Patents Represented by Attorney, Agent or Law Firm Byron Yafuso
  • Patent number: 7406096
    Abstract: Techniques are presented herein to provide tandem-free operation between two wireless terminals through two otherwise incompatible wireless networks. Specifically, embodiments provide tandem-free operation between a wireless terminal communicating through a continuous transmission (CTX) wireless channel to a wireless terminal communicating through a discontinuous transmission (DTX) wireless channel. In a first aspect, inactive speech frames are translated between DTX and CTX formats. In a second aspect, each wireless terminal includes an active speech decoder that is compatible with the active speech encoder on the opposite end of the mobile-to-mobile connection.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: July 29, 2008
    Assignee: QUALCOMM Incorporated
    Inventors: Khaled Helmi El-Maleh, Ananthapadmanabhan Arasanipalai Kandhadai, Sharath Manjunath
  • Patent number: 6782277
    Abstract: A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: August 24, 2004
    Assignee: Qualcomm Incorporated
    Inventors: Tao Chen, Fuyun Ling, Jack Holtzman, Yu-Cheun Jou, Stein A. Lundby
  • Patent number: 6778507
    Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station to subscriber stations in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled phases, to form transmit signal beams corresponding to individual subscriber stations. Data and reference signals are transmitted along beams that change according to fixed time slots and sub-slots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: August 17, 2004
    Assignee: QUALCOMM Incorporated
    Inventor: Ahmad Jalali
  • Patent number: 6757320
    Abstract: A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station generates a set of forward link power control bit in accordance with the measurements and transmits these bits to all base stations in communication with the remote station. Each base station adjusts its gain of the forward traffic channel in accordance to its measurement of the forward link power control bit.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: June 29, 2004
    Assignee: Qualcomm Incorporated
    Inventors: Edward G. Tiedemann, Jr., Keith W. Saints
  • Patent number: 6757553
    Abstract: A method and apparatus for wireless communications wherein a base station transmits and receives wireless signals through multiple directional antennas mounted on a rotating antenna assembly. Signal beams from each directional antenna sweep in one angular direction through multiple sector coverage areas. As a signal beam crosses from one sector to another, the routing of forward and reverse link signals associated with that signal beam are switched from the sector it is exiting to the sector it is entering.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: June 29, 2004
    Assignee: Qualcomm Incorporated
    Inventor: Sean S. English
  • Patent number: 6744743
    Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: June 1, 2004
    Assignee: Qualcomm Incorporated
    Inventors: Jay R. Walton, Mark Wallace, Jack Holtzman, Franklin P. Antonio
  • Patent number: 6678311
    Abstract: A method and apparatus for demodulation in high rate CDMA wireless communication is described. In a described high rate CDMA wireless system, a transmitter forms a set of individually gain adjusted subscriber channels using a set of orthogonal subchannel codes having a small number of PN spreading chips per orthogonal waveform period. An illustrative high rate CDMA wireless system uses Walsh codes, each having a duration of fewer than sixty-four chips per orthogonal waveform period. A receiver demodulates each of the subscriber channels using the same orthogonal subchannel codes.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: January 13, 2004
    Assignee: Qualcomm Incorporated
    Inventor: Joseph P. Odenwalder
  • Patent number: 6665272
    Abstract: When a resource of limited capacity is shared by several users, it is possible for the usage rates of the users to exceed the resource's capacity, thereby causing an overload condition. In a system or method according to an embodiment of the invention, at least some of the users have a set of persistence vectors. When an overload condition is detected, the usage rate of at least one of these users is changed, at least in part according to the user's set of persistence vectors.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: December 16, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Rajesh Pankaj, Matthew Stuart Grob, Paul E. Bender
  • Patent number: 6661833
    Abstract: Techniques to improve the acquisition process in a spread spectrum environment. The signals from different CDMA systems are spread with different sets of PN sequences, with the PN sequences in each set being uncorrelated to the PN sequences in the other sets. By using uncorrelated PN sequences, the likelihood of detecting a pilot signal from an undesired system is reduced or minimized, and the mean time to acquisition of the pilot signal from the desired system is improved. The mobile station can attempt to acquire the pilot signal by processing the received signal with a first set of PN sequences corresponding to a first hypothesis of the particular signal being acquired. If acquisition of the pilot signal fails, a second set of PN sequences corresponding to a second hypothesis is selected and used to process the received signal. The PN sequences in the second set are uncorrelated to the PN sequences in the first set.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: December 9, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Peter J. Black, Roberto Padovani, Lindsay A. Weaver, Jr.
  • Patent number: 6654360
    Abstract: An improved method and system for terminating dormant mode wireless packet data sessions when a remote network node becomes inaccessible. A wireless subscriber station sends the wireless network a termination notification identifying a packet data session corresponding to a remote network node that has become inaccessible and should be terminated.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 25, 2003
    Assignee: Qualcomm Incorporated
    Inventor: Nischal Abrol
  • Patent number: 6621875
    Abstract: A method and apparatus for high rate CDMA wireless communication is described. Variable data rates are generated using a set of different encoder, interleaver, and symbol repetition configurations. An encoder associated with each rate generates a variable number of symbols during each frame period. This variable number of symbols is repeated as necessary to form a constant number of symbols equal to a fixed number of symbols that can be then repeated a fixed number of repetitions before transmission. Where the constant number of symbols is not an integer multiple of the variable number of symbols for a particular rate, a subset of the variable number of symbols is repeated to fill in the remaining symbols necessary to equal the constant number of symbols.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: September 16, 2003
    Assignee: Qualcomm Incorporated
    Inventor: Joseph P. Odenwalder
  • Patent number: 6611566
    Abstract: A transmission method in a communications system has an orthogonal vector and a quasi orthogonal masking function for obtaining a quasi orthogonal vector from the orthogonal vector. Message signals are transmitted according to the quasi orthogonal vector. The method includes receiving the quasi orthogonal masking function and permuting the quasi orthogonal masking function to provide a further quasi orthogonal masking function. The further quasi orthogonal masking function is applied to the orthogonal vector to provide a further quasi orthogonal vector. The further quasi orthogonal vector is applied to the message signal to provide an encoded message signal for transmitting the encoded message signal within the communications system.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: August 26, 2003
    Assignee: QualComm Incorporated
    Inventor: Abhijit G. Shanbhag
  • Patent number: 6608818
    Abstract: An improved method and system for determining round-trip time (RTT) during a radio link protocol (RLP) wireless communication link. The RTT estimate is negotiated by both sides of the RLP communication link without the need for the 3-way handshake generally required for RLP synchronization. The method includes techniques used by both sides of the RLP communication link to dynamically update and refine their initial, negotiated RTT estimates.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: August 19, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Nischal Abrol, Nikolai K. N. Leung
  • Patent number: 6564060
    Abstract: A method of supervising on the forward link in a high data rate system is disclosed, wherein a base station transmits to an access terminal on a forward traffic channel only when the base station has data to send to the access terminal. The base station minimizes the worst-case period necessary to reclaim traffic channel resources following a release by periodically transmitting a configuration packet to its access terminals. The configuration packet indicates the allocation status of the traffic channels belonging to the base station. If an access terminal receives a configuration packet indicating the deallocation of one or all of its traffic channels, the access terminal immediately ceases its use of those traffic channels. If an access terminal fails to successfully decode a configuration packet for a predetermined supervision time, the access terminal releases its connection with all base stations and associated traffic channels.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: May 13, 2003
    Assignee: Qualcomm Incorporated
    Inventor: Greg M. Hoagland
  • Patent number: 6549525
    Abstract: A novel and improved method and apparatus for high rate CDMA wireless communication is described. A set of individually gain adjusted subscriber channels are formed via the use of a set of orthogonal subchannel codes. The set of sub-channel codes are comprised of four Walsh codes. The pilot data and control data are combined onto one channel. The remaining two transmit channels are used for transmitting non-specified digital data including user data or signaling data, or both.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: April 15, 2003
    Assignee: QUALCOMM Incorporated
    Inventor: Joseph P. Odenwalder
  • Patent number: 6545989
    Abstract: A method and system for communicating a frame of information according to both a continuous transmit format and a discontinuous transmit format. The present invention contemplates transmitting one or more data rates in either a continuous transmit mode (814) or a discontinuous transmit mode (812). The present invention contemplates continuous transmission only for certain data rates, and selection between continuous and discontinuous transmission for other data rates (810). Frames transmitted in the discontinuous transmit mode may be transmitted at a higher transmit power than in the continuous transmit mode (820). In one embodiment, the information is transmitted at a fifty-percent duty cycle during the second half of the frame when in the discontinuous transmit mode (808). During periods of non-transmission, an alternative system may be searched for as a possible candidate for hard handoff (816).
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: April 8, 2003
    Assignee: Qualcomm Incorporated
    Inventor: Brian K. Butler
  • Patent number: 6539030
    Abstract: The layers and protocols of an air interface layering architecture are designed to be modular and can be modified and upgraded to support new features, perform complex tasks, and implement additional functionality. Prior to commencement of data communication between a first entity (e.g., an access terminal) and a second entity (e.g., a radio network), a set of layers and/or protocols is selected for negotiation. For each selected layer and protocol (i.e., each attribute), a list of attribute values considered acceptable to the first entity is determined. The selected attributes and their associated attribute values are sent from the first entity and, in response, a list of processed attributes and their associated lists of processed attribute values are received. Each list of processed attribute values includes attribute values considered acceptable to the second entity.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: March 25, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Paul E. Bender, Gadi Karmi, Bibhu Mohanty
  • Patent number: 6535496
    Abstract: Demodulation of a received high rate CDMA wireless signal is obtained by filtering a complex received signal to provide a complex pilot filter signal. The complex pilot filter signal is then used to phase-adjust a set of demodulated subscriber channel signals.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: March 18, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Joseph P. Odenwalder, Yu-Cheun Jou, Edward G. Tiedemann, Jr.
  • Patent number: 6526030
    Abstract: A channel structure for use in communication systems. Two sets of physical channels, one for the forward link and another for the reverse link, are utilized to facilitate communication of a variety of logical channels. The physical channels comprise data and control channels. In the exemplary embodiment, the data channels comprise fundamental channels which are used to transmit voice traffic, data traffic, high speed data, and other overhead information and supplemental channels which are used to transmit high speed data. The fundamental channels can be released when the remote stations are idle to more fully utilized the available capacity. The control channels are used to transmit paging and control messages and scheduling information.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: February 25, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Ramin Rezaiifar, Yu-Cheun Jou, Edward G. Tiedemann, Jr.
  • Patent number: 6507582
    Abstract: An improved method and system for transmitting a stream of data bytes through a channel whose capacity may change during transmission. By utilization of selective regions of sequence number space, the enhanced radio link protocol (RLP) provides the benefits of large byte sequence numbers while transmitting a fraction of the sequence number bits in the majority of over-the-air frames. Frame header sequence numbers are shortened by dividing the byte sequence number by a page size, and by performing a modulo function on the byte sequence number.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: January 14, 2003
    Assignee: Qualcomm Incorporated
    Inventor: Nischal Abrol