Abstract: A delivery time differential is computed between an intended transmission time of a cell and a time that the same cell is successfully transmitted on a multiple access network. The delivery time differential is communicated from the client terminal, where it is initially calculated, to the host terminal side, which utilizes the delivery time differential to compensate for the time distortions resulting from multiple end-user devices accessing shared bandwidth on the multiple access network.

Abstract: An ATM routing switch for bidirectional transmission of digital signal cells some requiring integrity of transmission while others accept some loss of cells in transmission, has a plurality of output ports each handling a plurality of cell queues and control circuitry for decoding control bits in each input cell to determine which output port is to be used, which queue is required and whether flow congestions exists at the source of the input cell.

Abstract: In a code division multiple access (CDMA) spread spectrum cellular communication system in which a mobile station user communicates with another system user via at least one base station, wherein each base station transmits a common pilot signal of a different PN offset with respect to other base stations in said system, a method for merging neighbor lists to account for false indications of signal strength due to topography. The merged list, included as part of the Neighbor List Update Message, is arrived at by first measuring pilot signal strengths and phase delays received by the mobile station and reporting this information to the mobile telephone switching office. At the mobile telephone switching office, pilots whose phase delay indicates a large round trip delay time are ignored in subsequent calculations. Then a neighbor list union is generated as the union of all predetermined neighbor lists corresponding to said received pilot signals.

Abstract: A method for generating dummy frequencies to make frequency hard handover smooth in provision of a digital CDMA mobile communication service when base stations are different in frequency configuration. The coverage of each of the dummy frequencies becomes the same as that of a service frequency using basic signals of the service frequency. According to the present invention, a pilot channel signal, a sync channel signal, a paging channel signal and traffic channel signals of the service frequency are placed directly on each of the dummy frequencies. Therefore, the coverage of the dummy frequency can always become the same as that of the service frequency which is varied according to a traffic amount of the base station, so that a mobile station can perfectly perform the frequency hard handover. Further, one power combiner, one power amplifier and one power divider are provided to process all of the dummy frequencies.

Abstract: A telecommunications switch is provided with an internal ethernet link which is connected to a group switch/time switch portion of the switch through a number of interface processors. The group switch/time switch portion functions to switch data communications among and between the subscriber lines, trunk lines and the interface processors. The ethernet link serves as a concentrator for packet data communications carried over the subscriber/trunk lines and handled by switch. The interface processors operate to selectively insert and extract packet data communications to and from the ethernet link. A connection is made via the ethernet link to an Internet access point to allow concentrated data packet communication with the Internet.

Abstract: A multi-network environment comprises a plurality of different digital networks, a network manager associated with each network, a system manager at each customer premises for requesting a desired service, a customer agent for implementing instructions received from the customer agent, and a call processing unit associated with each network for implementing instructions received from a customer agent to route a call through the networks.

Abstract: A data variation detecting system can perform detection of data variation at an arbitrary timing without lowering process performance of a processing unit, and without requiring expansion of a memory region in the processing unit. In the data variation detecting system, a recent data and a preceding data are taken from a shift register, are compared by a comparator circuit for detecting whether data variation is present or not by a data variation detecting circuit. The recent data is stored in a memory of an interface circuit with a data holding circuit. A result of detection by the data variation detecting system is directly stored in the memory in the interface circuit. When data variation is detected, operation of storing the recent data by the shift register and the data holding circuit is disabled via a masking circuit. The occurrence of data variation is detected by the processing unit via the interface circuit, the processing unit obtains the recent data from the interface circuit.

Abstract: The invention relates to integrated office communication systems employing a local area network (LAN) for intra-office communications. In the arrangement according to the invention, no other internal networks are needed in the office because computers (10) are connected to the local area network and telephones (5, 7) are either mobile or cordless phones for which there are low-power room-specific base stations (4, 6) in the local area network (LAN). Connections to the outside world are made via a gateway computer (1) and public cellular radio network. Inside the office, the coverage areas of the small base stations (4, 6, 8) are nanocells (4a) of one or a few rooms. A home or small office user has a similar small base station (14) which is cotifected to said local area network via a public communication network (15) and a gateway equipment (13).

Abstract: A system that enables a portable station of the personal handy phone system to support a conference call. The present invention provides this capability by empowering a portable station to communicate with up to four cell stations simultaneously enabling the user of the portable station to communicate with the users of four other telecommunication devices. Specifically, the present invention modifies the internal circuitry of a portable station to increase the number of receiving channel circuits to four and the transmitting channel circuits to four while adding a digital signal processor to mix the different received and outgoing voice signals. The increased number of receiving and transmitting channel circuits enables a portable station to utilize all the communication slots located within the frames of the radio communication interface of the personal handy phone system. Communication is time-multiplexed across these slots.

Abstract: An apparatus and a method for transferring an audio/video/data service from a transmission end to a reception end over a radio interface. The audio/video/data service includes one of audio information, video information and data. The radio interface includes a plurality of subchannels and a plurality of carriers for transmitting the audio/video/data service and at least one information channel. The audio/video/data service is divided into a set of files, wherein the set of files forms a service ensemble. A parameter group is associated with and describes each corresponding one of the files. Each of the files, along with a corresponding parameter group is placed onto one of the subchannels. A placement indicator and a corresponding parameter group is placed on the at least one information channel.

Abstract: In a communication system capable of variable rate transmission, multi-level scheduling improves utilization of the reverse link and decreases the transmission delay in data communication. Multi-level scheduling comprises base station level scheduling, selector level (system level) scheduling, and network level scheduling. Network level scheduling is performed for base station in soft handoff with base stations which are controlled by different selector scheduler. Selector level scheduling is performed for remote stations in soft handoff with base stations which are controlled by the same selector scheduler. And base station level scheduling is performed for remote stations not in soft handoff. Base station level scheduled is performed using residual capacity after higher level scheduling have been performed. Each scheduling level can have different scheduling interval.

Abstract: The disclosed device, placed within an ATM packet switch, is of the type comprising a multiplexer associated with a specified number of input and output buffers and a device to control the internal flows of ATM cells informing the input buffers of the state of congestion of the output buffers. This device further comprises means to convert the flow of sporadic point-to-multipoint cells, arriving at the input of the input buffers, into a regular flow of point-to-multipoint cells towards the multiplexer irrespective of the outgoing direction taken by the cells and independently for each input.

Abstract: A short cell management unit capable of carrying out OAM (operation, administration and maintenance) functions on short cell connection basis (newly defined F7 flow) included in VC (virtual connection) in addition to OAM functions on VC basis (F5 flow) which are defined in a conventional B-ISDN. The F7 flow includes the entire OAM functions such as fault management, performance management, which are included in F4 and F5 flows that carry out the management by causing a standard OAM cell defined in the existing B-ISDN to flow. To implement this, a variable length OAM cell is newly provided as one of the short cells, and a base station and a switching office are newly provided with a short OAM cell/standard OAM cell translator for carrying out mapping between the short OAM cell and the standard OAM cell. Furthermore, a generally used standard OAM processor is used for implementing the management functions (F4 and F5 flow) defined in the standard B-ISDN.

Abstract: Disclosed are methods for acquiring a forward channel in a point-to-multipoint CDMA system. One method includes the steps of (a) despreading a received CDMA signal with a first pn code that is known to be present in the received CDMA signal and obtaining a first measure of received signal level; (b) despreading the received CDMA signal with a second pn code that is known not to be present in the received CDMA signal and obtaining a second measure of received signal level; and (c) synchronizing to a desired channel using a difference between the first and second signal levels. In this method the first step of despreading despreads a continuously transmitted side-channel, and the step of synchronizing synchronizes to the side-channel. Also, the step of obtaining a first measure of received signal level obtains a correlation peak, and the step of obtaining a second measure of received signal level obtains a correlation null.

Abstract: In an ATM switch, queue thresholds vary dynamically depending on switch congestion. All the queues are organized in one or more classes. The thresholds for each class depend inversely on the number of cells in all the queues of the class.

Abstract: A transfer rate controller (10) allows the originator of the data to determine when the data is transferred on the communications link. A method of regulating the transfer of ATM cells to maintain rate precision and provide flexibility for dynamically adjusting the rates at which cells are transferred has been described. In accordance with information on the chronology of prior transfers, cell loss priority, set of rate parameters, traffic types, and priorities, a scheduler (12) determines and schedules the relative ordering or placement of virtual connections with respect to one another. The finder (14) selects virtual connections for data transfer. Therefore, the transfer rate controller (10) provides individual transfer rates to virtual connections in accordance with the type of data traffic transferred.

Abstract: Novel techniques are disclosed for continuously monitoring parameters of delay between two nodes in a telecommunication network such as an ATM or frame relay network. The techniques use measurement cells, i.e. test cells, test frames, performance management ATM OAM cells, or performance management frame relay frames. These cells or frames contain a timestamp indicating the time a cell or frame is sent and a delay value indicating a difference between reception and transmission times of the cell or frame.

Abstract: The need for manual verification of service on a desired cross-connect in a cross-connect system prior to provisioning may be eliminated by modifying the logic of the cross-connect system to take account of an internal indication characteristic of whether service is present on the cross-connect. Upon receipt of a NORMAL command, the cross-connect system only executes the command to disconnect the cross-connect when no service is present. However, upon receipt of a FORCED command, the cross-connect system executes the command to disconnect the cross-connect irrespective of the existence of any service thereon. Moreover, in response to an indication of service and denial of the NORMAL command, a FORCE command may be issued instead to effect disconnection of the cross-connection with such disconnection is desired irrespective of the existence of service thereon.

Abstract: A method and an apparatus for adapting a transmission bit rate of each individual one of a plurality of connections to an available bit rate capacity in a data multiplexer operating according to an asynchronous transfer mode includes storage in memory of a total available bit rate for all of the connections. An actual bit rate of all of the connections together is continuously ascertained. A difference between the available bit rate and the actual bit rate is continuously calculated. A number of those connections without underloading is continuously ascertained. A continuous recursive calculation of a current fair share value from the former fair share value, of a number of connections without underloading, and of a difference between the available and the actual bit rate, is performed. The fair share value is written in resource management cells, if the current fair share value is less than the value already contained in the resource management cells.

Abstract: A matrix time switch apparatus for use in a small capacity switching system comprises a matrix having N.times.N voice memories, N being a positive integer greater than 1, wherein each voice memory in each row of the matrix is attached to a corresponding time switch unit in a first group to simultaneously store subscriber data from the corresponding time switch unit in the first group and each voice memory in each column of the matrix is attached to a corresponding time switch unit in a second group to transmit the subscriber data retrieved from each voice memory in each column to the corresponding time switch unit in the second group, and a set of N control memories, wherein each control memory controls the transmission of the subscriber data retrieved in a voice memory selected in the column.