Telefonaktiebolaget Lm Ericsson (Publ)

Laura Clima

Per-Arne Thorsén

Hakan Grenabo

Håkan Grenabo

Simone Crosta

Andrea Angelini

Massimo Vincenzi

Giulio Monguzzi

A method of transmitting data packets is disclosed. The method comprises acquiring a data packet to be transmitted; parsing the data packet to extract at least a part of its header; matching the extracted part of the header with header items stored in a code book database; preparing, if the extracted part of the header matches a header item stored in the code book database, an adapted data packet comprising a code from the code book corresponding to the match replacing the at least part of the header, and the rest of the data packet; and transmitting the adapted data packet, if the adapted data packet is prepared, or the data packet, if no adapted data packet is prepared. A corresponding method of receiving data packets is also disclosed. The method comprises receiving a data transmission; determining whether the data transmission comprises a compressed header indicator for a data packet with a compressed header; and if the data packet is determined to comprise a compressed header, performing the steps of: parsing the data packet to extract a code; looking up a code book database using the extracted code to find corresponding header data; and decompressing the data packet by replacing the compressed header indicator and the extracted code by the header data. A transmitter, receiver, communication system, and computer program for implementing the methods are also disclosed.

Header compression with a code book

A radio link transmission method that comprises transmitting data on a plurality of radio channels. The method allocates a portion of the capacity of each radio channel for transmission of identical data on the plurality of radio channels. The remaining capacity of each radio channel is allocated for transmission of unique data, which is different for each radio channel. The method further transmits the identical data on each radio channel of the plurality of radio channels, and transmits the unique data in the respective radio channels of the plurality of radio channels.

Efficient working standby radio protection scheme

Growing community of inventors

Milan, Italy

Laura Clima