Patents by Inventor Ren-Jr Chen

Ren-Jr 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).

  • Publication number: 20130051264
    Abstract: Communication methods for aggregation of heterogeneous component carriers and communication devices and wireless communication stations using the same methods are proposed. In one embodiment, the proposed communication method is adapted to a wireless communication station and includes aggregating physical channel resources respectively corresponding to heterogeneous access technologies in a Layer 2 or below the Layer 2 in a protocol stack; and communicating with at least one wireless terminal communication device through the physical channel resources respectively corresponding to the heterogeneous access technologies, wherein the physical channel resources respectively corresponding to heterogeneous access technologies are heterogeneous component carriers. The physical channel resources may be heterogeneous component carriers, such as radio component carrier(s), optical component carrier(s), and/or acoustic component carrier(s).
    Type: Application
    Filed: August 22, 2012
    Publication date: February 28, 2013
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chun-Yen Wang, Chang-Lung Hsiao, Ren-Jr Chen
  • Publication number: 20130003797
    Abstract: According to one exemplary embodiment of a universal modem system, multiple digital signal processors (DSPs) are configured to perform at least one streaming-based task, or at least one block-based task, or both of the tasks. At least one concatenate memory is configured to store data for the at least one streaming-based task At least one concatenate bus connects at least one concatenate memory and the plurality of DSPs serially for performing the at least one streaming-based task. At least one concatenate memory is configured to store the data for the at least one streaming-based task. At least one public bus connects the plurality of DSPs and the at least one shared memory for performing the at least one block-based tasks.
    Type: Application
    Filed: June 12, 2012
    Publication date: January 3, 2013
    Applicant: Industrial Technology Research Institute
    Inventors: Chia-Pin CHEN, Tai-Yuan Cheng, Chang-Lung Hsiao, Ren-Jr Chen
  • Patent number: 8265096
    Abstract: A method of constructing a frame structure for data transmission, the method comprising generating a first section comprising data configured in a first format compatible with a first communication system, generating a second section following the first section, the second section comprising data configured in a second format compatible with a second communication system, wherein the second format is different from the first format, generating at least one non-data section containing information describing an aspect of data in at least one of the first section and the second section, and combining the first section, the second section and the at least one non-data section to form the frame structure.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 11, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Yan-Xiu Zheng, Ren-Jr Chen, Chang-Lung Hsiao, Pang-An Ting
  • Publication number: 20120192026
    Abstract: Methods for data transmission management used in a transmitter are provided. The method comprises the steps of: encoding M uncoded packets into N coded packets with Q-packet error correction capability using concatenated encoding, where M?N, and Q?1; sequentially transmitting a set or all of the N coded packets to the at least one receiver; receiving at least one feedback information from the at least one receiver, wherein the at least one feedback information comprises at least one ACK or NACK information for indicating decoding statuses of the transmitted coded packets, each of the transmitted coded packets having one of the decoding statuses corresponding thereto; and determining whether to perform a retransmission procedure to retransmit a dedicated packet to the at least one receiver according to collected ACK/NACK included in the feedback information.
    Type: Application
    Filed: July 15, 2011
    Publication date: July 26, 2012
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ren-Jr Chen, Hua-Lung Yang, Chien-Min Lee, Chia-Wen Hsieh, Chang-Lung Hsiao
  • Patent number: 8184726
    Abstract: An apparatus for data processing in a multi-channel communication system is provided. The apparatus includes an encoder configured to encode a number of bits for transmission via channels in the multi-channel communication system into coded bits and split the coded bits into a number of first sets of bits at a first ratio, a number of first rate units coupled to the encoder, each of the first rate units being configured to adjust one set of the first sets of bits in size at at least one rate, and a controller configured to assign the first ratio to the encoder and the at least one rate to each of the first rate units based on conditions of the channels.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: May 22, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Chang-Lung Hsiao, Ren-Jr Chen, Chung-Lien Ho, Chien-Min Lee, Wern-Ho Sheen
  • Patent number: 8102932
    Abstract: A method and an apparatus for de-mapping symbols in a Multi-Input Multi-Output (MIMO) system are provided. In the present invention, an estimated channel effect and a plurality of received data symbols are used to estimate a plurality of transmitted data symbols. A plurality of constellation points around an estimated value are selected as the detected values of the transmitted data symbol after the estimated value of one of the transmitted data symbols is calculated. Then, the detected values are used to calculate the detected values of remaining transmitted data symbols separately so as to obtain a plurality of detected value sets. Finally, a best one among the detected value sets is chosen as a result of de-mapping the received symbols. Therefore, only a few detected value sets are calculated and a better detected result is obtained, which possesses low complexity and high performance.
    Type: Grant
    Filed: September 29, 2007
    Date of Patent: January 24, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Po-Lin Chiu, Ren-Jr Chen
  • Publication number: 20110292891
    Abstract: UE-specific search spaces (UE-SS) for a carrier-aggregated communication system are introduced to decrease the number of blind decoding attempts, decrease downlink control information (DCI) blocking probability, and maintain good blind decoding performance. In the proposed control channel allocation method, the control channel searching method and the communication apparatus thereof, the UE-specific search spaces are extended except control channel element (CCE) aggregation level one. Further, a new CCE aggregation level is created in the UE-specific search spaces. The sum of the number of control channel candidates for all aggregation levels is bounded by the maximum number of PDCCH candidates. In addition, uplink MIMO grant command is just allocated in a pre-configured component carrier or a set of pre-configured component carriers, but uplink MIMO grant command is not allocated in the remaining component carriers.
    Type: Application
    Filed: May 24, 2011
    Publication date: December 1, 2011
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Wen Hsieh, Chien-Min Lee, Ren-Jr Chen
  • Patent number: 8036190
    Abstract: A system and method for identifying a resource region including a plurality of symbols, allocating pilot signals to the resource region, identifying pilot-free symbols free of the pilot signals in the plurality of symbols, arranging sacrifice carriers for a first region of a group of symbols in the pilot-free symbols at a first density for a first communication station, and arranging sacrifice carriers for a second region of the group of symbols in the pilot-free symbols at a second density for a second communication station, the first communication station mobile with respect to an access communication station at a first relative speed and the second communication station is mobile with respect to the access communication station at a second relative speed, and wherein the first density of sacrifice carriers is greater than the second density of sacrifice carriers if the first relative speed is greater than the second relative speed.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: October 11, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Chang-Lung Hsiao, Ren-Jr Chen, Wern-Ho Sheen
  • Patent number: 8000415
    Abstract: A method and a device for detecting a synchronization signal with a high identification rate are provided, which are suitable for a wide-area Orthogonal Frequency Division Multiplexing (OFDM) system. The method and device can precisely detect information of a synchronization signal, without being interfered by transmission channels and noises in an external environment. Three sliding windows are used to obtaining a balance value as an offset value for the output signal of the method and the device. A peak position of the output signal is identified and then compensated for a delay caused by the length of one of the sliding windows. Such a position is an edge of the synchronization signal.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: August 16, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Chien-Min Lee, Ren-Jr Chen
  • Publication number: 20110194630
    Abstract: A mobile communications device is provided with a wireless module and a controller module. The wireless module receives a plurality of downlink signals from a service node and determines a plurality of status indicators respectively corresponding to the downlink signals. The controller module determines whether a radio link failure has occurred according to the status indicators, and transmits at least one uplink signal via the wireless module to indicate information of the radio link failure to the service node in response to the occurrence of the radio link failure.
    Type: Application
    Filed: December 17, 2010
    Publication date: August 11, 2011
    Inventors: Hua-Lung YANG, Ren-Jr CHEN, Chien-Min LEE, Chun-Chia CHEN
  • Patent number: 7974358
    Abstract: An orthogonal frequency division multiplexing (OFDM) system provided for communication includes an OFDM transmitter and an OFDM receiver. The OFDM transmitter may be configured to transmit OFDM signals through a communication channel and may include a channel encoder configured to encode a plurality of information bits and an interleaver configured to interleave the channel-encoded information bits. The OFDM transmitter may also include a mapper configured to map the interleaved channel-encoded information bits into mapped multi-level symbols. The OFDM transmitter may also include a dispersive encoder that is configured to dispersively encode the mapped symbols. The OFDM receiver may be configured to receive the transmitted OFDM signals and to decode the received OFDM signals iteratively based on soft decision methods.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: July 5, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Chang-Lan Tsai, Chang-Lung Hsiao, Ren-Jr Chen, Char-Dir Chung
  • Publication number: 20110033011
    Abstract: A method of providing a multi-resolution transmission with a MIMO scheme may include employing a selected modulation scheme to generate a first data stream including basic information and a second data stream including both enhanced information and the basic information, and employing a modulation and multiple input/multiple output (MIMO) scheme to generate data for transmission. The data for transmission may employ a combination of spatial multiplexing and transmit diversity techniques. A corresponding apparatus is also provided. Another method of providing selective recovery of received data at a mobile terminal may include receiving data at a mobile terminal including at least one antenna, receiving information indicative of a data reception condition at the mobile terminal, determining, between spatial multiplexing and transmit diversity mode options, a reception mode to be employed for decoding the data received based on the information indicative of the data reception condition.
    Type: Application
    Filed: June 17, 2010
    Publication date: February 10, 2011
    Inventors: Ren-Jr Chen, Chang-Lung Hsiao
  • Publication number: 20100329200
    Abstract: An apparatus is provided for allocating uplink resources in a system in which downlink component carrier bands are aggregated and uplink component carrier bands are aggregated. The apparatus includes a processor configured to perform or cause the apparatus to perform a number of functions. The functions include receiving an assignment or an indication of an assignment of one or more resource indices to the apparatus. Additional resource indices for the apparatus may be derived as a function of an assigned resource index. The assigned resource indices and/or additional resource indices may be pre-assigned to respective pairs of downlink and uplink component carrier bands, or may be mapped to uplink component carriers. The apparatus may then be enabled to transmit or may prepare for transmission uplink control signals in an uplink component carrier band in accordance with an allocation of uplink resources specified by one of the resource indices.
    Type: Application
    Filed: May 17, 2010
    Publication date: December 30, 2010
    Inventors: Ren-Jr Chen, Chien-Min Lee, Hua-Lung Yang
  • Publication number: 20100265904
    Abstract: A method of providing interference avoidance in uplink CoMP may include generating an orthogonal frequency division multiplexing (OFDM) symbol for uplink transmission to coordinated multi-point (CoMP) cells, and providing a cyclic-prefix and a cyclic-postfix for the OFDM symbol generated to reduce uplink interference without backhaul transmission for delay or timing advance information. A corresponding apparatus and computer program product are also provided. An alternative method of providing interference avoidance in uplink CoMP may include measuring timing differences between downlink signals received at a mobile terminal in connection with coordinated multi-point (CoMP) transmission from a serving cell and one or more coordinating cells and adjusting uplink transmission timing for signals to be transmitted from the mobile terminal based on the timing differences measured. A corresponding apparatus and computer program product are also provided.
    Type: Application
    Filed: April 19, 2010
    Publication date: October 21, 2010
    Inventors: Hua-Lung Yang, Ren-Jr Chen, Ming-Bing Chen, Chien-Min Lee, Hao-Wen Chen
  • Publication number: 20100239032
    Abstract: A method for a first user terminal to receive data from a second user terminal, wherein the first and second user terminals communicate with a transmitting terminal. The method includes: transmitting a first message to the transmitting terminal; receiving a signal from the transmitting terminal, the received signal including information regarding the first message and a second message transmitted from the second user terminal to the transmitting terminal; and decoding, based on the first message, the received signal to receive the second message.
    Type: Application
    Filed: August 12, 2009
    Publication date: September 23, 2010
    Inventors: Ren-Jr CHEN, Chia-Wen HSIEH, Chang-Lung HSIAO
  • Publication number: 20100177694
    Abstract: A method for a user equipment to transmit uplink control information to a base station, the base station being configured to receive uplink control information on a plurality of groups of subcarriers. The method includes: randomly determining one of the groups of subcarriers; and transmitting uplink control information on the randomly determined group of subcarriers.
    Type: Application
    Filed: November 6, 2009
    Publication date: July 15, 2010
    Inventors: Hua-Lung YANG, Chien-Min Lee, Ren-Jr Chen
  • Publication number: 20100067425
    Abstract: A method for subblock generation in a wireless communication system includes receiving, by a subblock generator, one or more data blocks, and selecting, based on one or more criteria, one or more functional blocks and an operational order of the one or more functional blocks. The method also includes processing the received one or more data blocks using the selected one or more functional blocks in the selected operational order to generate a plurality of data subblocks, and transmitting the plurality of data subblocks to the plurality of receiving devices. The method further includes transmitting, to the plurality of receiving devices, location information for each of the plurality of data subblocks.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 18, 2010
    Inventors: Ren-Jr CHEN, Yu-Chuan FANG
  • Publication number: 20090323838
    Abstract: A method used in a wireless communication apparatus based on reference signals is provided. The method may include obtaining a plurality of pilot rules and obtaining radio channel information of a radio channel between the wireless communication apparatus and another wireless communication apparatus. The wireless communication apparatus may be in an area including at least one cell and using one or more data streams. Further, the method may include selecting applicable pilot rules from the plurality of pilot rules based on the radio channel information, creating at least one pilot structure to be used in the radio channel; and using the created at least one pilot structure to transmit data over the radio channel.
    Type: Application
    Filed: March 18, 2009
    Publication date: December 31, 2009
    Inventors: Chung-Lien HO, Ren-Jr Chen, Yan-Xiu Zheng
  • Publication number: 20090276671
    Abstract: A method of error control, including forming a plurality of first data symbols from a plurality of data bits, transmitting a first signal including the plurality of first data symbols, receiving a request for retransmission, forming a plurality of second data symbols from the plurality of data bits, and transmitting a second signal including the plurality of second data symbols. At least one of the first data symbols is formed from several of the plurality of data bits such that none of the second data symbols is formed from the several of the plurality of data bits.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 5, 2009
    Inventors: Yu-Chuan FANG, Ren-Jr CHEN
  • Publication number: 20090147900
    Abstract: A method and a device for detecting a synchronization signal with a high identification rate are provided, which are suitable for a wide-area Orthogonal Frequency Division Multiplexing (OFDM) system. The method and device can precisely detect information of a synchronization signal, without being interfered by transmission channels and noises in an external environment. Three sliding windows are used to obtaining a balance value as an offset value for the output signal of the method and the device. A peak position of the output signal is identified and then compensated for a delay caused by the length of one of the sliding windows. Such a position is an edge of the synchronization signal.
    Type: Application
    Filed: May 15, 2008
    Publication date: June 11, 2009
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chien-Min Lee, Ren-Jr Chen