Abstract: A method and apparatus are described including transmitting a request-to-send signal, determining if a clear-to-send signal and a reverse direction transmission request signal have been received, transmitting first data, a first block acknowledgement request signal and a reverse direction grant signal responsive to the first determination, determining if a first block acknowledgement signal, second data and a second block acknowledgement request signal have been received, transmitting a second block acknowledgement signal responsive to the second determination, determining if a third block acknowledgement signal has been received and transmitting a fourth block acknowledgement signal responsive to the third determination.

Abstract: Methods and apparatus for access, enablement and control of devices in TV white space are provided. Methods and apparatus for channel scanning by a device are provided that shorten channel scanning time by using a 5 MHz Measurement Pilot frame at a predetermined location within an enabling device's channel, regardless of the operating bandwidth of the enabling device. Also provided are methods and apparatus for multi-band dynamic station enablement that locate information regarding an enabling device's supported regulatory classes and channel numbers within one accessible frame of information and also provide request and response messages to arrange for enablement of a requesting device on a network. Further, methods and apparatus are provided for identifying an interfering device on a network by providing increased information from within a DSE Registered Location element.

Abstract: In one embodiment, a method operable on a mobile communications device is disclosed, the method comprising generating an authentication key for securing a personalized indicium assigned to the mobile communications device, wherein the personalized indicium comprises a Personal Information Number (PIN) that is mapped to at least one identifier associated with the mobile communications device; transmitting a registration request to a network node operable with a wireless network, the registration request having a registration request payload including the authentication key; receiving a challenge message from the network node, the challenge message generated when the network node detects a change of the IP address associated with the mobile communications device, and responsive to receiving the challenge message, executing a challenge response including an authentication value of a challenge string transmitted in the challenge message, wherein the authentication value is created using the authentication key.

Abstract: A Wireless Regional Area Network (WRAN) receiver comprises a transceiver for communicating with a wireless network over one of a number of channels, and a signal detector for use in forming a supported channel list comprising those ones of the number of channels upon which an Advanced Television Systems Committee (ATSC) DTV (digital television) broadcast signal was not detected. The signal detector performs spectrum sensing as a function of power spectral density (PSD) and cyclic spectrum.

Abstract: Methods and apparatus of slot time synchronization for coexistence of 5 MHz, 10 MHz, and 20 MHz systems in TV white space are provided. The methods and apparatus extend concepts used in traditional 802.11 applications in the MAC layer so that networks that overlap in frequency and space can have access opportunities to TV white space channels. Several passive mechanisms are described which use bits of traditional 802.11 MAC Management Protocol Data Units to receive information related to the slot time of other overlapped networks. An active approach is described that uses measurements from a radio resource measurement service to adjust the slot time of stations in a network to that of the lowest bandwidth overlapped network in frequency and space.

Abstract: An apparatus comprising a processor configured to receive a video frame comprising a current block, wherein the current block comprises a plurality of original pixels, compute a plurality of reconstructed pixels based on the original pixels, and use an intra prediction mode to generate a set of prediction pixels based on a set of reconstructed pixels in the plurality of reconstructed pixels.

Abstract: An apparatus comprising a processor configured to receive a current block of a video frame, and determine a coding mode for the current block based on only a bit rate cost function, wherein the coding mode is selected from a plurality of available coding modes, and wherein calculation of the bit rate cost function does not consider distortion of the current block.

Abstract: An apparatus used in video encoding comprising a processor configured to generate a prediction block for a current block, compute a difference between the current block and the prediction block to generate a residual block, wherein the residual block comprises a plurality of residual values, and if the plurality of residual values include at least one non-zero residual value comprising at least one sign and at least one residual level, perform entropy encoding on the at least one sign; and perform entropy encoding on the at least one residual level, wherein one non-residual value comprises one sign and one residual level.

Abstract: An apparatus used in video encoding comprising a processor configured to receive a video frame, select at least one region in the video frame, bypass a quantization step in encoding of the at least one region, for a current block in the at least one region generate a prediction block, subtract the current block by the prediction block to generate a residual block, and selectively bypass a transform step in encoding of the residual block.

Abstract: Methods and apparatus for using 802.11 Wireless LANs in TV white space that allow networks with overlapping wireless regions to coexist. The methods and apparatus offer a solution to the mutated hidden node problem. Wireless devices communicate with a coexistence manager over a backhaul connection. Signals are sent by a low power station indicating a request to use a portion of spectrum. The coexistence manager communicates with a plurality of second stations that transmit at a higher power level. The plurality of second stations either send a signal to the first station indicating that it can transmit, or send signals so that the first station can determine which interference it is receiving, after which the coexistence manager tells the interfering station to transmit a signal to the first station indicating when it can transmit.

Abstract: A method and apparatus for using 802.11 Wireless LANs in TV white space are provided that additionally allows coexistence with non-802.11 devices in the same spectrum space. The method and apparatus extend concepts used in traditional 802.11 applications in the MAC and PHY layers so that WLANs can function over TV white space channels. The method and apparatus also facilitates coexistence of non 802.11 devices and existence with other 802.11 applications by extending the Enhanced Distributed Channel Access mechanism used to provide quality of service. An OFDM system with fixed subcarrier spacing is suggested to accommodate spectrum characteristics (variable center frequency and channel bandwidth) of the TVWS.

Abstract: A method for implementing policy settings in a user device comprising a plurality of applications, wherein the policy settings comprise at least one application policy setting for managing at least one of the plurality of applications and at least one client policy setting for managing the user device, the method comprising determining a set of policy settings for the user device, providing an update of the policy settings and causing implementation of the policy settings by the user device, to control management of the at least one of the plurality of applications and management of the user device.

Abstract: An implementation provides a transmitter that separates sequential portions of data in a first set of data by time intervals allowing a power saving mode (1005). The transmitter transmits the sequential portions of data separated by respective time intervals having lengths configured to allow a receiver to enter and exit a power saving mode between receiving sequentially transmitted portions of data from the first set of data (1010). The transmitter separates sequential portions of data in a second set by time intervals that are not of sufficient length to allow a receiver to enter and exit a power saving mode during the time intervals (1015). The second set of data is then transmitted (1020).

Abstract: A DMB-T receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a broadcast signal, the DMB-T receiver downconverts the received broadcast signal to a received base-band signal and determines a frame number for each frame by correlating groups of the received symbols in adjacent signal frames. In particular, the receiver determines a maximum right-shift correlation value and a maximum left-shift correlation value. If the magnitude of the maximum right-shift correlation value is greater than, or equal to, the magnitude of the maximum left-shift correlation value, then the maximum right shift correlation value is used to retrieve a frame number from a look-up table. Otherwise, the negative value of the maximum left-shift correlation value is used to retrieve a frame number from the look-up table.

Abstract: An encoding method for skipped macroblocks in a video image includes the steps of: adding one indication bit into a picture header for indicating a coding mode for skipped macroblocks in a current image; selecting the coding mode for a macroblock type in the current image according to the number of skipped macroblocks, if it is a run_length coding, then setting the indication bit of the picture header as a status indicating a run_length coding, and encoding the macroblock type in the image by the run_length coding mode; if it is a joint coding, then setting the indication bit of the picture header as status indicating a joint coding and encoding the macroblock type in the image by the joint coding mode of the number of skipped macroblocks and the macroblock type; finally, encoding other data in the current macroblock and writing data into a code stream.

Abstract: The invention relates to a wireless home gateway apparatus and methods of wirelessly delivering audio and/or video programs between a home gateway and a client device and to interference mitigation techniques on such system. Specifically, the invention relates to transmitting an audio video program on a first channel, receiving a control signal from a remote control indicating interference on said first channel, changing the transmission channel to a second channel, and transmitting data indicating said second channel to said remote control.

Abstract: A method for enabling simultaneous data transmissions in a wireless network includes broadcasting a first signal from a first node, receiving the first signal by a second node, and transmitting a second signal derived from the first signal by the second node. The second signal is received by the first node. A third signal is transmitted from a third node to the first node simultaneous with transmitting the second signal. The first node receives a combination signal which includes the second signal and the third signal. The first node then decodes the third signal from the combination signal using the first signal.

Abstract: A method and system for detection of available a white space channel in an area of licensed transmitters includes a detector which utilizes the autocorrelation analysis of a channel in an frequency modulated (FM) band. Calculation of the autocorrelation excludes an initial set of correlation delay values such that large values of autocorrelation are removed. The remaining autocorrelation based on higher correlation delay values exposes the sinusoidal nature of an FM transmitter operating in the selected channel. White space becomes available to a user if no transmitter is detected using the autocorrelation detection method.

Abstract: A wireless mobile communication device includes a processing system, a memory device and software. The software is stored on the memory device and executable by the processing system to receive a policy setting, authenticate a sender of the received policy, and automatically apply the policy setting on the communication device based on a successful authentication of the sender.

Abstract: A preamble identifier flag in a reserved portion of a data field synchronization segment in a digital television (DTV) data field identifies the presence of preamble training data in a forward error correction (FEC) encoded portion of the DTV data field. The data field synchronization segment is not FEC encoded, thereby allowing detection of the preamble identifier flag without FEC decoding. The detection at a receiver of the preamble identifier flag in a DTV data field allows receiver elements, such as an equalizer and a FEC decoder, to more readily obtain and utilize the preamble training data, thereby enhancing reception and/or simplifying receiver design.