Patents Represented by Attorney Kam T. Tam
  • Patent number: 8351363
    Abstract: In a communication system providing broadcast services in which files for broadcast are accessible by the users. Contents of the broadcast files and the file attributes required to process the broadcast files are separately sent. As arranged, receiving the file attributes ahead of the content files allow more efficient download and processing of the broadcast files.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: January 8, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Chris Bennett, Charles Lo, Kirti Gupta, Ranjith Jayaram, Thadi Nagaraj, Gordon Kent Walker
  • Patent number: 8331445
    Abstract: A method, apparatus, and system for providing distributed source coding techniques that improve data coding performance, such as video data coding, when channel errors or losses occur. Errors in the reconstruction of the data is eliminated or reduced by sending extra information. Correlation between a predicted sequence and an original sequence can be used to design codebooks and find the cosets required to represent the original image. This information may be sent over another channel, or a secondary channel.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: December 11, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Harinath Garudadri, Naveen B. Srinivasamurthy, Hyukjune Chung, Kannan Ramachandran, Abhik Majumdar
  • Patent number: 8285331
    Abstract: A system and method for performing base station initiated call setup is provided. A base station initiated call setup may be utilized to establish a test call, to deliver a packet data services call to a subscriber unit, or to reactivate a dormant packet call. The base station transmits a BS Service Request message to the mobile switching center, requesting initiation of the call. The mobile switching center will authorize the call if the call to be set up is directed to a subscriber unit located within the service area of the base station and if the service option to be used is authorized for the particular subscriber unit. The mobile switching center will allow or disallow the call depending on the state of the subscriber unit. The mobile switching center transmits a BS Service Response message to the base station, conveying the result of processing the BS Service Request message.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: October 9, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Rajeev Krishnamurthi, Roy F. Quick, Bibhu Mohanty, Robert H. Kimball
  • Patent number: 8265060
    Abstract: In a packet data communication system in which communicating nodes assume different modes of communications, and packet data are sent through a monitoring intermediary for data traffic control, the different modes of communications are directly sent to the monitoring intermediary so as to allow the monitoring intermediary to straightforwardly set up data filters for carrying out the data control and monitoring functions.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: September 11, 2012
    Assignee: QUALCOMM, Incorporated
    Inventors: Arungundram C. Mahendran, Raymond Tah-Sheng Hsu
  • Patent number: 8249021
    Abstract: IIF architectures and corresponding call flows are provided for CDMA2000/GPRS roaming scenarios such as GPRS foreign mode with Mobile IPv4, GPRS foreign mode with Simple IPv4 or IPv6, CDMA2000 packet data foreign mode with Mobile IPv4, and CDMA2000 packet data foreign mode with Simple IPv4 or IPv6.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: August 21, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: John W. Nasielski, Raymond T. Hsu
  • Patent number: 8233416
    Abstract: In a communication system in which a roaming node seeking network access among different networks which are implemented with different network interface layer protocols, handoff schemes are instituted whereby the node may freely move from one network to another with reduced levels of interruptions with respect to the network access. Prior to and at the onset of a handoff, the node receives an indication for the handoff. The indication may be embodied in various forms such as a signal message indicating a change of the SID (System Identification), NID (Network Identification), or PZID (Packet Zone Identification). Alternatively, the indication can be in the form of information straightforwardly included in a data packet sent to the roaming node prior to the handoff. As another alternative, the indication can be implemented as distinguishable message patterns sent to the node in which different message patterns can be sent by different networks supporting different network interface layer protocols.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: July 31, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Masakazu Shirota, Jun Wang, Marcello Lioy
  • Patent number: 8228935
    Abstract: Systems, methodologies, and devices are described that enable communication devices, such as mobile devices, to efficiently connect and communicate with public data networks (PDNs) even if overlapping Internet protocol address spaces exist in the PDNs. The subject innovation can employ virtual home agents (v-HAs) that can respectively serve PDNs. To facilitate connection of a mobile device to a desired PDN, a message, including an identifier relating to the desired PDN, can be transmitted to a v-HA and it can be discovered whether that v-HA serves the desired PDN; if so, the v-HA transmits the message to a “home” home agent (h-HA) associated with the desired PDN; and if not, the v-HA can transmit a switch message indicating the correct v-HA to which the message should be sent. Concatenation of communication tunnels associated with the correct v-HA and h-HA facilitate efficient communication associated with the mobile device and desired PDN.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: July 24, 2012
    Assignee: Qualcomm Incorporated
    Inventors: George Tsirtsis (Georgios), Gerardo Giaretta, Lorenzo Casaccia, Kalle I. Ahmavaara
  • Patent number: 8213934
    Abstract: The claimed subject matter relates to assigning a home agent to a wireless terminal during authentication, authorization, and/or accounting with respect to the wireless terminal. The wireless terminal can provide identifying indicia which can be relayed to a AAA server by way of a base station. The AAA server can then determine one or more home agents that can be associated with the wireless terminal. If more than one home agent can be assigned to the wireless terminal, the base station can resolve which home agent to utilize during registration of the wireless terminal. Such determination can be important with respect to MVNOs.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: July 3, 2012
    Assignee: Qualcomm Incorporated
    Inventors: George Tsirtsis, M. Scott Corson, Vincent D. Park
  • Patent number: 8204495
    Abstract: The present apparatus comprises a radio access network element having at least one processor, and at least one memory operably connected to the at least one processor, whereby the radio access network element is adapted to execute instructions stored in the memory comprising discovery of at least one other element in a radio access network. The radio access element further comprises instructions for removal or addition of network elements, instructions for determining a paging area and instructions for forwarding messages from a mobile to a controller in another domain.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: June 19, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Paul E. Bender, Noam A. Ziv, Vito R. Bica, Rahul Anand, Sreekanth Vietla
  • Patent number: 8195943
    Abstract: Techniques for deriving temporary identifiers (IDs) used to address specific user equipments (UEs) in a wireless communication network are described. At a network entity, a first ID assigned to a UE and additional information such as, e.g., a salt value and/or shared secret data for the UE, are transformed to obtain a second ID for the UE. The first ID and/or the shared secret data may be updated, e.g., whenever a signaling message is sent to the UE. A signaling message directed to the UE is generated based on the second ID and sent via a common channel. At the UE, a message is received via the common channel. The first ID and additional information such as, e.g., a salt value obtained from the received message and/or shared secret data for the UE, are transformed to obtain the second ID, which is used to determine whether the received message is intended for the UE.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: June 5, 2012
    Assignee: Qualcomm Incorporated
    Inventor: Nathan Edward Tenny
  • Patent number: 8194551
    Abstract: Methods and apparatus for network controlled mobile IP flow movement. An infrastructure node, such as a home agent, signals a mapping between care-of-addresses (CoAs) and flows to be transmitted from a mobile device in uplink communications. The CoA associated with each flow is determined from network, device, and/or flow information. A mobile node or mobile gateway receives the mapping and updates its local policy information. When a selected flow is to be transmitted in an uplink transmission, the local policy information is used to determine the CoA associated with the selected flow. The CoA is then used to determine an access network (or access path) on which the uplink transmission of the selected flow is to occur.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: June 5, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Georgios Tsirtsis, Kalle Ahmavaara, Haipeng Jin, Gerardo Giaretta
  • Patent number: 8184607
    Abstract: Rather than attaching a preamble to a data traffic subpacket, a preamble channel is transmitted along with a traffic channel. In a system wherein the data traffic subpackets are variably sized, preambles can also be variably sized if a target station can decode variably sized preambles. A method and apparatus for decoding variably sized preamble subpackets are presented herein.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: May 22, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Joseph P. Odenwalder, Sandip Sarkar, Yongbin Wei
  • Patent number: 8179840
    Abstract: This document describes a way to extend Mobile IP Authentication Authorization and Accounting (AAA) signaling to enable a node to request from a network operator combinations of home and local service capabilities (when roaming) in an efficient and scalable manner. It also enables the home and foreign service providers to constrain and account for actual services provided based on a combination of the foreign and home operator policy.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: May 15, 2012
    Assignee: Qualcomm Incorporated
    Inventor: Alan O'Neill
  • Patent number: 8095130
    Abstract: Extending Mobile IP to support both local and remote access by using two MIP client stacks in the end node, a roaming Node in the local access network, a standard Home Agent in the remote network. Messages between the AR and the MN, and between the internal modules of the MN, are then used to control hand-off for each MIP client and to enable backwards compatibility with legacy remote access clients.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: January 10, 2012
    Assignee: QUALCOMM Incorporated
    Inventor: Alan O'Neill
  • Patent number: 8064401
    Abstract: Systems and methodologies are described that facilitate handing off from a first sector to a second sector. An established link to the first sector may be employed to communicate with the second sector. A handoff request from a wireless terminal to the second sector and an associated handoff response from the second sector to the wireless terminal may both traverse the first sector.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: November 22, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Pablo Anigstein, Junyi Li, Murari Srinivasan, Rajiv Laroia
  • Patent number: 8042170
    Abstract: In a communication session in which data flows with encrypted data packets pass through a monitoring intermediary for data traffic control. The encrypted data packets include SPIs (Secured Parameter Indexes) which are used to identify SAs (Security Associations) for data decryption. During the initial signaling process for the communication session, the nodes seeking the communication session include the SPIs in the signaling messages and send the signaling messages through the monitoring intermediary which in turn matches the SPIs of the signaling messages with the corresponding SPIs extracted from the data packets. In enforcing data traffic control, the monitoring intermediary allows data flows to pass through if comparison matches in the SPIs are found. Otherwise, the data flows are rejected.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: October 18, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Arungundram C. Mahendran, Jun Wang, Raymond Tah-Sheng Hsu
  • Patent number: 8027242
    Abstract: In an apparatus and method, time-varying signals are processed and encoded via a frequency domain linear prediction (FDLP) scheme to arrive at an all-pole model. Residual signals resulted from the scheme are estimated. Quantized values of the all-pole model and the residual signals are packetized as encoded signals suitable for transmission or storage. To reconstruct the time-varying signals, the encoded signals are decoded. The decoding process is basically the reverse of the encoding process.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: September 27, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Harinath Garudadri, Naveen B. Srinivasamurthy, Petr Motlicek, Hynek Hermansky
  • Patent number: 8023464
    Abstract: Mobile unassisted dormant handoff in a wireless communication system supporting packet data communications. While in a dormant mode, a mobile node may change packet zones, wherein different packet zones are serviced by at least one different infrastructure element, without identifying the change to the system. The change in packet zone does not necessarily trigger establishment of a communication path for the mobile node until there is packet data ready for communication. In one embodiment, mobile assistance is adapted to the system, and is disabled at the mobile node by an indication in a system parameter message transmitted by the system and received by the mobile node.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: September 20, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Raymond T. Hsu, Arungundram C. Mahendran
  • Patent number: 8010104
    Abstract: Techniques to reduce the amount of registration required by a mobile station in a wireless communication system, especially if the registration zones are defined to be small areas. In one scheme, a mobile station registers (e.g., at RR-level) with a network entity (e.g., a base station) each time it enters a new registration zone, which can correspond to an R-TMSI zone defined by GSM MC-MAP. The mobile station maintains a timer for each zone with which it has already registered but has since left. If the mobile station leaves a particular zone for a period longer than a time-out period, the registration with that zone times out, and the mobile station re-registers with that zone whenever it re-enters the zone. The mobile station may implement zone-based, timer-based, implicit, traffic channel RR, and some other registrations, or a combination thereof. Parameters to facilitate registration may be defined by a base station.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: August 30, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Avinash Jain, Edward G Tiedemann, Jr.
  • Patent number: 8010113
    Abstract: A communication system including a closed loop power control system. Prior to allowing a handoff to a new base station, the subscriber station verifies that its reverse link signal is being received by the destination base station with sufficient energy. The determination is made based on the received reverse link power control commands from the base station. Moreover, a handoff may be forced when the base station providing the best forward link signal in not receiving the reverse link signal from the subscriber station with sufficient energy.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: August 30, 2011
    Assignee: QUALCOMM Incorporated
    Inventor: Peter John Black