A method for forwarding a packet is provided. In the method: a first packet is received that includes first indication information, payload data, and a packet sequence number of the first packet in a data flow corresponding to the first packet. When a first network device determines that the first packet includes the first indication information, the first network device generates a plurality of second packets based on the first packet. Each of the plurality of second packets includes the payload data, the packet sequence number, and second indication information. The first network device separately forwards the plurality of second packets to a second network device over different forwarding paths.

A data transmission method used for a first data transmission device includes: constructing a first media access control (MAC) frame, where the first MAC frame includes a frame header part and a data part, the frame header part includes a protocol type field, the protocol type field of the first MAC frame is a first indication value, the first indication value indicates that the data part of the first MAC frame includes a data header and data content, the data header includes a frame type field and a data length field, the frame type field indicates a type of the first MAC frame, and the data length field indicates a length of the data content; and sending the first MAC frame to a second data transmission device. In this application, fast data transmission can be implemented, and a transmission delay between devices can be reduced.

A data transmission method used for a first data transmission device includes: constructing a first media access control (MAC) frame, where the first MAC frame includes a frame header part and a data part, the frame header part includes a protocol type field, the protocol type field of the first MAC frame is a first indication value, the first indication value indicates that the data part of the first MAC frame includes a data header and data content, the data header includes a frame type field and a data length field, the frame type field indicates a type of the first MAC frame, and the data length field indicates a length of the data content; and sending the first MAC frame to a second data transmission device. In this application, fast data transmission can be implemented, and a transmission delay between devices can be reduced.

Method and system for transmitting data comprising assigning data packets to be transmitted between a server and a base station with a set of transmission quality parameters, wherein the transmission quality parameters for each data packet are defined using information included within the data packets and transmitting the data packets between the server and the base station, according to the assigned set of transmission quality parameters.

Method and system for transmitting data comprising assigning data packets to be transmitted between a server and a base station with a set of transmission quality parameters, wherein the transmission quality parameters for each data packet are defined using information included within the data packets and transmitting the data packets between the server and the base station, according to the assigned set of transmission quality parameters.

Systems and methods are described for avoiding redundant data transfers using delta coding techniques when reliably and opportunistically communicating data to multiple user systems. According to embodiments, user systems track received block sequences for locally stored content blocks. An intermediate server intercepts content requests between user systems and target hosts, and deterministically chucks and fingerprints content data received in response to those requests. A fingerprint of a received content block is communicated to the requesting user system, and the user system determines based on the fingerprint whether the corresponding content block matches a content block that is already locally stored. If so, the user system returns a set of fingerprints representing a sequence of next content blocks that were previously stored after the matching content block. The intermediate server can then send only those content data blocks that are not already locally stored at the user system according to the returned set of fingerprints.

A system, comprising: a configurable parser that comprises one or more configurable parsing engines, wherein the configurable parser is arranged to receive a packet and to extract from the packet headers associated with a set of protocols that comprises at least one protocol; a packet type detection unit that is arranged to determine a type of the packet in response to the set of protocols; and a configurable data integrity unit that comprises a configuration unit and at least one configurable data integrity engine; wherein the configuration unit is arranged to configure the at least one configurable data integrity engine according to the set of protocols; and wherein the at least one configurable data integrity engine is arranged to perform data integrity processing of the packet to provide at least one data integrity result

A communication method includes determining that content of a to-be-sent second data packet is the same as content of a first data packet, and sending repetition indication information. The second data packet follows the first data packet. The repetition indication information is useable to indicate that the second data packet repeats a previous data packet.

A communication method includes determining that content of a to-be-sent second data packet is the same as content of a first data packet, and sending repetition indication information. The second data packet follows the first data packet. The repetition indication information is useable to indicate that the second data packet repeats a previous data packet.

A data packet comprises a header and a payload. At least one digital signal processor is used to configure the payload to transport at least one full service data unit, one or two service data unit fragments, or at least one full service data unit and at least one service data unit fragment. A service data unit fragment is only located (i) at the beginning of the payload or at the end of the payload or (ii) at the beginning of the payload and at the end of the payload. At least one digital signal processor is used to configure a single field in the header consisting of a first bit and a second bit, even when a number of full service data units and service data unit fragments in the payload is more than two, the single field indicating whether (i) the payload begins with a fragment of a service data unit and (ii) the payload ends with a service data unit fragment. At least one digital signal processor is used to form the data packet including the configured header and the configured payload. A transmitter transmits the data packet.