CN1981540A - 在蜂窝网络与因特网协议语音网络之间自动转换的电话 - Google Patents

在蜂窝网络与因特网协议语音网络之间自动转换的电话 Download PDF

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CN1981540A
CN1981540A CNA2005800067104A CN200580006710A CN1981540A CN 1981540 A CN1981540 A CN 1981540A CN A2005800067104 A CNA2005800067104 A CN A2005800067104A CN 200580006710 A CN200580006710 A CN 200580006710A CN 1981540 A CN1981540 A CN 1981540A
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V·加内桑
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    • H—ELECTRICITY
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    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • H04M1/2535—Telephone sets using digital voice transmission adapted for voice communication over an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446—Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/06—Details of telephonic subscriber devices including a wireless LAN interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

一种移动通信装置部分地包括蜂窝通信模块、适合于在移动通信模块和蜂窝网络之间收发数据的第一天线、无线保真(Wi－Fi)通信模块、适合于在Wi－Fi通信模块和VoIP网络之间收发数据的第二天线、信号监控电路以及适合于将现有的通信从蜂窝通信模块转换至Wi－Fi通信模块或者反过来的转换电路。

Description

在蜂窝网络与因特网协议语音网络之间自动转换的电话
相关申请的交叉引用
本申请根据35 USC 119(e)要求了2004年1月6日提交的题为“利用Wi-Fi信号强度值在蜂窝网络与Wi Fi网络之间自动转换的无线电话”的美国临时专利申请60/534466的提交日期的的权益，该临时申请的内容通过引用而全部结合于本文。
背景技术
小部分的射频(RF)频谱被分配给各通信载波。被分配的频谱因此必须被有效使用以便使最大数量的频率用户能够使用该频谱。多路存取调制技术已经被开发以提供RF频谱的最佳使用。这样的调制技术的示例包括时分多址(TDMA)、频分多址(FDMA)、和码分多址(CDMA)。
无线网络的性能存在着很大的差异。传统的无线蜂窝网络覆盖了较大的地理区域但是却提供了较低的带宽。这样的无线网络利用无线电频谱的规定部分并被许多用户所共享。由于蜂窝网络设备的大小和复杂度而使得无线网络的基础设施成本较高。
其他无线网络(如CDMA2000-EV-DO/DV网络)提供了更高的带宽和增强的数据服务(如网页浏览)。然而，这些网络也使许多的用户挤进较小范围的规定频谱。其他类型的无线电网络适合于用增加和更小的覆盖区域改进频谱效率。例如，IEEE 802.11x(或Wi-Fi)网络可利用直接序列扩频(DSSS)模式以多达11Mbps的速度传输或者利用正交频分多路复用(OFDM)模式以多达54Mbps的速度传输。
符合IEEE 802.11x(如IEEE 802.11b)网络的接入点可覆盖直径为几百英尺的区域。各个这样的接入点被连接至更大的网络(如因特网)。为了覆盖更大的地理区域，需要相对大量的IEEE 802.11x网络接入点和相对较多的有线回程网络。部分由于回程成本，由此产生的基于IEEE 802.11x的网络的建立和运行可能因此比基于类似的无线网络更昂贵。换句话说，许多折衷方案常常存在于与不同类型的无线网络相关联的覆盖区域、最大比特率和成本之间和当中。
对与具有完全漫游能力的移动通信装置相关联的高宽带和服务质量(QoS)的需求在增长。一种公知的通信装置包括适合于利用无线蜂窝网络进行通信的蜂窝通信模块以及适合于利用IP语音(VoIP)协议进行通信的Wi-Fi通信模块。在这样的装置中，为了使通信模式从蜂窝网络变至VoIP或者反过来，用户不得不通过按一个或多个键来人工改变装置的设置。
正在开发中的另外其他的公知通信装置中，为了使通信模式从比如蜂窝网络转换至VoIP，蜂窝网络首先检测移动通信装置的位置以确定移动通信装置是否在Wi-Fi区域内。如果检测到它是在Wi-Fi区域内，则蜂窝网络将转换信号发送至移动通信装置以使通信能够继续利用VoIP协议进行通信。然而，获得或保持许多移动通信装置的精确位置同时引出了富有挑战的任务。从而，在这样的系统中，呼叫从蜂窝网络转换至VoIP或者反过来的转换可导致呼叫丢失。
发明内容
依照本发明，移动通信装置被配置以便利用无线蜂窝网络(下文或称为蜂窝网络)将已在进行中的通信自动转换至无线IP语音网络(VoIP)或者反过来。移动通信装置适合于部分地包括蜂窝通信模块、适合于在移动通信模块与蜂窝网络之间收发数据的第一天线、无线保真(Wi-Fi)通信模块、适合于在Wi-Fi通信模块和VoIP网络之间收发数据的第二天线、信号监控电路以及适合于将现有的、正在进行中的通信在蜂窝通信模块与Wi-Fi通信模块之间转换的转换电路。第二天线和相关联电路被持续地维持在接通状态以监控和检测Wi-Fi信号。
如果移动通信装置经由其蜂窝通信模块并通过蜂窝网络正在进行(即预先建立)通信，并且Wi-Fi天线系统检测具有第一预定电平(强度)的Wi-Fi信号，位于移动通信装置内的定时器被激活以建立第一预定大小的第一时间窗口。如果在第一时间窗口期间所检测的Wi-Fi信号电平保持等于或大于第一预定电平，则在第一时间窗口期满时，转换电路导致进行中的通信将从其蜂窝通信模块转换至其Wi-Fi通信模块并通过VoIP网络，而不会丢失进行中的通信。
在某些实施例中，在激活定时器时，导致Wi-Fi通信模块改变状态，由在此期间Wi-Fi通信模块消耗相对少量功率的休眠模式改变到在此期间Wi-Fi通信模块消耗中间量的功率的待机模式。随后，在通信转换到Wi-Fi通信模块之前，导致Wi-Fi通信模块被置于完全活动模式，在此期间Wi-Fi通信模块消耗的功率量大于中间量的功率。
如果移动通信装置是处于经由其Wi-Fi通信模块并通过VoIP网络的预先建立的通信中，并且Wi-Fi天线系统检测到所接收的Wi-Fi信号电平低于第二预定值，则定时器被激活以建立第二预定大小的第二时间窗口。如果在第二时间窗口期间所检测的Wi-Fi信号电平等于或大于第三预定值，则经由Wi-Fi通信模块的预先建立的通信被维持无任何改变。如果在第二时间窗口期间所检测的Wi-Fi信号电平小于第三预定值，则定时器复位并被重新激活以建立第三大小的第三时间窗口。如果在第三时间窗口期间所检测的Wi-Fi信号电平小于第三预定值，则在第三时间窗口期满时，转换电路导致进行中的通信将从其Wi-Fi通信模块转换至其蜂窝通信模块并通过蜂窝网络，而不会丢失进行中的通信。
在某些实施例中，在激活定时器以建立第二时间窗口时，导致蜂窝通信模块改变状态，由在此期间蜂窝通信模块消耗相对少量的功率的休眠模式改变到在此期间蜂窝通信模块消耗中间量功率的待机模式。随后，在通信被转换至Wi-Fi通信模块之前，导致蜂窝通信模块被置于完全活动模式，在此期间蜂窝通信模块消耗的功率量大于中间量的功率。
在某些实施例中，Wi-Fi通信模块适合于利用802.11x无线协议同Wi-Fi局域网的接入点进行通信，并且蜂窝通信模块适合于利用GSM、CDMA或CDMA2000协议中的任何一种同无线蜂窝网络的基站进行通信。
附图说明
图1是依照本发明一个实施例的移动通信装置的简化高层框图。
图2示出了依照一个实施例用来确定通信是否从蜂窝通信模块转换至图1的通信装置的Wi-Fi通信模块的Wi-Fi信号阈值电平和定时窗口。
图3示出了依照一个实施例用来确定通信是否从Wi-Fi通信模块转换至图1的通信装置的蜂窝通信模块的Wi-Fi信号阈值电平和定时窗口。
具体实施方式
依照本发明，移动通信装置被配置以便使现有的通信从无线蜂窝网络(在下文中或称为蜂窝网络)自动转换至无线IP语音(VoIP)网络或者使现有的通信从VoIP网络转换至蜂窝网络。应当理解，如在比如IEEE 802.11x标准或其他等效标准中所定义的，无线保真(Wi-Fi)信号可用来与IP语音(VoIP)网络通信。移动通信装置适合于部分地包括蜂窝通信模块、适合于在移动通信模块和蜂窝网络之间收发数据的第一天线、Wi-Fi通信模块、适合于在Wi-Fi通信模块和VoIP网络之间收发数据的第二天线、信号监控电路以及适合于将现有的进行中的通信在蜂窝通信模块与Wi-Fi通信模块之间转换的转换电路。第二天线和相关联电路被持续地维持在接通状态以监控和检测Wi-Fi信号。
应当理解，无线蜂窝网络部分地包括许多基站。各个这样的基站适合于在移动通信装置位于基站的覆盖区域时经由蜂窝网络上承载的RF信号与移动通信装置进行通信。还应当理解，各个这样的覆盖区域由中心位于基站并具有比如几英里半径的区域所界定。还应当理解，Wi-Fi网络可部分地包括许多接入点。各个这样的接入点适合于在移动通信装置位于接入点的覆盖区域时经由VoIP分组与移动通信装置进行通信。还应当理解，移动通信装置还可包括适合于计算的块并因此成为通信/计算装置。
如果移动通信装置是处于经由其蜂窝通信模块并通过蜂窝网络的在进行中的(即预先建立的)通信中，并且Wi-Fi天线系统检测具有第一预定电平(强度)的Wi-Fi信号，位于移动通信装置内的定时器被激活以建立第一预定大小的第一时间窗口。如果在第一时间窗口期间所检测的Wi-Fi信号电平保持等于或大于第一预定电平，则在第一时间窗口期满时，转换电路导致在进行中的通信将从其蜂窝通信模块转换至其Wi-Fi通信模块并通过VoIP网络，而不会丢失进行中的通信。
在某些实施例中，在激活定时器时，导致Wi-Fi通信模块改变状态，由在此期间Wi-Fi通信模块消耗相对少量的功率的休眠模式改变到在此期间Wi-Fi通信模块消耗中间量功率的待机模式。随后，在通信被转换到Wi-Fi通信模块之前，导致Wi-Fi通信模块被置于完全活动模式，在此期间Wi-Fi通信模块消耗的功率量大于中间量的功率。
如果移动通信装置是处于经由其Wi-Fi通信模块并通过VoIP网络的预先建立的通信中，并且Wi-Fi天线系统检测到所接收的Wi-Fi信号电平低于第二预定值，则定时器被激活以建立第二预定大小的第二时间窗口。如果在第二时间窗口期间检测的Wi-Fi信号电平等于或大于第三预定值，则经由Wi-Fi通信模块的预先建立的通信被维持无任何改变。如果在第二时间窗口期间所检测的Wi-Fi信号电平小于第三预定值，则定时器复位并被重新激活以建立第三大小的第三时间窗口。如果在第三时间窗口期间所检测的Wi-Fi信号电平小于第三预定值，则在第三时间窗口期满时，转换电路导致进行中的通信将从其Wi-Fi通信模块转换至其蜂窝通信模块并通过蜂窝网络，而不会丢失进行中的通信。
在某些实施例中，在激活定时器以建立第二时间窗口时，导致蜂窝通信模块改变状态，由在此期间蜂窝通信模块消耗相对少量的功率的休眠模式改变到在此期间蜂窝通信模块消耗中间量功率的待机模式。随后，在通信被转换至Wi-Fi通信模块之前，导致蜂窝通信模块被置于完全活动模式，在此期间蜂窝通信模块消耗的功率量大于中间量的功率。
图1是依照本发明一个实施例的移动通信装置100的简化高层框图。适合于在蜂窝网络和VoIP网络之间自动转换通信的移动通信装置100被示出，其部分地包括耦合至蜂窝天线1的蜂窝通信模块(在下文中或称为蜂窝模块)3、耦合至Wi-Fi天线2的Wi-Fi通信模块(在下文中或称为Wi-Fi模块)4、音频/视频放大器5、网络转换部件6、定时器部件7、Wi-Fi信号电平监视器8、麦克风20、扬声器21和显示监视器22。移动通信装置100适合于经由蜂窝模块3通过无线网络(未示出)、和/或经由Wi-Fi模块4通过VoIP网络(未示出)建立和维持通信。蜂窝模块3还包括适合于向蜂窝网络发送信号以及从蜂窝网络接收信号的收发器30。Wi-Fi模块4还包括适合于向VoIP网络发送信号以及从VoIP网络接收信号的收发器32。取决于所检测到的由Wi-Fi接入点发射的Wi-Fi信号的电平，最初借助蜂窝模块3建立的呼叫可被转换以由Wi-Fi模块4处理，或者最初经由Wi-Fi模块4建立的呼叫可被转换以由蜂窝模块3处理。
假定移动通信装置100与蜂窝网络在进行通信并且正在进入适合于收发Wi-Fi信号的Wi-Fi接入点的覆盖区域。众所周知，Wi-Fi接入点可用来访问VoIP网络。Wi-Fi天线2连同Wi-Fi模块4和Wi-Fi信号监视器8持续地监控以检测Wi-Fi信号。如果所检测的Wi-Fi信号电平大于预定阈值Vth1，则Wi-Fi信号电平监视器8经由信号线10激活定时器7并且经由信号线12向网络转换部件6发送唤醒信号，从而使网络转换部件6改变状态，由在此期间网络转换部件消耗相对较少功率的休眠模式改变到在此期间网络转换部件蜂窝消耗中间量的功率的待机模式。网络转换部件6依次经由信号线15向蜂窝模块3供给唤醒转换信号并且经由信号线13向Wi-Fi模块4供给唤醒转换信号。这导致电话的蜂窝模块3和Wi-Fi模块4激活它们相应的转换模块。可通过比如抽取多个输入Wi-Fi信号的取样并计算这些取样的信号电平来确定所检测的Wi-Fi信号电平。在一个实施例中，取样信号的振幅/相位的平均可用来检测Wi-Fi信号电平。
如图2所示，如果所检测的Wi-Fi信号电平大于Vth1，则定时器部件7被激活以建立第一预定大小的第一时间窗口T1。在时间窗口T1期间，Wi-Fi天线2连同Wi-Fi模块4和Wi-Fi信号监视器8继续监控和检测所接收的Wi-Fi信号的电平。如果在时间窗口T1期间所检测的Wi-Fi信号电平保持等于或大于Vth1，则在时间窗口T1期满时，定时器部件7经由信号线11向网络转换部件6发送蜂窝拆卸信号和Wi-Fi链接信号。作为响应，网络转换部件6经由信号线15向蜂窝模块3发送拆卸信号并且经由信号线13向Wi-Fi模块4发送链接信号。网络转换部件6还经由信号线14指示音频/视频放大器5生成音频/视频报警信号。所生成的音频报警信号随后经由信号线18由扬声器21重放，并且所生成的视频报警信号随后经由信号线23由显示监视器22重放。音频/视频报警音调适合于通知移动通信装置用户由蜂窝至Wi-Fi进行网络转换。
在接收到拆卸信号之后，蜂窝模块3适合于终止到蜂窝网络的连接并且适合于切断到音频/视频放大器5的连接。在接收到Wi-Fi链接信号之后，Wi-Fi模块4适合于激活到VoIP网络的连接并且适合于接通到音频/视频放大器5的连接--用于将语音信号传至音频放大器5以及将视频信号传至显示监视器22。先前所建立的通信链路因此经由VoIP网络而持续不间断并通过扬声器21、麦克风20和显示监视器23。
假定移动通信装置100与VoIP网络通信并且可能正在离开Wi-Fi接入点的覆盖区域。Wi-Fi天线2连同Wi-Fi模块4和Wi-Fi信号监视器8持续监控以检测Wi-Fi信号。如果所检测的Wi-Fi信号电平低于第二预定阈值Vth2，则Wi-Fi信号电平监视器8激活定时器7并向网络转换部件6发送唤醒信号以使网络转换部件6的状态从休眠模式改变至待机模式。网络转换部件6依次向蜂窝模块3和Wi-Fi模块4供给唤醒转换信号以使这些模块能够激活它们相应的转换过程。
如图3所示，一旦被激活，定时器部件7就建立第二预定大小的第二时间窗口T2。在时间窗口T2期间，Wi-Fi天线2连同Wi-Fi模块4和Wi-Fi信号监视器8继续监控和检测所接收的Wi-Fi信号的电平。如果在时间窗口T2期间所检测的Wi-Fi信号电平等于或大于第三预定阈值Vth3，其中Vth3小于Vth2，则先前所建立的VoIP通信继续而无需转换。
如果在时间窗口T2期间检测的Wi-Fi信号电平小于Vth3，则在时间窗口T2期满时，定时器部件7被复位并激活以建立第三预定大小的第三时间窗口T3，其中T3小于T2。如果在时间窗口T3期间检测的Wi-Fi信号电平等于或大于Vth3，则先前所建立的VoIP通信继续而无需转换。
如果在时间窗口T3期间检测的Wi-Fi信号电平小于Vth3，则在时间窗口T3期满时，定时器部件7向网络转换部件6发送Wi-Fi拆卸信号和蜂窝链接信号。作为响应，网络转换部件6向Wi-Fi模块3发送拆卸信号，并且向蜂窝模块4发送链接信号。网络转换部件6还指示音频/视频放大器5生成音频/视频报警信号。所生成的音频报警信号随后由扬声器21重放，并且所生成的视频报警信号随后由显示监视器22重放。音频/视频报警音调适合于通知移动通信装置用户由Wi-Fi至蜂窝进行网络转换。
在接收到拆卸信号之后，Wi-Fi模块4适合于终止到VoIP网络的连接并且适合于切断到音频/视频放大器5的连接。在接收到Wi-Fi链接信号之后，蜂窝模块4适合于激活到蜂窝网络的连接并且适合于接通到音频/视频放大器5的连接。先前所建立的通信链路因此持续不间断并通过扬声器21、麦克风20和显示监视器23。
依照某些实施例，如果在建立通信链路之前移动通信装置检测到来自接入点的Wi-Fi信号和来自移动蜂窝基站的蜂窝信号，则移动通信装置首先试图利用Wi-Fi模块4来建立与Wi-Fi接入点的通信。
本发明的上述实施例是说明性的而非限制性的。各种替换和等效物都是可能的。可以理解，与上述任何块相关联的功能性可以是集中的或分布的，或为本地的或为远程的。还可以理解，各移动通信装置的一个或多个块可通过硬件、固件或软件或其中的某些组合来完成。本发明不受承载通信的蜂窝网络类型(如CDMA、GSM或其它方式)的限制。本发明也不受VoIP网络的限制。本发明不受用来承载VoIP通信的Wi-Fi信号(如由IEEE 802.11x定义的那些，其中x可以是a、b、g)或WiMAX的限制。本发明不受其中可布置本发明的集成电路类型的限制。本发明也不受限于可用来制造本发明的任何特定类型的处理技术(如CMOS、双极型、或BICMOS)。鉴于本发明，其他增加、减少或修改是显而易见的因而被认为是涵盖在所附权利要求的范围内。

Claims (16)

1.一种移动通信装置，包括：
蜂窝通信模块，适合于同无线蜂窝网络进行通信；
Wi-Fi通信模块，适合于同与利用VoIP协议的Wi-Fi网络相关联的接入点进行通信；以及
转换电路，适合于在所述蜂窝通信模块和所述Wi-Fi通信模块之间自动转换操作。
2.如权利要求1所述的移动通信装置，其中所述无线蜂窝网络从包含GSM、CDMA和CDMA2000无线蜂窝网络的组中选择。
3.如权利要求2所述的移动通信装置，其中所述Wi-Fi网络从包含IEEE 802.11x、Wi-Fi和WiMAX网络的组中选择。
4.如权利要求3所述的移动通信装置，还包括：
定时器；以及
Wi-Fi信号监视器；其中如果所述Wi-Fi信号监视器检测到第一Wi-Fi信号电平大于第一预定阈值Vth1，则所述定时器被激活以建立第一预定大小的第一时间窗口T1，其中如果在T1期间，所述Wi-Fi信号监视器检测到第二Wi-Fi信号电平等于或大于Vth1，则在所述第一时间窗口期满时，所述转换电路向所述蜂窝通信模块发送拆卸信号并向所述Wi-Fi通信模块发送链接信号，其中所述拆卸信号导致所述蜂窝通信模块中断处理先前建立的蜂窝通信，并且其中所述链接信号导致所述Wi-Fi通信模块经由VoIP网络处理所述先前建立的蜂窝通信。
5.如权利要求4所述的移动通信装置，其中所述拆卸信号导致所述蜂窝通信模块进入休眠模式。
6.如权利要求4所述的移动通信装置，其中在所述定时器激活时，所述网络转换电路导致所述Wi-Fi通信模块的状态从休眠模式改变到活动模式。
7.如权利要求4所述的移动通信装置，其中所述第一和第二Wi-Fi信号电平各由所接收的Wi-Fi信号的相应的多个取样来限定。
8.如权利要求4所述的移动通信装置，其中如果所述Wi-Fi信号监视器检测到所述Wi-Fi信号电平低于第二预定阈值Vth2，则所述定时器被激活以建立第二预定大小的第二时间窗口T2，其中如果在时间窗口T2期间，所述Wi-Fi信号监视器检测到Wi-Fi信号电平等于或大于第三预定阈值Vth3，则先前所建立的VoIP通信继续而无需转换，其中Vth3小于Vth2。
9.如权利要求8所述的移动通信装置，其中如果在时间窗口T2期间，所述Wi-Fi信号监视器检测到所述Wi-Fi信号电平小于Vth3，则在时间窗口T2期满时，所述定时器部件被激活以建立第三预定大小的第三时间窗口T3，其中T3小于T2，其中如果在时间窗口T3期间，所述Wi-Fi信号监视器检测到所述Wi-Fi信号电平小于Vth3，则所述转换电路向所述Wi-Fi通信模块发送拆卸信号并向所述蜂窝通信模块发送链接信号，其中所述拆卸信号导致所述Wi-Fi通信模块中断处理先前建立的VoIP通信，并且其中所述链接信号导致所述蜂窝通信模块经由蜂窝网络处理所述先前建立的VoIP通信。
10.如权利要求9所述的移动通信装置，其中在预定时段T2期满时，所述网络转换电路导致所述蜂窝通信模块的状态从休眠模式改变到活动模式。
11.一种方法，包括以下步骤：
检测第一Wi-Fi信号电平；
如果所检测的第一Wi-Fi信号电平大于第一预定阈值Vth1，则建立第一预定大小的第一时间窗口T1；
在所述第一时间窗口期间检测第二Wi-Fi信号电平；
如果所检测到的第二Wi-Fi信号电平大于Vth1，则将经由蜂窝无线网络的进行中的通信自动转换至经由VoIP网络的通信。
12.如权利要求11所述方法，其中所述无线蜂窝网络从包含GSM、CDMA和CDMA2000无线蜂窝网络的组中选择。
13.如权利要求11所述方法，其中所述VoIP网络与从包含IEEE802.11x、Wi-Fi和WiMAX网络的组中选择的网络进行通信。
14.如权利要求11所述方法，其中所述第一和第二Wi-Fi信号电平各由所接收的Wi-Fi信号的相应的多个取样来限定。
15.如权利要求11所述方法，还包括以下步骤：
检测第三Wi-Fi信号电平；
如果所检测到的第三Wi-Fi信号电平低于第二预定阈值Vth2，则建立第二预定大小的第二时间窗口T2；
在所述第二时间窗口期间检测第四Wi-Fi信号电平；
如果所检测到的第四Wi-Fi信号电平等于或大于第三预定阈值Vth3，其中Vth3小于Vth2，则继续VoIP通信而无需改变。
16.如权利要求15所述方法，还包括以下步骤：
如果所检测到的第四Wi-Fi信号电平小于Vth3，则建立第三预定大小的第三时间窗口T3；
在所述第三时间窗口期间检测第五Wi-Fi信号电平；
如果所检测到的第五Wi-Fi信号电平小于Vth3，则将经由VoIP无线网络的进行中的通信自动转换至经由蜂窝网络的通信。
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US20150327147A1 (en) 2015-11-12
WO2005067635A2 (en) 2005-07-28
US10368281B2 (en) 2019-07-30
US20110255416A1 (en) 2011-10-20
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US20170208522A1 (en) 2017-07-20
EP1738538B1 (en) 2018-08-08
US9125128B2 (en) 2015-09-01
EP1738538A4 (en) 2011-07-06
WO2005067635A3 (en) 2006-12-07
CN100544518C (zh) 2009-09-23
US9648538B2 (en) 2017-05-09
US20050147049A1 (en) 2005-07-07

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