Abstract: An electronic device of detecting contention of a bidirectional bus for avoiding failing to drive a bidirectional bus due to bus contention includes: an output terminal, an input terminal and a data output unit, a timing comparing controller and a comparing unit. The output terminal is coupled to the bidirectional bus and used for outputting a data output signal to the bidirectional bus. The input terminal is coupled to the output terminal and the bidirectional bus and used for receiving a data reception signal from the bidirectional bus. The data output unit is used for providing the data output signal. The timing comparing controller is used for generating a timing comparison signal according to the data output signal. The comparing unit is used for comparing the data reception signal with the data output signal according to the timing comparison signal to determine a contention state of the bidirectional bus.

Abstract: Methods, systems and devices for sharing communication resources among a plurality of clients (200-204) that are part of a common wireless community (1000). The communication resources are, for example, Internet access resources (101-104). Another example, might be a video or data delivery communication resource. As an example, clients have separate Internet access accounts. Embodiments of the invention, for example, allow client business units or residential units to share separate Internet access accounts.

Abstract: Systems and methodologies are described that facilitate dynamically scheduling orthogonal resource sets for reuse by user devices to reduce inter-cell interference by evaluating an overall scheduling metric for each user device in a wireless communication region. The overall scheduling metric can be evaluated by determining a fairness metric for each user device in a wireless communication region, an overall channel peak desirability metric for each user device, and a channel delay desirability metric for each user device. The overall scheduling metric can be the function of the fairness metric and one or more of the overall channel peak desirability metric and the channel delay desirability metric. A user device with a highest overall scheduling metric score for a given round of dynamic scheduling can be awarded an orthogonal resource set.

Abstract: A wireless resource allocation apparatus and method which maintain quality of service (QoS) in a wireless communication network are provided. The wireless resource allocation method includes calculating the number of medium access slots (MAS) to be allocated to at least one of a plurality of divided zones of at least one superframe, designating a reference location for MAS allocation to divided zones out of the plurality of divided zones of the superframe based on the calculated number of medium access slots, and allocating the medium access slots to the divided zones based on the designated reference location. Accordingly, more uniform service intervals can be supported, and thus efficient MAS resource allocation can be performed to satisfy media access control (MAC) based QoS requirements.

Abstract: A method of transmitting data is disclosed. The method transmits data from a source device over a contention channel in a centralized network to more than one device on the channel, including a central coordinator. The method then waits for a data acknowledgment signal from the central coordinator as an indicator of successful reception of the data by any device to which the data was transmitted.

Abstract: Provided is a method and apparatus for controlling an event of a cable modem and reporting a status of the cable modem, the method including: determining whether to periodically allocate a transmission bandwidth of a CM-STATUS message with respect to an event occurrence of the cable modem; setting an event control encoding that includes information regarding whether to periodically allocate the transmission bandwidth; and generating a MAC Domain Descriptor (MDD) message containing the event control encoding to transmit the generated MDD message.

Abstract: A technique is provided for determining estimated location of a wireless communication device (WCD) in a network. A first AP transmits a first RSSI data request message, including a BSSID to the WCD at a first time over a radio channel. The WCD then transmits a first response message to the first AP, which then transmits a first measured RSSI value to a trilateration engine (TE). At a different, second time, a second AP can switch to the radio channel and transmit a second RSSI data request message that includes the BSSID of first AP to the WCD over the radio channel. In response, the WCD transmits a second response message to the second AP, which then transmits a second measured RSSI value to the TE. A third AP performs a similar message exchange. This technique collects RSSI information from the WCD at the APs without disrupting any of their connections.

Abstract: A method of changing channels of a first device in a wireless network, which includes a first coordinator and at least one device, comprises searching whether another channel other than a first channel which is currently used in the wireless network is available, changing the first channel to a second channel among at least one or more available channels as a result of the searching step, and transmitting data to a second device or receiving data from the second device through the second channel.

Abstract: a communication system comprises a plurality of downstream transmission systems configured to transmit downstream wireless communications to an area having a plurality of sectors over a plurality of downstream channels to a plurality of users in the plurality of sectors and a plurality of upstream receiver systems configured to receive upstream wireless communications over a plurality of upstream channels from the plurality of users in the plurality sectors. In an embodiment, the plurality of upstream channels comprise multiple contention channels associated with each of the plurality of sectors and a plurality of bearer channels associated with each of the plurality of sectors and the plurality of upstream receiver systems are further configured to receive a plurality of requests from the plurality of users over the multiple contention channels for access to the plurality of bearer channels.

Abstract: A method for communications between neighboring wireless cells such as wireless regional area networks operating according to IEEE 802.22 specifications. The method involves scheduling inter-base station communications for over-the-air connections to allow neighboring base stations to communicate in environments where a single available channel is shared between the neighboring cells or where two or more channels used by two or more neighboring cells. In some embodiments, a bridge system, such as a bridge consumer premise equipment (CPE), positioned in an area of coverage overlap between two cells is used for inter-base station communications, and allocation and scheduling of bandwidth on the utilized channels is performed to provide interference free communications between the base stations. Existence announcements are provided in coexistence time slots and requests for bandwidth such as reserved and additional time slots are transmitted between the base stations using the coexistence time slots.

Abstract: The present invention relates to a method of releasing a network connection with a link of a medium access control layer previously accessed before performing a handover to a heterogeneous network in a mobile terminal configured with a multi-mode (e.g., interface between IEEE802.16 and IEEE802.il, interface between IEEE802.16 and 3GPP/3GPP2 or interface between IEEE802.il and 3gPP/3GPP2). In a multi-mode mobile terminal, the present invention includes the steps of creating a connection with a new link, generating a trigger event indicating a connection creation with the new link, and generating a trigger event instructing a connection release from an old link.

Abstract: A method includes receiving a schedule of transmission start slots on a network node, the slots representing reserved and/or nonreserved opportunities for initiating data transmission by at least one network device in a network, the reserved opportunities associated with specific network devices, and the non-reserved opportunities available for non-reserved use by any network device on the network, and adjusting the schedule in accordance with successful transmissions by other network nodes. Another method includes generating a schedule of transmission start slots on a master node, where the slots represent reserved and/or nonreserved transmission initiation opportunities for the initiation of data transmission by at least one of a plurality of network devices in a network, the reserved opportunities being associated with specific network nodes, and the nonreserved opportunities being available for nonreserved use by any the network devices on the network, and distributing the schedule to the network devices.

Abstract: A system controls the transfer of data. The system receives a request to transfer data and determines whether a counter value equals or exceeds a threshold. The counter value represents an amount of time since a previous data transfer. When the counter value equals or exceeds the threshold, the system transmits the data. In another implementation, the system tracks the amount of data read from a buffer. The system reduces the speed at which data is read when the amount of data read from the buffer exceeds a threshold.

Abstract: An arbiter for a device arranged to be coupled to a serial bus, the arbiter comprising a means for obtaining identifier information associated with one more other devices coupled to the serial bus and; means for determining a priority level based upon an identifier associated with the device and identifier associated with one of the other devices.

Abstract: The present invention relates to the field of contention in a network of communicating nodes. The present invention especially relates to a master node for a communication network, to a slave node device for a communication network, to a network comprising the master node device and at least one slave node device and to a method of contention in a network of nodes. The method of contention according to the present invention is method in a network comprising slave nodes, said slave nodes comprising a group of first slave nodes, the method comprising the step of sending, by every first slave node participating in a contention, a number of two or more contention participation messages during a contention window associated with the first slave node.

Abstract: A wireless LAN includes two interfaces with a transmitter-receiver function and a channel controller. One of the two interfaces employs one communication channel to search for a communication channel being used by a destination communication unit. The channel controller determines a surrounding radio wave condition based on the communication channel obtained by the searching, and controls channel setting so that the respective communication channels of the two interfaces differ from each.

Abstract: One embodiment of the present invention provides a system for facilitating proportionally fair-share time slot reservations with a fast increase, slow decrease rate controller in an ad hoc dynamic wireless broadcast network. During operation, the system determines local time slot demand, based on transmitted and queued data corresponding to one or more previous decision points. Next, the system broadcasts the local time slot demand to one or more neighbors. The system also determines neighbor time slot demands, where a respective neighbor time slot demand indicates a particular neighbor's local time slot demand corresponding to one or more previous decision points. Next, the system determines neighborhood time slot demand, based on the local time slot demand and the neighbor time slot demands. Next, the system determines allowable reserved time slots based on the local time slot demand and allowable reserved time slots corresponding to one or more previous decision points.

Abstract: A method comprising modifying a plurality of access channel (AC) probe parameters using a plurality of intra-user service classes, and accessing an AC using the modified AC probe parameters. The disclosure includes a communications component comprising a processor configured to implement a method comprising recognizing a registration request from an access terminal (AT), wherein the registration request causes a quality of service (QoS) profile comprising an inter-user QoS class for the AT to be requested, retrieving at least one intra-user access service parameter based on the inter-user class, and sending the intra-user access service parameter to the AT. The disclosure also includes a mobile access network comprising an access node (AN) in communication with a plurality of ATs, wherein the AN differentiates service for the ATs based on inter-user service classes and intra-user service class types.

Abstract: A coexistence controller which performs management and control of time division for coexistence, is provided in a power line communication modem which has a function as a QoS controller for a QoS type communication system and a power line communication modem for a best-effort type communication system. In the QoS type communication system, by controlling allocation of a communication band in accordance with priorities given to the communication systems by cooperation of the coexistence controller and the QoS controller, the power line communication systems having different schemes can coexist.

Abstract: Device, system and method of wireless communication of base stations. In some demonstrative embodiments a method may include, for example, transmitting a downlink transmission over a frequency band from a first base station during a first time period; and receiving at a second base station an uplink transmission over the frequency band during a second time period at least partially overlapping the first time period. Other embodiments are described and claimed.

Abstract: The invention concerns a method for the rate regulation of radio link probing in a communication network comprising at least a receiver terminal and at least one transmitter terminal, characterized by the steps, at the level of the receiver terminal, of: determining the amount of data sent by each transmitter terminal to the receiver terminal through respective radio links, when a probing of a link is to be made, probing the link corresponding to the transmitter terminal having sent the greatest amount of data.

Abstract: A novel network architecture that integrates the functions of an Internet protocol (IP) router into a network processing unit (NPU) that resides in a host computer's chipset such that the host computer's resources are perceived as separate network appliances. The NPU appears logically separate from the host computer even though, in one embodiment, it is sharing the same chip.

Abstract: A method of and system for time-division-based channel collision collaboration in a wireless communication system including at least two Wireless Regional Area Networks (WRANs) with overlapping service areas that employ dynamic frequency hopping is provided. The method includes performing, by at least one Consumer Premise Equipment (CPE) located in an overlapping portion of service areas of at least two WRANs, spectrum sensing and feeding idle channel information back to respective Base Stations (BSs) of the at least two WRANs, broadcasting, by each of the at least two WRANs, a pre-occupation announcement message for a qualified idle channel, and determining, by a WRAN with the highest priority of the at least two WRANs, a time resource allocation for WRANs in a channel collision state of the at least two WRANs. The method addresses problems, such as a large delay and impaired wireless access due to an absence of an idle channel for adjacent WRANs, may be avoided, while the WRANs may maintain their QoSs.

Abstract: Systems and methods of reporting access violations in a network device are disclosed. One such method comprises setting a forwarding index field in a specific entry of an access control list (ACL) to reference a specific forwarding table entry (FTE). The specific FTE is the only FTE associated with reporting access violations. The method further comprises setting a next destination field in the specific FTE to indicate a copy-to-processor behavior. The method further comprises setting the next destination field in the specific FTE to indicate a drop behavior. The setting of the next destination field is responsive to a timeout on a timer associated with reporting access violations.

Abstract: A method and system access a channel in a wireless network of nodes. A coordinator transmits periodically a beacon, in which time between two consecutive beacons constitute a beacon interval. The coordinator and other nodes transceive a superframe during the beacon interval, in which the superframe begins with an active interval, which is immediately followed by an inactive interval, and in which the active interval begins with a contention free period, which is immediately followed by a contention access period, which is immediately followed by the inactive interval.

Abstract: A system and method for providing a polling scheme to improve medium access control (MAC) in a multihop wireless communication network (100) comprising nodes (102) and access points (106). When an access point (106) is the source of data packets being transmitted to a neighbor node (102), a collision-avoidance protocol is employed for the communication. However, when the access point (106) is to be the receiver of data packets transmitted from a neighbor node (102), the access point (106) polls the neighbor node (102) by initiating contact with the neighbor node (102) and inviting the neighbor node (102) to send queued data packets to the access point (106). As a result, the polling process allows the access point (106) to gain limited control over its neighbor nodes (102) and increase the efficiency of the network (100).

Abstract: A system and a method allowing a user terminal (18) in a network to simultaneously access a plurality of radio based access networks (19, 20) of diverse access technologies. Characteristic features of the invention are access selection adapters (22, 23), each one associated with a respective radio based access network, and an access technology independent access selector (26). An access adapter has means (32) for receiving access technology dependant information from its respective access network and means (31) for translating the information into access technology independent status information. The access selector comprises an access selection algorithm (33) interacting with applications (27) resident in the user terminal and with each access adapter for selection of a radio access network based on an individual QoS profile associated with each respective application and on said access technology independent status information. The invention also relates to a method for service scheduling.

Abstract: A multi-channel TDMA network having priority based is provided. A network includes a plurality of channels, and a plurality of nodes adapted to transmit and received data. Through each channel, every node is coupled to communicate data with every other node. Within each channel, each node is assigned a unique priority rank. Only the node with the highest priority rank is permitted to transmit data during a time slot. For each channel of the multi-channel network, the plurality of nodes are ranked in a different priority direction.

Abstract: Techniques to enable efficient operation of co-located WLAN and Bluetooth devices are described. A station (e.g., a cellular phone or a laptop computer) determines the activity of a Bluetooth device and ascertains idle periods of the Bluetooth device. The station communicates with an access point in a WLAN during the idle periods of the Bluetooth device. The station may operate in a power save mode with the access point, send a poll frame to the access point during an idle period, and retrieve the buffered data from the access point during the idle period. The station may also operate in an unscheduled APSD mode with the access point, send a trigger frame to the access point during an idle period to start a service period, and exchange data with the access point during the service period.

Abstract: Device, system, and method of adjusting a contention window for wireless transmission. In some embodiments, a wireless communication unit may control transmissions of a wireless communication device in a wireless area network during a contention period, wherein the wireless communication unit is to select a back-off period within a contention-window having a contention-window size, which is adjusted based on a number of stations included in the wireless area network, and wherein the wireless communication unit is to wait for the back-off period prior to beginning a wireless transmission during the contention period. Other embodiments are described and claimed.

Abstract: A communication method and apparatus for a distributed network system where a cognitive radio (CR) technology is used. A communication method of a distributed network system where the CR technology is used includes transmitting adjacent channel information, from at least one first neighbor node adjacent to a source node, first adjacent channel information of the at least one first neighbor node using a pulse signal according to a request of the source node; by transmitting, from at least one second neighbor node adjacent to a destination node, second adjacent channel information of the at least one second neighbor node to the destination node using a pulse signal according to a request of the destination node; and exchanging data between the source node and the destination node using a channel that is not currently used, according to the transmitted adjacent channel information.

Abstract: A plurality of user terminals shares an uplink channel having a plurality of subcarriers according to a contention based random access protocol. Each user terminal is assigned one or more primary subcarriers, which are reserved for specific user terminals. In addition, a pool of supplemental subcarriers is available for use by any user terminal. When a user terminal sends a data packet, the user terminal transmits at least a first portion of the data packet on its assigned primary subcarriers. If additional subcarriers are needed, the user terminal autonomously selects one or more supplemental subcarriers from the pool to transmit a second portion of the data packet. The access point knows a priori which ones of the user terminals are assigned to each of the primary subcarriers. When a user terminal selects one or more supplemental subcarriers, the user terminals send to subcarrier selection information to the access point.

Abstract: Quality of Service (QoS) support is provided by means of a Tiered Contention Multiple Access (TCMA) distributed medium access protocol that schedules transmission of different types of traffic based on their service quality specifications. In one embodiment, a wireless station is supplied with data from a source having a lower QoS priority, such as file transfer data. Another wireless station is supplied with data from a source having a higher QoS priority, such as voice and video data. Each wireless station can determine the urgency class of its pending packets according to a scheduling algorithm. Pending packets in a given urgency class are transmitted before transmitting packets of a lower urgency class by relying on class-differentiated urgency arbitration times, which are the idle time intervals required before the random backoff counter is decreased.

Abstract: An access communication node which connects to a mesh network including a plurality of communication nodes, the access communication node including: a receiving unit receiving first operation slot information of a first communication node and second operation slot information of a second communication node from the first communication node capable of directly transmitting data to the access communication node, the second communication node being capable of directly transmitting data to the first communication node and incapable of directly transmitting data to the access communication node; a slot selection unit selecting an operation slot of the access communication node based on the first operation slot information and second operation slot information; and a slot information transmission unit transmitting operation slot information about the selected operation slot to the first communication node.

Abstract: A method and apparatus for guaranteeing fairness regarding access to a medium among a plurality of stations in a wireless local area network (WLAN) where a plurality of high throughput (HT) stations and a plurality of 802.11 legacy stations coexist are provided. In the WLAN, information that allows a plurality of hearing legacy stations and a plurality of hearing HT stations which receive a data frame having an HT format transmitted by a transmitting HT station to fairly contend for use of a medium is transmitted as a frame having a format that can be interpreted by all the legacy HT stations. Therefore, the legacy stations can contend for a medium under the same conditions as the HT stations.

Abstract: Techniques involving wireless communications are disclosed. For instance, an embodiment provides an apparatus having a first transceiver and a second transceiver. The first transceiver engages in wireless communication using a first technique that employs control packets. The second transceiver engages in wireless communication using a second technique. The second technique may establish a transmission priority over the first technique. Also, the first transceiver may refrain from transmitting the control packets at predetermined times to prevent collisions with prioritized transmissions received by the second transceiver.

Abstract: In a trading system market data from a matching engine is distributed by a broker to a plurality of trading floors repeatedly every T seconds, typically one second. This one second distribution period is divided into a plurality of time slots and each trading floor is randomly assigned to a slot. Data for a given trading floor is calculated and distributed during the time slot assigned to that floor. The position of a trading floor relative to others is varied by swapping a pair of adjacent time slots every J distribution periods.

Abstract: During the transmission of subscriber-specific data, particularly via a transfer medium and according to a transmission principle based on time slot transmission with time slot separation, the transfer medium used by several subscribers can also be efficiently used when the data rates of the data transmitted in the transmission direction (SRI) and the reception direction (ERI) for at least one subscriber using the transmission are differently, i.e. asymmetrically distributed. To this end, the data to be transmitted for each subscriber are transmitted, as in the case of a symmetric data distribution, in at least two time slots (ZS) per a periodically returning time frame (ZR, ZR1, ZR6) and corresponding to the asymmetrical distribution of the ratio of a number of transmission data packets (SDP) to reception data packets (EDP) in a plurality n half time frame of the time frame (ZR, ZR1 ZR6) with n being greater or equal to 2 or ? N.

Abstract: The present invention concerns methods and apparatus for implementing a multi-user advance reservation system where reservations are specified in terms of flexible constraints, inflexible constraints and business values. The specification of reservations in this manner allows an entity managing the reservation system to arbitrate among reservations received from a user population with a view toward maximizing business value across the user population. In methods and apparatus of the present invention, penalties and rewards associated with various reservation outcomes can be specified in reservations to assist in business value maximization. In an example, a reservation having a low business value may be declined when there is a significant possibility that a reservation having a high business would be submitted during the pendency of service delivery to the user issuing the reservation with a low business value.

Abstract: A data processing circuit on an integrated circuit and an associated method of processing data in the data processing circuit is provided, the data processing circuit comprising a network operable in successive time-slots; a plurality of data processing units interconnected by the network, and arranged to send streams of messages concurrently through the network, each stream comprising messages that occupy shareable resources in the network in a periodically repeating selection of successive time-slots, a period of repetition (P) being the same for all the streams; node circuits in the network arranged to forward the messages along multi-node paths through the network, each particular stream being assigned a respective stream specific path along which the node circuits forward all messages of the particular stream, the node circuits being arranged to decide whether to forward or discard each message dependent on a measure of seniority of the message in its particular stream.

Abstract: A node may include a receiver configured to receive signals transmitted from a gateway and a logic device coupled to the receiver. The node may also include a memory configured to store label information identifying a data packet stored in the node. The logic device may be configured to receive a message from the gateway, where the message includes label information, and access the memory to identify a data packet based on the label information included in the message. The node may also include a transmitter configured to transmit the data packet to the gateway over a channel shared with a number of other nodes.

Abstract: The invention relates to a crossbar switch controller including an input terminal configured to receive a set of service request signals from a set of virtual output queues each comprising a set of packets. The invention also includes a matrix circuit coupled to the input terminal and configured to represent the set of service request signals in the form of a matrix, wherein each service request signal is described by a row position M and a column position N. The invention further includes an output terminal configured to receive a portion of the set of packets during an epoch, an arbiter circuit configured to iteratively scan the matrix during the epoch and issue the set of grant signals to the virtual output queues to determine which service requests are granted, and an arbiter controller configured to initiate the arbiter circuit with an array of non-conflicting matrix elements.

Abstract: A method and corresponding system for communicating between stations in a network are presented. The method includes providing repeated beacon transmissions from a coordinator station for coordinating transmissions among a plurality of the stations; transmitting from a first station to a second station during a time slot assigned to the first station by at least one of the beacon transmissions; and transmitting from the first station information that grants permission to the second station to transmit during at least a portion of a time slot assigned to the first station.

Abstract: Apparatus and a method for transmitting a plurality of streams of data packets through a computer network assigns queued packets from each of the plurality of data streams to respective slots in scheduling windows such that queued packets from respective ones of the plurality of data streams occupy different slots in respectively different ones of the scheduling windows. The packets are transmitted through the network in the order defined by the scheduling windows.

Abstract: In a network comprising a source, a destination, and intermediate nodes along a route between the source and the destination, techniques are provided for allocating one or more time slots to transmit a particular data stream along the route based on the QoS requirements to transmit the particular data stream. In one implementation, a Scout Request message (SRM) is sent from the source to the destination to allocate time slots along the route to transmit a particular data stream to the destination. The SRM can include QoS requirements to transmit the particular data stream. Each intermediate node along the route can allocate one or more time slots to transmit the particular data stream based on the QoS requirements needed to transmit the particular data stream along the route.

Abstract: A wireless communication device, a wireless communication system and a method of allocating a time slot during peer to peer communication over a millimeter wave wireless channel. The allocation of the time slot is done by truncating a channel time allocated time slot and releasing a truncated channel time allocation time slot for communication without a piconet network controller intervention and dynamically allocating a contention access period utilizing the released channel time of the allocated time.

Abstract: Embodiments include systems and methods for scheduling transmissions of information in a wireless network. Embodiments comprise determining a service interval that is a multiple of a service interval granularity period, the multiple depending upon a type of information to be transmitted during the service interval.

Abstract: Enhanced power saving methods and systems for a powerline network improve power conservation by adaptively regulating the monitoring of a shared carrier sense multiple access (CSMA) region of a beacon period based on current need. The methods and systems include one or more enhanced power saving modes (EPSM). In some embodiments, EPSM include one or both of an enhanced priority resolution (EPR) mode and an enhanced idle sensing (EIS) mode. In some embodiments, an EPSM is selected from a plurality of EPSM in response to an EPSM indicator detected in a beacon region of the beacon period.

Abstract: The real-time aspects of keep-alive generation are removed from the dynamic routing protocol (DRP) application and are embedded within a Unix-based operating system, which is programmed by DRP. A keep-alive control provides the ability to create a keep-alive message and a timeout interval on a TCP socket. Each socket can have an independent keep-alive message and timeout interval. A keep-alive message is sent whenever the TCP socket sends no normal user output for a duration exceeding the timeout interval. A timeout interval is normally specified in seconds and a keep-alive message is user definable and must not exceed a predetermined length in bytes. System calls are used to set the timeout interval and keep-alive message independently. Both a timeout and a keep-alive message must be set before the timeout becomes active.

Abstract: A network, such as a radio network, uses dynamic transmission scheduling and soft clustering. When nodes contend for data slots, each node that is successful continues to have its data slot reserved for it until it sets an end-of-stream bit in an information summarization packet, indicating that it will stop broadcasting. From the information summarization packets, each node determines the other nodes to which it will listen, based on proximity and information content.