JP2008252375A - Communication method, communication system, and radio communication equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication method by which the radio resources of a base station can be effectively used, to provide a communication system, and to provide a base station device. <P>SOLUTION: The base station 2 recognizes the present use resources (the number of channels in use), and recognizes presence/no presence of a user terminal 1 that registers a BCMCS (Broadcast and Multicast Service). When a registered user terminal 1 is present and the number of the current resources in use exceeds a prescribed value, a query for distribution permission is made to a BCMC distribution base station controller 10 to confirm another base station for distributing content. Information about the other base station for distributing the content is acquired from the BCMC distribution base station controller 10, and the acquired information about the other base station is transmitted to the user terminal 1. When the user terminal 1 is subjected to hand-off to the other base station, a resource for distributing the content to the user terminal 1 is released. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a communication system that provides customers with broadcast services, multicast services, and the like.

  For example, as specified by 3GPP2, BCMCS (Broadcast and Multicast Service: hereinafter the same) is a service that distributes the same data to a large number of users, such as contents such as large-capacity movies and small-capacity news. And weather forecasting services can be provided to customers. These distributions are used not only for wireless communication but also for wired communication.

FIG. 1 is a diagram showing a basic configuration of BCMCS. The access authentication device 4 is a device for determining whether each user terminal 1 ₁ to 1 _N can enjoy the BCMCS service and giving authority, and the BCMCS control device 5 issues a BCMCS access key, The BCMCS content server 3 is a device intended to distribute content and to secure the distribution data.

The base stations 2 _{1 to} 2 _M always reserve resources for broadcast and multicast distribution (channels and slots: the same applies hereinafter), and direct the content from the BCMCS content server 3 to the user terminals 1 ₁ to 1 _N. To deliver. In addition, when performing communication using the space division multiple access (SDMA) system, the base stations 2 _{1 to} 2 _M cannot perform space multiplexing on resources allocated to the BCMCS service, and thus perform space 3 multiplexing. In this case, the number of resources used for distribution by BCMCS is three times that of normal communication. The reason for not performing spatial multiplexing communication is that when forming a beam forming with multi-antennas, the user terminal and the base station mutually calculate the phase and direct the radio waves in the direction in which the user terminals 1 ₁ to 1 _N exist. This is because when there is a user, it is necessary to output from the antenna uniformly without forming beam forming, and since this output is one-way communication, space division multiple access cannot be executed.

  FIG. 2 is a diagram modeling the relationship between channels, time slots, and spatial multiplexing in order to explain the concept of base station resources. This figure shows a time division communication (TDMA) three-division, spatial three-multiplex communication, and three-channel configuration as an example. In this case, the total number of resources is 27 (3 × 3 × 3). At this time, if broadcast or multicast data is distributed, three resources that are hatched are occupied. In addition, if there is only one time-multiplexed slot and there is enough distribution data, and all three time divisions are used in MCBCS, 9 (27/3) three times the normal communication (spatial multiplexing) It will occupy resources.

  FIG. 3 is a sequence diagram showing an outline of a procedure when the user terminal receives broadcast or multicast distribution. First, a user terminal issues a request for starting a ppp session to the base station, and the base station and the network switch perform authentication and give permission for the ppp session. In order to perform communication by multicast, the user terminal further issues a BCMCS registration request to the BCMCS control apparatus via the base station and the network switch. When permitting registration, the BCMCS control apparatus notifies the base station, and the base station records the user terminal and the BCMCS permission. Thereafter, when the base station receives a distribution request from the user terminal, the base station distributes the distribution data already received from the BCMCS content server to the user terminal. Of course, the base station must receive distribution data from the BCMCS content server regardless of the presence or absence of the user terminal.

In Patent Document 1, when the BCMCS service is interrupted or disabled in the BCMCS system, the base station can notify the mobile terminal of the suspension of the BCMCS service, thereby reducing the load of system resources. Methods and systems are disclosed.
JP-T-2006-512878

  As described above, a BCMCS (Broadcast and Multicast Service) content server transmits content to a base station regardless of the presence or absence of a BCMCS service request from a user terminal. First, resources (channels, slots) for distributing content from the server to user terminals are always secured. This creates a problem that resources that are finite for the base station cannot be used efficiently. In this case, in particular, in BCMCS in a communication system to which a space division multiple access (SDMA) system is applied, a spatial channel cannot be set for a channel for a base station to distribute content distributed from the server to a user terminal. Therefore, when the number of user terminals connected to the base station increases, it is not possible to effectively use radio resources.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a communication method, a communication system, and a wireless communication apparatus capable of effectively using limited wireless resources. It is in.

  In order to achieve the above object, a communication method of the present invention is a communication method in a communication system that distributes predetermined information distributed from a server via a network to a second wireless communication device via the first wireless communication device. The first wireless communication apparatus grasps a used resource grasping step for grasping a current used resource and a second wireless communication apparatus performing registration for acquiring the predetermined information on the network. The second wireless communication device grasping step and the use resource grasping step when the number of used resources exceeds a predetermined value, and the second wireless communication device grasping step performs the registration If it is determined that there is a second wireless communication device, an information acquisition step for acquiring information related to the third wireless communication device that distributes the predetermined information. And an information transmission step for transmitting the acquired information on the third wireless communication device to the second wireless communication device, and the second wireless communication device relates to the transmitted third wireless communication device. A communication connection determining step of receiving information and determining whether or not communication tangent to the third wireless communication device is possible based on the received information related to the third wireless communication device; A communication connection process execution step for executing a communication connection process to the third wireless communication apparatus, and the communication connection process to the third wireless communication apparatus. In the case of communication connection, a predetermined information receiving step for receiving the predetermined information via the third wireless communication device; the first wireless communication device; the second wireless communication device; When the communication connection to the wireless communication device is characterized in that it comprises a resource release step of releasing the resources for delivering said predetermined information to said second wireless communication device.

  In the communication connection determining step, the second wireless communication device includes in advance a list including a communicable wireless communication device capable of communicating with the first wireless communication device that is currently in communication connection. The communication-enabled wireless communication device having the highest communication priority with the second wireless communication device is set to be the next connection destination candidate, and the second wireless communication device communicates with the communication in the list. Determining whether the third wireless communication device corresponds to any of the possible wireless communication devices, thereby determining whether communication connection to the third wireless communication device is possible; In the execution step, in the determination, it is determined that the third wireless communication device can be connected to the third wireless communication device when the third wireless communication device corresponds to any of the communicable wireless communication devices in the list. In this case, the setting state of the list is controlled so that the third wireless communication apparatus becomes the next connection destination candidate, and communication connection processing to the third wireless communication apparatus is executed based on the control It is preferable to do.

  In the communication system, registration for acquiring the predetermined information on the network is retained, and the second wireless communication device receives the predetermined information via the third wireless communication device. Then, it is preferable to receive the predetermined information based on the held registration. In addition, the communication system preferably performs communication using a space division multiple tangent (SDMA) method.

  The communication system of the present invention is a communication system that distributes predetermined information distributed from a server to a second wireless communication device via the first wireless communication device, wherein the first wireless communication device Used resource grasping means for grasping the used resources, second wireless communication apparatus grasping means for grasping the second wireless communication apparatus performing registration for acquiring the predetermined information on the network, and the used resources When the number of used resources grasped by the grasping means exceeds a predetermined value, and when the second wireless communication apparatus grasping means finds that the registered second wireless communication apparatus is present A third wireless communication device that acquires information about the third wireless communication device that distributes the predetermined information, and transmits the acquired information about the third wireless communication device to the second wireless communication device. When the device information acquisition unit and the second wireless communication device are connected to the third wireless communication device, resources for distributing the predetermined information to the second wireless communication device are released. Resource releasing means, wherein the second wireless communication device receives the transmitted information related to the third wireless communication device, and based on the received information related to the third wireless communication device, A third wireless communication device confirmation means for determining whether or not a communication tangent to the third wireless communication device can be established; and as a result of the determination, When the communication means is connected to the third wireless communication device by the handover means for executing the communication connection processing to the wireless communication device and the communication connection processing, the predetermined information is transmitted via the third wireless communication device. Receive And having a predetermined information receiving means.

  The wireless communication device of the present invention is the first wireless communication device in a communication system that distributes predetermined information distributed from a server to a second wireless communication device via the first wireless communication device. Use resource grasping means for grasping current use resources; second wireless communication apparatus grasping means for grasping a second wireless communication apparatus performing registration for acquiring predetermined information on the network; and the use When the number of used resources grasped by the resource grasping means exceeds a predetermined value, and when the second wireless communication apparatus grasping means finds that there is a second wireless communication apparatus performing the registration In the third wireless communication, information related to the third wireless communication device that distributes the predetermined information is acquired, and the acquired information related to the third wireless communication device is transmitted to the second wireless communication device. When the location information acquisition unit and the second wireless communication device are connected to the third wireless communication device, resources for distributing the predetermined information to the second wireless communication device are released. Resource release means.

  In the present invention, for example, when the radio resources of the base station are insufficient, radio resources can be secured by handing off a user terminal registered to acquire predetermined information on the network to another base station. It is possible to effectively use radio resources in a certain base station.

Embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a diagram showing an example of the configuration of the communication system of the present invention. The communication system shown in FIG. 4 performs communication by an SDMA (space division multiple access) system, and includes user terminals (second wireless communication devices) 1 ₁ to 1 _N and a base station (first wireless communication device). A third wireless communication device) 2 ₁ to 2 _M , a switch 6 that connects the base stations 2 ₁ to 2 _M to the LAN / WAN, and whether or not each user terminal can enjoy the BCMCS service and authority The access authentication device 4 to be given, the BCMCS control device 5 that controls the issuance and authentication of the BCMCS access key, the BCMCS content provider 7, the content (predetermined information) is distributed, and the distribution data (predetermined information) BCMCS content server 3 for applying security, BCMCS node 8 connected to LAN / WAN, BCMCS node 8 and BCMCS content It includes a BCMCS router 9 connecting the Tsusaba 3, and a BCMC distribution base station controller 10 connected to the LAN / WAN. The BCMCS content server 3 may not be a server dedicated to BCMCS, as long as it can distribute BCMCS content.

Each of the base stations 2 _{1 to} 2 _M performs BCMCS registration (registration) on the network with the use resource grasping means 21 for grasping the current use resource (number of used channels) and the BCMCS control device 5. Terminal grasping means (second wireless communication apparatus grasping means) 22 for grasping the presence / absence of the user terminal 1 (registration for acquiring predetermined information) and the number of used resources grasped by the used resource grasping means 21 And when the terminal grasping means 22 finds that there is a registered user terminal 1, another base station (third wireless communication device) that distributes the content. Base station information acquisition means (third wireless communication apparatus information acquisition means) 23 for acquiring information related to, and transmitting information related to the acquired other base stations to the user terminal 1; Chromatography The terminal 1, when the communication connection to another base station, and a resource release means 24 for releasing the resources for delivering content to the user terminal 1.

Each of the user terminals 1 ₁ to 1 _N receives the transmitted information regarding the other base station, and determines whether or not communication tangent to the other base station is possible based on the received information regarding the other base station. Base station confirmation means (third wireless communication apparatus confirmation means) 11 and handover means for executing communication connection processing to another base station when it is determined that communication connection to another base station is possible as a result of the determination 12 and content receiving means (predetermined information receiving means) 13 for receiving content via another base station when connected to another base station by communication connection processing.

Each of the user terminals 1 ₁ to 1 _N is called a candid table (Candidate Table), which can communicate with a currently connected base station, for example, a base station candidate list including adjacent base stations ( (Not shown). The base station candidate list ranks, for example, the base stations (third wireless communication devices) having the best communication state (control information signal reception level, etc.) with the terminal so that the communication priority is the highest. Is set to be the next connection destination candidate.

  The BCMC distribution base station control device 10 acquires the position information of the base station, the distribution information of the base station, and the usage status of the user, and manages the BCMC distribution information of each base station. The position information of the base station can be obtained by GPS information from the base station or when the administrator directly inputs the position information. The base station distribution information can be obtained by always accessing the BCMC distribution base station control device 10 and obtaining permission before the base station starts the BCMC distribution. The BCMC distribution base station control device 10 can also request the base station to stop distribution. The usage status of the user can be obtained from the base station and the BCMCS control device.

  The BCMC distribution base station control device 10 determines permission or non-permission information from the base station position information, base station distribution information, and user usage status in response to a distribution permission inquiry from the base station. Respond to the inquiring base station. At this time, if there is another base station candidate, it is returned to the inquiring base station.

  FIG. 5 is a flowchart for explaining the operation of the base station. The base station (first wireless communication device) 2 grasps the current used resource (number of used channels) (step 100), and further the user terminal (second wireless communication device) 1 that is registering BCMCS. The presence or absence is ascertained (step 110). Next, it is determined whether or not there is a registered user terminal 1 (step 120). If there is a registered user terminal 1, it is determined whether or not the current number of used resources exceeds a predetermined value. Determination is made (step 130). When the current number of used resources exceeds a predetermined value, the distribution permission is granted to the BCMC distribution base station control apparatus 10 in order to confirm another base station (third wireless communication apparatus) that distributes the content. An inquiry is made (step 140). Next, the information regarding the other base station which distributes content is acquired from the BCMC distribution base station control device 10 (step 150), and the acquired information regarding the other base station is transmitted to the user terminal 1 (step 160). When the user terminal 1 is communicatively connected to another base station, resources for distributing content to the user terminal 1 are released (step 170).

  If there is no registered user terminal 1 in step 120, the process ends (step 180). In step 130, if the current number of used resources does not exceed the predetermined value, the process is terminated (step 180).

  FIG. 6 is a flowchart for explaining the operation of the user terminal. The user terminal 1 receives the information on the other base station transmitted from the base station 2 (step 200), and based on the received information on the other base station, communicates with another base station (ppp session registration). It is determined whether or not it is possible (step 210). That is, it is determined whether or not another base station corresponds to one of the base stations in the base station candidate list. As a result, if another base station corresponds to the base station in the base station candidate list and it is determined that communication connection to another base station is possible, the other base station becomes the next connection destination candidate. Thus, the setting state of the base station candidate list is controlled. Based on the control of the setting state of the base station candidate list, communication connection processing (handover) to another base station is executed (step 220), and content is received from the other base station (step 230). In step 210, when another base station is not included in the base station candidate list and cannot be connected to another base station, the user terminal 1 receives content from the current base station 2 (step 210). 240).

  FIG. 7 is a sequence diagram illustrating an outline of a procedure when the user terminal receives BCMC distribution. It is assumed that the user terminal has completed registration of the ppp session with the base station (BS1) and further has completed registration with the BCMCS. First, when a BCMCS distribution request is made from the user terminal to the base station (BS1), the base station (BS1) confirms the distribution base station when the number of currently used resources exceeds a predetermined value. Then, a distribution permission inquiry is made to the BCMC distribution base station controller. The BCMC distribution base station control device determines whether or not to permit distribution based on the location information of the base station, the distribution information of the base station, and the usage status of the user, and the distribution by the base station (BS1) is performed. If not permitted, another base station (BS2) is introduced to the base station (BS1). Next, the base station (BS1) introduces another base station (BS2) to the user terminal and requests a handover (H / O) to the other base station (BS2). The introduction content notifies the user terminal of a color code or the like unique to the base station (BS2) that can identify the base station.

  The user terminal periodically stores the received SINR (Signal to Interference plus Noise Ratio) value and the like of other base stations and the currently communicating base station in the candy date table. From the base station (BS1), the base station (BS1) When the handover (H / O) information to the station (BS2) is received, it is confirmed whether or not another base station (BS2) exists in the candy date table. When the base station (BS2) exists, if the SINR value is larger than the specified value, the priority of the base station (BS2) in the base station candidate list called a candy date table is set in order to perform handover to the base station (BS2). increase. The user terminal refers to the candy date table, and is handed over to the base station (BS2) having a higher priority, and automatically transmits re-registration of the pp session to the base station (BS2). Note that the content set with a high priority in the candy date table is changed when the BCMCS registration is released or another base station is introduced from the base station. When the user terminal is handed over to the base station (BS2), the base station (BS1) releases resources for distributing content to the user terminal.

  When there is a re-registration of the pp session from the user terminal, the base station (BS2) performs authentication and response, and gives permission to the pp session registration of the user terminal. Further, the user terminal automatically transmits a BCMC distribution request to the base station (BS2). Since it is unknown whether this user terminal is registering BCMCS, the base station (BS2) makes an inquiry for registration confirmation to the BCMCS control apparatus. The user terminal has already registered the BCMCS with the BCMCS control apparatus via the base station (BS1), and the BCMCS control apparatus holds the registration of the BCMCS of the user terminal. Based on the registration, a delivery-permitted message is transmitted to the base station (BS2). The base station (BS2) informs the user terminal of BCMC receivable information such as channel information and an access key, and starts downloading content from the BCMCS content server 3. When the user terminal changes the channel according to the information received from the base station (BS2) and accesses the distribution channel, the base station 2 distributes the content downloaded from the BCMCS content server 3 to the user terminal.

  As described above, the present invention can secure radio resources by handing off user terminals registered in the BCMCS to other base stations when the radio resources of the base stations are insufficient. In this way, it is possible to effectively use radio resources.

  In the above-described embodiment of the present invention, a system for distributing BCMCS content from the BCMCS content server 3 to the user terminal 1 via the base station 2 has been described. It can also be realized in a system, a base station-vehicle communication system, a vehicle-vehicle communication system, and the like. An information home appliance network system, for example, accesses a home server via a network from a terminal such as a mobile phone, and connects various devices (from AV home appliances and white goods home appliances) installed in the home through the home server. In this case, the user terminal obtains information (predetermined information) for controlling the various devices distributed from the home server via the network. In such an information home appliance network system, the terminal such as the mobile phone corresponds to the user terminal 1 (second wireless communication device) in the embodiment of the present invention, and the terminal such as the mobile phone is connected for communication. The counterpart device is the base station 2 (first wireless communication device, third wireless communication device) in the embodiment of the present invention, and the home server is the BCMCS content in the embodiment of the present invention. It corresponds to the server 3.

Further, the base station-vehicle communication system is configured to perform communication between a base station installed on the road and a mobile station mounted on the vehicle. In this case, the vehicle (mobile station) may The base station corresponds to the user terminal 1 (second radio communication device) in the embodiment, and the base station in the base station 2 (first radio communication device, third radio communication device) in the embodiment of the present invention, An information distribution device such as a server configured above the base station corresponds to the BCMCS content server 3 in the embodiment of the present invention.
Furthermore, when the first vehicle (first mobile station) transmits data to the base station when the first vehicle (first mobile station) transmits data to the base station, the vehicle-to-vehicle communication system The vehicle (first mobile station) can transmit data to the base station via the second vehicle (second mobile station). In this case, the first vehicle (first mobile station) corresponds to the user terminal 1 (second wireless communication device) in the embodiment of the present invention, and the second vehicle (second mobile station). Distributes data to the base station 2 (first radio communication device, third radio communication device) in the embodiment of the present invention and to the first vehicle (first mobile station). Other vehicles (other mobile stations), base stations, servers, and the like correspond to the BCMCS content server 3 in the embodiment of the present invention.

  Further, in the case of multicast distribution, pay communication is used, and the BCMCS control apparatus authenticates user terminals, so that it is possible to manage the number of user terminals used. On the other hand, broadcast distribution is a free distribution service, and it is difficult for a network administrator to specify the presence or absence of a user. However, the present invention can be applied to broadcasts if the presence or absence of a user can be specified.

It is a figure which shows the basic composition of BCMCS. In order to explain the concept of base station resources, it is a diagram modeling the relationship between channels, time slots, and spatial multiplexing. It is a sequence diagram which shows the procedure outline | summary when a user terminal receives broadcast or multicast delivery. It is a figure which shows an example of a structure of the communication system of this invention. It is a flowchart explaining operation | movement of a base station. It is a flowchart explaining operation | movement of a user terminal. It is a sequence diagram which shows the procedure outline | summary when a user terminal receives broadcast or multicast delivery.

Explanation of symbols

1 ₁ to 1 _N user terminal (second wireless communication device)
2 _{1 to} 2 _M base stations (first wireless communication device, third wireless communication device)
3 BCMCS content server 4 Access authentication device 5 BCMCS control device 6 Switch 7 BCMCS content provider 8 BCMCS node 9 BCMCS router 10 BCMC distribution base station control device 11 Base station confirmation means (third wireless communication device confirmation means)
12 Handover means 13 Content receiving means (predetermined information receiving means)
21 Used resource grasping means 22 Terminal grasping means (third wireless communication apparatus grasping means)
23 Base station information acquisition means (third wireless communication apparatus information acquisition means)
24 Resource release means

Claims (6)

In a communication method in a communication system for distributing predetermined information distributed from a server via a network to a second wireless communication device via a first wireless communication device,
The first wireless communication device is
Use resource grasping step to grasp current use resource,
A second wireless communication device grasping step for grasping a second wireless communication device performing registration for acquiring the predetermined information on the network;
When the number of used resources obtained in the used resource grasping step exceeds a predetermined value, and in the second wireless communication device grasping step, it is grasped that there is the second wireless communication device performing the registration. If so, an information acquisition step of acquiring information related to the third wireless communication device that distributes the predetermined information;
An information transmission step of transmitting the acquired information about the third wireless communication device to the second wireless communication device;
The second wireless communication device is
A communication connection that receives information about the transmitted third wireless communication device and determines whether or not a communication tangent to the third wireless communication device is possible based on the received information about the third wireless communication device A decision step;
As a result of the determination, if it is determined that communication connection to the third wireless communication device is possible, a communication connection processing execution step for executing communication connection processing to the third wireless communication device;
A predetermined information receiving step of receiving the predetermined information via the third wireless communication device when connected to the third wireless communication device by the communication connection process;
The first wireless communication device is
A resource releasing step for releasing resources for distributing the predetermined information to the second wireless communication device when the second wireless communication device is connected to the third wireless communication device;
A communication method comprising: In the communication connection determining step,
The second wireless communication apparatus includes a list including a communicable wireless communication apparatus capable of communicating with the first wireless communication apparatus that is currently in communication connection, and the list includes the second wireless communication apparatus. The communication-enabled wireless communication device with the highest communication priority with the device is set to be the next connection destination candidate,
When the second wireless communication apparatus determines whether the third wireless communication apparatus corresponds to any of the communicable wireless communication apparatuses in the list, the second wireless communication apparatus moves to the third wireless communication apparatus. Determine whether communication connection is possible,
In the communication connection process execution step,
In the determination, if it is determined that the third wireless communication apparatus corresponds to any of the communicable wireless communication apparatuses in the list and the communication connection to the third wireless communication apparatus is possible, The setting state of the list is controlled so that the third wireless communication apparatus becomes the next connection destination candidate, and communication connection processing to the third wireless communication apparatus is executed based on the control. The communication method according to claim 1. In the communication system, a registration for obtaining the predetermined information on the network is retained,
The step of the second wireless communication device receiving the predetermined information via the third wireless communication device receives the predetermined information based on the stored registration. Item 3. The communication method according to Item 1 or 2.   4. The communication method according to claim 1, wherein the communication system performs communication by a space division multiple tangent (SDMA) system. In a communication system that distributes predetermined information distributed from a server to a second wireless communication device via a first wireless communication device,
The first wireless communication device is:
A used resource grasping means for grasping current used resources;
Second wireless communication device grasping means for grasping a second wireless communication device performing registration for obtaining the predetermined information on the network;
When the number of used resources grasped by the used resource grasping means exceeds a predetermined value, and the second wireless communication apparatus grasping means grasps that there is the registered second wireless communication apparatus. In this case, a third wireless communication apparatus that acquires information related to the third wireless communication apparatus that distributes the predetermined information and transmits the acquired information related to the third wireless communication apparatus to the second wireless communication apparatus. Information acquisition means;
When the second wireless communication apparatus is connected to the third wireless communication apparatus for communication, the second wireless communication apparatus has resource release means for releasing resources for distributing the predetermined information to the second wireless communication apparatus. And
The second wireless communication device is:
Receiving the transmitted information relating to the third wireless communication device, and determining whether communication tangent to the third wireless communication device is possible based on the received information relating to the third wireless communication device; Wireless communication device confirmation means,
As a result of the determination, if it is determined that communication connection to the third wireless communication apparatus is possible, handover means for executing communication connection processing to the third wireless communication apparatus;
A predetermined information receiving means for receiving the predetermined information via the third wireless communication device when connected to the third wireless communication device by the communication connection process;
A communication system characterized by the above. The first wireless communication device in a communication system that distributes predetermined information distributed from a server to a second wireless communication device via the first wireless communication device,
A used resource grasping means for grasping current used resources;
Second wireless communication device grasping means for grasping a second wireless communication device performing registration for acquiring predetermined information on the network;
When the number of used resources grasped by the used resource grasping means exceeds a predetermined value, the second wireless communication apparatus grasping means recognizes that there is a second wireless communication apparatus performing the registration. A third wireless communication device that acquires information related to the third wireless communication device that distributes the predetermined information and transmits the acquired information related to the third wireless communication device to the second wireless communication device. Information acquisition means;
Resource release means for releasing resources for distributing the predetermined information to the second wireless communication device when the second wireless communication device is connected to the third wireless communication device. ,
A wireless communication apparatus.

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