Method, system and device for adaptive modulation and coding
A technology of adaptive modulation and coding method, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as inapplicability of PRB, no way to directly apply PRB, and inability of channel quality to select transmission format for PRB.
Active Publication Date: 2012-12-12
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
The truncated PRBs in these special service subframes can be used to carry downlink data like the complete PRBs in ordinary subframes, but since the existing TBS tables are designed based on complete PRBs, most of the options cannot be directly applied These truncated PRBs
[0009] The disadvantage of the existing technology is: since the TBS table specified in the current protocol is designed based on the complete PRB, most of the options are not applicable to the truncated PRB
If no modification is made, the truncated PRB will not be able to select the best transmission format according to the channel quality, resulting in a decrease in transmission spectrum efficiency
Method used
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[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0027]The main purpose of the present invention is to use the existing self-adaptive processing process and resources, without changing the existing {TBS, MCS} table, and without adding a new {TBS, MCS} table for the truncated PRB, through the NodeB And the corresponding UE converts the TBS obtained in the prior art (for truncated PRBs), so as to solve the technical defect that the truncated PRBs cannot be used to implement AMC in the prior art. The specific process is briefly introduced as follows: First, when the NodeB schedules resour...
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The invention provides a method for adaptive modulation and coding. The method comprises the following steps that: NodeB selects a truncated PRB for transmitting downlink data for UE; according to a born service, the NodeB determines the size of transmission blocks TBS[P-PRB] and the number of truncated PRB pairs when the truncated PRB is used for transmission; and the NodeB transmits the data blocks, of which the size is the TBS[P-PRB], to the UE, and transmits the number of the used truncated PRB pairs and a MCS serial number to the UE, and the UE looks up a TBS table according to the number of truncated PRB pairs, determines the TBS[PRB] when the PRB transmission is completed, and converts the TBS[PRB] into the TBS[P-PRB]. In the method, by converting the TBS[PRB] into the TBS[P-PRB], the UE can obtain the correct TBS, so that by using the original adaptive processing process and resources, the special conditions caused when the downlink data is transmitted by the truncated PRB can be processed easily with high efficiency.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, in particular to an adaptive modulation and coding method, system and device. Background technique [0002] In order to ensure a high competitiveness in a longer period of time, the 3GPP (Third Generation Partnership Project, Third Generation Partnership Project) has launched a research project on LTE (Long Term Evolution, Long Term Evolution) of 3G radio interface technology. The AMC (Adaptive Modulation and Coding, Adaptive Modulation and Coding) technology has become one of the key technologies of the LTE. [0003] AMC is adaptive modulation and coding technology, which is a physical layer that compensates the fading effect of the received signal due to channel changes by adaptively adjusting the modulation and coding method of the transmitted data, thereby improving the signal-to-noise ratio performance of the signal Link Adaptation (Link Adaptation) technology. The imp...
Claims
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IPC IPC(8): H04L1/00H04L29/06
Inventor 肖国军丁昱索士强孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD