WO2005065287A2 - Method and apparatus for providing push-to-talk services in a cellular communication system - Google Patents
Method and apparatus for providing push-to-talk services in a cellular communication system Download PDFInfo
- Publication number
- WO2005065287A2 WO2005065287A2 PCT/US2004/043510 US2004043510W WO2005065287A2 WO 2005065287 A2 WO2005065287 A2 WO 2005065287A2 US 2004043510 W US2004043510 W US 2004043510W WO 2005065287 A2 WO2005065287 A2 WO 2005065287A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile station
- user
- communication session
- speech
- receiving
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
- H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
Definitions
- the present invention relates generally to cellular communication systems, and, in particular, to provision of Push-To-Talk communication services in an interconnect cellular communication system.
- CDMA Code Division Multiple Access
- dispatch services have been traditionally provided by two-way radio systems.
- Traditional dispatch services typically allow for instant access by a mobile station originating a call to a target mobile station.
- a dispatch group call service enables a user to communicate with a group of people simultaneously and instantaneously, typically by depressing a Push-To-Talk (PTT) key.
- PTT Push-To-Talk
- a dispatch point- to-point call service enables a user to communicate with another user quickly and spontaneously, again typically by depressing a PTT key. This feature is ideal for two people who are working together but are unable to speak with one another directly such as two people working in concert but in different parts of a building. Where a wireless telephone call may be more appropriate for a conversation, short messages between two people as they work are better facilitated by the dispatch point-to-point call service.
- the cellular phone conveys a call origination message to the infrastructure identifying one or more cellular phones or a talkgroup associated with the selected entry.
- the infrastructure conveys a paging message to the one or more identified cellular phones or to one or more cellular phones associated with the identified talkgroup.
- each called cellular phone wakes up and conveys a page response back to the infrastructure.
- a PTT phone call is then set up. This process of waking up a called cellular phone and establishing a PTT phone call may take another 3-4 seconds.
- the user of the originating cellular phone is not permitted to speak until receiving a Talk Permit Tone (TPT), which is not conveyed to the user until traffic channels are established between the infrastructure and the one or more called cellular phones.
- TPT Talk Permit Tone
- 9-10 seconds may expire between a time that the user of the originating cellular phone determines to initiate a PTT phone call and a time that the user is permitted to speak.
- FIG. 1 is a block diagram of a wireless communication system in accordance with an embodiment of the present invention.
- FIG. 2 is a block diagram of a Packet Data Control Switch of FIG. 1 in accordance with an embodiment of the present invention.
- FIG. 3 is a block diagram of a mobile station of FIG. 1 in accordance with an embodiment of the present invention.
- FIG. 4 is a logic flow diagram of a method executed by the communication system of FIG. 1 in establishing a Push-to-Talk (PTT) phone call in accordance with various embodiments of the present invention.
- PTT Push-to-Talk
- FIG. 5A is a logic flow diagram of a method executed by the communication system of FIG. 1 in setting up a PTT phone call in accordance with another embodiment of the present invention.
- FIG. 5B is a continuation of the logic flow diagram of FIG. 5A depicting a method executed by the communication system of FIG. 1 in setting up a PTT phone call in accordance with another embodiment of the present invention.
- FIG. 6A is a logic flow diagram of a method executed by the communication system of FIG. 1 in conveying a voice alert to a called MS in accordance with another embodiment of the present invention.
- FIG. 6B is a continuation of the logic flow diagram of FIG. 6A depicting a method executed by the communication system of FIG. 1 in conveying a voice alert to a called MS in accordance with another embodiment of the present invention.
- a communication system that provides, in association with an originating mobile station (MS), a 'wake up' list of other mobile stations (MSs) that may be awakened prior to the originating MS requesting to set up a PTT call.
- MS mobile station
- MSs mobile stations
- the user may begin speaking prior to completion of the call setup.
- the speech is stored and is conveyed to a called MS when the call is setup. If the call does not get setup or a user of the called MS is not present, the stored speech may be conveyed to the called MS as a voice message.
- the stored speech, or new speech may also be used as an announcement of a call instead of the typical "beep" or "chirp.”
- an embodiment of the present invention encompasses a method for establishing a Push-To-Talk (PTT) communication session in a wireless communication system.
- the method includes receiving a request to wake up a mobile station, in response to receiving the request to wake up a mobile station, waking up the mobile station, and receiving a request to set up a PTT communication session with the mobile station, wherein the request to set up a PTT communication session is received after receipt of the request to wake up the mobile station.
- Another embodiment of the present invention encompasses a method for establishing a PTT communication session in a wireless communication system.
- the method includes receiving a request from a user of a mobile station to set up a PTT communication session, receiving speech from the user of the mobile station prior to completion of the set up of the communication session, storing the received speech to produce stored speech, and, when set up of the communication session is completed, conveying the stored speech.
- Yet another embodiment of the present invention encompasses a method for establishing a PTT communication session in a wireless communication system.
- the method includes receiving a request from a user of a first mobile station to set up a PTT communication session, receiving speech from the user, and conveying the received speech as an alert to a second mobile station.
- Still another embodiment of the present invention encompasses a control switch comprising a processor that receives a request to wake up a mobile station, in response to receiving the request to wake up a mobile station, wakes up the mobile station, and receives a request to set up a PTT communication session with the mobile station, wherein the request to wake up a mobile station is received prior to receipt of the request to set up a PTT communication session with the mobile station.
- Yet another embodiment of the present invention encompasses a mobile station that receives an indication from a user of the mobile station of the user's desire to initiate a PTT communication session, in response to receiving the indication, conveys a request to wake up another mobile station, and subsequent to receiving the indication from the user of the user's desire to initiate a Push-To-Talk (PTT) communication session, and receives an instruction from the user to set up a PTT communication session.
- PTT Push-To-Talk
- Still another embodiment of the present invention encompasses a mobile station that receives a request from a user of the mobile station to set up a PTT communication session, receives speech from the user of the mobile station prior to completion of the set up of the communication session, stores the received speech to produce stored speech and, when set up of the communication session is completed, and conveys the stored speech.
- Yet another embodiment of the present invention encompasses a mobile station that receives a request from a user of the mobile station to set up a PTT communication session, receives speech from the user, and conveys the received speech as an alert to another mobile station.
- FIG. 1 is a block diagram of a wireless communication system 100 in accordance with an embodiment of the present invention.
- Communication system 100 includes multiple Base Station Systems (BSSs) 110, 120, 130 (three shown).
- BSSs Base Station Systems
- Each BSS of the multiple BSSs 110, 120, 130 includes a respective Base Transceiver Station (BTS) 112, 122, 132 that is operably coupled to a respective Base Station Controller (BSC) 114, 124, 134.
- BSC Base Station Controller
- Each BSS of the multiple BSSs 110, 120, 130 is operably coupled to a respective Packet Data Service Node (PDSN) of multiple PDSNs 116, 126, 136.
- PDSN Packet Data Service Node
- communication system 100 may further include a Packet Control Function (PCF) or a Packet Control Unit (PCU) included in each BSC 114, 124, 134 or interposed between each such BSC and a respective PDSN 116, 126, 136.
- PCF Packet Control Function
- PCU Packet Control Unit
- Each BSS of the multiple BSSs 110, 120, 130 is further coupled to a respective Mobile Switching Center (MSC) of multiple MSCs 118, 128, 138.
- MSC Mobile Switching Center
- Communication system 100 further comprises multiple mobile stations (MSs)
- Each MS of the multiple MSs 102-104 is in wireless communication with a respective BSS of the multiple BSSs 110, 120, 130.
- Each BSS 110, 120, 130 provides communications services to a respective MS 102-104 via a respective air interface 106, 107, 108 that includes a forward link and a reverse link.
- Each forward link includes a paging channel, at least one forward link control channel, and at least one forward link traffic channel.
- Each reverse link includes a reverse link access channel, at least one reverse link control channel, and at least one reverse link traffic channel.
- Each MSC 118, 128, 138 further connects to a public network, such as a Public Land Mobile Network (PLMN) or a Public Switched Telephone Network (PSTN) 160, thereby providing a circuit switched network for a communication session involving any one or more of MSs 102-104.
- PLMN Public Land Mobile Network
- PSTN Public Switched Telephone Network
- Each PDSN 116, 126, 136 further connects to an Internet Protocol (IP) network 140, thereby providing a packet switched network for a communication session involving any one or more of MSs 102-104.
- IP Internet Protocol
- Communication system 100 further includes a Location Database 142, an Active Directory 144, a Packet Data Control Switch 146, and a Presence Server 148 that are each operably coupled to IP network 140.
- each PDSN 116, 126, 136, and thereby each BSS 110, 120, 130 and MS 102-104 is able to access Location Database 142, Active Directory 144, and Packet Data Control Switch 146.
- Communication system 100 further includes an external IP network 170, such as the Internet, that is operably coupled to IP network 140.
- BSSs 110, 120, and 130, PDSNs 116, 126, and 136, MSCs 118, 128, and 138, IP network 140, Location Database 142, Active Directory 144, and Packet Data Control Switch 146 are collectively referred to herein as an infrastructure 150 of communication system 100.
- Location Database 142 maintains a record of a mobile identifier (mobile ID) associated with each MS 102-104 active in communication system 100 and further maintains and tracks provisioning and mobility information with respect to each such MS, including registration of the MS when the MS activates in communication system 100.
- a location of each MS 102-104 active in communication system 100 such as a BSS serving the MS.
- Location Database 142 may be implemented in a Home Location Register (HLR) or a Visited Location Register (VLR) as known in the art, or a combination of a HLR and a VLR, or a combination of one or more HLRs and/or VLRs.
- HLR Home Location Register
- VLR Visited Location Register
- Active Directory 144 also known as a Group Call Registry ("GCR"), comprises a database system containing the talkgroup, or user group, data. Active Directory 144 maintains a definition of all talkgroups, such as talkgroup 105, in the system 100, including a talkgroup identifier (talkgroup ID) that is uniquely associated with each talkgroup and, in association with the talkgroup ID, a list of mobile identifiers (mobile IDs) that are uniquely associated with MSs, such as MSs 102-104, that are members of the talkgroup.
- a talkgroup identifier that is, requests a definition of a specified talkgroup
- the directory provides a list of mobile IDs associated with the members of the specified talkgroup. For example, in response to an inquiry specifying a talkgroup ID associated with talkgroup 105, Active Directory 144 may provide the mobile IDs associated with MSs 102-104.
- Packet Data Control Switch 146 comprises a Push-to-Talk (PTT) server that implements group call logic.
- PTT Push-to-Talk
- Packet Data Control Switch 146 operates as described in U.S. patent application serial no. 09/721,329, filed November 22, 2000, and entitled "System and Method of Servicing Mobile Communications with a Proxy Switch,” which application is assigned to the assignee of the present application and is hereby incorporated herein in its entirety.
- Packet Data Control Switch 146 detects a group call initiation by a respective member of a talkgroup, such as one of MSs 102-104 with respect to talkgroup 105, and automatically attempts to connect all of the members of the group in a group call.
- Packet Data Control Switch 146 includes a processor 202, such as one or more microprocessors, microcontrollers, digital signal processors (DSPs), combinations thereof or such other devices known to those having ordinary skill in the art. Packet Data Control Switch 146 further includes at least one memory device 204 associated with processor 202, such as random access memory (RAM), dynamic random access memory (DRAM), and/or read only memory (ROM) or equivalents thereof, that store data and programs, such as group call programs, that may be executed by the processor and that allow the Packet Data Control Switch to perform all functions necessary to operate in communication system 100.
- processor 202 such as one or more microprocessors, microcontrollers, digital signal processors (DSPs), combinations thereof or such other devices known to those having ordinary skill in the art.
- Packet Data Control Switch 146 further includes at least one memory device 204 associated with processor 202, such as random access memory (RAM), dynamic random access memory (DRAM), and/or read only memory (ROM) or equivalents thereof, that store data and programs
- FIG. 3 is a block diagram of a mobile station (MS), such as MSs 102-104, in accordance with an embodiment of the present invention.
- MS mobile station
- Each MS of the multiple MSs 102-104 includes a user interface 302 coupled to a processor 306, such as one or more microprocessors, microcontrollers, digital signal processors (DSPs), combinations thereof or such other devices known to those having ordinary skill in the art.
- processor 306 such as one or more microprocessors, microcontrollers, digital signal processors (DSPs), combinations thereof or such other devices known to those having ordinary skill in the art.
- Each MS further includes at least one memory device 308 associated with processor 306, such as random access memory (RAM), dynamic random access memory (DRAM), and/or read only memory (ROM) or equivalents thereof, that store data and programs that may be executed by the processor and that allow the MS to perform all functions necessary to operate in communication system 100.
- RAM random access memory
- DRAM dynamic random access memory
- ROM read only memory
- User interface 302 provides a user of the MS with the capability of interacting with the MS, including inputting instructions into the MS.
- user interface 302 includes a display screen 304 and a keypad that includes multiple keys, including a Push-to-Talk (PTT) key, that may be used by a user of the MS to input instructions into the MS.
- display screen 304 comprises a touch screen that is able to determine a position (i.e., an X-coordinate and a Y-coordinate) of a user's touch on the touch screen and convey the position data to processor 306. Based on the position data, processor 306 then translates the user's touch into an instruction.
- display screen 304 may display a "keypad" screen that comprises multiple softkeys, such as softkeys corresponding to keys on a conventional cellular telephone keypad and further including a PTT softkey.
- the at least one memory device 308 maintains a mobile ID that is uniquely associated with the MS.
- the at least one memory device 308 further maintains a phone book comprising identifiers associated with MSs and/or talkgroups, such as mobile identifiers (mobile IDs) that are each uniquely associated with an MS and talkgroup identifiers (mobile IDs) that are each uniquely associated with a talkgroup, that may be engaged in a PTT communication session.
- the mobile IDs may be preprogrammed into the at least one memory device 308 or may be added to the at least one memory device by a user of the MS.
- the at least one memory device 308 may further store, in association with the talkgroup, a talkgroup ID and an associated list of mobile IDs, wherein each mobile ID in the list of mobile IDs corresponds to an MS that is a member of the talkgroup.
- Communication system 100 further maintains a 'wake up list' in association with each MS of the multiple MSs 102-104 included in the communication system.
- Each wake up list may be stored in the at least one memory device 308 of a corresponding MS or may be stored in infrastructure 150, and in particular in the at least one memory device 204 of Packet Data Control Switch 146.
- each wake up list comprises a list of mobile IDs associated with each MS that may be awakened by communication system 100 in response to receipt, by infrastructure 150, of a wake up request from the corresponding MS.
- each wake up list may comprise a list of talkgroup IDs associated with talkgroups whose members may be awakened by communication system 100 in response to receipt, by infrastructure 150, of a wake up request from the corresponding MS.
- each wake up list may comprise a list of a combination of mobile IDs and talkgroup IDs. When the wake up list is stored in infrastructure 150, the wake up list further comprises the mobile ID of the MS corresponding to the wake up list.
- communication system 100 is a Code Division Multiple Access
- CDMA Code Division Multiple Access
- GSM Global System for Mobile Communications
- UMTS Universal Mobile Telecommunication System
- TDMA Time Division Multiple Access
- FDMA Frequency Division Multiple Access
- OFDM Orthogonal Frequency Division Multiple Access
- a PTT call may be set up by any MS 102-104 in communication system 100 with any other MS or user, or any group of MSs or users, in the communication system.
- any PTT-capable MS 102-104 in communication system 100 may set up a PTT call with any other PTT-capable MS in the communication system.
- any member of a talkgroup such any one of MSs 102-104 with respect to talkgroup 105, may originate a PTT call with any one or more of the other members of the talkgroup.
- Logic flow diagram 400 begins (402) when a first, originating MS, such as MS 102, conveys (404) a 'wake up request' to infrastructure 150.
- the wake up request comprises a request to wake up at least a second MS, such as one or more of MSs 103 and 104, in communication system 100.
- Originating MS 102 conveys the wake up request to infrastructure 150 prior to a user of MS 102 conveying, to the infrastructure, a request to set up a Push-To-Talk (PTT) communication session.
- PTT Push-To-Talk
- originating MS 102 conveys the wake up request in response to receiving an indication from a user of the originating MS of the user's desire to initiate a PTT communication session.
- originating MS 102 may convey the wake up request in response to the user instructing MS 102 to open the phone book maintained in the at least one memory device 308 of the originating MS 102.
- originating MS 102 may convey the wake up request in response to receiving a power up instruction from the user of the MS, such as when a user of the MS opens a clamshell-design MS or depresses a power up key in user interface 302.
- infrastructure 150 In response to receiving (406) the wake up request, infrastructure 150, and in particular control switch 146, wakes up (408) at least one MS 103, 104 included in the wake up list associated with originating MS to produce at least one awakened MS.
- the MS may convey the wake up list to infrastructure 150 as part of the 'wake up request.
- the wake up request may include a mobile ID associated with originating MS 102 and may request that system 100 wake up all MSs associated with the 'wake up list' corresponding to the originating MS's mobile ID.
- step 408 may then comprise the following steps, hi response to receiving the wake up request, control switch 146 determines a location of each MS 103, 104 associated with the wake up list by reference to Location Database 142. Control switch 146 then instructs each BSS 120, 130 servicing an MS associated with the 'wake up list' to broadcast a paging message to the 'wake up list' MS(s) serviced by the BSS. In response to receiving the instruction from control switch 146, each BSS 120, 130 serving an MS associated with the wake up list broadcasts a paging message via a paging channel in a respective air interface 107, 108.
- Each paging message broadcast by a BSS 120, 130 identifies each MS that is associated with the wake up list and serviced by the BSS.
- the paging message may include the mobile IDs associated with each such MS.
- the wake up list comprises all members of a talkgroup, such as talkgroup 105
- the paging message may comprise a talkgroup ID associated with the talkgroup in addition to, or instead of, the mobile IDs.
- each MS 103, 104 determines that it is an intended recipient of the paging message, wakes up, and conveys a paging response back to control switch 146 indicating that the MS is awake.
- originating MS 102 may then instruct originating MS 102 to open the phone book comprising MSs and/or talkgroups that may be engaged in a PTT communication session.
- the instruction may be input into originating MS 102 concurrent with infrastructure 150 waking up the MSs 103, 104 associated with the wake up list.
- originating MS 102 retrieves the phone book from the one or more memory devices 308 of the MS and displays the phone book on display screen 304 of user interface 302.
- the user of originating MS 102 may then select one or more MSs and/or talkgroups from the displayed phone book and instructs MS 102, by depressing an appropriate key or touching an appropriate softkey in user interface 302 of the MS, to set up a PTT communication session with the selected one or more MSs and/or talkgroups.
- originating MS 102 conveys (410) a request, such as a call origination message, to infrastructure 150 to set up a PTT communication session with the selected one or more MSs and/or talkgroups.
- communication system 100 In response to receiving (412) the request to set up the PTT communication session, communication system 100 proceeds to set up (414) the requested PTT communication session.
- the procedure for setting up a PTT communication session is well-known in the art and will not be described in detail here, except that when the set up procedure engaged in by communication system 100 includes an MS 103, 104 that is associated with the wake up list, the communication system need not engage in a process of waking up the called MS as the called MS has already been awakened, or is in the process of being awakened, by infrastructure 150 in response to the receipt by the infrastructure of the wake up request. As a result, communication system 100 provides for an expedited set up of the PTT communication session.
- communication system 100 establishes a traffic channel in air interface 106 between originating MS 102 and infrastructure 150 for conveyance of voice traffic. Further, as part of the call setup procedure, infrastructure 150 further establishes a traffic channel between infrastructure 150 and each of the at least one awakened and called MS 103, 104 in a respective air interface 107, 108 associated with the MS.
- the user of originating MS 102 is then notified (416) that he or she may commence speaking.
- Logic flow diagram 400 then ends (418).
- originating MS notifies the user that he or she may commence speaking by playing a Talk Permit Tone (TPT) to the user of originating MS 102.
- TPT Talk Permit Tone
- infrastructure 150 in particular control switch 146
- infrastructure 150 in particular control switch 146
- originating MS 102 retrieves a digitally stored TPT from the at least one memory device 308 of the MS and converts the TPT to an audio signal that is then played to the user of the MS.
- the user of originating MS may then begin speaking by first depressing a PTT key, or touching a PTT softkey, of the MS's user interface 302.
- a 'wake up list' of MSs such as MSs 103 and 104, that may be awakened by communication system 100 prior to an originating MS requesting to set up the PTT communication session
- an amount of time incurred in setting up a PTT communication session and the delay before a user of the originating MS may begin to speak is reduced.
- the MSs on the 'wake up list' are awakened prior to an originating MS
- communication system 100 need not engage in a process of waking up such called MSs in response to the receipt by infrastructure 150 of the request to set up the PTT communication session.
- communication system 100 provides for an expedited set up of the PTT communication session. Since the setup delay and the time that the user may first begin speaking are important marketing features of a PTT communication system, any reduction of setup delay and time until a user may begin speaking increases the marketability of PTT services offered by an operator of a communication system, such as communication system 100.
- a logic flow diagram 500 is provided that illustrates an establishment of a Push-to-Talk (PTT) communication session in accordance with another embodiment of the present invention.
- Logic flow diagram 500 begins (502) when user of a first, originating MS, such as MS 102, depresses a PTT key or touches a PTT softkey of user interface 302 of the MS.
- MS 102 In response to the user depressing or touching the PTT key or softkey, MS 102 (504) conveys a request to the infrastructure to set up a PTT communication session and further reserves a floor of the communication session being set up until such a reservation is terminated, for example, when the user of MS 102 determines to relinquish the floor by releasing the PTT key or when infrastructure 100 terminates the user's reservation.
- each function performed by any one of MSs 102-104 is performed by a respective processor 306 of the MS.
- communication system 100 proceeds to set up the requested PTT communication session by allocating traffic channels in air interface in air interface 106 between originating MS 102 and infrastructure 150 for conveyance of voice traffic. Further, as part of the call setup procedure, infrastructure 150 pages each called MS, such as MS 103, that is, a 'callee.' Upon receiving a page response from a paged MS, that is, MS 103, infrastructure 150 further establishes a traffic channel between the infrastructure and the responding MS 103 in a corresponding air interface 107. When the setup of a PTT communication session with the called MS is complete, infrastructure 150 so informs originating MS 102, preferably by conveying a setup complete message to the MS.
- MS 103 that is, a 'callee.
- communication system 100 may permit the user of originating MS to begin speaking while the PTT call is being setup.
- MS 102 while the call setup is in progress (506), MS 102 notifies (508) the user that that he or she may commence speaking.
- MS 102 may notify the user that a call setup is in progress or MS 102 may merely notify the user that the user may begin talking, for example by playing a conventional notification such as a Talk Permit Tone (TPT).
- TPT Talk Permit Tone
- the notification may be stored in the at least one memory device 308 of MS 102 and is retrieved from the at least one memory device by the MS and played to the user.
- MS 102 Upon receiving the notification that he or she may begin talking, the user of originating MS 102 may then begin (510) speaking and may continue speaking until the user's reservation of the floor of the communication session is terminated (514), for example, by the user releasing the PTT key or softkey or by infrastructure 150 terminating the user's reservation of the floor.
- MS 102 stores (512) the user's speech in a speech buffer 310 included in the at least one memory device 308 of the MS.
- MS 102 determines (516) whether the call setup is complete.
- MS 102 determines that the setup is complete
- the MS notifies (518) the user of the MS that the call setup is complete, preferably by displaying an audio and/or visual cue, via user interface 302 of the MS, corresponding to a call setup complete message that is stored in the at least one memory device 308 of the MS.
- Infrastructure 150 further determines (520) whether the user of the called MS, that is, MS 103, is present and so informs MS 102.
- infrastructure 150 may determine whether the user of the called MS is present based on whether the called MS is registered in system 100, for example, by reference to Location Database 142 or by reference to a Presence Server (not shown) located in infrastructure 150 and coupled to IP network 140. In another embodiment of the present invention, infrastructure 150 may determine whether the user of called MS 103 is present based on whether the user of the called MS has answered the call.
- infrastructure 150 informs MS 102, and MS 102 notifies (522) the user of MS 102 of the presence of the called party, preferably by displaying an audio and/or visual cue that is stored in the in the at least one memory device 308 of MS 102 and displayed via user interface 302 of the MS.
- the speech stored in buffer 310 of MS 102 is then conveyed (524) by MS 102 to MS 103 and the communication session proceeds as a conventional PTT communication session, wherein the user of MS 102 may continue speaking (526) until MS 102's reservation of the floor of the communication session is terminated.
- Logic flow 500 then ends (554).
- MS 102 determines that the call setup is complete and, at step 520, infrastructure 150 determines that the user of the called MS, that is, MS 103, is not present, MS 102 notifies (528) the user of MS 102 that the called party is not present and prompts the user of MS 102 to leave a voice message for the called MS, such as one or more of a voice message comprising the speech stored in buffer 310 or a voice message comprising new speech.
- the notification and prompt are stored in the at least one memory device 308 of MS 102 and displayed by MS 102 via user interface 302 of the MS.
- the user may terminate (530) the call or may convey (532) any speech stored in buffer 310 of MS 102 or new speech as a voice message by selecting an appropriate icon, key, or softkey in user interface 302 of the MS.
- originating MS 102 conveys the speech stored in buffer 310 of MS
- originating MS 102 to a memory location in infrastructure 150 at is associated with MS 103, where the stored speech is recorded as a voice message for MS 103.
- originating MS 102 prompts the user of the originating MS for a new speech message via an audio and/or visual prompt that is stored in the at least one memory device 308 of originating MS 102 and is displayed on display screen 304 of user interface 302 of the MS.
- the user of originating MS 102 inputs into the MS, and the originating MS receives from the user, a new speech message.
- Originating MS 102 then conveys the new speech message to the memory location in infrastructure 150 at is associated with MS 103, where the stored speech is recorded as a voice message for MS 103.
- Logic flow 500 then ends (554).
- MS 102 determines that the call setup is not complete, and infrastructure 105 determines (534) that a predetermined time period has not yet expired and/or a predetermined number of unsuccessful attempts to set up the call have not yet occurred, such as a predetermined number of unsuccessful attempts to page called MS
- MS 103 or a predetermined number of unsuccessful attempts to establish traffic channels to called MS 103, communication system 100, and in particular originating MS 102, notifies
- Communication system 100 preferably originating MS 102 or control switch 146 via MS 102, also inquires (538) of the user of MS 102, via a text message or an icon displayed on display screen 304 of user interface 302 of MS 102 and that is stored in the at least one memory device 308 of the MS, as to whether to terminate and/or continue efforts to set up the call.
- originating MS 102 may receive (540), from the user of the MS, an instruction to terminate efforts to set up the call or to continue efforts to set up the call, or may receive no response, which may be interpreted as an instruction to continue to set up the call.
- step 540 When the user does not elect, at step 540, to terminate efforts to set up the call, that is, when the user elects to continue with efforts to set up the call or fails to elect to terminate efforts to set up the call, logic flow diagram 500 proceeds to step 516.
- MS 102 prompts (542) the user of MS 102 to leave a voice message, such as one of more of a voice message comprising the speech stored in buffer 310 of MS 102 or a voice message comprising new speech, for the called party.
- the prompt is stored in the at least one memory device 308 of MS 102 and displayed by MS 102 via user interface 302 of the MS.
- infrastructure 150 may terminate (546) the efforts to establish the call, for example, may cease paging called MS 103 or may cease attempting to establish traffic channels to the MS.
- infrastructure 150 informs MS 102 of a connection failure.
- MS 102 notifies (548) the user of the MS of the connection failure and prompts (550) the user to leave a voice message for the called party, such as a voice message comprising the speech stored in buffer 310 or a voice message comprising new speech.
- the notification and prompt are stored in the at least one memory device 308 of MS 102 and displayed by the MS via user interface 302 of the MS.
- the user of MS 102 may convey
- originating MS 102 conveys the speech stored in buffer 310 of MS 102 to a memory location in infrastructure 150 at is associated with MS 103, where the stored speech is recorded as a voice message for MS 103.
- originating MS 102 In response to receiving an instruction to convey a new speech message to the called MS as a voice mail message, originating MS 102 prompts the user of the originating MS for a new speech message via an audio and/or visual prompt that is stored in the at least one memory device 308 of originating MS 102 and is displayed on display screen 304 of user interface 302 of the MS.
- the user of originating MS 102 inputs into the MS, and MS 102 receives from the user, a new speech message. Originating MS 102 then conveys the new speech message to the memory location in infrastructure 150 that is associated with MS 103, where the stored speech is recorded as a voice message for MS 103.
- Logic flow 500 then ends (554).
- communication system 100 the user of originating MS might not begin speaking until the PTT call is setup.
- infrastructure 150 determines (520) whether the user *of the called MS, such as MS 103, is present and so informs MS 102.
- logic flow diagram 500 then proceeds to step 522 as is described above.
- logic flow diagram 500 then proceeds to step 528 as is described above.
- a delay between a time that the user of the originating MS determines to initiate a PTT phone call and the time that the user may then begin to speak is reduced. Since the user may be permitted to begin speaking prior to completion of the setup of the call, the speech input by the user into originating MS 102 is stored in a buffer 310 of the MS. When the call is setup and the user of the called MS, such as MS 103, is present, the stored speech is then conveyed to the called MS.
- the stored speech may be conveyed to called MS 103, decompressed, and played out with minimal disruption to the subsequent conversation. If attempts to set up the call are unsuccessful and the call is not set up or the call is set up but the user of called MS 103 is not present or determines to not accept the call, the stored speech may then be conveyed to the called MS as a voice message.
- the stored speech, or new speech may also be used as an alert that is played to a user of a called MS. That is, typically, when a called MS, such as MS 103 or MS 104, is woken up by infrastructure 150 and a traffic channel is established to the called MS as part of a PTT communication session, a "beep" or a "chirp” is played by the called MS to a user of the called MS.
- a called MS 103, 104 is woken up by infrastructure 150 and a traffic channel is established to the called MS, an announcement comprising a spoken message from originating MS 102 may be conveyed to a user of the called MS.
- an announcement comprising a spoken message from the originating MS to a user of the called MS, can choose to ignore the call, queue the call without listening to the audio message, queue the call after listening to the audio message, or answer the call.
- FIG. 6 is a logic flow diagram 600 of a method executed by communication system 100 in conveying a voice alert to a called MS in accordance with another embodiment of the present invention. Similar to logic flow diagram 500, logic flow diagram 600 begins when user of a first, originating MS, such as MS 102, depresses a PTT key or touches a PTT softkey of user interface 302 of the MS.
- a first, originating MS such as MS 102
- MS 102 In response to the user depressing or touching the PTT key or softkey, MS 102 (604) conveys a request to the infrastructure to set up a PTT session and further reserves a floor of the communication session being set up until the floor reservation is terminated, for example, when the user of MS 102 determines to relinquish the floor by releasing the PTT key or when infrastructure 100 terminates the user's reservation.
- communication system 100 proceeds to set up the requested PTT communication session by allocating traffic channels in air interface in air interface 106 between originating MS 102 and infrastructure 150 for conveyance of voice traffic. Further, as part of the call setup procedure, infrastructure 150 pages each called MS, such as MS 103, that is, a 'callee,' and upon receiving a page response from the MS, further establishes a traffic channel between infrastructure 150 and the responding MS 103 in a corresponding air interface 107. When the setup of a PTT communication session with the called MS is complete, infrastructure 150 so informs originating MS 102, preferably by conveying a setup complete message to the MS.
- MS 103 that is, a 'callee,'
- communication system 100 may permit the user of originating MS to begin speaking while the PTT call is being setup.
- MS 102 while the call setup is in progress (606), MS 102 notifies (608) the user that that he or she may commence speaking.
- the user of originating MS may then begin (610) speaking and may continue speaking until the user's reservation of the floor of the communication session is terminated (614), for example, by the user releasing the PTT key or softkey or by infrastructure 150 terminating the user's reservation of the floor.
- MS 102 stores (612) the user's speech in a speech buffer 310 included in the at least one memory device 308 of the MS.
- MS 102 determines (616) whether the call setup is complete.
- MS 102 determines that the setup is complete, the MS notifies (618) the user of the MS that the call setup is complete, preferably by displaying an audio and/or visual cue, via user interface 302 of the MS, corresponding to a call setup complete message that is stored in the at least one memory device 308 of the MS.
- Infrastructure 150 further determines (620) whether the user of the called MS, such as MS 103, is present and so informs MS 102.
- infrastructure 150 determines that the PTT communication session is set up and further determines, at step 620, that the user of called MS 103 is present, MS 102 conveys (622) the speech stored in buffer 310 to MS 103, and called MS
- MS 103 plays (624) the received speech to the user of MS 103 as an announcement, that is, as an alert.
- the user of MS 103 may choose to ignore the call, queue the call without listening to the audio message, queue the call after listening to the audio message, or answer the call.
- MS 103 then conveys (626) the user's response to the alert to originating MS 102 via infrastructure 150 and logic flow 600 ends (660).
- MS 102 notifies (628) the user of the MS that the callee is not present and that the alert has been successfully sent, and logic flow 600 ends (660).
- MS 102 When, at step 616, infrastructure 150 determines that the PTT communication session is not set up, MS 102 notifies (630) the user of MS 102 that a call setup is in progress.
- attempts to complete the call are terminated (632) prior to the call being setup, for example, upon expiration of a predetermined time period or after a predetermined number of unsuccessful setup attempts, the user of originating MS 102 is notified (634) that an alert has been successfully sent to called MS 103 and logic flow 600 ends (660).
- the speech stored in buffer 310 is conveyed (636) to called MS 103, and called MS 103 plays (638) the received speech to the user of MS 103 as an announcement, that is, an alert.
- MS 103 may choose to ignore the call, queue the call without listening to the audio message, queue the call after listening to the audio message, or answer the call.
- MS 103 then conveys (640) the user's response to the alert to originating MS 102 via infrastructure 150 and logic flow 600 the ends (660).
- the user of originating MS 102 might not begin speaking until the call is set up.
- infrastructure 150 determines (642) whether the user of the called MS, such as MS 103, is present and so informs MS 102.
- MS 102 When, at step 606, the PTT communication session is set up and the user of the called MS is present, MS 102 notifies (646, 648) the user of MS 102 that the user of called MS 103 is present and that he or she may commence speaking. Upon receiving the notification that he or she may begin talking, the user of originating MS 102 may then begin (650) speaking. MS 102 conveys (652) the speech input into MS 102 by the user of the MS to called MS 103, and called MS 103 plays (654) the received speech to the user of MS 103 as an announcement, that is, an alert.
- MS 103 may choose to ignore the call, queue the call without listening to the audio message, queue the call after listening to the audio message, or answer the call.
- MS 103 then conveys (656) the user's response to the alert to originating MS 102 via infrastructure 150 and logic flow 600 ends (660).
- the user of the called MS is provided information that allows the user to determine whether to ignore the call, queue the call without listening to the audio message, queue the call after listening to the audio message, or answer the call.
- a user of the called MS is provided greater information on which to make a decision as to whether to accept a call and further whether to incur the costs associated with engaging in a wireless communication via a mobile station, which costs may be billed based on an amount of airtime consumed by the user.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0418243-0A BRPI0418243A (en) | 2003-12-31 | 2004-12-22 | method for establishing a push-to-talk (ptt) communication session on a wireless communication system, control switch, and mobile station |
EP04815570A EP1702057A2 (en) | 2003-12-31 | 2004-12-22 | Method and apparatus for providing push-to-talk services in a cellular communication system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53384203P | 2003-12-31 | 2003-12-31 | |
US60/533,842 | 2003-12-31 | ||
US11/002,767 US20050143056A1 (en) | 2003-12-31 | 2004-12-02 | Method and apparatus for providing push-to-talk services in a cellular communication system |
US11/002,767 | 2004-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005065287A2 true WO2005065287A2 (en) | 2005-07-21 |
WO2005065287A3 WO2005065287A3 (en) | 2009-03-19 |
Family
ID=34703534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/043510 WO2005065287A2 (en) | 2003-12-31 | 2004-12-22 | Method and apparatus for providing push-to-talk services in a cellular communication system |
Country Status (4)
Country | Link |
---|---|
US (2) | US20050143056A1 (en) |
EP (1) | EP1702057A2 (en) |
BR (1) | BRPI0418243A (en) |
WO (1) | WO2005065287A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1681882B1 (en) * | 2005-01-12 | 2017-03-15 | NEC Corporation | Commmunication method and communication system to enable sending a message during a Push-To-Talk connection |
Families Citing this family (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8571584B1 (en) | 2003-04-03 | 2013-10-29 | Smith Micro Software, Inc. | Delivery of voice data from multimedia messaging service messages |
GB0319360D0 (en) * | 2003-08-18 | 2003-09-17 | Nokia Corp | Setting up communication sessions |
US20090286515A1 (en) * | 2003-09-12 | 2009-11-19 | Core Mobility, Inc. | Messaging systems and methods |
US20050164681A1 (en) * | 2004-01-22 | 2005-07-28 | Jenkins William W. | Voice message storage in a push-to-talk communication system |
KR20050114556A (en) * | 2004-06-01 | 2005-12-06 | 삼성전자주식회사 | Apparatus and method of setting up talk session in ptt service providing system |
KR100640324B1 (en) * | 2004-08-19 | 2006-10-30 | 삼성전자주식회사 | Method of group call service using push to talk scheme in mobile communication terminal |
JP2006094341A (en) * | 2004-09-27 | 2006-04-06 | Toshiba Corp | Mobile communications terminal equipment and its intermittent receiving method |
JP2006101048A (en) * | 2004-09-29 | 2006-04-13 | Nec Corp | Ptt communication system, portable terminal device, and conversation start method used for them and program thereof |
KR100724872B1 (en) * | 2004-12-06 | 2007-06-04 | 삼성전자주식회사 | Method for processing the information of conversation in wireless terminal |
KR101085704B1 (en) * | 2005-01-21 | 2011-11-23 | 삼성전자주식회사 | Method and apparatus for managing right to speak of user in push-to-talk over cellular |
US8010143B2 (en) * | 2005-01-28 | 2011-08-30 | Qualcomm Incorporated | Method and apparatus for implicit floor control in push-to-talk over cellular systems |
US20060211383A1 (en) * | 2005-03-18 | 2006-09-21 | Schwenke Derek L | Push-to-talk wireless telephony |
US7925290B2 (en) * | 2005-03-31 | 2011-04-12 | Qualcomm Incorporated | System and method for efficiently providing high-performance dispatch services in a wireless system |
US8279868B2 (en) * | 2005-05-17 | 2012-10-02 | Pine Valley Investments, Inc. | System providing land mobile radio content using a cellular data network |
US8145262B2 (en) * | 2005-05-17 | 2012-03-27 | Pine Valley Investments, Inc. | Multimode land mobile radio |
US7577455B2 (en) * | 2005-05-25 | 2009-08-18 | Palo Alto Research Center Incorporated | Three turn interactive voice messaging system |
US20060270429A1 (en) * | 2005-05-25 | 2006-11-30 | Palo Alto Research Center Incorporated | Three turn interactive voice messaging method |
EP1905256B1 (en) * | 2005-07-15 | 2013-05-15 | Research In Motion Limited | Methods and apparatus for providing ptt data buffering support indications from mobile devices and ptt data buffering control by wireless networks |
US8041376B2 (en) * | 2005-07-15 | 2011-10-18 | Research In Motion Limited | Methods and apparatus for providing PTT data buffering support indications from mobile devices and PTT data buffering control by wireless networks |
JP2007036876A (en) * | 2005-07-28 | 2007-02-08 | Kyocera Corp | Communication method, communication system and communication terminal |
DE102005037569B4 (en) * | 2005-08-09 | 2011-03-03 | Infineon Technologies Ag | Method for assigning a communication right, communication conference session server and communication conference session server arrangement |
KR100677489B1 (en) | 2005-09-02 | 2007-02-02 | 엘지전자 주식회사 | Ptt call reception method for mobile telecommunication terminal equipment |
US7529558B1 (en) * | 2005-10-11 | 2009-05-05 | Avaya Technology Corp. | System and method for location based push-to-talk |
US7729713B1 (en) * | 2005-10-17 | 2010-06-01 | At&T Mobility Ii Llc | Methods for providing mobile PTT communications without requiring PTT servers |
ATE534264T1 (en) | 2005-12-14 | 2011-12-15 | Research In Motion Ltd | METHOD AND DEVICE FOR TERMINAL-BASED RADIO CONTROL IN A UMTS NETWORK |
US8868685B2 (en) * | 2006-02-13 | 2014-10-21 | Qualcomm Incorporate | System and method for providing an early notification when paging a wireless device |
US8200236B2 (en) * | 2006-02-27 | 2012-06-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for triggering a state change for a communication device |
JP4749217B2 (en) * | 2006-04-27 | 2011-08-17 | 京セラ株式会社 | Group call notification method and mobile station |
EP2363981B1 (en) * | 2006-05-17 | 2017-08-02 | BlackBerry Limited | Method and system for signaling release cause indication in a UMTS network |
US8265034B2 (en) * | 2006-05-17 | 2012-09-11 | Research In Motion Limited | Method and system for a signaling connection release indication |
US8194682B2 (en) | 2006-08-07 | 2012-06-05 | Pine Valley Investments, Inc. | Multiple protocol land mobile radio system |
WO2008028315A1 (en) * | 2006-08-24 | 2008-03-13 | Zte Corporation | A fast accessing method in group communication |
US20080049662A1 (en) * | 2006-08-25 | 2008-02-28 | Research In Motion Limited | Apparatus, and associated method, for releasing a data-service radio resource allocated to a data-service-capable mobile node |
US9319225B2 (en) * | 2007-01-16 | 2016-04-19 | Microsoft Technology Licensing, Llc | Remote device waking using a multicast packet |
US8090380B2 (en) | 2007-02-12 | 2012-01-03 | Research In Motion Limited | Method and apparatus for radio resource control profile creation in a UMTS network |
KR101458634B1 (en) * | 2007-04-06 | 2014-11-12 | 삼성전자주식회사 | METHOD OF MANAGING PRE-ESTABLISHED SESSION AND PoC SYSTEM AND PoC TERMINAL FOR IMPLEMENTING THE METHOD |
US8548433B1 (en) * | 2007-06-27 | 2013-10-01 | Smith Micro Software, Inc. | Voice messaging service for network-based instant connect systems |
US7917131B2 (en) * | 2007-09-20 | 2011-03-29 | Motorola Solutions, Inc. | System and method for minimizing undesired audio in a communication system utilizing distributed signaling |
ES2385415T3 (en) * | 2007-11-13 | 2012-07-24 | Research In Motion Limited | Method and apparatus for state / mode transition |
BRPI0921356B1 (en) * | 2008-11-10 | 2020-10-13 | Blackberry Limited | method for sending a fast dormancy indication and user equipment |
US8427996B2 (en) * | 2008-12-29 | 2013-04-23 | Motorola Solutions, Inc. | Method for selecting a channel in a multi-channel communication system |
US8406168B2 (en) * | 2009-03-13 | 2013-03-26 | Harris Corporation | Asymmetric broadband data radio network |
CA3038940C (en) * | 2009-11-23 | 2021-04-27 | Blackberry Limited | Method and apparatus for state/mode transitioning |
WO2011061352A1 (en) | 2009-11-23 | 2011-05-26 | Research In Motion Limited | Method and apparatus for state/mode transitioning |
HUE049498T2 (en) | 2009-11-23 | 2020-09-28 | Blackberry Ltd | State or mode transition triggering based on signalling connection release indication, scri, message transmission |
AU2010323195A1 (en) * | 2009-11-24 | 2012-06-28 | Blackberry Limited | Method and apparatus for state/mode transitioning |
US8983532B2 (en) * | 2009-12-30 | 2015-03-17 | Blackberry Limited | Method and system for a wireless communication device to adopt varied functionalities based on different communication systems by specific protocol messages |
US20110182281A1 (en) * | 2010-01-25 | 2011-07-28 | Gibran Siddique | Facilitating verification of call leg setup in third party call control systems |
JP5551275B2 (en) * | 2010-02-10 | 2014-07-16 | ブラックベリー リミテッド | Method and apparatus for status / mode transmission |
CN103314634A (en) | 2011-11-11 | 2013-09-18 | 捷讯研究有限公司 | Method and apparatus for user equipment state transition |
CN103843373B (en) * | 2012-12-26 | 2018-06-05 | 华为技术有限公司 | PTT communication means, server, terminal and system |
US8983505B1 (en) * | 2013-01-24 | 2015-03-17 | Sprint Spectrum L.P. | Providing a message notification in a wireless communication system |
US9281890B2 (en) * | 2013-03-15 | 2016-03-08 | Inaccess Networks S.A. | System and method for conveying aeronautical radio voice and signaling over a satellite IP network |
US10070274B2 (en) * | 2016-11-30 | 2018-09-04 | Motorola Solutions, Inc. | Methods and systems for controlling communication devices affiliated with talk groups |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030148779A1 (en) * | 2001-04-30 | 2003-08-07 | Winphoria Networks, Inc. | System and method of expediting call establishment in mobile communications |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4821310A (en) * | 1987-12-22 | 1989-04-11 | Motorola, Inc. | Transmission trunked radio system with voice buffering and off-line dialing |
US5711011A (en) * | 1996-06-04 | 1998-01-20 | Motorola, Inc. | Method for providing voice mail service in a dispatch radio communication system and corresponding dispatch system |
US6097963A (en) * | 1997-11-18 | 2000-08-01 | Ericsson Inc. | Method of providing a multiple mobile subscriber access group in a radio telecommunications network |
US20030119536A1 (en) * | 2001-12-21 | 2003-06-26 | Hutchison James A. | Arbitrated audio communication with reduced latency |
US6865398B2 (en) * | 2002-02-04 | 2005-03-08 | Sprint Spectrum L.P. | Method and system for selectively reducing call-setup latency through management of paging frequency and buffering of user speech in a wireless mobile station |
-
2004
- 2004-12-02 US US11/002,767 patent/US20050143056A1/en not_active Abandoned
- 2004-12-22 BR BRPI0418243-0A patent/BRPI0418243A/en not_active IP Right Cessation
- 2004-12-22 WO PCT/US2004/043510 patent/WO2005065287A2/en not_active Application Discontinuation
- 2004-12-22 EP EP04815570A patent/EP1702057A2/en not_active Withdrawn
-
2005
- 2005-11-14 US US11/273,694 patent/US7783315B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030148779A1 (en) * | 2001-04-30 | 2003-08-07 | Winphoria Networks, Inc. | System and method of expediting call establishment in mobile communications |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1681882B1 (en) * | 2005-01-12 | 2017-03-15 | NEC Corporation | Commmunication method and communication system to enable sending a message during a Push-To-Talk connection |
Also Published As
Publication number | Publication date |
---|---|
WO2005065287A3 (en) | 2009-03-19 |
EP1702057A2 (en) | 2006-09-20 |
US20060063553A1 (en) | 2006-03-23 |
US20050143056A1 (en) | 2005-06-30 |
BRPI0418243A (en) | 2007-04-17 |
US7783315B2 (en) | 2010-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7783315B2 (en) | Method and apparatus for providing push-to-talk services in a cellular communication system | |
RU2369043C2 (en) | Method and device for efficient paging and registration in radiocommunication system | |
JP4829244B2 (en) | Presence management in packet-switched networks using circuit-switched USSD signaling | |
KR100605247B1 (en) | System and method of expediting call establishment in mobile communication | |
EP1815649B1 (en) | Ussd-facilitated call setup for push to talk over cellular (poc) services | |
US20060040695A1 (en) | Method of group call service using push to talk scheme in mobile communication terminal | |
JP5096140B2 (en) | Asynchronous signaling and data distribution in wireless communication systems | |
US20030157945A1 (en) | Method and apparatus for delivering server-originated information during a dormant packet data session | |
US20040203793A1 (en) | Method and apparatus for providing a dispatch call | |
US8867412B1 (en) | System and method for seamlessly switching a half-duplex session to a full-duplex session | |
US20050265350A1 (en) | Concurrent packet data session set-up for push-to-talk over cellular | |
TW200304295A (en) | A server for joining a user to a group call in a group communication network | |
JP2008535405A (en) | System and method for efficiently providing high-performance dispatch service in a wireless system | |
EP1626592B1 (en) | Voice call connection method during push-to-talk call in a mobile communication system | |
KR20050072747A (en) | Method and apparatus for supporting location-based group communications | |
KR20020071111A (en) | Method for multimedia broadcasting service using traffic channel in wireless communication system | |
US20080032728A1 (en) | Systems, methods and devices for communicating among multiple users | |
KR100640439B1 (en) | Method of communication using push to talk scheme in mobile communication system | |
KR100630115B1 (en) | Mobile communication system using push to talk scheme | |
CN101422057A (en) | Method and apparatus for providing push-to-talk services in a cellular communication system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200480039275.0 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1571/KOLNP/2006 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004815570 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2004815570 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: PI0418243 Country of ref document: BR |