EP0734191A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Mobile communication system, communication method, and mobile station device
Assignee: NTT Docomo Inc
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Filing: 1995-10-09
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Granted: —
•
Expires: 2015-10-09
Abstract
Abstract The technique will be applied, in the case where a data communication fixed station 3 and a voice communication fixed station 4 control a common service area, and will quicken connection between a mobile station 5 and the data communication fixed station 3. The data communication fixed station 3 notifies, sequentially, the voice communication fixed station 4 of channel informations (e.g., usable channels, traffic quantity). The voice communication fixed station 4 receives the channel information via a broadcast channel for voice communication, and broadcasts the channel information to the mobile stations. When the mobile station 5 is to execute packet communication with an ISDN 1 via the data communication fixed station 3, the mobile station 5 selects an appropriate channel among the channels broadcasted thereto, and notifies the data communication fixed station 3 of the selected channel. As such, since the mobile station 5 can determine the channel before the actual communication between the mobile station 5 and the data communication fixed station 3 takes place, the connection between the mobile station 5 and the data communication fixed station 3 can be quickened.
Inventors
- 👤 Noriko Uchida
- 👤 Akihiro Maebara
- 👤 Katsumi Kobayashi
- 👤 Koji Yamamoto
- 👤 Syoichi 1-107 NTT Oumebashi-syataku HIRATA
- 👤 Kazuo Sugiyama
- 👤 Masumi Sotoyama
- 👤 Koji Sasada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/08; H04W48/12; H04B; H04B7/00; H04B7/24; H04B7/26; H04W88/00; H04W88/02; H04W88/06; H04W88/08; H04W88/10
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
45 words
A mobile communication system comprising: a master system provided with a control channel for controlling a prespecified service area; and at least one slave system for controlling the service area identical with the service area of the master system, and for utilizing the control channel.
Claim 2
Dependent Claim
45 words
A mobile communication system according to claim 1, further comprising: a mobile station for communicating with the slave system; a transferring means for transferring, an information required for communication between the mobile station and the slave system, via the control channel in the master system.
Claim 3
Dependent Claim
41 words
A mobile communication system according to claim 1, wherein the control channel is a level measuring channel, further comprising: a mobile station for measuring a reception field level of the control channel so as to judge a zone to be visited.
Claim 4
Dependent Claim
55 words
A mobile communication system according to claim 2, wherein said transferring means transfers, to the mobile station via the master system, a communication request issued in the slave system, the mobile station further comprising: means for waiting, the communication request via the master system if the communication with the slave system does not takes place.
Claim 5
Dependent Claim
102 words
A mobile communication system according to claim 4, the slave system further comprising: means for judging, the mobile station being a first mobile station which is communicable with the master system or being a second mobile station which is incommunicable with the master system; means for notifying the first mobile station, of the communication request via the master system; and means for notifying the second mobile station, of the communication request without using the master system; whereby the first mobile station waits the communication request from the master system, and the second mobile station waits the communication request from the slave system.
Claim 6
Dependent Claim
29 words
A mobile communication system according to any of claims 4 and 5, further characterized in that the master system has an omni-structure, and the slave system has a sector-structure.
Claim 7
Dependent Claim
29 words
A mobile communication system according to any of claims 4 and 5, further characterized in that the master system has a sector-structure, and the slave system has an omni-structure.
Claim 8
Dependent Claim
27 words
A mobile communication system according to claim 2, further characterized in that the master system notifies the mobile station, of a traffic channel of the slave system.
Claim 9
Dependent Claim
67 words
A mobile communication system according to claim 2, further characterized in that the master system notifies the mobile station, of traffic channels of a zone of the slave system, the zone is identical with the zone of the master system in which the mobile station is visiting; and that the mobile station select a traffic channel to be used on the basis of the traffic channels notified.
Claim 10
Dependent Claim
83 words
A mobile communication system according to claim 2, further characterized in that the master system notifies the mobile station of a traffic channel of a zone of the slave system, the zone is adjoining another zone of the slave system, and the other zone is identical with the zone of the master system in which the mobile station is visiting; and that the mobile station selects a zone and a traffic channel to be used on the basis of the traffic channels notified.
Claim 11
Dependent Claim
25 words
A mobile communication system according to claim 9, further characterized in that the master system has a sector-structure, and the slave system has an omni-structure.
Claim 12
Dependent Claim
49 words
A mobile communication system according to claim 11, further characterized in that the master system notifies mobile stations of a common information, wherein the mobile stations are visiting, respectively, a plurality of zones of the master system, the plurality of zones corresponding to a zone in the slave system.
Claim 13
Dependent Claim
48 words
A mobile communication system according to claim 11, further characterized in that the master system notifies mobile stations of different informations, wherein the mobile stations are visiting, respectively, a plurality of zones of the master system, the plurality of zones corresponding to a zone in the slave system.
Claim 14
Dependent Claim
44 words
A mobile communication system according to claim 9, further characterized in that the master system has an omni-structure, and the slave system has a sector-structure; and that the mobile station measures levels of usable traffic channels, before selecting the traffic channel to be used.
Claim 15
Dependent Claim
33 words
A mobile communication system according to claim 14, further characterized in that the master system notifies each mobile stations in the zones of the slave system, of at least one each traffic channel.
Claim 16
Dependent Claim
88 words
A mobile communication system according to claim 14, wherein the master system further comprising means for notifying the mobile station of an information identifying a zone in the slave system together with the traffic channel; and the mobile station further comprising: means for selecting, among the traffic channels corresponding to the zones of the slave system, one each traffic channel for the zones; means for measuring reception field levels of the zones selected; and means for determining a zone to be visited on the basis of measured results.
Claim 17
Dependent Claim
25 words
A mobile communication system according to claim 10, further characterized in that the master system has a sector-structure, and the slave system has an omni-structure.
Claim 18
Dependent Claim
25 words
A mobile communication system according to claim 10, further characterized in that the master system has an omni-structure, and the slave system has a sector-structure.
Claim 19
Dependent Claim
57 words
A mobile communication system according to claim 3, further characterized in that the master system comprises means for notifying the mobile stations of the level measuring channel of a peripheral zone; and that the mobile station comprises means for measuring reception field level of the level measuring channel when the mobile station communicates with the slave system.
Claim 20
Dependent Claim
57 words
A mobile communication system according to claim 3, further characterized in that the slave system comprises means for notifying the mobile stations of the level measuring channel of a peripheral zone; and that the mobile station comprises means for measuring reception field level of the level measuring channel when the mobile station communicates with the slave system.
Claim 21
Dependent Claim
61 words
A mobile communication system according to claim 19, wherein the master system has a sector-structure and the slave system has an omni-structure, the master system further comprising: means for notifying the mobile station of the level measuring channel of the zone of the master system, the zone adjoining another zone of the master system in which the mobile station is visiting.
Claim 22
Dependent Claim
50 words
A mobile communication system according to claim 21, the master system further comprising: means for notifying, of an information together with the level measuring channel, the information concerning at least one zone in the slave system and identifying the fact that the level measuring channel is included in the zone.
Claim 23
Dependent Claim
53 words
A mobile communication system according to claim 21, the master system further comprising: means for notifying, of an information together with the level measuring channel, the information concerning a zone in which the mobile station is visiting, and the information identifying the fact that the level measuring channel is included in the zone.
Claim 24
Dependent Claim
61 words
A mobile communication system according to claim 19, wherein the master system has a sector-structure and the slave system has an omni-structure, the master system further comprising: means for notifying the mobile station of the level measuring channel of the zone of the master system, the zone adjoining another zone of the slave system in which the mobile station is visiting.
Claim 25
Dependent Claim
86 words
A mobile communication system according to claim 24, wherein the master system further comprising: means for notifying the mobile station of other level measuring channels together with the level measuring channel of which the mobile station is notified, wherein the other level measuring channels are provided in a zone of the slave system, the zone in which the mobile station is visiting; and means for notifying, of an information concerning at least one of the level measuring channels and identifying corresponding zone in the slave system.
Claim 26
Dependent Claim
33 words
A mobile communication system according to claim 25, further characterized in that the zone the mobile station being notified of is provided in the slave system, and is visited by the mobile station.
Claim 27
Dependent Claim
61 words
A mobile communication system according to claim 20, wherein the master system has a sector-structure and the slave system has an omni-structure, the slave system further comprising: means for notifying the mobile station, of the level measuring channel of the zone of the master system, the zone adjoining another zone of the slave system in which the mobile station is visiting.
Claim 28
Dependent Claim
89 words
A mobile communication system according to claim 27, wherein the slave system further comprising: means for notifying the mobile station, of other level measuring channels together with the level measuring channel of which the mobile station is to be notified, wherein the other level measuring channels are provided in a zone of the slave system, the zone in which the mobile station is visiting; and means for notifying of an information concerning at least one of the level measuring channels and identifying a corresponding zone in the slave system.
Claim 29
Dependent Claim
39 words
A mobile communication system according to claim 28, further characterized in that the zone of which the mobile station is to be notified is provided in the slave system, and that the zone is visited by the mobile station.
Claim 30
Dependent Claim
47 words
A mobile communication system according to claim 3, further characterized in that the mobile station comprises: memory means for storing, informations of the level measuring channels; and means for measuring, reception field levels of the level measuring channels when power of the mobile station is turned on.
Claim 31
Dependent Claim
25 words
A mobile communication system according to claim 30, further characterized in that the master system has a sector-structure, and the slave system has an omni-structure.
Claim 32
Dependent Claim
116 words
A mobile communication system according to claim 2, wherein the control channel comprises a level measuring channel, further characterized in: that the master system comprises means for notifying the mobile station, of traffic channels in the zone of the slave system via the control channel, the zone is identical with the zone of the master system in which the mobile station is visiting, and for notifying the mobile station of level measuring channels of peripheral zones; and that the mobile station comprises means for selecting, among the traffic channels supplied thereto, a traffic channel to be used, and means for judging a zone to be visited by measuring reception field levels of the level measuring channels.
Claim 33
Dependent Claim
121 words
A mobile communication system according to claim 2, wherein the control channel comprises a level measuring channel, further characterized in: that the master system comprises means for notifying the mobile station of traffic channels in the zone of the slave system via the control channel, the zone is identical with the zone of the master system in which the mobile station is visiting; that the slave system comprises means for notifying the mobile station of level measuring channels of peripheral zones; and that the mobile station comprises means for selecting, among the traffic channels supplied thereto, a traffic channel to be used, and means for judging a zone to be visited by measuring reception field levels of the level measuring channels.
Claim 34
Dependent Claim
27 words
A mobile communication system according to claim 20, further characterized in that the slave system notifies the mobile station of the traffic channels in the peripheral zones.
Claim 35
Dependent Claim
71 words
A mobile station communicable with a master system and a slave system, wherein the master system is provided with a control channel for controlling a prespecified service area, and the slave system controls the service area identical with the service area of the master system and utilizes the control channel, the mobile station comprising: communication request receiving means for receiving a communication request from the slave system via the master system.
Claim 36
Dependent Claim
74 words
A mobile station communicable with a master system and a slave system, wherein the master system is provided with a control channel for controlling a prespecified service area, and the slave system controls the service area identical with the service area of the master system and utilizes the control channel, the mobile station comprising: traffic channel receiving means for receiving, via the master system, an information representing usable traffic channels in the slave system.
Claim 37
Dependent Claim
101 words
A mobile station communicable with a master system and a slave system, wherein the master system is provided with a level measuring channel for controlling a prespecified service area, and the slave system controls the service area identical with the service area of the master system and utilizes control channel of the master system, the mobile station comprising: channel information receiving means for receiving, via the master system or the slave system, an information representing the level measuring channel; and measuring means for measuring, when the mobile station communicates with the slave system, reception field level of the level measuring channel.
Claim 38
Dependent Claim
24 words
A mobile station according to claim 37, further comprising: zone switching means for executing zone switching according to measured results of the measuring means.
Claim 39
Dependent Claim
91 words
A mobile station communicable with a master system and a slave system, wherein the master system is provided with a level measuring channel for controlling a prespecified service area, and the slave system controls the service area identical with the service area of the master system and utilizes control channel of the master system, the mobile station comprising: memory means for storing an information representing the level measuring channel; and measuring means for measuring, reception field levels of the level measuring channels when power of the mobile station is turned on.
Claim 40
Dependent Claim
38 words
A mobile communication system according to any of claims 1 to 34, further characterized in that either of the master system and the slave system is a voice communication system, and the other is a data communication system.
Claim 41
Dependent Claim
37 words
A mobile station according to any of claims 35 to 38, further characterized in that either of the master system and the slave system is a voice communication system, and the other is a data communication system.
Claim 42
Dependent Claim
230 words
In a method of communication utilized in a mobile communication system comprising a plurality of systems for controlling identical service areas, the systems are communicable with a mobile station, the improvement comprising steps of: specifying any of the system to be a master system; transferring, to the master system from any of the systems with exception of the master system, a communication request for the mobile station when the communication request is issued; receiving, in the master system, the communication request transferred by any of the systems with exception of the master system; executing, in the master system, information conversion of the communication request so as to identify the system being issued the communication request; broadcasting, to the mobile station from the master system, the communication request being executed the information conversion; selecting, in the mobile station, a communication means corresponding to the master system among a plurality of communication means which are provided previously, when the mobile station does not communicate with any system; identifying, in the mobile station, a system in which the communication request is issued, when the mobile station receives, via the communication means, the communication request being executed the information conversion; selecting, by the mobile station on the basis of the communication request, a communication means corresponding to the identified system; and communicating, with the system by the mobile station, via the selected communication means.
Claim 43
Dependent Claim
99 words
A mobile station comprising: a plurality of communication means for communicating with a plurality of systems; switching means for selecting, any of the communication means; and mobile station control means for selecting, by means of the switching means, a communication means corresponding to a specific system among the plurality of communication means when a communication does not takes place; for identifying, on the basis of the communication request, a system in which the communication request is issued, when the communication request is received by the selected switching means; and for selecting a communication means corresponding to the identified system.
Claim 44
Dependent Claim
57 words
A channel notification equipment comprising: a master system for transmitting, to mobile stations visiting prespecified service area, first information via a level measuring channel; a slave system for transmitting, to the mobile station, a second information via a traffic channel; and an information creating means for including an information representing the traffic channel among the first information.
Claim 45
Dependent Claim
58 words
A channel notification equipment according to claim 44, further characterized in that the master system is a voice communication fixed station; that the slave system is a data communication fixed station, the service area of which is identical with the service area of the master system; and that the first information includes an information specifying the traffic channel.
Claim 46
Dependent Claim
110 words
A channel notification equipment according to any of claims 44 and 45, further comprising: communication request receiving means for receiving, from external, a communication request for sending the second information into the mobile station; mobile station type judging means for judging whether or not the mobile station being communicable with the master system; first calling means for calling, if the mobile station is communicable with the master system, the mobile station via the master system when the communication request is received; and second calling means for calling, if the mobile station is incommunicable with the master system, the mobile station via the slave system when the communication request is received.
Claim 47
Dependent Claim
110 words
In a fixed station system for mobile communication, comprising: a master system for transmitting, to a mobile station, a first information via a first traffic channel when the mobile station is visiting a first zone; and an adjacent system provided with a level measuring channel having a constant level, the adjacent system transmits, to the mobile station, the first information when the mobile station is visiting a second zone which is adjoining the first zone; the improvement comprising: a slave system for transmitting, via a second traffic channel, a second information when the mobile station visiting the first zone, and for broadcasting the level measuring channel to the mobile station.
Claim 48
Dependent Claim
58 words
A fixed station system for mobile communication according to claim 47, further characterized in that the slave system comprises a channel information supplying means for supplying, to the master system, an information specifying the second traffic channel; and that the master system comprises a channel information broadcasting means for broadcasting the second traffic channel to the mobile station.
Claim 49
Dependent Claim
30 words
A fixed station system for mobile communication according to claim 47, further characterized in that the slave system broadcasts, to the mobile station, a traffic channel in the second zone.
Claim 50
Dependent Claim
83 words
A mobile station for mobile communication, comprising: a first communication device for communicating with a master system via a first traffic channel; an electrical field power level measuring apparatus for measuring, an electrical field power level of a prespecified level measuring channel of the master system; a second communication device for communicating with a slave system via a second traffic channel; and a level measuring information receiving means for obtaining the level measuring channel from a signal received via the second traffic channel.
Claim 51
Dependent Claim
122 words
A mobile station for mobile communication according to claim 50, wherein the level measuring channel broadcasts candidates for the second traffic channel, the mobile station further comprising: channel candidate memory means for storing a plurality of candidates for the level measuring channel; level measuring channel determination means for reading out the candidates stored in the channel candidate memory means when power of the mobile station is turned on, for scanning the read out channel candidates, sequentially, and for determining a candidate having the highest reception field level to be the level measuring channel; and traffic channel determination means for selecting a candidate among the candidates for the second traffic channel so as to set the selected candidate into the second traffic channel.
References Cited (Backward Citations)
No citation records indexed.
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