A terrestrial data communication gateway device for satellite communication comprising: at least one processor; memory accessible to the at least one processor; a LPWAN wireless communication subsystem for communication with multiple remote devices; a satellite communication subsystem for communication with at least one low earth orbit satellite. The memory stores program code executable by the processor to cause the processor to: perform server functions in relation to the multiple remote devices, and configure an edge computing module to perform data processing operations on signals received by the LPWAN communication subsystem. The data processing operations comprise compression of data received by the LPWAN communication subsystem to generate a compressed payload for transmission by the satellite communication subsystem. The memory comprises a backhaul scheduling module to schedule communication of a transmission by the satellite communication subsystem to the low earth orbit satellite.

A wireless video transmission system includes: a coarse compression module to compress a video sub-frame and to generate coarse data of the video sub-frame: a coarse decompression module to generate a coarse sub-frame from the coarse data; an error frame extractor to generate an error sub-frame from the coarse sub-frame and from the video sub-frame; a refinement data encoder to generate a set of transform coefficients from the error sub-frame, and to select a subset of transform coefficients from the set of transform coefficients according to an end-of-block (EOB) indication in the coarse data; and a data combining and modulation module to combine and transmit the coarse data and a refinement data including the subset of transform coefficients.

Method and system for lossless and stateless compression scheme is used with a fixed-length data such as frames. Frames having a payload of M bits length are mapped into a payload of N bits length, where N<M. The N bits payload of each received frame is extracted, and mapped using a memory, PLD, or a processor, to reconstruct the uncompressed M bits payload, and to form the original frame. The reconstruction may use a set of N coefficients that are each multiplied by the corresponding received payload bit, and summarized modulo-2 to obtain the original pre-compressed M payload bits. The method and system may be used with a vehicle bus, such as Controller Area Network (CAN). The compressed frames may use the same or different protocol than the uncompressed ones, and may further carry an additional code such as metadata, error detection or correction code, or authentication related code.

Method and system for lossless and stateless compression scheme is used with a fixed-length data such as frames. Frames having a payload of M bits length are mapped into a payload of N bits length, where N<M. The N bits payload of each received frame is extracted, and mapped using a memory, PLD, or a processor, to reconstruct the uncompressed M bits payload, and to form the original frame. The reconstruction may use a set of N coefficients that are each multiplied by the corresponding received payload bit, and summarized modulo-2 to obtain the original pre-compressed M payload bits. The method and system may be used with a vehicle bus, such as Controller Area Network (CAN). The compressed frames may use the same or different protocol than the uncompressed ones, and may further carry an additional code such as metadata, error detection or correction code, or authentication related code.

An interface circuit includes: a packet transmitter configured to generate a plurality of transmission packets based on a request, which is output from a core circuit, and output the plurality of transmission packets, the plurality of transmission packets including information indicative of being a packet to be merged; and a packet receiver configured to generate a merged packet by merging a plurality of extension packets from among a plurality of reception packets received from outside the interface circuit, the plurality of extension packets including information indicative of being a packet to be merged.

An interface circuit includes: a packet transmitter configured to generate a plurality of transmission packets based on a request, which is output from a core circuit, and output the plurality of transmission packets, the plurality of transmission packets including information indicative of being a packet to be merged; and a packet receiver configured to generate a merged packet by merging a plurality of extension packets from among a plurality of reception packets received from outside the interface circuit, the plurality of extension packets including information indicative of being a packet to be merged.

An apparatus obtains a set of radio data comprising signal strength related values for radio signals transmitted by a transmitter with an association of each signal strength related value with a representation of a geographical location. The apparatus applies a frequency transform to the obtained set of radio data to obtain transform coefficients, each transform coefficient comprising a transform index and an associated transform value. The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index. The same or another apparatus decodes the compressed transform indices again for use in position operations.

An apparatus obtains a set of radio data comprising signal strength related values for radio signals transmitted by a transmitter with an association of each signal strength related value with a representation of a geographical location. The apparatus applies a frequency transform to the obtained set of radio data to obtain transform coefficients, each transform coefficient comprising a transform index and an associated transform value. The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index. The same or another apparatus decodes the compressed transform indices again for use in position operations.

In some examples, a computer system may receive a plurality of chunks of data of a data object. The system may compress the plurality of chunks of data to obtain a plurality of compressed chunks, and may determine whether the plurality of compressed chunks together are less than a threshold size. Based on determining that the plurality of compressed chunks together are less than the threshold size, the system may add, to respective entries in a map data structure, respective sizes of the plurality of compressed chunks. In addition, the system may compact the map data structure by combining values in at least two of the respective entries, and may store the plurality of compressed chunks and the compacted map data structure.

According to an example aspect of the present invention, there is provided an apparatus configured to initiate a handshake process configured to establish a control plane connection prior to establishing an associated data plane connection from the apparatus to a gateway node in second network, the apparatus being in a first network distinct from the second network, indicate during the establishing of the control plane connection that compression of payload communicated over the data plane connection is requested, and wherein the data plane connection to the gateway node traverses at least one intermediate internet protocol exchange.