JP2010187159A - Base station device, information device, control method of base station device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure stable communication service quality in using a femto base station installed in the house of a cellular communication service user. <P>SOLUTION: The femto base station 1 is connected to a home network (HNW) 50 of the cellular communication service user to be used. The femto base station 1 is configured so as to be connected to a core network 57 of a cellular communication provider via the HNW 50 and a broadband line 54. Further, the femto base station 1 is configured so as to cooperatively adjust data traffic caused to flow in at least either the HNW 50 or the broadband line 54 with other devices (devices 52, 53 and the like) connected to the HNW such that the femto base station 1 should secure a communication band corresponding to a radio resource to be allocated to subordinate mobile station 4 between the core network 57 and itself. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a base station for a cellular communication system, and more particularly to control of a communication band by a base station installed in a user's home of a cellular communication service.

  A base station installed in a user's home of a cellular communication service (mobile phone service) is generally called a femto base station, a femto cell base station, or a home base station. A small cell formed by a femto base station is called a femto cell. For example, femto base stations have been studied in the 3rd Generation Partnership Project (3GPP) standardization project for third generation mobile communication systems (see Non-Patent Document 1).

  The main connection between the femto base station and the core network of the cellular communication carrier (cell phone carrier) is the cellular communication service user's home network (hereinafter referred to as the home network) and the broadband network operator's network. (Hereinafter referred to as a backhaul network). At present, the home network and the backhaul network are generally IP (Internet Protocol) networks.

  By the way, techniques relating to bandwidth control in a communication network are known (Patent Documents 1 to 4). For example, Patent Document 1 discloses a bandwidth control method that allows a communication bandwidth to be interchanged between a plurality of devices that share a communication network. Specifically, (i) when a terminal reserves a new band to start communication, it confirms the availability of the bandwidth of the communication network; (ii) if there is not enough available, the other terminal Requesting the release of the communication band in use, and (iii) starting a new communication by securing the communication band released in response to the request.

  Patent Document 2 discloses a congestion control method in a cellular communication system. Specifically, (i) the base station detects the occurrence of congestion in the transmission path (Iub) between the base station and the radio network controller (RNC), and (ii) the congestion of the Iub. It is disclosed that a detected base station requests a subordinate mobile station to reduce a data rate.

  Patent Document 3 discloses that in a public wireless LAN system shared by a plurality of communication carriers, a communication band of a backhaul line that connects a wireless LAN (Local Area Network) gateway device and a backbone network is efficiently shared between the carriers. A bandwidth control method for sharing is disclosed. Specifically, (i) traffic control parameters for each operator are determined in advance, and (ii) when congestion occurs in the backhaul line, the bandwidth used by each operator is determined based on the traffic control parameters. Is limited. The traffic control parameter defines, for example, a weight (ratio) of bandwidth allocation when congestion occurs on the backhaul line.

  Patent Document 4 discloses QoS (Quality of Service) control of a wireless LAN. Specifically, it is disclosed that communication data is categorized according to a difference in allowable level of transfer delay or a difference in service contents, and QoS control such as guarantee of a use band for each category in a wireless LAN is performed.

JP 2008-177979 A JP 2008-131535 A JP 2007-129401 A JP 2007-180889 A

3GPP TS25.467 V8.0.0 (2008-12), Technical Specification Group Radio Access Network; UTRAN Architecture for 3G Home NodeB; Stage 2 (Release 8)

  Unlike traditional cellular base stations (so-called macro base stations) that are directly connected to the core network, the network between the femto base station and the core network is difficult for cellular operators to control quality (ie Home network and backhaul network).

  The femto base station is not the only device connected to the home network. In addition to the femto base station, information devices having communication functions such as personal computers (PCs), television receivers, game machines, and printers are connected to a home network together with data transfer devices such as routers and bridges. Depending on the connection form in the home network, the femto base station may share the communication band in the home network with other information devices. In general, PCs and game machines access an external network such as the Internet. For this reason, the femto base station also shares an access line on the backhaul network side with an information device such as a PC in the home network. The access line on the backhaul network side is an optical fiber, a coaxial cable, an ADSL (Asymmetric Digital Subscriber Line), or the like.

  In other words, in the femtocell system, the communication band of the home network or backhaul network is occupied by data transmitted and received by other information devices existing in the home network, and the communication band between the femto base station and the core network is stabilized. May not be secured. For example, it is assumed that when a PC downloads a large amount of data from the Internet, a call is made to a mobile station connected to the femto base station while the bandwidth of the home network or backhaul network is already occupied. The In this case, since the remaining bandwidth of the home network or the backhaul network is not sufficient, there is a possibility that the same quality of service as the cellular communication service provided by the conventional macro cell cannot be provided. Note that Patent Documents 1 to 4 described above do not specifically disclose a solution to the above-described degradation in the quality of the cellular communication service that may occur when using a femto base station.

  The present invention has been made on the basis of the above-mentioned knowledge by the inventor of the present application, and can ensure stable communication service quality when using a femto base station installed in a cellular communication service user's home. The purpose is to.

  A first aspect of the present invention is a base station apparatus used by connecting to a home network of a cellular communication service user. The base station apparatus is configured to connect to a cellular communication operator's core network via the home network and a broadband communication line. Further, the base station apparatus transmits data traffic flowing through at least one of the in-home network and the broadband line in order to secure a communication band corresponding to a radio resource to be allocated to a subordinate mobile station with the core network. Adjustment is performed in cooperation with other devices connected to the home network.

  A 2nd aspect of this invention is a base station apparatus for a cellular communication system, Comprising: It has a 1st communication part, a 2nd communication part, and a control part. The first communication unit is connected to a cellular communication service user's home network, and communicates with the cellular communication service provider's core network via the home network and a broadband communication line. The second communication unit performs wireless communication with a mobile station using a radio resource determined based on an allocation request from the core network or the mobile station. Further, the control unit responds to the radio resource by suppressing data traffic flowing through at least one of the home network and the broadband line for communication of other devices connected to the home network. A communication band is secured between the second communication means and the core network.

  An information device according to the third aspect of the present invention includes a communication unit and a control unit. The communication unit is connectable to a cellular communication service user's home network. In addition, the control unit, when a base station device connected to a core network of a cellular communication carrier via the home network and a broadband communication line starts communication with a mobile station, the base station device and the mobile The amount of data transmitted or received from the communication unit to the in-home network is adjusted so that a communication band corresponding to a radio resource with a station is secured between the base station apparatus and the core network.

According to a fourth aspect of the present invention, there is provided a method for a base station apparatus disposed in a cellular communication service user's home network and connected to a cellular communication company's core network via the home network and a broadband communication line. It is a control method. The method is
(A) Adjustment of data traffic flowing through at least one of the in-home network and the broadband line is adjusted in the in-house in order to secure a communication band corresponding to a radio resource to be allocated to a subordinate mobile station with the core network. Work with other devices connected to the network,
including.

A fifth aspect of the present invention is a program for causing a computer to execute control processing related to a base station apparatus. Here, the base station device is arranged in a cellular communication service user's home network, and is connected to the cellular communication carrier's core network via the home network and a broadband communication line. The control processing related to the base station apparatus brought about by the program is
(A) Adjustment of data traffic flowing through at least one of the in-home network and the broadband line is adjusted in the in-house in order to secure a communication band corresponding to a radio resource to be allocated to a subordinate mobile station with the core network. Work with other devices connected to the network,
including.

  According to the present invention, when using a femto base station installed in a cellular communication service user's home, stable communication service quality can be ensured.

It is a network block diagram which shows the example of arrangement | positioning of the femto base station concerning Embodiment 1 of invention. It is a block diagram which shows the structural example of the femto base station concerning Embodiment 1 of invention. It is an example of the service information which the femto base station concerning Embodiment 1 of an invention produces | generates. It is a sequence diagram which shows an example of the transmission timing of the service information by the femto base station concerning Embodiment 1 of invention. It is a sequence diagram which shows the other example of the transmission timing of the service information by the femto base station concerning Embodiment 1 of invention. It is a sequence diagram which shows an example of reception of the service information by the femto base station concerning Embodiment 1 of invention. It is a sequence diagram regarding the communication band adjustment process which the femto base station concerning Embodiment 1 of an invention performs in cooperation with another device. It is a flowchart which shows the specific example of the communication band adjustment procedure which the femto base station concerning Embodiment 1 of invention performs. It is a sequence diagram regarding the communication band release process which the femto base station concerning Embodiment 1 of an invention performs in cooperation with another device. It is a flowchart which shows the specific example of the communication band release procedure which the femto base station concerning Embodiment 1 of invention performs. It is a flowchart which shows the other example of the communication band adjustment procedure which the femto base station concerning Embodiment 1 of invention performs.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary for the sake of clarity.

<Embodiment 1 of the Invention>
The femto base station 1 according to the present embodiment is connected to the home network of the cellular communication service user together with other devices. FIG. 1 is a network diagram illustrating an arrangement example of the femto base stations 1. In the following description regarding the present embodiment, the arrangement of the femto base station 1 illustrated in FIG. 1 will be described as an example.

  In FIG. 1, the femto base station 1 is connected to a home network 50. The home network 50 is a network constructed in the home of a wired person using a cellular communication service, and is, for example, a wired LAN (Local Area Network) or a wireless LAN. Other devices 52 and 53 are also connected to the home network 50. The devices 52 and 53 are, for example, a PC, a game machine, a television receiver having a network connection function, or the like. Devices 52 and 53 may also be other femto base stations.

  The router 51 is a gateway between the home network 50 and the external backhaul network 55, and is connected to the backhaul network 55 by a broadband line 54. The router 51 relays data packets between the home network 50 and the backhaul network 55 for Internet access of the devices 52 and 53, communication between the femto base station 1 and the core network, and the like. Here, the broadband line 54 is an access line provided by a broadband communication provider, such as an optical fiber, a coaxial cable, or ADSL. Further, the backhaul network 55 includes an IP network in a broadband line operator. The backhaul network 55 may include the Internet.

  The femto gateway (femto GW) 56 is installed at the boundary between the core network 57 and the backhaul network 55 of the cellular communication carrier. The femto base station 1 is connected to the femto GW 56 via the home network 1, the broadband line 54, and the backhaul network 55. The femto GW 56 performs registration processing of the femto base station 1 and the mobile station 4 that is wirelessly connected to the femto base station 1. For example, in Non-Patent Document 1, which defines a W-CDMA (Wideband Code Division Multiple Access) femto base station, the function of the femto GW is defined by the name “HNB (Home NodeB) GW”.

  As shown in FIG. 1, communication between a device (for example, a femto GW 56 and an exchange (not shown)) on the core network 57 side, a femto base station 1 and a mobile station 4 under the control is performed by a home network 50 and a broadband line. 54 and the backhaul network 55. For this reason, at least the communication band of the broadband line 54 is shared by the communication data between the femto base station 1 and the femto GW 56 and the communication data of the other devices 52 and 53. On the other hand, whether or not the communication band of the home network 50 is shared between the femto base station 1 and the other devices 52 and 53 depends on the network configuration of the home network 50. For example, when a wireless LAN in which wireless resources are shared between terminals is used, the communication band of the home network 50 is shared between the femto base station 1 and the devices 52 and 53. On the other hand, in the case of the following network configuration, the femto base station 1 can occupy a communication band with the router 51. For example, a form in which the femto base station 1 is cable-connected to the switching HUB built in the router 51, or the femto base station 1 and the router 51 are integrated together in the same case at the time of implementation, and the switching HUB in the case and the internal It is the form connected by wiring.

  Since the femto base station 1 secures a communication band necessary for communication between the mobile station 4 and the core network 57 on the shared network (broadband line 54 and home network 50), the use band of the shared network is allocated to the devices 52 and 53. To coordinate with. More specifically, when the femto base station 1 receives an allocation request for radio resources used for communication on the user plane (U-plane) from the exchange on the core network 57 side or the mobile station 4, the radio resource The communication band to be secured with the core network 57 may be specified by referring to the allocation request. Then, when the free bandwidth of the shared network is not sufficient, the femto base station 1 may request the devices 52 and 53 to suppress the data traffic in order to secure the previously specified communication bandwidth on the shared network. In the case of W-CDMA, the radio resource assignment request is a “radio access bearer assignment request (RAB) assignment request (RAB)” from the core network 57. In the case of LTE (long term evolution), it is a resource block allocation request from the core network 57. A resource block is a basic unit of radio resources used for downlink data transmission from an LTE base station to a mobile station, includes a plurality of OFDM subcarriers in the frequency domain, and includes at least one symbol time in the time domain.

  Below, the structural example of the femto base station 1 and the specific example of the adjustment procedure of the use band of a shared network (broadband circuit | line 54 and the home network 50) are demonstrated in order. FIG. 2 is a block diagram illustrating a configuration example of the femto base station 1. In the example of FIG. 2, the femto base station 1 includes a wireless communication unit 10, a home network (HNW) communication unit 11, and a bandwidth control unit 12.

  The wireless communication unit 10 performs wireless communication with the mobile station 4. More specifically, the radio communication unit 10 generates downlink transmission symbol sequences by performing downlink data channel coding, interleaving, and symbol mapping. Further, the radio communication unit 10 performs processing such as orthogonal modulation, frequency conversion, and signal amplification of the transmission symbol sequence to generate a downlink radio signal and transmits it to the mobile station 4. The modulation scheme, frequency allocation, and the like for generating the downlink radio signal are determined according to the downlink radio resource allocated to the mobile station 4. Further, the radio communication unit 10 receives an uplink radio signal from the mobile station 4, demodulates the encoded data sequence, performs deinterleaving, transmission path decoding, and the like to restore the uplink data. The demodulation method, frequency allocation, and the like applied to the uplink radio signal are determined according to the uplink radio resource allocated to the mobile station 4.

  The HNW communication unit 11 has a communication interface (wireless LAN interface, wired LAN interface, etc.) for connecting to the home network 50. The HNW communication unit 11 executes communication control according to the communication protocol of the home network 50 and establishes a communication tunnel with the femto GW 56 via the router 51. The HNW communication unit 11 transmits user plane communication data, control plane (C-plane) control data, and management data for performing registration processing of the femto base station 1 and the mobile station 4 to the core network 57 and the like. Data is transmitted to and received from the GW 56.

  The bandwidth control unit 12 refers to a radio resource allocation request received from the core network 57 or the mobile station 4 and specifies a communication bandwidth to be secured with the core network 57. Then, adjustment of traffic transmitted and received by the devices 52 and 53 in the home network 50 is executed.

  In the following, some specific examples of communication band control operations performed by the band control unit 12 in cooperation with the other devices 52 and 53 will be described with reference to FIGS. In order for the femto base station 1 and the devices 52 and 53 to mutually grasp the communication band and data traffic type (for example, either a fixed rate or a variable rate) used by each device, service information as shown in FIG. Should be sent. FIG. 3 is an example of service information that the femto base station 1 transmits to the devices 52 and 53. The service information shown in FIG. 3 includes information on a device name, a service name, a use band of the home network 50 and the backhaul network 55, a type of rate control, and a communication protocol. The femto base station 1 may receive service information from other devices 52 and 53 in order to grasp the communication status of the other devices 52 and 53, but it does not necessarily have to transmit its own service information. The femto base station 1 may receive service information including information on at least a network usage band from the devices 52 and 53.

  4 and 5 are sequence diagrams showing transmission timings when the femto base station 1 transmits service information. As shown in FIG. 4, the femto base station 1 may periodically transmit service information to devices in the home network 50 at a predetermined transmission interval T (S11 and S12). As shown in FIG. 5, the femto base station 1 may transmit updated service information (S22) when an event accompanied by a change in the communication service status occurs (S21). Here, the event accompanied by a change in the communication service status includes (i) securing a communication band by opening a new communication channel on the user plane, (ii) releasing a communication band by ending communication of the mobile station 4, and the like.

  4 and 5, the femto base station 1 may receive service information from the devices 52 and 53 periodically or in response to an event occurrence. In addition, the femto base station 1 may transmit a service information transmission request to the devices 52 and 53 in order to acquire the latest use state of the communication band in a timely manner. Specifically, as shown in FIG. 6, a service information request is transmitted from the femto base station 1 to the devices 52 and 53 (S31), and the service information transmitted from the devices 52 and 53 in response to this request is transmitted to the femto The base station 1 may receive (S32 and S33).

  By receiving service information from the devices 52 and 53, the femto base station 1 can grasp the usage status of the communication bands of the devices 52 and 53. Note that the method by which the femto base station 1 grasps the band usage status of the devices 52 and 53 is not limited to the transmission / reception of the service information described above. For example, a server device that centrally manages the usage status of the communication band of each device and the traffic type may be arranged in the home network 50. In this case, the femto base station 1 may make an inquiry to the server device. This server device may be, for example, a PC in the home network 50 or a router 51.

  Next, a specific procedure when the femto base station 1 secures communication bands of the home network 50 and the broadband line 54 in response to a radio resource allocation request from the core network 57 or the mobile station 4 will be described. FIG. 7 is a sequence diagram illustrating a specific example of a procedure in which the femto base station 1 secures a communication band. In step S <b> 41 of FIG. 7, the femto base station 1 receives a radio resource allocation request transmitted from an exchange (not shown) in the core network 57 via the femto GW 56 and the router 51.

  In step S42, the femto base station 1 reads the information included in the radio resource allocation request, and identifies the service type and necessary bandwidth in the radio section. Further, the femto base station 1 determines a communication band to be secured in the shared network (the home network 50 and the backhaul network 55) based on the service type of the wireless section, the necessary band, or both. In step S43, a band adjustment process for securing the communication band determined in step S42 is performed.

  FIG. 8 is a flowchart describing the operation of the femto base station 1 in the bandwidth adjustment processing shown in step S43 of FIG. In step S51, it is confirmed whether the home network 50 and the broadband line 54 have a free band. The presence / absence of a free bandwidth may be determined by comparing the effective maximum bandwidth of the home network 50 and the broadband line 54 with the total used bandwidth of the devices 52 and 53. The effective maximum bandwidth of the home network 50 and the broadband line 54 may be acquired by inquiring the router 51, for example. In addition, the use bands of the devices 52 and 53 may be specified with reference to service information acquired from these devices.

  If it is determined that the free bandwidth is sufficient (YES in S52), steps S53 to S55 described below may be skipped and step S56 (secure free bandwidth) may be performed. On the other hand, when it is determined that the available bandwidth is not sufficient (NO in S52), the femto base station 1 specifies a traffic adjustable service (for example, a variable rate service) (S53). In step S54, an inquiry about whether or not traffic can be suppressed is transmitted to the target device (for example, device 52) that provides the service specified in step S53. The target device that has received the inquiry transmits response data including a response indicating whether or not traffic suppression is possible to the femto base station 1.

  In step S55, a request for traffic suppression (in other words, reduction of the used bandwidth) is requested to the target device that has responded that traffic suppression is possible. The target device that has received the request performs traffic suppression and transmits response data including the suppression result to the femto base station 1.

  In step S56, the femto base station 1 secures a free band, generates service information (for example, FIG. 3) indicating that a new communication band has been secured, and transmits the service information to the devices 52 and 53.

  Of course, the band adjustment procedure of FIG. 8 is an example. For example, when the router 51 is responsible for bandwidth adjustment in the home network 50, the femto base station 1 may request the router 51 for bandwidth adjustment. Specifically, as shown in FIG. 11, a bandwidth adjustment request is transmitted to the router 51 (S81), and the bandwidth adjustment result is received from the router 51 (S82).

  Subsequently, in the following, in response to a request to release radio resources for stopping a communication service for the mobile station 4 (for example, disconnection of a radio channel for voice communication due to the end of a call), the femto base station 1 sets the home network 50 and broadband line 54 A specific procedure for releasing the communication band will be described. FIG. 9 is a sequence diagram illustrating a specific example of a procedure in which the femto base station 1 releases the communication band. In step S61 of FIG. 9, the femto base station 1 receives the radio resource release request transmitted from the exchange (not shown) in the core network 57 via the femto GW 56 and the router 51.

  In response to receiving the radio resource release request, the femto base station 1 releases radio resources with the mobile station 4 in step S62. In step S63, the femto base station 1 notifies the core network 57 that the radio resource has been released.

  In step S64, the femto base station 1 performs processing for releasing the communication bands of the home network 50 and the broadband line 54 that have been secured in advance. Specifically, in order to notify the other devices 52 and 53 that the communication band has been released, updated service information associated with the occurrence of an event may be transmitted according to the procedure shown in FIG. Note that, as described in step S55 of FIG. 8, when there is a target device that has been subjected to traffic suppression (decrease in the used bandwidth) in order to secure the communication band of the femto base station 1, the target device is released. It is desirable to preferentially allocate the bandwidth to be used. Therefore, the femto base station 1 may execute a bandwidth release procedure as shown in FIG.

  In step S71 of FIG. 10, the femto base station 1 confirms the continuation information of the service that has contributed to traffic suppression. This may be done by checking the service status received from the devices 52 and 53. Inquiries may also be made directly to target devices that have contributed to traffic suppression.

  If the service that contributed to the traffic suppression is ongoing (YES in S72), the target device is inquired about whether or not the traffic increase (in other words, the increase in the used bandwidth) is necessary (S73). When a response indicating that an increase is necessary is received from the target device in response to this inquiry (YES in S74), the femto base station 1 requests the target device to increase the bandwidth (S75).

  On the other hand, when the service that contributed to traffic suppression has ended (NO in S72), or when the target device does not require an increase in traffic (NO in S74), the femto base station 1 performs the communication service of the mobile station 4. Release of the communication band reserved for provision is notified to the home network 50 (S76). Specifically, the service information updated with the occurrence of the event may be transmitted according to the procedure shown in FIG.

  As described above, the femto base station 1 according to the present embodiment communicates with the other devices 52 and 53 existing in the home network 50 and provides them to the subordinate mobile station 4 in cooperation with these devices. Secure a communication band corresponding to the communication service to be used on the shared network. Thereby, a communication service can be stably provided to the mobile station 4.

  Further, in the present embodiment, as a specific example of the timing at which the femto base station 1 secures a communication band on the shared network, the timing is dynamically changed in response to a radio resource allocation request from the core network 57 or a mobile station. An example of securing a communication band has been described. According to such a specific example, a communication band can be selectively secured only when communication of the mobile station 4 occurs. That is, since the femto base station 1 does not always secure the band of the shared network, the influence on the communication of the devices 52 and 53 due to the compression of the communication band can be suppressed.

  Moreover, in this Embodiment, the example which communicates directly with the other devices 52 and 53 in the home network 50 was shown as a specific example of the procedure which the femto base station 1 secures a communication band on a shared network. . According to such a specific example, the communication band of the femto base station 1 can be secured without using an expensive router having a QoS (Quality of Service) control function as the router 51.

  By the way, the processing for securing and releasing the communication band of the shared network (home network 50 and broadband line 54) performed by the band control unit 12 of the femto base station 1 is performed by ASIC (Application Specific Integrated Circuit), DSP (Digital Signal Processor). You may implement | achieve using semiconductor processing apparatuses, such as. The processing is realized by causing a computer such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit) to execute a program in which the processing procedure described with reference to the sequence diagrams and flowcharts of FIGS. May be. This program can be stored in various types of storage media, and can be transmitted via a communication medium. Here, the storage medium includes, for example, a flexible disk, a hard disk, a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD, a ROM cartridge, a battery-backed RAM memory cartridge, a flash memory cartridge, a nonvolatile RAM cartridge, and the like. . In addition, the communication medium includes a wired communication medium such as a telephone line, a wireless communication medium such as a microwave line, and the Internet.

  In FIG. 1, the femto base station 1 and the router 51 are illustrated as separate devices. These are logically (functionally) separate devices, but as mentioned above, the femto base station 1 and the router 51 may be integrated information communication devices at the time of implementation. Good.

  Further, FIG. 1 shows an example in which a plurality of devices (52 and 53) exist in the home network, but there may be one other device with which the femto base station 1 communicates. Further, the femto base station 1 need not be able to perform the above-described bandwidth adjustment with all devices connected to the home network 50, but may be with some devices that support the bandwidth adjustment.

<Other embodiments>
In the first embodiment of the invention, an example has been described in which the femto base station 1 adjusts the communication band for both the home network 50 and the broadband line 54. However, in another embodiment of the present invention, the shared network that is subject to communication band adjustment by the femto base station may be only one of the home network 50 and the broadband line 54. For example, if any one of the communication path capacities is sufficiently large, it is not necessary to adjust the bandwidth for the shared network having a large capacity.

  Further, in the first embodiment of the invention, an example in which the communication band is dynamically secured in accordance with the start and end of communication of the mobile station 4 has been described. However, in another embodiment of the present invention, the femto base station does not dynamically secure the communication band, but starts securing the communication band after the connection with the femto GW 56 is completed, and operates the femto base station. During this time, the communication band may be secured continuously.

  In Embodiment 1 of the invention, the femto base station 1 specifies the type (variable rate or fixed rate) of the communication service provided by the other devices 52 and 53, and provides the device that provides the variable rate service. An example of requesting bandwidth adjustment has been described. However, in another embodiment of the present invention, a device that provides a fixed rate service that cannot adjust the bandwidth may be requested to narrow the communication bandwidth. In addition, the device in the home network 50 may be requested to suppress data traffic without specifying the type of communication service.

  Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention described above.

1 Femto base station 10 Wireless communication unit 11 Home network (HNW) communication unit 12 Band control unit 50 Home network (HNW)
51 router 52, 53 device 54 broadband line 55 backhaul network 56 femto gateway (femto GW)
57 Core network

Claims (23)

A base station device used by connecting to a cellular communication service user's home network,
Configured to connect to the core network of the cellular carrier through the home network and the broadband communication line,
Connection of data traffic flowing through at least one of the in-home network and the broadband line is connected to the in-home network in order to secure a communication band according to radio resources allocated to subordinate mobile stations with the core network Configured to work with other connected devices,
Base station device.   A configuration for determining the size of the communication band to be secured based on an allocation request transmitted from the core network or the mobile station to the base station apparatus in order to request allocation of the radio resource to the mobile station. The base station apparatus according to claim 1.   The base station apparatus according to claim 1, wherein the base station apparatus is configured to secure the communication band in accordance with the start of communication of the mobile station and release the communication band in accordance with the end of communication of the mobile station.   When releasing the communication band in response to the end of communication of the mobile station, the communication band is configured to be preferentially assigned to a device that has contributed to the suppression of data traffic when the communication band is secured. The base station apparatus according to claim 3. Configured to collect communication service types provided by a plurality of other devices connected to the home network;
Based on a predetermined criterion for the communication service type, a target device that should suppress data traffic is specified from the plurality of other devices, and the target device is requested to suppress data traffic. The base station apparatus according to any one of claims 1 to 4.   For securing the communication band, the base station apparatus transmits a band securing request to the first device connected to the home network, and receives the bandwidth securing request from the receiving first device. The base station apparatus of any one of Claims 1-4 performed by receiving the response which shows ensuring of a zone | band.   The base station apparatus according to claim 6, wherein the first device is a router arranged at a boundary between the home network and the broadband line. A base station apparatus for a cellular communication system,
A first communication means connected to a cellular communication service user's home network and communicating with the cellular communication service provider's core network via the home network and a broadband communication line;
Second communication means for performing wireless communication with a mobile station using a radio resource determined based on an allocation request from the core network or the mobile station;
By suppressing data traffic flowing through at least one of the home network and the broadband line for communication of other devices connected to the home network, a communication band corresponding to the radio resource is set to the second Control means for securing between the communication means and the core network;
A base station apparatus comprising:   The base station apparatus according to claim 8, wherein the control means determines the size of the communication band to be secured based on the allocation request. The control means includes
Securing the communication band in response to receiving the allocation request related to the communication start of the mobile station,
The base station apparatus according to claim 8 or 9, wherein the communication band is released in response to reception of a release request for the radio resource transmitted from the core network or the mobile station in association with termination of communication of the mobile station. .   The base station apparatus according to claim 10, wherein when the communication band is released, the control unit preferentially assigns a communication band to be released to a device that has contributed to data traffic suppression when the communication band is secured. . The control means includes
Collecting communication service types provided by a plurality of other devices connected to the home network via the first communication means,
Based on a predetermined standard for the communication service type, identify a target device that should suppress data traffic from among the plurality of other devices,
Requesting the target device to suppress data traffic via the first communication means;
The base station apparatus of any one of Claims 8-11. The control means includes
Sending a bandwidth securing request to the first device connected to the home network via the first communication means,
The base station according to any one of claims 8 to 11, wherein the base station receives a response indicating the reservation of the communication band from the first device that has received the band reservation request via the first communication unit. apparatus. A communication means connectable to a cellular communication service user's home network;
Radio resources between the base station device and the mobile station when the base station device connected to the cellular network's core network via the home network and broadband communication line starts communication with the mobile station Control means for adjusting the amount of data transmitted or received from the communication unit to the in-home network so that a communication band corresponding to is secured between the base station device and the core network;
Information equipment equipped with. A control method for a base station device that is placed in a cellular communication service user's home network and is connected to the cellular network operator's core network via the home network and a broadband communication line,
Connection of data traffic flowing through at least one of the in-home network and the broadband line is connected to the in-home network in order to secure a communication band according to radio resources allocated to subordinate mobile stations with the core network In cooperation with other devices
Including methods. Determining a size of the communication band to be secured based on an allocation request transmitted from the core network or the mobile station to the base station device in order to request allocation of the radio resource to the mobile station;
16. The method of claim 15, further comprising: Starting adjustment of data traffic for securing the communication band in accordance with the start of communication of the mobile station, and releasing the communication band in accordance with the end of communication of the mobile station;
The method according to claim 15 or 16, further comprising:   18. The communication band to be released is preferentially assigned to a device that contributes to suppression of data traffic when the communication band is secured when releasing the communication band in response to the end of communication of the mobile station. the method of. The adjustment of the data traffic is
Collecting communication service types provided by a plurality of other devices connected to the home network, and data from the plurality of other devices based on a predetermined criterion for the communication service types. Identifying a target device for which traffic should be suppressed and requesting the target device to suppress data traffic;
The method according to claim 15, comprising: The adjustment of the data traffic is
Transmitting a bandwidth securing request to the first device connected to the home network, and receiving a response indicating securing of the communication bandwidth from the first device receiving the bandwidth securing request;
The method according to claim 15, comprising: A program for causing a computer to execute control processing related to a base station device,
The base station device is disposed in a cellular communication service user's home network, connected to the cellular communication company's core network via the home network and a broadband communication line,
The control process is
Connection of data traffic flowing through at least one of the in-home network and the broadband line is connected to the in-home network in order to secure a communication band according to radio resources allocated to subordinate mobile stations with the core network In cooperation with other devices
Including programs.   The control process determines the size of the communication band to be secured based on an allocation request transmitted from the core network or the mobile station to the base station apparatus in order to request allocation of the radio resource to the mobile station. The program of claim 21, further comprising determining. The control process is
Starting adjustment of data traffic for securing the communication band in accordance with the start of communication of the mobile station, and releasing the communication band in accordance with the end of communication of the mobile station;
The program according to claim 21 or 22, further comprising:

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