Patents by Inventor Anit Lohtia

Anit Lohtia 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: 7200125
    Abstract: In a wireless communications network, different service levels can be subscribed to by users of mobile stations for packet-switched communications, such as electronic mail, web browsing, text chat, packet-switched voice communications, and so forth. In one arrangement, two different levels are defined. For a first level, when there is no more data to send over a wireless interface between a mobile station and a wireless access system, a logical connection between the mobile station and wireless access system is released. However, at a second level, the logical connection between the mobile station and the wireless access system is not released until after a predetermined timed period from when a send buffer becomes empty, with the send buffer containing data for sending over the wireless interface. A benefit of releasing the logical connection after some predetermined wait period is that the delays associated with establishing another logical connection are reduced.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: April 3, 2007
    Assignee: Nortel Networks Limited
    Inventors: Anit Lohtia, Paul Chan H. Tse, Isa B. Atallah
  • Publication number: 20070064650
    Abstract: In a wireless communications network, the presence of a wireless local area network in a cell segment is determined. An identifier of the wireless local area network in the cell segment is sent to at least one mobile station in the cell segment to enable the at least one mobile station to hand off to the wireless local area network. Optionally, information identifying geographic boundaries of cell segments and the wireless local area network can be sent to the at least one mobile station.
    Type: Application
    Filed: September 16, 2005
    Publication date: March 22, 2007
    Applicant: Nortel Networks Limited
    Inventors: Anit Lohtia, Yuqiang Tang, Miroslav Budic
  • Patent number: 7133385
    Abstract: An ANC is formed to “dummy fill” a neighbor list that is to be transmitted to a mobile terminal that is presently located in a border cell with neighboring BTSs for which a hand-off request cannot be granted. Accordingly, while a hand-off cannot occur to a BTS of a proximate cell that does not qualify as a neighbor because it is serviced by a different ANC in a 1xEVDO network, identifying the BTSs of the non-neighbor and proximate cells (“dummy list BTSs”) prompts the mobile terminal to request a hand-off to a dummy list BTS when the BTS provides a better pilot signal. Because the ANC can readily identify the BTS from the dummy list, it knows that a hand-off cannot be facilitated therefor. Accordingly, the ANC instructs the mobile terminal to drop the call (data packet connection).
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: November 7, 2006
    Assignee: Nortel Networks Limited
    Inventors: Anit Lohtia, Miroslav Budic
  • Patent number: 7116708
    Abstract: A wireless communications network includes a mobile station and wireless access equipment. In communications between the wireless access equipment and the mobile station (such as in the forward link), a data rate is specified. However, the effective data rate can be reduced (with respect to the specified data rate) if it is determined that the specified data rate is not needed. In one arrangement, the effective data rate is reduced by waiting to fill a physical layer packet before transmission.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: October 3, 2006
    Assignee: Nortel Networks Limited
    Inventors: Anit Lohtia, David W. Paranchych, Yuqiang Tang
  • Patent number: 7085249
    Abstract: A method, system and program product which improves the QoS and GoS of voice and data traffic on an integrated communications network. An RF spectrum allocation application/algorithm provides initial allocation of a percentage of available spectral resources to current voice and data traffic. Each allocated percentage is bounded by a sliding window, which adjusts its location based on the changing need for the resources. Thus, a voice sliding window dynamically adjusts its location to provide additional spectral resources to voice traffic when the voice traffic increases and provides less spectral resources when the voice traffic decreases. Likewise, a data sliding window dynamically adjusts its location to provide additional spectral resources to data traffic when the data traffic increases and provides less spectral resources when the data traffic decreases. The size of each window is determined by input parameters.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: August 1, 2006
    Assignee: Nortel Networks Limited
    Inventors: Anit Lohtia, Miroslav Budic, Yuqiang Tang
  • Patent number: 6907228
    Abstract: A mobile communications network includes a plurality of cells and cell sectors in each cell. Carrier frequencies for carrying beacon control signaling, such as a broadcast control channel (BCCH), are assigned from the entire band of available carrier frequencies. The same carrier frequencies are assigned to carry traffic channels. This arrangement enables the use of one carrier frequency to communication beacon control signaling in one cell segment, while also allowing the use of the same one carrier frequency to communicate bearer traffic in another cell segment, thus affording substantial increases in network capacity that has heretofore not been possible in networks in the absence of significant infrastructure buildout or modification.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: June 14, 2005
    Assignee: Nortel Networks Limited
    Inventors: Anit Lohtia, Yuqiang Tang, Paul Chan H. Tse
  • Publication number: 20040001461
    Abstract: A wireless communications network includes cell segments each having at least a first type wireless link and a second, different type wireless link. Network access equipment is able to hand off mobile stations between the first type and second type wireless links to balance the loading of the wireless links. In one example implementation, the first type wireless link is a 1×EV wireless link, and the second type wireless link is a 1×RTT or other CDMA 2000 wireless link. The carriers can be co-located within a common cell segment, or located within different cell segments.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: Anit Lohtia, Yuqiang Tang, Miroslav Budic
  • Publication number: 20040001536
    Abstract: A wireless communications network includes a mobile station and wireless access equipment. In communications between the wireless access equipment and the mobile station (such as in the forward link), a data rate is specified. However, the effective data rate can be reduced (with respect to the specified data rate) if it is determined that the specified data rate is not needed. In one arrangement, the effective data rate is reduced by waiting to fill a physical layer packet before transmission.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 1, 2004
    Inventors: Anit Lohtia, David W. Paranchych, Yuqiang Tang
  • Publication number: 20030218997
    Abstract: A wireless communications system includes access networks and access terminals. Within each cell or cell sector, reverse links and forward links are defined between an access network and multiple access terminals in the cell or cell sector. Based on a reverse data rate threshold value calculated from noise measurements, the access network indicates to access terminals within its cell or cell sector whether activity on reverse links are to be increased or decreased.
    Type: Application
    Filed: May 21, 2002
    Publication date: November 27, 2003
    Inventors: Anit Lohtia, Yuqiang Tang, Miroslav Budic
  • Publication number: 20030185183
    Abstract: An ANC is formed to “dummy fill” a neighbor list that is to be transmitted to a mobile terminal that is presently located in a border cell with neighboring BTSs for which a hand-off request cannot be granted. Accordingly, while a hand-off cannot occur to a BTS of a proximate cell that does not qualify as a neighbor because it is serviced by a different ANC in a 1xEVDO network, identifying the BTSs of the non-neighbor and proximate cells (“dummy list BTSs”) prompts the mobile terminal to request a hand-off to a dummy list BTS when the BTS provides a better pilot signal. Because the ANC can readily identify the BTS from the dummy list, it knows that a hand-off cannot be facilitated therefor. Accordingly, the ANC instructs the mobile terminal to drop the call (data packet connection).
    Type: Application
    Filed: March 29, 2002
    Publication date: October 2, 2003
    Inventors: Anit Lohtia, Miroslav Budic
  • Publication number: 20030112784
    Abstract: A method, system and program product which improves the QoS and GoS of voice and data traffic on an integrated communications network. An RF spectrum allocation application/algorithm provides initial allocation of a percentage of available spectral resources to current voice and data traffic. Each allocated percentage is bounded by a sliding window, which adjusts its location based on the changing need for the resources. Thus, a voice sliding window dynamically adjusts its location to provide additional spectral resources to voice traffic when the voice traffic increases and provides less spectral resources when the voice traffic decreases. Likewise, a data sliding window dynamically adjusts its location to provide additional spectral resources to data traffic when the data traffic increases and provides less spectral resources when the data traffic decreases. The size of each window is determined by input parameters.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 19, 2003
    Applicant: Nortel Networks Limited
    Inventors: Anit Lohtia, Miroslav Budic, Yuqiang Tang
  • Publication number: 20030072267
    Abstract: In a wireless communications network, different service levels can be subscribed to by users of mobile stations for packet-switched communications, such as electronic mail, web browsing, text chat, packet-switched voice communications, and so forth. In one arrangement, two different levels are defined. For a first level, when there is no more data to send over a wireless interface between a mobile station and a wireless access system, a logical connection between the mobile station and wireless access system is released. However, at a second level, the logical connection between the mobile station and the wireless access system is not released until after a predetermined timed period from when a send buffer becomes empty, with the send buffer containing data for sending over the wireless interface. A benefit of releasing the logical connection after some predetermined wait period is that the delays associated with establishing another logical connection are reduced.
    Type: Application
    Filed: October 12, 2001
    Publication date: April 17, 2003
    Inventors: Anit Lohtia, Paul Chan H. Tse, Isa B. Atallah
  • Publication number: 20020082033
    Abstract: A wireless communications system includes a mobile station and a base station system that are capable of communicating on the wireless links (uplink and downlink). The mobile station is capable of establishing a logical connection, such as a temporary block flow, on the uplink, while the base station system establishes a logical connection on the downlink. When either the mobile station or the base station system detects end of data transmission, a predetermined wait period is started during which the mobile station or base station system does not start a procedure to release the logical connection on the uplink or downlink.
    Type: Application
    Filed: January 25, 2001
    Publication date: June 27, 2002
    Inventors: Anit Lohtia, Paul Chan H. Tse