Patents by Inventor Sam Shiaw-Shiang Jiang

Sam Shiaw-Shiang Jiang 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: 20070265875
    Abstract: A method for setting ciphering activation time in a user equipment of a wireless communications system includes receiving a first RRC (radio resource control) message for activating a first ciphering key, setting an activation time of a first SRB (signaling radio bearer) as a predefined number plus a first SN (sequence number) of a last PDU (protocol data unit) of a sequence of PDUs that carry a second RRC message utilized for indicating completion of activating the first ciphering key, transmitting the second RRC message on the first SRB, prohibiting the transmission of RRC messages using the first ciphering key on the first SRB, and allowing the transmission of RRC messages on the first SRB when the successful delivery of the second RRC message has been confirmed.
    Type: Application
    Filed: May 9, 2007
    Publication date: November 15, 2007
    Inventors: Sam Shiaw-Shiang Jiang, Richard Lee-Chee Kuo
  • Publication number: 20070258400
    Abstract: A method for setting default values of timers in a wireless communications system includes setting default values of timers Timer_RST and Timer_Poll to be a first value. The timers Timer_RST and Timer_Poll are used to respectively hold retransmission of a reset signaling packet and a polling until an expected response is received.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 8, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070258489
    Abstract: A method of handling a variable of a Radio Link Control reset procedure during receiver-side-only re-establishment in a wireless communications system includes resetting a reset state variable, used for counting the number of times a RESET protocol data unit is scheduled to be transmitted, during receiver-side-only re-establishment.
    Type: Application
    Filed: May 2, 2007
    Publication date: November 8, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070253447
    Abstract: A method for handling segmentation and numbering of protocol data units (PDUs) in a radio link control (RLC) entity of a wireless communications system includes handling a plurality of service data units (SDUs), an SDU of the plurality of SDUs comprising at least a first sequence number (SN) field and a first data field, a PDU of the RLC entity comprising a second data field storing all or segmented data of the first data field, the PDU further comprising a second SN field at least storing a value of the first SN field, and the RLC entity using the second SN field for performing an automatic repeat request, duplicate detection, a sequence number check, in-sequence delivery, etc.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 1, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070253401
    Abstract: A method of deciphering parameter synchronization in a reception end of a wireless communications system includes setting a receiving window of a first entity as a Push Type window with a window size greater than or equal to a window size of a receiving window of a second entity when the second entity operates in an acknowledged mode.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 1, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070250637
    Abstract: A jitter reducing method in a receiver of a selective combining system includes determining a slowest cell corresponding to the receiver in the selective combining system, treating a plurality of missing packets as being received when a data stream transmitted by the slowest cell is detected to comprise the plurality of missing packets and a sequence number of a first packet in the plurality of missing packets is a sequence number of a next packet that is expected to be received in sequence, and delivering a received packet following the plurality of missing packets in sequence to an upper layer.
    Type: Application
    Filed: May 24, 2006
    Publication date: October 25, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Patent number: 7284179
    Abstract: Instead of using a fixed size window, the invention will calculate the window size based on the receiver's capacities and configured system parameters. Moreover, this invention modifies operations regarding how to shift the transmission window at the transmitter and the receiving window at the receiver and how to deliver the received data blocks in-sequence by the receiver, so that it fixes problems of the prior art.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: October 16, 2007
    Assignee: Innovative Sonic Limited
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070230398
    Abstract: A method for handling uplink transmission start used in a mobile of a wireless communications system includes when an uplink transmission is started, if a predefined information element (IE) is not received, setting a primary state variable to “none” to indicate that a Serving Grant (SG) value can be affected by a Secondary Absolute Grant message.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 4, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070223405
    Abstract: A method for activating a first Hybrid Automatic Repeat Request (HARQ) process used in a mobile of a wireless communications system includes receiving a first Primary Absolute Grant (AG) message indicating to activate the first HARQ process, and only activating the first HARQ process and de-activating all HARQ processes other than the first HARQ process.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 27, 2007
    Inventors: Sam Shiaw-Shiang Jiang, Li-Chih Tseng
  • Publication number: 20070223526
    Abstract: A method for handling retransmissions used in a transmitter of a wireless communications system includes initiating a Hybrid Automatic Repeat Request process, transmitting a packet with a first sequence number, and transmitting the packet with a second sequence number and marking the packet as a new packet when a transmission number of the packet with the first sequence number reaches a configured maximum number of transmissions.
    Type: Application
    Filed: March 22, 2007
    Publication date: September 27, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070218907
    Abstract: A method for handling de-activation of a first Hybrid Automatic Repeat Request (HARQ) process used in a mobile of a wireless communications system includes receiving a Primary Absolute Grant (AG) message indicating to de-activate the first HARQ process, de-activating the first HARQ process, and activating all HARQ processes and using a grant provided by a Secondary AG message as a serving grant if all the HARQ processes are de-activated and a secondary grant function is configured.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 20, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070211663
    Abstract: A method of triggering transmission of Scheduling Information (SI) used in a user end (UE) of a wireless communications system includes executing a hybrid automatic repeat request (HARQ) process to transmit a packet containing scheduling information, and triggering transmission of a new SI when the number of transmissions of the packet containing SI is greater than or equal to a predetermined maximum number of transmissions, and the UE has not received an acknowledgement message corresponding to the packet containing SI.
    Type: Application
    Filed: March 7, 2007
    Publication date: September 13, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Patent number: 7254143
    Abstract: This invention provides solutions to resolve the potential security unsynchronizing problem when upper layers issue a suspend command to the RLC entity while a TFC selection exchange process has been initialised. Three solutions of this invention, can be used either in UM or in AM environment, in which the RLC entity defines a safe range factor and add it to the upper-layers-passed parameter N of the prior art to calculate a new suspend sequence number for the suspended RLC entity. During the suspension, the RLC entity will continuously pass the scheduled RLC PDUs to lower layers as long as the SN of scheduled RLC PDU is less than the new suspend sequence number. One solution of this invention is more suitable to be implemented in UM than in AM. In this solution, upper layers decide and pass to the RLC entity a suitable parameter N having a more tolerant safety range than the prior art does.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: August 7, 2007
    Assignee: Innovative Sonic Limited
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20070104109
    Abstract: A method for radio link control error handling procedure in a wireless communications system including a first communication device and a second communication device includes a first radio link control entity of the first communication device only resetting a transmitting side of the first radio link control entity when a protocol error of the transmitting side is detected.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 10, 2007
    Inventor: Sam Shiaw-Shiang Jiang
  • Patent number: 7203196
    Abstract: The invention provides a data discard signalling procedure in a wireless communication system. If data is discarded by the transmitter, the transmitter needs to notify the receiver of the discard. A shortened move receiving window super-field is used to request the receiver to move its reception window and optionally to indicate the set of discarded RLC SDUs, as a result of an RLC SDU discard in the sender. A move receiving window acknowledgement super-field acknowledges the reception of a MRW SUFI. If various criteria are met, the SDU discard with explicit signalling procedure can be efficiently terminated resulting in increased transmission throughput. Utilizing the data discard signalling procedure of the present invention, transmission throughput is increased and the transmission performance is improved.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: April 10, 2007
    Assignee: Asustek Computer Inc.
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20060245410
    Abstract: A method for polling transmission status in a wireless communications system includes determining whether a buffer of a transmitter contains at least a packet that has been transmitted, has not been discarded, and has not yet been acknowledged when there is no packet scheduled for transmission or retransmission while a polling procedure is triggered and is not prohibited, selecting a packet in order to transmit a poll, and scheduling the selected packet for retransmission.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 2, 2006
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20060245430
    Abstract: A method for reconfiguring receiving window size of a receiving end of a communication system in a transmitting end of the communication system includes receiving a status report unit from the receiving end and updating an acknowledge state variable and a maximum send state variable according to the status report unit. Positively acknowledged packets with sequence numbers greater than the acknowledge state variable are retained in a buffer of the transmitting end. Positively acknowledged packets with sequence numbers greater than the acknowledge state variable are marked by the transmitter end as positively acknowledged packets. The maximum send state variable is updated according to a command for reconfiguring receiving window size of the communication system. Positively acknowledged packets with sequence numbers greater than or equal to the maximum send state variable are marked as not yet acknowledged packets.
    Type: Application
    Filed: April 21, 2006
    Publication date: November 2, 2006
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20060221853
    Abstract: A method for detecting an erroneous sequence number in a status report in a wireless communications system includes receiving a status report sent from a receiver of the wireless communications system, detecting whether a negatively acknowledged sequence number is within a range that is larger than or equal to the sequence number following the sequence number of the last in-sequence acknowledged packet and smaller than the sequence number of the next packet to be transmitted for the first time, and detecting that the status report includes an erroneous sequence number when a negatively acknowledged sequence number is not within the abovementioned range.
    Type: Application
    Filed: April 4, 2006
    Publication date: October 5, 2006
    Inventor: Sam Shiaw-Shiang Jiang
  • Publication number: 20060221833
    Abstract: A method for reconfiguring size of a receiving window in a communications system avoiding duplicate packet delivery to an upper layer to keep ciphering parameters in synchronization when the communications system reconfigures a receiving window of a receiver includes receiving a command for reconfiguring a size of the receiving window, reconfiguring the size of the receiving window according to the command, removing packets with sequence numbers outside the receiving window from buffers of the receiver and delivering the packets to the upper layer, determining whether a sequence number of a next expected packet is below the receiving window, and keeping the sequence number of the next expected packet and the packets in a reordering buffer of the receiver unchanged when the sequence number of the next expected packet is not below the receiving window.
    Type: Application
    Filed: April 4, 2006
    Publication date: October 5, 2006
    Inventor: Sam Shiaw-Shiang Jiang
  • Patent number: 7116667
    Abstract: A wireless communications protocol utilizes protocol data units (PDUs) for transmitting and receiving service data units (SDUs). Each PDU has a sequence number of n bits for indicating a relative sequential ordering of the PDU in a transmitted or received stream of PDUs. A transmission time interval (TTI) is also used in which a predetermined number of PDUs are transmitted or received. PDUs are received within a TTI. A starting sequence number and an ending sequence number for received PDUs within the TTI are found. Any received PDU within the TTI that has a sequence number that is sequentially before the starting sequence number or that is sequentially after the ending sequence number is discarded. The incremental magnitude of the sequence numbers is used to signal discarded PDUs.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: October 3, 2006
    Assignee: ASUSTeK Computer Inc.
    Inventors: Sam Shiaw-Shiang Jiang, Alex Chung-Ming Sun