With Priority Channel Selection Patents (Class 455/166.2)
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Patent number: 10929326Abstract: A system and method of implementing a firm channel in a computer system are provided. The method including identifying at least one of a channel and a channel path ID (CHPID) as a first firm channel, automatically defining a logical path between a first device and a second device using the first firm channel, and storing the logical path in a configuration file of the computer system, wherein the logical path is accessible at system initialization.Type: GrantFiled: September 19, 2016Date of Patent: February 23, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Scott B. Compton, Dale F. Riedy, William J. Rooney
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Patent number: 10560890Abstract: Embodiments of the present invention provide a roaming network access method and apparatus, where the method includes: obtaining a mobile country code MCC of a roaming area; obtaining a preferential roaming list, where the preferential roaming list is used to indicate information about at least one network that a user preferentially attempts to register with when the user is roaming; selecting a network that matches the MCC from the preferential roaming list and searching for the selected network; and each time a network is found by the searching, attempting to register with the found network. By means of the roaming network access method and apparatus provided in the embodiments of the present invention, duration of network searching performed by user equipment is shortened, time spent by the user equipment on initial network access in the roaming area is reduced.Type: GrantFiled: March 28, 2014Date of Patent: February 11, 2020Assignee: Huawei Device Co., Ltd.Inventors: Yinqing Jiang, Li Shen, Guanzhong Tan, Shujun Dang, Xiaoyan Chen, Xiaojian Liu, Hui Jin
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Patent number: 10555247Abstract: Embodiments of the present invention provide a roaming network access method and apparatus, where the method includes: acquiring, by user equipment, a list of networks with which registration can be successful; searching, by the user equipment, for an available network in a roaming area; each time the user equipment finds an available network, determining, by the user equipment, whether the found available network is recorded in the list of networks with which registration can be successful; and if yes, attempting, by the user equipment, to register with the found available network. According to the roaming network access method and apparatus provided in the embodiments of the present invention, duration of network searching performed by user equipment is reduced, time spent by the user equipment on initial network access in a roaming area is shortened, and user experience is improved.Type: GrantFiled: March 28, 2014Date of Patent: February 4, 2020Assignee: Huawei Device Co., Ltd.Inventors: Shujun Dang, Guanzhong Tan, Feng Zhang
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Patent number: 9706484Abstract: Apparatuses, systems, and methods for user equipment (UE) devices to more efficiently scan frequency bands for potential base stations may include a UE configured maintain a first list of cells for which a cellular scan has been successful and a second list of cells for which a cellular scan has not been successful. The UE may be configured perform a first cellular while camped on a first cell at an expiration of a scan timer and, if the cellular scan is not successful, the increment a first failure count variable associated with the first cell and add the first cell to the second list if the first cell is not present on the first or second list. Additionally, if the first cellular scan is successful, the UE may be configured to add the first cell to the first list if the first cell is not present on the first list.Type: GrantFiled: June 5, 2015Date of Patent: July 11, 2017Assignee: Apple Inc.Inventors: Arvind Swaminathan, Umesh K. Shukla, Srinivas Pasupuleti, Viswanath Nagarajan, Thanigaivelu Elangovan, Madhusudan Chaudhary
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Patent number: 9516639Abstract: Provided is a communication control device including a radio communication unit configured to perform radio communication with a plurality of terminal apparatuses of a primary system using communication resources of the primary system, and a generating unit configured to generate resource information for notifying a secondary system secondarily using the communication resources of available communication resources. The radio communication unit transmits the resource information generated by the generating unit through a downlink control channel including a common space that is decoded in common by the plurality of terminal apparatuses and a plurality of individual spaces that are decoded by only some of the plurality of terminal apparatuses.Type: GrantFiled: April 16, 2013Date of Patent: December 6, 2016Assignee: Sony CorporationInventor: Hiroaki Takano
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Patent number: 9420096Abstract: A computerized method and related system and software for simplifying telephonic calling, comprising: designating a default destination area code; the user specifying a destination telephone number; and as a default, causing the call to be signaled using the designated default destination area code in combination with the specified destination telephone number, without the user entering the designated default destination area code when specifying the destination telephone number.Type: GrantFiled: September 10, 2015Date of Patent: August 16, 2016Inventor: Gilbert J. Yablon
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Patent number: 9294325Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, an encoder for encoding signaling data, a frame builder for building at least one signal frame including the encoded service data, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.Type: GrantFiled: September 24, 2014Date of Patent: March 22, 2016Assignee: LG ELECTRONICS INC.Inventors: Jongwoong Shin, Jinwoo Kim, Woosuk Ko, Jaeho Hwang, Sungryong Hong
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Patent number: 9094776Abstract: A method for progressively scanning channels first checks whether all channel scanning tasks are completed so as to determine a channel that will be scanned first. During the scanning process, the method records a channel as a last scanned channel after completing a channel scanning task for the channel. In addition, the method scans a channel with a valid service set identifier to increase the possibility of detecting hidden access points.Type: GrantFiled: July 23, 2009Date of Patent: July 28, 2015Assignee: MEDIATEK INC.Inventor: Sung Chien Tang
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Patent number: 9026126Abstract: Various embodiments relate to using available spectrum for peer to peer communications and for selecting which of several possibly available channels should be used. Various methods and apparatus are well suited to peer to peer networks in which channel usage decisions are made in a decentralized manner. A wireless terminal generates a list of potential available channels to be used for peer to peer communications, e.g., based on FCC information and/or local sensing. Channels are filled in accordance with a predetermined channel ordering. A wireless terminal migrates between the channels in accordance with changes in the number of peer devices using a channel. The network, in a distributed manner, changes the number of channels in use at a location in response to changes in numbers of active peer devices at a location.Type: GrantFiled: June 20, 2013Date of Patent: May 5, 2015Assignee: QUALCOMM IncorporatedInventors: Junyi Li, Saurabha Rangrao Tavildar, Aleksandar Jovicic, Hongseok Kim
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Patent number: 8995925Abstract: Methods, apparatus and articles of manufacture for performing inter-frequency measurements in a mobile network are disclosed. Example methods disclosed herein include a mobile station receiving, from a network, one or more lists specifying a set of frequencies for which measurements are to be performed. Such example methods also include the mobile station varying a rate at which the measurements are to be performed for a first frequency of the set of frequencies based on a number of frequencies for which the measurements are to be performed.Type: GrantFiled: April 25, 2014Date of Patent: March 31, 2015Assignee: BlackBerry LimitedInventor: Ozgur Ekici
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Patent number: 8970376Abstract: Methods, systems, and articles of manufacture for assigning priority to antennae are disclosed. In accordance with a preferred embodiment of the invention, reader antennae identify the location of an object by detecting a tag or other identifier associated with each object. Sensors can be provided to provide additional information regarding the environment of the objects or their surroundings. A priority order is assigned to the reader antennae based on the location and other characteristics of the objects and/or their environment. A polling sequence for reading the reader antennae is determined according to the priority order.Type: GrantFiled: March 5, 2012Date of Patent: March 3, 2015Assignee: Tyco Fire & Security GmbHInventors: Paul B. Rasband, Donald G. Bauer, Richard J. Campero
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Patent number: 8787468Abstract: A method for multi-radio coexistence receives historical frequency usage information and historical time usage information from a first radio. The method creates a time and frequency mask by extrapolating the historical frequency and time usage information to future times and frequencies when the first radio will be active and uses the time and frequency mask to schedule a second radio to avoid receiving when the first radio will likely be active. A related apparatus has a collocated radio input for receiving timing usage information, a non-collocated radio input for receiving frequency usage information, and a time and frequency mask generator for creating a time and frequency mask using the timing usage information and the frequency usage information. The method and apparatus predicts collocated and non-collocated radio activity in both the time and frequency dimensions to reduce interference among radios operating in overlapping or adjacent frequency bands.Type: GrantFiled: June 19, 2009Date of Patent: July 22, 2014Assignee: Motorola Mobility LLCInventors: Phan Dao Minh Truong, Michael E Russell, Indranil S. Sen
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Patent number: 8731477Abstract: Methods, apparatus and articles of manufacture for performing inter-frequency measurements in a mobile network are disclosed. An example method in a mobile station disclosed herein comprises receiving, from a network, a list specifying a set of frequencies for which measurements are to be performed, and if the set of frequencies exceeds a monitoring capability of the mobile station, prioritizing measurement of a subset of frequencies from the set of frequencies based on information separate from the list obtained from the network.Type: GrantFiled: October 26, 2011Date of Patent: May 20, 2014Assignee: BlackBerry LimitedInventor: Ozgur Ekici
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Patent number: 8699967Abstract: A method for uplink transmit diversity enhancement is disclosed. A subset of two or more potential uplink transmission configurations are determined. A subset of potential uplink transmission configurations is evaluated. An uplink transmission configuration is selected based on the evaluation. Metrics of the selected uplink transmission configuration are determined. The selected uplink transmission configuration is applied for an extended use period.Type: GrantFiled: August 27, 2010Date of Patent: April 15, 2014Assignee: QUALCOMM IncorporatedInventor: Jason Frank Hunzinger
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Patent number: 8615236Abstract: Techniques to dynamically manage wireless connections using feature prioritization are described. For example, a mobile computing device may comprise a connection management module operative to access a list of one or more wireless networks, compare feature set information for the one or more wireless networks, select a wireless network based on the comparison, and initiate a wireless connection using the selected wireless network, wherein the feature set information is contained in the list. Other embodiments are described and claimed.Type: GrantFiled: June 4, 2010Date of Patent: December 24, 2013Assignee: Palm, Inc.Inventors: Anand Kashikar, Wen Zhao
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Patent number: 8526987Abstract: Contention for a resource in a multi-resource system is resolved by separately resolving contention for each resource. In some cases where two or more entities contending for a resource are associated with equal priorities, lexicographic ordering is used to resolve contention between these entities. In some cases where two or more entities contending for a resource are associated with equal priorities, a random probability-based scheme is used to resolve contention between these entities. Also, different types of schemes may be used to resolve contention for different resources.Type: GrantFiled: January 20, 2009Date of Patent: September 3, 2013Assignee: QUALCOMM IncorporatedInventors: Rajarshi Gupta, Anastasios Stamoulis
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Patent number: 8494540Abstract: Various embodiments relate to using available spectrum for peer to peer communications and for selecting which of several possibly available channels should be used. Various methods and apparatus are well suited to peer to peer networks in which channel usage decisions are made in a decentralized manner. A wireless terminal generates a list of potential available channels to be used for peer to peer communications, e.g., based on FCC information and/or local sensing. Channels are filled in accordance with a predetermined channel ordering. A wireless terminal migrates between the channels in accordance with changes in the number of peer devices using a channel. The network, in a distributed manner, changes the number of channels in use at a location in response to changes in numbers of active peer devices at a location.Type: GrantFiled: April 8, 2010Date of Patent: July 23, 2013Assignee: QUALCOMM IncorporatedInventors: Junyi Li, Saurabh Tavildar, Aleksandar Jovicic, Hongseok Kim
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Patent number: 8447252Abstract: An approach and apparatus for adaptive scanning for detection and classification of an RF signal. Time-domain and frequency-domain information are acquired and processed over a broad band of frequencies segmented into channels to produce signal features. The signal features are classified using a signal classifier into signal discriminants, from which a signal of interest is located and identified. Subsequent channel scans then place an increased relative or absolute dwell time on the channel believed to contain the signal of interest.Type: GrantFiled: January 21, 2009Date of Patent: May 21, 2013Assignee: Bandspeed, Inc.Inventors: Nils Bagge, Ben Jones
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Patent number: 8428613Abstract: A wireless communication system comprises a mobile station and a base station, which use a plurality of communication channels and a pilot channel corresponding to at least one of the communication channels. The base station has a transmitting unit that employs at least one of the communication channels as a priority channel and transmits channel information of this priority channel and the other channels by use of a communication channel other than the pilot channel. The mobile station has a determining unit that determines a reception level of the pilot channel; an acquiring unit that acquires the channel information transmitted via the communication channel other than the pilot channel; and a deciding unit that decides, as an available communication channel, at least one of the communication channels based on both the channel information acquired by the acquiring unit and the reception level determined by the determining unit.Type: GrantFiled: January 16, 2009Date of Patent: April 23, 2013Assignee: Fujitsu LimitedInventors: Yoshiharu Tajima, Kazuo Kawabata, Yoshiaki Ohta, Kazuhisa Obuchi, Hideto Furukawa
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Patent number: 8396499Abstract: A method of measuring a state of a plurality of channels is provided. The method includes transmitting to a second device test signal information needed to transmit/receive a test signal for measuring the state of the plurality of channels; receiving an information received response from the second device, indicating that the second device has received the test signal; if the information received response is received, transmitting the test signal to the second device, using the test signal information, via the plurality of channels; and receiving from the second device the state information regarding the plurality of channels which has been measured by using the test signal.Type: GrantFiled: May 16, 2011Date of Patent: March 12, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Dae-yong Sim, Ho-seok Lee
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Patent number: 8396473Abstract: A method and system for scanning channels in a network for incoming audio transmissions. A device enters an intelligent scanning mode, which initiates an automatic scanning of predefined channels for incoming audio transmissions. Upon detection, the device tunes to the channel of the incoming audio transmission while continually searching channels of a higher priority for incoming audio transmissions of a higher priority. A device enters a single channel mode to send an outgoing transmission, which automatically reverts the device to the channel of the last incoming audio transmission.Type: GrantFiled: March 16, 2007Date of Patent: March 12, 2013Assignee: Symbol Technologies, Inc.Inventors: Gary Binowski, Edwin Booth, John H. Du Hart, IV, Michael Faith, Michael N. Hagans, Edward Moskaluk, Stephen F. Paulus, Kelly Schlueter
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Patent number: 8374603Abstract: A method for adaptive conventional scanning in a two-way radio transceiver (300) includes initiating an unweighted scan behavior (301) from a scanning list and then determining if qualified activity is present on a scanned channel (303) for a predetermined number of scan cycles. Once qualified activity is detected, the scanned channel is then marked (307) as having high activity. The transceiver then switches (309) to a weighted scan behavior such that the marked channel will be checked at a higher periodic rate than an unmarked channel. Once qualified activity is detected on the marked channel for a predetermined number of cycles (311) the channel is unmarked (315) and the weighted nature of the scan is removed such that normal scanning activity is resumed (317). The marking process increases the overall scanning rate enhancing the overall performance of the scan for all channels.Type: GrantFiled: April 28, 2006Date of Patent: February 12, 2013Assignee: Motorola Solutions, Inc.Inventors: David E. Klein, Andrew J. Janecek
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Patent number: 8351885Abstract: A Radio Frequency Receiver on a Single Integrated Circuit (“RFSIC”) is described. The RFSIC may include a mixer, a phase-locked loop (“PLL”) in signal communication with the mixer, and an on-chip auto-tuned RF filter in signal communication with both the mixer and PPL, such that the same PLL simultaneously tunes the frequency of the VCO and the frequency response of the auto-tuned RF filter.Type: GrantFiled: October 28, 2011Date of Patent: January 8, 2013Assignee: CSR Technology Inc.Inventors: Noshir Dubash, Jeffrey E. Koeller, Daniel Babitch
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Patent number: 8351948Abstract: A method for customizable flow management in a cellular basestation including configuring a framework on a cellular basestation; and executing customized flow management functions through the framework by an external entity.Type: GrantFiled: March 1, 2011Date of Patent: January 8, 2013Assignee: NEC Laboratories America, Inc.Inventors: Ravindranath Kokku, Rajesh Mahindra, Honghai Zhang, Sampath Rangarajan
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Patent number: 8311499Abstract: A sound system with a radio receiver having the ability to automatically tune to a new radio station if (a) the current radio station is broadcasting a song, program or other content that the user dislikes and/or (b) one of one or more predetermined radio stations is broadcasting content that the listener likes. In one embodiment, the sound system includes a tuner for tuning to a frequency of a radio station and for converting a radio signal transmitted by the radio station to an audio signal; a memory unit for storing a first set of templates, wherein the first set of templates correspond to a to a set of songs, programs, commercials, or other content disliked by the user of the sound system; and a recognition processor, coupled to the tuner and to the memory unit, for receiving the audio signal, generating templates from the audio signal, and comparing the generated templates to at least one of the templates within the first set of templates.Type: GrantFiled: April 24, 2009Date of Patent: November 13, 2012Assignee: Garbsen Enterprises, LLCInventor: Thomas M. Eubanks
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Patent number: 8300792Abstract: An active call between two parties can be established as a call having priority over other users in a tiered priority system. Changes to the level of priority are permitted if made by an authorized user in attendance on the active call. The change of call priority can be to either raise or lower the priority based on call circumstances. If approved, the new active call priority level is propagated to other nodes and switches so that system knowledge of the new priority level is consistent. The new priority level is reset to the pre-established call priority level after the active call is completed.Type: GrantFiled: May 14, 2008Date of Patent: October 30, 2012Assignee: AT&T Mobility II LLCInventors: DeWayne Allan Sennett, Brian Kevin Daly
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Patent number: 8219030Abstract: Systems and methodologies are described that facilitate employing distributed frequency planning and reuse factor optimization based upon forward link and/or reverse link interference management techniques. An optimal reuse factor for a base station can be determined based upon a metric that evaluates levels of service associated with neighboring base stations. Moreover, a subset of available resource sets can be selected for use by the base station; thus, a base station specific collection of resource sets can be formed through such selection. Further, mappings of each resource set to a set of physical resources can be disseminated in a network or portion thereof. According to another example, frequency hopping can be constrained to use of resources within a resource set (rather than across more than one resource set) as provided in a base station specific hopping pattern.Type: GrantFiled: June 19, 2008Date of Patent: July 10, 2012Assignee: QUALCOMM IncorporatedInventors: Alexei Gorokhov, Avneesh Agrawal, Naga Bhushan, Tingfang Ji
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Patent number: 8170548Abstract: A user equipment terminal for selecting a standby cell based on a specified priority of cell selection includes a determining unit configured to receive a signal transmitted from a base station apparatus and determine whether priority information of cell selection is included in the signal; and a cell selecting unit configured to perform, based on the determination result by the determining unit, cell selection with a same priority for each cell, when the priority information is not included.Type: GrantFiled: August 15, 2008Date of Patent: May 1, 2012Assignee: NTT DoCoMo, Inc.Inventors: Mikio Iwamura, Minami Ishii
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Patent number: 8165546Abstract: Radio station presets lists can be communicated between a portable media device and an accessory. A radio station presets list can include a listing of radio stations associated with a particular location. The portable media device can determine a current location, select a presets list for the current location (or create a new presets list for the location), and communicate the presets list to the accessory. The portable media device can, periodically or upon request from the accessory, update its location and send a new presets list, if available, to the accessory. After the portable media device and the accessory are disconnected, the accessory can resume using its own presets list.Type: GrantFiled: May 5, 2009Date of Patent: April 24, 2012Assignee: Apple Inc.Inventors: Michael Ingrassia, Jeffery T. Lee, Brent Schorsch
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Mobile link selection method for establishing highly efficient communications between mobile devices
Patent number: 8160586Abstract: The present invention provides a new solution to reliable communication between automobiles and other communications devices. It relies on multiple available wireless bands and the addition of significant memory buffering to automobiles. The memory buffering is used to enable a new communications model for messages that is referred to as Mobile Message Memory Queues (M3Qs). A significant benefit of the communication device is the ease in which it can be incorporated into an automobile.Type: GrantFiled: July 24, 2002Date of Patent: April 17, 2012Assignee: Perdiso Co. Limited Liability CompanyInventors: Frederick S. M. Herz, Jonathan M. Smith -
Patent number: 8145215Abstract: A system and method are disclosed to achieve improvements in scanning that can be implemented by a wireless device. A method to control scanning performed by a mobile unit includes detecting the presence or absence of audio for transmission from the mobile unit. A performance of a scan can be deferred depending on the detection of the presence or absence of audio.Type: GrantFiled: December 27, 2007Date of Patent: March 27, 2012Assignee: ShoreTel, Inc.Inventor: Timothy S. Olson
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Patent number: 8121567Abstract: A method and system for a double search algorithm of user group selection for multiuser MIMO downlink transmission are provided. The use of optimal brute-force user group selection may require high computational expense. A first search operation may be based on a first user having a channel gain greater than that of other users, while a second search operation may be based on a second user having a channel gain greater than that of the remaining users. A maximized system capacity may be determined based on the maximized system capacities determined in the first and second search loop. A receiver pair associated with the maximized system capacity may be selected as the user group. The double search algorithm may reduce the computational complexity while achieving performances that may exceed the TDMA scheme and be similar to that of systems with ideal CSI at the transmitter.Type: GrantFiled: March 1, 2011Date of Patent: February 21, 2012Assignee: Broadcom CorporationInventors: Jun Zheng, Chengjin Zhang, Severine Catreux-Erceg, Vinko Erceg, Pieter Roux, Pieter van Rooyen
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Patent number: 8111675Abstract: A channel search method for a vertical handoff in a wireless network environment is provided, the channel search method including: collecting channel information from a first terminal which is provided with a wireless local area network (WLAN) service via a channel connection with a WLAN node; and determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information. A channel search system for a vertical handoff in a wireless network environment is also provided, the channel search system including: a channel information collection unit for collecting channel information from a first terminal which is provided with a WLAN service via a channel connection with a WLAN node and a search order determination unit for determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information.Type: GrantFiled: April 27, 2007Date of Patent: February 7, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jae Hoon Kim, Ji Hoon Lee
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Patent number: 8086198Abstract: A broadcasting receiver suitable for receiving a broadcasting signal transmitted in an IBOC signal format, comprises: a channel seek directing means for directing to start a channel seeking operation that selects selectable channel in an order of frequency; a channel seek controlling means for starting and controlling the channel seeking operation in accordance with the direction of the channel seek directing means; and a multichannel determining means for determining whether a selected frequency channel is providing multichannel digital broadcasting or not; and wherein the channel seek controlling means selects a next subchannel in an order of identification code before searching for the next frequency channel, if it is determined by the multichannel determining means that the selected frequency channel is providing the multichannel digital broadcasting.Type: GrantFiled: August 30, 2007Date of Patent: December 27, 2011Assignee: Clarion Co., Ltd.Inventors: Kazuo Koyama, Masanori Ishida, Kazuyoshi Inako, Naoki Nakajima
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Patent number: 8081973Abstract: A communication device locates a preferable wireless service provider in a multi-service provider environment using a frequency or frequency band search schedule. Initially, the communication device registers with a less preferred service provider in a first frequency. While remaining registered with the less preferred service provider, the device examines several frequencies in the order specified by the frequency search schedule. The device determines whether the last frequency used by the communication device has a more preferred service provider. If the last frequency used does not have a more preferred service provider, the device examines each of the plurality of frequencies in the predetermined order in the search schedule. The examination continues until another frequency band having a more preferred service provider is located. The communication device then registers with the more preferred service provider.Type: GrantFiled: March 18, 2008Date of Patent: December 20, 2011Assignee: AT&T Mobility II LLCInventors: Michael D. Bamburak, John J. Daly, Christopher Gregory Lawrence, Michael Edward Prise, Michael Allen Raffel
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Patent number: 8078187Abstract: A wireless communication system including a wireless relay station storing a priority table in which identifiers of the communications that are relayed with higher priority are registered, a wireless relay device relaying communications specified by the communication identifiers registered in the priority table with higher priority than other communications, a stream server receiving communication start requests from any of the wireless terminals and sends to the wireless relay station communication identifiers specifying the communications that are about to be started, and requests registration in the priority table, and a wireless relay station registering the communication identifiers whose registration has been requested in the priority table, such that a proportion S/U of a sum S of consumption bandwidths of the communications specified by communication identifiers registered in the priority table to the available bandwidth U of the wireless network does not exceed a predetermined upper limit.Type: GrantFiled: February 5, 2008Date of Patent: December 13, 2011Assignee: Fujitsu LimitedInventors: Ryuichi Matsukura, Hitoshi Yamauchi
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Patent number: 8036612Abstract: A method, apparatus and system for Digital Multimedia Broadcasting (DMB) service are provided. A DMB receiving terminal identifies a channel service area in which the DMB receiving terminal is currently located based on an identified current location, and configures a channel information list by searching only a frequency band corresponding to the channel service area. When the channel service area is changed, the DMB receiving terminal searches a pre-stored connection channel list, and identifies a predetermined channel established as a transition channel corresponding to a channel which the DMB receiving terminal has received, from channels belonging to the changed channel service area. The DMB receiving terminal then receives the identified channel and provides terrestrial DMB service, thereby reducing a channel search time period and smoothly providing the terrestrial DMB service.Type: GrantFiled: August 6, 2007Date of Patent: October 11, 2011Assignee: Samsung Electronics Co., LtdInventor: Dong-Jun Kum
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Patent number: 8019299Abstract: One embodiment includes a system configured to identify a preferred channel for radio communication from a plurality of consecutive integer frequencies including preferred channels and non-preferred channels, the system further to generate a plurality of radio channels corresponding to a plurality of consecutive integer frequencies based on a generation of reference frequencies, identifies preferred channels and non-preferred channels from the plurality of radio channels, where frequency synthesizer settling times of the preferred channels are faster than frequency synthesizer settling times of the non-preferred channels, scan the preferred channels for radio activity, select one of preferred channels responsive to the scanned radio activity; and utilize one of the reference frequencies to generate a radio frequency corresponding to the selected one of the preferred channels.Type: GrantFiled: June 15, 2005Date of Patent: September 13, 2011Assignee: Cypress Semiconductor CorporationInventors: Nathan Moyal, David G. Wright
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Patent number: 7953381Abstract: A radio receiving apparatus for a vehicle includes a radio receiver, a control circuit, a storage device, a manual switch. The radio receiver receives a radio broadcast signal at a predetermined reception frequency. The control circuit records sound information contained in the received broadcast signal on the storage device and plays back the recorded sound information from a predetermined playback position. The manual switch is used to manually change the reception frequency. The control circuit automatically changes the reception frequency when a predetermined condition is met. The control circuit determines whether the reception frequency is changed manually or automatically. When the reception frequency is manually changed, the control circuit sets the playback position to a position corresponding to when the change of the reception frequency is completed.Type: GrantFiled: November 27, 2007Date of Patent: May 31, 2011Assignee: Denso CorporationInventor: Kensuke Suzuki
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Patent number: 7917100Abstract: Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiple-input multiple-output (MIMO) system, based on reducing a search range within which to find a group of signals having maximum channel gain. At least one of: a first signal for a first user and a second signal for a second user may be selected, which are both within the reduced search range, and which provides a maximum system capacity. The first signal for the first user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.Type: GrantFiled: September 21, 2005Date of Patent: March 29, 2011Assignee: Broadcom CorporationInventors: Jun Zheng, Chengjin Zhang, Pieter van Rooyen
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Patent number: 7917101Abstract: Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiuser multiple-input multiple-output (MIMO) downlink system, based on a single signal for a single user within a reduced search range or the single signal for the single user and at least one other signal for one other user within a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The single signal for the single user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range.Type: GrantFiled: September 21, 2005Date of Patent: March 29, 2011Assignee: Broadcom CorporationInventors: Chengjin Zhang, Jun Zheng, Pieter van Rooyen
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Patent number: 7899421Abstract: A method and system for a double search algorithm of user group selection for multiuser MIMO downlink transmission are provided. The use of optimal brute-force user group selection may require high computational expense. A first search operation may be based on a first user having a channel gain greater than that of other users, while a second search operation may be based on a second user having a channel gain greater than that of the remaining users. A maximized system capacity may be determined based on the maximized system capacities determined in the first and second search loop. A receiver pair associated with the maximized system capacity may be selected as the user group. The double search algorithm may reduce the computational complexity while achieving performances that may exceed the TDMA scheme and be similar to that of systems with ideal CSI at the transmitter.Type: GrantFiled: September 21, 2005Date of Patent: March 1, 2011Assignee: Broadcom CorporationInventors: Jun Zheng, Chengjin Zhang, Severine Catreux-Erceg, Vinko Erceg, Pieter Roux, Pieter Van Rooyen
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Patent number: 7894817Abstract: In a wireless communications system operating according to CDMA or the like, when one terminal simultaneously performs communication using multiple wireless resources (e.g., multiple carriers), there was a problem that when it was attempted to guarantee network mobility by the same soft handoff system as in the case where communication was performed using only one wireless resource, efficiency suffered from the viewpoint of network forwarding load, processing load and wireless resource occupancy time. Soft handoff termination is judged and soft handoff is forcibly terminated according to whether or not the data rate obtained for all resources on the network side satisfies a requested rate, based on a reception state notification from a terminal concerning wireless resources.Type: GrantFiled: July 3, 2007Date of Patent: February 22, 2011Assignee: Hitachi, Ltd.Inventors: May Takada, Yosuke Takahashi, Shiro Mazawa, Rintaro Katayama
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Patent number: 7864729Abstract: Devices, systems, and methods for creating, procuring, and maintaining a priority scheme for cell broadcast messages. In an exemplary embodiment, the priority scheme includes a plurality of cell broadcast channels (CBCH) that are assigned logic groups, which in turn are assigned a priority level. Accordingly, cell broadcast (CB) messages with higher priority levels are displayed first on the receiving device.Type: GrantFiled: November 16, 2009Date of Patent: January 4, 2011Assignee: AT&T Mobility II LLCInventors: Ming Zhang, Jun Shen
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Patent number: 7864744Abstract: Disclosed is a method of dynamical frequency selecting for a basic service set established by a main wireless device in a wireless local area network. The method comprises steps of a determining step for determining whether a new channel to be used by said BSS is needed; a scanning step conducted by said main wireless device for scanning all channels based on a random priority to detect whether other adjacent BSSs are existing and performing DFS concurrently; a measuring step conducted by said main wireless device based on the scanning result for existing operational BSSs for measuring channel quality of a plurality of channels; selecting one channel based on the channel quality parameters. The present invention advantageously provides a dynamic frequency selection method without any modification for the IEEE 802.11 standard, or any requirement for the implementation of the wireless stations.Type: GrantFiled: December 20, 2006Date of Patent: January 4, 2011Assignee: Thomson LicensingInventors: Jian Ping Song, Junbiao Zhang, Ming Li
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Patent number: 7865156Abstract: One illustrative method of scanning a radio frequency (RF) band (e.g. 850 MHz band) for valid RF carrier signals of a wireless communication network (e.g. a GSM network) includes the steps of monitoring an RF channel to receive a candidate RF carrier signal; identifying whether the candidate RF carrier signal is a valid RF carrier signal of the wireless communication network by estimating a bandwidth of the candidate RF carrier signal and, if the estimated bandwidth is different from a predetermined bandwidth associated with valid RF carrier signals of the wireless communication network, identifying that the candidate RF signal is not a valid RF carrier signal of the wireless communication network; and repeating the acts of monitoring and identifying for a next RF channel of a plurality of RF channels associated with the wireless communication network. Preferably, the RF bandwidth estimation is performed together with a system signal detection process (e.g. FCCH detection).Type: GrantFiled: April 28, 2006Date of Patent: January 4, 2011Assignee: Research In Motion LimitedInventors: Sean B. Simmons, Huan Wu, Zoltan Kemenczy
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Patent number: 7855963Abstract: According to one embodiment of the invention, a method for controlling capacity of a wired or wireless network with varying bandwidth capacity is described. First, dynamic conditions associated with the data flow are measured. These dynamic conditions influence a bandwidth capacity for the data flow. Next, the capacity is estimated in order to adjust the data flow based on the estimated capacity per the measured dynamic conditions.Type: GrantFiled: December 21, 2006Date of Patent: December 21, 2010Assignee: Aruba Networks, Inc.Inventors: Subbu Ponnuswamy, Partha Narasimhan
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Patent number: 7826844Abstract: A mobile station includes processing circuitry and a memory storing a preferred roaming list and system priority data. The processing circuitry is adapted to detect a communications event for a currently selected wireless communications system and update an entry in the system priority data to reflect the occurrence of the detected communications event. The use of stored statistical information improves the efficiency of the system selection and acquisition process. In operation, a group of wireless communications systems is selected from the preferred roaming list in accordance with a predetermined system acquisition procedure. The group is reprioritized using the priority data and the mobile station attempts to select the wireless communications system having the highest priority in the reprioritized group. The reprioritization may include sorting the group using the priority data and removing systems from the group that do not meet certain priority criteria.Type: GrantFiled: March 6, 2002Date of Patent: November 2, 2010Assignee: QUALCOMM IncorporatedInventor: Rotem Cooper
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Publication number: 20100097935Abstract: To perform a channel inspection, a wireless communication device: monitors a common announcement channel (CACH) until detecting that a first set of identified parameters associated with a signal on a first channel matches a second set of known parameters for the first channel; performs an inspection on the first channel to determine whether the signal is of interest; and when the signal is not of interest, marks the first channel to prevent another inspection from being performed on the first channel until after the channel mark is removed. The communication device then leaves the first channel and continues to monitor the CACH for a change in the first set of identified parameters or an indication of an idle first channel, wherein the communication device removes the channel mark on the first channel.Type: ApplicationFiled: October 17, 2008Publication date: April 22, 2010Applicant: Motorola, Inc.Inventors: JOHN P. BELMONTE, DIPENDRA M. CHOWDHARY, YUEH CHING CHUNG, HUN WENG KHOO, DAVID G. WIATROWSKI
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Patent number: 7689217Abstract: A radio receiver (300) having a multi-state variable threshold automatic gain control (AGC) for fast channel scanning acquisition includes an amplifier (303) having an automatic gain control (AGC) for controlling the gain of a receiver analog signal. An analog-to-digital converter (ADC) (311) is used for converting the receiving analog signal to a digital signal while a digital signal processor (DSP) (325) operates to process the digital signal. A signal magnitude estimator (315) in an AGC controller (313) provides a signal strength estimate of the received signal. The AGC controller (313) then sets the receiver amplifier (303) for an open-loop AGC operational mode and sets a first threshold for triggering an interrupt service request (ISR). This ISR is provided the DSP (325) and the host processor (327) if a radio frequency (RF) signal is detected above a first threshold during a priority scan of a priority channel to minimize interruptions in audio during priority scan.Type: GrantFiled: March 30, 2007Date of Patent: March 30, 2010Assignee: Motorola, Inc.Inventors: Charles R. Ruelke, William J. Rinderknecht