Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected

Claim 5

An MCC (102) accommodating a plurality of base stations (103, 104, 105), each of which is capable of setting up a communication channel with a mobile station (106, 107, 108, 169) for interchanging communication data, and controlling switching of the communication channel to be effected between two or more of said plurality of base stations and said mobile station, CHARACTERIZED BY comprising: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station.

Claim 6

An MCC (102) accommodating a plurality of base stations (103, 104, 105), each of which is capable of setting up a communication channel with a mobile station (106, 107, 108, 169) for interchanging communication data, and controlling switching of the communication channel to be effected between two or more of said plurality of base stations and said mobile station, CHARACTERIZED BY comprising: an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched.

Claim 7

An MCC in accordance with claim 6, CHARACTERIZED BY further comprising a clock feeding circuit (209) for feeding a same clock indicative of an operation timing to said plurality of base stations.

Claim 8

An MCC (102) accommodating a plurality of base stations (103, 104, 105), each of which is capable of setting up a communication channel with a mobile station (106, 107, 108, 169) for interchanging communication data, and controlling switching of the communication channel to be effected between two or more of said plurality of base stations and said mobile station, CHARACTERIZED BY comprising: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; an ID code adding circuit (203) for decomposing data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched.

Claim 9

An MCC (102) accommodating a plurality of base stations (103, 104, 105), each of which is capable of setting up a communication channel with a mobile station (106, 107, 108, 169) for interchanging communication data, and controlling switching of the communication channel to be effected between two or more of said plurality of base stations and said mobile station, CHARACTERIZED BY comprising: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations.

Claim 10

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations (106, 107, 108, 169) via a respective communication channel, CHARACTERIZED BY comprising: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with said mobile station a transmission frame period based on a clock generated inside of said base station; and a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said other base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said information to said other base station.

Claim 11

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations via a respective communication channel, CHARACTERIZED BY comprising: a phase correcting circuit (306) for correcting, on receiving from another base station phase difference information representative of a difference between a transmission phase of a frame period signal sent from said base station to a mobile station expected to newly set up a communication channel with said base station and a transmission phase of a frame period signal sent from said other base station currently holding a communication channel with said mobile station, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up.

Claim 12

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations via a respective communication channel, CHARACTERIZED BY comprising: an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to switching of a communication channel and if said base station is holding a communication channel with a mobile station relating to the switching, an ID code corresponding to leading data of a next frame period determined in consideration of another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand.

Claim 13

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations via a respective communication channel, CHARACTERIZED BY comprising: a transmission frame generating circuit (306) for identifying, on receiving from another base station currently holding a communication channel with a mobile station expected to be handled by said base station an ID code added to leading data of a next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data.

Claim 14

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations (106, 107, 108, 169) via a respective communication channel, CHARACTERIZED BY comprising: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with said base station a transmission frame period based on a clock generated inside of said base station; a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said other base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said phase difference information to said other base station; a phase correcting circuit (306) for correcting, when said base station receives said phase difference information, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to the switching of the communication channel and if said base station is holding the communication channel with said mobile station, an ID code corresponding to leading data of a next frame period determined in consideration of said another base station expected to newly set up a communication channel with said mobile station to said another base station beforehand; and a transmission frame generating circuit (306) for identifying, when said base station receives said ID code added to leading data of the next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data.

Claim 15

A base station (103, 104, 105) accommodated in an MCC (102) together with other base stations and capable of interchanging particular data with each of one or more mobile stations (106, 107, 108, 169) via a respective communication channel, CHARACTERIZED BY comprising: an error detecting circuit (311) for determining, at the time of switching of a communication channel, a degree of reliability of data received from a mobile station and demodulated on the basis of a result of error correction; and a reliability information adding circuit (311) for adding said degree of reliability to said data as reliability information, and sending said data and said reliability information to said MCC.

Claim 16

A mobile station (106, 107, 108, 169) for interchanging communication data via a communication channel with a base station (103, 104, 105) controlling a service area in which said mobile station is located; CHARACTERIZED BY comprising: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 17

A mobile station in accordance with claim 16, CHARACTERIZED BY further comprising a demodulating circuit (404) for combining and demodulating a signal received from said first base station and a signal received from said second base station.

Claim 18

A mobile station in accordance with claim 16, CHARACTERIZED BY further comprising: a receipt condition measuring circuit (415) for measuring receipt conditions of a signal received from each of a plurality of base stations including a base station currently holding a communication channel; and a receipt condition reporting circuit (411) for reporting said receipt conditions to said base station currently holding a communication channel with said mobile station as receipt condition information.

Claim 19

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 109, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 108) for reporting phase difference information, which any one of said plurality of mobile stations sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel with the base station or expected to newly hold a communication channel with said base station a transmission frame period based on a clock generated inside of said base station; and a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said first base station to another service area defined by said second base station adjoining said first base station sends said phase difference information to said base station, said phase difference information to said second base station; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting the difference between the transmission phase of the frame synchronizing signal received from said first base station and the transmission phase of the frame synchronizing signal received from said second base station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 20

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (411) for reporting phase difference information, which any one of said plurality of mobile stations sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: a phase correcting circuit (306) for correcting, on receiving from another base station phase difference information representative of a difference between a transmission phase of a frame period signal sent from said base station to a mobile station expected to newly set up a communication channel with said base station and a transmission phase of a frame period signal sent from said another base station currently holding a communication channel with said mobile station, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting the difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with the mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as said phase difference information.

Claim 21

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which any one of said plurality of mobile station sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to switching of a communication channel and if the base station is holding a communication channel with a mobile station relating to the switching, an ID code corresponding to leading data of a next frame period determined in consideration of another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with the mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as said phase difference information.

Claim 22

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which any one of said plurality of mobile station sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: a transmission frame generating circuit (306) for identifying, on receiving from another base station currently holding a communication channel with a mobile station expected to be handled by the base station an ID code added to leading data of a next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting the difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with the mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as said phase difference information.

Claim 23

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which any one of said plurality of mobile station sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with the base station a transmission frame period based on a clock generated inside of said base station; and a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said other base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said phase difference information to said other base station; a phase correcting circuit (306) for correcting, when said base station receives said phase difference information, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to the switching of the communication channel and if said base station is holding the communication channel with said mobile station, an ID code corresponding to leading data of a next frame period determined in consideration of said another base station expected to newly set up a communication channel with said mobile station to said another base station beforehand; and a transmission frame generating circuit (306) for identifying, when said base station receives said ID code added to leading data of the next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 24

A mobile communication system comprising at least one MCC (102) connected to a communication network(101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which any one of said plurality of mobile station sent to a first base station currently holding a communication channel with the mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel with said mobile station, to said second base station; said plurality of base stations each comprises: an error detecting circuit (311) for determining, at the time of switching of a communication channel, a degree of reliability of data received from a mobile station and demodulated on the basis of a result of error correction; and a reliability information adding circuit (311) for adding said degree of reliability to said data as reliability information, and sending said data and said reliability information to said MCC; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 25

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: an ID code adding circuit (203) for decomposing data to be sent to any one of said plurality of mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which a communication channel may be switched; said plurality of base stations each comprises: a phase correcting circuit (306) for correcting, on receiving from another base station phase difference information representative of a difference between a transmission phase of a frame period signal sent from said base station to a mobile station expected to newly set up a communication channel with said base station and a transmission phase of a frame period signal sent from said other base station currently holding a communication channel with said mobile station, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 26

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: an ID code adding circuit (203) for decomposing data to be sent to any one of said plurality of mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which a communication channel may be switched; said plurality of base stations each comprises: an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to switching of a communication channel and if said base station is holding a communication channel with a mobile station relating to the switching, an ID code corresponding to leading data of a next frame period determined in consideration of another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 27

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: an ID code adding circuit (203) for decomposing data to be sent to any one of said plurality of mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which a communication channel may be switched; said plurality of base stations each comprises: a transmission frame generating circuit (306) for identifying, on receiving from another base station currently holding a communication channel with a mobile station expected to be handled by said base station an ID code added to leading data of a next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 28

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: an ID code adding circuit (203) for decomposing data to be sent to any one of said plurality of mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which a communication channel may be switched; said plurality of base stations each comprises: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with said base station a transmission frame period based on a clock generated inside of said base station; and a phase difference reporting circuit 301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said other base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said phase difference information to said other base station; a phase correcting circuit (306) for correcting, when said base station is assumed to be said another base station expected to newly set up a communication channel and receives said phase difference information, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to the switching of the communication channel and if said base station is holding the communication channel with said mobile station, an ID code corresponding to leading data of a next frame period determined in consideration of said another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and a transmission frame generating circuit (306) for identifying, when said base station is assumed to be said other base station expected to newly set up a communication channel and receives said ID code added to leading data of the next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 29

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: an ID code adding circuit (203) for decomposing data to be sent to any one of said plurality of mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which a communication channel may be switched; said plurality of base stations each comprises: an error detecting circuit (311) for determining, at the time of switching of a communication channel, a degree of reliability of data received from a mobile station and demodulated on the basis of a result of error correction; and a reliability information adding circuit (311) for adding said degree of reliability to said data as reliability information, and sending said data and said reliability information to said MCC; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 30

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel, to said second base station; an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched; said plurality of base stations each comprises: a phase correcting circuit (306) for correcting, on receiving from another base station phase difference information representative of a difference between a transmission phase of a frame period signal sent from said base station to a mobile station expected to newly set up a communication channel with said base station and a transmission phase of a frame period signal sent from said other base station currently holding a communication channel with said mobile station, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 31

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel, to said second base station; an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched; said plurality of base stations each comprises: an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to switching of a communication channel and if said base station is holding a communication channel with a mobile station relating to the switching, an ID code corresponding to leading data of a next frame period determined in consideration of another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 32

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations(106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel, to said second base station; an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched; said plurality of base stations each comprises: a transmission frame generating circuit (306) for identifying, on receiving from another base station currently holding a communication channel with a mobile station expected to be handled by said base station an ID code added to leading data of a next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 33

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 207, 208) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel, to said second base station; an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched; said plurality of base stations each comprises: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with said base station a transmission frame period based on a clock generated inside of said base station; and a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said another base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said phase difference information to said other base station; a phase correcting circuit (306) for correcting, when said base station is assumed to be said another base station expected to newly set up a communication channel and receives said phase difference information, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to the switching of the communication channel and if said base station is holding the communication channel with said mobile station, an ID code corresponding to leading data of a next frame period determined in consideration of said other base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and a transmission frame generating circuit (306) for identifying, when said base station is assumed to be said other base station expected to newly set up a communication channel and receives said ID code added to leading data of the next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 34

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a phase difference reporting circuit (205, 107, 108) for reporting phase difference information, which said mobile station sent to a first base station currently holding a communication channel with said mobile station by determining a difference between a transmission phase of said first base station and a transmission phase of a second base station expected to newly set up a communication channel, to said second base station; an ID code adding circuit (203) for decomposing the data to be sent to said mobile station into data having a unit time interval shorter than a frame length, and adding an unconditional ID code to each of decomposed data; and a multicasting circuit (205) for multicasting same data with said ID code to two or more of said plurality of base stations to which the communication channel may be switched; said plurality of base stations each comprises: an error detecting circuit (311) for determining, at the time of switching of a communication channel, a degree of reliability of data received from a mobile station and demodulated on the basis of a result of error correction; and a reliability information adding circuit ((311) for adding said degree of reliability to said data as reliability information, and sending said data and said reliability information to said MCC; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 35

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations; said plurality of base stations each comprises: a phase correcting circuit (306) for correcting, on receiving from another base station phase difference information representative of a difference between a transmission phase of a frame period signal sent from said base station to a mobile station expected to newly set up a communication channel with said base station and a transmission phase of a frame period signal sent from said another base station currently holding a communication channel with said mobile station, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 36

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations; said plurality of base stations each comprises: an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to switching of a communication channel and if said base station is holding a communication channel with a mobile station relating to the switching, an ID code corresponding to leading data of a next frame period determined in consideration of another base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 37

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations; said plurality of base stations each comprises: a transmission frame generating circuit (306) for identifying, on receiving from another base station currently holding a communication channel with a mobile station expected to be handled by said base station an ID code added to leading data of a next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 38

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations; said plurality of base stations each comprises: a synchronizing signal sending circuit (307) for sending to a mobile station currently holding a communication channel or expected to set up a communication channel with said base station a transmission frame period based on a clock generated inside of said base station; a phase difference reporting circuit (301, 303, 304, 306, 307, 309, 310, 312, 313, 315) for reporting, when said mobile station moving from a service area defined by said base station to another service area defined by another base station adjoining said base station sends to said base station phase difference information representative of a difference between a transmission phase of a frame synchronizing signal received from said other base station expected to newly set up a communication channel and a transmission phase of a frame synchronizing signal received from said base station, said phase difference information to said other base station; a phase correcting circuit (306) for correcting, when said base station is assumed to be said another base station expected to newly set up a communication channel and receives said phase difference information, a phase of a transmission frame synchronizing signal of said communication channel to be newly set up; an ID code reporting circuit (306) for reporting, when said MCC multicasts same communication data meant for two or more base stations relating to the switching of the communication channel and if said base station is holding the communication channel with said mobile station, an ID code corresponding to leading data of a next frame period determined in consideration of said other base station expected to newly set up a communication channel with said mobile station to said other base station beforehand; and a transmission frame generating circuit (306) for identifying, when said base station is assumed to be said other base station expected to newly set up a communication channel and receives said ID code added to leading data of the next frame period, communication data designated by said ID code out of communication data multicast by said MCC, and generating a next transmission frame having the identified communication data as leading data; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 39

A mobile communication system comprising at least one MCC (102) connected to a communication network (101), a plurality of base stations (103, 104, 105) connected to said MCC, and a plurality of mobile stations (106, 107, 108, 169) each being connected to at least one of said plurality of base stations; CHARACTERIZED IN THAT said MCC comprises: a selective combining circuit (210) for selectively combining, when said MCC receives data which two or more of said plurality of base stations joining in the switching individually received from said mobile station and demodulated from the two or more base stations, said data on the basis of reliability information added to said data by said two or more base stations; said plurality of base stations each comprises: an error detecting circuit (311) for determining, at the time of switching of a communication channel, a degree of reliability of data received from a mobile station and demodulated on the basis of a result of error correction; and a reliability information adding circuit (311) for adding said degree of reliability to said data as reliability information, and sending said data and said reliability information to said MCC; and said plurality of mobile stations each comprises: a phase difference detecting circuit (413) for detecting a difference between a transmission phase of a frame synchronizing signal received from a first base station currently holding a communication channel with said mobile station and a transmission phase of a frame synchronizing signal received from a second base station expected to newly set up a communication channel with said mobile station; and a phase difference reporting circuit (411) for reporting said difference to said first base station as phase difference information.

Claim 40

A handover control device for executing, when a mobile station (106, 107, 108, 169) in communication moves from one sector to another sector in a same cell or from one of adjoining sectors to the other sector, handover between said mobile station and one or more base stations (103, 104, 105), CHARACTERIZED BY comprising: a modulation coding circuit for modulation coding, when the handover occurs between sectors belonging to a same cell, down-going data meant for said mobile station into a plurality of data and modulation coding said plurality of data; and a destination selecting circuit for selectively distributing said plurality of data to transmitting circuits assigned to the sectors respectively corresponding to said plurality of data.

Claim 41

A device in accordance with claim 40, CHARACTERIZED IN THAT priority is given to handover between the sectors belonging to the same cell over handover between the adjoining sectors.

Claim 42

A device as claimed in claim 40, CHARACTERIZED IN THAT said modulation coding circuit modulation codes each of said plurality of data by using a particular spread code preselected on a sector basis.