Mobile radiosystem with main-channels for wireless communication between and with mobile subscriber stations and with sub-channels for sleart-range wireless communication between mobile subscriber stations having portable communication apparatus associated therewith

摘要

1. A mobile radio system with main channels for wireless communication between and with mobile suscriber devices, and with sub-channels for local wireless connections between mobile suscriber devices and portable communication devices assigned to said mobile subscriber devices, wherein the mobile radio system is based on a radio network having a plurality of radio stations provided in a reciprocal spatial arrangement forming a cellular system with overlapping radio cells, and the radio stations are provided with a frequency distribution plan which substantially eliminates same-channel disturbances in any given radio cell including an extended boundary zone, characterised in that in each considered sub-channel cell (e.g. s) sub-channels use frequencies with transmitting powers which are reduced relative to the main channel transmitting powers and which are equal to the frequencies of main channels of the other main channel cells (e.g. S) of the radio network (F), where the sub-channel cell (s) lies in the interference irradiation zone of the main channel cells in question (e.g. A) and where the cell boundaries of the sub-channel cells (a, s) need not be identical to those of the main channel cells (A, S).