Abstract: Described are a method and system for generating an asynchronous data frame. A character received from an asynchronous device is buffered. Each additional character from the asynchronous device is buffered if the additional character is received before the expiration of a predetermined interval measured from a time when a last buffered character was received. The one or more buffered characters are assembled as a data frame after the expiration of the predetermined interval if no additional character is received from the asynchronous device before the expiration of the predetermined interval. An encapsulated TCP packet that includes the data frame is generated for transmission across a TCP/IP network to a remote device.

Abstract: A scheduling algorithm is disclosed that allows mobile units, participating in an ongoing communications session, to temporary perform channel-demanding communications operations without ending the session and that is useful in the case of no free radio channels. The algorithm is based on selecting a radio channel for transmitting a radio block based on information of a previous radio channel, no which a previous radio block has been transmitted. The radio block and the previous radio block are based on common information. A mobile unit participating in the communications session selects whether to perform any channel-demanding communications operations on the selected radio channel. By limiting any such other channel-demanding operations to only the selected radio channel, the probability of loss of useful data for the mobile unit during the communications session is minimized.

Abstract: In a communication system subject to variations in channel quality, transmit power control is used to reduce the variations in received signal quality. If the channel quality degrades to such an extent that a high transmit power would be required to ensure good received signal quality, the transmit power is decreased and is not increased until the channel quality recovers sufficiently to enable an acceptable transmit power level to be used. While the power is at the decreased level, transmission of a data block may continue, or may be suspended, with the data block being truncated if the whole block has not been transmitted by the end of the time period available for transmission of the data block.

Abstract: A method of aggregating network traffic flows for network traffic elements is described. The traffic elements are characterized by a plurality of characteristics having respective values, where a flow profile is formed by classifying each element into one of a plurality of flows dependent on its characteristic value. The method comprises the steps of obtaining an instantaneous flow profile and aggregating flows from the flow profile having a common value for a characteristic.

Abstract: Algorithms and data structure are described for constructing and maintaining a clock distribution tree (“CDT”) for timing loop avoidance. The CDT algorithms and data structure allows a node to make an automated and unattended path switch to the most desirable clock source in the network. In response to a network topology change, a clock root node distributes new clock paths to all nodes in the network. In particular, the root node calculates a new clock path for each affected node by building a clock source topology tree, and identifying from that tree a path to the network node from a clock source of higher or equal stratum relative to that network node. The root node then sends a network message to each node indicating the new path that the node should use. Each node receives the message and compares the new path with the existing path. If the paths are different then the node acquires the new path just received in the message. If the paths are the same then the node does nothing and discards the message.

Abstract: In a wireless network comprising access points deployed within a designated zone of coverage, the radio frequency field strength resulting from radiation from the access points is optimised as a function of location by means of control of the transmission power and/or radiation pattern of the access points in response to measurements from sensors at defined locations that measure received signal power, the received power being related to radio frequency field strength. Sensors may be deployed within the designated zone of coverage, at the edge of the zone and/or outside the zone and optimization of the transmission parameters of the access points in terms of transmission power and/or radiation pattern is carried out taking into account the location of the sensors in addition to the received power at the sensors.

Abstract: The present invention provides a communication network in which data can be routed from a terminal to a WAN over a plurality of communication links, the communication links connecting a plurality of terminals to the WAN and all of the terminals being interconnected by a LAN.

Abstract: A network device includes a group of interfaces. Each interface is associated with at least one other interface of the group of interfaces and a group of network addresses. Each interface is configured to monitor at least one of the group of network addresses with which the each interface is associated or the at least one other interface with which the each interface is associated, and determine whether to logically shut down based on the monitoring.

Abstract: A method and apparatus for hopping of a Code Division Multiple Access (CDMA) control segment that carries control information in an Orthogonal Frequency Division Multiple Access (OFDMA) packet data mobile communication system are provided, in which a number of CDMA control segment hopping zones, each CDMA control segment hopping zone representing a frequency area for CDMA control segment hopping, is determined according to a total number of available tiles in the system and a number of tiles per CDMA control segment, each tile including a predetermined number of subcarriers, or according to a total number of available subcarriers in the system and a number of subcarriers per CDMA control segment. Start points of the hopping zones are determined using the number of the hopping zones, and the control information is transmitted or received in the CDMA control segment through hopping of the CDMA control segment over the hopping zones using the start points.

Abstract: A method, and apparatus, and logic encoded in one or more computer-readable tangible medium to carry out a method of determining a breakpoint position in an ordered sequence of quantized transform coefficients of a block of image data for a hybrid variable length coding the ordered sequence. The breakpoint location in the sequence is between a low-frequency region and a high-frequency region. The hybrid variable length coding method includes coding the low-frequency region using a selected low-frequency variable length coding method; coding the high-frequency region using a selected high-frequency variable length coding method; and coding the position in the sequence of the breakpoint. The breakpoint location is determining uses a relatively simple and fast method based on pre-defined cost criteria. A method is included that instead of coding the breakpoint separately, codes the breakpoint jointly with coefficient events.

Abstract: Systematic transmit IQ phase and amplitude imbalances in the transmit chain of a wireless local area network (WLAN) cause a corresponding systematic shift in the roots of a constellation diagram. Additional random phase noise in the transmit chain will cause a further Gaussian distribution of points in the constellation diagram about the systematically shifted roots. This random distribution represents a true error vector magnitude (EVM). By transmitting a known training sequence through the transmit chain, which it is known will be shifted to all of the systematically shifted roots in the constellation diagram, the Gaussian spread around those shifted roots can be analysed to determine the true EVM.

Abstract: A method and apparatus for selecting a radio bearer type for providing a service to a plurality of mobile terminals according to a count of mobile terminals obtained through responses to a service response request message from a network is provided. An MBMS radio bearer type is selected according to a count that includes RRC-connected mobile terminals that still need to establish a connection in order to receive an MBMS such that the radio bearer type established is sufficient to provide the MBMS to all mobile terminals desiring to receive the service.

Abstract: A method and apparatus for dynamically modifying routing information in an interconnect architecture without quiescence is herein described. Each agent/node holds routing information regarding target agents/nodes in an interconnect architecture, which may include routing preferences. When a node is to be hot removed, it generates port disable messages to neighbors. The neighbors disable a port the disable message is received on and generates a completion message back to the not to be removed. The node to be removed continues to route messages until it receives a completion; at which time it disables a corresponding node. When all nodes are disabled the device may be removed. Other nodes in the interconnect architecture learn of an agent removal through use of return cycles when messages reach dead ends during attempted routing of cycles. Furthermore, hot addition of a node includes broadcasting of an enable message to enable nodes for routing to the added node.

Abstract: A multiplexing system (10) is provided which includes a plurality of encoders (12-15) which generates elementary streams, respectively, CPU (16), multiplexer (17), instruction memory (18), and a data memory (19) which stores a plurality of elementary data to be multiplexed. Each of the encoders (12-15) divides elementary data into units, and stores the data into the data memory (19). The CPU (16) generates, for each of the data units, instruction data having stated therein a storage location in the data memory (19) and stores the instruction data into the instruction memory (18). The multiplexer (17) reads the instruction data one by one from the instruction memory (18), and reads data units stated in the instruction data sequentially from the data memory (19), for generation of a multiplexed stream. Thus, the burden of processing to the controller can be lessened.

Abstract: A method for mapping a physical downlink control format indicator channel to physical resources includes the steps that 16 modulated data y(0), y(1), . . . , y(15) of a downlink control signaling indicator channel in an LTE system are divided into 4 groups in order and mapped by groups, which allows the downlink control format indicator channel to be mapped exactly to the continuous 4 resource elements recombined by resources which are divided among all system physical resources except the pilots according to such continuous 4 resource elements. By defining group mapping rules, this method can offer the maximum gain of frequency selectivity.

Abstract: Methods, systems, and computer program products for implementing bandwidth control services are provided. The method includes assigning a quality of service preference to a device. The method also includes associating a service session with the device. The method further includes executing a control action for at least one other simultaneously occurring service session when a quality of service level of the service session differs from the quality of service preference by a specified degree. The control action is operable for producing and maintaining the quality of service preference.

Abstract: A communications system (20) includes a resource controller (22) and a terminal (24) in communication with the resource controller (22). Periodically, the resource controller (22) sends a service announcement (46) that identifies a set (50) of timeslots (52) within a communication resource (40) configured for random access within a future frame (42). The terminal (24) ascertains a burst characteristic (118) of a message (54) to be sent from the terminal (24) and generates a random access parameter (128). The terminal (24) selects one of the timeslots (52) from the set (50) in accordance with the random access parameter (128), the timeslot exhibiting a burst type (62) corresponding to the burst characteristic (118) of the message (54). The terminal (24) transmits the message (54) in the selected timeslot (52).

Abstract: An automated telecommunications backup system includes a first system operable to monitor a primary time division multiplexing (TDM) link on a TDM network for a failure condition and a second system operable to back up at least a portion of the telecommunications traffic of the TDM link over a backup network. The backup network may be a packet based network, an Internet protocol (IP) based network, a satellite based network, or an IP based system over a satellite network. The first system may continuously monitor the primary TDM link and switch the functionality thereof into circuit with the TDM link upon the detection of the failure condition. The second system may compress the telecommunications traffic of the TDM link to transmit a pre-designated number of time slots thereof.

Abstract: The streaming of video data to mobile devices (101 to 103) is shown in which a support server (106) and an asset server (107, 108) are provided. The support server receives a first request (303) from a mobile device for a selected video asset. The support server relays (304, 305) the first request to the asset server. The asset server serves (306) the selected video stream to the requesting mobile device from the start of the asset. The support server is halted (307) from streaming video and the asset server provides an indication (308) of the halt position to the support server. The support server records an indication of the mobile device and the halt position of the asset. The support server receives a second request (311) from the mobile device for the selected asset. The support server relays (310 to 313) the selected request to the asset server and the asset server serves (314) the selected asset as a video stream to the requesting mobile device from the previous halt position.

Abstract: Systems and methods for facilitating automatic configuration of network devices for network services are disclosed. In one of many possible embodiments, a request for information for configuring a network device is received from a requesting device. The request is in a first protocol format. The information is retrieved from a directory subsystem in a second protocol format. The retrieved information is converted from the second protocol format to the first protocol format. The converted information is transmitted in the first protocol format to the requesting device in response to the request.