Abstract: This invention provides an improved address management scheme in a mobile router (MR) that connects a mobile network into the Internet via an access network. The MR performs neighbor advertisement on behalf of mobile network nodes (MNNs) within the mobile network so that packets directed towards the MNNs are routed correctly to the MR, and then to the corresponding MNN, while maintaining standard address management procedures, such as IPv6 address management procedures, in the access network and in the mobile network.

Abstract: A method includes connecting a mobile router (MR), also referred to herein as a gateway mobile terminal, of a mobile network (MONET) to an access point (AP) of an access network (AN) that includes an Access Router (AR); making a request to obtain a plurality of link addresses from a link address manager of the AN; allocating individual ones of the plurality of link addresses to individual ones of network nodes of the MONET; and performing a neighbor discovery procedure with the AR to send at least one neighbor advertisement to declare the allocated individual ones of the assigned plurality of link addresses. In one embodiment the request is made to obtain a set of link layer addresses (LLAs) that are allocated to individual ones of the network nodes, while in another embodiment the request is made to obtain a group identification (Group_ID) that is used to formulate a set of LLAs that are allocated to individual ones of the network nodes.

Abstract: A “loose ACK” method by which a radio access network of a cellular network monitors wireless transmission of packets according to a layered protocol including a radio layer (near the physical layer) and an upper layer, the method including: a step (23) of slow release—in what is called normal buffer management—in which the upper layer removes from a buffer maintained by the upper layer the oldest packet in the buffer when the buffer is full and a new packet arrives, and does so independently of whether the packet being removed has been acknowledged by the radio layer of the terminal; and a step (24) of local acknowledgement in which the radio layer sends an acknowledgement to the upper layer on the occurrence of a predetermined event. The local acknowledgement can trigger either special mode buffer management or release of the buffer to a target (entity or layer).

Abstract: According to the invention, information in clear text is added to a data packet transmitted from a sender to a receiver with end-to-end security in an IP network, which information indicate encrypted data fields in payload data of the packet and/or instruct an intermediate node located on a path between the sender and the receiver how to process the packet, wherein the part of the packet in which the information is provided is different from payload data.

Abstract: A method for compressing information in a communication system is provided. The method comprising the step of compressing first address data in a first packet stream by using second address data included in a second packet stream.

Abstract: A method of optimizing the compression efficiency in a packet data communication where a compression history of previous packets is used for the compression of a current packet, the method including: updating the compression history selectively, wherein the selection is performed based on a first algorithm whether a packet shall be compressed, and on a second algorithm whether a compressed packet shall be used for an update of the compression history. The compressor can be enabled to safely infer a subset of the context at the decompressor by simply monitoring the Transmission Control Protocol acknowledgment signaling, wherein that subset is used as a context for compression.

Abstract: The invention is a system and method for synchronizing the transmission of compressed headers in data packets between a transmitter and a receiver having a preferred wireless application which is an improvement of RFC2508. In a system having a transmitter transmitting a plurality of packets each containing a header to a receiver, a method of synchronizing the transmission of compressed headers between the transmitter and receiver in accordance with the invention includes transmitting a current packet from the transmitter to the receiver containing information that the transmitter is prepared to send subsequently transmitted packets in which the headers therein are to be compressed in comparison to the header contained in the current packet; and transmitting from the receiver to the transmitter an acknowledgment packet that the receiver has received the current packet.

Abstract: A method for scheduling data packets from a plurality of flows into a single flow. Data packets are broken into data segments and assigned a slack value based on how long the segment can wait until transmission begins. Every time a transmission opportunity passes, the slack value of the segment is decreased. The scheduler prioritizes the segments based on their slack value.

Abstract: A method and equipment for accelerating throughput of communication segments from a sender (30) to a receiver (40) each of which include a protocol layer (30a 40a) for providing such segments, the method in case of TCP including a first step (20a) in which the sender protocol layer (30a) 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 (20c) 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 (30a) then increments cwnd at one or another predetermined rate—depending on whether the start immediately follows a new connection or instead follows a transfer of an existing connection to a new path—in respect to received ACKs.

Abstract: The link layer (68, 64) of the sending end of a wireless link (66) is enhanced (10, 74) by providing a mechanism for discriminating (36, 38; 79, 82) between special, critical or otherwise important packets from among a plurality of packets send over the wireless link. Special link layer treatment (42; 89) is accorded to such special, critical or otherwise important packets, while the remaining packets are subjected to normal link layer treatment (44; 86) before transmission over the wireless link.

Abstract: The invention is a method and system for compressing a current value into a minimum number of bits for transmission from a compressor to a decompressor. A method in accordance with the invention includes maintaining a series of at least one previous value at the compressor, each previous value having different k least significant bits and which have been transmitted to the decompressor; determining a value of k representing a smallest number of bits which allows successful decompression of the current value at the decompressor using as a reference value any value in the series of at least one previous value; and transmitting the current value from the compressor to the decompressor in compressed form with the k least significant bits of the current value.

Abstract: 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 (30) and a receiving network host (40).

Abstract: The present invention relates to a method and system for early compression of a header portion of data packet(s) transmitted after establishment of a packet data connection. A compression information is obtained from a signaling used to establish at least a part of said packet data connection, and is used for the early compression of the header portion. Thereby, even the first data packet(s) can header-compressed to thereby enhance compression efficiency and reduce delay in transmission-window based packet connections with a slow start phase.

Abstract: A method and apparatus operable in a system having a transmitter and receiver for reducing the overhead for compressing headers of a plurality of packets that form a transmission unit, wherein the header of each packet includes identification (ID) information identifying the packets as part of the transmission unit. The invention operates by reassembling the packets that form the transmission unit and removing the ID information from the header of each of the packets that form the transmission unit. After removing the ID information from the header of each packets, the headers of the packets are compressed and the packets having the compressed headers are transmitted from the transmitter to a receiver. The receiver upon receiving the packets having the compressed headers, decompresses the compressed headers to obtain the packets that form the transmission unit.

Abstract: 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 said 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 said 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 said layers according to information forwarded from said higher one of said layers to said lower one of said layers, transmitting packet data from the transmitter via the interface

Abstract: A timer based header compression/decompression technique and timer and reference based technique are provided. A source generates a header field, such as an RTP time stamp. A packet including the header field is sent to a compressor which calculates a compressed header field based on the header field of the packet from the source and a jitter quantity. The compressed header field is calculated by calculating a jitter effect the network before the compressor has on the transmission of packets and calculating a jitter effect the network between the compressor and a decompressor has on the transmission of packets. The packet including the compressed header field is transmitted to a decompressor which includes a local timer. The decompressor decompresses the compressed header field by calculating an approximation of the header field based on the elapsed time since the arrival of a previous packet and the field value in the previous packet.

Abstract: A mobile station (100) and a compression/decompression node in a wireless network (5), preferably the GGSN 30 (30), agree on whether to apply compression/decompression, and what compression/decompression scheme to use either by pre-configuration (when the GGSN 30 is in the home network of the mobile terminal) or by signalling (when the GGSN 30 is 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.

Abstract: A method, computer program, and apparatus for allowing endpoints to move between zones of a packet-switched network. In the invention, a communication between local and remote endpoints are established via a first gatekeeper, which services a first zone of the packet-switched network, when the local endpoint is at a location serviced by the first zone of the packet-switched network. When the local endpoint moves to a location serviced by a second zone of the packet-switched network, subsequent to the initial hand-off, communication between the local and remote endpoints is maintained via the first gatekeeper and a second gatekeeper which services the second zone of the packet-switched network, by performing an initial hand-off communication control functions from the first gatekeeper to the second gatekeeper.

Abstract: The invention relates to a method and system for providing allocation of resources depending on the characteristics of the flow request. The system allocates resources based upon at least one of the parameters class of service, delay requirement and bandwidth requirement of the flow request. During a call process, the system keeps updating the service rate allocated to meet the QoS requirement of a new flow request, the updated service rate being allocated to a new flow request of the same type. The system learns the traffic pattern and adjusts a current airlink performance to allocate a service rate to flows.

Abstract: Apparatus, and associated method, converts real-time multimedia information generated pursuant to an RTP protocol into a form amenable for transmission upon a radio channel, such as a radio channel defined in a cellular communication system. When converted, the informational content of the multimedia information is transmitted in a manner that achieves spectral efficiency and low, constant delay. Once transmitted over the radio channel, the multimedia information is converted back into form corresponding to the RTP protocol before being sent to the receiving station.