Nokia Corporation

Nokia Siemens Networks Oy

Spyder Navigations LLC

Yogesh Swami

Khiem Le

Yousuf Saifullah

Shashikant Maheshwari

Naveen Kumar Kakani

Jianzhong Zhang

Haihong Zheng

Franck Le

Srinivas Sreemanthula

The invention proposes a method for controlling a packet transmission between a sender and a receiver sent via a packet transport protocol, the receiver being a mobile network element, comprising the steps of detecting whether a mobility event has occurred, detecting whether a downlink packet loss has occurred, and providing, in case a mobility event and a packet loss has been detected, an indication to the sender that a packet loss due to mobility has occurred.

Terminal based packet loss due to mobility detection

The present invention provides an enhanced H-ARQ scheme that optimizes bandwidth utilization and spectrum efficiency. When an H-ARQ attempt is unsuccessful due to loss or error over a hop between the BS and MS/SS, then only the first node in the hop chain that fails to decode the packet transmits another H-ARQ attempt. The BS determines the first node that fails on decoding based on certain information such as the feedback information sent from the nodes on the path. The previous node of the failed node is then instructed to retransmit by the BS.

Bandwidth efficient HARQ scheme in relay network

Various example embodiments are disclosed relating to efficient techniques for error detection and authentication in wireless networks. For example, according to an example embodiment, an apparatus adapted for wireless communication in a wireless network may include a processor. The processor may be configured to transmit a message including a field to provide both authentication and error detection for the message. The field may include an authenticated checksum sequence.

Efficient techniques for error detection and authentication in wireless networks

A mobile station () and a compression/decompression node in a wireless network (), preferably the GGSN(), agree on whether to apply compression/decompression, and what compression/decompression scheme to use either by pre-configuration (when the GGSNis in the home network of the mobile terminal) or by signalling (when the GGSNis in a visited or a roamed-to network). Additional information, such as a profile-specific dictionary, may be used to increase the compression efficiency, particularly during start-up. Dynamic data can also be accommodated. The compression/decompression may be turned on and off on a packet-by-packet basis, depending on whether the compression actually results in a smaller packet. A compressed/uncompressed indicator bit or bits can be inserted explicitly on a per packet basis, and/or the compressed/uncompressed indication can be derived implicitly. A desired data compression/decompression algorithm, or any desired Proprietary Feature, can be signaled, possible without requiring standardization changes, by using a Packet Data Protocol PDP Context Activation message with a predetermined Access Point Name (APN) message information element that is sent from a first network element to a second network element for at least identifying the desired compression/decompression algorithm. It another embodiment, for the case where Proprietary Feature capability is exchanged between a RAN and a UE network element, a transmission of an extension to a UE Capability Enquiry message is sent to the UE for identifying the Proprietary Feature.

Wireless communications system having built-in packet data compression and support for enabling non-standard features between network elements

An improved scheduling mechanism usable for a data transmission in a packet based network is provided. A plurality of connections is detected, and for each of the connections, a buffer occupancy level is determined. Then, the connections having a smaller buffer occupancy level are prioritized in comparison to the other connections, and packets of the plurality of connections are scheduled on the basis of the result of the prioritizing. The scheduling mechanism is implemented in a network element of the packet based network or in a sender and receiver.

Expedited data transmission in packet based network

A method for operating a firewall includes: in response to the firewall receiving a TCP SYN request packet that is sent towards a first node from a second node, the TCP SYN request packet comprising a sequence value ('seq'), sending to the second node a SYN|ACK packet, the SYN|ACK packet comprising a seq and an ack_sequence value ('ack_seq'), where ack_seq of the SYN|ACK packet is not equal to the TCP SYN request packet's seq+1; and in response to the firewall receiving a TCP RST packet from the second node, verifying that the seq in the TCP RST packet matches the ack_seq of the SYN|ACK packet and, if it does, designating the connection with the second node as an authorized connection.

Apparatus, method and computer program product to reduce TCP flooding attacks while conserving wireless network bandwidth

A system, apparatus, and method for determining network capacity and managing network congestion in response to a change in an end-to-end communication path between sender and receiver hosts. A receiver mobility notification is provided by the receiver host to the sender host. The sender host determines whether the receiver host has moved between networks or sub-networks using the receiver mobility notification. If the sender host determines that the receiver host has moved from one network/subnet to another network/subnet, a congestion state at the sender host is reset to correspond to the new end-to-end communication path established between the sender host and the receiver host in the new subnet.

System and method for movement detection and congestion response for transport layer protocol

A method and system for employing the time stamp and SACK options in TCP and SCTP to modify their operation to initially only send new or lost packets, after a network timeout has occurred. Wireless network resources are saved by reducing the number of packets that are resent to a destination. In particular, the invention detects whether an acknowledgement from a destination is associated with the originally sent packet or a resent packet and uses this information to modify the operation of the protocol to reduce congestion on the network.

Method and system for throughput and efficiency enhancement of a packet based protocol in a wireless network

A method and equipment for accelerating throughput of communication segments from a sender () to a receiver () each of which include a protocol layer () for providing such segments, the method in case of TCP including a first step () in which the sender protocol layer () initializes a congestion window (cwnd) to some initial size (iwnd) and increases the congestion window by one segment each time it receives an ACK, but upon receiving an indication of low congestion, performs a step () of accelerated start in which it sets a slow start threshold (SSTHRES) to a standard initial value (typically 65535) and re-initializes cwnd to a new value, and the sender protocol layer () then increments cwnd at one or another predetermined rate&#x2014;depending on whether the start immediately follows a new connection or instead follows a transfer of an existing connection to a new path&#x2014;in respect to received ACKs.

Method and apparatus for accelerating throughput in a wireless or other telecommunication system

A system, apparatus, and method for providing secure loss recovery for packet loss due to bit errors and other non-congestion-related packet loss occurring over the communication link. An intermediary node in a network between a sending node and a receiving node identifies packet loss due to bit errors (PLB), or other non-congestion-based packet loss, over a network connection between the sending module and the network node. A loss notification signal is sent from the network node to the sending module in response to identification of the non-congestion-based packet loss. The PLB is verified at the sending module. A first loss recovery procedure is performed, different from a second loss recovery procedure associated with congestion-based packet loss, if the PLB is verified at the sending module.

System and method for optimizing link throughput in response to non-congestion-related packet loss

The present invention concerns a data communication method for communicating packetized data via an interface between a transmitter and a receiver, wherein communication relies on a layered communication protocol stack comprising at least two protocol layers of different hierarchy level, wherein at least data communication on a lower one of the layers adopts a retransmission scheme for data packets for which an acknowledgment of receipt was not received at the transmitter, the method comprising the steps of initializing the retransmission scheme of the lower one of the layers by setting a condition parameter, wherein fulfilling the condition defined by the condition parameter represents an indication as to how to control the retransmission scheme, wherein initializing comprises setting said condition parameter of the lower one of the layers according to information forwarded from the higher one of said layers to the lower one of said layers, transmitting packet data from the transmitter via the interface to the receiver according to the retransmission scheme of the lower one of the layers, detecting that the condition is fulfilled during transmitting, and controlling said retransmission scheme of the lower one of said layers in response to the detecting.

Data communication method, system, and transmitter and receiver constituting the system

The link layer ( ) of the sending end of a wireless link ( ) is enhanced ( ) by providing a mechanism for discriminating ( ) between special, critical or otherwise important packets from among a plurality of packets send over the wireless link. Special link layer treatment ( ) is accorded to such special, critical or otherwise important packets, while the remaining packets are subjected to normal link layer treatment ( ) before transmission over the wireless link.

Enhanced transmission of critical data

An accelerated slow-start enables fast recovery from a packet delay or loss condition or even from a deliberate suspension of service in an Internet connection in which a wireless link exists between a sending mobile host ( ) and a receiving network host ( ).

Growing community of inventors

Irving, TX, United States of America

Yogesh Swami