Abstract: Systems and method are disclosed and among these is a method for mitigation of interference local to remote terminals, and it can include detecting reception of a packet having one of the remote terminals as a destination terminal and, in response, selecting a sub-carrier among the sub-carriers that are not identified as receiving local interference at the destination terminal, and loading, into a queue for the selected sub-carrier, a coded data from which a content of the packet can be derived, and transmitting the queued coded data on the selected sub-carrier. Among disclosed features is a receiving of an interference report that carries an information indicative of a new local interference and, in response, updating the data identifying sub-carriers having local interference at the destination terminal.

Abstract: Methods, systems and devices to authorize access to a simultaneous media streams are described. After a first media stream is initiated with a first client device, an authorization service receives a request to establish the simultaneous second media stream with a second client device. The service determines whether the second client device is at a geographic location where simultaneous streaming is allowed, and grants or denies access to the second simultaneous stream accordingly.

Abstract: A first computer that includes a processor and memory storing instructions executable by the processor—the processor is programmed to: establish a satellite link between a satellite terminal and the first computer, the link comprising at least one radio access bearer (RAB); receive a rejection message from a second computer indicating that the second computer refuses to accept a terminal handover; and in response to receiving the rejection message, transmit to the second computer a pending handover request message comprising an indication of a link quality of the at least one RAB.

Abstract: A telecommunications system includes a network device that detects a communication failure associated with a first communication network and generates a failure command for a remote device to transmit a failure signal over a second communication network. The failure signal represents the communication failure. A method includes detecting a communication failure associated with a first communication network, generating a failure command for a remote device to transmit a failure signal over a second communication network, and transmitting the failure command to the remote device. The network device may take a corrective action in response to receiving a recovery signal from the remote device.

Abstract: A method for reducing retransmission of packets by a sender is disclosed. The method includes: providing a network comprising a physical layer, a medium access control (MAC) layer and an Radio Link Control (RLC) layer; providing a retransmission packet in the physical layer, wherein the retransmission packet comprises a flow having a reordering feature in the RLC layer; enabling Hybrid Automatic Repeat reQuest (HARQ) in the physical layer and the MAC layer; receiving a HARQ request for a retransmission; and transmitting a new packet with the physical layer in response to the HARQ request, when the reordering feature for the flow in the retransmission packet is disabled.

Abstract: Techniques are described for implementing adaptive coding and modulation (ACM) in regenerative satellite systems to adapt the modulation and/or FEC coding of transmitted waveforms to the conditions of the link. In a first implementation, ACM is implemented on an uplink from a terminal to a regenerative satellite. In this implementation, an uplink modulation and coding combination (ModCod) is estimated by the transmitting terminal based on the quality of signals received from the regenerative satellite on the downlink. In a second implementation, ACM may be implemented on a downlink from a regenerative satellite to a terminal. In this implementation, a transmit terminal may insert a field in a transmitted packet header that indicates a downlink ModCod to be used by the regenerative satellite when transmitting packets to a receiving terminal. The regenerative satellite may reencode and remodulate the packet using the ModCod indicated in the field of the packet header.

Abstract: Systems and methods are disclosed, and one includes determining a network resource state, based at least in part on a delay level of the network resource, determining a first priority user demand and a second priority user demand for the network resource, and upon the network resource state meeting a condition, adjusting an allocation of network resource bandwidth to the first priority user and an allocation of network resource bandwidth to the second priority user adjusting. The update of the allocation of network resource bandwidth to the first priority user is based at least in part on a combination of the first priority user demand, the second priority user demand, a first priority user guaranteed bandwidth, and a capacity of the network resource. The update of the allocation of network resource bandwidth to the second priority user is based at least in part on the adjusted allocation of network resource bandwidth to the first priority user.

Abstract: Signal precoding can include: determining a first antenna pattern gain for a beam directed from a first antenna feed on the satellite toward a first user terminal in a first cell and determining a second antenna pattern gain for a beam directed from a second antenna feed on the satellite toward a second user terminal in a second cell adjacent to the first cell; wherein the adjacent cells are partitioned into sectors; determining a first sector location of the first user terminal and a second sector location of the second user terminal; a precoder matrix circuit using the determined first and second antenna pattern gains to calculate a precoder matrix to reduce interference levels caused by the first signal at the second sector and by the second signal at the first sector; and the precoder matrix circuit applying the precoder matrix to the first and second signals.

Abstract: Systems and methods for the preferential selection or blocking of Internet Protocol (IP) version addresses, e.g., IPv4 and IPv6 addresses, are provided. During a process where address or domain name resolution is performed, an entity may access a domain bypass list to ascertain whether or not to proceed with requests utilizing an IPv4 address, an IPv6 address, or neither. Such a list may be dynamically or manually created and/or updated such that known issues associated with the use of a particular type of IP version address can be avoided for subsequent resolution requests to access network resources such as web pages, DNS entries, etc.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for adjusting the transmission power of satellite transceivers based on estimated interference. In some implementations, a satellite transceiver receives a data structure that specifies an interference compensation value for at least one frequency channel on which the satellite transceiver can transmit. The interference compensation value for the frequency channel is based on estimated interference imposed on satellite transmissions transmitted by the transceiver on the frequency channel. The transceiver receives data specifying a second transmit frequency channel to use for a second satellite transmission. A first interference compensation value for a first frequency channel and a second interference compensation value for the second frequency channel are identified from the data structure.

Abstract: Methods and apparatus for increasing spectral efficiency in non-orthogonal multiple access (NOMA) communication, that implement receiving a signal stream from a user, splitting the signal stream into a plurality of sub-streams, applying a forward error coding (FEC) to each one of the sub-streams, and outputting a corresponding plurality of FEC encoded sub-streams. This can include modulating a corresponding carrier with each of the FEC encoded sub-streams, and combining and transmitting the corresponding plurality of modulated carrier signals.

Abstract: A method for controlling congestion of traffic, by one of one or more User Terminals (UTs), traversing an intermediate node, the method comprising: associating one or more traffic flows of a priority to one of the one or more UTs; detecting a traffic congestion for the priority; performing Random Early Detection (RED) congestion control for the priority to relieve the traffic congestion; selecting, for the priority, a User Terminal (UT) with a perceived delay greater than a high threshold; and controlling, by priority, the traffic flows associated with the selected UT.

Abstract: A system and method for controlling uplink power to combat rain fade in satellite communication systems. First communication signals transmitted from a satellite to a satellite operations center are monitored at a gateway. A downlink attenuation level is determined for the first communication signals, and compared to an ideal attenuation level. if the downlink attenuation level exceeds the ideal attenuation level, then a corresponding uplink attenuation level is determined for a second frequency used to transmit second communication signals to the satellite, and converted to a power control command for adjusting an amplifier gain. The second communication signals are transmitted to the satellite at either a compensated power level or a normal power level, depending on whether the downlink attenuation level exceeds the ideal attenuation level.

Abstract: An approach for multi-stream data compression comprises receiving packets of a data stream, wherein the packets comprise respective packets of source data streams compressed on an aggregate basis and in a successive order. A one of the packets is decompressed, and a determination is made whether the packet has been received in a proper order of succession compared to the successive order of compression. When it is determined that the packet has been received in the proper order, the packet is stored at a next location in a decompressor cache. When it is determined that the packet has not been received in the proper order, the packet is stored at a location in the decompressor cache, allowing for subsequent storage of one or more further packets in the proper order of succession, wherein the further packets were processed via the compression process before, but were received after, the one packet.

Abstract: Systems and methods are described for performing Layered Belief LDPC decoding on received Standard Belief LDPC encoded data bursts. In on implementation, a receiver: demodulates a signal, the demodulated signal including a noise corrupted signal derived from a codeword encoded using standard belief LDPC encoding; converts the noise corrupted signal derived from the standard belief LDPC encoded codeword to a noise corrupted signal derived from a layered belief LDPC encoded codeword; and decodes the noise corrupted signal derived from the layered belief LDPC encoded codeword using a layered belief LDPC decoder. In further implementations, systems are described for reducing collisions in Layered Belief LDPC decoders that occur when multiple parity checks need the same soft decision at the same time. In these implementations, elements in an original LBD decoder table are rearranged to increase the distance between elements specifying the same location in a RAM where soft decisions are stored.

Abstract: Systems and methods are provided for increasing or decreasing the transmission speed of a VSAT used in a satellite network. A VSAT may include an ASIC and an FPGA in a transmission block of the VSAT. The ASIC includes an ASIC transmit modulator configured to modulate an input information signal, and circuitry for bypassing at least a portion of the ASIC transmit modulator. The FPGA includes circuitry for receiving a signal bypassing at least a portion of the ASIC transmit modulator, and an FPGA transmit modulator configured to modulate the bypassed signal. In implementations, the system uses the ASIC to burst format an input information signal with a payload burst segment; bypasses a transmit modulator of the ASIC after burst formatting the input information signal with the ASIC; and uses an FPGA to insert additional burst segments into the ASIC burst-formatted signal.

Abstract: Various methods and apparatuses are disclosed, including a method for optimizing FEC code for an average number of interfering users in a multiple access communication, that includes receiving an FEC code optimization information, switchable between at least a first value and a second value, and selecting a first optimized FEC code based at least in part on the FEC code selection information being at the first value, and selecting a second optimized FEC code based at least in part on the FEC code selection information being at the second value. The method can include receiving a source bit stream, encoding bits of the source bit stream according to the selected optimized FEC code into a series of FEC encoded bits, and a parity check matrix of the first optimized FEC code has a first average information bit node degree, and a parity check matrix of the second optimized FEC code has a second average information bit node degree.

Abstract: A multiple access scheme is described. A first bit stream is scrambled from a first terminal according to a first scrambling signature. A second bit stream is scrambled from a second terminal according to a second scrambling signature, wherein the first bit stream and the second bit stream are encoded using a low rate code. The first scrambling signature and the second scrambling signature are assigned, respectively, to the first terminal and the second terminal to provide a multiple access scheme.

Abstract: A telecommunication system includes a resource manager programmed to determine a future location of a first mobile node and a future location of a second mobile node. The resource manager updates a routing table with the future location of the first mobile node and the future location of the second mobile node and transmits the routing table for upload to the first mobile node and the second mobile node.

Abstract: Automatically diagnosing operation of a communication network, including collecting, during multiple time periods spanning multiple days, a plurality of Layer-4 statistics for Layer-4 network connections on the network; determining, for each time period in the multiple time periods, a first Layer-4 condition metric for the time period based on the Layer-4 protocol statistics collected during the time period; determining a network performance indicator, based on a number of the time periods that a first threshold condition is met by the first Layer-4 condition metric; determining whether the communication network has experienced a performance issue based on the network performance indicator meeting a second threshold condition; and causing a diagnostic action, a corrective action, or a maintenance action to be performed based on the determination whether the communication network has experienced a performance issue.