Patents by Inventor Thanigaivelu ELANGOVAN
Thanigaivelu ELANGOVAN 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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Publication number: 20150092644Abstract: A station that generates data packets to be transmitted by the station such that the data packets spend a minimum amount of time in a buffer prior to transmission. The method includes receiving a specification for a connected discontinuous reception (C-DRX) cycle, the specification indicating when a plurality of onDurations of the C-DRX cycle occurs, the onDurations having a predetermined interval therebetween, receiving data at a known time relative to the C-DRX cycle, determining a modification to a conversion process that converts the data to data packets such that the data packets are stored in a buffer at a subframe immediately preceding one of the onDurations subsequent to the known time, performing the conversion process based upon the modification and storing the data packets at the subframe immediately preceding the one of the onDurations. In one embodiment, the data is raw audio data and the data packets are audio packets.Type: ApplicationFiled: September 26, 2014Publication date: April 2, 2015Inventors: Luciano VERGER, Lalin THEVERAPPERUMA, Muhammad ALAM, Giri DEIVASIGAMANI, Samy KHAY-IBBAT, Srinivasan VASUDEVAN, Thanigaivelu ELANGOVAN, Madhusudan CHAUDHARY, Navid DAMJI, Johnson SEBENI, Jianxiong SHI, Shivesh MAKHARIA, Sree KODALI, Onur TACKIN
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Patent number: 8942104Abstract: A method and apparatus for packet classification and prioritization using a user datagram protocol (UDP) header in a mobile wireless device. The mobile wireless device includes an application processor and a transceiver. The application processor sets a value of a field embedded in a higher layer packet and transfers the higher layer packet to the transceiver. The transceiver receives the higher layer packet from the application processor and reads the set value of the embedded field. The transceiver clears the value in the embedded field and creates at least one lower layer protocol data unit from the higher layer packet. The transceiver maps the lower layer protocol data unit to a wireless access channel having a transmission property based on the read value of the embedded field. In representative embodiments, the embedded field is an optional checksum in a UDP header.Type: GrantFiled: August 27, 2010Date of Patent: January 27, 2015Assignee: Apple Inc.Inventors: Cherif Jazra, Sundararaman V. Shiva, Thanigaivelu Elangovan, Tong Liu, Madhusudan Chaudhary
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Publication number: 20140362830Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. In prior art designs, the instantaneous jitter is derived from a weighted history of the media stream, and consequently only packets that have already arrived are used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.Type: ApplicationFiled: June 2, 2014Publication date: December 11, 2014Applicant: Apple Inc.Inventors: Luciano M. Verger, Madhusudan Chaudhary, Onur E. Tackin, Oren M. Elrad, Srinivasan Vasudevan, Thanigaivelu Elangovan, Tiange Shao
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Publication number: 20140355505Abstract: Methods, apparatuses and computer readable media are described that configure wireless circuitry of a wireless communication device. The wireless communication device establishes a connection to a first wireless network using first and second receiving signaling chains. In response to detecting a radio frequency tune-away event, the wireless communication device reconfigures only one of the radio frequency signaling chains to receive signals from a second wireless network when a set of receive signal conditions for the second wireless network is satisfied. The wireless communication device reconfigures both of the radio frequency signaling chains to the second wireless network when the set of receive signal conditions is not satisfied.Type: ApplicationFiled: August 18, 2014Publication date: December 4, 2014Inventors: Li SU, Thanigaivelu ELANGOVAN
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Publication number: 20140242925Abstract: A wireless electronic device having first and second baseband processors is provided. In one suitable arrangement, radio-frequency power splitters and adjustable low noise amplifiers may be form in the receive paths. The use of power splitters allow signals associated with the first and second baseband processors to be received in parallel. In another suitable arrangement, radio-frequency switches are used in place of the power splitters. The states of the switches may be controlled using at least one of the first and second baseband processors. The use of switches instead of power splitters requires that wake periods associated with the first baseband processor and wake periods associated with the second baseband processor are non-overlapping. To ensure minimal wake period collision, a wake period associated with the second baseband processor may be positioned at a midpoint between two successive wake periods associated with the first baseband processor.Type: ApplicationFiled: May 12, 2014Publication date: August 28, 2014Applicant: Apple Inc.Inventors: Syed A. Mujtaba, Madhusudan Chaudhary, Thanigaivelu Elangovan, Karthik Anantharaman, Weiping Dou, Isabel G. Mahe
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Patent number: 8811421Abstract: Methods, apparatuses and computer readable media are described that configure wireless circuitry of a wireless communication device. The wireless communication device establishes a connection to a first wireless network using first and second receiving signaling chains. In response to detecting a radio frequency tune-away event, the wireless communication device reconfigures only one of the radio frequency signaling chains to receive signals from a second wireless network when a set of receive signal conditions for the second wireless network is satisfied. The wireless communication device reconfigures both of the radio frequency signaling chains to the second wireless network when the set of receive signal conditions is not satisfied.Type: GrantFiled: September 25, 2013Date of Patent: August 19, 2014Assignee: Apple Inc.Inventors: Li Su, Thanigaivelu Elangovan
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Publication number: 20140219151Abstract: A method for reducing power consumption in connected mode discontinuous reception is disclosed. The method can include a wireless communication device sending a transmission for a pending HARQ retransmission process and receiving an ACK for the transmission. The method can further include the wireless communication device determining a subset of remaining uplink transmission opportunities in the pending HARQ retransmission process to monitor for an uplink grant in response to receiving the ACK and monitoring the subset of remaining uplink transmission opportunities for an uplink grant.Type: ApplicationFiled: February 5, 2014Publication date: August 7, 2014Applicant: Apple Inc.Inventors: Navid Damji, Giri Prassad Deivasigamani, Johnson O. Sebeni, Luciano M. Verger, Madhusudan Chaudhary, Samy Khay-Ibbat, Sarma V. Vangala, Shivesh Makharia, Sree Ram Kodali, Srinivasan Vasudevan, Thanigaivelu Elangovan, Zhu Ji
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Publication number: 20140198699Abstract: A connection with a network that includes a base station (BS) may be established by a user device (UE) via a wireless connection, for conducting communications using semi persistent scheduling (SPS) in a connected discontinuous reception (C-DRX) mode. The SPS transmit periodicity may be adjusted with respect to the SPS activation command and the SPS interval UL (for uplink). Data may then be transmitted during the C-DRX On-Duration periods according to the determined SPS transmit periodicity. In some embodiments, the SPS transmit periodicity is adjusted such that following a first C-DRX On-Duration period when an SPS activation command is received, SPS data transmission occurs a specified number of subframes earlier during each subsequent C-DRX On-Duration period than in the first C-DRX On-Duration period. The SPS data transmission in each subsequent C-DRX On-Duration period may take place as soon as the UE device wakes up during the On-Duration period.Type: ApplicationFiled: January 13, 2014Publication date: July 17, 2014Applicant: Apple Inc.Inventors: Shivesh Makharia, Sree Ram Kodali, Navid Damji, Thanigaivelu Elangovan, Luciano Verger, Madhusudan Chaudhary, Johnson O. Sebeni, Srinivasan Vasudevan, Samy Khay-Ibbat, Longda Xing, Jianxiong Shi
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Patent number: 8743852Abstract: A wireless electronic device having first and second baseband processors is provided. In one suitable arrangement, radio-frequency power splitters and adjustable low noise amplifiers may be form in the receive paths. The use of power splitters allow signals associated with the first and second baseband processors to be received in parallel. In another suitable arrangement, radio-frequency switches are used in place of the power splitters. The states of the switches may be controlled using at least one of the first and second baseband processors. The use of switches instead of power splitters requires that wake periods associated with the first baseband processor and wake periods associated with the second baseband processor are non-overlapping. To ensure minimal wake period collision, a wake period associated with the second baseband processor may be positioned at a midpoint between two successive wake periods associated with the first baseband processor.Type: GrantFiled: January 11, 2012Date of Patent: June 3, 2014Assignee: Apple Inc.Inventors: Syed A. Mujtaba, Madhusudan Chaudhary, Thanigaivelu Elangovan, Karthik Anantharaman, Weiping Dou, Isabel G. Mahe
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Patent number: 8744518Abstract: A single radio wireless communications device is contemplated in which the user equipment (UE) operates according to more than one radio access technology. The UE may operate preferentially according to a first radio access technology, and may switch to a different radio access technology at predetermined intervals to check for incoming calls. An error unit within the UE may provide frequency error estimates to a GPS unit during operation according to the first radio access technology based upon signals received in the first radio access technology, unless any time spent in the different radio access technology is longer that a predetermined duration. In response to the predetermined duration being met, the error unit may provide the frequency error estimation to the GPS unit based upon signals received in the different radio access technology.Type: GrantFiled: September 14, 2012Date of Patent: June 3, 2014Assignee: Apple Inc.Inventors: Jianxiong Shi, Robert W. Mayor, Li Su, Zhu Ji, Thanigaivelu Elangovan
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Publication number: 20140128060Abstract: A method for negotiating a session personality based at least in part on a roaming agreement is provided. The method can include a roaming access network receiving an identifier provided by an access terminal attendant to establishment of a session between the access terminal and the roaming access network. The method can further include the roaming access network using the identifier to determine a home network associated with the access terminal. The method can additionally include the roaming access network determining one or more radio access technology (RAT) versions covered by a roaming agreement between the home network and the roaming access network. The method can also include the roaming access network negotiating a session personality for use in the session based at least in part on the one or more RAT versions covered by the roaming agreement.Type: ApplicationFiled: November 7, 2013Publication date: May 8, 2014Applicant: Apple Inc.Inventors: Prashant H. Vashi, Thanigaivelu Elangovan, Vikram Bhaskara Yerrabommanahalli
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Publication number: 20140086209Abstract: Methods, apparatuses and computer readable media are described that configure wireless circuitry of a wireless communication device. The wireless communication device establishes a connection to a first wireless network using first and second receiving signaling chains. In response to detecting a radio frequency tune-away event, the wireless communication device reconfigures only one of the radio frequency signaling chains to receive signals from a second wireless network when a set of receive signal conditions for the second wireless network is satisfied. The wireless communication device reconfigures both of the radio frequency signaling chains to the second wireless network when the set of receive signal conditions is not satisfied.Type: ApplicationFiled: September 25, 2013Publication date: March 27, 2014Applicant: Apple Inc.Inventors: Li Su, Thanigaivelu Elangovan
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Publication number: 20140073365Abstract: Performing wireless communication by a user equipment (UE) device communicating with a first wireless network and a second wireless network using a single radio. The UE device may receive a page message directed to the UE device from the first wireless network. In response to receiving the page message, the UE device may provide an extended service request (ESR) message to the second wireless network. After providing the ESR message, the UE device may respond to the page message on the first wireless network.Type: ApplicationFiled: September 18, 2012Publication date: March 13, 2014Applicant: Apple Inc.Inventors: Anish K. Goyal, Thanigaivelu Elangovan, Li Su, Jianxiong Shi
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Publication number: 20130286853Abstract: Methods and apparatus for network-based detection and mitigation of hybrid client device reception outage events. For example, in one embodiment, a cellular device uses a single-radio solution to support circuit-switched calls on a CDMA 1X network and packet-switched calls on LTE. Periodically, the cellular device tunes away from LTE and monitors CDMA 1X activity, and vice versa. During these tuned-away periods, the network adjusts operation to mitigate adverse effects (e.g., underutilization of radio resources, synchronization loss, etc.).Type: ApplicationFiled: March 26, 2013Publication date: October 31, 2013Inventors: Jianxiong Shi, Johnson O. Sebeni, Li Su, Navid Damji, Paul V. Flynn, Sarma V. Vangala, Sreevalsan Vallath, Thanigaivelu Elangovan, Zhu Ji
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Publication number: 20130267259Abstract: A single radio wireless communications device is contemplated in which the user equipment (UE) operates according to more than one radio access technology. The UE may operate preferentially according to a first radio access technology, and may switch to a different radio access technology at predetermined intervals to check for incoming calls. An error unit within the UE may provide frequency error estimates to a GPS unit during operation according to the first radio access technology based upon signals received in the first radio access technology, unless any time spent in the different radio access technology is longer that a predetermined duration. In response to the predetermined duration being met, the error unit may provide the frequency error estimation to the GPS unit based upon signals received in the different radio access technology.Type: ApplicationFiled: September 14, 2012Publication date: October 10, 2013Inventors: Jianxiong Shi, Robert W. Mayor, Li Su, Zhu Ji, Thanigaivelu Elangovan
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Publication number: 20130237215Abstract: Methods and apparatus for client-based capabilities management for e.g., heterogeneous networks. In one exemplary embodiment, a client device associated with a cellular (e.g., EV-DO) network attempts to negotiate a session with a visited network while roaming. The negotiated session is selected from only the set of available capabilities (only the personalities which have a roaming agreement between the home network and the visited network), to ensure that the session negotiation can complete successfully. Once the session is negotiated, the visited network can execute standard authentication and authorization procedures with the assistance of the home network.Type: ApplicationFiled: September 20, 2012Publication date: September 12, 2013Inventors: Phrasant H. Vashi, Vikram B. Yerrabommanahalli, Thanigaivelu Elangovan
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Publication number: 20130016632Abstract: A wireless electronic device having first and second baseband processors is provided. In one suitable arrangement, radio-frequency power splitters and adjustable low noise amplifiers may be form in the receive paths. The use of power splitters allow signals associated with the first and second baseband processors to be received in parallel. In another suitable arrangement, radio-frequency switches are used in place of the power splitters. The states of the switches may be controlled using at least one of the first and second baseband processors. The use of switches instead of power splitters requires that wake periods associated with the first baseband processor and wake periods associated with the second baseband processor are non-overlapping. To ensure minimal wake period collision, a wake period associated with the second baseband processor may be positioned at a midpoint between two successive wake periods associated with the first baseband processor.Type: ApplicationFiled: January 11, 2012Publication date: January 17, 2013Inventors: Syed A. Mujtaba, Madhusudan Chaudhary, Thanigaivelu Elangovan, Karthik Anantharaman, Weiping Dou, Isabel G. Mahe
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Publication number: 20120033563Abstract: A method and apparatus for packet classification and prioritization using an internet protocol (IP) header in a mobile wireless device. The mobile wireless device includes an application processor and a transceiver. The transceiver in the mobile wireless device receives a higher layer packet from the application processor and reads a value of a field embedded in the higher layer packet. The transceiver creates at least one lower layer protocol data unit from the higher layer packet and maps the at least one lower layer protocol data unit to a wireless access channel having a quality of service property. The mapping of the lower layer protocol data unit is based on the value of the field read by the transceiver. In representative embodiments, the higher layer packet is an internet protocol datagram, and the field is a differentiated services code point field.Type: ApplicationFiled: August 27, 2010Publication date: February 9, 2012Applicant: Apple Inc.Inventors: Cherif JAZRA, Sundararaman V. SHIVA, Thanigaivelu ELANGOVAN, Tong LIU, Madhusudan CHAUDHARY
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Publication number: 20120033590Abstract: A method and apparatus for packet classification and prioritization using a user datagram protocol (UDP) header in a mobile wireless device. The mobile wireless device includes an application processor and a transceiver. The application processor sets a value of a field embedded in a higher layer packet and transfers the higher layer packet to the transceiver. The transceiver receives the higher layer packet from the application processor and reads the set value of the embedded field. The transceiver clears the value in the embedded field and creates at least one lower layer protocol data unit from the higher layer packet. The transceiver maps the lower layer protocol data unit to a wireless access channel having a transmission property based on the read value of the embedded field. In representative embodiments, the embedded field is an optional checksum in a UDP header.Type: ApplicationFiled: August 27, 2010Publication date: February 9, 2012Applicant: APPLE INC.Inventors: Cherif JAZRA, Sundararaman V. SHIVA, Thanigaivelu ELANGOVAN, Tong LIU, Madhusudan CHAUDHARY