57results about "Frequency-division multiplex details" patented technology

A long-range radio frequency (RF) transceiver-controller module configured to transmit and receive RF signals in one or more of the 433, 868, 915 MHz, and 2.4 and 5.8 GHz Industrial, Scientific and Medical (ISM) frequency bands is provided that is capable of consistently transmitting such signals over a range of 100 metres or more without line of sight, including underground. A wireless control system that comprises a plurality of the long-range RF transceiver-controller modules arranged in a distributed, ad hoc networking topography is also provided. The wireless control system has utility in a wide range of medical, industrial, agricultural, military and commercial applications, including, for example, the management of irrigation systems, manufacturing processes, security systems, sewage treatment and handling systems, hospital management systems.

A network is provided herein comprising a plurality of network resources, and at least one network cluster having a plurality of cluster members. Each member of the cluster may be configured for utilizing one or more of the network resources and for tracking usage thereof. For example, each member of the cluster may include one or more token buckets for tracking that member's usage of the network resources. At least one member of the cluster (i.e., a “reservation coordinator”) may include a first set of computer-executable instructions for receiving network traffic destined for a particular network resource at a first rate (i.e., a maximum average sustained rate). In addition, the reservation coordinator may include a second set of computer-executable instructions for distributing the first rate among at least a subset of the cluster members. In some cases, each member of the cluster may include a third set of computer-executable instructions for changing how the first rate is distributed among members of the subset. For example, the third set of computer-executable instructions may include instructions for attempting to reserve a substantially larger or smaller portion of the first rate.

A method (and system) for managing and controlling allocation and de-allocation of resources based on a guaranteed amount of resource and additional resources based on a best effort for a plurality of customers, includes dynamically allocating server resources for a plurality of customers, such that the resources received by a customer are dynamically controlled and the customer receives a guaranteed minimum amount of resources as specified under a service level agreement (SLA).

A wireless ad-hoc network for transmitting packets to target regions, and a packet transmission method thereof, are provided. The ad-hoc network includes at least one relay node for receiving a packet containing location information of at least two target regions each including at least one node, separating the received packet by the location information, forming a new packet for each instance of the location information separated from the received packet, and forwarding the new packets to corresponding target regions; and a source node for generating the packet containing the location information and transmitting the packet to the relay node. The present invention can reduce the packet transmission overhead, the packet transmission delay, and the power required for the packet transmission. Therefore, the packets can be delivered to the target regions in an efficient manner.

A radio communication apparatus includes a receiving section, a power supply section and a control section. The receiving section receives a radio signal when electric power is supplied, and the radio signal has a preamble field for storing a preamble pattern. The power supply section supplies the electrical power to the receiving section and stopping the supply of the electrical power in response to a supply stop signal. The control section generates the supply stop signal when presence of the preamble pattern can not be detected from the radio signal received by the receiving section, in a state in which a frame synchronization is established.

Techniques that assist in processing of failure detection protocol (FDP) packets. Techniques are provided that assist a CPU of a network device in processing incoming FDP packets. In one embodiment, a module is provided in a network device for detecting and flagging the non-receipt of FDP packets by the network device for one or more FDP sessions. In this manner, the task of detecting non-receipt of FDP packets is offloaded from the CPU of the network device. This enables the network device to support newer FDPs with shorter periodic interval requirements.

A distributed LSR sends data from a first edge LSR, across a non-MPLS network, to a second edge LSR, thereby enabling a non-MPLS network to interface transparently with MPLS networks. This enables a VPN to use a public network to communicate from one portion of the network to another, remote portion. The distributed LSR includes an ingress gateway logically positioned between the first edge LSR and the non-MPLS network. This ingress gateway receives label requests from the first edge LSR. These label requests are multicast to several egress gateways. At least one egress gateway sends a message back indicating that it can transmit data to the destination. In response, the ingress gateway designates that egress gateway to be a designated gateway. The egress gateway then establishes a tunnel through the non-MPLS network to the ingress gateway.

A digital transmission system includes at least a client device and a transmission device, and rate-adjusts the client signal transmitted from the client device to the transmission device before accommodating/multiplexing the signal in a frame. The transmission device includes a rate adjusting unit and a frame processing unit. The rate adjusting unit encapsulates the client signal by using a predetermined frame structure, inserts an idle pattern if necessary, and performs rate adjustment into the bit rate which can be contained in the frame. The frame processing unit accommodates/multiplexes the signal after the rate adjustment. The digital transmission system inserts a bit string of the client signal directly in a payload area of the digital frame, or accommodates and multiplexes it. Alternatively, a specific pattern is accommodated in the payload area, or accommodated and multiplexed after performing a reversible digital signal processing.

In a method of measuring packet loss, a flow of packets is identified at first and second locations in a network. The packets in the flow are counted at each of the first and second locations to provide first and second packet counts, respectively. When a trigger packet in the flow is identified at each of the first and second locations, the first and second packet counts are latched to provide latched first and second packet counts corresponding to same packets in the flow. The latched first and second packet counts are compared to measure packet loss between the first and second locations.

The present invention relates to a method, terminal device, network element, system and computer program product for handling measurement reports in a communication network. At least two different levels of measurements reports (15) are provided, wherein each of the at least two levels corresponds to a different amount of resource blocks on which the measurement reports are based. The level of a received measurement report (15) is detected and a compensation offset is selected based on the detection result and applied to the measurement report. Thereby, measurement errors and biases of the measurement reports can be dynamically corrected in multi-level reporting schemes.

A passive optical network (PON) including an optical line termination (OLT) and a plurality of optical network units (ONUs) which are connected. The optical line termination includes a band setting control section; an upstream control cell receiving section; a use right transmitting section; and a downstream control cell transmitting section. Each of the plurality of optical network units includes a downstream control cell receiving section; a use right acquisition determining section; and an upstream control cell transmitting section.

The present invention discloses a Discontinuous Reception (DRX) parameter configuration method for facilitating Automatic Neighbor Relation (ANR) measurement. The method comprises determining a traffic intensity of a User Equipment (UE) by which a DRX-based ANR measurement is to be performed. The method further comprises setting a value for a DRX parameter to be used by the UE to perform the DRX-based ANR measurement, in accordance with the determined traffic intensity of the UE. The method further comprises transmitting the value set for the DRX parameter to the UE. The present invention further provides an associated BS adapted to perform DRX parameter configuration to facilitate ANR measurement.

A method of providing a list of digital control channel (DCCH) frequencies that are in use in a radio telecommunications network to a mobile station operating in the network. Each DCCH includes a superframe having an extended broadcast control channel (E-BCCH) time slot which is broadcast in an E-BCCH cycle. The method begins by dividing the list of DCCH frequencies into a plurality of DCCH subsets, and sequentially or randomly broadcasting the DCCH subsets to the mobile station in the E-BCCH time slot of the DCCH. The next DCCH subset is broadcast when the current E-BCCH cycle is completed. Alternatively, the next DCCH subset may be broadcast when a timer expires. In this case, a broadcast control channel (BCCH) change notification (BCN) indicator is changed whenever a new subset is broadcast. A DCCH Frequency Plan message is added to IS-136, and includes a DCCH subset, an associated DCCH Frequency List Subset Sequence Identifier (SSI), and information elements to identify the System Operator Code (SOC) and System Identifier (SID).

The present invention relates to a method and apparatus for determining radio link failure between the UE and the eNB in a wireless communication system. Particularly, the present invention provides a method and apparatus for determining radio link failure efficiently in such a way that the UE measures the radio link quality of the anchor carrier, the radio link qualities of the aggregated carriers, and the radio link quality of neighbor cells in order, and determines whether the radio link quality fulfills a predetermined condition.

A session identification unit (11) determines a session to which an incoming packet belongs, while a session relay unit (12-1-12-N) relays between a session with a transmission terminal and a session with a reception terminal. A packet scheduler (13) instructs and controls the delivery of packets from each session relay unit (12-1-12-N), and a delivery control unit (14) delivers packets from each session relay unit (12-1-12-N) based on the instruction. In the session relay unit (12-1), a transmission session processing unit (121-1) processes a session for transmitting data to the reception terminal, and a transmission buffer (122-1) stores received data until the end of a transmission. A reception session processing unit (123-1) processes a session for receiving data from the transmission terminal.

Relay station (200) in a communication system using PCells and Scells for backhaul communication, and configuring DL BHSFs of the PCell, and UL BHSFs of the PCell located after a prescribed number of subframes after a DL BHSF includes: ACK/NACK generator (203) generating a response signal for a downlink signal received in PCell and SCells from base station (100); transmitter (205) transmitting a response signal in response to a downlink signal received in an SCell in a DL BHSF configured at a timing different from that of the DL BHSF of the PCell, the response signal in UL BHSFs of the SCell a prescribed number of subframes after the DL BHSF, and a response signal for a downlink signal received in an SCell in a DL BHSF having the same timing as that of the DL BHSF of the PCell, and the response in a UL BHSF of the PCell.

A loopback test to test a communication link for a layered interface where in a master agent programs the electrical parameters for the slave agent, such as, the offset, timing, and current compensation with a loopback control register. The slave agent's transmitter and receiver are independently controlled and the master agent may use a slave-echoed data test pattern to detect errors and subsequently sets the appropriate status bits in a loop back status register

The present invention discloses a method and a device for transmitting data. According to the technical solution provided by the present invention, no actual end-to-end multi-bearer connection is established between a terminal and a network side, but the terminal, when locally transmitting a data packet, simulates a multi-bearer mechanism to establish multiple virtual service channels on a bearer and performs priority-based scheduling between the service channels. Through virtual multi-bearer, the present invention can balance service QoS with resource utilization under the condition that the network or the terminal does not support the multi-bearer capability or the multi-bearer capability is restricted.

Disclosed is a demultiplexer for demultiplexing a multiplexed stream, obtained on time division multiplexing a plurality of elementary streams. A buffer controller, forming this demultiplexer, writes a multiplexed stream, beginning from a location specified by a data write pointer of a ring buffer, configured for storing data of the multiplexed stream, in the manner of an endless loop. On receipt of an ES1 readout request, an ES1 readout control unit takes out, from an ES1 readout pointer storage unit, a readout pointer, as a start point of retrieving an area in the ring buffer where the oldest ES1 is stored. The ES1 readout control unit then retrieves and reads out the ES1, with a location specified by the ES1 readout pointer, as a start point, and sends the ES1, thus read out, to the source of the request. The ES1 readout control unit then updates the ES1 readout pointer and the data leading end pointer.

A method of transmitting voice frames, via a transmission channel reserved for voice data, by a transmitting terminal generating voice frames using a voice signal is proposed. Such a method includes steps of: obtaining non-voice data; selecting voice data from the voice frame according to configuration data obtained beforehand relative to the transmission of non-voice data on the reserved channel; constructing of a degraded voice frame by replacing selected voice data with non-voice data; transmitting the degraded voice frame via the reserved channel to a receiving terminal. On the receiving terminal side, a method of managing voice frames coming from the transmitting terminal is proposed including the steps of: detecting a non-voice data header included in the voice frame; extracting, from the voice frame, of non-voice data, according to configuration data read in the header; transmitting of extracted non-voice data to a processor of non-voice data.

A master-slave communication system for a communication switch is provided. The system comprises a master controller generating commands and receiving status signals and slave devices associated with the master controller. Each slave receives commands, executes local commands responsive to the commands and generates status signals for the master controller. Each slave has a communication arrangement for signals transmitted between it and the master controller. The arrangement comprises a communication controller associated with the master controller. The communication controller receives commands, transmits commands to each slave, receives status signals and provides information relating to the status signals to the master controller; also the controller has a communication link which transmits commands to each slave and the status signals to the controller. The system allows local commands executed by the slaves to replace other commands directed by the master controller to the slave. Further, each slave communicates independently with the master controller.

A system and method of retaining synchronization in a shared medium communications network. Synchronization is maintained between colliding transmitters and receivers by providing a Collision Based Inter Frame Space (CBIFS) which is a time period at least as long as the longest frame and that starts from a point in time common to all nodes such as after the backoff period (beginning of the PHY header). After a collision is detected in either a transmitting or receiving node, the node waits the remaining time in the CBIFS period. For transmitters the node waits the remaining time period from the end of the frame transmission until the CBIFS period terminates. For receivers, the node waits from the end of the preamble until the CBIFS period terminates.

This invention relates to a transmission controlling apparatus, a transmission controlling method, a recording medium, and a program for instantaneously transmitting data while averting a so-called slow start. Video data acquired by a picture acquisition unit 21 is input to an initial rate determination unit 24 and a picture encoding unit 22 as outgoing data. An acceptable picture quality determination unit in the initial rate determination unit 24 determines a minimum acceptable picture quality acceptable to a user who views the video data sent from a transmission unit 11. A transmission rate determination unit in the initial rate determination unit 24 determines as an initial transmission rate the transmission rate that meets criteria for the minimum acceptable picture quality supplied from the acceptable picture quality determination unit, and forwards the determined rate to a rate control unit 25. In turn, the rate control unit 25 controls the transmission rate for a transmission unit 23 so that the unit 23 starts to send video data at the initial transmission rate supplied from the transmission rate determination unit 44. This invention applies illustratively to transmitting apparatuses for transmitting predetermined data.