Patents by Inventor Yanjun Sun

Yanjun Sun 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: 8761147
    Abstract: A wireless device comprises a first wireless transceiver, a second wireless transceiver, and control logic. The control logic is coupled to the first wireless transceiver and the second wireless transceiver. The control logic is configured to determine whether to transmit protection frames (e.g., clear-to-send 2 self frames) based upon sequence numbers in frames received from another device.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: June 24, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Ramanuja Vedantham, Josef Peery, Assaf Sella, Xiaolin Lu
  • Publication number: 20140146808
    Abstract: Apparatus, systems, and methods disclosed herein operate to provide wireless communication between personal mobile communication (PMC) devices. An emulated wireless access point (AP) at a first PMC device (PMC1) establishes a first tunneled direct link setup (TDLS) session between a first station module (STA1) incorporated into the PMC1 and a second station module (STA2) incorporated into a second PMC device (PMC2). Following establishment of the TDLS session, the wireless AP is allowed to sleep; and most infrastructure management duties are handled by the STA1 during the session. PMC device battery charge may be conserved as a result. The emulated wireless AP may also establish a second TDLS link to a third station module (STA3) incorporated into a third PMC device (PMC3). The STA1 may then bridge data traffic flow between the STA2 and the STA3. Such bridging operation may enable communication between two PMC devices otherwise unable to decode data received from the other.
    Type: Application
    Filed: February 4, 2014
    Publication date: May 29, 2014
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Leonardo William Estevez, Ariton Xhafa, Ramanuja Vedantham, Yanjun Sun
  • Patent number: 8717923
    Abstract: A system and method for reducing power consumption of a wireless device operating as a soft access point. In one embodiment, a wireless device includes a soft access point controller that configures the wireless device to operate as a group owner in a peer-to-peer wireless local area network. The soft access point controller includes a beacon controller. The beacon controller is configured to transmit beacon frames at a first periodic interval. The beacon controller is also configured to extend a discovery interval of a wireless station by transmitting acknowledgement packets at a second periodic interval. The second periodic interval is shorter than the first periodic interval and shorter than a minimum discovery scan timeout of the wireless station.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 6, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Ramanuja Vedantham, Xiaolin Lu, Assaf Sella, Josef Peery, Ariton Xhafa, Yanjun Sun
  • Patent number: 8675529
    Abstract: Apparatus, systems, and methods disclosed herein operate to provide wireless communication between personal mobile communication (PMC) devices. An emulated wireless access point (AP) at a first PMC device (PMC1) establishes a first tunneled direct link setup (TDLS) session between a first station module (STA1) incorporated into the PMC1 and a second station module (STA2) incorporated into a second PMC device (PMC2). Following establishment of the TDLS session, the wireless AP is allowed to sleep; and most infrastructure management duties are handled by the STA1 during the session. PMC device battery charge may be conserved as a result. The emulated wireless AP may also establish a second TDLS link to a third station module (STA3) incorporated into a third PMC device (PMC3). The STA1 may then bridge data traffic flow between the STA2 and the STA3. Such bridging operation may enable communication between two PMC devices otherwise unable to decode data received from the other.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: March 18, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Leonardo William Estevez, Ariton Xhafa, Ramanuja Vedantham, Yanjun Sun
  • Patent number: 8670362
    Abstract: Apparatus and method for improving throughput in a wireless device accessing coexisting networks. In one embodiment, a wireless device includes first and second wireless transceivers, a power state controller, and an access controller. The first wireless transceiver is configured to access a first wireless network. The second wireless transceiver is configured to access a second wireless network. The power state controller is configured to switch the first wireless transceiver between an active state and a sleep state. The power consumed by the first wireless transceiver while in the sleep state is reduced relative to the active state. The access controller is configured to alternately allocate a wireless medium to the first wireless transceiver and the second wireless transceiver. The power state controller and the medium access controller are configured to coordinate power state switching of the first wireless transceiver and wireless medium access by the second wireless transceiver.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: March 11, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 8644269
    Abstract: A network includes an access point using a first protocol and a station using both the first protocol and a second protocol. The station uses the first protocol before a first threshold and a second protocol after the first threshold. A first duration between the second threshold and the first threshold is at least of sufficient length for the station to receive one data packet from the access point and send an acknowledgment. The station transmits to the access point a current clear-to-send packet at a current time during a current exchange based on success or failure of a previous exchange during which a previous clear-to-send packet was transmitted to the access point at a previous time.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: February 4, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu, Josef Peery
  • Publication number: 20140023058
    Abstract: A network includes an access point using a first protocol and a station using both the first protocol and a second protocol. The station uses the first protocol before a first threshold and a second protocol after the first threshold. A first duration between the second threshold and the first threshold is at least of sufficient length for the station to receive one data packet from the access point and send an acknowledgment. The station transmits to the access point a current clear-to-send packet at a current time during a current exchange based on success or failure of a previous exchange during which a previous clear-to-send packet was transmitted to the access point at a previous time.
    Type: Application
    Filed: September 26, 2013
    Publication date: January 23, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu, Josef Peery
  • Publication number: 20140016625
    Abstract: A system and method for arbitrating channel access in a wireless device including co-located network transceivers are disclosed herein. A wireless device includes a first wireless transceiver and a second wireless transceiver. The first transceiver is configured for operation with a first wireless network. The second transceiver is configured for operation with a second wireless network. The wireless device further includes logic that determines which of the first and second transceivers is enabled to transmit at a given time. The logic causes the first transceiver to transmit a notification signal indicating a time period during which the second transceiver of the wireless device will perform a first wireless transaction, and during which, based on receiving the notification signal, a different wireless device performs a second wireless transaction via the second wireless network without transmitting a notification signal.
    Type: Application
    Filed: September 17, 2013
    Publication date: January 16, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu, Josef Peery
  • Patent number: 8625510
    Abstract: A wireless device includes a first wireless transceiver and a second wireless transceiver. The first wireless transceiver is configured to communicate via a first wireless network, and includes a first scheduler configured to schedule communication via the first wireless network. The second wireless transceiver is configured to communicate via a second wireless network. The second wireless transceiver includes a second scheduler. The second scheduler is configured to identify a resource allocated to the second wireless transceiver for a transaction via the second wireless network, to identify a portion of the resource used by the second wireless transceiver for the transaction, and to transfer information defining the portion to the first transceiver.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: January 7, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Josef Peery, Assaf Sella, Xiaolin Lu
  • Patent number: 8588080
    Abstract: A system and method for using reserved resources in coexisting wireless networks. In one embodiment, a wireless apparatus includes a receiver, a network activity monitor, and a network access scheduler. The receiver is configured to identify a received network reservation message that inhibits access to a first wireless network for an interval defined in the reservation message. The network activity monitor is configured to monitor wireless activity on the first wireless network during the interval. The network access scheduler is configured to determine whether the reservation message prevents conflict of the first wireless network with a coexisting wireless network during the interval, and to schedule, based on a determination that the reservation message prevents conflict with the coexisting wireless network, the wireless apparatus to transmit on the first wireless network during the interval to a wireless device other than a wireless device identified in the reservation message.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: November 19, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Publication number: 20130301453
    Abstract: A wireless device that tailors communications based on power parameters of the device. In one embodiment, a wireless device includes an energy source, a power monitor coupled to the energy source, a wireless transceiver, and a traffic controller coupled to the power monitor and the wireless transceiver. The power monitor is configured to measure a parameter of the energy source. The wireless transceiver is configured to wirelessly communicate via a wireless network. The traffic controller is configured to set length of packets to be transmitted based on the measured parameter of the energy source.
    Type: Application
    Filed: May 10, 2013
    Publication date: November 14, 2013
    Applicant: Texas Instruments Incorporated
    Inventors: Ariton E. Xhafa, Soon-Hyeok Choi, Yanjun Sun, Leonardo William Estevez
  • Patent number: 8582550
    Abstract: In accordance with at least some embodiments, a system comprises an access point and a station in communication with the access point. The station has at least two network technology subsystems subject to coexistence interference. The station selectively implements bounded Power Save (PS)-Polling (BPS) logic to handle communications between the station and the access point. The BPS logic operates to confine PS-Poll transmissions starts to one of two separate windows during a medium grant duration of the station.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: November 12, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu
  • Publication number: 20130259016
    Abstract: A wireless device includes a wireless transceiver configured to transmit to and receive from nodes in a wireless sensor network (WSN) and control logic coupled to the first wireless transceiver. The wireless transceiver transmits a wireless packet to a node in the WSN based on the transmission coinciding with a break in transmissions for a second wireless network. Based on the wireless transceiver being configured to transmit the wireless packets utilizing time synchronized channel hopping, slot frames for packet transmissions in the WSN are time offset so as not to coincide with transmissions made on the second wireless network. Based on the wireless transceiver being configured to transmit the packets utilizing coordinated sampled listening, wake up sequence transmissions for the WSN are time offset so as not to coincide with the transmissions made on the second wireless network.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 3, 2013
    Applicant: Texas Instruments Incorporated
    Inventors: Ariton E. Xhafa, Soon-Hyeok Choi, Srinath Hosur, Yanjun Sun
  • Publication number: 20130250928
    Abstract: Various techniques are disclosed for assigning timeslots in a multihop wireless network. One such method includes, for each node for uplink timeslot assignments, assigning a higher hop count node to a timeslot that is to occur before all time slots assigned to lower hop count nodes. The method further includes, for each node for downlink timeslot assignments, assigning a lower hop count node to a timeslot that is to occur before all time slots assigned to higher hop count nodes.
    Type: Application
    Filed: March 22, 2013
    Publication date: September 26, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Soon-Hyeok CHOI, Ariton E. XHAFA, Yanjun SUN
  • Patent number: 8537803
    Abstract: A system and method for arbitrating channel access in a wireless device including co-located network transceivers are disclosed herein. A wireless device includes a first wireless transceiver and a second wireless transceiver. The first transceiver is configured for operation with a first wireless network. The second transceiver is configured for operation with a second wireless network. The wireless device further includes logic that determines which of the first and second transceivers is enabled to transmit at a given time. The logic causes the first transceiver to transmit a notification signal indicating a time period during which the second transceiver of the wireless device will perform a first wireless transaction, and during which, based on receiving the notification signal, a different wireless device performs a second wireless transaction via the second wireless network without transmitting a notification signal.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: September 17, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu, Josef Peery
  • Publication number: 20130188670
    Abstract: An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver, wherein the control logic is configured to receive, from the first transceiver, a first signal, and cause, in response to the first signal, data transmitted by the first transceiver on the first communication medium as part of a communication session to be transmitted instead by the second transceiver on the second communication medium while the first transceiver continues to receive data as part of the communication session.
    Type: Application
    Filed: July 19, 2012
    Publication date: July 25, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yanjun SUN, Gang Xu, Soon-Hyeok Choi, Bhadra Sandeep, Xiaolin Lu, Ariton E. Xhafa, Minghua Fu, Robert Liang, Susan Yim
  • Publication number: 20130188673
    Abstract: An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver and capable of implementing a convergence layer, wherein the control logic is configured to receive, from the first transceiver, a first signal; and cause, in response to the first signal, data received and transmitted by the first transceiver on the first communication medium as part of a communication session to be received and transmitted instead by the second transceiver on the second communication medium.
    Type: Application
    Filed: July 19, 2012
    Publication date: July 25, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yanjun SUN, Gang Xu, Soon-Hyeok Choi, Bhadra Sandeep, Xiaolin Lu, Ariton E. Xhafa, Minghua Fu, Robert W. Liang, Susan Yim
  • Publication number: 20130182686
    Abstract: An integrated circuit includes logic configured to determine a communication schedule of a device configured to perform Wi-Fi communications in a first Basic Service Set (BSS) network and in a second BSS network. The logic determines the communication schedule based at least in part on a first BSS network communication load of the device and on a second BSS network communication load of the device. The communication schedule defines the service time allocation of the device in the first BSS network and the service time allocation of the device in the second BSS network. At least one of the first and the second BSS networks is supportive of a peer-to-peer connection.
    Type: Application
    Filed: July 18, 2012
    Publication date: July 18, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ramanuja VEDANTHAM, Michael GLIK, Ariton E. XHAFA, Yanjun SUN
  • Patent number: 8477703
    Abstract: A wireless device comprises a first wireless transceiver configured for communication via a first wireless network, a second wireless transceiver configured for communication via a second wireless network; and a scheduler that controls which of the first and second transceivers is granted access to a wireless medium at a given time. When the first wireless transceiver has been granted access to the wireless medium by the scheduler and the first wireless transceiver receives a packet via the first wireless network, the scheduler temporarily grants the second wireless transceiver access to the wireless medium based on the packet indicating that first wireless transceiver is not to use the wireless medium for a period of time.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: July 2, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Yanjun Sun, Ariton E. Xhafa, Xiaolin Lu, Assaf Sella
  • Patent number: 8458504
    Abstract: A device includes a peer-to-peer group owner processor. The device also includes a memory coupled to the peer-to-peer group owner processor. At least one client associated with the device is a legacy client, and the peer-to-peer group owner processor enters a listening state after a dozing state. The device consumes less power in the listening state than in an awake state.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: June 4, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Shantanu Kangude, Ariton E. Xhafa, Yanjun Sun, Harshal S. Chhaya