Abstract: A method and system for assigning downlink and uplink channels to a mobile station registered with a base station, which uses an interference-sensing scheme and which provides improved reliability and performance over conventional schemes.

Abstract: A code-division-multiple-access (CDMA) system employing spread-spectrum modulation. The CDMA system has a base station (BS), and a plurality of subscriber units. The signals transmitted between the base station and subscriber unit use spread-spectrum modulation. The improvement method for adaptive reverse power control (APC) from a subscriber unit (SU) to a base station (BS), comprises the steps of sending from the subscriber unit, using spread-spectrum modulation, a SU-spreading code on a reverse channel. The base station despreads the SU-spreading code on the reverse channel as a despread signal, determines a first power level Pd which includes power of the despread signal plus noise and a second power level PN, which includes despread-noise power.

Abstract: A cell processing method and apparatus in an ATM switch can reduce or prevent cell loss and throughput deterioration of the switch caused by HOL blocking. The cell processing method can include storing unicast cells and multicast cells in a shared buffer memory and storing addresses of the respective cells in different address queues, assigning respective priorities to the cells stored in the shared buffer memory, reading out the cells from the shared buffer memory according to the assigned priorities, and sending the cells read out from the shared buffer memory to fan-out ports and determining the cell to be output when multiple cells reach a fan-out port. The processing apparatus can include a buffer that stores cells inputted to the ATM switch, multicast connection identifier (MCI) address queues that store buffer addresses of multicast cells and unicast address queues for storing buffer addresses of unicast cells.

Abstract: Disclosed is an interface and method for data transmission between digital and radio frequency (RF) components of a base station. The interface and method involves transmitting transmit or receive data over a first set of time slots and transmitting various uplink or downlink low rate static/control signals over a second set of time slots. The transmit data includes in-phase transmit data bits and quadrature phase transmit bits, and the receive data includes in-phase transmit data bits and quadrature phase transmit bits received over a diversity antenna system.

Abstract: In a network-device control system for controlling a network device such as a router, which is located between a communication terminal employed by a user and a server with which the terminal communicates, at a priority that has been set in advance for the user or for an application, an event notification device detects that a user has logged in to the communication terminal or that the user has launched a predetermined application from the communication terminal and reports the user identifier or the application identifier to a network-device controller. The latter acquires user priority or application priority on the basis of the reported identifier and, in accordance with the priority, controls the router on the communication path between the communication terminal and the server.

Abstract: A “Burst Ratio” is defined for use as a measure of the burstiness of a packet-based network. One illustrative implementation of the Burst Ratio (R) is where R is equal to the ratio of the average length of observed bursts in a packet arrival sequence over the average length of bursts expected for a random loss packet-based network. Another illustrative implementation of the Burst Ratio (R) is in the context of a 2-state Markov model, wherein R=1/(1+???), and ? is the probability of losing packet n if packet n?1 was found (i.e., the probability of losing the next packet if the current packet was received) and ? represents the probability of losing packet n if packet n?1 was lost (i.e., the probability of losing the next packet if the current packet was lost).

Abstract: A method of optimizing latency delays in VoIP and other multimedia communications using IPv6 over the “publics” internet and between two end users that involves selecting an optimum VoIP route based upon periodic trace measurements of the best available VoIP routes at the time of VoIP communications and comparison of that information with historic route information between the same two end user destinations. The method of the present invention employs a dynamic data library which is a modification and addition to the Source Routing header within the NEXT header extension of IPv6 and which works in correlation with the Hop-to-Hop Options header of the NEXT header extension within IPv6. This dynamic data library contains a routing database with contains current best available VoIP route information at the time of the VoIP communication and a destination database which contains historical information concerning best available VoIP routes between particular end user destinations.

Abstract: The present invention supports a packet-based communication by emulating the functions of an enhanced mobile radio system. The communication device executes emulation software to support simplex communications, as well as other communication features such as voice mail, electronic mail, or public switched telephone network communications. Communications to and from the devices configured with emulation software can also be controlled with a presence routine.

Abstract: A method for packet transmission of multimedia data in a network is provided. The method is used for transmitting a group of pictures (GOP) including a plurality of frames, wherein each frame includes a plurality of packets, and the plurality of frames are of N types of frame. The method includes the following steps. (a) Set i to one, where i is a positive integer. (b) Form an i-th transmission sequence by arranging the packets of the i-th type of frame. (c) Form an (i+1)-th transmission sequence by putting the packets of the (i+1)-th type of frame between packets of the i-th transmission sequence consecutively. (d) Increment i by one. (e) Repeat steps (c) to (d) until i is equal to N. (f) Transmit the N-th transmission sequence.

Abstract: Despreading section 203 extracts a common control channel signal from each base station by performing despreading processing on a baseband signal from RF section 202 using a predetermined spreading code. Propagation loss measuring section 206 measures a propagation loss for each base station using the reception level of the common control channel signal and the transmission level of this common control channel signal. Propagation loss comparator 207 detects a base station whose propagation loss is a minimum from among all base stations. Transmission data control section 208 controls the timing of transmission data in the data composition section so that an dedicated traffic channel signal is transmitted to the detected base station and controls the spreading code in spreading section 211.

Abstract: A method of compensating within a receiving endpoint for lost audio packets transmitted across an IP network, comprising the steps of storing a packet buffer of samples as a plurality of sub packets within a jitter buffer, inserting at least one interpolated sub packet between successive sub packets in the buffer, and playing out the sub packets from the buffer, such that only small portions of the jitter buffer are replayed at specific times to minimize the negative effects on voice quality. The inventive method inserts the replayed portions to compensate for packet loss in a way that results in only a relatively low processing burden.

Abstract: A modem for Time Division Multiplexed Digital Subscriber Line applications eliminates the requirements for a Hybrid Balanced Network and employs low noise termination of the load resistors using switchable transistors for saturation of the line driver or a switchable parallel balancing impedance activated synchronously with the receive time slot of the TDM protocol.

Abstract: A network device dynamically switches between layer 2 (data link) operation and layer 3 (network) operation. When enabled, bridging logic functions as a data link bridge, receiving data link messages from communications links forming part of a single network-layer segment and forwarding the messages to another communications link using layer-2 addresses in the messages. When enabled, routing logic functions as a network router, receiving network layer messages from different network-layer segments and forwarding the messages to other links based on a routing algorithm and the network layer addresses. Selection logic dynamically selects the desired function under different operating conditions. For a transition from router to bridge, multiple network-layer segments are merged into a single bridged network-layer segment, freeing up link numbers for use in configuring addresses for other segments.

Abstract: A redundant structure control device for an (N+1) reluctant structure exchange, capable dealing with line trouble and line interface device trouble. When line trouble is detected frame tag attaching is arranged so a frame coming from a interface device originally connected with a troubled line toward die troubled line may be sent to a spare line. When a troubled line interface device is detected, frame tag attaching is arranged so that a frame coming from a line originally connected with the troubled line interface device be sent to a spare line interface device and a frame earning from the spare line interface device may flow so the line originally connected with the troubled line interface device, and instructs the change of a cell tag coming from an ATM switch toward the troubled line interface device, to a value indicating that the cell be sent to the spare line interface device.

Abstract: A system is described for providing a single telephone number for geographically dispersed telephony service subscribers. The system includes an automatic call distributor (ACD) coupled to receive incoming calls from a public switched telephone network (PSTN) and a plurality of gateways coupled between the ACD and the Internet. Each one of the gateways is assigned to service a defined group of subscribers. The ACD selectively interconnects an incoming telephone call from the PSTN to an appropriate one of the gateways based on at least a portion of a setup message field identifying a telephone number forwarding the incoming telephone call.

Abstract: The invention discloses an Internet phone transmitting signals through a USB interface, which comprises a thin client and a digital phone. The USB interface connects the thin client and the digital phone. The phone communication is achieved through the online function of the thin client. The voice message sending procedure transmits outgoing message signals to the thin client through the USB interface. The thin client converts the outgoing message signals into an outgoing message VOIP package. The outgoing message VOIP package is then transmitted through a network to a target. The voice message receiving procedure transmits an incoming message VOIP package from the target back to the thin client through the network and converts the incoming message VOIP package into incoming message signals. Further through the USB interface, the incoming message signals are transmitted to the digital phone.

Abstract: Method and apparatus for tunneling operating codes to and from a call server in a packet network. A signaling package for the Megaco/H.248 protocol is provided which encapsulates or “tunnels” control and signaling codes for an endpoint device so that the codes can be communicated between a call server and the device. Only the call server and the endpoint device need have the intelligence to interpret the operating codes. Where the device is a programmable phone, the call server can be provisioned to understand and control specialized functions of the phone without adding new, telephone specific signaling to the standard Megaco/H.248 protocol for each type of phone to be supported. The media gateway that serves the specific telephone in question simply passes on any operating codes received.

Abstract: A SONET multiplexed communications system that facilitates the sharing of processing resources while reducing overall system complexity. The SONET multiplexed communications system includes a single multi-output pointer generator clocked by a system clock and a plurality of clock domain transfer circuits having respective FIFO buffers for transferring SONET signals from the system clock domain to respective outgoing line clock domains. The multi-output pointer generator and the clock domain transfer circuits compensate for timing differences between the system clock and the respective outgoing line clocks by either skipping or overwriting FIFO buffer address locations corresponding to TOH byte positions in outgoing SONET frames. The TOH bytes corresponding to the skipped or overwritten TOH byte positions are subsequently re-generated by respective TOH insertion circuits before the outgoing SONET frames are passed through outgoing SONET lines.

Abstract: Apparatus and methods using a first service provider such as a WAN cellular service provider to initiate a communications exchange between a plurality of communications units and a second service provider such as WLAN service provider to provide enhanced communications services to the units has been disclosed and described.

Abstract: A system and method have been provided for sorting information segments in a packet/cell earliest deadline first queue circuit. The invention permits information segments to be inserted at a rate that is twice as fast as the maximum extraction rate. Pairs of permanent and temporary registers are organized into a hierarchical sequence of stages. Generally, information segments with lower field ranks move systolically through the stages to temporary registers in higher sequence stages. Information segments with higher field ranks move systolically through the stages to permanent registers lower in the sequence of stages. The invention permits the highest rank information segments to be sorted and extracted with great efficiency.