Abstract: Disclosed is a method for use in a process of selective catalytic reduction (SCR) after-treatment of an exhaust gas of an exhaust gas stream, where the process comprises the reduction of nitrogen oxides of the exhaust gas stream through the use of a reducing agent derived from an additive. The disclosed method comprises: defining an integrand to be the difference between the rate of injection of the additive and the rate of evaporation of the additive to the reducing agent multiplied by a coefficient (s), wherein the value of the coefficient (s) is between zero and one; producing an integral controller output proportional to the integral of the integrand with time; requesting a countermeasure based on the integral controller output to counteract solid deposits derived from the additive.

Abstract: Disclosed is a method for use in a process of selective catalytic reduction (SCR) after-treatment of an exhaust gas of an exhaust gas stream, where the process comprises the reduction of nitrogen oxides of the exhaust gas stream through the use of a reducing agent derived from an additive. The disclosed method comprises: defining an integrand to be the difference between the rate of injection of the additive and the rate of evaporation of the additive to the reducing agent multiplied by a coefficient (s), wherein the value of the coefficient (s) is between zero and one; producing an integral controller output proportional to the integral of the integrand with time; requesting a countermeasure based on the integral controller output to counteract solid deposits derived from the additive.

Abstract: The present invention relates to a method for adaption of an exhaust treatment system arranged for treating an exhaust stream produced by an engine, where the exhaust treatment system includes at least a first additive dosage device, a first selective catalytic reduction catalyst arranged downstream of the first additive dosage device, a second additive dosage device arranged downstream of the first selective catalytic reduction catalyst, and a second selective catalytic reduction catalyst arranged downstream of the second additive dosage device. The method includes initiating an adaption of the second selective catalytic reduction catalyst, and controlling, during the adaption of the second selective catalytic reduction catalyst, the first additive dosage device to inject additive in accordance with at least one injection rule being designed for the adaption.

Abstract: Systems and methods for dynamically causing a terminal to change audio codec modes during a session with another terminal. In one aspect, the terminal is forced use to switch to a more resilient audio codec mode when the quality of wireless channel being used by the terminal deteriorates below a threshold.

Abstract: Systems and methods for dynamically causing a terminal to change audio codec modes during a session with another terminal. In one aspect, the terminal is forced use to switch to a more resilient audio codec mode when the quality of wireless channel being used by the terminal deteriorates below a threshold.

Abstract: A signalling proxy system for a switching center server is provided, as well as a method of operating a signalling proxy system for a switching center server. The signalling proxy system comprises two signalling proxies for routing signalling traffic between a network node and a plurality of switching center server units. Each signalling proxy is addressable by an address code and is operable in one of an active state and a passive state towards the network node.

Abstract: Apparatus configured to operate within a communication network as a pool proxy, routing signalling traffic between a node of a first network and one of a set of pooled nodes within a second network. The apparatus is further configured to operate in one of an active state and a passive state towards the first network node and, when in said active state to send a heartbeat signal to at least one of said pooled nodes for relaying to a peer pool proxy and, when in said passive state, to receive a heartbeat signal from a peer pool proxy relayed via at least one of said pooled nodes. In the event that no heartbeat signal is received when in the passive state, the apparatus is configured to activate itself as pool proxy towards the first network node.

Abstract: A method of updating routing tables stored at a multiplicity of Signaling End Points (SEPs) of an SS7 over IP signaling network following the introduction of a new SEP into the network. The new SEP sends a message to an existing SEP, the message identifying an IP address and SS7 address(es) of the new SEP. The existing SEP adds the IP address and SS7 address(es) of the new SEP to the routing table(s) stored at the existing SEP, and forwards the message to other SEPs identified in the routing table(s) at the existing SEP. The other SEPs add the IP address and SS7 address(es) of the new SEP to their routing tables. Each SEP that receives the message sends a response message to the new SEP containing the IP and SS7 addresses of the responding SEP, and the new SEP populates its routing table(s) using the contents of the response messages.

Abstract: A method of enabling charging information generated within a GPRS access network 4 to be associated with charging information generated within an IP Multimedia Core Network Subsystem, IMSS, the charging information relating to a multimedia call facilitated by the IMSS and carried by the GPRS network. The method comprises sending a SIP call identity from the IMSS to the GPRS network and/or a GPRS charging identity from the GPRS network to the IMSS. A received identifier is included in charging information messages generated by one or both of the GPRS network and the IMSS.

Abstract: The present invention relates in general to communication networks and more specifically to a system and a method for charging in a communication network, especially in an IP Multimedia network. The new charging system allows charging principles used in traditional telecom networks to be applied also in IP Multimedia networks.

Abstract: A method of determining a total call tariff in respect of a call from a Mobile Station currently registered with a foreign network. A total call tariff request is sent from a charging function of the foreign network to a rating node of the mobile telephone subscriber's home network, the message including a call tariff portion of the foreign network. At the rating node, the total call tariff is determined by applying a multiplying factor to the foreign network's tariff portion. The determined total call tariff is then sent to the charging function of the foreign network.

Abstract: A method of providing call tariff information to a subscriber coupled to a telecommunications network 1, where the call tariff information relating to a call from a terminal 9 of the subscriber to a B-number 13. The method comprising sending a subscriber initiated call tariff enquiry from the subscriber terminal 9 to the telecommunications network 1 over a signalling channel, the enquiry including at least a part of said B-number or an identification of the B-number. Call tariff information relating to said call is determined at the network 1 and sent from the network 1 to the subscriber terminal 9 over said signalling channel. The call tariff information is then presented to the subscriber on a display 11 of the subscriber terminal 9.

Abstract: A method of providing call charge information in a mobile telecommunications system. The method comprises maintaining in a home mobile telecommunications network a set of call charging algorithms which correspond to respective foreign mobile telecommunications networks. The algorithms are transferred periodically to respective foreign networks, wherein the transferred algorithms may be used by the receiving foreign networks to calculate call charge information for subscribers of the home network when they are roaming in the foreign networks.