Abstract: Provided are a method and signaling gateway for establishing an optimized media path applied in an IMS network. The method includes: during the process of forwarding a session description protocol (SDP) request and response, when receiving a SDP response of a first session, a first ALG judging that there is an optimized media path between itself and a second ALG, then when sending the SDP response of the first session, including indication information in the send SDP response; the first ALG sending a SDP request with the target being the second ALG; and after having received the SDP response of the first session including the indication information or after having received the SDP request with the target being the second ALG and the SDP response of the first session including the indication information, the second ALG sending the SDP response of the first session.

Abstract: A method for handing over an alerting phase session with customized alerting tone is disclosed. The method includes: when the handover occurs in an alerting phase session with a customized alerting tone in the way of early session, a mobile switching center initiating a handover of a normal media negotiation dialog and the MSC or customized alerting tones application server initiating a handover of customized alerting tone session. A system for handing over an alerting phase session with customized alerting tone is also disclosed, and the system includes a mobile switching center and a customized alerting tones application server. In the present method and system, even the handover from PS network to CS network occurs, the service experience of the calling user on the customized alerting tone session will not change, thus the normal call request is not affected and there is no need to modify the exiting IMS architecture.

Abstract: The disclosure discloses a method for realizing single radio voice call continuity, which is applied in an IP Multimedia Core Network Subsystem (IMS) network. The method includes: receiving, by a service continuity application server (SC AS), a handover request, and then updating, by the SC AS, a remote leg, and transmitting, by the SC AS, a handover notification message to a user terminal; receiving, by the user terminal, a handover command in a Packet Switch (PS) domain and the handover notification message, then adjusting, by the user terminal, an access mode to be accessing a Circuit Switch (CS) domain. The invention further discloses a system for realizing single radio voice call continuity. The method and system for realizing enhancement of single radio voice call continuity provided by the disclosure can effectively reduce the overlong interruption time in the prior art, and greatly improve the user experience.

Abstract: The present disclosure provides an IMS media codec negotiation method, which is used in an IMS network. The method comprises: when forwarding a media resource request, a first signaling media network element carries a media address of a second media gateway and a codec supported by the second media gateway into the media resource request, wherein the second media gateway is controlled by the first signaling media network element and is used for code transition; when receiving a media resource response, the first signaling media network element takes the second media gateway as a node of a media path in the case that the media resource response information related to the second media gateway. An IMS media codec negotiation system is also provided by the present disclosure.

Abstract: A method for implementing local call local switch (LCLS) is provided in the present invention, and the method includes that: a mobile switching center (MSC) at a calling side receives a call establishment request of a calling user, and a MSC at a calling side transmits the local reference to a base station system (BSS) at the calling side and a MSC at the called side; the MSC at the called side transmits the received local reference to the BSS at the called side; and a BSS judges whether the local switch can be triggered according to the received local reference, and executes the local switch when determining that the local switch can be triggered. The present invention also provides a system for implementing LCLS. With the method and system provided by the present invention, the problem of unsuccessful local switch resulted by the BSS connecting multiple MSCs is solved.

Abstract: The present invention provides a method for implementing local call local switch, which includes that: a source MSC receives a handover request from a source BSS; the source MSC transfers a local reference to a destination BSS; and the destination BSS judges whether local switch can be triggered according to the received local reference, and executes the local switch if a judgment result is that the local switch can be triggered. The present invention further provides a system for implementing local call local switch, which includes a MSC and a BSS, wherein the MSC includes a MSC request module and a MSC processing module, and the BSS includes a BSS request module and a BSS processing module, so as to support for implementing the local call local switch in a handover scenario. The method and the system solve the problem of unsuccessful local switch due to BSS connecting multiple MSCs.

Abstract: The present invention provides a method for implementing local call local switch, including: a calling side MSC receiving a call setup request from a calling user, the calling side MSC and a called side MSC mutually transferring the access information of the calling user and the called user; the calling side MSC or the called side MSC judging whether a local switch can be triggered according to the access information of the opposite end user; when judging that a local switch can be triggered, the calling side MSC or the called side MSC informing BSS to implement the local switch. The present invention further provides a system for implementing local call local switch, which includes a MSC and a BSS, to provide the support to implementing local call local switch.

Abstract: A method for realizing a single radio voice call continuity and a single radio voice call continuity system are disclosed. After a UE-1 establishes an IMS session with a remote leg through a PS network, wherein in the IMS session, signaling is anchored to an ICP and media is anchored to an AGW controlled by the ICP, the method is realized as follows: sending a handover request by a control net element of the PS network to an eMSC to request a handover of the IMS session to a CS network access mode; after receiving the handover request, preparing a media link resource by the eMSC for the UE-1 to communicate with the eMSC and sending a call request to the ICP; and controlling the AGW to correlate a media link established by the call request with a remote leg media link of the IMS session by the ICP. The method can effectively solve the problem existing in the prior art that the duration of interruption is too long, and improve user experience.

Abstract: The present invention provides a path node determining method, a media path establishing method and a signaling media gateway. The path node determining method comprises: for any one of the signaling media gateways in the IMS network, when receiving a first SDP offer, transmitting a first SDP offer carrying a first path parameter, wherein a network segment identifier of the signaling media gateway is added in the first path parameter of the transmitted first SDP offer; when receiving a first SDP answer for the transmitted first SDP offer, the signaling media gateway judging, according to a second path parameter in the received first SDP answer or the first path parameter in the transmitted first SDP offer, whether the signaling media gateway is a path node; and transmitting the first SDP answer which carries or does not carry the second path parameter.

Abstract: A media negotiation method for an IP multimedia link is used in the process of establishing an IP multimedia link between a first entity and a second entity via an application server (AS) of an IP multimedia subsystem (IMS). AS sends the second entity an invite message, which includes media resource information of the first entity; When AS receives a message with media resource information from the second entity before an answer message is received or after it receives a response message with media resource information from the second entity, AS sends an IMS re-invite message without media source information to the first entity; the AS, after receiving the IMS signaling message with media resource information from the first entity, sends the first entity the media resource information returned by the second entity. The present invention is applicable to an IMS centralized service and may effectively reduce the number of steps and the time required after response for media resource re-negotiation.

Abstract: A method for implementing a service for playing multimedia information during a session termination process, applied in an IP multimedia subsystem, comprises the following steps: (1) when a party, referred to as a disconnecting party, in a session disconnects the session, a server equipment requesting a media resource function to reserve multimedia information resource for a party with which the session is disconnected by the disconnecting party, referred to as a disconnected party, and to play the multimedia information to the disconnected party; (2) when the disconnected party disconnects the session or the multimedia information playing is finished, the server equipment performing a corresponding disconnection flow to disconnect the session. With the present invention, it can be implemented that during a session termination process, if one party disconnects the session, the other party can receive multimedia information sent to it by the network, which updates the experience of the user.

Abstract: A device and method that determine conditions under which a break in a web of a printing system is more likely to occur store data pertaining to one or more attributes associated with the manufacture of each web used in a plurality of printing runs. The device and method then implement a correlation analysis, such as a decision-tree induction analysis, using the stored data to determine if there is a correlation between the one or more web manufacturing attributes and the occurrence of a web break. The device and method may store web manufacturing data indicating one or more of a mill site, a web manufacturing machine, a date, a reel number, a reel set, a log position, any auxiliary web manufacturing equipment, a web tensile strength, a web moisture content and/or a coefficient of friction associated with the manufacture of the webs used in the plurality of printing runs.

Abstract: A device and a method use a decision-tree induction analysis to determine a web tension ratio range for which web breaks are less likely to occur within a printing system based on web tension data collected from a plurality of previous runs of the printing system. The device and method also measure two are more web tensions during operation of the printing system, calculate a web tension ratio and compare that calculated web tension ratio with the determined web tension ratio range. When the calculated web tension ratio falls outside of the determined web tension ratio range, the device and method alert a user to the fact that a condition leading to a web break is present and/or control the measured web tensions to drive the calculated web tension ratio to be within the determined web tension ratio range.

Abstract: A system, which converts a continuous tone value undergoing conversion to an output value, generates first and second errors and an output. The first error is based upon (i) the continuous tone value undergoing conversion, (ii) output values corresponding to previously converted continuous tone values, output values predicted for continuous tone values yet to be converted, and an output value having an assumed first level for the continuous cone value undergoing conversion, and (iii) a matrix value based upon the continuous tone value undergoing conversion. The second error is based upon (i) the continuous tone value undergoing conversion, (ii) the output values corresponding to the previously converted continuous tone values, the output values predicted for the continuous tone values yet to be converted, and an output value having an assumed second level for the continuous tone value undergoing conversion, and (iii) the matrix value based upon the continuous tone value undergoing conversion.

Abstract: A system for converting a continuous tone value to an output value having either a first level or a second level develops a first error based upon the application of a separable filter to an output value having a first level assumed for the continuous tone value undergoing conversion. A second error is developed based upon the application of the separable filter to an output value having a second level assumed for the continuous tone value undergoing conversion. If the first error is greater than the second error, the continuous tone value is converted to the output value having the second level. Otherwise, the continuous tone value is converted to the output value having the first level. The resulting error is diffused in a predetermined manner to neighboring continuous tone values yet to be converted.

Abstract: A system is disclosed for converting a continuous tone value to an output value having a first level or a second level. A first error magnitude is generated based upon continuous tone values already converted, continuous tone values not yet converted and an output value having the first level assumed for the continuous tone value undergoing conversion. A second error magnitude is similarly generated except that an output value having the second level is assumed for the continuous tone value undergoing conversion. If the first error magnitude is less than the second error magnitude, then the continuous tone value undergoing conversion is converted to the output value having the first level and, otherwise, the continuous tone value undergoing conversion is converted to the output value having the second level. The error corresponding to the converted lineary value is diffused in a predetermined manner to neighboring continuous tone values which have not yet been converted.

Abstract: A composite signal is formed by simultaneously transmitting multiple asynchronous data bit sequences, that are coded with respective spreading codes, in a single channel; and a circuit is provided which decodes any bit b(x) in that composite signal. This circuit includes a set of filters which are matched to all of the spreading codes and which obtain (a) a matched filter output signal y(x) for the x-th data bit b(x) and (b) matched filter output signals y(x+1) thru y(x+k-1) for the k-1 data bits that immediately follow data bit b(x); K is the number of bit sequences in the composite signal. An arithmetic unit combines the matched filter output signals via the expression: ##EQU1## where H(x,x.+-.i) is the cross correlation of the spreading codes for data bits b(x) and b(x.+-.i) over the time period that those data bits overlap (and thus add) in the composite signal, and ESTb(x-i) is an estimate of data bit b(x-i) which precedes bit b(x).

Abstract: Data bits are decoded from a composite signal that is formed by coding multiple bit sequences with respective spreading codes, and transmitting the coded bit sequences simultaneously and asynchronously over a single channel in which the bit sequences are added. This decoding involves a metric in combination with a repetitive decision process which is only linearly dependent on the number of bit sequences in the composite signal.