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Method for determining size of transport block and apparatus thereof

A technology of transmission block size and transmission block, applied in the field of mobile communication, can solve the problems of different symbol lengths, irregular resources, and inability to accurately control the amount of TB data, and achieve the effect of improving throughput

Active Publication Date: 2012-03-14
CHINA MOBILE COMM GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] However, in practical applications, it is possible that the symbol lengths of different RBs are different, such as Figure 5 as shown, Figure 5 It is a schematic diagram of existing RBs with different symbol lengths. Due to irregular resources occupied by control channels, etc., the symbol lengths of RB1, RB2, and RB3 are different.
A typical scenario where the above situation occurs is a relay backhaul link, such as Image 6 as shown, Image 6 It is a schematic diagram of the symbol length of each RB on the existing relay backhaul link. Since some resources of RB2, RB3 and RB4 are occupied by control channels, etc., the symbol length of RB2, RB3 and RB4 is shorter than that of RB1. In this case In this situation, the above-mentioned method for determining the RB size is no longer applicable, and there is no effective way to deal with this situation in the prior art, which leads to the inability to accurately control the amount of data transmitted each time on the TB, thereby reducing the system Throughput

Method used

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  • Method for determining size of transport block and apparatus thereof
  • Method for determining size of transport block and apparatus thereof
  • Method for determining size of transport block and apparatus thereof

Examples

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example 1

[0080] Suppose there are 3 categories, that is, the value of N is 3, the number of RBs in each category is 1, 1, and 2 respectively, and different initial correction coefficients are set for each category, which are 0.5, 0.8, and 0.75, then R =(0.5×1+0.8×1+0.75×2) / 4=0.7.

example 2

[0082] Assume that there are 3 categories, that is, the value of N is 3, and the number of RBs in each category is 1, 1, and 2 respectively. Assume that the symbol length of RB in category 1 is 3, and the symbol length in category 2 is 5. Symbols in category 3 are of length 7, and assume:

[0083] m symb，i i = 0.5;

[0084] m symb，i ≥7,R i =0.75;

[0085] Then R=(0.5×2+0.75×2) / 4=0.625.

[0086] In practical applications, the specific values ​​of each initial correction coefficient can be determined through multiple experiments.

[0087] Step 74: According to R, N PRB and I TBS Determine the size of TB1.

[0088] In this step, first calculate R×N PRB , and the calculation result is rounded down; then, determine whether the result after rounding down is less than 1, and if so, use 1 and I TBS As a parameter, the size of TB1 is determined by querying Table 2, otherwise, the result after rounding down and I TBS As a parameter, determine the size of TB1 by querying Table...

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Abstract

The invention provides a method for determining a size of a transport block, and a transport block (TB) to be processed is assumed to be TB1. The method comprises the following steps: determining an effective bit sequence number (I[TBS]) corresponding to the TB1 and a number N[PRB] of resource blocks (RBs) used for data transmission; according to a rule that symbol lengths of RBs in a same category are same, classifying the N[PRB] RBs, and counting a category total number and a RB number of each category; setting an initial correction coefficient for each category; determining a final correction coefficient R according to the initial correction coefficient and the RB number of each category; determining a size of the TB1 according to the R, the N[PRB] and the I[TBS]. The invention provides an apparatus for determining the size of transport block. By applying the method and the apparatus in the invention, system throughput can be raised.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method and device for determining the size of transmission block. Background technique [0002] In the existing Long Term Evolution (LTE, Long Term Evolution) system, in the downlink direction, the processing process of the physical layer channel mainly includes three sub-processes of generating a transport block (TB, Transport Block), modulation, and resource mapping. [0003] figure 1 It is a schematic diagram of the processing process of the existing physical layer channel. Such as figure 1 As shown, in sub-process 1, the base station generates two TBs altogether, and each TB all bears the bits of a code word (Code Word) to be transmitted, and the number of effective bits carried on each TB is recorded as TBS; In process 2, scrambling (Scrambling), modulation mapping (Modulation Mapper) and layer mapping (Layer Mapper) are sequentially performed on the received T...

Claims

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Application Information

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IPC IPC(8): H04W28/04H04W28/06H04L1/00
Inventor 沈晓冬徐晓东姜大洁
Owner CHINA MOBILE COMM GRP CO LTD
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