CN111294948A

CN111294948A - Decoding method and device, storage medium, terminal and base station

Info

Publication number: CN111294948A
Application number: CN201910537316.7A
Authority: CN
Inventors: 王琤; 张凯; 周化雨; 杨殷
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-06-16

Abstract

A decoding method and device, storage medium, terminal and base station are provided, the method comprises: receiving TBS indication information; searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value; decoding the received PDSCH according to the TBS value; wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUCorresponding TBS value. The scheme of the invention can realize the reduction of code rate, the acquisition of frequency diversity and coding gain, the improvement of reliability and the reduction of time delay.

Description

Decoding method and device, storage medium, terminal and base station

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a decoding method and apparatus, a storage medium, a terminal, and a base station.

Background

In the prior art, to implement decoding, a base station needs to enable a terminal (User Equipment, UE) to determine a transport block Size (TBs) value, and further decode a received Physical Downlink Shared Channel (PDSCH) according to the TBs value. Wherein, the TBS value can be obtained by looking up the PDSCH channel TBS table.

However, when decoding is performed based on the TBS value found in the existing PDSCH channel TBS table, the code rate (CodingRate) is often too high, which leads to a decrease in reliability, and especially in an environment with a low SNR, decoding is likely to fail. The prior art typically employs time domain repetition to improve reliability, but this results in high latency.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a decoding method and apparatus, a storage medium, a terminal, and a base station, which can reduce a code rate, obtain frequency diversity and coding gain, improve reliability, and reduce a time delay.

To solve the above technical problem, an embodiment of the present invention provides a decoding method, including the following steps: receiving TBS indication information, wherein the TBS indication information at least comprises: i is_MCSCarrier number and frame number; determining a PDSCH channel TBS table; searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used for indicating { I_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number; decoding the received PDSCH according to the TBS value; wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

Optionally, in the PDSCH channel TBS table, at each I_TBSEach N of the corresponding plurality of TBS values_RUGroup according to N_RUContaining one or more N in descending order_RUSubgroups, N within each subgroup_RUThe corresponding TBS values are the same, and the TBS value of the previous sub-group is smaller than that of the next sub-group.

Optionally, there are a plurality of PDSCH channel TBS tables, where the TBS indication information further includes an indicator of the TBS table, and the indicator of the TBS table is used to indicate the PDSCH channel TBS table; determining the PDSCH channel TBS table comprises: and determining the PDSCH channel TBS table according to the indicator of the TBS table.

Optionally, I_TBSA plurality of tables, said I_TBSTable for indicating said I_MCSAnd I_TBSThe TBS indication information further includes I_TBSIndicator of a table, said I_TBSThe indicator of the table is used for indicating the I_TBSTable; searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value comprises: according to the formula I_TBSIndicator of table, determining the PDSCH channel I_TBSTable; based on the I_MCSLooking up the I_TBSTable to determine said I_TBS(ii) a Based on the I_TBSLook up the PDSCH channel TBS table to determine the TBS value.

Optionally, the receiving the TBS indication information includes: receiving and decoding a PDCCH to obtain DCI; wherein at least a portion of the TBS indication information is included in the DCI.

Optionally, the receiving the TBS indication information includes: receiving a high-level signaling, wherein the high-level signaling comprises UE (user equipment) special physical channel configuration information; wherein at least a portion of the TBS indication information is included in the UE-specific physical channel configuration information.

Optionally, I in the PDSCH channel TBS table_TBSA portion of the corresponding TBS value is disabled.

Optionally, { I ] in the PDSCH channel TBS table_TBS，N_RUA portion of the corresponding TBS values are disabled.

To solve the above technical problem, an embodiment of the present invention provides a decoding method, including the following steps: determining a PDSCH channel TBS table indicating { I_TBS，N_RUMapping relation between TBS value and TBS value; configuring TBS indication information, wherein the TBS indication information at least comprises: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number; the TBS indication information is sent so that the terminal searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then the received PDSCH is decoded according to the TBS value; wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

Optionally, there are a plurality of PDSCH channel TBS tables, where the TBS indication information further includes an indicator of the TBS table, and the indicator of the TBS table is used to indicate the PDSCH channel TBS table; configuring TBS indication information includes: determining an indicator of the PDSCH channel TBS table; configuring an indicator of the TBS table to the TBS indication information.

Optionally, I_TBSA plurality of tables, said I_TBSTable for indicating said I_MCSAnd I_TBSThe TBS indication information further includes I_TBSIndicator of a table, said I_TBSThe indicator of the table is used for indicating the I_TBSTable; configuring TBS indication information includes: determining the I_TBSAn indicator of a table; subjecting the said I_TBSThe indicator of the table is configured in the TBS indication information.

Optionally, the sending the TBS indication information includes: determining DCI, and coding the DCI to obtain a PDCCH; transmitting the PDCCH; wherein at least a portion of the TBS indication information is included in the DCI.

Optionally, the sending the TBS indication information includes: sending a high-level signaling, wherein the high-level signaling comprises UE (user equipment) dedicated physical channel configuration information; wherein at least a portion of the TBS indication information is included in the UE-specific physical channel configuration information.

To solve the foregoing technical problem, an embodiment of the present invention provides a decoding apparatus, including: an indication information receiving module, adapted to receive TBS indication information, where the TBS indication information at least includes: i is_MCSCarrier number and frame number; a first TBS table determining module adapted to determine a PDSCH channel TBS table; a table look-up module adapted to look up the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used to indicate { I }_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number; a decoding module, adapted to decode the received PDSCH according to the TBS value; wherein, in the PDSCH messageIn TBS Table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

To solve the foregoing technical problem, an embodiment of the present invention provides a decoding apparatus, including: a second TBS table determining module adapted to determine a PDSCH channel TBS table indicating { I }_TBS，N_RUMapping relation between TBS value and TBS value; a configuration module adapted to configure TBS indication information, the TBS indication information at least comprising: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number; a sending module, adapted to send the TBS indication information, so that the terminal searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then decodes the received PDSCH according to the TBS value; wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

To solve the above technical problem, an embodiment of the present invention provides a storage medium having stored thereon computer instructions, which when executed perform the steps of the decoding method.

In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method when executing the computer instructions.

In order to solve the above technical problem, an embodiment of the present invention provides a base station, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, all N are set in a PDSCH channel TBS table_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUCorresponding TBS value for different { I } than in the prior art_TBS，N_RUMost are not the same and follow I_TBSAnd N_RUThe increase is increased, and by adopting the scheme of the embodiment of the invention, a plurality of N can be set in the group by setting the grouping with opportunity_RUCorresponding to the same TBS value, there is an opportunity to lower the TBS values in the table so that a single TBS value corresponds to more N_RUI.e. it is advantageous to provide more resources for the same TBS value, so that the code rate can be reduced, especially at I_TBSAnd N_RUIn larger cases, it is possible to achieve a greater degree of code rate reduction, frequency diversity and coding gain, improved reliability, and reduced latency.

Further, by setting in the PDSCH channel TBS table, at each I_TBSEach N of the corresponding plurality of TBS values_RUGroup according to N_RUContaining one or more N in descending order_RUSubgroups, N within each subgroup_RUThe corresponding TBS values are the same and the TBS value of the previous sub-group is smallerIn the TBS values of the latter sub-group, there is a further opportunity to refine the grouping, reduce the TBS values in the table, and further have an opportunity to set multiple N's in the group_RUCorresponding to the same TBS value, making a single TBS value correspond to more N_RUI.e. it is beneficial to provide more resources for the same TBS value, so that the code rate can be further flexibly reduced.

Drawings

FIG. 1 is a flow chart of a decoding method in an embodiment of the present invention;

FIG. 2 is a flowchart of one embodiment of step S13 of FIG. 1;

FIG. 3 is a data flow diagram of another decoding method in an embodiment of the present invention;

FIG. 4 is a flow chart of a further decoding method in an embodiment of the present invention;

FIG. 5 is a flowchart of one embodiment of step S42 of FIG. 4;

FIG. 6 is a flowchart of another embodiment of step S42 of FIG. 4;

FIG. 7 is a data flow diagram of yet another decoding method in an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a decoding apparatus according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another decoding device in the embodiment of the present invention.

Detailed Description

As described above, when decoding is performed based on the TBS value found in the conventional PDSCH channel TBS table, the code rate is often too high, which leads to a decrease in reliability, and decoding failure is likely to occur particularly in an environment with a low SNR. The prior art typically employs time domain repetition to improve reliability, but this results in high latency.

In particular, Spectrum is a very limited resource, and a discrete multicarrier communication system may utilize discrete Spectrum Holes (Spectrum Holes) in the Spectrum to efficiently utilize the Spectrum resource. Such communication systems may typically include multiple or very multiple discrete narrowband carriers. Moreover, such communication systems typically support coverage enhancement, i.e., such communication systems need to operate at low or very low Signal to Noise Ratio (SNR), such as near or below-10 dB, in order to support extended coverage or extreme coverage.

In existing communication systems that support coverage enhancement, e.g., NB-IoT, LTE-M, etc., time domain repetition is typically employed to improve reliability at low SNR or very low SNR to support extended/extreme coverage.

Here, the Downlink data is usually carried by a Physical Downlink Shared Channel (PDSCH).

In practice, I is generally employed_TBSThe table (also known as the modulation and TBS index table) and the TBS table (also known as the transport block size table) allow the UE to find the transport block size to decode the received PDSCH.

Referring to Table 1, Table 1 is a prior art table I_TBSSchematic representation of the table.

TABLE 1

In I_TBSIn the table, one I_MCSCorresponding to a modulation order and an I_TBS. Q in the table_m0，Q_m1Etc. represent modulation orders and may be 2, 4, 6, 8, etc. The transport block size table has two dimensions (dimensions), the horizontal axis corresponding to the number of resource units N_RUThe vertical axis corresponds to the TBS index I_TBSEach of { I_TBS，N_RUThe combination corresponds to one TBS value. Wherein Q is_m1May be greater than or equal to Q_m0，Q_m2May be greater than or equal to Q_m1。

In the discrete multi-carrier system, the downlink data transmission can be performed by using carrier aggregation and frame bundling methods.

At this time, the number of resource units can be determined by the number of carrier aggregation N_carrierNumber of binding to frame N_frameTo obtain the toolThe body may take the following formula:

N_RU＝N_carrier×N_frame

UE is composed of_MCSThe modulation order and transport block size index I can be obtained_TBSFrom I_TBSAnd N_RUThe transport block size can be looked up from the PDSCH channel TBS table and the received PDSCH can be decoded based on the transport block size.

The inventor of the present invention has studied and found that, in the prior art, for various reasons, for example, the number of resources in each resource unit is very limited due to the narrow band, even if the code rate corresponding to the lowest MCS index may be relatively high, the highest code rate corresponding to the lowest modulation order may also be very high, resulting in reduced reliability. Time domain repetition is usually used in the prior art to improve reliability, but this results in severe delay.

Referring to table 2, table 2 is a diagram illustrating a PDSCH channel TBS table in the prior art.

TABLE 2

In Table 2, all TBS values are according to I_TBSAnd N_RUArranged in order from small to large as I_TBSFor example, a1 to a16 may be gradually increased; with N_RUAs an example, a1 to o1 may be gradually increased.

In the prior art, TBS values are for different { I_TBS，N_RUMost are not the same and follow I_TBSAnd N_RUIs increased.

In a specific implementation, the code rate can be calculated by the following formula:

code rate (TBS value + CRC bits) ÷ modulation order ÷ number of resources per RU ÷ N_RU

For example, when { I } is adopted_TBS，N_RUWhere {3, 1}, the table lookup yields that TBS value d 1-88, usually 24, Q, depending on the CRC bits of PDSCH_m0Modulation order of 2, N is commonly represented_RU1-ofThe number of resources is 66, and the code rate is (88+24)/2/66/1 ═ 0.85 by using the above formula. It is noted that although { I }_TBS，N_RUThe value of {3, 1} is chosen to be small, but the code rate is still high, resulting in low communication reliability.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, fig. 1 is a flowchart of a decoding method according to an embodiment of the present invention. The decoding method may be used on the UE side, and may further include steps S11 to S14:

step S11: receiving TBS indication information, wherein the TBS indication information at least comprises: i is_MCSCarrier number and frame number;

step S12: determining a PDSCH channel TBS table;

step S13: searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the TBS value isThe PDSCH channel TBS table is used for indicating { I_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

step S14: and decoding the received PDSCH according to the TBS value.

Wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

In an implementation of step S11, the TBS indication information may be configured by the base station to indicate to the UE to enable the UE to determine the TBS value.

Wherein the TBS indication information at least includes: i is_MCSNumber of carriers and number of frames so that the UE can be according to I_MCSDetermination of I_TBSDetermining the N according to the number of the carriers and the number of frames_RU。

Specifically, I shown in Table 1 may be employed_TBSTable determination of I_TBSAnd the number N of possible carrier aggregations_carrierNumber of binding to frame N_frameTo obtain N_RUFor example, the aforementioned formula may be used to determine the N_RU：

N_RU＝N_carrier×N_frame

Further, the I_TBSThe table may be one or more, or may be predefined, and may be predetermined, for example, by a communication protocol, so that both the base station and the UE are available in advance.

Further, the I_TBSThere may be more than one table, said I_TBSTables may be used to indicate the I_MCSAnd I_TBSThe TBS indication information may further include I_TBSIndicator of a table, said I_TBSThe indicator of the table is used for indicating the I_TBSTable (7).

In particular implementations, the UE may be in accordance with the I_TBSIndicator of table, determining the PDSCH channel I_TBSTable (7).

Wherein, the I_TBSThe indicator of the table may also be said I_TBSIndex of table for indicating which I is specific_TBSTable (7).

Wherein, the I_TBSThe indicator of the table may occupy a number of bits of

S is for the representation of I_TBSThe number of tables.

In the embodiment of the invention, a plurality of I are arranged_TBSTable for helping base station to select more proper I for UE according to specific situation and requirement_TBSAnd the communication quality is further improved.

Further, the step of receiving TBS indication information may include: receiving a Physical Downlink Control Channel (PDCCH) and decoding to obtain Downlink Control Information (DCI); wherein at least a portion of the TBS indication information is included in the DCI.

It is noted that all of the TBS indication information may be included in the DCI, a part of the TBS indication information may be included in the DCI, and another part may be included in other information, for example, UE-specific physical channel configuration information. The embodiment of the present invention is not limited thereto.

Further, the step of receiving TBS indication information may include: receiving a high-level signaling, wherein the high-level signaling comprises UE (user equipment) special physical channel configuration information; wherein at least a portion of the TBS indication information is included in the UE-specific physical channel configuration information.

It should be noted that the TBS indication information may be completely included in the UE-specific physical channel configuration information, a part of the TBS indication information may be included in the UE-specific physical channel configuration information, and another part may be included in other information, for example, DCI. The embodiment of the present invention is not limited thereto.

In an implementation of step S12, the UE may determine the PDSCH channel TBS table.

Specifically, the PDSCH channel TBS table may be one or more, or may be predefined, and may be predetermined by a communication protocol, for example, so that both the base station and the UE can obtain the table in advance.

Further, there may be a plurality of PDSCH channel TBS tables, and the TBS indication information further includes an indicator of the TBS table, where the indicator of the TBS table is used to indicate the PDSCH channel TBS table; the step of determining the PDSCH channel TBS table may include: and determining the PDSCH channel TBS table according to the indicator of the TBS table.

The indicator of the TBS table may also be an index of the PDSCH channel TBS table, and is used to indicate which PDSCH channel TBS table is specific.

Wherein, the bit number occupied by the indicator of the PDSCH channel TBS table may be

N is used to indicate the number of PDSCH channel TBS tables.

In the embodiment of the invention, the base station is facilitated to select a more proper PDSCH channel TBS table for the UE according to specific conditions and requirements by setting a plurality of PDSCH channel TBS tables, thereby improving the communication quality.

Wherein, in the PDSCH channel TBS table, all N_RUCan be divided into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUCorresponding TBS value.

Referring to table 3, table 3 is a schematic diagram of a PDSCH channel TBS table in the embodiment of the present invention.

TABLE 3

In Table 3, all N_RUIs divided into 2N according to the sequence from small to large_RUGroups, respectively corresponding to N_RUThe values of (a) are 1-8, and 9-16. Minimum N within the latter group_RUThe corresponding TBS value is greater than the maximum N in the previous group_RUCorresponding TBS value in I_TBSFor example, 0, a2 > a 1. It should be noted that the arrangement and size relationship of each column of data can follow the prior art, for example, in N_RUAs an example, a1 to o1 may be gradually increased.

It should be noted that, in the embodiment of the present invention, the TBS value in the PDSCH channel TBS table may be selected to be smaller.

Specifically, it can be known from the formula for calculating the code rate that the smaller the TBS value is, the smaller N is_RUThe larger the resource, the more resources, the more helpful to reduce the code rate:

For example, when { I } is adopted_TBS，N_RUWhere {3, 8}, the table lookup yields that TBS value d 1-88, usually 24, Q, based on the CRC bits of PDSCH_m0Modulation order of 2, N is commonly represented_RUThe number of resources of 8 is 66 × 8, and the code rate of (88+24)/2/66/8 is 0.11 by using the above formula. The code rate is significantly reduced and coding gain can be obtained. When configured as such as N_carrier＝8，N_frame1 or N_carrier＝4，N_frameFor 2 or so, { I ] is used for comparison_TBS，N_RUThe invention is {3, 1} and the time domain is repeated 8 times, for the same TBS value and using the same amount of resources, the invention can obviously reduce the time delay, and can obtain the frequency diversity and the code rateThe coding gain is obtained by reducing, and the reliability is further improved.

TBS values are for different { I than in the prior art shown in table 2_TBS，N_RUMost are not the same and follow I_TBSAnd N_RUMay be increased by setting a group, there is an opportunity to set a plurality of N within a group_RUCorresponding to the same TBS value, there is an opportunity to lower the TBS values in the table so that a single TBS value corresponds to more N_RUI.e. it is advantageous to provide more resources for the same TBS value, so that the code rate can be reduced, especially at I_TBSAnd N_RUIn larger cases, it is possible to achieve a greater degree of code rate reduction, frequency diversity and coding gain, improved reliability, and reduced latency.

Further, in the PDSCH channel TBS table, at each I_TBSEach N of the corresponding plurality of TBS values_RUGroups may be according to N_RUContaining one or more N in descending order_RUSubgroups, N within each subgroup_RUThe corresponding TBS values are the same, and the TBS value of the previous sub-group is smaller than that of the next sub-group.

Referring to table 4, table 4 is a schematic diagram of another PDSCH channel TBS table in the embodiment of the present invention.

TABLE 4

In Table 4, all N_RUIs divided into 2N according to the sequence from small to large_RUGroups, respectively corresponding to N_RUThe values of (a) are 1-8, and 9-16. In N_RUIn the previous group with values of 1-8, each row (i.e. each I)_TBSCorresponding TBS values) comprises 1 to 2N_RUSubgroup with I_TBSFor example, 0, two N_RUSubgroups correspond to N respectively_RUThe values of (a) are 1-5 and 6-8; with I_TBSFor example, comprising only one N_RUA subgroup; in Table 4, for each Q in Table 1_mCorresponding to I_TBSThe first few of the interiorAre all correspondingly at N_RUTwo subgroups are arranged in the group, because the original code rate is relatively low, the code rate can be reduced by providing a little more resource, and the code rate can be reduced by providing a little more resource because the original code rate is high or high. More flexibility is given by the arrangement of the subgroups in embodiments of the invention.

Wherein N in each subgroup_RUThe corresponding TBS values are the same, and the TBS value of the previous sub-group is smaller than that of the next sub-group. With I_TBSFor example, a4 > a3 > a2 > a 1.

And still satisfy N adjacent to each other two group numbers_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUCorresponding TBS value in I_TBSFor example, 0, the minimum N of the latter group_RUCorresponding TBS value a3 > maximum N of previous group_RUCorresponding TBS value a 2.

It should be noted that the arrangement and size relationship of each column of data can follow the prior art, for example, in N_RUAs an example, a1 to o1 may be gradually increased.

It should be noted that when there are multiple PDSCH channel TBS tables, one part of the PDSCH channel TBS table may be set as the TBS table in the embodiment of the present invention, and another part of the PDSCH channel TBS table may be set as the appropriate TBS table disclosed in the prior art, which helps to improve the adaptability of the application.

Further, I in the PDSCH channel TBS table_TBSA portion of the corresponding TBS value may be disabled.

In the embodiment of the present invention, by disabling a part of the row data in the PDSCH channel TBS table, a truncated mode (also referred to as a shortened transmission mode) may be used, which is helpful for improving the adaptability of the application.

Further, { I ] in the PDSCH channel TBS table_TBS，N_RUA portion of the corresponding TBS values may be disabled.

In the embodiment of the invention, a part of TBS values in a PDSCH channel TBS table are forbidden, so that a truncated transmission mode can be matched, and the adaptability of application is improved.

In the specific implementation of step S13, the UE searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used to indicate { I }_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUAnd determining according to the carrier number and the frame number.

Referring to fig. 2, fig. 2 is a flowchart of an embodiment of step S13 in fig. 1. The step of searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value may include steps S21 to S23, which are described below.

In step S21, according to the I_TBSIndicator of table, determining the PDSCH channel I_TBSTable (7).

In step S22, based on the I_MCSLooking up the I_TBSTable to determine said I_TBS。

In step S23, based on the I_TBSLook up the PDSCH channel TBS table to determine the TBS value.

In the embodiment of the invention, the I is received through TBS indication information_TBSIndicators of tables and based on said I_MCSDetermining the I_TBSThe TBS value can be determined by the UE, so that the base station is helped to select more proper I for the UE according to specific situations and requirements on the basis of the PDSCH channel TBS table adopting the embodiment of the invention_TBSAnd the communication quality is further improved.

With continued reference to fig. 1, in an implementation of step S14, the UE may decode the received PDSCH according to the TBS value.

In the embodiment of the present invention, any appropriate manner may be adopted to decode the PDSCH based on the TBS value, which is not limited in the embodiment of the present invention.

In the embodiment of the invention, all N are set in a PDSCH channel TBS table_RUIn accordance with fromThe order of small to large is divided into a plurality of N_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUCorresponding TBS value for different { I } than in the prior art_TBS，N_RUMost are not the same and follow I_TBSAnd N_RUThe increase is increased, and by adopting the scheme of the embodiment of the invention, a plurality of N can be set in the group by setting the grouping with opportunity_RUCorresponding to the same TBS value, there is an opportunity to lower the TBS values in the table so that a single TBS value corresponds to more N_RUI.e. it is advantageous to provide more resources for the same TBS value, so that the code rate can be reduced, especially at I_TBSAnd N_RUIn larger cases, it is possible to achieve a greater degree of code rate reduction, frequency diversity and coding gain, improved reliability, and reduced latency.

Referring to fig. 3, fig. 3 is a data flow diagram of another decoding method according to an embodiment of the present invention. The other decoding method may be used on the UE side, and may include steps S301 to S307, which are described below.

Step S301: the UE32 receives TBS indication information from the base station 31.

Step S302: the UE32 determines the PDSCH channel TBS table according to the indicator of the TBS table.

Step S303: UE32 is according to the I_TBSIndicator of table, determining the PDSCH channel I_TBSTable (7).

Step S304: UE32 is based on the I_MCSLooking up the I_TBSTable to determine said I_TBS。

Step S305: UE32 is based on the I_TBSLook up the PDSCH channel TBS table to determine the TBS value.

Step S306: the UE32 receives the PDSCH from the base station 31.

Step S307: the UE32 decodes the received PDSCH according to the TBS value.

In a specific implementation, more details about step S301 to step S307 are performed with reference to the description of steps in fig. 1 and fig. 2, and are not described herein again.

Referring to fig. 4, fig. 4 is a flowchart of another decoding method according to an embodiment of the present invention. The still another decoding method may be used at the base station side, and may include steps S41 to S43:

step S41: determining a PDSCH channel TBS table indicating { I_TBS，N_RUMapping relation between TBS value and TBS value;

step S42: configuring TBS indication information, wherein the TBS indication information at least comprises: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

step S43: and sending the TBS indication information to enable the terminal to search the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then decoding the received PDSCH according to the TBS value.

In the implementation of step S41, the base station may determine the PDSCH channel TBS table suitable for the UE in any suitable manner, which is not limited in the embodiment of the present invention.

Further, please refer to the description of the steps in fig. 1 and fig. 2 for further description of the PDSCH channel TBS table in the embodiment of the present invention, which is not repeated herein.

In an implementation of step S42, there may be a plurality of implementations of the step of configuring the TBS indication information by the base station.

Referring to fig. 5, fig. 5 is a flowchart of an embodiment of step S42 in fig. 4.

The step of configuring the TBS indication information by the base station may include steps S51 and S52, and each step will be described below.

In step S51, the base station may determine an indicator of the PDSCH channel TBS table.

In step S52, the base station may configure an indicator of the TBS table in the TBS indication information.

It should be noted that the base station may determine the indicator of the PDSCH channel TBS table in an appropriate manner, which is not limited in the embodiment of the present invention.

Referring to fig. 6, fig. 6 is a flowchart of another specific implementation of step S42 in fig. 4.

The step of configuring the TBS indication information by the base station may include steps S61 and S62, and each step will be described below.

In step S61, the base station may determine the I_TBSAn indicator of a table.

In step S52, the base station may assign the I_TBSThe indicator of the table is configured in the TBS indication information.

It is noted that the base station may determine the I in a suitable manner_TBSThe table indicator is not limited in this embodiment of the present invention.

With continued reference to fig. 4, in an implementation of step S43, the step of the base station sending the TBS indication information to the UE may include: determining DCI, and coding the DCI to obtain a PDCCH; transmitting the PDCCH; wherein at least a portion of the TBS indication information is included in the DCI.

The step of the base station sending the TBS indication information to the UE may include: sending a high-level signaling, wherein the high-level signaling comprises UE (user equipment) dedicated physical channel configuration information; wherein at least a portion of the TBS indication information is included in the UE-specific physical channel configuration information.

In the embodiment of the invention, the user can select according to specific conditions by setting various modes for sending the TBS indication information, thereby providing convenience for the user.

In the specific implementation, please refer to the description of steps S1 and S2 for further details regarding steps S41 to S43, which are not repeated herein.

Referring to fig. 7, fig. 7 is a data flow diagram of another decoding method according to an embodiment of the present invention. The further decoding method may be applied to the base station side, and may include steps S701 to S708, which are described below.

Step S701: the base station 71 determines the PDSCH channel TBS table.

Step S702: the base station 71 determines an indicator of the PDSCH channel TBS table.

Step S703: the base station 71 configures an indicator of the TBS table in the TBS indication information.

Step S704: the base station 71 determines said I_TBSAn indicator of a table.

Step S705: base station 71 converts said I_TBSThe indicator of the table is configured in the TBS indication information.

Step S706: the base station 71 sends TBS indication information to the UE 72.

Step S707: the base station 71 transmits PDSCH to the UE 72.

Step S708: the UE72 searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then decodes the received PDSCH according to the TBS value.

In a specific implementation, more details about steps S701 to S708 are performed with reference to the descriptions of steps in fig. 1 to 6, which are not described herein again.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a decoding apparatus in the embodiment of the present invention, where the decoding apparatus may be used on a UE side, and may further include:

an indication information receiving module 81, adapted to receive TBS indication information, where the TBS indication information at least includes: i is_MCSCarrier number and frame number;

a first TBS table determination module 82 adapted to determine a PDSCH channel TBS table;

a table look-up module 83 adapted to look up the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used to indicate { I }_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

a decoding module 84 adapted to decode the received PDSCH according to the TBS value;

wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value; said I_TBSFor representing TBS indexSaid I is_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

For the principle, specific implementation and beneficial effects of the decoding apparatus, please refer to the related description about the decoding method shown in the foregoing and fig. 1 to 3, which is not repeated herein.

Fig. 9 is a schematic structural diagram of another decoding device in the embodiment of the present invention. The another decoding apparatus may be used on the base station side, and may further include:

a second TBS table determining module 91 adapted to determine a PDSCH channel TBS table indicating { I }_TBS，N_RUMapping relation between TBS value and TBS value;

a configuration module 92, adapted to configure TBS indication information, where the TBS indication information at least includes: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

a sending module 93, adapted to send the TBS indication information, so that the terminal searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then decodes the received PDSCH according to the TBS value;

For the principle, specific implementation and beneficial effects of the other decoding apparatus, please refer to the related description about the decoding method shown in fig. 4 to fig. 7 and the foregoing description, which is not repeated herein.

The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the steps of the decoding method are executed when the computer instructions are executed. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.

Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be another 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, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also 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 and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

An embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method shown in fig. 1 to 3 when executing the computer instructions. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.

Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

The embodiment of the present invention further provides a base station device, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method shown in fig. 4 to 7 when executing the computer instructions. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, the device providing the base station function in the 2G network includes a Base Transceiver Station (BTS), the device providing the base station function in the 3G network includes a node B (nodeb), the device providing the base station function in the 4G network includes an evolved node B (eNB), and in a Wireless Local Area Network (WLAN), the device providing the base station function is an Access Point (AP), a device providing the base station function in the 5G New Radio (NR), a gbb (ng-eNB), and the ng-eNB, where the gbb and the terminal communicate with each other by using an NR technique, and the ng-eNB and the terminal communicate with each other by using an E-utra (evolved Universal Radio access) technique, and both the gbb and the ng-eNB may be connected to the 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.

The base station controller in the embodiment of the present application is a device for managing a base station, for example, a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, or a device for controlling and managing a base station in a future new communication system.

The network on the network side in the embodiment of the present invention refers to a communication network providing communication services for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A decoding method, comprising the steps of:

receiving TBS indication information, wherein the TBS indication information at least comprises: i is_MCSCarrier number and frame number;

determining a PDSCH channel TBS table;

searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used forIn the indication { I_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

decoding the received PDSCH according to the TBS value;

wherein, in the PDSCH channel TBS table, all N_RUDividing into a plurality of N according to the order from small to large_RUGroup at each I_TBSN adjacent to each other in each of two TBS values_RUN between groups with large group number_RUMinimum N within a group_RUCorresponding TBS value is greater than N with small group number_RUMaximum N within a group_RUThe corresponding TBS value;

said I_TBSFor representing the TBS index, said I_MCSFor representing MCS index, the N_RUFor indicating the number of resource units.

2. The decoding method of claim 1, wherein in the PDSCH channel TBS table, at each I_TBSEach N of the corresponding plurality of TBS values_RUGroup according to N_RUContaining one or more N in descending order_RUSubgroups, N within each subgroup_RUThe corresponding TBS values are the same, and the TBS value of the previous sub-group is smaller than that of the next sub-group.

3. The decoding method of claim 1, wherein there are a plurality of PDSCH channel TBS tables, and the TBS indication information further comprises an indicator of a TBS table, wherein the indicator of the TBS table is used for indicating the PDSCH channel TBS table;

determining the PDSCH channel TBS table comprises:

and determining the PDSCH channel TBS table according to the indicator of the TBS table.

4. The decoding method of claim 1, wherein I_TBSA plurality of tables, said I_TBSTable for indicating said I_MCSAnd I_TBSOne-to-one mapping ofThe TBS indication information further includes I_TBSIndicator of a table, said I_TBSThe indicator of the table is used for indicating the I_TBSTable;

searching the PDSCH channel TBS table according to the TBS indication information to determine a TBS value comprises:

according to the formula I_TBSIndicator of table, determining the PDSCH channel I_TBSTable;

based on the I_MCSLooking up the I_TBSTable to determine said I_TBS；

Based on the I_TBSLook up the PDSCH channel TBS table to determine the TBS value.

5. The decoding method of claim 1, wherein receiving TBS indication information comprises: receiving and decoding a PDCCH to obtain DCI;

wherein at least a portion of the TBS indication information is included in the DCI.

6. The decoding method of claim 1, wherein receiving TBS indication information comprises: receiving a high-level signaling, wherein the high-level signaling comprises UE (user equipment) special physical channel configuration information;

wherein at least a portion of the TBS indication information is included in the UE-specific physical channel configuration information.

7. The decoding method according to claim 1,

i in the PDSCH channel TBS table_TBSA portion of the corresponding TBS value is disabled.

8. The decoding method according to claim 1,

{ I in the PDSCH channel TBS table_TBS，N_RUA portion of the corresponding TBS values are disabled.

9. A decoding method, comprising the steps of:

determining a PDSCH channel TBS table indicating { I_TBS，N_RUMapping relation between TBS value and TBS value;

configuring TBS indication information, wherein the TBS indication information at least comprises: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

the TBS indication information is sent so that the terminal searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then the received PDSCH is decoded according to the TBS value;

10. The decoding method of claim 9, wherein in the PDSCH channel TBS table, at each I_TBSEach N of the corresponding plurality of TBS values_RUGroup according to N_RUContaining one or more N in descending order_RUSubgroups, N within each subgroup_RUThe corresponding TBS values are the same, and the TBS value of the previous sub-group is smaller than that of the next sub-group.

11. The decoding method of claim 9, wherein there are a plurality of PDSCH channel TBS tables, and the TBS indication information further includes an indicator of a TBS table, the indicator of the TBS table being used for indicating the PDSCH channel TBS table;

configuring TBS indication information includes:

determining an indicator of the PDSCH channel TBS table;

configuring an indicator of the TBS table to the TBS indication information.

12. The decoding method of claim 9, wherein I_TBSA plurality of tables, said I_TBSTable for indicating said I_MCSAnd I_TBSThe TBS indication information further includes I_TBSIndicator of a table, said I_TBSThe indicator of the table is used for indicating the I_TBSTable;

configuring TBS indication information includes:

determining the I_TBSAn indicator of a table;

subjecting the said I_TBSThe indicator of the table is configured in the TBS indication information.

13. The decoding method of claim 9, wherein sending the TBS indication information comprises:

determining DCI, and coding the DCI to obtain a PDCCH;

transmitting the PDCCH;

14. The decoding method of claim 9, wherein sending the TBS indication information comprises:

sending a high-level signaling, wherein the high-level signaling comprises UE (user equipment) dedicated physical channel configuration information;

15. The decoding method according to claim 9,

16. The decoding method according to claim 9,

17. A decoding apparatus, comprising:

an indication information receiving module, adapted to receive TBS indication information, where the TBS indication information at least includes: i is_MCSCarrier number and frame number;

a first TBS table determining module adapted to determine a PDSCH channel TBS table;

a table look-up module adapted to look up the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, wherein the PDSCH channel TBS table is used to indicate { I }_TBS，N_RUMapping relation between TBS value and said I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

a decoding module, adapted to decode the received PDSCH according to the TBS value;

18. A decoding apparatus, comprising:

a second TBS table determining module adapted to determine a PDSCH channel TBS table indicating { I }_TBS，N_RUMapping relation between TBS value and TBS value;

configuration module adapted to configureSetting TBS indication information, wherein the TBS indication information at least comprises: i is_MCSNumber of carriers and number of frames, wherein I_TBSAccording to I_MCSDetermination of said N_RUDetermining according to the carrier number and the frame number;

a sending module, adapted to send the TBS indication information, so that the terminal searches the PDSCH channel TBS table according to the TBS indication information to determine a TBS value, and then decodes the received PDSCH according to the TBS value;

19. A storage medium having stored thereon computer instructions for performing the steps of the decoding method of any one of claims 1 to 8 or the steps of the decoding method of any one of claims 9 to 16 when the computer instructions are executed.

20. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the decoding method according to any one of claims 1 to 8.

21. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the decoding method of any one of claims 9 to 16.