Abstract: A time slot selection device is provided that can consider resource use states on its own and allocate time slots. The time slot selection device performs time slot allocation, based on data link identifiers that identify a group of data links specified by a path setup request, a time slot size that is information about a required band, and a required number that is the number of contiguous time slots required. In this time slot selection device, a resource allocation section performs time slot selection, based on the resource use state of each time slot. By the time slot selection with consideration given to the use state of each time slot in the group of data links, time slots to be used can be selected so that a maximum number of contiguous usable time slots will be left. Thus, it is possible to efficiently use resources.

Abstract: The present invention is directed to methods and systems for allocating bandwidth (or other shared resource) among multiple masters. According to an aspect of the present invention, an arbiter assigns a bucket to each CPU (or other device) where each bucket holds the credits for that CPU. Each bucket has a predetermined fill rate and a drain rate. Depending on the priority given to a particular CPU, the corresponding bucket will drain (or fill) at a particular rate. For example, CPUs with a higher priority will drain at a slower rate. For each clock tick (or other period of time) that a CPU is stalled, a number of credits is accrued. The bucket with the highest number of credits has priority and will be given access to the shared resource (e.g., DRAM, SDRAM, SRAM, EPROM, etc.).

Abstract: A mobile communications device (30) includes a wireless transceiver (34) operable to conduct at least two data connections between the mobile communications device (30) and a wireless network (12) wherein each of the data connections is associated with a connected application operating on the mobile communications device. A processor (32) is coupled to the wireless transceiver (34). The processor (32) is operable to process a request for a data connection for an unconnected application operable on the mobile communications device (30), to release one of the data connections associated with one of the connected applications and to establish a data connection between the mobile communications device (30) and the wireless network (12) for the unconnected application. A contention manager (86) is operable to select the connected application to be released based upon a comparison of a contention parameter associated with each of the connected applications.

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 of configuring communication with a plurality of non-overlapping channels and between communication units with first communication units and second communication units is disclosed. The first communication units are privileged with respect to the second communication units, the second communication units having dynamically adaptable transceivers enabling channel switching, at least one of the second communication units being within the communication range of one of the first communication units. In one aspect, the method comprises determining information on the availability of the channels of the communication system for communication by the second communication units, based at least in part on information regarding whether the first communication units are active or not on the channels.

Abstract: A multi-tone synchronous collision resolution system permits communication nodes within a MANET to contend simultaneously for a plurality of available channels. The communication nodes contend for access using a synchronous signaling mechanism that utilizes multiple tones in a synchronous manner to resolve contentions. Contentions are arbitrated locally, and a surviving subset of communication nodes is selected. The communication nodes of the surviving subset then transmit data packets simultaneously across the available communication channels.

Abstract: System and method for dynamic resource allocation in wireless communications networks. A method for dynamically allocating resources of a contention channel comprises computing an expected delay for a transmission made by a user over the contention channel, determining a target probability of collision from the expected delay, computing an allocation of resources of the contention channel using the target probability of collision, and allocating resources of the contention channel using the computed allocation of resources.

Abstract: A fibre channel switch element with an acceleration device that connects plural fibre channel devices in an arbitrated loop and monitors frames sent during a loop initialization process is provided. The acceleration device creates an AL_PA table selected by each fibre channel device, wherein the AL_PA table is used for port selection; and during an arbitration process sends a benign primitive to non-arbitrating devices. The acceleration device includes, a global arbitration module, a state machine module, and a matrix for connecting plural fibre channel devices.

Abstract: Mechanisms, in a transmission channel shared by 802.11 systems and HIPERLAN/2 systems are provided to prevent 802.11 terminals from transmitting during time periods allocated to HIPERLAN, so that a single channel can be shared between the two standards. In a particular embodiment, a “super frame” format is used where HIPERLAN transmissions are offered the highest level of protection possible within 802.11, which is needed within the 802.11 Contention Free Period (CFP).

Abstract: When operating as a control terminal and recognizing interference from another logical network, a terminal apparatus determines whether or not a logical network to be controlled is unified with the other logical network. When unification is determined, the terminal apparatus determines whether a control terminal of a logical network newly created by unification is the terminal apparatus or a control terminal of the other logical network.

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: Apparatus (48), and an associated method, for facilitating operation of a mobile node (12) operable in a communication system (10) to request allocation of communication capacity upon which to communicate data pursuant to a communication service. A channel allocation request generator (52) is selectably operable to generate requests for allocation of channel capacity upon which to communicate the data. A selector (54) selects when to cause the generator (52) to communicate the additional data packets. Selection is made to delay, or otherwise prevent, retransmission of requests, when a determination is made that the retransmission is unlikely to be successful.

Abstract: A mobile radio network comprises a plurality of communication points, each of which are capable of communicating with any other communication point. Each communication point has a proximity sensor, a transmitter/receiver (14), which is able to send signals to and receive signals from the other communication points. Elements for controlling the transmitter/receiver and elements for storing data to identify the communication points is also described.

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 of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element A method (300) of operating a network node (101-104) of a network system (100), comprising the steps of generating (305) a signal to be transmitted, selecting (310) one of a plurality of communication channels (105-108) of the network system (100) for transmitting the signal, and, in case that the selected channel (105-108) is not ready for transmitting the signal, selecting (345) another one of the plurality of communication channels (105-108) for transmitting the signal.

Abstract: Method and apparatus for transmission of information in multiple access communication system is described. Information from a plurality of access terminals is received. Alternatively, an access terminal determines what information needs to be sent to the access point. A determination is made as to whether sufficient resources, such as time, power level, or channels, are available to send an indication of acknowledgment. If sufficient resources are not available at the given time, the transmission of an indication of acknowledgment is delayed until sufficient resources are available.

Abstract: An Infiniband device is provided. The device has a plurality of input/output ports. Each port has associated therewith an input buffer for storage of a packet received at that port. Each port also has associated therewith a plurality of output buffers for storage of a packet transmitted from an input buffer via a switching matrix. Each port is arranged to share its associated plurality of output ports with at least one other port. Each input buffer is also associated with a single output buffer of each shared plurality of output buffers. A packet received at an input buffer is transmitted to all associated output buffers via the switching matrix in parallel with an output buffer select signal. The output buffer select signal is sent to less than all of the associated output buffers, any output buffer not receiving the output buffer select signal is configured to discard the packet transmitted from the input buffer.

Abstract: A mobile node registers with a wireless telecommunications network to obtain a mobile node registration having a registration time period. Before the registration time period expires, the mobile node's registration is renewed, if a renewal criterion is met. The renewal criterion distinguishes between user data traffic and automatic data traffic.

Abstract: Apparatus is disclosed for connecting at least a first Fibre Channel device to at least a second Fibre Channel device. The apparatus includes ports, buffers and bypass buffers that are arranged so that the second Fibre Channel device can operate at a physical link rate that is higher than the physical link rate of the first Fibre Channel device regardless of whether or not the first Fibre Channel device is sending data words to the second Fibre Channel device and regardless of whether or not the second Fibre Channel device is sending data words to the first Fibre Channel device.

Abstract: A technique for allocating stack bus bandwidth based on the offered load of each stack member coupled to the stacking bus allocates access opportunities to the stack bus based on the ratio of the offered loads of the coupled stack members.

Abstract: Prioritized communications are facilitated based on a receiving user's designation of a source (initiator), a delivery mode, and other parameters associated with the communication. The receiver may configure a list of preapproved initiators, delivery devices and modes, and any associated services such as a locator service, a mapping service, a directory service, etc. The communication is initiated by the initiator or automatically from an application associated with the initiator's device. A communication service or a hosted service retrieves receiver information and facilitates prioritized communication also providing optional services associated with the communication.

Abstract: Method of prioritising the usage of slotted links by single network devices in a wireless network for adapting to varying traffic loads, comprising the steps of pre-setting a distribution of priorities for using a link to predetermined values, monitoring the current link usage, and adapting the priorities in accordance with the monitored usage.

Abstract: A method for controlling bi-directional data transfers in an electronic circuit is provided. The method involves when a first of at least two data signals is activated as an originating data signal prior to a second of the at least two data signals: allowing only a device associated with the first of the at least two data signals to be a signal source, and causing a device associated with the second of the at least two data signals to enter a receive state as a signal sink. The method further involves passing at least one bit of data from the signal source to the signal sink.

Abstract: A method and apparatus for supporting heterogeneous agents in on-chip busses. In one embodiment, the method includes the detection of a bus arbitration event between at least a first bus agent and a second bus agent. In one embodiment, a bus arbitration event is detected when at least the first bus agent and the second bus agent assert their respective bus request signals in a single clock cycle. Once a bus arbitration event is detected, bus ownership may be granted to both the first bus agent and the second bus agent, when the first bus agent and the second bus agent have different grant-to-valid latencies. In the embodiment, heterogeneous bus agents may coexist on a bus without requiring wasted or unused bus cycles following establishment of bus ownership. Other embodiments are described and claimed.

Abstract: An apparatus and method for adaptively allocating subchannels according to frequency reuse rates in an OFDMA system are provided. To allocate one or more subchannels to one or more MSs, information related to an optimum FRF and a modulation scheme is received from the plurality of MSs, the number of subchannels required for each FRF is calculated according to the received information, subchannels are allocated to the BS for each FRF, based on the calculated subchannel numbers from the BS and neighboring BSs, and the allocated subchannels are allocated to the MSs.

Abstract: An arbiter performs arbitration over a plurality of queues and provides data to a plurality of mutually exclusive destinations using combination logic that logically combines a plurality of mutually exclusive vectors into a combination vector. Each of the mutually exclusive vectors corresponds to one of the plurality of mutually exclusive destinations. A number of vector arbiters perform arbitration on each mutually exclusive vector to select a position within the mutually exclusive vector. A combination arbiter performs arbitration on the combination vector to determine a position within the combination vector, which corresponds to the next queue to be serviced. A comparison element compares the position within a mutually exclusive vector and the position within the combination vector to determine the destination of the data within the next queue to be serviced.

Abstract: According to an aspect of the present invention one or more radio units of a wireless device are used to measure or detect clues about the radio propagation environment and type of space that surrounds a wireless device. From the measurements, the wireless device may determine the type of location that it is located within, whether that is simply a determination between inside and outside or a more complex determination of the type of building or space that the wireless device is located within. In either case, this determination can be used to automatically change/adjust the radio system operation parameters the wireless device operates in accordance with. With the type of location determined, a wireless device may then automatically select the appropriate radio system operation parameters for the type of location that it is in and the corresponding regulations that apply.

Abstract: A system and method for service differentiation enabling a user to express the level of importance of a session being established and change the level during the session while satisfying QoS profiles. An extension of the 3GPP IMS architecture includes a Session Prioritization Function (SPF) in communication with a S-CSCF and a Context Information Base (CIB) which provides network contextual information. Upon receiving a session initiation or change request, the S-CSCF queries the SPF for a resource allocation/deallocation decision. The SPF consults session prioritization policies and the contextual information to make an informed decision. If the load on the IMS network is normal or light, the SPF utilizes an upper limit policy to limit resources for each service class. Otherwise, the SPF limits the size of multi-party sessions and utilizes soft and hard preemption to transfer network resources between classes.

Abstract: An exemplary embodiment of the invention relates to a method, system, and storage medium for resolving contention issues by a channel in a fibre optic switch environment that occur during channel program execution. The method comprises a channel receiving a status packet indicating a device is no longer busy. The method also includes specifying whether the channel intends to re-initiate a channel program that previously resulted in the device busy status. If the channel does not intend to re-initiate the channel program, a first combination of bits in a re-initiate field of a status-acceptance packet are set which indicate that the channel will take no further action. If the channel intends to re-initiate the channel program, a second combination of bits in the re-initiate field of the status-acceptance packet are set, indicating that the channel will re-initiate the channel program. The method further includes transmitting the status-acceptance packet to a control unit.

Abstract: A wireless communication method and an image device thereof are provided. The wireless communication method includes determining whether a second, already connected, wireless device exists, if a need to establish a connection to a first wireless device exists; requesting whether to release the wireless connection to the second device, if the second wireless device, which is already connected, exists; and maintaining or releasing the wireless connection to the second wireless device according to the requesting. The image device includes a communication module which is wirelessly connected with a first wireless device; and a controller which requests whether to release the connection to a second wireless device, if there is a need to establish a connection to the first wireless device and a second wireless device is already connected, and maintains or releases the wireless connection to the second wireless device according to the request.

Abstract: A method to schedule network communications includes determining nodes within a network, forming a node list based on the nodes in the network, determining a network schedule of communications for the nodes based on the node list. Determining a network schedule includes determining a timeslot. Each node receives data during the timeslot.

Abstract: When a signal cable is connected between communication nodes 0, 1 which comply with a communication protocol that inhibits loop connection, communication node 0 detecting connection of the signal cable transmits a loop test signal LT having information of a port where connection was detected (e.g., information of a transfer rate between ports). In response to the loop test signal LT, a communication node 2 adds information of its own port that received the loop test signal LT, that is, P(2, 1), to the received loop test signal LT, and repeats the loop test signal LT. Similarly, communication node 1 adds information of its own port that received the loop test signal LT, that is, P(1, 0), to the loop test signal LT. Communication node 0 specifies a suitable disconnection point of a loop (e.g., a port having a low transfer rate between ports) based on the port information thus accumulated.

Abstract: It becomes possible for a user to set a transmission or reception channel arbitrarily and easily. Each of equipment connected to an IEEE 1394 bus may include a register provided within a RAM 113 to thereby set a transmission or reception default channel. If channels used in the transmission and the reception are not set when the transmission is started, then default channel may be used. When equipment is set to a channel setting mode by operating an operation section 116, a control section 112 may display a channel setting picture on a display section 115. In this state, a user may select a set channel by operating an up-key 116a and a down-key 116b of the operation section 116. Thereafter, when a user operates a “YES” key 116c, the control section 112 may write a selected channel in the above-mentioned register, and ends a default channel setting operation. A user can set the transmission or reception channel arbitrarily and easily.

Abstract: In a spatial division multiple access system that employs acknowledgements to variable length transmissions within a timeout period, a station that has completed its transmission may delay beginning the timeout period until it determines that other stations on the same channel have completed their transmissions.

Abstract: An exemplary embodiment of the invention relates to a method, system, and storage medium for resolving contention issues by a channel in a fiber optic switch environment that occur during channel program execution. The method comprises a channel receiving a status packet indicating a device is no longer busy. The method also includes specifying whether the channel intends to re-initiate a channel program that previously resulted in the device busy status. If the channel does not intend to re-initiate the channel program, a first combination of bits in a re-initiate field of a status-acceptance packet are set which indicate that the channel will take no further action. If the channel intends to re-initiate the channel program, a second combination of bits in the re-initiate field of the status-acceptance packet are set, indicating that the channel will re-initiate the channel program. The method further includes transmitting the status-acceptance packet to a control unit.

Abstract: Certain exemplary embodiments provide a method for providing multiple access to a communication channel, the method comprising: sending a reservation request of a first type into a first selected minislot of a selected frame of an uplink channel when information of a first type is to be sent, the uplink channel having a plurality of frames, each frame having a first selectable number of minislots and a second selectable number of slots, the reservation request of the first type requesting an assignment of at least one slot for transmitting information of the first type in at least one frame that is subsequent to the selected frame.

Abstract: Systems and methods for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system are provided. In one embodiment, a multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprises: a host unit; a plurality of remote units that access the host unit using an orthogonal frequency division multiple access scheme; wherein each of the remote units modulates upstream information into an OFDM signal modulated using a Fourier transform; wherein the host unit receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host unit at the same time; wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone.

Abstract: A method for reducing Internet bandwidth used for data transfer between an originating modem and an answering modem over a VoIP connection is provided. Idle data received from the originating modem is detected by an Internet node. The Internet node does not forward the detected received idle data over the VoIP connection. To keep the modem connection between the originating modem and the answering modem alive, the Internet node regenerates idle data and transmits the regenerated idle data to the answering modem upon detecting no data received for forwarding to the answering modem.

Abstract: In an access point operating in a wireless local area network, a method is disclosed for assisting a radio manager to manage a radio environment without location information. By performing radio discovery to receive beacon signals from neighboring access points, an initial configuration of a radio environment is generated based on the received beacon signals. Measurements are received from a client device that performs measurements by a user walking through a desired coverage area while operating the client device and the radio configuration is adjusted based on the received measurements.

Abstract: A broadcasting system which can monitor all input devices for their operating conditions, the broadcasting system includes input devices 11-1M for receiving sound, output devices 31-3N for broadcasting sound, and a controller 4. These features are interconnected through a network 2. In response to a broadcasting request from an arbitrary input device, the controller 4 delivers routing data indicative of a combination of the input device, which has made the broadcasting request, with an output device which should broadcast the sound from the input device to all the input devices 11-1M. The routing data includes priority data indicative of a priority thereof, so that a display unit of each input device makes a display based on the priority data included in the routing data when it receives the routing data from the controller 4.

Abstract: An electronic system comprises a defined number N of functional modules, including a defined number P of initiator modules and a defined number Q of target modules, where N, P and Q are integer numbers such that 2?P?N and 1?Q?N. In the event of a plurality of conflicting requests to access a common resource originating from a plurality of respective initiator modules, an arbitration unit grants an exclusive right of access to the resource to a defined one of these initiator modules. The arbitration unit is constructed either to apply a standard arbitration mechanism to these respective initiators, or to apply as a priority a specific arbitration mechanism only to the members of a subset of these initiator modules, for each of which it receives a linked privileged access signal.

Abstract: A method of communicating over a network of nodes using a plurality of broadcast channels. Each channel facilitates the transmission and reception of data during cycles of time divided into discrete time frames. Each frame is divided into a plurality of slots. Each node in the network is configured to broadcast, to other nodes within one hop of said node, on a common bootstrap channel during a first bootstrap slot, slot assignment information relating to any of the broadcast channels. Each node is assigned to communicate over a broadcast channel that is one of the plurality of broadcast channels. Each node broadcasts, on its assigned channel during a second bootstrap slot, slot assignment information relating to the assigned broadcast channel to other nodes within one hop of said node and on said assigned channel. Each node communicates according to the slot assignment information.

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 technique to route data according to a speculative priority. At least one embodiment detects a conflict among a number of data received by the router, assigns a speculative priority to one of the data in a first clock portion and sends the speculatively prioritized data to a receiving agent in a subsequent clock portion.

Abstract: Briefly, a method and apparatus to a channel access parameter to mobile units of a wireless communication network. The channel access parameter may be selected based on the probability of collisions between packets of the wireless network.

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: Methods are disclosed for providing requested access, network-initiated access and autonomous access to communication resources (101-105) by wireless communication unit(s) (112, 114), and for controlling the different types of access using access control identifier(s) assigned to the devices. Requested access requires a communication unit to send a call request (302) to a communication resource controller (106). The request (302) includes at least an identification of the communication unit and an access control identifier associated with the communication unit. Network-initiated access comprises a communication resource controller or other fixed network equipment sending a page request (502) to the communication unit which responds with a page response message (504) including the identification of the communication unit and an access control identifier.

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: This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing inter-systems (cells) coexistence and spectrum sharing. The described method of spectrum sharing mechanism, called On-Demand Spectrum Contention, integrates Dynamic Frequency Selection and Transmission Power Control with iterative on-demand spectrum contentions and provides fairness, adaptability, and efficiency of spectrum access for dynamic spectrum access systems using active inter-system coordination.

Abstract: This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing messaging control for dynamic frequency selection. The method of the invention provides an efficient, reliable and flexible messaging mechanism for DFS decision-making that is critical for licensed incumbent protection and inter-system coexistence of dynamic spectrum access systems.