JP2012105203A - Apparatus and method for processing adjacent cell and data structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjacent cell processing apparatus making an operation in a radio communication system to be efficient by generating appropriate adjacent cell information and to provide an adjacent cell processing method and a data structure.SOLUTION: The adjacent cell processing apparatus in the communication system communicable with a plurality of radio base station devices by permitting radio terminal equipment 202 to perform a moving operation includes: an adjacent cell information generating portion 12 for generating adjacent cell information showing one or a plurality of radio base station devices which the radio terminal equipment 202 in the middle of communication with an objective radio base station device can communicate in the plurality of radio base station devices except for the objective radio base station device at every radio terminal equipment 202 in the middle of communication with the objective radio base station device; and an adjacent cell information transmitting portion 14 for transmitting the adjacent cell information generated by the adjacent cell information generating portion to the corresponding radio terminal equipment 202 or the objective radio base station device.

Description

  The present invention relates to an adjacent cell processing apparatus, an adjacent cell processing method, and a data structure, and more particularly, to an adjacent cell processing apparatus and an adjacent cell in a communication system in which a radio terminal apparatus can communicate with a plurality of radio base station apparatuses by performing a moving operation. The present invention relates to a processing method and a data structure.

  Conventionally, in a mobile communication system, a communication service is provided by a radio base station apparatus (hereinafter also referred to as a macro base station) that forms an area in which a cell having a radius of several hundred meters to several tens of kilometers, that is, a radio terminal apparatus can communicate. It was.

  In recent years, due to a dramatic increase in the number of subscribers of mobile communication services and an increase in the amount of communication traffic due to data communication, subscribers and communication traffic are distributed by forming smaller radius cells, and a certain level of communication It is desirable to provide speed to users in a stable manner. In addition, in order to deal with dead zones associated with the increase in the number of buildings, it is desired to install radio base station devices on the corporate floor and in ordinary households.

  Together with these demands, the processing capability of various devices used in the radio base station apparatus has been dramatically improved, and the miniaturization of the radio base station apparatus has progressed. Collecting.

  Since the radius of the femto cell (Femto Cell) formed by this small base station (hereinafter also referred to as a femto base station) is as small as about 10 meters, the femto base station is the macro cell (Macro Cell) formed by the macro base station. It can be used in places such as homes and underground malls that are outside the service area and where it is difficult to install macro base stations.

  In addition, since many femto base stations are installed in a specific area, it is difficult to connect the femto base stations directly to the core network. For this reason, it is conceivable that a large number of femto base stations installed in a specific area are once connected to a gateway device such as a HeNB-GW, and the femto base station and the core network are connected via the HeNB-GW.

  In such a configuration, when an operator or a purchaser of a femto base station performs setting of each femto base station when installing the femto base station, considerable work and cost are required. Further, every time a femto base station is newly installed and the number of femto base stations is increased, not only newly installed femto base stations but also existing surrounding femto base stations must be reset.

  As a configuration for solving such problems, for example, Patent Document 1 discloses the following technique. That is, the new cell measures the signal strength of various different channels used by the existing cell. The new cell creates a list of candidate channels corresponding to channels with high signal strength and transmits this list to the mobile switching center of the cellular system. The mobile switching center determines which candidate channel corresponds to the beacon used in the existing cell and transmits configuration information about each of these existing cells to the new cell. Thus, the new cell automatically receives configuration information regarding neighboring cells. If the mobile switching center determines that the identified neighbor (adjacent cell) has not reached the maximum value N, then the mobile switching center will add additional candidate channels (ie, more (Candidate channel with low signal strength) is requested to be transmitted.

JP-A-11-333131

  The femto base station operates in, for example, an open / hybrid / closed access mode. When the femto base station operates in the closed access mode, only registered members (terminals) can be connected. When operating in the closed access mode, the service is provided only to registered members. When operating in the hybrid mode, the service is provided to both registered members and unregistered members, that is, non-members. Further, when operating in the open access mode, the same operation as the macro base station is performed.

  Further, the purchaser of the femto base station can uniquely determine the installation location of the femto base station. For this reason, in a radio communication system in which a femto base station is installed, the femto base station is likely to move and the power is turned on / off. Therefore, appropriate neighboring cell information in the radio base station apparatus in which the femto base station exists in the vicinity. It becomes difficult to generate.

  For example, the wireless terminal device measures the received power from the femto base station registered in the neighboring cell information autonomously or in accordance with an instruction from the femto base station using the neighboring cell information, and uses the measurement result. Report to femto base station. In this case, when a femto base station that is not suitable as a handover destination, such as a closed access mode femto base station in which the wireless terminal device is not registered or a power-off femto base station, is registered in the neighboring cell information. The wireless terminal device performs a useless measurement operation, and a useless handover occurs.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an adjacent cell processing apparatus capable of increasing the efficiency of operation in a wireless communication system by generating appropriate adjacent cell information. To provide a neighbor cell processing method and data structure.

  (1) In order to solve the above-described problem, an adjacent cell processing apparatus according to an aspect of the present invention is an adjacent cell processing in a communication system in which a wireless terminal apparatus can communicate with a plurality of wireless base station apparatuses by performing a moving operation. One or a plurality of the radio base stations that can communicate with the radio terminal device communicating with the target radio base station device among the plurality of radio base station devices other than the target radio base station device A neighboring cell information generating unit for generating neighboring cell information indicating a device for each of the wireless terminal devices communicating with the target wireless base station device, and the neighboring cell information generated by the neighboring cell information generating unit. An adjacent cell information transmission unit for transmitting to the corresponding wireless terminal device or the target wireless base station device.

  As described above, the neighboring cell information is generated for each wireless terminal device in communication with the target wireless base station device, and the wireless terminal device that can communicate with the wireless terminal device is included in the neighboring cell information. It is possible to prevent performing a useless measurement operation and suppress occurrence of useless handover. In addition, since an inappropriate radio base station apparatus is not included in the neighboring cell information, an increase in the transmission band for transmitting neighboring cell information is suppressed, and the target radio base station is reduced by shortening the transmission time. Interference with other radio base station apparatuses and other radio terminal apparatuses around the apparatus can be reduced. In addition, even in a wireless terminal device that receives neighboring cell information, it is not necessary to receive data with a large capacity, and an increase in power consumption can be prevented. In addition, it is possible to prevent the radio base station apparatus included in the neighboring cell information from being inappropriately reduced, and to appropriately perform handover of the radio terminal apparatus.

  In addition, since the neighboring cell information can be automatically optimized regardless of the movement of the radio base station apparatus and the power on / off, the operation of the communication system can be made more efficient without human intervention. Can do. In addition, since the neighboring cell information is automatically optimized, a special installation process for the radio base station apparatus is not required, so that the work time and cost for installing the radio base station apparatus can be reduced. Can do.

  Therefore, it is possible to improve the efficiency of the operation in the communication system by generating appropriate neighboring cell information.

  (2) Preferably, the adjacent cell information generation unit excludes at least the radio base station apparatus that is powered off from the plurality of radio base station apparatuses other than the target radio base station apparatus. Generate cell information.

  As described above, the configuration in which the wireless base station device that is turned off is excluded from the neighboring cell information, and the wireless base station device that cannot be surely communicated with by the wireless terminal device can be excluded from the neighboring cell information. Can prevent the handover operation and the measurement operation.

  (3) More preferably, the neighboring cell information generation unit may be configured to communicate with the new wireless terminal device when the new wireless terminal device starts communication with the target wireless base station device. Power source information indicating whether the radio base station apparatus is powered on or off is acquired, and neighboring cell information for the new radio terminal apparatus excluding at least the radio base station apparatus that is powered off Is generated.

  Thus, it is possible to generate appropriate neighboring cell information by determining whether to register the wireless base station device in the neighboring cell information after grasping the latest power state of the wireless base station device. It becomes.

  (4) Preferably, at least any one of the plurality of radio base station devices in the communication system operates in an open access mode in which communication is permitted to all the radio terminal devices, or the radio It is possible to register a terminal device, operate in a closed access mode that allows communication to the registered wireless terminal device, or it is possible to register the wireless terminal device It is possible to set whether to operate in a hybrid mode that allows communication to both the wireless terminal device and the unregistered wireless terminal device, and the neighboring cell information generation unit is other than the target wireless base station device Among the plurality of wireless base station devices, the wireless terminal device operating in the closed access mode and the corresponding wireless terminal device is registered. Generating at least except adjacent cell information to the radio base station apparatus not.

  As described above, since the wireless base station device that is not permitted to access the wireless terminal device is excluded from the neighboring cell information, the wireless base station device that cannot communicate with the wireless terminal device can be excluded from the neighboring cell information. It is possible to prevent useless handover operations and measurement operations by the apparatus.

  (5) Preferably, the neighboring cell processing device is further communicable with one or a plurality of the radio base station devices arranged around the target radio base station device and the one or a plurality of radio base station devices. A communication system information acquisition unit for acquiring communication system information indicating a correspondence relationship between one or a plurality of wireless terminal devices, wherein the adjacent cell information generation unit generates the adjacent cell information based on the communication system information To do.

  With such a configuration, it is possible to generate optimal neighboring cell information based on the configuration of the communication system.

  (6) More preferably, the communication system information includes the identification information of the radio base station apparatus notified from the radio base station apparatus other than the target radio base station apparatus that has detected the target radio base station apparatus, and the It is generated based on the identification information of the target radio base station apparatus.

  With such a configuration, it is possible to construct appropriate communication system information, and it is possible to realize further efficiency of operation in the communication system.

  (7) More preferably, the communication system information includes identification information of the target radio base station device acquired based on position information indicating an installation location of the radio base station device other than the target radio base station device, and It is generated based on the identification information of the radio base station apparatus corresponding to the position information.

  With such a configuration, it is possible to construct appropriate communication system information, and it is possible to realize further efficiency of operation in the communication system.

  (8) More preferably, the communication system information is power information indicating whether the radio base station apparatus is turned on or off, which is notified from the radio base station apparatus other than the target radio base station apparatus. Is generated based on

  With such a configuration, the power state of the radio base station apparatus can be acquired and reflected in the communication system information, and appropriate neighboring cell information can be generated.

  (9) More preferably, the communication system information is periodically notified from the radio base station apparatus other than the target radio base station apparatus, and indicates that the power of the radio base station apparatus is turned on Generated based on information.

  With such a configuration, the power state of the radio base station apparatus can be acquired and reflected in the communication system information, and appropriate neighboring cell information can be generated. Further, it is possible to detect power off due to the occurrence of an abnormality in the radio base station apparatus.

  (10) More preferably, the communication system information acquisition unit acquires the communication system information from a management apparatus that stores information on each of the radio base station apparatuses in the communication system.

  In this way, with the configuration in which each radio base station apparatus acquires communication system information from a management apparatus that manages information for the entire communication system, it is possible to efficiently generate neighboring cell information for the entire communication system.

  (11) An adjacent cell processing apparatus according to another aspect of the present invention is an adjacent cell processing apparatus in a communication system capable of communicating with a plurality of radio base station apparatuses when a radio terminal apparatus performs a mobile operation, Neighbors for generating neighboring cell information indicating one or a plurality of the radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the radio base station device To transmit the neighboring cell information generated by the cell information generating unit and the neighboring cell information generating unit to the target radio base station apparatus or to notify the radio terminal apparatus capable of communicating with the target radio base station apparatus A neighboring cell information transmission unit, wherein the neighboring cell information generation unit adds one or more new radio base station devices to the neighboring cell information, When the number of the radio base station devices in the neighboring cell information exceeds a predetermined value when one or more of the radio base station devices are added, the neighboring cell information includes the new one or more radio base stations. If the adjacent cell information generation unit does not add one or more of the new radio base station devices to the adjacent cell information without adding a device, the adjacent cell information transmission unit A part of the new one or a plurality of the radio base station devices to the radio terminal device that is in communication with a device and can communicate with a part or all of the new one or a plurality of the radio base station devices Alternatively, all information is notified as information different from the neighboring cell information.

  With such a configuration, since it is possible to notify a radio terminal apparatus in communication with the target radio base station apparatus as an adjacent cell, an appropriate and sufficient number of radio base station apparatuses as measurement targets and handover targets, the communication The efficiency of operation in the system can be improved.

  (12) An adjacent cell processing apparatus according to another aspect of the present invention is an adjacent cell processing apparatus in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of the radio terminal apparatus. Neighbors for generating neighboring cell information indicating one or a plurality of the radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the radio base station device To transmit the neighboring cell information generated by the cell information generating unit and the neighboring cell information generating unit to the target radio base station apparatus or to notify the radio terminal apparatus capable of communicating with the target radio base station apparatus A neighboring cell information transmission unit, wherein the neighboring cell information generation unit adds one or more new radio base station devices to the neighboring cell information, When one or more of the radio base station devices are added and the number of the radio base station devices in the neighboring cell information exceeds a predetermined value, one or more of the radio base station devices indicated in the neighboring cell information Among these, the radio base station apparatus that satisfies the following conditions is deleted from the neighboring cell information, and the one or more new radio base station apparatuses are added to the neighboring cell information after the deletion.

Condition: A wireless base station device in which no wireless terminal device is permitted to communicate among the wireless terminal devices that can communicate with the target wireless base station device. With this configuration, the wireless terminal device communicates with the target wireless base station device. Since it is possible to notify neighboring cell information in which a sufficient and sufficient number of radio base station devices are registered as measurement targets and handover targets to possible radio terminal devices, it is possible to improve the efficiency of the operation in the communication system Can do.

  Preferably, the neighboring cell information generation unit measures a reception level by the wireless terminal device that is not communicating with the target wireless base station device among the plurality of wireless base station devices other than the target wireless base station device. Neighbor cell information indicating one or a plurality of the radio base station apparatuses transmitting a target radio signal is generated.

  With such a configuration, the number of neighboring cells that are the targets of periodic power measurement indicated by broadcast information from the radio base station apparatus can be reduced, so that the radio terminal apparatus performs a useless measurement operation. Can be prevented. In particular, since the power consumption of the idle wireless terminal device can be reduced, a remarkable effect can be obtained.

  Preferably, the neighboring cell information generation unit is a moving destination candidate of a wireless terminal device communicating with the target wireless base station device among the plurality of wireless base station devices other than the target wireless base station device. Alternatively, neighboring cell information indicating a plurality of the wireless base station devices is generated.

  With this configuration, it is possible to optimize the movement operation within the cell of the installed radio base station apparatus. In addition, by optimizing neighboring cell information, the number of neighboring cells that are candidates for the destination of the wireless terminal device in communication can be reduced, so that it is possible to prevent unnecessary movement operations from occurring. .

  Preferably, the neighboring cell information generation unit indicates one or a plurality of the radio base station devices to be measured by the radio terminal device among a plurality of the radio base station devices other than the target radio base station device. Neighbor cell information is generated.

  In this way, by optimizing the neighboring cell information, the number of neighboring cells to be measured by the wireless terminal device can be reduced, thereby preventing the wireless terminal device from performing a useless measurement operation. be able to.

  Preferably, the neighboring cell information generation unit transmits a radio signal for which the radio terminal device measures a reception level among a plurality of the radio base station devices other than the target radio base station device. Neighbor cell information indicating the plurality of radio base station apparatuses is generated.

  In this way, by optimizing the neighboring cell information, the number of neighboring cells for which the wireless terminal device performs reception level measurement can be reduced, so that the wireless terminal device performs useless measurement operation. Can be prevented.

  (13) Preferably, at least one of the plurality of radio base station apparatuses other than the target radio base station apparatus is a femto base station.

  In this way, appropriate neighboring cell information is generated in a radio base station apparatus in which a femto base station capable of setting access restrictions is arranged in the vicinity, with frequent power on / off and cell movement. As a result, the effect of increasing the efficiency of the operation in the communication system can be obtained more remarkably.

  (14) Preferably, the adjacent cell processing device is included in one or a plurality of the radio base station devices.

  With this configuration, for example, it is not necessary to perform optimization of neighboring cell information of each radio base station device in a higher-level device in the core network, distribution of processing load in the communication system, and communication between the radio base station device and the higher-level device. The amount can be reduced.

  (15) In order to solve the above-described problem, an adjacent cell processing method according to an aspect of the present invention is an adjacent cell processing in a communication system in which a wireless terminal device can communicate with a plurality of wireless base station devices by performing a moving operation. One or a plurality of the radio base stations capable of communicating with the radio terminal device communicating with the target radio base station device among the plurality of radio base station devices other than the target radio base station device. Generating neighboring cell information indicating a device for each of the wireless terminal devices in communication with the target radio base station device; and the corresponding wireless terminal device or the target radio base station device corresponding to the generated neighboring cell information To send to.

  As described above, the neighboring cell information is generated for each wireless terminal device in communication with the target wireless base station device, and the wireless terminal device that can communicate with the wireless terminal device is included in the neighboring cell information. It is possible to prevent performing a useless measurement operation and suppress occurrence of useless handover. In addition, since an inappropriate radio base station apparatus is not included in the neighboring cell information, an increase in the transmission band for transmitting neighboring cell information is suppressed, and the target radio base station is reduced by shortening the transmission time. Interference with other radio base station apparatuses and other radio terminal apparatuses around the apparatus can be reduced. In addition, even in a wireless terminal device that receives neighboring cell information, it is not necessary to receive data with a large capacity, and an increase in power consumption can be prevented. In addition, it is possible to prevent the radio base station apparatus included in the neighboring cell information from being inappropriately reduced, and to appropriately perform handover of the radio terminal apparatus.

  In addition, since the neighboring cell information can be automatically optimized regardless of the movement of the radio base station apparatus and the power on / off, the operation of the communication system can be made more efficient without human intervention. Can do. In addition, since the neighboring cell information is automatically optimized, a special installation process for the radio base station apparatus is not required, so that the work time and cost for installing the radio base station apparatus can be reduced. Can do.

  Therefore, it is possible to improve the efficiency of the operation in the communication system by generating appropriate neighboring cell information.

  (16) An adjacent cell processing method according to another aspect of the present invention is an adjacent cell processing method in a communication system in which a radio terminal apparatus can communicate with a plurality of radio base station apparatuses by performing a mobile operation, Generating neighboring cell information indicating one or a plurality of radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the radio base station device; Transmitting the neighbor cell information generated by the neighbor cell information generation unit to the target radio base station apparatus or notifying the radio terminal apparatus capable of communicating with the target radio base station apparatus, In the step of generating cell information, when one or more new radio base station devices are added to the neighboring cell information, When the number of the radio base station devices is added and the number of the radio base station devices in the neighboring cell information exceeds a predetermined value, the new one or more radio base station devices are added to the neighboring cell information. First, in the step of transmitting the neighboring cell information, in the step of generating the neighboring cell information, if the new one or more radio base station devices are not added to the neighboring cell information, the target radio base One of the new one or a plurality of the radio base station apparatuses is in communication with a station apparatus and can communicate with a part or all of the one or a plurality of the new radio base station apparatuses. Part or all of the information is notified as information different from the neighboring cell information.

  With such a configuration, since it is possible to notify a radio terminal apparatus in communication with the target radio base station apparatus as an adjacent cell, an appropriate and sufficient number of radio base station apparatuses as measurement targets and handover targets, the communication The efficiency of operation in the system can be improved.

  (17) An adjacent cell processing method according to another aspect of the present invention is an adjacent cell processing method in a communication system in which a radio terminal apparatus can communicate with a plurality of radio base station apparatuses by performing a mobile operation. Generating neighboring cell information indicating one or a plurality of radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the radio base station device; Transmitting the generated neighboring cell information to the target radio base station apparatus or notifying the radio terminal apparatus capable of communicating with the target radio base station apparatus, and generating the neighboring cell information. Is a case where one or more new radio base station devices are added to the neighboring cell information, and the one or more new radio base station devices are added. Then, when the number of the radio base station devices in the neighboring cell information exceeds a predetermined value, the radio base station device satisfying the following condition among one or a plurality of the radio base station devices indicated in the neighboring cell information Is deleted from the neighboring cell information, and the new one or more radio base station apparatuses are added to the neighboring cell information after the deletion.

Condition: A wireless base station device in which no wireless terminal device is permitted to communicate among the wireless terminal devices that can communicate with the target wireless base station device. With this configuration, the wireless terminal device communicates with the target wireless base station device. Since it is possible to notify neighboring cell information in which a sufficient and sufficient number of radio base station devices are registered as measurement targets and handover targets to possible radio terminal devices, it is possible to improve the efficiency of the operation in the communication system Can do.

  (18) In order to solve the above-described problem, a data structure according to an aspect of the present invention is a data structure of information notified between radio base station apparatuses, and indicates a power source indicating a power state of the radio base station apparatus With state data.

  With such a configuration, for example, it is possible to notify the power state between base stations using a logical inter-base station interface, which can contribute to generation of appropriate neighboring cell information.

  (19) A data structure according to another aspect of the present invention is a data structure of information notified between one or a plurality of radio base station apparatuses and a host apparatus capable of communicating with each of the radio base station apparatuses. , Transmission source base station identification data indicating identification information of the radio base station apparatus which is the transmission source of the information, and power supply state data indicating a power supply state of the radio base station apparatus which is the transmission source of the information.

  With such a configuration, for example, it is possible to notify the power supply state between the base stations via the host device using a logical base station-provider network interface, which contributes to generation of appropriate neighboring cell information. Can do.

  (20) A data structure according to another aspect of the present invention is a data structure of information notified to each of the radio base station devices from a host device capable of communicating with one or a plurality of radio base station devices, Base station identification data indicating identification information of a radio base station apparatus, and power state data indicating a power state of the radio base station apparatus corresponding to the identification information.

  With such a configuration, it becomes possible to notify the base station of the power supply state from the host device.

  (21) Preferably, the power status data indicates whether the power of the radio base station device has transitioned from on to off or from off to on.

  With such a configuration, when the power state of a certain base station transitions, it becomes possible to acquire information related to the transition in another base station.

  (22) Preferably, the power state data indicates whether the power of the radio base station apparatus is in an on state or an off state.

  With such a configuration, it becomes possible to periodically acquire the power state of a certain base station, for example.

  (23) Preferably, the data structure further includes load status data indicating a load status of the radio base station device, and communication terminal number data indicating the number of radio terminal devices communicating with the radio base station device. At least one is provided.

  With this configuration, a base station can notify other base stations in advance of its own power status as well as its own load status and the number of connected terminals, thereby preventing unnecessary measurement operations and handover operations. it can.

  (24) A data structure according to another aspect of the present invention is a data structure of information notified between radio base station apparatuses, and requests that the radio base station apparatus be notified of a power state. Power status notification request data shown.

  With such a configuration, it becomes possible to request notification of the power supply state from one base station to another base station autonomously, which can contribute to generation of appropriate neighboring cell information.

  (25) A data structure according to another aspect of the present invention is a data structure of information notified between one or a plurality of radio base station apparatuses and an upper apparatus capable of communicating with each of the radio base station apparatuses. , Transmission source base station identification data indicating identification information of the wireless base station device that is the transmission source of the information, and a power state notification request indicating that a request for notification of the power state is requested to the other wireless base station device Data.

  With such a configuration, it becomes possible to request notification of the power state from another base station to another base station autonomously via a higher-level device, thereby contributing to generation of appropriate neighboring cell information.

  (26) Preferably, the data structure further includes transmission destination base station identification data indicating identification information of one or more of the radio base station apparatuses that are transmission destinations of the information.

  With such a configuration, it is not necessary to determine the message transmission destination in the host device, and the processing load in the host device can be reduced.

  According to the present invention, it is possible to improve the efficiency of operation in a wireless communication system by generating appropriate neighboring cell information.

It is a figure which shows the relationship between the wireless terminal device which can be connected with the access mode of the femto base station which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of arrangement | positioning of the radio base station apparatus in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the macro base station which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the signal processing part in the macro base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the communication system information in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the neighboring cell information which a macro base station produces | generates in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the neighboring cell information which a macro base station produces | generates in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the sequence of the hand-over operation | movement in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. In the radio | wireless communications system which concerns on the 1st Embodiment of this invention, a radio base station apparatus is a figure which shows an example of the method which notifies neighboring cell information to a radio | wireless terminal apparatus. In the radio | wireless communications system which concerns on the 1st Embodiment of this invention, a radio base station apparatus is a figure which shows an example of the method which notifies neighboring cell information to a radio | wireless terminal apparatus. It is a figure which shows an example of the power supply transition notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the power supply state notification request message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the power supply status notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows the other example of the power supply state notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the power supply status notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the power supply state notification request message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the power supply status notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows the other example of the power supply state notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows the other example of the base station power status notification message in the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the signal processing part in the macro base station which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the neighboring cell information which a macro base station produces | generates in the radio | wireless communications system which concerns on the 2nd Embodiment of this invention. It is the flowchart which defined the operation | movement procedure at the time of the macro base station which concerns on the 2nd Embodiment of this invention updating neighboring cell information. It is the flowchart which defined the other example of the operation | movement procedure at the time of the macro base station which concerns on the 2nd Embodiment of this invention updating neighboring cell information. FIG. 10 is a diagram illustrating an example of a method in which a wireless base station device notifies neighboring cell information to a wireless terminal device, in the wireless communication system according to the second embodiment of the present invention. It is a figure which shows the structure of the high-order apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the structure of the data processing part in the high-order apparatus which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<First Embodiment>
The radio base station apparatus notifies the radio terminal apparatus of information about the cell and the neighboring cell that it forms, that is, the frequency of the radio signal and the ID (identification) of the neighboring cell. The wireless terminal device detects and measures neighboring cells based on information notified from the wireless base station device. The wireless terminal device starts moving to the neighboring cell based on the measurement result. Here, “movement” of the wireless terminal device means not only handover but also through which cell the wireless terminal device in an idle state starts communication in the future, that is, when a call or data communication is started. This means selecting whether to perform communication.

  For example, when the wireless terminal device is communicating with the wireless base station device, the destination of the wireless terminal device is determined by the wireless base station device or a higher-level device in the core network. Further, when the wireless terminal device is not communicating with the wireless base station device, the wireless terminal device determines the destination of the wireless terminal device.

  The femtocell and access mode are described in 3GPP (Third Generation Partnership Project) SPEC TS 22.22 as follows. That is, a femto base station is a customer premises apparatus that connects a wireless terminal device connected via a wireless interface to a mobile communication carrier network using an IP backhaul.

  Further, in the femtocell access mode, the femto base station in the closed access mode provides a service only to related CSG (Closed Subscriber Group) members. The hybrid mode femto base station also provides services to the associated CSG members and CSG non-members. The femto base station in the open access mode operates as a normal base station.

  Such a 3GPP definition may also be applied to the wireless communication system according to the first embodiment of the present invention.

  Further, the following definitions can be applied together with or separately from the above definitions.

  The macro base station is a radio base station device that is under the management of the operator and can communicate with the radio base station device that has contracted with the operator. In addition, it is considered that the macro base station is basically not turned off.

  A femto base station is a radio base station apparatus that is installed mainly in an individual or corporate building and may move or be turned off depending on the circumstances of the user.

  FIG. 1 is a diagram illustrating a relationship between an access mode of a femto base station and a connectable wireless terminal apparatus according to the first embodiment of the present invention.

  Referring to FIG. 1, the femto base station according to the first embodiment of the present invention has three access modes. That is, in the closed access mode, only registered wireless terminal apparatuses can be connected to the femto base station. In the open access mode, the wireless terminal devices that can be connected to the femto base station are all wireless terminal devices, which are the same as those of a normal macro base station. In the hybrid mode, all the wireless terminal devices that can be connected to the femto base station are all wireless terminal devices. However, in the hybrid mode, a member, that is, a registered wireless terminal device, may be favored in terms of allocation of a communication resource of the femto base station, charging, and the like, compared to a non-member, that is, a wireless terminal device that is not registered.

  That is, the femto base station according to the first embodiment of the present invention can operate in an open access mode that permits communication for all wireless terminal devices, or can register wireless terminal devices, Operates in a closed access mode that allows communication to registered wireless terminal devices, or can register wireless terminal devices, both registered wireless terminal devices and unregistered wireless terminal devices It is possible to set whether to operate in a hybrid mode that permits communication.

[Configuration and basic operation]
FIG. 2 is a diagram illustrating an arrangement example of radio base station apparatuses in the radio communication system according to the first embodiment of the present invention.

  Referring to FIG. 2, a radio communication system 301 is a mobile communication system according to LTE (Long Term Evolution) standardized by 3GPP, for example, and includes a macro base station 201 and a femto base station (radio base station apparatus) 101A. , 101B, 101C, 101D, a gateway device 203, and a host device 205.

  The macro base station 201 forms a macro cell MC having a radius of several kilometers, for example. In addition, the femto base stations 101A, 101B, 101C, and 101D form femtocells FCA, FCB, FCC, and FCD having a radius of several tens of meters, for example.

  Here, a state in which a plurality of femto base stations exist in a macro cell formed by the macro base station 201 is considered.

  The macro base station 201 can communicate with the wireless terminal device 202 by transmitting and receiving wireless signals to and from the wireless terminal device 202 existing in the macro cell MC.

  The femto base stations 101A, 101B, 101C, and 101D are installed in homes and underground malls, and transmit / receive radio signals to / from the radio terminal devices 202 that exist in the femtocells FCA, FCB, FCC, and FCD, respectively. It is possible to communicate with the device 202.

  The gateway device 203 performs relay processing of various communication data transmitted between the femto base stations 101A, 101B, 101C, and 101D and the host device 205 in the core network 204.

  The host device 205 manages information on the entire wireless communication system 301. For example, the upper device 205 acquires and stores information on each radio base station device in the radio communication system 301.

  In the radio communication system according to the first embodiment of the present invention, the macro base station 201 operates as an adjacent cell processing device. That is, the macro base station 201 optimizes neighboring cell information by itself.

  Hereinafter, each of the femto base stations 101A, 101B, 101C, and 101D may be referred to as a femto base station 101. Further, in FIG. 2, one macro base station and four femto base stations are representatively shown, but a small number or even more macro base stations and femto base stations may be provided.

  FIG. 3 is a diagram illustrating a configuration of the macro base station according to the first embodiment of the present invention. The configuration of the femto base station 101 is the same as that of the macro base station 201, for example.

  With reference to FIG. 3, the macro base station 201 includes an antenna 91, a circulator 92, a radio reception unit 93, a radio transmission unit 94, and a signal processing unit 95. The signal processing unit 95 includes a reception signal processing unit 96 and a transmission signal processing unit 97. The signal processing unit 95 is realized by a CPU (Central Processing Unit) or a DSP (Digital Signal Processor).

  The circulator 92 outputs the radio signal from the radio terminal device 202 received by the antenna 91 to the radio reception unit 93 and outputs the radio signal received from the radio transmission unit 94 to the antenna 91.

  The radio reception unit 93 converts the radio signal received from the circulator 92 into a baseband signal or IF (Intermediate Frequency) signal, converts the frequency-converted signal into a digital signal, and outputs the digital signal to the reception signal processing unit 96.

  The received signal processing unit 96 performs signal processing such as despreading in the CDMA (Code Division Multiple Access) method on the digital signal received from the wireless receiving unit 93, and part or all of the digital signal after this signal processing is performed. The data is converted into a predetermined frame format and transmitted to the host device 205 in the core network 204.

  The transmission signal processing unit 97 performs IFFT (Inverse) in the OFDM (Orthogonal Frequency Division Multiplex) scheme on communication data obtained by converting communication data received from the host device 205 in the core network 204 into a predetermined frame format or communication data generated by itself. Signal processing such as Fast Fourier Transform is performed, and the digital signal after this signal processing is output to the wireless transmission unit 94.

  The radio transmission unit 94 converts the digital signal received from the transmission signal processing unit 97 into an analog signal, converts the frequency of the converted analog signal into a radio signal, and outputs the radio signal to the circulator 92.

  FIG. 4 is a diagram illustrating a configuration of a signal processing unit in the macro base station according to the first embodiment of the present invention.

  Referring to FIG. 4, signal processing unit 95 includes terminal information acquisition unit 11, adjacent cell information generation unit 12, communication system information acquisition unit 13, and adjacent cell information transmission unit 14. The neighboring cell information transmission unit 14 is included in the transmission signal processing unit 97 shown in FIG.

  The terminal information acquisition unit 11 acquires identification information of the wireless terminal device 202 that is communicating with its own macro base station 201.

  The communication system information acquisition unit 13 includes its own macro base station 201, one or more femto base stations 101 arranged around its own macro base station 201, and a wireless terminal device 202 that is a member of the femto base station 101. Communication system information indicating the corresponding relationship is acquired from the higher-level device 205 in the core network 204.

  Based on the communication system information acquired by the communication system information acquisition unit 13 and the identification information acquired by the terminal information acquisition unit 11, the adjacent cell information generation unit 12 is a radio base station device (to which neighbor cell information is provided). Hereinafter, among the plurality of radio base station apparatuses in the radio communication system 301 other than the target base station, one or more radio base station apparatuses that can communicate with the radio terminal apparatus 202 in communication with the target base station are shown. Neighbor cell information is generated. That is, the neighboring cell information generation unit 12 generates neighboring cell information for each wireless terminal device 202 that is communicating with the target base station. In the wireless communication system according to the first embodiment of the present invention, the target base station is its own macro base station 201.

  For example, the neighboring cell information generation unit 12 generates neighboring cell information indicating one or a plurality of radio base station apparatuses that are candidates for a handover destination of the radio terminal apparatus 202 communicating with the target base station.

  The neighboring cell information transmission unit 14 transmits the neighboring cell information generated by the neighboring cell information generation unit 12 to a corresponding wireless terminal device 202 that is communicating with its own macro base station 201.

[Operation]
Next, the operation when the radio base station apparatus according to the first embodiment of the present invention generates neighboring cell information will be described.

  FIG. 5 is a diagram illustrating an example of communication system information in the wireless communication system according to the first embodiment of the present invention.

  Here, in the wireless communication system 301, the cell ID of the macro base station 201 is 1111, the cell IDs of the femto base stations 101A, 101B, 101C, and 101D are 111, 222, 333, and 444, respectively. It is assumed that the IDs of the wireless terminal devices 202A and 202B in communication are 123 and 345, respectively.

  Referring to FIG. 5, the communication system information indicates the following communication system configuration.

  That is, femto base stations 101A, 101B, 101C, and 101D are arranged around the macro base station 201.

  Further, the femto base station 101A is powered on, the access mode is the closed access mode, and the wireless terminal device 202A with ID = 123 as a member is located in the macro cell MC formed by the macro base station 201. The wireless terminal device 202 with ID = 234 as a member is not located in the macro cell MC.

  In addition, the femto base station 101B is powered off, the access mode is the closed access mode, and the wireless terminal device 202A with ID = 123 as a member is located in the macro cell MC formed by the macro base station 201. The wireless terminal device 202B with ID = 345 as a member is located in the macro cell MC.

  Further, the femto base station 101C is powered on and the access mode is the open access mode.

  The femto base station 101D is powered on, the access mode is the closed access mode, and the wireless terminal device 202B with ID = 345 as a member is located in the macro cell MC formed by the macro base station 201, The wireless terminal device 202 with ID = 567 as a member is not located in the macro cell MC.

  Here, that the wireless terminal device 202 is located in a cell means that the wireless base station device that forms the cell is selected as a communication destination and is communicable with the wireless base station device. To do.

  In the case of generating adjacent cell information that is common between the wireless terminal devices 202 that can communicate with the macro base station 201 from the communication system information as shown in FIG. 5, for example, the femto base stations 101A, 101B, and 101C. , 101D, ie, neighboring cell information indicating the cell IDs of 111, 222, 333, and 444 can be considered.

  On the other hand, in the radio communication system according to the first embodiment of the present invention, neighboring cell information is optimized as follows.

  That is, the adjacent cell information generation unit 12 generates adjacent cell information excluding at least wireless base station devices that are turned off from a plurality of wireless base station devices other than the target base station. In addition, the neighboring cell information generation unit 12 selects at least a radio base station apparatus that operates in the closed access mode and the corresponding radio terminal apparatus 202 is not registered from among a plurality of radio base station apparatuses other than the target base station. The excluded neighbor cell information is generated.

  FIG. 6 is a diagram illustrating an example of neighboring cell information generated by the macro base station in the wireless communication system according to the first embodiment of the present invention. FIG. 6 shows neighboring cell information for the wireless terminal device 202A that is one of the wireless terminal devices 202 shown in FIG.

  Referring to FIG. 6, adjacent cell information generation section 12 uses each femto base station indicated in the communication system information of FIG. 5 for notification to radio terminal apparatus 202 </ b> A communicating with its own macro base station 201. 101, the neighboring cell information except for the femto base station 101B that is turned off and the femto base station 101D in the closed access mode in which the wireless terminal device 202A is not a member is generated.

  That is, in the neighboring cell information for the wireless terminal device 202A, the power is turned on and the femto base station 101A in the closed access mode in which the wireless terminal device 202A is a member, and the power is turned on, and The cell IDs 111 and 333 indicating the femto base station 101C operating in the open access mode are registered.

  FIG. 7 is a diagram illustrating an example of neighboring cell information generated by the macro base station in the wireless communication system according to the first embodiment of the present invention. FIG. 7 shows neighboring cell information for the wireless terminal device 202B that is one of the wireless terminal devices 202 shown in FIG. 2 other than the wireless terminal device 202A.

  Referring to FIG. 7, neighboring cell information generation section 12 uses each femto base station indicated in the communication system information of FIG. 5 for notification to radio terminal apparatus 202 </ b> B communicating with its own macro base station 201. 101, adjacent cell information excluding the femto base station 101B that is powered off and the femto base station 101A in the closed access mode in which the wireless terminal device 202B is not a member is generated.

  That is, in the neighboring cell information for the wireless terminal device 202B, the femto base station 101C that is powered on and operates in the open access mode, and the power is turned on, and the wireless terminal device 202B is a member. The cell IDs 333 and 444 indicating the closed access mode femto base station 101D are registered.

  In this way, the neighboring cell information generation unit 12 optimizes neighboring cell information for each wireless terminal device 202. Two cell IDs are registered in the neighboring cell information for the wireless terminal device 202A and the neighboring cell information for the wireless terminal device 202B, respectively.

  FIG. 8 is a diagram showing an exemplary sequence of a handover operation in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 8, first, the macro base station 201 communicates with a frequency to be measured by the wireless terminal device 202A that is communicating with itself, and a measurement cell, that is, another wireless base station device that transmits a radio signal of the frequency. Is set (step S81).

  Next, the macro base station 201 transmits a measurement start request for causing the wireless terminal device 202A to measure the reception level of the wireless signal transmitted from the other set wireless base station device, to the wireless terminal device 202A. This measurement start request includes information on a radio base station apparatus to be measured, that is, a cell ID. This information is, for example, neighboring cell information for the wireless terminal device 202A shown in FIG. Further, the measurement start request includes the transmission frequency of each radio base station apparatus (step S82).

  Next, the wireless terminal device 202A receives the measurement start request from the macro base station 201, and receives the reception level of the wireless signal transmitted from the wireless base station device indicated by the measurement start request at the frequency indicated by the received measurement start request. Is measured (step S83).

  Next, the wireless terminal device 202A transmits a measurement result notification indicating the measurement result of the reception level to the macro base station 201. For example, the wireless terminal device 202A periodically measures the reception level, and when the communication state with the macro base station 201 is deteriorated, and the communication state with other wireless base station devices other than the macro base station 201 is When it becomes better, a measurement result notification is transmitted to the macro base station 201 (step S84).

  Next, the macro base station 201 acquires measurement information indicating the measurement result for each cell ID based on the measurement result notification received from the wireless terminal device 202A, and stores it in a storage unit (not shown) (step S85).

  Note that when the wireless terminal device 202A detects a cell not notified from the macro base station 201, the wireless terminal device 202A may report the detected result of the cell to the macro base station 201.

  Also, the macro base station 201 can instruct the wireless terminal device 202A to detect neighboring cells and measure power at all frequencies by instructing measurement for all frequencies available in the wireless communication system 301. It is.

  Next, the macro base station 201 determines whether or not the wireless terminal device 202A should be handed over based on the measurement result notification received from the wireless terminal device 202A. For example, the femto base station 101A is determined as a handover destination with reference to the adjacent cell information for the wireless terminal device 202A shown, and a handover request indicating the femto base station 101A is transmitted to the host device 205 in the core network 204 (step S86). Note that when the macro base station 201 determines a handover destination based on the measurement result notification received from the wireless terminal device 202A, the operation of referring to the neighboring cell information is unnecessary.

  Here, in the radio communication system according to the first embodiment of the present invention, handover means that a radio base station apparatus that is a communication partner of radio terminal apparatus 202 during a call or data communication is switched. .

  Next, the host device 205 receives the handover request from the macro base station 201 and transmits the handover request to the femto base station 101A (step S87).

  Next, the femto base station 101A receives the handover request from the higher-level device 205, and transmits a handover response to the handover request to the higher-level device 205 (step S88).

  Next, the host device 205 receives a handover response from the femto base station 101A, and transmits a handover instruction to the macro base station 201 (step S89).

  Next, the macro base station 201 receives a handover instruction from the upper apparatus 205 and transmits an RRC connection re-establishment instruction (RRC connection reconfiguration instruction or RRC connection establishment instruction) to the radio terminal apparatus 202A (step S90).

  Next, the macro base station 201 transmits a status notification indicating its own communication status and the like to the higher-level device 205 (step S91).

  Next, the higher-level device 205 receives the status notification from the macro base station 201, and transmits a status notification indicating communication contents and the like with the wireless terminal device 202A to the femto base station 101A (step S92).

  When the RRC connection is established between the wireless terminal device 202A and the femto base station 101A, the wireless terminal device 202A transmits an RRC connection establishment notification to the femto base station 101A (step S93). Here, the RRC (Radio Resource Control) connection is a process for the wireless terminal apparatus 202A to start communication with the macro base station 201.

  Next, the femto base station 101A receives the RRC connection establishment notification from the wireless terminal device 202A and transmits a handover completion notification to the higher-level device 205 (step S94).

  Next, the upper device 205 receives a handover completion notification from the femto base station 101A, and transmits a terminal information release instruction to the macro base station 201 (step S95).

  Next, the macro base station 201 receives a terminal information release instruction from the higher-level device 205, releases information related to the wireless terminal device 202A, and transmits a terminal information release completion notification to the higher-level device 205 (step S96).

[Notification of neighboring cell information]
The macro base station 201 generates and updates neighboring cell information when communication with a new wireless terminal device 202 is started or communication system information is updated. Then, the generated or updated neighboring cell information needs to be notified to the corresponding wireless terminal device 202. That is, the neighboring cell information transmitting unit 14 in the macro base station 201 uses the neighboring cell information generated by the neighboring cell information generating unit 12 as a corresponding wireless terminal device 202 that is communicating with its own macro base station 201 that is the target base station. Send to. As this notification method, for example, the following two methods are conceivable.

  FIG. 9 is a diagram illustrating an example of a method in which a wireless base station device notifies neighboring cell information to a wireless terminal device in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 9, for example, in LTE, macro base station 201 notifies neighboring cell information to radio terminal apparatus 202 that performs RRC connection establishment processing when setting up a radio data link.

  More specifically, first, various control processes in the previous stage of transmitting / receiving communication data such as link setting of a wireless control signal, that is, IP (Internet Protocol) packet, are performed between the wireless terminal device 202 and the macro base station 201 (steps). S31).

  Next, NAS (Non-Access Stratum) layer security processing, that is, transmission / reception of information necessary for communication encryption is performed between the wireless terminal device 202 and the macro base station 201 (step S32). For example, in LTE, the wireless terminal device 202 exchanges the information with the host device 205 in the core network 204, and the macro base station 201 plays a role of relaying the information.

  Next, a wireless data link is set between the wireless terminal device 202 and the macro base station 201, and thereafter communication data such as IP packets is transmitted and received between the wireless terminal device 202 and the macro base station 201. Further, the macro base station 201 transmits a measurement start request for causing the wireless terminal device 202 to measure the reception level of the wireless signal transmitted from another wireless base station device (step S33). For example, in LTE, the measurement start request is included in the wireless data link setting request notified from the macro base station 201 to the wireless terminal device 202. The measurement start request includes neighboring cell information.

  Next, the wireless terminal device 202 receives the measurement start request from the macro base station 201, updates the neighbor cell information held by itself to the newly notified neighbor cell information, and updates the neighbor cell information of the updated neighbor cell information. The reception level of the radio signal transmitted from the indicated radio base station apparatus is measured (step S34).

  FIG. 10 is a diagram illustrating an example of a method in which the wireless base station device notifies the wireless terminal device of neighboring cell information in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 10, the macro base station 201 notifies the wireless terminal device 202 communicating with itself of the update of the neighboring cell information using the measurement change request.

  More specifically, when optimization of neighboring cell information occurs (step S27), the macro base station 201 includes the updated neighboring cell information in a measurement change request and transmits the measurement change request to the wireless terminal device 202 (step S41).

  Next, the wireless terminal device 202 changes the neighboring cell information held by itself to the neighboring cell information included in the measurement change request received from the macro base station 201, and the wireless base station device indicated by the changed neighboring cell information The reception level of the radio signal transmitted from is measured (step S42).

[Generation of communication system information]
The communication system information illustrated in FIG. 5 is information indicating a correspondence relationship between the macro base station 201, the femto base station 101, and the wireless terminal device 202. In the radio communication system according to the first embodiment of the present invention, such communication system information is generated by the following method.

  First, as a method of acquiring information indicating the femto base station 101 and the wireless terminal device 202, that is, a method of acquiring information indicating the femto base station 101 and the wireless terminal device 202 permitted to access the femto base station 101, for example, (Method 1) There are three methods: (Method 2) acquired by the femto base station 101, (Method 3) acquired by the higher-level device 205, acquired by the wireless terminal device 202.

  As a method 1, for example, in LTE, the wireless terminal device 202 recognizes a subscriber group to which the wireless terminal device 202 belongs, that is, its own CSG ID, and accesses the femto base station 101 having the same CSG ID. Here, the CSG ID is reported from the femto base station 101. As a result, the higher-level device 205 acquires information indicating the correspondence relationship between the femto base station 101 and the wireless terminal device 202 via the femto base station 101.

  Here, for example, when the user inputs the identification number of the accessible femto base station 101 to the wireless terminal device 202, the wireless terminal device 202 recognizes the subscriber group to which the wireless terminal device belongs, that is, its own CSG ID.

  As a method 2, a user who installs the femto base station 101 allows access to the femto base station 101, that is, inputs the identification number of the wireless terminal device 202 that is a member of the femto base station 101 to the femto base station 101. To do. As a result, the higher-level device 205 acquires information indicating the correspondence relationship between the femto base station 101 and the wireless terminal device 202 via the femto base station 101.

  As a method 3, the user who installs the femto base station 101 may, for example, send an identification number of the femto base station 101 to a mobile communication provider at the time of purchase or to a mobile communication provider through a website after purchase, And the access number to the femto base station 101 is permitted, that is, the identification number of the wireless terminal device 202 that is a member of the femto base station 101 is notified. As a result, the higher-level device 205 acquires information indicating the correspondence relationship between the femto base station 101 and the wireless terminal device 202 via the mobile communication carrier. In this way, in LTE, the host device 205 holds a list of wireless terminal devices 202 that are permitted to access the femto base station 101.

  Next, as a method for acquiring information indicating the macro base station 201 that forms a macro cell including part or all of the femto cell formed by the femto base station 101, for example, as a result of binding the macro base station 201 and the femto base station 101, for example, (Method A) There are three methods: obtaining via the femto base station 101, (method B) obtaining using the location information of the femto base station 101, and (method C) obtaining using the measurement information. .

  In the method A, the communication system information is generated based on the identification information of the radio base station device and the identification information of the target base station, which are notified from the radio base station device other than the target base station that detected the target base station. .

  Specifically, for example, the sniffer function of the femto base station 101 is used. That is, the femto base station 101 receives a radio signal from the macro base station 201, and refers to broadcast information included in the received radio signal, so that a macro cell including a part or all of the femto cell formed by itself is obtained. The macro base station 201 to be formed is detected.

  Here, in a situation where a plurality of other femto base stations 101 are installed in a place quite close to the femto base station 101, these other femto base stations 101 are also detected. In this case, when the detected femto base station 101 operates in the closed access mode or the hybrid mode, it is distinguished from the macro base station 201 by the CSG ID or the like indicated by the broadcast information from the detected femto base station 101. Is possible. However, it is possible to determine whether the detected radio base station apparatus is the femto base station 101 or the macro base station 201 without discrimination using the CSG ID in this way. There are many cases.

  In the method B, the communication system information includes the identification information of the target base station acquired based on the position information indicating the installation location of the radio base station apparatus other than the target base station, and the radio base station apparatus corresponding to the position information. Generated based on the identification information.

  Specifically, when the femto base station 101 can identify the current location using GPS (Global Positioning System) or the like, the higher-level device 205 determines the geographically close macro base station from the position information of the femto base station 101. 201 information is acquired.

  In consideration of the case where the femto base station 101 installed indoors cannot use GPS, the following method is adopted instead of or in combination with the GPS method. That is, the user who installs the femto base station 101 notifies the mobile communication carrier of the installation location of the femto base station 101 at the time of purchase, or to the mobile communication carrier through a website after purchase. . As a result, the higher-level device 205 acquires the position information of the femto base station 101 via the mobile communication carrier, and acquires the information of the macro base station 201 that is geographically close.

  As a method C, when the femto base station 101 is installed, the mobile communication carrier measures the radio wave condition, thereby specifying the macro base station 201 that is geographically close to the femto base station 101. Thereby, the higher-level device 205 acquires information on the macro base station 201 via the mobile communication carrier.

  Or the radio | wireless terminal apparatus 202 located in the vicinity of the femto base station 101 measures the radio signal from each radio base station apparatus, detects the macro base station 201 from the measurement result, and the identification information of the detected macro base station 201 To the femto base station 101. As a result, the higher-level device 205 acquires information on the macro base station 201 via the femto base station 101.

  As described above, in the wireless communication system according to the first embodiment of the present invention, communication method information can be generated by combining any of Method 1 to Method 3 and any of Method A to Method C. It becomes possible.

[Get Power Status]
Moreover, in the radio | wireless communications system which concerns on the 1st Embodiment of this invention, the information of the power supply state of the femto base station 101 in communication system information is acquired with the following methods.

  That is, when the wireless terminal device 202 enters the macro cell formed by the macro base station 201, the macro base station 201 designates the femto base station 101 that permits access to the wireless terminal device 202 for the wireless terminal device 202. It is included in the neighboring cell information of and notified. At this time, more appropriate neighboring cell information can be generated by considering the power state of the femto base station 101 included in the neighboring cell information.

  For example, the femto base station 101 whose power is turned off by managing the power state of the femto base station 101, for example, the connection state of the femto base station 101 to the host device 205, as in the following method α and method β. Can be prevented from being added to neighboring cell information.

  In the method α, the neighboring cell information generation unit 12 supplies power to one or more radio base station apparatuses with which the new radio terminal apparatus 202 can communicate when the new radio terminal apparatus 202 starts communication with the target base station. The power supply information indicating whether is turned on or off is acquired. Then, the neighboring cell information generation unit 12 generates neighboring cell information excluding at least the wireless base station device whose power is turned off as the neighboring cell information for the new wireless terminal device 202.

  That is, when the wireless terminal device 202 enters the macro cell formed by the macro base station 201, the macro base station 201 designates the femto base station 101 that permits access to the wireless terminal device 202 for the wireless terminal device 202. Before being included in the neighboring cell information, the power state of the femto base station 101 is confirmed. When the femto base station 101 is powered off, for example, when the upper device 205 cannot detect the femto base station 101, the femto base station 101 is added to the neighboring cell information for the wireless terminal device 202. exclude.

  In the method β, communication system information is generated based on power supply information that is notified from a radio base station apparatus other than the target base station and that indicates whether the power supply of the radio base station apparatus is turned on or off.

  That is, when the power is turned on, the femto base station 101 notifies the higher level device 205 that the power is turned on. Further, when the power is turned off, the femto base station 101 notifies the higher level device 205 that the power is turned off.

  As a result, the higher-level device 205 can manage the power state of each subordinate femto base station 101.

  The communication system information may be generated based on power supply information that is periodically notified from a radio base station apparatus other than the target base station and that indicates that the power supply of the radio base station apparatus is turned on.

  That is, the femto base station 101 may be configured to periodically notify the higher level device 205 that its own power is on while the power is on. As a result, it is possible for the host device 205 to detect the power-off due to the occurrence of an abnormality in the femto base station 101, such as an unplugged outlet or a LAN (Local Area Network) cable.

  Next, a more specific example of the method for acquiring the power state of the base station in the communication system information will be described. Here, each of the femto base station 101 and the macro base station 201 is simply referred to as a base station.

  First, a method for notifying the power state of a base station using an X2 interface that is a logical inter-base station interface in LTE will be described. Each base station exchanges various information with each other via the X2 interface by transmitting and receiving communication data according to the X2 interface to each other via the gateway device 203 or the host device 205, for example.

  In the wireless communication system 301, a base station A notifies its own power supply state transition to another base station B via the X2 interface.

  More specifically, the base station A establishes an X2 interface with itself when it starts, that is, when the power changes from off to on, or when it ends, that is, when the power changes from on to off. By transmitting a power supply transition notification message to the station B, the base station B is notified of a change in the power state.

  FIG. 11 is a diagram illustrating an example of a power supply transition notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 11, this power transition notification message indicates, for example, whether the base station is activated, that is, transitioned from a power-off state to a power-on state, or whether the base station is terminated, that is, transitioned from a power-on state to a power-off state. It is a message to show.

  Also, in the wireless communication system 301, the base station A that generates neighboring cell information transmits a power state notification request message to another base station B that has established an X2 interface with itself, thereby A configuration in which B is inquired about the power supply state may be employed. When the power of the base station B is off, the base station A can determine that the power of the base station B is turned off because there is no response from the base station B.

  FIG. 12 is a diagram illustrating an example of a power state notification request message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 12, this power status notification request message is, for example, a message indicating the presence or absence of a power status notification request.

  When the base station B that is powered on receives the power state notification request message as described above, the base station B transmits the power state notification message to the base station A, thereby changing its power state to the base station. Notify A.

  FIG. 13 is a diagram illustrating an example of a power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 13, this power state notification message is, for example, whether the base station is activated, i.e., has transitioned from the power off state to the power on state, or has been terminated, i.e., has transitioned from the power on state to the power off state, This message indicates whether the base station is in a power-on state or whether the base station is in a power-off state.

  In addition, when the base station B receives the power state notification request message as described above, the base station B transmits the following power state notification message to the base station A, so that in addition to its own power state, The base station A may be notified of its own load status and the number of connected terminals, that is, the number of wireless terminal devices 202 communicating with itself.

  FIG. 14 is a diagram illustrating another example of the power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 14, this power status notification message includes, for example, the power status of the base station, the load status of “high”, “medium”, and “low” and the wireless terminal device 202 that is talking over itself. This is a message indicating the number.

  Each base station may transmit and receive each message alone or may be transmitted and received together with a message conforming to another X2 interface.

  Here, when the load on the base station is large, or when the number of connected terminals of the base station reaches the maximum connectable number of the base station, the base station communicates with a new wireless terminal device. I can't. If such a base station that is not suitable as a handover destination is registered in the neighboring cell information, the wireless terminal device performs a useless measurement operation, and a useless handover occurs, and the battery power of the wireless terminal device Will be wasted.

  Therefore, in the wireless communication system according to the first embodiment of the present invention, a base station is wasteful by a configuration in which its own power status and its load status and the number of connected terminals are notified to other base stations in advance. Measurement operation and handover operation can be prevented.

  Next, a method for notifying the power state of the base station using the S1 interface that is a logical base station-provider network interface in LTE will be described.

  Each base station exchanges various pieces of information with each other via the S1 interface by transmitting and receiving communication data according to the S1 interface to and from the host device 205, which is an MME, for example.

  In the wireless communication system 301, a certain base station A notifies its own power supply state transition to, for example, the MME 205 via the S1 interface.

  When the base station A starts, that is, when the power changes from off to on, or when it ends, that is, when the power changes from on to off, the base station A transmits a power status notification message to the MME 205, for example. Notify changes in power status.

  FIG. 15 is a diagram illustrating an example of a power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 15, this power status notification message includes, for example, a transmission source base station identifier such as a cell global ID, a transmission destination base station list which is an identifier list such as a cell global ID of a transmission destination base station, and a base station. Is a message indicating the power state indicating whether the base station has been started, i.e., has transitioned from the power-off state to the power-on state, or has terminated, i.e., has transitioned from the power-on state to the power-off state.

  Note that the symbol “>” in the following drawings including FIG. 15 means that the information with the symbol is a member of a list or the like described above the information in the drawing.

  Specifically, FIG. 15 shows that a collection of transmission destination base station identifiers is a transmission destination base station list, that is, a plurality of transmission destination base station identifiers are members of the transmission destination base station list. Has been.

  The MME 205 receives such a power state notification message from the base station A, and transmits the power state notification message to each base station B listed in the transmission destination base station list via the S1 interface.

  In some cases, the transmission destination of the power status notification message may be determined by the determination of the MME 205. For example, when the base station identifier is not listed in the transmission destination base station list, the MME 205 determines the transmission destination of the power status notification message.

  In the wireless communication system 301, the base station A that generates neighboring cell information inquires the power state of another base station B by transmitting a power state notification request message to the MME 205, for example. There may be.

  FIG. 16 is a diagram illustrating an example of a power state notification request message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 16, this power status notification request message includes, for example, a transmission source base station identifier such as a cell global ID, a transmission destination base station list which is an identifier list such as a cell global ID of a transmission destination base station, and a power supply. This is a message indicating the presence / absence of a status notification request.

  The MME 205 receives such a power state notification request message from the base station A, and transmits the power state notification request message to each base station B listed in the transmission destination base station list via the S1 interface.

  In some cases, the transmission destination of the power status notification request message may be determined by the determination of the MME 205. For example, when the base station identifier is not listed in the transmission destination base station list, the MME 205 determines the transmission destination of the power status notification request message.

  When the power of the base station B is off, the MME 205 can determine that the power of the base station B is turned off because there is no response from the base station B.

  In addition, when the base station B that is powered on receives the power status notification request message as described above, the base station B transmits the power status notification message to the base station A, thereby changing its power status via the MME 205. To the base station A.

  FIG. 17 is a diagram illustrating an example of a power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 17, this power status notification message includes, for example, a source base station identifier such as a cell global ID, a destination base station identifier such as a cell global ID, and the base station is activated, ie, powered on from a power off state. This message is a message indicating whether the state has changed, the base station has ended, i.e., has changed from the power-on state to the power-off state, the base station is in the power-on state, or the base station is in the power-off state.

  The MME 205 receives such a power state notification message from the base station B, and transmits the power state notification message to the base stations A listed in the transmission destination base station list via the S1 interface.

  In addition, when the base station B receives the power status notification request message as described above, the base station B transmits the following power status notification message to the MME 205, thereby adding the current self status to the current self status. The base station A may be notified via the MME 205 of the load status and the number of connected terminals, that is, the number of wireless terminal devices 202 communicating with itself.

  FIG. 18 is a diagram illustrating another example of the power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 18, this power status notification message includes, for example, a load status of “high”, “medium”, and “low” in addition to the source base station identifier, the destination base station identifier, and the power status of the base station. This is a message indicating the number of wireless terminal devices 202 that are in a call via self.

  Each base station may transmit and receive each of the above messages alone or may be transmitted and received together with messages according to other S1 interfaces.

  Alternatively, the MME 205 may have a database in which the state of each base station is registered, and manage the power state of each base station. In this case, when a certain base station A makes an inquiry to the MME 205, the MME 205 sends a base station power state notification message to the base station A, thereby notifying the power state and the like of the other base station B.

  FIG. 19 is a diagram illustrating another example of the base station power state notification message in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 19, this base station power status notification message includes, for example, a base station identifier such as a cell global ID for each base station, whether the base station is activated, i.e. The power status of whether the station is terminated, i.e., from the power-on state to the power-off state, the base station is in the power-on state, or the base station is in the power-off state, "high" "medium" "low" load This is a message indicating the situation and the number of wireless terminal devices 202 that are in a call via self.

  By the way, the purchaser of the femto base station can uniquely determine the installation location of the femto base station. For this reason, in a radio communication system in which a femto base station is installed, the femto base station is likely to move and the power is turned on / off. Therefore, appropriate neighboring cell information in the radio base station apparatus in which the femto base station exists in the vicinity. It becomes difficult to generate.

  For example, the wireless terminal device measures the received power from the femto base station registered in the neighboring cell information autonomously or in accordance with an instruction from the femto base station using the neighboring cell information, and uses the measurement result. Report to femto base station. In this case, when a femto base station that is not suitable as a handover destination, such as a closed access mode femto base station in which the wireless terminal device is not registered or a power-off femto base station, is registered in the neighboring cell information. The wireless terminal device performs a useless measurement operation, and a useless handover occurs.

  Further, as the number of femto base stations 101 to be installed increases and the number of femto base stations registered in the neighboring cell information increases, the transmission band of the macro base station 201 for transmitting neighboring cell information increases, and Since the transmission time becomes longer, interference with other radio base station devices and other radio terminal devices 202 around the macro base station 201 increases. In addition, the wireless terminal device 202 that receives neighboring cell information also receives a large amount of data, which increases power consumption.

  On the other hand, if the number of radio base station apparatuses registered in the neighboring cell information is simply reduced, handover of the radio terminal apparatus 202 may not be performed properly.

  On the other hand, in the radio communication system according to the first embodiment of the present invention, the neighboring cell information generation unit 12 is communicating with the target base station among a plurality of radio base station apparatuses other than the target base station. Neighbor cell information indicating one or a plurality of radio base station apparatuses with which the radio terminal apparatus 202 can communicate is generated for each radio terminal apparatus 202 in communication with the target base station. Then, the neighboring cell information transmission unit 14 transmits the neighboring cell information generated by the neighboring cell information generation unit 12 to the corresponding wireless terminal device 202.

  As described above, the neighboring cell information is generated for each wireless terminal device 202 in communication with the target base station, and the wireless terminal device 202 that can communicate with the wireless terminal device 202 is included in the neighboring cell information. Can be prevented from performing a useless measurement operation, and the occurrence of useless handover can be suppressed. Moreover, since an inappropriate radio base station apparatus is not included in the neighboring cell information, an increase in the transmission band of the macro base station 201 for transmitting neighboring cell information is suppressed, and the transmission time is shortened. Thus, interference with other radio base station devices and other radio terminal devices 202 around the target base station can be reduced. Also, the wireless terminal device 202 that receives neighboring cell information does not need to receive data with a large capacity, and an increase in power consumption can be prevented. Further, inappropriate reduction of the radio base station devices included in the neighboring cell information can be prevented, and handover of the radio terminal device 202 can be appropriately performed.

  In addition, since the neighboring cell information can be automatically optimized regardless of the movement of the femto base station and the power on / off, the operation of the wireless communication system 301 can be made more efficient without human intervention. be able to. In addition, since the neighboring cell information is automatically optimized, a special installation process for the radio base station apparatus is not required, so that the work time and cost for installing the radio base station apparatus can be reduced. Can do.

  Therefore, in the radio communication system according to the first embodiment of the present invention, it is possible to improve the efficiency of operation in the radio communication system by generating appropriate neighboring cell information.

  Further, in the radio communication system according to the first embodiment of the present invention, the neighboring cell information generation unit 12 is a radio base station whose power is turned off from among a plurality of radio base station apparatuses other than the target base station. Neighbor cell information excluding at least the device is generated.

  As described above, in the radio communication system according to the first embodiment of the present invention, the power on / off of the femto base station 101 is set as a registration condition for the neighboring cell information of the femto base station 101. That is, the configuration in which the femto base station 101 that is turned off is excluded from the neighboring cell information can eliminate the femto base station 101 that the wireless terminal device 202 cannot communicate with from the neighboring cell information. Can prevent the handover operation and the measurement operation.

  Further, in the radio communication system according to the first embodiment of the present invention, the neighboring cell information generation unit 12 operates in the closed access mode from among a plurality of radio base station apparatuses other than the target base station, and supports The neighboring cell information excluding at least the wireless base station device to which the wireless terminal device 202 is not registered is generated.

  As described above, in the wireless communication system according to the first embodiment of the present invention, whether or not the wireless terminal device 202 is permitted to access the femto base station 101 is determined by neighboring cell information of the femto base station 101. Registration conditions. That is, since the femto base station 101 that is not permitted to access the wireless terminal device 202 is excluded from the neighboring cell information, the femto base station 101 that the wireless terminal device 202 cannot communicate with can be excluded from the neighboring cell information. It is possible to prevent unnecessary handover operation and measurement operation by the apparatus 202.

  In the radio communication system according to the first embodiment of the present invention, the communication system information acquisition unit 13 includes one or more radio base station devices and one or more radios arranged around the target base station. Communication system information indicating a correspondence relationship between one or a plurality of wireless terminal apparatuses 202 capable of communicating with the base station apparatus is acquired. Then, the neighboring cell information generation unit 12 generates neighboring cell information based on the communication system information acquired by the communication system information acquisition unit 13.

  With such a configuration, it is possible to generate optimal neighboring cell information based on the configuration of the wireless communication system 301.

  In the radio communication system according to the first embodiment of the present invention, the communication system information is notified from a radio base station apparatus other than the target base station that detected the target base station, and the identification of the radio base station apparatus It is generated based on the information and identification information of the target base station.

  With such a configuration, it is possible to construct appropriate communication system information, and it is possible to further improve the efficiency of the operation in the wireless communication system 301.

  Further, in the wireless communication system according to the first embodiment of the present invention, the communication system information is the identification of the target base station acquired based on the position information indicating the installation location of the wireless base station device other than the target base station. It is generated based on the information and the identification information of the radio base station apparatus corresponding to the position information.

  With such a configuration, it is possible to construct appropriate communication system information, and it is possible to further improve the efficiency of the operation in the wireless communication system 301.

  Further, in the radio communication system according to the first embodiment of the present invention, the neighboring cell information generation unit 12 performs the new radio terminal device 202 when the new radio terminal device 202 starts communication with the target base station. Obtains power information indicating whether one or a plurality of radio base station apparatuses capable of communicating is turned on or off. Then, the neighboring cell information generation unit 12 generates neighboring cell information excluding at least the wireless base station device whose power is turned off as the neighboring cell information for the new wireless terminal device 202.

  As described above, it is possible to generate appropriate neighboring cell information by determining whether or not to register the femto base station 101 in the neighboring cell information after grasping the latest power state of the femto base station 101. It becomes.

  In the radio communication system according to the first embodiment of the present invention, the communication system information is notified from the radio base station apparatus other than the target base station, and the power supply of the radio base station apparatus is turned on or off. It is generated based on the power supply information indicating that.

  With such a configuration, the power state of the femto base station 101 can be acquired and reflected in the communication system information, and appropriate neighboring cell information can be generated.

  Further, in the radio communication system according to the first embodiment of the present invention, communication system information is periodically notified from radio base station apparatuses other than the target base station, and the radio base station apparatus is powered on. It is generated based on the power supply information indicating that the

  With such a configuration, the power state of the femto base station 101 can be acquired and reflected in the communication system information, and appropriate neighboring cell information can be generated. In addition, it is possible to detect power-off due to the occurrence of an abnormality in the femto base station 101.

  In the radio communication system according to the first embodiment of the present invention, the communication system information acquisition unit 13 acquires communication system information from the higher-level device 205 that stores information of each radio base station device in the radio communication system 301. To do.

  As described above, the radio base station apparatus acquires the communication system information from the host apparatus 205 that manages the information of the entire radio communication system 301, thereby efficiently generating adjacent cell information as the entire radio communication system 301. Is possible.

  Further, when the femto base station is automatically set using the technique described in Patent Document 1, all of the neighboring femto base stations are treated as neighboring cells and registered in neighboring cell information, which is a candidate for a handover destination. For this reason, there is a possibility that a femto base station that is not originally suitable for a handover destination may be registered in the neighboring cell information, such as a femto base station existing on the other side of the wall with respect to the wireless terminal device.

  On the other hand, in the radio communication system according to the first embodiment of the present invention, the neighboring cell information generation unit 12 is a radio that communicates with the target base station among a plurality of radio base station apparatuses other than the target base station. Neighbor cell information indicating one or a plurality of radio base station devices that are candidates for the handover destination of the terminal device 202 is generated.

  With such a configuration, it is possible to optimize the handover operation in the cell of the installed radio base station apparatus. Further, by optimizing the neighboring cell information, the number of neighboring cells that are handover destination candidates for the wireless terminal device 202 in communication can be reduced, so that it is possible to prevent unnecessary handover from occurring. .

  Moreover, in the radio | wireless communications system which concerns on the 1st Embodiment of this invention, the adjacent cell information generation part 12 becomes a measuring object of the radio | wireless terminal apparatus 202 among several radio base station apparatuses other than an object base station. Alternatively, neighboring cell information indicating a plurality of radio base station apparatuses is generated.

  Thus, by optimizing the neighboring cell information, the number of neighboring cells to be measured by the wireless terminal device 202 can be reduced, so that the wireless terminal device 202 performs a useless measurement operation. Can be prevented.

  Moreover, in the radio | wireless communications system which concerns on the 1st Embodiment of this invention, the adjacent cell information production | generation part 12 uses the radio | wireless terminal apparatus 202 among several radio base station apparatuses other than a object base station, and measures a reception level. Neighboring cell information indicating one or a plurality of radio base station apparatuses that transmit a target radio signal is generated.

  As described above, by optimizing the neighboring cell information, the number of neighboring cells for which the wireless terminal device 202 performs reception level measurement can be reduced, so that the wireless terminal device 202 performs a useless measurement operation. Can be prevented.

  In the radio communication system according to the first embodiment of the present invention, at least one of the plurality of radio base station apparatuses other than the target radio base station is a femto base station.

  In this way, appropriate neighboring cell information is generated in a radio base station apparatus in which a femto base station capable of setting access restrictions is arranged in the vicinity, with frequent power on / off and cell movement. Thus, the effect of increasing the efficiency of the operation in the wireless communication system can be obtained more remarkably.

  Further, in the radio communication system according to the first embodiment of the present invention, macro base station 201 optimizes neighboring cell information by itself. That is, the neighboring cell processing apparatus according to the first embodiment of the present invention is included in the macro base station 201.

  With such a configuration, for example, it is not necessary for the host device 205 in the core network 204 to optimize the neighboring cell information of each radio base station device, and the processing load in the radio communication system 301 can be distributed, and the radio base station device and the host The amount of communication between devices can be reduced.

  Further, in the radio communication system according to the first embodiment of the present invention, the power transition notification message shown in FIG. 11 and the power status notification message shown in FIG. 13 and FIG. 14 are notified between base stations. Power state data indicating the power state is provided.

  With such a configuration, for example, it is possible to notify the power state between base stations using a logical inter-base station interface, which can contribute to generation of appropriate neighboring cell information.

  Further, in the wireless communication system according to the first embodiment of the present invention, as described in FIG. 15, FIG. 17, and FIG. 18, the power status notification message is transmitted to one or a plurality of base stations and each base station. Source base station identification data that is notified between the communicable host devices 205 and indicates the identification information of the base station that is the information transmission source, and power state data that indicates the power status of the base station that is the information transmission source Prepare.

  With such a configuration, for example, it is possible to notify the power supply state between the base stations via the host device using a logical base station-provider network interface, which contributes to generation of appropriate neighboring cell information. Can do.

  Further, in the radio communication system according to the first embodiment of the present invention, as described in FIG. 19, the base station power status notification message is transmitted from the host apparatus 205 that can communicate with one or more base stations to each base station. Base station identification data notified to the station and indicating the identification information of the base station, and power state data indicating the power state of the base station corresponding to the identification information.

  With such a configuration, it becomes possible to notify the base station of the power supply state from the higher-level device 205, which can contribute to generation of appropriate neighboring cell information.

  Further, in the wireless communication system according to the first embodiment of the present invention, the power supply transition notification message shown in FIG. 11, the power supply state notification messages shown in FIGS. 13 to 15, 17 and 18, and FIG. 19 are shown. Like the base station power status notification message, the power status data indicates whether the power of the base station has transitioned from on to off or from off to on.

  With such a configuration, when the power state of a certain base station transitions, it becomes possible to acquire information related to the transition in another base station.

  Further, in the radio communication system according to the first embodiment of the present invention, like the power status notification message shown in FIG. 13, FIG. 14, FIG. 17 and FIG. 18, and the base station power status notification message shown in FIG. The power status data indicates whether the power of the base station is on or off.

  With such a configuration, it becomes possible to periodically acquire the power state of a certain base station, for example.

  Further, in the wireless communication system according to the first embodiment of the present invention, the power status notification message shown in FIGS. 14 and 18 and the base station power status notification message shown in FIG. 19 are loads indicating the load status of the base station. It includes status data and communicating terminal number data indicating the number of wireless terminal devices 202 communicating with the base station.

  With this configuration, a base station can notify other base stations in advance of its own power status as well as its own load status and the number of connected terminals, thereby preventing unnecessary measurement operations and handover operations. it can. In addition, if these messages indicate at least one of the load status data and the number-of-communications terminal data, it is possible to achieve an effect of preventing useless measurement operation and handover operation.

  Further, in the radio communication system according to the first embodiment of the present invention, as described in FIG. 12, the power status notification request message is notified between base stations, and the power status notification is sent to the base stations. Power supply state notification request data indicating a request is provided.

  With such a configuration, it becomes possible to request notification of the power supply state from one base station to another base station autonomously, which can contribute to generation of appropriate neighboring cell information.

  Further, in the wireless communication system according to the first embodiment of the present invention, as described in FIG. 16, the power state notification request message is transmitted to one or a plurality of base stations, and a higher-level device capable of communicating with each base station. 205, transmission source base station identification data indicating the identification information of the base station that is the information transmission source, and power state notification request data indicating that a request for power state notification is requested to another base station, Is provided.

  With such a configuration, it becomes possible to request a notification of the power state from another base station to another base station autonomously via the higher-level device 205, which can contribute to generation of appropriate neighboring cell information.

  In the radio communication system according to the first embodiment of the present invention, the power status notification message shown in FIG. 15, FIG. 17 and FIG. 18, and the power status notification request message shown in FIG. Transmission destination base station identification data indicating identification information of one or a plurality of base stations is provided.

  With such a configuration, it is not necessary to determine the message transmission destination in the host apparatus 205, and the processing load in the host apparatus 205 can be reduced.

  In the wireless communication system according to the first embodiment of the present invention, only the femto base station 101 is registered in the neighboring cell information generated by the macro base station 201. However, the present invention is limited to this. It is not a thing. When a plurality of macro base stations are installed in a wireless communication system, another macro base station may be registered in adjacent cell information generated by a certain macro base station.

  In the radio communication system according to the first embodiment of the present invention, the macro base station 201 is configured to generate neighboring cell information. However, the present invention is not limited to this. The femto base station 101 may be configured to generate neighboring cell information.

  In the radio communication system according to the first embodiment of the present invention, the communication system information acquisition unit 13 in the macro base station 201 is configured to acquire communication system information from the higher-level device 205. It is not limited. The communication system information acquisition unit 13 in the macro base station 201 may generate communication system information by itself.

  Further, in the radio communication system according to the first embodiment of the present invention, as a handover operation, the radio base station apparatus that is a communication partner of radio terminal apparatus 202 is configured to be switched by the radio base station apparatus. However, the present invention is not limited to this. The wireless base station device that is the communication partner of the wireless terminal device 202 may be configured to be switched by the wireless terminal device 202.

  In the radio communication system according to the first embodiment of the present invention, the power status notification message shown in FIGS. 13, 14, 17 and 18 and the base station power status notification message shown in FIG. Whether the station has started, i.e. transitioned from a power-off state to a power-on state, the base station has terminated, i.e., has transitioned from a power-on state to a power-off state, the base station is in a power-on state, The message indicating whether or not there is a message is not limited to this. These messages do not indicate power state transition, and may simply be messages indicating whether the base station is in a power-on state or whether the base station is in a power-off state.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a radio communication system that broadcasts neighboring cell information compared to the radio communication system according to the first embodiment. The contents other than those described below are the same as those of the wireless communication system according to the first embodiment.

  FIG. 20 is a diagram illustrating a configuration of a signal processing unit in the macro base station according to the second embodiment of the present invention.

  Referring to FIG. 20, the signal processing unit in macro base station 201 includes an adjacent cell information generation unit 32, a communication system information acquisition unit 13, and an adjacent cell information transmission unit 34.

  Based on the communication system information acquired by the communication system information acquisition unit 13, the neighboring cell information generation unit 32 is located in the macro cell MC and is in an idle state, that is, each wireless terminal not communicating with its own macro base station 201. Neighbor cell information for notification to the device 202 is created.

  The neighboring cell information transmission unit 34 notifies the neighboring cell information generated by the neighboring cell information generation unit 32 to the wireless terminal device 202 that can communicate with its own macro base station 201 that is the target base station.

  FIG. 21 is a diagram illustrating an example of neighboring cell information generated by the macro base station in the wireless communication system according to the second embodiment of the present invention.

  Referring to FIG. 21, the neighboring cell information generation unit 32 is based on the communication system information shown in FIG. 5, for notification to each wireless terminal device 202 that is in idle state, that is, not communicating with its own macro base station 201. Neighbor cell information indicating the cell IDs of the femto base stations 101A, 101C, and 101D that are turned on, that is, 111, 333, and 444, is generated.

  With such a configuration, it is possible to prevent a useless measurement operation for the femto base station 101 that is powered off from occurring in the wireless terminal device 151 in the idle state.

  FIG. 22 is a flowchart defining an operation procedure when the macro base station according to the second embodiment of the present invention updates neighboring cell information.

  With reference to FIG. 22, the neighboring cell information generation unit 32 waits until the communication system information is updated by the communication system information acquisition unit 13 and the neighboring cell information needs to be updated by updating the communication system information ( NO in step S1, NO in step S2).

  And the adjacent cell information generation part 32 is a case where communication system information is updated (it is YES at step S1), and when adjacent cell information needs to be updated by the update of the said communication system information (it is YES at step S2). ), It is determined whether or not the number of cells in the updated neighboring cell information exceeds a predetermined value (step S3).

  If the number of cells in the updated neighbor cell information does not exceed the predetermined value even after updating the neighbor cell information (NO in step S3), the neighbor cell information generation unit 32 sets the new cell ID as the neighbor cell information. to add. Then, the neighboring cell information transmission unit 34 notifies the neighboring cell information updated by the neighboring cell information generation unit 32 to the wireless terminal device 202 that can communicate with its own macro base station 201 (step S4).

  On the other hand, when the neighboring cell information is updated and the number of cells in the updated neighboring cell information exceeds a predetermined value (YES in step S3), the neighboring cell information generation unit 32 sets a new cell ID in the neighboring cell information. Without adding, another information for notifying the wireless terminal device 202 communicating with its own macro base station 201 is generated. That is, the neighboring cell information generation unit 32 adds a new one or more radio base station apparatuses to the neighboring cell information, and adds one or more new radio base station apparatuses to the radio cell in the neighboring cell information. When the number of station devices exceeds a predetermined value, one or more new radio base station devices are not added to the neighboring cell information. Then, the adjacent cell information generation unit 32 generates spare adjacent cell information indicating a new cell ID that has not been added.

  Then, the neighboring cell information transmission unit 34 transmits the spare neighboring cell information generated by the neighboring cell information generation unit 32 to the wireless terminal device 202 that can communicate with its own macro base station 201 (step S5).

  In step S5, among the plurality of cell IDs to be newly added, only the cell ID of the femto base station 101 with which a certain wireless terminal device 202 can communicate is included in the spare adjacent cell information and is stored in the wireless terminal device 202. Notification may be made, or a plurality of cell IDs to be newly added may be included in the spare neighboring cell information and notified to the wireless terminal device 202.

  That is, if the neighboring cell information generation unit 32 does not add one or more new radio base station devices to the neighboring cell information, the neighboring cell information transmission unit 34 is communicating with the target base station and The wireless terminal device 202 that can communicate with a part or all of one or a plurality of radio base station devices, and a part or all of the new one or a plurality of radio base station devices as information different from the neighboring cell information Notice.

  FIG. 23 is a flowchart defining another example of an operation procedure when the macro base station according to the second embodiment of the present invention updates neighboring cell information.

  Referring to FIG. 23, the operations in steps S11 to S14 are the same as the operations in steps S1 to S4 shown in FIG.

  When the neighboring cell information is updated, if the number of cells in the updated neighboring cell information exceeds a predetermined value (YES in step S13), the neighboring cell information generation unit 32 selects the macro among the cells registered in the neighboring cell information. Of the wireless terminal devices 202 located in the base station 201, a cell having no member is deleted from the neighboring cell information.

  That is, the neighboring cell information generation unit 32 adds a new one or more radio base station apparatuses to the neighboring cell information, and adds one or more new radio base station apparatuses to the radio cell in the neighboring cell information. When the number of station devices exceeds a predetermined value, among the one or a plurality of radio base station devices indicated in the neighboring cell information, the radio that is allowed to communicate in the radio terminal device 202 that can communicate with the target base station The radio base station apparatus in which the terminal apparatus 202 does not exist is deleted from the neighboring cell information. Then, the neighboring cell information generation unit 32 adds one or more new radio base station devices to the neighboring cell information after deletion.

  Then, the neighboring cell information transmission unit 34 notifies the neighboring cell information updated by the neighboring cell information generation unit 32 (step S16).

  FIG. 24 is a diagram illustrating an example of a method in which a wireless base station device notifies neighboring cell information to a wireless terminal device, in the wireless communication system according to the second embodiment of the present invention.

  Referring to FIG. 24, macro base station 201 notifies wireless terminal apparatus 202 in an idle state, that is, a state in which no telephone call or data communication is performed, with neighboring cell information included in broadcast information. In this case, the macro base station 201 notifies the wireless terminal device 202 that the neighboring cell information has been updated using the notification information change notification.

  More specifically, when optimization of neighboring cell information occurs (step S27), the macro base station 201 broadcasts a broadcast information change notification to each wireless terminal device 202 existing in the macro cell MC (step S28).

  Next, the macro base station 201 broadcasts broadcast information including updated neighbor cell information to each wireless terminal device 202 existing in the macro cell MC. And the radio | wireless terminal apparatus 202 which received the alerting | reporting information change notification reads adjacent cell information from the alerting | reporting information transmitted from the macro base station 201, and updates the adjacent cell information which self hold | maintains to the read adjacent cell information. (Step S29).

  Next, the wireless terminal device 202 receives a measurement start request autonomously or from the macro base station 201, and measures the reception level of the wireless signal transmitted from the wireless base station device indicated by the updated neighboring cell information ( Step S30).

  In general, an upper limit is set for the number of cell IDs that can be registered in the neighboring cell information. For this reason, if a large number of femto base stations 101 or macro base stations 201 are installed in the wireless communication system 301, there is a possibility that all cell IDs cannot be registered in the neighboring cell information. Then, it may be difficult for the wireless terminal device 202 to perform appropriate measurement operation and handover operation.

  On the other hand, in the radio communication system according to the second embodiment of the present invention, the neighboring cell information generation unit 32 adds one or more new radio base station devices to the neighboring cell information. When one or more new radio base station devices are added and the number of radio base station devices in the neighboring cell information exceeds a predetermined value, the new one or more radio base station devices are not added to the neighboring cell information. The adjacent cell information transmission unit 34 is communicating with the target base station when the adjacent cell information generation unit 32 does not add the new one or more radio base station devices to the adjacent cell information, and Information that is part or all of the new one or a plurality of radio base station devices to the radio terminal device 202 that can communicate with a part or all of the new one or a plurality of radio base station devices. Notify as.

  With such a configuration, it is possible to notify the radio terminal apparatus 202 in communication with its own macro base station 201 as an adjacent cell of a suitable and sufficient number of radio base station apparatuses as measurement targets and handover targets. Thus, it is possible to improve the efficiency of the operation in the wireless communication system.

  Moreover, in the radio | wireless communications system which concerns on the 2nd Embodiment of this invention, the adjacent cell information production | generation part 32 is a case where one or several new radio base station apparatuses are added to adjacent cell information, and new 1 Alternatively, when a plurality of radio base station devices are added and the number of radio base station devices in the neighboring cell information exceeds a predetermined value, communication with the target base station among the one or more radio base station devices indicated in the neighboring cell information Among the possible wireless terminal devices 202, a wireless base station device that does not have a wireless terminal device 202 that permits communication is deleted from the neighboring cell information. Then, the neighboring cell information generation unit 32 adds one or more new radio base station devices to the neighboring cell information after deletion.

  With such a configuration, neighboring cell information in which an appropriate and sufficient number of radio base station devices are registered as measurement targets and handover targets is notified to the radio terminal device 202 that can communicate with its own macro base station 201. Therefore, the operation efficiency in the wireless communication system can be improved.

  Moreover, in the radio | wireless communications system which concerns on the 2nd Embodiment of this invention, the adjacent cell information generation part 32 is an idle state, ie, is not communicating with a target base station among several radio base station apparatuses other than a target base station. The wireless terminal device 202 generates neighboring cell information indicating one or a plurality of wireless base station devices that transmit a wireless signal whose reception level is to be measured.

  With such a configuration, it is possible to reduce the number of neighboring cells that are the targets of periodic power measurement indicated by the broadcast information from the radio base station apparatus, so that the radio terminal apparatus 202 performs a wasteful measurement operation. Can be prevented. In particular, since the power consumption of the wireless terminal device 202 in the idle state can be reduced, a remarkable effect can be obtained.

  In the wireless communication system according to the second embodiment of the present invention, only the femto base station 101 is registered in the neighboring cell information generated by the macro base station 201. However, the present invention is limited to this. It is not a thing. When a plurality of macro base stations are installed in a wireless communication system, another macro base station may be registered in adjacent cell information generated by a certain macro base station.

  In the radio communication system according to the second embodiment of the present invention, the macro base station 201 is configured to generate neighboring cell information. However, the present invention is not limited to this. The femto base station 101 may be configured to generate neighboring cell information.

  Also, in the wireless communication system according to the second embodiment of the present invention, when the number of cells in the updated neighbor cell information exceeds a predetermined value, as shown in step S5 in FIG. 22 and step S15 in FIG. Although it is assumed that the processing is performed, the present invention is not limited to this. A configuration in which processing as shown in step S5 of FIG. 22 and step S15 of FIG. 23 is performed when the number of cells exceeds a predetermined value when generating initial neighboring cell information as well as when updating neighboring cell information. It may be.

  Since other configurations and operations are the same as those of the wireless communication system according to the first embodiment, detailed description thereof will not be repeated here.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Third Embodiment>
The present embodiment relates to a radio communication system in which a host apparatus operates as an adjacent cell processing apparatus instead of a radio base station apparatus as compared with the radio communication system according to the first embodiment. The contents other than those described below are the same as those of the wireless communication system according to the first embodiment.

  FIG. 25 is a diagram showing a configuration of a host device according to the third embodiment of the present invention.

  Referring to FIG. 25, host apparatus 205 includes a base station side transmitting / receiving unit 81 and a data processing unit 82.

  The base station side transmitting / receiving unit 81 transmits the communication data received from the data processing unit 82 to the macro base station 201 and each femto base station 101, and also receives the communication data received from the macro base station 201 and each femto base station 101. The data is output to the data processing unit 82.

  In the wireless communication system according to the third embodiment of the present invention, host device 205 monitors the subordinate macro base station and each femto base station to optimize neighboring cell information.

  FIG. 26 is a diagram showing the configuration of the data processing unit in the higher-level device according to the third embodiment of the present invention.

  Referring to FIG. 26, data processing unit 82 includes a terminal information acquisition unit 21, an adjacent cell information generation unit 22, a communication system information generation unit 23, and an adjacent cell information transmission unit 24.

  The terminal information acquisition unit 21 acquires identification information of the wireless terminal device 202 that is communicating with the target base station from the target base station.

  The communication system information generation unit 23 corresponds to the macro base station 201, one or more femto base stations 101 arranged around the macro base station 201, and the wireless terminal device 202 that is a member of the femto base station 101. Communication system information is generated.

  Based on the communication system information generated by the communication system information generation unit 23 and the identification information acquired by the terminal information acquisition unit 21, the adjacent cell information generation unit 22 performs a plurality of radios in the radio communication system 301 other than the target base station. Among the base station apparatuses, neighboring cell information indicating one or a plurality of radio base station apparatuses that can communicate with the radio terminal apparatus 202 communicating with the target base station is generated. That is, the neighboring cell information generation unit 22 generates the neighboring cell information for each wireless terminal device 202 that is communicating with the target base station. In the wireless communication system according to the third embodiment of the present invention, the target base station is the macro base station 201, the femto base station 101A, the femto base station 101B, the femto base station 101C, or the femto base station 101D.

  The adjacent cell information transmission unit 24 transmits the adjacent cell information generated by the adjacent cell information generation unit 22 to the target base station.

  Then, the target base station transmits the neighboring cell information received from the neighboring cell information transmission unit 24 in the higher-level device 205 to the corresponding wireless terminal device 202 communicating with itself.

  The content of the neighbor cell information generation method by the neighbor cell information generation unit 22 is the same as the neighbor cell information generation method by the neighbor cell information generation unit 12 according to the first embodiment of the present invention, for example.

  Since other configurations and operations are the same as those of the wireless communication system according to the first embodiment, detailed description thereof will not be repeated here.

  Note that, similarly to the host device according to the third embodiment of the present invention, in the second embodiment of the present invention, the host device 205 operates as an adjacent cell processing device instead of the macro base station 201. It may be. In this case, the neighboring cell information transmission unit in the host device 205 transmits the neighboring cell information for the target base station generated by the neighboring cell information generation unit to the target base station.

  Further, when the radio base station apparatus has a plurality of sectors, that is, when one cell is divided into a plurality of sectors, one sector can be treated as one radio base station apparatus in the neighboring cell information. The present invention may be applied to such a case.

  In the first to third embodiments of the present invention, the handover operation of the wireless terminal device has been specifically described. However, the movement between base stations performed by the wireless terminal device in communication with the wireless base station device ( The present invention is applicable not only to handover which is an inter-cell movement) operation but also to an inter-base station movement (inter-cell movement) operation performed by an idle wireless terminal apparatus. That is, in the first to third embodiments of the present invention, the present invention is also applied to configurations and operations in which “handover” is replaced with “movement”.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

11, 21 Terminal information acquisition unit 12, 22 Adjacent cell information generation unit 13 Communication system information acquisition unit 14, 24 Adjacent cell information transmission unit 23 Communication system information generation unit 81 Base station side transmission / reception unit 82 Data processing unit 91 Antenna 92 Circulator 93 Wireless receiver 94 Wireless transmitter 95 Signal processor 96 Received signal processor 97 Transmit signal processor 101A, 101B, 101C, 101D Femto base station 201 Macro base station 202 Wireless terminal device 203 Gateway device 205 Host device 301 Wireless communication system FCA , FCB, FCC, FCD Femtocell MC Macrocell

Claims (26)

An adjacent cell processing apparatus in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
An adjacent cell indicating one or a plurality of the radio base station devices that can communicate with the radio terminal device communicating with the target radio base station device among the plurality of radio base station devices other than the target radio base station device An adjacent cell information generating unit for generating information for each of the wireless terminal devices in communication with the target wireless base station device;
An adjacent cell processing apparatus comprising: an adjacent cell information transmission unit configured to transmit the adjacent cell information generated by the adjacent cell information generation unit to the corresponding wireless terminal device or the target wireless base station device.   The neighboring cell information generation unit generates neighboring cell information excluding at least the wireless base station device that is powered off from the plurality of wireless base station devices other than the target wireless base station device. The adjacent cell processing apparatus according to claim 1.   The adjacent cell information generation unit is configured to supply power to one or more radio base station apparatuses that can communicate with the new radio terminal apparatus when the new radio terminal apparatus starts communication with the target radio base station apparatus. The power supply information indicating whether the radio is turned on or off is acquired, and neighboring cell information for the new radio terminal device excluding at least the radio base station device that is powered off is generated. The adjacent cell processing apparatus described in 1. At least one of the plurality of radio base station devices in the communication system operates in an open access mode that permits communication to all the radio terminal devices, or registers the radio terminal devices. And can operate in a closed access mode that allows communication to the registered wireless terminal device, or can register the wireless terminal device, and the registered wireless terminal device and registration It is possible to set whether to operate in a hybrid mode that allows communication for both of the wireless terminal devices that are not,
The adjacent cell information generation unit operates in the closed access mode from among the plurality of radio base station apparatuses other than the target radio base station apparatus, and the radio terminal apparatus to which the corresponding radio terminal apparatus is not registered The neighboring cell processing apparatus according to any one of claims 1 to 3, wherein neighboring cell information excluding at least a base station apparatus is generated. The adjacent cell processing device further includes:
A communication system showing a correspondence relationship between one or a plurality of the radio base station devices arranged around the target radio base station device and one or a plurality of radio terminal devices capable of communicating with the one or a plurality of radio base station devices A communication system information acquisition unit for acquiring information;
The said adjacent cell information generation part is an adjacent cell processing apparatus of any one of Claim 1 to 4 which produces | generates the said adjacent cell information based on the said communication system information.   The communication system information is notified from the radio base station apparatus other than the target radio base station apparatus that detected the target radio base station apparatus, and the identification information of the radio base station apparatus and the identification of the target radio base station apparatus 6. The adjacent cell processing device according to claim 5, which is generated based on information.   The communication system information is identification information of the target radio base station apparatus acquired based on position information indicating an installation location of the radio base station apparatus other than the target radio base station apparatus, and the position information corresponding to the position information 6. The adjacent cell processing device according to claim 5, which is generated based on identification information of the radio base station device.   The communication system information is generated based on power information indicating whether the power of the radio base station apparatus is turned on or off, which is notified from the radio base station apparatus other than the target radio base station apparatus. The adjacent cell processing apparatus according to claim 5.   The communication system information is generated based on power supply information that is periodically notified from the radio base station apparatus other than the target radio base station apparatus and that indicates that the power supply of the radio base station apparatus is turned on. The adjacent cell processing apparatus according to claim 5.   The adjacent cell processing according to any one of claims 5 to 9, wherein the communication system information acquisition unit acquires the communication system information from a management device that stores information on each of the radio base station devices in the communication system. apparatus. An adjacent cell processing apparatus in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
Among the plurality of radio base station apparatuses other than the target radio base station apparatus, for generating neighboring cell information indicating one or more radio base station apparatuses arranged around the target radio base station apparatus An adjacent cell information generation unit;
Neighbor cell information transmitter for transmitting the neighbor cell information generated by the neighbor cell information generator to the target radio base station apparatus or for notifying a radio terminal apparatus capable of communicating with the target radio base station apparatus And
The neighboring cell information generation unit is a case where one or more new radio base station devices are added to the neighboring cell information, and when the one or more new radio base station devices are added, the neighboring cell information When the number of the radio base station devices in the information exceeds a predetermined value, the new one or more radio base station devices are not added to the neighboring cell information,
The neighboring cell information transmission unit is communicating with the target radio base station device when the neighboring cell information generation unit does not add the one or more new radio base station devices to the neighboring cell information. And, to the wireless terminal device capable of communicating with a part or all of the new one or a plurality of the radio base station devices, a part or all of the new one or a plurality of the radio base station devices are transferred to the adjacent cell. An adjacent cell processing apparatus that notifies as information different from information. An adjacent cell processing apparatus in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
Among the plurality of radio base station apparatuses other than the target radio base station apparatus, for generating neighboring cell information indicating one or more radio base station apparatuses arranged around the target radio base station apparatus An adjacent cell information generation unit;
Neighbor cell information transmitter for transmitting the neighbor cell information generated by the neighbor cell information generator to the target radio base station apparatus or for notifying a radio terminal apparatus capable of communicating with the target radio base station apparatus And
The neighboring cell information generation unit is a case where one or more new radio base station devices are added to the neighboring cell information, and when the one or more new radio base station devices are added, the neighboring cell information When the number of radio base station devices in the information exceeds a predetermined value, among the one or more radio base station devices indicated in the neighboring cell information, the radio base station device satisfying the following condition is selected as the neighboring cell. An adjacent cell processing device that is deleted from information and adds the one or more new radio base station devices to the adjacent cell information after deletion.
Condition: A wireless base station device in which no wireless terminal device is permitted to communicate with among the wireless terminal devices capable of communicating with the target wireless base station device   The adjacent cell processing apparatus according to any one of claims 1 to 12, wherein at least one of the plurality of radio base station apparatuses other than the target radio base station apparatus is a femto base station.   The neighboring cell processing apparatus according to any one of claims 1 to 13, wherein the neighboring cell processing apparatus is included in one or a plurality of the radio base station apparatuses. An adjacent cell processing method in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
An adjacent cell indicating one or a plurality of the radio base station devices that can communicate with the radio terminal device communicating with the target radio base station device among the plurality of radio base station devices other than the target radio base station device Generating information for each wireless terminal device in communication with the target wireless base station device;
Transmitting the generated neighboring cell information to the corresponding wireless terminal device or the target wireless base station device. An adjacent cell processing method in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
Generating neighboring cell information indicating one or a plurality of the radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the target radio base station device; ,
Transmitting the generated neighboring cell information to the target radio base station apparatus or notifying to a radio terminal apparatus capable of communicating with the target radio base station apparatus,
In the step of generating the neighboring cell information, when adding one or more new radio base station devices to the neighboring cell information, and adding the one or more new radio base station devices, When the number of the radio base station devices in the neighboring cell information exceeds a predetermined value, the new one or a plurality of the radio base station devices are not added to the neighboring cell information,
In the step of transmitting the neighboring cell information, in the step of generating the neighboring cell information, when the one or more new radio base station devices are not added to the neighboring cell information, the target radio base station device A part of the new one or a plurality of the radio base station apparatuses or a part of the one or a plurality of the radio base station apparatuses that can communicate with a part or all of the new one or a plurality of the radio base station apparatuses. A neighbor cell processing method of notifying all of the information as information different from the neighbor cell information. An adjacent cell processing method in a communication system capable of communicating with a plurality of radio base station apparatuses by performing a mobile operation of a radio terminal apparatus,
Generating neighboring cell information indicating one or a plurality of the radio base station devices arranged around the target radio base station device among the plurality of radio base station devices other than the target radio base station device; ,
Transmitting the generated neighboring cell information to the target radio base station apparatus or notifying to a radio terminal apparatus capable of communicating with the target radio base station apparatus,
In the step of generating the neighboring cell information, when one or more new radio base station apparatuses are added to the neighboring cell information, the one or more new radio base station apparatuses are added. When the number of the radio base station apparatuses in the neighboring cell information exceeds a predetermined value, the radio base station apparatus that satisfies the following condition among the one or more radio base station apparatuses indicated in the neighboring cell information: A neighboring cell processing method of deleting from the neighboring cell information and adding the one or more new radio base station apparatuses to the neighboring cell information after being deleted.
Condition: A wireless base station device in which no wireless terminal device is permitted to communicate with among the wireless terminal devices capable of communicating with the target wireless base station device A data structure of information notified between radio base station devices,
A data structure comprising power state data indicating a power state of the radio base station apparatus. A data structure of information notified between one or a plurality of radio base station devices and higher-level devices communicable with each of the radio base station devices,
Transmission source base station identification data indicating identification information of the radio base station apparatus that is the transmission source of the information;
A data structure comprising: power state data indicating a power state of the radio base station apparatus that is a transmission source of the information. A data structure of information notified to each of the radio base station devices from a host device capable of communicating with one or a plurality of radio base station devices,
Base station identification data indicating identification information of the radio base station device;
A data structure comprising: power state data indicating a power state of the radio base station apparatus corresponding to the identification information.   The data structure according to any one of claims 18 to 20, wherein the power status data indicates whether the power of the radio base station device has transitioned from on to off or from off to on.   The data structure according to any one of claims 18 to 21, wherein the power state data indicates whether a power source of the radio base station apparatus is in an on state or an off state. The data structure further includes:
The apparatus according to any one of claims 18 to 22, comprising at least one of load status data indicating a load status of the radio base station device and data on the number of communicating terminals indicating the number of radio terminal devices communicating with the radio base station device. The data structure according to item 1. A data structure of information notified between radio base station devices,
A data structure comprising power state notification request data indicating that a power state notification is requested to the radio base station apparatus. A data structure of information notified between one or a plurality of radio base station devices and higher-level devices communicable with each of the radio base station devices,
Transmission source base station identification data indicating identification information of the radio base station apparatus that is the transmission source of the information;
A data structure comprising: power status notification request data indicating that a request for power status notification is requested to another radio base station apparatus. The data structure further includes:
The data structure according to claim 19 or 25, comprising transmission destination base station identification data indicating identification information of one or a plurality of the radio base station apparatuses that are transmission destinations of the information.

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