| 摘要 |
Disclosed are an information transmission method, a network device and a terminal device. The method is applied to a communication system comprising at least one group of terminal devices, wherein the at least one group of terminal devices multiplex the same time frequency resource. The method comprises: a network device generating a sparse extended matrix, wherein the sparse extended matrix is used for indicating the mapping relationship between a time frequency resource and a data stream; according to the sparse extended matrix, performing sparse coding on the data stream subjected to channel coding; and sending the data stream subjected to sparse coding and information about the sparse extended matrix to the at least one group of terminal devices. In the embodiments of the invention, a multimedia broadcast multicast service is combined with a non-orthogonal access technique, sparse coding is performed according to a sparse extended matrix, and a receiving end can decode a data stream subjected to sparse coding according to the sparse extended matrix. Therefore, the sharing of a frequency spectrum resource in a non-orthogonal manner in a multimedia broadcast multicast service is realized, and the frequency spectrum utilization rate is improved. |
