Patents Represented by Attorney, Agent or Law Firm Sandra Beauchesne
  • Patent number: 7120156
    Abstract: The invention relates to policy information transfer in 3GPP networks. A Policy Decision Point (PDP) that deals with more than one Policy Enforcement Point (PEP) has a table associating IP addresses with PEPs so that it knows what PEP to send the policy information to. The invention also provides methods for keeping the table updated and transferring the information to the right PEP, and a protocol that is used for messages from the PEP to the PDP.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: October 10, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: George Foti, Sorin Surdila
  • Patent number: 7061887
    Abstract: A system, method and node for supporting multiple IP sessions with dynamically allocated home IP addresses in a CDMA2000 network. When the Home Agent (HA) receives a registration request from a Mobile Node (MN), it verifies if there are any mobility bindings for the MN. If yes, the HA verifies if the MN's care-of address equals one it already stores. If not, the HA verifies if the home IP address in the request is zero, and if no refreshes the mobility binding. However, if the IP address is zero, the HA verifies if the MN has reached its session number limit, and if so, the HA keeps only the first session and removes the others, but if no, the HA creates a new mobile IP session. The proper home IP address is the returned to the MN.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: June 13, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Xiaobo Fan
  • Patent number: 6999435
    Abstract: The present invention relates to a method, system and node for providing enhanced mobility in Simple IP telecommunication networks when performing L2TP tunneling. A mobile station establishes a connection with a first service node in the telecommunication network. This connection is then extended from the first service node to an endpoint, or terminal node, in the telecommunication network. Upon an establishment of a connection between the mobile station and the terminal node via the first service node, a unique address is assigned to the mobile station at the terminal node. Upon roaming of the mobile station from the coverage area of the first service node to that of a second service node in the telecommunication network, continuous connectivity is ensured between the mobile station and the terminal node by establishing a new connection between the mobile station and the second service node, and extending the established new connection from the second service node to the terminal node.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: February 14, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Michelle Perras
  • Patent number: 6999501
    Abstract: The method and device attenuate an interferer of substantially known spectrum in a communication signal which has been transmitted through a transmission channel and processed through a signal-processing receiver chain. In these method and device, the substantially known spectrum is used to generate, independently of the communication signal, at least one image representative of a replica of the interferer after processing through the signal-processing receiver chain. The generated image is subtracted from the processed communication signal to produce a subtraction signal, and quality-indicative parameters of the processed communication signal and the subtraction signal(s) are calculated. Finally, the quality-indicative parameters are used to select one of the processed communication signal and subtraction signal(s) for further processing through the receiver. When a plurality of images are generated, these images have different features, for instance different amplitudes or phases.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: February 14, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Francois Sawyer
  • Patent number: 6745012
    Abstract: A method and system for performing adaptive compression in a wireless communication network includes monitoring a link quality of a signal transmitted via an air interface using, for example, a telecommunications node. Next, it is determined whether the link quality deteriorates below a first link quality threshold. A compressor associated with the transmitted signal is disabled in response to a determination that the link quality has deteriorated below the first link quality threshold.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: June 1, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bobby That Dao Ton, Guy Côté
  • Patent number: 6731598
    Abstract: An interfacing method and Virtual Internet Protocol (VIP) Framework that provides high fault tolerance and linear scalability of servers and network interfaces. The Framework has minimal impact on the surrounding network infrastructure. The preferred embodiment operates at the IP level, thus enabling the Framework to operate with any application that runs on top of IP. Incoming data packets and packet fragments are received from the Internet in a plurality of network terminations. Routing processes provide external routers with addresses of the network terminations. Each network termination is associated with one of a plurality of forwarding processes, and each forwarding process is connected to a plurality of fragmenter/de-fragmenters. Each forwarding process selects a single fragmenter/de-fragmenter to receive all of the incoming data packets and packet fragments having a common source address.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: May 4, 2004
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: André Béliveau, Per Andersson, Anders Franzen, Lars Hennert
  • Patent number: 6714515
    Abstract: A Radio Network Server (RNS) is modified to function as a policy server providing radio network resource allocation rules in an integrated third generation wireless IP network. The RNS determines a level of availability of radio network resources, and determines whether the level is sufficient to satisfy requests for resources in accordance with policy rules. The RNS informs a Bandwidth Broker (BB) whether the radio network resources are available. The BB functions as a Policy Decision Point (PDP) for its domain, and either allows or denies requests from users for network resources based on the input from the RNS. A plurality of edge routers in each domain interface with the BB utilizing the Common Open Policy Service (COPS) protocol interface. The edge routers function as Policy Enforcement Points (PEPs) for their domain to enforce policy decisions made by the BB. The BB may interface with BBs in other domains for calls that span multiple domains.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: March 30, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Laurent Marchand
  • Patent number: 6654606
    Abstract: A Call State Control Function (CSCF) and method of processing a call to a called mobile station (MS). The method is performed in all of the CSCFs in a third generation Internet Protocol (3G.IP) network. When an incoming call setup message such as a Fast Setup or Location Request message is received in the CSCF, the CSCF first determines with a relationship function, whether the CSCF is the Home CSCF for the called MS. If so, a first set of call processing steps are performed. If the CSCF is not the Home CSCF, the CSCF determines if it is currently serving the called MS. If the CSCF is the Serving CSCF, a second set of call processing steps are performed. If the CSCF is neither the Home CSCF nor the Serving CSCF for the called MS, a third set of call processing steps are performed.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: November 25, 2003
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: George Foti, Sorin Surdila
  • Patent number: 6631128
    Abstract: Routing nodes that are interconnected within a communications network are not configured to utilize a single type of switching technology in the context of a single type of networking topology. Responsive to data input and the operation of an expert system, the routing nodes are configured to implement a certain switching technology type and networking technology type, and thus optimize portions of the communications network to handle different types of traffic. Traffic of the various different types may then be efficiently handled through the network by its correspondingly optimized portion.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: October 7, 2003
    Assignee: Telefonaktiebolaget L M Ericcson (publ)
    Inventor: Yves Lemieux
  • Patent number: 6625461
    Abstract: A method and system for increasing compatibility among telecommunications networks using different types of signaling systems. Current location information for a mobile station is stored in a register. Subsequently, a telecommunication node attempting to access the mobile station requests current location data from the register. It is determined, however, that the stored location information is incompatible with a signaling system used by the telecommunication node. As a result, a physical address that corresponds to the stored location information is identified as being compatible with the signaling system. The identified physical address is then used to perform the access of the mobile station. In accordance with one embodiment of the invention, the attempted access of the mobile station is for purposes of delivering a short message service (SMS) message. In another embodiment, the attempted access comprises an attempt to set up an international call connection.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: September 23, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Luciano Bertacchi
  • Patent number: 6606502
    Abstract: In a cellular telecommunications network, a method and system allowing a Message Center (MC) to receive an indication of the periodic broadcast SMS capability of co-operating Mobile Switching Centers (MSCs) when a periodic broadcast SMS is initiated. According to the invention, when a periodic broadcast SMS request is sent from an MC to one MSC for broadcast to the Mobile Stations (MSs), the MSC detects its own capability to handle the periodic broadcast SMS request. Therefore, an indication of the MSC's capability is sent back to the MC. If the MSC accepts to handle the periodic broadcast SMS request on its own, the MSC records the message and periodically broadcasts it to the destination MSs. If not, the MC periodically sends a regular broadcast SMS request along with an instruction for delivery to the MSC, which in turn forwards the SMS body message to the destination MSs.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: August 12, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Georges Chung Kam Chung, Walter Cigana
  • Patent number: 6594492
    Abstract: In the context of a completed inter-exchange handoff of a mobile station communication, an anchor exchange may request certain call related information from a currently serving exchange. This request is made through use of an inter-exchange information request message issued from the anchor exchange and sent (perhaps through one or more tandem exchanges) to the serving exchange. Responsive thereto, the serving exchange processes the request, obtains the requested call related information, and returns the requested information in an inter-exchange information request return result message. The information request message may comprise a newly defined ANSI-41 message, a vendor proprietary extension to the ANSI-41 message set, or an enhancement to an existing ANSI-41 message.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: July 15, 2003
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Felix Choi, Michel Houde, Sorin Surdila
  • Patent number: 6584312
    Abstract: A system, method, and apparatus for providing subscriber services to a mobile terminal are provided. The mobile switching centers (MSCs) transmit an MSC capabilities message which informs the Home Location Register (HLR) of the services the MSC supports. When a mobile terminal roams to a particular MSC, the HLR compares the subscriber profile and the MSC capabilities message to determine whether the MSC can support a particular subscriber service. Where the MSC cannot support a particular subscriber service, the HLR determines a comparable service which the MSC does support and modifies a copy of the subscriber profile to include the comparable service as a replacement for the subscriber service that is not supported.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: June 24, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stephane Morin, Steven Rochefort
  • Patent number: 6567656
    Abstract: Control is exercised over a tap connection made for law enforcement agency monitoring of mobile station communications in response to an inter-exchange hand-off. Where such a tap connection does not yet exist at hand-off, pre-hand-off actions taken at the target exchange trigger an analysis of whether a party to that communication is marked for monitoring followed by an establishment of the tap connection at hand-off if the party is so marked. If the tap connection is already in place, pre-hand-off actions taken at the target exchange trigger an analysis of whether law enforcement agency monitoring of that communication is lawfully authorized with respect to the target exchange followed by instructing the anchor exchange to terminate the tap connection at hand-off if monitoring is not lawfully authorized.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: May 20, 2003
    Assignee: Telefonaktiebolaget L M Ericssson (publ)
    Inventors: Patrice Varinot, Michel Houde
  • Patent number: 6567657
    Abstract: A method and system for automatically adjusting charges to a pre-paid account in a telecommunications or distributed processing network following a failure in the network. After a service that is chargeable against the pre-paid account is initiated in the network, a failure in the network is detected. The failure prevents a charging node from receiving event data relating to the pre-paid account. After recovery from the failure, a message is sent to the charging node containing service status information. The charging node adjusts the account balance in accordance with the service status information.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: May 20, 2003
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventors: Gerald Holly, Akilan Tiburtius, Arturo Vega, Hanh Duy Vo, Nadia Bishai, Jacques Bugnon, David Strickland
  • Patent number: 6463055
    Abstract: An integrated radio telecommunications network which integrates an ANSI-41 circuit switched network and a General Packet Radio Service (GPRS) packet data network to support a mobile station which operates in both the ANSI-41 network and the GPRS network. An interworking function interfaces a mobile switching center (MSC) in the ANSI-41 network with a serving GPRS switching node (SGSN) in the GPRS network by mapping circuit switched signaling utilized by the MSC into GPRS packet switched signaling utilized by the SGSN, and mapping GPRS packet switched signaling into circuit switched signaling. An interworking GPRS base station controller interfaces the SGSN with a GPRS/ANSI-136 base station which supports both ANSI-136 operations and GPRS operations. The interworking GPRS base station controller adapts the traffic signaling format utilized by the SGSN into an air interface traffic signaling format utilized by the GPRS/ANSI-136 base station.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: October 8, 2002
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Francis Lupien, Paul Lee, John Diachina, Gunnar Rydnell, Gunnar Thrysin
  • Patent number: 6424832
    Abstract: A method of supporting functionality for roamer port calls in a radio telecommunications network in which Number Portability (NP) is implemented, the network having a plurality of mobile switching centers (MSCs) and home location registers (HLRs). The network includes a roamer port MSC having a roamer port which is shared with at least one neighboring MSC. A number portability database (NPDB) associates a location routing number (LRN) with each distinct MSC/HLR pair in the network. When a roamer port call, which includes the mobile directory number (MDN) of the called mobile station, is received in the roamer port MSC, the roamer port MSC determines whether the MDN falls within a ported range. If so, a request is sent to the NPDB to retrieve a LRN for the called mobile station. From the LRN, a HLR associated with the mobile station is identified.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: July 23, 2002
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Margaret Britt, Jacques Bugnon
  • Patent number: 6418317
    Abstract: The present invention is a method and system for managing frequencies allocated to a cell within a cellular network to assign certain ones of those allocated frequencies for use by channel equipment within that cell. The method measures at least one quality metric for each of the allocated frequencies. At least one measured quality metric for the unassigned frequencies are compared against at least one quality metric for the assigned frequencies. An unassigned frequency is swapped for an assigned frequency based upon the comparison step. Additionally, a voting step is used to indicate that either the unassigned frequency or the assigned frequency has a higher signal quality for communication.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: July 9, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Angelo Cuffaro, Michel Desgagné, Arne Simonsson
  • Patent number: 6408173
    Abstract: A method and apparatus for generating a billing identifier for a subscriber from a first network roaming within a second network is disclosed. A node interconnecting the first and second networks receives a call message that does not include a billing identifier from the first network. A billing functionality within the node responsive to the call message generates a billing identifier enabling billing records within the second network to be associated with the subscriber from the first network. Messages containing the billing identifier are then transmitted to the second network from the interconnecting node.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: June 18, 2002
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Andre Bertrand, Steven Rochefort, Philippe Belanger
  • Patent number: 6397056
    Abstract: A system and method of reducing control message signaling load in a radio telecommunications network. When an authentication request is issued by the mobile switching center (MSC), the home network performs authentication of the visiting subscriber. When authentication fails the home network determines if a threshold value is reached. If so, a suitable authentication code portion is included in the return message so that local authentication of the visiting subscriber may be performed. The MSC is able to locally authenticate a visiting subscriber trying to access the network thereby suppressing the transmission of additional authentication requests and failure reports to the home network. For failed authentications, the VLR transmits authentication failure reports to the home network. If a threshold value is reached the MSC locally authenticates the mobile subscriber's subsequent attempts so that the VLR is precluded from sending additional authentication failure reports to the home network.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: May 28, 2002
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jacques Bugnon, Binh Nguyen