4148 results about "Mobility management" patented technology

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. An interface-based listener uses network point of attachment information supplied by a network interface to determine roaming conditions and to efficiently reestablish connection upon roaming. The Mobility Management Server can distribute lists to Mobile End Systems specifying how to contact it over disjoint networks.

A system and method of providing an integrated wireless telecommunications network including a cellular network portion and a packet-switched network portion. The cellular network portion provides legacy mobile telecommunications functionality to mobile subscribers. The packet-switched network portion is provided for transporting communication traffic, wherein the communication traffic comprises traffic originated from a mobile subscriber, traffic intended for a mobile subscriber, or both. The network also includes a gateway disposed between the cellular network portion and the packet-switched network portion for providing a communication path therebetween. An interworking interface module is provided between the cellular network portion and the packet-switched network portion. The interworking interface module preferably comprises a mobility gateway and an IP client (or proxy), wherein the mobility gateway handles mobility management information and the translation of control signaling information between the cellular network portion and the packet-switched network portion. The IP client handles communication traffic with one or more associated servers disposed in the PSN with respect to, e.g., mobility management, security / authentication, and subscriber services of the mobile subscriber.

Disclosed are a method and apparatus for determining a PDU session identity in a wireless communication system. A method for determining, by a session management function (SMF) node, a packet data network (PDU) session identity during handover of user equipment (UE) in a wireless communication system, may include receiving a request message for requesting the establishment of a PDU session for the UE from an access and mobility management function (AMF) node, wherein a handover for the UE from a first wireless communication system to a second wireless communication system has been determined, determining a PDU session identity for the PDU session established for the UE when the request message is received, and sending a response message including the determined PDU session identity to the AMF node in response to the request message.

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. The solution extends the enterprise network, letting network managers provide mobile users with easy access to the same applications as stationary users without sacrificing reliability or centralized management. The solution combines advantages of existing wire-line network standards with emerging mobile standards to create a solution that works with existing network applications. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. In one example, Mobility Management Server communicates with Mobile End Systems using Remote Procedure Call and Internet Mobility Protocols.

A method for managing mobility of a terminal in a heterogeneous network environment is provided. According to an aspect, there is provided an operation method of a terminal receiving parameters for Coordinated Multi-point transmission / reception (CoMP) operation in a heterogeneous network environment, the operation method including, at the terminal, receiving at least one parameter among a CoMP operation mode parameter, a time information parameter regarding a time at which the CoMP operation starts, a point information parameter about points that participate in the CoMP operation, and a CoMP operation parameter, from a base station, through a layer-3 message. Therefore, it is possible to avoid an unnecessary ping-pong handover and efficiently provide service continuity.

Communications of a mobile station with a satellite mobile communications system and a terrestrial mobile communications system are coordinated. The mobile station is registered with the terrestrial mobile communications system and, responsive to the registration of the mobile station with the terrestrial mobile communications system, the mobile station is concurrently registered with the satellite mobile communications system. The concurrent registration may include implicitly registering the mobile station with the satellite mobile communications system, e.g., by storing information identifying the mobile station may be stored in a location register of the satellite mobile communications system responsive to the registration of the mobile station with the terrestrial mobile communications system, and maintaining synchronization between the two registrations. Authentication tokens may be pre-generated for quick re-registration with a satellite mobile communications system.

There are provided a communication device using a millimeter-wave frequency band and a communication method using the millimeter-wave frequency band. The communication device includes a beam scheduling unit configured to schedule uplink and downlink beams corresponding to movement of a terminal, a core network interface unit configured to transmit data provided from the beam scheduling unit to a core network, and to provide data received from the core network to the beam scheduling unit, a mobility management unit configured to configure an uplink and downlink beam set based on inter-beam interference information provided from the beam scheduling unit, and an inter-base station interface unit configured to exchange a control message with another base station under control of the mobility management unit. Therefore, it is possible to efficiently build a cellular network using the millimeter-wave frequency band.

A session controller provides mobility management support in a 1xEVDO wireless communication network, such as one configured in accordance with the TIA / EIA / IS-856 standard. Operating as a logical network entity, the SC maintains location (e.g., a pointing tag) and session information at an access network controller (ANC) granularity, thus allowing it to track access terminal (AT) transfer between ANCs but within subnet boundaries, where a network subnet comprises one or more ANCs. This allows a packet control function (PCF) to maintain location information at a packet zone granularity, thereby reducing mobility management overhead at the PCF. The SC provides updated tag and session information to PCFs, ANCs, and other SCs as needed. Information exchange with other SCs arises, for example, when two or more SCs cooperate to maintain or transfer routing and session information across subnets.

The invention discloses a wireless communication system and a mobile management method. And the wireless communication system comprises first wireless network and second wireless network, where the location area marks broadcasted by the first and second wireless networks are the same, and received by mobile terminal so as to make the mobile terminal in idle mode not initiate any location updating flow when roaming between the first and second wireless networks; and the configuration information of at least one support node of the core networks of the first and second wireless networks is set with information of expressing preferred network.

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. An interface-based listener uses network point of attachment information supplied by a network interface to determine roaming conditions and to efficiently reestablish connection upon roaming. The Mobility Management Server can distribute lists to Mobile End Systems specifying how to contact it over disjoint networks.

Methods and apparatus for providing a hierarchical mobility management function for routing packets to mobile nodes are provided. The hierarchical mobility management function may be placed anywhere within the network and provide efficient use of IPv6 addresses. A node implementing the hierarchical mobility management function receives packets intended for the mobile node and routes the packets to the mobile node's current address. Load sharing of packets intended for a mobile node may be implemented across several access routers. Additional, bi-casting of packets is provided to allow for seamless handoff of the mobile node as it switches from one access router to another access router.

A gateway cluster has a number of gateways for different types of communication protocols. The respective gateways convert network messages to normalized messages by querying the categories, data, and network types of the normalized data for the mobile systems from which the network messages were generated. A database system stores normalized data in categories. The normalized data include data relating to the mobile systems and network types for the data. A unified mobility manager is coupled to and in communications with the gateway cluster and the database system. The unified mobility manager receives and processes the normalized messages, performs operations based on the normalized messages and on the categories, the data, and the network types of the normalized data, and formulates normalized responses responsive to the normalized messages. The normalized responses are converted to network responses at the gateways, and the network responses are sent to the respective mobile systems.

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. An interface-based listener uses network point of attachment information supplied by a network interface to determine roaming conditions and to efficiently reestablish connection upon roaming. The Mobility Management Server can distribute lists to Mobile End Systems specifying how to contact it over disjoint networks.

A method and apparatus for providing a local IP access service to a User Equipment (UE) attached to a femtocell including a Packet Data Network (PDN) gateway function in a wireless communication system. A method includes receiving a service request from a User Equipment (UE), transmitting an initial UE message including information on a local gateway to a Mobility Management Entity (MME), storing bearer information carried in an initial context setup request transmitted by the MME, receiving a Packet Data Network (PDN) connectivity request from the UE, forwarding the PDN connectivity request to the MME, receiving a create session request from the MME, and establishing a radio bearer with the local gateway, the local gateway being co-located with the femtocell.

When performing load balancing in a wireless extended self-organizing network (extended SON), network health status is monitored by collecting network measurement data and identifying network nodes that require policy adjustment. Based on the network measurement data, network and / or user policies are automatically adjusted and policy updates are disseminated by a policy and charging rule function module to a packet gateway (PGW) as well as to one or more non-PGW network nodes (e.g., base stations, mobility management entity (MME) nodes, radio network controller (RNC) nodes, and the like). The automated policy updates are locally enforced at the nodes that receive the updates, rather than solely at the PGW node.

Integrated mobility management mechanisms monitor a mobile host's degree of mobility and the applications it executes. Mobile hosts move between wireless-access, micro-mobility domains interconnected through a backbone network. While the mobile host is stationary, MIP-LR and SIP systems operate to ensure TCP and RTP / UDP packets, respectively, traveling to / from the mobile host are properly routed through the backbone to the host's current domain. An MMP system routes packets through this domain. As the host moves within a domain, the MMP system updates the domain routing to the mobile host's new location. As the mobile host moves between domains, the host obtains a new IP address and the MMP system establishes routing within the new domain to the mobile host's new location. In addition, the MIP-LR and SIP systems activate to ensure the TCP and RTP / UDP packets, respectively, are automatically re-routed through the backbone to the new domain.

The invention relates to methods for (re)attaching a UE to a 3GPP access network and for storing bearer context information of a UE upon handover from a 3GPP access network to a non-3GPP access network. Furthermore, the invention relates to 3GPP network nodes, such as mobility management entity, serving gateway and packed data gateway, and a UE that are specially adapted to perform these methods. In order to decrease of the delay time during (re)attachment of a UE to a 3GPP access network, the invention proposes to maintain context information on data bearer(s) of a UE within the 3GPP access network and the UE, while the UE is not attached to the 3GPP access network, so that data bearer context information for this UE is available and can be used for the (re)activation of data bearer(s) once the UE is attaching to the 3GPP access network again.

A method of filtering data packets in General Packet Radio Service (GPRS) Tunneling Protocol (GTP) signaling messages. Selected messages from GTP Path Management, GTP Tunnel Management, GTP Mobility Management, and GTP Location Management messages are analyzed against a plurality of filtering criteria, and data packets that do not meet the filtering criteria are dropped while data packets that meet the criteria are passed. The data packets may be analyzed to verify that they contain correct source, destination, and mask addresses, and that they contain UDP / TCP port numbers that are consistent with the GTP version number. The packets are also inspected at the GTP level, layer-5, and based on the GTP version, information in the GTP header, and accompanying Information Elements (IEs), selected data packets are dropped.

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. An interface-based listener uses network point of attachment information supplied by a network interface to determine roaming conditions and to efficiently reestablish connection upon roaming. The Mobility Management Server can distribute lists to Mobile End Systems specifying how to contact it over disjoint networks. Architectures are provided for bridging between IPv4 and IPv6 Internet Protocols.

Embodiments of a wireless mobility manager and its method of operation are described. In one embodiment, the method includes a wireless station that automatically scans a current communication range to identify a first group of wireless access points. In one embodiment, scanning is performed if a signal strength of a current wireless connection to a wireless access point falls below a user selected scan threshold. Subsequently, the wireless device automatically establishes a wireless connection with a selected wireless access point from the first group of wireless access points. In one embodiment, the wireless connection is established once the current signal strength of the current wireless connection falls below a user selected switch threshold. Alternatively, the wireless station may determine quality of service (QoS) characteristics of the first group of wireless access points to select an access point.

A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. The solution extends the enterprise network, letting network managers provide mobile users with easy access to the same applications as stationary users without sacrificing reliability or centralized management. The solution combines advantages of existing wire-line network standards with emerging mobile standards to create a solution that works with existing network applications. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. In one example, Mobility Management Server communicates with Mobile End Systems using Remote Procedure Call and Internet Mobility Protocols.

A messaging service subscriber caching (MSSC) function caches mobile subscriber location information obtained from intercepted mobility management signaling messages. The MSSC function intercepts messaging service messages that are destined for a messaging service center and performs a first delivery attempt using the cached subscriber location information.

The invention discloses a terminal transfer method. The method of the invention comprises the steps that: a mobile management entity monitors the time of a terminal staying in a home base station which belongs to a current internal subscriber group; when the time of the terminal staying in the home base station exceeds the preset time threshold, if the terminal and the home base station are in a connection state, the mobile management entity sends a request of switching to the home base station which is connected with the terminal to request the terminal to be switched to a target base station and carries the identifier of the terminal in the request of switching. The invention also discloses a mobile transfer system and the mobile management entity. By adopting the invention, the terminal in the current CSG is transferred to a base station which does not belong to the current CSG, thus resulting in that the normal operation of subscriber services can be guaranteed; the perception and the experience of subscribers can be improved for benefiting operators to maintain customers.

This disclosure describes a method to provide stateful geographic redundancy for the LTE MME (Mobility Management Entity) function of the 3GPP E-UTRAN Evolved Packet core (EPC). The method provides MME many-to-one (“n:1”) stateful redundancy by building upon the S1-Flex architecture, which enables a MME Pool Area to be defined as an area within which a UE (User Equipment) may be served without need to change the serving MME. Geographic redundancy is achieved by utilizing a standby MME node deployed to backup a pool of MME nodes, with the standby MME node designed to handle the large volume of journaling or synchronization messages from all the MME nodes in the pool. The standby MME node takes over the personality and responsibility of any MME node in the pool that has failed, with minimal impact to subscribers that were being served by that failed MME node.

A Multi-Interface Mobility Management (MIMM) client is provided on a mobile Multi-Interface Device (MID) to support seamless network connectivity and switching of the MID. The MIMM client communicates with a MIMM Server. The MIMM Server collects information from MIMM Clients and provides information to the MIMM Clients pertaining to the network(s) to which the mobile MID has access, such as information concerning the availability of a network, the quality of network connectivity, etc. The MIMM Client is responsible for determining whether and when a handoff or roaming operation should be initiated by the mobile MID, and which network interface the mobile MID should use after the handoff / roam operation has been completed. The MIMM Client also is responsible for performing mobility-related functions that are required prior and subsequent to the handoff / roam operation. The MIMM Client uses the information received from the MIMM Server in order to make these determinations.

Disclosed herein are a method and apparatus for monitoring UE reachability in a wireless communication system. A method for monitoring UE reachability may include receiving, by a Mobility Management Entity, a monitoring request message for UE reachability including a maximum response time from a Home Subscriber Server, detecting, by the MME, the UE reachability if it is expected that paging is able to be transmitted to UE when extended Discontinuous Reception is applied to the UE, and sending, by the MME, a UE reachability notification to a Service Capability Exposure Function before a next paging occasion of the UE, wherein the maximum response time may indicate a time during which the UE maintains a reachable state so that downlink data is reliably delivered to the UE, and wherein an occasion when the UE reachability notification is transmitted may be determined by taking into consideration the maximum response time.

It is disclosed a method of adjusting mobility management in a mobile communication network, said mobile communication network comprising a mobility control unit (4; 40; 320) adapted to track location of communication units (1; 10; 310) communicating in said mobile communication network and to control the mobility management for said communication units. Mobility information related to a communication unit is provided (S1) to said mobility control unit, which evaluates (S2) the degree of mobility of said communication unit from said mobility information related to said communication unit. On the basis of said evaluated degree of mobility, mobility management elements used for mobility management of said communication unit in said mobile communication network are correspondingly adjusted (S3). Furthermore, there are disclosed a corresponding mobility control unit, a corresponding communication unit as well as a corresponding mobility management adjustment system.

A system and method for allocating an S-TMSI in a telecommunication system. The System includes a UE operating within a tracking area of a Public Land Mobile Network. A Mobility Management Entity controls allocation of the S-TMSI to the UE. The S-TMSI has a 32-bit structure with a discriminator for discriminating Circuit Switched, CS, services and Packet Switched, PS, services utilized by the UE. The discriminator utilizes the two significant bits to indicate the CS or PS services.