Patents by Inventor Jiangnan Chen

Jiangnan Chen 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).

  • Patent number: 9642067
    Abstract: The present invention provides a network offloading method, a base station, and a terminal, which solves the problem of low user experience of a terminal. Specific steps may include: receiving access point state information of a wireless local area network; and if it is determined, according to stored state information of a network currently accessed by a terminal, that data offloading needs to be performed for the terminal, and it is determined, according to the access point state information, that the terminal is allowed to access the wireless local area network, sending offloading instruction information to the terminal, where the offloading instruction information includes identification information of the wireless local area network, so that the terminal makes the terminal access the wireless local area network according to the identification information of the wireless local area network, and performs data transmission using the wireless local area network.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: May 2, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Hai Liu, Jiangnan Chen, Xinyou Ma, Qiming Liu
  • Publication number: 20150043516
    Abstract: The present invention provides a network offloading method, a base station, and a terminal, which solves the problem of low user experience of a terminal. Specific steps may include: receiving access point state information of a wireless local area network; and if it is determined, according to stored state information of a network currently accessed by a terminal, that data offloading needs to be performed for the terminal, and it is determined, according to the access point state information, that the terminal is allowed to access the wireless local area network, sending offloading instruction information to the terminal, where the offloading instruction information includes identification information of the wireless local area network, so that the terminal makes the terminal access the wireless local area network according to the identification information of the wireless local area network, and performs data transmission using the wireless local area network.
    Type: Application
    Filed: October 28, 2014
    Publication date: February 12, 2015
    Inventors: Hai LIU, Jiangnan CHEN, Xinyou MA, Qiming LIU
  • Patent number: 8116244
    Abstract: A method and apparatus includes a scheduling entity (308) for scheduling and transmitting the superframe (402) across a communication network (200). The controller (310) coupled with scheduling entity (308) groups the subscriber unit (304) into one of the plurality of groups. The scheduler entity (308) assigns a coding scheme for each group and encodes each frame of the superframe (402) based upon the assigned coding scheme for the group, to which the frame is to be transmitted. The transceiver (316) coupled with controller (310) via hardware interface (314) receives the encoded superframe and transmits the superframe to the plurality of subscriber units in the communication network (200).
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: February 14, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Gregory M. Agami, Jiangnan Chen, Kadathur S. Natarajan
  • Publication number: 20070253379
    Abstract: Various embodiments are described to address the need for a method and apparatus that could reduce the start-up delay for uplink data transfers in multiple-access technologies. A time-symbol threshold (551) is introduced for an uplink frame (550) in order to create a partition of the frame that includes the earlier of the available time symbols and in which any bandwidth request allocations may be placed. By placing bandwidth request allocations earlier in the uplink frame (i.e., at or before the time-symbol threshold), remote units are able to send their bandwidth requests to a scheduler sooner and thereby receive a bandwidth grant for an uplink data transfer with less delay.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Inventors: Prachi Kumar, Jiangnan Chen
  • Patent number: 7272364
    Abstract: A wireless system, which minimizes nulls within the wireless system, while simultaneously providing diversity. A wireless system will now have increased capacity and coverage due to an enhanced signal to interference ratio in the areas of beam overlap. The system uses time or frequency offset on the signals input to an antenna to minimize interference in the regions of beam overlap. Additionally, polarization diversity can be introduced using Butler Matrices in conjunction with array elements to enhance the interference reduction.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: September 18, 2007
    Assignee: Motorola, Inc.
    Inventors: Colin Frank, Yuda Luz, Jason Jiangnan Chen, John Touvannas
  • Publication number: 20060280159
    Abstract: The present invention is a method and apparatus for voice communication. Vocoded frames are transmitted using a transmission intervals. Each transmission interval is split into a first interval portion and a second interval portion. Code symbols associated with each vocoded frame are divided into a group A and a group B. The method includes transmitting group A code symbols of a first vocoded frame using a first interval portion of an interval i; decoding the group A code symbols received at the first interval portion of the interval i; performing an error detection code check on the first interval portion of the interval i; generating and sending a negative acknowledgment signal when the first interval portion of the interval i fails the error detection code check; and transmitting group B code symbols of the first vocoded frame using a second interval portion of an interval i+N.
    Type: Application
    Filed: June 10, 2005
    Publication date: December 14, 2006
    Inventors: Hao Bi, Ron Rotstein, John Harris, Fan Wang, Jiangnan Chen
  • Publication number: 20060146750
    Abstract: In the present technique of data transmission management provided, a composite status indicator value is assessed (716) based on multiple channel quality indicator reports over a predefined time. The assessed composite status indicator value is compared (718) to a first threshold value. If the assessed composite status indicator value does not correspond in at least a predetermined way to the first threshold value, the mobile station is classified (720) in a high speed data region. Otherwise, the assessed composite status indicator value is further compared (726) to a second threshold, and if it corresponds in at least a predetermined way to the second threshold, the mobile station is classified (734) in the low speed data region.
    Type: Application
    Filed: December 30, 2004
    Publication date: July 6, 2006
    Inventors: Jiangnan Chen, Yuda Luz
  • Patent number: 7046719
    Abstract: A receiver (200) is provided receiving signals from differing base stations (BTSA and BTSB). The signal from BTSA is encoded using a first rate convolutional encoder while the signal transmitted from BTSB is encoded using a second rate convolutional encoder. Since the multiple base station links may result in a different number of symbols being received for each bit transmitted, the symbols received for each link cannot be simply combined. Therefore, in the preferred embodiment of the present invention, the resulting symbols are passed to multiple branch metric circuits (210–211), where branch metrics (?i) for the symbols are obtained. After the ith branch metrics for the base stations are computed, the branch metrics for each base station are passed to a combiner (212) where they are combined.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: May 16, 2006
    Assignee: Motorola, Inc.
    Inventors: Jiangnan Chen, Ron Rotstein, Yuda Luz, Louay A Jalloul
  • Patent number: 6854077
    Abstract: A communication system 100 employs turbo encoding having a turbo interleaver 106 that interleaves input data 101 efficiently with little use of system resources. The turbo interleaver 106 reads address locations of the data bits into an interleaver matrix array 206 row by row and interleaves the address locations by bit reversal of the row indexes with accompanying permutation of the corresponding address locations in the rows of the matrix 206, bit reversal of the column indexes with accompanying permutation of the corresponding address locations in the columns of the matrix 206 and shifting the address locations within each row a predetermined number of column locations based on the particular row number.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: February 8, 2005
    Assignee: Motorola, Inc.
    Inventors: Jiangnan Chen, Louay Jalloul
  • Publication number: 20040170142
    Abstract: A method and apparatus for long code generation in synchronous, multi-chip rate systems, wherein a first code sequence having a first bit rate, and a second code sequence having the first bit rate, the second code sequence being a time delay of the first code sequence, are multiplexed together, producing a desired long code.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 2, 2004
    Inventors: Kevin Michael Laird, Jiangnan Chen, Frank Fei Zhou
  • Publication number: 20040157609
    Abstract: A method and apparatus provide for soft handoff operation of at least a first signal transmitted according to a first communication standard (IS-95B) and a second signal transmitted according to a second communication standard (IS-95C).
    Type: Application
    Filed: February 4, 2004
    Publication date: August 12, 2004
    Inventors: Louay Jalloul, Keith A. Tenbrook, Yuda Yehuda Luz, Jiangnan Chen, Ron Rotstein
  • Publication number: 20040127174
    Abstract: A wireless system, which minimizes nulls within the wireless system, while simultaneously providing diversity. A wireless system will now have increased capacity and coverage due to an enhanced signal to interference ratio in the areas of beam overlap. The system uses time or frequency offset on the signals input to an antenna to minimize interference in the regions of beam overlap. Additionally, polarization diversity can be introduced using Butler Matrices in conjunction with array elements to enhance the interference reduction.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Applicant: MOTOROLA, INC.
    Inventors: Colin Frank, Yuda Luz, Jason Jiangnan Chen, John Touvannas
  • Patent number: 6724778
    Abstract: A method and apparatus for long code generation in synchronous, multi-chip rate systems, wherein a first code sequence having a first bit rate, and a second code sequence having the first bit rate, the second code sequence being a time delay of the first code sequence, are multiplexed together, producing a desired long code.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: April 20, 2004
    Assignee: Motorola, Inc.
    Inventors: Kevin Michael Laird, Jiangnan Chen, Frank Fei Zhou
  • Publication number: 20030087640
    Abstract: A method and apparatus for reuse of pseudo-random noise (PN) offsets within a cell of a wireless communication system such as a multi-sector CDMA system. Adaptive antenna arrays are employed to form the multiple sector areas within the CDMA cell. A forward link data channel is established between a mobile unit and a base station via sectors that share or reuse comment PN offsets, thereby providing desirable transmit diversity.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 8, 2003
    Inventors: Ron Rotstein, Yuda Yehuda Luz, Robert T. Love, Dennis Ray Schaeffer, Jiangnan Chen, Colin Frank
  • Publication number: 20020154682
    Abstract: A receiver (200) is provided receiving signals from differing base stations (BTSA and BTSB). The signal from BTSA is encoded using a first rate convolutional encoder while the signal transmitted from BTSB is encoded using a second rate convolutional encoder. Since the multiple base station links may result in a different number of symbols being received for each bit transmitted, the symbols received for each link cannot be simply combined. Therefore, in the preferred embodiment of the present invention, the resulting symbols are passed to multiple branch metric circuits (210-211), where branch metrics (&mgr;i) for the symbols are obtained. After the ith branch metrics for the base stations are computed, the branch metrics for each base station are passed to a combiner (212) where they are combined.
    Type: Application
    Filed: March 8, 2001
    Publication date: October 24, 2002
    Applicant: MOTOROLA, INC.
    Inventors: Jiangnan Chen, Ron Rotstein, Yuda Luz, Louay A. Jalloul
  • Publication number: 20020035709
    Abstract: A communication system 100 employs turbo encoding having a turbo interleaver 106 that interleaves input data 101 efficiently with little use of system resources. The turbo interleaver 106 reads address locations of the data bits into an interleaver matrix array 206 row by row and interleaves the address locations by bit reversal of the row indexes with accompanying permutation of the corresponding address locations in the rows of the matrix 206, bit reversal of the column indexes with accompanying permutation of the corresponding address locations in the columns of the matrix 206 and shifting the address locations within each row a predetermined number of column locations based on the particular row number.
    Type: Application
    Filed: February 2, 2001
    Publication date: March 21, 2002
    Applicant: MOTOROLA, INC.
    Inventors: Jiangnan Chen, Louay Jalloul
  • Patent number: 6304581
    Abstract: A communication system provides a method and apparatus for interleaving data symbols of a block of data symbols (301) having data symbols from B(1) to B(n). The method and the accompanying apparatus include dividing block of data symbols (301) into a plurality of groups of data symbols (303 and 304). Each of the plurality of groups of data symbols (303, 304) includes data symbols equal in number to a fraction of data symbols B(1) through B(n), such as ½ and ⅓, such that the total number of data symbols in plurality of groups of data symbols (303, 304) substantially equals “n” data symbols. An interleaved block of data symbols (106) is formed by an alternating selection of data symbols from plurality groups of data symbols (303, 304). The alternating selection from each of plurality of groups of data symbols (303, 304) is according to either a forward addressing or a backward addressing mapping.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: October 16, 2001
    Assignee: Motorola, Inc.
    Inventors: Jiangnan Chen, Louay Jalloul
  • Patent number: 6246676
    Abstract: Method and apparatus to provide a pseudo random noise (PN) sequence having a particular code phase offset for use in a radio in a Code Division Multiple Access (CDMA) radio system (100). In one embodiment, a first mask (320) is applied to shift a reference PN sequence to the assigned PN code phase (416). Upon reaching the end of the reference PN sequence, the initial state is reloaded (420) into the PN generator state register to reset the state value to its initial value, thereby producing a cyclical sequence. In a second embodiment, a first mask (622) and a second mask (624) are applied to the reference sequence produced by the PN generator state registers (620) to produce the appropriate portions of the output sequence.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: June 12, 2001
    Assignee: Motorola, Inc.
    Inventors: Jiangnan Chen, Yuda Y. Luz, Ron Rotstein
  • Patent number: 5881058
    Abstract: The method, which operates in a code division multiple access wireless communication system including a base site having a first and second antenna for receiving communication signals from a mobile unit and a base site receiver for demodulating the communications, includes receiving at a first antenna a first set of signals of the communication signals; processing, by a searcher, the first set of signals to produce an output indicative of a winning correlation energy and an associated pn-offset for at least one of the first set of signals; receiving at a second antenna a second set of signals of the communication signals; and using the output to coordinate demodulation of the at least one of the first set of signals of the communication signals, as a function of its pn-offset, while simultaneously processing, by the searcher, the second set of signals.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: March 9, 1999
    Assignee: Motorola, Inc.
    Inventor: Jiangnan Chen