45 results about "Multipath TCP" patented technology

The present disclosure relates to a method, performed in a single IP-address source node in a wireless communication network, of establishing a multipath TCP, MPTCP, connection for transfer of TCP data in MPTCP subflows to a destination node. The single IP-address source node receives an MPTCP trigger to activate a multipath TCP connection. One or more source TCP ports are selected, wherein each source TCP port is selected to constitute a starting point of an MPTCP subflow. One or more MPTCP notifications are sent to the destination node. Each MPTCP notification includes information on a selected source TCP port. The single IP-address source node receives an acknowledgment of each MPTCP notification from the destination node.The present disclosure also relates to corresponding method performed in a destination node and a wireless device configured for establishing an MPTCP connection.

It is provided a method, comprising configuring a first internet protocol address and a second internet protocol address different from the first internet protocol address for a connection between an apparatus performing the method and a packet data network; assigning the first internet protocol address to a first data path for the connection and to assign the second internet protocol address to a second data path for the connection, wherein at least a part of the first data path belongs to a radio access technology; at least a part of the second data path belongs to the radio access technology; and the part of the first data path is different from the part of the second data path.

Embodiments of the present invention include systems and methods for identifying a primary flow and its corresponding subflow(s) so that the subflow(s) may be routed to more efficiently use bandwidth between a source host and a destination host. In embodiments, a table correlates flows and their corresponding keys for Multipath TCP flows. When a new subflow is initiated between a source device and a destination device, the new flow can be identified as being a subflow of a primary flow using data in the table. Having identified the subflow and its corresponding primary flow, the new subflow may have an installed route path that differs from its primary flow, thereby improving the bandwidth usage.

The invention provides a multipath TCP (transmission control protocol) message scheduling method. The bottleneck sub-flow problem in multipath is solved by reasonably scheduling messages of sub-flows according to difference of the packet loss rate of the sub-flows and time delay. Joint transmission of all sub-flows is realized, network bandwidth is fully used, and network capacity and stability and robustness in transmission are effectively improved.

The invention relates to a method of a multipath TCP having mobility and combined with a mobile IP (internet protocol), belonging to the field of multipath TCP technology application. The method of the multipath TCP having the mobility and combined with the mobile IP aims at providing a mobility support for a multipath TCP supporting mobile host and can satisfy user requirements of using a plurality of interfaces at the same time and communicating at all times and places. The method of the multipath TCP having the mobility and combined with the mobile IP realizes multiconnection and mobility support by combining a multipath TCP and the mobile IP. A modified mobile IP layer is in charge of supporting the mobility, a multipath TCP layer is in charge of establishing and managing multiple paths, and therefore, the host motion and the multipath transmission data are transparent for an application layer in order to realize the multipath TCP with the mobility.

A multipath transport protocol such as multipath TCP can utilize metrics such as a wireless link condition corresponding to one or more paths as a parameter for controlling a dynamic allocation of data and control signaling over respective paths. Fault-tolerant control can enable retransmissions of packets already sent on a poor path, onto a good path. Further, the feedback, the retransmissions, and other control signaling can be provided on a separate subflow or on a UDP overlay. In this way, a multipath TCP connection can be more reliable and efficient as flow control and data flow are enhanced.

A method is disclosed for exchanging data over a TCP connection between a client node and a networking node. The TCP connection comprises a primary MPTCP subflow between a customer premises equipment, a HCPE, and a hybrid access gateway, a HAG. The method comprises, by the HCPE, converting first TCP segments to first MPTCP segments of the primary MPTCP subflow and vice versa, and using destination address information of the first TCP segments as destination address information of the first MPTCP segments, and using source address information of the first MPTCP segment as source address information of the first TCP segments. The method further comprises, by the HAG, converting second TCP segments to second MPTCP segments of the primary subflow and vice versa while preserving source and destination address information.

The invention provides a multi-path TCP congestion control method based on packet transmission delay. The method includes the following steps that round-trip transmission delay rttr of a current packet is measured through substream r, and a base delay base RTTr is updated according to the rttr; the queuing delay qr of packets is calculated through the substream r according to the rttr and the base RTTr, and the number diffr of the packets queuing currently is estimated according to the qr; whether the diffr is smaller than a control parameter alpha r is judged, if the diffr is smaller than the alpha r, congestion windows cwndr of the substream r are increased linearly, if the diffr is larger than the alpha r, the congestion windows cwndr of the substream r are reduced linearly, and if the diffr is equal to the alpha r, the congestion windows cwndr remain unchanged; the current data transmission rate is estimated by means of the substream r according to the cwndr and the rttr, and the control parameter alpha r is updated in real time according to the data transmission rate. The method has the advantages that calculation cost is low, load balance granularity is small, compatibility is high and expansibility is high.

A selection method for selecting network connection concentrators for a given set of M≧1 communication paths usable by a communicating device. Each respective interface of the communicating device is connected to a respective path. The method includes the following acts: a) identifying a set (P1, P2, . . . , PN) of N≧2 concentrators situated in at least one network to which the communicating device is connected, each concentrator making it possible to aggregate connections using a plurality of paths suitable for being used by the communicating device; b) obtaining the value of at least one quality of service parameter QoS(i,j) for at least one path i, where i=1, . . . , M, and for concentrators Pj reachable from the communicating device via the path i; and c) selecting at least one concentrator from the set on the basis of the quality of service values that are obtained. The method is applicable to the multipath TCP (MPTCP) protocol.

The invention discloses a packet scheduling method and device for a multi-path TCP. The method comprises the steps of receiving a data stream of an application layer and dividing the data stream into multiple groups, wherein the data stream is provided with multiple sub-streams, and each sub-stream is provided with a sending queue; sending the multiple groups to an input queue; sequentially obtaining the multiple groups in the input queue or sequentially distributing the multiple groups to the sending queue of one sub-stream to fill a vacant sending window when the number of the currently overstocked groups in the sending queue of one sub-stream is smaller than the vacant sending window in the sub-stream or when the number of the groups sent by the sub-stream currently is smaller than the current sending window of the sub-stream; reinserting the groups in the sending queues of the sub-streams to the input queue in order and scheduling the groups to sending queues of other sub-streams when packet loss of the sub-streams overtimes or a path loses efficacy. The scheduling method has the advantages of being small in calculation expense, wide in application range, easy to achieve and the like.

The invention discloses a method for controlling multi-priority connection congestion time windows in a multi-path TCP (transmission control protocol) and belongs to the field of a network communication technology. The method is applied to terminal equipment including a multi-core processor and multiple independent physical network interfaces and the network communication process where multiple TCP paths are established by multiple tasks via MPTCP. When the TCP congestion time windows of high-priority tasks are required to be increased, the congestion time windows are constantly ensured as the maximum value of the TCP congestion time windows of all present tasks by the method; when the TCP passageway generation data packets of the high-priority tasks lose, the TCP congestion time windows of various tasks on the same network interface are reduced by one half via the method. When multiple tasks perform network communication via MPTCP and various tasks can select transmission paths with better performances by the method, the high-priority tasks can acquire more network resources; thus the communication service quality of the high-priority tasks can be ensured even if the reception requests of the present TCP path are overmuch and congested.

In the method an Access Point comprises aggregating spare bandwidth of at least another Access Point and capturing data traffic from at least one user computing device, said user computing device taking benefit of said aggregated spare bandwidth. The method: requesting, by said Access Point admission to a MPTcp server including proxy control functions or services, to make use of the latter; checking, by a control module of said MPTcp server, credentials information of said Access Point to allow the latter said admission; and upon said admission being authorized, checking, by said MPTcp server through a connection with a service subscription repository module, if at least one origin server is authorized for accessing said proxy control functions or services.The system is adapted to implement the method.

Some embodiments relate to a user equipment device (UE), and associated methods for performing ROHC header compression on TCP packets with MPTCP option enabled. In some embodiments, a compressor may determine that a first portion of the stream of data packets is formatted according to the transmission control protocol (TCP) with a multipath TCP (MPTCP) option enabled. The compressor may establish context with a corresponding decompressor and may operate in one of three modes of compression based on the context. In some embodiments, when the context indicates that the corresponding decompressor supports decompression of TCP data packets with MPTCP option enabled, the compressor may operate in a first or second mode of compression. In some embodiments, when the context indicates that the corresponding decompressor does not support decompression of TCP data packets with MPTCP option enabled, the compressor may operation in a third mode of compression.

A transmission control protocol (TCP) communication method includes: a) a first client device or a first relay device connected to the first client device sending to a second client device or to a second relay device connected to the second client device a message for initializing a TCP connection on a “first” path, the message including a TCP option indicating that the first client device or the first relay device seeks to participate both in a TCP connection and in a multipath connection over the first path; b) the devices participating in a TCP connection and in a multipath connection over the first path; and c) if at least one of the two client devices or one of the two relay devices observes an anomaly concerning the multipath connection, the first client device and the second client device using the TCP connection to exchange payload data.

The invention relates to a method of a multipath TCP having mobility and combined with a mobile IP (internet protocol), belonging to the field of multipath TCP technology application. The method of the multipath TCP having the mobility and combined with the mobile IP aims at providing a mobility support for a multipath TCP supporting mobile host and can satisfy user requirements of using a plurality of interfaces at the same time and communicating at all times and places. The method of the multipath TCP having the mobility and combined with the mobile IP realizes multiconnection and mobility support by combining a multipath TCP and the mobile IP. A modified mobile IP layer is in charge of supporting the mobility, a multipath TCP layer is in charge of establishing and managing multiple paths, and therefore, the host motion and the multipath transmission data are transparent for an application layer in order to realize the multipath TCP with the mobility.

There is provided with a communication apparatus which performs, for example, dynamic sub flow priority control in a multipath TCP connection. The communication apparatus has a transceiver configured to communicate with another communication apparatus by establishing a TCP (Transmission Control Protocol) connection that includes a plurality of transport layer connections with different priorities and through different paths. The communication apparatus also has a controller configured to change the priorities of the plurality of transport layer connections based on at least one of setting information of the communication apparatus or usage history information relating to the paths, after the TCP connection with the other communication apparatus is established by the transceiver.

A method of managing a multipath TCP (MPTCP) connection includes establishing the MPTCP connection as a logical connection between end-points that utilizes multiple network paths with one TCP subflow per network path. At least two subflows of the MPTCP connection are terminated at different end-points.

According to an embodiment a method is disclosed for establishing a Multipath TCP connection comprising a first and second TCP connection between a client and a server. The client performs the steps of: sending a synchronization segment to the server indicative for a request to establish the first and second TCP connection, receiving a synchronization and acknowledgement segment from the server, establishing the first and second TCP connections, sending an acknowledgment segment to the server in order for the server to establish the first and second TCP connection.

The invention discloses a multi-path TCP network coding transmission system and method based on packet loss distinguishing in a vehicle ad hoc network. In the vehicle ad hoc network, as the vehicle moving speed is high, the network topological structure of the node in the VANET changes rapidly. Besides, in a wireless vehicle-mounted network environment, the wireless vehicle-mounted network is easily interfered by external environment factors (such as noise, wireless signal attenuation, buildings and the like), so that the transmission efficiency of data in the VANET is greatly reduced. The method comprises the following steps: firstly, judging whether a data packet is lost or not in the sending process of the data packet; secondly, in the case of data packet loss, reasons for data packet loss can be detected, and different processing can be carried out according to the reasons for packet loss on different sub-streams. Experimental simulation shows that compared with a conventional multi-path TCP transmission method, the method provided by the invention not only saves network resources, but also has advantages in network parameters such as throughput and time delay.

A collaborative multipath TCP is provided. A system and method are provided for establishing a multipath connection between two endpoints. The method includes establishing a connection between a first of the two endpoints and one or more consumer devices, creating a virtual network interface in the first of the two endpoints for each of the one or more consumer devices connected to the first of the two endpoints, and transferring packets from the first of the two endpoints through each virtual network interface to a second of the two endpoints.

A selection method for selecting network connection concentrators for a given set of M≥1 communication paths usable by a communicating device. Each respective interface of the communicating device is connected to a respective path. The method includes the following acts: a) identifying a set (P1, P2, . . . , PN) of N≥2 concentrators situated in at least one network to which the communicating device is connected, each concentrator making it possible to aggregate connections using a plurality of paths suitable for being used by the communicating device; b) obtaining the value of at least one quality of service parameter QoS(i,j) for at least one path i, where i=1, . . . , M, and for concentrators Pj reachable from the communicating device via the path i; and c) selecting at least one concentrator from the set on the basis of the quality of service values that are obtained. The method is applicable to the multipath TCP (MPTCP) protocol.

A communication method includes: a) receiving, by a client device suitable for implementing a simple transmission control protocol connection or a multipath connection, or else a relay device connected to the client device and suitable for implementing a multipath connection, in the absence of any multipath connection between the client device or the relay device as the case may be and some other client device, information about the compatibility, if any, with multipath connections of at least one intermediate node placed on a path connecting the client device, or the relay device, as the case may be, to the other client device; and b) the client device or the relay device storing the status of the path concerning its compatibility, if any, with multipath connections.

The invention provides a link information processing method and device. The method comprises the steps of obtaining a data processing request; querying target information of data requested to be processed by the data processing request; determining a handle number according to the target information; and searching or updating TCP link information in a link information storage module by taking thehandle number as an address. Namely, the link state / link information is managed and updated in real time through the handle number, and the requirement that multiple TCP / IP links work at the same timeis met. Through the above mode, resource utilization is reduced, and a multipath TCP / IP link support function is realized.

It is provided a method, comprising configuring a first internet protocol address and a second internet protocol address different from the first internet protocol address for a connection between an apparatus performing the method and a packet data network; assigning the first internet protocol address to a first data path for the connection and to assign the second internet protocol address to a second data path for the connection, wherein at least a part of the first data path belongs to a radio access technology; at least a part of the second data path belongs to the radio access technology; and the part of the first data path is different from the part of the second data path.

Embodiments of the present invention include systems and methods for identifying a primary flow and its corresponding subflow(s) so that the subflow(s) may be routed to more efficiently use bandwidth between a source host and a destination host. In embodiments, a table correlates flows and their corresponding keys for Multipath TCP flows. When a new subflow is initiated between a source device and a destination device, the new flow can be identified as being a subflow of a primary flow using data in the table. Having identified the subflow and its corresponding primary flow, the new subflow may have an installed route path that differs from its primary flow, thereby improving the bandwidth usage.

Some embodiments relate to a user equipment device (UE), and associated methods for performing ROHC header compression on TCP packets with MPTCP option enabled. In some embodiments, a compressor may determine that a first portion of the stream of data packets is formatted according to the transmission control protocol (TCP) with a multipath TCP (MPTCP) option enabled. The compressor may establishcontext with a corresponding decompressor and may operate in one of three modes of compression based on the context. In some embodiments, when the context indicates that the corresponding decompressorsupports decompression of TCP data packets with MPTCP option enabled, the compressor may operate in a first or second mode of compression. In some embodiments, when the context indicates that the corresponding decompressor does not support decompression of TCP data packets with MPTCP option enabled, the compressor may operation in a third mode of compression.

A method is disclosed for exchanging data over a TCP connection (234) between a client node (100) and a networking node (103). The TCP connection comprises a primary MPTCP subflow (122) between a customer premises equipment, a HCPE (101), and a hybrid access gateway, a HAG (102). The method comprises, by the HCPE, converting (410, 413) first TCP segments (401, 406) to first MPTCP segments (402, 405) of the primary MPTCP subflow and vice versa, and using destination address information of the first TCP segments as destination address information of the first MPTCP segments, and using source address information of the first MPTCP segment as source address information of the first TCP segments. The method further comprises, by the HAG, converting (411, 412) second TCP segments (403, 404) to second MPTCP segments (402, 405) of the primary subflow and vice versa while preserving source and destination address information.

A node device for forming a multi-hop network is provided. The node device is configured to support one communication interface or two communication interfaces, a low speed communication interface and a high speed communication interface. The node device participates in a heterogeneous multi-hop wireless network to simultaneously deliver data packets over multipath TCP (MPTCP) paths. A MPTCP path establishment method is provided for node device to build multiple paths to a data center. An adaptive congestion control algorithm is developed for node device to control congestion on a MPTCP path based on path properties such as path length, path bandwidth and path loss. A Markov chain model is provided for IEEE 802.15.4 Non-Slotted CSMA algorithm to compute round trip time on a MPTCP path, wherein a M / M / 1 / K model is applied to compute the queuing time. Based on round trip time computed and adaptive congestion control window computed, a novel path scheduling method is provided for node device to deliver data to data center. The node device includes a transceiver configured to receive and transmit regular data and other packets in a heterogeneous wireless network, a memory configured to store computer executable programs including paths of node device, round trip times for the paths and path information for downstream nodes, and a processor configured to perform steps of the computer executable programs. The steps include building paths and controlling congestion and computing round trip time and scheduling packet transmission.