Patents by Inventor Sari Korpela
Sari Korpela 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: 7912034Abstract: A communication method and system are provided that include providing synchronization information about a co-sited downlink carrier. This information may be transmitted to from a base station to a mobile device. The mobile device may receive this information and perform handover or measurements based on the received synchronization information.Type: GrantFiled: April 9, 2009Date of Patent: March 22, 2011Assignee: Nokia CorporationInventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela, Jussi Numminen
-
Patent number: 7853260Abstract: A method and system for cell identification for uplink interference avoidance that includes a network device and mobile device in a communications network. Inter-frequency measurements are performed by a mobile device on a downlink carrier currently not used by the mobile device. A result of the inter-frequency measurements is compared with another value. Second measurements are initiated on the downlink carrier currently not used by the mobile device based on the comparison. A cell is identified based on the second measurements. The inter-frequency measurements may include receive signal strength indicator (RSSI) measurements, received signal code power (RSCP) measurements, or average channel power-to-total signal power ratio (Ec/Io) measurements. The second measurements may include signal quality measurements.Type: GrantFiled: April 24, 2003Date of Patent: December 14, 2010Assignee: Nokia CorporationInventors: Harri Holma, Uwe Schwarz, Peter Muszynski, Sari Korpela
-
Patent number: 7724720Abstract: A method transmits a certain sequence of symbols, where a frame is constructed of a certain number of consecutive symbols. The symbols belonging to the sequence are transmitted using at least two antennas and the transmission of the sequence of symbols is with a certain transmission pattern. The transmission of the sequence of symbols is started from a predefined antenna and the transmission pattern is started from the beginning in the beginning of each frame. Also disclosed is an apparatus and a network element for controlling the transmission of a sequence of symbols.Type: GrantFiled: July 17, 2006Date of Patent: May 25, 2010Assignee: Nokia CorporationInventors: Sari Korpela, Janne Koivisto, Kaj Jansen
-
Publication number: 20090219893Abstract: A method and system for soft handover area detection for uplink interference avoidance that includes a network device and mobile device in a communications network. A trigger criteria threshold is determined for the mobile device. The mobile device is using a downlink carrier. If a trigger criteria has risen above or fallen below the trigger criteria threshold, inter-frequency measurements of co-sited cells are performed and compared to determine if a soft handover area exists. Co-sited cells are searched for downlink carriers and reselection is initiated from the downlink carrier to a co-sited cell downlink carrier if the co-sited cell downlink carrier is useable by the mobile device. Reselection is initiated from the downlink carrier to a non co-sited cell downlink carrier if no co-sited cell downlink carrier useable by the mobile device is found. The system provides for reselection while uplink carrier interference is avoided.Type: ApplicationFiled: April 9, 2009Publication date: September 3, 2009Inventors: Sari Korpela, Jussi Numminen, Kjell Ostman, Kaj Jansen, Kari Rikkinen, Uwe Schwarz, Peter Muszynski
-
Publication number: 20090219889Abstract: A communication method and system are provided that include providing synchronization information about a co-sited downlink carrier. This information may be transmitted to from a base station to a mobile device. The mobile device may receive this information and perform handover or measurements based on the received synchronization information.Type: ApplicationFiled: April 9, 2009Publication date: September 3, 2009Inventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela, Jussi Numminen
-
Patent number: 7525948Abstract: A communication method and system are provided that include providing synchronization information about a co-sited downlink carrier. This information may be transmitted to from a base station to a mobile device. The mobile device may receive this information and perform handover or measurements based on the received synchronization information.Type: GrantFiled: April 29, 2003Date of Patent: April 28, 2009Assignee: Nokia CorporationInventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela, Jussi Numminen
-
Patent number: 7424296Abstract: A method and system for soft handover detection for uplink interference avoidance that includes a network device and mobile device in a communications network. The mobile device uses a downlink carrier. A parameter, such as a signal strength or a signal quality, of the downlink carrier and one of a co-sited downlink carrier or neighboring downlink carrier is measured. A soft handover area is detected by the network device or the mobile device based on comparing the signal strength or the signal quality of the downlink carrier with the signal strength or the signal quality of one of the co-sited downlink carrier or the neighboring downlink carrier. The downlink carrier, the co-sited downlink carrier or the neighboring downlink carrier may be from a core band, (e.g., 2.0 GHz), or extension band, (e.g., 2.5 GHz), of frequencies or combination thereof. The system provides for handovers while uplink carrier interference is avoided.Type: GrantFiled: April 9, 2003Date of Patent: September 9, 2008Assignee: Nokia CorporationInventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela
-
Publication number: 20060245409Abstract: A method transmits a certain sequence of symbols, where a frame is constructed of a certain number of consecutive symbols. The symbols belonging to the sequence are transmitted using at least two antennas and the transmission of the sequence of symbols is with a certain transmission pattern. The transmission of the sequence of symbols is started from a predefined antenna and the transmission pattern is started from the beginning in the beginning of each frame. Also disclosed is an apparatus and a network element for controlling the transmission of a sequence of symbols.Type: ApplicationFiled: July 17, 2006Publication date: November 2, 2006Inventors: Sari Korpela, Janne Koivisto, Kaj Jansen
-
Patent number: 6859642Abstract: Signal strength measurements for different frequencies in different cells are calibrated in a cellular communications system. The signal strength of first and second frequencies in at least one cell of a plurality of cells is repeatedly measured. A measurement history is created for said first and second frequencies in at least the one cell. Each measurement history is based on the signal strength measurements of one of the first and second frequencies in the respective one cell. The measurement histories are stored. A respective correction factor is determined for each possible pair of first and second frequencies in at least the one cell. Each correction factor is based on the stored measurement history of the first and second frequencies in the pair. The respective correction factor for a pair of first and second frequencies cell is applied when comparing the signal strength measurements of the first and second frequencies in said pair.Type: GrantFiled: November 29, 2002Date of Patent: February 22, 2005Assignee: Nokia CorporationInventors: Uwe Schwarz, Sari Korpela
-
Patent number: 6788959Abstract: A method for a mobile station and a base station to which the mobile is being handed over, and corresponding apparatuses for use by the mobile and the base station. The method for use by the mobile station is for determining whether dynamic configurations are in use by the base station to which the mobile is being handed over, and the method for use by the base station is for determining whether to use a dynamic configuration (if the base station uses dynamic configurations) or to switch to a static preconfiguration in communicating with the mobile. The base station to which the mobile is being handed over is of one wireless communication system (such as the UTRA wireless communication system) and the base station doing the handing over is of another type (such as GSM). Both base stations are assumed to broadcast control signals on a respective broadcast control channel.Type: GrantFiled: October 23, 2001Date of Patent: September 7, 2004Assignee: Nokia CorporationInventors: Harri Jokinen, Sari Korpela, Jussi Numminen, Antti Toskala
-
Patent number: 6751460Abstract: A method for performing a cell reselection in a system comprised of a hierarchy of cells, wherein cells of one layer of the hierarchy have a size that differs from cells of another layer of the hierarchy. The method includes steps of (a) identifying to a user equipment a layer to which individual cells in a neighbor cell list are associated; (b) when performing neighbor cell measurements for reselection purposes, avoiding a measurement of cells in the list that are larger than a current serving cell unless a Cell Selection (S) parameter falls below a search threshold parameter (Ssearch), and is greater than zero; and (c), if S is less than or equal to zero, and no cell reselection to a better cell is in process, beginning a measurement of neighbor cells without regard for their hierarchical level. If the user equipment has made cell reselection to N different cells on the same hierarchical layer within a time Tmax, the user equipment initiates a reselection procedure for larger neighbor cells.Type: GrantFiled: December 5, 2000Date of Patent: June 15, 2004Assignee: Nokia CorporationInventors: Sari Korpela, Kaj Jansen
-
Publication number: 20040102158Abstract: Signal strength measurements for different frequencies in different cells are calibrated in a cellular communications system. The signal strength of first and second frequencies in at least one cell of a plurality of cells is repeatedly measured. A measurement history is created for said first and second frequencies in at least the one cell. Each measurement history is based on the signal strength measurements of one of the first and second frequencies in the respective one cell. The measurement histories are stored. A respective correction factor is determined for each possible pair of first and second frequencies in at least the one cell. Each correction factor is based on the stored measurement history of the first and second frequencies in the pair. The respective correction factor for a pair of first and second frequencies cell is applied when comparing the signal strength measurements of the first and second frequencies in said pair.Type: ApplicationFiled: November 29, 2002Publication date: May 27, 2004Inventors: Uwe Schwarz, Sari Korpela
-
Publication number: 20040022217Abstract: A method and system for soft handover area detection for uplink interference avoidance that includes a network device and mobile device in a communications network. A trigger criteria threshold is determined for the mobile device. The mobile device is using a downlink carrier. If a trigger criteria has risen above or fallen below the trigger criteria threshold, inter-frequency measurements of co-sited cells are performed and compared to determine if a soft handover area exists. Co-sited cells are searched for downlink carriers and reselection is initiated from the downlink carrier to a co-sited cell downlink carrier if the co-sited cell downlink carrier is useable by the mobile device. Reselection is initiated from the downlink carrier to a non co-sited cell downlink carrier if no co-sited cell downlink carrier useable by the mobile device is found. The system provides for reselection while uplink carrier interference is avoided.Type: ApplicationFiled: April 10, 2003Publication date: February 5, 2004Inventors: Sari Korpela, Jussi Numminen, Kjell Ostman, Kaj Jansen, Kari Rikkinen, Uwe Schwarz, Peter Muszynski
-
Publication number: 20040005890Abstract: A method and system for cell identification for uplink interference avoidance that includes a network device and mobile device in a communications network. Inter-frequency measurements are performed by a mobile device on a downlink carrier currently not used by the mobile device. A result of the inter-frequency measurements is compared with another value. Second measurements are initiated on the downlink carrier currently not used by the mobile device based on the comparison. A cell is identified based on the second measurements. The inter-frequency measurements may include receive signal strength indicator (RSSI) measurements, received signal code power (RSCP) measurements, or average channel power-to-total signal power ratio (Ec/Io) measurements. The second measurements may include signal quality measurements.Type: ApplicationFiled: April 24, 2003Publication date: January 8, 2004Inventors: Harri Holma, Uwe Schwarz, Peter Muszynski, Sari Korpela
-
Publication number: 20030227946Abstract: A communication method and system are provided that include providing synchronization information about a co-sited downlink carrier. This information may be transmitted to from a base station to a mobile device. The mobile device may receive this information and perform handover or measurements based on the received synchronization information.Type: ApplicationFiled: April 29, 2003Publication date: December 11, 2003Inventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela, Jussi Numminen
-
Publication number: 20030224733Abstract: A communications method and apparatus are provided for estimating signal quality (Ec/IO) for uplink interference avoidance. This may involve measuring a signal strength of a carrier and estimating a value of RSCP. A signal quality estimate may be determined based on the measured signal strength and the estimated value of RSCP. Further operations (such as handovers) may be performed based on the estimated signal quality.Type: ApplicationFiled: April 24, 2003Publication date: December 4, 2003Inventors: Uwe Schwarz, Peter Muszynski, Harri Holma, Sari Korpela
-
Publication number: 20020128035Abstract: A method for a mobile station and a base station to which the mobile is being handed over, and corresponding apparatuses for use by the mobile and the base station. The method for use by the mobile station is for determining whether dynamic configurations are in use by the base station to which the mobile is being handed over, and the method for use by the base station is for determining whether to use a dynamic configuration (if the base station uses dynamic configurations) or to switch to a static preconfiguration in communicating with the mobile. The base station to which the mobile is being handed over is of one wireless communication system (such as the UTRA wireless communication system) and the base station doing the handing over is of another type (such as GSM). Both base stations are assumed to broadcast control signals on a respective broadcast control channel.Type: ApplicationFiled: October 23, 2001Publication date: September 12, 2002Applicant: NOKIA CORPORATIONInventors: Harri Jokinen, Sari Korpela, Jussi Numminen, Antti Toskala
-
Publication number: 20010031638Abstract: A method for performing a cell reselection in a system comprised of a hierarchy of cells, wherein cells of one layer of the hierarchy have a size that differs from cells of another layer of the hierarchy. The method includes steps of (a) identifying to a user equipment a layer to which individual cells in a neighbor cell list are associated; (b) when performing neighbor cell measurements for reselection purposes, avoiding a measurement of cells in the list that are larger than a current serving cell unless a Cell Selection (S) parameter falls below a search threshold parameter (Ssearch), and is greater than zero; and (c), if S is less than or equal to zero, and no cell reselection to a better cell is in process, beginning a measurement of neighbor cells without regard for their hierarchical level. If the user equipment has made cell reselection to N different cells on the same hierarchical layer within a time Tmax, the user equipment initiates a reselection procedure for larger neighbor cells.Type: ApplicationFiled: December 5, 2000Publication date: October 18, 2001Applicant: Nokia Mobile Phones LimitedInventors: Sari Korpela, Kaj Jansen