公开(公告)号：WO2009053825A2

公开(公告)日：2009-04-30

申请号：PCT/IB2008/002836

申请日：2008-10-23

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  CHENG, Jung-Fu ,  ÅHLANDER, Mats ,  AALTO, Christer

Inventor： CHENG, Jung-Fu ,  ÅHLANDER, Mats ,  AALTO, Christer

IPC: H03M13/09

CPC classification number: H03M13/09 ,  H03M13/2957 ,  H03M13/2975 ,  H04L1/0041 ,  H04L1/0051 ,  H04L1/0061

Abstract: A method and apparatus for providing adaptive cyclic redundancy check (CRC) computation is disclosed. A transport block size is determined. Transport block (TB) CRC bits are computed with a first CRC generator when the TB size is less than or equal to a predetermined threshold. TB CRC bits are computed with a second CRC generator when the transport block size is greater than the predetermined threshold. When the TB is greater than the predetermined threshold, the TB is segmented into code blocks (CBs) and CB CRC bits are computed with the first CRC generator. A method and apparatus for handling adaptively cyclic redundancy check (CRC) encoded transport blocks (TBs) is also disclosed. A TB is received. The TB is CRC checked based on a first CRC generator when the TB size is less than or equal to a predetermined threshold. Code blocks of the TB are CRC checked based on the first CRC generator when the TB size is greater than the predetermined threshold. When the TB size is greater than the predetermined threshold, the code blocks are concatenated, and the TB is CRC checked based on a second CRC generator.

Abstract translation: 公开了一种用于提供自适应循环冗余校验（CRC）计算的方法和装置。 确定传输块大小。 传输块（TB）当TB大小小于或等于预定阈值时，使用第一CRC生成器计算CRC比特。 当传输块大小大于预定阈值时，用第二CRC产生器计算TB CRC比特。 当TB大于预定阈值时，TB被分割为码块（CB），并且用第一CRC产生器计算CB CRC比特。 还公开了一种用于处理自适应循环冗余校验（CRC）编码传输块（TB）的方法和装置。 收到结核病。 当TB大小小于或等于预定阈值时，TB基于第一CRC发生器进行CRC校验。 当TB大于预定阈值时，基于第一CRC生成器对TB的代码块进行CRC校验。 当TB大小大于预定阈值时，代码块被级联，并且基于第二CRC产生器检查TB是否被CRC校验。

公开(公告)号：WO2016050323A1

公开(公告)日：2016-04-07

申请号：PCT/EP2014/071249

申请日：2014-10-03

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： ASANAKA, Kazunori ,  AALTO, Christer

IPC: H03M13/09

CPC classification number: H03M13/091 ,  H03M13/617

Abstract: The disclosure relates to a method (200) performed in a cyclic redundancy check, CRC, device (300) for calculating, based on a generator polynomial G(x), a CRC code for a message block. The method (200) comprises receiving (201) n segments of the message block in forward order or in reverse order, wherein at least one segment is received in reverse order; calculating (202) for each of the n segments a respective segment CRC code based on the generator polynomial G(x), wherein each segment CRC is calculated according to the received order of the segment; aligning (203) each of the n segment CRC codes; and calculating (204) the CRC code for the message block by adding together each of the aligned n segment CRC codes. The disclosure also relates to a device (300), computer program and computer program product.

Abstract translation: 本发明涉及在循环冗余校验CRC，装置（300）中执行的方法（200），用于基于生成多项式G（x）计算消息块的CRC码。 方法（200）包括以正向或反向顺序接收（201）消息块的n个段，其中以相反的顺序接收至少一个段; 基于生成多项式G（x），对n个段中的每个段计算（202）各个段CRC码，其中根据段的接收顺序来计算每个段CRC; 对准（203）n个区段CRC码中的每一个; 以及通过将对准的n个区段CRC码中的每一个相加来计算（204）消息块的CRC码。 本公开还涉及一种设备（300），计算机程序和计算机程序产品。