Abstract: Data may be transferred on a packet radio network by creating a connection between two network entities. The data flow may contain active and passive periods. A connection may be maintained during a passive period for a predetermined amount of time or until further data becomes available for transfer.

Abstract: A method to communicate data from a first unit to a second unit over a bus includes initiating an n-block data transfer, where n>1; for a first n?1 data blocks transferred from the first unit to the second unit, controlling a status signal generated by the second unit to be a buffer busy/ready status signal after each of the n?1 data blocks to inform the first unit of when the first unit may transfer the next data block; and for the nth data block transferred from the first unit to the second unit, controlling the status signal to be a programming busy/ready status signal after the nth data block to inform the first unit of a termination of internal programming, if any, by the second unit.

Abstract: A link restoration mechanism includes sending status-inquiry messages at a varying rate between two devices. Under normal operating conditions, keep-alive messages are sent from one device to another to determine the status of the communication link. The keep-alive messages are sent periodically to achieve an on-going status of the communication link between the two devices. If a pre-determined percentage of keep-alive messages fail to be received or are invalid, the communication link is declared down, that is, not functioning correctly, and data exchanges between the two devices cease. Whenever the communication link is suspected to be down due to a disruption in the sending of keep-alive messages, keep-alive messages are sent at an accelerated rate. Thus, after a pre-determined number of valid responses are received the communication link can be declared functioning normally and data exchanges between the two devices can continue.

Abstract: A method is provided for a master device (601) to allocate channel time. The master device sends a polling frame (240) to a current destination slave device (602) and a current polled slave device (603). The polling frame includes a current destination slave device address (350), a current polled slave device address (360), and a current payload (330). The master device receives a poll acknowledgement frame (280) if the current polled slave device does not wish to transmit data. However, if no poll acknowledgement frame is received, the master device waits for a set duration then sets the current destination device address to be equal to a new destination device address, sets the current polled device address to be equal to a new polled slave device address, and sets a current payload to be equal to a new payload. This can be repeated until a channel time allocation ends.

Abstract: A wireless communication method in a network environment in which several devices are connected and wireless communications are performed through a channel synchronized by a sync signal that is broadcast from a piconet coordinate (PNC) selected among the several devices. The wireless communication method includes classifying a first frame to be transmitted to a first device among the several devices into a predetermined number of classes, calculating a waiting time before backoff depending on the classes, and determining whether the channel is used by any other device during the calculated waiting time, calculating a backoff time according to the classes and performing the backoff during the calculated backoff time, if the channel is idle during the waiting time, and transmitting the first frame when the backoff time ends. By adapting the priority to the CAP of the superframe, the control information is quickly conveyed and a high rate wireless communication is realized.

Abstract: The present invention discloses a communication terminal apparatus, by which it is possible to perform communication while comprehensively controlling a plurality of different communication means. For instance, in a communication terminal apparatus 100 hierarchically classified to a plurality of layers depending on different processing functions such as OSI reference model, it is designed in such manner that a processing unit 303 belonging to a predetermined layer can selectively utilize a plurality of processing units 301 belonging to lower layer through control of an operation control unit 304 belonging to a predetermined layer.

Abstract: The invention provides a distributed application server comprising a cluster of two or more nodes in a peer configuration. The two or more nodes are associated with at least one message stream comprising a plurality of messages propagated through the associated nodes. The invention also provides a method of implementing a distributed application server comprising the steps of arranging a cluster of two or more nodes in a peer configuration and associating the nodes with at least one message stream.

Abstract: A communication system includes a controller for managing a number of communications devices. The controller receives registration requests from the devices and selectively registers the devices based on various factors. The controller may support a token registration process by which a device requests a token and, in response to the controller granting a token, registers with the controller using a token registration request.

Abstract: Establishing communication between a first device and a second device participating in a reservation based communication protocol over a communication network and sharing the reservation to allow for data to be transmitted from both devices during the reservation.

Abstract: Apparatus and methods are provided for transitioning wireless devices between a plurality of states having increasing resource intensity from a least resource intensive state to a most resource intensive second state. All power-on wireless devices are ranked. A respective subset of the power-on wireless devices is assigned to each state, the power-on wireless devices of the subsets having rankings which increase with resource intensity of the state. Signalling is generated to the wireless devices to instruct them to implement any change in state. The priorities which are calculated for the purpose of state scheduling are preferably the same as those, or at least based upon the priorities used for packet scheduling.

Abstract: A method for determining a measurement time period for measuring a propagation environment in a wireless station set having a plurality of wireless stations, between which wireless communication is made using a channel selected from a plurality of channels different in frequency. The method includes the steps of: obtaining a measurement time period in another wireless station set having a plurality of wireless stations; and determining the measurement time period in the own wireless station set so as to have a time period that does not overlap the obtained measurement time period.

Abstract: A method of signaling in a wireless communication system (300) comprising a first network element (310) serving a wireless communication unit (325) with at least one packet data network (PDN) connection. The method comprises transmitting, by the first network element (310) to the wireless communication unit (325), a signaling message relating to a wireless communication unit (325) uplink (UL) PDN transmission, where the signaling message comprises a parameter indicative of at least one aggregate maximum bit rate (AMBR) value.

Abstract: A method and apparatus for data stream control for network devices. Some embodiments of an apparatus include a receiver to receive a token for a command associated with a stream of data, where the command is one of multiple command types. The token has a fixed size and format, and the token is provided in a field of a data packet. The apparatus further includes a network unit to determine the type of command based on the token, to parse a set of fields in the data packet for command data, and implement the command.

Abstract: A wireless station communicates with at least one other wireless station in a local area network (LAN). A media access control (MAC) device controls transitions between an active mode and a low power mode. A radio frequency (RF) transceiver communicates with the MAC device and, after the transition to the active mode, transmits data during a predetermined time slot that is assigned to the wireless LAN station and that is not assigned to other wireless LAN stations in the LAN. The RF transceiver receives data from other wireless LAN stations in the LAN during the active mode and transitions to the low power mode after receiving the data from the other wireless LAN stations. The MAC device transitions the wireless LAN station to the active mode prior to a timing beacon and transitions the wireless LAN station to the low power mode prior to a subsequent beacon.

Abstract: In a system for sharing hybrid resources in an independent network, each one of a plurality of stations preferably employs a sharing authority transferring protocol that allows the network control function to be moved from station to station depending on the network traffic. Although a distributed coordination method is normally used in the network, when an individual station determines that a real-time data stream is intended for the station, an apparatus having a method and data format for the use thereof allows control to be transferred to the targeted station. This allows the targeted station to control the sharing of the wireless hybrid resources using a centralized control method in a direct mode for the duration of the real-time service transmission, thereby optimizing network efficiency. As a result of using the distributed control authority of the present invention, a station may be freely subscribe/withdraw to/from the network.

Abstract: An arbiter circuit is provided for resolving a plurality of N request signals received from a plurality of agents requesting access to a resource.

Abstract: A plurality of information processing terminals 100 to 130 are connected to a network. Each processing terminal parameter-manages the total of the idle time units obtained through the detection of the idle time on the network. The processing terminal acquires a transmission privilege when the parameter and its own node ID agree with each other, and sends out the transmission frame inclusive of its own node ID to the network. The reception means 105 receives, from the network, the transmission frame transmitted from the other information processing terminals. The control means 103 extracts the node ID included in the transmission frame thus received and updates the parameter to the node thus extracted, and adjusts the synchronization of the parameters commonly possessed on the same network. In accordance with such a configuration, the transmission privilege can be rounded without exchanging a token frame between specified nodes.

Abstract: A method and system for processing session initiation protocol messages including receiving a session initiation protocol message by a front end, parsing the session initiation protocol message by the front end, grouping the token types and the token contents in the session initiation protocol message respectively, and setting up corresponding links between the token types and the token contents, wherein the session initiation protocol message, after parsing, is transformed to the session initiation protocol offload engine message with a session initiation protocol offload engine message header part, for storing message level information, a token type part, for storing token type information, wherein it comprises a plurality of fixed-length entries, and a token content part for storing token contents, wherein it comprises a plurality of variable-length entries, and processing the transformed session initiation protocol offload engine message at the server end.

Abstract: A network (100) connects a hub device (110) to several peripheral devices (120). The hub device (110) generates a token and broadcasts the token on the network (100). Each of the peripheral devices (120) receives the token broadcast by the hub device (110), determines whether the token identifies the peripheral device (120), analyzes the token to determine a size and direction of a current data transfer when the token identifies the peripheral device (120), and transfers data to or receives data from the hub device (110) according to the determined size and direction of the current data transfer.

Abstract: A switch, switched architecture and process for transferring data through an FCAL switch is disclosed. The switch uses multiple switch control circuits each coupled to one FCAL network and all connected to a crossbar switch. The switch control circuits are coupled together by a protocol bus for coordination purposes. Local conversations can occur on each FCAL loop and crossing conversations through the switch can occur concurrently. The OPN primitive is used to establish the connection before any data is transferred thereby eliminating the need for buffer memory in the switch control circuits. The destination address of each OPN is used to address a lookup table in each switch control circuit to determine if the destination node is local. If not, the destination is looked up and a connection request made on the protocol bus. If the remote port is not busy, it sends a reply which. causes both ports to establish a data path through the backplane crossbar switch.

Abstract: A method for distributed admission control in communication channels of a network including a plurality of nodes measures, at each node, a traffic condition of a communication channel during successive time intervals having a predetermined length. At the particular node, the measured traffic condition for a last time interval is compared to a threshold. The state of the node is changed depending on the comparing.

Abstract: A method and a system provide access to a communications medium that is suitable for allowing use of a plurality of Home Phoneline Network Association (HPNA) v2 frames in a centralized manner. Each HPNA v2 frame is timed to allow an Inter-Frame Gap (IFG) portion having a duration that is substantially a duration defined by an HPNA v2 protocol specification for an IFG portion of an HPNA v2 frame. A plurality of frames are generated in the communications medium with at least one frame of the plurality of frames having timing to allow a Shortened Inter-Frame Gap (SIFG) portion and a contention-free portion. The SIFG portion is less than about 17 ?sec in duration. Access to the communications medium is then provided for at least one station (STA) during the contention-free portion of a frame having timing to allow the SIFG portion.

Abstract: A communication signal for transmitting a sequence of tokens over an interconnection having three wires in which each of the three wire transmits a signal corresponding to one bit of a 3-bit symbol. The tokens are determined by the transitions between the symbols. In one embodiment, RF emission is minimized and self-clocking is achieved by changing exactly one bit of a symbol at each transition. A receiver detects a transition in the signal on one of the three wires, identifies the transition from the previous and current 3-bit symbols and determines the information token associated with the transition.

Abstract: A power integrated local area network, such as an Ethernet network, is disclosed. The network comprises: a plurality of member network devices; and a central network device configured to communicate with the plurality of member network devices, and to deliver power, from energy stored in an electrochemical power source, to at least one selected member network device that is capable of accepting power from the central network device.

Abstract: A radio communication system has a base station(s), a plurality of mobile stations, and a line controller connected to the base station. The line controller has a first memory for keeping track of each communication channel for each base station as to whether the communication channel is occupied or idle. The base station has a second memory for storing an idle communication channel stored in the first memory as a reserved channel. The base station is responsive to a connection request issued from an arbitrary calling mobile station and including designation of a called mobile station to designate a reserved channel stored in the second memory of an associated base station as a communication channel for the calling and called mobile stations to establish a connection with the mobile stations.

Abstract: An idle frame counter is not reset after retransmission of a data frame. Additionally, if a non-acknowledgment (NAK) is received for the last data frame sent, then no more idle frames are transmitted. Finally, an Idle Acknowledgment (ACK) is transmitted when an idle frame has been received with a sequence number equal to the sequence number of the next new data frame expected.

Abstract: The method serves for calling a substation (USm) by a central station (Z) in a transmission system for the purposes of information transmission by way of a communication channel (m) called from a plurality of communication channels. The plurality of communication channels is subdivided into communication groups (GRI, GRII, GRIII) of the same property or the same parameter values. Within a selected communication group (GRII) a communication channel (m) is called, which is still communication-free. If all (n) communication channels of the communication group (GRII) are already busy, the central station (Z) goes into a waiting condition until at least one of the communication channels of the communication group (GRII) becomes communication-free.

Abstract: Methods, apparatus, and computer-readable media are disclosed for performing diagnostic tests of a communication link between a headend and a cable modem without having to assign an IP address to the cable modem. The diagnostic tests are performed at the MAC layer and test the state of the hardware between and including the cable modem termination system (CMTS) and a selected cable modem. By doing so, a network operator is able to more easily focus in on a potential problem in cable RF/MAC connectivity between the two components by first eliminating (or identifying) a problem with hardware before focusing on problem-solving at the software level, typically at the Network layer, at which point the cable modem is assigned an IP address.

Abstract: The error-free function of modules in a bus system with a central unit is tested. First, all (error-free) modules are set into a silent operating mode in response to an agreed silence-command, and then in this silent operating mode it is tested whether all modules still remain silent, i.e. do not transmit data, in response to an agreed data request allocated to these modules. A module that nonetheless transmits data is recognized as faulty and is deactivated. Subsequently, all modules except for a module to be tested are set into the silent operating mode, and then it is tested whether this test module transmits its data in response to the agreed data requests allocated to it and remains silent in response to the data requests not allocated to it. Additionally, the position of the return-transmitted data can be determined and compared with a nominal position.

Abstract: In a network node attached to a serial bus, a first count value is incremented beginning with the start timing of a child notify signal transmitted from the node to the bus until the end timing of a parent notify signal received by the node from said bus. The first count value represents the turnaround time of signals between the node and a node attached to the remote end of the serial bus. Normally, signals from the serial bus are supplied to a higher layer. Instead of the received bus signal, an idle signal is supplied to the higher layer for an interval beginning with the end timing of a packet transmitted from the higher layer to the bus until the interval corresponds to the turnaround time.

Abstract: The present invention provides for a method and computer program product for handling timeout in a standard RPC connection. First, a client establishes a connection with a server with unique identification. After submitting an RPC request, the client system will periodically make secondary requests to the server to determine if the server is still actively processing the primary RPC request. If the secondary request is processed successfully and the server indicates that the primary request is still in progress, the client will continue to wait until either the primary request completes or enough time elapses to warrant another secondary request. The success of the secondary request hinges on finding a match of identification for the primary and secondary requests. If the secondary request fails, this failure is treated as a sign that there is either a network or a server problem, and the client is triggered into taking appropriate corrective action.

Abstract: In the present invention a voice and data network is disclosed that has applicability to a home or building where existing phone lines are used to interconnect multiple phones and computers within the network. Voice and data modules connect telephones and computers to the existing telephone wiring in a home or building. A link to wide area network allows phone calls to be placed between the network and the Public Service telephone network. All devices connected to the telephone wiring have their own ID and communicate by Tokens in Ethernet technology. This allows Ethernet packets to perform a plurality of communications between a plurality of devices connected to the network under the control of tokens. The communications is accomplished by passing packets containing voice and data signals between phones and computers internal to the network and to an external port to connect to outside of the network.

Abstract: The present invention allows transmission power control for each packet without increasing overhead and control processing delay in communications control systems such as CDMA systems, thereby increasing the quality of transmission. The present invention provides a communications control system for controlling packet communications between a base station and a mobile station, including a determiner for determining the transmission power level of packet data based on the received intensity of a preamble signal transmitted in advance of transmission of the packet data or a reservation signal, a reservation signal transmitter for transmitting to the base station information regarding the amount and type of subsequent packet data as the reservation signal in parallel with transmission processing of the packet data, and a packet data transmitter for obtaining information regarding the determined transmission power level at the mobile station and transmitting the packet data based on the obtained information.

Abstract: A communications system may include a plurality of source message servers for storing messages for delivery to a user, a target message server having a target message box associated therewith, and an aggregation server for periodically aggregating the messages from the source message servers to the target message box for retrieval by the user. The target message server may provide a delivery failure message to the aggregation server based upon a failure to deliver a message to the target message box. As such, the aggregation server may increase a period of sending messages to the target message box based upon a delivery failure message therefrom, and thereafter decrease the period of sending messages to the target message box based upon a successful delivery of a message thereto.

Abstract: A memory has a set of address spaces to which token data is written and read. Each address space has a token status bit. A token generator allocates token data to the memory address spaces. Upon a reset occurring, a logic circuit provides logic “0” to the token generator disabling status bit checking control so that all the tokens can be issued sequentially. New token data is allocated to the address spaces sequentially and the respective status bit is updated or maintained as logic “1”. When all address spaces have been allocated, the logic circuit provides the actual state of the status bit to the token generator to control subsequent allocations.

Abstract: A communication system includes a controller for managing a number of communications devices. The controller receives registration requests from the devices and selectively registers the devices based on various factors. The controller may support a token registration process by which a device requests a token and, in response to the controller granting a token, registers with the controller using a token registration request.

Abstract: In an IP-based Code Division Multiple Access (CDMA) 2000 packet-data cellular telecommunications network, a method and system for handing over a dormant Mobile Node (MN) to a target packet zone. According to the invention, first the dormant MN sends an origination request message to the target Base Station Controller and Packet Control Function (BSC/PCF), which further sends a registration request comprising an indication that the MN is dormant to a Packet Data Service Node (PDSN). The PDSN replies to the BSC/PCF with a registration reply message for requesting the establishment of a traffic channel for the MN, and for indicating that it has data packets ready to be sent to the MN, such as for example Link Control Protocol (LCP) data packets for use in the negotiation of a new Point-to-Point Protocol (PPP) connection. The registration reply message comprises an indication such as for example a Data ready to Sent (DRS) parameter set to 1.

Abstract: In a communication system (1400) for communication of data, a method and apparatus provide for detecting a request for opening a connection for a user (1407) for communication of data, selecting an open connection, releasing the selected open connection, and allocating, to the user (1407), communication resources corresponding to resources released based on releasing the selected open connection. In accordance with an embodiment, the selected open connection is in an idle open state.

Abstract: A positioning apparatus for determining a present position of a mobile station by using radio waves coming from a plurality of base stations arranged within a communication area is provided. The positioning apparatus receives the radio waves coming from the plurality of base stations to generate reception signals corresponding to the respective radio waves, and determines propagation ranges of the radio waves coming from the respective base stations. The apparatus further derives propagation ranges of direct waves coming from the respective base stations from the determined propagation ranges. Then, the present position of the mobile station is determined by performing positioning operation using the derived propagation ranges of the direct waves.

Abstract: A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602) pilot symbols are each represented by first (701) and second (702) pilot carriers, respectively, located at first (703) and second (704) predetermined sample frequencies, respectively, in a channel bandwidth. For the first pilot symbol (601), the first (701) and second (702) pilot carriers have first and second predetermined values, respectively. For the second pilot symbol (602), the first (701) and second (702) pilot carriers have third and fourth predetermined values, respectively.

Abstract: A method and apparatus are provided for efficiently managing hot spots in a resource managed computer system. The system utilizes a controller, a series of requestor groups, and a series of loan registers. The controller is configured to allocate and is configured to reallocate resources among the requestor groups to efficiently manage the computer system. The loan registers account for reallocated resources such that intended preallocation of use of shared resources is closely maintained. Hence, the computer system is able to operate efficiently while preventing any single requestor or group of requestors from monopolizing shared resources.

Abstract: A system that uses a ping pong protocol in order to remain as flexible as possible during traffic allocation includes multiple units, each of which has a unique address. A first unit transmits a first data packet including a first length indicator toward a second unit or a third unit. Each of the second unit and the third unit is operable to receive the packet and then, upon receipt of the packet, can transmit another packet. One of the units can be assigned a master unit role and is operable to restart transmission operations using priority slots. A priority slot allows a unit to transmit a packet regardless of whether it has received a packet according to the ping-pong scheme. A selective-repeat automatic retransmission query scheme provides data integrity in an error-prone communications environment. The first unit and the second unit are operable to transmit packets that include a number of segments.

Abstract: A communication buffer 102 of a node has a plurality of storage areas for storing transmission data of other nodes. The plurality of nodes receive data transmitted by the token passing communication method and store the received data to the storage area corresponding to the transmission originator by a micro-sequencer 101. The node specified as a transmission destination informs a receiving acknowledgment.

Abstract: A method and apparatus for token distribution include providing one or more nodes of a plurality of network nodes with a token machine that includes counters associated with each of other network nodes having a token machine. Each time a token possessing network node implicitly or explicitly passes the token to another network node having a token machine, counter values of each of the counters associated with each node having a token machine are adjusted. When a token is passed, the counter value of the receiving node is adjusted based, at least in part, on an initial token interval value, and counter values associated with other nodes are adjusted toward a threshold value. The decision as to where the token is passed may be based, at least in part, on the value of a counter and/or an assigned counter priority level.

Abstract: In Switches, switch inputs and outputs may be grouped into (e.g., small) modules called input shared blocks (or “ISBs”) and output shared blocks (or “OSBs”), respectively. Each of the switches includes three (3) main parts: (i) input shared blocks (ISBs); (ii) a central switch fabric (or “ATMCSF”); and (iii) output shared blocks (OSBs). Input link sharing at every ISB-ATMCSF interface and output link sharing at every ATMCSF-OSB interface cooperate intelligently to resolve output contention and essentially eliminate any speedup requirement in central switch fabric. Each of the proposed switches can easily scale to a large size by cascading additional input and output shared blocks (ISBs and OSBs). Instead of using a centralized scheduler to resolve input and output contention, the each of the switches applies a distributed link reservation scheme upon which cell scheduling is based.

Abstract: A method and system for transferring one or more sequentially ordered data files to a plurality of secondary systems that respond after receipt of each file. A clear-to-send (CTS) flag is maintained for each of the secondary systems. A sequence broker reads a clear-to-send flag and, if the CTS flag is asserted, issues a transfer command to a transmit module to transmit a next data file to the secondary system. The sequence broker reads a status file associated with a secondary system and determines which data file, if any, is to be transferred. The sequence broker receives invoking commands from a clear-to-send broker and/or an invoking module for invoking the transfer process.

Abstract: A technique for selecting the offset between data bursts and their respective control packets in an optical burst switching arrangement includes: randomly generating a plurality of tokens; receiving a plurality of sequentially generated data bursts; and receiving a plurality of control packets, each control packet corresponding to a respective one of the plurality of data bursts. One of the plurality of control packets is first outputted and its corresponding respective data burst is then outputted at a time corresponding to the generation of the first of the plurality of tokens which occurs at a time in which no data burst is being outputted, the outputting of the data burst being offset from the output of its corresponding respective control packet by a time period. The average rate at which the plurality of data bursts are outputted may be equal to the reciprocal of the mean of the probability distribution used to generate the plurality of tokens.

Abstract: A method for transmission of high-speed digital signals includes transmitting a data signal over a communication line responsive to input data, the data signal having a data frequency spectrum. During an idle interval in the input data, two idle signals are transmitted in alternation: a first idle signal, having a first frequency spectrum that is substantially stationary relative to the data frequency spectrum, and a second idle signal, having a second frequency spectrum that is substantially non-stationary relative to the data frequency spectrum.

Abstract: In a broadcasting control system in an ATM ring network in which a control cell containing control information is transmitted by ATM (Asynchronous Transfer Mode) between a plurality of nodes connected into a ring shape, each of the nodes includes a receiving section and a transmitting section. The receiving section receives a control cell from an upstream node. The transmitting section writes response information of the self node for the control information contained in the received control cell in an area corresponding to the self node in the control cell and transmits the control cell to a downstream node. A broadcasting control method is also disclosed.

Abstract: A host channel adapter configured for outputting packets according to InfiniBand™ protocol includes a queue pair attributes table having queue pair entries configured for specifying attributes of the respective queue pairs. Each queue pair entry includes a timestamp field for storing a time value. Upon teardown of a queue pair, a management agent stores a timestamp value, according to a prescribed time resolution interval, within the timestamp field and sets a corresponding wait state bit. The queue pair attributes table is accessed each prescribed time resolution interval for identification of idle queue pairs having passed a minimum idle interval at least equal to the prescribed time resolution interval. If an identified idle queue pair has a corresponding timestamp value indicating passing of the minimum time idle interval, the corresponding wait state bit is reset enabling the queue pair to be reused.