CN101931501B - A kind of method determining transport block size and device - Google Patents
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Abstract
The invention discloses a kind of method determining transport block size and device.In the present invention program, it is judged that whether the Resource Block quantity distributing to subscriber equipment exceedes threshold value, if not less than, then will according to ITBSWith NPRBThe numerical value determined of corresponding relation directly as with 3 layers or the 4 layers transport block size launched；If it does, to according to ITBSWith NPRBThe numerical value determined of corresponding relation carry out being converted to 3 layers or the 4 layers transport block size launched；Wherein, ITBSThe index of the transport block size of subscriber equipment, N is distributed to for base stationPRBThe Resource Block quantity of subscriber equipment is distributed to for base station.According to scheme provided by the invention, it is possible to determine with 3 layers or the 4 layers transport block size launched in LTE-Advanced mobile communication system, thus obtaining higher power system capacity, and completely compatible with existing system.
Description
Technical Field
The invention relates to the field of calculation of the size of a transmission block during downlink multi-layer transmission in an Advanced long term evolution (LTE-Advanced) mobile communication system, in particular to a method and a device for determining the size of the transmission block during 3-layer or 4-layer transmission of a Physical Downlink Shared Channel (PDSCH) in an LTE-Advanced physical layer by Multiple-input Multiple-output (MIMO).
Background
LTE-Advanced extends The current 4 x 4MIMO to 8 x 8MIMO according to The technical report TR36.814V9.0.0 ("fundamentals paging") of The third generation mobile communication partnership project (3 GPP), which is The3 rd-general partnership project ("3 GPP"), section 7.2, "downlink paging for e-utra anhysicaliyerascopies"), and one codeword, i.e., a transport block, can be transmitted at most in 4 layers.
According to section 7.1.7.2.2 of 3GPPTS36.213V9.2.0, 3GPP defines a method for determining the size of a transport block when one codeword is transmitted in layer 2. However, at present, 3GPP has not determined how the transport block size is determined when a codeword is transmitted at layer 3 or layer 4.
In order to enable the LTE-Advanced mobile communication system to support 8 × 8MIMO and support transmission of one codeword at 3 layers or 4 layers, a scheme for determining the transport block size of one codeword at the time of transmission at 3 layers or 4 layers is required, but no clear implementation is available at present.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for determining a transport block size, which can determine a transport block size transmitted in 3-layer or 4-layer.
In order to solve the technical problem, the technical scheme of the invention is realized as follows:
a method of determining a transport block size, when transmitting in 3 or 4 layers, the method comprising: judging whether the number of resource blocks allocated to the user equipment exceeds a threshold value or not, and if not, judging whether the number of resource blocks allocated to the user equipment exceeds the threshold value or notIf it exceeds, it will be according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by a 3-layer or 4-layer; if so, forTBSAnd NPRBConverting the numerical value determined by the corresponding relation to obtain the size of a transmission block transmitted by a 3-layer or 4-layer transmission; wherein, ITBSIndex of transport block size, N, allocated to user equipment for base stationPRBThe number of resource blocks allocated to the user equipment for the base station.
When transmitting in 3 layers, the said will be according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by a 3-layer, and specifically comprises the following steps: press entry point (I)TBS，3·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the obtained numerical value as the size of a transmission block transmitted by a 3-layer; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 3 to obtain the size of a transmission block transmitted by 3 layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation of the obtained numerical value and the press-in port point (I)TBS，2·NPRB) In ITBSAnd NPRBThe sum of the values found in the corresponding relationship of (a) is taken as the size of the transmission block transmitted by 3 layers.
When transmitting in 3 layers, the pair is according to ITBSAnd NPRBThe value determined by the corresponding relation is converted to obtain the size of the transmission block transmitted by 3 layers, and the method specifically comprises the following steps: first press the entry point (I)TBS，NPRB) In ITBSAnd NPRBThe obtained numerical value is used as the size of a transmission block of one layer, and then the size of a transmission block transmitted by 3 layers is determined according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of three layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 3 to obtain the size of a transmission block transmitted by 3 layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBAnd searching the corresponding relation, and taking the sum of the obtained numerical value and the size of the transmission block of the two layers corresponding to the numerical value in the corresponding relation between the size of the transmission block of the one layer and the size of the transmission block of the two layers as the size of the transmission block transmitted by the3 layers.
When transmitting in 4 layers, the said will be according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by 4 layers, and specifically comprises the following steps: press entry point (I)TBS，4·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the obtained numerical value as the size of a transmission block transmitted by 4 layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 4 to obtain the size of a transmission block transmitted by 4 layers; or, press the entry point (I)TBS，2·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 2 to obtain the size of a transmission block transmitted by 4 layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation of the obtained numerical value and the press-in port point (I)TBS，3·NPRB) In ITBSAnd NPRBThe sum of the values found in the corresponding relationship of (a) is taken as the size of the transmission block transmitted by 4 layers.
When transmitting in 4 layers, the pair is according to ITBSAnd NPRBThe value determined by the corresponding relation is converted to obtain the size of the transmission block transmitted by 4 layers, and the method specifically comprises the following steps: first press the entry point (I)TBS，NPRB)In ITBSAnd NPRBThe obtained numerical value is used as the size of a transmission block of one layer, and then the size of a transmission block transmitted by 4 layers is determined according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of four layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 4 to obtain the size of a transmission block transmitted by 4 layers; or, press the entry point (I)TBS，NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the sum of the obtained numerical value and the size of the transmission block of the three layers corresponding to the numerical value in the corresponding relation between the size of the transmission block of the first layer and the size of the transmission block of the second layer as the size of the transmission block transmitted by the 4 layers; alternatively, press the entry point (I) firstTBS，NPRB) In ITBSAnd NPRBThe corresponding relation of the transmission block size of the first layer and the transmission block size of the second layer is searched to obtain a numerical value, then the transmission block size of the double layer corresponding to the numerical value in the corresponding relation of the transmission block size of the first layer and the transmission block size of the second layer is searched, and the transmission block size of the double layer is multiplied by 2 to be used as the transmission block size transmitted by the 4 layers.
The method further comprises the following steps: and after the bit data of the coding words with the transmission block size are coded into symbols, the symbols are distributed on each layer according to the number of the layers and transmitted.
The threshold is 36 for 3-layer transmission and 27 for 4-layer transmission.
An apparatus for determining a transport block size when transmitting in 3-layer or 4-layer, comprising:
a judging unit, configured to judge whether the number of resource blocks allocated to the user equipment exceeds a threshold by the base station, and provide a judgment result to the determining unit;
a determining unit for processing according to the judgment result of the judging unit, if the number of resource blocks allocated to the user equipment does not exceed the threshold value, according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by 3 layers or 4 layers, if the value exceeds a threshold value, the value is determined according to ITBSAnd NPRBThe values determined by the corresponding relations are converted to obtain the size of the transmission block transmitted by 3 layers or 4 layers.
The determination unit comprises four determination modules:
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of the resource blocks allocated to the user equipment does not exceed a threshold value, and the first determination module is used for determining the size of a transmission block transmitted in 3 layers by the code word according to one of three processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of the resource blocks allocated to the user equipment exceeds a threshold value, and the second determination module is used for determining the size of a transmission block transmitted in 3 layers of the code word according to one of other three processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers, and the number of the resource blocks allocated to the user equipment does not exceed the threshold, and the third determination module is used for determining the size of the transmission block transmitted in 4 layers by the code word according to one of four processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers, and the number of the resource blocks allocated to the user equipment exceeds the threshold value, and the fourth determination module is used for determining the size of the transmission block transmitted in 4 layers by the code word according to one of other four processing modes.
The apparatus further comprises: and the transmitting unit is used for encoding the bit data of the coding words with the transmission block size into symbols and then transmitting the symbols on each layer according to the number distribution of the layers.
According to the scheme provided by the invention, the size of a transmission block transmitted by 3 layers or 4 layers can be determined in an LTE-Advanced mobile communication system, so that higher system capacity is obtained, and the LTE-Advanced mobile communication system is completely compatible with the existing system, and further can support the transmission of code words by 3 layers or 4 layers and support 8 x 8 MIMO.
Drawings
FIG. 1 is a schematic flow chart of determining the size of a transport block when transmitting in 3-layer or 4-layer in the present invention;
FIG. 2 is a schematic diagram illustrating a specific process for determining the size of a transport block when transmitting in 3-layer or 4-layer transmission according to the present invention;
fig. 3 is a schematic structural diagram of an apparatus for determining a transport block size when transmitting in 3-layer or 4-layer in the present invention.
Detailed Description
Fig. 1 is a schematic flow chart of determining the size of a transport block when transmitting in 3 layers or 4 layers in the present invention, and as shown in fig. 1, the specific processing of determining the size of a transport block when transmitting in 3 layers or 4 layers includes:
step 101: the base station judges whether the number of resource blocks allocated to the user equipment exceeds a threshold value, if not, the step 102 is continuously executed; if so, execution continues with step 103. The threshold may be calculated according to the set maximum number of resource blocks that can be allocated to the user equipment and the number of layers.
Step 102: the base station will be according to ITBSAnd NPRBDirectly as the size of the transport block transmitted in 3 or 4 layers, and then the process can further continue to step 104. Wherein, ITBSIndex of transport block size, N, allocated to user equipment for base stationPRBThe number of resource blocks allocated to the user equipment for the base station.
Step 103: base station pair is according to ITBSAnd NPRBThe determined value of the corresponding relation is converted to obtain the size of the transmission block transmitted in 3 layers or 4 layers, and then the step 104 can be further continued. Wherein, ITBSIndex of transport block size, N, allocated to user equipment for base stationPRRThe number of resource blocks allocated to the user equipment for the base station.
Step 104: the base station encodes the bit data of the coding words with the corresponding transmission block size into symbols and transmits the symbols on each layer according to the number distribution of the layers.
Fig. 2 is a schematic diagram of a specific flow of determining the size of a transport block when transmitting in 3 layers or 4 layers, and as shown in fig. 2, the specific processing for determining the size of a transport block when transmitting in 3 layers or 4 layers includes:
step 201: the base station checks whether the code word of a certain user equipment is transmitted in 3 layers or 4 layers, if so, the step 202 is continuously executed; if not, execution continues with step 209.
Step 202: the base station checks whether the codeword is transmitted in 3 layers, and if it is transmitted in 3 layers, it continues to step 203; if the transmission is not 3 layers, indicating that the transmission is 4 layers, the process continues to step 206.
Specifically, the base station may determine whether the codeword of the user equipment is transmitted at a layer 3 or 4, and specifically at a layer 3 or 4, through input information of an upper layer, such as a Media Access Control (MAC) layer.
Step 203: the base station checks whether the number of resource blocks allocated to the user equipment exceeds 36, and if not, the step 204 is continuously executed; if so, execution continues with step 205.
If the maximum number of resource blocks that the base station can allocate to the user equipment is set to 110, the threshold value 36 is obtained by dividing 110 by 3 and rounding down.
Step 204: the base station determines the transport block size of the codeword transmitted in 3 layers according to one of the following three processing manners, and then performs step 209. In practical applications, one of the following three processing manners may be configured in the base station, so that the base station determines the size of the transport block transmitted in layer 3 by using the corresponding processing manner.
Treatment modes A-I: press entry point (I)TBS，3·NPRB) Searching in a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920, and taking the obtained numerical value as the size of a transmission block transmitted by a 3-layer, wherein the table 1 is an indication of a table 7.1.7.2.1-1 of the 3GPP protocol TS 36.213-920;
TABLE 1
Treatment modes A-II: press entry point (I)TBS，NPRB) Looking up in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and multiplying the obtained value by 3 to obtain the size of a transmission block transmitted by a 3 layer;
treatment modes A-III: press entry point (I)TBS，NPRB) In ITBSAnd NPRBThe corresponding relation of (A) is searched in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and the obtained numerical value and the point of contact (I) are obtainedTBS，2·NPRB) The sum of the values found in table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 is used as the transport block size for transmission at layer 3.
Step 205: the base station determines the transport block size of the codeword transmitted at layer 3 according to one of the following three other processing manners, and then performs step 209. In practical applications, one of the following three processing manners may be configured in the base station, so that the base station determines the size of the transport block transmitted in layer 3 by using the corresponding processing manner.
Treatment modes B-I: first press the entry point (I)TBS，NPRB) Searching in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, taking the obtained numerical value as the size of a transmission block of one layer, then determining the size of the transmission block transmitted by the3 layer according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of three layers, namely searching the corresponding numerical value in a table 2 according to the numerical value obtained by searching, and taking the obtained numerical value as the size of the transmission block transmitted by the3 layer;
TABLE 2
Treatment modes B-II: press entry point (I)TBS，NPRB) Looking up in the table 7.1.7.2.1-1 of the 3GPP protocol TS36.213-920 will be obtainedMultiplying the obtained value by 3 to obtain the size of the transmission block transmitted in 3 layers;
treatment modes B to III: press entry point (I)TBS，NPRB) And (3) searching in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and taking the sum of the obtained numerical value and the size of the transmission block of the two layers corresponding to the numerical value in the corresponding relation between the size of the transmission block of the one layer and the size of the transmission block of the two layers as the size of the transmission block transmitted by the3 layer, namely taking the sum of the searched numerical value and the size of the transmission block of the two layers corresponding to the numerical value in a table 7.1.7.2.2-1 of the 3GPP protocol TS36.213-920 as the size of the transmission block transmitted by the3 layer, wherein the table 3 is an indication of 7.1.7.2.2-1 of the 3GPP protocol TS 36.213-920.
| TBS_L1 | TBS_L2 | TBS_L1 | TBS_L2 | TBS_L1 | TBS_L2 | TBS_L1 | TBS_L2 |
| 1544 | 3112 | 3752 | 7480 | 10296 | 20616 | 28336 | 57336 |
| 1608 | 3240 | 3880 | 7736 | 10680 | 21384 | 29296 | 59256 |
| 1672 | 3368 | 4008 | 7992 | 11064 | 22152 | 30576 | 61664 |
| 1736 | 3496 | 4136 | 8248 | 11448 | 22920 | 31704 | 63776 |
| 1800 | 3624 | 4264 | 8504 | 11832 | 23688 | 32856 | 66592 |
| 1864 | 3752 | 4392 | 8760 | 12216 | 24496 | 34008 | 688085 --> |
| 1928 | 3880 | 4584 | 9144 | 12576 | 25456 | 35160 | 71112 |
| 1992 | 4008 | 4776 | 9528 | 12960 | 25456 | 36696 | 73712 |
| 2024 | 4008 | 4968 | 9912 | 13536 | 27376 | 37888 | 76208 |
| 2088 | 4136 | 5160 | 10296 | 14112 | 28336 | 39232 | 78704 |
| 2152 | 4264 | 5352 | 10680 | 14688 | 29296 | 40576 | 81176 |
| 2216 | 4392 | 5544 | 11064 | 15264 | 30576 | 42368 | 84760 |
| 2280 | 4584 | 5736 | 11448 | 15840 | 31704 | 43816 | 87936 |
| 2344 | 4776 | 5992 | 11832 | 16416 | 32856 | 45352 | 90816 |
| 2408 | 4776 | 6200 | 12576 | 16992 | 34008 | 46888 | 93800 |
| 2472 | 4968 | 6456 | 12960 | 17568 | 35160 | 48936 | 97896 |
| 2536 | 5160 | 6712 | 13536 | 18336 | 36696 | 51024 | 101840 |
| 2600 | 5160 | 6968 | 14112 | 19080 | 37888 | 52752 | 105528 |
| 2664 | 5352 | 7224 | 14688 | 19848 | 39232 | 55056 | 110136 |
| 2728 | 5544 | 7480 | 14688 | 20616 | 40576 | 57336 | 115040 |
| 2792 | 5544 | 7736 | 15264 | 21384 | 42368 | 59256 | 119816 |
| 2856 | 5736 | 7992 | 15840 | 22152 | 43816 | 61664 | 124464 |
| 2984 | 5992 | 8248 | 16416 | 22920 | 45352 | 63776 | 128496 |
| 3112 | 6200 | 8504 | 16992 | 23688 | 46888 | 66592 | 133208 |
| 3240 | 6456 | 8760 | 17568 | 24496 | 48936 | 68808 | 137792 |
| 3368 | 6712 | 9144 | 18336 | 25456 | 51024 | 71112 | 142248 |
| 3496 | 6968 | 9528 | 19080 | 26416 | 52752 | 73712 | 146856 |
| 3624 | 7224 | 9912 | 19848 | 27376 | 55056 | 75376 | 149776 |
TABLE 3
Step 206: the base station checks whether the number of resource blocks allocated to the user equipment exceeds 27, and if not, the step 207 is continuously executed; if so, execution continues at step 208.
If the maximum number of resource blocks that the base station can allocate to the user equipment is set to 110, then 110 is divided by 4 and rounded down to obtain the threshold 27.
Step 207: the base station determines the transport block size of the codeword transmitted in 4 layers according to one of the following four processing manners, and then performs step 209. In practical applications, one of the following four processing manners may be configured in the base station, so that the base station determines the size of the transport block transmitted in 4 layers by using the corresponding processing manner.
Treatment mode C-I: press entry point (I)TBS，4·NPRB) Looking up in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and taking the obtained numerical value as the size of a transmission block transmitted by a layer 4;
treatment modes C-II: press entry point (I)TBS，NPRB) Looking up in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and multiplying the obtained value by 4 to obtain the size of a transmission block transmitted by a 4-layer;
treatment modes C-III: press entry point (I)TBS，2·NPRB) Looking up in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and multiplying the obtained value by 2 to obtain the size of a transmission block transmitted by a 4-layer;
treatment modes C to IV: press entry point (I)TBS，NPRB) Looking up in the table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920, the obtained value and the entry point (I)TBS，3·NPRB) The sum of the values found in table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 is used as the transport block size for transmission at layer 4.
Step 208: the base station determines the transport block size of the codeword transmitted in 4 layers according to one of the following four other processing manners, and then performs step 209. In practical applications, one of the following four processing manners may be configured in the base station, so that the base station determines the size of the transport block transmitted in 4 layers by using the corresponding processing manner.
Treatment mode D-I: first press the entry point (I)TBS，NPRB) Searching in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, taking the obtained numerical value as the size of a transmission block of one layer, then determining the size of the transmission block transmitted by the 4 layers according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of the four layers, namely searching the corresponding numerical value in the table 4 according to the numerical value obtained by searching, and taking the obtained numerical value as the size of the transmission block transmitted by the 4 layers;
TABLE 4
Treatment method D-II: press entry point (I)TBS，NPRB) Looking up in a table 7.1.7.2.1-1 of a 3GPP protocol TS36.213-920, and multiplying the obtained value by 4 to obtain the size of a transmission block transmitted by a 4-layer;
treatment modes D-III: press entry point (I)TBS，NPRB) Looking up in table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920, and taking the sum of the obtained value and the transport block size of the three layers corresponding to the value in table 2 as the transport block size transmitted by the 4 layers;
treatment modes D-IV: first press the entry point (I)TBS，NPRB) Looking up in table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 to obtain a value, looking up the corresponding double-layer transport block size of the value in table 7.1.7.2.2-1 of TS36.213-920, multiplying the double-layer transport block size by the double-layer transport block sizeWith 2 as the transport block size transmitted in 4 layers.
Step 209: the base station encodes the bit data of the coding words with the corresponding transmission block size into symbols and transmits the symbols on each layer according to the number distribution of the layers.
Specifically, the base station may transmit the encoded symbols evenly distributed on each layer, or may transmit the encoded symbols not evenly distributed on each layer, for example, there are fewer symbols in a 1-layer or 2-layer distribution, and there are relatively more symbols in a 3-layer or 3-layer and 4-layer distribution.
Above-mentioned ITBSIndex of transport block size, N, allocated to user equipment for base stationPRBThe number of resource blocks allocated to the user equipment for the base station; the above-mentioned table 7.1.7.2.1-1 of the 3GPP protocol TS36.213-920 is ITBSAnd NPRBThe corresponding relationship of (1).
Fig. 3 is a schematic structural diagram of an apparatus for determining a transport block size when transmitting in 3 layers or 4 layers according to the present invention, as shown in fig. 3, the apparatus includes: a judging unit and a determining unit. The judging unit is used for judging whether the number of the resource blocks distributed to the user equipment exceeds a threshold value or not by the base station and providing a judging result to the determining unit; the determining unit is used for processing according to the judgment result of the judging unit, and if the number of the resource blocks distributed to the user equipment does not exceed the threshold value, the determining unit is used for processing according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by 3 layers or 4 layers, if the value exceeds a threshold value, the value is determined according to ITBSAnd NPRBThe values determined by the corresponding relations are converted to obtain the size of the transmission block transmitted by 3 layers or 4 layers.
The apparatus further comprises: and the transmitting unit is used for encoding the bit data of the coding words with the corresponding transmission block size into symbols and then transmitting the symbols on each layer according to the number distribution of the layers.
Specifically, the determination unit includes four determination modules: a first determination module, a second determination module, a third determination module, and a fourth determination module, wherein,
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of resource blocks allocated to the user equipment does not exceed a threshold, and the first determination module is used for determining the size of a transmission block transmitted by the code word in 3 layers according to one of the processing modes A-I, A-II and A-III;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of the resource blocks allocated to the user equipment exceeds the threshold value, the second determination module is used for determining the size of the transmission block transmitted by the code word in 3 layers according to one of the processing modes B-I, B-II and B-III;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers and the number of resource blocks allocated to the user equipment does not exceed the threshold, and the third determination module is used for determining the size of a transmission block transmitted in 4 layers of the code word according to one of the processing modes C-I, C-II, C-III and C-IV;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers, and the number of resource blocks allocated to the user equipment exceeds the threshold, and the fourth determination module is used for determining the size of the transport block transmitted in 4 layers by the code word according to one of the processing modes D-I, D-II, D-III and D-IV.
The following further describes the embodiments of the present invention in detail by way of specific examples.
Detailed description of the preferred embodiment
In this example, the code word of a certain user equipment needs to be transmitted in 3 layers, and the base station allocates an index I of the transport block size of the user equipmentTBS15, the number of resource blocks N allocated to the user equipmentPRB48, and the configuration in the base station is: and when the transmission is carried out in 3 layers, the number of resource blocks allocated to the user equipment exceeds a threshold value, and the processing is carried out according to a processing mode B-I. The determination of the transport block size transmitted in 3 layers is as follows: the base station checks that the code word of the user equipment is transmitted in 3 layers and is allocated to the user equipmentIf the number of resource blocks exceeds 36, the base station looks up in a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 according to the entry point (15, 48) to obtain a value 14688 bits, and then looks up the corresponding value 44064 bits in table 2 according to the value "14688" as the transport block size of one layer, to obtain the transport block size 44064 bits transmitted by the3 layers. Subsequently, the base station encodes the bit data of the 44064-bit code word into symbols and transmits the symbols distributed on 3 layers.
Therefore, the scheme provided by the invention can determine the size of the transport block transmitted in the 3-layer in the LTE-Advanced mobile communication system, thereby obtaining higher system capacity and being completely compatible with the existing system.
Specific example II
In this example, the code word of a certain user equipment needs to be transmitted in 4 layers, and the base station allocates an index I of the transport block size of the user equipmentTBS26, the number of resource blocks N allocated to the user equipmentPRB100 and the configuration in the base station is: and when the transmission is carried out by 4 layers, the number of resource blocks distributed to the user equipment exceeds a threshold value and the processing is carried out according to a processing mode D-I. The determination of the transport block size transmitted in 4 layers is as follows: when the base station detects that the code word of the user equipment is transmitted in 4 layers and the number of resource blocks allocated to the user equipment exceeds 27, the base station searches in a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 according to an inlet point (26, 100) to obtain a value of 75376 bits, then searches a corresponding value of 301520 bits in a table 4 according to the value of "75376" as the size of a transport block of one layer, and obtains the size of a transport block transmitted in 4 layers of 301520 bits. Subsequently, the base station encodes the bit data of the 301520-bit code word into symbols and transmits the symbols distributed over 4 layers.
Therefore, the scheme provided by the invention can determine the size of the transport block transmitted in 4 layers in the LTE-Advanced mobile communication system, thereby obtaining higher system capacity and being completely compatible with the existing system.
Specific example III
In this example, the code word of a certain user equipment needs to be transmitted in 4 layers, and the base station allocates an index I of the transport block size of the user equipmentTBS9, the number of resource blocks N allocated to the user equipmentPRB32 and the configuration in the base station is: and when the transmission is carried out by 4 layers, the number of resource blocks distributed to the user equipment exceeds a threshold value, and the processing is carried out according to a processing mode D-II. The determination of the transport block size transmitted in 4 layers is as follows: when the base station detects that the code word of the user equipment is transmitted in 4 layers and the number of resource blocks allocated to the user equipment exceeds 27, the base station searches in a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 according to an entry point (9, 32) to obtain a value of 5160 bits, and then multiplies the value of 5160 by 4 to obtain a transport block size of 20640 bits transmitted in 4 layers. Subsequently, the base station encodes the bit data of the 20640-bit code word into symbols and transmits the symbols distributed over 4 layers.
Therefore, the scheme provided by the invention can determine the size of the transport block transmitted in 4 layers in the LTE-Advanced mobile communication system, thereby obtaining higher system capacity and being completely compatible with the existing system.
Specific example No. four
In this example, the code word of a certain user equipment needs to be transmitted in 3 layers, and the base station allocates an index I of the transport block size of the user equipmentTBS25, the number of resource blocks N allocated to the user equipmentPRBWhen the base station checks that the code word of the user equipment is transmitted in the3 layer and the number of the resource blocks allocated to the user equipment does not exceed 36, the base station searches a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 by an entry point (25, 5) to obtain a value 3112 bits, then searches a table 7.1.7.2.1-1 of 3GPP protocol TS36.213-920 by an entry point (25, 2 × 5) to obtain a value 6200 bits, sums the values "3112" and "6200" to obtain 9312, and then obtains a transmission transmitted in the3 layer by the base station which is configured to process A-III in a processing mode when the number of the resource blocks allocated to the user equipment is transmitted in the3 layerThe block size is 9312 bits. Subsequently, the base station encodes the bit data of the 9312 bit code word into symbols and transmits the symbols distributed over 3 layers.
Therefore, the scheme provided by the invention can determine the size of the transport block transmitted in the 3-layer in the LTE-Advanced mobile communication system, thereby obtaining higher system capacity and being completely compatible with the existing system.
The foregoing detailed description of the principles of the present invention has been presented for purposes of illustration and description, and is not intended to limit the scope of the invention. Also, various possible equivalent changes or substitutions may be made in accordance with the technical solution of the present invention and the description of the preferred embodiment thereof, and all such changes or substitutions shall fall within the scope of the claims of the present invention.
Claims (5)
1. A method of determining transport block size, when transmitting in 3-layer or 4-layer, the method comprising:
determining whether the number of resource blocks allocated to the user equipment exceeds a threshold,
if not, it will be according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by a 3-layer or 4-layer;
if so, forTBSAnd NPRBThe value determined by the corresponding relation is converted to obtain the data transmitted by 3 layers or 4 layersA transmission block size of the fire;
wherein, ITBSIndex of transport block size, N, allocated to user equipment for base stationPRBThe number of resource blocks allocated to the user equipment for the base station;
wherein, when transmitting in 3 layers, the transmission is according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by a 3-layer, and specifically comprises the following steps:
press entry point (I)TBS,3·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the obtained numerical value as the size of a transmission block transmitted by a 3-layer; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 3 to obtain the size of a transmission block transmitted by 3 layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation of the obtained numerical value and the press-in port point (I)TBS,2·NPRB) In ITBSAnd NPRBThe sum of the values found in the corresponding relation is used as the size of a transmission block transmitted by 3 layers;
wherein, when transmitting in 3 layers, the pair is according to ITBSAnd NPRBThe value determined by the corresponding relation is converted to obtain the size of the transmission block transmitted by 3 layers, and the method specifically comprises the following steps:
first press the entry point (I)TBS,NPRB) In ITBSAnd NPRBThe obtained numerical value is used as the size of a transmission block of one layer, and then the size of a transmission block transmitted by 3 layers is determined according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of three layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 3 to obtain the size of a transmission block transmitted by 3 layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBIs searched in the corresponding relation of (2), the obtained number is obtainedThe sum of the value and the transmission block size of the two layers corresponding to the numerical value in the corresponding relation of the transmission block size of the one layer and the transmission block size of the two layers is used as the transmission block size transmitted by the3 layers;
wherein, when transmitting in 4 layers, the transmission is according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by 4 layers, and specifically comprises the following steps:
press entry point (I)TBS,4·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the obtained numerical value as the size of a transmission block transmitted by 4 layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 4 to obtain the size of a transmission block transmitted by 4 layers; or,
press entry point (I)TBS,2·NPRB) In ITBSAnd NPRBSearching the corresponding relation, and multiplying the obtained numerical value by 2 to obtain the size of a transmission block transmitted by 4 layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation of the obtained numerical value and the press-in port point (I)TBS,3·NPRB) In ITBSAnd NPRBThe sum of the values found in the corresponding relation is used as the size of a transmission block transmitted by 4 layers;
wherein, when transmitting in 4 layers, the pair is according to ITBSAnd NPRBThe value determined by the corresponding relation is converted to obtain the size of the transmission block transmitted by 4 layers, and the method specifically comprises the following steps:
first press the entry point (I)TBS,NPRB) In ITBSAnd NPRBThe obtained numerical value is used as the size of a transmission block of one layer, and then the size of a transmission block transmitted by 4 layers is determined according to the corresponding relation between the size of the transmission block of one layer and the size of the transmission block of four layers; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBIs searched, and the obtained value is multiplied by 4 to be used as the transmission transmitted by 4 layersA block size; or,
press entry point (I)TBS,NPRB) In ITBSAnd NPRBSearching the corresponding relation, and taking the sum of the obtained numerical value and the size of the transmission block of the three layers corresponding to the numerical value in the corresponding relation between the size of the transmission block of the first layer and the size of the transmission block of the second layer as the size of the transmission block transmitted by the 4 layers; or,
first press the entry point (I)TBS,NPRB) In ITBSAnd NPRBThe corresponding relation of the transmission block size of the first layer and the transmission block size of the second layer is searched to obtain a numerical value, then the transmission block size of the double layer corresponding to the numerical value in the corresponding relation of the transmission block size of the first layer and the transmission block size of the second layer is searched, and the transmission block size of the double layer is multiplied by 2 to be used as the transmission block size transmitted by the 4 layers.
2. The method of claim 1, further comprising: and after the bit data of the coding words with the transmission block size are coded into symbols, the symbols are distributed on each layer according to the number of the layers and transmitted.
3. The method according to claim 1 or 2, wherein the threshold is 36 for 3-layer transmission and 27 for 4-layer transmission.
4. An apparatus for determining a transport block size when transmitting in 3-layer or 4-layer, comprising:
a judging unit, configured to judge whether the number of resource blocks allocated to the user equipment exceeds a threshold by the base station, and provide a judgment result to the determining unit;
a determining unit for processing according to the judgment result of the judging unit, if the number of resource blocks allocated to the user equipment does not exceed the threshold value, according to ITBSAnd NPRBThe value determined by the corresponding relation is directly used as the size of a transmission block transmitted by 3 layers or 4 layers, if the value exceeds a threshold value, the value is determined according to ITBSAnd NPRBThe value determined by the corresponding relation is converted to obtainTransport block size transmitted in 3 or 4 layers;
wherein the determination unit comprises four determination modules:
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of the resource blocks allocated to the user equipment does not exceed a threshold value, and the first determination module is used for determining the size of a transmission block transmitted in 3 layers by the code word according to one of three processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 3 layers, and the number of the resource blocks allocated to the user equipment exceeds a threshold value, and the second determination module is used for determining the size of a transmission block transmitted in 3 layers of the code word according to one of other three processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers, and the number of the resource blocks allocated to the user equipment does not exceed the threshold, and the third determination module is used for determining the size of the transmission block transmitted in 4 layers by the code word according to one of four processing modes;
the judgment result of the judgment unit is that the code word of the user equipment is transmitted in 4 layers, and the number of the resource blocks allocated to the user equipment exceeds the threshold value, and the fourth determination module is used for determining the size of the transmission block transmitted in 4 layers by the code word according to one of other four processing modes.
5. The apparatus of claim 4, further comprising: and the transmitting unit is used for encoding the bit data of the coding words with the transmission block size into symbols and then transmitting the symbols on each layer according to the number distribution of the layers.
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| CN101964697A (en) * | 2010-09-29 | 2011-02-02 | 中兴通讯股份有限公司 | Method and system for determining size of transmission block |
| CN102448122B (en) * | 2011-12-30 | 2017-07-14 | 中兴通讯股份有限公司 | The method of transport block size and base station in a kind of determination subframe |
| EP3105975B1 (en) | 2015-01-30 | 2019-10-02 | Nec Corporation | Method and apparatus for performing fractional subframe transmission |
| WO2016119193A1 (en) * | 2015-01-30 | 2016-08-04 | Nec Corporation | Method and apparatus for performing fractional subframe transmission |
| CN106330389B (en) * | 2015-06-30 | 2019-11-15 | 展讯通信（上海）有限公司 | Data transmission method, device and femto cell |
| CN108353285B (en) * | 2015-10-16 | 2021-02-05 | 华为技术有限公司 | Method for determining size of transmission block, user equipment and base station |
| CN109150370B (en) * | 2017-06-13 | 2021-07-16 | 维沃移动通信有限公司 | Method for determining size of transmission block and communication equipment |
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| CN101741517A (en) * | 2010-01-08 | 2010-06-16 | 中兴通讯股份有限公司 | Method and device for sending transmission block in uplink of multi-antenna system |
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