초록 ▼

A mobile communication system in which various access methods may be selected according to the user's priority. In the mobile communication system, each of mobile stations and radio base stations has a radio processor, which has TDMA, CDMA and FDMA communication units. The CDMA communication unit co

A mobile communication system in which various access methods may be selected according to the user's priority. In the mobile communication system, each of mobile stations and radio base stations has a radio processor, which has TDMA, CDMA and FDMA communication units. The CDMA communication unit comprises channel coders each for performing a primary modulation to a transmitting signal, spread-spectrum code generators for respectively generating different spread-spectrum signals, a clock generator/controller for controlling the generation of chip clocks to control the generation of the spread-spectrum codes, oscillators for setting different carrier frequencies to outputs calculated as products, and a CPU for generally controlling various parts or elements to control the assignment of a CDMA signal or a TDMA signal to an arbitrary time slot transmitted from the TDMA communication unit. The radio processor transmits different signals of different access methods existing in each time slot of the same frame different signals.

대표청구항 ▼

[ We claim:] [1.] A mobile communication system which includes a plurality of mobile and/or portable radio stations, and radio base stations for performing wireless communication between said mobile stations and said base stations using a predetermined method selected from a number of multiple acces

[ We claim:] [1.] A mobile communication system which includes a plurality of mobile and/or portable radio stations, and radio base stations for performing wireless communication between said mobile stations and said base stations using a predetermined method selected from a number of multiple access methods, wherein each of said mobile and/or portable radio stations and radio base stations comprises:(a) TDMA communication means for assigning TDMA signals to time slots, which are contained in a frame, to perform communication based on TDMA method;(b) time-divided CDMA communication means having at least one spread-spectrum code generator and adapted for communication of time-divided CDMA signals based on a time-divided CDMA method;(c) said time-divided CDMA communication means being adapted for assigning time-divided spread-spectrum codes, which are generated by said spread-spectrum code generator, to said time slots of said TDMA communication method, whereby communication is carried out in such a manner that both TDMA signals and CDMA signals exist in said time slots; and(d) control means for selecting one of said TDMA method and said time-divided CDMA method for carrying out communication.