JP2011250065A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system capable of selecting a wireless communication system with good wireless quality by a simple process depending on the position of a mobile station apparatus to establish connection, and improving the convenience.SOLUTION: In a mobile communication system, a mobile station apparatus 2 measures wireless quality data of a wireless communication system that uses a carrier frequency with a good carrier level, transmits position information, a wireless system name, and wireless quality data to a controller 1 with associating with each other, adds position information periodically to request information of connection destination candidates from the controller, and decides the system of a connection destination based on the received connection destination candidates. The controller 1 stores the received information as position environment information data with associating with a plurality of areas that are preliminarily set based on the position information, refers to the position environment information data of the area corresponding to the position information being requested in response to the request from the mobile station apparatus 2 to extract a plurality of systems with good wireless quality, and transmits the extracted systems as information of the connection destination candidates to the mobile station apparatus together with the wireless quality data.

Description

  The present invention relates to a mobile communication system, and more particularly, to a mobile communication system that can reduce cell movement processing and handover processing during communication in a mobile station apparatus and improve user convenience.

[Description of Prior Art]
As mobile communication becomes widespread, mobile station apparatuses that can be connected to a plurality of wireless communication systems are used. Such mobile station apparatus, for example, or if a plurality of cellular systems in the same area is the service, the third-generation mobile phones: services such as (3 ^rd Generation Partnership Project 3GPP) and WLAN (Wireless LAN) duplicates This can be used when

  The user can select an appropriate radio communication system from a plurality of radio communication systems according to the application, and the standard for selection is communication such as bandwidth, transmission rate, mobility, etc. that characterizes each radio communication system. There are things related to the system and those related to the service such as fee and service area.

  In such a case, on the assumption that a plurality of applications are used, there is a demand for a user to adaptively switch and use a wireless communication system suitable for the application used on the spot. However, in the case of mobile communication, the surrounding wireless environment changes every moment, and the communication method that you want to select may not always be available, so one system should be fixedly selected according to the application. Is very difficult.

In recent years, software radio terminals have attracted attention as mobile station apparatuses that can be connected to a plurality of radio communication systems.
The software defined radio terminal realizes a plurality of communication methods and applications on a single hardware by realizing all of the radio unit / baseband processing unit and protocol processing unit for performing call connection with software. Is.
A plurality of communication methods and applications are switched by switching software. That is, the user can switch and receive services of a plurality of wireless systems by one wireless terminal.

On the other hand, in a software defined radio terminal having call connection means with a plurality of radio communication systems, when the user switches the radio link connection means depending on its use, the place to use is the service area of the desired mobile communication system It is necessary to know whether or not.
That is, the user first attempts to capture the broadcast information transmitted from the base station of the set system by setting the software radio terminal to the mode of the desired radio communication system. Can be used there.

However, it is unclear at that time whether the system that can be acquired provides the optimum environment for the service to be received and the application to be used at the location where the terminal exists.
Even if call connection and communication can be started by an optimal system at that time, the terminal does not always move to provide an optimal environment even after the movement. .

  In addition, it is possible to capture all the available systems in order and notify the user of a wireless communication system that can be used at present, so that an optimal system can be selected each time. Each time a radio communication system is captured, in order to realize the call connection means, it is necessary to make various settings of hardware and software in accordance with the corresponding software switching. Everything must be done for the wireless communication system, which is very time consuming.

[Related technologies]
In addition, as a technique regarding a radio communication system, there is JP-A 2003-259457 “Multi-service radio communication system” (Applicant: Hitachi Kokusai Electric Co., Ltd., Patent Document 1).
In Patent Document 1, a multi-service terminal that can be connected to a plurality of wireless systems detects the position of the local station and transmits it to an external management server, and the management server transmits information on available wireless systems. It is described that the terminal selects an optimum wireless system from a plurality of terminals.
However, in Patent Literature 1, the wireless quality of a wireless system that can be captured by a terminal is measured and transmitted to the management server together with the positional information, or the management server transmits the positional information transmitted from a plurality of terminals and the wireless system. It is not described that the data is tabulated for each area based on the wireless quality.

JP 2003-259457 A

However, the conventional mobile communication system using a software defined radio has a problem in that it takes a long time to select an optimal wireless communication system according to the movement of the mobile station apparatus, and it takes time.
Further, the conventional mobile communication system has a problem that it is difficult to select a wireless communication system in accordance with a user's unique request.

  The present invention has been made in view of the above-described circumstances, and selects and connects an optimal wireless communication system that has good wireless quality and meets user requirements according to the position of the mobile station device by simple processing. An object of the present invention is to provide a mobile communication system that can improve convenience.

  The present invention for solving the problems of the conventional example includes a plurality of mobile station apparatuses connectable to a plurality of radio communication systems, and a control apparatus that communicates with a plurality of mobile station apparatuses via the plurality of radio communication systems. A position information measuring unit in which a mobile station apparatus acquires position information based on a received signal, and a carrier frequency used in a radio communication system is good. For the carrier frequency, a sensing processing unit that measures radio quality data of a radio communication system that uses each carrier frequency, and the surrounding environment information by associating the position information, the carrier frequency, the radio quality data of the radio communication system, and the system name The location environment information is transmitted to the control device as data and periodically attached with location information to request information on connection destination candidates from the control device. An environment information processing unit that transmits a data acquisition request; and a connection system determination unit that determines a connection destination wireless communication system based on connection destination candidate information. When data is received, the carrier frequency included in the surrounding environment information data, the wireless quality data of the wireless communication system, and the system name are associated with a plurality of preset areas based on the location information included in the surrounding environment information data. When the location environment information data acquisition request is received from the mobile station device, the radio environment data is good with reference to the location environment information data of the area corresponding to the location information included in the request. Multiple wireless communication systems are extracted, and the system names of the extracted wireless communication systems and the corresponding carrier frequencies and It is characterized by comprising a control unit to be transmitted to the mobile station apparatus and a quality data as the information of the connection destination candidate.

  According to the present invention, there is provided a mobile communication system including a plurality of mobile station apparatuses connectable to a plurality of radio communication systems, and a control apparatus that communicates with the plurality of mobile station apparatuses via the plurality of radio communication systems. The mobile station apparatus obtains position information based on the received signal, and a carrier frequency with a good reception carrier level among carrier frequencies used in the wireless communication system, A sensing processing unit that measures wireless quality data of a wireless communication system to be used, and transmits position information, a carrier frequency, wireless quality data of the wireless communication system, and a system name in association with each other and transmitted to the control device as surrounding environment information data An environment for periodically sending location environment information data acquisition requests for requesting connection destination candidate information to the control device. An information processing unit, and a connection system determination unit that determines a connection destination wireless communication system based on connection destination candidate information. When the control device receives the surrounding environment information data from a plurality of mobile station devices, Based on the position information included in the information data, the carrier frequency included in the surrounding environment information data, the wireless quality data of the wireless communication system, and the system name are stored in association with a plurality of preset areas as position environment information data. When a location environment information data acquisition request is received from the mobile station device, a plurality of radio communication systems with good radio quality data are extracted by referring to the location environment information data of the area corresponding to the location information included in the request. The system name of the extracted wireless communication system and the corresponding carrier frequency and wireless quality data are Since the mobile communication system is equipped with a control unit that transmits information to the mobile station device as a report, the control device grasps the latest radio quality information for each radio communication system in each area, and operates and maintains the entire system. In addition, since the mobile station apparatus is provided from the control apparatus by narrowing down the connection destination candidates according to the current position, if the conditions set by the user are further combined, with a simple process, It is possible to select and connect an optimal radio communication system that has good radio quality and meets the user's requirements, and it is possible to reduce cell movement and handover processing and improve convenience.

1 is a schematic explanatory diagram showing a schematic configuration of a mobile communication system (this system) according to an embodiment of the present invention. 1 is a configuration block diagram of a control device 1 according to an embodiment of the present invention. 3 is a configuration block diagram of a mobile station device 2. FIG. It is explanatory drawing which shows the outline | summary of surrounding environment information data. It is explanatory drawing of the radio | wireless quality data shown in FIG. It is a schematic explanatory drawing of a position environment information database. It is explanatory drawing of the radio | wireless quality data of each radio | wireless communications system in the position environment information database shown in FIG. It is a flowchart which shows the process of the mobile station apparatus 2 immediately after power activation. It is a flowchart which shows the process of the mobile station apparatus 2 in idle mode. It is a flowchart which shows the surrounding environment sensing process shown to the process 202 of FIG. It is a flowchart which shows the process in the communication mode of the mobile station apparatus 2 of this system. 4 is a flowchart showing position environment information data tabulation processing in a control unit 11 of the control device 1. 4 is a flowchart showing position environment information data distribution processing in the control unit 11 of the control device 1.

[Outline of the embodiment]
Embodiments of the present invention will be described with reference to the drawings.
The mobile communication system according to the embodiment of the present invention includes a control device that manages a plurality of wireless communication systems, and the mobile station device periodically sets the carrier level around its own station for all available carrier frequencies. Measure and extract the wireless communication system using a carrier frequency with a good carrier level, measure the wireless quality, attach the location information of its own station, and send it to the control device as surrounding environment information data. However, the surrounding environment information data received from a plurality of mobile station devices is aggregated, the wireless quality of each wireless communication system is averaged for each predetermined area, and stored as location environment information data. When an inquiry with position information is received, position environment information data of the area including the position is referred to, and a wireless communication system with good wireless quality in the area A predetermined number is listed, and the location environment information data is transmitted to the mobile station device, and the mobile station device is optimal according to the conditions arbitrarily set by the user from the received multiple location environment information data. A suitable wireless communication system is selected and connected to the wireless communication system, and an appropriate connection destination system is selected from the connection destination candidates extracted by the control device according to the user's request through simple processing. In addition, the handover process can be simplified.

  Also, in this mobile communication system, the mobile station device measures the radio quality for each cell of the radio communication system for the carrier frequency with a good carrier level, attaches its own location information, and controls it as surrounding environment information data The peripheral environment information data transmitted to the device and received by the control device from the plurality of mobile station devices are classified for each predetermined area based on the location information, and the peripheral environment information for each cell of each wireless communication system is averaged. Then, when a query with location information is received from the mobile station device, the location environment information data of the area including the location is referred to, and a cell with good radio quality is found in the area. A predetermined number is listed, and the location environment information data is transmitted to the mobile station device, and the mobile station device receives a plurality of received location environment information data. The optimal wireless communication system is selected according to the conditions arbitrarily set by the user and connected to the wireless communication system, and the user requests from the connection destination candidates extracted by the control device. Accordingly, an appropriate connection destination system can be selected by a simple process, and the handover process can be simplified.

  In addition, the mobile communication system sets a selection condition such as a charge and a transmission speed as a condition for listing the wireless communication system in advance in the control apparatus, and the control apparatus makes an inquiry from the mobile station apparatus. When receiving, list a plurality of wireless communication systems such as in ascending order of charge according to the selection condition, in order of increasing transmission speed, and name of wireless communication systems that are candidates for the listed connection destinations. The data is transmitted to the mobile station device, and the mobile station device can select from the list or display the list so that the user can select it.

  Further, the mobile communication system transmits a query with a selection condition when transmitting an inquiry from the mobile station apparatus to the control apparatus, and the control apparatus lists up in order from the upper radio communication system based on the selection condition. The wireless communication system name that is a candidate for the listed connection destination is transmitted to the mobile station apparatus, and the mobile station apparatus selects from the list, or the list is displayed on the mobile station apparatus and selected by the user. It is possible.

[Configuration of Mobile Communication System According to Embodiment: FIG. 1]
FIG. 1 is a schematic explanatory diagram showing a schematic configuration of a mobile communication system (present system) according to an embodiment of the present invention.
As shown in FIG. 1, this system includes a control device 1 that manages positional environment information in a plurality of communication systems (1), (2), and (3), and a plurality of communication systems (1), (2), The mobile station device 2 is connectable to (3). Although only one mobile station device 2 is shown here for the sake of simplicity, there are actually a plurality of mobile station devices 2.

The control device 1 is a characteristic part of this system, and provides the mobile station device 2 with information on a wireless communication system that is a candidate for the mobile station device 2 to select an optimal wireless communication system.
Specifically, the control device 1 associates with each preset area based on the information transmitted from the mobile station device 2, and performs wireless such as carrier level and propagation loss for each cell of each wireless communication system. Quality information is aggregated and stored as position environment information data. When there is an inquiry from the mobile station apparatus 2 with the position data of the mobile station apparatus 2, position environment information data of the area including the position is received. , And a list of wireless communication systems with good communication conditions is listed and notified to the mobile station apparatus 2.
Here, the “area” indicates a specific area on the map regardless of the wireless communication system, and corresponds to a specific range of position coordinates. The size and shape of the area can be arbitrarily set.
The processing of the control device 1 will be described in detail later.

  The mobile station device 2 is a mobile terminal configured by a software radio, and is carried by a user. By changing software and changing parameter settings, the mobile station device 2 is configured to have a radio communication system (1), a radio communication system ( 2) It can be connected to the wireless communication system (3). Specifically, the mobile station apparatus 2 performs wireless communication with base stations (or parent stations) 41, 42, 43,... Of each communication system. Moreover, it communicates with the control apparatus 1 via a radio | wireless communications system.

As a feature of this system, the mobile station device 2 performs a process of measuring the radio quality of the location information where the mobile station is located and the cell of the radio communication system that can be captured at the location and informing the control device 1 of the radio quality. Do.
In addition, the control apparatus 1 is periodically inquired about an optimal wireless communication system candidate as a connection destination, and based on the connection destination candidate information from the control apparatus 1, an appropriate wireless meeting the user's request is obtained. Select a communication system and connect.
The processing of the mobile station device 2 will be described in detail later.

  Also, in this system, when the base station 41, 42, 43,... Of each radio communication system receives a transmission signal from the mobile station apparatus 2 to the control apparatus 1, it measures the radio quality in the uplink and controls the control apparatus. 1 is notified.

[Configuration of Control Device 1: FIG. 2]
Next, the configuration of the control device 1 will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the control device 1 according to the embodiment of the present invention.
As shown in FIG. 1, the control device 1 of this system is configured by a computer and basically includes a control unit 11, a storage unit 12, and an interface unit 13.
The control unit 11 is a processing device composed of a CPU or the like, and reads and activates a program stored in the storage unit 12 to totalize data related to wireless quality received from the mobile station device 2 and Processing such as creating information data and providing location environment information data in response to an inquiry is performed.

  In the present embodiment, data related to radio quality measured by the mobile station device 2 and transmitted to the control device 1 is referred to as “peripheral environment information data”. Data collected and stored is referred to as “positional environment information data”.

The storage unit 12 stores a processing program in the control unit 11, and includes a location environment information database 14 that stores location environment information data obtained by collecting the surrounding environment information data from the mobile station device 2. The position environment information database 14 will be described later.
The interface unit 13 is connected to each communication system (1), (2), (3),... And communicates with base stations (parent stations) 41, 42, 43. To communicate with the mobile station apparatus 2.

[Configuration of Mobile Station Device 2: FIG. 3]
Next, the configuration of mobile station apparatus 2 will be described using FIG. FIG. 3 is a configuration block diagram of the mobile station apparatus 2.
As shown in FIG. 3, the mobile station device 3 includes a GPS signal receiving unit 21, an LCS (LoCation Service) measuring unit 22, a radio unit 23, a carrier level measuring unit 24, and a baseband modem unit. 25, a radio quality measurement unit 26, a broadcast information acquisition unit 27, a location environment information processing unit 29, a connection system determination unit 30, an application data transmission / reception unit 31, and a main control unit 32.

Each component will be described.
The GPS signal receiving unit 21 performs reception processing of a signal in the GPS radio frequency band and converts it into a baseband band.
The LCS measurement unit 22 acquires position information of the mobile station device 2 from the received GPS signal. LSC is a position information acquisition method proposed by 3GPP.
The position information measuring unit in the claims has the functions of the GPS signal receiving unit 21 and the LCS measuring unit 22.

  The radio unit 23 performs transmission / reception processing of signals communicated between the base station apparatus and the mobile station apparatus 2 of each radio communication system, and performs band conversion between a radio frequency band signal and a baseband signal. It is. In particular, in the present system, the radio unit 23 is used for measurement of radio quality for each carrier frequency and transmission / reception of ambient environment information data or position environment information data with the control device 1.

The carrier level measurement unit 24 measures the reception level for each carrier frequency over the entire frequency band set in the radio unit 23 in accordance with an instruction from the surrounding environment sensing control unit 28 described later. That is, the reception level of the downlink signal from the base station or the master station is measured.
The baseband modulation / demodulation unit 25 performs baseband demodulation processing on the baseband signal from the radio unit 23 in accordance with an instruction from the surrounding environment sensing control unit 28, and transmits surrounding environment information data to the control device 1. Baseband modulation processing is performed and output to the radio unit 23.

  The radio quality measurement unit 26 measures the radio quality of the signal baseband demodulated by the baseband modulation / demodulation unit 25 in accordance with an instruction from the surrounding environment sensing control unit 28. As radio quality, timing, propagation loss, SIR (Signal-to-Interference Ratio), BLER (BLock Error Rate), etc. can be considered. The radio quality measurement unit 26 measures the radio quality for each cell (for each peripheral station in the radio communication system) in the current location of the mobile station device 2 and its periphery.

  The broadcast information acquisition unit 27 is a part that acquires broadcast information of each wireless communication system from the data demodulated by the baseband modulation / demodulation unit 25. Specifically, information on each wireless quality included in the position environment information data transmitted from the control device 1, system parameters, and the like are included.

The surrounding environment sensing control unit 28 controls the radio unit 23, the carrier level measurement unit 24, the baseband modulation / demodulation unit 25, the radio quality measurement unit 26, and the broadcast information acquisition unit 27, periodically at the current location of the mobile station device 2. Performs ambient environment sensing processing to detect the wireless environment.
Also, information such as system parameters broadcast on broadcast information of each wireless communication system is detected.
The sensing processing unit described in the claims includes the functions of a radio unit 23, a carrier level measurement unit 24, a baseband modulation / demodulation unit 25, a radio quality measurement unit 26, a broadcast information acquisition unit 27, and a surrounding environment sensing control unit 28. It is a thing.

The environment information processing unit 29 generates and stores as a surrounding environment information data the association of the wireless quality including the detected carrier level and the acquired position information, and reports the surrounding environment information data from the control device 1. Is transmitted to the control device 1 via the baseband modulation / demodulation unit 25 and the radio unit 23.
In addition, the environment information processing unit 29 creates position environment information data acquisition request control data for inquiring position environment information data corresponding to the current location of the mobile station device 2 and transmits the control data to the control device 1.

The connection system determination unit 30 determines a system to be connected using the location environment information data corresponding to the current location of the mobile station device 2 transmitted from the control device 1 in response to the inquiry, or selects a candidate for the system to be connected. Determine and notify the main control unit 32.
The connection system determination unit 30 stores in advance a condition for selecting a wireless communication system to be connected from among a plurality of candidates under what criteria. Conditions can be arbitrarily set by the user.

  When the connection system determination unit 30 determines and notifies the connection system, one wireless communication system most suitable for the condition is selected, and the name of the wireless communication system is notified to the main control unit 32. In addition, when notifying the candidate of the connection system, a plurality of good ones are extracted in consideration of the conditions, notified to the main control unit 32, displayed on the display unit, and selected by the user. .

The application data transmission / reception unit 31 performs transmission / reception processing of data (user data) associated with a communication application executed by the mobile station apparatus 2.
The main control unit 32 performs call processing and the like as the mobile station device 2 while performing overall control of the above-described components.

[Outline of operation of this system: Figs. 1, 2, 3]
Next, an outline of the operation of this system will be described with reference to FIGS.
The mobile station apparatus 2 periodically measures the position information of the own station, periodically measures the carrier level of the carrier frequency that can be used, measures the radio quality of the good one, and performs the environment information processing unit 29 However, the surrounding environment information data in which the measured position information is associated with the wireless quality is generated and stored. When the surrounding environment information data report request from the control device 1 is received, the surrounding environment information data is transmitted to the control device 1 accordingly.
In the mobile station apparatus 2, processing for measuring position information and radio quality is referred to as environment sensing processing.

The control device 1 receives the surrounding environment information data from the plurality of mobile station devices 2 and performs aggregation.
Here, the control device 1 previously divides the area where the service is provided into predetermined areas, and aggregates and stores the surrounding environment information data from each wireless communication system in association with the areas. At that time, the control device 1 averages the surrounding environment data transmitted from the plurality of mobile station devices 2 for each carrier frequency and radio communication system, and stores them as positional environment information data in association with the area.
That is, the location environment information data stores the latest radio quality status of each available radio communication system for each area.

  Also, the mobile station apparatus 2 periodically measures position information in order to acquire information on the optimal wireless communication system candidate to be connected, and the environment information processing unit 29 informs the control unit 1 of the position information. A request for location environment information data is transmitted with the mark.

  When the control device 1 receives the request for the location environment information data including the location information from the mobile station device 2, the control device 1 searches the location environment information data stored using the location information included in the request as a key, and the location information A predetermined number of radio systems with good communication quality are extracted in the area corresponding to, and the system name and location environment information data related to these systems are transmitted to the mobile station apparatus 2 as a list.

The mobile station device 2 selects a wireless communication system to be connected according to a preset condition based on the list received from the control device 1, and connects to the system. Alternatively, a plurality of wireless communication system names as connection destination candidates are displayed from the wireless communication system names listed in the list, and the user is allowed to select them.
In this way, an outline of the operation of the present system is performed.

[Outline of surrounding environment information data: Fig. 4]
Next, the surrounding environment information data transmitted from the mobile station apparatus 2 to the control apparatus 1 will be described with reference to FIG. FIG. 4 is an explanatory diagram showing an outline of the surrounding environment information data.
In the surrounding environment sensing process periodically performed in the mobile station apparatus 2, the carrier level measuring unit 24 measures the carrier level for all carrier frequencies (carrier frequencies # 0, # 1,...) And senses the surrounding environment. The data is output to the control unit 28.

The ambient environment sensing control unit 28 extracts a predetermined number (x) of carrier frequencies from the top of the carrier level (carrier frequencies #a, #b,...), And outputs a radio quality measurement instruction to the radio quality measurement unit 26. . In other words, the radio quality is measured by x carriers that can be captured at the current location.
A single carrier may be used by a plurality of wireless communication systems or a plurality of peripheral stations of the same system. In this case, a plurality of cells exist corresponding to the same carrier frequency.

  Then, the radio quality measurement unit 26 measures the radio quality of all the radio communication systems (radio communication system names #m, #n,...) Using the extracted carrier frequencies for the extracted x carrier frequencies. And output to the environment information processing unit 29.

As shown in FIG. 4, the surrounding environment information data includes position data (x1, y1) measured by the mobile station apparatus 2 and x carrier frequencies (carrier frequencies) having a high carrier level at the position of the mobile station apparatus 2. #A, #b,...) Is stored, and radio quality data of all radio communication systems using the carrier frequency is stored.
The radio quality data will be described later.

[Wireless quality data: Fig. 5]
The radio quality data shown in FIG. 4 will be specifically described with reference to FIG. FIG. 5 is an explanatory diagram of the radio quality data shown in FIG.
The radio quality data includes radio quality measured for each peripheral station (for each cell) of the radio communication system using each carrier frequency for x carrier frequencies having a good carrier level.
The peripheral station is a base station or a master station of the wireless communication system, and the mobile station device 2 identifies the peripheral station number from the broadcast information included in the received signal.
The radio quality data measured by the mobile station device 2 includes timing, propagation delay, SIR, and BLER.

  That is, the radio quality data measured by the mobile station apparatus 2 includes the timing measured for each peripheral station of the radio communication system name #m, #n,... For each of the carrier frequencies #a, #b,. , Measurement data of propagation delay, SIR, and BLER. In the example of FIG. 5, the peripheral station numbers #p and #q are detected in the radio communication system name #m of the carrier frequency #a, and the radio quality data is measured for each.

  Therefore, the surrounding environment information data transmitted from the environment information processing unit 29 of the mobile station device 2 in response to the surrounding environment information data report request from the control device 1 includes all the contents of FIG. 4 and FIG. , Position information of each mobile station device 2, a predetermined number of carrier frequencies and carrier levels that can be captured at that position, and the downlink of each cell (peripheral station) of the wireless communication system that uses the carrier frequency. The information is associated with the wireless quality data.

[Location environment information database: Fig. 6]
Next, the position environment information database provided in the storage unit 13 of the control device 1 will be described along with the operation of the control device 1. FIG. 6 is a schematic explanatory diagram of the location environment information database.
First, when the surrounding environment information data is transmitted from the mobile station device 2 to the control device 1, the base station or the master station of the wireless communication system to which the mobile station device 2 is connected receives the signal, At this time, the radio quality of the uplink from the mobile station apparatus 2 to the base station is measured. Uplink radio quality includes the amount of uplink interference and the maximum (allowable) transmission rate. The base station transmits peripheral environment information data and uplink radio quality data to the control apparatus 1.

The control device 1 receives the peripheral environment information data shown in FIGS. 4 and 5 and the accompanying uplink radio quality data from the plurality of mobile station devices 2 via the plurality of radio communication systems, The information is totaled for each area and stored in the position environment information database 14 as position environment information data for each area.
Note that the control device 1 stores in advance, as area information, an association between an area number and position data (x, y) of an area covered by the area, and in which area the position data is specified. It can be recognized whether it belongs.

  That is, the control device 1 determines which area the received surrounding environment information data and uplink radio quality data correspond to based on the position data, and a plurality of surrounding environment information data associated with the same area. Are further classified according to carrier frequency, wireless communication system name, and peripheral station number, and data is averaged.

Specifically, the control device 1 averages the carrier level for the same carrier frequency in the same area, and further, for each radio communication system name and peripheral station number, downlink radio quality data (SIR, BLER, etc.) Average data of uplink radio quality.
Then, the carrier frequency and carrier level that can be captured in each area, and the radio quality data for each cell (for each peripheral station) are stored as position environment information data for each area.

As shown in FIG. 6, the location environment information database includes, for each preset area number, a carrier level corresponding to the carrier frequency number captured by the mobile station device 2 located in the area, It stores radio quality data of all radio communication systems that use the carrier frequency.
The stored items are the same as the surrounding environment information data shown in FIG. 4, but the position environment information data in FIG. 6 is the total of the surrounding environment information data transmitted from the plurality of mobile station apparatuses 2 for each area. Is different.

In the example of FIG. 6, the position environment information data of the area (area # 0) where the mobile station apparatus 2 that transmitted the surrounding environment information data of FIGS. That is, the position environment information data of the area including the point of the position information (x1, y1).
As shown in FIG. 6, corresponding to area number # 0, carrier frequency numbers #a, #b, #c..., Respective carrier levels, and radio communication systems #m, using each carrier frequency Radio quality data of #n ... is stored.

[Wireless quality data in the location environment information database: FIG. 7]
The radio quality data of each radio communication system in the location environment information database shown in FIG. 6 will be described with reference to FIG. FIG. 7 is an explanatory diagram of radio quality data of each radio communication system in the location environment information database shown in FIG.
As shown in FIG. 7, the wireless quality data in the location environment information database is the same as the wireless quality data in the surrounding environment information database shown in FIG. 5, with respect to each of the carrier frequencies #a, #b,. It includes downlink, wireless quality data, timing, propagation delay, SIR, and BLER data measured for each of the peripheral stations #p, #q of the names #m, #n,. As the wireless quality data of the line, the amount of uplink interference, the maximum transmission rate, the cell radius, etc. are added and stored. The maximum transmission rate is the maximum transmission rate allowed according to the wireless quality at that time.

  Therefore, in the location environment information database, the surrounding environment information data is tabulated for each area, the carrier frequency that can be captured in the area and the radio quality information of the radio communication system are further added and stored on the network side. And includes all the contents of FIGS. 6 and 7.

[Processing of mobile station apparatus 2]
Next, the process of the mobile station apparatus 2 is demonstrated.
[Processing of mobile station apparatus 2 immediately after power-on: FIG. 8]
First, processing of the mobile station apparatus 2 immediately after power-on will be described with reference to FIG. FIG. 8 is a flowchart showing processing of the mobile station apparatus 2 immediately after power-on.
As shown in FIG. 8, when the power is turned on, the mobile station apparatus 2 starts up (100) in a preset default wireless communication system (100), and performs position measurement in the LCS measurement unit 22 (102). ) And output to the environment information processing unit 29. The environment information processing unit 29 stores the received position information.

  Then, the environment information processing unit 29 inquires of the control device 1 (“network side” in the figure) about the location environment information data in order to acquire information on the connection destination candidate wireless communication system that is the connection destination at the location. Do. Specifically, the environment information processing unit 29 creates position environment information acquisition request control data including the identification number of the mobile station apparatus 2 and transmits it to the control apparatus 1 (104).

Then, when the wireless unit 23 receives the location environment information data including the system name, the carrier frequency, and the wireless quality data of the connection destination candidate wireless communication system from the control device 1, the environment information processing unit 29 receives the location environment information data from the location environment information data. Each parameter is extracted (106). The parameters are individual data included in the position environment information data, and are radio frequencies such as carrier frequencies, SIRs, and maximum transmission rates for a plurality of wireless communication systems that can be used at the positions listed in the control device 1. Quality information.
Then, the connection system determination unit 30 determines which system to connect to in consideration of the prestored conditions based on the contents of the parameters (108).

  As a condition for determination, for example, a system with the smallest amount of uplink interference is selected, a system with the fastest maximum transmission rate is selected, or a system with the smallest propagation loss is selected. The user can arbitrarily set conditions according to various parameters and combinations thereof. It is also possible to store parameters that are not related to the radio quality such as a fee in the mobile station apparatus 2 in association with the radio communication system, and to include the fee in the selection condition.

Thereby, the most convenient radio communication system for the user can be selected from a plurality of radio communication systems with good radio quality provided from the control device 1.
In addition, a plurality of wireless communication system names received by the location environment information data may be displayed on the display unit of the mobile station device 2 as connection destination candidates so that the user can select them.

  Then, the main control unit 32 of the mobile station apparatus 2 connects to the wireless communication system selected by the connection system determination unit 30 or the operation unit, and shifts to the idle mode (110). In this way, processing at the time of power-on in the mobile station apparatus 2 is performed.

  The processes 102 to 108 in FIG. 8 are referred to as a connected system determination process. In the mobile station apparatus 2 of this system, the connection system determination process is periodically performed, so that the connection to the radio communication system that is optimal for the user is always possible.

[Processing of Mobile Station Device 2 in Idle Mode: FIG. 9]
Next, processing of the mobile station apparatus 2 in the idle mode will be described with reference to FIG. FIG. 9 is a flowchart showing processing of the mobile station apparatus 2 in the idle mode.
As shown in FIG. 9, the surrounding sensing control unit 28 of the mobile station device 2 determines whether it is the timing to start sensing of the surrounding environment when it enters the idle mode (200).
If it is not the time to start ambient environment sensing (in the case of No), the mobile station apparatus 2 proceeds to processing 204.

If it is time to start ambient environment sensing in the process 200 (in the case of Yes), the ambient environment sensing control unit 28 measures the radio unit 23, the carrier level measurement unit 24, and the radio quality measurement unit 26. The start is instructed, the carrier level is measured, the wireless quality is measured for a good one, and the result is output to the environment information processing unit 29.
Then, the environment information processing unit 29 creates peripheral environment information data based on the latest position information stored, the carrier frequency measured in the surrounding environment sensing process, the carrier level, and the wireless quality data, and stores the data. Keep it. The processing from the measurement of the carrier level and the wireless quality to the generation of the surrounding environment information data is set as the surrounding environment sensing process (202).
The surrounding environment sensing process will be described in detail later.

Then, the environment information processing unit 29 determines whether or not there is a report request for the surrounding environment information data from the control device 1 (“network side” in the figure) (204), and if there is no request (in the case of No), The mobile station apparatus 2 proceeds to processing 208.
Also, when there is a request for the surrounding environment information data from the control device 1 in the process 204 (in the case of Yes), the environment information processing unit 29 passes the surrounding environment information data via the baseband modulation / demodulation unit 25 and the radio unit 23. To the control device 1 (206).

Then, the environment information processing unit 29 determines whether or not it is time to determine the connected system (208), and if it is the start timing of connected system determination (in the case of Yes), the processing proceeds to processing 102 to processing 108 in FIG. The connected system determination process shown is performed (210).
If it is not the connection system determination start timing in the process 208 (No), the mobile station apparatus 2 proceeds to the process 200.
In this way, idle mode processing in the mobile station apparatus 2 is performed.

[Ambient environment sensing processing: FIG. 10]
Next, the surrounding environment sensing process shown in the process 202 of FIG. 9 will be described with reference to FIG. FIG. 10 is a flowchart showing the surrounding environment sensing process shown in the process 202 of FIG.
The surrounding environment sensing control unit 28 of the mobile station apparatus 2 first sets a carrier frequency for measuring the carrier level in the radio unit 23 (300). The radio unit 23 performs baseband conversion of the received signal at the set carrier frequency.

  Then, the carrier level measurement unit 24 measures the downlink carrier level for the set carrier frequency (302) and outputs it to the surrounding environment sensing control unit 28. The ambient environment sensing control unit 28 stores the carrier frequency and the carrier level in association with each other.

  Then, the surrounding environment sensing control unit 28 determines whether all carrier frequencies included in the available band have been set, that is, whether the carrier level has been measured up to the final carrier (304), and the carrier frequency is still Is left (in the case of No), the process proceeds to process 300 to set the next carrier frequency.

In the process 304, when the measurement of the carrier level is completed for all the carrier frequencies (in the case of Yes), the surrounding environment sensing control unit 28 generates a carrier level list that is a list of the carrier levels of all the stored carrier frequencies. Create (306).
Then, the ambient environment sensing control unit 28 rearranges (sorts) the carrier level list in descending order of the carrier level, and extracts the top x carrier frequencies (308). x is a predetermined number set in advance.

Next, for the extracted x carrier frequencies, the radio quality of the radio communication system using the carrier frequencies is measured.
First, the surrounding environment sensing control unit 28 sets the first carrier frequency among the extracted x carrier frequencies in the wireless unit 23 (310).
Furthermore, the surrounding environment sensing control unit 28 sets parameters of the wireless communication system using the carrier frequency in the baseband modem unit 24, the wireless quality measurement unit 26, and the broadcast information acquisition unit 27 (312).

Then, the broadcast information acquisition unit 27 of the mobile station apparatus 2 analyzes the broadcast information of the wireless communication system from the signals received via the radio unit 23 and the baseband modulation / demodulation unit 24, and the ID of the connected peripheral station, The system name and other system parameters are acquired (314), and the system name and peripheral station ID are output to the environment information processing unit 29.
The wireless quality measuring unit 26 measures wireless quality such as SIR and BLER for the wireless communication system (316) and outputs the measured wireless quality to the environment information processing unit 29.

Then, the surrounding environment sensing control unit 28 confirms whether there is any other wireless communication system using the carrier frequency (318). The next wireless communication system is set by shifting, and the same processing is repeated.
If there is no other wireless communication system in the process 318 (Yes), the surrounding environment sensing control unit 28 determines whether the measurement of the radio quality for the x carrier frequencies extracted in the process 308 has been completed. (320), and if not completed (in the case of No), the process proceeds to process 310 to set the next carrier frequency.

In the process 320, when the measurement of the radio quality for the x carrier frequencies is finished (in the case of Yes), the environment information processing unit 29, the position information, the carrier frequency and the carrier level, the radio quality data, Based on the wireless system name and the peripheral station ID, peripheral environment information data is created and stored (322).
In this way, the surrounding environment sensing process is performed.

[Processing in Communication Mode: FIG. 11]
Next, processing in the communication mode of the mobile station apparatus 2 will be described with reference to FIG. FIG. 11 is a flowchart showing processing in the communication mode of the mobile station apparatus 2 of the present system.
The communication mode is an operation mode during communication of the mobile station apparatus 2 and is a mode for performing cell or system transition accompanying movement. During communication, it is expected that the cell moves within the same wireless communication system or moves to a different wireless communication system via the handover state.

As shown in FIG. 11, when the communication is started, the mobile station apparatus 2 performs a connection system determination process so that communication can be performed with an optimum system at that position (400).
Then, the main control unit 32 performs the same call connection process as the conventional one with the selected optimum system (402). After the call connection, normal application data transmission / reception, cell quality measurement during the call connection, etc. are performed (404).

  The main control unit 32 monitors whether the quality of the cell during call connection and the quality of the communication itself satisfy a predetermined quality (406), and the quality of the call connection cell satisfies the predetermined quality. If yes (Yes), the process proceeds to processing 404.

If the quality of the cell during call connection is less than the predetermined quality in the process 406 (in the case of No), the environment information processing unit 29 and the connection system determination unit 30 of the mobile station device 2 Judgment processing is performed (408).
Then, the connection system determination unit 30 determines whether the cell of the system with a higher quality than the cell currently performing the call connection or another of the same system based on the information of the connection destination candidate included in the received location environment information data. It is determined whether or not there is a cell, and if there is a good cell, it is selected and notified to the main control unit 32. The main control unit 32 performs a process of shifting to the system or the cell (412).

Thus, in the mobile station device 2 of this system, the location environment information data from the control device 1 includes the cell information that can be detected at the current location, together with the radio quality information. By confirming, it is possible to improve the selection accuracy of the migration destination cell.
In this way, processing of the mobile station apparatus 2 in the communication mode is performed.

[Processing of control device 1]
Next, processing of the control device 1 will be described.
[Position environment information data aggregation processing: FIG. 12]
First, the position environment information data totaling process in the control device 1 will be described with reference to FIG. FIG. 12 is a flowchart showing the position environment information data totaling process in the control unit 11 of the control device 1.
As shown in FIG. 12, the control unit 11 of the control device 1 (hereinafter referred to as “control device 1”) periodically requests the surrounding environment information data from each mobile station device 2 via the wireless communication system (500). ). The surrounding environment information data includes the cell information of the top x carrier level detected by each mobile station apparatus 2 together with the radio quality data. The cell information includes a carrier frequency and a carrier level, a wireless communication system name, and a peripheral station ID.

  When the control device 1 receives the surrounding environment information data from the mobile station device 2 via the wireless communication system, the control device 1 associates the data with each area (each area number) based on the position information included in the surrounding environment information data. Store (504). The ambient environment information data received by the control device 1 is attached with uplink radio quality data.

Further, the control device 1 averages downlink radio quality data for each carrier frequency, radio communication system, and peripheral station based on the surrounding environment information data classified for each area (506).
Then, the control device 1 adds the uplink radio quality data obtained by averaging the information such as the uplink interference amount, the maximum transmission rate, and the cell radius that can be recognized on the network side, and generates the position environment information data (508). Thereby, the radio quality data is averaged for each cell of the radio communication system that can be captured in each area.
Then, the control device 1 stores the position environment information data for each area in the position environment information database 14 (510).
In this way, the position environment information data totaling process is performed.

[Position environment information data distribution processing: FIG. 13]
Next, position environment information data distribution processing in the control device 1 will be described with reference to FIG. FIG. 13 is a flowchart showing position environment information data distribution processing in the control unit 11 of the control device 1. The location environment information distribution process is a process for distributing information of connection destination candidates.
As shown in FIG. 13, the control device 1 determines whether or not a request for acquisition of location environment information data has been received from the mobile station device 2 (600). The position information of the mobile station apparatus 2 included is read, and the area number corresponding to the position information is specified (602).

  Then, the control device 1 refers to the position environment information data of the area number and extracts a predetermined number of cells with good radio quality (604). As a reference for extraction, a parameter set in advance in the control device 1 or a condition combining a plurality of parameters is used. For example, the extraction is performed under the condition that the maximum transmission rate is large and the SIR is favorable. It is also possible to use the carrier level as a condition. Note that extracting a cell means extracting a specific peripheral station of a specific wireless communication system.

Then, the control device 1 lists the extracted location environment information data of a plurality of cells in the order of good radio quality, and transmits the data to the requesting mobile station device 2 as connection destination candidate information.
The information transmitted as the connection destination candidate information includes carrier frequency, radio communication system name, and radio quality data among the extracted location environment information data of a plurality of cells.

Further, the connection destination candidate information can be transmitted not only for all items of the position environment information data but only for specific items set in advance in the control device 1 such as SIR and maximum transmission speed.
In this way, the location environment information data distribution process of the control device 1 is performed.

  As a result, the requesting mobile station apparatus 2 can receive the wireless communication system and peripheral station candidates that can be connected at the current location and their wireless quality information as position environment information data from the control apparatus 1. Based on the data, it is possible to select a wireless communication system and peripheral stations of good quality with a simple process with high accuracy as a connection destination system.

  In addition, conditions for extracting connection destination candidates are set in the control device 1 in order of increasing carrier level or in ascending order of charges, so that the control device 1 can select from the cells that can be captured in the area. It is also possible to select an upper cell in accordance with the conditions, list them up in the order that matches the conditions, and transmit to the mobile station apparatus 2. Alternatively, the wireless quality parameter may be combined with these conditions.

  Further, the mobile station device 2 transmits the location environment information data acquisition request including a condition for extracting connection destination candidates, and the control device 1 selects a higher cell from the captureable cells according to the condition. Then, they may be listed up in the order that matches the conditions and transmitted to the mobile station apparatus 2.

[Effect of the embodiment]
According to the mobile communication system according to the embodiment of the present invention, the mobile station apparatus 2 acquires position information from the GPS signal periodically received, measures the carrier level for the available carrier frequency, For a predetermined number of carrier frequencies having a large frequency, the downlink radio quality is measured for each cell of the radio communication system using the carrier frequency, and the environment information processing unit 29 determines the position information, the carrier frequency, and the radio communication system. The wireless quality data for each cell is associated and transmitted to the control device 1 as peripheral environment information data, and the control device 1 is added by the wireless communication system with the peripheral environment information data received from the plurality of mobile station devices 2. The uplink radio quality data is associated with each preset area based on the position information included in each surrounding environment information data. A position where the wireless quality is averaged for each peripheral station (for each cell) of the wireless communication system, position environment information data is generated and stored in the position environment information database 14, and the position information is added from the mobile station apparatus 2. When the environment information data acquisition request is received, the location environment information data of the area corresponding to the location information is referred to, the peripheral station of the radio communication system with good radio quality is extracted, and the location environment information data of the cell is obtained. Information of connection destination candidates is transmitted to the mobile station apparatus 2, and in the mobile station apparatus 2, the connection system determination unit 30 analyzes the received location environment information data and based on a selection condition set in advance. Since the main control unit 32 is connected to the wireless communication system, the control device 1 determines each wireless communication system for each area. The mobile station apparatus 2 can grasp the status of the new uplink and downlink radio quality, and if the mobile station apparatus 2 transmits position information, the mobile station apparatus 2 can detect the carrier frequency, the radio communication system, and the peripheral stations as information on cells connectable at the position. Information and each wireless quality, and it is only necessary to select a system that meets the user's request from among them, and it is possible to connect to the optimal system with simple processing, reduce handover processing, There is an effect that convenience can be improved.

  In addition, conditions for extracting connection candidate cells are set in the control apparatus 1 in advance, and the control apparatus 1 lists the cells in the order that matches the conditions and transmits them to the mobile station apparatus 2. May be.

  Further, when the mobile station apparatus 2 transmits the location environment information data acquisition request, the mobile station apparatus 2 adds a condition for extracting connection candidate cells and transmits the request, and the control apparatus 1 lists candidate cells according to the conditions. It may be transmitted, and there is an effect that a more suitable connection destination candidate can be extracted according to a user's request.

  The present invention is particularly suitable for a mobile communication system capable of reducing cell movement processing and handover processing during communication in a mobile station apparatus and improving user convenience.

  DESCRIPTION OF SYMBOLS 1 ... Control apparatus, 2 ... Mobile station apparatus, 11 ... Control part, 12 ... Memory | storage part, 13 ... Interface part, 21 ... GPS signal receiving part, 22 ... LCS measurement part, 23 ... Radio | wireless part, 24 ... Carrier level measurement part 25 ... Baseband modulation / demodulation unit, 26 ... Radio quality measurement unit, 27 ... Broadcast information acquisition unit, 28 ... Ambient environment sensing control unit, 29 ... Environmental information processing unit, 30 ... Connection system determination unit, 31 ... Application data transmission / reception unit 32 ... Main control unit

Claims (1)

A mobile communication system comprising a plurality of mobile station devices connectable to a plurality of radio communication systems, and a control device that communicates with the plurality of mobile station devices via the plurality of radio communication systems,
A position information measuring unit that acquires position information based on a received signal by the mobile station apparatus, and a carrier frequency having a good reception carrier level among carrier frequencies used in the wireless communication system, A sensing processing unit for measuring wireless quality data of a wireless communication system using the wireless communication system, and the control device as peripheral environment information data by associating the position information, the carrier frequency, the wireless quality data of the wireless communication system, and a system name Based on the information on the connection destination candidate, and an environment information processing unit that periodically sends the position information to the control device and requests a position environment information data acquisition request for requesting the connection destination candidate information. A connection system determination unit for determining a connection destination wireless communication system,
When the control device receives the surrounding environment information data from the plurality of mobile station devices, based on position information included in the surrounding environment information data, a carrier frequency included in the surrounding environment information data and a radio communication system Radio quality data and system names are stored in association with a plurality of preset areas as location environment information data, and when the location environment information data acquisition request is received from the mobile station device, the location included in the request A plurality of radio communication systems with good radio quality data are extracted by referring to the location environment information data of the area corresponding to the information, the system name of the plurality of extracted radio communication systems and the corresponding carrier frequency and radio quality data And a control unit that transmits the information as information of the connection destination candidate to the mobile station apparatus. Shin system.

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