638 results about "Call establishment" patented technology

A triggering method for IP multimedia service control. The triggering method comprises examining a SIP response message received by a S-CSCF according to a set of response Filter Criteria (rFC), and subsequently recording a corresponding SIP request message and re-issuing the SIP request message to an application server designated by the rFC if the SIP response message matches the Service Point Triggers (SPTs) of the rFC. The S-CSCF examines the SPTs of the rFC one by one according to their indicated priority. The rFC scheme is useful when the application servers are triggered according to the SIP response message, and is compatible with the iFC scheme. The rFC scheme of the present invention improves the efficiency for call establishment as well as improving the flexibility of the S-CSCF.

In a communications network, voice and facsimile calls are established between first and second and second terminals via first and second media gateways in a communications network. Each gateway is capable of autonomous transitioning between a voice over IP (VoIP) call mpde and a facsimile ov er IP (FoIP) call mode. A bearer path for the call is established via a media gateway controller. During call setup, the media gateways exchange confirmation of each gateway's capability to perform autonomous transitioning between VoIP and FoIP call modes. The call is established as a VoIP call, and, on a determination by the media gateways that a facsimile call is required, each media gateway autonomously transitions between its VoIP and FoIP call modes without the intervention of the media gateway controller.

A communication device establishes a connection in a congested wireless communications network environment by systematically reducing a probability of attempting to connect to a strongest, but overly-congested, cell. A transceiver of the communications device attempts at least one first Random Access Channel (RACH) procedure with a first cell that is currently designated as a serving cell. A RACH controller of the communications device detects a failure to successfully connect to the first cell via the at least one first RACH procedure, autonomously determines, based at least on a probability value, which is greater than 0% and less than 100%, whether to de-prioritize the first cell for a period of time, and, in response to determining to de-prioritize the first cell, reduces a priority value assigned at the UE to the first cell for cell selection / reselection, and assigns a selected time period during which the priority value remains reduced.

An improved access attempt procedure for call establishment is achieved by deriving a probability of access transmission as a function of both a priority level for access attempts and a random access cause, and performing link establishment authentication and security control call establishment based upon the deriving.

A method for establishing an emergency call between a user equipment within a radio coverage area and one of at least two points able to answer the call, the method comprising: receiving said emergency call request; determining a first estimate of the position of said user equipment within said coverage area; interrupting said call establishment by triggering a control point; and using the control point to select, based on said first position estimate, which one of said at least two answering points the call is established with.

The invention relates to the field of wireless communication, and discloses a multi-mode wireless terminal and a method for initiating a circuit-domain voice service by the same. The method disclosed by the invention comprises the following steps that when a first communication mode is in a data service connected state and a second communication mode is in an idle state, the first communication mode monopolizes a first antenna group, the first communication mode and the second communication mode share a second antenna group, and the second communication mode maintains the cell information by the second antenna group; when the second communication mode initiates the voice service, the second antenna group is monopolized by the second communication mode instead of being shared by the first communication mode and the second communication mode; the data service of the first communication mode is kept. According to the multi-mode wireless terminal and the method disclosed by the invention, the time delay for the voice service call establishment of the wireless terminal during the falling-back of a circuit domain is shortened, the first communication mode can be rapidly returned after the voice service is finished, and the concurrence of the voice service and the data service can still be supported after the circuit domain falls back to the second communication mode.

The invention discloses a system and method for realizing broad and narrow band resource dynamic allocation based on a narrow band air interface, and belongs to the technical field of trunking communication. The invention aims to solve the problems that in the exiting implementation method of broad and narrow access fusing service, when a PDT air interface short message carries control information, the response speed of call establishment is low, and the utilization ratio of broad band resources is low. The system comprises a fused base station and a terminal, wherein the fused base station and the terminal perform information interaction in a wireless mode; the fused base station comprises a trunked base station controller, a plurality of PDT base station channel units and a broad band service unit. The method comprises the stages of call establishment, call process control and clearing control; the broad band service unit is added to the original PDT base station; the signaling interaction of broad and narrow services is performed through PDT air interface signaling extension; then broad and narrow resource dynamic allocation is realized. The system is applied to broad and narrow resource dynamic allocation.

In a communication network, every subscriber has among all the calls he originates one or more call groups he frequently calls. To avoid repetitive call processing, the network allows for a more efficient call processing using the routing information of a previous call to the same subscriber. This allows a network element such as a switch to use existing routing information for the next same call instead of determining the routing information each time anew. The network and a method implemented therein identify the one or more call groups, store the routing information for these call groups, and use the stored routing information for the next same-call establishment.

Disclosed are an apparatus for and a method of managing the location of a packet call in the wireless environment of a wireless packet data system. A dormant-state mobile station management is carried out by registering call information in a dormant state database in response to an initial request for a packet data service, registering dormant state information in a pointer lookup table, and updating location information of a mobile station entering a dormant state, based on the dormant state information, in response to a message received from the mobile station, or resuming the packet data service. In accordance with the invention, it is possible to reduce the connection time and load required to resume a call establishment associated with the mobile station maintained in a dormant state.

The present invention relates to a method for transmitting information to a subscriber in a telephone system in connection with call establishment. In order to achieve more efficient transmission of information between the parties participating in the call establishment, a message designated for a predetermined subscriber or a group of subscribers is stored in a memory means, whereby in connection with the call establishment another party to the call establishment is identified, the message designated for the identified party is retrieved from the memory means, and said message is sent to the identified party in connection with the call establishment.

A method of authenticating an authorized entity via the telephone network is disclosed. A telephone call is placed from a telecommunications terminal to a server that comprises a valuable resource and that only provides the resource to authorized entities. When the terminal has already demonstrated its authorization to the server, the server indicates to the terminal that the terminal need not provide its authorization credentials. In contrast, when the terminal has not yet demonstrated its authorization to the server, the server indicates to the terminal that the terminal does need to provide its authorization credentials. The server indicates to the terminal whether or not it needs to provide its authorization credentials by deliberating waiting to establish the call with the terminal, wherein in the length of the wait is indicative of whether or not the terminal needs to provide its authorization credentials.

In a switched circuit telephone network implementing an SS7 protocol with out-of-band signaling for call establishment, the specification discloses a proxy load balancer coupled between a signaling gateway and application server processes running application services. The proxy load balancer receives signaling messages from the signaling gateway directed to an application server process running an application service, and forwards that signaling message to one of two or more application server processes, each running the application service. In this way, additional application server processes may be installed in the system without reconfiguration or even knowledge of the signaling gateway. The proxy load balancer appears as a single application server process running an application service to the signaling gateway, and correspondingly appears as a signaling gateway to the two or more application server processes running application services downstream of the proxy load balancer.

In a SIP network, SIP servers are provisioned with information used to authenticate subscribers and entities that will be placing calls. This information can be used during call establishment to allow or deny calls, as well as to determine the appropriate party to bill if the call involves a charge, such as a long distance charge. In addition to allowing calls between authenticated and trusted entities, there is a need for the SIP server to allow certain kinds of calls that involve non-trusted users or entities. If non-trusted entities where not recognized, trusted users and entities within the SIP network would not be able to receive calls from users or entities not know to the SIP server that is providing them services.

The invention discloses a method, a device and a system for realizing redirection in a communication system. The method mainly comprises the following steps: firstly, a page message aiming at user terminal is sent to the first network and the second network respectively, and the page message gets to a second network before the user terminal is put in the second network; after the user terminal receives page message through the first network, and determines that the page message is required to be redirected to the second network, the user terminal is reconnected into the second network, and answers to the page message issued by the second network. Therefore, the realization of the embodiment of the invention ensures that the time for cell reselection process and paging response process are minimized, and then the time delay of the entire call establishment process is reduced, and the service continuity in a coexisting network is ensured.

The invention discloses a call establishment method of a number portability user to be called, an I-CSCF (interrogating call session control function) and an IMS (IP multimedia subsystem) and relates to the technical field of number portability. The call establishment method comprises the following steps that a calling which is started for the number portability user is routed into the I-CSCF in the IMS domain with which the number portability user signs a contract for the first time; the I-CSCF acquires a new public user identity from an HSS (home subscriber server) in the IMS domain with which the number portability user signs the contract for the first time; the new public user identity is identified to be the public user identity which is distributed for the number portability user through an IMS domain to which the number portability user transfers; and the I-CSCF uses the new public user identity to establish a call of a calling party on the number portability user. The call establishment method of the number portability user to be called, the I-CSCF and the IMS provide a call service of the user to be called when the user performs number portability.

This invention relates to a quick setting-up method for calls of a TD-SCDMA cluster communication system applying a mode of dynamic distribution and competition, in which, the network side sets up multi-call service channels for all legal local areas and initiates a multi-call broadcast message at the beginning of initiating multi-call, a called UE decides if it sends a feedback response message according to its grade and if the network side needs feeding back a message, and the multi-call service channels and empty resources of the un-activated regions will be released.

The invention discloses a trunking communication method, a device and a system. According to the method, a multi-point service function entity receives a group call establishing request sent by a trunking control server; according to the received group call establishing request, the multi-point service function entity initiates a group call process through a mobile management entity to trigger establishment of multicast bearing; after accomplishing establishment of multicast bearing, the multi-point service function entity returns a group call establishment response to the trunking control server. Through the method, group communication business based on EPC can be realized.

The invention discloses a pseudo base station discovery method and system, and relates to the field of wireless communication. According to an embodiment, big data analysis is performed on user call data through acquisition of the user call data which comprises one kind of information of a call establishment characteristic information, service quality-related information, call process behavior information, call release-related information and off-networking information, and a pseudo base station is discovered rapidly according to abnormal characteristic information, reflected in the user call data, of a terminal when the pseudo base station works. And a fixed pseudo base station can be discovered, and a moving pseudo base station can also be discovered.

This invention provides a method, system and apparatus for allowing media context sensitive SIP signaling exchange (such as voice) and call establishment while denying or challenging any other session description protocol (“SDP”) extension dialogs which might not be desired (such as instant messaging, video, Web broadcasting or pushing, data and / or application sharing and the like) by a user. The method and apparatus may further include defining user client media policy preferences, the user media policy preferences establishing the parameters for evaluating a media session request received by a user client, and providing the user client media policy preferences to a policy enforcement point device, the policy enforcement point device evaluating the media session request received by the user client and applying the user client media policy preferences to the media session request. The method and apparatus may further include utilizing a user client portal to gain access to a media policy database, the media policy database providing storage for user client media policy preferences.

In situations in which one or both parties of a call cannot speak on a telephone, a voice call establishment request (5-0) from an calling terminal (A) to a called terminal (B) is processed as follows. The called terminal (B) is alerted and a two-way connection (5-14; 5-24 . . . 5-28) is established between the calling terminal (A) and the called terminal (B). In response to determining (3-10; 3-14; 5-8) that a two-way voice call between the calling terminal (A) and the called terminal (B) is not allowed; a mode server (MS, MS′) receives silent messages (5-14; 5-24) via a user interface (UI) of the called terminal (B) and conveys (5-14; 5-26 . . . 5-28) information based on said silent messages to the calling terminal (A).

The invention provides a method and a system for selectively delivering information to callers in an AIN environment. In accordance with the method the service switching point to which is connected the terminal equipment of the caller monitors the condition of the telephone line to detect an AIN trigger, such as an off-hook event among other possibilities. When such event occurs, the service switch point formulates a message query. The query is routed to a service control point via one or more service transfer points, that holds knowledge of the service subscribed by the caller and the information to be displayed for this service. The service control point analyzes the request and assembles the appropriate response. That response is then returned to the service switch point that formats it properly and delivers it to the terminal equipment of the caller. In one embodiment the information delivery is effected during call establishment. In a variant, information is delivered while no call is being attempted.

A method and apparatus in a H.323 based network to effect messaging from a message server to a calling subscriber prior to or during a usual call establishment. The calling subscriber sends a SETUP message to an associated Gatekeeper to request a call set-up. On receiving the request, the Gatekeeper searches a stored caller service profile for information regarding the messaging service. If the search is successful, the gatekeeper sends, on basis of the caller service profile information contents, a SETUP message to the message server, and the transfer of the message from the message server to the caller is effected. The originally requested call set-up is then completed according to known H.323 call set-up procedures.

The invention provides an implementation method and system of a broadband digital cluster service, a cluster dispatching management center, a BM-SC, an MBMS-GW, an MME, an MCE, a base station, user equipment and a network side device. The implementation method of the broadband digital cluster service comprises the steps that (1) the cluster dispatching management center receives a cluster call establishment request; (2) the cluster dispatching management center sends a created cluster bearing request carrying calling information and a transmission bearing address to a network side according to the cluster call establishment request. Compared with a solution of a private network cluster communication system which is built on the basis of the second generation mobile communication technology, according to the technical scheme, the requirement for the broadband of the cluster service can be effectively met, and transmission efficiency is improved. In addition, the utilization rate of frequency resources can be improved, and application of a cluster communication service is expanded from a traditional private network to a mobile public network.

An IP-based group communication feature in a mobile communication network is based on the pre-established logical connections established between a gateway node (GGSN) and members of a group in the mobile communication network. No separate call establishment procedures using VoIP signaling are used for connecting a user equipment (UE) logically to group(s), but the procedure is preferably based on the normal logical connection establishment signaling (e.g. PDP context creation) as used for data service. The UE implements a host supporting the IP multicasting, and the next IP layer peer for the UE host is located in the gateway node. The gateway node provides an IP interface towards an external multicast router so that the UE host looks like a normal IP host supporting IP multicasting. The IP-based voice traffic is mapped and transferred over pre-established connections between the gateway and the UEs of the specific group.

The embodiment of the invention discloses a method for implementing group calling end-to-end encryption for mobile cluster comprising: transmitting session key request to calling encryption module, the session key request carrying group ID of group calling; receiving the session key of group key encryption corresponding to the group ID returned by the encryption module; transmitting the encrypted session key to called mobile station. In the embodiment, end-to-end encryption cluster group calling can be still performed under single station cluster mode or KMC failure or end-to-end encryption application context of through mode; KMC is not needed to participate in session key generation and distribution in end-to-end encryption group calling, which largely reduces load of KMC and calling establishment time delay of end-to-end encryption of cluster group calling.

A mechanism for controlling an establishment of a call from a calling party being located in a first communication network environment to a receiving party being located in a second network environment, comprise a determination whether or not information on media parameters supported by the calling party is received in an initialization message for the call, and if the information on media parameters supported by the calling party is not received, a transmission of a specific message based on a service change and fallback function to the receiving party, a receipt, in response to the specific message based on the service change and fallback function, of information on media parameters supported by the receiving party, processing of the information on media parameters supported by the receiving party and a completion of the establishment of the call in correspondence to the media parameters supported by the receiving party and by the calling party.

The invention discloses a method, a system and a mobile terminal for encrypting a voice call. The method comprises the following steps of: when a calling mobile terminal carries out an encrypted call, informing an encryption identification for indicating encryption to a mobile switching center in a call establishment process; informing the encryption identification and a key subjected to encryption i.e. an encryption key to a called mobile terminal by the mobile switching center; and judging the received encryption identification by the called mobile terminal, then decrypting the encryption key, and carrying out an encrypted voice call with the calling mobile terminal. In the invention, the mobile terminals can freely select whether to encrypt the call process, and the mobile switching center encrypts the key in the process of transmitting the key, which can improve the security of the voice call between the mobile terminals; and in addition, the values of the key for encrypting and decrypting the call voice are different in different call processes, which can further improve the security of the voice call between the mobile terminals.

A mobile computer system requests data by requesting the establishment of a voice connection to a voice server, such as, for example, by selecting a telephone number. The mobile computer system provides an identifier (e.g. caller identification information) that identifies the mobile computer system and a called number that represents data of interest to the mobile computer system. After receiving the identifier and the called number, the voice server may deny the request for establishment of the voice connection. The voice server identifies the data of interest, which may be stored at the voice server or at a data server associated with the voice server, based on the called number. The identifier is mapped to a data address associated with the mobile computer system and the data of interest is sent to the data address. The mobile computer system receives the data of interest over a data connection.