WO2014090068A1 - 无线通信网络中的移动切换管理方法、设备及系统 - Google Patents
无线通信网络中的移动切换管理方法、设备及系统 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00838—Resource reservation for handover
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- next-generation networks An important feature of next-generation networks is the coexistence of multiple wireless technologies to form heterogeneous wireless access networks.
- the heterogeneous wireless access network cover can be divided into a Wide Area Network (WAN), a Metropolitan Area Network (MAN), a Local Area Network (LAN), and a Personal Area Network (Personal Area Network). PAN), etc.; from the network architecture can be divided into point-to-multipoint single-hop network (Single-hop Network), multi-hop network (Multi-hop Network), mesh network (Mesh Network) And Ad Hoc, etc. They form a three-dimensional coverage of geographical distribution, which together provide users with ubiquitous content-rich wireless multimedia services.
- WAN Wide Area Network
- MAN Metropolitan Area Network
- LAN Local Area Network
- PAN Personal Area Network
- PAN Personal Area Network
- PAN Personal Area Network
- From the network architecture can be divided into point-to-multipoint single-hop network (Single-hop Network), multi-hop network (Multi-hop Network), mesh network (Mesh Network)
- Heterogeneous networks increase the complexity of network density and network layout, and bring great challenges to mobile handover management, especially mobile handover management of mobile devices with medium and high speed motion.
- Some embodiments of the present disclosure provide mobile handover management methods, devices, and systems in a wireless communication network that enable fast and efficient handoff of mobile devices in motion.
- a mobile switching in a wireless communication network comprising: an alternative cell determining device configured to select, according to the predicted motion trajectory of the mobile device, a selected one of the trajectories in the wireless communication network for the mobile device in the wireless communication network a plurality of candidate handover cells to pass through to form an alternate handover cell sequence of the mobile device; and target cell determination means configured to be small according to a motion speed, a motion direction, and the candidate handover of the mobile device The sequence is used to generate a target cell for the mobile device, which switches the small target handover cell.
- a mobile handover management method in a wireless communication network comprising: for a mobile device in a wireless communication network, according to the predicted mobile device a plurality of candidate handover cells through which the motion trajectory is to be routed in the wireless communication network to form an alternate handover cell sequence of the mobile device; and according to the motion speed, motion direction, and The candidate handover cell sequence generates a target handover cell sequence of the mobile device, the target handover cell sequence including a plurality of target handover cells to which the mobile device is to be sequentially switched to move along the motion trajectory.
- a mobile user equipment in a wireless communication network comprising: receiving means configured to receive a mobile handover management entity in a wireless communication network according to a prediction a target handover cell sequence for the mobile user equipment generated by moving the user equipment's motion trajectory, the target handover cell sequence including a plurality of target handover cells to which the mobile user equipment is to be sequentially switched to move along the motion trajectory;
- the switching device is configured to sequentially switch to the corresponding target handover cell according to the target handover cell sequence when the mobile user equipment moves along the motion trajectory.
- a mobile handover management method in a wireless communication network including: receiving, by a mobile user equipment in a wireless communication network, a mobile handover management entity in a wireless communication network according to a prediction a target handover cell sequence for the mobile user equipment generated by the motion trajectory of the mobile user equipment, the target handover cell sequence including a plurality of target handover cells to which the mobile user equipment is to be switched in sequence along the motion trajectory And switching to the corresponding target handover cell according to the target handover cell sequence when the mobile user equipment moves along the motion trajectory.
- a wireless communication system including a multi-motion handover management device and the mobile user equipment is provided.
- a motion estimation apparatus for estimating a motion parameter of a mobile device in a wireless communication network, and comprising: a trajectory obtaining device configured to obtain a motion trajectory of the mobile device in the wireless communication network; and estimating means configured to estimate a motion parameter of the mobile device based on a motion state of the projection point of the mobile device on the movement trajectory.
- a motion estimation method for estimating motion parameters of a mobile device in a wireless communication network, and comprising: obtaining a mobile device in a wireless communication network a motion trajectory; and estimating a motion parameter of the mobile device based on a motion state of the projection point of the mobile device on the movement trajectory.
- a mobile handover management device in a wireless communication network comprising: an available resource determination module configured to: when a mobile device in a wireless communication network needs to perform cell handover, Determining available resources of the alternate handover cell; and a handover control module configured to control cell handover of the mobile device based on available resource conditions of the alternate handover cell.
- a mobile handover management method in a wireless communication network including: determining, when a mobile device in a wireless communication network needs to perform cell handover, determining that an alternate handover cell is available a resource; and controlling cell handover of the mobile device based on available resources of the alternate handover cell.
- the present disclosure also provides a computer program for implementing any of the above methods.
- the present disclosure also provides a computer program product in the form of at least a computer readable medium having computer program code for implementing any of the methods described above.
- FIG. 1 is a schematic flow chart showing a mobile handover management method according to an embodiment
- FIG. 2 is a schematic flowchart showing one example of a method of predicting a motion trajectory of a mobile device without navigation information assistance
- FIG. 3 is a schematic flowchart showing one example of a method of predicting a motion trajectory of a mobile device with navigation information assistance
- FIG. 4 is a schematic flow chart showing one example of selecting an alternate handover cell of a mobile device based on the predicted motion trajectory
- FIG. 5 is a schematic flowchart showing another example of selecting an alternate handover cell of a mobile device according to the predicted motion trajectory
- FIG. 6 is a schematic flow chart showing another example of selecting an alternate handover cell of a mobile device according to the predicted motion trajectory
- FIG. 7 is a schematic diagram showing one example of an alternative geographic area according to a predicted motion trajectory
- FIG. 8 is a schematic flowchart showing one example of a method of generating a target handover cell sequence according to an embodiment
- FIG. 9 is a schematic flowchart showing another example of a method of generating a target handover cell sequence according to an embodiment
- FIG. 10 is a schematic diagram showing an example of a positional relationship of an alternate handover cell on a motion trajectory
- FIG. 11 is a schematic diagram showing one example of a method of calculating an intersection of a coverage area of an alternate handover cell and a motion trajectory;
- FIG. 12(a) is a diagram showing a distribution between a plurality of candidate handover cells on a motion trajectory
- FIG. 12(b) is a diagram showing an association relationship between respective candidate handover cells.
- FIG. 13 is a schematic diagram showing comparison of an actual motion trajectory with a predicted motion trajectory
- FIG. 14 is a schematic flowchart showing a mobile handover management method according to another embodiment
- 15 is a schematic flow diagram showing a method of estimating motion characteristics of a mobile device, in accordance with one embodiment
- 16 is a schematic flowchart showing one example of a method of grouping a plurality of mobile devices according to motion characteristics, according to an embodiment
- FIG. 17 is a schematic diagram showing a mobile handover management apparatus according to an embodiment of the present invention.
- FIG. 18 is a schematic block diagram showing an example of an alternative cell switching device in a mobile handover management device
- 19 is a schematic block diagram showing an example of a target cell switching device in a mobile handover management device
- 20 is a schematic block diagram showing a mobile handover management device according to another embodiment
- 21 is a schematic block diagram showing a motion estimation apparatus according to an embodiment
- 22 is a schematic block diagram showing a mobile user equipment according to an embodiment of the present disclosure.
- FIG. 23 is a schematic block diagram showing the structure of a computer device capable of implementing an embodiment of the present disclosure.
- Some embodiments of the present disclosure provide mobile handover management methods, devices, and systems in a wireless communication network that enable fast and efficient handoff of mobile devices in motion.
- FIG. 1 is a schematic flow chart showing a mobile handover management method in a wireless communication network, according to an embodiment of the present disclosure.
- the method illustrated in Figure 1 may be implemented by a mobile handover management entity (or mobile handover management device) in a wireless communication network.
- the wireless communication network described herein may include one or more wireless communication systems, such as Global System for Mobile Communications (GSM), Third Generation (3G) communication systems, Long Term Evolution (LTE) communication systems, WiFi communication networks, and the like.
- the mobile handover management entity may be a radio network controller or manager disposed between the one or more wireless communication systems, for example, with a mobile switch interconnected with each wireless communication network by wire or wirelessly Management function of the server, etc.
- the mobile handover management entity may also be disposed in a base station of the wireless communication network as part of the base station.
- the mobile handover management entity may also be distributed in a plurality of base stations of the wireless communication network.
- the function of the mobile handover management entity can be performed by a certain cell (base station) in the area, and when the mobile device moves to another of the wireless communication network In the area, the function of the mobile handover management entity is performed by a certain cell (base station) in the other area. That is to say, in a case where the mobile handover management entity is distributed in a plurality of base stations, each of the plurality of base stations can perform the function of the mobility handover management entity.
- the mobile switching management entity and each cell in the wireless communication network may be interconnected through a backbone network to exchange information through the backbone network.
- the term "mobile device” as used herein refers to a user device that is moving in a wireless communication network (such as a mobile phone or an electronic device such as a portable computer, tablet or PDA that accesses a wireless communication network), also called For "mobile user devices.”
- the mobile handover management method includes steps 104 and 106.
- step 104 for a mobile device in a wireless communication network, a plurality of candidate handover cells through which the motion trajectory is to be routed are selected in the wireless communication network based on the predicted motion trajectory of the mobile device.
- the selected plurality of alternate handover cells form an alternate handover cell sequence for the mobile device.
- the motion information of the mobile device can be obtained by navigation information.
- it can predict the future motion trajectory of the existing motion track of the device.
- FIG. 2 shows an example of a method of predicting a motion trajectory of a mobile device without navigation information assistance.
- step 202-1 a plurality of locations in an existing motion trajectory of the mobile device are sampled.
- GPS Global Positioning System
- sampling frequency the interval between two adjacent sampling positions
- Frequency sampling is called static sampling. If the mobile device is divided into multiple categories according to the rate of motion of the mobile device and samples are taken with the same sampling frequency for each class, it is called semi-static sampling. If sampling is performed with different sampling frequencies according to the moving rate of each mobile device, it is called dynamic sampling. For example, the sampling frequency can be lowered when the mobile device's motion rate is low, and the sampling frequency can be increased when the mobile device's motion rate is high. This has the advantage of improving the accuracy of the trajectory calculation while reducing the amount of computation required for sampling and subsequent trajectory calculations.
- step 202-2 the motion trajectory of the mobile device is predicted by fitting based on the plurality of samples sampled.
- Various fitting methods can be used. Usually within the macro distance, the user will choose to follow the shortest distance route, so a straight line can be used to fit the motion trajectory. As an example, the fitting can be performed using the Least square method. Specifically, it is assumed that the sampling position points sampled in a time series t ⁇ , . . .
- Figure 3 shows the prediction of the motion track of the mobile device with navigation information assistance. An example of a trace method.
- step 302-1 information about the departure place and the destination of the mobile device is obtained, and then, in step 302-2, a navigation route corresponding to the departure place and the destination is obtained according to the navigation information, as The motion trajectory of the mobile device.
- the navigation route is usually in the form of a polyline. To collapse subsequent calculations, you can split it into multiple lines. For example, splitting the line according to the inflection point of the navigation route divides the line into a plurality of line segments, and then operates on each line segment.
- the above method of predicting a future motion trajectory of a mobile device can be performed by a mobile handover management entity.
- the step of predicting the motion trajectory of the mobile device may also be included before step 104.
- the future motion trajectory of the mobile device may also be predicted by other related devices (such as the mobile device itself or a GPS device capable of providing navigation information or GPS information about the mobile device, etc.) and sent to the mobility management entity. After obtaining the predicted motion trajectory of the mobile device, the candidate switching cells to be traversed by the motion trajectory can be selected.
- Each candidate handover cell in the alternate handover cell sequence is a cell to which the motion trajectory of the mobile device is to pass.
- an alternate handover cell sequence is formed.
- a variety of methods can be employed to select alternative handover cell sequences.
- the alternate handover cell can be selected, for example, using the method described below with reference to Figures 4-6.
- FIG. 4 illustrates an example of selecting an alternate switching cell of a mobile device based on the predicted motion trajectory. In this example, all cells in the wireless communication network are examined.
- step 404-1 the distance from the base station of each cell in the wireless communication network to the motion track is estimated.
- the distance from the base station to the motion trajectory can be calculated by projecting the position of each base station onto the motion trajectory. For example, assume that the base station's projection point on the motion trajectory L of the mobile device is ppt BS ⁇ L), the distance from the base station BSi to its projection point pptKBS ⁇ L) can be calculated as the distance from the base station to the motion trajectory.
- step 404-2 a cell whose distance to the motion trajectory is smaller than its coverage radius is selected as an alternate handover cell in the candidate handover cell sequence.
- the cell satisfying the condition IBSi - pptKBS L)! ⁇ ⁇ is selected as the alternate handover cell.
- the base station ⁇ that satisfies the above conditions is arranged according to the moving direction of the mobile device according to the coordinates of the base station projection point coordinates, so that an alternate handover cell sequence can be formed.
- the base stations are arranged in the order of the abscissa of the projection point pptKB L); otherwise, they are arranged in descending order of the abscissa.
- the method shown in Figure 4 can be implemented by a mobile handover management entity.
- the above-described steps of calculating the distances of the respective base stations to the motion trajectory may also be separately implemented by the respective base stations.
- Fig. 5 shows such a specific example.
- the base station BS of each cell receives information of the predicted motion trajectory L of the mobile device from the mobile handover management entity.
- the base station BSi calculates its projection point pptKB ⁇ L) on the motion trajectory L of the mobile device, and calculates the distance between it and the projection point.
- the base station determines if it can become an alternate handover cell.
- the base station feeds back information to the mobile handover management entity as to whether it can be used as an alternate handover cell. If it can become an alternative cell, it also feeds back its projection point coordinates.
- the mobile handover management entity transmits information of the predicted motion trajectory L of the mobile device to the base station of each cell, and receives information of whether the base station of each cell can be used as an alternative handover cell (which can also receive the base station on the motion trajectory). Information about the projection point).
- Each candidate handover cell in the candidate handover cell sequence may be arranged according to the motion direction of the mobile device according to the order of the projection points of the base stations of each candidate handover cell on the motion trajectory.
- the mobile handover management entity according to the information fed back by each base station, will be able to become the candidate cell base station according to the moving direction of the mobile device according to the base station projection point coordinate order to form an alternate handover cell sequence.
- FIG. 6 illustrates another example of selecting an alternate switching cell of a mobile device based on the predicted motion trajectory.
- this example instead of examining all cells in the wireless communication network, only the cells within the alternate geographic area through which the predicted motion trajectory passes are considered.
- step 604-1 an alternate geographic area along the predicted motion trajectory is selected.
- the mobile handover management entity can estimate the candidate geographic area based on the predicted motion trajectory of the mobile device.
- Figure 7 shows an example of an alternate geographic area.
- the candidate area can be used with a sliding window (shown in the figure with the mobile device motion trajectory M ⁇ Characterized by the straight lines Lu and L D and the rectangles L L and L R perpendicular to L).
- the projection points of the base stations BS BS BS 2 and BS 4 of the cells in the sliding window to the motion trajectory L can be calculated and the distances of the respective base stations to their projection points can be calculated as the respective base stations.
- the distance to the motion track As shown in Figure 7, the distance w between Lu and L D to L does not exceed the maximum value of the coverage of all cell signals; the intersection P s with L is the projection point of the current mobile device on L; the intersection point of L R and L D is the end point of a valid motion trajectory of the mobile device.
- the end point of the effective motion trajectory can select the inflection point of the navigation route.
- the end point of the effective motion trajectory will be determined by the prediction accuracy of the trajectory, the motion speed of the mobile device, and the computing power of the mobile handover management entity.
- the higher the prediction accuracy the longer the path of the effective motion trajectory.
- the shorter the opposite. The faster the moving speed of the mobile device, the longer the path of the effective motion trajectory, and vice versa.
- the stronger the computing power of the mobile handover management entity the longer the path of the effective motion trajectory, and vice versa.
- the mobile handover management entity may acquire coverage information of each cell from a radio environment map of the wireless communication network, mainly including the base station.
- BS 1 X can be substituted into four straight lines Lu, L D , L L and L R equation, respectively BS.y BSw BS 1 ⁇ , then the base station 8 1 is located in the candidate area sliding window.
- step 604-2 a distance from a base station of each of the candidate geographic regions to the motion trajectory is estimated. This step is similar to the method of calculating the distance in the above example, and will not be repeated here. Then, in step 604-3, a cell whose distance to the motion trajectory is smaller than its coverage radius is selected as an alternate handover cell in the candidate handover cell sequence. Steps 604-2 and 604-3 may be implemented by the mobile handover management entity, or may be implemented by each base station, and are not repeated here.
- the target Switching the cell sequence may include moving, by the mobile device, a plurality of target handover cells to be sequentially switched to along the motion trajectory.
- information about the speed and direction of motion of a mobile device there are several ways to get information about the speed and direction of motion of a mobile device.
- information about the speed of motion and direction of motion may be reported by the mobile device to the serving cell or the mobile handover management entity.
- the method of the following description with reference to Figure 15 can also be employed to estimate the direction of motion and the speed of motion of the mobile device.
- it can be used A variety of methods are used to generate the target handover cell, for example, the method described below with reference to Figures 8-12 can be used to generate the target handover cell.
- the mobile handover management entity may notify each target handover cell involved in the sequence of information about the mobile device.
- the mobile device may sequentially switch to each target handover cell according to the target handover cell sequence.
- FIG. 8 is a schematic flow chart showing an example of a method of generating a target handover cell sequence according to an embodiment of the disclosure. The method can be performed after the alternative handover cell sequence of the mobile device is formed using the method described above.
- the method of generating a target handover cell sequence may include steps 806-1, 806-2, and 806-3.
- the arrival time of the mobile device to reach each of the alternate handover cells and the dwell time to be camped in each of the alternate handover cells are estimated based on the direction of motion of the mobile device and the speed of motion.
- the time of arrival to the alternate handover cell may be estimated based on the speed of movement of the mobile device and the distance of the mobile device along the motion trajectory to the alternate handover cell.
- the distance traveled by the mobile device along the motion trajectory in the candidate handover cell may be estimated by the intersection of the predicted motion trajectory and the coverage of the candidate handover cell, and the mobile device is calculated according to the motion speed of the mobile device.
- the alternate time in the cell is switched.
- each candidate handover cell pair is calculated according to the estimated arrival time of the mobile device to reach each candidate handover cell and the camp time to be camped in each candidate handover cell.
- the resources that the alternate handover cell can reserve for the mobile device during the dwell time are estimated, for example, based on the resource configuration of the alternate handover cell.
- step 806-3 according to the location relationship of each candidate handover cell on the motion trajectory and according to each candidate handover cell, the available resources of the mobile device, in the candidate handover cell
- the target handover cell is selected in the sequence. For example, if the mobile device is expected to need to perform cell handover at a certain location on the predicted motion trajectory and there is more than one alternate handover cell at the location, then the handover may be small according to each alternative.
- the zone may reserve available resources for the mobile device, selecting one that can provide the best service for the mobile device as the target handover cell at the location on the motion trajectory. If the mobile device is expected to perform a cell handover at a location on the predicted motion trajectory and there is an alternate handover cell at that location, then the alternate handover cell is the target handover cell.
- a relationship between available resources of each candidate handover cell and bandwidth requirements of the mobile device may be calculated, according to the relationship and/or the camp time in each candidate handover cell
- the target switching cell is selected.
- the relationship between the available resources and the bandwidth requirement of the mobile device may be a ratio between the two as a reservation request ratio for each candidate cell, and may be based on the reservation request ratio and/or
- the dwell time selects the target handover cell in each candidate handover cell. For example, if the mobile device is expected to need to perform cell handover at a certain location on the predicted motion trajectory and there is more than one alternate handover cell at the location, then one of the reservation requests may be selected as the active one. The target switching cell at this location on the trajectory.
- the target handover cell is selected among the respective candidate handover cells.
- Figure 9 shows a more specific example of generating a sequence of target handover cells.
- step 906-1 the association relationship of each candidate handover cell on the predicted motion trajectory of the mobile device is calculated.
- the association relationship of each candidate handover cell on the motion trajectory refers to the relationship between the signal coverage boundary of each candidate handover cell and the intersection of the predicted motion trajectory of the mobile device.
- Figure 10 shows three examples of such an association. As shown in FIG. 10, taking two cells as an example, there may be three relationships.
- the intersection of the signal coverage boundary of the cell and the motion locus L is P u , P 1 r and P j 1 , Pj, r , respectively .
- Such an adjacency relationship can be represented by a directed arc as BS ⁇ BS.
- the cell 88 1 shown in Fig. 12(c) completely contains the portion on the motion locus L.
- the order of the corresponding intersection point on the motion locus L is This association relationship between the two cells is referred to as "compatibility", meaning that the mobile device moving along the motion trajectory L switches from the cell BSi to the BSj and then switches back to the BS ie.
- the association relationship can be expressed as Taking the two cells shown in FIG. 10 as an example, in step 906-1, the intersection of the coverage area of the alternate handover cell 8 and the motion trajectory L may be first calculated, and FIG. 11 shows a method for calculating the intersection point. Example. As shown in FIG.
- the partial motion trajectory is represented by a straight line L
- the position of the base station 8 is (BS ⁇ BS and its signal coverage radius is two points at which the distance from the trajectory L to the BSi can be obtained, respectively, denoted as P u and P ⁇ , these two points are the intersection of the coverage of the base station and the motion trajectory, wherein the abscissa of P u is smaller than Pw.
- step 906-2 the time parameter of the mobile device is calculated.
- the time parameters described herein include the time of arrival of the mobile device to reach each of the alternate handover cells and the dwell time to be camped in each of the alternate handover cells.
- IP U - P s l is the distance that the mobile device reaches 8
- ⁇ - P u l is the distance that the mobile device is expected to stay within the coverage of 8.
- the dwell time can be used as the first weight W u of each node (ie, cell) in the association graph of FIG. 12( b ).
- the time can be used as the weight Ww of the directed arc in the correlation diagram of Figure 12 (b).
- step 906-3 the available resources of the alternate handover cell to the mobile device are calculated, for example, the candidate handover cell may be pre-defined for the mobile device within the time period defined by the estimated arrival time and the residence time. Resources left.
- a mobile switching management entity may be a mobile device estimated arrival time of handover alternatives ⁇ ⁇ 1 cell residence time and sent to the base station corresponding to a cell Beta, and send the current BW request bandwidth requirements of the mobile device, It is estimated by the base station 8 whether sufficient reserved resources can be provided for the mobile device.
- the base station determines whether the total resource capacity of the system can meet the current user bandwidth requirement, the user bandwidth requirement generated by the handover to the t ⁇ r ⁇ time, and the user bandwidth requirement newly generated by the time of the device, whether the mobile device can also provide the pre-preparation for the mobile device. Leave resources BW reserved ⁇
- Each of the alternate handover cells may be classified using the relationship of the reserved resources to the bandwidth requirements of the mobile device.
- the alternate handover cell that can provide more reserved resources has a higher priority in the target handover cell sequence, while the alternate handover cell that provides less reserved resources has a lower priority in the target handover cell sequence.
- BW curren t At time ti, the total bandwidth demand of the handover user (excluding the target mobile device) expected to arrive is BW HO ⁇ , and the total bandwidth requirement of the outgoing handover user is expected to be BW HO —. ut, is expected to set aside capital to generate demand for new users total bandwidth of BW NEW ⁇ , is expected to end users total bandwidth demand BW NEW out, the cell may provide for mobile devices
- the source BW ⁇ served can be calculated by:
- BW i.reserved Ci_ (BW curr ent+BW H 0_in - BW H 0_out +BWNEW in - BWNEW out)
- BW c ent can be calculated according to the actual bandwidth demand of the current user of the cell; BW HO _m and BW H . ⁇ . ut request information may be calculated based on time and bandwidth mobile users; and BWNEW m and BWNEW-. Ut can be calculated based on the statistical information of the cell BSi.
- the reservation request ratio SQR ⁇ can be calculated, which represents a ratio of the reserved resource to the bandwidth requirement of the mobile device.
- the reservation request ratio can be used as the second weight of each node in the association diagram of Figure 12 (b).
- step 906-4 a target handover cell sequence is generated.
- each node represents an alternate handover cell, and each node assigns a first weight. This weight represents the expected dwell time of the mobile device within cell 88 1 .
- Each node also gives a second weight WifSQR which represents the cell's request reservation ratio to the mobile device.
- each node is also assigned a third weight W ⁇ p ⁇ which represents the expected power level of the mobile device within the cell BSi.
- the target handover cell sequence is generated, that is, the target is obtained.
- the optimization target may include minimizing the number of handovers of the mobile device or maximizing the system capacity of all cells on the motion trajectory L, and the like.
- the optimal solution for any optimization goal on the correlation graph is the NP-hard problem.
- the following provides an approximate method to obtain a suboptimal solution to achieve a compromise between system performance and computational complexity.
- the candidate cell may be divided into multiple priority levels by using the first weight of the node as the first criterion, and the greater the first weight, the priority is given.
- the cells of the first priority level are selected and arranged in the order along the motion trajectory L. If two consecutive cells BSi in the arrangement are associated with no directed arcs (ie, the association relationship is not adjacent), then the association relationship is Look for the directional path from BS ⁇ 'J BSj. For example, in FIG. 12(b), the first weight of the nodes of the cells 88 1 and 88 4 belongs to the first priority, and according to the first criterion, the cells 88 1 and 88 4 are selected , and it is necessary to find the slave BS 3 ⁇ 4 BS 4 To the path.
- the second weight of the node may be used as the second criterion, and all cells between the cells 8 and 8 are divided into multiple priority levels, that is, the greater the second weight, the higher the priority level, and the selection
- the cells of the first priority level are arranged in the order along the motion trajectory L. If there is no directional arc association between two consecutive cells in the arrangement, the nodes in the second priority level are considered. For example, in FIG. 12(b), both cells BS 2 and BS 3 can form a directional path between cells 88 1 and 88 4 and a second weight of cell BS 2 is higher, and then select according to the second criterion.
- the cell BS 2 in the case where the first criterion and the second criterion are the same, the third weight of the node may be used as the third criterion, so that the cell with a low power level has a higher priority to reduce the mobile device. Energy consumption. It can be ensured that the arc weight value in the selected directional path exceeds a threshold ⁇ ⁇ , which represents the time required for the mobile device to perform the handover operation.
- the second weight of the node may be set as the first criterion, and the first weight of the node is the second criterion.
- the third weight of the node is used as the third criterion.
- the target handover cell sequence can be obtained according to the method in the foregoing specific example, and is not repeated here.
- the target switching cell sequence when the mobile device moves along the predicted motion trajectory can be obtained by using the method shown in FIG. 8 or FIG. 9.
- Mobile switching management entity can Each target handover cell involved in the sequence is notified that it is selected and informs the cells of the estimated time of arrival, dwell time, and bandwidth requirements of the mobile device. These cells write the mobile device to its switching user queue and reserve resources for it, such as the resources calculated in the above BW request ⁇ . If a target handover cell changes the result of the resource allocation decision so that the mobile device resource reservation cannot be satisfied, the mobile handover management entity is notified to initiate the handover management update.
- the mobile handover management entity may also notify the mobile device of the generated target handover cell sequence.
- the mobile device may use the target handover cell sequence as a priority handover option, that is, the mobile device may sequentially switch according to the target handover cell sequence when moving along the predicted motion trajectory.
- a cell handover of a mobile device can be initiated by power measurements. For example, when the power of the current serving cell received by the mobile device in the continuous measurement is lower than the threshold, the cell handover may be initiated, and the handover operation is performed with the next handover cell BSj in the target handover cell sequence as the priority handover target.
- the handover may be initiated by motion information assisted power measurements.
- the mobile device moves to an area close to the power threshold within the coverage of the current serving cell (eg, enters the intersection P L1 of the next cell ⁇ with the L of the motion trajectory);
- the cell handover is performed, and the handover operation is performed with the next handover cell BSj in the target handover cell sequence as the priority handover target.
- the handover may also be initiated by motion information.
- the handover is initiated, and the cell sequence is switched with the target.
- the next handover cell performs a handover operation for the priority handover target.
- an update of the handover management may also be initiated.
- the previously predicted motion trajectory L does not match the actual motion trajectory, so the motion characteristics of the mobile device must be re-predicted. Specifically, it can be resampled during the motion of the mobile device Position the point and compare the actual motion trajectory L with the previously predicted motion trajectory L.
- FIG. 13 shows a schematic diagram comparing the two.
- the hypothesis 8 indicates the initial position of the motion device;
- p d indicates the destination position;
- L indicates the previously predicted motion trajectory;
- Pl , p 2 , ... ⁇ ,, ⁇ , ⁇ are the motion directions
- L represents the actual motion trajectory defined by these resampled position points. If the angle ⁇ between the actual motion trajectory and the previously predicted motion trajectory is greater than a predetermined threshold S angle , it indicates that the motion trajectory of the mobile device needs to be re-predicted.
- the motion trajectory can be re-predicted using the method described above with reference to Figures 2-3 and will not be repeated here.
- the time parameter such as the arrival time and/or the dwell time of the mobile device to be reached to each target handover cell may be re-estimated, and the target handover cell sequence is recalculated.
- the current actual moving speed of the mobile device is v
- the actual moving speed is compared with the previously predicted moving speed V, if the difference between the two speeds is greater than a certain preset threshold S vd .
- re-estimating the time parameter that the mobile device is about to reach the arrival time and/or the dwell time of each target handover cell and recalculating the target handover cell sequence.
- the method described above can be used to recalculate the time parameters and regenerate the target handover cell sequence, which is not repeated here.
- a reservation request ratio between an available resource of the handover cell and a bandwidth requirement of the mobile device may be recalculated; and The target handover cell sequence is regenerated according to the recalculated reservation request ratio.
- the reservation request ratio of the target handover cell may be recalculated during the motion of the mobile device, and if the change of the ratio exceeds a predetermined threshold, the target handover cell sequence is regenerated.
- the target handover cell may be reselected using the method of step 106 shown in FIG.
- Various embodiments or examples of the mobile handover management method described above may be applied to a scenario in which a mobile device switches between cells having the same Radio Access Technology (RAT).
- RAT Radio Access Technology
- FIG. 14 illustrates one embodiment of a mobile handover management method in a scenario including cells having different radio access technologies in a wireless communication network. Included in the wireless communication network The cell handover of the mobile device in the scenario of the cell with different radio access technologies is also referred to as vertical handover. The method shown in FIG. 14 can be performed by the mobile handover management device.
- the mobile switching management device is connected to each wireless communication network through a backbone. That is, the mobile switching management device and each wireless communication network can exchange information through the backbone network.
- step 1404 a plurality of cells through which the motion track passes are selected in the wireless communication network based on the predicted motion trajectory of the mobile device.
- This step is similar to step 104 described above, and the plurality of cells may be selected using the method described above with reference to Figures 4-6, and will not be repeated here.
- the prediction of the future motion trajectory of the mobile device as described above can be performed by the mobile handover management entity.
- the step of measuring the motion trajectory of the mobile device (not shown in Fig. 14) may be included before step 1404.
- the future motion trajectory of the mobile device may also be predicted by other related devices (such as the mobile device itself or a GPS device capable of providing navigation information or GPS information about the mobile device, etc.) and sent to the mobility management entity.
- step 1405 it is determined whether the radio access technology and transmission resources (e.g., spectrum) of each of the plurality of cells selected in step 1404 are available for use by the mobile device.
- a radio access technology and a transmission resource e.g., a spectrum
- the mobile handover management device may store information about the radio access technology of each cell and information about the spectrum of each cell and its changes (eg, stored in its database or other type of storage device) from which the storage device is used. Or extract this information from the database.
- the mobile handover management device may exchange information with each wireless communication network through the backbone network, and the exchanged information may include information about available radio access technologies of related cells (such as alternate handover cells) and transmission resources such as transmission resources of related handover cells. Information about its changes.
- a target handover cell sequence of the mobile device is generated according to the motion speed, the motion direction of the mobile device, and the candidate handover cell sequence, the target handover cell sequence including the mobile
- the device moves a plurality of target switching cells to be sequentially switched to along the motion trajectory.
- This step is similar to step 106 described above, and the target handover cell sequence can be generated using the method described above with reference to Figures 8-12, which is not repeated here.
- the target handover cell in a scenario of vertical handover, when the radio access technology and the frequency of the available handover cell change, if the communication cannot be supported by the mobile device, the target handover cell must be regenerated. sequence. If the radio access technology and spectrum available to the alternate handover cell are changed but the communication of the mobile device can also be supported, the reserved bandwidth reserved for the mobile device can be recalculated. If the reserved bandwidth is changed compared to the previously calculated reserved bandwidth, the target switching cell sequence needs to be recalculated.
- a method of estimating (calculating) motion characteristics of a mobile device in motion is also provided.
- Figure 15 illustrates a method of estimating motion characteristics of a mobile device, in accordance with one embodiment.
- step 1512 the current position of the mobile device is projected onto the motion trajectory of the motion device.
- step 1514 the direction of motion and the speed of motion of the mobile device are estimated based on the state of motion of the projection point of the mobile device on the moving trajectory.
- the motion estimation method may further include the step of obtaining a motion trajectory of the mobile device (not shown), for example, the method described above may be used to predict a future motion trajectory of the mobile device, or the method described above may be employed To get the motion track that the mobile device has passed, it will not be repeated here.
- the position point of the mobile device is P1
- the projection point of the position point on the motion trajectory L can be defined as the intersection point of the straight line P1 and the vertical line L
- the projection point can be expressed as Pttl( Pl ,L) .
- the moving direction of the mobile device is represented by t( a , b ), which indicates that the mobile device will advance along the direction of the motion trajectory; assuming that the motion rate of the mobile device is represented by V, it can be calculated by calculating the sampling position of the mobile device in the motion trajectory L The distance between the projected points on the upper to calculate the rate of motion.
- the mobile handover management method may further include the step of grouping a plurality of mobile devices having the same motion feature into the same mobile device group, and in the subsequent cell handover, the mobile A plurality of mobile devices in the device group perform cell handover in groups.
- a plurality of user devices such as a mobile phone or a portable computer and a tablet computer accessing a communication network
- a mobile device having the same motion characteristics belong to a mobile device having the same motion characteristics.
- Based on the same motion characteristics it can be inferred that these mobile devices have the same wireless access requirements, so they can be switched in groups.
- 16 is a diagram showing one example of a method of grouping a plurality of mobile devices having the same motion characteristics into the same mobile device group, according to one embodiment.
- step 1622 motion characteristics of a plurality of mobile devices (e.g., sample position points, motion directions, motion speeds, etc. that have passed) are acquired.
- the motion characteristics of each mobile device can be obtained or estimated using the methods described above and will not be repeated here.
- step 1624 a plurality of mobile devices having the same motion characteristics are grouped into the same mobile device group. As a specific example, it can be determined whether the distance between the mobile devices remains substantially consistent at a plurality of times, and if so, it is determined that the mobile devices have the same motion characteristics.
- the time sequence t ⁇ , ..., t n of the location of the sampling point sequence mobile device 1 and the mobile device 2 respectively ⁇ ⁇ ⁇ ⁇ ., ⁇ and 1, 2, ..., ⁇ .
- Pl l represents the distance between the mobile device 1 and the mobile device 2 at the time
- the expectation of the difference variable of the distance can be denoted as E(l Pl - Pl l)
- the variance can be recorded as Var(l Pl - Pl l)
- the expectation and the variance are respectively smaller than the preset thresholds ⁇ ⁇ and ⁇ ⁇ ⁇ , that is, satisfying E(l Pl - ⁇ ⁇ ) ⁇ ⁇ ⁇ and Var(lp 1 -p 1 l) ⁇ 6var» means mobile device 1 and moving
- the distance difference between the devices 2 is small and constant, and it can be judged that the two are moving with the same motion feature.
- FIG. 17 is a schematic block diagram showing a mobile handover management device 1700 in a wireless communication network in accordance with one embodiment.
- the mobile switching management device 1700 can implement the mobile switching management method shown in FIG.
- the mobile handover management device can be a mobile handover management entity in a wireless communication network or can be part of the mobile handover management entity.
- the mobile handover management apparatus includes an alternative cell determining apparatus 1703 and a target cell determining apparatus 1705.
- the candidate cell determining means 1703 selects a plurality of candidate switching cells through which the motion trajectory is to be routed in the wireless communication network based on the predicted motion trajectory of the mobile device.
- the selected plurality of alternate handover cells form an alternate handover cell sequence for the mobile device.
- the future motion trajectory of the mobile device can be obtained in a variety of ways.
- the motion trajectory of the mobile device can be obtained by navigation information.
- the future motion track of the mobile device can be predicted by the existing motion track of the mobile device.
- the method of the above described with reference to FIG. 2 or FIG. 3 may be employed to predict the motion trajectory of the mobile device, which is not repeated here.
- the prediction of the motion trajectory of the mobile device can be performed by the mobile handover management device.
- the mobile handover management device 1700 can also be used for trajectory prediction means (not shown) for predicting the motion trajectory of the mobile device.
- the future motion trajectory of the mobile device may also be predicted by other related devices (such as the mobile device itself or a GPS device capable of providing navigation information or GPS information about the mobile device, etc.) and sent to the mobile switching management device. 1700. .
- Each candidate handover cell in the alternate handover cell sequence is a motion trajectory of the mobile device The cell that will pass.
- an alternate handover cell sequence is formed.
- a variety of methods can be employed to select an alternate handover cell sequence.
- the candidate cell determining means 1703 may select the alternate switching cell using the method described above with reference to Figures 4-7, and will not be repeated here.
- the target cell determining apparatus 1705 is configured to generate a target handover cell sequence of the mobile device according to the motion speed, the motion direction, and the candidate handover cell sequence of the mobile device, where the target handover cell sequence may include the The mobile device moves the plurality of target handover cells to which the mobility handover is performed along the motion trajectory.
- the target cell determining means 1705 can employ various methods to obtain information on the moving speed and direction of motion of the mobile device. For example, information about the speed of motion and the direction of motion may be reported by the mobile device to the serving cell or the mobile handover management entity. As another example, the method of motion described above with reference to Figure 15 can be used to estimate the direction of motion and the speed of motion of the mobile device, and will not be repeated here. In addition, the target cell determining apparatus 1705 may use various methods to generate a target handover cell. For example, the target handover cell may be generated by using the method described above with reference to FIG. 8-12, which is not repeated here.
- the mobile handover management device can notify each target handover cell involved in the sequence of information about the mobile device.
- the mobile device may sequentially switch to each target handover cell according to the target handover cell sequence.
- FIG. 18 shows an example of the structure of the alternative cell determining apparatus 1703.
- the candidate cell determining means 1703 may include a distance obtaining unit 1813 and a selecting unit 1815.
- the distance obtaining unit 1813 is configured to obtain a distance from the base station of each cell in the wireless communication network to the motion track
- the selecting unit 1815 is configured to select a cell whose distance to the motion track is smaller than the coverage radius thereof, as the candidate switching.
- An alternate handover cell in the cell sequence may also select an alternate geographic area along the predicted motion trajectory.
- the distance obtaining unit 1813 may estimate a distance from a base station of each cell in the candidate geographic area to the motion trajectory.
- the selecting unit 1815 may select a cell in the candidate geographic region whose distance to the motion track is less than its coverage radius as an alternate handover cell in the candidate handover cell sequence.
- FIG. 19 shows an example of the structure of the target cell determining means 1705.
- the target cell determining means 1705 may include a parameter estimating unit 1913, a resource estimating unit 1915, and a target selecting unit 1917.
- the parameter estimating unit 1913 may estimate time parameters such as the arrival time of the mobile device to reach each of the alternate handover cells and the dwell time to be camped in each of the alternate handover cells, based on the motion direction and the motion speed of the mobile device. These time parameters can be estimated using the methods described above and will not be repeated here.
- the resource estimation unit 1915 may calculate each candidate handover cell for the mobile according to the estimated arrival time of the mobile device to reach each candidate handover cell and the camp time to be camped in each candidate handover cell.
- the resources that the alternate handover cell can reserve for the mobile device during the dwell time are estimated, for example, based on the resource configuration of the alternate handover cell.
- the target selecting unit 1917 may select, according to the positional relationship of each candidate handover cell on the motion trajectory and according to the available resources of the mobile station by each candidate handover cell, selecting the candidate handover cell sequence. The target switches the cell.
- the target selecting unit 1917 may calculate a ratio between available resources of the respective candidate switching cells and bandwidth requirements of the mobile device as a reservation request ratio for each candidate cell, and according to the The reservation request ratio and/or the camp time is selected in each candidate handover cell.
- the parameter estimation unit 1913 may also estimate a power level required for the mobile device to move in each of the alternate handover cells, and the target selection unit 1917 may be based on the reservation request ratio, the dwell time, and One or more of the power levels select the target handover cell among respective candidate handover cells.
- the mobile handover management device may also initiate an update of the handover management after obtaining the target handover cell sequence when the mobile device moves along the predicted motion trajectory.
- FIG. 20 shows the structure of the mobile switching management device 2000 according to this specific embodiment.
- the mobile handover management device 2000 includes an alternative cell determining device 2003 and a target cell determining device 2005, and may further include an update initiating device 2007.
- the candidate cell determining means 2003 and the target cell determining means 2005 have similar functions and structures to the candidate cell determining means 1703 and the target cell determining means 1705 described above, respectively, and are not repeated here.
- the update initiating device 2007 is configured to initiate an update of the handover information upon detecting a change in the mobile device or the handover cell.
- the update initiating device 2007 instructs the trajectory prediction device 2001 to re-predict the motion trajectory of the mobile device.
- the trajectory prediction device 2001 can re-predict the motion trajectory using the method described above with reference to Figures 2-3, which is not repeated here.
- the update initiating device 2007 may instruct the target cell determining device 2005 (the parameter estimating unit) to re-estimate the time parameter such as the arrival time and/or the dwell time of the mobile device to reach each target switching cell. And recalculate the target switching cell sequence.
- the update initiating device 2007 may instruct the target cell determining device 2005 (parameter estimation unit) to recalculate the available resources of the handover cell and the mobile device.
- the mobile handover management device described above can be applied to a scenario in which a mobile device switches between cells having the same Radio Access Technology (RAT).
- RAT Radio Access Technology
- the candidate cell determining apparatus 1703 or 2003 can also determine whether the radio access technology and frequency transmission of each candidate handover cell are available for mobile.
- the device uses, if so, it is reserved in the alternate handover cell sequence, otherwise it is not retained in the alternate handover cell sequence.
- the radio access technology and the spectrum available for the mobile device are selected as alternate handover cells to form an alternate handover cell sequence of the mobile device.
- the mobile switching management device can be applied to an application scenario in which a mobile device switches between cells having different radio access technologies (that is, an application scenario in which the wireless communication network includes cells having different radio access technologies), and the mobile switching management device is adopted by the mobile switching management device.
- mobile switching management can be performed through a backbone network.
- the device 1700 or 2000 is connected to each wireless communication network. That is, the mobile switching management device and each wireless communication network can exchange information through the backbone network.
- the mobile switching management device 1700 or 2000 can store wireless access technologies related to each cell. Information and information about the frequency of each cell and its changes (such as stored in its database or other types of storage devices (not shown)), when in use Extract this information from the storage device or database.
- the mobile handover management device may exchange information with each wireless communication network through the backbone network, and the exchanged information may include information about available radio access technologies of the relevant cell (such as an alternate handover cell) and transmission resources of the associated handover cell and Information about its changes.
- the mobile handover manager may further include information acquiring means (not shown in the figure) for obtaining information of radio access technologies supported by the relevant cell (such as an alternate handover cell) and the used transmission resources through the backbone network. (and its changes) related information.
- the target handover in a scenario of vertical handover, when the radio access technology and the frequency of the available handover cell change, if the communication cannot be supported by the mobile device, the target handover must be regenerated. Cell sequence. If the radio access technology and frequency of the alternate handover cell are changed but the communication of the mobile device can also be supported, the reserved bandwidth reserved for the mobile device can be recalculated. If the reserved bandwidth is changed compared to the previously calculated reserved bandwidth, the target switching cell sequence needs to be recalculated.
- a motion estimation device that estimates (calculates) motion characteristics of a mobile device in motion (e.g., including motion speed and direction of motion) is also provided.
- Figure 21 illustrates a motion estimation device 2100 that estimates motion characteristics of a mobile device, in accordance with one embodiment.
- the motion estimating apparatus 2100 includes a trajectory obtaining means 2105 and an estimating means 2107.
- the estimating means 2107 may include a projection device 2101 and a motion estimating device 2103.
- the trajectory obtaining means 2105 is for obtaining a motion trajectory of the mobile device, for example, the method shown in Fig. 2 or Fig. 3 can be used to obtain the motion trajectory.
- the motion trajectory can also be predicted in a similar manner to the trajectory prediction apparatus 1701 or 2001, and will not be repeated here.
- the estimating means 2107 is for estimating the moving direction and the moving speed of the mobile device based on the moving state of the projection point of the mobile device on the moving trajectory.
- Projection device 2101 is for projecting the current position of the mobile device onto the predicted motion trajectory.
- the motion parameter estimating means 2103 is for estimating the moving direction and the moving speed of the mobile device based on the moving state of the projection point of the mobile device on the moving trajectory.
- the motion parameter estimating means 2103 can estimate these motion parameters using the method described above with reference to Fig. 15, which will not be repeated here.
- the motion estimation apparatus 2100 shown in FIG. 21 can be incorporated into the above-described mobile handover management apparatus. It is part of 1700 or 2000.
- the mobile handover management device 1700 or 2000 may further include grouping a plurality of mobile devices having the same motion characteristics into a grouping device (not shown) in the same group of mobile devices, such that In the subsequent cell handover, the cell handover may be performed in groups for the plurality of mobile devices in the mobile device group.
- a plurality of user devices such as a mobile phone or a portable computer and a tablet computer accessing a communication network
- the grouping device can group a plurality of mobile devices having the same motion characteristics to the same mobile device group according to the method described above with reference to FIG.
- the packetizing device can determine whether the distance between the mobile devices remains substantially consistent at a plurality of times, and if so, determine that the mobile device has the same motion characteristics.
- the sub-assembly can determine whether the moving direction and the moving speed of each mobile device remain substantially the same at a plurality of times, and if so, it is determined that the multi-moving devices have the same motion characteristics. I won't go into details here.
- FIG. 22 illustrates a mobile device in accordance with some embodiments of the present disclosure.
- the mobile device 2200 can include a receiving device 2201 and a switching device 2203.
- the receiving device 2201 can receive a target handover cell sequence generated by the mobile handover management entity in the wireless communication network according to the predicted motion trajectory of the mobile device.
- the receiving device 2201 may receive information about the sequence from its current serving cell or may receive information about the sequence directly from the mobile handover management entity.
- the switching device 2203 can sequentially switch to each target handover cell according to the target handover cell sequence.
- a wireless communication system including the above-described mobile handover management entity or device and user equipment is also provided.
- a mobile handover management method in a wireless communication network including: determining, when a mobile device in a wireless communication network needs to perform cell handover, determining an alternate handover cell Available resources; and controlling cell handover of the mobile device based on available resources of the alternate handover cell.
- the available resources of the alternate handover cell may be determined according to the available resource determination method in the embodiment disclosed in FIG.
- the method for generating a target handover cell in the disclosed embodiment to control the cell handover of the mobile device is not repeated here.
- determining the available resources of the alternate handover cell may include: estimating a camping time period of the mobile device in the alternate handover cell and determining the alternate handover corresponding to the camp time period The available resources of the cell to the mobile device.
- controlling the cell handover of the mobile device according to the available resource condition of the alternate handover cell may include: selecting an alternate handover cell capable of providing available resources for the mobile device as a target handover of the mobile device Community.
- estimating a camping time period of the mobile device in the candidate handover cell includes: estimating, according to a motion direction of the mobile device, a motion speed, and a coverage area of the candidate handover cell, the mobile device in the standby device The camping time period in the handover cell is selected.
- a mobile handover management apparatus in a wireless communication network comprising: an available resource determination module configured to be in a wireless communication network The mobile device needs to determine the available resources of the alternate handover cell when performing cell handover; and the handover control module is configured to control the cell handover of the mobile device according to the available resource condition of the alternate handover cell.
- the available resource determining module may estimate a camping time period of the mobile device in the alternate handover cell and determine the candidate handover cell corresponding to the camping period for the mobile device Available resources.
- the handover control module selects an alternate handover cell capable of providing available resources for the mobile device as a target handover cell for the mobile device.
- the available resource determining module may estimate a dwell period of the mobile device within the alternate handover cell based on the motion direction of the mobile device, the motion speed, and the coverage of the alternate handover cell.
- the various steps of the above methods, as well as the various constituent modules and/or units of the above-described devices, may be implemented as software, firmware, hardware, or a combination thereof.
- a program constituting software for implementing the above method may be installed from a storage medium or a network to a computer having a dedicated hardware structure (for example, the general-purpose computer 2300 shown in FIG. 23), which is installed.
- a dedicated hardware structure for example, the general-purpose computer 2300 shown in FIG. 23
- a central processing unit (CPU) 2301 executes various processes in accordance with a program stored in a read only memory (ROM) 2302 or a program loaded from a storage portion 2308 to a random access memory (RAM) 2303.
- ROM read only memory
- RAM random access memory
- data required when the CPU 2301 executes various processes and the like is also stored as needed.
- the CPU 2301, the ROM 2302, and the RAM 2303 are connected to each other via a bus 2304.
- Input/output interface 2305 is also connected to bus 2304
- the following components are connected to the input/output interface 2305: an input portion 2306 (including a keyboard, a mouse, etc.), an output portion 2307 (including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker Etc.), storage portion 2308 (including hard disk, etc.), communication portion 2309 (including network interface cards such as LAN cards, modems, etc.).
- the communication section 2309 performs communication processing via a network such as the Internet.
- the drive 2310 can also be connected to the input/output interface 2305 as needed.
- a removable medium 2311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like is mounted on the drive 2310 as needed, so that the calculations read therefrom are installed into the storage portion 2308 as needed.
- a program constituting the software is installed from a network such as the Internet or a storage medium such as the removable medium 2311.
- such a storage medium is not limited to the removable medium 2311 ⁇ removable medium 2311 shown in FIG. 23 in which a program is stored and distributed separately from the device to provide a program to the user.
- Examples include disks (including floppy disk (registered trademark):), optical disks (including compact disk read only memory (CD-ROM) and digital versatile disk (DVD)), magneto-optical disks (including mini disk (MD) (registered trademark)), and semiconductors.
- the storage medium may be a ROM 2302, a hard disk included in the storage portion 2308, or the like, in which programs are stored, and distributed to the user together with the device containing them.
- a program product for storing an instruction code readable by a machine is also proposed.
- the above-described method according to an embodiment of the present disclosure can be performed when the instruction code is read and executed by a machine.
- Storage media are also included in the disclosure of the present disclosure.
- the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/649,143 US10149223B2 (en) | 2012-12-10 | 2013-11-13 | Mobile handover management method, apparatus and system in wireless communication network |
JP2014553613A JP6056874B2 (ja) | 2012-12-10 | 2013-11-13 | 無線通信ネットワークにおけるモビリティ管理方法、システム及び記録媒体 |
KR1020147018735A KR101649057B1 (ko) | 2012-12-10 | 2013-11-13 | 무선 통신 네트워크에서의 모바일 핸드오버 관리 방법, 장치 및 시스템 |
EP13861987.9A EP2840836B1 (en) | 2012-12-10 | 2013-11-13 | Method and system for mobile handover management in wireless communication network |
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JP6056874B2 (ja) | 2017-01-11 |
JP6344459B2 (ja) | 2018-06-20 |
EP2840836A1 (en) | 2015-02-25 |
CN111586783B (zh) | 2022-07-19 |
KR101649057B1 (ko) | 2016-08-17 |
EP2840836A4 (en) | 2016-01-06 |
JP2015512177A (ja) | 2015-04-23 |
CN103874149A (zh) | 2014-06-18 |
JP2017063494A (ja) | 2017-03-30 |
US20150319668A1 (en) | 2015-11-05 |
KR20140103139A (ko) | 2014-08-25 |
CN103874149B (zh) | 2020-06-09 |
US10149223B2 (en) | 2018-12-04 |
EP2840836B1 (en) | 2018-05-30 |
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