JP2010154153A - Wireless lan terminal device and wireless lan network system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure VoIP voice call quality and improve battery life of a terminal by turning on/off power saving control in a VoIP voice call by autonomously determining the change of a wireless LAN communication environment by the terminal when the change of the wireless LAN communication environment is caused by variation of the number of simultaneous telephone calls. <P>SOLUTION: A power saving function ON/OFF decision part 117 receives a transmission error rate, a reception error rate and a reception RSSI of a current wireless LAN from respective monitor parts 113, 115, 116, and compares them with respective thresholds stored in a threshold information storage unit 118. Based on the comparison results, the power saving function ON/OFF decision part 117 transmits an in-call power saving control ON request signal to a wireless LAN communication control unit 119, and the wireless LAN communication control unit 119 receives it to make power saving control of a wireless LAN block effective. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless LAN terminal device and a wireless LAN network system having a function of performing a voice call with a wireless LAN base station via a wireless communication interface in a wireless LAN (Local Area Network) network. The present invention relates to a wireless LAN terminal device and a wireless LAN network system that can perform power saving control of a wireless communication interface by intermittently starting a wireless communication interface that performs wireless communication with a wireless LAN base station.

  In recent years, with the development of wireless communication technology and the miniaturization of component parts, various mobile communication terminals represented by mobile phones and PDAs (Personal Digital Assistants) have become widespread. More recently, mobile communication terminals are further provided with a wireless LAN communication interface typified by the IEEE 802.11 standard in addition to a call function using a mobile phone network, and VoIP (Voice over IP) via this wireless LAN communication interface. Products that enable voice calls through the market are emerging on the market. These portable communication terminals generally include a rechargeable battery and supply power from the battery.

  For this reason, the usable time of the mobile communication terminal depends on the battery life. However, in order to reduce the power consumption in consideration of the battery life of the terminal even during the VoIP voice call operation via the wireless LAN communication interface. , IEEE802.11 standard (Non-Patent Document 1) power saving control (PS mode) system, IEEE Std 802.11e-2005 (Non-Patent Document 2) U-APSD (Unscheduled Automatic Power) There is known a power saving control unit that intermittently activates a wireless LAN communication interface only when communication is performed using the (Save) method.

  On the other hand, in a VoIP voice call via a wireless LAN communication interface, if the number of simultaneous calls of wireless LAN terminals connected to the same wireless LAN base station apparatus increases, the probability of occurrence of wireless packet retransmission increases, so use as a result It is known that the available radio band is reduced and the voice call quality is deteriorated. Also, in this environment, if one of the wireless LAN terminals that are talking at the same time has a poor wireless LAN radio wave environment, the wireless communication rate of the wireless LAN terminal is lowered, so that the voice call quality further deteriorates. Will be.

For example, Patent Literature 1 is disclosed as a technique for solving this problem. The technology disclosed in Patent Document 1 is a wireless LAN network system that uses IP telephone terminals. When the number of connected terminals is small, a high-quality call is performed, and when the number of connected terminals is large, the call quality is suppressed. Therefore, it is possible to provide a communication control system and a communication control method that can secure a large number of call channels and can be applied to a general-purpose wireless LAN network system.
IEEE Std 802.11, 1999 edition IEEE Std 802.11e-2005 JP 2007-36828 A

  When the power saving control means described above is applied during a VoIP voice call, if the number of simultaneous calls of wireless LAN terminals connected to the same wireless LAN base station apparatus increases, the call quality further deteriorates due to the influence of redundant packets for power saving control. There is a problem that becomes apparent. However, in order to avoid this problem, if the power saving control is always turned OFF during VoIP voice call, another problem that the battery life of the terminal is shortened occurs.

  Furthermore, in the prior art disclosed in Patent Document 1, it is necessary to provide the wireless LAN base station apparatus with a call quality control function according to the number of connected terminals / used communication band, and the processing load of the wireless LAN base station apparatus increases. There is a problem that the cost of the wireless LAN base station apparatus is increased.

  The present invention has been made in view of the above problems, and even when a change occurs in the wireless LAN communication environment due to a change in the number of simultaneous calls, the terminal autonomously determines this, and at the time of VoIP voice call An object of the present invention is to provide a wireless LAN terminal device and a wireless LAN network system that can ensure the quality of VoIP voice communication and improve the battery life of a terminal by performing ON / OFF of power saving control.

  The present invention is a wireless LAN terminal device capable of performing a voice call by connecting to a wireless LAN communication network, and a wireless LAN communication means for transmitting and receiving by connecting to a wireless LAN communication network, Based on the determination result of the power-saving function ON / OFF determining means for determining ON / OFF of the power-saving function for intermittently starting and stopping the wireless LAN communication means, and the determination result of the power-saving function ON / OFF determining means Wireless LAN communication control means for performing power saving control of the LAN communication means.

Further, the present invention provides the wireless LAN terminal device, wherein the wireless LAN electric field intensity detecting means detects the electric field intensity of the radio signal received by the wireless LAN communication means from the wireless LAN communication network, and the power saving function ON / Threshold information storage means for storing information on the threshold value of the radio signal electric field strength, which is a determination criterion of the OFF determination means,
The power saving function ON / OFF determination means turns on the power saving function when the radio signal electric field intensity detected by the radio signal electric field intensity detection means is equal to or greater than a threshold stored in the threshold information storage means, and the radio signal When the radio signal electric field intensity detected by the electric field intensity detecting means is less than the threshold value stored in the threshold information storing means, the power saving function is turned off.

Further, the present invention provides the wireless LAN terminal device comprising: a transmission error monitoring unit that monitors a transmission error rate transmitted by the wireless LAN communication unit from a wireless LAN communication network; and the power saving function ON / OFF determination unit. Threshold information storage means for storing threshold information on the number of retransmissions serving as a determination criterion,
When the transmission error rate detected by the transmission error monitoring unit is smaller than the threshold stored in the threshold information storage unit, the power saving function ON / OFF determination unit turns on the power saving function, and the transmission error monitoring unit When the detected transmission error rate is greater than or equal to the threshold value stored in the threshold value information storage means, the power saving function is turned off.

Further, the present invention provides the wireless LAN terminal device, wherein the reception error frequency monitoring means for monitoring a reception error rate of a wireless voice frame received by the wireless LAN communication means from a wireless LAN communication network, and the power saving function ON Threshold information storage means for storing information on the threshold value of the number of retransmissions serving as a determination criterion of the / OFF determination means,
The power saving function ON / OFF determination means turns on the power saving function when the reception error rate detected by the reception error frequency monitoring means is smaller than the threshold value stored in the threshold information storage means, and monitors the reception error frequency When the reception error rate detected by the means is equal to or greater than the threshold stored in the threshold information storage means, the power saving function is turned off.

In addition, the present invention provides the wireless LAN terminal apparatus, wherein the communication load information is used to monitor communication load information indicating a communication load amount of a wireless LAN included in a wireless signal received by the wireless LAN communication unit from a wireless LAN communication network. Monitoring means, and threshold information storage means for storing information on the threshold value of the communication load serving as a determination criterion of the power saving function ON / OFF determination means,
The power saving function ON / OFF determination means turns on the power saving function when the communication load amount detected by the communication load information monitoring means is smaller than the threshold value stored in the threshold information storage means, and monitors the communication load information. When the communication load detected by the means is equal to or greater than the threshold stored in the threshold information storage means, the power saving function is turned off.

  Here, the communication load information is obtained by detecting a wireless communication load amount by a plurality of wireless LAN terminal devices connected to the wireless LAN communication network by a wireless LAN base station connected to the wireless LAN communication network, It is the information added to. The wireless LAN terminal device is a mobile phone.

The present invention is also a wireless LAN network system comprising a wireless LAN terminal device capable of performing a voice call by connecting to a wireless LAN communication network, and a wireless LAN base station connected to the wireless LAN communication network. The wireless LAN base station detects a wireless communication load amount by the wireless LAN terminal device connected to a wireless LAN communication network, and adds communication load information as communication load information to a wireless notification signal; Transmitting means for transmitting a wireless notification signal to the wireless LAN terminal device,
The wireless LAN terminal device determines ON / OFF of a wireless LAN communication unit that transmits and receives data by connecting to a wireless LAN communication network and a power saving function that intermittently starts and stops the wireless LAN communication unit during a voice call. A power saving function ON / OFF determination means, a wireless LAN communication control means for performing power saving control of the wireless LAN communication means based on a determination result of the power saving function ON / OFF determination means, and a wireless LAN communication network A communication load information monitoring unit that monitors communication load information indicating a communication load amount of a wireless LAN included in a wireless signal received by the wireless LAN communication unit, and a communication load that is a determination criterion of the power saving function ON / OFF determination unit Threshold information storage means for storing amount threshold information,
The power saving function ON / OFF determination means turns on the power saving function when the communication load detected by the communication load information monitoring means is smaller than the threshold stored in the threshold information storage means,
When the communication load amount detected by the communication load information monitoring unit is equal to or greater than the threshold value stored in the threshold information storage unit, the power saving function is turned off.

  According to the present invention, even when the wireless LAN communication environment changes due to fluctuations in the number of simultaneous calls of wireless LAN terminals connected to the same wireless LAN base station apparatus, the voice call quality can be ensured and the number of simultaneous calls is small. Thus, by turning on the power saving control during the VoIP voice call, the performance of the battery life of the terminal can be improved.

  Embodiments of the present invention will be specifically described below with reference to the drawings. In the figure, blocks having the same function are denoted by the same reference numerals, and repeated description thereof is omitted.

(First embodiment)
FIG. 1A is a schematic diagram of a shape of a wireless LAN terminal device according to a first embodiment of the present invention, FIG. 1B is a schematic diagram of a back surface shape of the wireless LAN terminal device, and FIG. It is a schematic block diagram of the voice call system using the wireless LAN voice call function with which a wireless LAN terminal device is equipped.

  10 is a wireless LAN terminal device, 110 is an antenna for wireless LAN communication, 100 is an antenna for mobile phone line communication, 20 is a wireless LAN access point (wireless LAN base station) for performing wireless LAN communication with the wireless LAN terminal device 10, and 30 is A telephone line network 40 is a call control device for connecting and exchanging voice calls between wireless LAN terminal apparatuses 10 or between a wireless LAN terminal apparatus 10 and a telephone apparatus (not shown) connected to the telephone line network 40. is there. Thus, the wireless LAN terminal device 10 has a wireless LAN voice call function in addition to voice communication means on a mobile phone line.

  FIG. 2 is a block diagram for explaining the operating principle of power saving control during a call in the wireless LAN communication unit of the wireless LAN terminal device 10a according to the first embodiment of the present invention shown in FIG. In the figure, a wireless LAN terminal device 10a includes a terminal overall control unit 130 that manages and controls all blocks of the terminal, a wireless LAN communication control unit 119 that performs integrated control of wireless LAN communication blocks, and a wireless LAN communication antenna 110. The directional coupling unit 111 that separates the wireless signal received from the wireless LAN access point 20 from the wireless transmission signal transmitted to the wireless LAN access point 20, and the transmission signal from the wireless LAN terminal device 10 a to the wireless LAN access point 20 The wireless LAN transmission unit 112 that modulates the wireless LAN, the wireless LAN reception unit 114 that demodulates the wireless reception signal from the wireless LAN access point 20, and the transmission error rate based on the number of wireless LAN frame transmission errors obtained from the wireless LAN transmission unit 112 Wireless LAN transmission error monitor unit for calculating and monitoring (transmission error) Monitoring means) 113, wireless LAN reception error monitoring section (reception error monitoring means) 115 for calculating and monitoring the reception error rate based on the number of wireless LAN frame reception errors obtained from the wireless LAN receiving section 114, wireless LAN receiving section 114 A wireless LAN RSSI monitor unit (wireless signal field strength detection means) 116 for monitoring a wireless reception RSSI (Received Signal Strength Indicator) from the wireless LAN access point 20 obtained from the wireless LAN access point 20, ON / OFF of wireless LAN power saving control during a wireless LAN call Wireless LAN transmission error rate, wireless LAN reception error rate, wireless LAN RSSI value, threshold information storage unit 118 for storing and holding threshold values, wireless LAN transmission error monitoring unit 113, and wireless LAN reception error Each block of the monitor unit 115 and the wireless LAN RSSI monitor unit 116 Wireless LAN transmission error rate, wireless LAN reception error rate, and wireless LAN RSSI value information obtained from the network, and threshold information on wireless LAN power saving control ON / OFF switching during wireless LAN call obtained from the threshold information storage unit 118 ON / OFF of the wireless LAN power saving control during the wireless LAN communication with respect to the wireless LAN communication control unit 119 based on the state information during the wireless LAN call or non-calling obtained from the terminal overall control unit 130 The power saving function ON / OFF determination unit 117 is configured to notify each of the blocks.

  FIG. 3 shows an example of threshold information stored in the threshold information storage unit 118. In FIG. 3, X indicates a threshold value of a wireless LAN transmission error rate (%) for switching ON / OFF of power saving control during a wireless LAN call. When the current wireless LAN transmission error rate is smaller than X (%) The power saving control during wireless LAN call is set to ON, and the power saving control during wireless LAN call is set to OFF when the wireless LAN communication environment is bad when X (%) or more. Y represents a threshold value of a wireless LAN reception error rate (%) for switching ON / OFF of power saving control during a wireless LAN call. When the current wireless LAN reception error rate is smaller than Y (%), the wireless LAN The power saving control during a call is turned on, and if it is Y (%) or more, the wireless LAN communication environment is bad, and the power saving control during a wireless LAN call is turned off. Further, Z indicates a threshold value of wireless LAN reception RSSI (dBm) for switching ON / OFF of power saving control during a wireless LAN call, and the current wireless LAN reception RSSI value (reception signal strength value) is equal to or greater than Z (dBm). In this case, the power saving control during the wireless LAN call is set to ON, and when it falls below Z (dBm), the power saving control during the wireless LAN call is set to OFF because the wireless LAN communication environment is bad.

  Thus, in the threshold information storage unit 118, the wireless LAN transmission error rate, the wireless LAN reception error rate, the wireless LAN reception RSSI thresholds, which are wireless communication environment degradation parameters, and the power saving during wireless LAN call corresponding thereto It is possible to hold control ON / OFF determination information.

FIG. 4 is a flowchart for explaining a processing example of the above-described power saving ON / OFF switching control during a wireless LAN call.
In the wireless LAN terminal device 10a, this process is started when the wireless LAN call starts. First, the power saving function ON / OFF determination unit 117 reads the current wireless LAN transmission error rate information from the wireless LAN transmission error monitor unit 113 and then stores the wireless LAN transmission error rate stored in the threshold information storage unit 118. Compared with the threshold value X, if the current wireless LAN transmission error rate is lower than X, the process proceeds to step S002, and if not, the process proceeds to step S005 (step: S001).

  Next, the power saving function ON / OFF determination unit 117 reads the current wireless LAN reception error rate information from the wireless LAN reception error monitoring unit 115 and then stores the wireless LAN reception error stored in the threshold information storage unit 118. Compared with the rate threshold Y, if the current wireless LAN reception error rate is lower than Y, the process proceeds to step S003; otherwise, the process proceeds to step S005 (step: S002).

  Further, the power saving function ON / OFF determination unit 117 reads the current wireless LAN reception RSSI information from the wireless LAN RSSI monitor unit 116 and then stores the wireless LAN reception RSSI threshold Z stored in the threshold information storage unit 118. If the current wireless LAN reception RSSI is equal to or greater than Z, the process proceeds to step S004; otherwise, the process proceeds to step S005 (step: S003). When the determination in step S003 is Y, the power saving function ON / OFF determination unit 117 transmits a power saving control ON request signal during a call to the wireless LAN communication control unit 119, and the wireless LAN communication control unit 119 In response, the power saving control of the wireless LAN block is validated (step: S004).

  On the other hand, if the determination is N in steps S001, S002, and S003, the power saving function ON / OFF determination unit 117 transmits a power saving control OFF request signal during a call to the wireless LAN communication control unit 119, and the wireless LAN In response to this, the communication control unit 119 invalidates the power saving control of the wireless LAN block (step: S005). Thereafter, the power saving function ON / OFF determination unit 117 waits for a predetermined time (step: S006), determines whether the wireless LAN call is currently in progress or not in accordance with the status information from the terminal overall control unit 130, and If it is in the middle, the process returns to step S001, and if it is not in a call, the process is terminated (step: S007).

(Second Embodiment)
FIG. 5 is a block diagram for explaining the operating principle of power saving control during a call in the wireless LAN communication unit of the wireless LAN terminal device 10b according to the second embodiment of the present invention. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 5, the wireless LAN terminal device 10 b receives the IEEE802.11 standard (Non-patent Document 1) defined wireless notification signal (beacon signal) or probe response signal from the wireless LAN access point 20 obtained from the wireless LAN receiver 114. A wireless communication load information monitor unit 121 for monitoring wireless communication load information included in the threshold value, and a threshold information storage unit for storing and holding a wireless communication load threshold value for performing ON / OFF switching of wireless LAN power saving control during a wireless LAN call 128, wireless communication load information obtained from the wireless communication load information monitoring unit (communication load information monitoring unit) 121, threshold information during a wireless LAN call obtained from the threshold information storage unit 128, and obtained from the terminal overall control unit 130. Based on the state information during the wireless LAN call or during the non-call, the wireless LAN communication control unit 119 To, and includes the respective blocks of the power saving function ON / OFF determination unit 127 for instruction notification ON or OFF of the wireless LAN power saving control in a wireless LAN calls.

  Although not shown, the wireless LAN access point 20 includes a communication load information adding unit that adds wireless communication load information to a wireless notification signal (beacon signal) or a probe response signal, and a wireless that transmits the communication load information to a wireless communication network. A LAN transmission unit is provided.

  FIG. 6 shows an example of threshold information stored in the threshold information storage unit 128. In FIG. 6A, W indicates a threshold value of wireless communication load information for switching ON / OFF of power saving control during a wireless LAN call. In the present embodiment, as the wireless communication load information, as shown in FIG. 6 (B), the wireless communication load information from the wireless LAN access point 20 defined in IEEE Std 802.11e-2005 (Non-patent Document 2) is used. It is assumed that the channel utilization (radio channel usage rate) field value in the information element QBSS load element included in the radio broadcast signal (beacon) or probe response signal is used, and the current radio channel usage rate is smaller than W The power saving control during the wireless LAN call is set to ON, and if it is W or more, the wireless LAN communication environment is bad and the power saving control during the wireless LAN call is set to OFF.

  As described above, the threshold information storage unit 128 can hold in advance the wireless channel usage rate threshold value, which is a wireless communication environment degradation parameter, and ON / OFF determination information for power saving control during wireless LAN communication corresponding to the wireless channel usage rate threshold value. is there.

  FIG. 7 is a flowchart for explaining a processing example of power saving ON / OFF switching control during a wireless LAN call of the wireless LAN terminal device 10b according to the second embodiment of the present invention described above. In the wireless LAN terminal device 10b, this process is started when the wireless LAN call starts. The power saving function ON / OFF determination unit 127 reads the current wireless channel usage rate information from the wireless communication load information monitoring unit 121 and compares it with the wireless channel usage rate threshold value W stored in the threshold information storage unit 128. If the current wireless channel usage rate is lower than W, the process proceeds to step S102; otherwise, the process proceeds to step S103 (step: S101). If the determination in step S101 is Y, the power saving function ON / OFF determination unit 127 transmits a power saving control ON request signal during a call to the wireless LAN communication control unit 119, and the wireless LAN communication control unit 119 In response, the power saving control of the wireless LAN block is validated (step: S102).

  On the other hand, if the determination in step S101 is N, the power saving function ON / OFF determination unit 127 transmits a power saving control OFF request signal during a call to the wireless LAN communication control unit 119, and the wireless LAN communication control unit 119. In response to this, the power-saving control of the wireless LAN block is invalidated (step: S103). Thereafter, the power saving function ON / OFF determination unit 127 waits for a certain time (step: S104), determines whether the wireless LAN call is currently in progress or not in accordance with the status information from the overall terminal control unit 130, and If it is in the middle, the process returns to step S101, and if it is not in a call, the process is terminated (step: S105).

  As described above, in the wireless LAN terminal device according to the present embodiment, when the wireless LAN communication environment deterioration represented by the increase in the number of simultaneous wireless LAN terminal device calls occurs, the power saving control during the wireless LAN call is turned off. If the voice call quality is ensured by the wireless LAN terminal, the power consumption control of the wireless LAN terminal device can be reduced by turning on the power saving control during the wireless LAN call. Note that the various control methods and configurations presented in this embodiment are merely examples, and it goes without saying that the present invention can be used in various wireless LAN communication systems to which the present invention is applicable.

1 is a schematic diagram of a wireless LAN terminal device and system according to the present invention. It is a block block diagram of the wireless LAN terminal device which is 1st Embodiment of this invention. It is an example of the power saving ON / OFF switching threshold value storage information during the wireless LAN call of the wireless LAN terminal device according to the first embodiment of the present invention. 3 is a flowchart for explaining a processing example of power saving ON / OFF switching control during a wireless LAN call in the wireless LAN terminal device shown in FIG. 2. It is a block block diagram of the wireless LAN terminal device which is 2nd Embodiment of this invention. It is an example of the power-saving ON / OFF switching threshold value storage information during the wireless LAN call of the wireless LAN terminal device according to the second embodiment of the present invention. 6 is a flowchart for explaining a processing example of power saving ON / OFF switching control during a wireless LAN call in the wireless LAN terminal device shown in FIG. 5.

Explanation of symbols

10, 10a, 10b Terminal device 20 Wireless LAN access point 40 Telephone network 110 Communication antenna 111 Directional coupling unit 112 Wireless LAN transmission unit 113 Wireless LAN transmission error monitoring unit 114 Wireless LAN reception unit 115 Wireless LAN reception error monitoring unit 116 Wireless LAN RSSI monitor unit 117 Power saving function ON / OFF determination unit 118 Threshold information storage unit 119 Wireless LAN communication control unit 121 Wireless communication load information monitor unit 127 Power saving function ON / OFF determination unit 128 Threshold information storage unit 130 Overall terminal control Part

Claims (8)

A wireless LAN terminal device capable of performing a voice call by connecting to a wireless LAN communication network,
Wireless LAN communication means for transmitting and receiving by connecting to a wireless LAN communication network;
A power saving function ON / OFF judging means for judging ON / OFF of a power saving function for intermittently starting and stopping the wireless LAN communication means during a voice call;
Wireless LAN communication control means for performing power saving control of the wireless LAN communication means based on the determination result of the power saving function ON / OFF determination means;
A wireless LAN terminal device comprising: The wireless LAN terminal device according to claim 1,
Wireless signal field strength detecting means for detecting a field strength of a wireless signal received by the wireless LAN communication means from a wireless LAN communication network;
Threshold information storage means for storing information on a threshold value of a radio signal electric field strength that is a determination criterion of the power saving function ON / OFF determination means;
Comprising
The power saving function ON / OFF determination means includes:
If the wireless signal field strength detected by the wireless signal field strength detection means is equal to or greater than the threshold stored in the threshold information storage means, the power saving function is turned ON,
A wireless LAN terminal device, wherein the power saving function is turned off when the wireless signal field strength detected by the wireless signal field strength detection means is less than a threshold stored in the threshold information storage means. The wireless LAN terminal device according to claim 1,
A transmission error monitoring means for monitoring a transmission error rate transmitted from the wireless LAN communication network by the wireless LAN communication means;
Threshold information storage means for storing threshold information on the number of retransmissions, which is a criterion for the power saving function ON / OFF determination means;
Comprising
The power saving function ON / OFF determination means includes:
When the transmission error rate detected by the transmission error monitoring unit is smaller than the threshold value stored in the threshold information storage unit, the power saving function is turned ON,
A wireless LAN terminal device, wherein a power saving function is turned off when a transmission error rate detected by the transmission error monitoring unit is equal to or greater than a threshold stored in the threshold information storage unit. The wireless LAN terminal device according to claim 1,
A reception error frequency monitoring means for monitoring a reception error rate of a wireless voice frame received by the wireless LAN communication means from a wireless LAN communication network;
Threshold information storage means for storing threshold information on the number of retransmissions, which is a criterion for the power saving function ON / OFF determination means;
Comprising
The power saving function ON / OFF determination means includes:
When the reception error rate detected by the reception error frequency monitoring means is smaller than the threshold value stored in the threshold information storage means, the power saving function is turned ON,
A wireless LAN terminal device, wherein the power saving function is turned off when the reception error rate detected by the reception error frequency monitoring means is equal to or greater than a threshold stored in the threshold information storage means. The wireless LAN terminal device according to claim 1,
Communication load information monitoring means for monitoring communication load information indicating a communication load amount of a wireless LAN included in a wireless signal received by the wireless LAN communication means from a wireless LAN communication network;
Threshold information storage means for storing information on a threshold value of communication load serving as a determination criterion of the power saving function ON / OFF determination means;
Comprising
The power saving function ON / OFF determination means includes:
When the communication load amount detected by the communication load information monitoring unit is smaller than the threshold value stored in the threshold information storage unit, the power saving function is turned ON,
A wireless LAN terminal device, wherein a power saving function is turned off when a communication load detected by the communication load information monitoring unit is equal to or greater than a threshold stored in the threshold information storage unit. The wireless LAN terminal device according to claim 5,
In the communication load information, a wireless LAN base station connected to a wireless LAN communication network detects a wireless communication load amount by a plurality of wireless LAN terminal devices connected to the wireless LAN communication network, and adds it to a wireless notification signal. A wireless LAN terminal device characterized by being information. The wireless LAN terminal device according to any one of claims 1 to 6,
The wireless LAN terminal device is a mobile phone. A wireless LAN network system comprising a wireless LAN terminal device capable of performing a voice call by connecting to a wireless LAN communication network, and a wireless LAN base station connected to the wireless LAN communication network,
The wireless LAN base station is
Communication load information adding means for detecting a wireless communication load amount by the wireless LAN terminal device connected to the wireless LAN communication network and adding it to the wireless notification signal as communication load information;
Transmitting means for transmitting the wireless notification signal to the wireless LAN terminal device;
Comprising
The wireless LAN terminal device
Wireless LAN communication means for transmitting and receiving by connecting to a wireless LAN communication network;
A power saving function ON / OFF judging means for judging ON / OFF of a power saving function for intermittently starting and stopping the wireless LAN communication means during a voice call;
Wireless LAN communication control means for performing power saving control of the wireless LAN communication means based on the determination result of the power saving function ON / OFF determination means;
Communication load information monitoring means for monitoring communication load information indicating a communication load amount of a wireless LAN included in a wireless signal received by the wireless LAN communication means from a wireless LAN communication network;
Threshold information storage means for storing information on a threshold value of communication load serving as a determination criterion of the power saving function ON / OFF determination means;
Comprising
The power saving function ON / OFF determination means includes:
When the communication load amount detected by the communication load information monitoring unit is smaller than the threshold value stored in the threshold information storage unit, the power saving function is turned ON,
A wireless LAN network system, wherein a power saving function is turned off when a communication load detected by the communication load information monitoring unit is equal to or greater than a threshold stored in the threshold information storage unit.

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