Patents by Inventor Dexu Lin
Dexu Lin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8416736Abstract: Techniques for managing candidate sets for a user equipment (UE) are described. In an aspect, multiple candidate sets of cells of different classes may be maintained for the UE. Each candidate set may include cells of a particular class. As some examples, the multiple candidate sets may be for cells of different transmit power levels, cells of different association types, cells associated with different resources, etc. The multiple candidate sets may be maintained separately based on applicable criteria and rules. The multiple candidate sets may be used to select a serving cell for the UE and/or for other communication purposes for the UE. In another aspect, one or more candidate sets may be maintained for the UE and may be used for multiple communication purposes for the UE. The multiple communication purposes may include server selection, interference management, measurement reporting, etc.Type: GrantFiled: July 7, 2009Date of Patent: April 9, 2013Assignee: QUALCOMM IncorporatedInventors: Tingfang Ji, Anastasios Stamoulis, Dexu Lin
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Publication number: 20130044654Abstract: The described aspects include methods and apparatus for aggregating carriers over a backhaul link between a relay and an evolved Node B (eNB). A first set of subframes of at least a first carrier of a plurality of carriers configured for communicating with an eNB over a backhaul link can be determined. A second set of subframes of at least a second carrier of the plurality of carriers configured for backhaul link communications is also determined, wherein the second set of subframes are different from the first set of subframes. Data received over a plurality of access link carriers can then be communicated to the eNB over the first carrier and the second carrier based at least on the first set of subframes and the second set of subframes.Type: ApplicationFiled: August 9, 2012Publication date: February 21, 2013Applicant: QUALCOMM INCORPORATEDInventors: Wanshi Chen, Dexu Lin, Jelena M. Damnjanovic, Juan Montojo
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Publication number: 20120307765Abstract: Providing for fair resource sharing among wireless nodes in a wireless communication environment is described herein. By way of example, fairness can comprise establishing a set of resource sharing credits for wireless nodes. By expending credits, a node can borrow a resource of another node, to enable or enhance operation of the borrowing node. Credits for the borrowing node are decreased based on consumption of a shared resource, or credits for the lending node are increased based on such consumption, or both. Once an amount of credits expires, a node can be restricted from borrowing further resources until enough resources are lent to build up a suitable amount of credits. Accordingly, fairness can comprise correlating shared resource consumption with shared resource provisioning, to encourage participation in cooperative wireless communications.Type: ApplicationFiled: August 11, 2012Publication date: December 6, 2012Applicant: QUALCOMM INCORPORATEDInventors: Arnab Chakrabarti, Anastasios Stamoulis, Dexu Lin, Kambiz Azarian Yazdi, Tingfang Ji
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Publication number: 20120289248Abstract: Various systems and methods for network management are disclosed. In one embodiment, a network management system comprises a receiver for receiving data from a plurality of entities, including base stations and/or subscriber handsets, a processor for generating a network map or a recommendation based on the received data, a display device for displaying the network map or recommendation, and a transmitter for transmitting instructions based on the recommendation.Type: ApplicationFiled: June 19, 2012Publication date: November 15, 2012Applicant: QUALCOMM INCORPORATEDInventors: Anastasios Stamoulis, Arnab Chakrabarti, Dexu Lin, Kambiz Azarian Yazdi, Tingfang Ji
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Publication number: 20120290720Abstract: Various systems and methods for network management are disclosed. In one embodiment, a network management system comprises a receiver for receiving data from a plurality of entities, including base stations and/or subscriber handsets, a processor for generating a network map or a recommendation based on the received data, a display device for displaying the network map or recommendation, and a transmitter for transmitting instructions based on the recommendation.Type: ApplicationFiled: June 19, 2012Publication date: November 15, 2012Applicant: QUALCOMM INCORPORATEDInventors: Anastasios Stamoulis, Arnab Chakrabarti, Dexu Lin, Kambiz Azarian Yazdi, Tingfang Ji
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Patent number: 8288718Abstract: An ion mobility spectrometer comprises an electrode and two storage electrodes disposed at the two opposite sides of the electrode respectively. Ions from an intermediate part between the two storage electrodes are stored and the stored ions are released from the storage electrodes by changing electric potentials of the two storage electrodes. The present invention further discloses a detecting method using an ion mobility spectrometer.Type: GrantFiled: June 28, 2010Date of Patent: October 16, 2012Assignee: Nuctech Company LimitedInventors: Yuanjing Li, Zhiqiang Chen, Qingjun Zhang, Shiping Cao, Dexu Lin, Shaoji Mao, Qinghua Wang
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Patent number: 8249029Abstract: Techniques for sending low reuse preambles in a wireless network are described. In an aspect, a base station may send a low reuse preamble on reserved frequency resources to allow terminals to detect the base station even in the presence of strong interfering base stations. The base station may generate the low reuse preamble to include a pilot portion and a data portion. The base station may determine frequency resources reserved for sending low reuse preambles by base stations. The base station may then send the low reuse preamble on the reserved frequency resources, e.g., at a pseudo-randomly selected time. A terminal may detect for low reuse preambles sent by the base stations on the reserved frequency resources. The terminal may recover information for a base station from a detected low reuse preamble.Type: GrantFiled: March 24, 2009Date of Patent: August 21, 2012Assignee: Qualcomm IncorporatedInventors: Ravi Palanki, Aamod D. Khandekar, Avneesh Agrawal, Dexu Lin, Yan Zhou
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Patent number: 8217365Abstract: Disclosed is an ion source comprising a plate-shaped source body which has radioactivity on its both sides and allows positive and negative ions to penetrate through the source body. The present invention gives beneficial effects. First, the ion source structure can improve the ionization efficiency of sample molecules, and the generated sample ions have a centralized distribution within a flat space on both sides of the source body. Such distribution of ion cloud facilitates to improve the IMS sensitivity. Meanwhile, the source body of the present invention has a transmittance in itself. Thus, positive and negative ions generated on both sides of the source body can penetrate through the source body and be separated to the both sides of the source body. In this way, it is possible to improve the utilization efficiency of ions.Type: GrantFiled: May 7, 2009Date of Patent: July 10, 2012Assignee: Nuctech Company LimitedInventors: Zhiqiang Chen, Yuanjing Li, Hua Peng, Qingjun Zhang, Jin Lin, Shaoji Mao, Zhude Dai, Shiping Cao, Zhongxia Zhang, Yangtian Zhang, Dexu Lin, Qinghua Wang, Shaofeng Wang, Hui Li
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Publication number: 20120063369Abstract: Methods and apparatuses are provided that include selecting resources for assigning to a device to mitigate relay self-interference when also communicating with a base station. The resources can be selected based on one or more factors, such as based on resources that are negotiated with the base station, or based on resources indicated as not desired for allocation from the base station, etc. In other examples, reference signals and control data can be communicated such as to mitigate relay self-interference as well.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Applicant: QUALCOMM INCORPORATEDInventors: Dexu Lin, Ravi Palanki, Dhananjay Ashok Gore
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Publication number: 20120027054Abstract: Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas.Type: ApplicationFiled: July 29, 2011Publication date: February 2, 2012Applicant: QUALCOMM IncorporatedInventors: Ravi Palanki, Dexu Lin, Kapil Bhattad, Dhananjay Ashok Gore
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Patent number: 8084737Abstract: An array-based ion storage system includes an ion generation section, and an ion storage section having a first end electrode coupled to the ion generation section and having multiple holes, a second end electrode having multiple holes, an intermediate electrode having multiple holes, a first insulator formed as a ring between the first end electrode and the intermediate electrode, and a second insulator formed as a ring between the intermediate electrode and the second end electrode. The ion storage section can be made thinner to facilitate consistency in ion extraction and reduce the spread of an ion mobility spectrum peak. The insulators have a big hole, and the ions cannot bump onto the insulation material during ion vibration or thermal movement in the storage space. Therefore, charge transfer and accumulation at the insulator and the subsequent discharge will not occur, suppressing instability of storage and loss of ions.Type: GrantFiled: December 24, 2008Date of Patent: December 27, 2011Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Yuanjing Li, Zhiqiang Chen, Qingjun Zhang, Hua Peng, Zhude Dai, Shaoji Mao, Dexu Lin
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Publication number: 20110249611Abstract: Techniques for supporting relay communication with subframe staggering are described. For subframe staggering, subframes of different relays are staggered from one another, which can increase the number of potential backhaul subframes. In one design, a first relay determines its access subframes and backhaul subframes, which correspond to different non-overlapping subsets of the subframes of the first relay. The first relay communicates with at least one UE during the access subframes and communicates with a base station during the backhaul subframes. The subframes of the first relay are offset from the subframes of a second relay communicating with the base station. In one design, the access subframes of the first relay includes all subframes with either even or odd indices, which can support data transmission with HARQ. In one design, at least one access subframe corresponds to at least one reserved subframe having reduced transmit power from the base station.Type: ApplicationFiled: October 7, 2010Publication date: October 13, 2011Applicant: QUALCOMM INCORPORATEDInventors: Aamod Dinkar Khandekar, Tingfang Ji, Dexu Lin, Wanshi Chen
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Patent number: 8013297Abstract: Disclosed is an ion gate for a dual IMS and method. The ion gate includes an ion source, a first gate electrode placed on one side of the ion source, a second gate electrode placed on the other side of the ion source, a third gate electrode placed on the side of the first gate electrode away from the ion source, a fourth gate electrode placed on the side of the second gate electrode away from the ion source, wherein during the ion storage, the potential at the position on the tube axis of the ion gate corresponding to the first gate electrode is different from the potentials at the positions on the tube axis corresponding to the ion source and the third gate electrode, and the potential at the position on the tube axis corresponding to the second gate electrode is different from the potentials at the positions on the tube axis corresponding to the ion source and the fourth gate electrode.Type: GrantFiled: October 15, 2009Date of Patent: September 6, 2011Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Hua Peng, Qingjun Zhang, Jin Lin, Yuanjing Li, Zhiqiang Chen, Shaoji Mao, Zhude Dai, Dai Hua, legal representative, Shiping Cao, Zhongxia Zhang, Yangtian Zhang, Dexu Lin, Qinghua Wang
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Publication number: 20110199919Abstract: Methods and apparatuses are provided that facilitate associating with relays in a wireless network. A device can select whether to utilize relay assistance where present based at least in part on measuring one or more determined or projected parameters related to the relay. Where utilizing a relay results in user-plane data channel conditions above a threshold level and control channel conditions below a threshold level, a serving base station can determine whether to employ another base station to serve the device, jointly serve a relay with an additional base station, and/or the like.Type: ApplicationFiled: January 18, 2011Publication date: August 18, 2011Applicant: QUALCOMM IncorporatedInventors: DEXU LIN, TINGFANG JI, WANSHI CHEN, JABER MOHAMMAD BORRAN
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Publication number: 20110194483Abstract: Systems and methodologies are described herein that facilitate techniques for design of relay backhaul to support mobility of relay nodes in a wireless communication system. According to various aspects herein, techniques are provided to enable and support the use of mobile relays and to facilitate handover of mobile relays between respective donor cells. More particularly, techniques are provided herein for relay backhaul control channel assignment associated with hand in or hand out of mobile relays, access/backhaul resource partitioning for mobile relays, and management of quality of service (QoS) requirements associated with a relay handover.Type: ApplicationFiled: August 10, 2010Publication date: August 11, 2011Applicant: QUALCOMM INCORPORATEDInventors: Tingfang Ji, Wanshi Chen, Dexu Lin
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Publication number: 20110194527Abstract: For range expansion, a determination to enter range expansion may be made based on a signal strength differential for user equipment (UE) communications between a first class of base stations and a second class of base stations. If the signal strength differential is beyond a certain threshold, range expansion may be implemented. In range expansion, a signal is transmitted, on a resource coordinated with at least one of the first class of base stations, from one of the second class of base stations to the UE which could experience dominant interference from one of the first class of base stations if coordination were not performed. Transmission power may be reduced from one of the first class of base stations on that resource. The second signal may be transmitted within the region of the Physical Downlink Shared Channel.Type: ApplicationFiled: February 9, 2011Publication date: August 11, 2011Applicant: QUALCOMM INCORPORATEDInventors: Dexu Lin, Ravi Palanki, Wanshi Chen, Aleksandar Damnjanovic, Tingfang Ji, Aamod Dinkar Khandekar
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Publication number: 20110194407Abstract: A system and method of managing adjustment of synchronization timing for handover of a mobile relay is disclosed. The method includes repositioning coverage of the mobile relay from a first network access point to a second network access point and adjusting a synchronization timing of the mobile relay in an asynchronous network of the wireless communication system.Type: ApplicationFiled: August 11, 2010Publication date: August 11, 2011Applicant: QUALCOMM INCORPORATEDInventors: Tingfang Ji, Dexu Lin, Wanshi Chen, Rajat Prakash, Aamod Dinkar Khandekar
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Publication number: 20110194482Abstract: Systems and methodologies are described herein that facilitate techniques for design of relay backhaul to support mobility of relay nodes in a wireless communication system. According to various aspects herein, techniques are provided to enable and support the use of mobile relays and to facilitate handover of mobile relays between respective donor cells. More particularly, techniques are provided herein for relay backhaul control channel assignment associated with hand in or hand out of mobile relays, access/backhaul resource partitioning for mobile relays, and management of quality of service (QoS) requirements associated with a relay handover.Type: ApplicationFiled: August 10, 2010Publication date: August 11, 2011Applicant: QUALCOMM INCORPORATEDInventors: Tingfang Ji, Wanshi Chen, Dexu Lin
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Publication number: 20110133072Abstract: An ion mobility spectrometer comprises an electrode and two storage electrodes disposed at the two opposite sides of the electrode respectively. Ions from an intermediate part between the two storage electrodes are stored and the stored ions are released from the storage electrodes by changing electric potentials of the two storage electrodes. The present invention further discloses a detecting method using an ion mobility spectrometer.Type: ApplicationFiled: June 28, 2010Publication date: June 9, 2011Inventors: Yuanjing Li, Zhiqiang Chen, Qingjun Zhang, Shiping Cao, Dexu Lin
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Publication number: 20110128933Abstract: Aspects are disclosed for operating a relay via an MBSFN-based backhaul link. Control resources are allocated, which include a first set of control resources and a second set of control resources. For some embodiments, a portion of the first set of control resources is concatenated with a portion of the second set of control resources to form a concatenation of resources whereas, in other embodiments, an indication scheme is implemented to provide an indication of a first or second allocation size respectively associated with the first and second set of control resources. At least one control signal is then transmitted which includes at least one of the concatenation or the indication. Other disclosed embodiments are directed towards configuring a user equipment to decode a control signal generated according to the aspects disclosed herein.Type: ApplicationFiled: May 26, 2010Publication date: June 2, 2011Applicant: QUALCOMM INCORPORATEDInventors: Wanshi Chen, Dexu Lin, Tingfang Ji