JP4057627B2 - Mobile communication system, radio base station and mobile station - Google Patents

Description

  The present invention relates to a mobile communication system, a radio base station, and a mobile station that determine a radio zone in which the local station should wait based on a received wave coming from a radio base station in a mobile communication system.

In recent years, mobile communication systems are accessed by various mobile stations such as in-vehicle, portable, and the like, and the number of these mobile stations is increasing under the competition performed by a plurality of communication entities.
In such a mobile communication system, a multi-layer cell is configured by appropriately installing a radio base station that forms a micro cell or a pico cell with a small transmission power, particularly in the center of a city with a lot of traffic. .

Furthermore, such wireless base stations with low transmission power are also installed in underpasses and tunnels, and are used to expand the wireless zone to dead zones.
FIG. 14 is a diagram illustrating a configuration example of a conventional mobile communication system.
In the figure, radio base stations 61 ₁ and 61 ₂ are adjacent to radio zones 62 ₁ and 6, respectively.
2 ₂ is formed, of these radio zones, the radio zone 62 _1, hierarchically microcell 63 and the picocell 64 and the forming respective radio base station 61 _3, 61 ₄ are installed. Further, mobile stations 65 _{1 to} 65 _{N that} are communication service targets are located in the wireless zones 62 ₁ and 62 ₂ , the micro cell 63, and the pico cell 64.

In the radio base station 61 ₁ , the antenna 66 ₁ is connected to the antenna terminal of the transmission / reception unit 68 ₁ via the antenna duplexer 67 _1, and the control terminal of the transmission / reception unit 68 ₁ is connected to the base station controller 69 ₁ . The output terminal is connected. The line terminal of the transmission / reception unit 68 ₁ and the communication port of the base station control device 69 ₁ are connected to a control station (not shown) via the transmission device 70 ₁ and the communication link 71 ₁ .

The configuration of the radio base station 61 ₂ to 61 _4, since it is the same as the configuration of the wireless base station 61 _1, the following, for simplicity, each corresponding subscript number for each component "2" to " The same reference numeral “4” is assigned, and the description and illustration thereof are omitted here.
Further, in the mobile station 65 ₁ , the antenna 72 ₁ is connected to the antenna terminal of the transmission / reception unit 74 ₁ via the antenna duplexer 73 ₁ , and the microphone 75 ₁ and the modulation output of the transmission / reception unit 74 ₁ are respectively connected to the microphone 75 ₁ . and a speaker 76 ₁ is connected. The control terminal of the transmission and reception unit 74 ₁ is connected to a control terminal of the control unit 77 _1, the input and output terminals of the control unit 77 _1, the display operation unit 78 ₁ is connected.

The configuration of the mobile stations 65 _{2 to} 65 _N is the same as the configuration of the mobile station 65 ₁ , and in the following, for the sake of simplicity, the corresponding constituent elements are denoted by “2” to “N”, respectively. The same reference numerals are given, and the description and illustration thereof are omitted here.
In the radio base station 61 ₁ in the mobile communication system having such a configuration, the base station control device 69 ₁ performs a “waiting permission level” to be described later as shown in FIG. 15 via the communication link 71 ₁ and the transmission device 70 ₁ . In addition, broadcast information including “standby deterioration level” is generated, and a control radio channel (hereinafter simply referred to as “control channel”) determined in advance via the transmission / reception unit 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ . ) To transmit the broadcast information.

  In the broadcast information, in addition to the above “standby permission level” and “standby deterioration level”, “message type” indicating the broadcast information, and transmission power to be instructed to the mobile station “ “Mobile station transmission power designation”, “position number” indicating the position of the corresponding radio zone (service area), etc. are included, but these information are not directly related to the present invention. Omitted.

Further, of the mobile stations 65 _{1 to} 65 _N , for example, in the mobile station 65 ₁ , the control unit 77 ₁ performs the above-described operation from the radio base station forming these radio zones for all the radio zones where the own station can be located. A control channel table indicating all the radio channels through which the broadcast information is transmitted. Further, the control unit _771, by the power comprehensively controls are the transmission and reception unit 74 ₁ is turned on, sequentially measures the electric field intensity L ₁ control channel registered in the control channel table described above (FIG. 16 (1)) The magnitude relationship between the electric field strength and a predetermined threshold value L _th is discriminated (FIG. 16 (2)).

For the control channel for which the electric field strength greater than the threshold value L _th is obtained in the process of such determination, the control unit 77 ₁ associates the control channel with the electric field strength and determines a predetermined area (hereinafter referred to as a main memory). , Simply referred to as “entrance area candidate register”) (FIG. 16 (3)).
Further, when the control unit 77 _{1 completes} such a series of processes (hereinafter simply referred to as “measurement process”) for all the control channels registered in the control channel table, the control unit 77 ₁ stores in the entry candidate register at that time. It is determined whether or not the control channel is stored (FIG. 16 (4)). If the determination result is true, the contents of the entry candidate registers are sorted in ascending order of the electric field strength (FIG. 16). (Five)).

Further, the control unit 77 ₁ refers to the entrance candidate register when the sorting process is completed, and receives the above-described broadcast information through the individual control channels registered in ascending order of the electric field strength (FIG. 16). At the same time as (6)), the electric field strength is measured again (FIG. 16 (7)). Further, the control unit 77 ₁ compares the electric field strength L ₂ with the “standby permission level” L _th included in the notification information (FIG. 16 (8)), and if the former is below the latter, the entrance candidate register The same comparison is performed for other control channels registered in (1) (FIG. 16 (9)). In the following, a series of processes performed after the measurement process in this way is simply referred to as “entrance area determination process”. When the control unit 77 ₁ recognizes that the electric field strength is lower than the “standby permission level” L _th for any of the control channels by performing the above-described comparison, the control unit 77 ₁ starts the above-described measurement process again (see FIG. 16 (10)).

However, when the electric field strength of any one of these control channels exceeds the “waiting permission level”, the control unit 77 ₁ uses the radio to register the location of the control channel, make a call, or wait for an incoming call. The control channel is determined as a zone control channel (FIG. 16 (11)), and a transition is made to the standby state (FIG. 16 (12)).
Incidentally, the above-described position registration, the outgoing and incoming calls mobile station 65 ₁ and the radio base station 61 ₁ of the operation of each part involved in waiting for, since not directly related to the present invention, in the following, description thereof is omitted.

Further, since the operation of the radio base station 61 ₂ to 61 ₄ and the mobile station 65 ₂ to 65 _N, is the same as the operation described above in the radio base station 61 ₁ and the mobile station 65 _1, respectively, the description is omitted here To do.
As prior art related to the present invention, as disclosed in Patent Document 1 described later, “correspondence between a wired telephone and a cordless terminal is registered in a PBX memory, and a cordless terminal is used for making a call. When disconnected, the wired telephone sends a call signal and the other party telephone number input to the PBX, and the PBX makes a call via the cordless connection device with the cordless terminal corresponding to the wired telephone based on the other party telephone number. Performs setting processing, confirms the call path between the cordless terminal and the destination telephone terminal, and when the incoming call is received, if the cordless terminal is placed on the wired telephone, call the wired telephone and The cordless terminal control system is characterized by enabling the use of a cordless terminal based on the sense of There is Temu ".
JP-A-7-250376

By the way, in the above-described conventional example, the mobile station 65 ₁ is located inside the micro cell 63 and close to the boundary with the wireless zone 62 _{1 as} shown by a dotted line in FIG. When a received wave arriving from 61 ₁ is received with a higher received electric field strength than a received wave arriving from the radio base station 61 _3, a radio zone 62 formed outside the microcell 63 where the own station is actually located. _{In 1} it moved to the standby state.

In such a case, since the microcell 63 and the picocell 64 originally provided to absorb high traffic are not accessed by the mobile station 65 ₁ , the traffic becomes a load on the radio base station 61 ₁ , There was a high possibility that efficiency and service quality would decrease.
In addition, the mobile station 65 ₁ uses the mobile station 651 unnecessarily when the propagation loss of the received wave from the radio base station 61 ₁ increases due to the propagation characteristics of the radio transmission path that fluctuates according to the speed and route of the movement. Possibility of performing the above-mentioned measurement processing or switching the channel during use unnecessarily because the call quality deteriorates even if the call that has occurred in the local station becomes a complete call without going out of service and can enter the call state Was expensive.

Further, when the micro cell 63 or the pico cell 64 is formed for the purpose of relieving the dead zone located inside the wireless zone 62 ₁ , the mobile station 65 ₁ is similarly located outside the actually located cell. In order to shift to the standby state in the wireless zone, the dead zone was not efficiently relieved.
The present invention relates to a mobile communication system, a radio base station, which adapts to a traffic distribution dynamically set by a radio base station and can enter a radio zone where the own station is actually located with high accuracy and enter a standby state. The purpose is to provide a mobile station.

The mobile communication system of the present invention is a mobile communication system having a plurality of radio base stations that constitute overlapping radio zones by a hierarchical cell structure, wherein the radio base station includes the radio zone identification information and the radio zone standby. The mobile station includes notification means for transmitting notification information including level information regarding and a correction value that is smaller than the level information regarding standby, and the mobile station includes reception means for receiving the notification information, and the received notification information Measuring means for measuring the electric field strength of the wireless zone corresponding to the identification information, and standby control means for determining a standby zone candidate based on the measured electric field strength, level information on the standby included in the notification information, and a correction value It is characterized by providing.
Further, the radio base station of the present invention is a radio base station in a mobile communication system having a plurality of radio base stations that form overlapping radio zones by a hierarchical cell structure. It is characterized by comprising notifying means for transmitting notification information including level information related to standby and a correction value that is smaller than the level information related to standby.
Further, the mobile station of the present invention, in a mobile station in a mobile communication system having a plurality of radio base stations constituting a radio zone overlapping by a hierarchical cell structure, the identification information of the radio zone from the radio base station, Receiving means for receiving broadcast information including level information related to standby in the wireless zone, and a correction value that is smaller than the level information related to standby; and an electric field in the wireless zone corresponding to the identification information included in the received broadcast information Measuring means for measuring strength, and standby control means for determining a candidate for a standby zone based on the measured electric field strength, level information on standby included in the notification information, and a correction value.

FIG. 1 is a principle block diagram of a first technique related to the present invention.

A first technique related to the present invention includes a plurality of radio base stations 1 ₁ to 1 _N that individually form a plurality of radio zones and perform radio channel setting control based on a predetermined procedure, Among the radio zones, any one of the radio zones satisfying the standard adapted to the procedure is selected as a standby zone, and the mobile station 2 is provided with a communication service via the standby zone, and includes a plurality of radio base stations 1 _1. ˜1 _N are assigned traffic control means 3 for setting the traffic distribution of a plurality of radio zones, and probability density given under the distribution set by the traffic control means 3 for the plurality of radio zones. Notification information 4 including priority is generated, and notification information 4 is transmitted to the radio zone formed by the own station. The broadcast information receiving means 5 for receiving the radio zones corresponding to the priorities in the ascending order of individual priorities included in the broadcast information received by the broadcast information receiving means 5 And a standby control means 6 as a target.

FIG. 2 is a principle block diagram of the second to fifteenth techniques related to the present invention.
In the second technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and communication service is provided through the wireless zone. And a plurality of radio base stations 11 _{1 to} 11 _N are individually assigned to the stacking order indicating the overlapping order of the zone formed by the own station, the overlapping radio zone and the minimal zone. It has notification means 13 for transmitting notification information in which identification information of a wireless channel is arranged to a wireless channel assigned to the zone among these wireless channels, The mobile station 12 includes broadcast information receiving means 14 for receiving broadcast information transmitted by the broadcast means 13 based on a radio channel setting control procedure, and individual information included in the broadcast information received by the broadcast information receiving means 14. For the wireless channel corresponding to the identification information, the measuring means 15 for measuring the electric field strength, the electric field intensity measured by the measuring means 15 is compared with a preset threshold, and the wireless channel in which the former exceeds the latter is stacked. It has a standby control means 16 for determining a zone assigned with the lowest rank as a standby zone for receiving communication service.

According to a third technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and communication service is provided through the wireless zone. And a plurality of radio base stations 11 _{1 to} 11 _N have identifiers arranged in a stacking order indicating the overlapping order of a zone formed by the own station, a wireless zone overlapping therewith, and a minimum zone. Notification means 13a for transmitting the notification information to the radio channel assigned to the zone, and the mobile station 12 does not receive the notification information transmitted by the notification means 13a. Broadcast information receiving means 14a received based on the procedure of channel setting control, measurement means 15a for measuring the electric field strength for a zone corresponding to each identifier included in the broadcast information received by the broadcast information receiving means 14a, A comparison between the electric field strength measured by the measuring means 15a and a preset threshold value, and the zone in which the stacking order is the lowest of the zones where the former exceeds the latter is determined as a standby zone for receiving communication services. And control means 16a.

According to a fourth technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and a communication service is provided through the zone. The mobile station 12 includes a plurality of radio base stations 11 _{1 to} 11 _N that are individually assigned to a plurality of radio base stations 11 _{1 to} 11 _N , a stacking order indicating an overlapping order of a zone formed by the own station, a radio zone overlapping therewith, and a minimum zone. Broadcasting means 13b for transmitting broadcast information associated with radio channel identification information to a wireless channel assigned to the zone among these wireless channels; Then, the mobile station 12 includes the broadcast information transmitted by the broadcast means 13b in the broadcast information received by the broadcast information receiving means 14b and the broadcast information receiving means 14b that receives the broadcast information based on the radio channel setting control procedure. For the wireless channel corresponding to each identification information, the measuring means 15b for measuring the electric field strength, the electric field intensity measured by the measuring means 15b and a preset threshold value are compared, and the former is a wireless channel in which the former exceeds the latter. In the notification information received by the notification information receiving means 14b, a standby control means 16b for obtaining a zone whose identification information corresponds to the lowest stacking order and determining the zone as a standby zone for receiving communication services is provided. It is characterized by having.

According to a fifth technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and a communication service is provided through the zone. The mobile station 12 includes a plurality of radio base stations 11 _{1 to} 11 _N that are individually assigned to a plurality of radio base stations 11 _{1 to} 11 _N , a stacking order indicating an overlapping order of a zone formed by the own station, a radio zone overlapping therewith, and a minimum zone. The mobile station 12 has broadcast means 13c for transmitting broadcast information associated with an identifier to a radio channel assigned to the zone among these radio channels. Corresponds to the broadcast information receiving means 14c for receiving the broadcast information transmitted by the broadcast means 13c based on the procedure of radio channel setting control, and the individual identifiers included in the broadcast information received by the broadcast information receiving means 14c. For the zone, the measuring means 15c for measuring the electric field strength, the electric field intensity measured by the measuring means 15c is compared with a preset threshold value, and the former is received by the notification information receiving means 14b out of the zones exceeding the latter. In the broadcast information, a zone corresponding to the lowest stacking order of identifiers is obtained, and standby control means 16c for determining the zone as a standby zone for receiving communication service is provided.

According to a sixth technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and a communication service is provided through the zone. A plurality of radio base stations 11 _{1 to} 11 _N that have radio channels assigned to the zones formed by the mobile stations 12 and that overlap with the zones in addition to identification information indicating the radio channels. For the zone and the minimum zone, the mobile station 12 has notification means 13d for transmitting notification information in which the identification information is associated with the stacking order indicating the overlapping order. Broadcast information receiving means 14d for receiving broadcast information transmitted by the knowledge means 13d based on the procedure of radio channel setting control, and radio corresponding to individual identification information included in the broadcast information received by the broadcast information receiving means 14d For the channel, the measurement means 15d for measuring the electric field strength and the electric field intensity measured by the measurement means 15d are compared with a preset threshold, and the former is received by the broadcast information receiving means 14d among the radio channels in which the former exceeds the latter. In the broadcast information obtained, priority is given to the identification information corresponding to some stacking order, and the channel having the lowest stacking order is obtained, and the zone to which the wireless channel is assigned is determined as a communication service. Standby control means 16d for determining the standby zone to receive And wherein the Rukoto.

A seventh technique related to the present invention separately forms one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones, and performs radio channel setting control based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and a communication service is provided through the zone. The mobile station 12 includes a plurality of radio base stations 11 _{1 to} 11 _N, and a zone formed by the own station, in addition to identification information indicating the radio channel, and a radio zone and a minimum zone overlapping the zone, It has a notification means 13e for transmitting notification information in which identifiers are individually associated with the stacking order indicating the overlapping order, and is transmitted to the mobile station 12 by the notification means 13e. Measurement information receiving means 14e for receiving broadcast information based on the procedure of radio channel setting control, and measurement for measuring electric field strength for zones corresponding to individual identifiers included in the broadcast information received by broadcast information receiving means 14e The means 15e and the electric field intensity measured by the measuring means 15e are compared with a preset threshold, and in the notification information received by the notification information receiving means 14e in the zone where the former exceeds the latter, the identifier is And a standby control means 16e for obtaining a zone to which the lowest stacking order is assigned while giving priority to the one corresponding to the ranking, and determining the zone as a standby zone for receiving communication services. Features.

In an eighth technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and communication service is provided through the wireless zone. And a plurality of radio base stations 11 _{1 to} 11 _N have radio channels assigned to zones formed by the own station, and radio zones and minimum zones that overlap the zones. The stacking order indicating the peers and subordinates, and the identification information of the radio channels individually assigned to these zones, radio zones, and minimum zones are arranged. The mobile station 12 receives the broadcast information transmitted by the broadcast means 13f based on the procedure of the radio channel setting control, and individually receives the broadcast information according to the format of the broadcast information. Corresponding to the individual identification information obtained by the broadcast information receiving means 14f and the broadcast information receiving means 14f for obtaining the stacking order of the zones to which the radio channels corresponding to these pieces of identification information are assigned. For the wireless channel to be measured, the measuring means 15f for measuring the electric field strength, the electric field intensity measured by the measuring means 15f and the preset threshold value are compared, and among the wireless channels in which the former exceeds the latter, the stacking order is the lowest The standby control means 16f for determining the zone assigned as the standby zone for receiving communication service provision Characterized in that it has a.

According to a ninth technique related to the present invention, one or a plurality of radio zones and one or a plurality of minimum zones overlapping the radio zones are individually formed, and radio channel setting control is performed based on a predetermined procedure. A wireless zone formed by any one of the plurality of wireless base stations 11 _{1 to} 11 _N and the plurality of wireless base stations 11 _{1 to} 11 _N is accessed based on the procedure, and communication service is provided through the wireless zone. And a plurality of radio base stations 11 _{1 to} 11 _N are provided in a zone formed by the own station, and the zones are the same and lower levels with respect to the radio zone and the minimum zone that overlap each other. Mobile station 12 having broadcast means 13g for transmitting broadcast information in which a stacking order indicating the IDs and identifiers individually indicating these zones, radio zones, and minimum zones are arranged. Receives broadcast information transmitted by the notification means 13g based on the procedure of radio channel setting control, and includes all identifiers included individually based on the format of the broadcast information and the stacking order of zones corresponding to these identifiers For the zone corresponding to each identifier determined by the notification information receiving means 14g, and the electric field strength measured by the measuring means 15g are preset. The standby control means 16g for comparing the threshold value thus determined and determining the zone having the lowest stacking order determined by the notification information receiving means 14g as the standby zone for receiving communication service, among the zones where the former exceeds the latter. It is characterized by having.

According to a tenth technology related to the present invention, in the mobile communication system according to any one of the second to seventh technologies related to the present invention, the notification unit includes a zone formed by the own station and a radio zone overlapping therewith. And a threshold value individually set for the minimal zone in association with the stacking order and added to the notification information. The standby control means 16 compares the threshold value added to the notification information by the notification means with the electric field strength. It is a target.

In an eleventh technology related to the present invention, in the mobile communication system according to any of the second to seventh technologies related to the present invention, the notification means is preset for a zone formed by the own station. Means for adding a relative value indicating the threshold value as a difference from the standard value of the threshold value to the broadcast information, and the broadcast information receiving means includes the relative value added to the broadcast information in the zone where the broadcast information is received. The standby control means includes a relative value obtained by the notification information receiving means in association with the zone in which the electric field strength is measured for each electric field strength measured by the measuring means. It is characterized in that a sum with a value is a comparison target.

A twelfth technique related to the present invention is a mobile communication system according to any one of the second to seventh techniques related to the present invention. The zone and the minimum zone include means for adding a relative value indicating a threshold value set individually in advance as a difference from a common standard value of these threshold values to the notification information in association with the stacking order. The sum of the relative value and the standard value is a target for comparison with the electric field strength.

A thirteenth technology related to the present invention is a mobile communication system according to any one of the second to twelfth technologies related to the present invention. When the field strength is measured cyclically, the field strength is compared with the lower limit value that allows entry, and when the former exceeds the latter, the measurement and comparison process is terminated, and the corresponding radio zone is notified. The receiving means 14 is provided with an in-zone determining means 17 for selecting notification information as a candidate to be received.

The fourteenth technology related to the present invention is the mobile communication system according to any of the second to thirteenth technologies related to the present invention, wherein the standby control means is configured to measure the electric field strength measured by the measurement means. A comparison is made with threshold values in descending order of the stacking order of the zones to be measured, and when the former exceeds the latter, the corresponding zone is determined as a standby zone.

According to a fifteenth technology related to the present invention, in the mobile communication system related to the thirteenth technology related to the present invention, the measurement means measures the radio zone selected as a candidate by the entrance determination means 17. Omitted and includes means for substituting the electric field intensity measured by the entrance determination means.
FIG. 3 is a block diagram showing the principle of the sixteenth technique related to the present invention.

According to a sixteenth technology related to the present invention, radio channel setting control is performed on broadcast information including priorities assigned in descending order of preset traffic distributions for radio zones individually formed by a plurality of radio base stations. The broadcast information receiving means 21 that receives the information according to the above procedure, and the radio zones corresponding to the priorities included in the broadcast information received by the broadcast information receiving means 21 among the plurality of wireless zones, in ascending order of priority. It is determined whether or not a criterion adapted to the procedure is satisfied, and a standby unit 23 that selects a wireless zone for which the determination result is true as a standby zone, and a plurality of standby zones selected by the standby unit 23 A communication control means 25 configured to receive a communication service provided by a radio base station that forms a standby zone among the radio base stations. The mobile communication system according to the first technology relating to the present invention, the traffic control unit 3 provided separately to the radio base station 1 ₁ to 1 _N for the radio zone formed by the these wireless base station 1 ₁ to 1 _N The traffic distribution is set, and the notification unit 4 transmits the notification information including the priority assigned in the order of the probability density given under the distribution to the radio zone.

On the other hand, in the mobile station 2, the broadcast information receiving means 5 receives such broadcast information, and the standby control means 6 selects the radio zones corresponding to the priorities in ascending order of individual priorities included in the broadcast information. It is the target of selection of the standby zone.
In general, the above-described priorities can be appropriately set according to the events generated by the radio base stations 1 ₁ to 1 _N in their own stations, so that the actual operational status of these radio base stations 1 ₁ to 1 _N In addition, the distribution of mobile stations entering each radio zone is dynamically varied while adapting to the operation mode.

In the mobile communication system according to the second technique related to the present invention, the radio base stations 11 _{1 to} 11 _N each form a minimal zone that overlaps the radio zone or another radio zone. As described above, the informing means 13 individually provided in the radio base stations 11 _{1 to} 11 _N are as described above with respect to the radio zone formed by the own station and other radio zones and minimum zones overlapping therewith. Broadcast information including identification information of radio channels individually assigned to the stacking order indicating the overlapping order is transmitted to the radio channels assigned to the zone among these radio channels.

  In the mobile station 12, the broadcast information receiving means 14 receives the broadcast information described above based on the procedure of radio channel setting control, and the measuring means 15 is the radio channel corresponding to the individual identification information included in the received broadcast information. Measure the electric field strength. Further, the standby control means 16 compares the electric field intensity measured in this way with a preset threshold value, and assigns the radio channel whose former is higher than the latter, the one having the lowest layering order. The designated zone is set as a standby zone.

Therefore, when there are a plurality of radio zones formed at the position of the mobile station 12, the mobile station 12 can shift to a standby state by preferentially selecting a minimum zone among these radio zones.
In the mobile communication system according to the third technique related to the present invention, the radio base stations 11 _{1 to} 11 _N each form a minimal zone that overlaps the radio zone or another radio zone. As described above, the notification means 13a individually provided in each of these radio base stations 11 _{1 to} 11 _N is as described above for the radio zone formed by the own station and the other radio zones and the minimum zones overlapping therewith. Broadcast information comprising identifiers individually assigned to the stacking order indicating the overlapping order is transmitted to the radio channel assigned to the zone.

  In the mobile station 12, the broadcast information receiving unit 14a receives the broadcast information described above based on the procedure of radio channel setting control, and the measuring unit 15a receives the electric field of the radio channel corresponding to the individual identifier included in the received broadcast information. Measure strength. Further, the standby control means 16 compares the electric field intensity measured in this way with a preset threshold value, and waits for the zone having the lowest stacking order among the wireless zones in which the former exceeds the latter. The zone is the target of standby.

Therefore, when there are a plurality of radio zones formed at the position of the mobile station 12, the mobile station 12 can shift to a standby state by preferentially selecting a minimum zone among these radio zones.
In the mobile communication system according to the fourth technique related to the present invention, the notification means 13b provided in the radio base stations 11 _{1 to} 11 _N has the following information about the zone formed by the own station, the radio zone overlapping the local zone, and the minimum zone: Broadcast information in which the stacking order indicating the overlapping order is associated with the identification information of the radio channel assigned individually is transmitted to the radio channel assigned to the zone among these radio channels.

  In the mobile station 12, the broadcast information receiving means 14b receives the broadcast information described above based on the procedure of radio channel setting control, and the measuring means 15b is about the radio channel corresponding to the individual identification information included in the received broadcast information. Measure the field strength. The standby control means 16b compares the electric field intensity measured in this way with a preset threshold value, and identifies the identification information in the broadcast information received by the broadcast information receiving means 14b among the radio channels in which the former exceeds the latter. A zone corresponding to the lowest stacking order of information is obtained, and a zone to which the zone is assigned is set as a standby zone as a standby target.

That is, when there are a plurality of radio zones formed at the position of the mobile station, the mobile station can shift to a standby state by preferentially selecting a minimum zone among these radio zones, and Since the identification information is included in the notification information regardless of the stacking order, the flexibility for expansion and configuration change related to the radio zone is improved.
In the mobile communication system according to the fifth technique related to the present invention, the notification means 13c provided in the radio base stations 11 _{1 to} 11 _N is configured to detect the zone formed by the own station, the radio zone overlapping the local zone, and the minimum zone. Broadcast information in which the stacking order indicating the overlapping order is associated with the individually assigned identifier is transmitted to the radio channel assigned to the zone among these radio channels.

  In the mobile station 12, the broadcast information receiving unit 14c receives the broadcast information described above based on the procedure of radio channel setting control, and the measurement unit 15c applies the electric field for the zone corresponding to each identifier included in the received broadcast information. Measure strength. The standby control means 16c compares the electric field intensity measured in this way with a preset threshold value, and in the broadcast information received by the broadcast information receiving means 14c in the wireless zone where the former exceeds the latter, the identifier Obtains a zone corresponding to the lowest stacking order and sets the zone to which the zone is assigned as a standby zone as a standby target.

That is, when there are a plurality of radio zones formed at the position of the mobile station, the mobile station can preferentially select a minimum zone among these radio zones and shift to a standby state, and notify Since the identifier is included in the information regardless of the stacking order, the flexibility for expansion or configuration change related to the wireless zone is improved.
In the mobile communication system according to the sixth technique related to the present invention, the notification means 13d provided in the radio base stations 11 _{1 to} 11 _N is connected to the radio channel assigned to the zone formed by the own station. In addition to the identification information indicating, for the radio zone and the minimal zone overlapping the zone, broadcast information in which the identification information is individually associated with the stacking order indicating the overlapping order is transmitted.

  In the mobile station 12, the broadcast information receiving means 14d receives the broadcast information described above based on the procedure of radio channel setting control, and the measurement means 15d is for the radio channel corresponding to the individual identification information included in the received broadcast information. Measure the field strength. The standby control means 16d compares the electric field intensity measured in this way with a preset threshold value, and in the broadcast information received by the broadcast information receiving means 14d, the identification information is received from the wireless channel in which the former exceeds the latter. The wireless channel assigned to the one with the lowest stacking order is obtained while giving priority to information corresponding to some stacking order, and the zone to which the wireless channel is assigned is set as a standby zone as a standby target.

  That is, when the broadcast information does not include the stacking order of the radio base stations that transmit the broadcast information and there are multiple radio zones formed at the position of the mobile station, the mobile station Since the minimum zone can be selected with priority and can be shifted to the standby state, the transmission efficiency of the radio channel through which such broadcast information is transmitted can be improved, and the flexibility of expansion or configuration change related to the radio zone can be improved. Sex is secured.

In the mobile communication system according to the seventh technique related to the present invention, the notification means 13e provided in the radio base stations 11 _{1 to} 11 _N is combined with identification information indicating the radio channel in the zone formed by the own station. Then, for the wireless zone and the minimal zone that overlap the zone, the broadcast information in which the stacking order indicating the overlapping order is individually associated with the identifier is transmitted.
In the mobile station 12, the broadcast information receiving means 14e receives the broadcast information described above based on the procedure of radio channel setting control, and the measuring means 15e is for the radio channel corresponding to the individual identification information included in the received broadcast information. Measure the field strength. The standby control means 16d compares the electric field intensity measured in this way with a preset threshold value, and in the notification information received by the notification information receiving means 14e in the zone where the former exceeds the latter, the identifier is A zone corresponding to a certain stacking order is prioritized and a zone to which an identifier having the lowest stacking order is assigned is obtained, and that zone is set as a standby zone.

  That is, when the broadcast information does not include the stacking order of the radio base stations that transmit the broadcast information and there are multiple radio zones formed at the position of the mobile station, the mobile station Since the minimum zone can be selected with priority and can be shifted to the standby state, the transmission efficiency of the radio channel through which such broadcast information is transmitted can be improved, and the flexibility of expansion or configuration change related to the radio zone can be improved. Sex is secured.

In the mobile communication system according to the eighth technique related to the present invention, the notification means 13f provided in the radio base stations 11 _{1 to} 11 _N has the zone assigned to the radio channel assigned to the zone formed by the own station. The stacking order indicating that the radio zone and the minimum zone overlap with each other and the subordinate zone are arranged, and the identification information of the radio channels individually assigned to these zones, the radio zone, and the minimum zone are arranged. Broadcast information is transmitted.

  In the mobile station 12, the broadcast information receiving means 14f receives the broadcast information described above based on the radio channel setting control procedure, and the measuring means 15f is for the radio channel corresponding to the individual identification information included in the received broadcast information. Measure the field strength. The standby control unit 16f compares the electric field strength measured in this way with a preset threshold value, and the zone in which the lowest stacking order is assigned among the wireless channels in which the former exceeds the latter is assigned. Set as a standby zone as a standby zone.

  That is, the broadcast information does not include the stacking order of zones formed by radio base stations other than the radio base station that transmits the broadcast information, and there are a plurality of radio zones formed at the position of the mobile station, Since the mobile station can preferentially select the minimum zone among these radio zones and shift to the standby state, the transmission efficiency of the radio channel through which such broadcast information is transmitted is improved, and the radio station Flexibility for expansion and configuration changes related to zones is ensured.

In the mobile communication system according to the ninth technique related to the present invention, the notification means 13g provided in the radio base stations 11 _{1 to} 11 _N includes a radio zone in which the zone overlaps with a zone formed by the own station. Broadcast information is transmitted in which a stacking order indicating that the minimum zone is the same and a lower level, and identifiers individually indicating these zones, radio zones, and minimum zones are transmitted.

  In the mobile station 12, the broadcast information receiving means 14g receives the broadcast information described above based on the procedure of radio channel setting control, and corresponds to all identifiers included individually based on the format of the broadcast information and these identifiers. The stacking order of the obtained zones is obtained. In addition, the measuring unit 15e measures the electric field strength for the radio channel corresponding to each piece of identification information included in the received broadcast information. The standby control unit 16g compares the electric field strength measured in this way with a preset threshold value, and the stacking order obtained by the notification information receiving unit 14g is the lowest in the zone where the former exceeds the latter. A certain zone is obtained, and the zone is set as a standby zone as a standby zone.

  That is, when the broadcast information does not include the stacking order of the radio base stations that transmit the broadcast information and there are multiple radio zones formed at the position of the mobile station, the mobile station Since the minimum zone can be selected with priority and can be shifted to the standby state, the transmission efficiency of the radio channel through which such broadcast information is transmitted can be improved, and the flexibility of expansion or configuration change related to the radio zone can be improved. Sex is secured.

In the mobile communication system according to the tenth technology related to the present invention, in the mobile communication system related to any one of the second to seventh technologies related to the present invention, the notification means is a zone formed by the own station. The thresholds individually set in advance for the overlapping wireless zone and the minimal zone are added to the notification information in association with the stacking order, and the standby control means compares these threshold values with the electric field strength for each zone.

That is, since the minimum electric field strength that the mobile station is allowed to transition to the standby state in the individual radio zone and the minimum zone is set under the initiative of the radio base station, the mode of operation related to each radio zone, Flexible adaptation to traffic distribution, expansion, etc. becomes possible.
In the mobile communication system according to the eleventh technology related to the present invention, the notification means uses, as notification information, a relative value indicating a preset threshold value as a difference from the standard value of the threshold value for a zone formed by the own station. In addition, the broadcast information receiving means obtains the relative value added to the broadcast information in association with the received zone. Furthermore, the standby control means
For each electric field strength measured by the measuring means, the sum of the relative value and the standard value, which are associated with the zone where the electric field strength is measured and obtained by the notification information receiving means, is to be compared.

That is, the minimum electric field strength that is allowed for the mobile station to enter the standby state in each zone is included in the broadcast information for each zone as a relative value that is smaller than the electric field strength. Compared with the mobile communication system according to the tenth technology , the transmission efficiency of the radio channel used for transmitting the broadcast information can be improved.
In the mobile communication system according to the twelfth technology related to the present invention, the notification means uses a threshold value set individually in advance for a zone formed by the own station, a radio zone overlapping with the zone, and a minimum zone. A relative value indicated as a difference from the standard value is added to the notification information in association with the stacking order, and the standby control means uses the sum of the relative value and the standard value as a target for comparison with the electric field strength.

That is, for both the individual radio zone and the minimal zone that overlaps with the radio zone, the minimum electric field strength that the mobile station is allowed to enter the standby state is indicated in the broadcast information as a relative value that is smaller than the electric field strength. Therefore, compared with the mobile communication system according to the eleventh technology related to the present invention, the transmission efficiency of the radio channel used for transmitting the broadcast information is further improved.

In the mobile communication system according to the thirteenth technology related to the present invention, the entrance determination means 17 provided in the mobile station 12 measures the electric field strength of the radio zone in which the local station can be located cyclically. Compare the electric field strength with the lower limit value that allows entry, and when the former exceeds the latter, stop the measurement and comparison process, and broadcast information receiving means should receive broadcast information for the corresponding radio zone Select as a candidate.

That is, since the mobile station 12 selects the wireless zone candidates to be shifted to the standby state without determining the electric field strength for all the wireless zones including the minimal zone, the second to twelfth related to the present invention. Compared with the mobile communication system related to this technology, it is possible to quickly shift to the standby state after starting or after leaving the service area.
In the mobile communication system according to the fourteenth technology related to the present invention, the standby control means compares the electric field intensity measured by the measuring means with the threshold value in the descending order of the stacking order of the zones to be measured. When the former exceeds the latter, the corresponding zone is determined as the standby zone.

That is, since the mobile station 12 selects a radio zone to be shifted to a standby state without determining the electric field strength for all radio zones including the minimum zone, the second to thirteenth techniques related to the present invention. Compared to the mobile communication system related to the above, it is possible to promptly shift to the standby state after starting or after leaving the service area.
In the mobile communication system related to the fifteenth technology related to the present invention, in the mobile communication system related to the thirteenth technology related to the present invention, the measuring means 15 is selected as a candidate by the entrance determining means 17 For the wireless zone, the measurement is omitted, and the electric field strength measured by the entrance determination means is substituted.

That is, the mobile station 12 is reduced in the time required to measure the electric field strength for determining the magnitude relationship with the threshold value in order to shift to the standby state, and is therefore related to the second to thirteenth techniques according to the present invention. Compared to a mobile communication system, it is possible to quickly shift to a standby state after starting or after going out.
In the mobile station apparatus according to the sixteenth technology related to the present invention, the broadcast information receiving means 21 receives broadcast information transmitted from the base station, and the waiting means 23 is an individual information whose priority is included in the broadcast information. For the wireless zone, it is determined whether or not the criteria adapted to the wireless channel setting control procedure is satisfied in ascending order of priority, and the wireless zone for which the determination result is true is selected as the standby zone. The communication control means 25 is provided with a communication service via the radio base station that forms the standby zone selected in this way.

Further, the above-described priorities are assigned by individual radio base stations in the descending order of a preset traffic distribution for radio zones formed by a plurality of radio base stations.
Therefore, the distribution of mobile stations entering these wireless zones is dynamically set according to the priority set by the wireless base station.
Further, in the invention related to the present invention, “in a mobile station used in a mobile communication system including a plurality of base stations that form a radio zone and transmit priority information of the radio zone, A mobile station characterized by comprising a control means for selecting a radio zone by using the received radio zone priority order in preference to the order is used.
In another technique related to the present invention, “in a mobile station used in a mobile communication system including a plurality of base stations that form a radio zone and transmit priority information of the radio zone, the mobile station When selecting one zone from a plurality of zones that can receive signals from the base station under a predetermined reception situation, the priority order of the received radio zones is prioritized over the order of superiority or inferiority of the reception situation. And a mobile station characterized by comprising a control means for selecting a radio zone.
In another technique related to the present invention, “mobile used in a mobile communication system having a plurality of radio base stations that form a hierarchical cell structure and broadcast information including the order of priority of cells” A mobile station characterized by comprising control means for performing cell selection so that a cell having the highest priority is given priority over a cell that provides the best reception status in the station.

As described above, the mobile station according to the present invention includes a minimum zone formed for the purpose of absorbing traffic and relieving the dead zone, and the priority given by the radio base station, among the radio zones where the own station is actually located. It is possible to shift to the standby state by preferentially selecting the one with a high value.
Therefore, in the mobile communication system to which these inventions are applied, the radio frequency, hardware and other resources are effectively used in combination with the minimum zone, and the service quality is improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Features of the first embodiment of the present invention, the configuration of the broadcast information by the base station controller 69 ₁ to 69 ₄ are sent separately to the control channel in the radio base station 61 ₁ to 61 _4, to such broadcast information depending controller 77 _1-77 of mobile station 65 ₁ to 65 _N to _N has to the procedure of the processing of the radio channel setting control performed respectively, the configuration of the hardware, since it is the same as the conventional example shown in FIG. 14 The description is omitted here.

As to the correspondence relationship between the block diagram shown in this embodiment and FIG. 1, the radio base station 61 ₁ to 61 ₄ correspond to the radio base station 1 ₁ to 1 _N, the traffic control unit 3 and the notification unit 4, the mobile Stations 65 _{1 to} 65 _N correspond to the mobile station 2, the broadcast information receiving means 5 and the standby control means 6.
The operation of the first embodiment of the present invention will be described below with reference to FIG.
In the radio base station 61 ₁ to 61 _4, the base station controller 69 ₁ to 69 _4, the day for the radio zone 62 _{1-62 4} respectively, and other operation mode time zone, in the own station and predetermined other stations Adapt to a combination of actual traffic volumes and these radio zones 62 _{1 to} 6
Having a not shown database and combinations of weights representing the amount of traffic to be distributed to 2 _4.

The base station controller 69 ₁ to 69 _4, by monitoring based calls that occurred in the mobile station located in a radio zone in which each local station to form the steps in the radio channel setting control, traffic in the radio zone The amount of traffic is measured, and the amount of traffic is notified to other stations via a communication link (not shown).
Furthermore, the base station controller 69 ₁ to 69 _4, respectively the amount of traffic measured in this way the local station, the amount of individually notified traffic from other stations, the day and time at that time By referring to the above-mentioned database based on the combination of the above, a combination of weights adapted to the combination of these traffic amounts is obtained, and these combinations are respectively determined as the wireless zones 62 _{1 to} 62 ₄ (or the wireless base stations 61 ₁ to 61 with inclusion in the broadcast information in association with 61 _4), the broadcast information transmitting and receiving unit 68 ₁ to 68 _4, and transmits via the antenna duplexer 67 _{1-67 4} and the antenna 66 _{1-66 4.}

On the other hand, in the mobile station 65 ₁ , the control unit 77 ₁ performs the measurement process and the entrance area determination process in the same manner as in the conventional example, but the entrance area determination process has a condition as an entrance area. When there are a plurality of wireless zones, the higher the weight included in the above-described notification information, the higher the priority, and the transition to the standby state is made by setting the priority as a destination candidate.
As described above, according to the present embodiment, the distribution of mobile stations that dynamically enter a standby state in each radio zone while adapting to the actual operation status and operation mode of the radio base station can be varied. The wireless base station, the radio frequency and other resources can be effectively used while flexibly adapting to the demands of the system.

  In the present embodiment, the weight is set corresponding to the traffic distribution in each wireless zone in accordance with the day of the week and the time zone. However, the present invention is not limited to such a setting method. For events recognized in the process of monitoring control and radio channel setting control performed at each radio base station, such as faults in the network and their recovery, and radio channel congestion, weights adapted to the events are appropriately set. Also good.

FIG. 4 is an operation flowchart of the second and eighth embodiments of the present invention.
Feature of the present invention, in the present embodiment, the configuration of the broadcast information by the base station controller 69 ₁ to 69 ₄ are sent separately to the control channel in the radio base station 61 ₁ to 61 _4, depending on such broadcast information control unit 77 ₁ to 77 _N of the mobile station 65 ₁ to 65 _N Te has to the procedure of the processing of the radio channel setting control performed respectively, the configuration of the hardware, since it is the same as the conventional example shown in FIG. 14, The description is omitted here.

Incidentally, the present invention to the correspondence between the block diagrams shown in the second embodiment and FIGS 2 and 3, the radio base station 61 ₁ to 61 ₄ are the radio base station 11 ₁ to 11 _N and the notification means 13,13a Mobile stations 65 _{1 to} 65 _N are mobile stations 12, broadcast information receiving means 14, 14 a to 14 g, 21, measuring means 15, 15 a to 15 g, standby control means 16, 16 a to 16 g, entrance determination Corresponding to the means 17, the standby means 23 and the communication control means 25.

The operation of the second embodiment of the present invention will be described below with reference to FIG. 4 and FIG. In the following, for simplicity, of the mobile station 65 ₁ to 65 _N, for the case where the mobile station 65 ₁ is located at a point as in the conventional example, illustrating the operation of each section.
In the radio base station 61 ₁ , the base station control device 69 ₁ has a radio zone (hereinafter, referred to as “hierarchical zone”) formed hierarchically like the above-described microcell 63 or picocell 64 in the local zone of the radio zone formed by itself. When there is no “overlap zone”), broadcast information in the same format as in the conventional example as shown in FIG. 15 is transmitted via the transceiver 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ .

However, on the contrary, when there is such an overlap zone, the base station controller 69 ₁ has the identification number C _{1 of} the control channel (hereinafter simply referred to as “control channel”) formed by the own station. Control numbers (C ₃ and C ₄ ) of control channels (hereinafter referred to as “duplicate control channels”) individually assigned to these overlap zones are not shown via the communication link 71 ₁ and the transmission device 70 _1. From the station. The base station controller 69 ₁ takes in the identification numbers C ₁ , C _{2 to} C ₄ of these control channels and the duplicate control channel, and overlaps these identification numbers as shown by shading in FIG. The identification information columns C ₄ , C ₃ , C ₁ shown in the order of stacking zones (or the opposite order) are transmitted as notification information together with the previously described “standby permission level” and “standby deterioration level”.

On the other hand, the mobile station 65 _1, the control unit 77 ₁ performs the conventional example Likewise measurement process and Iriken determination process, in the course of its Iriken determination processing, the target of measurement of the field intensity L ₂ Whether the format of the broadcast information received via the control channel is the same as the conventional example shown in FIG. 15 is determined based on the presence / absence of the identification information column (FIG. 4 (1)). ).
Furthermore, when the result of such determination is true, the control unit 77 ₁ shifts to a standby state by performing an entrance area determination process based on the same procedure as in the conventional example (FIG. 4 (2)). .

On the other hand, if the result is false, the control unit 77 ₁ determines the area (hereinafter referred to as the following) in which the columns C ₄ , C ₃ , and C ₁ of the identification information included in the notification information described above are reserved in the main memory. (Referred to as “entry candidate selection register”) (FIG. 4 (3)). In addition, the control unit 77 ₁ sequentially refers to the identification information C ₄ , C ₃ , and C ₁ stored in the entrance candidate selection register so that the duplicate control corresponding to the identification numbers individually indicated by these identification information is performed. The electric field strength L ₃ is measured for the channel and the control channel (FIG. 4 (4)), and the electric field strength is compared with the standby permission level L _th received as broadcast information through these channels (FIG. 4 (5) )).

Further, the control unit 77 ₁ leaves the corresponding identification information of the entrance candidate selection register when the electric field intensity L ₃ exceeds the standby permission level L _th under such a comparison, but conversely, when it falls below The corresponding identification information is deleted (FIG. 4 (6)).
In addition, when the control unit 77 ₁ completes the above-described processing for all the identification information stored in the entry candidate careful selection table in this way, whether or not any identification information remains in the entry candidate candidate careful selection table at that time. Is discriminated (FIG. 4 (7)). Further, when the result of the determination is false, the control unit 77 ₁ shifts to a standby state by performing an entrance area determination process based on the same procedure as in the conventional example (FIG. 4 (8)).

However, if true, on the other hand, the control unit 77 ₁ determines that the radio station should wait for the duplicate control channel (or control channel) indicated by the identification information stored _first in the entrance candidate selection table. The control channel is determined, and the control channel shifts to the standby state (FIG. 4 (9)).
As described above, according to the present embodiment, the mobile stations 65 _{1 to} 65 _N give priority to the microcell 63 over the radio zone 62 ₁ and further set the picocell 64 over the microcell 63 to wait. Compared to the conventional example in which the target is determined in preference to the ascending order of the electric field strength of the control channel, it is possible to perform standby with higher accuracy in the wireless zone actually located.

In the embodiment described above, the mobile station to which the sixteenth technology related to the present invention is applied as the mobile stations 65 _{1 to} 65 _N of the mobile communication system related to the second and third technologies related to the present invention. However, the mobile station adapts not only to this embodiment but also to each embodiment described later.
FIG. 6 is an operation flowchart of the third and fourth embodiments of the present invention.

The operation of the third embodiment of the present invention will be described below with reference to FIGS. In the following, for simplicity, of the mobile station 65 ₁ to 65 _N, for the case where the mobile station 65 ₁ is located at a point as in the conventional example, illustrating the operation of each section.
In the radio base station 61 ₁ , the base station control device 69 ₁ determines that the local zone of the radio zone 62 ₁ formed by the own station does not have an overlap zone such as the micro cell 63 or the pico cell 64 described above. 15 is transmitted through the transmission / reception unit 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ .

On the contrary, if there is such an overlap zone, the base station controller 69 ₁ assigns the control channel identification number C ₁ assigned to the own station and these overlap zones. Along with the identification numbers C ₃ and C _{4 of the} overlapping control channels, numerical values (stacking) indicating the overlapping order of the radio zones 62 ₁ , microcells 63 and picocells 64 to which these control channels and the overlapping control channels are assigned for each zone. (Rank) P ₁ , P ₃ , P ₄ are given from a control station (not shown) via the communication link 71 ₁ and the transmission device 70 ₁ . In the following, such a numerical value is simply referred to as “priority order”. For simplicity, “0 (= P ₁ )”, “1 (=” in the order of the wireless zone 62 ₁ , the microcell 63, and the picocell 64. P ₃ ) ”and“ 2 (= P ₄ ) ”.

The base station controller 69 ₁ takes in the identification numbers C ₁ , C _{2 to} C ₄ and the priorities P ₁ , P ₃ , P ₄ described above, and identifies them as shown in FIG. A column of identification information (C ₁ , P ₁ , C ₃ , P ₃ , C ₄ , P ₄ ) in which numbers and priorities are associated in a predetermined format is referred to as the “standby permission level” described above. And it transmits as notification information together with “standby deterioration level”.

On the other hand, the mobile station 65 _1, the control unit 77 ₁ performs the conventional example Likewise measurement process and Iriken determination process, in the course of its Iriken determination processing, the target of measurement of the field intensity L ₂ Whether or not the format of the broadcast information received via the control channel is the same as that of the conventional example shown in FIG. 15 is determined based on the presence or absence of the above-described identification information column (FIG. 6 (1)). .
Furthermore, when the result of such determination is true, the control unit 77 ₁ shifts to a standby state by performing an entrance area determination process based on the same procedure as in the conventional example (FIG. 6 (2)). .

On the contrary, if the result is false, the control unit 77 ₁ determines the sequence of identification information (C ₁ , P ₁ , C ₃ , P ₃ , C ₄ , P ₄ ) included in the broadcast information described above. Is stored in an area reserved in the main memory in advance (hereinafter referred to as “entry area candidate selection register”) (FIG. 6 (3)). Further, the control unit 77 ₁ sorts the combinations of the identification numbers and the priorities stored in the entrance candidate selection register in this way in the ascending order of the priorities, and deletes all priorities. A string of identification information consisting only of identification numbers is generated on the entrance candidate careful selection register (FIG. 6 (a)).

Further, the control unit 77 ₁ sequentially refers to the individual identification information items C ₄ , C ₃ , and C ₁ that constitute the identification information column, so that the duplicate control corresponding to the identification numbers individually indicated by these identification information items is performed. The electric field strength L ₃ is measured for the channel and the control channel (FIG. 6 (4)), and the electric field strength is compared with the standby permission level L _th received as broadcast information through these channels (FIG. 6 (5) )).

Furthermore, the control unit 77 ₁ shifts to a standby state based on the same procedure as that of the second embodiment described above according to the result of such comparison. In addition, about the process based on the procedure, the same number (6)-(9) as FIG. 4 is attached | subjected to FIG. 6, and description is abbreviate | omitted.
According to this embodiment, the radio base station 61 ₁ to 61 _4, the broadcast identification information in any order without being constrained to the order of their priority as long as correspondence between the priority is clear Can be sent as information. Therefore, the radio base station 61 ₁ to 61 ₄ is operated while flexibly adapting to an expansion and repair, etc. of the radio zone, and the mobile station 65 ₁ to 65 _N are radio zone in the same manner as in the second embodiment described above 62 ₁ microcell 63 in preference, be a further zone to listen to prioritize picocell 64 than its microcell 63.

In this embodiment, the columns of identification information (C ₁ , P ₁ , C ₃ , P ₃ , C ₄ , P ₄ ) once stored in the entry candidate careful selection register are once in ascending order (or descending order) of the priority order. However, the present invention is not limited to such a processing procedure. For example, the identification information having a high priority when shifting to the standby state with the priority remaining. A procedure that prioritizes may be adopted.

Further, in the present embodiment, as shown in FIG. 7, the radio base station 61 ₁ in accordance with the identification number C ₁ of the control channel assigned to the radio zone 62 _1, the priority P ₁ of the radio zone 62 ₁ Although transmitted as broadcast information, the present invention is not limited to such a configuration, and for the priority P ₁ , for example, in the mobile stations 65 _{1 to} 65 _N , other radio zones (microcell 63, picocell 64 are connected). In the case where the relative value with respect to the priority order is clearly identified, or when it is obvious that it is the highest order or the lowest order, the information may not be transmitted as notification information. Further, with such a configuration, an increase in the amount of information of the broadcast information is suppressed, and flexibility for system changes and the like is enhanced.

The operation of the fourth embodiment of the present invention will be described below with reference to FIGS. In the following, for simplicity, of the mobile station 65 ₁ to 65 _N, for the case where the mobile station 65 ₁ is located at a point as in the conventional example, illustrating the operation of each section.
In the radio base station 61 ₁ , the base station control device 69 ₁ determines that the local zone of the radio zone 62 ₁ formed by the own station does not have an overlap zone such as the micro cell 63 or the pico cell 64 described above. 15 is transmitted through the transmission / reception unit 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ .

However, on the contrary, when there is such an overlap zone, the base station controller 69 ₁ has the priority P ₁ and identification number C _{1 of} the control channel formed by itself as shown in FIG. In addition, a sequence of identification information (P ₁ , C ₁ , C ₃₎ indicating identification numbers C ₄ , C _{3 of} duplicate control channels that are assigned to these overlap zones and that constitute a permutation that is uncorrelated with the priority order. C ₄ , C ₃ ) are transmitted as broadcast information together with the aforementioned “standby permission level” and “standby deterioration level”. The priority P ₁ is assumed to be “0” for simplicity.

On the other hand, the mobile station 65 _1, the control unit 77 ₁ performs the conventional example Likewise measurement process and Iriken determination process, in the course of its Iriken determination processing, the target of measurement of the field intensity L ₂ Whether or not the format of the broadcast information received via the control channel is the same as that of the conventional example shown in FIG. 15 is determined based on the presence or absence of the above-described identification information column (FIG. 6 (1)). .
Furthermore, when the result of such determination is true, the control unit 77 ₁ shifts to a standby state by performing an entrance area determination process based on the same procedure as in the conventional example (FIG. 6 (2)). .

However, if the result is false, the control unit 77 ₁ determines the priority P ₁ from the sequence of identification information (P ₁ , C ₁ , C ₄ , C ₃ ) included in the broadcast information described above. identification number C ₁ and pre-reserved area on the extracted main memory (hereinafter, referred to as. "Iriken candidate carefully register") storing (FIG. 6 (3)). Further, the control unit 77 ₁ similarly measures the electric field strength L ₂ for each of the overlapping control channels indicated by the identification information C ₄ and C ₃ , and enters the priority and the identification number of the overlapping control channel. In addition to registering in the candidate carefully selected register, if any identification number is received as broadcast information in addition to the identification number, the same processing is performed for such identification number (however, for duplicate identification information) Are excluded from the target of the corresponding processing).

When the identification number and the priority order are stored for all the wireless zones that are candidates for the zone to be awaited in the entrance candidate careful selection register, the control unit 77 ₁ performs the same procedure as in the third embodiment described above. By performing the processing based on (FIG. 6 (a), (4) to (9)), it shifts to the standby state.
That is, the control unit 77 ₁ does not provide the priority order of all the microcells and picocells formed on each wireless zone as broadcast information in a lump, and the control unit 77 ₁ The control channel can be specified and a transition can be made to the standby state.

Therefore, according to the present embodiment, the transmission efficiency of the control channel is improved compared to the third embodiment described above, and it is possible to flexibly adapt to various forms of services.
In each of the above-described embodiments, the duplicate control channel and the control channel identification number are transmitted as broadcast information. However, the present invention is not limited to such a configuration. For example, instead of these identification numbers, the pico cell 64, When identification information (hereinafter referred to as “zone identification information”) of the microcell 63 and the wireless zone 62 ₁ is transmitted as broadcast information, the mobile stations 65 ₁ to 65 _1-
When 65 _N separately obtains a duplicate control channel or control channel corresponding to the zone identification information, it is possible to shift to the standby state in the same manner.

Further, in such a configuration, information indicating the duplicate control channel and control channel corresponding to the zone identification information may be registered as a table in an area reserved in the main memory of the control units 77 _{1 to} 77 _{N in} advance. well, on the basis of the instructions of the setting control of a radio channel to be performed so as to face the base station 61 ₁ to 61 ₄ (e.g., as broadcast information) may be provided separately.
FIG. 9 is an operation flowchart of the fifth embodiment of the present invention.

The operation of the fifth embodiment of the present invention will be described below with reference to FIG. 9 and FIG. In the following, for simplicity, of the mobile station 65 ₁ to 65 _N, for the case where the mobile station 65 ₁ is located at a point as in the conventional example, illustrating the operation of each section.
In the radio base station 61 ₁ , the base station controller 69 ₁ has the same format as the conventional example shown in FIG. 15 when there is no overlap zone in the local zone of the radio zone 62 ₁ formed by itself. The broadcast information is transmitted through the transmission / reception unit 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ .

However, on the contrary, if there is such an overlap zone, the base station controller 69 ₁ assigns the control channel identification number C ₁ assigned to the own station and these overlap zones individually. In addition to the identification numbers C ₃ and C _{4 of the} duplicated control channels, the overlapping order of the radio zones 62 ₁ , microcells 63 and picocells 64 to which these control channels and duplicate control channels are assigned is shown for each zone. The priorities P ₁ , P ₃ , P ₄ , the standby permission levels L _th1 , L _th3 , L _th4 and the standby degradation levels l _th1 , l _th3 , l _{th4 define} the communication link 71 ₁ and the transmission device 70 ₁ . Via a control station (not shown). For the sake of simplicity, the priorities described above are “0 (= P ₁ )”, “1 (= P ₃ )”, “2 (= P ₄ ) in the order of the wireless zone 62 ₁ , microcell 63, and picocell 64. ) ".

The base station control device 69 ₁ has the above-described priorities P ₁ , P ₃ , P ₄ , identification numbers C ₁ , C _{2 to} C ₄ , standby permission levels, L _th1 , L _th3 , L _th4 and standby degradation level l _th1. , L _th3 , l _th4, and shaded in FIG. 10, these are converted into a sequence of information ((P ₁ , C ₁ , L _th1 , l _th1 ), ... (P ₄
, C ₄ , L _th4 , l _th4 )) are transmitted as broadcast information.

On the other hand, the mobile station 65 _1, the control unit 77 ₁ performs the conventional example Likewise measurement process and Iriken determination process, in the course of its Iriken determination processing, the target of measurement of the field intensity L ₂ Whether or not the format of the broadcast information received via the control channel is the same as that of the conventional example shown in FIG. 15 is determined based on the presence or absence of the above-described information column (FIG. 9 (1)).
Furthermore, when the result of such determination is true, the control unit 77 ₁ shifts to a standby state by performing an entrance area determination process based on the same procedure as in the conventional example (FIG. 9 (2)). .

On the other hand, if the result is false, the control unit 77 ₁ determines the sequence of information ((P ₁ , C ₁ , L _th1 , l _th1 ),... (P _{4 ,.} C ₄ , L _th4 , l _th4 )) are stored in an area reserved in the main memory in advance (hereinafter referred to as “entrance area candidate selection register”) (FIG. 9A). Further, the control unit 77 ₁ sorts the combinations of the priority order, the identification number, the standby permission level and the standby deterioration level stored in the entrance candidate selection register in this way in ascending order of the priority order, and all the priorities. By deleting the rank (FIG. 9 (a)), the combination information of the identification information, the standby permission level and the standby deterioration level is left on the entrance candidate selection register. In the following, such a combination column is simply referred to as a “column” for simplicity.

The control unit 77 ₁ sequentially refers to the individual identification numbers C ₄ , C ₃ , C ₁ and the standby permission levels L _th4 , L _th3 , L _th1 arranged in the ascending order of priority in the column. Then, the electric field strength L ₃ is measured for the overlapping control channel and the control channel individually indicated by these identification numbers (FIG. 9 (4)), and the magnitude relationship with the standby permission level L _th corresponding to the channel is sequentially determined. (Fig. 9 (5)).

Further, the control unit 77 ₁ shifts to a standby state based on the same procedure as that of the above-described third embodiment based on the result of such determination. The processing based on the procedure is illustrated in FIG. The same numbers (6) to (9) as those in FIG.
As described above, according to the present embodiment, the mobile stations 65 _{1 to} 65 _N preferentially select the radio zone having a high priority as a zone that the local station should wait on, and the electric field strength that is a criterion for whether or not to wait for the mobile station. Is set dynamically (or statically) under the initiative of the radio base station for each radio zone.

Therefore, in accordance with the optimization of the geographical distribution and the number of mobile stations that shift to the standby state in the wireless zones 62 ₁ and 62 ₂ , the microcell 63, and the picocell 64, it is possible to flexibly set the stacking relationship of individual wireless zones. It becomes possible. Also, the mobile stations 65 _{1 to} 65 _N give priority to the microcell 63 over the radio zone 62 ₁ and give priority to the picocell 64 over the microcell in the same manner as in the second to fourth embodiments described above. Can be a candidate for standby.

In the present embodiment, a sequence of information ((P ₁ , C ₁ , L _th1 , l _th1 ),... (P ₄ , C ₄ , L _th4 , l _th4 )) stored in the entrance candidate careful selection register is stored. Only the identification number, the standby permission level, and the standby degradation level remain after sorting in ascending order (or descending order) of priority, but the present invention is not limited to such a configuration. A procedure may be adopted in which an identification number having a higher priority is prioritized when shifting to a standby state without erasing.

FIG. 11 is an operation flowchart of the sixth embodiment of the present invention.
The operation of the sixth embodiment of the present invention will be described below with reference to FIG. 11 and FIG.
In the radio base station 61 ₁ , the base station controller 69 ₁ has the same format as the conventional example shown in FIG. 15 when there is no overlap zone in the local zone of the radio zone 62 ₁ formed by itself. The broadcast information is transmitted through the transmission / reception unit 68 ₁ , the antenna duplexer 67 _1, and the antenna 66 ₁ .

However, on the contrary, if there is any overlap zone, the base station controller 69 ₁ includes the identification number C ₁ of the control channel formed by itself and the overlapping control channels assigned to these overlap zones. In addition to the identification numbers C ₃ and C ₄ , for the wireless zone 62 ₁ , microcell 63 and picocell 64 to which these control channels and duplicate control channels are assigned, priority P ₁ indicating the stacking relationship for each zone, P ₃ , P ₄ , correction values Δ ₁ , Δ ₃ , Δ ₄ indicating standby permission levels relative to a predetermined standard value L ₀ , and standby deterioration levels l _th1 , l _th3 , l _th4 , Communication link 71 ₁ and transmission device 70 ₁
From a control station (not shown). For the sake of simplicity, the priorities described above are “0 (= P ₁ )”, “1 (= P ₃ )”, “2 (= P ₄ ) in the order of the wireless zone 62 ₁ , microcell 63, and picocell 64. ) ".

The base station controller 69 ₁ has the identification numbers C ₁ , C _{2 to} C ₄ , priority P ₁ , P ₃ , P _{4 described above.}
, Correction values Δ ₁ , Δ ₃ , Δ ₄ and standby deterioration levels l _th1 , l _th3 , l _th4 are taken in, and these are wirelessly transmitted in a predetermined format as shown by shading in FIG. A sequence of information ((P ₁ , C ₁ , Δ ₁ , l _th1 ),... (P ₄ , C ₄ , Δ ₄ , l _th4 )) associated with the zone unit is transmitted as broadcast information.

On the other hand, in the mobile station 65 ₁ , the control unit 77 ₁ performs the measurement process and the entrance area determination process in the same manner as the fifth embodiment described above, and the format of the broadcast information is in the process of the entrance area determination process. Whether or not it is the same as the conventional example shown in FIG. 15 is determined on the basis of the presence / absence of the information column described above (FIG. 11 (1)), and if the determination result is true, By performing the entrance area determination process based on the same procedure, a transition is made to the standby state (FIG. 11 (2)).

On the other hand, if the result is false, the control unit 77 ₁ determines the sequence of information ((P ₁ , C ₁ , Δ ₁ , l _th1 ),... (P _{4 ,.} C ₄ , Δ ₄ , l _th4 )) is stored in an area reserved in the main memory in advance (hereinafter referred to as “entrance area candidate selection register”). Further, the control unit 77 ₁ sorts the combinations of the priority order, the identification number, the correction value, and the standby deterioration level stored in the entrance candidate selection register in this way in ascending order of the priority order, and all the priority orders. Is stored in the entry candidate careful selection register (FIG. 11 (A)). In the following, such a combination column is simply referred to as a “column” for simplicity.

Further, the control unit 77 ₁ sequentially refers to the individual identification numbers C ₄ , C ₃ , C ₁ and correction values Δ ₄ , Δ ₃ , Δ ₁ arranged in the column in ascending order of priority. The field strength L ₃ is measured for the duplicate control channel and control channel corresponding to the identification number individually indicated by the identification number (FIG. 11 (4)), and the correction value Δ corresponding to the channel and the standard value L ₀ described above are measured. The magnitude relationship with the sum is sequentially determined (FIG. 11 (5)).

Further, the control unit 77 ₁ shifts to a standby state based on the same procedure as that of the third embodiment described above based on the result of such determination, and the processing based on the procedure is illustrated in FIG. The same numbers (6) to (9) as in FIG.
As described above, according to the present embodiment, a correction value that takes a value smaller than the standby permission level is included in the broadcast information instead of the standby permission level, and the mobile stations 65 _{1 to} 65 _N have higher priority in the wireless zone. Priority can be selected as a standby candidate.

Therefore, the transmission efficiency of the control channel is maintained high, and the geography of the mobile station that shifts to the standby state in the radio zones 62 ₁ , 62 ₂ , microcell 63, and picocell 64 in the same manner as the fifth embodiment described above. It is possible to optimize the general distribution and number, and to dynamically set the stacking relationship related to each wireless zone. In addition, the mobile stations 65 _{1 to} 65 _N can prioritize the microcell 63 and the picocell 64 over the wireless zone 62 ₁ as candidates for standby.

In the present embodiment, a sequence of information ((P ₁ , C ₁ , Δ ₁ , l _th1 ),... (P ₄ , C ₄ , Δ ₄ , l _th4 )) stored in the entry candidate careful selection register After sorting in ascending order (or descending order) of priority, only the identification information, the correction value, and the standby deterioration level remain, but the present invention is not limited to such a configuration. A procedure may be adopted in which an identification number having a higher priority is given priority when shifting to a standby state without deleting the order.

  Further, in this embodiment, the correction value corresponding to all the microcells and picocells formed on the radio zone in addition to all the radio zones adjacent to the radio zone formed by the radio base station. However, the present invention is not limited to such a configuration. For example, only the radio zone in which each radio base station constituting these radio zones, microcells, and picocells is formed by the own station. The same determination process (FIG. 11 (5)) is performed by transmitting the correction value related to the above as broadcast information, and the mobile station individually acquiring the correction value from all the control channels to be measured for the electric field strength. You can also.

Furthermore, in the embodiments corresponding to the tenth to twelfth technologies related to the present invention, no processing related to the standby deterioration level is described, but for such a standby deterioration level, for example, the mobile station When shifting to the standby state, it can be applied as a criterion for determination processing to be performed in the same manner as the conventional example in order to escape from the standby state.
In such a case, the standby degradation level state other than the control channel (or the duplicate control channel) that the mobile station has actually shifted to the standby state prior to the determination process described above is deleted from the entrance candidate selection register. It is also possible.

  Further, in each of the above-described embodiments, the magnitude relationship between the electric field strength and the standby permission level is in ascending order of priority for the control channels individually indicated by the identification numbers registered in the entry candidate register or the entry candidate careful selection register. The control channel (or duplicate control channel) in which the former exceeds the latter is discriminated, but the present invention is not limited to such a configuration. For example, all of the same identification numbers that are registered are used. For such control channels, it is also possible to apply a procedure for performing such discrimination in a batch in ascending order of priority after measuring the electric field strength regardless of the priority.

FIG. 13 is an operation flowchart of the seventh embodiment of the present invention.
The operation of the seventh embodiment of the present invention will be described below with reference to FIGS.
The feature of this embodiment lies in the procedure of the measurement process, and the entrance area determination process and other processes are the same as the processes in the second to sixth embodiments described above, so the description thereof is omitted here. To do.

In addition, among the processes shown in FIG. 13, the same processes as those shown in FIG. 16 are given the same reference numerals and explanation thereof is omitted here. In the mobile station 65 ₁ , when the power is turned on, the control unit 77 ₁ controls the transmission / reception unit 74 ₁ in advance to control the electric field strength L ₁ of the control channel registered in the control channel table described above. sequentially measured (FIG. 13 (1)), to determine the magnitude relation between the predetermined threshold value L _th and the electric field strength (FIG. 13 (2)).

When the electric field strength greater than the threshold value L _th is obtained in the process of such determination, the control unit 77 ₁ associates the electric field strength with the control channel and stores them in the entry candidate register (FIG. 13 ( 3)).
Furthermore, the control unit 77 ₁ starts the entrance area determination process without measuring any electric field strength for other control channels registered in the control channel table.

  In the process of the process activated when the format of the broadcast information received via the control channel is different from that in the conventional example in such an entrance area determination process, the broadcast information is included in the broadcast information as an ascending order of priority or priority. For the control channels individually corresponding to all the identification information included corresponding to the ranks, the magnitude relationship between the field strength and the standby permission level is determined in a predetermined order together with the determination of the field strength.

As described above, according to the present embodiment, since the time required for the mobile stations 65 _{1 to} 65 _N to shift to the standby state at the time of start-up is shortened, the service is quickly performed after the battery is replaced or the power is turned on. Provided.
Hereinafter, the operation of the eighth embodiment of the present invention will be described with reference to FIGS. 4, 6, 9, 11, 13 and 14.

The difference between this embodiment and the second to seventh embodiments described above lies in the procedure of the measurement process and the entrance area determination process.
In the course of the measurement processing, when the control unit 77 ₁ stores the electric field strength and the control channel in association with each other in the entrance candidate register, the control field 77 ₁ also stores the electric field strength measured in advance for the control channel. The target of.

Further, the control unit 77 ₁ measures the electric field strengths L ₂ and L ₃ (FIG. 16 (7), FIG. 4 (4), FIG. 6 (4), FIG. 9 (4), FIG. 11 (4)). Sometimes, it is determined whether or not the control channel to be measured is stored in the above-mentioned entry candidate register, and if the determination result is true, such measurement is omitted and Similarly, regarding the control channel, the electric field strength stored in the entrance candidate register is regarded as the electric field strength L ₂ and the electric field strength L _3, and the processing is continued.

As described above, according to the present embodiment, the total number of control channels for which the mobile station should measure the electric field strength prior to the transition to the standby state is reduced, so that the operation efficiency of the mobile station is improved and the service quality is improved. Will improve.
In each of the above-described embodiments, as shown in FIGS. 4, 5, 8, and 10, the electric field is applied to the control channels (radio zones) corresponding to all the identification numbers stored in the entrance candidate selection register. It is determined whether or not the strength exceeds the standby permission level. However, the present invention is not limited to such a processing procedure. For example, as shown by a one-dot chain line in these drawings, any control channel is selected. When the electric field strength of (wireless zone) exceeds the standby permission level, it is possible to promptly receive a communication service by shifting to the standby state in the corresponding control channel or wireless zone.

  Further, in each of the above-described embodiments, no identification information is transmitted for the adjacent zones formed to overlap each other around the radio zone formed by each radio base station, but the present invention has such a configuration. For example, if the relative priority with respect to the radio zone formed by the local station is reliably identified in the mobile station, the identification information may be transmitted for these adjacent zones.

  Furthermore, in each of the above-described embodiments, various information is included in the broadcast information as a permutation corresponding to the ascending order of priority. However, the present invention is not limited to such a form of broadcast information, and the mobile station If the correspondence with these priorities can be reliably identified, for example, the permutation corresponding to the descending order of the priorities or the notification information generated by the formation corresponding to the priorities in a predetermined order is applied. May be.

  Moreover, in each embodiment mentioned above, although the channel number of the radio channel for control (it uses for transmission of alerting | reporting information) allocated to each radio | wireless zone (radio base station) is included in alerting | reporting information, The present invention is not limited to such channel numbers. For example, each radio channel is not configured in a time division manner as in the TDMA scheme, and occupies a single radio frequency like a radio channel in an analog mobile communication system. In this case, the radio frequency may be applied instead of the channel number.

  Furthermore, in each of the embodiments described above, broadcast information is digitally transmitted by utilizing a spare field that is not reserved under a predetermined frame format. However, the present invention is limited to such a configuration. If the size of the spare field is not sufficiently large, for example, it may be transmitted as a multi-frame, for example, as a plurality of frames transmitted individually or divided if the mobile station can reliably receive the frame. May be transmitted.

  In each of the above-described embodiments, the broadcast information is transmitted via a control radio channel, but the present invention is not limited to the radio channel setting control method performed via such a radio channel, The present invention can be applied regardless of the wireless channel setting control method and the wireless transmission method.

It is a principle block diagram of the 1st technique relevant to this invention. It is a principle block diagram of the 2nd thru | or 15th technique relevant to this invention. It is a principle block diagram of the 16th technique relevant to this invention. It is an operation | movement flowchart of 2nd and 8th embodiment of this invention. It is a figure which shows the alerting | reporting information in 2nd embodiment of this invention. It is an operation | movement flowchart of 3rd and 4th embodiment of this invention. It is a figure which shows the alerting | reporting information in 3rd embodiment of this invention. It is a figure which shows the alerting | reporting information in 4th embodiment of this invention. It is an operation | movement flowchart of 5th embodiment of this invention. It is a figure which shows the alerting | reporting information in 5th embodiment of this invention. It is an operation | movement flowchart of 6th embodiment of this invention. It is a figure which shows the alerting | reporting information in 6th embodiment of this invention. It is an operation | movement flowchart of 7th embodiment of this invention. It is a figure which shows the structural example of the conventional mobile communication system. It is a figure which shows the structure of the alerting | reporting information in a prior art example. It is an operation | movement flowchart of a prior art example. It is a figure explaining the subject of a prior art example.

Explanation of symbols

1, 11, 61 Radio base station 2, 12, 65 Mobile station 3 Traffic control means 4, 13, 13a-13g Notification means 5, 14, 14a-14g Notification information reception means 6, 16, 16a-16g Standby control means 15 , 15a to 15g Measuring means 17 Entrance determination means 62 Wireless zone 63 Microcell 64 Picocell 66, 72 Antenna 67, 73 Antenna duplexer 68, 74 Transmitter / receiver 69 Base station controller 70 Transmitter 71 Communication link 75 Microphone 76 Speaker 77 Control unit 78 Display operation unit

Claims (3)

In a mobile communication system having a plurality of radio base stations that constitute overlapping radio zones by a hierarchical cell structure,
The radio base station
A notification means for transmitting notification information including a stacking order and identification information of the wireless zone and a standby permission level of the wireless zone;
The mobile station
Receiving means for receiving the broadcast information;
Measuring means for measuring the electric field strength of the radio zone corresponding to the identification information included in the received notification information;
The measured electric field strength is compared with the standby permission level, and the wireless zone to which the lowest stacking order is assigned is determined as the standby zone among the wireless zones in which the measured electric field strength is greater than the standby permission level. A mobile communication system comprising: a standby control unit. In a radio base station in a mobile communication system having a plurality of radio base stations that configure overlapping radio zones by a hierarchical cell structure,
A radio base station comprising: identification information of the radio zone; level information about standby of the radio zone; and notification means for transmitting notification information including a correction value that takes a value smaller than the level information about the standby. . In a mobile station in a mobile communication system having a plurality of radio base stations constituting radio zones that overlap with each other by a hierarchical cell structure,
From the radio base station
Receiving means for receiving notification information including identification information of the wireless zone, level information regarding standby of the wireless zone, and a correction value that takes a value smaller than the level information regarding the standby;
Measuring means for measuring the electric field strength of the radio zone corresponding to the identification information included in the received notification information;
A mobile station comprising standby control means for determining a standby zone candidate based on the measured electric field strength, level information regarding standby included in the broadcast information, and a correction value.

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