Abstract: A method for realizing network selection by a user equipment includes the following steps: in a first step, suitable radio cells of a considered radio access technology are determined by the user equipment based on a cell selection criterion regarding the considered radio access technology; and in a second step, upon initiating network selection according to an automatic network selection mode, only such mobile communication networks corresponding to suitable radio cells of the considered radio access technology are considered for network selection of the user equipment that have or correspond to reception conditions meeting or exceeding an enhanced network selection criterion.

Abstract: A method for realizing cell selection by a user equipment includes the following steps: in a first step, suitable radio cells of a considered radio access technology are determined by the user equipment based on a home public land mobile network (HPLMN)-provided cell selection criterion regarding the considered radio access technology; and in a second step, upon initiating network selection according to an automatic network selection mode, only such suitable radio cells are considered for network selection of the user equipment that have or correspond to reception conditions corresponding to or exceeding the HPLMN-provided cell selection criterion.

Abstract: A method for detection of a user equipment type includes: receiving, by a communication network, a service request message from a user equipment, wherein the service request message requests a service from the communication network and comprises subscriber identity information and/or device identity information related to the user equipment and an indication that an alternative authorization method and/or an alternative authentication method is to be applied to the user equipment; verifying, by the communication network, based on the subscriber identity information and/or the device identity information related to the user equipment, that the user equipment belongs to an internet-of-things user equipment type; and in response to verifying that the user equipment belongs to the internet-of-things user equipment type, granting, by the communication network, the requested service to the user equipment.

Abstract: A method for establishing a communication connection of a communication terminal via a communication network includes receiving an identification of the communication terminal by a first identification entity of a first subnetwork, wherein the identification of the communication terminal identifies the communication terminal.

Abstract: A method for assigning a subnetwork to a communication terminal in a communication network having a plurality of subnetworks, wherein a subnetwork identifier is assigned to each subnetwork, includes receiving an identification from the communication terminal. The identification comprises a subnetwork identifier of a particular subnetwork of the communication network. The method further includes extracting the subnetwork identifier from the received identification, selecting the particular subnetwork from the plurality of subnetworks of the communication network based on the extracted subnetwork identifier, and assigning the particular subnetwork to the communication terminal for communicating in the communication network.

Abstract: A communication system for communication in a communication network having a first subnetwork and a second subnetwork includes a first identification entity assigned to the first subnetwork and configured to receive an identity of a communication terminal and identify the communication terminal on a basis of the identity for communication over the first subnetwork. The communication system additionally includes a second identification entity assigned to the second subnetwork and configured to receive the identity of the communication terminal and identify the communication terminal on the basis of the identity for communication over the second subnetwork. The communication system further includes a management entity configured to authenticate the communication terminal for communication over a particular subnetwork.

Abstract: A method for establishing a communication connection of a communication terminal via a communication network includes receiving an identification of the communication terminal by a first identification entity of a first subnetwork, wherein the identification of the communication terminal identifies the communication terminal.

Abstract: A method for detection of a user equipment type includes: receiving, by a communication network, a service request message from a user equipment, wherein the service request message requests a service from the communication network and comprises subscriber identity information and/or device identity information related to the user equipment and an indication that an alternative authorization method and/or an alternative authentication method is to be applied to the user equipment; verifying, by the communication network, based on the subscriber identity information and/or the device identity information related to the user equipment, that the user equipment belongs to an internet-of-things user equipment type; and in response to verifying that the user equipment belongs to the internet-of-things user equipment type, granting, by the communication network, the requested service to the user equipment.

Abstract: A method to establish a roaming connection of a communication terminal of a foreign communication network in a visited communication network includes receiving a roaming connection request from the communication terminal of the foreign communication network by a first identification entity of a first sub-network of the visited communication network, the roaming connection request having an identifier of the communication terminal. The method further includes identifying the communication terminal based on the identifier of the communication terminal, receiving a foreign sub-network identifier by the first identification entity of the visited communication network; verifying, on a basis of the foreign sub-network identifier, whether a respective sub-network of the visited communication network corresponds to the foreign sub-network; and sending a configuration request for a configuration of the foreign sub-network.

Abstract: A method for assigning a subnetwork to a communication terminal in a communication network having a plurality of subnetworks, wherein a subnetwork identifier is assigned to each subnetwork, includes receiving an identification from the communication terminal. The identification comprises a subnetwork identifier of a particular subnetwork of the communication network. The method further includes extracting the subnetwork identifier from the received identification, selecting the particular subnetwork from the plurality of subnetworks of the communication network based on the extracted subnetwork identifier, and assigning the particular subnetwork to the communication terminal for communicating in the communication network.

Abstract: A communication system for communication in a communication network having a first subnetwork and a second subnetwork includes a first identification entity assigned to the first subnetwork and configured to receive an identity of a communication terminal and identify the communication terminal on a basis of the identity for communication over the first subnetwork. The communication system additionally includes a second identification entity assigned to the second subnetwork and configured to receive the identity of the communication terminal and identify the communication terminal on the basis of the identity for communication over the second subnetwork. The communication system further includes a management entity configured to authenticate the communication terminal for communication over a particular subnetwork.

Abstract: A method to establish a roaming connection of a communication terminal of a foreign communication network in a visited communication network includes receiving a roaming connection request from the communication terminal of the foreign communication network by a first identification entity of a first sub-network of the visited communication network, the roaming connection request having an identifier of the communication terminal. The method further includes identifying the communication terminal based on the identifier of the communication terminal, receiving a foreign sub-network identifier by the first identification entity of the visited communication network; verifying, on a basis of the foreign sub-network identifier, whether a respective sub-network of the visited communication network corresponds to the foreign sub-network; and sending a configuration request for a configuration of the foreign sub-network.

Abstract: A method for estimating a geographical distance between at least two user equipments includes: generating, by a first user equipment, a discovery message, wherein the discovery message comprises a transmission power information; transmitting, by the first user equipment, the discovery message using a common air interface of the first user equipment and the second user equipment, using the level of transmission power; receiving, by the second user equipment, the discovery message comprising the transmission power information and determining a level of reception power; and determining, by the second user equipment, based on the received transmission power information and the determined level of reception power, an estimation related to the geographical distance between the first user equipment and the second user equipment, or to a range of the geographical distance out of a plurality of different ranges of the geographical distance between the first user equipment and the second user equipment.

Abstract: A method for estimating a geographical distance between at least two user equipments includes: generating, by a first user equipment, a discovery message, wherein the discovery message comprises a transmission power information; transmitting, by the first user equipment, the discovery message using a common air interface of the first user equipment and the second user equipment, using the level of transmission power; receiving, by the second user equipment, the discovery message comprising the transmission power information and determining a level of reception power; and determining, by the second user equipment, based on the received transmission power information and the determined level of reception power, an estimation related to the geographical distance between the first user equipment and the second user equipment, or to a range of the geographical distance out of a plurality of different ranges of the geographical distance between the first user equipment and the second user equipment.

Abstract: A method for setting-up a data connection during a group voice service between several group members as a user of a mobile communication network. In a first method, functions of an IP multimedia subsystem (IMS) are used and a session initiation protocol (SIP) and a controlled data connection between an emitter, a terminal and one or several receivers is produced. Each user is allocated to a group voice service identity (VGCS-ID) an IMS group identity (IMS group ID) and is routed to an application server in the IMS with the aid of the user. A data group voice service is developed between the users. In a second method, each user is routed to the service nodes via GPRS using a group voice service identity (VGCS-ID) and an IP address of a service node, which acts as a relay and a data group voice service is carried out between the users.

Abstract: A method for indicating an emergency call availability to a Mobile Equipment includes: storing, at a memory device attached to the ME, information regarding the possibility of unauthenticated emergency calls in dependency of availability data, determining that the ME is in a limited service state; and indicating, by the ME, emergency call availability. The availability data indicates, for at least a first mobile telecommunications network and a second mobile telecommunications network, whether: all unauthenticated emergency calls are allowed with or without an identification module inserted in the ME, unauthenticated emergency calls are only allowed if a valid identification module is inserted in the ME, or unauthenticated emergency calls are not allowed.

Abstract: A method for using a subscriber identifier for addressing a network subscriber in a communication network includes: combining, within the subscriber identifier, a number of binary coded decimals with at least one digit, wherein the at least one digit is a binary coded number of a higher order numbering system than the decimal numbering system.

Abstract: A method for indicating an emergency call availability to a Mobile Equipment includes: storing, at a memory device attached to the ME, information regarding the possibility of unauthenticated emergency calls in dependency of availability data, determining that the ME is in a limited service state; and indicating, by the ME, emergency call availability. The availability data indicates, for at least a first mobile telecommunications network and a second mobile telecommunications network, whether: all unauthenticated emergency calls are allowed with or without an identification module inserted in the ME, unauthenticated emergency calls are only allowed if a valid identification module is inserted in the ME, or unauthenticated emergency calls are not allowed.

Abstract: The invention relates to a method and a system for the network-initiated IMS registration of a telecommunication terminal. According to said method, the network transmits a message having specific characteristics to the terminal via an existing communication link, and the terminal recognizes said message as an IMS registration request based on the characteristics of the message end subsequently sends a registration message to the network to register with the IMS.

Abstract: The invention relates to a method and a system for the network-initiated IMS registration of a telecommunication terminal. According to said method, the network transmits a message having specific characteristics to the terminal via an existing communication link, and the terminal recognizes said message as an IMS registration request based on the characteristics of the message end subsequently sends a registration message to the network to register with the IMS.