WO2014056131A1 - Procédé et dispositif de commande de transmission de données - Google Patents

Procédé et dispositif de commande de transmission de données Download PDF

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Publication number
WO2014056131A1
WO2014056131A1 PCT/CN2012/082547 CN2012082547W WO2014056131A1 WO 2014056131 A1 WO2014056131 A1 WO 2014056131A1 CN 2012082547 W CN2012082547 W CN 2012082547W WO 2014056131 A1 WO2014056131 A1 WO 2014056131A1
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WIPO (PCT)
Prior art keywords
tbs
layer
elements
available
draft
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PCT/CN2012/082547
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English (en)
Chinese (zh)
Inventor
张磊
王轶
周华
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富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2012/082547 priority Critical patent/WO2014056131A1/fr
Priority to CN201280075932.1A priority patent/CN104641675A/zh
Publication of WO2014056131A1 publication Critical patent/WO2014056131A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission control method and apparatus. Background technique
  • the base station in order to maintain downlink coverage of a cell, the base station needs to transmit a downlink dedicated control channel (PDCCH, physical downlink control channel) for a dedicated pilot ( CRS, Cell-specific Reference Signal (PBCH, Physical Broadcast CHannel) Synchronization signal (PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)).
  • PBCH Cell-specific Reference Signal
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the PBCH and PSS/SSS signals are transmitted in the middle of the system bandwidth 6 RB (Resource Block), and the PDCCH and CRS are transmitted in the whole system bandwidth.
  • the R12 version of LTE introduces a new carrier type.
  • NCT New Carrier Type
  • the legacy PDCCH will be replaced by an enhanced PDCCH (ePDCCH).
  • ePDCCH enhanced PDCCH
  • the CRS is no longer transmitted every subframe, but in a period of 5ms (5 subframes), and is transmitted in only one of the subframes per cycle. Therefore, compared with the conventional carrier, the resources available for transmitting user data in each RB resource of the NCT are greatly increased.
  • the only necessary pilots to transmit are the DMRS (DeModulation Reference Signal) and the CSI-RS (Channel State Information-Reference Signal), and the PSS transmitted in the middle 6 RBs. /SSS and other signals.
  • the base station when the base station transmits data to the UE (User Equipment, User Equipment) through the PDSCH (Physical Downlink Shared Channel), the base station notifies the UE of the number of resources used in the transmission (the number of RBs).
  • a transmission employed in the modulation and coding scheme index IMCS MCS (modulation and Code scheme ) index
  • 0 UE may 7.1.7.1-1 (modulation and TBS index table) according to the table to check the available transport block size TS36.213 Index I TBS (Transport Block Size index), according to the number of I TBS and RB according to Table 7.1.7.2-1, Table 7.1.7.2.2-1, Table 7 ⁇ 7.2.4-1, Table 7.1.7.2.5-1 (TBS table) The number of information bits in the base station's transmission is checked and correctly decoded according to the standard convention.
  • TS36.213 Index I TBS Transport Block Size index
  • the base station if the base station schedules the UE to perform uplink data transmission in a certain subframe through the PUSCH (Physical Uplink Shared Channel), the base station notifies the UE of the number of resources used in the scheduling (the number of RBs) and the scheduled uplink transmission.
  • the UE may find the I TBS (modulation and TBS index relation table) from Table 8.6.1-1 according to I MCS , and according to the number of I TBS and RB according to Table 7.1.7.2-1, Table 7.1.7.2.2-1 Table 7.1.7.2.4-1 and Table 7.1.7.2.5-1 find the number of information bits of this transmission, and thus correctly encode according to the standard convention to complete the uplink transmission.
  • the transmission frequency of the CRS pilot is also transmitted once every 1 ms, and is changed every 5 ms, and the resources available for transmitting user data in each RB resource are greatly Increased, so the traditional Transport Block Size (TBS) form is no longer applicable.
  • TBS Transport Block Size
  • An object of the embodiments of the present invention is to provide a data transmission control method and apparatus suitable for a novel carrier, which can better improve data transmission efficiency by using a new TBS table.
  • a data transmission control method includes:
  • a user equipment receives a resource block (RB) number and a modulation and coding scheme (MCS) index transmitted by the base station for data transmission;
  • RB resource block
  • MCS modulation and coding scheme
  • the UE determines a transport block size (TBS) cable by querying a modulation and TBS index relationship table;
  • the UE determines the number of information bits for data transmission by querying a predetermined TBS table, and then correctly encoding or decoding the data;
  • the layer-one table in the predetermined TBS table includes information bit numbers corresponding to each available RB number of each TBS index
  • each element in the layer-one table in the predetermined TBS table is determined by: Extracting all TBS elements in the standard TBS table to generate a TBS element candidate sequence; calculating each TBS index and each according to the code rate and modulation mode of the standard TBS table and the available resource particles (RE) number of each RB Generating the first layer of a table draft by using the number of information bits of the RB number containing the CRC bits;
  • a data transmission control method includes:
  • the base station is configured according to the number of information bits to be downlinked to the UE, the number of information bits to be uploaded on the UE side, the current resource allocation, the channel link quality between the UE and the base station, the modulation and TBS index relationship table, and the predetermined TBS table.
  • the UE selects the number of RBs for transmitting data (the downlink data to be downlinked or the uplink data to be uploaded) and the MCS index;
  • the base station sends the RB number and the MCS index to the UE, so that the UE determines the TBS index according to the MCS index combined with the TBS index relationship table, and combines the predetermined number according to the RB number and the TBS index.
  • the TBS table determines the number of information bits of the uplink transmission or the downlink transmission, and then correctly encodes or decodes the data;
  • the layer-one table in the predetermined TBS table includes information bit numbers corresponding to each available RB number of each TBS index
  • each element in the layer-one table in the predetermined TBS table is determined by: extracting all TBS elements in the standard TBS table to generate a TBS element candidate sequence; according to the code rate of the standard TBS table a modulation mode and a number of available resource particles (RE) per RB, calculating a number of information bits containing CRC bits corresponding to each TBS index and each available RB number, to generate a first layer of a table draft; Removing the CRC bits in the information bits in the first layer of a draft form to generate a second layer of a table grass;
  • RE resource particles
  • a user equipment UE
  • the UE includes:
  • a receiving unit which receives the number of RBs and MCS index sent by the base station for data transmission;
  • a query unit which uses the MCS index to determine a TBS index by querying a modulation and TBS index relationship table, and uses the RB number and the TBS index to determine a number of information bits for data transmission by querying a predetermined TBS table, and further Correctly encoding or decoding the data;
  • a storage unit that stores the modulation and TBS index relationship table and the predetermined TBS table; wherein the layer-one table in the predetermined TBS table includes each of the available ones for each TBS index
  • each element in the layer-one table in the predetermined TBS table is determined by: extracting all TBS elements in the standard TBS table to generate a TBS element candidate sequence; according to the code rate of the standard TBS table a modulation mode and a number of available resource particles per resource block, and calculating a number of information bits containing CRC bits corresponding to each TBS index and each available RB number, to generate a first layer of a table draft;
  • the behavior of the first layer, the draft of the first layer, the draft of the second layer, the draft of the first layer, the draft of the first layer, the draft of the second layer, and the list of the first layer are available RBs. number; Wherein, if the absolute value of the difference between two elements in the candidate sequence of the TBS element and one element in the draft of the second layer is the smallest, according to the code rate corresponding to the two elements, An element having a smaller absolute value of a difference in target bit rate of a row in which an element is located is an element at a position of the one element in the layer-one table;
  • 3-7 elements replace the 2-6th element of the column in order, and the 7th element of the column is changed to 328;
  • the element with the smaller TBS index is replaced by the element of the candidate sequence that is smaller than the element number, wherein , the two elements do not contain the element with the value 328 in the first column;
  • the following elements in the layer-one table are adjusted such that the frequency of occurrence of these elements in the layer-table is close to the standard TBS table: 16, 24, 40, 56, 72, 104, 120, 144 , 152, 176, 208, 224, 256, 296, 328, 344, 392, 440, 488, 504, 536, 568.
  • a base station includes: a selecting unit, according to the number of information bits to be downlinked to the UE or the number of information bits to be uploaded on the UE side, current resource allocation a case, a channel link quality between the UE and the base station, a modulation and TBS index relationship table, and a TBS table for the UE to select for transmitting data (the downlink data to be downlinked or the uplink data to be uploaded) RB number and MCS index;
  • a sending unit configured to send the RB number and the MCS index to the UE, so that the UE determines a TBS index according to the MCS index combined with a TBS index relationship table, and then combines the RB number according to the TBS index
  • the predetermined TBS table determines the number of information bits of the current uplink transmission or the downlink transmission, and then correctly encodes or decodes the data
  • the layer-one table in the predetermined TBS table includes each of the available ones for each TBS index Number of information bits of the RB number;
  • each element in the layer-one table in the predetermined TBS table is determined by: extracting all TBS elements in the standard TBS table to generate a TBS element candidate sequence; according to the code rate of the standard TBS table a modulation mode and a number of available resource particles per resource block, and calculating a number of information bits containing CRC bits corresponding to each TBS index and each available RB number, to generate a first layer of a table draft;
  • the behavior of the first layer, the draft of the first layer, the draft of the second layer, the draft of the first layer, the draft of the first layer, the draft of the second layer, and the list of the first layer are available RBs.
  • the element with the smaller TBS index is replaced by the element of the candidate sequence that is smaller than the element number, wherein , the two elements do not contain the element with the value 328 in the first column;
  • the following elements in the layer-one table are adjusted such that the frequency of occurrence of these elements in the layer-table is close to the standard TBS table: 16, 24, 40, 56, 72, 104, 120, 144 152, 176, 208, 224, 256, 296, 328, 344, 392, 440, 488, 504, 536, 568.
  • the communication system comprises the aforementioned user equipment; and the foregoing base station.
  • the beneficial effects of the embodiments of the present invention are as follows:
  • a new TBS table in the data transmission process, resources available for data transmission in each resource block are expanded, and data transmission efficiency is improved.
  • the new TBS table reuses the TBS element in the existing form (the TBS form used in the current standard, which is referred to as a standard TBS form in the embodiment of the present invention)
  • the inconvenience of the high-level configuration information is reduced.
  • the new TBS table basically retains the TBS element for MAC signaling transmission and VoIP service, the normal transmission of MAC signaling and the normal development of VoIP service are guaranteed.
  • FIG. 1 is a flowchart of a data transmission control method according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of a method for determining a layer one table
  • 3 is a flow chart of a method for determining a layer two table
  • 4 is a flow chart of a method for determining a layer three table
  • Figure 5 is a flow chart of a method for determining a layer four table
  • Figure 6 is a flow chart of a method for determining new elements in a layer four table
  • FIG. 7 is a flowchart of a method for determining a layer-table in a data transmission control method according to another embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of a data transmission control method according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a base station according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention uses the base station to transmit downlink data to the UE or the base station to schedule the UE to perform uplink data transmission, and the UE determines the data for use by looking up the table.
  • the data transmission control method of the embodiment of the present invention is described as an example. However, it can be understood that the embodiment of the present invention is not limited to the foregoing data transmission process, and is applicable to a data transmission process involving a table lookup.
  • Embodiments of the present invention provide a data transmission control method.
  • Figure 1 is a flow chart of the method. Referring to Figure 1, the method includes:
  • Step 101 A user equipment (UE) receives a resource block (RB) number and a modulation and coding scheme (MCS) index sent by a base station for data transmission;
  • RB resource block
  • MCS modulation and coding scheme
  • the number of RBs used for data transmission and the MCS index refer to the number of RBs used in the transmission and the MCS index; when the base station schedules the UE for uplink data transmission
  • the number of RBs used for data transmission and the MCS index refer to the number of RBs used by the UE to transmit data and the MCS cable.
  • Step 102 The UE determines, by using the MCS index, a transport block size (TBS) index by querying a modulation and TBS index relationship table.
  • TBS transport block size
  • the TBS index can be determined by querying the modulation and TBS index relationship table.
  • Step 103 The UE determines the number of information bits of the data transmission by querying the predetermined TBS table by using the RB number and the TBS index, and then correctly encoding or decoding the data.
  • the base station sends the downlink data to the UE
  • the UE can determine the number of information bits used by the base station in the data transmission by querying the TBS table (referred to as a predetermined TBS table) in the embodiment of the present invention.
  • Decoding when the base station schedules the UE to perform uplink data transmission, the UE can determine the number of information bits used by the uplink data transmission by querying the TBS table (referred to as a predetermined TBS table) of the embodiment of the present invention, thereby Correctly coded to complete the upstream transmission.
  • the predetermined TBS table includes a layer one table, a layer two table, a layer three table, and a layer four table, wherein the layer one table includes the number of information bits of each available RB number corresponding to each TBS index.
  • the behavior TBS index of the predetermined TBS table follows the 0 ⁇ 26 modulation and coding scheme level in the standard TBS table, and has 27 levels. For example, the first row of the TBS table indicates that each TBS index is 0. An element corresponding to the number of available RBs, and the 27th line indicates an element corresponding to the number of available RBs having a TBS index of 26.
  • the column of the predetermined TBS table is an available resource block (the number of RBs), and the number of available RBs is from 1 RB to 110 RB.
  • the first column of the TBS table indicates that the number of available resource blocks is 1 RB
  • the 110th column Indicates that the number of available resource blocks is 110 RBs.
  • the signal such as PSS/SSS and the extended CP (Cyclic Prefix) are not considered.
  • the code is matched by the rate matching method stipulated in the standard TS36.212.
  • each element in the layer-by-table in the predetermined TBS table is determined by the method shown in FIG. 2.
  • the method includes:
  • Step 201 Extract all TBS elements in the standard TBS table to generate a TBS element candidate sequence
  • the embodiment of the present invention reuses the TBS element in the existing table as much as possible.
  • the existing form which is the TBS form used by the standard, is referred to as the standard TBS form in this embodiment, including Table 7.1.7.2-1-1 (Layer 1 form), Table 7.1.7.2.2-1 (Layer 2 form) ), Table 7.1.7.2.4-1 (Layer 3 table), Table 7.1.7.2.5-1 (Layer 4 table).
  • the candidate sequence of the TBS element may be sequentially arranged, for example, by two columns, wherein the first column is an element number (index), and the second column is an element value.
  • Step 202 Calculate according to the code rate and modulation mode of the standard TBS table and the number of available REs per RB. Generating a first layer of a table draft corresponding to each TBS index and the number of information bits containing CRC bits for each available RB number;
  • the code rate is multiplied and rounded up to determine the number of information bits containing the CRC bits, generating a
  • the 27*110 form is called the first level and a draft form.
  • Step 203 Remove the CRC bits in the information bits in the draft of the first layer, and generate a second layer of a draft;
  • this embodiment since the elements contained in the standard TBS table do not contain CRC bits, in order to reuse the elements in the standard TBS table as much as possible, this embodiment also removes the CRC bits in the information bits of each element in the table.
  • the CRC bit in the information bits in the draft of the first layer can be reversely removed according to the method of adding the CRC bit in TS 36.212, thereby obtaining another table of 27*110, which is called the second layer and a draft of the table. .
  • Step 204 traverse each element in the second layer of a draft of a table, select an element having the smallest absolute value of the difference from the each element from the TBS element candidate sequence, and fill the selected element into the The position of each element is generated in a table of layers.
  • the element having the smallest absolute value of the difference from the element A is selected from the candidate sequence of the TBS element extracted in step 201, and is filled in as the corresponding element of the element A.
  • the location of A By performing this processing on each element in the second layer of a draft, a layer-by-table is obtained.
  • this layer-table is TBS index
  • the column of this layer is listed as the number of available resource blocks (RBs).
  • RBs resource blocks
  • the TBS element candidate sequence there are two elements having the smallest absolute value of the difference from the aforementioned element A, respectively B and C (that is, the absolute values of the differences between B and C and A, respectively, are the smallest and the same ), then this implementation
  • the absolute values of the difference between the code rate corresponding to the element B and the element C and the target code rate of the line of the element A are compared, and the element having the smaller absolute value of the difference is selected.
  • the corresponding element of element A fill in the position of element A.
  • the method for calculating the code rate of each element is the same as the prior art.
  • the CRC bits need to be calculated as information bits, and details are not described herein.
  • the candidate from the TBS element An element in the sequence whose element number is one less than the element number of the element is taken as an element at the position.
  • a code rate threshold may be preset, for example, 0.93.
  • the elements of the last row are also calculated.
  • the code rate if the code rate of an element is greater than the foregoing rate threshold, that is, 0.93, an element whose element number is one less than the element number of the element is selected from the TBS element candidate sequence as an element at the position.
  • the code rate corresponding to the element D is greater than 0.93, and the sequence number of the element D in the TBS element candidate sequence is d, then the sequence number of the TBS element candidate sequence is selected as d-1.
  • the element acts as an element at the corresponding position of element D.
  • the method for calculating the code rate of each element is the same as the prior art.
  • the CRC bits need to be calculated as information bits, and details are not described herein.
  • the elements of the layer one table are also adjusted.
  • the seventh element of the first column (the number of available RBs is 1) of the layer one table is changed to 328; If the number of available resources per resource block (RB) is 136 resource particles (RE), then the 3-7th element of the first column (the number of available RBs is 1) of the layer one table is substituted for the column in order. The 2-6th element, and the 7th element of the column is changed to 328.
  • the generated table may be in the same situation, that is, in the same column of the layer one table, different TBS indexes (I TBS ) correspond to the same element, in order to increase the flexibility of scheduling, to avoid this situation, Also adjust the elements of the layer one table.
  • TBS index is smaller.
  • the element uses an element of the candidate sequence that is one less than the element number Instead. Then check whether there are two elements in the column with different TBS indexes but the same value. Repeat the above steps until each TBS index in the column corresponds to a different element.
  • a layer-one table of the TBS table applicable to the new carrier type can be determined.
  • the following table is a new TBS table produced by the embodiment of the present invention when the number of available resources per RB is 144 RE.
  • TBS cable NPRB (can use RB number)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS cable N PRB (number of available RBs)
  • TBS table is for illustrative purposes only, and the embodiments of the present invention are not limited thereto.
  • the following TBS elements are included in the TBS table of the present embodiment, and the following TBS elements are kept as close as possible to the frequencies appearing in the new and old tables. These elements include: 16, 24, 40, 56, 72, 104, 120, 144, 152, 176, 208, 224, 256, 296, 328, 344, 392, 440, 488, 504, 536, 568. This embodiment adjusts the above elements such that the frequency of occurrence of these elements in the layer-one table is close to the standard TBS table.
  • the following table is a comparison table of the number of occurrences of the above elements in the standard TBS table and the number of occurrences in the TBS table of the embodiment of the present invention when the number of available resources per RB is 144 RE:
  • the following table is a comparison table of the number of occurrences of the above elements in the standard TBS table and the number of occurrences in the TBS table of the embodiment of the present invention when the number of available resources per RB is 136 RE:
  • the present invention does not limit the specific adjustment method, for example, when the element '120' appears twice in the standard TBS table, and 6 times in the TBS table of the present invention without the above adjustment, If the element appears too high in the new table and needs to be adjusted, you can keep 2 or 3 '120' elements in the new table, and replace the element with the element '120' before/after the other position, for example Replace the other location with 104/144. Among them, in the specific adjustment process, we should try to avoid the same elements appearing in the same column, as mentioned above.
  • the first ten columns of the TBS table may include the following elements:
  • TBS cable NPRB ( ⁇ RB number)
  • the first ten columns of the TBS table may include The following elements:
  • each element in the layer two table in the predetermined TBS table may pass through FIG. 3
  • Step 301 Extract elements of columns 56-110 in the layer one table
  • Step 302 Select, from the candidate sequences, an element having the smallest absolute value of the difference between the extracted elements and the element value of each element to generate a layer two table.
  • the method of using the layer two table is consistent with the existing standards. That is, when the transmission layer is Layer 2, it is assumed that the number of available RBs is N. If N is less than or equal to 55, the elements corresponding to the corresponding TBS index in the 2Nth column of the lookup layer table are directly used as the result of the lookup table. If N is greater than or equal to 56, the element X corresponding to the corresponding TBS index of the Nth column of the table is searched, and then X is found in the first column of the second table, and the element of the second column of the X row is read as the The results of the second lookup table.
  • the candidate sequence having the smallest absolute value is found as the layer two table in the candidate sequence.
  • the following table shows the layer two table generated according to the above layer one table when the number of available resources per RB is 144 RE.
  • the elements in the first column correspond to the elements in the layer one table, and the elements in the second column are the elements corresponding to the elements in the first column.
  • the following table shows the layer generated from the above-mentioned layer-one table for each RB water RE.
  • the first column is ⁇
  • each element in the layer three table in the predetermined TBS table can be determined by the method shown in FIG. 4. Referring to FIG. 4, the method includes:
  • Step 401 Extract elements of columns 37-110 in the layer one table
  • Step 402 Select, from the candidate sequences, an element having the smallest absolute value of the difference of three times the extracted elements as an element value of each element, to generate a layer three table.
  • the method of using the layer three table is consistent with the existing standards. That is, when the transmission layer is three layers, it is assumed that the number of available RBs is N. If N is less than or equal to 36, the element corresponding to the corresponding TBS index of the 3N column of the search layer 1 is directly used as the result of the lookup table. If N is greater than or equal to 37, the element X corresponding to the corresponding TBS index of the Nth column of the table is searched, and then X is found in the first column of the third table, and the element of the second column of the X row is read as the current time. Check the results of the table.
  • the candidate sequence with the smallest absolute value difference is found in the candidate sequence as the layer three table based on the three times the size of the extracted element sequence.
  • the following table shows the layer three table generated from the above layer one table when the number of available resources per RB is 144 RE.
  • the elements in the first column correspond to the elements in the layer one table, and the elements in the second column are the elements corresponding to the elements in the first column.
  • each element in the layer four table in the predetermined TBS table can be determined by the method shown in FIG. 5. Referring to FIG. 5, the method includes:
  • Step 501 Extract elements of columns 28-110 in the layer one table
  • Step 502 Select, from the candidate sequences, an element having the smallest absolute value of the difference of 4 times of each extracted element as an element value of each element, and generate a layer four table.
  • the method of using the layer four table is consistent with the existing standards. That is, when the transmission layer is four layers, it is assumed that the number of available RBs is N. If N is less than or equal to 27, the element corresponding to the corresponding TBS index of the 4Nth column of the search layer 1 is directly used as the result of the lookup table. If N is greater than or equal to 28, the element X corresponding to the corresponding TBS index of the Nth column of the table is searched, and then X is searched for in the first column of the fourth table, and the element of the second column of the X row is read as the current time. Check the results of the table.
  • the candidate sequence with the smallest absolute value difference is found in the candidate sequence as the layer four table.
  • the method includes: Step 601: determining an initial value of a new element according to an element S that does not find a suitable candidate;
  • the element S which does not find a suitable candidate S means that, from the 28th to the 110th columns of the layer one table, no suitable candidate element is found.
  • the initial value of this new element is 4 times S, which is 4S.
  • Step 602 Calculate two block numbers BLId and BLK 2 of the initial value of the new element by using the upper rounding and the bottom rounding method respectively according to the following formula :
  • Step 603 Find the size of the coding block corresponding to BLK 2 , that is, find and +24
  • Step 604 Calculate two candidate values of the new element according to the interleaver according to the following formula
  • two candidate values for obtaining the new element can be calculated by using the above formula.
  • Step 605 Select a larger value in S1 and S2 that satisfies the preset target padding rate as a new element.
  • the target fill rate can be 4%, that is, if ⁇ 1 ⁇ 2 ⁇ ⁇ 4%, then max ⁇ A) is used as max(5' 1 , 1 S' 2 )
  • ⁇ is the value of the element that is one less than the sequence number of the above new element.
  • 4% is the target padding rate set in this embodiment, but this embodiment is not limited thereto.
  • the following table shows the four-layer four-layer table generated from the above-mentioned layer-one table when the number of available resources per RB is 144 RE.
  • the elements in the first column correspond to the elements in the layer one table, and the elements in the second column are the elements corresponding to the elements in the first column.
  • elements 305976, 314888, 324336, 336576, and 348816 are new elements added by the method of FIG. 6.
  • the following table shows the four-layer four-layer table generated from the above-mentioned layer-one table when the number of available resources per RB is 136 RE.
  • the elements in the first column correspond to the elements in the layer one table, and the elements in the second column are the elements corresponding to the elements in the first column.
  • elements 305976, 314888, and 324336 are new elements added by the method of FIG. 6.
  • the data transmission control method of the present invention expands the resources available for transmitting data in each resource block by using a new TBS table in the data transmission process, thereby improving data transmission efficiency.
  • the new TBS table reuses the TBS element in the existing form (the TBS form used in the current standard, which is referred to as a standard TBS form in the embodiment of the present invention)
  • the inconvenience of the high-level configuration information is reduced.
  • the new TBS table basically retains the TBS elements for MAC signaling transmission and VoIP service, the normal transmission of MAC signaling and the normal development of VoIP services are ensured.
  • the embodiment of the present invention further provides a data transmission control method, which is similar to the method of Embodiment 1, except that the predetermined method used by the method of the embodiment is compared with the data transmission control method of Embodiment 1.
  • the layer-table in the TBS table is determined by the method shown in FIG. 7. Referring to FIG. 7, the method includes: Step 701: Extract all TBS elements in the standard TBS table to generate a TBS element candidate sequence; Step 702: Each of the extracted elements is multiplied by a predetermined value, and a candidate sequence having the smallest absolute value of the difference is searched for from the TBS element candidate sequence as a layer-one table.
  • the predetermined value is 144/120; for the case where the available resources of each RB is 136 REs, the predetermined value is 136/120.
  • the TBS element mentioned in Embodiment 1 for supporting MAC signaling transmission and VoIP service remains unchanged.
  • the method for determining the layer two table, the layer three table, and the layer four table in the predetermined TBS table is the same as that in the first embodiment, and details are not described herein again.
  • the method of this embodiment expands the resources available for transmitting data in each resource block by using a new TBS table in the data transmission process, thereby improving data transmission efficiency.
  • the embodiment of the present invention further provides a user equipment, as described in the following Embodiment 3. Since the principle of the user equipment is similar to that of the first embodiment, the specific implementation may refer to the method of Embodiment 1. Implementation, repetition will not be repeated.
  • the embodiment of the present invention further provides a user equipment (UE), and FIG. 8 is a schematic diagram of the composition of the UE.
  • the UE includes:
  • the receiving unit 81 receives the number of RBs and the MCS index sent by the base station for data transmission, and the query unit 82 uses the MCS index to determine the relationship between the modulation and the TBS index by using the MCS index.
  • the TBS index by using the RB number and the TBS index, determining a number of information bits for data transmission by querying a predetermined TBS table, thereby correctly encoding or decoding the data;
  • a storage unit 83 configured to store the modulation and TBS index relationship table and the predetermined TBS table; wherein, the layer-one table in the predetermined TBS table includes information corresponding to each available RB number of each TBS index Number of bits
  • each element in the layer-one table in the predetermined TBS table is determined by: extracting all TBS elements in the standard TBS table to generate a TBS element candidate sequence; according to the code rate of the standard TBS table a modulation mode and a number of available resource particles per resource block, and calculating a number of information bits containing CRC bits corresponding to each TBS index and each available RB number, to generate a first layer of a table draft;
  • the behavior of the first layer, the draft of the first layer, the draft of the second layer, the draft of the first layer, the draft of the first layer, the draft of the second layer, and the list of the first layer are available RBs.
  • the one is selected according to the code rate of the two elements.
  • the row of the element An element having a smaller absolute value of the difference of the target bit rate as an element at the position of the one element in the layer-one table;
  • an element having a code rate greater than a predetermined code rate of the line in the element of the last row of the layer-table an element whose element number is one smaller than the element number of the element is selected from the TBS element candidate sequence.
  • the element with the smaller TBS index is replaced by the element of the candidate sequence that is smaller than the element number, wherein , the two elements do not contain the element with the value 328 in the first column;
  • the following elements in the layer-one table are adjusted such that the frequency of occurrence of these elements in the layer-table is close to the standard TBS table: 16, 24, 40, 56, 72, 104, 120, 144 , 152, 176, 208, 224, 256, 296, 328, 344, 392, 440, 488, 504, 536, 568.
  • each element in the layer two table in the predetermined TBS table is determined by: extracting elements of columns 56-110 in the layer one table;
  • An element having the smallest absolute value of the difference of two times the extracted elements is selected from the candidate sequences as the element value of each element, and a layer two table is generated.
  • each element in the layer three table in the predetermined TBS table is determined by: extracting elements of columns 37-110 in the layer one table;
  • An element having the smallest absolute value of the difference of three times the extracted elements is selected from the candidate sequences as the element value of each element, and a layer three table is generated.
  • each element in the layer four table in the predetermined TBS table is determined by: extracting elements of columns 28-110 in the layer one table;
  • An element having the smallest absolute value of the difference of four times the extracted elements is selected from the candidate sequences as the element value of each element, and a layer four table is generated.
  • the two block numbers BLId and BLK 2 of the initial value of the new element are calculated by the upper rounding and the lower rounding respectively :
  • BLK ⁇ BLK 2 calculates the values of the two candidate elements of the new element according to the interleaver using the following formula:
  • ⁇ is the value of the element that is one less than the sequence number of the above new element.
  • the UE of this embodiment expands the resources available for transmitting data in each resource block by using a new TBS table in the data transmission process, thereby improving data transmission efficiency.
  • FIG. 9 is a flow chart of the method, please refer to Figure 9, the method includes:
  • Step 901 The number of information bits to be downlinked to the UE by the base station, the number of information bits to be uploaded on the UE side, the current resource allocation, the channel link quality between the UE and the base station, the modulation and TBS index relationship table, and the TBS table. Selecting, for the UE, a number of RBs for performing data transmission and an MCS index;
  • the base station sends downlink data to the UE
  • the number of information bits of the downlink data to be downlinked to the UE the current resource allocation, the channel link quality between the UE and the base station, and the modulation and TBS index relationship table.
  • the TBS table selects the number of RBs for the downlink data transmission and the MCS cable for the UE.
  • Step 902 The base station sends the number of RBs and the MCS index to the UE, so that the UE is configured according to the UE. Determining, by the MCS index, the TBS index by combining the modulation and TBS index relationship table, and determining the number of information bits of the current uplink transmission or the downlink transmission according to the RB number and the TBS index according to the predetermined TBS table, and then correctly encoding or decoding. The data.
  • the method further includes:
  • Step 903 After receiving the uplink data sent by the UE, the base station searches the modulation and TBS index relationship table according to the MCS index, and determines a TBS index.
  • Step 904 The base station searches the TBS table according to the RB number and the TBS index, and determines the number of information bits of the received uplink data.
  • Step 905 The base station demodulates and decodes the received uplink data according to the information bit number.
  • the base station After the base station learns that the UE has uplink data to be transmitted, the base station refers to the number of information bits to be transmitted, the current resource allocation, and the channel link quality between the current UE and the base station, and refers to the relationship between modulation and TBS index.
  • the table and TBS table select the size (RB number) of the transmission resource block and the MCS index for the UE, and notify the UE of relevant information (such as resource block size and location and MCS index used in transmission) before actually performing line data transmission.
  • the UE determines the TBS index by checking the modulation and TBS index relationship table according to the MCS index indicated by the base station, and determines the information bit size of the transmission by checking the TBS table according to the RB number and the TBS index (wherein, the information bits in the cache of the UE)
  • the UE does not necessarily read the corresponding number of information bits, and then the UE reads the corresponding number of information bits from the buffer, and then encodes and modulates the information bits to be transmitted according to the corresponding MCS index, and performs uplink transmission on the time and frequency resources specified by the base station.
  • the base station After receiving the uplink data sent by the UE, the base station checks the size of the information bits transmitted from the TBS table according to the agreed TBS index, and demodulates and decodes the received data accordingly.
  • the base station When the base station sends the downlink data to the UE, the base station firstly determines, according to the number of information bits of the downlink data, the current resource allocation, the channel link quality between the UE and the base station, the modulation and TBS index relationship table, and the TBS table.
  • the UE selects the number of RBs for performing the foregoing downlink data transmission and the MCS index, and then the base station sends the RB number and the MCS index to the UE, so that the UE combines the modulation and the TBS index according to the MCS index.
  • the relationship table determines the TBS index, and determines the number of information bits of the downlink data according to the RB number and the TBS index in combination with the predetermined TBS table, thereby correctly decoding the data.
  • the TBS table that the base station searches for is the same as the TBS that the UE searches for.
  • the specific content of the TBS table has been described in detail in Embodiment 1, and the content thereof is incorporated herein, and details are not described herein again.
  • the base station uses a new TBS table in the data transmission process, and expands resources available for transmitting data in each resource block, thereby improving data transmission efficiency.
  • the embodiment of the present invention further provides a base station, as described in the following embodiment 5.
  • the principle of the problem solved by the base station is similar to the method of the fourth embodiment. Therefore, the specific implementation may refer to the implementation of the method in the fourth embodiment. The repetitions are not repeated here.
  • FIG. 10 is a schematic diagram of the composition of the base station.
  • the base station includes:
  • the selecting unit 1001 is configured according to the number of information bits to be downlinked to the UE, the number of information bits to be uploaded on the UE side, the current resource allocation, the channel link quality between the UE and the base station, the modulation and TBS index relationship table, and the predetermined
  • the TBS table selects the number of RBs for the data transmission and the MCS index for the UE; the sending unit 1002 sends the RB number and the MCS index to the UE, so that the UE combines modulation and modulation according to the MCS index.
  • the TBS index relationship table determines a TBS index, and determines the number of information bits of the current uplink transmission or the downlink transmission according to the RB number and the TBS index in combination with the foregoing predetermined TBS table, thereby correctly encoding or decoding the data;
  • the storage unit 1003 stores the modulation and TBS index relation table and the predetermined TBS table.
  • the method and content of the TBS table stored in the storage unit 1003 are the same as those in the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
  • the base station further includes:
  • a first searching unit 1004 after receiving the uplink data sent by the UE, searching for a modulation and TBS index relationship table according to the MCS index, and determining a TBS index;
  • the second searching unit 1005 searches for a TBS table according to the TBS index, and determines the number of information bits of the received uplink data.
  • the processing unit 1006 performs demodulation and decoding on the received uplink data according to the number of information bits.
  • the base station uses a new TBS table in the data transmission process, and expands resources available for transmitting data in each resource block, thereby improving data transmission efficiency.
  • the embodiment of the present invention further provides a communication system, which includes the user equipment described in Embodiment 3 and the base station described in Embodiment 5, and the content thereof is incorporated herein, and details are not described herein again.
  • An embodiment of the present invention further provides a computer readable program, wherein the program is executed in a terminal device
  • the program causes the computer to execute the data transmission control method described in Embodiment 1 or Embodiment 2 in the terminal device.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the data transmission control method described in Embodiment 1 or 2 in the terminal device.
  • the embodiment of the present invention also provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the data transmission control method described in Embodiment 4 in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the data transmission control method described in Embodiment 4 in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé et un dispositif de commande de transmission de données. Le procédé comprend les étapes au cours desquelles : un équipement utilisateur (UE) reçoit le nombre de blocs de ressources (RB) et un index de schéma de modulation et de codage (MCS) qui sont utilisés pour une transmission de données et envoyés par une station de base ; l'UE utilise l'index MCS pour interroger une table de liaisons de modulation et d'index des tailles des blocs de transport (TBS) et pour déterminer un index TBS, et ; l'UE utilise le nombre de RB et l'index TBS pour interroger une table TBS prédéfinie et pour déterminer le nombre de bits d'informations d'une transmission de données, ce qui code ou décode correctement les données. Le procédé comprend également les étapes consistant à : extraire tous les éléments TBS dans une table TBS standard de façon à créer une séquence candidate d'éléments TBS ; calculer le nombre de bits dans les informations qui contiennent des bits de contrôle par redondance cyclique (CRC) sur la base d'un débit binaire, d'un mode de modulation de la table TBS standard et du nombre de ressources (Res) disponibles de chaque RB, puis créer une première ébauche de table de première couche ; supprimer les bits CRC de la première ébauche de table de première couche et créer une seconde ébauche de table de première couche, et ; parcourir chaque élément dans la seconde ébauche de table de première couche, sélectionner parmi chaque élément un élément dont la valeur absolue de l'ajournement est la plus petite dans la séquence candidate, remplir chaque position d'élément avec l'élément sélectionné et créer une table de première couche.
PCT/CN2012/082547 2012-10-08 2012-10-08 Procédé et dispositif de commande de transmission de données WO2014056131A1 (fr)

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CN111294149A (zh) * 2019-06-20 2020-06-16 展讯通信（上海）有限公司 发送、接收方法及装置、存储介质、终端、基站

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