Method and device for demapping physical channels
A technology of physical channel and demapping, which is applied in communication between multiple stations, digital transmission system, error prevention and other directions, and can solve the problems of wrong physical channel demapping result, inaccurate calculation, and wrong physical channel demapping result, etc. , to achieve the effect of improving the accuracy
Active Publication Date: 2015-01-28
SANECHIPS TECH CO LTD
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However, because the performance of the code channel activation detection algorithm is not very ideal, the number of code channels detected by it is often not very accurate, which will lead to errors in the result of physical channel demapping
[0004] In the related art, due to the inaccurate calculation of the actual number of activated code channels of the CCTrCH, the wrong physical channel demapping result is obtained, and no effective solution has been proposed so far.
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[0035] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0036]In the following embodiments, the Transport Format Combination Indicator (TFCI) notifies the receiver of the transport format combination of the CCTrCH. Once the TFCI is detected, the transport format combination is known, and thus the transport format of each transport channel is known.
[0037] figure 1 is a flowchart of a physical channel demapping method according to an embodiment of the present invention, such as figure 1 shown, including:
[0038] Step S102, according to the transmission format combination indication TFCI information in the coding combination channel CCTrCH, obtain the transmission format TF of all transmission channels in the CCTrCH;
[0039] Step S104, according to ...
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The invention discloses a method and a device for demapping physical channels, wherein the method comprises the following steps of: according to the information of a transport format combination indicator (TFCI) in a CCTrCH (Coded Composite Transport CHannel), acquiring the transport format (TF) of all the transport channels in the CCTrCh; determining the number of bits of one wireless frame length of each transport channel after rate matching according to the TF respectively, and summing up to obtain the number of bits of one wireless frame length of the CCTrCH; respectively determining the number of bits of a data domain carried by each code channel; determining the number of code channels activated in the CCTrCH according to the number of bits of one wireless frame length of the CCTrCH and the number of bits of the data domain; and demapping physical channels according to the number of the activated code channels. With the invention, the accuracy of demapping physical channels is improved.
Description
technical field [0001] The present invention relates to the communication field, in particular, to a method and device for demapping physical channels. Background technique [0002] In the downlink of a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA for short) communication system, physical channel demapping processing is a very important link. The physical channel demapping process is to select each data symbol from each transmission channel (also called a code channel) according to the same mapping pattern at the sending end, and restore it to the order when the sending end sends it. Since different transport channels are encoded and multiplexed into one coded composite transport channel during the coding process, the current coded composite transport channel (Coded Composite Transport Channel, CCTrCH for short) must be determined first when the physical channel is demapped. The number of code channels actually activated. [0003] In an actual system, ...
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IPC IPC(8): H04L1/00H04B7/26
Inventor袁学龙
OwnerSANECHIPS TECH CO LTD