Source: http://www.google.com/patents/US6285684?dq=oakley+D523,461&ei=qiI4T-CjGqXf0QHz_PSUCA
Timestamp: 2014-10-23 13:31:40
Document Index: 478341829

Matched Legal Cases: ['art 5', 'arts 5', 'arts 5', 'art 12', 'art 11', 'art 33', 'art 33']

Patent US6285684 - Mobile communication system, mobile terminal, base station, mobile switching ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA mobile communication system includes a mobile terminal, a base station, and a mobile switching station. The mobile terminal, the base station and the mobile switching station are constructed so that communication information and control information are transferred by an asynchronous transfer mode (ATM)...http://www.google.com/patents/US6285684?utm_source=gb-gplus-sharePatent US6285684 - Mobile communication system, mobile terminal, base station, mobile switching station and mobile communication control methodAdvanced Patent SearchPublication numberUS6285684 B1Publication typeGrantApplication numberUS 08/851,421Publication dateSep 4, 2001Filing dateMay 5, 1997Priority dateOct 30, 1996Fee statusLapsedPublication number08851421, 851421, US 6285684 B1, US 6285684B1, US-B1-6285684, US6285684 B1, US6285684B1InventorsNorio Suzuki, Noriko Samejima, Kazuhiko Tomita, Keiji Kameyama, Eiji MoritaOriginal AssigneeFujitsu LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (26), Referenced by (12), Classifications (12), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetMobile communication system, mobile terminal, base station, mobile switching station and mobile communication control methodUS 6285684 B1Abstract A mobile communication system includes a mobile terminal, a base station, and a mobile switching station. The mobile terminal, the base station and the mobile switching station are constructed so that communication information and control information are transferred by an asynchronous transfer mode (ATM) cell between the mobile terminal and the base station, between mobile switching station and the base station.
BACKGROUND OF THE INVENTION The present invention generally relates to mobile communication system, mobile terminals, base stations, mobile switching stations and mobile communication control method, and more particularly to a mobile communication system, a mobile terminal, a base station, a mobile switching station and a mobile communication control method which transfer information using asynchronous transfer mode (ATM) cells.
SUMMARY OF THE INVENTION Accordingly, it is a general object of the present invention to provide a novel and useful mobile communication system, a mobile terminal, a base station, a mobile switching station and a mobile communication control method, in which the problem described above is eliminated.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system block diagram showing an example of a conventional mobile communication system;
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a system block diagram showing an embodiment of a mobile communication system according to the present invention. The mobile communication system shown in FIG. 2 includes mobile terminals 1 1 through 1 k, base stations 2 1 through 2 m, mobile switching stations 3 1 and 3 2, a general switched network 4, and general telephone terminals 6. A message box part 5 is provided in each of the mobile switching stations 3 1 and 3 2. ATM cells are transferred between the mobile terminals 1 1 through 1 k and the base stations 2 1 through 2 m, between the base stations 2 1 through 2 m and the mobile switching stations 3 1 and 3 2, and between the mobile switching stations 3 1 and 3 1. In other words, the ATM cells are transferred between the mobile switching stations 3 1 and 3 2 when the mobile switching station is switched depending on the communication between the mobile terminals or depending on the movement of the mobile terminal.
The ATM cells have a construction which is approximately the same as the known ATM cell used in a broad band integrated services digital network (B-ISDN), and a cell header part is added to a 48-byte information part. For example, the header part is made up of 6 bytes, and includes a mobile switching station number and a message box number corresponding to a virtual path identifier (VPI) and a virtual channel identifier (VCI), a base station number of the base station which relays the ATM cells and a mobile switching station number which accommodates this base station, a received signal intensity at this base station, a cell number indicating the order of the ATM cells, and the like. On the other hand, the information part includes a signal type such as �call-out�, audio information, control information and the like. The message box parts 5 are assigned at the start of the communication of the mobile terminals 1 1 through 1 k, and the ATM cells are transferred via the message box parts 5.
FIG. 7 shows an ATM cell (A) having a basic structure. The ATM cell (A) shown in FIG. 7 includes a 48-byte information part, and a 6-byte cell header part. The cell header part includes regions of an 8-bit mobile switching station number (MSC number) and a 16-bit message box number (MBOX number), a 4-bit cell number, a 4-bit received signal intensity, and an 8-bit base station accommodating MSC number and an 8-bit base station number. On the other hand, the information part includes regions of the signal type indicative of the cell type such as �call-out�, audio information, and control information.
FIG. 8 shows a call-out cell (B). The mobile terminal can identify the base station number from the simultaneous broadcasts from the base stations within the service areas to which the location of the mobile terminal belongs. Hence, when making the call-out, the cell number and the base station number are written in the cell header part of the ATM cell. In addition, the signal type which is �call-out�in this case, the mobile terminal number which indicates the mobile terminal which makes the call-out, the authentication number, the called number which indicates the other party, the call type and the like are written in the information part of the ATM cell. Such processes are carried out by controlling the transmitting cell assembling part 12 from the control processor 14 shown in FIG. 3, and the call-out cell (B) is transmitted from the radio transmitter/receiver part 11. In this case, the region of the MSC number and the MBOX number and the region of the received signal intensity are empty.
The call accept cell (C) shown in FIG. 9A is transferred by writing the mobile switching station number of the mobile switching station which carried out the call accept process and assigned the communication message box part 33 as described above in conjunction with FIGS.5 and 6 and the message box number of this communication message box part 33 in the region of the MSC number and the MBOX number in the cell header part. In addition, the cell number, the base station number and the mobile switching station number of the mobile switching station which accommodates this base station are also written in the cell header part of the call accept cell (C) upon transfer thereof. On the other hand, the signal type which is �call accept�in this case, the mobile terminal number, and the communication channel number allocated to the mobile terminal are written in the information part of the call accept cell (C) upon transfer thereof.
The respond cell (D) shown in FIG. 9B is transmitted to the mobile terminal which made the call-out in response to the call-out cell (C), from the mobile switching station via the base station. The contents of the cell header part of the respond cell (D) are the same as those of the call-out cell (C). In the information part of the respond cell (D), �respond�is written as the signal type.
The contents of the cell header part of the disconnect cell (E) shown in FIG. 10A are the same as those of the respond cell (D). In the information part of the disconnect cell (E), �disconnect�is written as the signal type.
The contents of the cell header of the disconnect confirmation cell (F) shown in FIG. 10B are the same as those of the disconnect cell (E). In the information part of the disconnect confirmation cell (F), �disconnect confirmation�is written as the signal type.
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