GB2260468A - Portable radio telephone - Google Patents
Portable radio telephone Download PDFInfo
- Publication number
- GB2260468A GB2260468A GB9221072A GB9221072A GB2260468A GB 2260468 A GB2260468 A GB 2260468A GB 9221072 A GB9221072 A GB 9221072A GB 9221072 A GB9221072 A GB 9221072A GB 2260468 A GB2260468 A GB 2260468A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cmts
- mcs
- portable radio
- double
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
This equipment monitors the control channel number of a cellular mobile telephone system, (CMTS), through a radio transmission section (24) and a control section (26) for common use to CMTS and a microcellular system, (MCS), and answers a call from a base station or performs transmission. On the other hand, this equipment selectively receives the control channel number of MCS and answers a call from a base station or performs transmission. Either one of these actions is automatically selected on the basis of the reception level and system ID of the control channel number. At this time, standby-state reception is performed on the judgement as to which one of CMTS and MCS is to be accessed, by automatically detecting the positional condition of the equipment in use. When the equipment is moved to a different area in CMTS or MCS, either one of CMTS and MCS is automatically accessed after position registration. <IMAGE>
Description
BACKGROUND OF THE INVENTION
The present invention relates to a portable radio telephone equipment for common use for a cellular mobile telephone system (CMTS) and a micro cellular system (MCS), in which the frequency can be used in common so that either one of CMTS and MCS can be accessed automatically.
Heretofore, the cellular mobile telephone system (hereinafter also referred to as CMTS) has been used as a mobile communication system. On the other hand, the micro cellular system (hereinafter also referred to as MCS) has been used as a radio communication system using feeble radio wave in a limited range such as the inside of a building. The CMTS and the MCS respectively use frequency bands provided separately from each other.
SUMMARY OF THE INVENTION
In the CMTS, the service area is restricted by using a directional antenna. In this case, the frequency band used for the CMTS can be used for the MCS in a specific place such as the inside of a building located in an area of small electric field intensity outside the service area (beam area) restricted by the directional antenna. In the present state, however, the frequency band used for the CMTS is not used for the MCS, that is, effective use of frequency is not made. Furthermore, there has been no precedent for use of frequency in common to the CMTS and the MCS and for use of a portable radio telephone equipment in common. Accordingly, there arises a disadvantage in that efficiency both in use of radio wave and in use of equipment is poor.
The present invention has as its object the provision of an excellent CMTS/MCS double-use portable radio telephone equipment which can be used for CMTS and
MCS in common in the double sense of frequency and equipment to improve efficiency both in use of frequency and in use of equipment to thereby eliminate the aforementioned disadvantage in the prior art.
In addressing the foregoing object, the
CMTS/MCS double-use portable radio telephone equipment comprises: CMTS response transmission means for answering a call from a CMTS base station or for performing transmission through monitoring control channels of CMTS; MCS response transmission means for answering a call from an
MCS base station or for performing transmission through selectively receiving control channels of MCS; and selection means for automatically selecting either one of the CMTS response transmission means and the MCS response transmission means on the basis of the reception level and identification number of the control channels.
According to the CMTS/MCS double-use portable radio telephone equipment, the positional condition of the equipment in use is automatically detected so that standby-state reception is performed on the judgment as to whether CMTS or MCS is to be accessed. Furthermore, when the equipment is moved to a different area in CMTS or MCS, either one of CMTS and MCS is automatically accessed after position registration. As a result, both the frequency and equipment can be used in common to CMTS and MCS, so that the efficiency both in use of frequency and in use of equipment can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a diagram showing the general configuration of the CMTS and MCS using a CMTS/MCS double-use portable radio telephone equipment according to the present invention;
Fig. 2 is a block diagram showing the configuration of the CMTS/MCS double-use portable radio telephone equipment as an embodiment of the present invention; and
Fig. 3 is a flow chart showing a series of procedure for the operation of the equipment in the embodiment depicted in Fig. 2.
DESCRIPTION OF PREFERRED EMBODIMENT
An embodiment of the present invention as to the CMTS/MCS double-use portable radio telephone equipment will be described below with reference to the drawings.
Fig. 1 shows the configuration of the CMTS and
MCS. In Fig. 1, the reference numeral 1 designates a wire telephone equipment, 2 an end telephone office (E.O), 3 a mobile telephone office, 4 a CMTS terminal equipment, 5 (5a, 5b to 5n) radio base stations, 6 a base station antenna, 7 a mobile telephone equipment, 8 an MCS terminal equipment in a building or the like, 9 an MCS base station, and 10 a CMTS/MCS double-use portable radio telephone equipment.
Fig. 2 shows the configuration of the CMTS/MCS double-use portable telephone equipment 10. In Fig. 2, the reference numeral 21 designates an antenna, 22 an antenna distributor for transmission and reception, 23 a radio receiver section used in common to the CMTS and
MCS, 24 a radio transmitter section used in common to the
CMTS and MCS, and 25 a local oscillation circuit constituted by a frequency synthesizer for outputting an oscillation signal for frequency conversion in the radio receiver section 23 and the radio transmitter section 24.
The reference numeral 26 designates a control section for performing control for communication connection to the
CMTS or MCS and so on, the control section 26 being provided with a memory 34 in the inside or outside thereof. The reference numeral 27 designates a telephone receiver, 28 a telephone transmitter, 29 a display unit for displaying a dial number and so on, 30 a keyboard section for entry of a telephone number and so on, 31 a buzzer for producing a sound as a call signal, 32 an electric source switch, and 33 a battery pack. The memory 34 is constituted by an ROM (PROM) and an RAM.
In the following, the operation of the CMTS and
MCS will be described. The radio base stations Sa, 5b to 5n for the CMTS cover a service area within a radius of 3 km. The service area is divided into 120!k sector zones by directional antennas thereof. Because the MCS is adapted for radio communication between floors in the inside of a building [B], a channel (CH) allowed to be used for the MCS is selected from a CMTS frequency band.
The CMTS/MCS double-use portable radio telephone equipment 10 serves as a mobile telephone equipment 7 in Fig. 1 in the case of use of the CMTS and also as an
MCS telephone equipment. The transmission electric power of the CMTS/MCS double-use portable radio telephone equipment 10 is set to be not larger than about 100 mW.
That is, in the case where the CMTS/MCS double-use portable radio telephone equipment 10 is used in the inside of the building [B], not only consideration of avoiding interference with the CMTS is provided by the setting of the transmission electric power but consideration of avoiding influence of the CMTS is provided by setting the 120!k sector zone of the directional antenna out of the service area in the site of the CMTS.
In the following, the operation of the CMTS/MCS double-use portable radio telephone equipment 10 shown in
Fig. 2 will be described below.
Fig. 3 shows a flow of the operation. In a step 101, the electric source switch 32 is turned on.
When, for example, the radio receiver section 23 of the
CMTS/MCS double-use portable radio telephone equipment 10 is started, the fact that which one of the CMTS and MCS had been operating just before the last turning-off of the electric source switch 32 has been stored in the memory 34 in the control section 26. In a step 102, access to the storage in the memory 34 is made under the control of the control section 26 so as to judge whether the storage in the memory 34 indicates the CMTS or not, and if the result of the judgement in the step 102 is "Yes", a judgment is made in a step 103 as to whether a
C-channel for the CMTS is stored in the memory 34 or not.
When the result of judgment in the step 103 is "Yes", the channel stored in the memory 34 is received in a step 104. In a step 105, a judgment is made as to whether reception electric power (reception electric field intensity) Pr from the radio receiver section 23 is sufficiently large or not. When the reception electric power
Pr is sufficiently large, the situation of the routine goes to a step 113 in which the radio receiver section 23 is operated to be in a standby reception state under the control of the control section 26, and the series of procedure to this point is terminated.
In the case where the judgment in the step 103 proves that there is no C-channel stored in the memory 34 or in the case where the result of the judgment in the step 103 is "Yes" but the reception electric power Pr of the channel stored in the memory 34 is not sufficiently large, all the C-channels in each zone for the CMTS are searched under the control of the control section 26 in a step 106 so that the reception electric power Pr of each
C-channel is stored together with the channel number thereof. In a step 107, a judgment is made as to whether there is any C-channel being in good condition or not.
When the result of the judgment in the step 107 is "Yes", a judgment is made in a step 110 as to whether the channel number of the thus obtained channel is identical to the channel number stored in the memory. When the result of the judgment is "Yes", the situation of the routine goes to the step 113 even though the reception electric power Pr is insufficient. In the step 113, the radio receiver section 23 is operated to be in a standby reception state, and the series of procedure to this point is terminated.
When the result of the judgment in the step 107 proves that there is no channel in good condition, a judgment is made in a step 109 as to whether access to
MCS has been performed or not. When the result of the judgment in the step 109 is "No", the situation of the routine goes to access to the MCS. When the result of the judgment in the step 109 is "Yes", on the contrary, an alarm for access failure is generated from the buzzer 31 under the control of the control section 26 in a step 114. Here, the user switches turn off the electric source, so that the series of procedure to this point is terminated.
Circuit connection may be cut off automatically so that a retrial can be made in predetermined timing.
When the result of the judgment in the step 107 is "Yes", a judgment is made in a step 110 again as to whether the channel number of the obtained channel is identical with the channel number stored in the memory 34. When the result of the judgment in the step 110 is "No", that is, when the channel number is not identical with the channel number stored in the memory 34, a new C-channel number is stored in the memory under the control of the control section 26 in a step 111. Then, in a step 112, position registration to report the position of the equipment by signal transmission is performed. Then, in a step 113, the radio receiver section 23 is operated to be in a standby reception state and the series of procedure to this point is terminated.When the result of the judgment in the step 107 is "No", that is, when there is no channel in good condition, the C-channel allocated to the MCS is received in a step 221. In a step 222, all slots are continuously received. In a step 223, a judgment is made as to whether there is any slot having sufficiently large reception electric power Pr. When the judgment proves that there is no slot having sufficiently large reception power Pr, the situation of the routine goes to a step 224 in which a judgment is made as to whether the CMTS has been checked or not. When the result of the judgment is "Yes", that is, when the CMTS has been checked n times, an alarm for access failure is generated from the buzzer 31 under the control of the control unit 26 in a step 114.When the result of the judgment in the step 223 is "Yes", the system ID (identification number) of the CMTS or MCS is checked in a step 225 and then a judgment is made in a step 226 as to whether the checked system ID is the ID of its own system or not. When the result of the judgment is "No", the channel number is changed to the next one in a step 227 to detect the system ID of a slot having next-ranking reception electric power Pr. In a step 228, a judgment is made as to whether all the slots have been already monitored or not. When the result of the judgment in the step 228 is "Yes", the situation of the routine goes to a step 224 in which access to the CMTS is performed.When the result of the judgment in the step 226 is "Yes", the situation of the routine goes to a step 229 in which a judgment is made as to whether the system ID is identical with the slot ID stored in the memory 34. When the result of the judgment is "No", a new slot is stored in the memory 34 in a step 230 and then the position of the equipment is reported in a step 231. After position registration, in a step 232, the radio receiver section is operated to be in a standby reception state for the
MCS. Thus, the series of procedure to this point is terminated.
As described above, which one of the CMTS and
MCS is to be accessed is judged on the basis of the reception level and the system ID of the control channel number. When the result of the judgment is not identical with the storage in the memory, the storage in the memory is rewritten so that changeover between the CMTS and MCS is performed automatically. This changeover is reported to the user.
As is obvious from above description, in the
CMTS/MCS double-use portable radio telephone equipment according to the invention, standby-state reception is performed on the judgment as to which one of the CMTS and
MCS is to be accessed, by automatically detecting the positional condition of the equipment in use. When the equipment is moved to a different area in the CMTS or
MCS, either one of the CMTS and MCS is automatically accessed after position registration. Accordingly, there arises an effect in that both the frequency and equipment can be used in common to the CMTS and MCS to improve the efficiency in use both for the frequency and for the equipment.
Claims (5)
1. A CMTS/MCS double-use portable radio telephone equipment provided with a common antenna, transmission and reception means, a power supply section and a control section, comprising:
CMTS response transmission means for answering a call from a CMTS base station through monitoring control channels of CMTS; MCS response transmission means for answering a call from an MCS base station through monitoring control channels of MCS; and
selection means for automatically selecting either one of the CMTS response transmission means and the MCS response transmission means on the basis of information concerning the receiver signal strength and identification number of the control channels.
2. A CMTS/MCS double-use portable radio telephone equipment according to claim 1, wherein said control section includes a memory for storing channel information and identification number information.
3. A CMTS/MCS double-use portable radio telephone equipment according to claim 2, wherein said memory is arranged so that when the channel information is updated, not only the updated channel information is stored therein but position registration is updated.
4. A CMTS/MCS double-use portable radio telephone equipment according to claim 2, wherein a result of said selection just before turning-off the power supply section is stored as said channel information.
5. A CMTS/MCS double-use portable radio telephone equipment substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3263482A JP2836651B2 (en) | 1991-10-11 | 1991-10-11 | Wide area / closed area shared mobile radiotelephone |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9221072D0 GB9221072D0 (en) | 1992-11-18 |
GB2260468A true GB2260468A (en) | 1993-04-14 |
Family
ID=17390126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9221072A Withdrawn GB2260468A (en) | 1991-10-11 | 1992-10-07 | Portable radio telephone |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2836651B2 (en) |
GB (1) | GB2260468A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002927A1 (en) * | 1993-07-16 | 1995-01-26 | Ericsson Inc. | Method and apparatus for controlling transceiver operations in a radio communications system |
EP0700167A1 (en) * | 1993-08-04 | 1996-03-06 | AT&T Corp. | Universal wireless radiotelephone system |
EP0987860A2 (en) * | 1998-09-16 | 2000-03-22 | Mitsubishi Materials Corporation | Radio server system |
EP0993147A2 (en) * | 1998-09-30 | 2000-04-12 | Mitsubishi Materials Corporation | Radio server system |
EP1117234A1 (en) * | 2000-01-13 | 2001-07-18 | Sagem Sa | Network of communication modules, modules for elementary, for portable and for fixed communcation |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3048137B2 (en) | 1998-04-13 | 2000-06-05 | 日本電気株式会社 | Dual band mobile phone and mobile phone system switching method |
JP4567714B2 (en) | 2007-08-17 | 2010-10-20 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, user apparatus and method |
JP2010273381A (en) * | 2010-08-05 | 2010-12-02 | Ntt Docomo Inc | User device in mobile communication system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234649A (en) * | 1989-04-27 | 1991-02-06 | Stc Plc | Personal communications systems |
EP0418096A2 (en) * | 1989-09-14 | 1991-03-20 | Pcn One Limited | Cellular radio communication system for use with low-power remote stations |
GB2242806A (en) * | 1990-04-06 | 1991-10-09 | Stc Plc | Handover techniques for cellular radio |
GB2252699A (en) * | 1990-11-29 | 1992-08-12 | Matsushita Electric Ind Co Ltd | Mobile communication system |
GB2253968A (en) * | 1991-03-22 | 1992-09-23 | Racal Vodafone Ltd | "cellular telephone system" |
GB2255474A (en) * | 1991-03-22 | 1992-11-04 | * Racal-Vodafone Limited | Cellular telecommunications systems |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0759107B2 (en) * | 1986-07-31 | 1995-06-21 | 株式会社日立製作所 | Closed mobile wireless telephone system |
JPH01220922A (en) * | 1988-02-29 | 1989-09-04 | Canon Inc | Mobile telephone terminal equipment |
-
1991
- 1991-10-11 JP JP3263482A patent/JP2836651B2/en not_active Expired - Lifetime
-
1992
- 1992-10-07 GB GB9221072A patent/GB2260468A/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234649A (en) * | 1989-04-27 | 1991-02-06 | Stc Plc | Personal communications systems |
EP0418096A2 (en) * | 1989-09-14 | 1991-03-20 | Pcn One Limited | Cellular radio communication system for use with low-power remote stations |
GB2242806A (en) * | 1990-04-06 | 1991-10-09 | Stc Plc | Handover techniques for cellular radio |
GB2252699A (en) * | 1990-11-29 | 1992-08-12 | Matsushita Electric Ind Co Ltd | Mobile communication system |
GB2253968A (en) * | 1991-03-22 | 1992-09-23 | Racal Vodafone Ltd | "cellular telephone system" |
GB2255474A (en) * | 1991-03-22 | 1992-11-04 | * Racal-Vodafone Limited | Cellular telecommunications systems |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002927A1 (en) * | 1993-07-16 | 1995-01-26 | Ericsson Inc. | Method and apparatus for controlling transceiver operations in a radio communications system |
US5778322A (en) * | 1993-07-16 | 1998-07-07 | Ericsson Inc. | Method and apparatus for controlling transceiver operations in a radio communications system to reduce same channel frequency interference |
EP0700167A1 (en) * | 1993-08-04 | 1996-03-06 | AT&T Corp. | Universal wireless radiotelephone system |
EP0987860A2 (en) * | 1998-09-16 | 2000-03-22 | Mitsubishi Materials Corporation | Radio server system |
EP0987860A3 (en) * | 1998-09-16 | 2004-01-14 | Mitsubishi Materials Corporation | Radio server system |
EP0993147A2 (en) * | 1998-09-30 | 2000-04-12 | Mitsubishi Materials Corporation | Radio server system |
EP0993147A3 (en) * | 1998-09-30 | 2004-01-14 | Mitsubishi Materials Corporation | Radio server system |
EP1117234A1 (en) * | 2000-01-13 | 2001-07-18 | Sagem Sa | Network of communication modules, modules for elementary, for portable and for fixed communcation |
FR2803971A1 (en) * | 2000-01-13 | 2001-07-20 | Sagem | NETWORK OF COMMUNICATION MODULES AND BASIC, PORTABLE AND FIXED COMMUNICATION MODULES OF THIS NETWORK |
Also Published As
Publication number | Publication date |
---|---|
GB9221072D0 (en) | 1992-11-18 |
JP2836651B2 (en) | 1998-12-14 |
JPH05102923A (en) | 1993-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |