Class / Patent application number | Description | Number of patent applications / Date published |
455441000 | Based upon unit velocity | 33 |
20090069016 | Network and Cell Selection and Reselection for Long-Term Evolution Inter-Radio Access Network Based on Long-Term Evolution Mobility Driver Grouping - A system is provided for selecting a cell to which to hand off a user equipment (UE). The system includes a processor programmed to promote evaluation of a plurality of mobility drivers for one or more neighbor cells of a cell serving the UE (user equipment). The processor programmed to promote evaluation of a plurality of groups of mobility drivers based on the evaluations of the mobility drivers, wherein the UE is handed off to one of the cells based on the groups of mobility drivers that are evaluated positively. | 03-12-2009 |
20090191878 | Handover for a portable communication device between wireless local and wide area networks - The present invention relates to a method, call handling server ( | 07-30-2009 |
20100136978 | METHOD FOR HANDOFF OF PORTABLE TERMINAL BETWEEN HETEROGENEOUS WIRELESS NETWORKS - When a receive signal strength received from a target network that will perform the handoff is larger than a reference strength, software related to the target network is previously installed in the corresponding portable terminal, a wireless connection environment with the target network is configured by driving the software related to the target network at the time of determining that the handoff is performed, and performs the handoff to the target network in the portable terminal. | 06-03-2010 |
20100298001 | Speed-Dependent Adaptation of Mobility Parameters with Dual Speed Measurement - Mobility parameters, such as those used in handoff decisions, are based on the speed of User Equipment (UE) ( | 11-25-2010 |
20120252463 | METHOD FOR DETERMINING A LOCATION OF A MOBILE UNIT USING A SYSTEM REFERENCE TIME MAINTAINED BY THE MOBILE UNIT - The present invention provides a method of determining the location of a mobile node. Embodiments of the method may include comparing, at the mobile node, a local timing reference maintained by the mobile node to arrival times of signals transmitted by two or more base stations to determine two or more distances between the mobile node and the base stations. Embodiments of the method may also include determining, at the mobile node, a location of the mobile node using the distances and locations of the base stations. | 10-04-2012 |
20130005344 | USER EQUIPMENT, RADIO BASE STATION AND METHODS THEREIN FOR DETERMINING MOBILITY TRIGGER - A method in a user equipment for enabling a cell change of a connection of the user equipment from a first cell serving the user equipment to a second cell in a radio communications network includes obtaining a first cell size of the first cell and obtaining a second cell size of the second cell. The method also includes determining a mobility trigger to use based on at least the first cell size and/or the second cell size and determining whether a cell change is to be performed based on the mobility trigger. | 01-03-2013 |
20130079017 | PROVIDING A MOBILITY STATE FOR A MOBILE DEVICE - In response to a transition of a mobile device from a first wireless access network to a second wireless access network, a mapping is applied to obtain a particular mobility state of the mobile device to use in the second wireless access network, where the mapping outputs the particular mobility state in response to information associated with mobility of the mobile device in the first wireless access network. | 03-28-2013 |
20130079018 | Handover Preparation - There are provided measures for proximity reporting procedures in radio access, for example in heterogeneous network environments, said measures exemplarily including sending, to a serving base station representing a source of mobility of a user equipment, a first proximity indication indicating proximity to a microcell base station representing a target of mobility of said user equipment, said first proximity indication including a carrier according to a preceding access of said user equipment to the microcell base station, and, when detecting the microcell base station on said carrier according to the preceding access fails, sending, to the serving base station, a second proximity indication indicating proximity to the microcell base station, said second proximity indication including a carrier being different from said carrier according to the preceding access. Said measures may exemplarily be applied for mobility procedures in LTE, LTE-Advanced, HSPA and/or UMTS radio access systems. | 03-28-2013 |
20130130698 | INDICATION OF USER EQUIPMENT MOBILITY STATE TO ENHANCE MOBILITY AND CALL PERFORMANCE - A user equipment UE reports its mobility state in signaling for establishing, re-establishing, or re-configuring a radio connection between the UE and a network access node. In one embodiment the reported mobility state is selected from among normal; medium and high. In another embodiment the reported mobility state informs of a number of cell changes the UE has performed within a predetermined evaluation period. The UE may also include an indication whether a hysteresis period for entering into a normal mobility state is running for the UE. The network configures the UE in dependence on the reported mobility state, such as setting a parameter for measuring or reporting neighbor cells (e.g., suspend a serving cell quality threshold as a condition for measuring/reporting; limit inter-frequency and/or inter-radio access technology reporting; set a shortest measurement, reporting gap; disable an event trigger; and/or set layer 3 filtering of measurement results for faster reporting). | 05-23-2013 |
20130171995 | MOBILE COMMUNICATION METHOD - A radio terminal UE according to one embodiment includes a radio communication unit | 07-04-2013 |
20130210443 | Mobility in Heterogeneous Network Environments - There are provided measures for mobility in heterogeneous network environments, said measures exemplarily including configuring, at a network entity, and/or transmitting, from the network entity to one or more terminals, one or more terminal-unspecific handover qualification data defining a qualification of one or more cells for handover cell selection depending on a terminal speed, autonomously determining a terminal speed, and selecting one or more cells for handover cell selection using the received one or more handover qualification data on the basis of the determined terminal speed. Said measures may exemplarily be applied for mobility procedures in heterogeneous network environments based on LTE, LTE-Advanced, HSPA and/or UMTS radio access systems. | 08-15-2013 |
20140057636 | MOBILE CELLULAR NETWORKS - Multiple mobile cellular network (MCN) communication systems can be networked together to form a network of MCN communication systems (NOM). Each MCN communication system within the NOM can operate as an independent cellular network to provide communications between user equipment within a covered area. When a UE in one MCN of the NOM moves into a different MCN of the NOM, the corresponding MCN communication systems can handover the UE. The UE can also be handed over between MCN communication systems when the MCN communication systems move. | 02-27-2014 |
20140073330 | METHOD OF ENHANCING HANDOVER BY USING A GROUP HANDOVER OVER A WIRELESS CONNECTION AND DEVICES THEREFOR - A method of enhancing handover by using chain handover over a wireless connection, for use in a plurality of moving devices, is introduced. In the method, a control message is received by one of a plurality of moving devices. A report message is transmitted by the one of the plurality of moving devices, in which the one of the plurality of moving devices sets in a state for group handover and represents all others of the plurality of moving devices for a handover decision. It is determined that a part or all of the plurality of moving devices are allowed to perform the group handover according to the report message. The part or all of the plurality of moving devices allowed to perform the group handoversequentially perform a handover procedure after receiving a reconfiguration message. | 03-13-2014 |
20140087739 | MOBILITY ROBUSTNESS OPTIMIZATION BASED ON REFERENCE SIGNAL STRENGTH MAPS - A map-based mobility robustness optimization (MRO) capability is provided for improving one or more aspects related to mobility in a wireless communication network. The map-based MRO capability may use one or more reference signal strength map associated with a wireless network to determine at least one management function for the wireless network. The at least one management function may include determining at least one configuration action adapted to satisfy a handover failure rate for the wireless network based on the one or more reference signal strength maps, preventing handover race conditions in a cluster of wireless cells covered by the one or more reference signal strength maps, or the like. The one or more management functions may be adapted to improve or optimize one or more of handover failure rate, prevention of handover race conditions, or the like. | 03-27-2014 |
20140099962 | CELL PARTITIONING FOR HIGH-SPEED USERS - The present invention relates to a radio access arrangement for operating a radio cell (C), and comprising at least one wireless transceiver ( | 04-10-2014 |
20140141785 | CELL CHANGE METHOD AND DEVICE - Embodiments of the present invention provide a cell change method and device. The method includes: determining that a target cell of cell change is a micro cell, where the cell change includes cell reselection or cell handover; determining a mobility state or a moving speed of a user equipment; and making a cell change decision for the target cell according to the mobility state or the moving speed of the user equipment. In a process of making a cell change decision for a micro cell in the embodiments of the present invention, the mobility state or the moving speed of the user equipment is taken into account, to reduce unnecessary cell changes for the micro cell, thereby reducing the system burden and user equipment power consumption caused by frequent cell change. | 05-22-2014 |
20140148174 | HANDOVER ROBUSTNESS IN CELLULAR RADIO COMMUNICATIONS - An indication of the speed of movement of a UE in a radio communications system is received ( | 05-29-2014 |
20140274067 | MOBILE TERMINAL, CONTROL METHOD, AND COMMUNICATION SYSTEM - A mobile terminal includes a receiving unit that is configured to enable reception of a wireless signal by concurrently using a first cell of a first frequency bandwidth and a second cell of a second frequency bandwidth that is different from the first frequency bandwidth, the second cell having a range that is smaller than the first cell; and a processor that is configured to detect a movement speed of the mobile terminal, and shift the receiving unit to a second state when the detected movement speed falls below a predetermined speed during a first state in which the receiving unit receives the wireless signal by using at least the first cell, the second state being a state in which the receiving unit receives the wireless signal by using the second cell without using the first cell. | 09-18-2014 |
20140287762 | METHOD AND APPARATUS FOR REPORTING SHORT STAY IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for avoiding a short stay problem in a wireless communication system is provided. An eNodeB (eNB) may determine a ratio of a number of short stay user equipments (UEs), which stay at a cell shorter than specific threshold time, to total number of UEs staying at the cell, and transmit the ratio of the number of short stay UEs to the total number of UEs to a previous eNB. Or, the eNB may receive measurement information of at least one second cell from a UE, determine whether the UE can be connected to the at least one second cell, and notify a second eNB whether the UE can be connected to the at least one second cell or not. | 09-25-2014 |
20140295850 | WIRELESS COMMUNICATION SYSTEM FOR IMPROVING THE HANDOFF OF THE WIRELESS MOBILE DEVICE ACCORDING TO GEOGRAPHIC INFORMATION AND A METHOD FOR IMPROVING HANDOFF - A wireless communication system for improving the handoff of wireless mobile devices according to geographic information, including: a first station and a wireless mobile device transmitting first geographic information to the first station and receiving from the first station a first scanning-station period, a first threshold velocity, and a first threshold steering angle corresponding to the first geographic information. When the motion speed of the wireless mobile device is greater than the first threshold velocity or the angle at which the wireless mobile device changes its direction of motion is greater than the first threshold steering angle, the wireless mobile device transmits the second geographic information to the first station and receives from the first station a second scanning-station period, a second threshold velocity, and a second threshold steering angle corresponding to the second geographic information. | 10-02-2014 |
20140295851 | Methods, Apparatus and Computer Programs for Operating a User Equipment - In a first embodiment a user equipment (UE) applies a temporary offset to a cell selection and/or a cell re-selection criterion or criteria in response to determining that a condition is satisfied for the UE. Thereafter, the cell is evaluated for selection or re-selection according to the respective cell selection or cell re-selection criterion or criteria with the applied offset. In a second embodiment, a restriction is imposed for evaluating a cell for selection or re-selection in response to determining that a condition is satisfied for the UE; and the restriction is removed in response to determining that the UE is non-stationary. Examples for the condition include the UE speed being less than a threshold, an indication of the offset being in system information, or a failed number of consecutive random access attempts. Examples of the restriction are the first embodiment's offset and barring the cell for selection/re-selection purposes. | 10-02-2014 |
20140335870 | METHOD AND APPARATUS FOR CONTROLLABLY HANDING OVER A MOBILE TERMINAL TO A SMALL CELL WITHIN A HETEROGENEOUS NETWORK - A method, apparatus and computer program product are provided for controlling the handover of a mobile terminal, particularly a quickly moving mobile terminal, to a small cell. In the method, the speed or the mobility state of the mobile terminal is determined. The method may also determine whether at least a predefined plurality of small cells are available in proximity to the mobile terminal. If the mobile terminal is moving with a speed that satisfies the speed threshold or the mobility state satisfies a predefined criteria, the method causes initiation of a handover of the mobile terminal to a respective small cell only in an instance in which at least the predefined plurality of small cells are determined to be available in proximity to the mobile terminal or in which a successful connection or handover was previously established with the respective small cell or its neighboring small cell(s). | 11-13-2014 |
20140349658 | METHOD FOR OBTAINING MOVING SPEED OF MOBILE TERMINAL, BASE STATION, AND TERMINAL - The present invention relates to a method, a base station, and a terminal for obtaining a moving speed of a mobile terminal. A moving speed of a mobile terminal is obtained by obtaining a distance estimation parameter and using the distance estimation parameter, or a moving speed of a mobile terminal is obtained according to information reported by the mobile terminal, or a moving speed of a mobile terminal is received from another base station, so as to enable a base station to learn the moving speed of the mobile terminal and therefore avoid the problem of call drop caused by slow handover because of a fast moving speed of a mobile terminal. | 11-27-2014 |
20150045040 | HANDOVER IMPROVEMENT FOR HIGH SPEED USER EQUIPMENT IN LTE - Methods and apparatus are disclosed for handing over of a high-speed mobile terminal or user equipment from a source network node to a target network node. Reliable methods for measuring the speed of a moving user equipment are disclosed. Parameters used in a handover procedure are also adjusted in accordance with the speed of the user equipment. For handing over a high-speed user equipment, the present application discloses that the source network node can coordinate with the target network node and other candidate network nodes in transmitting a handover command to prevent handover failures. | 02-12-2015 |
20150065147 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND BASE STATION - When each of a plurality of base stations performs communication with a terminal using a different frequency channel, a first frequency channel for initial connection and a second frequency channel for efficiently using a frequency resource are divided, and handover from a first base station having the first frequency channel and a second base station having the second frequency channel are performed by being led by a base station based on mobility of a terminal. | 03-05-2015 |
20150087317 | SYSTEMS, METHODS, AND DEVICES WITH DIFFERENT RADIO LINK FAILURE TIMERS BASED ON USER EQUIPMENT SPEED - Systems, methods, and device for adjusting an operation time of a radio link failure timer are disclosed herein. User equipment (UE) may be configured to communicatively couple to an evolved Universal Terrestrial Radio Access Network (E-UTRAN). The UE use different radio link failure timer parameters depending on the speed of the UE. The radio link failure timer may run for a longer time for rapidly moving UEs and run for a shorter time for slowly moving UEs. In an embodiment, the UE may scale the radio link failure timer by a scaling factor. In another embodiment, the UE may include multiple radio link failure timers for different speeds. The radio link failure timer parameters for each speed may be specified by the E-UTRAN in a one-to-one communication. The E-UTRAN may determine which parameters to use for each UE based on characteristics of the UE. | 03-26-2015 |
20150141021 | METHOD AND APPARATUS FOR MANAGING HANDOVERS IN A WIRELESS NETWORK BASED ON SPEED GROUP ASSIGNMENTS - A system that incorporates the subject disclosure may include, for example, determining a mobility speed group assignment for a mobile communication device having a radio resource control connection with a wireless network where the mobility speed group assignment is selected from among a plurality of mobility speed groups according to a speed of the mobile communication device, determining a cell size for a serving cell of the wireless network that is providing the radio resource control connection, and selecting a handover policy based on the mobility speed group assignment and the cell size. Other embodiments are disclosed. | 05-21-2015 |
20150341832 | MOBILITY ROBUSTNESS OPTIMIZATION FOR HETEROGENEOUS AND SMALL CELL NETWORKS - Methods, systems, and devices are described for mobility robustness optimization. A network may be organized into base station clusters, and mobility information may be exchanged within the cluster. Each base station may then receive statistics based on the collected information. In some examples the cluster mobility statistics are used to generate a handover transition matrix identifying a probability of a UE remaining with a target base station within the cluster for a threshold period following a handover from a source base station that is also within the cluster. Based on the cluster mobility statistics, the base station may determine that the probability of the UE remaining with the potential target base station for the threshold period is low. The base station may then select an alternative handover target. The base station may then adjust the mobility parameters of the UE in order to direct it to the alternative handover target. | 11-26-2015 |
20150350972 | User Context Aware Throttling of Transition Attempts to Connected Mode - Throttling of transition attempts to connected mode based on user context. A wireless device may camp on a serving cell. A motion state of the wireless device may be monitored. One or more connected mode transition procedures on the serving cell may be attempted. If at least a threshold number of connected mode transition procedures fail on the serving cell while the wireless device is stationary, further connected mode transition attempts may be throttled for up to a certain amount of time. Alternatively, or in addition, the wireless device may bar itself from camping on that cell for up to a certain amount of time. Either or both of throttling connected mode transition attempts or barring cells may also be based on other aspects of user context, such as display state. | 12-03-2015 |
20160057667 | User Context Aware Throttling of Transition Attempts to Connected Mode - Throttling of transition attempts to connected mode based on user context. A wireless device may camp on a serving cell. A motion state of the wireless device may be monitored. One or more connected mode transition procedures on the serving cell may be attempted. If at least a threshold number of connected mode transition procedures fail on the serving cell while the wireless device is stationary, further connected mode transition attempts may be throttled for up to a certain amount of time. Alternatively, or in addition, the wireless device may bar itself from camping on that cell for up to a certain amount of time. Either or both of throttling connected mode transition attempts or barring cells may also be based on other aspects of user context, such as display state. | 02-25-2016 |
20160112928 | METHOD, TERMINAL, BASE STATION, AND SYSTEM FOR ADJUSTING CONTROL PARAMETERS - Embodiments presented herein disclose a method for adjusting control parameters. The method includes: when a terminal fails to be handed over from a source cell to a target cell, or when the terminal is handed over from a source cell to a target cell successfully and a radio link connection failure occurs on a radio link established between the terminal and the target cell, reestablishing, by the terminal, a radio link with a reestablished cell; and sending, by the terminal, a report message to a base station of the reestablished cell, where the report message carries moving speed information of the terminal and/or size information of the target cell. | 04-21-2016 |
20160128134 | SYSTEMS, METHODS, AND DEVICES WITH DIFFERENT RADIO LINK FAILURE TIMERS BASED ON USER EQUIPMENT SPEED - Systems, methods, and device for adjusting an operation time of a radio link failure timer are disclosed herein. User equipment (UE) may be configured to communicatively couple to an evolved Universal Terrestrial Radio Access Network (E-UTRAN). The UE use different radio link failure timer parameters depending on the speed of the UE. The radio link failure timer may run for a longer time for rapidly moving UEs and run for a shorter time for slowly moving UEs. In an embodiment, the UE may scale the radio link failure timer by a scaling factor. In another embodiment, the UE may include multiple radio link failure timers for different speeds. The radio link failure timer parameters for each speed may be specified by the E-UTRAN in a one-to-one communication. The E-UTRAN may determine which parameters to use for each UE based on characteristics of the UE. | 05-05-2016 |
20160135232 | MOBILE CELLULAR NETWORKS - Multiple mobile cellular network (MCN) communication systems can be networked together to form a network of MCN communication systems (NOM). Each MCN communication system within the NOM can operate as an independent cellular network to provide communications between user equipment within a covered area. When a UE in one MCN of the NOM moves into a different MCN of the NOM, the corresponding MCN communication systems can handover the UE. The UE can also be handed over between MCN communication systems when the MCN communication systems move. | 05-12-2016 |