JP4154008B2 - Mobile communication system and mobile station and base station of the system - Google Patents

Mobile communication system and mobile station and base station of the system Download PDF

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Publication number
JP4154008B2
JP4154008B2 JP15528697A JP15528697A JP4154008B2 JP 4154008 B2 JP4154008 B2 JP 4154008B2 JP 15528697 A JP15528697 A JP 15528697A JP 15528697 A JP15528697 A JP 15528697A JP 4154008 B2 JP4154008 B2 JP 4154008B2
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Japan
Prior art keywords
base station
means
communication channel
mobile
broadcast information
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JP15528697A
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Japanese (ja)
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JPH114471A (en
Inventor
一 長谷川
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富士通株式会社
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Priority to JP15528697A priority Critical patent/JP4154008B2/en
Priority claimed from US08/880,665 external-priority patent/US6493561B1/en
Publication of JPH114471A publication Critical patent/JPH114471A/en
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile communication system having a plurality of base stations constituting overlapping zones and a mobile station capable of receiving broadcast information from the base station, wherein the mobile station communicates with the communication channel based on the broadcast information from the base station. The present invention relates to a mobile communication system that performs control to select a base station that requests allocation of a mobile station.
[0002]
[Prior art]
Hereinafter, a call operation flow in the conventional mobile communication system will be described with reference to FIG.
In the case of mobile communication having a base station, there are a method of covering a service area with one base station and a method of covering with a plurality of base stations. The former is called a large zone configuration because a single base station covers a certain wide service area, and conversely, the latter is called a small zone configuration.
[0003]
In a large zone configuration covering a certain wide service area, if there is a place where traffic locally increases, there is a problem that a communication channel in this service area is insufficient. Therefore, in order to absorb the traffic, base stations that constitute a zone smaller than the large zone configuration may be arranged in the service area.
[0004]
In the above situation, in the conventional mobile communication system, when the user of the mobile station turns on the power (S701), the mobile station sequentially measures the reception levels of all peripheral perch channels (S702), and the reception level is predetermined. (S703, YES), the perch channels are sorted in descending order of reception level and stored in the memory in the mobile station (S704), and it is confirmed whether the reception levels of all perch channels have been measured (S705). ). Also, when the reception level is lower than the predetermined level value (S703, NO), the mobile station confirms whether or not the reception levels of all peripheral perch channels have been measured (S705).
[0005]
When the perch channel and the reception level are not stored in the memory (S706, NO), the mobile station displays out-of-service on the display (S707). On the other hand, if the perch channel and the reception level are stored in the memory (S706, YES), the mobile station measures the reception level from the perch channel with the highest reception level in the memory, and the reception level is When it is higher than the standby permission level in the broadcast information from the station, the base station waits. (S708).
[0006]
The waiting mobile station sends a call request to the currently waiting base station when making a call (S709). At this time, the base station that is waiting for the perch channel number and the reception level of the peripheral base station other than the base station making the call request is notified.
The base station that has received the signal from the mobile station has a reception level from the mobile station that is equal to or higher than a predetermined level value that permits the allocation of the communication channel (S710, YES), and further, the communication channel is free ( (S711, YES), a communication channel is allocated (S712). However, in the standby base station, when the reception level from the mobile station is not equal to or higher than a predetermined level value for permitting communication channel assignment (NO in S710), or when there is no free communication channel in the base station ( (S711, NO), the communication channel of the base station that is determined to be allocated to the mobile station from the reception level of the neighboring base station notified from the mobile station is allocated (S713).
[0007]
After receiving the channel assignment signal from the base station, the mobile station can make a call by connecting the communication channel to the corresponding base station (S714).
In other words, a mobile station at a point where there is overlap from a plurality of base stations waits at the base station with the highest reception level of the perch channel corresponding to the base station to be measured, and with respect to the base station waiting for incoming / outgoing calls Communication channel assignment is requested, and communication channel assignment is not requested to other base stations.
[0008]
[Problems to be solved by the invention]
However, in a mobile communication system, it is not always good for a mobile station to request allocation of a communication channel to a base station having a high perch channel reception level.
For example, as shown in FIG. 13, in the large zone configuration of the base station A that covers a somewhat wide service area, if there is a place where traffic locally increases (for example, the area covered by the base station B is shown) ) There may be a shortage of communication channels in the service area. Therefore, in order to absorb the traffic, when the base station B of the zone whose transmission output is smaller than that of the large zone configuration is arranged in the service area, the mobile station in the zone of the base station B is assumed to have the original purpose, The base station B is requested for a call channel.
[0009]
However, in the conventional mobile communication system, the mobile station does not request a call channel to the base station B arranged to cover the increase in local traffic, and has a higher reception level than the base station B. Since a call channel request is made to the station A, there is a problem that an incoming / outgoing call does not occur in the base station B.
In a mobile communication system having a plurality of base stations constituting overlapping zones, the present invention assigns a priority to each base station, and the mobile station requests a call channel from a base station with a high priority. The purpose is to enable telephone calls.
[0010]
[Means for Solving the Problems]
Accordingly, in order to solve the above-described problem, the present invention provides a mobile communication system having a plurality of base stations constituting overlapping zones, as claimed in claim 1, wherein the base stations are connected to the mobile stations in the zones. In addition, the mobile station has notification means (corresponding to the data control section 7 and the transmission / reception section 6 in the embodiment described later) for notifying the notification information including the selection priority order of the base station. A control unit (corresponding to a communication channel control unit 8 in an embodiment to be described later) that selects a base station that requests allocation of a communication channel based on the selection priority order of the included base stations is adopted.
[0011]
In the mobile communication system configured as described above operated in the example of FIG. 13, for example, in a large zone configuration of the base station A that covers a somewhat wide service area, there is a place where traffic is locally increased. In some cases, communication channels in the service area may be insufficient. Therefore, in order to absorb the traffic, when the base station B of the zone whose transmission output is smaller than that of the large zone configuration is arranged in the service area, for example, the base station A on which the mobile station is waiting is included in the broadcast information The base station selection priority is transmitted to the mobile station in the order of base station B and base station A, for example. Therefore, the mobile station requests the base station B having a higher selection priority to allocate a communication channel based on the selection priority of the base station included in the broadcast information from the base station A.
[0012]
Therefore, in the mobile communication system of the present invention, the mobile station requests the call channel to the base station B having a high selection priority arranged to cover the increase in local traffic, and the reception level is high. Since no call channel request is made to the base station A, an incoming / outgoing call to the base station B becomes possible.
Further, the mobile communication system of the present invention is the mobile communication system according to claim 1, wherein the mobile station further includes broadcast information including a selection priority order of base stations transmitted from the base station. Broadcast information receiving means (corresponding to broadcast information receiving section 9 in the embodiment described later) and transmission means for requesting communication channel assignment to the base station selected by the control means (in the embodiment described later) Equivalent to the transmission unit 10).
[0013]
In the mobile communication system configured as described above operated in FIG. 13, the mobile station receives broadcast information including the selection priority order of the required base stations, for example, broadcast information from the base station A and the base station B. For example, the transmission means transmits a request for a communication channel to the base station B having a high selection priority, which is received by the means and determined by the control means, so that an interface with the base station becomes possible.
[0014]
Further, the mobile communication system according to the present invention is the mobile communication system according to claim 1 or 2 as described in claim 3, and the mobile station further stores storage means for storing broadcast information (notification of an embodiment described later). Information corresponding to the information storage unit 11) and the selection priority of the base station and the peripheral perch channel information corresponding to each base station included in the broadcast information stored in the storage means. A measurement unit (corresponding to a reception level measurement unit 12 in an embodiment described later) that measures the reception state of the perch channel in order from the highest base station is adopted.
[0015]
In the mobile communication system configured as described above operated in FIG. 13, the storage unit predetermines the broadcast information including the selection priority from the base station A and the base station B received by the broadcast information receiving unit. Store in the area. The measuring means also includes a perch of the base station B having the highest selection priority based on the selection priorities of the base stations A and B stored in the storage means and peripheral perch channel information corresponding to each base station. The reception level is measured in order from the channel and notified to the control means.
[0016]
Therefore, the mobile communication system of the present invention organizes and stores the selection priority order information of the required base stations in the broadcast information receiving means, and sets the reception level as information necessary when the measurement means selects a communication channel. Since the control means is notified, it becomes possible to efficiently select the base station B that transmits the communication channel based on the judgment of the control means.
Further, the mobile communication system of the present invention is the mobile communication system according to claim 3, wherein the control means is configured such that the reception state of the perch channel measured by the measurement means is that of the communication channel. A configuration is provided that includes means for determining whether or not a predetermined level value permitting the allocation request is satisfied.
[0017]
In the mobile communication system configured as described above that is operated in FIG. 13, the control means of the mobile station is such that the reception level of the perch channel of the base station A or the base station B is, for example, the threshold shown in FIG. It is possible to determine whether the value is greater than or equal to the value.
The mobile communication system according to the present invention is the mobile communication system according to any one of claims 1 to 4, wherein the notification means further selects a peripheral perch channel included in the notification information. It is set as the structure which has a means to alert | report in order from a high priority.
[0018]
In the mobile communication system configured as described above operated in FIG. 13, for example, the notifying unit of the base station A is a base station that is a base station A in the broadcast information and neighboring base stations as one configuration of the broadcast information. It is possible to broadcast the perch channels of B side by side in descending order of selection priority.
Moreover, the mobile communication system of the present invention is the mobile communication system according to any one of claims 1 to 5 as described in claim 6, wherein the notification means further includes a peripheral perch channel included in the notification information; A configuration is provided that includes means for informing selection priority information corresponding to the perch channel in a line.
[0019]
In the mobile communication system configured as described above operated in FIG. 13, for example, the notifying unit of the base station A is a base station that is a base station A in the broadcast information and neighboring base stations as one configuration of the broadcast information. The perch channel of B and the selection priority information corresponding to the perch channel can be reported side by side.
Further, according to the mobile communication system of the present invention, as described in claim 7, in the mobile communication system according to any one of claims 1 to 6, the transmission unit is configured to transmit to the base station selected by the control unit at the time of transmission. Thus, the communication channel allocation request is transmitted.
[0020]
In the mobile communication system configured as described above operated in FIG. 13, as a method for requesting a communication channel, a mobile station selects a base station B having a high selection priority for which a control means requests a communication channel at the time of transmission. Once selected, the transmission means can request the communication channel from the base station B.
The mobile communication system according to the present invention is the mobile communication system according to any one of claims 1 to 7, wherein the transmission means is a base station selected by the control means when an incoming call is received. On the other hand, the communication channel allocation request is transmitted.
[0021]
In the mobile communication system configured as described above operated in FIG. 13, as a method for requesting a communication channel, a mobile station selects a base station B having a high selection priority for which a control means requests a communication channel when an incoming call is received. Once selected, the transmission means can request the communication channel from the base station B.
The mobile communication system according to the present invention is the mobile communication system according to any one of claims 1 to 8, wherein the transmission means is controlled at the time of channel switching by a handover during a call. The communication device is configured to have a means for transmitting a communication channel assignment request to the base station selected by the means.
[0022]
In the mobile communication system configured as described above operated in FIG. 13, the mobile station requests the communication channel as a method for requesting the communication channel when the control means requests the communication channel at the time of channel switching by handover during a call. The base station B having a higher rank is selected, and the transmission means can request the communication channel from the base station B.
[0023]
Further, the mobile station according to the present invention is a control means for selecting a base station that requests allocation of a communication channel based on a selection priority of base stations included in broadcast information from the base station. It is set as the structure which has.
In FIG. 13, the mobile station of the present invention is based on the selection priority of the base station included in the broadcast information from the base station A, and has the highest selection priority arranged to cover the increase in local traffic. Since a call channel request is made to the high base station B and a call channel request is not made to the base station A having a high reception level, an incoming / outgoing call to the base station B becomes possible.
[0024]
Further, the mobile station of the present invention is the mobile station according to claim 10, as in claim 11, further receiving broadcast information including the selection priority order of the base station transmitted from the base station. And a transmission means for requesting communication channel assignment to the base station selected by the control means.
In FIG. 13, the broadcast information receiving means receives broadcast information including the base station selection priority required by the control means from, for example, the base station A and the base station B, and the transmission means is selected by the control means. For example, a request for a communication channel is transmitted to the base station B having a high selection priority. Therefore, the mobile station can interface with the base station.
[0025]
Further, the mobile station of the present invention is the mobile station according to claim 10 or 11, further comprising storage means for storing broadcast information and broadcast information stored in the storage means. A measurement means for measuring the reception state of the perch channel in order from the base station with the highest selection priority based on the selection priority of the base station and the peripheral perch channel information corresponding to each base station, To do.
[0026]
In the mobile station of FIG. 13, the storage means stores the broadcast information including the selection priorities from the base station A and the base station B received by the broadcast information receiving means in a predetermined area. The measuring means also includes a perch of the base station B having the highest selection priority based on the selection priorities of the base stations A and B stored in the storage means and peripheral perch channel information corresponding to each base station. The reception level is measured in order from the channel and notified to the control means.
[0027]
Therefore, the mobile station of the present invention organizes and stores the selection priority order information of the necessary base stations in the broadcast information receiving means, and controls the reception level as information necessary when the measuring means selects a communication channel. In order to notify the means, the mobile station can select the base station B that efficiently transmits the communication channel from these pieces of information.
Further, according to the mobile station of the present invention, the mobile station of the present invention is the mobile station of the twelfth aspect of the present invention, and further, the control means is configured such that the reception state of the perch channel measured by the measurement means It is configured to include means for determining whether or not a predetermined level value permitting the request is satisfied.
[0028]
In the mobile station of FIG. 13, the control means can determine whether the reception level of the perch channel of the base station A or the base station B is equal to or higher than, for example, the threshold shown in FIG. .
Further, as described in claim 14, the mobile station of the present invention is the mobile station according to any one of claims 10 to 13, wherein the transmission unit is configured to The communication channel allocation request is transmitted.
[0029]
As one method for requesting a communication channel, the mobile station in FIG. 13 selects a base station B having a high selection priority for which the control means requests the communication channel at the time of transmission, and the transmission means assigns the communication channel to the base station B. Can be requested.
Further, the mobile station of the present invention is the mobile station according to any one of claims 10 to 14 as described in claim 15, and further, the transmission means is connected to the base station selected by the control means when receiving an incoming call. Thus, the communication channel allocation request is transmitted.
[0030]
As one method for requesting a communication channel, the mobile station in FIG. 13 selects a base station B having a high selection priority for which the control means requests a communication channel when an incoming call is received, and the transmission means assigns a communication channel to the base station B. Can be requested.
Further, the mobile station of the present invention is the mobile station according to any one of claims 10 to 15 as described in claim 16, wherein the transmission means is used as a control means at the time of channel switching by handover during a call. And a means for transmitting a communication channel assignment request to the selected base station.
[0031]
As one method for requesting a communication channel, the mobile station of FIG. 13 selects a base station B having a high selection priority for which the control means requests the communication channel when switching the channel by handover during a call, and the transmission means is the base station. B can request a communication channel.
In addition, the base station of the present invention, as claimed in claim 17, is a base station that constitutes a zone that overlaps with other zones. It is set as the structure which has an alerting | reporting means to alert | report.
[0032]
As shown in FIG. 13, in the large zone configuration of the base station A that covers a somewhat wide service area, when the base station B of a zone having a smaller transmission output than the large zone configuration is arranged in the service area, for example, the mobile station The waiting base station A can transmit the selection priority of base stations included in the broadcast information to the mobile station in the order of base station B and base station A, for example.
[0033]
Further, the base station according to the present invention is the base station according to claim 17, as described in claim 18, and further, the notification means reports the peripheral perch channels included in the broadcast information in the order of higher selection priority. It is set as the structure which has a means.
In the base station A of FIG. 13, for example, the notifying means reports the perch channels of the base station A and the base station B that is a neighboring base station in the order of higher selection priority as a configuration of the notification information. It becomes possible to do.
[0034]
Further, the base station of the present invention is the base station according to claim 16 or 17, as described in claim 19, and further, the notification means corresponds to the peripheral perch channel included in the broadcast information and the perch channel. A configuration is provided that includes means for informing selection priority order information one by one.
In the base station A of FIG. 13, for example, the notification means has a perch channel and a selection priority corresponding to the perch channel of the base station A in the broadcast information and the base station B that is a neighboring base station as one configuration of the broadcast information. It is possible to notify the rank information arranged side by side.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, in a mobile communication system having a plurality of base stations constituting overlapping zones, each base station is prioritized, the mobile station requests a call channel from the base station having a high priority, and the base station makes a call. An embodiment of the present invention that enables this will be described based on the principle configuration diagram of the mobile communication system of FIG.
[0036]
The mobile communication system of the embodiment operates in the situation shown in the configuration example of the mobile communication system in FIG. In FIG. 2, a base station 1 and a base station 2 form a zone A21 and a zone B22 that are adjacent to each other. In the zone 21A, a base station 1 that hierarchically forms a zone C23 and a zone D24. A base station 3 having a small transmission output and a base station 4 having a small transmission output are arranged. Note that the mobile station 5 is waiting in the area formed by the zone A21, the zone B22, the zone C23, and the zone D24.
[0037]
The base station and the mobile station of the mobile communication system according to the embodiment are configured as shown in the hardware configuration diagrams of FIGS. 14 and 15, respectively, and are positioned as the embodiment of the present invention in FIG. 1.
In the base station hardware of FIG. 14, the control unit 102 that manages the broadcast information set by the control center 104 via the interface unit 103 is sent to the transceiver (TRX) in the TRX shelf 106 at the timing of the oscillator 110. The transmitter / receiver that has transmitted and received the broadcast information transmits the broadcast information to the mobile station via the RF distribution / combination device 107, the amplification device 108, and the antenna 109. The base station hardware receives a communication channel request at the time of an incoming / outgoing call from the mobile station via the antenna 109, the amplifier 108, and the RF distribution / combination unit 107 by the transceiver in the TRX shelf 106 and transmits / receives the transmission / reception. Information on the machine is transmitted to the control center 104 under the control of the control unit 102, and further communication is established via the fixed network 105, thereby realizing a function as a base station. A shelf is a box that stores a transceiver.
[0038]
In FIG. 14, the transmission / reception unit 101 corresponds to the transmission / reception unit 6 of the embodiment described later, and the control unit 102 corresponds to the data control unit 7 of the embodiment described later.
The mobile station hardware in FIG. 15 receives the broadcast information from the base station via the antenna 505 or the antenna 506 and the duplexer 507 by the receiver 508 and the receiver 509, respectively, and the demodulator The signal demodulated in 503 is signal-processed by a TDMA (time division multiple access) circuit 504, and the control unit 502 determines the base station selection priority in the broadcast information and the reception level of the perch channel corresponding to the base station. The base station that requests allocation of the communication channel is selected. In addition, the mobile station hardware controls the communication channel allocation request at the time of incoming / outgoing call by the control unit 502 and transmits it to the TDMA circuit 504, which is processed by the TDMA circuit 504 and then modulated by the modulator 510. And it transmits to a base station via the transmission / reception duplexer 507 and the antenna 506, and the function as a mobile station is implement | achieved.
[0039]
The positioning of the embodiment of the present invention of FIG. 1 in FIG. 15 corresponds to the broadcast information receiving section 9 and the transmitting section 10 of the embodiment described later, and the control section 502 controls the communication channel of the embodiment described later. Corresponds to the unit 8, the notification information storage unit 11, and the reception level measurement unit 12.
1, the base station 1 is composed of a data control unit 7 and a transmission / reception unit 6, and as broadcast means, broadcast information is transmitted to the mobile station, and a channel for a communication channel request from the mobile station is transmitted. Has a function of executing control for assigning.
[0040]
The data control unit 7 manages and controls the selection priority of the base station 1, which is information for the mobile station to select a base station that requests a communication channel, or the selection priority of the base station 1 and its neighboring base stations. In addition, it has a function of executing communication channel assignment control and setting a call in response to a communication channel request from a mobile station at the time of outgoing call, at the time of incoming call, or when switching the communication channel during a call. The transmission / reception unit 6 has a function of interfacing all signals controlled by the data control unit 7. Note that the configurations and functions of the base station 2, the base station 3, and the base station 4 are the same as the configurations and functions described in the base station 1, and thus description thereof is omitted.
[0041]
1, the mobile station 5 includes a communication channel control unit 8, a broadcast information reception unit 9, a transmission unit 10, a broadcast information storage unit 11, and a reception level measurement unit 12.
The communication channel control unit 8 selects the priority order of base stations included in the broadcast information from each base station (base stations 1, 2, 3, 4) and each base station (base stations 1, 2, 3, 4). And a base station that requests allocation of a communication channel based on the reception level of the perch channel corresponding to the above. The broadcast information receiving unit 9 has a function of receiving broadcast information from the base station. The transmission unit 10 has a function of transmitting a communication channel request to the base station determined by the communication channel control unit 8. The broadcast information storage unit 11 has a function of storing broadcast information received by the broadcast information receiving unit 9. The reception level measurement unit 12 reads the broadcast information stored in the broadcast information storage unit 11 when requesting a communication channel from the base station, and determines the reception level of the perch channel in descending order of selection priority of the base station. It has a function of measuring and transmitting the result to the communication channel control unit 8.
[0042]
In the mobile communication system configured as shown in FIG. 1 and FIG. 2, the principle that the mobile station requests a communication channel from the base station will be briefly described based on the principle explanatory diagram of FIG. 3A shows the flow of notification information, and FIG. 3B shows the principle flow.
For example, processing when the mobile station 5 waiting in the base station 1 places a call within the service area of the base station 4 will be described. The mobile station 5 measures the reception level of the base station 1 and the surrounding base stations (base stations 2, 3, 4) with the reception level measuring unit 12, and receives the base station from which the broadcast information is obtained, for example, the most The base station 1 is determined to have a high level. The reception levels measured by the reception level measuring unit 12 are base station 1, base station 3, base station 4, and base station 2 in descending order of level value.
[0043]
When the base station 1 transmits the broadcast information managed by the data control unit 7 via the transmission / reception unit 6, the broadcast information reception unit 7 of the mobile station 5 stores the received broadcast information in the broadcast information storage unit 11. . The broadcast information format is transmitted from the base station, for example, in the format of FIGS. FIG. 4 is an example in which the selection priority of the base station that transmitted the broadcast information is included in the broadcast information. FIG. 5 is an example of broadcast information in which the perch channel numbers of the base station that transmitted the broadcast information and the neighboring base stations are arranged in order of selection priority (or low order). FIG. 6 is an example of broadcast information in which the perch channel numbers of the base station and the neighboring base station that transmitted the broadcast information and the selection priority order of the base station corresponding to the perch channel are arranged one by one.
[0044]
At the time of calling, the reception level measuring unit 12 measures the reception level of the perch channel corresponding to each base station in descending order of selection priority based on the selection priority of the broadcast information received from the base station first (S1). ) To the control unit 8. The selection priority of the broadcast information set here is the order of base station 4, base station 3, base station 1, and base station 2.
[0045]
When the level value of the perch channel corresponding to the base station 4 is higher than a predetermined threshold value, the control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and transmits the transmission unit 10. A communication channel is requested to the base station 4 via (step S2).
Next, the processing of the mobile communication system when the mobile station 5 waiting in the base station 1 places a call within the service area of the base station 4 of the mobile communication system configured as shown in FIG. The operation will be described in detail based on the operation flow at the time of calling and the operation sequence at the time of calling in FIG.
[0046]
The mobile station 5 measures the reception level of each base station (base stations 1, 2, 3, 4) that constitutes the Thorn with the reception level measuring unit 12 (FIG. 8, S201, S202, S203, S204). As a result of the measurement, the reception level of each base station is “base station 2 <base station 4 <base station 3 <base station 1”, and the communication channel control unit 8 determines that the base station from which the broadcast information is obtained has the highest reception level. It is determined that the base station 1 is high.
[0047]
When the mobile station 5 receives the broadcast information from the base station 1 (S205). The broadcast information receiving unit 9 that has received the broadcast information stores the information in the broadcast information storage unit 11. The broadcast information format is transmitted from the base station, for example, in the format of FIGS. FIG. 4 is an example in which the selection priority of the base station that transmitted the broadcast information is included in the broadcast information. When the broadcast information as shown in FIG. 4 is obtained, the mobile station needs to obtain the broadcast information from the neighboring base stations other than the base station that transmitted the broadcast information in order to know the selection priority order of the neighboring base stations. is there. FIG. 5 is an example of broadcast information in which the perch channel numbers of the base station that transmitted the broadcast information and the neighboring base stations are arranged in order of selection priority (or low order). FIG. 6 is an example of broadcast information in which the perch channel numbers of the base station and the neighboring base station that transmitted the broadcast information and the selection priority order of the base station corresponding to the perch channel are arranged one by one. In this embodiment, it is assumed that the notification information of FIG. 5 is obtained.
[0048]
Here, the communication channel control unit 8 reads the broadcast information from the broadcast information storage unit 11, and selects a predetermined reception level that permits selection priority of each base station (base station 1, 2, 3, 4) and a communication channel request. Recognize the threshold. The selection priority is assumed to be set as “base station 2 <base station 1 <base station 3 <base station 4”. The reception level measurement unit 12 reads the broadcast information from the broadcast information storage unit 11 and extracts the selection priority of each base station corresponding to the perch channel number included in the broadcast information as shown in FIG. The reception level of the perch channel corresponding to the base station 4 with the highest selection priority is measured (S206).
[0049]
The reception level measurement unit 12 transmits the level value of the measurement result to the communication channel control unit 8, and the communication channel control unit 8 confirms whether the level is equal to or higher than a predetermined threshold value that permits the communication channel request. To do. As a result of the confirmation, when the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold value, the mobile station 5 acquires broadcast information from the base station 4 (S207). As a result of the confirmation, if the communication channel control unit 8 determines that the threshold is less than the threshold value, the reception level measurement unit 12 receives the perch channel reception level corresponding to the base station 3 having the second highest selection priority after the base station 4. Is measured (S206). The reception level measurement unit 12 performs the perch channel reception level measurement processing of each base station based on the selection priority until a base station having a predetermined threshold exists or until all perch channels are measured. The order of selection priority is lowered in order, and step 206 is repeated.
[0050]
After the process of step 207 is executed, when the user of the mobile station 5 executes a call origination operation to a third party (S208) (FIG. 7, S101), the communication channel control unit 8 uses the broadcast information from the base station 4 as a notification information. Whether there is a selection priority of each base station (base stations 1, 2, 3, 4) is confirmed (S102).
When there is a selection priority order of each base station (base stations 1, 2, 3, 4) (S102, Y), the reception level measurement unit 12 reads the broadcast information from the broadcast information storage unit 11, and shows it in FIG. The selection priority of each base station (base station 1, 2, 3, 4) corresponding to the perch channel number included in such broadcast information is extracted, and the perch corresponding to the base station 4 with the highest selection priority Measure the channel reception level. The selection priority order currently stored in the broadcast information storage unit 11 is “base station 2 <base station 1 <base station 3 <base station 4”.
[0051]
The reception level measurement unit 12 transmits the perch channel level value corresponding to the measured base station 4 to the communication channel control unit 8, and the communication channel control unit 8 uses a predetermined threshold for permitting the communication channel request. It is confirmed whether or not the value is greater than or equal to the value (S103). As a result of the confirmation, when the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold value (S103, Y), the communication channel control unit 8 controls the broadcast information from the base station 4 stored in the control information storage unit 11. Information is extracted and it is confirmed whether or not the call can be made in the zone D24 (S108).
[0052]
If the communication channel control unit 8 determines that the result of the confirmation in step 103 is less than the threshold value (S103, N), the reception level measurement unit 12 determines that the base station with the second highest selection priority next to the base station 4 is used. It is confirmed whether there is a corresponding perch channel (S104). If there is no perch channel corresponding to the base station with the second highest selection priority after the base station 4 (S104, N), the mobile station 5 is unable to make a call (S105) and enters a standby state (S106). If there is a perch channel corresponding to the base station with the second highest selection priority after the base station 4 (S104, Y), the reception level measurement unit 12 receives the perch channel reception level of each base station based on the selection priority. The measurement processing is performed by decreasing the selection priority in order until a base station having a predetermined threshold exists (S107, Y) or until all perch channels are measured (S104, N). 107 is repeated (S107, N). As a result of the confirmation, if the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold (S107, Y), the communication channel control unit 8 is stored in the control information storage unit 11. The restriction information is extracted from the broadcast information from the base station, and it is confirmed whether or not the call can be made in the zone formed by the base station (S108). In step 102, when there is no selection priority order of neighboring base stations (S102, N), the communication channel control unit 8 determines the restriction information from the broadcast information stored in the control information storage unit 11 from the base station. And whether or not a call can be made in the zone constituted by the base station is confirmed (S108).
[0053]
As a result of checking whether or not a call can be made in the zone D24 formed by the base station 4, if the call cannot be made (S108, N), the mobile station 5 enters a standby state (S109). When the call can be made (S108, Y), the communication channel control unit 8 extracts the restriction information from the broadcast information from the base station 4 stored in the control information storage unit 11, and configures the zone formed by the base station 4 D24 confirms whether there is a restriction regarding a priority mobile station to which a communication channel is preferentially assigned (S110).
[0054]
If there is a restriction on the priority mobile station (S110, Y), if the mobile station 5 is a priority mobile station (S111, Y), the communication channel control unit 8 checks whether the mobile station 5 can make a call (S112). . When transmission is possible (S112, Y), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and transmits a communication channel request via the transmission unit 10 (S209). When the transmission is impossible (S112, N), the mobile station 5 stands by (S113).
[0055]
On the other hand, if there is a restriction on the priority mobile station (S110, Y), if the mobile station 5 is not a priority mobile station (S111, N), the communication channel control unit 8 checks whether the mobile station 5 is restricted. (S114). When there is no restriction (S114, N), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and transmits the communication channel request via the transmission unit 10 (S209). When there is a restriction (S114, Y), the mobile station 5 waits (S115).
[0056]
If there is no restriction on the priority mobile station in the confirmation in step 110 (S110, N), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4 and A communication channel request is transmitted (S209).
When the communication channel request is received, the base station 4 allocates a free communication channel to the mobile station 5 and transmits a channel assignment signal (S210). If the communication channel is not available, the base station 4 notifies the mobile station 5 that there is no communication channel, and the mobile station 5 is on standby.
[0057]
The mobile station 5 that has received the channel assignment signal transmits to a third party (S116), establishes the assigned communication channel with the base station 4, and starts a call (S211).
Further, in the service area of the base station 3 of the mobile communication system configured as shown in FIG. 2, the processing of the mobile communication system when the mobile station 5 waiting in the base station 1 arrives is shown in FIG. The operation will be described in detail based on the operation flow of FIG.
[0058]
The mobile station 5 measures the reception level of each base station (base stations 1, 2, 3, 4) constituting the zone by the reception level measuring unit 12 (FIG. 10, S401, S402, S403, S404). As a result of the measurement, the reception level of each base station (base stations 1, 2, 3, 4) is “base station 2 <base station 4 <base station 3 <base station 1”, and communication channel control unit 8 The base station from which information is obtained is determined as the base station 1 with the highest reception level.
[0059]
The mobile station 5 receives the broadcast information from the base station 1 (S405). The broadcast information receiving unit 9 that has received the broadcast information stores the information in the broadcast information storage unit 11. The broadcast information format is transmitted from the base station, for example, in the format of FIGS. FIG. 4 is an example in which the selection priority of the base station that transmitted the broadcast information is included in the broadcast information. When the broadcast information as shown in FIG. 4 is obtained, the mobile station needs to obtain the broadcast information from the neighboring base stations other than the base station that transmitted the broadcast information in order to know the selection priority order of the neighboring base stations. is there. FIG. 5 is an example of broadcast information in which the perch channel numbers of the base station that transmitted the broadcast information and the neighboring base stations are arranged in order of selection priority (or low order). FIG. 6 is an example of broadcast information in which the perch channel numbers of the base station and the neighboring base station that transmitted the broadcast information and the selection priority order of the base station corresponding to the perch channel are arranged one by one. In this embodiment, it is assumed that the notification information of FIG. 5 is obtained.
[0060]
Here, the communication channel control unit 8 reads the broadcast information from the broadcast information storage unit 11, and selects a predetermined reception level that permits selection priority of each base station (base station 1, 2, 3, 4) and a communication channel request. Recognize the threshold. The selection priority is assumed to be set as “base station 2 <base station 4 <base station 1 <base station 3”. Also, the reception level measurement unit 12 reads the broadcast information from the broadcast information storage unit 11, and each base station (base station 1, 2, 3) corresponding to the perch channel number included in the broadcast information as shown in FIG. 4), the reception priority of the perch channel corresponding to the base station 3 having the highest selection priority is measured (S406).
[0061]
The reception level measurement unit 12 transmits the level value of the measurement result to the communication channel control unit 8, and the communication channel control unit 8 confirms whether the level is equal to or higher than a predetermined threshold value that permits the communication channel request. To do. As a result of the confirmation, when the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold value, the mobile station 5 acquires broadcast information from the base station 3 (S407), and the communication channel control unit 8 reports from the base station 3 The selection priority of each base station (base station 1, 2, 3, 4) in the information is obtained. As a result of the confirmation, if the communication channel control unit 8 determines that it is less than the threshold value, the reception level measurement unit 12 receives the perch channel reception level corresponding to the base station 4 having the second highest selection priority after the base station 3. Is measured (S406). The reception level measurement unit 12 performs the perch channel reception level measurement processing of each base station based on the selection priority until a base station having a predetermined threshold exists or until all perch channels are measured. Step 406 is repeated with the selection priority lowered in order.
[0062]
After the process of step 407 is executed, when the user of the mobile station 5 receives an incoming call from a third party (S408, S409, S410, S411) (FIG. 9, S301), each base station (base station 1, 2, 3, 4) (S <b> 302, Y), the reception level measurement unit 12 reads the notification information from the notification information storage unit 11 and is included in the notification information as illustrated in FIG. 5. The selection priority of each base station (base station 1, 2, 3, 4) corresponding to the perch channel number is extracted, and the reception level of the perch channel corresponding to the base station 3 with the highest selection priority is measured. Currently, the selection priority stored in the broadcast information storage unit 11 is “base station 2 <base station 4 <base station 1 <base station 3”.
[0063]
The reception level measurement unit 12 transmits the measured perch channel level value corresponding to the base station 3 to the communication channel control unit 8, and the communication channel control unit 8 uses a predetermined threshold for permitting the communication channel request. It is confirmed whether or not it is equal to or greater than the value (S303). As a result of the confirmation, when the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold (S303, Y), the communication channel control unit 8 regulates from the notification information from the base station 3 stored in the control information storage unit 11. Information is extracted and it is confirmed whether or not an incoming call can be made in the zone C23 (S308).
[0064]
When the communication channel control unit 8 determines that the result of the confirmation in step 303 is less than the threshold value (S303, N), the reception level measurement unit 12 determines that the base station with the second highest selection priority after the base station 3 It is checked whether there is a corresponding perch channel (S304). If there is no perch channel corresponding to the base station with the second highest selection priority after the base station 3 (S304, N), the mobile station 5 becomes unable to receive a call (S305) and enters a standby state (S306). When there is a perch channel corresponding to the base station with the second highest selection priority after the base station 3 (S304, Y), the reception level measurement unit 12 measures the reception level of the perch channel of each base station based on the selection priority. Until the base station having a predetermined threshold value is present (S307, Y) or until all perch channels are measured (S304, N), the selection priority is decreased in order and step 304 and step 307 are performed. Is repeated (S307, N) and, as a result of the confirmation, if the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold (S307, Y), the communication channel control unit 8 stores the base stored in the control information storage unit 11 The restriction information is extracted from the broadcast information from the station, and it is confirmed whether the incoming call is possible in the zone formed by the base station (S308). In step 302, if there is no selection priority order of neighboring base stations (S302, N), the communication channel control unit 8 obtains the restriction information from the broadcast information from the base station stored in the control information storage unit 11. It is extracted and it is confirmed whether the incoming call is possible in the zone constituted by the base station (S308).
[0065]
As a result of confirming whether or not an incoming call is possible in the zone C24 formed by the base station 3, if the incoming call is not possible (S308, N), the reception level measuring unit 12 is the base station with the second highest selection priority after the base station 3. It is confirmed whether there is a perch channel corresponding to (S304). If there is no perch channel corresponding to the base station with the second highest selection priority after the base station 3 (S304, N), the mobile station 5 becomes unable to receive a call (S305) and enters a standby state (S306). If there is a perch channel corresponding to the base station with the second highest selection priority after the base station 3 (S304, Y), the reception level measurement unit 12 receives the perch channel reception level of each base station based on the selection priority. The measurement processing is performed by decreasing the selection priority in order until a base station having a predetermined threshold exists (S307, Y) or until all perch channels are measured (S304, N). 307 is repeated (S307, N), and when the communication channel control unit 8 determines that the threshold is equal to or greater than the threshold value (S307, Y) as a result of the confirmation, the communication channel control unit 8 is stored in the control information storage unit 11. The restriction information is extracted from the broadcast information from the base station, and it is confirmed whether the incoming call is possible in the zone formed by the base station (S308).
[0066]
On the other hand, as a result of checking whether the incoming call is possible in the zone C24 formed by the base station 3, if the incoming call is possible (S308, Y), the communication channel control unit 8 stores the base station stored in the control information storage unit 11 The restriction information is extracted from the broadcast information from No. 3, and it is confirmed whether or not there is a restriction regarding the priority mobile station to which the communication channel is preferentially assigned to the zone C23 formed by the base station 3 (S309).
[0067]
If there is a restriction on the priority mobile station (S309, Y), if the mobile station 5 is a priority mobile station (S310, Y), the communication channel control unit 8 checks whether the mobile station 5 can receive a call (S311). . When the incoming call is possible (S311, Y), the communication channel control unit 8 determines the base station 3 that requests the communication channel as the base station 3, and transmits the communication channel request via the transmission unit 10 (S412). If the incoming call is not possible (S311, N), the mobile station 5 stands by (S312).
[0068]
On the other hand, if there is a restriction on the priority mobile station (S309, Y), if the mobile station 5 is not a priority mobile station (S310, N), the communication channel control unit 8 checks whether the mobile station 5 is restricted. (S313). When there is no restriction (S313, N), the communication channel control unit 8 determines the base station 3 that requests the communication channel as the base station 3, and transmits the communication channel request via the transmission unit 10 (S412). If there is a restriction (S313, Y), the mobile station 5 is on standby (S314).
[0069]
If there is no restriction on the priority mobile station in the confirmation in step 110 (S309, N), the communication channel control unit 8 determines the base station 3 that requests the communication channel as the base station 3 and A communication channel request is transmitted (S412).
When the communication channel request is received, the base station 3 allocates an available communication channel to the mobile station 5 and transmits a channel assignment signal (S413). If there is no available communication channel, the mobile station 5 is on standby.
[0070]
Receiving the channel assignment signal, the base station 5 sends an incoming call response to the base station 3 (S309), establishes the assigned communication channel with the base station 3, and starts a call (S414).
Further, in the service area of the base station 1 of the mobile communication system configured as shown in FIG. 2, the communication system processing when the mobile station 5 that is talking on the base station 1 performs communication channel switching by handover is performed. The operation will be described in detail based on the operation flow when switching the recalling channel in FIG. 11 and the operation sequence when switching the recalling channel in FIG. Note that, for communication channel switching during a call, the same processing is executed when the quality of the reception state deteriorates in addition to handover.
[0071]
When the mobile station 5 establishes a communication channel with the base station 1 and is in a call with a third party (FIG. 12, S601), the reception level of the base station 1 falls below a predetermined threshold value, and the reception state deteriorates. When it becomes necessary to switch communication channels by handover (S602) (FIG. 11, S501), the communication channel control unit 8 adds each base station (base station 1, 2,. It is confirmed whether there is a selection priority of (3, 4) (S502). The selection priority order currently stored in the broadcast information storage unit 11 is “base station 2 <base station 3 <base station 4 <base station 1” as broadcast information obtained when establishing a communication channel with the base station 1. Is remembered.
[0072]
When there is a selection priority order of each base station (base stations 1, 2, 3, 4) (S502, Y), the reception level measurement unit 12 reads out the notification information from the notification information storage unit 11, and is shown in FIG. The selection priority of each base station (base station 1, 2, 3, 4) corresponding to the perch channel number included in such broadcast information is extracted, and the base station with the next highest selection priority after base station 1 The reception level of the perch channel corresponding to 4 is measured (S603).
[0073]
The reception level measurement unit 12 transmits the perch channel level value corresponding to the measured base station 4 to the communication channel control unit 8, and the communication channel control unit 8 uses a predetermined threshold for permitting the communication channel request. It is confirmed whether or not the value is greater than or equal to the value (S503). As a result of the confirmation, when the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold value (S503, Y), the communication channel control unit 8 regulates from the broadcast information from the base station 4 stored in the control information storage unit 11. Information is extracted, and it is confirmed whether or not re-calling is possible in the zone D24 (S508).
[0074]
If the communication channel control unit 8 determines that the result of the confirmation in step 503 is less than the threshold value (S503, N), the reception level measurement unit 12 determines that the base station 4 next to the base station 4 has the highest selection priority. It is checked whether there is a corresponding perch channel (S504). If there is no perch channel corresponding to the base station with the next highest selection priority after the base station 4 (S504, N), the mobile station 5 cannot switch the communication channel (S505), or the call is disconnected, or Return to the original base station (S506). If there is a perch channel corresponding to the base station with the second highest selection priority after the base station 4 (S504, Y), the reception level measurement unit 12 receives the perch channel reception level of each base station based on the selection priority. Steps 504 and step are performed by decreasing the selection priority in order until the base station with a predetermined threshold exists (S507, Y) or until all perch channels are measured (S504, N). If the communication channel control unit 8 determines that the threshold value is equal to or greater than the threshold value as a result of the confirmation (S507, Y), the communication channel control unit 8 reports from the base station stored in the control information storage unit 11 The restriction information is extracted from the information, and it is confirmed whether or not a re-call is possible in the zone formed by the base station (S508). In step 502, when there is no selection priority order of the neighboring base stations (S502, N), the communication channel control unit 8 determines the restriction information from the broadcast information stored in the control information storage unit 11 from the base station. Is extracted, and it is confirmed whether or not re-calling is possible in the zone constituted by the base station (S508).
[0075]
As a result of checking whether or not a re-call is possible in the zone D24 formed by the base station 4, if the re-call is impossible (N in S508), the mobile station 5 cannot switch the communication channel, and the call is disconnected (S509). When the re-call is possible (S508, Y), the communication channel control unit 8 extracts the restriction information from the broadcast information from the base station 4 stored in the control information storage unit 11, and the zone that the base station 4 configures D24 confirms whether there is a restriction regarding a priority mobile station to which a communication channel is preferentially assigned (S510).
[0076]
If there is a restriction on the priority mobile station (S510, Y), if the mobile station 5 is a priority mobile station (S511, Y), the communication channel control unit 8 checks whether the mobile station 5 can retransmit (S512). ). When re-transmission is possible (S512, Y), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and transmits the communication channel request via the transmission unit 10 (S604). If the call cannot be retransmitted (S512, N), the mobile station 5 cannot switch the communication channel and disconnects the call (S513).
[0077]
On the other hand, if there is a restriction on the priority mobile station (S510, Y), if the mobile station 5 is not a priority mobile station (S511, N), the communication channel control unit 8 checks whether the mobile station 5 is restricted. (S514). If there is no restriction (S514, N), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and transmits the communication channel request via the transmission unit 10 (S604). If there is a restriction (S514, Y), the mobile station 5 cannot switch the communication channel, and the call is disconnected (S515).
[0078]
If there is no restriction on the priority mobile station in the confirmation in step 510 (S510, N), the communication channel control unit 8 determines the base station 4 that requests the communication channel as the base station 4, and passes through the transmission unit 10. A communication channel request is transmitted (S604) (S516).
When the communication channel request is received, the base station 4 allocates a free communication channel to the mobile station 5 and transmits a channel assignment signal (S605). When there is no communication channel available, the mobile station 5 disconnects the call.
[0079]
Receiving the channel assignment signal, the base station 5 establishes the assigned communication channel with the base station 4 and continues the call (S606).
In the mobile communication system of the present invention, for example, a base station 1 and a base station 2 as shown in FIG. 2 form a zone A21 and a zone B22 that are adjacent to each other, and a zone C23 and a zone D24 are formed in the zone 21A. Even in a hierarchical zone configuration in which the base station 3 and the base station 4 having a transmission output smaller than that of the base station 1 forming the base station 1 are arranged, a base station that requests a communication channel for broadcast information can be determined. Since the selection priority is added, if the selection priority of the base station 3 and the base station 4 having a reception level lower than that of the base station 1 is set higher, the communication channel of the base station 3 and the base station 4 is Requests can be made and incoming and outgoing calls can be made.
[0080]
【The invention's effect】
As described above, according to the mobile communication system of the present invention, the hierarchical zone in which the base station B having a smaller transmission output than the base station A forming the zone is arranged in the zone formed by the base station A. Even if it is a structure, since the selection priority which can determine the base station which requests | requires a communication channel is added to alerting | reporting information, the selection priority of the base station B whose reception level is lower than the base station A can be set high. For example, the mobile station makes a call channel request to the base station B based on the selection priority of the broadcast information, and can make and receive calls.
[Brief description of the drawings]
FIG. 1 is a principle configuration diagram of an embodiment of the present invention.
FIG. 2 is a diagram illustrating a configuration example of a mobile communication system.
FIG. 3 is a diagram illustrating the principle.
FIG. 4 is an example of broadcast information.
FIG. 5 is an example of broadcast information.
FIG. 6 is an example of broadcast information.
FIG. 7 is an operation flow at the time of calling.
FIG. 8 is an operation sequence at the time of calling.
FIG. 9 is an operation flow at the time of an incoming call.
FIG. 10 is an operation sequence diagram at the time of an incoming call.
FIG. 11 is an operation flow when switching the recalling channel.
FIG. 12 is a sequence diagram of a recalling-type channel switching control.
FIG. 13 is an example of overlapping base stations.
FIG. 14 is a hardware configuration of a base station.
FIG. 15 is a hardware configuration of a mobile station.
FIG. 16 is an operation flow at the time of conventional transmission.
[Explanation of symbols]
1 base station
2 base stations
3 base stations
4 base stations
5 Mobile stations
6 transceiver
7 Data control unit
8 Communication channel controller
9 Broadcast information receiver
10 Transmitter
11 Notification information storage unit
12 Reception level measurement unit
21 Zone A
22 Zone B
23 Zone C
24 Zone D
101 transceiver
102 Control unit
103 Interface part
104 Control center
105 fixed net
106 TRX shelf
107 RF distributor / synthesizer
108 Amplifier
109 Antenna
110 Oscillator
501 Transceiver
502 control unit
503 Demodulator
504 TDMA circuit
505 antenna
506 Antenna
507 Transmitter / receiver duplexer
508 receiver
509 receiver
510 modulator

Claims (16)

  1. In a mobile communication system having a plurality of base stations constituting overlapping zones,
    Base station to the mobile station in the zone, comprising an informing means for informing the broadcast information including a selection priority information defining the selection priorities among the respective base stations,
    The mobile station measures the reception level from the base station in descending order of priority based on the base station selection priority information included in the broadcast information from the base station. A mobile communication system comprising: control means for selecting a base station that requests allocation of a communication channel to a base station whose reception level is higher than a predetermined threshold value .
  2. The mobile communication system according to claim 1, wherein
    Furthermore, the mobile station, broadcast information receiving means for receiving broadcast information including selection priority information for determining selection priority between two or more base stations transmitted from the base station,
    A mobile communication system comprising: transmission means for requesting allocation of a communication channel to a base station selected by the control means.
  3. The mobile communication system according to claim 1 or 2,
    Further, the mobile station stores in the storage means for storing the broadcast information, the selection priority order information of the base station and the peripheral perch channel information corresponding to each base station included in the broadcast information stored in the storage means. And a measuring means for measuring the reception state of the perch channel in order from the base station with the highest selection priority.
  4. The mobile communication system according to claim 3,
    Further, the control means has means for judging whether or not the reception state of the perch channel measured by the measuring means satisfies a predetermined level value permitting the request for communication channel assignment. system.
  5. The mobile communication system according to any one of claims 1 to 4,
    Furthermore, the notifying means has means for informing and arranging peripheral perch channels included in the notification information in descending order of selection priority.
  6. The mobile communication system according to any one of claims 1 to 5,
    Further, the informing means has means for informing and displaying a set of peripheral perch channels included in the informing information and selection priority information corresponding to the perch channels.
  7. The mobile communication system according to any one of claims 1 to 6,
    The mobile communication system, wherein the transmission means includes means for transmitting a communication channel allocation request to the base station selected by the control means at the time of transmission.
  8. The mobile communication system according to any one of claims 1 to 7,
    The transmission means further comprises means for transmitting a communication channel assignment request to the base station selected by the control means at the time of an incoming call.
  9. The mobile communication system according to any one of claims 1 to 8,
    The transmission means further comprises means for transmitting a communication channel assignment request to the base station selected by the control means at the time of channel switching due to a handover during a call.
  10. In a mobile station of a mobile communication system having a plurality of base stations constituting overlapping zones ,
    Broadcast information receiving means for receiving broadcast information including selection priority information for determining selection priority between a plurality of base stations transmitted from a base station;
    Based on the selection priority order information of the base station included in the broadcast information from the base station, the reception level from the base station is measured in descending order of priority, the priority level is high, and the reception level from the base station is predetermined. A mobile station characterized by comprising a control means for selecting a base station that requests allocation of a communication channel to a base station that is higher than a threshold value .
  11. The mobile station according to claim 10, wherein
    Furthermore, it controls with respect to the base station selected in control means, the mobile station; and a transmitting unit for requesting the allocation of the communication channel.
  12. The mobile station according to claim 10 or 11,
    Further, a selection is made based on storage means for storing broadcast information, selection priority order information of base stations and peripheral perch channel information corresponding to each base station included in the broadcast information stored in the storage means A mobile station characterized by comprising measurement means for measuring a reception state of a perch channel in order from a base station having a higher priority.
  13. The mobile station according to claim 12,
    The control means further comprises means for determining whether the reception state of the perch channel measured by the measuring means satisfies a predetermined level value that permits a communication channel allocation request. .
  14. The mobile station according to any one of claims 10 to 13,
    The mobile station characterized in that the transmission means includes means for transmitting a communication channel allocation request to the base station selected by the control means at the time of transmission.
  15. The mobile station according to any one of claims 10 to 14,
    Further, the transmission means has means for transmitting a communication channel allocation request to the base station selected by the control means at the time of an incoming call.
  16. The mobile station according to any one of claims 10 to 15,
    The transmission means further comprises means for transmitting a communication channel assignment request to the base station selected by the control means at the time of channel switching by handover during a call.
JP15528697A 1997-06-12 1997-06-12 Mobile communication system and mobile station and base station of the system Expired - Lifetime JP4154008B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15528697A JP4154008B2 (en) 1997-06-12 1997-06-12 Mobile communication system and mobile station and base station of the system

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP15528697A JP4154008B2 (en) 1997-06-12 1997-06-12 Mobile communication system and mobile station and base station of the system
US08/880,665 US6493561B1 (en) 1996-06-24 1997-06-23 Mobile communication system enabling efficient use of small-zone base stations
US11/008,757 USRE42326E1 (en) 1996-06-24 2004-12-09 Mobile communication system enabling efficient use of small-zone base stations
US11/398,460 USRE42374E1 (en) 1996-06-24 2006-04-05 Mobile communication system enabling efficient use of small-zone base stations
US12/783,778 USRE43138E1 (en) 1996-06-24 2010-05-20 Mobile communication system enabling efficient use of small-zone base stations
US12/847,469 USRE43342E1 (en) 1996-06-24 2010-07-30 Mobile communication system enabling efficient use of small-zone base stations
US12/847,426 USRE43369E1 (en) 1996-06-24 2010-07-30 Mobile communication system enabling efficient use of small-zone base stations

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JP4161028B2 (en) 2002-03-06 2008-10-08 株式会社日立国際電気 Multi-service wireless communication system
JP4886595B2 (en) * 2007-05-25 2012-02-29 株式会社東芝 Mobile communication repeater device, slave station and communication control method
US20090086672A1 (en) * 2007-10-01 2009-04-02 Qualcomm Incorporated Equivalent home id for mobile communications

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