Abstract: A communication device for transmitting a Transmission Control Protocol (TCP) segment over a communication network using a Multipath Transmission Control Protocol (MPTCP) includes: a communication interface configured to establish an MPTCP data flow comprising a plurality of data sub-flows to a further communication device, and to receive a priority indicator from a network entity, wherein the priority indicator indicates a respective priority of a respective data sub-flow; and a scheduler configured to select, for the TCP segment, a data sub-flow from the plurality of data sub-flows based on the priority indicator. The communication interface is further configured to transmit the TCP segment via the selected data sub-flow to the further communication device.

Abstract: A data traffic control device for controlling different data traffic includes: a first access interface; a data memory; and at least one control unit. The at least one control unit is configured to: store, on the data memory, first data traffic in a first transmission queue, second data traffic in a second transmission queue and third data traffic in a third transmission queue, wherein different priorities are assigned to the first, second and third transmission queues; read out the first data traffic, the second data traffic and the third data traffic stored on the data memory according to the priorities assigned to the first, second and third transmission queues; and transmit, via the first access interface, the first data traffic, the second data traffic and the third data traffic in an order as read out.

Abstract: A multipath capable communication device includes: a first communication path and a second communication path configured to provide data traffic to be transmitted; at least one control unit; a multipath scheduler configured to distribute data traffic to the first communication path and/or to the second communication path based on a first path metric; a first traffic shaper configured to limit the total bandwidth allocated to the communication device to a first adjustable bandwidth limiting value; and a second traffic shaper configured to limit the bandwidth allocated to the first communication path to a second adjustable bandwidth limiting value and/or a third traffic shaper configured to limit the bandwidth allocated to the second communication path to a third adjustable bandwidth limiting value. The at least one control unit is configured to control the multipath scheduler, the first traffic shaper, and the second traffic shaper and/or third traffic shaper.

Abstract: A method for domain name resolution includes: requesting, by an access device, via a resolving request, an IP address based on a present domain name or a domain name based on a present IP address, wherein the access device is configured to have multipath access to a data network via at least two access paths; generating, by the access device, an initial domain name query based on the resolving request; duplicating, by the access device, the initial domain name query into at least two multiplied domain name queries; sending, by the access device, each of the at least two multiplied domain name queries to a respective name server; and receiving, by the access device, a domain name response comprising the requested IP address or the requested domain name from each respective name server.

Abstract: A method for restricting multi-connectivity functionality of a user equipment (UE) includes: storing a mapping table on a memory of the UE, wherein the mapping table provides assignment information about a respective single access mode assigned to a service requestable by the UE, wherein the respective single access mode is one of multiple access modes; receiving service information about a requested service via a network interface of the UE; comparing, by a process of the UE, the service information to entries of the mapping table, and selecting a single access mode assigned to the requested service; wherein the multi-connectivity functionality of the UE is restricted by: a bypass entity redirecting data traffic associated with the requested service directly to the selected single access mode; or a multipath scheduler scheduling data traffic associated with the requested service to a communication link that corresponds to the selected single access mode.

Abstract: A system includes: a user equipment (UE); at least two Internet access providers; a multi-connectivity provider backend; a home network (HN); and a data network (DN). The UE comprises at least two access interfaces. Multi-connectivity is provided between the UE and the HN. The multi-connectivity provider backend is configured to establish a connection to the HN, and to provide the UE with access to the HN.

Abstract: A method for ensuring secure wireless communication of a first device in a communication system includes: retrieving information about a type of trustiness of a first communication link of a first access technology and about a type of trustiness of a second communication link of a second access technology, wherein a second device and the first device are configured to communicate data with each other via the first communication link and the second communication link; determining, by a processor of the first device and/or a processor of the second device, security levels based on the information about the type of trustiness of the first communication link and about the type of trustiness of the second communication link.

Abstract: A method ensures secure communication of a Zero Touch Connectivity-Device (ZTC-Device) in a communication system. The ZTC-Device is configured to communicate with a ZTC-Backend of the communication system by establishing a communication link to the ZTC-Backend via a foreign Wi-Fi hotspot of the communication system. The method includes: locating, by the ZTC-Device, the foreign Wi-Fi Hotspot; identifying the Wi-Fi Hotspot; retrieving a type of trustiness of the Wi-Fi Hotspot based on the identity of the Wi-Fi Hotspot; providing the ZTC-Device and/or the ZTC-Backend with the type of trustiness; and setting, by the ZTC-Device and/or the ZTC-Backend, a security level of the communication link based on the type of trustiness.

Abstract: A first packet data conversion device for a sender includes a data interface and a converter. The data interface is configured to provide first packet data according to a first network protocol, in particular according to a Datagram Congestion Control Protocol (DCCP), wherein each packet of the first packet data comprises a first packet header. The converter is configured to convert the first packet data into second packet data. The conversion is based on rearranging contents of the first packet header, wherein the rearranged first packet header indicates that the second packet data is generated according to a second network protocol, in particular according to a User Datagram Protocol (UDP) or a UDP-Lite protocol. A length of the rearranged first packet header is equal to a length of the first packet header.

Abstract: A multipath transmission system includes a first network device and a second network device. The first network device is configured to convert an input data stream into a bundle of sub flows for transmission over a multipath transmission medium. The second network device is configured to reconvert the bundle of sub flows received via the multipath transmission medium into an output data stream. The reconversion comprises reassembling the sub flows to provide the output data stream. The conversion and reconversion are based on a network protocol that provides congestion control. The network protocol is based on non-reliable and out-of-order delivery of the bundle of sub flows. The network protocol is a multipath extension of a Datagram Congestion Control Protocol (DCCP).

Abstract: A reorder queue device for a multipath receiver includes a reorder queue and a reorder queue controller. The reorder queue is configured to queue data packets numbered in sequence which are received over multiple paths of a multipath channel. The reorder queue controller is configured to reorder the data packets in the reorder queue according to a reorder criterion, wherein the reorder criterion is based on at least one of the following: path-specific sequence numbering of the data packets, overall sequence number comparison across the multiple paths, or path-specific characteristics of the multiple paths. The data packets are numbered in a path-specific sequence and in an overall specific sequence. The reorder queue controller is configured to detect a packet loss on a specific path based on determining the overall sequence numbers and/or the path-specific sequence numbers of at least two packets of the specific path.

Abstract: A communication device for transmitting a Transmission Control Protocol (TCP) segment over a communication network using a Multipath Transmission Control Protocol (MPTCP) includes: a communication interface configured to establish an MPTCP data flow comprising a plurality of data sub-flows to a further communication device, and to receive a priority indicator from a network entity, wherein the priority indicator indicates a respective priority of a respective data sub-flow; and a scheduler configured to select, for the TCP segment, a data sub-flow from the plurality of data sub-flows based on the priority indicator. The communication interface is further configured to transmit the TCP segment via the selected data sub-flow to the further communication device.

Abstract: A multipath bundling system includes: a mobile terminal, comprising a Wireless Technologies Database (WTD) and a processor configured to run a multipath bundling protocol (MBP); and a network entity, wherein the network entity is an external server or a multipath bundling server, and wherein the network entity comprises a Self-Learning Wi-Fi Database (SLWD). The mobile terminal and/or the network entity is configured to run a Search-Compare-Assign Algorithm (SCAA). Running the SCAA includes: receiving input data from the WTD and/or the SLWD, the input data indicating information about wireless technologies, including information about at least one cellular connection and at least one Wi-Fi connection, usable by the mobile terminal for multipath bundling; and determining at least one Wi-Fi connection usable by the mobile terminal for multipath bundling based on the received input data in accordance with an optimization criterion.

Abstract: The disclosure relates to techniques for network protocol conversion, in particular to a first packet data conversion device (810) for a sender, the packet data conversion device (810) comprising: a data interface (811) configured to provide first packet data (813) according to a first network protocol (814), in particular according to a Datagram Congestion Control Protocol, DCCP, wherein each packet of the first packet data (813) comprises a first packet header (815); and a converter (812) configured to convert the first packet data (813) into second packet data (817), wherein the conversion is based on rearranging contents of the first packet header (815), wherein the rearranged first packet header (819) indicates that the second packet data (817) is generated according to a second network protocol (818), in particular according to a User Datagram Protocol,UDP or according to a UDP-Lite protocol.

Abstract: A multipath scheduler device for scheduling data traffic includes: at least one first type data path; at least one second type data path; and a scheduler configured to schedule a first portion of the data traffic for transmission via the at least one first type data path and to schedule a second portion of the data traffic for delayed transmission via the at least one second type data path.

Abstract: A multipath transmission system includes a first network device and a second network device. The first network device is configured to convert an input data stream into a bundle of sub flows for transmission over a multipath transmission medium. The second network device is configured to reconvert the bundle of sub flows received via the multipath transmission medium into an output data stream. The reconversion comprises reassembling the sub flows to provide the output data stream. The conversion and reconversion are based on a network protocol that provides congestion control. The network protocol is based on non-reliable and out-of-order delivery of the bundle of sub flows. The network protocol is a multipath extension of a Datagram Congestion Control Protocol (DCCP).

Abstract: A multipath device for processing multipath data traffic includes: a multipath network access interface comprising at least one access interface for receiving multipath data traffic; and a host processor configured to operate at least one multi-connectivity network protocol and a multipath protocol policy manager (MPPM). The at least one multi-connectivity network protocol is configured to process data traffic of the multipath data traffic that is related to the at least one multi-connectivity network protocol and received via multiple paths of the multipath network access interface. The MPPM is configured to manage the multiple paths of the multipath network access interface and/or the at least one access interface of the multipath network access interface according to a multipath network protocol policy. The multipath network protocol policy depends on feedback from other multi-connectivity network protocols running on the host processor.

Abstract: A multipath device for processing multipath data traffic, the multipath device comprising: a multipath network access interface for receiving multipath data traffic; and a host processor configured to process a plurality of multi-connectivity network protocols. A specific multi-connectivity network protocol of the plurality of multi-connectivity network protocols is configured to utilize protocol-specific resources of the multipath device for processing a portion of the multipath data traffic that is related to the specific multi-connectivity network protocol. The specific multi-connectivity network protocol is configured to share the network protocol-specific resources with other multi-connectivity network protocols which are configured to process portions of the multipath data traffic that are related to the other multi-connectivity network protocols by distributing payload data transport onto multiple sub-flows of a multipath connection.

Abstract: A reorder queue device for a multipath receiver includes a reorder queue and a reorder queue controller. The reorder queue is configured to queue data packets numbered in sequence which are received over multiple paths of a multipath channel. The reorder queue controller is configured to reorder the data packets in the reorder queue according to a reorder criterion, wherein the reorder criterion is based on at least one of the following: path-specific sequence numbering of the data packets, overall sequence number comparison across the multiple paths, or path-specific characteristics of the multiple paths. The data packets are numbered in a path-specific sequence and in an overall specific sequence. The reorder queue controller is configured to detect a packet loss on a specific path based on determining the overall sequence numbers and/or the path-specific sequence numbers of at least two packets of the specific path.

Abstract: A data flow manager for distributing data of a data stream of a user equipment via a first communication link and via a second communication link includes: a network interface configured to receive a first status signal indicating a link quality of the first communication link, a second status signal indicating a link quality of the second communication link and a third status signal indicating a link quality of a composite communication link; and a processor configured to, if at least one of the first status signal or the second status signal indicates a higher link quality than a link quality that is indicated by the third status signal, determine a reduction of an amount of data of the data stream communicated over the first communication link and an increase of an amount of data of the data stream communicated over the second communication link.