steps:
according to U (i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of all active BWPs of the receiving end.
When the receiving end supports multiple carriers, the sending end also needs to determine the receiving capability of the receiving end on the carrier i according to the proportion of the transmission bandwidth value of the carrier i to the total bandwidth value of all activated receiving carriers, wherein the receiving capability of the receiving end on the carrier i is the U of the total receiving capability of the receiving end on the multiple carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene. U shape (i) The following examples may be referred to for the calculation method of (1).
Optionally, S420 includes:
according to TBS LBRM And carrier i in a first transmission timeDetermining N 'by maximum data processing amount' ref Wherein TBS LBRM Carrier i is used to transmit the first transport block, N ', to reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM And the minimum value of the maximum data throughput, the maximum data throughput
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) Is the duration of the time transmitted; according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
In this alternative, the receiving side is from the TBS LBRM And selecting a minimum value from the maximum data transmission quantity of the carrier i in the first transmission time, and determining the size (N ') of the reference code block according to the minimum value' ref ) Followed by comparison of N' ref Selecting one of smaller values as the code block size (N) used when the first code block is rate-matched with the size of N CB ) The data volume actually processed by the receiving end in the first transmission time can be enabled not to exceed the receiving capacity of the receiving end, and therefore processing capacity overflow and/or buffer overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. TBS LBRM The TBS can be calculated according to the maximum MIMO layer number, the maximum modulation order and the maximum code rate supported by the receiving end, and can be calculated according to the method described in section 5.4.2.1 of the communication standard document (3GPP TS 38.212V f.1.0) LBRM 。
Optionally, the maximum amount of data transfer is also associated with U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of all active BWPs for all active received carriers at the receiving end.
When the receiving end supports multiple carriers, the receiving end needs to take all the transmission bandwidth values according to the activated BWP of the carrier iThe ratio of the total bandwidth value of the active BWP actively receiving the carriers determines the receiving capability of the receiver on the carrier i, wherein the receiving capability of the receiver on the carrier i is U of the total receiving capability of the receiver on multiple carriers (i) The optional method can avoid processing capacity overflow and/or buffer overflow at the receiving end in the multi-carrier scene. U shape (i) The following examples may be referred to for the calculation method of (1).
Optionally, the first transport block is a high priority transport block, the first transport block includes C code blocks, C is a positive integer, and a size of each of the C code blocks before rate matching is N CB The method 400 further includes:
according to C and N CB Determining the buffer data volume occupied by the high priority transmission block, wherein the buffer data volume occupied by the high priority transmission block is N CB C; determining the residual cache data amount according to the maximum data cache amount of the carrier i in the first transmission time and the cache data amount occupied by the high-priority transmission block, wherein the residual cache data amount is equal to the maximum data cache amount minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data; determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block at the time of rate matching, where N CB,lp Is N lp 、N ref And N CB,max,lp Minimum value of (1), N lp For each code block size, N, of a low priority transport block ref Is the first reference code block size, N CB,max,lp The maximum value of the data volume of the code block which is determined based on the residual cache data volume and can be transmitted by the carrier i and is used for carrying out rate matching; according to N CB,lp Rate matching is performed on code blocks of a low priority transport block.
When a plurality of TBs need to be transmitted simultaneously, the receiving end can determine the code block size used by each TB in the rate de-matching process according to the priority of the TB, the high-priority TB determines the code block size used in the rate de-matching process according to the method, and after the buffer data volume required by the high-priority TB in the rate de-matching process is determined, the load is determined according to the current residual buffer data volumeSize (N) of code block of low priority TB that wave i can transmit CB,max,lp ) And comparing N CB,max,lp 、N lp And N ref Of the code blocks of the low priority TBs, from which a minimum value is selected as the de-rate-matched code block value (N) of the code block of the low priority TB CB,lp ) The data volume actually processed by the receiving end in the first transmission time can be enabled not to exceed the receiving capacity of the receiving end, and therefore processing capacity overflow and/or buffer overflow caused by receiving the low-priority TB under the condition that the receiving capacity of the receiving end is limited can be avoided.
Optionally, the method 400 further comprises:
and sending a notification message to the sending end, wherein the notification message is used for indicating that the size of the data received by the receiving end exceeds the receiving capability of the receiving end.
The scheme can reduce the data volume transmitted in the channel in time, so that the data volume actually transmitted in the channel does not exceed the processing capacity and/or the buffering capacity of a receiving end.
Optionally, the notification message further includes a suggested transmission rate, which is a data transmission rate matching the receiving capability of the receiving end.
The proposed transmission rate is a data transmission rate determined by the receiving end based on the receiving capability within the current first transmission time, and the sending end determines the code block size used in rate matching according to the proposed transmission rate, so that the data volume actually transmitted in the channel does not exceed the processing capability and/or the buffering capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or MAC layer signaling.
Next, referring to fig. 11, another method 1100 for rate de-matching provided in the embodiment of the present application is described, and the method includes S1110, S1120, and S1130.
S1110 is the same as S410 in the de-rate matching method 400 described above, S1130 is the same as S430 in the method 400, and the specific implementation manners of S410 and S430 are also applicable to S1110 and S1130, which are not described again.
S1120 is similar to S420 of method 400, except that, optionally, S1120 comprises:
determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N.
N CB,max For indicating the amount of buffered data, N, of the receiving end under different conditions CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the sending end will N ref N and N CB,max Minimum value among the three is used as code block size (N) for rate matching CB ) The data volume actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。N CB，max The calculation method of (2) can be referred to the calculation methods in other embodiments below. At this point, it may not be necessary to obtain N as described in method 400 ref 。
Besides, the specific implementation manner of S420 is also applicable to S1120, and is not described again.
Other steps that may be included in the method 400 in addition to S410, S420, and S430 and their specific implementation are also applicable to the method 1100, and furthermore, technical effects of the method 400 and explanations of the related terms may be applicable to the method 1100 and are not described in detail.
In the following, several embodiments of the rate buffering provided in the embodiments of the present application are given.
The first embodiment.
The transmitting end calculates the code block size used for rate matching in the following mannerN CB The receiving end calculates the code block size N used for de-rate matching in the following manner CB If not specifically stated, the carriers described in this embodiment all refer to carriers that transmit the first TB.
Step 1. TBS is calculated using the method described in section 5.4.2.1 of the communications Standard (3GPP TS 38.212V F.1.0) LBRM And N ref 。
Step 2, calculating the maximum value N of the size of a single code block which can be processed by the receiving end in the first transmission time according to the receiving capability of the receiving end in the current carrier (namely, the carrier i) and the first transmission time of the currently scheduled data CB,max 。
Step 3, calculating N CB ，N CB ＝min(N,N ref ,N CB,max )。
Where N is the code block size after encoding.
Wherein N is CB,max The calculation method of (c) is as follows:
-determining the maximum data rate of carrier i
Also referred to as the maximum transmission rate of carrier i or the peak rate of carrier i.
-determining a maximum value of the amount of data that can be processed by carrier i in the current first transmission time
-according to
Calculating N CB,max One of the calculation methods is
Presentation pair
And carrying out a down rounding operation.
Wherein one kind
The calculation method is as follows:
wherein the maximum data rate of the carrier i
The calculation method is as follows:
-R max 948/1024, ("/" denotes a division operation),
-
the maximum number of MIMO layers for CC i,
-
is the maximum modulation order of CC i,
-f (i) the value of the scaling factor of CC i may be 1 or 0.75 or other numbers smaller than 1 and larger than 0, and the value may be reported to the base station by the terminal as a parameter indicating the receiving capability of the terminal.
- μ is used to represent different subcarrier spacings, if SCS 15kHz, then μ 0; if SCS is 30kHz, then mu is 1; if SCS is 60kHz, then mu is 2; if SCS is 120kHz, then μ is 3.
-T s μ Is the average symbol length corresponding to different subcarrier intervals within 1 subframe (1ms), i.e.
-
Maximum bandwidth BW supported by the terminal in the given band or band combination (i) The maximum number of Resource Blocks (RBs) corresponding to the corresponding subcarrier spacing μ.
-OH (j) For the redundancy factor, it takes different values according to whether the current CC is uplink or downlink and the frequency band, e.g. OH (j) The values are as follows:
0.14, applicable to frequency range FR1 and downlink (for frequency range FR1 for DL);
0.18, applicable to frequency range FR2 and downlink (for frequency range FR2 for DL);
0.08, applicable to frequency range FR1 and uplink (for frequency range FR1 for UL);
0.10, applicable to frequency range FR2 and uplink (for frequency range FR2 for UL).
Wherein S is (i) The transmission time of the first transport block may be expressed in absolute time, for example, the actual transmission duration of the first transport block. Or may be represented by an equivalent transmission time of the first transport block, for example, one of the calculation methods is:
wherein:
-T slot for the slot length obtained according to the current scheduling parameters, T is, for example, if SCS is 15kHz slot 1 ms; if SCS is 30kHz, T slot 0.5 ms; if SCS is 60kHz, T slot 0.25 ms; if SCS is 120kHz, T slot 0.125 ms; if SCS is 240kHz, T slot ＝0.125ms。
-N RE The number of Resource Elements (REs) for a slot takes different values according to different design parameters. One example is, for SCS 15/30/60/120, N RE 156, for SCS 240, N RE ＝312。
-
For the number of RE's currently scheduled,
the transmitting end or the receiving end determines the number (N ') of REs allocated to one PRB' RE ) Wherein
Indicating that 12 subcarriers are included in the frequency domain within one PRB,
the number of symbols representing the physical channel carrying the current data, may be 1-14,
the number of REs included in a demodulation reference signal (DMRS) in one PRB in a scheduled time is represented, and a value may be 3 to 48 or other values according to a configuration parameter of the current scheduling.
Is a parameter representing overhead correlation, and takes one of {0,6,12,18 }. If the higher layer has not configured this parameter, then
The value is 0.
Wherein S is (i) One way of calculation is:
wherein:
-
the number of symbols representing the physical channel carrying the current data, may be 1-14,
is the number of symbols in a slot, and its value may be a fixed value such as 12,14,24,28, etc., determined according to the current frame format.
S (i) One way of calculating is:
wherein the content of the first and second substances,
-n PRB the value of (a) may be a fixed value, for example, fixed to the maximum PRB number supported by each Component Carrier (CC), for example, 273, or according to the frequency band and bandwidth in which the CC operates, the maximum PRB number in the PRB numbers corresponding to all sub-carrier spacing (SCS) in the maximum bandwidth of the current carrier is taken, and if the maximum bandwidth of one CC is 100MHz, the CC operates in a frequency band below 6GHz, referring to table 1, for the CC, n is a frequency band in which n is a carrier frequency band (e.g., a carrier frequency band) of the current carrier PRB 273. If the maximum bandwidth of the CC is 50MHz, then n of the CC PRB ＝270。
If the maximum bandwidth of a CC is 100MHz and operates in a frequency band above 6GHz, referring to Table 2, for the CC, n PRB ＝132。
TABLE 1
TABLE 2
-
The frequency domain PRB number for the current scheduling data, i.e., the first TB.
Wherein S is (i) One way of calculation is
Wherein the meaning of the individual parameters is as above.
Of which the other one is
The implementation mode of the method is as follows:
the maximum modulation order may be calculated according to the maximum multiple-input multiple-output (MIMO) layer number, the maximum modulation order, and the maximum code rate supported by the receiving end, and the subcarrier spacing is the minimum subcarrier spacing supported by the carrier i according to the maximum bandwidth of the carrier i as the maximum configuration BWP, and the method described in section 5.1.3.2 of the communication standard document (3GPP TS 38.214V f.1.0) calculates the maximum modulation order and the maximum code rate, and the method is used to calculate the maximum modulation order and the maximum code rate of the carrier i
The time slot length corresponding to the minimum subcarrier interval supported by the second transmission time carrier i, for example, if the subcarrier interval is 30kHz, the second transmission time length is 0.5 ms.
But also according to the maximum data rate of the receiving end carrier i
To obtain, for example
Wherein S is 2 (i) Is the second transmission time length.
The device type of the receiving end can also be obtained according to the device type of the receiving end, for example, if the device type of the receiving end is LTE UE Category 6, then
Bit, S 2 (i) 1 millisecond.
Example two.
The sending end calculates the code block size N used for rate matching in the following way CB The receiving end calculates the code block size N used for de-rate matching in the following manner CB If not specifically stated, the carriers described in this embodiment all refer to carriers that transmit the first TB.
Step 1, calculating the maximum value N of the size of a single code block which can be processed by a receiving end in first transmission time according to the receiving capacity of the receiving end in the current carrier (namely, carrier i) and the first transmission time of currently scheduled data CB,max 。
Step 2, calculating N CB ，N CB ＝min(N,N CB,max )。
Where N is the coded code block size, N CB,max The calculation method of (1) and N in the first embodiment CB,max The calculation method is the same and is not described again.
Example three.
The sending end calculates the code block size N used by the rate matching in the following way CB The receiving end calculates the code block size N used for de-rate matching in the following manner CB If not specifically stated, the carriers described in this embodiment all refer to carriers that transmit the first TB.
Step 1. TBS is calculated using the method described in section 5.4.2.1 of the communications Standard (3GPP TS 38.212V F.1.0) LBRM 。
Step 2, calculating N according to the receiving capability of the receiving end at the current carrier (namely, the carrier i) and the first transmission time of the currently scheduled data ref '，
Pair of representations
A down rounding operation is performed, wherein,
see example one for a calculation method of (c).
The other kind is
The implementation mode of the method is as follows:
the carrier bandwidth allocation table may be obtained by calculation according to the maximum multiple-input multiple-output (MIMO) layer number, the maximum modulation order, and the maximum code rate supported by the receiving end, and calculated according to the method described in section 5.1.3.2 of the communication standard document (3GPP TS 38.214V f.1.0) by using the maximum bandwidth of the carrier i as the maximum configuration BWP and the subcarrier interval as the minimum subcarrier interval supported by the carrier i, where the maximum bandwidth is the maximum bandwidth of the carrier i
The time slot length corresponding to the minimum subcarrier interval supported by the second transmission time carrier i, for example, if the subcarrier interval is 30kHz, the second transmission time length is 0.5 ms.
But also according to the maximum data rate of the receiving end carrier i
To obtain, for example
Wherein S is 2 (i) Is the second transmission time length.
The device type of the receiving end can also be obtained according to the device type of the receiving end, for example, if the device type of the receiving end is LTE UE Category 6, then
Bit, S 2 (i) 1 millisecond.
Step 3, calculating N CB ，N CB ＝min(N,N ref )。
Example four.
The first embodiment, the second embodiment and the third embodiment only consider the case of single carrier. If the receiving end supports multi-carrier, further according to the total maximum data rate of the receiving end and the scheduling duration of all the currently scheduled TBs, calculating N CB Taking the first embodiment as an example, for multiple carriers:
step 1. TBS is calculated using the method described in section 5.4.2.1 of the communications Standard (3GPP TS 38.212V F.1.0) LBRM And N ref 。
Step 2, according to the receiving capability of the receiving end on the current carrier (namely, the carrier i) and the first transmission time of the currently scheduled data, calculating the maximum value N of the size of a single code block which can be processed by the receiving end in the first transmission time and on the current carrier CB,max 。
One of the calculation methods is
Presentation pair
Doing a rounding-down operation, P max For the total maximum data rate that the receiving end can handle,
Wherein S is (i) The calculation method and the step S in the first embodiment (i) The calculation method is the same.
Step 3, calculating N CB ，N CB ＝min(N,N ref ,N CB,max )。
Where N is the coded code block size.
Example five.
In the first, second and third embodiments, only the case of a single carrier is considered. If the receiving end supports multi-carrier, further according to the total maximum data rate of the receiving end and the scheduling duration of all the currently scheduled TBs, calculating N CB Taking the first embodiment as an example, for multiple carriers:
step 1, calculating the maximum value N of the size of a single code block which can be processed by a receiving end in the first transmission time and on the current carrier according to the receiving capability of the receiving end in the current carrier (namely, the carrier i) and the first transmission time of the currently scheduled data CB,max 。
One of the calculation methods is
Pair of representations
Doing a rounding-down operation, P max For the total maximum data rate that the receiving end can handle,
Wherein S is (i) The calculation method and the step S in the first embodiment (i) The calculation method is the same.
Step 2, calculating N CB ，N CB ＝min(N,N CB,max )。
Where N is the code block size after encoding.
Example six.
Further, when a plurality of TBs are transmitted simultaneously, the transmitting end and the receiving end may also determine, according to different priorities of the TBs, the code block size used when the code blocks of different TBs are rate-matched, so as to ensure that a high-priority service (high-priority TB) can be transmitted at a lower code rate.
For example, for a high priority TB, it may be calculated as follows:
step 1. TBS is calculated using the method described in section 5.4.2.1 of the communications Standard (3GPP TS 38.212V F.1.0) LBRM And N ref 。
Step 2, calculating the maximum data quantity N which can be processed by the carrier i in the first transmission time of the current data according to the receiving capability of the receiving end and the first transmission time of the currently scheduled data CB,max . One of the calculation methods is
P max For the total maximum data rate that the receiving end can handle,
wherein S is (i) The calculation method and the embodiment I (i) The calculation method is the same. In the above-mentioned P max In the formula (2), j may take the value of i.
Step 3.N CB ＝min(N,N ref ,N CB,max )
Where N is the coded code block size.
Example seven.
Further, when a plurality of TBs are transmitted simultaneously, the transmitting end and the receiving end may also determine, according to different priorities of the TBs, the code block size used when the code blocks of different TBs are rate-matched, so as to ensure that a high-priority service (high-priority TB) can be transmitted at a lower code rate.
For example, for a high priority TB, it may be calculated as follows:
step 1, calculating the maximum data quantity N which can be processed by a carrier i in the first transmission time of the current data according to the receiving capability of a receiving end and the first transmission time of the currently scheduled data CB,max . One of the calculation methods is
P max For the total maximum data rate that the receiving end can handle,
wherein S is (i) Calculating method of (1) and embodiment one (i) The calculation method is the same. In the above-mentioned P max In the formula (2), j may take the value of i.
Step 2.N CB ＝min(N,N CB,max )
Where N is the code block size after encoding.
Example eight.
And for the low-priority service, the residual resources after the high-priority scheduling are utilized for transmission. Let code block size used by code block of high priority TB be N in rate matching CB,hp ，N CB,hp ＝N CB Code block number of high priority TB is C hp Then the resource left after the code block with high priority is P max ·S (i) /R LBRM -C hp ·N CB,hp Specifically, the method comprises the following steps:
step 1. TBS is calculated using the method described in section 5.4.2.1 of the communications Standard (3GPP TS 38.212V F.1.0) LBRM And N ref 。
Step 2, calculating the maximum data quantity N which can be processed by the transmission carrier within the first transmission time of the current data according to the receiving capability of the receiving end and the first transmission time of the currently scheduled data CB,max . One of the calculation methods is
Presentation pair
And carrying out a down rounding operation.
Step 3.N CB,lp ＝min(N,N ref ,N CB,max,lp )。
Where N is the code block size after encoding.
Example nine.
And for the low-priority service, the residual resources after the high-priority scheduling are utilized for transmission. Let code block size used by code block of high priority TB be N in rate matching CB,hp ，N CB,hp ＝N CB Code block number of high priority TB is C hp If the resource left after the code block with high priority is used is P max ·S (i) /R LBRM -C hp ·N CB,hp Specifically, the method comprises the following steps:
step 1, calculating the maximum data quantity N which can be processed by a transmission carrier within the first transmission time of the current data according to the receiving capability of a receiving end and the first transmission time of the currently scheduled data CB,max . One of the calculation methods is
Presentation pair
And carrying out a down rounding operation.
Step 2.N CB,lp ＝min(N,N CB,max,lp )。
In this application, the "carrier" may also be referred to as a "cell", and both are equivalent in this application.
Where N is the code block size after encoding.
The foregoing details an example of the method for rate matching and de-rate matching provided by the embodiments of the present application. It is to be understood that the transmitting end and the receiving end include hardware structures and/or software modules for performing the respective functions in order to implement the above functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
Fig. 5 is a schematic structural diagram of a rate matching apparatus provided in an embodiment of the present application, where the apparatus 500 includes:
a processing unit 510, configured to determine a receiving capability of a receiving end, where the receiving capability is used to indicate a maximum data throughput of the receiving end in a first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end in the first transmission time, where the first transmission time is used to transmit a first transport block to which a first code block belongs;
the processing unit 510 is further configured to: determining N from reception capability CB ，N CB The code block size used for rate matching;
the processing unit 510 is further configured to: according to N CB And performing rate matching on the first code block.
Optionally, the processing unit 510 is specifically configured to:
according to
And S (i) The reception capability of the receiving end is determined, wherein,
for the maximum data rate of carrier i, which is used for transmitting the first transport block, S (i) Is the duration of the first transmission time, the receiving capability and
is positively correlated, and the receiving capacity is related to S (i) And (4) positive correlation.
Optionally, the processing unit 510 is specifically configured to:
according to
And S (i) Determining a reception capability, wherein,
is the size of the largest transport block that can be transmitted by the carrier i in the second transmission time, S (i) For the duration of the first transmission time, the carrier i is used for transmitting the first transport block, the receiving capability and the
Positively correlated, and receive energyForce and S (i) And (4) positively correlating.
Optionally, the processing unit 510 is specifically further configured to:
determining N from reception capability CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with received capability;
according to N ref N and N CB,max Determining N CB Wherein N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N.
Optionally, the processing unit 510 is specifically further configured to:
according to U ( i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of all active BWPs of all active receive carriers at the receiving end.
Optionally, the processing unit 510 is specifically further configured to:
according to TBS LBRM And determining N 'from the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM Positively correlated with the minimum of the maximum data transfer quantities, the maximum data transfer quantity being
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) Is the duration of the first transmission time;
according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, the maximum data transmission amount is also equal to U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of all active BWPs for all active received carriers at the receiving end.
The apparatus 500 may further include other units, such as a receiving unit for receiving a notification message from the receiving end, the notification message indicating that the size of the data received by the receiving end exceeds the receiving capability of the receiving end; the transmitting unit is configured to reduce the size of data transmitted per unit time according to the communication message.
Optionally, the notification message further comprises a suggested transmission rate, which is a data transmission rate matching the receiving capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or MAC layer signaling.
It should be understood that the division of the units is only a functional division, and other division methods may be possible in practical implementation, for example, the transmitting unit and the receiving unit are located in a communication module.
Next, referring to fig. 12, another rate matching apparatus 1200 provided in the embodiment of the present application is described, which includes a processing unit 1210.
Wherein the processing unit 1210 is similar to the processing unit 510 in the rate matching apparatus 500 described above, except that optionally, the processing unit 1210 is further configured to:
determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N.
N CB,max For indicating the amount of buffered data, N, of the receiving end under different conditions CB,max Based on the value obtained from the receiving capability of the receiving end within the first transmission time (the receiving capability of the receiving end may be limited within the first transmission time), the sending end will N ref N and N CB,max Minimum value among the three is used as code block size (N) for rate matching CB ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving end has limited receiving capability during the first transmission time and the first transmission block is too large, N is greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。N CB，max The calculation method of (2) can refer to the calculation methods in other embodiments below. At this time, it may not be necessary to obtain N as described in apparatus 500 ref 。
In addition, the specific implementation manner of the processing unit 510 is also applicable to the processing unit 1210, and is not described in detail.
Other units that may be included in the apparatus 500 besides the processing unit 510 and their specific implementations are also applicable to the apparatus 1200, and furthermore, the technical effects of the apparatus 500 and the explanations of the related terms are applicable to the apparatus 1200 and will not be described in detail.
Fig. 6 is a schematic structural diagram of a de-rate matching apparatus provided in an embodiment of the present application, where the apparatus 600 includes: a processing unit 610 for, among other things,
the processing unit 610 is configured to determine a receiving capability of the receiving end, where the receiving capability is used to indicate a maximum data throughput of the receiving end in the first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end in the first transmission time, where the first transmission time is used to receive a first transport block to which a first code block belongs;
the processing unit 610 is further configured to: determining N from reception capability CB ，N CB The size of a code block used for rate de-matching;
the processing unit 610 is further configured to: according to N CB For the first code blockAnd performing rate de-matching.
Optionally, the processing unit 610 is specifically configured to:
according to
And S (i) The reception capability of the receiving end is determined, wherein,
for the maximum data rate of carrier i, which is used for transmitting the first transport block, S (i) Is the duration of the first transmission time, the receiving capability and
is positively correlated, and the receiving capacity is related to S (i) And (4) positively correlating.
Optionally, the processing unit 610 is specifically configured to:
according to
And S (i) The reception capability is determined, wherein,
is the size of the largest transport block that can be transmitted by the carrier i in the second transmission time, S (i) For the duration of the first transmission time, the carrier i is used for transmitting the first transport block, the receiving capability and the
Positively correlated, and receiving capability is related to S (i) And (4) positively correlating.
Optionally, the processing unit 610 is specifically further configured to:
determining N from reception capability CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with received capability;
according to N ref N and N CB,max Determining N CB Wherein N is ref Is the first reference code block size, N is the size of the first code block, N CB Is N CB,max 、N ref And the one with the smallest value in N.
Optionally, the processing unit 610 is further specifically configured to:
according to U (i) And receiving capability determination N CB,max Wherein N is CB,max And also with U (i) Positive correlation, U (i) The carrier i is used for transmitting the first transport block as a ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of all active BWPs of all active receive carriers at the receiving end.
Optionally, the processing unit 610 is further specifically configured to:
according to TBS LBRM And determining N 'from the maximum data transmission quantity of the carrier i in the first transmission time' ref Wherein, TBS LBRM Carrier i is used to transmit the first transport block, N ', for a reference transport block size' ref Is a second reference code block size, N' ref And TBS LBRM Positively correlated with the minimum of the maximum data transfer quantities, the maximum data transfer quantity being
And S (i) The correlation is positive and the correlation is negative,
maximum data rate, S, for carrier i (i) Is the duration of the first transmission time;
according to N and N' ref Determining N CB Where N is the size of the first code block, N CB Is N' ref And the one with the smaller value in N.
Optionally, the maximum data transmission amount is also equal to U (i) Positive correlation, U (i) The ratio of the transmission bandwidth value of the active BWP for carrier i to the sum of the transmission bandwidth values of all active BWPs for all active received carriers at the receiving end.
The apparatus 600 may further include other units, for example, a sending unit, configured to send a notification message to the sending end, where the notification message is used to indicate that the size of the data received by the receiving end exceeds the receiving capability of the receiving end.
Optionally, the notification message further includes a suggested transmission rate, which is a data transmission rate matching with the receiving capability of the receiving end.
Optionally, the notification message is physical layer signaling or higher layer signaling or MAC layer signaling.
It should be understood that the above division of the units is only a functional division, and other division methods may be possible in actual implementation.
It can be clearly understood by those skilled in the art that the detailed working process of the above-described apparatuses and units and the technical effects generated by the execution steps can refer to the description in the foregoing corresponding method embodiments, and are not repeated herein for brevity.
The rate matching device and the de-rate matching device may be a chip, and the processing unit may be implemented by hardware or software, and when implemented by hardware, the processing unit may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processing unit may be a general-purpose processor implemented by reading software code stored in a memory unit, which may be integrated in the processor or located external to the processor, separately.
Next, referring to fig. 13, another apparatus 1300 for de-rate matching provided in the embodiment of the present application is described, which includes a processing unit 1310.
Wherein the processing unit 1310 is similar to the processing unit 610 in the de-rate matching device 600 described above, except that optionally the processing unit 1310 is further configured to:
determining N according to receiving capability of receiving end CB,max ，N CB,max Is the maximum value, N, of the size of a single code block that the receiving end can process within the first transmission time CB,max Positively correlated with the receiving capability of the receiving end; according to N and N CB,max Determining N CB Where N is the size of the first code block, N CB Is N CB,max And the one with the smaller value in N。
N CB,max For indicating the amount of buffer data, N, of the receiving end under different conditions CB,max Based on the value obtained from the receiving capability of the receiving end during the first transmission time (the receiving capability of the receiving end may be limited during the first transmission time), the sending end will send N ref N and N CB,max Minimum value among the three is used as code block size (N) for rate matching CB ) The data amount actually transmitted in the channel can be enabled not to exceed the processing capacity and/or the buffering capacity of the receiving end, so that the processing capacity overflow and/or the buffering overflow can be avoided under the condition that the receiving capacity of the receiving end is limited. For example, if the receiving capability of the receiving end is limited during the first transmission time and the first transmission block is too large, N is greater than N CB,max The sending end can send N CB,max Code block size (N) used for rate matching CB )。N CB，max The calculation method of (2) can refer to the calculation methods in other embodiments below. At this point, it may not be necessary to obtain N as described in apparatus 600 ref 。
In addition, the specific implementation manner of the processing unit 610 is also applicable to the processing unit 1310, and is not described in detail.
Other units that may be included in the apparatus 600 besides the processing unit 610 and its specific implementation are also applicable to the apparatus 1300, and moreover, technical effects of the apparatus 600 and explanations of related terms may also be applicable to the apparatus 1300 and are not described in detail.
The transmitting end and the receiving end provided in the embodiments of the present application are further described below by taking the transmitting end as an access network device and the receiving end as a terminal device.
Fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be adapted to the communication system shown in fig. 1, and performs the functions of the receiving end in the above method embodiments. For convenience of explanation, fig. 7 shows only main components of the terminal device. As shown in fig. 7, the terminal device 70 includes a processor, a memory, a control circuit, an antenna, and an input-output means. The processor is mainly used for processing communication protocols and communication data and for the whole terminal equipmentFor example, for supporting the terminal device to perform the actions described in the above-mentioned method embodiments, e.g. determining the receiving capability of the receiving end, determining N according to the receiving capability CB According to N CB Rate matching the first code block, etc. The memory is mainly used for storing software programs and data, such as the first transport block and the first code block described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are primarily intended for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.
When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.
Those skilled in the art will appreciate that fig. 7 shows only one memory and one processor for ease of illustration. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, and the present application is not limited thereto.
As an alternative implementation manner, the processor may include a baseband processor and/or a central processing unit, where the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor of fig. 7 may integrate the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
In the embodiment of the present application, the antenna and the control circuit having transceiving functions can be regarded as a transceiving unit 701 of the terminal device 70, for example, for supporting the terminal device to perform the receiving function and the transmitting function as described in the method 400. The processor having the processing function is regarded as the processing unit 702 of the terminal device 70. As shown in fig. 7, the terminal device 70 includes a transceiving unit 701 and a processing unit 702. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 701 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 701 may be regarded as a transmitting unit, that is, the transceiving unit 701 includes a receiving unit and a transmitting unit, the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitting circuit, and the like. Illustratively, the transceiving unit 701 may not include an antenna, but only include a circuit portion, such that the antenna is external to the transceiving unit.
The processor 702 is configured to execute the instructions stored in the memory, so as to control the transceiver unit 701 to receive and/or transmit signals, thereby implementing the functions of the terminal device in the above method embodiments. As an implementation manner, the function of the transceiving unit 701 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. When performing transceiving of various types of signals, if the first code block is received, the processor 702 controls the transceiving unit 701 to implement the receiving. Therefore, the processor 702 is a signal transceiving determiner and initiates data transceiving operation, and the transceiving unit 701 is a signal transceiving executor.
Fig. 8 is a schematic structural diagram of an access network device according to an embodiment of the present application, where the access network device may be, for example, a base station. As shown in fig. 8, the base station may be applied to the communication system shown in fig. 1, and performs the functions of the transmitting end in the above method embodiments. The base station 80 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 801 and one or more baseband units (BBUs) (which may also be referred to as Digital Units (DUs)) 802. The RRU 801 may be referred to as a transceiver unit, transceiver, transceiving circuit, transceiver, or the like, and may include at least one antenna 8011 and a radio frequency unit 8012. The RRU 801 is mainly used for transceiving radio frequency signals and converting radio frequency signals into baseband signals, for example, for sending the first code block in the above method embodiment. The BBU 802 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 801 and the BBU 802 may be physically disposed together or may be physically disposed separately, that is, distributed base stations.
The BBU 802 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 802 may be configured to control the base station to perform the operation procedure related to the network device in the above-described method embodiment.
In an embodiment, the BBU 802 may be formed by one or more boards, and the boards may jointly support a radio access network with a single access indication (e.g., a Long Term Evolution (LTE) network), or may respectively support radio access networks with different access schemes (e.g., an LTE network, a 5G network, or other networks). The BBU 802 further includes a memory 8021 and a processor 8022, the memory 8021 being used to store necessary instructions and data. For example, the memory 8021 stores the first code block in the above-described method embodiment. The processor 8022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation flow related to the network device in the above method embodiment. The memory 8021 and processor 8022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.
Fig. 9 shows a schematic structural diagram of a communication device 900. The apparatus 900 may be configured to perform the steps of the method described in the above method embodiments, which may be referred to as descriptions in the above method embodiments. The communication apparatus 900 may be a chip, an access network device (e.g., a base station), a terminal device or other communication device, etc.
The communication device 900 includes one or more processors 901. The processor 901 may be a general-purpose processor or a special-purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip), execute a software program, and process data of the software program. The communication device may include a transceiving unit to enable input (reception) and output (transmission) of signals. For example, the communication device may be a chip, and the transceiving unit may be an input and/or output circuit of the chip, or a communication interface. The chip can be used for a terminal or a base station or other communication equipment. As another example, the communication device may be a terminal or a base station or other communication equipment, and the transceiver unit may be a transceiver, a radio frequency chip, or the like.
The communication apparatus 900 includes one or more processors 901, and the one or more processors 901 may implement the functions of the executing device of the method in the embodiment shown in fig. 3 and/or fig. 4.
In one possible design, the communications apparatus 900 includes means for rate matching a first code block and means for transmitting the first code block. The functions of the rate matching component for the first code block may be implemented by one or more processors and transmitted through a transceiver, or an input/output circuit, or an interface of a chip. The method for rate matching the first code block may be referred to in the related description of the above method embodiments.
In another possible design, the communications apparatus 900 includes means for de-rate matching the first code block, and means for receiving the first code block. The functions of the means for de-rate matching the first code block may be implemented by one or more processors and the first code block is received by a transceiver, or an input/output circuit, or an interface of a chip. The method for performing de-rate matching on the first code block may be referred to the related description in the above method embodiment.
Alternatively, the processor 901 may also implement other functions in addition to the functions of the embodiments shown in fig. 3 and/or fig. 4.
Alternatively, in one design, the processor 901 may execute instructions to cause the communication device 900 to perform the steps described in the above method embodiments. The instructions may be stored in whole or in part within the processor, such as instructions 903, or in whole or in part in a memory 902 coupled to the processor, such as instructions 904, or together with instructions 903 and 904 may cause the communications apparatus 900 to perform the steps described in the above method embodiments.
In yet another possible design, the communication apparatus 900 may also include a circuit, which may implement the functions of the network device or the terminal device in the foregoing method embodiments.
In yet another possible design, the communication device 900 may include one or more memories 902 having instructions 904 stored thereon, which are executable on the processor to cause the communication device 900 to perform the methods described in the above method embodiments. Optionally, the memory may further store data therein. Optionally, instructions and/or data may also be stored in the processor. For example, the one or more memories 902 may store the corresponding relations described in the above embodiments, or the related parameters or tables referred to in the above embodiments, and the like. The processor and the memory may be provided separately or may be integrated together.
In yet another possible design, the communications apparatus 900 may further include a transceiver 905 and an antenna 906. The processor 901 may also be referred to as a processing unit and controls a communication device (terminal or base station). The transceiver 905 may be called a transceiver, a transceiver circuit, or a transceiver, etc. and is used for implementing the transceiving function of the communication device through the antenna 906.
The present application also provides a communication system comprising one or more access network devices as described above, and one or more terminal devices.
It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The present application also provides a computer-readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.
The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
It should also be understood that, in the present application, "when …", "if" and "if" all refer to the fact that the UE or the base station will perform the corresponding processing under certain objective conditions, and are not limited time, and do not require the UE or the base station to perform certain judgment actions, nor do they mean that there are other limitations.
Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Take this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually use magnetism to reproduce data, while discs use lasers to reproduce data. Combinations of the above should also be included within the scope of computer-readable media.
In short, the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (38)
1. A method of rate matching, comprising:
determining receiving capability of a receiving end, wherein the receiving capability is used for indicating maximum data processing capacity of the receiving end in a first transmission time, and/or the receiving capability is used for indicating maximum data buffer capacity of the receiving end in the first transmission time, and the first transmission time is used for transmitting a first transmission block to which a first code block belongs; the receiving capability is according to
And S (i) Is determined, wherein
For the size of the largest transport block that can be transmitted by the carrier i in the second transmission time, S (i) The carrier i is used for transmitting the first transport block, the receiving capability and the time length of the first transmission time
Positive correlation, the receiving capability and the S (i) Positive correlation;
determining N from the receiving capability CB Said N is CB The code block size used for rate matching;
according to said N CB Rate matching the first code block.
2. The method of claim 1, wherein the determining N is based on the receiving capability CB The method comprises the following steps:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N ref N and N CB,max Determining the N CB Wherein, the N is ref Is a first reference code block size, N is the size of the first code block, N is CB Is said N CB,max The N ref And the one with the smallest value among said N.
3. Method according to claim 1 or 2, wherein said determining N is based on said reception capability CB The method comprises the following steps:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N and said N CB,max Determining the N CB Wherein N is the size of the first code block, N CB Is said N CB,max And the one with the smaller of the values in N.
4. Method according to claim 2 or 3, characterized in that said receiving is performed according to said reception energyForce determination N CB,max The method comprises the following steps:
according to U (i) And said receiving capability determines said N CB,max Wherein, the N is CB,max And also with said U (i) Positive correlation, the U (i) The carrier i is used for transmitting the first transport block, and is a ratio of a transmission bandwidth value of an active partial bandwidth BWP of the carrier i to a sum of transmission bandwidth values of active BWPs of all active receiving carriers at the receiving end.
5. The method of claim 1, wherein said determining N is based on said reception capability CB The method comprises the following steps:
according to TBS LBRM And determining N 'by the maximum data processing amount of the carrier i in the first transmission time' ref Wherein, TBS LBRM For a reference transport block size, the carrier i is used for transmitting the first transport block, N' ref Is a second reference code block size, the N' ref And said TBS LBRM And the minimum of the maximum data throughput is positively correlated with
And S (i) Positive correlation, the
Is the maximum data rate of the carrier i, S (i) Is the duration of the first transmission time;
according to N and the N' ref Determining N CB Wherein N is the size of the first code block, N CB Is the N' ref And the one with the smaller of the values in N.
6. The method of claim 5, wherein the maximum data throughput is further associated with U (i) Positive correlation, the U (i) A transmission bandwidth value of active BWP for the carrier i and all active receiving carriers at the receiving endOf the transmission bandwidth value of the active BWP.
7. The method of any of claims 1-6, wherein the first transport block is a high priority transport block, wherein the first transport block comprises C code blocks, wherein C is a positive integer, and wherein each code block of the C code blocks has a size of N before rate matching CB ；
The method further comprises the following steps:
according to C and N CB Determining the cache data volume or the processing data volume occupied by the high-priority transmission block, wherein the cache data volume occupied by the high-priority transmission block is N CB ·C；
Determining the residual cache data volume according to the maximum data cache volume of the carrier i in the first transmission time and the cache data volume occupied by the high-priority transmission block, wherein the residual cache data volume is equal to the maximum data cache volume minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data;
determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block in rate matching, wherein N is CB,lp Is N lp 、N ref And N CB,max,lp Minimum of (1), the N lp For each code block size of the low priority transport block, N ref Is the first reference code block size, the N CB,max,lp The maximum value of the data quantity of the code blocks which can be transmitted by the carrier i and are used for carrying out rate matching is determined based on the residual cache data quantity;
according to N CB,lp And carrying out rate matching on the code blocks of the low-priority transmission blocks.
8. The method according to any one of claims 1-7, further comprising:
receiving a notification message from the receiving end, wherein the notification message is used for indicating that the size of the data received by the receiving end exceeds the receiving capability of the receiving end;
and reducing the size of the data transmitted in unit time according to the notification message.
9. The method of claim 8, wherein the notification message further comprises a suggested transmission rate, and wherein the suggested transmission rate is a data transmission rate that matches the receiving capability of the receiving end.
10. A method of de-rate matching, comprising:
determining the receiving capability of a receiving end, wherein the receiving capability is used for indicating the maximum data processing amount of the receiving end in a first transmission time, and/or the receiving capability is used for indicating the maximum data buffer amount of the receiving end in the first transmission time, and the first transmission time is used for receiving a first transmission block; the receiving capability is according to
And S (i) Is determined, wherein
For the size of the largest transmission block that can be transmitted by the carrier i in the second transmission time, S (i) The carrier i is used for transmitting the first transport block, the receiving capability and the time length of the first transmission time
Positive correlation, the receiving capability and the S (i) Positive correlation;
determining N from the receiving capability CB Said N is CB The size of a code block used for rate de-matching;
according to said N CB And performing rate de-matching on the first transmission block.
11. The method of claim 10, wherein the determining N is based on the receiving capability CB The method comprises the following steps:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N ref N and N CB,max Determining the N CB Wherein, the N is ref Is a first reference code block size, N is the size of the first code block, N is CB Is said N CB,max The N ref And the one with the smallest value among said N.
12. Method according to claim 10 or 11, wherein said determining N is based on said reception capability CB The method comprises the following steps:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N and said N CB,max Determining the N CB Wherein N is the size of the first code block, N CB Is said N CB,max And the one with the smaller of the values in N.
13. Method according to claim 11 or 12, wherein said determining N is based on said reception capability CB,max The method comprises the following steps:
according to U (i) And said receiving capability determines said N CB,max Wherein, the N is CB,max And also with said U (i) Positive correlation, the U (i) The carrier i is used for transmitting the first transport block, and is a ratio of a transmission bandwidth value of an active partial bandwidth BWP of the carrier i to a sum of transmission bandwidth values of active BWPs of all active receiving carriers at the receiving end.
14. The method of claim 10, wherein the determining N is based on the receiving capability CB The method comprises the following steps:
according to TBS LBRM And determining N 'by the maximum data processing amount of the carrier i in the first transmission time' ref Wherein TBS LBRM For a reference transport block size, the carrier i is used for transmitting the first transport block, N' ref Is a second reference code block size, the N' ref And said TBS LBRM And the minimum of the maximum data throughput is positively correlated with
And S (i) Positive correlation, the
Is the maximum data rate of the carrier i, S (i) Is the duration of the first transmission time;
according to N and the N' ref Determining N CB Wherein N is the size of the first code block, and N is CB Is the N' ref And the one with the smaller of the values in N.
15. The method of claim 14, wherein the maximum data throughput is further associated with U (i) Positive correlation, the U (i) Is the ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of the active BWPs of all active receiving carriers at the receiving end.
16. The method of any of claims 10-15, wherein the first transport block is a high priority transport block, wherein the first transport block comprises C code blocks, wherein C is a positive integer, and wherein each code block of the C code blocks has a size of N before rate matching CB ；
The method further comprises the following steps:
according to C and N CB Determining the cache data volume or the processing data volume occupied by the high-priority transmission block, wherein the cache data volume occupied by the high-priority transmission block is N CB ·C；
Determining the residual cache data volume according to the maximum data cache volume of the carrier i in the first transmission time and the cache data volume occupied by the high-priority transmission block, wherein the residual cache data volume is equal to the maximum data cache volume minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data;
determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block in rate matching, wherein N is CB,lp Is N lp 、N ref And N CB,max,lp Minimum of (1), the N lp For each code block size of the low priority transport block, N ref Is the first reference code block size, the N CB,max,lp The maximum value of the data quantity of the code blocks which can be transmitted by the carrier i and are used for carrying out rate matching is determined based on the residual cache data quantity;
according to N CB,lp And carrying out rate matching on the code blocks of the low-priority transmission blocks.
17. The method according to any one of claims 10-16, further comprising:
receiving a notification message from the receiving end, wherein the notification message is used for indicating that the size of the data received by the receiving end exceeds the receiving capability of the receiving end;
and reducing the size of the data transmitted in the unit time according to the notification message.
18. The method of claim 17, wherein the notification message further comprises a suggested transmission rate, and wherein the suggested transmission rate is a data transmission rate that matches the receiving capability of the receiving end.
19. A rate matching apparatus, comprising:
a processing unit, configured to determine a receiving capability of a receiving end, where the receiving capability is used to indicate a maximum data processing amount of the receiving end in a first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end in the first transmission time, where the first transmission time is used to transmit a first transport block to which a first code block belongs; the receiving capability is according to
And S (i) Is determined, wherein
For the size of the largest transmission block that can be transmitted by the carrier i in the second transmission time, S (i) The carrier i is used for transmitting the first transport block, the receiving capability and the time length of the first transmission time
Positive correlation, the receiving capability and the S (i) Positive correlation;
the processing unit is further configured to determine N according to the receiving capability CB Said N is CB The code block size used for rate matching;
the processing unit is further used for obtaining the N CB Rate matching the first code block.
20. The apparatus as claimed in claim 19, wherein the processing unit determines N according to the receiving capability CB The method is specifically used for:
determining N from the receiving capability CB,max Said N is CB,max For the receiver to be able to process during the first transmission timeMaximum value of the size of a single code block, N CB,max Positively correlated with the receiving capability;
according to N ref N and N CB,max Determining the N CB Wherein, the N is ref Is a first reference code block size, N is the size of the first code block, N is CB Is said N CB,max The N ref And the one with the smallest value among said N.
21. The apparatus according to claim 19 or 20, wherein the processing unit is configured to determine N based on the receiving capability CB The method is specifically used for:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N and said N CB,max Determining the N CB Wherein N is the size of the first code block, N CB Is said N CB,max And the one with the smaller of the values in N.
22. The apparatus according to claim 20 or 21, wherein the processing unit is configured to determine N according to the receiving capability CB,max The method is specifically used for:
according to U (i) And said receiving capability determines said N CB,max Wherein, the N is CB,max And also with said U (i) Positive correlation, the U (i) The carrier i is used for transmitting the first transport block, and is a ratio of a transmission bandwidth value of an active partial bandwidth BWP of the carrier i to a sum of transmission bandwidth values of active BWPs of all active receiving carriers at the receiving end.
23. The apparatus as claimed in claim 19, wherein the processing unit determines N according to the receiving capability CB The method is specifically used for:
according to TBS LBRM And determining N 'by the maximum data processing amount of the carrier i in the first transmission time' ref Wherein, TBS LBRM For a reference transport block size, the carrier i is used for transmitting the first transport block, N' ref Is a second reference code block size, the N' ref And said TBS LBRM And the minimum of the maximum data throughput is positively correlated with
And S (i) Positive correlation, the
Is the maximum data rate of the carrier i, S (i) Is the duration of the first transmission time;
according to N and the N' ref Determining N CB Wherein N is the size of the first code block, N CB Is the N' ref And the one with the smaller of the values in N.
24. The apparatus of claim 23, wherein the maximum data throughput is further associated with U (i) Positive correlation, the U (i) Is the ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of the active BWPs of all active receiving carriers at the receiving end.
25. The apparatus of any of claims 19-24, wherein the first transport block is a high priority transport block, wherein the first transport block comprises C code blocks, wherein C is a positive integer, and wherein each code block of the C code blocks has a size N before rate matching CB ；
The processing unit is further configured to:
according to C and N CB Determining the amount of cache data or processing data occupied by the high-priority transmission block, wherein the amount of cache data occupied by the high-priority transmission block is N CB ·C；
Determining the residual cache data volume according to the maximum data cache volume of the carrier i in the first transmission time and the cache data volume occupied by the high-priority transmission block, wherein the residual cache data volume is equal to the maximum data cache volume minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data;
determining N according to the residual cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block in rate matching, wherein N is CB,lp Is N lp 、N ref And N CB,max,lp Minimum of (1), the N lp For each code block size of the low priority transport block, N ref Is the first reference code block size, the N CB,max,lp The maximum value of the data quantity of the code blocks which can be transmitted by the carrier i and are used for carrying out rate matching is determined based on the residual cache data quantity;
according to N CB,lp And carrying out rate matching on the code blocks of the low-priority transmission blocks.
26. The apparatus according to any of claims 19-25, wherein the apparatus further comprises a transceiver unit;
the receiving and sending unit is configured to receive a notification message from the receiving end, where the notification message is used to indicate that the size of the data received by the receiving end exceeds the receiving capability of the receiving end;
the processing unit is further configured to reduce the size of the data sent in the unit time according to the notification message.
27. The apparatus of claim 26, wherein the notification message further comprises a suggested transmission rate, and wherein the suggested transmission rate is a data transmission rate that matches the receiving capability of the receiving end.
28. A de-rate matching apparatus, comprising:
a processing unit, configured to determine a receiving capability of a receiving end, where the receiving capability is used to indicate a maximum data processing amount of the receiving end within a first transmission time, and/or the receiving capability is used to indicate a maximum data buffer amount of the receiving end within the first transmission time, and the first transmission time is used to receive a first transport block; the receiving capability is according to
And S (i) Is determined, wherein
For the size of the largest transmission block that can be transmitted by the carrier i in the second transmission time, S (i) The carrier i is used for transmitting the first transport block, the receiving capability and the time length of the first transmission time
Positive correlation, the receiving capability and the S (i) Positive correlation;
the processing unit is further configured to determine N according to the receiving capability CB Said N is CB The size of a code block used for rate de-matching;
the processing unit is further used for obtaining the N CB And performing rate de-matching on the first transmission block.
29. The apparatus as claimed in claim 28, wherein the processing unit determines N according to the receiving capability CB The method is specifically used for:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N ref N and N areN is CB,max Determining the N CB Wherein, the N is ref Is a first reference code block size, N is the size of the first code block, N is CB Is said N CB,max The N ref And the one with the smallest value among said N.
30. The apparatus according to claim 28 or 29, wherein the processing unit is configured to determine N according to the receiving capability CB The method is specifically used for:
determining N from the receiving capability CB,max Said N is CB,max The maximum value of the size of a single code block that can be processed by the receiving end in the first transmission time is N CB,max Positively correlated with the receiving capability;
according to N and said N CB,max Determining the N CB Wherein N is the size of the first code block, N CB Is said N CB,max And the one with the smaller of the values in N.
31. The apparatus according to claim 29 or 30, wherein the processing unit is configured to determine N according to the receiving capability CB,max The method is specifically used for:
according to U (i) And said receiving capability determines said N CB,max Wherein, the N is CB,max And also with said U (i) Positive correlation, the U (i) The carrier i is used for transmitting the first transport block, and is a ratio of a transmission bandwidth value of an active partial bandwidth BWP of the carrier i to a sum of transmission bandwidth values of active BWPs of all active receiving carriers at the receiving end.
32. The apparatus as claimed in claim 28, wherein the processing unit determines N according to the receiving capability CB In particular, it is used for:
according to TBS LBRM And determining N 'by the maximum data processing amount of the carrier i in the first transmission time' ref Wherein, TBS LBRM For referenceA transport block size, the carrier i being used to transport the first transport block, N' ref Is a second reference code block size, the N' ref And said TBS LBRM And the minimum of the maximum data throughput is positively correlated with
And S (i) Positive correlation, the
Is the maximum data rate of the carrier i, S (i) Is the duration of the first transmission time;
according to N and the N' ref Determining N CB Wherein N is the size of the first code block, and N is CB Is the N' ref And the one with the smaller of the values in N.
33. The apparatus of claim 32, wherein the maximum data throughput is further associated with U (i) Positive correlation, the U (i) Is the ratio of the transmission bandwidth value of the active BWP of the carrier i to the sum of the transmission bandwidth values of the active BWPs of all active receiving carriers at the receiving end.
34. The apparatus of any of claims 28-33, wherein the first transport block is a high priority transport block, wherein the first transport block comprises C code blocks, wherein C is a positive integer, and wherein each code block of the C code blocks has a size of N before rate matching CB ；
The processing unit is also used for processing the data according to C and N CB Determining the amount of cache data or processing data occupied by the high-priority transmission block, wherein the amount of cache data occupied by the high-priority transmission block is N CB ·C；
The processing unit is further configured to buffer data occupied by the high-priority transmission block according to a maximum data buffer amount of the carrier i in the first transmission timeDetermining the residual cache data amount which is equal to the maximum data cache amount minus N CB C, the carrier i is used for transmitting the first transmission block, and the residual buffer data amount is used for buffering low-priority data;
the processing unit is further configured to determine N according to the remaining cache data amount CB,lp ，N CB,lp Size of code block for low priority transport block in rate matching, wherein N is CB,lp Is N lp 、N ref And N CB,max,lp Minimum of (1), the N lp For each code block size of the low priority transport block, N ref Is the first reference code block size, the N CB,max,lp A maximum value of the data amount of the code blocks for rate matching, which is determined based on the remaining buffered data amount and which can be transmitted by the carrier i;
the processing unit is also used for processing the data according to N CB,lp And carrying out rate matching on the code blocks of the low-priority transmission blocks.
35. The apparatus according to any of claims 28-34, wherein the apparatus further comprises a transceiver unit;
the receiving and sending unit is configured to receive a notification message from the receiving end, where the notification message is used to indicate that the size of the data received by the receiving end exceeds the receiving capability of the receiving end;
the processing unit is further configured to reduce the size of the data sent in the unit time according to the notification message.
36. The apparatus of claim 35, wherein the notification message further comprises a suggested transmission rate, and wherein the suggested transmission rate is a data transmission rate that matches the receiving capability of the receiving end.
37. A computer-readable storage medium, characterized in that it stores a computer program which causes a communication device to execute the method of any one of claims 1 to 18.
38. A communications apparatus, comprising a processor and a storage medium storing instructions that, when executed by the processor, cause the processor to perform the method of any one of claims 1 to 18.
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| CN201810351167.0A CN110391870B (en) | 2018-04-16 | 2018-04-18 | Method and device for rate matching, and method and device for rate de-matching |
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