JP4694356B2 - Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN - Google Patents
Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN Download PDFInfo
- Publication number
- JP4694356B2 JP4694356B2 JP2005337305A JP2005337305A JP4694356B2 JP 4694356 B2 JP4694356 B2 JP 4694356B2 JP 2005337305 A JP2005337305 A JP 2005337305A JP 2005337305 A JP2005337305 A JP 2005337305A JP 4694356 B2 JP4694356 B2 JP 4694356B2
- Authority
- JP
- Japan
- Prior art keywords
- wireless
- wireless lan
- radio wave
- public
- threshold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Small-Scale Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Description
本発明は、携帯電話やPHSなどの公衆無線回線による無線電話機能と無線LANによるIP電話機能とを併せ持つ無線端およびこの無線端末における公衆無線回線と無線LANとを切替えるローミング方法に係わり、特に切替えによる接続料金の課金を軽減するために不要なローミングを制限する方法に関する。 The present invention relates to a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN, and a roaming method for switching between a public wireless line and a wireless LAN in this wireless terminal, The present invention relates to a method for restricting unnecessary roaming in order to reduce the charge of connection charges due to Internet.
近年、構内では通話料が無料である無線LANを用いたIP電話で通話し、構外では有料だが任意の場所で使用可能な携帯電話やPHSなどの公衆無線回線で通話する無線端末が製品化されている。この無線端末は、無線LANによるIP電話で通話中に移動して無線LAN電波の到達範囲外になった場合は公衆無線回線に自動的に切替わり、逆に公衆無線回線で通話中に移動して無線LAN電波の到達範囲内になった場合は無線LANに自動的に切替わる。 In recent years, wireless terminals have been commercialized that use IP phones using wireless LAN, which is free of charge on the premises, and are charged outside the premises but can be used anywhere, such as mobile phones and PHS public telephone lines. ing. This wireless terminal automatically switches to a public wireless line when it moves outside a wireless LAN radio wave reachable range during a call on a wireless LAN IP phone, and conversely moves during a call on a public wireless line. When the wireless LAN radio wave is within reach, it automatically switches to the wireless LAN.
無線LAN電波が完全に受信できなくなった後に無線LANから公衆無線回線に切替えると、その間に通信が出来ない時間が生じるので音切れが発生する。そこで実際には、無線LAN電波の受信電力が閾値以下になった場合に、公衆無線回線への接続を開始し、公衆無線回線への接続を確認してから無線LANを切断している。 When switching from a wireless LAN to a public wireless line after wireless LAN radio waves cannot be completely received, a time during which communication cannot be performed occurs, and sound breaks out. Therefore, in actuality, when the reception power of the wireless LAN radio wave becomes equal to or lower than the threshold value, the connection to the public wireless line is started, and the wireless LAN is disconnected after confirming the connection to the public wireless line.
上記において、無線端末を使用中のユ−ザが実際に無線LAN電波が到達しない場所へ移動している場合には、公衆無線回線への切替わり時刻が多少前後しても問題は無い。しかし、ユ−ザがたまたま無線LAN電波の受信電力が小さい場所にいるが、無線LAN電波が到達しない場所へは移動しない場合にも公衆無線回線へ接続され、通信料金が課金される。さらに、該ユ−ザが無線LAN電波の受信電力が小さい地域と大きい地域を往復すると、無線LANと公衆無線回線が繰り返し切替えられ、その切替えごとに公衆無線回線の通信料金が課金される。さらに切替えに伴い、音声の瞬断が発生する場合もある。 In the above, when the user who is using the wireless terminal is moving to a place where the wireless LAN radio wave does not actually reach, there is no problem even if the switching time to the public wireless line is slightly changed. However, even if the user happens to be in a place where the received power of the wireless LAN radio wave is small, but does not move to a place where the wireless LAN radio wave does not reach, the user is connected to the public wireless line and is charged a communication fee. Further, when the user makes a round trip between the area where the reception power of the wireless LAN radio wave is low and the area where the reception power is high, the wireless LAN and the public wireless line are repeatedly switched, and the communication fee for the public wireless line is charged for each switching. Furthermore, a voice interruption may occur with the switching.
上記問題を解決するために、本発明は、携帯電話やPHSなどの公衆無線回線による無線電話機能と無線LANによるIP電話機能とを併せ持つ無線端末において、発呼操作を検知した場合、無線LAN電波の受信電力を測定して第一の閾値と比較し、無線LAN電波の受信電力が第一の閾値より高ければ無線LANを用いて発呼し、無線LAN電波の受信電力が第一の閾値より低ければ公衆無線回線で発呼し、無線LANによる通信中に、無線LAN電波の受信電力を測定して第二の閾値と比較し、無線LAN電波の受信電力が第二の閾値未満の場合は、公衆無線回線への切替え要求を表示し、切替えの承認操作を検知した場合は、公衆無線回線による通信に切替え、公衆無線回線による通信中に、無線LAN電波の受信電力を測定して第三の閾値と比較し、無線LAN電波の受信電力が第三の閾値以上の場合は、無線LANへの切替え要求を表示し、切替えの承認操作を検知した場合は無線LANによる通信に切替え、前記第二の閾値は前記第一の閾値より低く、前記第三の閾値は前記第一の閾値より高いことを特徴とする。 In order to solve the above problem, the present invention is directed to a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN. The received power is measured and compared with the first threshold. If the received power of the wireless LAN radio wave is higher than the first threshold, a call is made using the wireless LAN, and the received power of the wireless LAN radio wave is lower than the first threshold. If it is low, a call is made on the public wireless line, and during wireless LAN communication, the received power of the wireless LAN radio wave is measured and compared with the second threshold. If the received power of the wireless LAN radio wave is less than the second threshold, When a request for switching to a public wireless line is displayed and a switching approval operation is detected, the communication is switched to the public wireless line, and the received power of the wireless LAN radio wave is measured during communication via the public wireless line. If the received power of the wireless LAN radio wave is greater than or equal to the third threshold value, a request for switching to the wireless LAN is displayed. If an approval operation for switching is detected, the wireless LAN communication is switched to communication. The second threshold is lower than the first threshold, and the third threshold is higher than the first threshold .
本発明によれば、無線LAN電波の受信電力が低減した時に、公衆無線回線と無線LAN間の不要な切替わりを防止できるので、公衆無線回線への切替えに伴う使用料金の不要な課金を防ぐことができる。 According to the present invention, when the reception power of the wireless LAN radio wave is reduced, unnecessary switching between the public wireless line and the wireless LAN can be prevented, thereby preventing unnecessary charging of the usage fee associated with switching to the public wireless line. be able to.
本発明は、携帯電話やPHSなどの公衆無線回線による無線電話機能と、無線LANによるIP電話機能とを併せ持つ無線端末において、無線LAN電波の受信電力を測定する手段と、測定した無線LAN電波の受信電力を予め定めた閾値と比較する手段と、前記比較結果に基づいて無線LANによるIP電話機能と無線LANによるIP電話機能との切替えを問い合わせる手段と、外部からの補助信号の有無を検出し切替えの承認の有無を検出する手段と、前記比較結果と前記切替え認証有無に従い公衆無線回線による無線電話機能と無線LANによるIP電話機能との間で接続を切替える手段とを有する。 The present invention relates to a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN, a means for measuring the received power of the wireless LAN radio wave, A means for comparing received power with a predetermined threshold; a means for inquiring switching between an IP telephone function by a wireless LAN and an IP telephone function by a wireless LAN based on the comparison result; and the presence or absence of an auxiliary signal from the outside. Means for detecting whether or not switching is approved, and means for switching connection between a wireless telephone function using a public wireless line and an IP telephone function using a wireless LAN in accordance with the comparison result and the presence / absence of switching authentication.
また、本発明は、上記無線端末において、前記比較結果に基づいて無線LANによるIP電話機能と無線LANによるIP電話機能との切替えを問い合わせる手段が表示部に切替えの可否を表示して問い合わせる手段であり、前記外部からの補助信号の有無を検出し切替えの承認の有無を検出する手段がユーザが特定のキーを押し下げたことを検出する手段とした。さらに。本発明は、上記無線端末において、前記比較結果に基づいて無線LANによるIP電話機能と無線LANによるIP電話機能との切替えを問い合わせる手段が自己の位置を問い合わせる手段であり、前記外部からの補助信号の有無を検出し切替えの承認の有無を検出する手段が無線LANが設置された領域の出入り口であることを検出する手段とした。 According to the present invention, in the above wireless terminal, the means for inquiring about switching between the IP telephone function using the wireless LAN and the IP telephone function using the wireless LAN based on the comparison result displays on the display unit whether the switching is possible or not. The means for detecting the presence / absence of an auxiliary signal from the outside and detecting the presence / absence of switching approval is a means for detecting that the user has depressed a specific key. further. According to the present invention, in the wireless terminal, the means for inquiring about switching between the IP telephone function by the wireless LAN and the IP telephone function by the wireless LAN based on the comparison result makes an inquiry about the position of the wireless terminal, and the auxiliary signal from the outside The means for detecting the presence / absence of the switch and detecting the approval / non-approval of the switching is a means for detecting that the entrance / exit of the area where the wireless LAN is installed.
本発明は、上記無線端末において、前記比較結果に基づいて無線LANによるIP電話機能と無線LANによるIP電話機能との切替えを問い合わせる手段が自己の位置を問い合わせる手段であり、前記外部からの補助信号の有無を検出し切替えの承認の有無を検出する手段が無線LANが設置された領域の出入り口であることを検出する手段とした。 According to the present invention, in the wireless terminal, the means for inquiring about switching between the IP telephone function by the wireless LAN and the IP telephone function by the wireless LAN based on the comparison result makes an inquiry about the position of the wireless terminal, and the auxiliary signal from the outside The means for detecting the presence / absence of the switch and detecting the approval / non-approval of the switching is a means for detecting that the entrance / exit of the area where the wireless LAN is installed.
本発明は、携帯電話やPHSなどの公衆無線回線による無線電話機能と、無線LANによるIP電話機能とを併せ持つ無線端末における公衆無線回線と無線LANとを切替えるローミング方法において、前記無線端末が、無線LAN電波の受信電力を測定し、測定した無線LAN電波の受信電力を予め定めた閾値と比較し、前記比較結果に基づいて無線LANによるIP電話機能と無線LANによるIP電話機能との切替えをユーザに問い合わせ、ユーザの切替えの承認の有無を検出すると、前記比較結果と前記切替え認証有無に従い公衆無線回線による無線電話機能と無線LANによるIP電話機能との間で接続を切替えるようにした。 The present invention relates to a roaming method for switching between a public wireless line and a wireless LAN in a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN. Measures the received power of the LAN radio wave, compares the measured received power of the wireless LAN radio wave with a predetermined threshold, and switches between the IP telephone function by the wireless LAN and the IP telephone function by the wireless LAN based on the comparison result. When the presence / absence of user switching approval is detected, the connection is switched between the wireless telephone function using the public wireless line and the IP telephone function using the wireless LAN according to the comparison result and the switching authentication presence / absence.
以下、本発明の実施の形態について図面を参照して詳細に説明する。無線端末が公衆無線回線と無線LANを切替えて通信する場合の構成を図1に示す。無線LAN電波到達範囲6−1内にある無線端末1−1、 1−2は、AP2−1またはAP2−2に接続される。APはイ−サなどの有線ケ−ブルによりル−タ3−1に接続されている。ル−タ3−1は有線ケ−ブルで有線端末4−1やインタ−ネットなどの公衆有線網5経由で遠隔地のル−タ3−2に接続される。ル−タ3−2は、さらに有線ケ−ブルでAP2−3や有線端末4−2に接続される。AP2−3から無線LAN電波到達範囲6−2内にある無線端末1−4に接続される。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a configuration when a wireless terminal performs communication by switching between a public wireless line and a wireless LAN. The wireless terminals 1-1 and 1-2 in the wireless LAN radio wave reachable range 6-1 are connected to the AP 2-1 or the AP 2-2. The AP is connected to the router 3-1 by a wired cable such as an ether. The router 3-1 is a wired cable and is connected to a remote router 3-2 via a public
無線端末1−3は無線LAN電波到達範囲6−1の外に出たので公衆無線回線基地局7−1に接続され、無線端末1−5は無線LAN電波到達範囲6−2の外に出たので公衆無線回線基地局7−2に接続される。公衆無線回線基地局7−1、7−2は、公衆無線網8で接続される。公衆無線網8は、さらに公衆有線網とも接続され、全ての無線端末が互いに接続可能となる。
Since the wireless terminal 1-3 has gone out of the wireless LAN radio wave reachable range 6-1, it is connected to the public radio network base station 7-1, and the wireless terminal 1-5 goes out of the wireless LAN radiowave reachable range 6-2. Therefore, it is connected to the public radio network base station 7-2. The public radio network base stations 7-1 and 7-2 are connected by a
このように無線LANと公衆無線回線を含む通信システムは、無線端末が存在する位置に従って公衆無線回線と無線LANとを切替えることにより、最適な使用料金で有線・無線の混在した多彩な接続が可能となる。 In this way, a communication system that includes a wireless LAN and a public wireless line can switch between a public wireless line and a wireless LAN according to the location where the wireless terminal is located, thereby enabling a variety of wired and wireless connections at an optimal usage fee. It becomes.
次に、本発明が適用される公衆無線回線と無線LAN対応の無線端末のハ−ドウェア構成について、図2を用いて説明する。図2は、本発明が適用される公衆無線回線と無線LAN対応の無線端末1−1,1−2,1−3,1−4,1−5の内部構成を示すブロック構成図である。 Next, a hardware configuration of a public wireless line and a wireless terminal compatible with a wireless LAN to which the present invention is applied will be described with reference to FIG. FIG. 2 is a block diagram showing an internal configuration of the wireless terminals 1-1, 1-2, 1-3, 1-4, and 1-5 that are compatible with public wireless lines and wireless LANs to which the present invention is applied.
公衆無線回線および無線LAN対応の無線端末1は、情報通信端末部1Aと無線部1Bとから構成される。無線部1Bは、無線LAN用ブロック17と、公衆無線回線用ブロック29を有しており、無線LANに対応する無線LAN用ブロック17は、アンテナ11と、RF(Radio Frequency)部12と、受信電力測定部12−1と、ベースバンド部13と、MAC(Media Access Controller)層処理部14と、上位層処理部15とを備えている。また、無線部1Bは、公衆無線回線に対応する公衆無線回線用ブロック29は、アンテナ21と、RF(Radio Frequency)部22と、ベースバンド部23と、MAC(Media Access Controller)層処理部24と、上位層処理部25とを備えている。さらに、無線部1Bは、無線LAN用ブロック17と公衆無線回線用ブロック29とで共用する端末インタフェ−ス部16と、通信処理部10と、プログラムメモリ10−1と、ワ−クメモリ10−2とを備えている。
A
RF部12およびRF部22と、ベースバンド部13およびベースバンド部23と、MAC層処理部14およびMAC層処理部24と、上位層処理部15および上位層処理部25と、端末インタフェ−ス部16は、バス19を経由して通信処理部10に接続されている。
RF unit 12 and RF unit 22, baseband unit 13 and
通信処理部10は、プログラムメモリ10−1内の制御プログラムや設定デ−タに従い、ワ−クメモリ10−2を使用しつつ、RF部12およびRF部22と、ベースバンド部13およびベースバンド部23と、MAC層処理部14およびMAC層処理部24と、上位層処理部15および上位層処理部15と、端末インタフェ−ス部16とを含む無線部1B全体を制御している。
The
情報通信端末部1Aは、パソコン等の情報処理装置、PDA(Personal Digital Assistant)等の情報端末またはIP電話機等の電話端末であり、これら情報端末または電話端末から送られてきたデ−タや音声符号化信号を端末インタフェ−ス部16に送出し、または端末インタフェ−ス部16からのデ−タや音声符号化信号を受信し情報端末または電話端末に送出する。 The information communication terminal unit 1A is an information processing apparatus such as a personal computer, an information terminal such as a PDA (Personal Digital Assistant), or a telephone terminal such as an IP telephone, and data and audio sent from these information terminals or telephone terminals. The encoded signal is transmitted to the terminal interface unit 16, or the data and voice encoded signal from the terminal interface unit 16 are received and transmitted to the information terminal or the telephone terminal.
無線部1Bにおいて、端末インタフェ−ス部16は、情報通信端末部1Aと無線部1Bと間を相互にデ−タや音声符号化信号を転送するためのインタフェ−スに係る処理を行う手段である。
In the
上位層処理部15は、ネットワ−ク層/トランスポ−ト層に係るIPパケット処理を行い、ネットワ−ク層/トランスポ−ト層間を伝送させる手段であって、IPアドレスやTCPポ−ト番号またはUDPポ−ト番号を含むIPヘッダの付与または削除の処理を行う手段である。 The upper layer processing unit 15 is a means for performing IP packet processing related to the network layer / transport layer and transmitting between the network layer / transport layer, and includes an IP address, TCP port number or It is a means for performing processing for adding or deleting an IP header including a UDP port number.
MAC層処理部14は、デ−タリンク層に係るIPパケット処理を行う手段で、IEEE802.11に従って、デ−タや音声バケットデ−タが格納されたIPパケットを組立てしまたは分解し、デ−タリンク層間を伝送させるためにMACアドレスの付与または削除する手段である。 The MAC layer processing unit 14 is a means for performing IP packet processing related to the data link layer, and assembles or disassembles IP packets storing data and voice bucket data in accordance with IEEE802.11, and data links. A means for assigning or deleting a MAC address for transmission between layers.
ベースバンド部13は、IPパケットを変調してベースバンド信号を生成し、または、ベースバンド信号を復調して元のIPパケットに復元する手段である。 The baseband unit 13 is means for modulating the IP packet to generate a baseband signal, or demodulating the baseband signal to restore the original IP packet.
RF部12は、ベースバンド部13から受信したベースバンド信号をIEEE802.11に従って搬送無線周波数に載せ、アンテナ11から無線信号として送出し、逆に、アンテナ11から受信した無線信号をベースバンド信号に復元し、ベースバンド部13に送出する手段である。 The RF unit 12 puts the baseband signal received from the baseband unit 13 on the carrier radio frequency in accordance with IEEE 802.11, transmits the radio signal from the antenna 11 as a radio signal, and conversely converts the radio signal received from the antenna 11 into a baseband signal. It is means for restoring and sending it to the baseband unit 13.
上位層処理部25は、公衆無線回線のネットワ−ク層/トランスポ−ト層に係るパケット処理を行い、ネットワ−ク層/トランスポ−ト層間を伝送させる手段である。 The upper layer processing unit 25 is a means for performing packet processing related to the network layer / transport layer of the public wireless line and transmitting the data between the network layer / transport layer.
MAC層処理部24は、公衆無線回線のデ−タリンク層に係る処理を行う手段である。
The MAC
ベースバンド部23は、MAC層処理部24からの信号を変調してベースバンド信号を生成し、または、ベースバンド信号を復調して信号に復元してMAC層24に送出する手段である。
The
RF部22は、ベースバンド部23から受信したベースバンド信号を公衆無線回線の規格に従って搬送無線周波数に載せ、アンテナ21から無線信号として送出し、逆に、アンテナ21から受信した無線信号をベースバンド信号に復元し、ベースバンド部23に送出する手段である。
The RF unit 22 puts the baseband signal received from the
次に、情報通信端末部1Aが生成したデ−タや音声符号化信号をアンテナ11経由で無線LANに送出する場合の動作を説明する。端末インタフェ−ス部16は、情報通信端末部1Aからのデ−タや音声符号化信号を上位層処理部15に送る。 Next, an operation when data and a voice encoded signal generated by the information communication terminal unit 1A are transmitted to the wireless LAN via the antenna 11 will be described. The terminal interface unit 16 sends data and a voice encoded signal from the information communication terminal unit 1A to the upper layer processing unit 15.
上位層処理部15は、IPアドレス付与・TCP/UDPポ−ト番号の付与等のIPヘッダ処理を施してIPパケットを生成した後、MAC層処理部14に送出する。 The upper layer processing unit 15 generates an IP packet by performing IP header processing such as IP address assignment / TCP / UDP port number assignment, and then sends the IP packet to the MAC layer processing unit 14.
MAC層処理部14は、上位層処理部15からIPパケットにIEEE802.11の処理手順に従ったMACアドレス付与等のMAC処理を施し、ベースバンド部13に送出する。 The MAC layer processing unit 14 subjects the IP packet from the upper layer processing unit 15 to MAC processing such as MAC address assignment according to the IEEE 802.11 processing procedure, and sends the IP packet to the baseband unit 13.
ベースバンド部13は、受信したIPパケットをIEEE802.11に従って変調してベースバンド信号を生成し、RF部12に送出する。 The baseband unit 13 modulates the received IP packet according to IEEE 802.11, generates a baseband signal, and sends the baseband signal to the RF unit 12.
RF部12は、ベースバンド部13からのベースバンド信号をIEEE802.11に従って搬送無線周波数に載せ、アンテナ11から無線信号としてアクセスポイント2−1,2−2,2−3,2−4に向けて送出する。 The RF unit 12 places the baseband signal from the baseband unit 13 on the carrier radio frequency in accordance with IEEE 802.11, and directs the antenna 11 to the access points 2-1, 2-2, 2-3 and 2-4 as a radio signal. And send it out.
次に、情報通信端末部1Aが生成したデ−タや音声符号化信号をアンテナ21経由で公衆無線回線に送出する場合の動作を説明する。端末インタフェ−ス部16は、情報通信端末部1Aからのデ−タや音声符号化信号を上位層処理部25に送る。
Next, an operation in the case where data and a voice encoded signal generated by the information communication terminal unit 1A are transmitted to the public wireless line via the
上位層処理部25は、トランスポ−ト層/ネットワ−ク層の処理を施して信号を生成した後、MAC層処理部24に送出する。
The upper layer processing unit 25 performs a transport layer / network layer process to generate a signal, and then sends the signal to the MAC
MAC層処理部24は、上位層処理部25から受信した信号を公衆無線回線の処理手順に従ったデ−タリンク層の処理を施し、ベースバンド部23に送出する。
The MAC
ベースバンド部23は、受信した信号を変調してベースバンド信号を生成し、RF部22に送出する。
The
RF部22は、公衆無線回線に従って搬送無線周波数に載せ、アンテナ21から無線信号として公衆無線回線に向けて送出する。
The RF unit 22 puts on the carrier radio frequency according to the public radio line, and transmits the radio signal from the
次に、アクセスポイントから伝送された信号を受信し、情報通信端末部に出力する場合の動作を説明する。アンテナ11が、アクセスポイント2−1,2−2,2−3から受信した無線信号をRF部12に送出する。 Next, the operation when receiving a signal transmitted from the access point and outputting it to the information communication terminal unit will be described. The antenna 11 transmits the radio signal received from the access points 2-1, 2-2, 2-3 to the RF unit 12.
RF部12は、受信した無線信号から搬送無線周波数を除去してベースバンド信号に復元し、ベースバンド部13に送出する。 The RF unit 12 removes the carrier radio frequency from the received radio signal, restores it to a baseband signal, and sends it to the baseband unit 13.
受信電力測定部12−1は、RF部12からのベースバンド信号から受信電力を検出する。 The reception power measurement unit 12-1 detects reception power from the baseband signal from the RF unit 12.
ベースバンド部13は、受信したベースバンド信号を復調して元のIPパケットに復元し、MAC層処理部14に送出する。 The baseband unit 13 demodulates the received baseband signal, restores it to the original IP packet, and sends it to the MAC layer processing unit 14.
MAC層処理部14は、受信したIPパケットからIEEE802.11に従ってMACアドレスを削除し、上位層処理部15に送出する。 The MAC layer processing unit 14 deletes the MAC address from the received IP packet according to IEEE 802.11, and sends it to the upper layer processing unit 15.
上位層処理部15は、MAC層処理部14からのIPパケットから設定デ−タに基づきTCP・UDPヘッダやIPヘッダの削除し、得られたデ−タや音声符号化信号を端末インタフェ−ス部16経由で情報通信端末部1Aに送る。 The upper layer processing unit 15 deletes the TCP / UDP header and the IP header from the IP packet from the MAC layer processing unit 14 based on the setting data, and the obtained data and voice encoded signal are transmitted to the terminal interface. The information is sent to the information communication terminal unit 1A via the unit 16.
次に、公衆無線回線から伝送された信号を受信し、情報通信端末部1Aに出力する場合の動作を説明する。アンテナ21が、公衆無線回線基地局7−1,7−2から受信した無線信号をRF部22に送出する。
Next, an operation when a signal transmitted from a public wireless line is received and output to the information communication terminal unit 1A will be described. The
RF部22は、受信した無線信号から搬送無線周波数を除去してベースバンド信号に復元し、ベースバンド部23に送出する。
The RF unit 22 removes the carrier radio frequency from the received radio signal, restores it to a baseband signal, and sends it to the
ベースバンド部23は、受信したベースバンド信号を復調して元のIPパケットに復元し、MAC層処理部24に送出する。
The
MAC層処理部24は、受信した信号から公衆無線回線のデ−タリンク層の規格に従って処理し、上位層処理部25に送出する。
The MAC
上位層処理部25は、MAC層処理部24からの信号を公衆無線回線用のネットワ−ク層、トランスポ−ト層の規格に従い処理し、端末インタフェ−ス部16経由で情報通信端末部1Aに送る。
The upper layer processing unit 25 processes the signal from the MAC
次に、公衆と無線LANの第1の実施例におけるローミング動作を、図3を用いて説明する。移動中の無線端末と他の無線端末間で、無線LANを用いて通信をしている(S1)状態で、移動中の無線端末が、無線LANの領域から次第に外れ、無線LAN電波の受信電力が閾値TH1以下となるのを無線LAN電波の受信電力測定部12−1が検出する(S2)と、その結果を通信処理部10に通知する。通信処理部10は、ユ−ザに公衆無線回線への切替え要求を表示する(S3)。切替え要求の表示としては、無線端末を振動させることや、または警告音を出力させることや、それらと併せて、または単独で、図7に例示するように、無線端末内の表示画面52に相手先の公衆無線回線の電話番号や相手先の名称や「切替え承認」や「切替え不承認」の操作方法を表示する、などが考えられる。
Next, the roaming operation in the first embodiment of the public and wireless LAN will be described with reference to FIG. In a state where wireless LAN is communicating between the moving wireless terminal and another wireless terminal (S1), the moving wireless terminal gradually moves out of the wireless LAN area, and the received power of the wireless LAN radio wave. When the wireless LAN radio wave reception power measuring unit 12-1 detects that the value becomes equal to or less than the threshold value TH1 (S2), the
ユ−ザが無線端末内の操作キ−51の押下(S4)などにより切替え要求を承認する(S5)と、移動中の無線端末の通信処理部10は、無線LAN用ブロック19経由で無線LAN切断を他の無線端末に要求し(S6)、了解信号が戻ってきたら(S7)無線LAN用ブロック19を停止して無線LANによる通信を切断する。通信処理部10は、公衆無線回線用ブロック29を起動して他の無線端末に発呼して(S8)、他の無線端末から了解信号が応答されたら(S9)、公衆無線回線による通信を開始する(S10)。
When the user approves the switching request by pressing the operation key 51 in the wireless terminal (S4) or the like (S5), the
なお、ステップS3の切替え要求をユ−ザが承認しない場合は、図示していないが、公衆無線回線へ切替えずに、無線LANによる通信を継続する。 If the user does not approve the switching request in step S3, communication via the wireless LAN is continued without switching to the public wireless line, although not shown.
ステップS3の切替え要求に対してユ−ザが承認も不承認もしない場合は、切替え要求を一定時間表示した後にこの表示を自動的に中止しても良いし、ユ−ザが不承認した場合は直ちに表示を中止しても良い。 If the user does not approve or reject the switching request in step S3, this display may be automatically stopped after the switching request is displayed for a certain period of time, or immediately if the user disapproves. The display may be canceled.
また、無線LAN電波の受信電力が再び大きくなったことを無線LAN電波の受信電力測定部12−1が検出して通信処理部10に通知した時には通信処理部10は、切替え要求表示を中止しても良い。
In addition, when the wireless LAN radio wave reception power measurement unit 12-1 detects that the reception power of the wireless LAN radio wave has increased again and notifies the
無線端末が公衆無線回線と無線LANでの通話を同時に行える構成であるときには、ステップS6からステップS10の処理は、公衆無線回線で発呼した後、公衆無線回線での通話を行い、その後無線LANを切断するようにしてもよい。 When the wireless terminal is configured to be able to make a call on the public wireless line and the wireless LAN at the same time, the processing from step S6 to step S10 performs a call on the public wireless line after making a call on the public wireless line, and then the wireless LAN. May be cut off.
次に移動中の無線端末が、再び無線LANの領域に接近して無線LAN電波の受信電力が閾値TH2以上となるのを、無線LAN電波の受信電力測定部12−1が検出して(S11)通信処理部10に通知した時には、通信処理部10は、ユ−ザに無線LANへの切替え要求を表示する(S12)。無線LANへの切替え要求を表示画面52に表示する場合の一例を図8に示す。ユ−ザが無線端末内の操作キ−の押下(S13)などにより切替え要求を承認する(S14)と、移動中の無線端末の通信処理部10は、公衆回線用ブロック29経由で公衆無線回線切断を他の無線端末に要求し(S15)、他の無線端末から了解信号が戻ってきたら(S16)、公衆回線用ブロック29を停止して公衆回線を切断する。ついで、通信処理部10は、無線LAN用ブロック19を起動して無線LANブロック17経由で他の無線端末に無線LANで発呼して(S17)、他の無線端末から了解信号が応答されたら(S17)無線LANで通信を開始する(S19)。
Next, the wireless LAN radio wave reception power measuring unit 12-1 detects that the moving radio terminal again approaches the wireless LAN area and the radio LAN radio wave reception power becomes equal to or greater than the threshold value TH2 (S11). ) When notified to the
なお、ステップS12の切替え要求をユ−ザが承認しない場合は、図示していないが、無線LANへ切替えずに公衆無線回線による通信を継続する。その場合の表示方法は、ステップS3における表示方法と同様としても良い。すなわち、ユ−ザが切替え要求を承認も不承認もしない場合は、切替え要求を一定時間表示した後に表示を自動的に中止しても良いし、ユ−ザが不承認した場合は直ちに表示を中止しても良い。 If the user does not approve the switching request in step S12, communication via the public wireless line is continued without switching to the wireless LAN, although not shown. The display method in that case may be the same as the display method in step S3. In other words, if the user does not approve or reject the switching request, the switching request may be displayed for a certain period of time, and then the display may be automatically stopped. If the user does not approve, the display is immediately stopped. May be.
また、無線LAN電波の受信電力が再び小さくなって無線LANによる通信が困難になったことを無線LAN電波の受信電力測定部12−1が検出して通信処理部10に通知した時には、通信処理部10は、切替え要求表示を中止しても良い。
In addition, when the wireless LAN radio wave reception power measuring unit 12-1 detects that the wireless LAN radio wave reception power has decreased again and communication via the wireless LAN has become difficult and notifies the
なお、公衆無線回線と無線LAN間で煩雑に切替えないようにヒステリシスを持たせるために、ステップS2およびステップS11における上記閾値TH1,TH2は、以下の順序の大きさを持つものとする。
TH1<TH2
Note that the thresholds TH1 and TH2 in step S2 and step S11 have the following magnitudes in order to provide hysteresis so as not to switch between the public wireless line and the wireless LAN.
TH1 <TH2
無線端末が公衆無線回線と無線LANでの通話を同時に行える構成であるときには、ステップS15からステップS19の処理は、公衆無線回線で発呼した後、公衆無線回線での通話を行い、その後無線LANを切断するようにしてもよい。 When the wireless terminal is configured to be able to make a call on the public wireless line and the wireless LAN at the same time, the processing from step S15 to step S19 performs a call on the public wireless line after making a call on the public wireless line, and then the wireless LAN. May be cut off.
次に、公衆無線回線と無線LAN間の第2の実施例におけるローミング動作を、図4を用いて説明する。移動中の無線端末と他の無線端末間で、無線LANを用いて通信をしている(S21)状態で、移動中の無線端末が、無線LANの領域から次第に外れ、無線LAN電波受信電力が閾値TH1以下となるのを無線LAN電波の受信電力測定部12−1が検出すると(S22)、その結果を通信処理部10に通知する。通信処理部10は、該無線端末が接続しているAPの位置をAP位置管理(プレゼンスサーバ)に問い合わせる(S23)。接続しているAPの位置は、APの識別番号(物理アドレスなど)と位置とを無線端末に予め登録しておけば良い。AP位置管理からAPの位置応答がある(S24)と、APが例えば玄関付近にあることを確認し(S25)、APが玄関近傍にあるときには、移動中の無線端末も玄関の周辺を移動中と想定され、さらに移動して無線LANの領域から完全に外れるとも予想される。そこで移動中の無線端末の通信処理部10は、無線LAN用ブロック17経由で無線LANの切断を他の無線端末に要求し(S26)、了解信号が戻ってきたら(S27)無線LAN用ブロック17を停止して無線LANによる通信を切断する。次いで、通信処理部10は、公衆無線回線用ブロック29を起動して他の無線端末に発呼して(S28)、他の無線端末から了解信号が応答されたら(S29)公衆無線回線による通信を開始する(S30)。
Next, the roaming operation in the second embodiment between the public wireless line and the wireless LAN will be described with reference to FIG. In a state where the wireless terminal is in communication with the wireless terminal that is moving and another wireless terminal (S21), the wireless terminal that is moving is gradually removed from the wireless LAN area, and the wireless LAN radio wave reception power is increased. When the wireless LAN radio wave reception power measuring unit 12-1 detects that the threshold TH1 or less is reached (S22), the
なお、ステップS24の位置応答でAPが玄関付近に設置されていないと確認された場合は、図示していないが、公衆無線回線へ切替えずに、無線LANによる通信を継続する。 If it is confirmed by the position response in step S24 that the AP is not installed near the entrance, communication via the wireless LAN is continued without switching to the public wireless line, although not shown.
無線端末が公衆無線回線と無線LANでの通話を同時に行える構成であるときには、ステップS26からステップS27の処理は、公衆無線回線で発呼の後、公衆無線回線で通話中とし、その後無線LANを切断するようにしてもよい。 When the wireless terminal is configured to be able to make a call on the public wireless line and the wireless LAN at the same time, the processing from step S26 to step S27 is performed after the call is made on the public wireless line and then on the public wireless line. You may make it cut | disconnect.
次に、移動中の無線端末が再び無線LAN電波の到達範囲内に入り、無線LAN電波受信電力が閾値TH2以上となるのを無線LAN電波の受信電力測定部12−1が検出して(S31)通信処理部10に通知した時には、通信処理部10は、再び移動中の無線端末が接続しているAPの位置をAP位置管理に問い合わせ(S32)、APの位置応答によって(S33)、APの位置を確認する。
Next, the wireless LAN radio wave received power measuring unit 12-1 detects that the moving wireless terminal is within the wireless LAN radio wave reach again and the wireless LAN radio wave received power is equal to or greater than the threshold value TH2 (S31). When the
接続中のAPが例えば玄関付近にあると判断された場合には、移動中の無線端末も玄関の周辺を移動中と想定され、さらに移動して無線LAN電波の到達範囲内に完全に入ると予想される。そこで移動中の無線端末の通信処理部10は、公衆無線回線用ブロック29経由で公衆無線回線切断を他の無線端末に要求し(S34)、了解信号が戻ってきたら(S35)公衆無線回線用ブロック29を停止して公衆回線を切断する。次いで、通信処理部10は無線LAN用ブロック17を起動して、無線LAN用ブロック17経由で他の無線端末に発呼して(S36)了解信号が応答されたら(S37)無線LANによる通信を開始する(S38)。
If it is determined that the connected AP is near the entrance, for example, it is assumed that the moving wireless terminal is also moving around the entrance, and further moves and enters the wireless LAN radio wave reachable range. is expected. Therefore, the
なお、ステップS33の位置応答で、接続中のAPが玄関付近に設置されていないと判断された場合は、図示していないが、無線LANへ切替えずに、公衆無線回線による通信を継続する。 If it is determined in the position response of step S33 that the connected AP is not installed near the entrance, communication via the public wireless line is continued without switching to the wireless LAN, although not shown.
無線端末が公衆無線回線と無線LANでの通話を同時に行える構成であるときには、ステップS34からステップS38の処理は、無線LANで発呼の後、無線LANで通話中とし、その後公衆無線回線を切断するようにしてもよい。 When the wireless terminal is configured to be able to make a call on the public wireless line and the wireless LAN at the same time, the processing from step S34 to step S38 is a call made on the wireless LAN after making a call on the wireless LAN, and then the public wireless line is disconnected. You may make it do.
以上で示した第1、第2の実施例の動作を、図5および図6のフローチャートを用いて説明する。最初に図5で第1の実施例を説明する。始めに、ユ−ザが発呼操作するのを待つ。ユーザが、発呼操作したら(S41)無線LAN電波の受信電力を測定し、予め定めた閾値TH0と比較する(S42)。閾値TH0以上の場合(Yes)は無線LANで通信できる領域なので、無線LANで発呼する(S43)。閾値TH0未満の場合(No)は無線LAN電波の受信電力が小さく無線LANによる通信が困難な領域なので、公衆無線回線で発呼する(S49)。 The operation of the first and second embodiments described above will be described with reference to the flowcharts of FIGS. First, the first embodiment will be described with reference to FIG. First, wait for the user to make a call. When the user performs a call operation (S41), the received power of the wireless LAN radio wave is measured and compared with a predetermined threshold TH0 (S42). When the threshold value is TH0 or more (Yes), since the area is communicable with the wireless LAN, a call is made with the wireless LAN (S43). If it is less than the threshold TH0 (No), since the reception power of the wireless LAN radio wave is small and communication by the wireless LAN is difficult, a call is made on the public wireless line (S49).
無線LANで発呼した後、ユ−ザが切断操作するかを監視し(S44)、切断操作した場合(Yes)は無線LANの通信を切断して(S56)、ステップS41に戻る。ステップS44で切断操作しなかった場合(No)は、無線LAN電波の受信電力を測定して閾値TH1と比較する(S45)。無線LAN電波の受信電力が閾値TH1以上の場合はステップS44に戻り、切断操作の有無を監視しながら無線LANによる通信を継続する。 After calling on the wireless LAN, it is monitored whether or not the user performs a disconnection operation (S44). If the disconnection operation is performed (Yes), the wireless LAN communication is disconnected (S56), and the process returns to step S41. If the disconnection operation is not performed in step S44 (No), the received power of the wireless LAN radio wave is measured and compared with the threshold value TH1 (S45). If the received power of the wireless LAN radio wave is equal to or greater than the threshold value TH1, the process returns to step S44, and communication by the wireless LAN is continued while monitoring the presence or absence of a disconnection operation.
ステップS45の比較結果が、閾値TH1未満の場合(No)は、本実施例の特徴として公衆無線回線への切替え要求をユ−ザに表示し(S46)、ユーザの承認を監視する(S47)する。公衆無線回線への切替えをユ−ザが承認した場合(Yes)は、無線LANの通信を切断した後、公衆無線回線でハンドオーバー発呼して通信を開始し、公衆無線回線での通信が開始したら(S48)、ステップS50へ遷移する。ユ−ザが承認しなかった場合(No)は切替えずにステップS44の切断操作監視に遷移する。 When the comparison result in step S45 is less than the threshold value TH1 (No), a feature of this embodiment is to display a request for switching to a public wireless line to the user (S46) and monitor user approval (S47). To do. If the user approves switching to the public wireless line (Yes), after disconnecting the wireless LAN communication, a handover call is initiated on the public wireless line and communication is started. If started (S48), the process proceeds to step S50. If the user does not approve (No), the process proceeds to the disconnection operation monitoring in step S44 without switching.
ステップS50の切断操作監視において、切断操作を検出した場合(Yes)は公衆無線回線の通信を切断してステップS41に戻る。 If the disconnection operation is detected in the disconnection operation monitoring in step S50 (Yes), the communication on the public wireless line is disconnected and the process returns to step S41.
ステップS50の切断操作監視において、切断操作がなされない場合(No)には、無線LAN電波の受信電力を測定し、閾値TH2と比較する(S51)。無線LAN電波の受信電力が閾値TH2未満の場合(No)はステップS50の切断操作監視に戻り、公衆無線回線による通信を継続する。 In the disconnection operation monitoring in step S50, when the disconnection operation is not performed (No), the received power of the wireless LAN radio wave is measured and compared with the threshold value TH2 (S51). When the received power of the wireless LAN radio wave is less than the threshold value TH2 (No), the process returns to the disconnection operation monitoring in step S50, and the communication via the public wireless line is continued.
ステップS51において、無線LAN電波の受信電力が閾値TH2以上の場合(No)は、本実施例の特徴として無線LANへの切替え要求をユ−ザに表示する(S52)。 If the received power of the wireless LAN radio wave is greater than or equal to the threshold value TH2 in step S51 (No), a request for switching to the wireless LAN is displayed to the user as a feature of this embodiment (S52).
ユーザの承認があるかを監視し(S53)、無線LANへの切替えをユ−ザが承認した場合(Yes)は、公衆無線回線の通信を切断した後、無線LANでハンドオーバー発呼して通信を開始し、無線LANによる通信を開始したら(S54)、ステップS44へ遷移して無線LANによる通信を行う。ステップS53において、ユ−ザが無線LANへの切り替えを承認しなかった場合(No)は無線LANへ切替えずにステップS50に遷移する。 If the user approves (S53), and the user approves the switch to the wireless LAN (Yes), after disconnecting the communication of the public wireless line, a handover call is made in the wireless LAN. When communication is started and communication by wireless LAN is started (S54), the process proceeds to step S44 to perform communication by wireless LAN. If the user does not approve switching to the wireless LAN in step S53 (No), the process proceeds to step S50 without switching to the wireless LAN.
ステップS42で無線LAN電波の受信電力が閾値TH0未満のとき(No)は、ステップS43へ遷移して公衆無線回線で発呼し(S49)、以下ステップS50以降を実行して、無線LANでの通信に移行するときには、ステップS54→ステップS44に移行して無線LANによる通信を継続する。 If the received power of the wireless LAN radio wave is less than the threshold value TH0 in step S42 (No), the process proceeds to step S43 and a call is made on the public wireless line (S49). When shifting to communication, the process proceeds from step S54 to step S44, and communication by the wireless LAN is continued.
なお、ここで新たに現れた閾値TH0の値は、公衆無線回線と無線LAN間で煩雑な切替えを避けるために、以下の順序の大きさを持つものとする。
TH1<TH0<TH2
Note that the value of the threshold TH0 that newly appears here has the following order of magnitude in order to avoid complicated switching between the public wireless line and the wireless LAN.
TH1 <TH0 <TH2
次に、図6を用いて第2の実施例を説明する。始めに、ユ−ザが発呼操作するのを待つ(S61)。ユーザが発呼操作したら(Yes)無線LAN電波の受信電力を測定し、予め定めた閾値TH0と比較する(S62)。無線LANの電波の受信電力が閾値TH0以上の場合(Yes)は無線LANで通信できる領域なので無線LANで発呼して(S63)に遷移する。無線LANの電波の受信電力が閾値TH0未満の場合(No)は無線LANでは通信しにくい領域なので、公衆無線回線で発呼して(S69)、ステップS70へ遷移する。 Next, a second embodiment will be described with reference to FIG. First, it waits for the user to make a call operation (S61). When the user performs a call operation (Yes), the wireless LAN radio wave reception power is measured and compared with a predetermined threshold TH0 (S62). When the received power of the radio wave of the wireless LAN is equal to or higher than the threshold TH0 (Yes), since the area is communicable with the wireless LAN, a call is made on the wireless LAN and the process proceeds to (S63). When the received power of the radio wave of the wireless LAN is less than the threshold TH0 (No), since it is an area that is difficult to communicate with the wireless LAN, a call is made on the public wireless line (S69), and the process proceeds to step S70.
無線LANによる通信において、ユ−ザが切断操作するかを監視し(S63)、切断操作した場合(Yes)は無線LANの通信を切断して(S75)、ステップS61に戻る。ステップS64において切断操作がない場合(No)は、無線LAN電波の受信電力を測定し、閾値TH1と比較する(S65)。閾値TH1以上の場合(Yes)は、ステップS64に戻り、無線LANによる通信を継続する。 In the wireless LAN communication, it is monitored whether or not the user performs a disconnecting operation (S63). If the disconnecting operation is performed (Yes), the wireless LAN communication is disconnected (S75), and the process returns to step S61. If there is no disconnection operation in step S64 (No), the received power of the wireless LAN radio wave is measured and compared with the threshold value TH1 (S65). If it is equal to or higher than the threshold value TH1 (Yes), the process returns to step S64, and communication by the wireless LAN is continued.
ステップS65において、閾値TH1未満の場合(No)は、本実施例の特徴として移動中の無線端末が接続しているAPの位置を確認する(S66)。接続しているAPの位置が玄関近くであるかを判断し(S67)、接続しているAPが例えば玄関周辺に設置されている場合(Yes)は、無線LANの通信を切断した後、公衆無線回線でハンドオーバー発呼して通信を開始し、公衆無線回線で通信を開始したら(S68)、ステップS70へ遷移する。ステップS67で例えば玄関周辺に設置されていない場合(No)は公衆無線回線に切替えずにステップS64に遷移して無線LANによる通信を継続する。 In step S65, if it is less than the threshold TH1 (No), as a feature of the present embodiment, the position of the AP to which the moving wireless terminal is connected is confirmed (S66). It is determined whether the position of the connected AP is near the entrance (S67), and if the connected AP is installed near the entrance (Yes), for example, after disconnecting the wireless LAN communication, the public When a handover call is made on the wireless line and communication is started, and communication is started on the public wireless line (S68), the process proceeds to step S70. For example, if it is not installed around the entrance in step S67 (No), the process proceeds to step S64 without switching to the public wireless line, and communication by the wireless LAN is continued.
公衆無線回線への発呼による通信中にユ−ザが切断操作するかを監視し(S70)、切断操作した場合(Yes)は公衆無線回線の通信を切断して(S76)ステップS61に戻る。ステップS70で、切断操作しなかった場合(No)は、無線LAN電波の受信電力を測定し閾値TH2と比較する(S71)。 It is monitored whether the user disconnects during communication by calling to the public wireless line (S70). If the disconnection operation is performed (Yes), the communication on the public wireless line is disconnected (S76) and the process returns to step S61. . In step S70, when the disconnection operation is not performed (No), the received power of the wireless LAN radio wave is measured and compared with the threshold value TH2 (S71).
ステップS71において、無線LAN電波の受信電力が閾値TH2未満の場合(No)はステップS70に戻り、公衆無線回線による通信を継続する。ステップS71において、無線LAN電波の受信電力が閾値TH2以上の場合(Yes)は、本実施例の特徴として移動中の無線端末が接続しているAPを確認する(S72)。次いで、接続されているAPの位置が玄関近傍であるか否かを判断し(S73)、接続しているAPが例えば玄関周辺に設置されている場合(Yes)は、公衆無線回線の通信を切断した後、無線LANブロック17を起動し、無線LANでハンドオーバー発呼して通信を開始し、無線LANによる通信を開始したら(S74)、ステップS64へ遷移する。ステップS73において、例えば玄関周辺に設置されていない場合(No)は無線LANによる通信に切替えずにステップS70に遷移して公衆無線回線による通信を継続する。 In step S71, if the received power of the wireless LAN radio wave is less than the threshold value TH2 (No), the process returns to step S70, and communication via the public wireless line is continued. If the received power of the wireless LAN radio wave is greater than or equal to the threshold value TH2 in step S71 (Yes), as a feature of the present embodiment, the AP to which the moving wireless terminal is connected is confirmed (S72). Next, it is determined whether or not the position of the connected AP is near the entrance (S73). If the connected AP is installed near the entrance (Yes), for example, the communication of the public wireless line is performed. After disconnection, the wireless LAN block 17 is activated, a handover call is made in the wireless LAN to start communication, and when communication by the wireless LAN is started (S74), the process proceeds to step S64. In step S73, for example, when it is not installed around the entrance (No), the process proceeds to step S70 without switching to the wireless LAN communication, and the communication via the public wireless line is continued.
なお、ステップS73における判断で「例えば玄関周辺」としているのは、ユ−ザが移動して無線LAN電波が移動に伴って完全に無くなり、または逆に十分に大きくなることを期待できる場合であり、同等の結果を期待できる場合には、そのAPの位置は上記玄関付近に含まれることは明らかである。 In the determination in step S73, “for example, the vicinity of the entrance” is a case where the user moves and the wireless LAN radio wave can be expected to disappear completely with the movement, or conversely, it can be expected to become sufficiently large. If an equivalent result can be expected, it is clear that the position of the AP is included in the vicinity of the entrance.
1:無線端末、2:アクセスポイント(AP)、3:ル−タ、4:有線端末、5:公衆有線網、6:無線LAN圏内、7:公衆無線回線基地局、8:公衆無線網、1A:情報通信端末部、1B:無線部、10:通信処理部、10−1:プログラムメモリ、10−2:ワ−クメモリ、11:アンテナ、12:RF部、12−1:無線電波の受信電力測定部、13:ベースバンド部、14:MAC処理部、15:上位層処理部、16:端末インタフェ−ス部、17:無線LAN用ブロック、19:バス、21:アンテナ、22:RF部、23:ベースバンド部、24:MAC処理部、25:上位層処理部、29:公衆無線回線用ブロック 1: wireless terminal, 2: access point (AP), 3: router, 4: wired terminal, 5: public wired network, 6: wireless LAN area, 7: public wireless network base station, 8: public wireless network, 1A: Information communication terminal unit, 1B: Wireless unit, 10: Communication processing unit, 10-1: Program memory, 10-2: Work memory, 11: Antenna, 12: RF unit, 12-1: Reception of radio wave Power measurement unit, 13: baseband unit, 14: MAC processing unit, 15: upper layer processing unit, 16: terminal interface unit, 17: wireless LAN block, 19: bus, 21: antenna, 22: RF unit , 23: Baseband unit, 24: MAC processing unit, 25: Upper layer processing unit, 29: Public wireless circuit block
Claims (5)
発呼操作を検知した場合、無線LAN電波の受信電力を測定して第一の閾値と比較し、無線LAN電波の受信電力が第一の閾値より高ければ無線LANを用いて発呼し、無線LAN電波の受信電力が第一の閾値より低ければ公衆無線回線で発呼し、
無線LANによる通信中に、無線LAN電波の受信電力を測定して第二の閾値と比較し、無線LAN電波の受信電力が第二の閾値未満の場合は、公衆無線回線への切替え要求を表示し、切替えの承認操作を検知した場合は、公衆無線回線による通信に切替え、
公衆無線回線による通信中に、無線LAN電波の受信電力を測定して第三の閾値と比較し、無線LAN電波の受信電力が第三の閾値以上の場合は、無線LANへの切替え要求を表示し、切替えの承認操作を検知した場合は無線LANによる通信に切替え、
前記第二の閾値は前記第一の閾値より低く、前記第三の閾値は前記第一の閾値より高いことを特徴とする無線端末。 In a wireless terminal having both a wireless telephone function using a public wireless line such as a cellular phone and a PHS and an IP telephone function using a wireless LAN,
When a call operation is detected, the received power of the wireless LAN radio wave is measured and compared with a first threshold value. If the received power of the wireless LAN radio wave is higher than the first threshold value, a call is made using the wireless LAN, If the received power of the LAN radio wave is lower than the first threshold, a call is made on the public wireless line,
During wireless LAN communication, the received power of the wireless LAN radio wave is measured and compared with the second threshold value. If the received power of the wireless LAN radio wave is less than the second threshold value, a request to switch to the public wireless line is displayed. If switching approval operation is detected, switch to public wireless communication,
During communication over a public wireless line, the received power of the wireless LAN radio wave is measured and compared with the third threshold value. If the received power of the wireless LAN radio wave is equal to or higher than the third threshold value, a request to switch to the wireless LAN is displayed. When switching approval operation is detected, switch to wireless LAN communication,
The wireless terminal, wherein the second threshold is lower than the first threshold, and the third threshold is higher than the first threshold .
前記切替え要求の表示は、表示部に切替えの可否を表示して問い合わせる手段により行い、前記切替えの承認操作の検知は、特定のキーを押し下げたことを検出する手段により行う
ことを特徴とする無線端末。 The wireless terminal according to claim 1, wherein
Display of the switch request is carried out by means of querying and displaying whether the switching on the display unit, the detection of the switching of the authorization operation, the <br/> be carried out by means for detecting that down the particular key Features wireless terminal.
発呼操作を検知した場合、無線LAN電波の受信電力を測定して第一の閾値と比較し、無線LAN電波の受信電力が第一の閾値より高ければ無線LANを用いて発呼し、無線LAN電波の受信電力が第一の閾値より低ければ公衆無線回線で発呼し、
無線LANによる通信中に、無線LAN電波の受信電力を測定して第二の閾値と比較し、無線LAN電波の受信電力が第二の閾値未満の場合は、接続されている無線LANのアクセスポイントの位置を確認して、アクセスポイントの位置が一定の位置である場合は公衆無線回線による通信に切替え、
公衆無線回線による通信中に、無線LAN電波の受信電力を測定して第三の閾値と比較し、無線LAN電波の受信電力が第三の閾値以上の場合は、接続されている無線LANのアクセスポイントの位置を確認して、アクセスポイントの位置が一定の位置である場合は無線LANによる通信に切替え、
前記第二の閾値は前記第一の閾値より低く、前記第三の閾値は前記第一の閾値より高いことを特徴とする無線端末。 In a wireless terminal having both a wireless telephone function using a public wireless line such as a cellular phone and a PHS and an IP telephone function using a wireless LAN ,
When a call operation is detected, the received power of the wireless LAN radio wave is measured and compared with a first threshold value. If the received power of the wireless LAN radio wave is higher than the first threshold value, a call is made using the wireless LAN, If the received power of the LAN radio wave is lower than the first threshold, a call is made on the public wireless line,
During wireless LAN communication, the received power of the wireless LAN radio wave is measured and compared with a second threshold value. If the received power of the wireless LAN radio wave is less than the second threshold value, the access point of the connected wireless LAN If the location of the access point is a fixed location, switch to public wireless communication,
During communication over a public wireless line, the received power of the wireless LAN radio wave is measured and compared with a third threshold. If the received power of the wireless LAN radio wave is greater than or equal to the third threshold, access to the connected wireless LAN Check the position of the point, and if the access point is a fixed position, switch to wireless LAN communication,
The wireless terminal, wherein the second threshold is lower than the first threshold, and the third threshold is higher than the first threshold .
前記無線端末は、
発呼操作を検知した場合、無線LAN電波の受信電力を測定して第一の閾値と比較し、無線LAN電波の受信電力が第一の閾値より高ければ無線LANを用いて発呼し、無線LAN電波の受信電力が第一の閾値より低ければ公衆無線回線で発呼し、
無線LANによる通信中に、無線LAN電波の受信電力を測定して第二の閾値と比較し、無線LAN電波の受信電力が第二の閾値未満の場合は、公衆無線回線への切替え要求を表示し、切替えの承認操作を検知した場合は、公衆無線回線による通信に切替え、
公衆無線回線による通信中に、無線LAN電波の受信電力を測定して第三の閾値と比較し、無線LAN電波の受信電力が第三の閾値以上の場合は、無線LANへの切替え要求を表示し、切替えの承認操作を検知した場合は無線LANによる通信に切替え、
前記第二の閾値は前記第一の閾値より低く、前記第三の閾値は前記第一の閾値より高いことを特徴とするローミング方法。 In a roaming method for switching between a public wireless line and a wireless LAN in a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN,
The wireless terminal is
When a call operation is detected, the received power of the wireless LAN radio wave is measured and compared with a first threshold value. If the received power of the wireless LAN radio wave is higher than the first threshold value, a call is made using the wireless LAN, If the received power of the LAN radio wave is lower than the first threshold, a call is made on the public wireless line,
During wireless LAN communication, the received power of the wireless LAN radio wave is measured and compared with the second threshold value. If the received power of the wireless LAN radio wave is less than the second threshold value, a request to switch to the public wireless line is displayed. If switching approval operation is detected, switch to public wireless communication,
During communication over a public wireless line, the received power of the wireless LAN radio wave is measured and compared with the third threshold value. If the received power of the wireless LAN radio wave is equal to or higher than the third threshold value, a request to switch to the wireless LAN is displayed. When switching approval operation is detected, switch to wireless LAN communication,
The roaming method, wherein the second threshold is lower than the first threshold, and the third threshold is higher than the first threshold .
前記無線端末は、
発呼操作を検知した場合、無線LAN電波の受信電力を測定して第一の閾値と比較し、無線LAN電波の受信電力が第一の閾値より高ければ無線LANを用いて発呼し、無線LAN電波の受信電力が第一の閾値より低ければ公衆無線回線で発呼し、
無線LANによる通信中に、無線LAN電波の受信電力を測定して第二の閾値と比較し、無線LAN電波の受信電力が第二の閾値未満の場合は、接続されている無線LANのアクセスポイントの位置を確認して、アクセスポイントの位置が一定の位置である場合は公衆無線回線による通信に切替え、
公衆無線回線による通信中に、無線LAN電波の受信電力を測定して第三の閾値と比較し、無線LAN電波の受信電力が第三の閾値以上の場合は、接続されている無線LANのアクセスポイントの位置を確認して、アクセスポイントの位置が一定の位置である場合は無線LANによる通信に切替え、
前記第二の閾値は前記第一の閾値より低く、前記第三の閾値は前記第一の閾値より高いことを特徴とするローミング方法。 In a roaming method for switching between a public wireless line and a wireless LAN in a wireless terminal having both a wireless telephone function using a public wireless line such as a mobile phone and a PHS and an IP telephone function using a wireless LAN,
The wireless terminal is
When a call operation is detected, the received power of the wireless LAN radio wave is measured and compared with a first threshold value. If the received power of the wireless LAN radio wave is higher than the first threshold value, a call is made using the wireless LAN, If the received power of the LAN radio wave is lower than the first threshold, a call is made on the public wireless line,
During wireless LAN communication, the received power of the wireless LAN radio wave is measured and compared with a second threshold value. If the received power of the wireless LAN radio wave is less than the second threshold value, the access point of the connected wireless LAN If the location of the access point is a fixed location, switch to public wireless communication,
During communication over a public wireless line, the received power of the wireless LAN radio wave is measured and compared with a third threshold. If the received power of the wireless LAN radio wave is greater than or equal to the third threshold, access to the connected wireless LAN Check the position of the point, and if the access point is a fixed position, switch to wireless LAN communication,
The roaming method, wherein the second threshold is lower than the first threshold, and the third threshold is higher than the first threshold .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005337305A JP4694356B2 (en) | 2005-11-22 | 2005-11-22 | Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005337305A JP4694356B2 (en) | 2005-11-22 | 2005-11-22 | Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007143038A JP2007143038A (en) | 2007-06-07 |
JP4694356B2 true JP4694356B2 (en) | 2011-06-08 |
Family
ID=38205313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005337305A Expired - Fee Related JP4694356B2 (en) | 2005-11-22 | 2005-11-22 | Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4694356B2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4902599B2 (en) * | 2008-06-30 | 2012-03-21 | 日本電信電話株式会社 | Wireless terminal device and wireless communication switching control method |
JP5338632B2 (en) * | 2009-11-18 | 2013-11-13 | 富士通株式会社 | Mobile terminal and communication method |
JP2012204845A (en) * | 2011-03-23 | 2012-10-22 | Denso Corp | Hands-free communication device |
JP5468595B2 (en) * | 2011-11-22 | 2014-04-09 | レノボ・シンガポール・プライベート・リミテッド | Method of accessing wireless network by shared communication and wireless terminal device |
EP2934027A4 (en) | 2012-12-13 | 2015-12-23 | Fujitsu Ltd | Wireless communication system |
JP2014195167A (en) * | 2013-03-28 | 2014-10-09 | Nippon Telegraph & Telephone East Corp | Telephone system and method for the same |
JP6364318B2 (en) * | 2014-10-29 | 2018-07-25 | 京セラ株式会社 | mobile phone |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002199426A (en) * | 2000-12-22 | 2002-07-12 | Denso Corp | Wireless communication system, network, and mobile terminal used for the wireless communication system |
JP2003101474A (en) * | 2001-09-26 | 2003-04-04 | Hitachi Kokusai Electric Inc | Mobile communication system |
JP2004096707A (en) * | 2002-08-29 | 2004-03-25 | Sk Telecom Kk | Connection system deciding apparatus and method based on wlan signal strength in wireless private information communication network and mobile telephone linked system, and mobile terminal therefor |
JP2004517574A (en) * | 2000-12-28 | 2004-06-10 | シンボル テクノロジーズ インコーポレイテッド | Automatic seamless vertical roaming between WLAN and WWAN |
JP2004312721A (en) * | 2003-03-24 | 2004-11-04 | Nec Corp | Portable telephone set and its communication system selection method |
WO2005018252A1 (en) * | 2002-08-02 | 2005-02-24 | Pctel Inc. | Systems and methods for seamless roaming between wireless networks |
JP2005192163A (en) * | 2003-12-26 | 2005-07-14 | Alps Electric Co Ltd | Communication method and mobile phone |
JP2005522894A (en) * | 2001-07-06 | 2005-07-28 | ジェネラル・インスツルメント・コーポレーション | Method, apparatus and system for accessing mobile phone network and voice over IP phone network with mobile handset |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040266426A1 (en) * | 2003-03-12 | 2004-12-30 | Marsh Gene W. | Extension of a local area phone system to a wide area network with handoff |
US7266101B2 (en) * | 2003-06-30 | 2007-09-04 | Motorola, Inc. | Fast handover through proactive registration |
-
2005
- 2005-11-22 JP JP2005337305A patent/JP4694356B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002199426A (en) * | 2000-12-22 | 2002-07-12 | Denso Corp | Wireless communication system, network, and mobile terminal used for the wireless communication system |
JP2004517574A (en) * | 2000-12-28 | 2004-06-10 | シンボル テクノロジーズ インコーポレイテッド | Automatic seamless vertical roaming between WLAN and WWAN |
JP2005522894A (en) * | 2001-07-06 | 2005-07-28 | ジェネラル・インスツルメント・コーポレーション | Method, apparatus and system for accessing mobile phone network and voice over IP phone network with mobile handset |
JP2003101474A (en) * | 2001-09-26 | 2003-04-04 | Hitachi Kokusai Electric Inc | Mobile communication system |
WO2005018252A1 (en) * | 2002-08-02 | 2005-02-24 | Pctel Inc. | Systems and methods for seamless roaming between wireless networks |
JP2004096707A (en) * | 2002-08-29 | 2004-03-25 | Sk Telecom Kk | Connection system deciding apparatus and method based on wlan signal strength in wireless private information communication network and mobile telephone linked system, and mobile terminal therefor |
JP2004312721A (en) * | 2003-03-24 | 2004-11-04 | Nec Corp | Portable telephone set and its communication system selection method |
JP2005192163A (en) * | 2003-12-26 | 2005-07-14 | Alps Electric Co Ltd | Communication method and mobile phone |
Also Published As
Publication number | Publication date |
---|---|
JP2007143038A (en) | 2007-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2064905B1 (en) | Method for establishing voice communications using a mobile handset | |
US8868075B2 (en) | Modular cell phone for fixed mobile convergence | |
JP4694356B2 (en) | Wireless terminal having wireless telephone function and IP telephone function, and roaming method between public wireless line and wireless LAN | |
TWI386080B (en) | Wireless lan terminal and handover method thereof | |
US20050180338A1 (en) | Swapping voice and video calls | |
US20030119548A1 (en) | Method for extending the coverage area of a licensed wireless communications system using an unlicensed wireless communications system | |
US20050037818A1 (en) | Providing a universal wireless headset | |
WO2005041595A1 (en) | Mobile communication terminal and communication management apparatus | |
JPH07154859A (en) | Mobile equipment, switchboard and mobile communication system | |
JP2003516680A (en) | How to transfer an ongoing call between a wireless phone and a wired phone using a near field control link | |
US9107237B2 (en) | Communication control method and a mobile communication terminal | |
JPH07177558A (en) | Packeted cellar communication | |
KR100429606B1 (en) | Multimedia service system and method utilizing bluetooth communication in mobile communication system | |
CN111479262A (en) | Service registration method, terminal and network side device | |
JP2005341300A (en) | Radio communication system, and radio communication apparatus | |
JP4433152B2 (en) | Method of handover in a multi-mode telecommunications network | |
US8737996B2 (en) | Communication system, communication terminal and controller | |
CN114727367A (en) | Wireless remote network distribution method, control center and equipment | |
JP2006279586A (en) | Mobile communication device and communication system including same | |
EP3457754B1 (en) | Data transmission method and base station | |
JP2005039317A (en) | Network relaying system, relaying apparatus, and user terminal | |
JP5109702B2 (en) | Communications system | |
KR100608793B1 (en) | Mobile communication terminal for dual band voip and his voip selection method | |
EP1597870B1 (en) | Method and system for handoff to a destination base station by measuring signal strength of carrier signals during at least one csma-backoff time | |
JP5003540B2 (en) | Communication control method and communication system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080916 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20100113 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20101006 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101012 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20101208 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110222 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110223 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140304 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
LAPS | Cancellation because of no payment of annual fees |