WO2013104333A1 - 获取移动终端移动速度的方法、基站及终端 - Google Patents

获取移动终端移动速度的方法、基站及终端 Download PDF

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Publication number
WO2013104333A1
WO2013104333A1 PCT/CN2013/070372 CN2013070372W WO2013104333A1 WO 2013104333 A1 WO2013104333 A1 WO 2013104333A1 CN 2013070372 W CN2013070372 W CN 2013070372W WO 2013104333 A1 WO2013104333 A1 WO 2013104333A1
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WO
WIPO (PCT)
Prior art keywords
mobile terminal
base station
serving base
cell
distance
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PCT/CN2013/070372
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English (en)
French (fr)
Inventor
蔺波
柴丽
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13736192.9A priority Critical patent/EP2804414A4/en
Publication of WO2013104333A1 publication Critical patent/WO2013104333A1/zh
Priority to US14/329,001 priority patent/US20140349658A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method, a base station and a terminal for acquiring a moving speed of a mobile terminal. Background of the invention
  • small base stations In order to further increase the system capacity, more low-power access points or small base stations (hereinafter collectively referred to as small base stations) can be introduced in the macro network.
  • small base stations For example, Home eNodeB, Micro eNodeB, pico eNodeB, Relay eNodeB, femto eNodeB RRH in Long Term Evolution (LTE) technology (Access point) such as (Remote Radio Head).
  • LTE Long Term Evolution
  • Access point such as (Remote Radio Head).
  • the hybrid networking mode of the macro base station and the small base station can enhance hotspot coverage and indoor blind spot (or weak point) coverage.
  • a hybrid network is also known as a heterogeneous network.
  • a mobile terminal such as a UE
  • it may often pass through cells of various base stations, and switching needs to be continuously performed.
  • the mobile terminal moves faster, it may instantaneously pass through a certain cell without switching.
  • the handover is performed, when the handover is completed, the mobile terminal has moved out of the switched cell, thereby causing call drop. Therefore, a method is needed to enable the serving cell to know the moving speed of the mobile terminal, so as to avoid the problem that the mobile terminal moves faster and the switching is not timely and the call is dropped.
  • the embodiment of the present invention provides a method for acquiring a mobile terminal's moving speed, a base station, and a terminal, so that the serving cell can learn the moving speed of the mobile terminal, so as to avoid the problem that the mobile terminal moves faster and the handover is not timely, resulting in dropped calls. .
  • An embodiment of the present invention provides a method for acquiring a moving speed of a mobile terminal, including: a serving base station acquiring a distance estimating parameter, where the distance estimating parameter is used to estimate a distance that the mobile terminal moves in the serving base station cell;
  • the serving base station obtains a distance that the mobile terminal moves in the serving base station cell according to the obtained distance estimation parameter
  • the serving base station obtains the moving speed of the mobile terminal in the serving base station cell by using the distance that the mobile terminal moves in the serving base station cell and the mobile terminal staying in the serving base station cell.
  • the embodiment of the present invention further provides a method for obtaining a mobile terminal moving speed, including: establishing a signaling connection with a mobile terminal;
  • the embodiment of the invention further provides a method for acquiring a moving speed of a mobile terminal, comprising: receiving a moving speed of a mobile terminal sent by a source cell base station in the source cell.
  • the embodiment of the invention further provides a method for a base station to acquire a moving speed of a mobile terminal, include:
  • the embodiment of the invention further provides a base station, including:
  • a parameter obtaining unit configured to acquire a distance estimation parameter, where the distance estimation parameter is used to estimate a distance that the mobile terminal moves within the serving base station cell;
  • a distance obtaining unit configured to obtain, according to the obtained distance estimation parameter, a distance that the mobile terminal moves in the serving base station cell;
  • a speed obtaining unit configured to use a distance that the mobile terminal moves in the serving base station cell and a mobile terminal to stay in the serving base station cell, to obtain a moving speed of the mobile terminal in the serving base station cell .
  • the embodiment of the invention further provides a base station, including:
  • a connecting unit configured to establish a signaling connection with the mobile terminal
  • An information receiving unit configured to receive information about >3 ⁇ 4 on the mobile terminal by using a signaling connection established with the mobile terminal;
  • a moving speed obtaining unit configured to obtain a moving speed of the mobile terminal by using the information reported by the mobile terminal.
  • the embodiment of the invention further provides a base station, including:
  • the receiving unit is configured to receive a moving speed of the mobile terminal sent by the source cell base station in the source cell. Obtaining the distance estimation parameter and obtaining the moving speed of the mobile terminal by using the distance estimation parameter, or obtaining the moving speed of the mobile terminal by using the information reported by the mobile terminal, or receiving the moving speed of the mobile terminal from other base stations, so that the base station learns the mobile terminal by The speed of movement is avoided, and the problem of dropped calls due to untimely switching caused by the faster moving speed of the mobile terminal is avoided.
  • FIG. 1 is a flowchart of a method for acquiring a mobile terminal's moving speed according to an embodiment of the present invention
  • FIG. 2A is a schematic diagram of a mobile terminal
  • 2B is a schematic diagram of another mobile route of the mobile terminal
  • FIG. 3 is a flowchart of a method for acquiring a moving speed of a mobile terminal according to an embodiment of the present invention; a corresponding relationship between a received power of a signal and a distance between a UE and a serving base station;
  • FIG. 4B is an embodiment of the present invention; Providing the mobile terminal ⁇
  • FIG. 4C is a schematic diagram of obtaining a mobile terminal according to an embodiment of the present invention.
  • FIG. 4D is a schematic diagram of obtaining a mobile terminal according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of still another method for obtaining a moving speed of a mobile terminal according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. Mode for carrying out the invention
  • FIG. 1 is a flow chart of a method for obtaining a moving speed of a mobile terminal according to an embodiment of the present invention. As shown in FIG. 1, the method for obtaining the moving speed of the mobile terminal includes:
  • Step 11 The serving base station acquires a distance estimation parameter, where the distance estimation parameter is used to estimate a distance that the mobile terminal moves within the serving base station cell;
  • Step 12 The serving base station obtains, according to the obtained distance estimation parameter, a distance that the mobile terminal moves in the serving base station cell.
  • Step 13 The serving base station obtains a moving speed of the mobile terminal in the serving base station cell by using a distance that the mobile terminal moves in the serving base station cell and a dwell time of the mobile terminal in the serving base station cell.
  • the route that the mobile terminal actually moves in a cell is uncertain, as shown in Fig. 2A and Fig. 2B.
  • the mobile terminal traverses a cell radially, with a greater distance of movement in the cell.
  • the mobile terminal tangentially passes through a cell in which the distance moved is small.
  • the moving speed of the mobile terminal in FIG. 2A is higher than the moving speed of the mobile terminal in FIG. 2B.
  • the serving base station can obtain the distance that the mobile terminal moves in the serving base station cell by identifying the moving route of the mobile terminal in the serving base station cell, such as tangentially passing through or radially through the serving base station cell.
  • the reference signal receiving power (RSRP) of the serving base station is measured from weak to strong, and then weak. Then, as shown in FIG. 2B, when the mobile terminal tangentially passes through the serving base station cell, the service is measured.
  • the RSRP of the base station is weak to weak, and then weak.
  • the mobile terminal's moving route can be considered to be from the cell edge to the cell center to the cell edge.
  • the mobile terminal's moving route can be considered to be always moving at the cell edge. It can be seen that in FIG. 2A, the mobile terminal moves the longest distance in the illustrated serving base station cell. In FIG. 2B, the mobile terminal moves the distance in the illustrated serving base station cell to the shortest. When the mobile terminal moves on other routes, the distance traveled in the cell is between the two. It can be concluded that the larger the received power of the maximum downlink signal received by the mobile terminal, the longer the large distance traveled in the cell.
  • the serving base station obtains the distance that the mobile terminal moves in the serving base station cell by estimating the signal strength, such as the downlink signal receiving power of the base station measured by the UE or the base station measuring the uplink signal receiving power of the UE, that is, the distance that the mobile terminal passes in the serving base station cell. distance.
  • the parameters used to estimate the distance that the mobile terminal moves in the serving base station cell are referred to as distance estimation parameters for convenience of description.
  • the distance estimation parameter can be a minimum value, or a maximum value, or a statistical average value, or some typical values.
  • the most basic signal used may be that the UE measures the downlink signal of the base station, or the base station measures the uplink signal of the UE. Bright.
  • the distance estimation parameter is the maximum downlink signal receiving power
  • the mobile terminal is the UE.
  • the method for obtaining the moving speed of the mobile terminal is as shown in FIG. 3, including: Step 31: The serving base station acquires the maximum downlink signal received power that the UE reports by reporting.
  • the downlink signal is a signal that the serving base station sends to the UE.
  • the trigger threshold of the plurality of measurement reports is configured.
  • the UE reports the received power measurement value of the current serving base station.
  • the base station takes the largest one as the maximum downlink signal received power according to one or several received power measurement values reported by the UE.
  • the UE periodically reports the current downlink signal receiving power measurement value according to the reporting period.
  • the downlink signal is a signal sent by the serving base station to the UE.
  • the base station receives the measured value of the received power of one or several downlink signals reported by the UE, and takes the largest one of the measured values as the maximum downlink signal received power.
  • Step 32 Obtain a distance that the UE moves in the serving base station cell according to the obtained maximum downlink signal received power. There are several ways to do this:
  • the first method obtains the distance corresponding to the maximum downlink signal received power obtained in step 31 according to the corresponding change relationship between the maximum downlink signal received power and the distance between the UE and the serving base station as shown in FIG. 4A.
  • the radius of the serving base station cell is a known one.
  • the second method uses the first method to obtain the distance that the UE moves in the serving base station cell, and forms empirical data. Specifically, for example, a maximum downlink signal received power and a UE obtained according to the maximum downlink signal received power are in the serving base station cell. The distance of the middle movement is saved correspondingly, and the correspondence table of the two is obtained, as shown in Table 1.
  • the third method uses the formula:
  • the distance that the UE moves in the serving base station cell is obtained.
  • the base station transmit power and the cell radius are known to the serving base station, and the maximum downlink signal received power is a variable, which is obtained in step 31.
  • the fourth method as shown in FIG. 4C, first obtains the angular velocity of the UE, and then obtains the distance that the UE moves in the serving base station cell according to the received power of the maximum downlink signal and the angular velocity of the acquired UE.
  • the angular velocity can be obtained by the following methods:
  • the serving base station acquires the direction of the beam of the uplink signal (Angle Of Arrive, AOA) at two times, and obtains the angle of the AOA.
  • the angular velocity the angle of the AOA at two times/two The time difference between the moments.
  • the arc length that is, the moving distance of the UE.
  • the arc length which is the moving distance of the UE.
  • the distance that the UE moves in the serving base station cell can be calculated by the following formula:
  • the distance that the UE moves in the serving base station cell the distance that the UE is closest to the base station X angular velocity X
  • the distance that the UE is closest to the serving base station can be obtained according to the maximum downlink signal received power.
  • the fifth method considers that the UE may exhibit a curve motion in the cell, and uses the fourth method to segmentally calculate the distance that the UE moves in the serving base station cell, so as to more accurately estimate the distance that the UE moves in the serving base station cell, thereby more accurately Evaluate the speed of movement of the UE in the serving base station cell.
  • the serving base station cuts the path that the UE moves in the serving base station cell into three segments: XI, X2, and X3, and then uses the fourth method to calculate the length of each segment, and then obtains the UE in the serving base station.
  • the network side device such as the base station, the positioning server, and the configuration management entity collects the geographical location information and the signal characteristic information of the location (the information of the maximum downlink signal receiving power) and the corresponding cell identifier, forms a radio frequency fingerprint database, and performs storage.
  • the form of the radio frequency fingerprint database is specifically a signal feature of each location in the coverage area of the cell: RSRP, RSRQ, etc., and a list of cell identifiers corresponding to each location (latitude and longitude) and each location. Since there may be multiple cells in a location, there may be multiple cell identities corresponding to one location, i.e., one location may correspond to a list of cell identities.
  • the base station acquires downlink signal received power information and a list of corresponding cell identifiers in the serving cell reported by the UE. Then, by looking up the radio frequency fingerprint database, the location of the corresponding UE can be obtained. According to the information reported by the UE twice (the downlink signal receiving power information and the list of cell identifiers), two geographical locations are obtained, and the distances that the UE moves in the serving base station cell are obtained by using the two geographical locations.
  • Step 33 The serving base station uses the time interval for the UE to report the measurement report twice, and the foregoing The distance that the UE obtained in step 32 moves in the serving base station cell obtains the moving speed of the UE in the serving base station cell. Specifically, the distance that the UE moves in the serving base station cell is divided by the time interval during which the UE reports the measurement report twice.
  • the UE may report the measurement report twice, for example, when the cell enters the cell leaving the cell, or any two points in the middle of the serving cell, or the serving base station in step 31 triggers the measurement configuration reported by the UE to report the measurement report.
  • the method further includes the step 34: the serving base station may transmit the calculated moving speed of the UE to the target cell when the UE switches.
  • the target cell can refer to the previous speed information of the UE for handover optimization or UE speed estimation.
  • Speed estimation refers to processing the speed of the UE before and the current estimated speed, such as weighted average or smooth estimation.
  • the switching optimization may specifically be performed according to the speed of the UE indicated by the source cell, performing admission control, scheduling optimization, and the like.
  • the admission control may be that if the moving speed of the UE is very fast, and the coverage of the target cell is small, the target cell may refuse to accept the UE; the scheduling optimization may be if the moving speed of the UE is very fast, and the target cell is accessing High-speed UEs can use a conservative modulation coding rate (MCS) to overcome channel variations at high speeds.
  • MCS modulation coding rate
  • This embodiment is similar to the first embodiment except that the distance estimation parameter is the maximum uplink signal received power received by the base station from the UE side.
  • the distance moved by the UE in the serving base station cell is obtained, and the distance moved by the UE in the serving base station cell is divided.
  • the moving speed of the UE in the serving base station cell can be obtained by the time that the UE stays in the serving base station cell.
  • empirical data may be formed, such as a maximum uplink signal received power and a distance moved by the UE in the serving base station cell according to the maximum uplink signal received power, to obtain a correspondence table between the two, so as to be calculated later
  • the UE moves in the cell it only needs to obtain the maximum uplink signal receiving power, and then find the empirical data to obtain the UE.
  • the moving distance in the cell, and then dividing by the time the UE stays in the cell, can obtain the moving speed of the UE in the cell.
  • This embodiment is similar to the above-described embodiment 1, except that the distance estimation parameter is the average downlink signal reception power.
  • the average downlink signal received power is calculated by the maximum downlink signal received power
  • the correspondence between the average downlink signal received power and the maximum downlink signal received power, and the correspondence between the maximum downlink signal received power and the UE to the serving base station can be utilized. Or the corresponding relationship between the maximum downlink signal received power and the moving distance of the UE in the cell, and the moving distance of the UE in the cell is obtained, and then the time that the UE stays in the cell is obtained, and the moving speed of the UE in the cell is obtained.
  • This embodiment is similar to the first embodiment described above except that the distance estimation parameter is the minimum downstream path loss.
  • the correspondence between the minimum downlink path loss and the maximum downlink signal received power and the correspondence between the maximum downlink signal received power and the distance from the UE to the serving base station can be utilized.
  • the corresponding relationship between the maximum downlink signal received power and the moving distance of the UE in the cell obtains the moving distance of the UE in the cell, and further divides the time that the UE stays in the cell, and obtains the moving speed of the UE in the cell.
  • the embodiment provides another method for obtaining the moving speed of the mobile terminal, including: establishing a signaling connection with the mobile terminal;
  • a moving speed when the idle state reported by the mobile terminal is received.
  • the execution entity is a serving base station of the mobile terminal.
  • the embodiment further provides a method for the base station to acquire the moving speed of the mobile terminal, including:
  • the serving base station And transmitting information to the serving base station by using a signaling connection established with the serving base station, so that the serving base station obtains a moving speed of the mobile terminal according to the information.
  • the speed of movement in the idle state reported to the serving base station by a signal connection with the serving base station.
  • the information of the reselected cell transmitted to the serving base station and the dead time at the selected cell, such as by a signaling connection with the serving base station.
  • FIG. 5 is a flow chart of still another method for obtaining a moving speed of a mobile terminal according to an embodiment of the present invention. As shown in Figure 5, the process is as follows:
  • Step 51 The speed of the Idle state is evaluated by the UE in the idle state.
  • Step 52 The UE informs the serving cell of the speed in the Idle state by using a signaling connection with the serving cell.
  • the UE transmits the speed estimate of its own Idle state to the base station through a signaling connection with the base station.
  • the base station can know the speed of the current UE, especially when transitioning from the idle state to the connected state, and immediately know the speed of the UE, that is, the speed of the Idle state is used as the speed of the connected state.
  • the base station can also know the speed of the UE when the UE transitions to the connected state. For example, in the UE Idle state, three cell reselections occur within 60s. Assuming that the speed is evaluated according to the speed, the UE transmits the "high speed" to the base station on the signaling connection with the base station.
  • the UE may report the information of the reselected cell and the staying time of the selected cell to the serving base station, so that the serving base station may use the number of times of cell reselection and the time used for reselection to obtain the moving speed of the UE.
  • the information of the reselected cell may be a cell identifier (ID), a cell type. Wait.
  • ID may be, for example, a cell size or the like.
  • the UE may use the type information of the cell (such as a macro cell/Pico cell/Femto cell/, a cell transmit power information, a large cell/small cell/small cell, and the type information may be specifically obtained from the broadcast information of the cell, that is, the base station. At least one of the information that the side needs to broadcast the information, the identity of the cell, and the time of staying in each cell is sent to the serving base station, and the serving base station can use the information to obtain the moving speed of the UE in the idle state.
  • the base station obtains the information, such as the number of times of cell reselection reported by the UE and the time used for reselection, and then transmits the information to the neighboring base station when the handover is subsequently initiated.
  • the serving base station may add the above information to the UE history information list.
  • the neighboring base station can know the information when the UE is in the Idle state, such as the staying time of each cell, the identity of the cell, the type of the cell, how many reselections occur, and so on, so that the neighboring base station can be based on The above information knows the current moving speed of the UE more accurately.
  • the neighboring base station estimates the historical moving speed of the UE according to the cell size information and the connection duration.
  • Step 53 After the serving cell learns the speed of the UE, performs Radio Resource Management (RRM).
  • RRM Radio Resource Management
  • the process of this embodiment may further include the step 54:
  • the serving base station transmits the acquired moving speed of the UE to the target cell when the UE is switched.
  • the serving base station transmits the acquired moving speed of the UE to the target cell when the UE is switched.
  • the serving base station acquires from the source cell base station before the UE handover. Specifically, as shown in the first embodiment and the fifth embodiment, the serving base station sends the acquired mobile terminal to the target cell base station that is switched by the UE, and the serving base station in this embodiment can be regarded as the target cell in the first embodiment and the fifth.
  • the base station correspondingly the source cell base station, can be regarded as the serving base station in Embodiments 1 and 5.
  • the method for obtaining the speed of the UE by the source cell is not limited to the methods in the foregoing Embodiment 1 to Embodiment 5, and may be other methods as long as the moving speed of the UE can be obtained.
  • the serving base station performs handover optimization or speed estimation according to the moving speed before the UE handover, that is, the moving speed of the UE obtained from the source cell base station.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station provided in this embodiment is used to implement the method in the embodiment shown in FIG. 1.
  • the serving base station of the UE includes: a parameter obtaining unit 61, a distance obtaining unit 62, and a speed acquiring unit 63.
  • the base station provided in this embodiment should also include basic functional units of a base station such as radio frequency processing. Since it is not the focus of the present invention, it will not be described herein.
  • the parameter acquisition unit 61 is configured to acquire a distance estimation parameter, and the distance estimation parameter is used to estimate a distance that the mobile terminal moves within the serving base station cell.
  • the distance obtaining unit 62 is configured to obtain, according to the obtained distance estimation parameter, a distance that the mobile terminal moves in the serving base station cell.
  • the speed obtaining unit 63 is configured to obtain the moving speed of the mobile terminal in the serving base station cell by using the distance that the mobile terminal moves in the serving base station cell and the mobile terminal staying in the serving base station cell.
  • the distance estimation parameter may be a maximum uplink signal receiving power, an average uplink signal receiving power, a maximum downlink signal receiving power, an average downlink signal receiving power, a minimum downlink path loss, an average downlink path loss, a minimum uplink path loss, or an average. For details, refer to the description in the above method embodiment.
  • the parameter obtaining unit 61 is specifically configured to receive the maximum downlink signal received power that the mobile terminal reports by reporting.
  • the base station provided by the embodiment of the present invention may further include: a configuration unit, configured to: after the parameter obtaining unit receives the maximum downlink signal received power of the mobile terminal, the measurement configuration triggers a threshold or a reporting period for the measurement configuration of the mobile terminal.
  • the parameter obtaining unit may include: a downlink power receiving subunit and a maximum power selecting subunit.
  • the downlink power receiving subunit is configured to receive the downlink signal receiving power reported by the mobile terminal when the downlink signal receiving power meets the trigger threshold, or receive the downlink signal receiving power periodically reported by the mobile terminal according to the reporting period.
  • the maximum power selection subunit is configured to select the largest downlink signal reception power from the received downlink signal reception power as the maximum downlink signal reception power.
  • the distance obtaining unit may include: a current distance acquiring subunit and a first moving distance acquiring subunit.
  • the current distance obtaining subunit is configured to obtain a current distance between the mobile terminal and the serving base station according to the maximum downlink signal receiving power and the distance between the mobile terminal and the serving base station.
  • the first moving distance acquisition subunit is configured to obtain the distance that the mobile terminal moves in the serving base station cell by using the current distance and the Pythagorean law.
  • the base station provided by the embodiment of the present invention may further include: a relationship holding unit, configured to: after the distance acquiring unit obtains the distance moved by the mobile terminal in the serving base station cell according to the obtained distance estimation parameter, the maximum downlink signal The received power is stored in correspondence with the obtained distance that the mobile terminal moves in the serving base station cell.
  • the empirical value can be obtained for the subsequent speed operation by storing the correspondence between the maximum downlink signal received power and the obtained distance of the mobile terminal moving in the serving base station cell.
  • the distance obtaining unit may be specifically configured to find a distance that the mobile terminal moves in the serving base station cell according to a correspondence between a stored maximum downlink signal received power and a distance that the mobile terminal moves in the serving base station cell. Or the distance obtaining unit may be specifically configured to divide the maximum downlink signal received power by a signal transmit power of the serving base station, and multiply the cell radius of the serving base station cell, to obtain that the mobile terminal is in the The distance moved in the serving base station cell.
  • the distance acquiring unit may include: an angular velocity acquiring subunit and a second moving distance acquiring subunit.
  • An angular velocity acquisition subunit is configured to obtain an angular velocity of the mobile terminal according to the maximum downlink signal received power; and a second moving distance acquisition subunit is configured to obtain, by using the angular velocity, a distance that the mobile terminal moves in the serving base station cell.
  • the distance obtaining unit may include: a location acquiring subunit and a third moving distance obtaining subunit.
  • the location acquisition subunit is configured to acquire corresponding geographic location information of the mobile terminal while receiving the downlink signal received power reported by the mobile terminal; and the third mobile distance acquisition subunit is configured to obtain the mobile by using the geographic location information The distance that the terminal moves in the serving base station cell.
  • the base station provided by the embodiment of the present invention may further include: a sending unit, configured to send the moving speed of the mobile terminal to a base station of the target cell.
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • the base station provided in this embodiment is used to implement the method shown in the foregoing embodiment 5. As shown in FIG. 7, the method includes:
  • the base station provided in this embodiment should also include basic functional units of a base station such as radio frequency processing. Since it is not the focus of the present invention, details are not described herein again.
  • the connection unit 71 is configured to establish a signaling connection with the mobile terminal; the information receiving unit 72 is configured to receive the information reported by the mobile terminal by using a signaling connection established with the mobile terminal.
  • the moving speed obtaining unit 73 is configured to obtain the moving speed of the mobile terminal by using the information reported by the mobile terminal.
  • the information receiving unit 72 is specifically configured to receive, by using a signaling connection with the mobile terminal, The moving speed of the idle state reported by the mobile terminal. Or the information receiving unit 72 may be specifically configured to receive the number of cell reselection times and the time for reselection sent by the mobile terminal; correspondingly, the moving speed acquiring unit 73 may be specifically configured to use the number of cell reselection times. And the time taken for the reselection to obtain the moving speed of the mobile terminal.
  • the base station provided by the embodiment of the present invention may further include: a sending unit, configured to send the information reported by the mobile terminal to the neighboring base station.
  • the base station provided by the embodiment of the present invention may further include: a management unit, configured to perform radio resource management according to the obtained moving speed.
  • FIG. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • the mobile terminal provided in this embodiment is used to implement the method for enabling the base station to acquire the moving speed of the mobile terminal, as shown in FIG. 7, which includes a connecting unit 81 and a reporting unit 82, and the connecting unit 81 is used for
  • the serving base station establishes a signaling connection;
  • the reporting unit 82 is configured to report information to the serving base station by using a signaling connection established with the serving base station, so that the serving base station obtains a moving speed of the mobile terminal according to the information.
  • the reporting unit 82 may be specifically configured to use a mobile terminal to report the idle speed of the idle state when reporting to the serving base station, or may be specifically used to send to the serving base station by using a signaling connection with the serving base station. Reselect the information of the cell and the stay time in the selected cell. It should be understood by those skilled in the art that the mobile terminal provided by this embodiment should also include basic functional units of the mobile terminal, such as signal receiving and radio frequency processing. Since it is not the focus of the present invention, details are not described herein again.
  • the base station provided by the embodiment of the present invention includes: a receiving unit, configured to receive a moving speed of the mobile terminal sent by the source cell base station in the source cell.
  • a receiving unit configured to receive a moving speed of the mobile terminal sent by the source cell base station in the source cell.
  • the base station provided by this embodiment should also include the basic functional units of the base station such as radio frequency processing. Since it is not the focus of the present invention, it will not be further described herein.
  • the base station provided by the embodiment of the present invention may further include: a speed estimating unit, configured to evaluate, according to the received moving speed of the mobile terminal in the source cell, a speed of the mobile terminal.
  • a speed estimating unit configured to evaluate, according to the received moving speed of the mobile terminal in the source cell, a speed of the mobile terminal.

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  • Mobile Radio Communication Systems (AREA)

Abstract

本发明涉及一种获取移动终端移动速度的方法、基站及终端,通过获取距离估算参数并利用距离估算参数获得移动终端的移动速度,或者通过移动终端上报的信息获得移动终端的移动速度,或者通过从其他基站接收移动终端的移动速度,使得基站由于获知移动终端的移动速度,而避免因移动终端移动速度较快导致的切换不及时而产生掉话的问题。

Description

获取移动终端移动速度的方法、 基站及终端 本申请要求于 2012 年 1 月 11 日提交中国专利局、 申请号为 201210008529.9、发明名称为"获取移动终端移动速度的方法、基站及终端 " , 及于 2012年 1月 12 日提交中国专利局、 申请号为 201210008689.3、 发明 名称为 "获取移动终端移动速度的方法、 基站及终端" 的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及移动通信技术, 尤其涉及一种获取移动终端移动速度的方 法、 基站及终端。 发明背景
随着移动宽带的发展, 终端用户的带宽需求也越来越多, 而现有的以 宏网络为主的组网方式, 将无法满足移动宽带业务所需要的比特速率。
为了进一步提升系统容量, 可以在宏网络范围内引入更多低功率接入 点或者小基站 (下面统一称为小基站)。如长期演进 ( Long Term Evolution, LTE )技术中的家庭基站( Home eNodeB )、 微基站( micro eNodeB )、 微微 基站( pico eNodeB )、中继基站( Relay eNodeB )、超微微基站( femto eNodeB ) RRH ( Remote Radio Head, 远端射频头)等接入点 ( access point )。
由于小基站的发射功率小于宏基站的发射功率, 下行覆盖范围远小于 宏基站的下行覆盖范围, 因此, 宏基站与小基站的混合组网方式可以增强 热点区域覆盖、 室内盲点 (或弱点)覆盖、 宏基站的小区边缘覆盖, 提升 小区平均吞吐量、 小区边缘吞吐量、 小区的上行 /下行频谱利用率、 降低网 络成本及运营商的 CAPEX(capital expenditure)等,宏基站与小基站的组成的 混合网络也称为异构网络。 当移动终端如 UE在异构网络中移动时, 可能会经常经过各种基站的 小区, 而需要不断的发生切换。 但是当移动终端移动速度较快时, 可能瞬 间穿过某一小区, 而无需切换, 假若进行切换, 则切换完成时, 移动终端 已移出所切换到的小区, 从而导致掉话。 因此, 需要一种方法使得服务小 区能够获知移动终端的移动速度, 以避免移动终端移动速度较快导致的切 换不及时而产生掉话的问题。 发明内容
本发明实施例提出一种获取移动终端移动速度的方法、 基站及终端, 以使得服务小区能够获知移动终端的移动速度, 以避免移动终端移动速度 较快导致的切换不及时而产生掉话的问题。
本发明实施例提供了一种获取移动终端移动速度的方法, 包括: 服务基站获取距离估算参数, 所述距离估算参数用于估算移动终端在 所述服务基站小区内移动的距离;
服务基站根据获取的所述距离估算参数得到所述移动终端在所述服务 基站小区中移动的距离;
服务基站利用所述移动终端在所述服务基站小区中移动的距离及所述 移动终端在所述服务基站小区内停留时间, 得到所述移动终端在所述服务 基站小区中的移动速度。
本发明实施例还提供了一种获取移动终端移动速度的方法, 包括: 与移动终端建立信令连接;
通过与所述移动终端建立的信令连接接收所述移动终端上报的信息获 得所述移动终端的移动速度。
本发明实施例还提供了一种获取移动终端移动速度的方法, 包括: 接收源小区基站发送的移动终端在所述源小区中的移动速度。
本发明实施例还提供了一种用于基站获取移动终端移动速度的方法, 包括:
与服务基站建立信令连接;
通过与服务基站建立的信令连接向所述服务基站上报信息, 以使所述 服务基站根据所述信息获得移动终端的移动速度。
本发明实施例还提供了一种基站, 包括:
参数获取单元, 用于获取距离估算参数, 所述距离估算参数用于估算 移动终端在服务基站小区内移动的距离;
距离获取单元, 用于根据获取的所述距离估算参数得到所述移动终端 在所述服务基站小区中移动的距离;
速度获取单元, 用于利用所述移动终端在所述服务基站小区中移动的 距离及所述移动终端在所述服务基站小区内停留时间, 得到所述移动终端 在所述服务基站小区中的移动速度。
本发明实施例还提供了一种基站, 包括:
连接单元, 用于与移动终端建立信令连接;
信息接收单元, 用于通过与所述移动终端建立的信令连接接收所述移 动终端上 >¾的信息;
移动速度获取单元, 用于通过所述移动终端上报的信息获得所述移动 终端的移动速度。
本发明实施例还提供了一种基站, 包括:
接收单元, 用于接收源小区基站发送的移动终端在所述源小区中的移 动速度。 过获取距离估算参数并利用距离估算参数获得移动终端的移动速度, 或者 通过移动终端上报的信息获得移动终端的移动速度, 或者通过从其他基站 接收移动终端的移动速度, 使得基站由于获知移动终端的移动速度, 而避 免因移动终端移动速度较快导致的切换不及时而产生掉话的问题。 附图简要说明
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例中所 需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动 性的前提下, 还可以根据这些附图获得其他的附图。
图 1 为本发明实施例提供的一种获取移动终端移动速度的方法的流程 图 2A为移动终端的一种移动路线示意图;
图 2B为移动终端的另一种移动路线示意图;
图 3 为本发明实施例提供的另一种获取移动终端移动速度的方法的流 程图; 行信号接收功率和 UE与服务基站之间的距离的对应变化关系曲线图; 图 4B为本发明实施例提供的获取移动终^
在服务基站小区中移动的距离的一种原理图
图 4C为本发明实施例提供的获取移动终^
在服务基站小区中移动的距离的另一种原理图
图 4D为本发明实施例提供的获取移动终^
在服务基站小区中移动的距离的又一种原理图;
图 5 为本发明实施例提供的又一种获取移动终端移动速度的方法的流 程图;
图 6为本发明实施例提供的一种基站的结构示意图;
图 7为本发明实施例提供的另一种基站的结构示意图;
图 8为本发明实施例提供的移动终端的结构示意图。 实施本发明的方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
图 1 为本发明实施例提供的一种获取移动终端移动速度的方法的流程 图。 如图 1所示, 获取移动终端移动速度的方法包括:
步骤 11、 服务基站获取距离估算参数, 所述距离估算参数用于估算移 动终端在所述服务基站小区内移动的距离;
步骤 12、 服务基站根据获取的所述距离估算参数得到所述移动终端在 所述服务基站小区中移动的距离;
步骤 13、 服务基站利用所述移动终端在所述服务基站小区中移动的距 离及所述移动终端在所述服务基站小区内停留时间, 得到所述移动终端在 所述服务基站小区中的移动速度。
移动终端实际在一个小区中移动的路线是不确定的, 如图 2A、 图 2B 所示。图 2A中,移动终端径向穿过一个小区,在该小区中移动的距离较大。 图 2B中, 移动终端切向穿过一个小区, 在该小区中移动的距离较小。
如果图 2A及图 2B中移动终端在图示小区中停留的时间相同,则图 2A 中移动终端的移动速度高于图 2B中移动终端的移动速度。
服务基站可以通过识别出移动终端在服务基站小区中的移动路线, 如 切向穿过或径向穿过服务基站小区, 以此得到移动终端在服务基站小区中 移动的距离。
具体地, 如图 2A中移动终端穿过服务基站小区时, 测量到服务基站的 参考信号接收功率( Reference Signal Receiving Power, RSRP )从很弱到很 强, 再到 4艮弱。 再如图 2B中移动终端切向穿过服务基站小区时, 测量到服 务基站的 RSRP从很弱到较弱, 再到很弱。
而 RSRP很弱时,移动终端位于距离服务基站小区边缘; RSRP较弱时, 移动终端仍位于服务基站小区边缘; RSRP很强时, 移动终端位于服务基站 小区中心。 因此, 图 2A中, 移动终端的移动路线可以认为是从小区边缘到 小区中心再到小区边缘, 图 2B中, 移动终端的移动路线可以认为是一直在 小区边缘移动。 可见, 图 2A中, 移动终端在图示服务基站小区中移动的距 离最长, 图 2B中, 移动终端在图示服务基站小区中移动的距离最短。 当移 动终端以其他路线移动时, 在小区中经过的距离处于二者之间。 由此可以 得出移动终端接收到的最大下行信号接收功率越大, 在小区中移动经过的 巨离越长。
服务基站通过估计信号强度如 UE 测量的基站的下行信号接收功率或 者基站测量 UE的上行信号接收功率的大小 ,来得到移动终端在服务基站小 区中移动的距离也即移动终端在服务基站小区中经过的距离。
用于估算移动终端在服务基站小区中移动的距离的参数, 为便于描述, 称之为距离估算参数。
距离估算参数具体可以为接收功率或者路损。 二者本质是一样的, 因 为路损 =发射功率 -接收功率, 其中发射功率是已知的。 距离估算参数, 可 以是统计一个最小值, 或者最大值, 或者统计平均值, 或者釆样一些典型 值。
计算距离估算参数, 所用到的最基础的信号,可以是 UE测量基站的下 行信号, 或者基站测量 UE的上行信号。 明。
实施例一
本实施例中,距离估算参数为最大下行信号接收功率,移动终端为 UE。 获取移动终端移动速度的方法如图 3所示, 包括: 步骤 31、 服务基站获取 UE通过测量上报的最大下行信号接收功率。 其中下行信号为服务基站向该 UE发送的信号。
如服务基站给 UE的测量配置中, 配置若干个测量报告的触发门限, 当 测量的某个下行信号接收功率大于等于触发门限时, UE上报当前服务基站 的接收功率测量值。 基站根据 UE上报的一个或者若干个接收功率测量值, 取最大的一个, 作为最大下行信号接收功率。
或者, 如服务基站给 UE的测量配置中, 配置一个上报周期, 则 UE会 按照该上报周期周期性地上报当前的下行信号接收功率的测量值。 下行信 号为服务基站发送给 UE的信号。基站根据 UE上报的一个或者若干个下行 信号接收功率的测量值, 取其中最大的一个测量值作为最大下行信号接收 功率。
步骤 32、 根据获取的最大下行信号接收功率得到 UE在服务基站小区 中移动的距离。 具体有如下几种方法:
第一种方法根据如图 4A所示的最大下行信号接收功率和 UE与服务基 站之间的距离的对应变化关系, 得到步骤 31中获取的最大下行信号接收功 率对应的距离。 假设最大下行信号接收功率对应一个相应的距离 D, 如图 4B所示, 服务基站小区的半径是已知的1。 利用勾股定理, 可以得到 X的 距离((Χ/2)Λ2 + DA2 = RA2)„ 而 X可以认为是 UE在服务基站小区中移动的 距离。
第二种方法利用第一种方法中得到 UE在服务基站小区中移动的距离, 形成经验数据, 具体地, 如将一个最大下行信号接收功率及根据该最大下 行信号接收功率得到的 UE在服务基站小区中移动的距离对应保存,得到二 者的对应关系表, 如表 1所示。
Figure imgf000008_0001
30dB 100米
23dB 50米
20dB 20米
17dB 10米 后续只需要根据得到的最大下行信号接收功率查表, 就可以得到 UE 在服务基站小区中移动的距离。
第三种方法利用公式:
UE在服务基站小区中移动的距离 = (最大下行信号接收功率 I基站发 射功率) X小区半径
得到 UE在服务基站小区中移动的距离。其中,基站发射功率及小区半 径是服务基站已知的,最大下行信号接收功率是变量,在步骤 31中已得到。
第四种方法如图 4C所示, 首先获取 UE的角速度, 再根据最大下行信 号接收功率及获取的 UE的角速度,得到 UE在服务基站小区中移动的距离。
其中, 角速度的获取可釆用如下的方法:
如, 服务基站在一段时间内, 获取两个时刻上的来波方向 (Angle Of Arrive, AOA ) 即上行信号的波束方向, 得到 AOA的夹角, 角速度 = 两 个时刻的 AOA的夹角 /两个时刻的时间差。 或者, 也可通过 AOA的夹角及 UE与服务基站之间的距离, 利用数学公式 L=AOA的夹角 X半径(即 UE 与服务基站之间的距离), 直接计算得到两个时刻之间的弧长, 也即 UE的 移动距离。
或者如, 服务基站在一段时间内, 获取两个时刻上的波束(Beam ) 的 夹角, 即两个时刻上的下行信号的波束方向的夹角, 角速度 = 两个时刻的 波束的夹角 / 两个时刻的时间差。 或者, 也可通过波束的夹角及 UE与服 务基站之间的距离, 利用数学公式 L=波束的夹角 X半径 (即 UE与服务基 站之间的距离),直接计算得到两个时刻之间的弧长,也即 UE的移动距离。 UE在服务基站小区中移动的距离可釆用如下公式计算得到:
UE在服务基站小区中移动的距离 =UE 离基站最近的距离 X角速度 X 两个时刻的时间差, 或者,
UE在服务基站小区中移动的距离= ( UE离基站最近的距离 +服务小区 半径) / 2 x角速度 X两个时刻的时间差。
其中, UE离服务基站最近的距离可根据最大下行信号接收功率得到。 第五种方法考虑到 UE在小区中可能呈现曲线运动,利用上述第四种方 法分段计算 UE在服务基站小区中移动的距离,以更精确的估算 UE在服务 基站小区中移动的距离,从而更精确的评估 UE在服务基站小区中的移动速 度。
具体如图 4D所示, 服务基站把 UE在服务基站小区中移动的路径截成 3段: XI、 X2、 X3 , 再利用上述第四种方法对每段的长度进行计算, 然后 得到 UE在服务基站小区中移动的距离 X= Xl+X2+X3。
第六种方法, 基站、 定位服务器、 配置管理实体等网络侧设备收集地 理位置信息和该位置的信号特征信息 (最大下行信号接收功率的信息) 以 及对应的小区标识, 形成射频指紋库, 并进行存储。 形成射频指紋库具体 是釆集小区覆盖范围内各个位置的信号特征: RSRP、 RSRQ等, 以及与各 个位置 (经纬度) 以及各位置对应的小区标识的列表。 由于一个位置有可 能多个小区, 因此可能对应有多个小区标识, 也即一个位置可能对应有小 区标识的列表。
基站获取 UE上报的服务小区内的下行信号接收功率信息以及相应的 小区标识的列表。然后通过查找射频指紋库,即可以得到对应的 UE的位置。 根据 UE两次上报的信息(下行信号接收功率信息和小区标识的列表)得到 两个地理位置, 利用这两个地理位置得到 UE在服务基站小区中移动的距 离。
步骤 33、 服务基站利用 UE两次上报测量报告的时间间隔, 以及上述 步骤 32得到的 UE在服务基站小区中移动的距离, 得到 UE在服务基站小 区中的移动速度。 具体地, 用 UE在服务基站小区中移动的距离除以 UE两 次上报测量报告的时间间隔。
UE两次上报测量报告具体可以是任意的两个时刻, 比如进入小区离开 小区时, 或者服务小区中间位置任意两点, 或者上述步骤 31中服务基站触 发 UE上报测量报告的测量配置。
可选地, 还可进一步包括步骤 34: 服务基站可以把计算出来的 UE的 移动速度, 在 UE切换时, 传递给目标小区。 这样, 目标小区可以参考 UE 之前的速度信息, 用于切换优化或者 UE速度评估。 速度评估是指对 UE之 前的速度和当前的估计的速度进行处理, 比如加权平均或者平滑估计。 切 换优化具体可以是根据源小区指示的 UE的速度,执行准入控制、调度优化 等。 其中, 准入控制可以是如果 UE的移动速度非常快, 而目标小区覆盖范 围很小, 则目标小区可以拒绝接纳 UE; 调度优化可以是如果 UE的移动速 度非常快, 而目标小区对接入的高速 UE 可以使用保守的调制编码速率 ( MCS ), 以克服高速时信道的变化。
实施例二
本实施例与上述实施例一类似, 不同之处在于距离估算参数是基站从 UE侧接收到的最大上行信号接收功率。 具体地, 釆用与上述实施例一第一 种方法类似的方法, 利用最大上行信号接收功率及勾股定理,得到 UE在服 务基站小区中移动的距离, 再用 UE在服务基站小区中移动的距离除以 UE 在服务基站小区中停留的时间,便可以获得 UE在服务基站小区中的移动速 度。
进一步地, 可形成经验数据, 如将一个最大上行信号接收功率及根据 该最大上行信号接收功率得到的 UE在服务基站小区中移动的距离对应保 存,得到二者的对应关系表,从而在后续需要计算 UE在小区中的移动速度 时, 只需得到最大上行信号接收功率, 然后查找经验数据, 便可得到 UE 在小区中的移动距离, 进而除以 UE在小区中停留的时间, 便可以得到 UE 在小区中的移动速度。
实施例三
本实施例与上述实施例一类似, 不同之处在于距离估算参数是平均下 行信号接收功率。
由于平均下行信号接收功率由最大下行信号接收功率计算得到, 因而 可利用平均下行信号接收功率与最大下行信号接收功率的对应关系, 以及 最大下行信号接收功率与 UE到服务基站的距离的对应关系,或者最大下行 信号接收功率与 UE在小区中移动距离的对应关系,得到 UE在小区内的移 动距离,进而除以 UE在小区中停留的时间,得到 UE在小区中的移动速度。
实施例四
本实施例与上述实施例一类似, 不同之处在于距离估算参数是最小下 行路损。
由于最小下行路损等于发射功率减去最大下行信号接收功率, 因此, 可利用最小下行路损与最大下行信号接收功率的对应关系, 以及最大下行 信号接收功率与 UE到服务基站的距离的对应关系,或者最大下行信号接收 功率与 UE在小区中移动距离的对应关系, 得到 UE在小区内的移动距离, 进而除以 UE在小区中停留的时间, 得到 UE在小区中的移动速度。
实施例五
本实施例提供了另一种获取移动终端移动速度的方法, 包括: 与移动终端建立信令连接;
通过与所述移动终端建立的信令连接接收所述移动终端上报的信息获 得所述移动终端的移动速度。
如通过与所述移动终端建立的信令连接接收所述移动终端上报的空闲 态时的移动速度。 或者, 如通过与所述移动终端的信令连接, 接收所述移 动终端发送的重选小区的信息及所述移动终端在所选小区的停留时间; 利 用所述重选小区的信息及所述移动终端在所选小区的停留时间, 得到所述 移动终端的移动速度。
本实施例中, 执行主体为上述移动终端的服务基站。
相对应地, 在移动终端侧, 本实施例还提供了一种用于基站获取移动 终端移动速度的方法, 包括:
与服务基站建立信令连接;
通过与服务基站建立的信令连接向所述服务基站上报信息, 以使所述 服务基站根据所述信息获得移动终端的移动速度。 如通过与服务基站的信 令连接向所述服务基站上报的空闲态时的移动速度。 或者, 如通过与服务 基站的信令连接向所述服务基站发送的重选小区的信息及在所选小区的停 留时间。
图 5 为本发明实施例提供的又一种获取移动终端移动速度的方法的流 程图。 如图 5所示, 流程如下:
步骤 51、 空闲 (Idle ) 态的 UE评估 Idle状态时的速度。
步骤 52、 UE通过与服务小区的信令连接,把 Idle状态时的速度告诉服 务小区。
i. UE把自己 Idle状态的速度评估,通过与基站之间的信令连接发送给 基站。 这样, 基站就能知道当前 UE的速度, 尤其是从 idle态转变为连接态 时, 马上知道 UE的速度, 即把 Idle态的速度作为连接态的速度使用。 即使 UE之前一直处于 Idle状态 (基站没有 UE历史信息,无法通过上面 a计算出 速度), 基站也能在 UE转移成连接状态时知道 UE的速度。 比如 UE Idle态 时, 在 60s 时间内发生了 3次小区重选, 假设按照速度评估得到的是高速, 那么 UE就把" 高速" 在与基站之间的信令连接上发送给基站。
可选地, UE可以把重选小区的信息及在所选小区的停留时间上报给服 务基站, 这样, 服务基站可以利用小区重选的次数及重选所用的时间得到 UE 的移动速度。 其中, 重选小区的信息可以是小区标识(ID )、 小区类型 等。 小区类型可为如小区大小等。 如 UE可以把小区的类型信息(如宏小区 /Pico小区 /Femto小区 /、 小区发射功率信息、 大小区 /小小区 /小小小区, 这 个类型信息具体可以从小区的广播信息中获取, 即基站侧需要广播这些信 息)、 小区的标识、 及在每个小区停留的时间中的至少一个信息上 ^艮给服务 基站, 服务基站可以利用这些信息得到 UE在空闲态时的移动速度。
进一步可选地,基站在获取到 UE上报的发生小区重选的次数及重选所 用的时间等上述信息后, 在后续发起切换时, 把这些信息传递给相邻基站。 具体地,服务基站可以将上述信息加入到 UE历史信息列表中。这样相邻基 站就可以知道 UE之前处于 Idle状态时的信息,如在每个小区停留时间、小 区的标识、 小区的类型、 多长时间发生了多少重选等, 以此, 相邻基站可 以根据上述信息更精确地获知 UE的当前移动速度。如相邻基站根据小区尺 寸信息和连接持续时间,估计出 UE的历史移动速度。具体地可以使用小区 尺寸信息估算出小区半径,除以连接持续时间,就能估计出 UE的移动速度。 如对一个大尺寸的小区, 可以折算成 600米, 如果停留时间是 60秒, 那么 UE的移动速度是 600米 /60秒 = 10米 /秒 =36公里 /小时。
步骤 53、 服务小区获知 UE 的速度后, 进行无线资源管理 (Radio Resource Management, RRM )。 具体如 UE速度评估、 接入控制优化、 调度 优化, 详见上述实施例一中的说明。
与实施例一类似可选地, 本实施例的流程可进一步包括步骤 54: 服务 基站将获取的 UE的移动速度在 UE切换时传递给目标小区,详见上述实施 例一中的说明。
实施例六
本实施例中, 服务基站从 UE切换前的源小区基站获取。 具体地, 如实 施例一、实施例五中服务基站将获取的 UE的移动速度发送给 UE切换的目 标小区基站, 可以将本实施例中的服务基站看作实施例一、 五中的目标小 区基站, 相应地源小区基站可以看作实施例一、 五中的服务基站。 其中, 源小区获取 UE的移动速度不限于上述实施例一〜实施例五中的 方法, 也可以是其它方法, 只要能得到 UE的移动速度即可。
与上述实施例一、 实施例五类似可选地,服务基站根据 UE切换之前的 移动速度即从源小区基站获得的 UE的移动速度,进行切换优化或者速度评 估。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机 可读取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序 代码的介质。
图 6为本发明实施例提供的一种基站的结构示意图。 本实施例提供的 基站用于实现图 1所示实施例的方法, 可为 UE的服务基站, 如图 6所示, 包括: 参数获取单元 61、 距离获取单元 62及速度获取单元 63。 本领域技 术人员应理解, 本实施例提供的基站还应该包括射频处理等基站的基本功 能单元, 由于不是本发明的重点, 这里不再赘述。
参数获取单元 61用于获取距离估算参数, 上述距离估算参数用于估算 移动终端在服务基站小区内移动的距离。 距离获取单元 62用于根据获取的 上述距离估算参数得到上述移动终端在上述服务基站小区中移动的距离。 速度获取单元 63用于利用上述移动终端在上述服务基站小区中移动的距离 及上述移动终端在上述服务基站小区内停留时间, 得到上述移动终端在上 述服务基站小区中的移动速度。 其中, 所述距离估算参数可为最大上行信 号接收功率、 平均上行信号接收功率、 最大下行信号接收功率、 平均下行 信号接收功率、 最小下行路损、 平均下行路损、 最小上行路损或平均上行 路损等, 详见上述方法实施例中的说明。
上述参数获取单元 61具体用于接收移动终端通过测量上报的最大下行 信号接收功率。 本发明实施例提供的基站还可包括: 配置单元, 用于在上述参数获取 单元接收移动终端通过测量上报的最大下行信号接收功率之前, 为上述移 动终端的测量配置测量报告触发门限或上报周期。 相应地, 上述参数获取 单元可包括: 下行功率接收子单元及最大功率选取子单元。
下行功率接收子单元用于接收上述移动终端测量到下行信号接收功率 满足上述触发门限时上报的下行信号接收功率, 或者, 接收上述移动终端 按照上述上报周期周期性上报的下行信号接收功率。
最大功率选取子单元用于从接收的下行信号接收功率中选取最大的下 行信号接收功率作为最大下行信号接收功率。
上述距离获取单元可包括: 当前距离获取子单元及第一移动距离获取 子单元。
当前距离获取子单元用于根据上述最大下行信号接收功率及上述移动 终端与上述服务基站之间的距离的对应关系, 得到上述移动终端与上述服 务基站之间的当前距离。
第一移动距离获取子单元用于利用上述当前距离及勾股定律得到上述 移动终端在上述服务基站小区中移动的距离。
本发明实施例提供的基站还可包括: 关系保存单元, 用于在上述距离 获取单元根据获取的上述距离估算参数得到上述移动终端在上述服务基站 小区中移动的距离的过程之后, 将上述最大下行信号接收功率与得到的上 述移动终端在上述服务基站小区中移动的距离对应保存。 如上述方法实施 例中的说明, 可通过保存最大下行信号接收功率与得到的上述移动终端在 上述服务基站小区中移动的距离的对应关系, 得到经验值, 用于后续的速 度运算。
所述距离获取单元可具体用于根据保存的最大下行信号接收功率与移 动终端在所述服务基站小区中移动的距离的对应关系, 查找到所述移动终 端在所述服务基站小区中移动的距离。 或者, 所述距离获取单元可具体用于将所述最大下行信号接收功率除 以所述服务基站的信号发射功率, 再乘以所述服务基站小区的小区半径, 得到所述移动终端在所述服务基站小区中移动的距离。
或者, 所述距离获取单元可包括: 角速度获取子单元及第二移动距离 获取子单元。
角速度获取子单元用于根据所述最大下行信号接收功率得到所述移动 终端的角速度; 第二移动距离获取子单元用于利用所述角速度得到所述移 动终端在所述服务基站小区中移动的距离。
或者, 所述距离获取单元可包括: 位置获取子单元及第三移动距离获 取子单元。
位置获取子单元用于在接收所述移动终端上报的下行信号接收功率的 同时获取所述移动终端的对应地理位置信息; 第三移动距离获取子单元用 于利用所述地理位置信息得到所述移动终端在所述服务基站小区中移动的 距离。
本发明实施例提供的基站还可包括: 发送单元, 用于将所述移动终端 的移动速度发送到目标小区的基站。
图 7 为本发明实施例提供的另一种基站的结构示意图。 本实施例提供 的基站用于实现上述实施例五所示的方法, 如图 7 所示, 包括: 连接单元
71、 信息接收单元 72及移动速度获取单元 73。 本领域技术人员应理解, 本 实施例提供的基站还应该包括射频处理等基站的基本功能单元, 由于不是 本发明的重点, 这里不再赘述。
连接单元 71用于与移动终端建立信令连接; 信息接收单元 72用于通 过与移动终端建立的信令连接接收所述移动终端上报的信息。 移动速度获 取单元 73 用于通过所述移动终端上报的信息获得所述移动终端的移动速 度。
如所述信息接收单元 72具体用于通过与移动终端的信令连接接收所述 移动终端上报的空闲态时的移动速度。 或者如所述信息接收单元 72可具体 用于接收所述移动终端发送的小区重选次数及重选所用时间; 相应地, 所 述移动速度获取单元 73可具体用于利用所述小区重选次数及重选所用时间 得到所述移动终端的移动速度。
可选地, 本发明实施例提供的基站还可包括: 发送单元, 用于将所述 移动终端上报的信息发送给相邻基站。
可选地, 本发明实施例提供的基站还可包括: 管理单元, 用于根据获 得的移动速度进行无线资源管理。
图 8为本发明实施例提供的移动终端的结构示意图。 本实施例提供的 移动终端用于实现上述实施例五所示的用于使基站获取移动终端移动速度 的方法, 如图 7所示, 包括连接单元 81及上报单元 82, 连接单元 81用于 与服务基站建立信令连接; 上报单元 82用于通过与服务基站建立的信令连 接向所述服务基站上报信息, 以使所述服务基站根据所述信息获得移动终 端的移动速度。 如上报单元 82可具体用于通过与服务基站的信令连接向所 述服务基站上报的空闲态时的移动速度, 或者可具体用于通过与服务基站 的信令连接向所述服务基站发送的重选小区的信息及在所选小区的停留时 间。 本领域技术人员应理解, 本实施例提供的移动终端还应该包括信号接 收、 射频处理等移动终端所具有的基本功能单元, 由于不是本发明的重点, 这里不再赘述。
或者, 本发明实施例提供的基站包括: 接收单元, 用于接收源小区基 站发送的移动终端在所述源小区中的移动速度。 本领域技术人员应理解, 本实施例提供的基站还应该包括射频处理等基站的基本功能单元, 由于不 是本发明的重点, 这里不再赘述。
可选地, 本发明实施例提供的基站还可包括: 速度评估单元, 用于根 据接收的所述移动终端在所述源小区中的移动速度, 对所述移动终端的速 度进行评估。 最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种获取移动终端移动速度的方法, 其特征在于, 包括:
服务基站获取距离估算参数, 所述距离估算参数用于估算移动终端在 所述服务基站小区内移动的距离;
服务基站根据获取的所述距离估算参数得到所述移动终端在所述服务 基站小区中移动的距离;
服务基站利用所述移动终端在所述服务基站小区中移动的距离及所述 移动终端在所述服务基站小区内停留时间, 得到所述移动终端在所述服务 基站小区中的移动速度。
2、根据权利要求 1所述的获取移动终端移动速度的方法,其特征在于, 服务基站获取距离估算参数的过程, 包括:
所述服务基站接收移动终端通过测量上报的最大下行信号接收功率。
3、根据权利要求 2所述的获取移动终端移动速度的方法,其特征在于, 所述服务基站接收移动终端通过测量上报的最大下行信号接收功率之前, 包括: 所述服务基站为所述移动终端的测量配置测量报告触发门限或上报 周期;
所述服务基站接收移动终端通过测量上报的最大下行信号接收功率的 过程, 包括:
所述服务基站接收所述移动终端测量到下行信号接收功率满足所述触 发门限时上报的下行信号接收功率, 或者, 所述服务基站接收所述移动终 端按照所述上报周期周期性上报的下行信号接收功率;
所述服务基站从接收的下行信号接收功率中选取最大的下行信号接收 功率作为最大下行信号接收功率。
4、根据权利要求 2所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程, 包括: 根据所述最大下行信号接收功率及所述移动终端与所述服务基站之间 的距离的对应关系, 得到所述移动终端与所述服务基站之间的当前距离; 利用所述当前距离及勾股定律得到所述移动终端在所述服务基站小区 中移动的距离。
5、根据权利要求 4所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程之后, 还包括:
将所述最大下行信号接收功率与得到的所述移动终端在所述服务基站 小区中移动的距离对应保存。
6、根据权利要求 2所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程, 包括:
根据保存的最大下行信号接收功率与移动终端在所述服务基站小区中 移动的距离的对应关系, 查找到所述移动终端在所述服务基站小区中移动 的距离。
7、根据权利要求 2所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程, 包括:
将所述最大下行信号接收功率除以所述服务基站的信号发射功率, 再 乘以所述服务基站小区的小区半径, 得到所述移动终端在所述服务基站小 区中移动的距离。
8、根据权利要求 2所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程, 包括:
根据所述最大下行信号接收功率得到所述移动终端的角速度; 利用所述角速度得到所述移动终端在所述服务基站小区中移动的距 离。
9、根据权利要求 1所述的获取移动终端移动速度的方法,其特征在于, 根据获取的所述距离估算参数得到所述移动终端在所述服务基站小区中移 动的距离的过程, 包括:
所述服务基站在接收所述移动终端上报的下行信号接收功率的同时获 取所述移动终端的对应地理位置信息;
利用所述地理位置信息得到所述移动终端在所述服务基站小区中移动 的距离。
10、根据权利要求 1-9任一项所述的获取移动终端移动速度的方法,其 特征在于, 所述距离估算参数为最大上行信号接收功率、 平均上行信号接 收功率、 最大下行信号接收功率、 平均下行信号接收功率、 最小下行路损、 平均下行路损、 最小上行路损或平均上行路损。
11、根据权利要求 1-9任一项所述的获取移动终端移动速度的方法,其 特征在于, 还包括:
所述服务基站将所述移动终端的移动速度发送到目标小区的基站。
12、 一种获取移动终端移动速度的方法, 其特征在于, 包括: 与移动终端建立信令连接;
通过与所述移动终端建立的信令连接接收所述移动终端上报的信息获 得所述移动终端的移动速度。
13、 根据权利要求 12所述的获取移动终端移动速度的方法, 其特征在 于, 通过与所述移动终端的信令连接接收所述移动终端上报的信息获得所 述移动终端的移动速度的过程, 包括:
通过与所述移动终端建立的信令连接接收所述移动终端上报的空闲态 时的移动速度。
14、 根据权利要求 12所述的获取移动终端移动速度的方法, 其特征在 于, 通过与所述移动终端的信令连接接收所述移动终端上报的信息获得所 述移动终端的移动速度的过程, 包括:
通过与所述移动终端的信令连接, 接收所述移动终端发送的重选小区 的信息及所述移动终端在所选小区的停留时间;
利用所述重选小区的信息及所述移动终端在所选小区的停留时间, 得 到所述移动终端的移动速度。
15、 根据权利要求 13或 14所述的获取移动终端移动速度的方法, 其 特征在于, 还包括:
将所述移动终端上报的信息发送给相邻基站。
16、 根据权利要求 12-15任一项所述的获取移动终端移动速度的方法, 其特征在于, 还包括:
根据获得的移动速度进行无线资源管理。
17、 一种获取移动终端移动速度的方法, 其特征在于, 包括: 接收源小区基站发送的移动终端在所述源小区中的移动速度。
18、 根据权利要求 17所述的获取移动终端移动速度的方法, 其特征在 于, 还包括:
根据接收的所述移动终端在所述源小区中的移动速度, 对所述移动终 端的速度进行评估。
19、 一种用于基站获取移动终端移动速度的方法, 其特征在于, 包括: 与服务基站建立信令连接;
通过与服务基站建立的信令连接向所述服务基站上报信息, 以使所述 服务基站根据所述信息获得移动终端的移动速度。
20、 根据权利要求 19所述的用于基站获取移动终端移动速度的方法, 其特征在于, 通过与服务基站的信令连接向所述服务基站上报信息, 包括: 通过与服务基站的信令连接向所述服务基站上报的空闲态时的移动速 度。
21、 根据权利要求 19所述的用于基站获取移动终端移动速度的方法, 其特征在于, 通过与服务基站的信令连接向所述服务基站上报信息, 包括: 通过与服务基站的信令连接向所述服务基站发送的重选小区的信息及 在所选小区的停留时间。
22、 一种基站, 其特征在于, 包括:
参数获取单元, 用于获取距离估算参数, 所述距离估算参数用于估算 移动终端在服务基站小区内移动的距离;
距离获取单元, 用于根据获取的所述距离估算参数得到所述移动终端 在所述服务基站小区中移动的距离;
速度获取单元, 用于利用所述移动终端在所述服务基站小区中移动的 距离及所述移动终端在所述服务基站小区内停留时间, 得到所述移动终端 在所述服务基站小区中的移动速度。
23、 根据权利要求 22所述的基站, 其特征在于, 所述参数获取单元具 体用于接收移动终端通过测量上报的最大下行信号接收功率。
24、 根据权利要求 23所述的基站, 其特征在于, 还包括:
配置单元, 用于在所述参数获取单元接收移动终端通过测量上报的最 大下行信号接收功率之前, 为所述移动终端的测量配置测量报告触发门限 或上报周期;
所述参数获取单元, 包括:
下行功率接收子单元, 用于接收所述移动终端测量到下行信号接收功 率满足所述触发门限时上报的下行信号接收功率, 或者, 接收所述移动终 端按照所述上报周期周期性上报的下行信号接收功率;
最大功率选取子单元, 用于从接收的下行信号接收功率中选取最大的 下行信号接收功率作为最大下行信号接收功率。
25、 根据权利要求 23所述的基站, 其特征在于, 所述距离获取单元包 括:
当前距离获取子单元, 用于根据所述最大下行信号接收功率及所述移 动终端与所述服务基站之间的距离的对应关系, 得到所述移动终端与所述 服务基站之间的当前距离;
第一移动距离获取子单元, 用于利用所述当前距离及勾股定律得到所 述移动终端在所述服务基站小区中移动的距离。
26、 根据权利要求 25所述的基站, 其特征在于, 还包括:
关系保存单元, 用于在所述距离获取单元根据获取的所述距离估算参 数得到所述移动终端在所述服务基站小区中移动的距离的过程之后, 将所 述最大下行信号接收功率与得到的所述移动终端在所述服务基站小区中移 动的距离对应保存。
27、 根据权利要求 23所述的基站, 其特征在于, 所述距离获取单元具 体用于根据保存的最大下行信号接收功率与移动终端在所述服务基站小区 中移动的距离的对应关系, 查找到所述移动终端在所述服务基站小区中移 动的 巨离。
28、 根据权利要求 23所述的基站, 其特征在于, 所述距离获取单元具 体用于将所述最大下行信号接收功率除以所述服务基站的信号发射功率, 再乘以所述服务基站小区的小区半径, 得到所述移动终端在所述服务基站 小区中移动的距离。
29、 根据权利要求 23所述的获取移动终端移动速度的方法, 其特征在 于, 所述距离获取单元包括:
角速度获取子单元, 用于根据所述最大下行信号接收功率得到所述移 动终端的角速度;
第二移动距离获取子单元, 用于利用所述角速度得到所述移动终端在 所述服务基站小区中移动的距离。
30、 根据权利要求 22所述的基站, 其特征在于, 所述距离获取单元包 括:
位置获取子单元, 用于在接收所述移动终端上报的下行信号接收功率 的同时获取所述移动终端的对应地理位置信息;
第三移动距离获取子单元, 用于利用所述地理位置信息得到所述移动 终端在所述服务基站小区中移动的距离。
31、根据权利要求 22-30任一项所述的基站, 其特征在于, 所述距离估 算参数为最大上行信号接收功率、 平均上行信号接收功率、 最大下行信号 接收功率、 平均下行信号接收功率、 最小下行路损、 平均下行路损、 最小 上行路损或平均上行路损。
32、 根据权利要求 22-30任一项所述的基站, 其特征在于, 还包括: 发送单元, 用于将所述移动终端的移动速度发送到目标小区的基站。
33、 一种基站, 其特征在于, 包括:
连接单元, 用于与移动终端建立信令连接;
信息接收单元, 用于通过与所述移动终端建立的信令连接接收所述移 动终端上 >¾的信息;
移动速度获取单元, 用于通过所述移动终端上报的信息获得所述移动 终端的移动速度。
34、 根据权利要求 33所述的基站, 其特征在于, 所述信息接收单元具 体用于通过与移动终端的信令连接接收所述移动终端上报的空闲态时的移 动速度。
35、 根据权利要求 33所述的基站, 其特征在于, 所述信息接收单元具 体用于接收所述移动终端发送的小区重选次数及重选所用时间;
所述移动速度获取单元具体用于利用所述小区重选次数及重选所用时 间得到所述移动终端的移动速度。
36、 根据权利要求 34或 35所述的基站, 其特征在于, 还包括: 发送单元, 用于将所述移动终端上报的信息发送给相邻基站。
37、 根据权利要求 33-36任一项所述的基站, 其特征在于, 还包括: 管理单元, 用于根据获得的移动速度进行无线资源管理。
38—种移动终端, 其特征在于, 包括:
连接单元, 用于与服务基站建立信令连接;
上报单元, 用于通过与服务基站建立的信令连接向所述服务基站上报 信息, 以使所述服务基站根据所述信息获得移动终端的移动速度。
39、 根据权利要求 38所述的移动终端, 其特征在于, 所述上报单元具 体用于通过与服务基站的信令连接向所述服务基站上报的空闲态时的移动 速度, 或者具体用于通过与服务基站的信令连接向所述服务基站发送的重 选小区的信息及在所选小区的停留时间。
40、 一种基站, 其特征在于, 包括:
接收单元, 用于接收源小区基站发送的移动终端在所述源小区中的移 动速度。
41、 根据权利要求 40所述的基站, 其特征在于, 还包括:
速度评估单元, 用于根据接收的所述移动终端在所述源小区中的移动速度, 对所述移动终端的速度进行评估。
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