JP2013038494A - Wireless base station, wireless lan system, data transmission/reception method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless base station capable of determining an order of priority of communication with ease.SOLUTION: A wireless base station 1 according to one embodiment of the present invention is used for a wireless LAN system encrypting a packet and transmitting/receiving data by using a communication software. The wireless base station 1 comprises: terminal communication data acquisition means 11 acquiring a communication type on the basis of the data received from a wireless terminal (a wireless LAN terminal 2) at negotiation with the wireless terminal; and terminal communication data control means 12 determining whether or not the communication type desired for data transmission/reception with a communication partner side is sound communication using the communication software or moving picture communication on the basis of the acquired communication type, and making the transmission/reception with the communication partner side by the sound communication using the communication software or the moving picture communication take preference over the other communication.

Description

  The present invention relates to a wireless base station, a wireless LAN (Local Area Network) system, a data transmission / reception method, and a program.

  In recent years, many high-function mobile phones such as smartphones equipped with various OSs, various software, and WiFi (Wireless Fidelity) wireless communication functions, such as iPhone (registered trademark), have appeared. Is being introduced and used in business.

  In addition to individuals, companies and companies can install free communication software such as Skype (registered trademark) and Google (registered trademark) Talk (Google Talk) on smartphones instead of wireless IP phones. Communication costs due to free calls including video calls and cheap calls to regular phones and mobile phones between employees who have installed Skype (registered trademark) by connecting to the Internet via a mobile phone network or WiFi wireless LAN system There are also increasing cases of reducing (see Patent Document 1).

  However, Skype (registered trademark) communication may use a bandwidth of several hundreds Kbps at the maximum, and the use of Skype (registered trademark) by mobile phone operators is restricted in the conventional Internet communication via the mobile phone network. In many cases, it cannot be used in the first place, or the quality of the call is degraded due to the lack of bandwidth or delay of the cellular phone network.

  Therefore, in order to realize stable communication in a company or in a private home, a method of using Skype (registered trademark) via a WiFi wireless LAN system capable of high-speed communication compared to a mobile phone network is generally used. It is the target.

  However, with respect to Skype (registered trademark) communication via a WiFi network in a company, even if there is no packet loss or delay in the Internet, a large number of smartphones and personal computers (hereinafter referred to as PC and PC) in the same WiFi area. Wireless LAN terminal is connected and the WiFi area band is occupied by data communication other than voice calls, or when a wireless IP phone is originally installed in the company and the voice of the wireless IP phone is When an environment in which communication is preferentially processed is constructed, there is a problem in that there is a possibility that deterioration in call quality or image quality during a video call may occur on the wireless LAN system.

  By the way, Patent Document 2 discloses a technique for determining a priority order of a plurality of packets based on a flag which is priority information and transmitting the packets based on the priority order.

JP 2008-301338 A JP 2006-115528 A

  In the technique of Patent Document 2, it is necessary to add a flag indicating a communication type to communication data, and determination of priority is complicated.

  An object of the present invention is to provide a wireless base station, a wireless LAN system, a data transmission / reception method, and a program that solve the above-described problems.

  A wireless base station according to an aspect of the present invention is a wireless base station used in a wireless LAN system that transmits and receives data by encrypting a packet using communication software, and when the wireless terminal negotiates with the wireless terminal, Terminal communication data acquisition means for acquiring a communication type based on data received from the terminal, and a communication type desired to be transmitted / received to / from a communication partner side based on the acquired communication type is voice communication or video communication using the communication software Terminal communication data control means for determining whether or not voice communication or video communication using the communication software with the communication partner is prioritized over other communication.

  A wireless LAN system according to an aspect of the present invention includes a plurality of the wireless base stations, wireless terminals connected to the wireless base stations, and control means for controlling the plurality of wireless base stations.

  A data transmission / reception method according to an aspect of the present invention is a data transmission / reception method in a wireless LAN system that transmits / receives data by encrypting a packet using communication software, and when the wireless terminal negotiates with the wireless terminal A step of acquiring a communication type based on the data received from the communication type, and based on the acquired communication type, whether the communication type desired to be transmitted / received to / from the communication partner is voice communication or video communication using the communication software. Determining and prioritizing transmission / reception of voice communication or video communication using the communication software with the communication partner side over other communication.

  A program according to an embodiment of the present invention is a program for executing a data transmission / reception method in a wireless LAN system that transmits and receives data by encrypting a packet using communication software, and when the computer negotiates with a wireless terminal A step of acquiring a communication type based on data received from the wireless terminal, and a communication type desired to be transmitted / received to / from a communication partner based on the acquired communication type is voice communication or video communication using the communication software And a step of giving priority to transmission / reception of voice communication or video communication using the communication software with the communication partner side over other communication is executed.

  According to the present invention, it is possible to provide a wireless base station, a wireless LAN system, a data transmission / reception method, and a program that can easily determine the communication priority.

1 is a configuration block diagram showing a wireless LAN system according to a first embodiment of the present invention. It is a block diagram which shows the wireless LAN system of Embodiment 2 of this invention. It is a block diagram showing a communication system to which a wireless LAN system according to a second embodiment of the present invention is applied. It is a block diagram which shows a radio base station. It is a block diagram which shows a radio | wireless terminal. It is a flowchart which shows operation | movement of a wireless base station. It is a flowchart which shows operation | movement of a radio | wireless terminal. It is a figure which shows an example of a priority determination table. It is a figure which shows an example of a communication band determination table. It is a figure which shows an example of a communication quality determination table. It is a figure which shows an example of the warning notification screen by a radio | wireless terminal.

  Hereinafter, a radio base station, a wireless LAN system, a data transmission / reception method, and a program according to an embodiment of the present invention will be described. However, the present invention is not limited to the following embodiment. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate.

  Here, the wireless base station, the wireless LAN system, the data transmission / reception method and the program according to the embodiment of the present invention are VoIP (Voiceover Internet Protocol) in peer-to-peer communication using the Internet with a smartphone which is an example of a wireless LAN terminal, for example. Communication software that performs real-time communication such as voice communication, such as “Skype (registered trademark)” provided by Skype Technology, and “Google (registered trademark) Talk (GoogleTalk)” provided by Google When performing voice communication, etc., it is possible to preferentially process smartphone VoIP voice communication over data communication and other wireless LAN terminal communication, thereby preventing communication quality degradation in a wireless LAN system environment. .

<Embodiment 1>
A radio base station and a wireless LAN system according to the present embodiment will be described. FIG. 1 is a block diagram showing a configuration example of a wireless LAN system according to the present embodiment.

  In FIG. 1, the wireless LAN system according to the present embodiment includes a wireless base station 1 and other wireless base stations 101 (the internal structure is the same as that of the wireless base station 1, and detailed description thereof is omitted), a smartphone, and the like. A plurality of wireless LAN terminals 2 (other wireless LAN terminals are not shown).

  In these wireless base stations 1 and other wireless base stations 101 and wireless LAN terminals 2, when performing voice communication or video communication (video communication) using communication software, that is, when negotiating with each other, the wireless base station 1 determines the communication type based on the data acquired from the wireless LAN terminal 2, and preferentially transmits voice communication and video communication using communication software.

  Specifically, the wireless base station 1 and other wireless base stations 101 are wireless base stations that control the wireless communication connection with the wireless LAN terminal 2. That is, the wireless base station 1 and other wireless base stations 101 include elements for realizing, for example, a general WiFi wireless LAN system. In FIG. 1, communication data with the wireless LAN terminal 2 is always acquired. A terminal communication data acquisition unit 11 that stores data and a terminal communication data control unit 12 that controls communication of the wireless LAN terminal 2 based on the communication data of the wireless LAN terminal 2 acquired by the terminal communication data acquisition unit 11. Extracted and shown.

  Based on the communication data acquired from the wireless LAN terminal 2, the terminal communication data acquisition unit 11 detects communication with a wireless IP phone, a PC, etc., and acquires a use band. That is, the terminal communication data acquisition unit 11 is a management packet of communication data acquired from the wireless LAN terminal 2, such as a management packet (Probe, Association, etc.) standardized by IEEE (Institut of Electrical and Electrical Engineers) 802.11, for example. Based on the unencrypted packet such as, whether the communication is communication using communication software, the communication type of each communication (voice communication, video communication, instant message, file transfer, etc.) and the bandwidth used for each communication, etc. get.

  At this time, since communication software information is included in the unencrypted packet if communication is performed using the communication software, the terminal communication data acquisition unit 11 performs communication based on the communication software information. It can be determined whether or not communication is performed using communication software.

  The terminal communication data control unit 12 determines whether or not the communication is communication using the communication software acquired by the terminal communication data acquisition unit 11, based on the communication type or band used for each communication, It is determined whether or not the video communication is performed, and the voice communication or the video communication using the communication software is preferentially transmitted to the wireless IP phone or the PC on the communication partner side with respect to the other communication.

  Here, the terminal communication data control unit 12 adjusts the backoff time (random number × slot time) of the CSMA / CA (Carrier Sense Multiple Access Collision Avidance) method, thereby enabling voice communication of the wireless LAN terminal 2 and the like. The packet transmission order of data communication and voice communication or video communication using communication software, that is, the priority of each communication is determined, and voice communication or video communication using communication software is prioritized over other communication.

  The wireless LAN terminal 2 includes, for example, an element for realizing a function as a general smartphone. In FIG. 1, a terminal communication information notification unit 22 that notifies the wireless base station 1 of information related to communication is extracted and shown. Yes. The terminal communication information notifying unit 22 uses a management packet [Probe, Association Information Elements, etc.] standardized by IEEE 802.11, whether or not the communication is communication using communication software, communication start and communication Information on the type and band used is transmitted to the radio base station 1.

  With such a configuration, it is possible to prioritize the transmission order of voice communication or video communication using communication software over other data communication. In particular, in this embodiment, communication software that should be prioritized over other communication based on information related to communication in data (for example, a management packet of the data) acquired by the wireless base station from the wireless LAN terminal 2 is used. Since voice communication or video communication is identified, the priority communication type can be easily identified with respect to other communications.

<Embodiment 2>
A wireless base station, a wireless LAN system, a data transmission / reception method, and a program according to the present embodiment will be described. FIG. 2 is a block diagram illustrating a configuration example of the wireless LAN system according to the present embodiment.

  The wireless LAN system according to the present embodiment has substantially the same configuration as that of the wireless LAN system according to the first embodiment, but the access point of the wireless LAN terminal 2 is assigned to another wireless base station according to the available bandwidth of the wireless base station. It can be switched to a station or the like.

  More specifically, as shown in FIG. 2, the radio base station 1 and other radio base stations 101 of the present embodiment are connected to other elements capable of switching connections in addition to the elements of the first embodiment. A switching notification unit 13 that notifies the wireless base station 101 to the wireless LAN terminal 2 is provided.

  When the radio base station 1 cannot secure a bandwidth necessary for voice communication or video communication using the communication software, the switching notification unit 13 manages a management packet [Beacon (Beacon Information Elements, etc.) standardized by IEEE 802.11. ] Is used to notify the wireless LAN terminal 2 of the switching information to the other wireless base station 101.

  The switching information addressed to the wireless LAN terminal 2 includes basic information [IP (Internet Protocol) address, MAC (Media Access Control) address, ESSID (ESSID ( Extended Service Set Identifier)].

  Beacon is a wireless LAN terminal periodically in order to notify the function supported by the operating wireless base station 1 to the wireless LAN terminal 2 and the ID (SSID: Service Set IDentifier) of BSA (Basic Service Area). 2 is a frame to be transmitted.

  In addition to the elements of the wireless LAN terminal of the first embodiment, the wireless LAN terminal 2 of the present embodiment constantly acquires communication data with the wireless base station 1 and other wireless base stations 101 to communicate with each wireless base station. A base station communication data acquisition unit 21 for calculating quality, a communication quality notification unit 23 for notifying the user of the wireless LAN terminal 2 of switching information for connection to another wireless base station 101 or a mobile phone network, When the switching information to the other wireless base station 101 is notified from the station 1 to the wireless LAN terminal 2, the communication quality of the other wireless base station 101 of the connection switching candidate calculated by the base station communication data acquisition unit 21 is determined. A communication quality determination unit 24 that is determined based on a reference, and a switching permission determination unit 25 that determines permission / non-permission of switching the connection of the wireless LAN terminal 2 to another wireless base station 101 are provided.

  The base station communication data acquisition unit 21 always acquires communication quality from transmission packets (such as Beacon) from the wireless base station 1 or other wireless base stations 101 to the wireless LAN terminal 2.

  The terminal communication information notification unit 22 is a wireless base station that can be handed over (switched by connection) to the wireless LAN terminal 2 in addition to information on whether the communication is communication using communication software, information on the start of communication, communication type, and bandwidth used. Is notified to the radio base station 1.

  The communication quality notification unit 23 emits a warning sound or displays warning information on a monitor so that a user of the wireless LAN terminal 2 can switch connection to another wireless base station 101 or connect to a mobile phone network. Notification of communication quality degradation due to.

  The communication quality determination unit 24 uses communication quality such as a received signal strength (RSSI: Received Signal Strength Indicator) or a signal-to-noise ratio (SNR) from the radio base station 1 or another radio base station 101. Thus, it is determined whether or not the communication quality of the other radio base station 101 that is a connection switching candidate is equal to or higher than a criterion (threshold).

  Based on the determination result of the communication quality determination unit 24, the switching permission determination unit 25 determines whether the communication quality of the other radio base station 101 that is a connection switching candidate is equal to or higher than the threshold, and the communication quality is equal to or higher than the threshold. In this case, a connection to another radio base station 101 is requested.

  On the other hand, when the communication quality is lower than the threshold and there is no other wireless base station capable of switching connection, the switching permission determining unit 25 connects to the mobile phone network and alerts the user of the wireless LAN terminal 2 to the warning information. Is notified via the communication quality notification unit 23.

  As described above, when there is a possibility that the communication quality of voice communication or video communication using communication software may be deteriorated due to insufficient bandwidth of the wireless base station, the wireless LAN terminal 2 is connected to another wireless base station 101 or a mobile phone network. You can switch the connection. In particular, since it is determined whether or not the communication quality of a radio base station that is a connection switching candidate is equal to or higher than a threshold value, it is possible to avoid a decrease in communication quality of voice communication or video communication.

  Next, a communication system using the above-described wireless LAN system will be described. FIG. 3 is a block diagram showing a configuration example of the communication system according to the present embodiment. FIG. 4 is a block diagram illustrating a configuration example of the radio base station of FIG. FIG. 5 is a block diagram showing a configuration example of the wireless LAN terminal of FIG.

  3, the wireless LAN system 100 includes wireless LAN terminals 2a, 2b,..., Wireless LAN terminals 3a, 3b, etc. such as a PC, wireless LAN terminals 2a, 2b,. , Which controls the wireless communication connection with the terminals 3a, 3b,..., And the system control device 4 which performs various controls in communication with the wireless base stations 1a, 1b,. And comprising.

  In the wireless LAN system 100, as shown in FIG. 3, wireless base stations 1a, 1b,... (AP: access point) are connected to the system control device 4, and the wireless base stations 1a, 1b,. The wireless LAN terminals 2a, 2b,... And the wireless LAN terminals 3a, 3b,.

  The system control device 4 performs various controls in communication as the wireless LAN system 100, such as handover between a plurality of wireless base stations 1a, 1b,..., And manages information related to the used bandwidth and free bandwidth of the wireless base station. Communication with the Internet 5 and the wired LAN terminal 6 is also possible.

  The server group 7 communicates using communication software, such as login authentication of the wireless LAN terminals 2a, 2b,... And establishment of a session with a communication partner via the Internet connection via the wireless LAN system 100 or the mobile phone network 8. Various controls are performed.

  The wireless base stations 1a, 1b,... Are connected with the wireless LAN terminals 2a, 2b,... And the wireless LAN terminals 3a, 3b,. An antenna 30 and a wireless communication unit 31 for performing wireless communication, a wired communication unit 32 for performing wired communication with the system control device 4 and the like, and a control unit 33 (for controlling the entire wireless base station 1) For example, a CPU (central processing unit) or the like) and a communication determination unit 34 that determines voice communication or moving image communication using communication software from other communication. Further, the wireless base stations 1a, 1b, ... have a communication data acquisition unit 35 that acquires communication data of the wireless LAN terminals 2a, 2b, ..., a timer 36 that adds time information to the acquired communication data, A communication data analysis unit 37 that analyzes the use band of the acquired communication data, and a storage unit 38 that stores the acquired communication data and the like. The storage unit 38 stores a priority determination table 38a and a communication band determination table 38b.

  The wireless LAN terminals 2a, 2b,..., As with the wireless LAN terminal 2 shown in FIG. 5, the antenna 40 and the wireless for performing wireless LAN communication with the wireless base stations 1a, 1b,. Communication control such as transmission output by the LAN communication unit 41, the antenna 42 and the wireless modem 43 for communicating with the cellular phone network 8, the communication partner and the wireless LAN communication unit 41 and the wireless modem 43, and the entire wireless LAN terminal 2 And a control unit 44 (for example, a CPU) that performs control. Further, the wireless LAN terminals 2a, 2b,... Include a communication data acquisition unit 45 that acquires communication data of the wireless base stations 1a, 1b,..., And a communication data analysis unit that analyzes communication quality from the acquired communication data. 46, a storage unit 47 for storing communication data and communication software acquired from the radio base stations 1a, 1b,..., A display unit 48 for displaying various information such as warning information and video for video communication, and audio A receiving section 49 and a transmitting section 50 for carrying out a call are provided. The storage unit 47 stores a communication quality storage unit 47a for storing communication quality, a communication quality determination table 47b, and a priority determination table 38a. Here, the priority determination table 38a of the wireless LAN terminals 2a, 2b,... And the priority determination table 38a of the wireless base stations 1a, 1b,.

  The processing operations of the terminal communication data acquisition unit 11, the terminal communication data control unit 12, and the switching notification unit 13 of the radio base station 1 shown in FIG. 2 are stored in the storage unit 38 by the control unit 33 of the radio base station 1. This can be realized by executing the program. The processing operations of the base station communication data acquisition unit 21, the terminal communication information notification unit 22, the communication quality notification unit 23, the communication quality determination unit 24, and the switching permission determination unit 25 of the wireless LAN terminal 2 illustrated in FIG. This can be realized by the control unit 44 of the terminal 2 executing the program stored in the storage unit 47.

  Next, a data transmission / reception method using the above-described communication system will be described together with operations of the wireless base station 1 and the wireless LAN terminal 2. FIG. 6 is a flowchart showing the operation of the radio base station 1. FIG. 7 is a flowchart showing the operation of the wireless LAN terminal 2. FIG. 8 is a diagram illustrating an example of the priority determination table 38a. FIG. 9 is a diagram illustrating an example of the communication band determination table 38b. FIG. 10 is a diagram illustrating an example of the communication quality determination table 47b. FIG. 11 is a diagram illustrating an example of a warning notification screen by the wireless LAN terminal 2.

  Here, the process shown in FIG. 6 can be realized by the control unit 33 of the wireless base station 1 executing a program stored in the storage unit 38, and the process shown in FIG. This can be realized by the unit 44 executing the program stored in the storage unit 47.

First, the operation of the radio base station 1 will be described with reference to the flowchart of FIG.
The wireless base station 1 transmits communication data of a connected wireless LAN terminal 2 (communication between wireless LAN terminals, communication between the wireless LAN terminal 2 and the wired LAN terminal 6, communication between the wireless LAN terminal 2 and the wireless base station 1). ) Is always acquired by the communication data acquisition unit 35 (S1), a time stamp is given to the acquired communication data from the timer 36, and then the communication data analysis unit 37 determines the radio base station 1 based on the communication data. Used bandwidth and free bandwidth are calculated and recorded in the storage unit 38 together with the communication data (S2).

  When the connected wireless LAN terminal 2 starts communication, the communication determination unit 34 determines whether the communication data from the wireless LAN terminal 2 includes information related to communication using the communication software, and uses the communication software. It is determined whether the communication is other communication or other communication (S3).

  When the communication of the wireless LAN terminal 2 is data communication other than communication using communication software (S3: No), the control unit 33 adjusts the bandwidth used for data communication based on the information on the free bandwidth of the wireless base station 1. Then, transmission is performed with low priority (S5), and acquisition of communication data is continued (S1).

  On the other hand, when the communication of the wireless LAN terminal 2 is communication using communication software (S3: Yes), the communication type of communication using the communication software notified from the wireless LAN terminal 2 (voice communication, video communication, instant message, File transmission, etc.) and information on the bandwidth used for each communication and information on other radio base stations 101 that can be handed over are analyzed by the communication data analysis unit 37 and recorded in the storage unit 38 (S4), and the communication type is voice communication. Or it is determined whether it is video communication (S6).

  The control unit 33 refers to the communication band determination table 38b stored in the storage unit 38 as shown in FIG. 9 to determine a necessary free band according to the communication type (for example, “voice communication” is 80 kbps. It is determined that the above free bandwidth is necessary) (S7). In FIG. 9, the communication type “first voice communication” indicates voice communication using a wireless IP phone, and “second voice call” and “first video communication” indicate voice communication and video communication using communication software. All other communications are handled as “data communications”, and necessary bandwidth [80 kbps to 500 kbps] is stored in association with each communication type.

  Further, the control unit 33 refers to the priority determination table 38a stored in the storage unit 38 as shown in FIG. 8 to determine the priority according to the communication type (for example, “voice communication” is used bandwidth). For communication with low priority, the bandwidth to be used is adjusted according to the free bandwidth (steps S5 and S8). Here, in FIG. 8, “first voice communication” of the communication type indicates voice communication by wireless IP telephone, and “second voice call” and “first moving picture communication” indicate voice communication and moving picture communication using communication software. All other communications are treated as “data communications”, and priority [low to high] is associated with each communication type and stored.

  When the communication type of communication using the communication software is other than voice communication or video communication (S6: No), the control unit 33 adjusts the use band of data communication and transmits it with low priority (S5), and acquires communication data. (S1).

  On the other hand, when the communication type of communication using the communication software is voice communication or video communication (S6: Yes), whether or not there is a free band in which the voice communication or video communication can be performed from the communication band determination table 38b in the control unit 33. Is determined (S7).

  When there is a free band necessary for voice communication or video communication using the communication software (S7: Yes), the control unit 33 secures a use band for communication, and the voice communication or video according to the priority determination table 38a. Communication is performed with a higher priority for the transmission order of communication over other communication (S8), and while communication is not completed (S9: No), communication is continued with higher priority (S8), When the communication is finished (S9: Yes), the reserved use band is released and the process is finished.

  On the other hand, when there is no free bandwidth required for voice communication or video communication using communication software due to the influence of other high-priority communication, the control unit 33 notifies other wireless base stations that can be handed over notified from the wireless LAN terminal 2. It is confirmed with the system control device 4 whether or not there is a free bandwidth in 101 (S10).

  When the system controller 4 notifies that the other wireless base station 101 to which the wireless LAN terminal 2 can be handed over has a free band (S10: Yes), the control unit 33 notifies the wireless LAN terminal 2 of IEEE802.11. Information on the other wireless base station 101 is transmitted using the management packet, and the wireless LAN terminal 2 is requested to connect to the other wireless base station 101 (S11).

  On the other hand, when it is notified from the system control device 4 that there is no other wireless base station 101 to which the wireless LAN terminal 2 can be handed over (S10: No), the control unit 33 manages the IEEE 802.11 to the wireless LAN terminal 2. Information indicating that there is no other wireless base station 101 that can be handed over using a packet is transmitted, the wireless LAN terminal 2 is requested to connect to the mobile phone network 8 (S12), and the wireless LAN terminal 2 is connected. Disconnect.

Next, the operation of the wireless LAN terminal 2 will be described with reference to the flowchart of FIG.
When the wireless LAN terminal 2 searches for a nearby wireless base station 1, the communication data acquisition unit 45 acquires communication data (such as Beacon) received from the wireless base station 1 received by the wireless LAN communication unit 41 (S21), From the acquired communication data, the communication data analysis unit 46 calculates the communication quality [Received Signal Strength Indicator (RSSI) and signal-to-noise ratio (SNR)] of the surrounding radio base station 1; The calculated communication quality is stored in the communication quality storage unit 47a (S22).

  When communication using the communication software is started in the wireless LAN terminal 2 (S23), the control unit 44 uses the IEEE802.11 management packet to the wireless base station 1 to communicate the communication type (voice). (Communication, video communication, instant message, file transmission, etc.) and information on the bandwidth used for the communication to be carried out and information on the other wireless base stations 101 in the vicinity are transmitted to the wireless base station 1 (S24) and communication is carried out. It is determined whether or not (S25).

  When the communication is data communication other than voice communication or video communication (S25: No), the control unit 44 performs communication with low priority according to the priority determination table 38a stored in the storage unit 47 (S30).

  On the other hand, when the communication is voice communication or video communication (S25: Yes), the control unit 44 sends an IEEE802.11 management packet requesting a handover connection from the wireless base station 1 to another wireless base station 101. 2 is confirmed (S26), or whether an IEEE802.11 management packet requesting connection to the cellular phone network 8 is transmitted to the wireless LAN terminal 2 or not. (S27).

  When a handover connection request from the radio base station 1 to another radio base station 101 is notified (S26: Yes), the control unit 44 refers to the communication quality determination table 47b as shown in FIG. If there is another wireless base station 101 whose communication quality is equal to or higher than the threshold (S31: Yes), the wireless base station with the best communication quality among the notified other wireless base stations 101 A handover connection is made and communication is started (S34). Here, in FIG. 10, connection possibility / impossibility is associated with each communication quality threshold of the radio base station 1.

  On the other hand, when the communication qualities of the other radio base stations 101 that are handover candidates are all equal to or lower than the threshold (S31: No), it is determined that there is no other radio base station 101 that can be connected, and the control unit 44 determines the communication quality of communication. A screen like the one shown in Fig. 11 (for example, “*** Warning *** There is a possibility that communication quality may deteriorate due to use of the mobile phone network!”) After being displayed on the display unit 48 or informing the user by voice through the speaker of the receiver unit 50, the mobile phone network 8 is connected to start communication (S32). The wireless LAN terminal 2 searches for nearby wireless base stations 1 after the communication on the mobile phone network 8 is completed, and connects to wireless base stations with good communication quality (S33).

  When a connection to the mobile phone network 8 is requested (S27: Yes) without a handover connection request from the radio base station 1 to another radio base station 101 being notified (S26: No) 11, the control unit 44 displays a screen as shown in FIG. 11 on the display unit 48 or voices through the speaker of the receiver unit 50 that the communication quality of communication may be lowered. To the mobile phone network 8 and start communication using the communication software (S32), and after the communication using the communication software in the mobile phone network 8 is completed, the wireless base station 1 again (S33).

  When the handover connection request from the radio base station 1 to the other radio base station 101 is not notified (S26: No), and the connection to the mobile phone network 8 is not requested (S27: No), the control unit 44 stores The voice communication or the video communication is transmitted with a high priority according to the priority determination table 38a stored in the unit 47 (S28), and the priority is increased while the communication is not finished (S29: No). If the communication ends (S28: Yes), the communication ends.

  Thus, in this embodiment, when the wireless LAN terminal 2 performs voice communication or video communication using communication software, the wireless base station 1 uses information related to communication notified from the wireless LAN terminal 2. Thus, voice communication or moving image communication using the communication software of the wireless LAN terminal 2 can be preferentially transmitted over data communication of other wireless LAN terminals 2 to prevent deterioration in communication quality.

  Further, in the present embodiment, when communication quality of voice communication or video communication using communication software cannot be ensured in the radio base station 1, the connection is automatically switched to another radio base station 101 or a mobile phone network. be able to.

  Further, in the present embodiment, when the communication quality of voice communication or video communication using communication software cannot be ensured in all the wireless base stations 1, the effect of switching the connection to the mobile phone network is preliminarily determined. By outputting the warning sound / warning display, it is possible to inform the user that even if the communication quality deteriorates during voice communication or video communication using the communication software, it is not a problem caused by the wireless LAN system.

  The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  In the above embodiment, the IEEE management packet is used as a method of notifying information on the communication type and used bandwidth of the wireless LAN terminal 2, but by implementing the DPI (Deep Packet Inspection) function in the wireless base station 1. It is also possible to infer to some extent whether or not the communication is using communication software by analyzing the packet signature and traffic at the start of communication.

  In the above embodiment, the wireless base station 1 is based on the storage of communication data. However, by connecting a file server or the like to the network and transmitting the communication data to the file server, the amount of communication data The communication data can be saved even when the storage capacity of the wireless base station 1 is exceeded.

  Further, in the above embodiment, the system control device 4 and the wireless base station 1 are communicated with each other by wire. However, the communication is not limited to this as long as communication is possible, and wireless communication may be used.

  In the above embodiment, the wireless LAN terminal 2 is based on communication using, for example, Skype (registered trademark), but the signaling protocol [SIP (Session Initiation Protocol: IETE (Internet Engineering Task Force)). RFC 3261), H.C. 323 (defined by H.323 recommendation of ITU-T (International Telecommunication Union-Telecommunication Standard)), MGCP (specified by RFC 2705 of IETF), or any communication software having a telephone function However, the present invention is not limited to this, and voice communication or video communication by Google (registered trademark) Talk, fring, Fiber, Tango, or the like may be used.

  Furthermore, in the above-described embodiment, the means and functions of the radio base station 1 and the system control apparatus 4 are only required to be realized as the entire radio communication system 100. For example, the system control apparatus 4 and the radio base station 1 are all alone, A function may be provided.

1 (1a, 1b), 101 Wireless base station 2 (2a, 2b) Wireless LAN terminal (wireless terminal)
3a, 3b PC, etc. 4 System controller 5 Internet 6 Wired LAN terminal 7 Server group 8 Mobile phone network 11 Terminal communication data acquisition unit, 12 Terminal communication data control unit, 13 Switching notification unit 21 Base station communication data acquisition unit, 22 terminal communication information notification unit, 23 communication quality notification unit, 24 communication quality determination unit, 25 switching permission determination unit 30 antenna, 31 wireless communication unit, 32 wired communication unit, 33 control unit, 34 communication determination unit, 35 communication data acquisition Unit, 36 timer, 37 communication data analysis unit, 38 storage unit, 38a priority determination table, 38b communication band determination table 40 antenna, 41 communication unit, 42 antenna, 43 wireless modem, 44 control unit, 45 communication data acquisition unit, 46 communication data analysis unit, 47 storage unit, 47a communication quality storage unit, 47b communication quality determination table, 48 Radical 113, 49 reception section, 50 sending section, 50 receiving unit 100 wireless communication system

Claims (10)

A wireless base station used in a wireless LAN system that transmits and receives data by encrypting packets using communication software,
A terminal communication data acquisition means for acquiring a communication type based on data received from the wireless terminal when negotiating with the wireless terminal;
Based on the acquired communication type, it is determined whether the communication type desired to be transmitted / received to / from the communication partner side is voice communication or video communication using the communication software, and the sound using the communication software with the communication partner side is determined. Terminal communication data control means that prioritizes transmission or reception of communication or video communication over other communication;
A wireless base station comprising:   The radio base station according to claim 1, wherein the terminal communication data acquisition unit acquires the communication type based on a management packet of data received from the radio terminal. The terminal communication data acquisition means acquires a use band for each communication type based on data received from the wireless terminal,
A switching notification means for transmitting, to the wireless terminal, information related to another wireless base station that is a candidate for connection switching, when an available bandwidth of the wireless base station is less than a use bandwidth of voice communication or video communication using the communication software; The radio base station according to claim 1 or 2.   The radio base station according to claim 3, wherein the switching notification unit determines whether or not the free band is less than the used band based on a management packet of data received from the radio terminal. A plurality of radio base stations according to any one of claims 1 to 4,
A wireless terminal connected to the wireless base station;
Control means for controlling a plurality of the radio base stations;
A wireless LAN system comprising: The control means acquires a vacant band of a plurality of the radio base stations,
The terminal communication data acquisition means of the wireless base station acquires a use band for each communication type based on data received from the wireless terminal,
The switching notification means of the radio base station, when the available bandwidth of the radio base station is less than the used bandwidth of communication using communication software, other available bandwidth is larger than the used bandwidth that becomes a connection switching candidate from the control means. The wireless LAN system according to claim 5, wherein information regarding a wireless base station is acquired and information regarding the other wireless base station is transmitted to the wireless terminal. The wireless terminal, when acquiring information about the other wireless base station, communication quality determining means for determining whether or not the communication quality for each other wireless base station is equal to or higher than a threshold value;
Based on the determination result of the communication quality determination means, switching permission determination means for determining whether to permit connection switching to the other radio base station,
The wireless LAN system according to claim 6. The wireless terminal includes communication quality notification means,
8. The communication quality notifying unit notifies a user of the wireless terminal that there is a possibility that the communication quality is deteriorated in the case of a determination result that there is no wireless base station having a communication quality equal to or higher than the threshold. The wireless LAN system described in 1. A data transmission / reception method in a wireless LAN system for transmitting / receiving data by encrypting a packet using communication software,
Obtaining a communication type based on data received from the wireless terminal when negotiating with the wireless terminal;
Based on the acquired communication type, it is determined whether the communication type desired to be transmitted / received to / from the communication partner side is voice communication or video communication using the communication software, and the sound using the communication software with the communication partner side is determined. Prioritizing transmission or reception of communication or video communication over other communication;
A data transmission / reception method comprising: A program for executing a data transmission / reception method in a wireless LAN system for transmitting / receiving data by encrypting a packet using communication software,
On the computer,
Obtaining a communication type based on data received from the wireless terminal when negotiating with the wireless terminal;
Based on the acquired communication type, it is determined whether the communication type desired to be transmitted / received to / from the communication partner side is voice communication or video communication using the communication software, and the sound using the communication software with the communication partner side is determined. Prioritizing transmission or reception of communication or video communication over other communication;
A program that executes

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