Abstract: Disclosed herein are various embodiments of collision avoidance systems and methods. One method embodiment, among others, comprises a client sending an end of transmission (EOT) request to an access point (AP), and responsive to the EOT request, the AP responding with an EOT frame.

Abstract: A system and method are disclosed that may provide an accurate estimate of an AP's available medium share. The AP may perform a plurality medium access contention operations to determine a duration of a transmit opportunity and a queue service interval for each of a plurality of access categories. The AP may also determine a queue service interval for a number of packet queues associated with each of the access categories. The AP may use timing information derived from the medium access contention operations to estimate a portion of the medium share available on a per-access category and/or per-user basis. The timing information may include the transmit opportunity durations and queue service intervals for the access categories, the queue service intervals for the individual packet queues, and/or values indicative of the AP's PHY rate and medium utilization.

Abstract: A method and apparatus for managing device discovery in a wireless system are provided. The method includes performing a periodic search operation to discover a peer device, stopping the periodic search operation upon discovering a suitable peer device, and switching to a periodic listening operation for allowing the Wireless Fidelity (WiFi) Peer-To-Peer (P2P) device to be discovered by the discovered peer device and for permitting a connection with the discovered peer device.

Abstract: A method for wireless communications is disclosed that includes generating and interpreting multicast block acknowledgement frames. Group identifiers and apparatus identifiers are used for indicating the presence of aggregated acknowledgement information and for extracting acknowledgement information for individual stations.

Abstract: An apparatus including a first register, a second register, and a control logic. The first register may be configured to store requests from a plurality of clients for a current cycle. The second register may be configured to store an indicator value indicating which of the plurality of clients received a grant in a previous cycle. The control logic may be configured to determine which of the plurality of clients having a request in the current cycle receives a grant based upon (i) a pointer value and (ii) the indicator value.

Abstract: Examples are disclosed for assigning a switch identification to data received at an input/output device coupled to a host device. In some examples, the data may be associated with a virtual station interface (VSI) for a virtual machine implemented at the host device. For these examples, a switch identification may be assigned to the data based on identification information for the data or an originator of at least a portion of the identification information. The assigned switch identification may then be used as part of a lookup table to determine one or more actions for processing the data at the input/output device. Other examples are described and claimed.

Abstract: There is described a module for detecting an electronic file, the module embodied on a computer readable medium and configured for: receiving a portion of a file and extracting content from the portion; applying an initial hashing function numerous times to the content, the initial hashing function being applied to each one of a plurality of blocks of elements within the content and resulting in a representation for each one of the blocks; selecting one of the representations from multiple representations as an initial imprint for the file portion; comparing the initial imprint to contents of a first memory containing a plurality of detection imprints for known electronic files to be detected, the detection imprints having been created using at least the initial hashing function; and determining a match when the initial imprint corresponds to a detection imprint in the first memory.

Abstract: A method, apparatus, system, and computer program product example embodiments of the invention are disclosed to structure access to a wireless medium to reduce interference between nearby nodes. In example embodiments of the invention, a method includes the steps of determining an amount of available wireless communication resources in a reception area; determining a number of wireless communication nodes in the reception area; generating a reservation limit of the available wireless resources; determining an inability to allocate the reservation limit of the available wireless resources; transmitting a request for release of resources to at least one other wireless communication node. Another node receiving the request, performs a method including the steps of determining a threshold; comparing an allocated amount of wireless communication resources against the threshold; and releasing at least a part of the allocated amount of resources, if the reserved number is greater than the threshold.

Abstract: A wireless communication device and a method to establish a protected time for communication over a direct link between two stations of the same network. The method includes configuring at least one antenna for a direct link establishment, switching to a listening mode and waiting for a channel time allocation (CTA) for transmission. After receiving the CTA a source station sends a first frame to a destination station based on a channel time allocation value and receive a second frame from the destination station to complete an establishment the CTA.

Abstract: A request to establish a call involving a wireless communication device (WCD) served by a radio access network (RAN) may be received. The WCD may receive signals from the RAN via a plurality of wireless coverage areas at respective signal strengths. The plurality of wireless coverage areas may be defined by the RAN. A media codec to use for the call and a target bitrate for the media codec to use during the call may be determined. Based on the target bitrate, a set of n wireless coverage areas through which the WCD and the RAN communicate during the call may be selected. The value of n may be between one and a predetermined maximum number. The set of n wireless coverage areas may be selected from the plurality of wireless coverage areas.

Abstract: A radio base station BTS includes an estimation unit 13 configured to estimate a time when a buffer of a scheduled mobile station UE becomes empty based on a remaining amount of data in the buffer of the mobile station UE, the remaining amount reported by the mobile station, and a sending unit 15 configured to send the mobile station UE a Zero Grant instructing to stop transmission of a data signal via an E-DPDCH based on the estimated time.

Abstract: A cable modem termination system (CMTS) is disclosed that allocates one or more minislots of a super-frame arrangement to cable modems for upstream transmission. The super-frame arrangement includes multiple minislots that correspond to multiple communication channels of one or more super-frames. The CMTS receives requests for upstream bandwidth from the cable modems. The CMTS continuously allocates the minislots of the super-frame to provide upstream bandwidth grants to accommodate these requests. The CMTS communicates the upstream bandwidth grants as a single upstream bandwidth allocation map (MAP) to the cable modems.

Abstract: Aspects of a method and system for scheduling multiple concurrent transmissions during a contention access period in a wireless communications network are presented. Aspects of the system comprise communicating devices (DEVs) within a piconet that are operable to derive a neighborhood map of a piconet. The neighborhood map information may enable a plurality of DEVs to concurrently transmit signals during a given channel time allocation (CTA) time slot. The ability for multiple DEVs to transmit signals concurrently during a single CTA time slot may increase spectral reuse within a wireless communication medium. In another aspect the system, the neighborhood map information may enable individual DEVs to set clear channel assessment (CCA) thresholds. Individual DEVs may utilize CCA threshold information to determine when to transmit signals to one or more destination DEVs and/or at what rate to transmit data via the signals.

Abstract: Embodiments enable prioritization and selection of network access points (NAP) by a computing device using NAP attribute values. The computing device obtains the attribute values based on a location of the computing device and/or proximate NAPs detected by the computing device. The obtained attribute values are compared to a state of the computing device (e.g., sensor values), user preferences, or other criteria to select at least one of the NAPs for connection with the computing device. In some embodiments, a user of the computing device is presented with a list of Wi-Fi access points ranked according to relevance to the computing device and/or user.

Abstract: Systems and methodologies are described that facilitate assigning uplink resources for utilization by a mobile device for sending an uplink signal in an uplink coordinated multi-point (CoMP) wireless communication environment. For instance, a hopping tree can be defined across base stations, and neighboring base stations can schedule interfering mobile devices upon uplink resources mapped to different nodes from the hopping tree. By way of another example, a plurality of hopping trees can be employed across base stations in the uplink CoMP wireless communication environment. Moreover, an acknowledgment can be sent to the mobile device upon downlink resources identified as a function of the uplink resources. Further, the downlink resources can be distinct from disparate downlink resources utilized for sending an acknowledgment to a disparate mobile device from a neighboring base station.

Abstract: A technique is disclosed to schedule frame transmissions in a wireless local area network. The network includes a plurality of stations configured to communicate on the same frequency channel with a plurality of access points. A central controller examines the transmission characteristics between the various stations and access points and identifies frames that may be simultaneously transmitted by a subset of the access points to their intended stations.

Abstract: Systems and methods for coexistence of WLAN and Bluetooth networks are described. At least one embodiment includes a method for operating a wireless device in both a 802.11 network and a Bluetooth network. In accordance with some embodiments, the method comprises monitoring transmission of Synchronous Connection Oriented (SCO) slots over the Bluetooth network, informing an access point (AP) in the 802.11 network not to transmit to the device before the end of an SCO slot, transmitting a power save trigger to the AP to retrieve buffered data from the AP, and transmitting data to the AP.

Abstract: This application discloses a controller area network (CAN) design and verification tool to identify periodic messages and sporadic messages that a control node is configured to transmit on a shared bus in a CAN design. The CAN design and verification tool can assign placeholders to a schedule table of the control node to define a message transmission schedule for the control node. The placeholders include at least one sporadic message placeholder configured to identify one of a plurality of minor time frames available on the shared bus for the control node to transmit any one of the sporadic messages. The CAN design and verification tool can determine a worst-case latency associated with delivery of a first one of the sporadic messages on the shared bus when the control node utilized the sporadic message placeholder to transmit a second one of the sporadic messages on the shared bus.

Abstract: Certain aspects of the present disclosure provide techniques for detecting presence of a Bluetooth device in the vicinity of a WiFi device by sensing the spectrum of the Bluetooth device using a sequence of energy detection measurements, generating a test statistic based on the measurements and comparing the test statistic to a threshold.

Abstract: Various embodiments provide an apparatus and method for adapting wireless sensor network device operation to ambient RF noise. An example embodiment includes: initializing a noise threshold value to a default value; detecting an ambient RF noise level on a plurality of channels of a wireless network device; if the ambient RF noise level detected on a pre-determined number of channels is above the noise threshold value, adjusting the noise threshold value by an increment and retesting the ambient RF noise level on the plurality of channels; if the noise threshold value exceeds a pre-determined maximum noise threshold value, suspending data communications by the wireless network device; and if the ambient RF noise level detected on a pre-determined number of channels is below the noise threshold value, retaining the noise threshold value and enabling data communications by the wireless network device.

Abstract: A request to establish a call involving a wireless communication device (WCD) served by a radio access network (RAN) may be received. The WCD may receive signals from the RAN via a plurality of wireless coverage areas at respective signal strengths. The plurality of wireless coverage areas may be defined by the RAN. A media codec to use for the call and a target bitrate for the media codec to use during the call may be determined. Based on the target bitrate, a set of n wireless coverage areas through which the WCD and the RAN communicate during the call may be selected. The value of n may be between one and a predetermined maximum number. The set of n wireless coverage areas may be selected from the plurality of wireless coverage areas.

Abstract: A system for signaling an application when a requested data rate and Quality of Service cannot be achieved using OFDM wireless data transmission, and the application proceeds by either renegotiating QoS and data rate, or waiting until they requested rate and QoS are met.

Abstract: Wireless medium reservation for simultaneous transmission of multiple downlink spatial streams to multiple receiver wireless stations during a multi-user transmit opportunity over a wireless medium, is provided. Such a reservation includes reserving a transmission period for simultaneously transmitting data from a transmitting station to multiple intended receiving stations on multiple downlink spatial streams over a wireless communication medium. Reserving the transmission period includes transmitting a multi-user request-to-send (MU-RTS) frame to the multiple receiving stations, the RTS frame including a receiver address (RA) field comprising compressed addresses for the multiple receiving stations. The MU-RTS frame includes an indication field that indicates the RTS frame as an MU-RTS without altering the RTS frame type/subtype.

Abstract: Within a domain of a master device, devices that share a power line as a communications medium monitor signal detection windows to sense network status. The devices transmit sensed network status to the master device. The master device allocates channel resources based on the network statuses communicated by the devices within the domain.

Abstract: A potentially interfering node updatable database associated with the MAC, in each node, contains a limited number of unique identification numbers (UNIDs) referring to nodes likely to interfere with the transmission of the node. Typically these UNIDs are one or two hop neighbors. In addition to the actual nodes, the database also contains unique ID numbers of dummy nodes. Practically, the node database does not distinguish between real or dummy nodes. Selecting a certain node to transmit at a certain TS is brought about by a “which node is to transmit in the next TS” (WINIT) function. This function takes into account all the UNIDs available in the UNID databases of the different nodes. When the WINIT selects a specific UNID to be active in the upcoming TS, the relevant MAC element in the respective node, invokes the transmission.

Abstract: Random access in a wireless communication system including a base station and a wireless terminal, whereby at the wireless terminal, selecting first information used for first random access or second information used for second random access; and transmitting, during or after the completion of random access using selected information, third information with a response message to be transmitted to the base station during random access using information which is not selected.

Abstract: A system manages the integration of a private short-range wireless network into a service/mobility domain with handover of a wireless terminal device between access points registered with a domain server. The server maintains information specifying rules for responding to first wireless terminal devices authorized for private network access and to second wireless terminal devices authorized for shared network access, in response to requests for information on resources available from one or more access points registered with the server.

Abstract: A method and an apparatus for recognizing a Multicast and Broadcast Service (MBS) region in a broadband wireless communication system are provided. In the method, whether a next MBS MAP message transmission point of a first frame and an MBS data burst transmission point indicated by MBS burst assignment information of a second frame match with each other in a third frame is determined. When matching with each other in the third frame, a control message including information for determining a starting point of an MBS region is generated. The generated control message is transmitted during one of the first and second frames.

Abstract: In a wireless multi-hop network, a transmission scheduling apparatus calculates a transmission demand of every node within the wireless multi-hop network, and allocates a time slot to each node by using the transmission demand of each node.

Abstract: Embodiments of the present invention provide for content optimization of a physical layer preamble. In one embodiment of the invention, a method for encapsulating a payload for transmission through a network is disclosed. The method comprises the step of programming a legacy physical layer length value in a legacy physical layer preamble. The legacy physical layer preamble is configured such that it can be received by any legacy stations that may be on the network, and such that a separate physical layer length value can be derived from the legacy physical layer preamble. Using such a system, content optimization of a physical layer preamble is provided.

Abstract: A method and system for directed beaconing in a superframe structure (100, 310, 320, 330, 340) among devices of different types in a Wireless Personal Area Network (WPAN). A first type device directs a second type device to transmit beacons (345, 346) in a beacon group of first type devices, announcing the second type device's time slot reservations (314). The method includes: making a Distributed Reservation Protocol (DRP) reservation (314) of a time period in every superframe; selecting two consecutive beacon slots (325, 326) and indicating the two consecutive beacon slots (325, 326) as occupied; informing the second type device the timing of the two occupied consecutive beacon slots during the reserved time period (327); transmitting a response (338) in the reserved time period by the second type device; and transmitting two beacons (345, 346) by the second type device in the two occupied consecutive beacon slots.

Abstract: Systems and methods for arbitrating among traffic from a coherence point to a switch fabric. A multi-level arbiter is used to avoid starvation while providing fairness and high bandwidth on the connection path between the coherence point and the switch fabric. A first level of arbitration selects packets with enough available credits for forwarding from the switch fabric on a downstream channel. The second level of arbitration arbitrates among short packets at a first arbiter and arbitrates among long packets at a second arbiter. The selected short packet and the selected long packet are forwarded to a third level of arbitration. The third level of arbitration alternates between long and short packets and forwards the selected packet to the switch fabric.

Abstract: A method of determining a broadcast reception state of a broadcast receiving apparatus includes receiving a broadcast signal using a tuner; checking a reception state of the broadcast signal; changing a wireless communication connection state of the wireless communication module if the reception state of the broadcast signal is abnormal and rechecking the reception state; and determining the reception state as an abnormal reception state due to interference with a wireless communication frequency if a result of rechecking the reception state indicates the reception state is normal.

Abstract: The present invention relates to a broadband wireless access system, and more specifically, to a method and apparatus for efficiently allocating resources to terminals in a random access system. The method for performing such a random access procedure of a terminal in a broadband wireless system according to one embodiment of the present invention comprises: transmitting a preamble sequence to a random access region in a base station; and receiving from the base station ACK information indicative of a received state of the preamble sequence. The ACK information receiving step is preferably a step of decoding a map information element that is masked as an identifier of the random access region.

Abstract: The present invention provides a network, in particular for an aircraft and spacecraft, comprising a network line and at least two network access devices which are interconnected by the network line and between which data of different levels of priority can be transmitted, the network access devices being formed so as allocate data with a level of priority allocated to the respective data, at least two different levels of priority being provided for the data depending on the relevance of the respective data, and the data being transmitted on the network line in fixed time slots depending on the level of priority assigned in each case. The present invention further provides a method and an aircraft and spacecraft.

Abstract: A system and method to facilitate voice activity detection and coexistence manager decisions is provided and include identifying a connection utilizing a first resource and a content stream corresponding to the connection, where the first resource conflicts with a second resource. The content of the content stream is classified into multiple levels based on a value of the content and then a priority is assigned to the first and second resources based on the level of the content of the first resource.

Abstract: In one embodiment, conflicts are identified by sending and announcement message from the first node to neighboring nodes from among the plurality of second nodes indicating that the first node intends to participate in a first communication with a first terminal during the current frame, and receiving a report message from any conflicting nodes at the first node, each conflicting node being a node from among the neighboring nodes which intends to participate in a different communication. Conflicts are resolved by selecting one of (1) maintaining a state of the first node as a clear state and (2) changing the state of the first node to a blocked state based on the received report messages. The first communication is scheduled for the current time frame, if the state of the first node is the clear state after the resolving conflicts step.

Abstract: A system and method for wireless communication is disclosed. One aspect of the system includes wireless devices, wherein the wireless devices are capable of establishing a peer-to-peer link by contention-based channel access, and wherein the wireless devices are free to contend any time for accessing a wireless channel. The system may include first and second wireless devices, each of which has a directional antenna system. The first wireless device can determine whether the wireless channel is available for establishing a peer-to-peer link, by repeating sensing whether the channel is idle in different directions each during different slot time periods. The first wireless device can also sequentially transmit multiple requests each in different directions for establishing a link with the second wireless device. The second wireless device can sequentially transmit multiple replies each in different directions for establishing the link with the first wireless device.

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 system and method for scalable multifunctional network communication between presentation devices and service providers are disclosed. A group of consumer premise equipment (CPE) units are coupled to the presentation devices, and a headend control computer receives upstream messages from the CPE units and for sending downstream messages to the CPE units. A group of service provider control subsystems interface between the headend control computer and the service providers. The head end control computer receives messages from the CPE units and transports them to the service provider control subsystems, and the headend control computer receives messages from the service provider control subsystems and transports them to the CPE units.

Abstract: A method for random access in a wireless communication system communicating between a base station and a wireless terminal, the method consists of: at the wireless terminal, selecting first information used for first random access or second information used for second random access and performing a data communication with the base station during or after the completion of random access using selected information.

Abstract: An apparatus and a method for operating as a virtual terminal to participate in competition for medium access while a mobile terminal operates as an access point are provided. In a case where the mobile terminal accesses a medium while competing with a terminal that transmits data of low priority, an apparatus and a method for entering a low power mode to resolve a power consumption problem of the mobile terminal are provided. The apparatus includes a medium competing unit, which allows the mobile terminal to operate as a virtual terminal and participate in competition for a medium access when data to be transmitted does not exist in the mobile terminal operating as an Access Point (AP).

Abstract: A method for transmission of data requires a transmitting node sending a request message identifying at least one time slot that is available for the transmitting node to transmit a data transmission to a plurality of receiving nodes, a first receiving node transmitting a first time slot grant message in response to the request message, a second receiving node transmitting a second time slot grant message in response to the request message, the transmitting node receiving the first and second time slot grant messages, the transmitting node evaluating the first and second time slot grant messages to determine at least one available time slot for transmitting, the transmitting node transmitting at least one confirmation message to the first and second receiving nodes, and the transmitting node transmitting the data transmission in the at least one available time slot identified in the at least one confirmation message.

Abstract: A method (300) for pre-empting data transmissions in a discovery channel. The method comprises scanning the discovery channel to detect at least one data beacon transmitted in beacon slots (230) of a superframe (S310); determining if at least one data beacon was detected (S320); and transmitting a pre-empt beacon if the at least one data beacon was detected (S330).

Abstract: According to various embodiments, a computer-implemented method is disclosed that includes receiving a field in a frame or a frame from the one or more STAs, wherein the field in a frame or the frame includes information on buffered traffic and a timeout value for a given access category (AC); and scheduling the one or more STAs to transmit uplink traffic simultaneously through a polling frame.

Abstract: A wireless network system including a first terminal for sending a request-to-send signal including information on a medium use period to a second terminal before sending data, receiving a clear-to-send signal from the second terminal, and sending data to the second terminal during the medium use period; the second terminal for receiving the request-to-send signal and sending the clear-to-send signal; a third terminal for receiving the request-to-send signal and transmitting data to a fourth terminal during the medium use period; and the fourth terminal. Thus, it is possible to prevent occurrence of a problem that when it is judged that the wireless channel is being used, transmission of the station is suppressed.

Abstract: A wireless communication system including a base station and a wireless terminal, the method includes at the wireless terminal, selecting first information used for first random access or second information used for second random access; and transmitting, during or after the completion of random access using selected information, third information to be transmitted to the base station during random access using information which is not selected, the third information being used by the wireless terminal until the random access using information which is not selected is finished.

Abstract: Disclosed are a method for media access controlling and channel time reservation system and method in distributed wireless personal area networks. A method of media access controlling for a distributed wireless network including at least one device, includes a device of the distributed wireless network, generating a data slot reservation indicator for devices of the same beacon group, and the device, broadcasting the generated data slot reservation indicator. Thus, a slot reservation for communication between devices can be completed in a shorter period of time. Also, capacity of the network can be improved by spatial reuse of channel time.

Abstract: Probabilistic arbitration is combined with distance-based weights to achieve equality of service in interconnection networks, such as those used with chip multiprocessors. This arbitration desirably used incorporates nonlinear weights that are assigned to requests. The nonlinear weights incorporate different arbitration weight metrics, namely fixed weight, constantly increasing weight, and variably increasing weight. Probabilistic arbitration for an on-chip router avoids the need for additional buffers or virtual channels, creating a simple, low-cost mechanism for achieving equality of service. The nonlinearly weighted probabilistic arbitration includes additional benefits such as providing quality-of-service features and fairness in terms of both throughput and latency that approaches the global fairness achieved with age-base arbitration. This provides a more stable network by achieving high sustained throughput beyond saturation.

Abstract: A method and system reduce interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point in the first cell transmits an initial shield packet to deter other stations from contending for the medium. The access point then transmits a beacon packet containing the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires.