Radio channel selecting method suitable for a mobile station to mobile station direct communication system, and the originating mobile station and destination mobile station used in the system

Claim 2

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station, said method comprising the step of: selecting a channel which is used as a radio channel to be switched to mobile station direct communication channels, during a call or communication among said plural mobile station, by means of an originating mobile station, based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station.

Claim 3

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 1, wherein said originating mobile station selects said channel based on information regarding a call number of said destination mobile station, said channel being used as a radio channel during a call or communication to be switched.

Claim 4

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 2, wherein said originating mobile station selects a channel which is used as a radio channel during a call or communication to be switched, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L(natural number).

Claim 5

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 2, wherein said originating mobile station selects a selectable channel with a priority, said channel being used as a radio channel during a call or communication to be switched.

Claim 6

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 1, wherein said originating mobile station selects a selectable channel with a priority, said channel being used as a radio channel during a call or communication to be switched.

Claim 7

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station, said method comprising the steps of: selecting a channel which is used as a radio channel to be switched to base station communication channels by means of an originating mobile station, during an incoming call or communication among said plural mobile station, based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station; and selecting a channel which is retrieved as a radio channel to be switched to mobile station direct communication channels, by means of a destination mobile station, during an incoming call or communication among said plural mobile station based on information regarding said destination mobile station itself, when said direct communication is intended.

Claim 8

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station, said method comprising the steps of: selecting a channel which is used as a radio channel to be switched to base station communication channels by means of an originating mobile station, during an incoming call or communication among said plural mobile station, based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station; and selecting a channel which is retrieved as a radio channel to be switched to mobile station direct communication channels, by means of a destination mobile station, during an incoming call or communication among said plural mobile station based on information regarding said destination mobile station itself, when said direct communication is intended.

Claim 9

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 6, wherein said originating mobile station selects a channel based on information regarding the call number of said destination mobile station, said channel being used as a radio channel to be switched during a call or communication; and wherein said destination mobile station selects a channel based on information regarding the call number of said destination mobile station itself when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 10

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 7, wherein said originating mobile station selects a channel which is used as a radio channel during a call or communication to be switched, said channel being one selected from an initial value i among j (natural number) radio channels spaced apart by an internal i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number) and wherein said destination mobile station selects a channel when a radio channel to be switched is retrieved during an incoming call or communication, said channel being one selected from an initial value among j (natural number) radio channel spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number).

Claim 11

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 7, wherein said destination mobile station selects a selectable channel with a priority when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 12

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 9, wherein said destination mobile station selects a selectable channel with a priority based on a channel used in the past when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 13

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 10, wherein said destination mobile station adjusts the retrieval frequency to a selectable channel based on a channel used in the past when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 14

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 6, wherein said destination mobile station selects a selectable channel with a priority when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 15

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 12, wherein said destination mobile station selects a selectable channel with a priority based on a channel used in the past when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 16

The radio channel selecting method for a mobile station to mobile station direct communications system according to claim 13, wherein said destination mobile station adjusts the retrieval frequency to a selectable channel based on a channel used in the past when a radio channel to be switched is retrieved during an incoming call or communication.

Claim 17

An originating mobile station for a mobile station to mobile station direct communications system, said originating mobile station being used in a wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving base station; said originating mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station, comprising: channel selecting means for selecting a channel used as a radio channel to be switched to mobile station direct communication channels, during a call or communication among said plural mobile station, based on information regarding a destination mobile station.

Claim 18

An originating mobile station for a mobile station to mobile station direct communications system, said originating mobile station being used in a wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving base station; said originating mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station, comprising: channel selecting means for selecting a channel used as a radio channel to be switched to mobile station direct communication channels, during a call or communication among said plural mobile station, based on information regarding a destination mobile station.

Claim 19

The originating mobile station for a mobile station to mobile station direct communications system according to claim 15, wherein said channel selecting means selects said channel based on information regarding a call number of said destination mobile station.

Claim 20

The originating mobile station for a mobile station to mobile station direct communications system according to claim 16, wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a carrier to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 21

The originating mobile station for a mobile station to mobile station direct communications system according to claim 17, further comprising channel selecting changing means that changes a channel selection condition for said channel selecting means.

Claim 22

The originating mobile station for a mobile station to mobile station direct communications system according to claim 18, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 23

The originating mobile station for a mobile station to mobile station direct communications system according to claim 16, wherein said channel selecting means selects a selectable channel with a priority.

Claim 24

The originating mobile station for a mobile station to mobile station direct communications system according to claim 20, further comprising a channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 25

The originating mobile station for a mobile station to mobile station direct communications system according to claim 21, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 26

The originating mobile station for a mobile station to mobile station direct communications system according to claim 16, further comprising a channel selection changing means that changes a channel selection condition for said selecting means.

Claim 27

The originating mobile station for a mobile station to mobile station direct communications system according to claim 23, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 28

The originating mobile station for a mobile station to mobile station direct communications system according to claim 15, wherein said channel selecting means selects a selectable channel with a priority.

Claim 29

The originating mobile station for a mobile station to mobile station direct communications system according to claim 25, further comprising a channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 30

The originating mobile station for a mobile station to mobile station direct communications system according to claim 26, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 31

The originating mobile station for a mobile station to mobile station direct communications system according to claim 15, further comprising a channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 32

The originating mobile station for a mobile station to mobile station direct communications system according to claim 28, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 33

A destination mobile station for a mobile station to mobile station direct communications system, said destination mobile station being used in a wireless handset telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station said destination mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station comprising: channel selecting means for selecting a channel at the time of retrieving a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding said destination mobile station itself.

Claim 34

A destination mobile station for a mobile station to mobile station direct communications system, said destination mobile station being used in a wireless handset telephone system including plural mobile stations and a base station accommodating said plural mobile stations; plural mobile station to mobile station direct communication channels which are provided as mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station said destination mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station comprising: channel selecting means for selecting a channel at the time of retrieving a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding said destination mobile station itself.

Claim 35

A destination mobile station for a mobile station to mobile station communications system according to claim 30, said channel selecting means selects a channel based on information regarding a self call number.

Claim 36

The destination mobile station for a mobile station to mobile station direct communications system according to claim 31, wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a channel to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 37

The destination mobile station for a mobile station to mobile station direct communications system according to claim 32, further comprising a channel selection changing means that changes a channel selecting condition for said channel selecting means.

Claim 38

The destination mobile station for a mobile station to mobile station direct communications system according to claim 33, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 39

The destination mobile station for a mobile station to mobile station direct communications system according to claim 31, wherein said channel selecting means selects a selectable channel with a priority.

Claim 40

The destination mobile station for a mobile station to mobile station direct communications system according to claim 35, wherein said channel selecting means comprises memory means for storing information regarding a channel used in the past; and selecting means for selecting a selectable channel with a priority based on the channel information used in the past stored in said memory means.

Claim 41

The destination mobile station for a mobile station to mobile station direct communications system according to claim 36, wherein said channel selecting means comprises memory means for storing information regarding a channel used in the past; and means for adjusting a selectable channel with a retrieval frequency based on the channel information used in the past stored in said memory means.

Claim 42

The destination mobile station for a mobile station to mobile station direct communications system according to claim 37, further comprising channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 43

The destination mobile station for a mobile station to mobile station direct communications system according to claim 38, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via an operating means added to said originating mobile station.

Claim 44

The destination mobile station for a mobile station to mobile station direct communications system according to claim 36, further comprising a channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 45

The destination mobile station for a mobile station to mobile station direct communications system according to claim 40, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via an operating means added to said originating mobiles station.

Claim 46

The destination mobile station for a mobile station to mobile station direct communications system according to claim 35, further comprising channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 47

The destination mobile station for a mobile station to mobile station direct communications system according to claim 42, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 48

The destination mobile station for a mobile station to mobile station direct communications system according to claim 31, further comprising channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 49

The destination mobile station for a mobile station to mobile station direct communications system according to claim 68, wherein said channel selection changing means changes channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 50

The destination mobile station for a mobile station to mobile station direct communications system according to claim 30, wherein said channel selecting means selects a selectable channel with a priority.

Claim 51

The destination mobile station for a mobile station to mobile station direct communications system according to claim 46, wherein said channel selecting means comprises memory means for storing information regarding a channel used in the past; and selecting means for selecting a selectable channel with a priority based on the channel information used in the past in said memory means.

Claim 52

The destination mobile station for a mobile station to mobile station direct communications system according to claim 47, wherein said channel selecting means comprises memory means for storing information regarding a channel used in the past; and means for adjusting a selectable channel with a retrieval frequency of said selectable channel on the channel information used in the past stored in said memory means.

Claim 53

The destination mobile station for a mobile station to mobile station direct communications system according to claim 48, further comprising channel selection changing means that changes a channel selection condition for said channel selecting means.

Claim 54

The destination mobile station for a mobile station to mobile station direct communications system according to claim 49, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 55

The destination mobile station for a mobile station to mobile station direct communications system according to claim 47, further comprising channel selection changing means that changes the channel selection condition of said channel selecting means.

Claim 56

The destination mobile station for a mobile station to mobile station direct communications system according to claim 51, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 57

The destination mobile station for a mobile station to mobile station direct communications system according to claim 46, further comprising channel selection changing means that changes the channel selection condition of said channel selecting means.

Claim 58

The destination mobile station for a mobile station to mobile station direct communications system according to claim 53, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 59

The destination mobile station for a mobile station to mobile station direct communications system according to claim 54, further comprising channel selection changing means that changes the channel selection condition of said channel selecting means.

Claim 60

The destination mobile station for a mobile station to mobile station direct communications system according to claim 55, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 61

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station, said method comprising the step of: selecting a channel which is used as a radio channel to be switched to mobile station direct communication channels, during a call or communication among said plural mobile station, by means of an originating mobile station, based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station, wherein said originating mobile station selects said channel based on information regarding a call number of said destination station, said channel being used as a radio channel during a call or said direct communication between mobile stations, and wherein said originating mobile station selects a channel which is used as a radio channel during a call or said direct communication between mobile stations, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number).

Claim 62

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station, said method comprising the step of: selecting a channel which is used as a radio channel to be switched to mobile station direct communication channels, during a call or communication among said plural mobile station, by means of an originating mobile station, based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station, wherein said originating mobile station selects said channel based on information regarding a call number of said destination station, said channel being used as a radio channel during a call or said direct communication between mobile stations, and wherein said originating mobile station selects a channel which is used as a radio channel during a call or said direct communication between mobile stations, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number).

Claim 63

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels set differently from said mobile station to base station being used when said plural mobile stations are mutually communicating without involving a base station said method comprising the steps of: selecting a channel which is used as a radio channel to be switched to base station communication channels, during an incoming call or communication among said plural mobile station, by means of an originating mobile station based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station; and selecting a channel which is retrieved as a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, by means of a destination mobile station based on information regarding said destination mobile station itself, when said direct communication is intended, wherein said originating mobile station selects a channel based on information regarding the call number of said destination mobile station, said channel being used as a radio channel during a call or said direct communication between mobile stations; and wherein said destination mobile station selects a channel based on information regarding the call number of said destination mobile station itself when a radio channel to be switched is retrieved during an incoming call or communication, and wherein said originating mobile station selects a channel which is used as a radio channel during a call or said direct communication between mobile stations, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and wherein said destination mobile station selects a channel when a radio channel to be switched is retrieved during an incoming call or communication, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number).

Claim 64

A radio channel selecting method for a mobile station to mobile station direct communications system in a wireless telephone system; said wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels set differently from said mobile station to base station being used when said plural mobile stations are mutually communicating without involving a base station said method comprising the steps of: selecting a channel which is used as a radio channel to be switched to base station communication channels, during an incoming call or communication among said plural mobile station, by means of an originating mobile station based on information regarding a destination mobile station when a direct communication is intended between mobile stations without involving a base station; and selecting a channel which is retrieved as a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, by means of a destination mobile station based on information regarding said destination mobile station itself, when said direct communication is intended, wherein said originating mobile station selects a channel based on information regarding the call number of said destination mobile station, said channel being used as a radio channel during a call or said direct communication between mobile stations; and wherein said destination mobile station selects a channel based on information regarding the call number of said destination mobile station itself when a radio channel to be switched is retrieved during an incoming call or communication, and wherein said originating mobile station selects a channel which is used as a radio channel during a call or said direct communication between mobile stations, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and wherein said destination mobile station selects a channel when a radio channel to be switched is retrieved during an incoming call or communication, said channel being one selected from an initial value among j (natural number) radio channels spaced apart by an interval i (natural number), said initial value being n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number).

Claim 65

An originating mobile station for a mobile station to mobile station direct communications system, said originating mobile station being used in a wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station; said originating mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station, comprising: channel selecting means for selecting a channel used as a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding a destination mobile station, wherein said channel selecting means selects said channel based on information regarding a call number of said destination mobile station, and wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a carrier to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 66

An originating mobile station for a mobile station to mobile station direct communications system, said originating mobile station being used in a wireless telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicating with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station; said originating mobile station among mobile stations which can establish mobile station to mobile station direct communications without involving a base station, comprising: channel selecting means for selecting a channel used as a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding a destination mobile station, wherein said channel selecting means selects said channel based on information regarding a call number of said destination mobile station, and wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a carrier to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 67

The originating mobile station for a mobile station to mobile station direct communications system according to claim 59, further comprising channel selecting changing means that changes a channel selection condition for said channel selecting means.

Claim 68

The originating mobile station for a mobile station to mobile station direct communications system according to claim 60, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.

Claim 69

A destination mobile station for a mobile station to mobile station direct communications system, said destination mobile station being used in a wireless handset telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicated with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station said destination mobile station mobile stations among mobile stations which can establish mobile station to mobile station direct communications without involving a base station comprising: channel selecting means for selecting a channel at the time of retrieving a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding said destination mobile station itself, wherein said channel selecting means selects a channel based on information regarding a self call number, and wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a channel to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 70

A destination mobile station for a mobile station to mobile station direct communications system, said destination mobile station being used in a wireless handset telephone system including plural mobile stations and a base station accommodating said plural mobile stations; a mobile station to base station communication channel being used when a mobile station among said plural mobile stations is communicated with said base station; plural mobile station to mobile station direct communication channels being used when said plural mobile stations are mutually communicating without involving a base station said destination mobile station mobile stations among mobile stations which can establish mobile station to mobile station direct communications without involving a base station comprising: channel selecting means for selecting a channel at the time of retrieving a radio channel to be switched to mobile station direct communication channels, during an incoming call or communication among said plural mobile station, based on information regarding said destination mobile station itself, wherein said channel selecting means selects a channel based on information regarding a self call number, and wherein said channel selecting means comprises initial value setting means for setting as an initial value a value of n (natural number) plus a remainder obtained by dividing the call number of said destination mobile station by L (natural number); and channel selecting means for selecting a channel to be used among j (natural number) radio channels spaced apart by an interval i (natural number), based on said initial value set by means of said initial value setting means.

Claim 71

The destination mobile station for a mobile station to mobile station direct communications system according to claim 62, further comprising channel selection changing means that changes a channel selecting condition for said channel selecting means.

Claim 72

The destination mobile station for a mobile station to mobile station direct communications system according to claim 63, wherein said channel selection changing means changes a channel selection condition in accordance with information inputted via operating means added to said originating mobile station.