US20020049073A1 - Call re-establishment for a dual mode telephone - Google Patents
Call re-establishment for a dual mode telephone Download PDFInfo
- Publication number
- US20020049073A1 US20020049073A1 US09/467,591 US46759199A US2002049073A1 US 20020049073 A1 US20020049073 A1 US 20020049073A1 US 46759199 A US46759199 A US 46759199A US 2002049073 A1 US2002049073 A1 US 2002049073A1
- Authority
- US
- United States
- Prior art keywords
- base station
- call
- cordless
- wireless communication
- communication device
- 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.)
- Granted
Links
- 230000009977 dual effect Effects 0.000 title description 23
- 238000004891 communication Methods 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims description 13
- 230000004044 response Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 description 58
- 238000010586 diagram Methods 0.000 description 6
- 230000011664 signaling Effects 0.000 description 6
- 230000000881 depressing effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003915 cell function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
Definitions
- the present invention is directed to a dual mode cellular and cordless telephone and method for semi-automatic hand-over of calls between the two modes, and more particularly, to a dual mode telephone and method where dropped calls are re-established by the telephone without data from base stations or networks.
- Wireless systems include PCS (Personal Communication System) or cellular and cordless systems.
- PCS/Cellular systems are AMPS (Advanced Mobile Phone Service), GSM (Global System for Communications), TDMA (Time Domain Multiple Access), CDMA (Code Division Multiple Access).
- cordless systems are DECT (Digital European Cordless Telephone System), FM (Frequency Modulation), spread spectrum, and the Bluetooth telephony profile. All systems comprise a handset and a base station. However PCS/cellular systems are nationwide, where the base stations serve many calls at the same time, and the distance between the handset and base station can be several miles. By contrast, cordless systems cover shorter distances and are typically for indoor use, such as in a home or office. Cordless base stations can support more than one handset, but the range is typically less than 1000 feet.
- the object of the present invention is to provide a dual mode handset that eliminates the problems of conventional dual mode handsets.
- the present invention accomplishes the above and other objects by providing a wireless communication device for establishing communication with a remote terminal device through a cordless or a mobile base station.
- the wireless communication device has a cordless section and a mobile section.
- the cordless section is for communicating with a remote terminal device through the cordless base station in a cordless mode used for a cordless call.
- the mobile section is for communicating with the remote terminal device through the mobile base station in a mobile mode used for a mobile call.
- a processor of the wireless communication device detects a drop of a current call using the cordless service, for example, and re-establishes the communication using the mobile service. The user may be prompted prior to call re-establishment. For outgoing calls, the last dialed number is stored and re-dialed for call re-establishment. For incoming calls, the caller ID is used for call re-establishment. When a cheaper service is detected during a call, the user is prompted and invited to use the cheaper service.
- FIG. 1 shows a wireless communication system with a dual mode handset according to present invention
- FIG. 2 shows a dual mode handset according to present invention
- FIG. 3 shows a signaling diagram for managing dropped calls on an outgoing call according to present invention
- FIG. 4 shows a signaling diagram for managing dropped calls on an incoming call according to present invention.
- FIG. 5 shows a signaling diagram for user initiated change of service according to present invention.
- FIG. 1 shows a wireless communication system 100 with a wireless or mobile dual mode handset 110 having a PCS or cellular mode for connection to a PCS/Cellular system and a cordless mode for connection to a cordless system.
- the PCS/Cellular systems may be AMPS, GSM, TDMA, or CDMA
- the cordless system may be DECT, FM, spread spectrum, or the Bluetooth telephony profile.
- the mobile and cordless modes or services are for illustrative purposes. It is understood by those skilled in the art that the handset 110 and communication system 100 can include any two modes or services.
- the dual mode handset 110 is connectable to a remote telephone 120 through a cellular network 130 , which includes at least one cellular base station, and a public switched telephone network (PSTN) 140 .
- a cellular wireless link L 1 connects the dual mode handset 110 to the cellular network 130 through an air interface
- a wired link L 2 connects the cellular network 130 to a PSTN 140 .
- the dual mode handset 110 is connectable to the remote telephone 120 through a cordless network 150 , which includes at least one cordless base station, and the PSTN 140 .
- a cordless wireless link L 3 connects the dual mode handset 110 to the cordless network 150 through the air interface
- a wired link L 4 connects the cordless network 150 to the PSTN 140 .
- the mobile handset 110 illustrated in FIG. 2 includes interconnected elements, such as a baseband section 210 , a cordless RF (radio frequency) section 215 , a cellular RF section 220 and a user interface 225 .
- each RF section 215 , 220 includes a transmitter and a receiver coupled to a respective antenna 230 , 235 through a duplexer.
- the transmitter transmits signals provided from the baseband section 210 as follows.
- the baseband section 210 includes an encoder which provides digital signals to a D/A (digital to analogue) for conversion to analogue signals.
- the analogue signals are modulated by a modulator of the transmitter using an RF carrier signal from a voltage-controlled oscillator or a frequency synthesizer controlled by a microprocessor 245 of the baseband section 210 .
- the modulated signals are amplified by a power amplifier of the transmitter and transmitted through the antenna.
- the receiver includes a low noise amplifier (LNA) which receives modulated signals from the antenna.
- a demodulator demodulates the received signals using a proper RF carrier signal from the voltage-controlled oscillator or the frequency synthesizer.
- the demodulated signals are digitized by an A/D (analogue to digital) converter to provide digital baseband signals to a decoder of the baseband unit 210 .
- A/D analogue to digital
- DSP digital signal processor
- the baseband section 210 also includes a non-volatile memory or ROM (read only memory) 250 , at least a portion of which is programmable.
- the ROM 250 stores firmware constituting programs and data for operation of the DSP 240 and the microprocessor 245 , e.g., for steering the setup of a cellular or PCS/Cellular call, re-establishment of a dropped call, and for other operations of the mobile handset.
- the baseband section 210 also includes a volatile memory or random access memory (RAM) 255 , for temporary storage in conjunction with program execution.
- RAM random access memory
- the user interface 225 includes a microphone 260 , speaker 265 , a numeric keypad 270 , and a driver 275 for a display 280 , e.g. a liquid crystal display (LCD) screen.
- a display 280 e.g. a liquid crystal display (LCD) screen.
- Each RF section 215 , 220 further includes an RSSI function unit 285 , 287 to detect received RSSI (Received Signal Strength Indicator) signals that indicate the strength of the received RF signals. Detection of the RSSI signals by the cordless and cellular RSSI units 285 , 287 indicates availability of the corresponding cordless and cellular services.
- RSSI Received Signal Strength Indicator
- the microprocessor 245 uses the RSSI signal to determine the presence or absence of signals received from base stations. If a signal received from a base station is detected, then the microprocessor 245 communicates with that base station using control signals. Illustratively, for an incoming call, the base station sends a command to the handset to ring. When the user answers, the handset sends a command to the base station to start the call. For an outgoing call, the handset sends a command to the base station to dial. The base station sends a command back to the handset with a dialing tone for inputting the phone number to be dialed.
- Similar control signals between the handset and base station continue during a call, such as control signals to increase or decrease the RF transmit power. Each command results in an acknowledgment response.
- a dropped call takes place and is detected when a command is not acknowledged within a predetermined time, e.g., 2 seconds. Thus, communication inability between the handset and base station indicates a dropped call. Further, availability of a service is detected when the RSSI level indicates a signal and when some commands and responses have been exchanged to verify the service availability.
- the mobile handset 110 is capable of receiving the telephone number of a caller, commonly referred to as the caller ID, as is well known in the art. Further, the mobile handset 110 is capable of switching between PCS/cellular and cordless modes to be able to use the least costly available service and to roam over large distances. This is achieved by semi-automatic or user initiated handover between PCS/cellular and cordless systems. In particular, the mobile handset 110 includes three features, namely, managing dropped calls on an outgoing call, managing dropped calls on an incoming call, and user initiated hand-over.
- FIG. 3 is an exemplary signalling diagram showing a sequence of events t 1 -t 4 for managing dropped outgoing calls.
- the current outgoing call at time t 1 is shown in FIG. 3 to be a cordless call, however it is understood that the current call in FIGS. 3 - 5 may be either a cordless call or a cellular call and the dual mode mobile phone is switchable between the cordless and cellular modes.
- a cordless call is established and in progress by the dual mode handset 110 , through a cordless first link L 5 between the handset 110 and the cordless base station 150 , a second link L 6 between the cordless base station 150 and the PSTN 140 , and a third link L 7 between the PSTN 140 and the remote telephone 120 .
- the user of the dual mode handset 110 experiences a dropped call resulting from failure of the cordless first link L 5 , for example, due to moving out of range of the cordless base station 150 .
- the line goes dead and the call recipient at the remote telephone 120 hangs up.
- the handset 110 recognizes that the call failure is due to a failure of the cordless first link L 5 between the handset 110 and the cordless base-station 150 .
- the link L 5 failure is be detected by the microprocessor 245 (FIG. 2) when the handset 110 can no longer communicate with the base station for exchanging control or other signals.
- the handset 110 In response to the detection of the failed link L 5 , the handset 110 automatically redials the last dialed number using the alternative network, which is the PCS/cellular network 130 when the dropped call is a cordless call.
- the last dialed number is stored in the temporary memory RAM 255 of the handset 110 shown in FIG. 2.
- the automatic redialing occurs without user intervention if desired.
- the user may be prompted and asked if the call should be re-established by a visual message displayed on the screen 280 (FIG. 2) and/or an audio tone or a voice message provided through the speaker 265 .
- the call is re-established in response to a positive response from a user, such as depressing a single key on the keypad 170 .
- a cellular call is in progress. The call re-establishment is very fast and takes place within a few seconds.
- the microprocessor 245 of the dual mode mobile handset 110 may be pre-programmed so that the cheapest service (e.g., cordless or cellular) is the default mode.
- This programming could be a factory setting or set by the user.
- the default mode can be changed by the user. So when making a call and both the cellular and cordless services are available, e.g., as indicated by the RSSI levels received from both the cellular and cordless base stations 130 , 150 , the cheapest service is automatically chosen when a telephone number is dialed.
- the user may override the default selection prior to dialing a number. For example, if the caller is leaving the coverage area of the cordless base station 150 , e.g., the place of residence or business, the caller knows that the cordless service will not be available for long. Therefore, the user can force the handset not to dial using the default/cheaper cordless service, but to dial using the cellular service and place a cellular call.
- FIG. 4 is an exemplary signaling diagram showing a sequence of events t′ 1 -t′ 4 for managing dropped incoming calls.
- the current incoming call at time t′ 1 is a cordless call received by the handset 110 from the cordless base station 150 through a cordless first link L′ 5 , after a call is made on the remote telephone 120 and received by the cordless base station 150 through the PSTN 140 .
- the handset may be configured for automatic re-dialing to re-establish the call using data from the caller ID which is stored in the handset memory, such as in the RAM 255 .
- the handset 110 prompts the user for call re-establishment and dials the caller ID in response to a positive response from the user.
- the user of the dual mode handset 110 experiences a dropped call resulting from failure of the cordless first link L′ 5 , for example, due to moving out of range of the cordless base station 150 .
- the line goes dead and the remote caller at the remote telephone 120 hangs up.
- the handset 110 recognizes that the call failure is due to a failure of the cordless first link L′ 5 between the handset 110 and the cordless base-station 150 .
- the link L′ 5 failure is detected by the loss of communication between the handset and the corresponding base station, as previously described.
- the handset 110 In response to the detection of the failed link L′ 5 , the handset 110 automatically redials the telephone number included in the caller ID using the alternative network, which is the PCS/cellular network 130 when the dropped call is a cordless call.
- the automatically redials occurs without user intervention if desired.
- the user may be prompted and asked if the call should be re-established using a video and/or an audio message as previously described.
- the call is re-established in response to a positive response from the user, such as depressing the single key on the keypad 170 (FIG. 2).
- a cellular call is in progress.
- the call re-establishment is very fast and takes place within a few seconds. If caller ID is not available, the user is prompted to enter the number to call back and re-establish the dropped call.
- the dropped call is an incoming call
- the cost of the call moves from the originator at the remote telephone 120 to the user of the dual mode handset 110 . Therefore, even if caller ID is available, it is preferable that the user be prompted prior for automatic re-dial, e.g., by displaying on the screen 280 (FIG. 2) an appropriate message such as ‘Re-establish call? Yes/No’.
- FIG. 5 is an exemplary signaling diagram showing a sequence of events tt 1 to tt 4 for user initiated handover of calls from a cellular system to a cordless system.
- the handset e.g., its microprocessor
- the handset may also be programmed for user initiated handover of calls from a cordless system to a cellular system.
- an outgoing cellular call is in progress initiated by the handset 110 .
- FIG. 5 is directed to an outgoing cellular call, the following description is equally applicable for an incoming cellular call, as well as for an incoming call, whether cellular or cordless.
- the cellular call is connected to the remote telephone 120 through a first cellular link L 8 between the handset 110 and the cellular base station 130 , a second cellular link L 9 between the cellular base station 130 and the PSTN, and another link L 10 between the PSTN and the remote telephone 120 .
- the microprocessor 245 (FIG. 2) of the handset 110 detects that the alternate service becomes available, e.g., the cheaper cordless service, such as when the handset 110 is within range of the cordless base station 150 .
- the handset 110 invites the user to hand-over the call to the cheaper service using a video and/or audio message as previously described.
- the user warns the remote party verbally that the current call will be dropped and re-established, and accepts the invitation, for example, by depressing a single key on the keypad 270 (FIG. 2).
- the handset 110 hangs up and drops the current cellular call, and automatically redials using the cellular system.
- the remote telephone 120 rings and is answered by the remote user. This establishes a cellular call between the handset 110 and the remote telephone 120 .
- a cordless call is in progress.
- the above described features of the dual mode mobile handset provide convenience and value to the user to automatically perform actions quickly that otherwise would have been performed manually requiring longer periods of time for call re-establishment. Further, battery life (before requiring a charge) of the dual mode mobile handset is extended since there is no need for extended simultaneous operation of both the cellular and cordless modes, as well as no need for power consuming signal strength evaluations.
- the dual mode handset re-establishes dropped calls quickly and without requiring any input data or from the cordless or cellular base stations.
- the dropped call is re-established without any data about the dropped call stored in the base stations. For example, there is no need for the base stations to store the links of the current call in case it is dropped. Further, there is no need to monitor the strength of signals for call hand-over. Instead of call hand-over, the call is re-established when it is dropped.
Abstract
Description
- 1. Field of the Invention
- The present invention is directed to a dual mode cellular and cordless telephone and method for semi-automatic hand-over of calls between the two modes, and more particularly, to a dual mode telephone and method where dropped calls are re-established by the telephone without data from base stations or networks.
- 2. Discussion of the Prior Art
- Wireless systems include PCS (Personal Communication System) or cellular and cordless systems. Examples of PCS/Cellular systems are AMPS (Advanced Mobile Phone Service), GSM (Global System for Communications), TDMA (Time Domain Multiple Access), CDMA (Code Division Multiple Access). Examples of cordless systems are DECT (Digital European Cordless Telephone System), FM (Frequency Modulation), spread spectrum, and the Bluetooth telephony profile. All systems comprise a handset and a base station. However PCS/cellular systems are nationwide, where the base stations serve many calls at the same time, and the distance between the handset and base station can be several miles. By contrast, cordless systems cover shorter distances and are typically for indoor use, such as in a home or office. Cordless base stations can support more than one handset, but the range is typically less than 1000 feet.
- Both PCS/cellular and cordless systems are in widespread use and both are convenient. There are some handsets that support both cordless and PCS/cellular functions, but they are expensive. Bluetooth is a new technology that permits short-range wireless voice and data links between devices. One such application is cordless. Thus, a PCS/cellular handset could add cordless functionality at a low cost using Bluetooth. Accordingly, the number of dual mode cordless and PCS/cellular handsets could increase significantly.
- There is a need to roam between cordless and PCS/cellular systems. In dual mode systems, communication is necessary between a cordless base station and a PCS/cellular network to facilitate hand-over of calls between the two different systems. However, conventional systems and methods for call hand-over are expensive and difficult to implement since, for example, strength of signals between handsets and base stations are monitored and communication paths of current calls are stored by the network or base stations for hand-over of calls or re-establishment of calls in case of a dropped call. Accordingly, there is a need to provide a cost effective system and method for call hand-over between two different systems.
- The object of the present invention is to provide a dual mode handset that eliminates the problems of conventional dual mode handsets.
- The present invention accomplishes the above and other objects by providing a wireless communication device for establishing communication with a remote terminal device through a cordless or a mobile base station. The wireless communication device has a cordless section and a mobile section. The cordless section is for communicating with a remote terminal device through the cordless base station in a cordless mode used for a cordless call. The mobile section is for communicating with the remote terminal device through the mobile base station in a mobile mode used for a mobile call.
- A processor of the wireless communication device detects a drop of a current call using the cordless service, for example, and re-establishes the communication using the mobile service. The user may be prompted prior to call re-establishment. For outgoing calls, the last dialed number is stored and re-dialed for call re-establishment. For incoming calls, the caller ID is used for call re-establishment. When a cheaper service is detected during a call, the user is prompted and invited to use the cheaper service.
- Further features and advantages of the invention will become more readily apparent from a consideration of the following detailed description set forth with reference to the accompanying drawings, which specify and show preferred embodiments of the invention, wherein like elements are designated by identical references throughout the drawings; and in which:
- FIG. 1 shows a wireless communication system with a dual mode handset according to present invention;
- FIG. 2 shows a dual mode handset according to present invention;
- FIG. 3 shows a signaling diagram for managing dropped calls on an outgoing call according to present invention;
- FIG. 4 shows a signaling diagram for managing dropped calls on an incoming call according to present invention; and
- FIG. 5 shows a signaling diagram for user initiated change of service according to present invention.
- FIG. 1 shows a
wireless communication system 100 with a wireless or mobiledual mode handset 110 having a PCS or cellular mode for connection to a PCS/Cellular system and a cordless mode for connection to a cordless system. Illustratively, the PCS/Cellular systems may be AMPS, GSM, TDMA, or CDMA, and the cordless system may be DECT, FM, spread spectrum, or the Bluetooth telephony profile. The mobile and cordless modes or services are for illustrative purposes. It is understood by those skilled in the art that thehandset 110 andcommunication system 100 can include any two modes or services. - In the cellular mode, the
dual mode handset 110 is connectable to aremote telephone 120 through acellular network 130, which includes at least one cellular base station, and a public switched telephone network (PSTN) 140. A cellular wireless link L1 connects thedual mode handset 110 to thecellular network 130 through an air interface, and a wired link L2 connects thecellular network 130 to aPSTN 140. In the cordless mode, thedual mode handset 110 is connectable to theremote telephone 120 through acordless network 150, which includes at least one cordless base station, and the PSTN 140. A cordless wireless link L3 connects thedual mode handset 110 to thecordless network 150 through the air interface, and a wired link L4 connects thecordless network 150 to thePSTN 140. - The
mobile handset 110 illustrated in FIG. 2 includes interconnected elements, such as abaseband section 210, a cordless RF (radio frequency)section 215, a cellular RF section 220 and auser interface 225. As is well known in the art, eachRF section 215, 220 includes a transmitter and a receiver coupled to arespective antenna baseband section 210 as follows. Thebaseband section 210 includes an encoder which provides digital signals to a D/A (digital to analogue) for conversion to analogue signals. The analogue signals are modulated by a modulator of the transmitter using an RF carrier signal from a voltage-controlled oscillator or a frequency synthesizer controlled by amicroprocessor 245 of thebaseband section 210. The modulated signals are amplified by a power amplifier of the transmitter and transmitted through the antenna. - The receiver includes a low noise amplifier (LNA) which receives modulated signals from the antenna. A demodulator demodulates the received signals using a proper RF carrier signal from the voltage-controlled oscillator or the frequency synthesizer. The demodulated signals are digitized by an A/D (analogue to digital) converter to provide digital baseband signals to a decoder of the
baseband unit 210. Generally, at least the encoder and decoder are implemented by a digital signal processor (DSP) 240. - In addition to the DSP240 and
microprocessor 245, thebaseband section 210 also includes a non-volatile memory or ROM (read only memory) 250, at least a portion of which is programmable. TheROM 250 stores firmware constituting programs and data for operation of the DSP 240 and themicroprocessor 245, e.g., for steering the setup of a cellular or PCS/Cellular call, re-establishment of a dropped call, and for other operations of the mobile handset. Thebaseband section 210 also includes a volatile memory or random access memory (RAM) 255, for temporary storage in conjunction with program execution. - The
user interface 225 includes amicrophone 260,speaker 265, anumeric keypad 270, and adriver 275 for adisplay 280, e.g. a liquid crystal display (LCD) screen. - Each
RF section 215, 220 further includes anRSSI function unit cellular RSSI units - The
microprocessor 245 uses the RSSI signal to determine the presence or absence of signals received from base stations. If a signal received from a base station is detected, then themicroprocessor 245 communicates with that base station using control signals. Illustratively, for an incoming call, the base station sends a command to the handset to ring. When the user answers, the handset sends a command to the base station to start the call. For an outgoing call, the handset sends a command to the base station to dial. The base station sends a command back to the handset with a dialing tone for inputting the phone number to be dialed. - Similar control signals between the handset and base station continue during a call, such as control signals to increase or decrease the RF transmit power. Each command results in an acknowledgment response. A dropped call takes place and is detected when a command is not acknowledged within a predetermined time, e.g., 2 seconds. Thus, communication inability between the handset and base station indicates a dropped call. Further, availability of a service is detected when the RSSI level indicates a signal and when some commands and responses have been exchanged to verify the service availability.
- The
mobile handset 110 is capable of receiving the telephone number of a caller, commonly referred to as the caller ID, as is well known in the art. Further, themobile handset 110 is capable of switching between PCS/cellular and cordless modes to be able to use the least costly available service and to roam over large distances. This is achieved by semi-automatic or user initiated handover between PCS/cellular and cordless systems. In particular, themobile handset 110 includes three features, namely, managing dropped calls on an outgoing call, managing dropped calls on an incoming call, and user initiated hand-over. - Managing Dropped Calls on an Outgoing Call
- FIG. 3 is an exemplary signalling diagram showing a sequence of events t1-t4 for managing dropped outgoing calls. The current outgoing call at time t1 is shown in FIG. 3 to be a cordless call, however it is understood that the current call in FIGS. 3-5 may be either a cordless call or a cellular call and the dual mode mobile phone is switchable between the cordless and cellular modes.
- For outgoing calls in progress, if the current service fails (dropped call) and the other service is available, e.g. by detecting signals with the
RSSI units - As shown in FIG. 3, at time t1, a cordless call is established and in progress by the
dual mode handset 110, through a cordless first link L5 between thehandset 110 and thecordless base station 150, a second link L6 between thecordless base station 150 and thePSTN 140, and a third link L7 between thePSTN 140 and theremote telephone 120. - At time t2, the user of the
dual mode handset 110 experiences a dropped call resulting from failure of the cordless first link L5, for example, due to moving out of range of thecordless base station 150. At this time t2, the line goes dead and the call recipient at theremote telephone 120 hangs up. - At time t3, the
handset 110 recognizes that the call failure is due to a failure of the cordless first link L5 between thehandset 110 and the cordless base-station 150. For example, the link L5 failure is be detected by the microprocessor 245 (FIG. 2) when thehandset 110 can no longer communicate with the base station for exchanging control or other signals. - In response to the detection of the failed link L5, the
handset 110 automatically redials the last dialed number using the alternative network, which is the PCS/cellular network 130 when the dropped call is a cordless call. Illustratively, the last dialed number is stored in thetemporary memory RAM 255 of thehandset 110 shown in FIG. 2. The automatic redialing occurs without user intervention if desired. Alternatively, the user may be prompted and asked if the call should be re-established by a visual message displayed on the screen 280 (FIG. 2) and/or an audio tone or a voice message provided through thespeaker 265. The call is re-established in response to a positive response from a user, such as depressing a single key on the keypad 170. At time t4, a cellular call is in progress. The call re-establishment is very fast and takes place within a few seconds. - The
microprocessor 245 of the dual modemobile handset 110 may be pre-programmed so that the cheapest service (e.g., cordless or cellular) is the default mode. This programming could be a factory setting or set by the user. Thus, the default mode can be changed by the user. So when making a call and both the cellular and cordless services are available, e.g., as indicated by the RSSI levels received from both the cellular andcordless base stations - Further, if both the cellular and cordless services are available, the user may override the default selection prior to dialing a number. For example, if the caller is leaving the coverage area of the
cordless base station 150, e.g., the place of residence or business, the caller knows that the cordless service will not be available for long. Therefore, the user can force the handset not to dial using the default/cheaper cordless service, but to dial using the cellular service and place a cellular call. - Managing Dropped Calls on an Incoming Call
- FIG. 4 is an exemplary signaling diagram showing a sequence of events t′1-t′4 for managing dropped incoming calls. For example, the current incoming call at time t′1 is a cordless call received by the
handset 110 from thecordless base station 150 through a cordless first link L′5, after a call is made on theremote telephone 120 and received by thecordless base station 150 through thePSTN 140. If the current service, e.g., cordless service, fails (dropped call) and the other service, e.g., PCS/cellular service, is available, the handset may be configured for automatic re-dialing to re-establish the call using data from the caller ID which is stored in the handset memory, such as in theRAM 255. Alternatively, thehandset 110 prompts the user for call re-establishment and dials the caller ID in response to a positive response from the user. - In particular, at time t′2, the user of the
dual mode handset 110 experiences a dropped call resulting from failure of the cordless first link L′5, for example, due to moving out of range of thecordless base station 150. At this time t′2, the line goes dead and the remote caller at theremote telephone 120 hangs up. - At time t′3, the
handset 110 recognizes that the call failure is due to a failure of the cordless first link L′5 between thehandset 110 and the cordless base-station 150. For example, the link L′5 failure is detected by the loss of communication between the handset and the corresponding base station, as previously described. - In response to the detection of the failed link L′5, the
handset 110 automatically redials the telephone number included in the caller ID using the alternative network, which is the PCS/cellular network 130 when the dropped call is a cordless call. The automatically redials occurs without user intervention if desired. Alternatively, the user may be prompted and asked if the call should be re-established using a video and/or an audio message as previously described. The call is re-established in response to a positive response from the user, such as depressing the single key on the keypad 170 (FIG. 2). At time t′4, a cellular call is in progress. The call re-establishment is very fast and takes place within a few seconds. If caller ID is not available, the user is prompted to enter the number to call back and re-establish the dropped call. - In this case where the dropped call is an incoming call, the cost of the call moves from the originator at the
remote telephone 120 to the user of thedual mode handset 110. Therefore, even if caller ID is available, it is preferable that the user be prompted prior for automatic re-dial, e.g., by displaying on the screen 280 (FIG. 2) an appropriate message such as ‘Re-establish call? Yes/No’. - User Initiated Handover
- The user is prompted that the alternate service, e.g., the cheaper service, is now available and is invited to change service.
- FIG. 5 is an exemplary signaling diagram showing a sequence of events tt1 to tt4 for user initiated handover of calls from a cellular system to a cordless system. Of course if desired, the handset (e.g., its microprocessor) may also be programmed for user initiated handover of calls from a cordless system to a cellular system.
- At time tt1, an outgoing cellular call is in progress initiated by the
handset 110. Although FIG. 5 is directed to an outgoing cellular call, the following description is equally applicable for an incoming cellular call, as well as for an incoming call, whether cellular or cordless. As shown in FIG. 5, the cellular call is connected to theremote telephone 120 through a first cellular link L8 between thehandset 110 and thecellular base station 130, a second cellular link L9 between thecellular base station 130 and the PSTN, and another link L10 between the PSTN and theremote telephone 120. - At time tt2, the microprocessor 245 (FIG. 2) of the
handset 110 detects that the alternate service becomes available, e.g., the cheaper cordless service, such as when thehandset 110 is within range of thecordless base station 150. Thehandset 110 invites the user to hand-over the call to the cheaper service using a video and/or audio message as previously described. The user warns the remote party verbally that the current call will be dropped and re-established, and accepts the invitation, for example, by depressing a single key on the keypad 270 (FIG. 2). - At time tt3 and in response to the acceptance of the user to use the cheaper cellular service, the
handset 110 hangs up and drops the current cellular call, and automatically redials using the cellular system. Next, theremote telephone 120 rings and is answered by the remote user. This establishes a cellular call between thehandset 110 and theremote telephone 120. At time tt4, a cordless call is in progress. - This call switching from a more expensive service, e.g., a cellular call, to a less expensive service, e.g., a cordless call, is very fast and takes place within a few seconds. It should be noted that in this illustrative example, it is assumed that the cordless service is cheaper than the cellular service. However, it is understood that any cheaper service may be chosen. Thus, the user-initiated handover may also be performed for switching cellular calls to cordless calls.
- Note that the previously described events, such as the dropped calls and moving into range of a cheaper system, would typically cause a user to perform the above described actions manually if call re-establishment is desired. Therefore, the above described features of the dual mode mobile handset provide convenience and value to the user to automatically perform actions quickly that otherwise would have been performed manually requiring longer periods of time for call re-establishment. Further, battery life (before requiring a charge) of the dual mode mobile handset is extended since there is no need for extended simultaneous operation of both the cellular and cordless modes, as well as no need for power consuming signal strength evaluations.
- The dual mode handset re-establishes dropped calls quickly and without requiring any input data or from the cordless or cellular base stations. The dropped call is re-established without any data about the dropped call stored in the base stations. For example, there is no need for the base stations to store the links of the current call in case it is dropped. Further, there is no need to monitor the strength of signals for call hand-over. Instead of call hand-over, the call is re-established when it is dropped.
- While the present invention has been described in particular detail, it should also be appreciated that numerous modifications are possible within the intended spirit and scope of the invention. In interpreting the appended claims it should be understood that:
- a) the word “comprising” does not exclude the presence of other elements or acts than those listed in a claim;
- b) the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
- c) any reference signs in the claims do not limit their scope; and
- d) several “means” may be represented by the same item of hardware or software implemented structure or function.
Claims (22)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/467,591 US6445921B1 (en) | 1999-12-20 | 1999-12-20 | Call re-establishment for a dual mode telephone |
CNB00806539XA CN1186951C (en) | 1999-12-20 | 2000-12-05 | Call re-establishment for dual mode telephone |
JP2001547892A JP2003518847A (en) | 1999-12-20 | 2000-12-05 | Call re-establishment for dual mode phones |
PCT/EP2000/012254 WO2001047290A2 (en) | 1999-12-20 | 2000-12-05 | Call re-establishment for a dual mode telephone |
KR1020017010457A KR20010102217A (en) | 1999-12-20 | 2000-12-05 | Call re-establishment for a dual mode telephone |
EP00990654A EP1177701A2 (en) | 1999-12-20 | 2000-12-05 | Call re-establishment for a dual mode telephone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/467,591 US6445921B1 (en) | 1999-12-20 | 1999-12-20 | Call re-establishment for a dual mode telephone |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020049073A1 true US20020049073A1 (en) | 2002-04-25 |
US6445921B1 US6445921B1 (en) | 2002-09-03 |
Family
ID=23856316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/467,591 Expired - Lifetime US6445921B1 (en) | 1999-12-20 | 1999-12-20 | Call re-establishment for a dual mode telephone |
Country Status (6)
Country | Link |
---|---|
US (1) | US6445921B1 (en) |
EP (1) | EP1177701A2 (en) |
JP (1) | JP2003518847A (en) |
KR (1) | KR20010102217A (en) |
CN (1) | CN1186951C (en) |
WO (1) | WO2001047290A2 (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020147008A1 (en) * | 2001-01-29 | 2002-10-10 | Janne Kallio | GSM Networks and solutions for providing seamless mobility between GSM Networks and different radio networks |
US20030104809A1 (en) * | 2001-12-05 | 2003-06-05 | Donald E. Godshaw | Local wireless network system for cellular telephones |
US6778824B2 (en) | 2002-06-19 | 2004-08-17 | Telular Corp. | Apparatus for wirelessly-coupling a bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US20050009558A1 (en) * | 2003-06-30 | 2005-01-13 | Miki Kashima | Mobile terminal and key operation method capable of restoring operation environment |
US20050130650A1 (en) * | 2003-12-15 | 2005-06-16 | International Business Machines Corporation | Cellular to 802.11 voice roaming utilizing SIP signaling |
US20050202849A1 (en) * | 2004-03-10 | 2005-09-15 | Gary Ignatin | Method for re-establishing telephone calls after unintended termination |
US20050221845A1 (en) * | 2004-04-05 | 2005-10-06 | Benco David S | Cordless and cellular communication session handoff |
US20050286690A1 (en) * | 2004-06-02 | 2005-12-29 | Interdigital Technology Corporation | Method and system for routing calls based on user provided mobile station usage parameters |
US20060084467A1 (en) * | 2004-10-09 | 2006-04-20 | Lg Electronics Inc. | Apparatus and method for selectively connecting mobile communication terminal to telephone network |
WO2006097810A1 (en) * | 2005-03-15 | 2006-09-21 | Nokia Corporation | Call re-establishment via alternative access network |
US20070054659A1 (en) * | 2005-09-05 | 2007-03-08 | Sunplus Technology Co., Ltd. | Multimode communication device having an automatic call-back setting mechanism and its method |
US7236772B1 (en) * | 1999-07-26 | 2007-06-26 | Agere Systems Inc. | Wireless call information transfer |
US20070183394A1 (en) * | 2006-02-03 | 2007-08-09 | Deepak Khandelwal | Automatic call origination for multiple wireless networks |
US7284266B1 (en) * | 2000-03-21 | 2007-10-16 | Broadcom Corporation | System and method for secure biometric identification |
US20080198842A1 (en) * | 2000-06-29 | 2008-08-21 | Ching-Yi Lin | Phone appliance with display screen and methods of using the same |
US20090305737A1 (en) * | 2008-06-09 | 2009-12-10 | Samsung Electronics Co. Ltd. | Dual standby mobile device and communication method thereof |
US20110077012A1 (en) * | 2009-09-28 | 2011-03-31 | Samsung Electronics Co., Ltd. | Method and system of power saving and portable device using the same |
US8738081B2 (en) | 2008-04-23 | 2014-05-27 | Mediatek Inc. | Methods for handling apparatus originated communication requests and communication apparatuses utilizing the same |
US8755502B1 (en) * | 2007-02-07 | 2014-06-17 | Sprint Spectrum L.P. | Call contention mediation after dropped call |
US9185238B1 (en) * | 2014-04-23 | 2015-11-10 | Outlook Amusements, Inc. | System and method for scheduling, establishing and maintaining an open communication channel with an advisor |
Families Citing this family (128)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU7584298A (en) * | 1997-05-21 | 1998-12-11 | E.S.P. Communications, Inc. | System, method and apparatus for "caller only" initiated two-way wireless communication with caller generated billing |
KR100277104B1 (en) * | 1998-12-03 | 2001-01-15 | 윤종용 | Method for reconnection of a dropped call in mobile communication system |
JP2000253140A (en) * | 1999-03-01 | 2000-09-14 | Sony Corp | Electronic equipment |
EP1113684A1 (en) * | 1999-12-29 | 2001-07-04 | Koninklijke Philips Electronics N.V. | System, device and method of simultaneously connecting to two TDMA transmission systems |
KR100670887B1 (en) * | 2000-01-31 | 2007-01-18 | 후지쯔 가부시끼가이샤 | Communication controller and computer-readable recording medium for storing a communication control program |
JP4493252B2 (en) * | 2000-03-23 | 2010-06-30 | アルカテル−ルーセント | How to protect radio waves in certain zones against the use of mobile phones |
JP3421639B2 (en) * | 2000-06-01 | 2003-06-30 | 富士通株式会社 | Communication monitoring control for preventing RF signal interference in an information processing device having a plurality of wireless communication units |
DE10050042A1 (en) * | 2000-10-10 | 2002-04-18 | Infineon Technologies Ag | Data transmission over radio interface between analog telephone connection and data processing user device involves decoding/encoding on radio interface side remote from base station |
US20020177453A1 (en) * | 2000-11-15 | 2002-11-28 | Ming-Feng Chen | Mobile device server |
US20020086706A1 (en) * | 2000-11-15 | 2002-07-04 | Ming-Feng Chen | Mobile device server |
ES2240891T3 (en) * | 2000-11-17 | 2005-10-16 | Telefonaktiebolaget Lm Ericsson (Publ) | MOBILE COMMUNICATION NETWORK. |
US20050239453A1 (en) * | 2000-11-22 | 2005-10-27 | Vikberg Jari T | Mobile communication network |
US7260401B2 (en) * | 2000-12-05 | 2007-08-21 | Qualcomm Incorporated | Method and apparatus for flexible call recovery in a wireless communication system |
US7567781B2 (en) * | 2001-01-05 | 2009-07-28 | Qualcomm, Incorporated | Method and apparatus for power level adjustment in a wireless communication system |
US7945266B2 (en) * | 2000-12-05 | 2011-05-17 | Qualcomm Incorporated | Method and apparatus for call recovery in a wireless communication system |
US6845245B2 (en) * | 2000-12-22 | 2005-01-18 | Denso Corporation | Access parameter adaptation and packet data resource management using detailed mobile status information |
US20020090977A1 (en) * | 2001-01-08 | 2002-07-11 | Syagration Ltd. | Automatic signal transfer apparatus for mobile phone |
US7890099B2 (en) * | 2001-02-26 | 2011-02-15 | Kineto Wireless, Inc. | Method for automatic and seamless call transfers between a licensed wireless system and an unlicensed wireless system |
US7308263B2 (en) | 2001-02-26 | 2007-12-11 | Kineto Wireless, Inc. | Apparatus for supporting the handover of a telecommunication session between a licensed wireless system and an unlicensed wireless system |
US6968334B2 (en) * | 2001-05-15 | 2005-11-22 | Nokia Corporation | Method and business process to maintain privacy in distributed recommendation systems |
US20020187788A1 (en) * | 2001-06-07 | 2002-12-12 | Mckay Charles Laurence | Mobile communications system |
US7136639B2 (en) * | 2001-06-14 | 2006-11-14 | Interdigital Technology Corporation | Sub base station and user equipment implementations |
US20060240806A1 (en) * | 2001-07-18 | 2006-10-26 | Saban Demirbasa | Data security device |
US8032084B2 (en) * | 2001-07-18 | 2011-10-04 | Data Transfer & Communications Limited | Data security device |
EP1298899A1 (en) * | 2001-09-28 | 2003-04-02 | Siemens Aktiengesellschaft | Method of informing one party of a connection, that the other party has become available again after a connection drop in a mobile network |
US20030078002A1 (en) * | 2001-10-24 | 2003-04-24 | Raghunandan Sanjeev | Method for wireless link reestablishment |
US7555287B1 (en) | 2001-11-01 | 2009-06-30 | Nokia Corporation | Customized messaging between wireless access point and services |
US7151764B1 (en) | 2001-11-01 | 2006-12-19 | Nokia Corporation | Service notification on a low bluetooth layer |
US6744753B2 (en) * | 2001-11-01 | 2004-06-01 | Nokia Corporation | Local service handover |
DE10204624C1 (en) * | 2002-02-05 | 2003-08-21 | Siemens Ag | Method for the continuation of a communication link including several radio communication systems |
US7340214B1 (en) | 2002-02-13 | 2008-03-04 | Nokia Corporation | Short-range wireless system and method for multimedia tags |
US20030162545A1 (en) * | 2002-02-22 | 2003-08-28 | Samsung Electronics Co., Ltd. | Overlapping coverage sectored/omni antenna architecture for dual standard support with handoff to backward-compatible standard during antenna/RF path/system failure |
US7102640B1 (en) | 2002-03-21 | 2006-09-05 | Nokia Corporation | Service/device indication with graphical interface |
JP4239058B2 (en) * | 2002-05-22 | 2009-03-18 | ソニー株式会社 | Radio communication apparatus, radio communication apparatus control method, radio communication apparatus control method program, and recording medium storing radio communication apparatus control method program |
US7103313B2 (en) * | 2002-06-05 | 2006-09-05 | Nokia Corporation | Automatic determination of access point content and services for short-range wireless terminals |
US7787572B2 (en) | 2005-04-07 | 2010-08-31 | Rambus Inc. | Advanced signal processors for interference cancellation in baseband receivers |
MXPA05003176A (en) * | 2002-09-27 | 2006-06-08 | Axesstel Inc | Multimode phone including two wireless modems and a modem processor. |
US7065354B2 (en) * | 2002-10-11 | 2006-06-20 | Samsung Electronics Co., Ltd. | Battery charging apparatus capable of connecting a mobile phone with a wire telephone network and method for enabling the same |
US7885644B2 (en) | 2002-10-18 | 2011-02-08 | Kineto Wireless, Inc. | Method and system of providing landline equivalent location information over an integrated communication system |
US7565145B2 (en) | 2002-10-18 | 2009-07-21 | Kineto Wireless, Inc. | Handover messaging in an unlicensed mobile access telecommunications system |
US7606190B2 (en) | 2002-10-18 | 2009-10-20 | Kineto Wireless, Inc. | Apparatus and messages for interworking between unlicensed access network and GPRS network for data services |
US7369859B2 (en) | 2003-10-17 | 2008-05-06 | Kineto Wireless, Inc. | Method and system for determining the location of an unlicensed mobile access subscriber |
US7873015B2 (en) | 2002-10-18 | 2011-01-18 | Kineto Wireless, Inc. | Method and system for registering an unlicensed mobile access subscriber with a network controller |
US7953423B2 (en) | 2002-10-18 | 2011-05-31 | Kineto Wireless, Inc. | Messaging in an unlicensed mobile access telecommunications system |
US7634269B2 (en) | 2002-10-18 | 2009-12-15 | Kineto Wireless, Inc. | Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system |
US7349698B2 (en) | 2002-10-18 | 2008-03-25 | Kineto Wireless, Inc. | Registration messaging in an unlicensed mobile access telecommunications system |
US7640008B2 (en) | 2002-10-18 | 2009-12-29 | Kineto Wireless, Inc. | Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system |
KR20070044072A (en) | 2002-10-18 | 2007-04-26 | 키네토 와이어리즈 인코포레이션 | Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system |
US7471655B2 (en) | 2003-10-17 | 2008-12-30 | Kineto Wireless, Inc. | Channel activation messaging in an unlicensed mobile access telecommunications system |
US7689212B2 (en) * | 2002-11-18 | 2010-03-30 | Lg Electronics Inc. | Mobile communication system exchanging state information and operation method thereof |
KR100539781B1 (en) * | 2003-02-22 | 2006-01-10 | 엘지전자 주식회사 | A method and a device of setup rf path for dual mode mobile phone |
US20040181517A1 (en) * | 2003-03-13 | 2004-09-16 | Younghee Jung | System and method for social interaction |
US9042371B1 (en) | 2003-04-10 | 2015-05-26 | Rpx Clearinghouse Llc | Integrating telephone lines with packet connections |
US7844270B2 (en) * | 2003-05-21 | 2010-11-30 | Nortel Networks Limited | Call transfer for an integrated wireline and wireless service using a temporary directory number |
US9078174B2 (en) * | 2003-05-21 | 2015-07-07 | Rpx Clearinghouse Llc | Call transfer for an integrated wireline and wireless service |
US7664036B2 (en) * | 2003-05-22 | 2010-02-16 | Broadcom Corporation | Dynamic real-time quality management of packetized communications in a network environment |
DE50308697D1 (en) * | 2003-09-04 | 2008-01-10 | Swisscom Mobile Ag | Method and system for a handover of a mobile device between a first and a second radio network |
US7221946B2 (en) | 2003-09-22 | 2007-05-22 | Broadcom Corporation | Automatic quality of service based resource allocation |
US7283822B2 (en) | 2003-10-17 | 2007-10-16 | Kineto Wireless, Inc. | Service access control interface for an unlicensed wireless communication system |
US7272397B2 (en) | 2003-10-17 | 2007-09-18 | Kineto Wireless, Inc. | Service access control interface for an unlicensed wireless communication system |
US7103371B1 (en) * | 2003-10-22 | 2006-09-05 | Itt Manufacturing Enterprises, Inc. | Method and apparatus for dynamic voice reservation within wireless networks |
US7734293B2 (en) * | 2003-10-29 | 2010-06-08 | Martin Zilliacus | Mapping wireless proximity identificator to subscriber identity for hotspot based wireless services for mobile terminals |
US7768977B2 (en) * | 2003-11-04 | 2010-08-03 | Sony Ericsson Mobile Communications Ab | Establishing a communication link by selectively powering a transceiver based on a communication request received by another transceiver |
US8271024B1 (en) | 2003-11-26 | 2012-09-18 | Genband Us Llc | Messaging service interworking |
US20050136837A1 (en) * | 2003-12-22 | 2005-06-23 | Nurminen Jukka K. | Method and system for detecting and using context in wireless networks |
US20050202810A1 (en) * | 2004-03-11 | 2005-09-15 | Lapallo George | Mobile and landline connection |
CN100407805C (en) * | 2004-03-16 | 2008-07-30 | 华为技术有限公司 | A method for implementing service reconstruction in mobile communication system |
US20050239496A1 (en) * | 2004-04-14 | 2005-10-27 | Nortel Networks Limited | Mobile terminal with wired and wireless network interfaces |
GB2413454B (en) * | 2004-04-19 | 2006-12-27 | Intelli Call Ltd | Providing information relating to a telephone call |
US7957348B1 (en) | 2004-04-21 | 2011-06-07 | Kineto Wireless, Inc. | Method and system for signaling traffic and media types within a communications network switching system |
US8041385B2 (en) | 2004-05-14 | 2011-10-18 | Kineto Wireless, Inc. | Power management mechanism for unlicensed wireless communication systems |
US7174176B1 (en) * | 2004-07-12 | 2007-02-06 | Frank Kung Fu Liu | Cordless security system and method |
US20060019698A1 (en) * | 2004-07-23 | 2006-01-26 | Motorola, Inc. | Method and apparatus for radio system with multiple communication modes |
US7940746B2 (en) | 2004-08-24 | 2011-05-10 | Comcast Cable Holdings, Llc | Method and system for locating a voice over internet protocol (VoIP) device connected to a network |
US7542756B2 (en) * | 2004-09-28 | 2009-06-02 | Siemens Communications, Inc. | Apparatus and method for restoring a conference connection to a cellular telephone |
US20060075075A1 (en) * | 2004-10-01 | 2006-04-06 | Malinen Jouni I | Method and system to contextually initiate synchronization services on mobile terminals in an enterprise environment |
US20060132832A1 (en) * | 2004-12-17 | 2006-06-22 | Sap Aktiengesellschaft | Automated telephone number transfer |
US7598855B2 (en) | 2005-02-01 | 2009-10-06 | Location Based Technologies, Inc. | Apparatus and method for locating individuals and objects using tracking devices |
US7933598B1 (en) | 2005-03-14 | 2011-04-26 | Kineto Wireless, Inc. | Methods and apparatuses for effecting handover in integrated wireless systems |
US7756546B1 (en) | 2005-03-30 | 2010-07-13 | Kineto Wireless, Inc. | Methods and apparatuses to indicate fixed terminal capabilities |
US7844295B1 (en) * | 2005-05-17 | 2010-11-30 | Sprint Spectrum L.P. | Using a wireless intercom to talk-around a cellular wireless network |
US7843900B2 (en) | 2005-08-10 | 2010-11-30 | Kineto Wireless, Inc. | Mechanisms to extend UMA or GAN to inter-work with UMTS core network |
US7515575B1 (en) | 2005-08-26 | 2009-04-07 | Kineto Wireless, Inc. | Intelligent access point scanning with self-learning capability |
CN100446599C (en) * | 2005-09-16 | 2008-12-24 | 鸿富锦精密工业(深圳)有限公司 | Double-mode cell phone speech incoming phone management system and method |
JP2007201941A (en) * | 2006-01-27 | 2007-08-09 | Kyocera Corp | Radio communication device |
DE602006007305D1 (en) * | 2006-02-10 | 2009-07-30 | Research In Motion Ltd | Method and system for signaling the forwarding of voice connections between access points in a wireless local area network |
ATE391390T1 (en) * | 2006-02-10 | 2008-04-15 | Research In Motion Ltd | METHOD AND SYSTEM FOR SAVING BATTERY ENERGY IN WIRELESS DEVICES OPERATING IN A LOCAL WIRELESS NETWORK |
US8165086B2 (en) | 2006-04-18 | 2012-04-24 | Kineto Wireless, Inc. | Method of providing improved integrated communication system data service |
US7912004B2 (en) | 2006-07-14 | 2011-03-22 | Kineto Wireless, Inc. | Generic access to the Iu interface |
US20080076425A1 (en) | 2006-09-22 | 2008-03-27 | Amit Khetawat | Method and apparatus for resource management |
US7852817B2 (en) | 2006-07-14 | 2010-12-14 | Kineto Wireless, Inc. | Generic access to the Iu interface |
US20080039086A1 (en) * | 2006-07-14 | 2008-02-14 | Gallagher Michael D | Generic Access to the Iu Interface |
US8036664B2 (en) | 2006-09-22 | 2011-10-11 | Kineto Wireless, Inc. | Method and apparatus for determining rove-out |
US7995994B2 (en) | 2006-09-22 | 2011-08-09 | Kineto Wireless, Inc. | Method and apparatus for preventing theft of service in a communication system |
US8073428B2 (en) | 2006-09-22 | 2011-12-06 | Kineto Wireless, Inc. | Method and apparatus for securing communication between an access point and a network controller |
US8204502B2 (en) | 2006-09-22 | 2012-06-19 | Kineto Wireless, Inc. | Method and apparatus for user equipment registration |
US7974610B2 (en) * | 2006-11-17 | 2011-07-05 | Comverse Ltd. | Persistence of interrupted calls |
US8032547B2 (en) | 2006-12-05 | 2011-10-04 | Research In Motion Limited | Methods and apparatus for use in controlling a scan rate for scanning operations in a mobile communication device |
US7647042B2 (en) | 2006-12-05 | 2010-01-12 | Research In Motion Limited | User interface methods and apparatus for processing voice call requests from a mobile station based on communication conditions |
EP1931120B1 (en) * | 2006-12-05 | 2014-03-05 | Motorola Mobility LLC | User interface methods and apparatus for processing voice call requests from mobile station based on communication conditions |
US7676249B2 (en) | 2006-12-05 | 2010-03-09 | Research In Motion Limited | Alert methods and apparatus for call appointments in a calendar application based on communication conditions of a mobile station |
US8019331B2 (en) | 2007-02-26 | 2011-09-13 | Kineto Wireless, Inc. | Femtocell integration into the macro network |
US9111189B2 (en) | 2007-10-31 | 2015-08-18 | Location Based Technologies, Inc. | Apparatus and method for manufacturing an electronic package |
US8244468B2 (en) | 2007-11-06 | 2012-08-14 | Location Based Technology Inc. | System and method for creating and managing a personalized web interface for monitoring location information on individuals and objects using tracking devices |
US8224355B2 (en) | 2007-11-06 | 2012-07-17 | Location Based Technologies Inc. | System and method for improved communication bandwidth utilization when monitoring location information |
US8497774B2 (en) | 2007-04-05 | 2013-07-30 | Location Based Technologies Inc. | Apparatus and method for adjusting refresh rate of location coordinates of a tracking device |
US8102256B2 (en) | 2008-01-06 | 2012-01-24 | Location Based Technologies Inc. | Apparatus and method for determining location and tracking coordinates of a tracking device |
US8774827B2 (en) | 2007-04-05 | 2014-07-08 | Location Based Technologies, Inc. | Apparatus and method for generating position fix of a tracking device in accordance with a subscriber service usage profile to conserve tracking device power |
US7933581B2 (en) | 2007-06-08 | 2011-04-26 | Research In Motion Limited | Methods and apparatus for use in processing disconnected emergency calls and other communications involving mobile communication devices and the remote monitoring thereof |
CN101389108B (en) * | 2007-09-13 | 2012-04-18 | 中兴通讯股份有限公司 | Method for detecting network failure by double mode mobile phone |
US8654974B2 (en) | 2007-10-18 | 2014-02-18 | Location Based Technologies, Inc. | Apparatus and method to provide secure communication over an insecure communication channel for location information using tracking devices |
US8000739B2 (en) * | 2007-12-12 | 2011-08-16 | Aruba Networks, Inc. | Single number presentation for dual-mode phones |
US8538387B2 (en) * | 2007-12-12 | 2013-09-17 | Aruba Networks, Inc. | Single voicemail for dual-mode phones |
US8744451B2 (en) * | 2007-12-12 | 2014-06-03 | Aruba Networks, Inc. | Delayed ACK in dual-mode call handover |
US8712452B2 (en) * | 2007-12-21 | 2014-04-29 | Aruba Networks, Inc. | Enterprise seamless mobility |
US20090163229A1 (en) * | 2007-12-21 | 2009-06-25 | Aruba Networks, Inc. | Indicators for Dual-Mode Phones |
CN101217813B (en) * | 2008-01-09 | 2011-03-30 | 闻泰集团有限公司 | A method of cross-district calling of dual-card dual-standby mobile telephone |
US8108002B2 (en) * | 2008-03-21 | 2012-01-31 | Mediatek Inc. | Communication apparatuses equipped with more than one subscriber identity card and capable of providing reliable communication quality |
US8068870B2 (en) * | 2008-04-14 | 2011-11-29 | Aruba Networks, Inc. | Enterprise location discovery in dual-mode phones |
US8041335B2 (en) | 2008-04-18 | 2011-10-18 | Kineto Wireless, Inc. | Method and apparatus for routing of emergency services for unauthorized user equipment in a home Node B system |
US20100093389A1 (en) * | 2008-10-14 | 2010-04-15 | Sony Ericsson Mobile Communications Ab | Responding to a paging request from a gsm network by setting up the call through a umts network |
CN101931712A (en) * | 2010-08-03 | 2010-12-29 | 惠州Tcl移动通信有限公司 | Method for automatically prompting user of redialing |
US8862136B2 (en) * | 2011-03-10 | 2014-10-14 | Husain K. Alotaibi | System and method for making outgoing calls at reduced cost |
CN102186159B (en) * | 2011-04-27 | 2014-01-15 | 惠州Tcl移动通信有限公司 | Mobile equipment and communication method of same |
CN103999438B (en) | 2012-12-14 | 2017-11-21 | 华为技术有限公司 | It is subscribe to callback more |
CN104780517A (en) * | 2014-01-15 | 2015-07-15 | 诺基亚公司 | Method and device for communication of mobile phone |
US9197745B1 (en) | 2015-03-25 | 2015-11-24 | Captioncall, Llc | Communication device and related methods for automatically connecting to a captioning communication service to receive text captions following an interruption during a call |
CN106973171B (en) * | 2017-03-28 | 2019-07-09 | 上海联彤网络通讯技术有限公司 | The system and method for establishing optimal communication line for multimode communication apparatus |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661972A (en) * | 1985-02-18 | 1987-04-28 | Nec Corporation | Mobile telephone system for automatically paging absent mobile subscriber |
GB2179823A (en) | 1985-08-28 | 1987-03-11 | Philips Electronic Associated | Communications system |
US4901307A (en) * | 1986-10-17 | 1990-02-13 | Qualcomm, Inc. | Spread spectrum multiple access communication system using satellite or terrestrial repeaters |
US4799253A (en) * | 1987-07-20 | 1989-01-17 | Motorola, Inc. | Colocated cellular radiotelephone systems |
US4989230A (en) * | 1988-09-23 | 1991-01-29 | Motorola, Inc. | Cellular cordless telephone |
US5127042A (en) * | 1988-09-23 | 1992-06-30 | Motorola, Inc. | Cellular cordless telephone |
US5222248A (en) * | 1990-11-01 | 1993-06-22 | Motorola, Inc. | Call hand-off with user selectable site switching |
US5649308A (en) * | 1993-04-12 | 1997-07-15 | Trw Inc. | Multiformat auto-handoff communications handset |
GB2282731C (en) | 1993-10-08 | 2006-09-06 | Nokia Telecommunications Oy | Dual mode subscriber terminal and a handover procedure of the dual mode subscriber terminal in a mobile telecommunications network |
US5862208A (en) * | 1994-02-16 | 1999-01-19 | Priority Call Management, Inc. | Method and system for enabling a party to change terminals during a call |
US5594782A (en) * | 1994-02-24 | 1997-01-14 | Gte Mobile Communications Service Corporation | Multiple mode personal wireless communications system |
US5673308A (en) * | 1994-10-12 | 1997-09-30 | Bell Atlantic Network Services, Inc. | Personal phone number system |
US5999811A (en) * | 1996-02-16 | 1999-12-07 | Ericsson, Inc. | Mobile telephone for roaming using dual mode/band equipment including SIM cards |
JPH09233555A (en) | 1996-02-27 | 1997-09-05 | Nec Corp | Common use telephone set |
DE19637437C1 (en) | 1996-09-13 | 1998-04-23 | Siemens Ag | Transfer of a connection between a DECT subsystem and a mobile radio system |
US6327470B1 (en) | 1997-11-07 | 2001-12-04 | Ericsson Inc. | Handover between fixed and mobile networks for dual mode phones |
-
1999
- 1999-12-20 US US09/467,591 patent/US6445921B1/en not_active Expired - Lifetime
-
2000
- 2000-12-05 EP EP00990654A patent/EP1177701A2/en not_active Ceased
- 2000-12-05 CN CNB00806539XA patent/CN1186951C/en not_active Expired - Lifetime
- 2000-12-05 KR KR1020017010457A patent/KR20010102217A/en not_active Application Discontinuation
- 2000-12-05 WO PCT/EP2000/012254 patent/WO2001047290A2/en not_active Application Discontinuation
- 2000-12-05 JP JP2001547892A patent/JP2003518847A/en not_active Withdrawn
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7236772B1 (en) * | 1999-07-26 | 2007-06-26 | Agere Systems Inc. | Wireless call information transfer |
US7284266B1 (en) * | 2000-03-21 | 2007-10-16 | Broadcom Corporation | System and method for secure biometric identification |
US20080039140A1 (en) * | 2000-03-21 | 2008-02-14 | Broadcom Corporation | System and method for secure biometric identification |
US8687781B2 (en) * | 2000-06-29 | 2014-04-01 | Ching-Yi Lin | Phone appliance with display screen and methods of using the same |
US11563834B2 (en) | 2000-06-29 | 2023-01-24 | Ching-Yi Lin | Phone appliance with display screen and methods for using the same |
US11652914B2 (en) | 2000-06-29 | 2023-05-16 | Ching-Yi Lin | Phone appliance with display screen and methods of using the same |
US20080198842A1 (en) * | 2000-06-29 | 2008-08-21 | Ching-Yi Lin | Phone appliance with display screen and methods of using the same |
US20020147008A1 (en) * | 2001-01-29 | 2002-10-10 | Janne Kallio | GSM Networks and solutions for providing seamless mobility between GSM Networks and different radio networks |
US8019335B2 (en) * | 2001-01-29 | 2011-09-13 | Nokia Corporation | Identifying neighboring cells in telecommunication network |
US20030104809A1 (en) * | 2001-12-05 | 2003-06-05 | Donald E. Godshaw | Local wireless network system for cellular telephones |
US20040264430A1 (en) * | 2002-06-19 | 2004-12-30 | Wonak Daniel C. | Apparatus for wirelessly-coupling a bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US7069006B2 (en) | 2002-06-19 | 2006-06-27 | Telular Corp. | Apparatus for wirelessly-coupling a Bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US6778824B2 (en) | 2002-06-19 | 2004-08-17 | Telular Corp. | Apparatus for wirelessly-coupling a bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US7190954B2 (en) | 2003-06-11 | 2007-03-13 | Telular Corp. | Apparatus for wirelessly-coupling a Bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US20060148420A1 (en) * | 2003-06-11 | 2006-07-06 | Wonak Daniel C | Apparatus for wirelessly-coupling a Bluetooth-wireless cellular mobile handset to a docking station for connecting a standard telephone set to the cellular network |
US20050009558A1 (en) * | 2003-06-30 | 2005-01-13 | Miki Kashima | Mobile terminal and key operation method capable of restoring operation environment |
US7215959B2 (en) * | 2003-12-15 | 2007-05-08 | International Business Machines Corporation | Cellular to 802.11 voice roaming utilizing SIP signaling |
US20050130650A1 (en) * | 2003-12-15 | 2005-06-16 | International Business Machines Corporation | Cellular to 802.11 voice roaming utilizing SIP signaling |
US7486949B2 (en) * | 2004-03-10 | 2009-02-03 | Broadcom Corporation | Method for re-establishing telephone calls after unintended termination |
US20090143050A1 (en) * | 2004-03-10 | 2009-06-04 | Gary Ignatin | Method for re-establishing telephone calls after unintended termination |
US7894800B2 (en) * | 2004-03-10 | 2011-02-22 | Broadcom Corp. | Method for re-establishing telephone calls after unintended termination |
US20050202849A1 (en) * | 2004-03-10 | 2005-09-15 | Gary Ignatin | Method for re-establishing telephone calls after unintended termination |
US20050221845A1 (en) * | 2004-04-05 | 2005-10-06 | Benco David S | Cordless and cellular communication session handoff |
US7376411B2 (en) * | 2004-06-02 | 2008-05-20 | Interdigital Technology Corporation | Method and system for routing calls as determined by a call cost database of a wireless transmit/receive unit |
US20050286690A1 (en) * | 2004-06-02 | 2005-12-29 | Interdigital Technology Corporation | Method and system for routing calls based on user provided mobile station usage parameters |
US20060084467A1 (en) * | 2004-10-09 | 2006-04-20 | Lg Electronics Inc. | Apparatus and method for selectively connecting mobile communication terminal to telephone network |
US7801557B2 (en) * | 2004-10-09 | 2010-09-21 | Lg Electronics Inc. | Apparatus and method for selectively connecting mobile communication terminal to telephone network |
US20060209798A1 (en) * | 2005-03-15 | 2006-09-21 | Nokia Corporation | Call-re-establishment via alternative access network |
WO2006097810A1 (en) * | 2005-03-15 | 2006-09-21 | Nokia Corporation | Call re-establishment via alternative access network |
TWI393476B (en) * | 2005-03-15 | 2013-04-11 | Nokia Corp | Call re-establishment via alternative access network |
US20070054659A1 (en) * | 2005-09-05 | 2007-03-08 | Sunplus Technology Co., Ltd. | Multimode communication device having an automatic call-back setting mechanism and its method |
WO2007092788A3 (en) * | 2006-02-03 | 2007-10-04 | Qualcomm Inc | Automatic call origination for multiple wireless networks |
WO2007092788A2 (en) * | 2006-02-03 | 2007-08-16 | Qualcomm Incorporated | Automatic call origination for multiple wireless networks |
US20070183394A1 (en) * | 2006-02-03 | 2007-08-09 | Deepak Khandelwal | Automatic call origination for multiple wireless networks |
US8755502B1 (en) * | 2007-02-07 | 2014-06-17 | Sprint Spectrum L.P. | Call contention mediation after dropped call |
US8738081B2 (en) | 2008-04-23 | 2014-05-27 | Mediatek Inc. | Methods for handling apparatus originated communication requests and communication apparatuses utilizing the same |
US20090305737A1 (en) * | 2008-06-09 | 2009-12-10 | Samsung Electronics Co. Ltd. | Dual standby mobile device and communication method thereof |
US20110077012A1 (en) * | 2009-09-28 | 2011-03-31 | Samsung Electronics Co., Ltd. | Method and system of power saving and portable device using the same |
US9185192B2 (en) * | 2009-09-28 | 2015-11-10 | Samsung Electronics Co., Ltd. | Method and system of power saving and portable device using the same |
US9185238B1 (en) * | 2014-04-23 | 2015-11-10 | Outlook Amusements, Inc. | System and method for scheduling, establishing and maintaining an open communication channel with an advisor |
Also Published As
Publication number | Publication date |
---|---|
US6445921B1 (en) | 2002-09-03 |
KR20010102217A (en) | 2001-11-15 |
CN1186951C (en) | 2005-01-26 |
JP2003518847A (en) | 2003-06-10 |
WO2001047290A2 (en) | 2001-06-28 |
CN1358394A (en) | 2002-07-10 |
WO2001047290A3 (en) | 2001-11-15 |
EP1177701A2 (en) | 2002-02-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6445921B1 (en) | Call re-establishment for a dual mode telephone | |
US7221950B2 (en) | Auto sensing home base station for mobile telephone with remote answering capabilities | |
US5774805A (en) | Multi-mode communication network with handset-selected channel assignments | |
JP2586631B2 (en) | Cellular radiotelephone apparatus and method with dropped call protection circuit | |
US8346169B2 (en) | Enhanced wireless handset, including direct handset-to-handset communication mode | |
KR100225313B1 (en) | Radion telephone system | |
US8285244B2 (en) | Uniform emergency interconnect access in a multi-modal device | |
EP0954156A2 (en) | Conference call | |
JPH031621A (en) | Cellular-cordless telephone | |
AU5339800A (en) | System and method for wireless local calling | |
US7844295B1 (en) | Using a wireless intercom to talk-around a cellular wireless network | |
US7174187B1 (en) | Multimodal wireless communication device with user selection of transceiver mode via dialing string | |
JPH07264657A (en) | Mobile radio communication device | |
AU724390B2 (en) | Mobile telephone and mobile telephone system | |
EP1665848B1 (en) | Systems and methods for enhanced over-the-air programming | |
JP2962411B2 (en) | Mobile phone | |
JP3056869B2 (en) | Mobile radio communication device | |
JP2975850B2 (en) | Digital cordless telephone equipment | |
JPH09247749A (en) | Portable telephone system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PHILIPS ELECTRONICS NORTH AMERICA CORPORATION, NEW Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BELL, JOHN R.;REEL/FRAME:010473/0938 Effective date: 19991217 |
|
AS | Assignment |
Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PHILIPS ELECTRONICS NORTH AMERICA CORPORATION;REEL/FRAME:013051/0605 Effective date: 20020626 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: IPG ELECTRONICS 503 LIMITED Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KONINKLIJKE PHILIPS ELECTRONICS N.V.;REEL/FRAME:022203/0791 Effective date: 20090130 Owner name: IPG ELECTRONICS 503 LIMITED, GUERNSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KONINKLIJKE PHILIPS ELECTRONICS N.V.;REEL/FRAME:022203/0791 Effective date: 20090130 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
REMI | Maintenance fee reminder mailed | ||
FPAY | Fee payment |
Year of fee payment: 8 |
|
SULP | Surcharge for late payment |
Year of fee payment: 7 |
|
AS | Assignment |
Owner name: PENDRAGON WIRELESS LLC, WASHINGTON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:IPG ELECTRONICS 503 LIMITED;REEL/FRAME:028594/0224 Effective date: 20120410 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: UNILOC LUXEMBOURG S.A., LUXEMBOURG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PENDRAGON WIRELESS LLC;REEL/FRAME:045338/0601 Effective date: 20180131 |
|
AS | Assignment |
Owner name: UNILOC 2017 LLC, DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNILOC LUXEMBOURG S.A.;REEL/FRAME:046532/0088 Effective date: 20180503 |