Patents by Inventor Xuejun Cai

Xuejun Cai 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: 9912603
    Abstract: A communication system, cache, computer readable medium and method for exchanging delay-tolerant data content or in-advance data content between a user terminal and a communication network with which the user terminal communicates. The method includes storing the delay-tolerant data content or in-advance data content into a network cache of the communication network; gathering at the network cache network information related to a status of the communication network; receiving user terminal information at the network cache from a user cache located at the user terminal; and transferring the delay-tolerant data content or in-advance data content from the network cache to the user cache based on the network information and the user terminal information.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: March 6, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Attila Mihály, Xuejun Cai, Lars Westberg
  • Patent number: 9749805
    Abstract: A method and a wireless device (110) for managing a positioning method based on prediction as well as a method and a network node (120) for managing mobility patterns for use by a wireless device (110) when performing a positioning method based on prediction are disclosed. The wireless device (110) performs mobility measurements relating to mobility of the wireless device (110). The wireless device (110) estimates a position of the wireless device (110) based on prediction by using the mobility measurements and a first intra-cell pattern. The wireless device (110) detects whether the wireless device (110) is on the first intra-cell pattern or on a second intra-cell pattern, when the estimated position has reached a checkpoint of the first intra-cell pattern. The network node (120) receives information about mobility patterns. The mobility patterns comprise intra-cell patterns of cells visited by the wireless device (110).
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 29, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Xuejun Cai, Jan Christoffersson, Shunliang Zhang, Vincent Huang
  • Patent number: 9713082
    Abstract: The invention refers to providing a service associated to a service request (S1) received from a mobile user equipment—UE—(10), the communications network comprising a plurality of service nodes (21a-21h), a service control node (23) and an application server (24), wherein the service control node (23), in response to the service request, sends a request (S4) to the application server (24) to get selection assistance information with respect to the UE, receives a response (S1 1) from the application server (24) comprising selection assistance information, and selects or initiates selecting a service node (21) from the plurality of service nodes (21a-21h) in dependency of the selection assistance information. The invention further refers to a control node, an application server and to corresponding programs.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: July 18, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Shunliang Zhang, Xuejun Cai
  • Patent number: 9615319
    Abstract: A method for controlling, by a policy and charging enforcement unit, an access procedure of a mobile entity to a packet switched network via a cellular network, the mobile entity belonging to a group of mobile entities having common policy and charging rules. The method comprises the steps of receiving an attach request message to establish a group session for one of the mobile entities belonging to group, and checking whether a group subscription profile with policy and charging rules is provided in the policy and charging enforcement unit for the group, wherein if the policy and charging rules are provided in the policy and charging enforcement unit, the provided policy and charging rules are applied to the one mobile entity for which the attach request message has been received.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: April 4, 2017
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Xuejun Cai, Yuxi Shen
  • Publication number: 20170070895
    Abstract: A control plane load in a mobile network is managed. The mobile network includes a radio access network having a base station adapted for connecting to a plurality of user equipments (UEs) over a radio interface, and a core network (CN). The RAN determines a RAN control plane load, and transmits an information indicative of the RAN control plane load over a mobility management server to a policy server of the CN to initiate a traffic management in the CN based on the RAN control plane load. Related base stations, mobility management servers, and policy servers are disclosed.
    Type: Application
    Filed: February 20, 2014
    Publication date: March 9, 2017
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Shunliang ZHANG, Xuejun CAI, Zhiping LEI
  • Patent number: 9585052
    Abstract: A method for determining a traffic bearer for data traffic between a terminal (106) of a mobile network (102) and a content data source (116) of a content data network (104) is described. The method comprises sending (126) a service request for data of the content data source (116) from the terminal (106) to a network gateway (110) of the mobile network (102), and determining (132) an edge entity (108) of the mobile network (102). The edge entity (112) is adapted to forward the data traffic between the content data source (116) and the mobile network (102). The method comprises sending (130) a bearer establishment request to a control node (108) of the mobile network (102) for establishing the traffic bearer (389, 589) to the edge entity (112), and directing (154) the data traffic associated with the content data source (116) to the traffic bearer.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: February 28, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Shunliang Zhang, Xuejun Cai
  • Publication number: 20160344647
    Abstract: A communication system, cache, computer readable medium and method for exchanging delay-tolerant data content or in-advance data content between a user terminal and a communication network with which the user terminal communicates. The method includes storing the delay-tolerant data content or in-advance data content into a network cache of the communication network; gathering at the network cache network information related to a status of the communication network; receiving user terminal information at the network cache from a user cache located at the user terminal; and transferring the delay-tolerant data content or in-advance data content from the network cache to the user cache based on the network information and the user terminal information.
    Type: Application
    Filed: August 3, 2016
    Publication date: November 24, 2016
    Inventors: Attila MIHÁLY, Xuejun CAI, Lars WESTBERG
  • Publication number: 20160295448
    Abstract: Delivery of delay-tolerant data according to a predicted mobility of a user device in a network-controlled client cache architecture. A network node receives information about a predicted mobility of a user device, and monitors a network status of radio access nodes of a communication network, based on the received information about predicted mobility. Based on the monitored network status, the network node determines when, and via which radio access node, to transfer the requested data. A user device can send information about a predicted mobility of the user devices, together with information about data being requested, and receive information about when to initiate a transfer of the requested data, based on the predicted mobility of the user device. A better utilization of radio resources can be obtained.
    Type: Application
    Filed: October 29, 2013
    Publication date: October 6, 2016
    Inventor: Xuejun CAI
  • Patent number: 9438526
    Abstract: A communication system, cache, computer readable medium and method for exchanging delay-tolerant data content or in-advance data content (19) between a user terminal (12) and a communication network (14) with which the user terminal (12) communicates. The method includes storing the delay-tolerant data content or in-advance data content (19) into a network cache (18) of the communication network (14); gathering at the network cache (18) network information related to a status of the communication network (14); receiving user terminal information at the network cache (18) from a user cache (22) located at the user terminal (12); and transferring the delay-tolerant data content or in-advance data content (19) from the network cache (18) to the user cache (22) based on the network information and the user terminal information.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: September 6, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Attila Mihály, Lars Westberg, Xuejun Cai
  • Publication number: 20160219409
    Abstract: A method and a wireless device (110) for managing a positioning method based on prediction as well as a method and a network node (120) for managing mobility patterns for use by a wireless device (110) when performing a positioning method based on prediction are disclosed. The wireless device (110) performs mobility measurements relating to mobility of the wireless device (110). The wireless device (110) estimates a position of the wireless device (110) based on prediction by using the mobility measurements and a first intra-cell pattern. The wireless device (110) detects whether the wireless device (110) is on the first intra-cell pattern or on a second intra-cell pattern, when the estimated position has reached a checkpoint of the first intra-cell pattern. The network node (120) receives information about mobility patterns. The mobility patterns comprise intra-cell patterns of cells visited by the wireless device (110).
    Type: Application
    Filed: October 25, 2013
    Publication date: July 28, 2016
    Inventors: Xuejun Cai, Jan CHRISTOFFERSSON, Shunliang ZHANG, Vincent HUANG
  • Publication number: 20160150464
    Abstract: Embodiments of the disclosure provide a method, an apparatus, a wireless network node, and a computer program product for dynamically providing a CDN service at a first node through a mobile network. According to the method, service provision information is received from a second node, wherein the service provision information comprises information about at least one CDN DN for providing a CDN service requested by a UE. An inter-APN routing policy associated with the CDN service is generated based on the service provision information. The inter-APN routing policy is provided to enable the UE to access the CDN service based on the inter-APN routing policy.
    Type: Application
    Filed: June 13, 2013
    Publication date: May 26, 2016
    Inventors: Shunliang Zhang, Xuejun Cai
  • Patent number: 9338050
    Abstract: Node, computer readable medium and method for detecting a failed node in a structured network. The method includes assigning nodes of a neighboring set either to an active group or to a passive group, wherein the nodes of the neighboring set are connected to a current node; instructing active nodes in the active group to send a keep-alive query to the current node, wherein a timing for sending the keep-alive query from the active nodes to the current node is controlled by the current node; instructing passive nodes to listen for a keep-alive query from the current node and to reply with a keep-alive query response to the current node; configuring the current node to reply with a keep-alive query response to the active nodes; and determining the failed node based on (i) the keep-alive query response received from the passive nodes and (ii) the keep-alive query sent by the active nodes.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 10, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventor: Xuejun Cai
  • Publication number: 20150372933
    Abstract: A communication system, cache, computer readable medium and method for exchanging delay-tolerant data content or in-advance data content (19) between a user terminal (12) and a communication network (14) with which the user terminal (12) communicates. The method includes storing the delay-tolerant data content or in-advance data content (19) into a network cache (18) of the communication network (14); gathering at the network cache (18) network information related to a status of the communication network (14); receiving user terminal information at the network cache (18) from a user cache (22) located at the user terminal (12); and transferring the delay-tolerant data content or in-advance data content (19) from the network cache (18) to the user cache (22) based on the network information and the user terminal information.
    Type: Application
    Filed: December 16, 2011
    Publication date: December 24, 2015
    Inventors: Xuejun Cai, Attila Mihaly, Lars Westberg
  • Publication number: 20150341851
    Abstract: A method for controlling, by a policy and charging enforcement unit, an access procedure of a mobile entity to a packet switched network via a cellular network, the mobile entity belonging to a group of mobile entities having common policy and charging rules. The method comprises the steps of receiving an attach request message to establish a group session for one of the mobile entities belonging to group, and checking whether a group subscription profile with policy and charging rules is provided in the policy and charging enforcement unit for the group, wherein if the policy and charging rules are provided in the policy and charging enforcement unit, the provided policy and charging rules are applied to the one mobile entity for which the attach request message has been received.
    Type: Application
    Filed: June 25, 2012
    Publication date: November 26, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventors: Xuejun CAI, cn SHEN
  • Publication number: 20150289203
    Abstract: The invention refers to providing a service associated to a service request (S1) received from a mobile user equipment—UE—(10), the communications network comprising a plurality of service nodes (21a-21h), a service control node (23) and an application server (24), wherein the service control node (23), in response to the service request, sends a request (S4) to the application server (24) to get selection assistance information with respect to the UE, receives a response (S11) from the application server (24) comprising selection assistance information, and selects or initiates selecting a service node (21) from the plurality of service nodes (21a-21h) in dependency of the selection assistance information. The invention further refers to a control node, an application server and to corresponding programs.
    Type: Application
    Filed: November 13, 2012
    Publication date: October 8, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Shunliang Zhang, Xuejun Cai
  • Publication number: 20150138948
    Abstract: Node, computer readable medium and method for detecting a failed node in a structured network. The method includes assigning nodes of a neighboring set either to an active group or to a passive group, wherein the nodes of the neighboring set are connected to a current node; instructing active nodes in the active group to send a keep-alive query to the current node, wherein a timing for sending the keep-alive query from the active nodes to the current node is controlled by the current node; instructing passive nodes to listen for a keep-alive query from the current node and to reply with a keep-alive query response to the current node; configuring the current node to reply with a keep-alive query response to the active nodes; and determining the failed node based on (i) the keep-alive query response received from the passive nodes and (ii) the keep-alive query sent by the active nodes.
    Type: Application
    Filed: March 27, 2012
    Publication date: May 21, 2015
    Inventor: Xuejun Cai
  • Publication number: 20150049612
    Abstract: A method for determining a traffic bearer for data traffic between a terminal (106) of a mobile network (102) and a content data source (116) of a content data network (104) is described. The method comprises sending (126) a service request for data of the content data source (116) from the terminal (106) to a network gateway (110) of the mobile network (102), and determining (132) an edge entity (108) of the mobile network (102). The edge entity (112) is adapted to forward the data traffic between the content data source (116) and the mobile network (102). The method comprises sending (130) a bearer establishment request to a control node (108) of the mobile network (102) for establishing the traffic bearer (389, 589) to the edge entity (112), and directing (154) the data traffic associated with the content data source (116) to the traffic bearer.
    Type: Application
    Filed: March 27, 2012
    Publication date: February 19, 2015
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Shunliang Zhang, Xuejun Cai
  • Patent number: 8908638
    Abstract: The present invention relates to a method for handover of a mobile terminal from a first network to a second network, a network element, a mobile terminal, a base station and a communications system as well as a computer program product and a storage medium. The method comprises the steps of: determining a WDP including an unnecessary handover probability and a missing handover probability according to conditions of the first network and the second network; detecting at least of the following: whether the unnecessary handover probability is greater than the missing handover probability, whether the unnecessary handover probability is greater than a specific threshold and whether the missing handover probability is smaller than a specific threshold; and making a handover decision based on the detection result. The present invention can select a more suitable target network for handover at a more suitable time, thus ensuring the continuity of a mobile user's call.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: December 9, 2014
    Assignee: Alcatel Lucent
    Inventors: Caixia Chi, Christine Liu, Ruibing Hao, Xuejun Cai
  • Patent number: 8811170
    Abstract: The invention relates to a method for controlling the maximum bit rate for a bearer used for data transmission over a packet-switched network using a specified access point for a group of mobile entities. A PDN gateway enforces the maximum bit rate for the group, the APN group AMBR. This is possible as all mobile entities belonging to said group are connected to the same PDN gateway for a certain access point name APN. This is obtained by providing a PDN gateway information into an update location acknowledgement message sent from the HSS to the MME.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: August 19, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Xuejun Cai, Yuxi Shen
  • Patent number: 8718075
    Abstract: Method and network nodes for adapting policy control function, wherein a load of a first network entity on which a policy execution function like a policy and charging enforcement function (PCEF) or a bearer binding and event reporting function (BBERF) is located is monitored (S4) and policy decisions are adapted based on said load. Particularly, the load may be reported to (N) or determined by a second network entity on which a policy supervision function like a policy and charging rules function (PCRF) is located, and said second network entity adapts policy decisions based on said load. When making policy decisions, the load status of a network entity like a gateway may thus be taken into account in addition to other factors.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: May 6, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Xuejun Cai, Yuxi Shen, Xiuyong Zhang