The disclosure discloses a data rearrangement method. The method includes: determining N/4 4-4 data rearrangement networks in a current N-N rearrangeable non-blocking Benes network; determining sequence numbers of input data of each 4-4 data rearrangement network according to a preset data rearrangement rule; and determining, according to sequence numbers corresponding to input data of switch circuits in the 4-4 data rearrangement networks, a data output mode of the switch circuits, and outputting the input data of the current 4-4 data rearrangement network according to the data output mode corresponding to each switch circuit in the current 4-4 data rearrangement network, N=2.sup.n, and n being a positive integer greater than 1. The disclosure also discloses a data rearrangement apparatus and a storage medium.

A communication system includes a terminal having a first storage section for storing a number of pieces of content information, a second storage section for storing a number of pieces of the content information, a storage control section for placing a content ID stored in the second storage section into purchase information for each terminal and stored in the second storage section, an access control section for controlling access to the content information corresponding to the content ID stored in the second storage section, and an accounting setting section for setting an amount of a fee to be imposed on the terminal in response to the purchase information.

Apparatus and methods relating to synchronization of communication equipment are disclosed. Synchronization information received from a bonded communication link can be used to synchronize local and/or remote communication equipment, such as femtocell sites coupled to nodes in a ring network. This may involve isolating a frequency reference signal from a DSL (Digital Subscriber Line) communication link which is a constituent link of a bonded communication link, for example. In a ring network, received synchronization information could be used in synchronizing a locally connected installation of communication equipment, and passed for transmission in the ring network for synchronizing other communication equipment. Such dropping and passing of an analog frequency reference signal could be applied in networks having other topologies as well. At least some embodiments of the invention are applicable to optical links. One or more dedicated wavelengths of an optical link could be used to transfer a frequency reference signal, for example. Other functions, such as quality monitoring, quality reporting, and/or predictive traffic forwarding may be provided in some embodiments.