Provision of additional traffic capacity by slot punching
Original Publication Date: 2010-Jul-31
Included in the Prior Art Database: 2010-Jul-31
TETRA is a TDMA system where information is carried in discrete slots of information. It already allows for slots to be stolen within circuit mode channels to send additional signalling or data, and the receiving radios can recover from missing audio frames caused by this, or by signal loss. This invention makes use of the ability of a receiving radio to recover from a frame loss. Slots are regularly punched out from many or all of the allocated downlink circuit mode traffic channels on a site in a regularly advancing pattern, and an extra one or more calls is allocated to the stolen pattern of frames.