WO2013044489A1 - 一种估计终端移动状态的方法和装置 - Google Patents

一种估计终端移动状态的方法和装置 Download PDF

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Publication number
WO2013044489A1
WO2013044489A1 PCT/CN2011/080389 CN2011080389W WO2013044489A1 WO 2013044489 A1 WO2013044489 A1 WO 2013044489A1 CN 2011080389 W CN2011080389 W CN 2011080389W WO 2013044489 A1 WO2013044489 A1 WO 2013044489A1
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WO
WIPO (PCT)
Prior art keywords
group
terminal
cell
handover
counting
Prior art date
Application number
PCT/CN2011/080389
Other languages
English (en)
French (fr)
Inventor
鲁艳玲
汪巍崴
徐海博
常宁娟
Original Assignee
富士通株式会社
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 富士通株式会社 filed Critical 富士通株式会社
Priority to EP11873261.9A priority Critical patent/EP2763459A4/en
Priority to KR1020147009293A priority patent/KR20140059852A/ko
Priority to PCT/CN2011/080389 priority patent/WO2013044489A1/zh
Priority to CN201180073019.3A priority patent/CN103765949A/zh
Priority to JP2014532209A priority patent/JP2014532337A/ja
Publication of WO2013044489A1 publication Critical patent/WO2013044489A1/zh
Priority to US14/226,307 priority patent/US20140206357A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • 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
    • 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
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data

Definitions

  • the present invention relates to communication systems, and more particularly to a method and apparatus for estimating a mobile state of a terminal in a mobile communication system. Background technique
  • the terminal in order to ensure the mobility of the terminal, the terminal needs to perform switching in the connected mode or perform cell reselection in the idle mode.
  • connection mode in order to ensure the correct triggering of the handover, the terminal needs to pass RRM (Radio Resource
  • the terminal will Report the measurement results to the base station.
  • TTT Time to Trigger
  • the base station can decide whether to initiate the handover process according to the measurement result. As shown in Figure 1, if the trigger event is defined as "the signal quality of the current serving cell is below a certain threshold", the terminal will report the measurement result to the base station only if the measured value is below this threshold for the triggering time.
  • both the trigger time and the trigger condition of the event can affect the success rate of the handover.
  • the trigger event is "the signal quality of the current serving cell is below a certain threshold”
  • this trigger event can be used as a condition for triggering the handover.
  • the serving cell needs additional time from receiving the measurement report to triggering the handover and switching execution.
  • the threshold is too low, it may happen that although the terminal has reported the measurement result, the signal quality of the current serving cell deteriorates rapidly. It is no longer possible to perform subsequent trigger switching and other actions, and then the terminal is dropped.
  • the threshold is too high, it may happen that the signal quality of the current serving cell is sufficient to maintain communication with the terminal, but the signal quality of the target cell is not good enough.
  • the call drop problem of the terminal may also occur.
  • the trigger time can also affect the effect of the switch.
  • the quality of the serving cell will be additionally deteriorated.
  • the quality of service of the serving cell is insufficient to support subsequent switching operations, thereby causing the terminal to drop.
  • the triggering time is too short, the quality of the serving cell may only be a short-term fluctuation, and the signal quality is likely to recover quickly.
  • the terminal cuts away from the current serving cell and the quality of the target cell is not good enough. At this time, the terminal is Easy to drop words.
  • the setting of the trigger time is related to many conditions, such as: the static change of the channel and the speed of the terminal.
  • the static change of the channel refers to the channel change between the terminal and the base station when the terminal is stationary: If the channel fluctuation range is large, then in general, the trigger time needs to be set longer to smooth the excessive fluctuation of the channel; conversely, if the channel fluctuation range is small and stable, the trigger time can be set shorter.
  • the faster the terminal speed the shorter the triggering time is to prevent the channel from changing rapidly with the user's position change. Conversely, if the terminal speed is slow, the trigger time needs to be set longer.
  • the trigger time is generally set according to the situation in the general sense. If the correction is to be performed, the terminal estimates its own mobile state and finds the corresponding correction factor. Multiply the original trigger time by this correction factor. In general, the correction factor is generally less than 1, and the faster the speed, the smaller the correction factor.
  • the terminal when the terminal performs cell reselection, the terminal also needs to measure the neighboring base station to determine whether to reselect the neighboring cell.
  • the terminal can reselect to the neighboring cell only if the measurement result of the neighboring cell is better than the current serving cell during the entire reselection time.
  • the reselection time of the reselection is similar to the trigger time in the handover, and the reselection time needs to be corrected according to the movement state of the terminal.
  • the measurement evaluation of the serving cell also needs to be corrected by the correction reference related to its moving state: the faster the speed, the correction factor makes the evaluation of the current serving cell more unfavorable, and tends to reselect to the phase. Neighboring cell; The slower the speed, the correction factor makes the evaluation of the current serving cell more favorable, and tends to continue to receive services in the current cell.
  • the inventor has found that the estimation scheme of the mobile terminal state of the existing system does not consider the size of the cell on the mobile path, or the repeated counting occurs during the terminal movement, or occurs during the terminal movement. The missing count leads to an inaccurate estimation of the terminal's mobile state.
  • An object of the embodiments of the present invention is to provide a method and apparatus for estimating a mobile terminal state that is relatively simple, has a small signaling load, and is more accurate in moving state estimation.
  • a method for estimating a mobile state of a terminal includes:
  • the terminal determines, according to the received network topology information, whether handover or cell reselection occurs between groups or groups; if handover or cell reselection occurs between groups, the terminal counts the handover or cell reselection according to the inter-group size. ;
  • the terminal counts the handover or cell reselection according to the intra-group mobility count result
  • the terminal estimates the mobile state of the terminal according to the counting result.
  • a terminal includes: a receiving unit, which receives network topology information delivered by a network side;
  • a determining unit which determines, according to the received network topology information, whether the handover or the cell reselection occurs between groups or groups;
  • a counting unit when the determining unit determines that handover or cell reselection occurs between groups, counting the handover or cell reselection according to an inter-group size; determining, in the determining unit, that handover or cell reselection occurs in a group Internally, counting the handover or cell reselection according to the result of the intra-group mobile counting;
  • An estimating unit that estimates a moving state of the terminal based on a counting result of the counting unit.
  • a method for estimating a mobile state of a terminal includes:
  • the base station provides the network topology information to the terminal by means of broadcast or unicast, so that the terminal determines, according to the network topology information, whether the handover or the cell reselection occurs between groups or groups, and reselects the handover or the cell according to the determination result.
  • Counting is performed, and then the moving state of the terminal is estimated based on the counting result.
  • a base station includes: a sending unit, which provides network topology information to a terminal by using a broadcast or unicast mode, so that the terminal determines, according to the network topology information, Whether the handover or the cell reselection occurs between groups or groups, and the handover or cell reselection is counted according to the determination result, and then the mobile state of the terminal is estimated according to the counting result.
  • a computer readable program is provided, wherein when executed in a terminal When the program is executed, the program causes the computer to execute the aforementioned method of estimating the terminal movement state of the terminal applied to the terminal in the terminal.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the aforementioned method of estimating a terminal movement state applied to a terminal in a terminal.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform the foregoing method of estimating a terminal mobile state applied to a base station in the base station .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the aforementioned method of estimating a terminal movement state of a base station applied to a base station in a base station.
  • the beneficial effects of the embodiments of the present invention are as follows:
  • the embodiment of the present invention proposes a new method for estimating the mobile state of a terminal in a mobile communication system.
  • the base station sends the deployment information of the network to the terminal, such as the identifier of the high-level cell.
  • the terminal can determine whether the handover or cell reselection occurs within the group or between the groups. If it occurs inside the group, the terminal considers the result of the count within the group when counting; if it occurs between the groups, the terminal also considers the size between the groups when counting. In this way, the accuracy of the estimation is improved with less signaling cost, and the prediction result is more accurate, the applicable scenario is more extensive, and the air interface signaling is simple.
  • FIG. 1 is a schematic diagram of a triggering time of a measurement report in the prior art
  • FIG. 2 is a flowchart of a method for estimating a mobile terminal state according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a terminal switching between cells
  • FIG. 4 is a schematic diagram of a situation in which the movement path of the terminal is different, resulting in an inaccurate estimation of the movement state;
  • FIG. 5 is a schematic diagram of counting the movement of the terminal by using the improved method 1;
  • FIG. 6 is a schematic diagram of a scenario for counting terminal movements using the improved method 2;
  • Figure 7 is a schematic diagram of another scenario for counting terminal movements using the improved method 2;
  • FIG. 8 is a flowchart of a method for estimating a mobile terminal state of a base station according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a terminal structure according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
  • the macro cell and the smaller cell within its coverage are referred to as a “group”, and for the independent macro cell (ie, There is no smaller cell within the coverage area or a separate smaller cell (ie no macro cell coverage itself) is also referred to as a "group”.
  • the macro cell may be, for example, a cell covered by an eNB (evolved Node B), and the smaller cell may be, for example, an RRH (Remote Radio Head), a Pico (Pico base station), and a Relay (Relay).
  • RRH Remote Radio Head
  • Pico Pico
  • Relay Relay
  • a cell covered by HeNB Home eNB, Home Base Station).
  • An embodiment of the present invention provides a method for estimating a mobile state of a terminal, as described in Embodiment 1 below.
  • Example 1
  • FIG. 2 is a flowchart of a method for estimating a mobile terminal state according to an embodiment of the present invention. Referring to FIG. 2, the method includes:
  • Step 201 The terminal determines, according to the received network topology information, that handover or cell reselection occurs between groups. Is within the group;
  • Step 202 If handover or cell reselection occurs between groups, the terminal counts the handover or cell reselection according to the inter-group size. If the handover or cell reselection occurs in the group, the terminal performs the intra-group movement counting result. Counting the handover or cell reselection;
  • Step 203 The terminal estimates the mobile state of the terminal according to the counting result.
  • the base station sends network topology information to the terminal, and the top-level cell of the current cell is indicated by the network topology information, that is, the coverage Your own community. If no other cell covers itself, the top cell of the current cell is considered to be itself.
  • the base station may send the network topology information to the terminal by means of unicast or broadcast.
  • the network topology information may further include an identifier of the top-level cell. The processing on the specific base station side will be described in the following embodiments.
  • the terminal can determine whether the handover or cell reassembly occurs between groups or within the group.
  • the terminal switches from cell 1 to cell 2. If the top-level cells reported by cell 1 and cell 2 are all themselves, the terminal can determine that the handover occurs between groups, as shown in FIG. 3 (a); The top-level cell is itself, and the top-level cell reported by cell 2 is cell 1, the terminal can determine that the handover occurs in the group, as shown in Figure 3 (b); if the top-level cell reported by cell 1 is cell 2, cell 2 reports The top-level cell is itself, and the terminal can determine that the handover occurs within the group, as shown in Figure 3 (c).
  • the inter-group size may be the maximum value of the intra-group macro cell and the intra-group counting result in the current group when the terminal moves out of the current group, or may be the size of the macro cell in the group and the terminal moves out. The sum of the count results in the current group at the current group.
  • the inter-group size is the result of the intra-group counting in the current group when the terminal moves out of the current group; when there is no smaller cell in the group, the inter-group size is the size of the intra-group macro cell.
  • the terminal moves out of the N-1th group in the path of its movement (here, "moving out the N-1th group” means that the terminal switches from the N-1th group to the Nth group or from the N-1th group.
  • the intra-group mobile counting result may be a counting result of the smaller cell that the terminal switches or the cell reselects when moving within the group, or may be the terminal switching or cell reselection when moving within the group.
  • the intra-group mobile counting result is the counting result of the handover or cell reselection of the smaller cell when the terminal moves within the group.
  • the terminal moves out of the N-1th group in the path of its movement (here, "moving out the N-1th group” means that the terminal switches from the N-1th group to the Nth group, or from the N-1th.
  • g(N, m) is the intra-group count result of the terminal moving out of the mth smaller cell in the Nth group.
  • g(N, m) is the result of counting only the smaller cells that are switched or reselected when the terminal moves within the group, when there are no smaller cells in the group (ie, the group is an independent macro cell)
  • FIG. 4 is a schematic diagram showing a situation in which the movement path of the terminal is different, resulting in an inaccurate estimation of the movement state by using the existing method.
  • the base station uses the existing counting method, including: the base station transmits the trigger to the terminal by broadcasting (when the terminal is in the idle mode) or unicast (when the terminal is in the connected mode).
  • Parameters required for time Counting time period, corrected counting time period, high threshold, medium threshold.
  • the terminal counts the number of handovers or cell reselections within the specified counting period.
  • the terminal When the counting time is over, if the counting result is greater than the high threshold, the terminal judges that it is in the high speed moving state; if the counting result is not higher than the high threshold but higher than the middle threshold, the terminal judges that it is in the medium speed moving state; if the counting is in the correction In the time period, neither the high-speed moving state nor the medium-speed moving state is detected, and the terminal judges that it is in the normal state. Pass the mobile state. After determining the mobile state of the terminal, since the terminal has obtained the correction factor for different processes (handover or cell reselection) in different mobile states in advance, the terminal may select a correction factor corresponding to the actually determined mobile state. Correct the corresponding process.
  • the terminal does not consider the size of the cell when counting handover or cell reselection.
  • the terminals move through path 1 and path 2 at the same actual speed.
  • the number of handovers is significantly smaller than the number of handovers when moving through the path 2.
  • the terminal may get different moving states when the two paths move.
  • the size of each cell may be relatively large, and the topology of the network may be complicated. If the cell size is not considered when judging the mobile state of the terminal, this problem will occur.
  • Figure 5 is an example of an improved method 1.
  • the base station broadcasts the weighted size of the cell, and the terminal corrects the determination process of the mobile state according to the received weighted size.
  • the weighting size of the macro cell is 1, and the weighting size of the micro cell is 0.3.
  • the terminal accumulates 1 from the macro cell handover or the cell reselection, and the terminal accumulates 0.3 when switching from the micro cell or the cell reselection.
  • the counting result of the terminal includes the size factor of the cell, but brings about the problem of repeated counting, so that the estimated result is faster than the actual moving speed.
  • the cells 1-3 are a group, wherein the top-level cell of the cell 2 and the cell 3 is the cell 1, and the top-level cell of the cell 1 is itself, visible, and the terminal moves out at the leftmost side in the figure.
  • the count value R(Nl) before entering the group 1 is entered into the group, and the first value of G(N) is adopted.
  • Figures 6 and 7 show two examples of the improved method 2. As shown in FIG. 6 and FIG. 7, the method only counts macro cells in the network, and does not count other small cells (such as micro cells, relay base stations, etc.). In this way, the cell size to be counted is uniform, and the result of the motion prediction is relatively accurate. In order for the terminal to recognize the macro cell, there are two ways:
  • the physical identifier fields of the base station are divided into two sets, the physical identifiers of the macro cells are selected in one of the independent sets, and the physical identifiers of the other cells are selected in another set. Since the physical identifier is information obtained by the terminal for normal communication and even if the mobile state is not estimated, the terminal can naturally obtain the information of "whether the current cell is a macro cell" by dividing the physical identifier field.
  • the base station broadcasts a new message to indicate whether it needs to be counted by the terminal.
  • the base station can broadcast
  • the terminal can know whether a certain base station needs to be counted. However, this method can cause problems with missing counts.
  • a number of independent smaller cells (cells 2 and 3) are on the mobile path of the terminal. If indication mode 1 is used, cells 2 and 3 will not be counted.
  • several smaller cells (cells 2-5) are within the coverage of macrocell 1. When some terminals move within the coverage of cell 1 during the entire counting period or within the time when the counting segment is about to end, regardless of mode 1 or mode 2, switching out of cells 2 ⁇ 5 will not be counted, so There will be problems with missing counts. If a missing count is generated, it will cause the estimated moving state to be lower than the actual speed.
  • each cell is a group, and it can be seen that the mobile process of the terminal belongs to inter-group mobility.
  • each group has only one macro cell, for the cell. 2, 3, each group has only one smaller cell, according to the inter-group counting mode according to the embodiment of the present invention, the counting result of the mobile terminal is: the size of two macro cells (cell 1 and cell 4) and two The sum of the in-group count results of the smaller cells (Cell 2 and Cell 3).
  • cells 1-5 are a group. It can be seen that the mobile process of the terminal in cell 1 belongs to intra-group mobility. It is assumed that the group in which the cells 1 to 5 are located is the Nth group that the terminal enters during the counting process, and the cells 2 to 4 are the first to third smaller cells that the terminal moves out in the Nth group, according to an embodiment of the present invention.
  • the embodiment of the invention proposes a new method for estimating the mobile state of a terminal in a mobile communication system.
  • the base station sends the deployment information of the network to the terminal, such as the identifier of the high-level cell. Based on the received information, the terminal can determine whether the handover or cell reselection occurs within the group or between the groups. If it occurs inside the group, the terminal considers the in-group counting result when counting; if it occurs between the groups, the terminal also needs to consider the inter-group size when counting. In this way, the accuracy of the estimation is improved with less signaling cost, and the prediction result is more accurate, the applicable scenario is more extensive, and the air interface signaling is simple.
  • the embodiment of the invention further provides a method for estimating the mobile state of the terminal, as described in Embodiment 2 below.
  • Example 2
  • FIG. 8 is a flowchart of a method for estimating a mobile terminal state according to an embodiment of the present invention. The method is applied to a base station. Referring to FIG. 8, the method includes:
  • Step 801 The base station provides the network topology information to the terminal by using a broadcast or unicast mode, so that the terminal determines, according to the network topology information, whether the handover or the cell reselection occurs between groups or groups, and according to the determination result, the handover or The cell reselection is counted, and then the mobile state of the terminal is estimated based on the counting result.
  • the network topology information includes a top-level cell of the current cell and an identifier thereof.
  • the base station may provide related network topology information to the terminal by means of broadcast or unicast. Specifically, the base station may notify the terminal, which cell of the top cell of the current cell (ie, the cell covering itself), such as itself or other cells, if it is itself, may not report separately (in fact, its own identifier is in other It can be obtained in the process; if it is another cell, it can also report what the identifier of this top-level cell is.
  • the identifier of the cell may be a physical identifier of the cell or another type of cell identifier.
  • the terminal finds that the target cell and the top cell of the source cell are different in handover or cell reselection, it is determined that the handover or the cell reselection occurs between the groups; in other cases, it is determined that the handover or the cell reselection is Occurs within the group. Further, the estimation of the movement state of the terminal is performed by the method of the first embodiment. It should be pointed out here that in actual network deployment, the cell may be covered by many layers, two layers, three layers or more. The top layer here is preferably the one with the largest coverage area. At the same time, in an actual network, a certain cell may not be completely covered by other cells, but only partially covered, or a cell is simultaneously covered by two or more cells.
  • the network side may set a group according to actual conditions.
  • the partially covered cells may be set as an independent group, or may be grouped with other cells, and the top-level cells in each group may also be set by the network side according to actual conditions.
  • the size of the cell referred to in the present invention may be the actual physical size of the cell, such as a radius or a diameter, or may be a logical size set by the network according to requirements, such as a weighted size, a size level of the cell, and the like.
  • the embodiment of the invention proposes a new method for estimating the mobile state of a terminal in a mobile communication system.
  • the base station sends the deployment information of the network to the terminal, such as the identifier of the high-level cell. Based on the received information, the terminal can determine whether the handover or cell reselection occurs within the group or between the groups. If it occurs inside the group, the terminal considers the in-group counting result when counting; if it occurs between the groups, the terminal also needs to consider the inter-group size when counting. In this way, the accuracy of the estimation is improved with less signaling cost, and the prediction result is more accurate, the applicable scenario is more extensive, and the air interface signaling is simple.
  • the embodiment of the present invention further provides a terminal, as described in the following Embodiment 3.
  • the principle of the terminal is similar to that of the foregoing Embodiment 1, and therefore, the implementation of the terminal can be referred to the method of Embodiment 1. Implementation, repetition will not be repeated.
  • FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal includes: a receiving unit 91, which receives network topology information delivered by a network side;
  • the network side may be a macro base station, such as an eNB, or other small base stations, such as RRH, Pico, Relay, HeNB, and the like.
  • a macro base station such as an eNB
  • other small base stations such as RRH, Pico, Relay, HeNB, and the like.
  • a determining unit 92 which determines, according to network topology information received by the receiving unit 91, whether handover or cell reselection occurs between groups or groups;
  • a counting unit 93 when the determining unit 92 determines that handover or cell reselection occurs between groups, counting the handover or cell reselection according to the inter-group size; determining, at the determining unit, that handover or cell reselection occurs When in the group, the handover or cell reselection is counted according to the result of the intra-group mobile counting;
  • the estimating unit 94 estimates the moving state of the terminal based on the counting result of the counting unit 93.
  • the size of the group is the size of the macro cell in the group and when the terminal moves out of the current group.
  • the maximum value in the intra-group count results in the previous group.
  • the inter-group size is the sum of the intra-group macro cell size and the intra-group count result in the current group when the terminal moves out of the current group.
  • the inter-group size is a result of the intra-group counting result when the terminal moves out of the current group; when there is no smaller cell in the group, the inter-group size is an intra-group macro. The size of the cell.
  • the intra-group mobility count result is a count of the smaller cells that were handed over to the handover or cell when moving within the group.
  • the intra-group mobility count result is a sum of a count result of a smaller cell switched or cell reselected when moving within a group and a size of a macro cell within the group, wherein if there is no macro in the group For the cell, the intra-group mobility count result is a count result of a smaller cell that is switched when the group moves or the cell is reselected.
  • the embodiment of the present invention provides that the terminal determines, according to the received information, whether the handover or the cell reselection occurs within the group or between the groups. If it occurs inside the group, the in-group counting result is taken into account when counting; if it occurs between groups, the inter-group size is also taken into account when counting. In this way, the accuracy of the estimation is improved with less signaling cost, and the prediction result is more accurate, the applicable scenario is more extensive, and the air interface signaling is simple.
  • the embodiment of the present invention further provides a base station, as described in Embodiment 4 below.
  • the principle of the problem solved by the base station is similar to that of the foregoing Embodiment 2. Therefore, the implementation of the base station can be referred to the method of Embodiment 2. Implementation, repetition will not be repeated.
  • the base station includes: a sending unit 101, which provides network topology information to a terminal by using a broadcast or unicast mode, so that the terminal determines the handover according to the network topology information. Or whether cell reselection occurs between groups or groups, and the handover or cell reselection is counted according to the determination result, and then the mobile state of the terminal is estimated according to the counting result.
  • a sending unit 101 which provides network topology information to a terminal by using a broadcast or unicast mode, so that the terminal determines the handover according to the network topology information. Or whether cell reselection occurs between groups or groups, and the handover or cell reselection is counted according to the determination result, and then the mobile state of the terminal is estimated according to the counting result.
  • the network topology information includes a top-level cell of the current cell and an identifier thereof.
  • the base station may provide related network topology information to the terminal by means of broadcast or unicast. Specifically, the base station may notify the terminal, which cell of the top cell of the current cell (ie, the cell covering itself), such as itself or other cells, if it is itself, may not report separately (in fact, its own identifier is in other It can be obtained in the process; if it is another cell, it can also report what the identifier of this top-level cell is.
  • the identifier of the cell may be a physical identifier of the cell or another cell identifier.
  • the terminal finds that the target cell and the top cell of the source cell are different when switching or cell reselection, it is determined that handover or cell reselection occurs. In the group; in other cases, it is determined that the handover or cell reselection occurs within the group. Further, the estimation of the movement state of the terminal is performed by the method of the first embodiment.
  • the base station proposed by the embodiment of the present invention sends the deployment information of the network to the terminal, such as the identifier of the high-layer cell. Based on the received information, the terminal can determine whether the handover or cell reselection occurs within the group or between the groups. If it occurs inside the group, the terminal considers the in-group counting result when counting; if it occurs between groups, the terminal also needs to consider the inter-group size when counting. In this way, the accuracy of the estimation is improved with less signaling cost, and the prediction result is more accurate, the applicable scenario is more extensive, and the air interface signaling is simple.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a terminal, the program causes the computer to execute the method of estimating the mobile state of the terminal described in Embodiment 1 in the terminal.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method for estimating the mobile state of the terminal described in Embodiment 1 in the terminal.
  • the embodiment of the present invention also provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the method of estimating the mobile state of the terminal described in Embodiment 2 in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to perform the method of estimating the mobile state of the terminal described in Embodiment 2 in the base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Abstract

本发明实施例提供了一种估计终端移动状态的方法和装置，所述方法包括：终端根据接收到的网络拓扑信息确定切换或小区重选是发生在组间还是组内；如果切换或小区重选发生在组间，则终端根据组间大小对所述切换或小区重选进行计数；如果切换或小区重选发生在组内，则终端根据组内移动计数结果对所述切换或小区重选进行计数；终端根据计数结果估计终端的移动状态。通过本发明实施例的方法和装置，以较少的信令代价，提高了终端移动状态的估计的精确度，不仅预测结果更加准确，适用的场景更加广泛，且空口信令简单。

Description

一种估计终端移动状态的方法和装置 技术领域
本发明涉及通信系统，尤其涉及一种在移动通信系统中估计终端移动状态的方法 和装置。 背景技术
在无线移动通信系统中， 为了保证终端的移动性， 终端需要在连接模式下进行切 换或者在空闲模式下进行小区重选。
在连接模式下， 为了保证切换的正确触发， 终端需要通过 RRM (Radio Resource
Management)测量信号质量，如果在规定的一段时间内（称之为触发时间 （TTT: Time to Trigger) ), 测量结果一直能够满足一定条件（称之为事件的触发条件）， 那么， 终 端就会向基站报告测量结果。基站可以根据测量结果来决定是否启动切换过程。如图 1 所示， 如果触发事件定义为 "当前服务小区的信号质量低于某个阈值"， 那么只有 在测量值在触发时间内一直低于这个阈值， 终端才会向基站报告测量结果。
在这个过程中， 触发时间和事件的触发条件都可以影响切换的成功率。例如， 当 触发事件是"当前服务小区的信号质量低于某个阈值"时， 这个触发事件可以作为触 发切换的条件。因为服务小区从得到测量报告到触发切换、切换执行还需要额外的时 间， 当阈值规定的过低时， 有可能会发生虽然终端已经将测量结果报告上去， 但是当 前服务小区的信号质量迅速恶化， 已经无法执行随后的触发切换等动作， 这时就会出 现终端的掉话。当阈值规定的过高时， 又可能出现当前服务小区的信号质量还足以维 持与终端的通信， 但是目标小区的信号质量还不足够好的情况， 这时， 也会出现终端 的掉话问题。 与此同时， 触发时间也可以影响切换的效果。 当触发时间过长时， 服务 小区的质量会额外的恶化， 这个时候服务小区的服务质量不足以支持后续的切换操 作， 由此导致终端发生掉话。 当触发时间过短时， 服务小区的质量可能只是发生短暂 波动，信号质量很可能会很快恢复， 而这个时候终端从当前服务小区切走而目标小区 的质量又不足够好， 这个时候终端就容易掉话。
目前， 触发时间的设定与很多条件相关， 比如： 信道的静态变化情况与终端的速 度。信道的静态变化情况指的是当终端静止时， 终端与基站之间的信道变化情况： 如 果信道波动范围较大， 那么一般情况下， 需要把触发时间设定的较长， 来平滑信道的 过大波动； 反之， 如果信道波动范围较少， 较平稳， 触发时间可以设定较短。 考虑终 端速度时， 终端速度越快， 触发时间需要较短一些， 以防止信道随着用户位置变化迅 速的变化； 反之， 终端速度较慢， 则需要将触发时间设定较长一些。
由于信道的静态变化情况非常难以判断，在现有网络中，一般先根据一般意义下 的情况设定触发时间， 如果要进行修正， 则由终端估计自己的移动状态， 查找到对应 的修正因子，对原来的触发时间乘以这个修正因子。一般来讲， 修正因子一般小于 1， 速度越快， 修正因子越小。
同样的， 在空闲模式下， 当终端进行小区重选时， 终端也需要对相邻基站进行测 量，用来判断是否重选到相邻小区。只有在整个重选时间内相邻小区的测量评估结果 都好于当前服务小区， 终端才可以重选到相邻小区。重选中的重选时间与切换中的触 发时间类似， 也需要根据终端的移动状态对重选时间进行修正。
另外， 当终端处于空闲模式下，对服务小区的测量评估也需要通过与其移动状态 相关的修正引子进行修正:速度越快，修正因子使得对当前服务小区的评估更加不利， 趋向于重选到相邻小区； 速度越慢， 修正因子使得对当前服务小区的评估更加有利， 趋向于继续在当前小区接收服务。
发明人在实现本发明的过程中发现，现有系统对终端移动状态的估计方案， 要么 没有考虑移动路径上小区的大小， 要么在终端移动过程中发生了重复计数， 要么在终 端移动过程中发生了遗漏计数， 导致对终端移动状态的估计不准确。
下面列出了对于理解本发明和常规技术有益的文献， 通过引用将它们并入本文 中， 如同在本文中完全阐明了一样。
[文献 1]： 3GPP TS 36.331 V10.2.0(2011-06) Radio Resource Control (RRC) specification. (Release 10)。
[文献 2]： R2-114219, Discussion on mobile state detection for HetNet, ITRI。
[文献 3]: R2-113796, Discussion on enhancement of mobility state estimation, ZTE。 应该注意， 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明， 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
本发明实施例的目的在于提供一种实现较为简单、信令负载较小、移动状态估计 更加准确的估计终端移动状态的方法和装置。
根据本发明实施例的一个方面， 提供了一种估计终端移动状态的方法， 其中， 所 述方法包括：
终端根据接收到的网络拓扑信息确定切换或小区重选是发生在组间还是组内； 如果切换或小区重选发生在组间， 则终端根据组间大小对所述切换或小区重选进 行计数；
如果切换或小区重选发生在组内， 则终端根据组内移动计数结果对所述切换或小 区重选进行计数；
终端根据计数结果估计终端的移动状态。
根据本发明实施例的另一个方面， 提供了一种终端， 其中， 所述终端包括： 接收单元， 其接收网络侧下发的网络拓扑信息；
确定单元， 其根据接收到的网络拓扑信息确定切换或小区重选是发生在组间还是 组内；
计数单元， 其在所述确定单元确定切换或小区重选发生在组间时， 根据组间大小 对所述切换或小区重选进行计数； 在所述确定单元确定切换或小区重选发生在组内 时， 根据组内移动计数结果对所述切换或小区重选进行计数；
估计单元， 其根据所述计数单元的计数结果估计终端的移动状态。
根据本发明实施例的再一个方面， 提供了一种估计终端移动状态的方法， 其中， 所述方法包括：
基站将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端根据所述网络 拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果对所述切换或 小区重选进行计数， 然后根据计数结果估计终端的移动状态。
根据本发明实施例的又一个方面， 提供了一种基站， 其中， 所述基站包括： 发送单元， 其将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端根据 所述网络拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果对所 述切换或小区重选进行计数， 然后根据计数结果估计终端的移动状态。
根据本发明实施例的一个方面， 提供了一种计算机可读程序， 其中当在终端中执 行该程序时，该程序使得计算机在所述终端中执行前述应用于终端的估计终端移动状 态的方法。
根据本发明实施例的另一个方面， 提供了一种存储有计算机可读程序的存储介 质，其中该计算机可读程序使得计算机在终端中执行前述应用于终端的估计终端移动 状态的方法。
根据本发明实施例的再一个方面， 提供了一种计算机可读程序， 其中当在基站中 执行该程序时，该程序使得计算机在所述基站中执行前述应用于基站的估计终端移动 状态的方法。
根据本发明实施例的另一个方面， 提供了一种存储有计算机可读程序的存储介 质，其中该计算机可读程序使得计算机在基站中执行前述应用于基站的估计终端移动 状态的方法。
本发明实施例的有益效果在于：本发明实施例提出了一种在移动通信系统中估计 终端移动状态的新方法。基站将网络的部署信息发送给终端，比如高层小区的识别符。 根据接收到的信息， 终端可以判断切换或小区重选是发生在组内部还是组之间。如果 是发生在组的内部， 终端在计数时考虑组内计数结果； 如果发生在组之间， 终端在计 数时还要考虑组间大小。 通过这种方式， 以较少的信令代价， 提高了估计的精确度， 不仅预测结果更加准确， 适用的场景更加广泛， 且空口信令简单。
参照后文的说明和附图，详细公开了本发明的特定实施方式， 指明了本发明的原 理可以被采用的方式。应该理解， 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用， 与其它实施方式中的特征相组合， 或替代其它实施方式中的 特征。
应该强调， 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在， 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘 制的， 而只是为了示出本发明的原理。 为了便于示出和描述本发明的一些部分， 附图 中对应部分可能被放大或縮小。在本发明的一个附图或一种实施方式中描述的元素和 特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在 附图中，类似的标号表示几个附图中对应的部件， 并可用于指示多于一种实施方式中 使用的对应部件。 在附图中：
图 1是现有技术中测量报告触发时间示意图；
图 2是本发明实施例提供的估计终端移动状态的方法流程图；
图 3是终端在小区间切换的示意图；
图 4是终端的移动路径不同导致对移动状态估计不准确的情形示意图； 图 5是采用改进方法 1对终端移动进行计数的示意图；
图 6是采用改进方法 2对终端移动进行计数的一个场景示意图；
图 7是采用改进方法 2对终端移动进行计数的另一个场景示意图；
图 8是本发明实施例提供的应用于基站的估计终端移动状态的方法流程图； 图 9是本发明实施例提供的终端组成示意图；
图 10是本发明实施例提供的基站组成示意图。 具体实施方式
参照附图， 通过下面的说明书， 本发明实施例的前述以及其它特征将变得明显。 这些实施方式只是示例性的， 不是对本发明的限制。
在本发明实施例中， 为了表述方便， 在对终端进行移动状态估计的过程中， 对于 宏小区和其覆盖范围之内的较小小区称之为一个 "组"， 对于独立的宏小区 （即没有 较小小区在覆盖范围之内）或者独立的较小小区（即没有宏小区覆盖自己）也称之为 一个"组"。 其中， 宏小区例如可以是 eNB (evolved Node B， 演进型基站）覆盖的小 区，较小小区例如可以是 RRH (Remote Radio Head,远端无线头）、 Pico (微微基站）、 Relay (中继）、 HeNB (Home eNB, 家庭基站） 等覆盖的小区。
本发明实施例提供了一种估计终端移动状态的方法， 如下面的实施例 1所述。 实施例 1
图 2是本发明实施例提供的估计终端移动状态的方法流程图， 请参照图 2， 该方 法包括：
步骤 201 : 终端根据接收到的网络拓扑信息确定切换或小区重选是发生在组间还 是组内；
步骤 202: 如果切换或小区重选发生在组间， 则终端根据组间大小对所述切换或 小区重选进行计数； 如果切换或小区重选发生在组内， 则终端根据组内移动计数结果 对所述切换或小区重选进行计数；
步骤 203: 终端根据计数结果估计终端的移动状态。
在步骤 201中， 为了让终端能够识别出切换或小区重选是发生在组内还是组间， 基站会向该终端发送网络拓扑信息， 通过该网络拓扑信息指示当前小区的顶层小区， 也即覆盖自己的小区。如果没有别的小区覆盖自己， 则认为当前小区的顶层小区是自 己。 在一个实施例中， 基站可以通过单播或广播的方式向终端发送该网络拓扑信息。 在一个实施例中， 该网络拓扑信息还可以包括顶层小区的识别符。具体基站侧的处理 将在以下的实施例中加以说明。通过该网络拓扑信息， 终端可以确定切换或小区重组 是发生在组间， 还是发生在组内。
例如， 终端从小区 1切换到小区 2， 如果小区 1和小区 2报告的顶层小区都是自 己， 则终端可以确定该切换发生在组间， 如图 3 (a) 所示； 如果小区 1报告的顶层 小区是自己，而小区 2报告的顶层小区是小区 1，则终端可以确定该切换发生在组内， 如图 3 (b)所示； 如果小区 1报告的顶层小区是小区 2， 小区 2报告的顶层小区是自 己， 则终端可以确定该切换发生在组内， 如图 3 (c) 所示。
在步骤 202中，组间大小可以是组内宏小区的大小与终端移动出当前组时在当前 组内的组内计数结果中的最大值，也可以是组内宏小区的大小与终端移动出当前组时 在当前组内的计数结果之和。其中， 当组内没有宏小区时， 组间大小就是终端移动出 当前组时在当前组内的组内计数结果； 当组内没有较小小区时， 组间大小就是组内宏 小区的大小。
例如， 假设终端在其移动的路径中移动出第 N-1组 （这里的 "移动出第 N-1组" 是指终端从第 N-1组切换到第 N组或者从第 N-1组小区重新到第 N组） 时， 其计数 结果为 R(N-l) ( R(0)=0 )， 则当终端移动出第 N 组时， 其计数结果为 R(N)=R(N-1)+G(N),其中 G(N)为第 N组的组间大小。在一个实施例中， G(N)=max (组 内宏小区大小， g(N))，如果组内没有宏小区，则 G(N)=g(N)，如果组内没有较小小区， 也即只有一个宏小区， 则 G(N)=组内宏小区大小。 在另一个实施例中， G(N)=组内宏 小区大小 +g(N)。 其中， g(N)为终端在移动出第 N组时在第 N组内的组内计数结果， 如果组内没有宏小区，则 G(N)=g(N)，如果组内没有较小小区，也即只有一个宏小区， 则 G(N)=组内宏小区大小。
在步骤 202中，组内移动计数结果可以是终端对在组内移动时切换或小区重选出 来的较小小区的计数结果，也可以是终端对在组内移动时切换或小区重选出来的较小 小区的计数结果与组内宏小区的大小之和。其中， 当组内没有宏小区时， 组内移动计 数结果就是终端在组内移动时对切换或小区重选出较小小区的计数结果。
例如， 同样假设终端在其移动的路径中移动出第 N-1组（这里的 "移动出第 N-1 组"是指终端从第 N-1组切换到第 N组， 或者从第 N-1组小区重新到第 N组） 时， 其计数结果为 R(N-l) ( R(0)=0 )， 则当终端在第 N 组内移动时， 其计数结果为 r(N,m)=R(N-l)+g(N, m), 其中， g(N, m)是终端移动出第 N组内第 m个较小小区的组 内计数结果。 在一个实施例中， g(N, m)为终端在组内移动时只对切换或重选出来的 较小小区计数的结果， 当组内没有较小小区 （即该组为独立的宏小区） 时， g(N,
Figure imgf000009_0001
在另外一个实施例中， g(N, m)为终端在组内移动时只对切换或重选出来 的较小小区计数结果 +组内宏小区的大小， 其中， g(N, 0)=组内宏小区的大小， 即只要 终端移动进第 N组内， 组内计数的初始值为宏小区的大小。 在这个实施例中， 当组 内没有宏小区时， 组内宏小区的大小为零， 退化为前一个实施例； 当组内没有较小小 区时， g(N, m)= g(N)=宏小区大小。
在步骤 202中， 对于 G(N)和 g(N, m)定义的不同组合， 当 G(N)采用第一种实施 方式而 g(N, m)采用第二种实施方式时， G(N)=g(N)。
为了使本实施例的方法及其效果更加清楚易懂，以下通过具体举例和与现有计数 方法进行对比的方式对本实施例的方法的效果进行说明。
图 4 为终端的移动路径不同导致采用现有的方法对移动状态估计不准确的情形 示意图。如图 4所示，采用现有的计数方法，基站触发终端进行移动状态检测，包括: 基站通过广播（当终端处于空闲模式下）或单播（当终端处于连接模式下）给终端发 送进行触发时间所需要的参数： 计数时间段， 修正的计数时间段， 高阈值、 中阈值。 终端在上述规定的计数时间段内对切换或小区重选次数进行计数。 当计数时间结束 时， 如果计数结果大于高阈值时， 终端判断自己处于高速移动状态； 如果计数结果不 高于高阈值但是高于中阈值， 终端判断自己处于中速移动状态； 如果在修正的计数时 间段内既没有检测出高速移动状态也没有检测出中速移动状态，终端判断自己处于普 通移动状态。在判断出终端的移动状态之后， 由于终端已经提前得到在不同移动状态 下对不同过程（切换或者小区重选）的修正因子， 终端就可以选择出对应于实际判断 出的移动状态的修正因子， 对相应过程进行修正。
然而， 如图 4可知， 终端在对切换或小区重选计数时没有考虑小区的大小。请参 照图 4， 终端分别以同样的实际速度通过路径 1和路径 2移动。 通过路径 1移动时， 由于穿过的小区半径较大， 切换次数明显小于通过路径 2移动时的切换次数。 由此， 终端在两条路径移动时可能得到不同的移动状态。在实际网络中，各个小区的大小可 能差别会比较大， 而且网络的拓扑结构也会比较复杂， 如果在判断终端移动状态时不 考虑小区大小， 都会带来这个问题。
为了克服上述问题，目前提出了多种改进方法，但每种改进方法都各自存在缺陷， 以下通过与本发明实施例的方法进行对比的方式进行说明。
图 5为采用改进方法 1的一个示例。如图 5所示， 基站广播小区的加权大小， 终 端根据接收到的加权大小对移动状态的判断过程进行修正。 比如，宏小区的加权大小 为 1， 微小区的加权大小为 0.3， 这样， 从宏小区切换或小区重选一次， 终端累加 1 ; 而从微小区切换或小区重选一次， 终端累加 0.3。 在这种方法中， 终端的计数结果包 含了小区的大小因素，但是带来了重复计数的问题，使得估计的结果比实际移动速度 要快。 比如， 在图 5中， 当终端沿着虚线移动， 从图中最右边进入小区 1， 在第一次 进入小区 1的计数值为 m。可以看出， 在终端从最左边移动出小区 1时， 终端对小区 1进行了两次计数，对小区 2和 3 各进行了一次计数，计数结果 R=m+2.6。而实际上， 在这个过程中， 最准确的方法应该只对小区 1进行一次计数即可， 即： 最终的计数结 果应该为1 =111+1。
根据本发明实施例提供的方法， 小区 1-3为一个组， 其中， 小区 2和小区 3的顶 层小区是小区 1， 小区 1的顶层小区是自己， 可见， 在终端在图中最左边移动出小区 1时， 即为移动出该组， 则根据组间移动的计数公式， 由于进入小区 1也即进入该组 之前的计数值 R(N-l)为 m，如果采用 G(N)的第一种实施方式和 g(N, m)的第一种实施 方式， 贝 lj g(N)=g(N, 2)=0.6， G(N)=max(l, 0.6)=l , 即该组的组间大小 G(N)为 1， 则得 到该终端的计数结果为： R(N)=R(N-l)+G(N)=m+l。如果采用 G(N)的第一种实施方式 和 g(N, m)的第二种实施方式， 则 g(N)=g(N, 2)==1+0.6=1.6， G(N)=max(l,1.6)=1.6, R(N)=R(N-l)+G(N)=m+1.6。 如果采用 G(N)的第二种实施方式和 g(N, m)的第一种实 施方式， 贝 Ij g(N)=g(N, 2)=0.6， G(N)= 1+0.6=1.6, R(N)=R(N-l)+G(N)=m+1.6。 如果采 用 G(N)的第二种实施方式和 g(N, m)的第二种实施方式， 则 g(N)=g(N, 2)=1.6， G(N)= 1+1.6=2.6, R(N)=R(N-l)+G(N)=m+2.6。 从上述分析可以看出， G(N) 禾 B g(N, m)的不 同实施方式可以带来不同的计数结果， 同时， 如果 G(N) 和 g(N, m)同时采用第二种 实施方式， 其计数结果也会带来的一定的重复计数。 但只要 G(N) 和 g(N, m)不同时 采用各自的第二种实施方式， 都能带来优于现有技术的效果。
图 6和图 7为采用改进方法 2的两个示例。如图 6和图 7所示， 该方法只对网络 中的宏小区进行计数， 对其他较小小区 （比如微小区、 中继基站等）不进行计数。 这 样， 进行计数的小区大小均匀， 对移动预测的结果就比较准确。 为了让终端识别出宏 小区， 可以采取两种方式：
1 ) 将基站的物理识别符域分为两个集合， 宏小区的物理识别符在其中一个独立 集合中选择，其他小区的物理识别符在另外一个集合中选择。 由于物理识别符是终端 进行正常通信、 即使不进行移动状态估计也要获得的信息， 这样， 通过物理识别符域 的划分， 终端就可以自然额外得到 "当前小区是否是宏小区" 的信息。
2) 基站广播新的消息， 来指示自己是否需要被终端计数。 比如， 基站可以广播
1比特的信息位， " 1 "为自己需要被计数， "0"是不可以被计数。
通过以上两种指示方式， 终端可以获知某个基站是否需要被计数。但是， 这种方 法会带来遗漏计数的问题。在图 6中， 若干独立的较小小区 (小区 2和 3) 在终端的移 动路径上， 如果采用指示方式 1， 小区 2和 3 将不被计数。 在图 7中， 若干较小小区 (小区 2~5)在宏小区 1的覆盖范围之内。 当某些终端在整个计数时间段内或者在计 数段快要结束的时间内在小区 1的覆盖范围之内移动， 无论采取方式 1或方式 2， 切 换出小区 2~5将不会被计数， 如此就会产生遗漏计数的问题。 如果产生了遗漏计数， 会造成估计的移动状态低于实际速度的情况。
根据本发明实施例的方法， 对于图 6的场景， 每一个小区都是一个组， 可见， 该 终端的移动过程属于组间移动， 对于小区 1、 4， 每一个组只有一个宏小区， 对于小 区 2、 3， 每一个组只有一个较小小区， 则根据本发明实施例的组间计数方式， 得到 该终端移动的计数结果为：两个宏小区（小区 1和小区 4)的大小和两个较小小区（小 区 2和小区 3) 的组内计数结果之和。 假设小区 4为终端在计数过程中移动出的第 N 个组， 则 R (N) =R(n-4)+G (N-3) +G (N-2) +G (N-1 ) +G (N) = R(n-4)+宏小区 1的大小 +较小小区 2的大小 +较小小区 3的大小 +宏小区 4的大小。对于图 7的场景， 小区 1-5为一个组，可见，该终端在小区 1内的移动过程属于组内移动。假定小区 1~5 所在的组为终端在计数过程中进入的第 N个组， 小区 2~4是终端在第 N组内移动出 去的第 1~3个较小小区，则根据本发明实施例的组内计数方式的第一种计数方式，得 到该终端移动的计数结果为： r ( N,3 ) =R ( N-l ) +g ( N,3 ) = R ( N-l ) +较小小区 2 的大小 +较小小区 3的大小 +较小小区 4的大小。
本发明实施例提出了一种在移动通信系统中估计终端移动状态的新方法。基站将 网络的部署信息发送给终端， 比如高层小区的识别符。根据接收到的信息， 终端可以 判断切换或小区重选是发生在组内部还是组之间。如果是发生在组的内部， 终端在计 数时考虑组内计数结果； 如果发生在组之间， 终端在计数时还要考虑组间大小。通过 这种方式， 以较少的信令代价， 提高了估计的精确度， 不仅预测结果更加准确， 适用 的场景更加广泛， 且空口信令简单。
本发明实施例还提供了一种估计终端移动状态的方法， 如下面的实施例 2所述。 实施例 2
图 8为本发明实施例提供的估计终端移动状态的方法的流程图，该方法应用于基 站， 请参照图 8， 该方法包括：
步骤 801 : 基站将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端根 据所述网络拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果对 所述切换或小区重选进行计数， 然后根据计数结果估计终端的移动状态。
其中， 所述网络拓扑信息包括当前小区的顶层小区及其识别符。
在本实施例中， 为了让终端能够识别出切换或小区重选是发生在组内还是组间， 基站可以采用广播或单播的方式将相关的网络拓扑信息提供给终端。具体来讲，基站 可以通知终端， 当前小区的顶层小区（即覆盖自己的小区）是哪一个小区， 例如自己 或者其他小区， 如果是自己， 可以不单独报告（实际上， 自己的识别符在其他过程中 可以得到）； 如果是其他小区， 还可以报告这个顶层小区的识别符是什么。 其中， 小 区的识别符可以是小区的物理识别符或者其他类型的小区标识。这样， 当终端在切换 或小区重选时，发现目标小区和源小区的顶层小区不同时， 则判断为切换或小区重选 是发生在组间； 其他情况下， 判断为切换或小区重选是发生在组内。进而通过实施例 1的方法进行终端的移动状态的估计。 这里需要指出的是， 在实际网络部署中， 小区可能被很多层覆， 两层， 三层或者 更多。 这里的顶层， 优选的为覆盖面积最大的那一层。 同时， 在实际网络中， 可能某 个小区不是完整地被其他小区覆盖， 只是部分覆盖， 或者某个小区被两个或更多小区 同时覆盖， 这个时候， 网络侧可以根据实际情况设定分组， 比如， 可以将被部分覆盖 的小区设定为独立的组， 也可以与其他小区组成一个组，每个组内的顶层小区也可以 根据实际情况由网络侧设定。此外， 本发明所指的小区大小， 可以是小区的实际物理 尺寸， 比如半径或者直径， 也可以是网络根据需要设定的逻辑大小， 比如加权大小， 小区的大小等级等。
本发明实施例提出了一种在移动通信系统中估计终端移动状态的新方法。基站将 网络的部署信息发送给终端， 比如高层小区的识别符。根据接收到的信息， 终端可以 判断切换或小区重选是发生在组内部还是组之间。如果是发生在组的内部， 终端在计 数时考虑组内计数结果； 如果发生在组之间， 终端在计数时还要考虑组间大小。通过 这种方式， 以较少的信令代价， 提高了估计的精确度， 不仅预测结果更加准确， 适用 的场景更加广泛， 且空口信令简单。
本发明实施例还提供了一种终端， 如下面的实施例 3所述， 由于该终端解决问题 的原理与上述实施例 1的方法相似， 因此， 该终端的实施可以参见实施例 1的方法的 实施， 重复之处不再赘述。
实施例 3
图 9为本发明实施例的终端的组成示意图， 请参照图 9， 该终端包括： 接收单元 91， 其接收网络侧下发的网络拓扑信息；
其中， 网络侧可以是宏基站，例如 eNB，也可以是其他小基站，例如 RRH、 Pico, Relay、 HeNB等。
确定单元 92， 其根据接收单元 91接收到的网络拓扑信息确定切换或小区重选是 发生在组间还是组内；
计数单元 93， 其在所述确定单元 92确定切换或小区重选发生在组间时， 根据组 间大小对所述切换或小区重选进行计数；在所述确定单元确定切换或小区重选发生在 组内时， 根据组内移动计数结果对所述切换或小区重选进行计数；
估计单元 94， 其根据所述计数单元 93的计数结果估计终端的移动状态。
在一个实施例中，所述组间大小为组内宏小区的大小与终端移动出当前组时在当 前组内的组内计数结果中的最大值。在另一个实施例中，所述组间大小为组内宏小区 大小与终端移动出当前组时在当前组内的组内计数结果之和。其中， 当组内没有宏小 区时，所述组间大小为终端移动出当前组时在当前组内的组内计数结果； 当组内没有 较小小区时， 所述组间大小为组内宏小区的大小。
在一个实施例中，所述组内移动计数结果为在组内移动时对切换或小区重选出来 的较小小区的计数结果。在另一个实施例中，所述组内移动计数结果为在组内移动时 切换或小区重选出来的较小小区的计数结果与组内宏小区的大小之和，其中， 如果组 内没有宏小区，则所述组内移动计数结果为对在组内移动时切换或小区重选出来的较 小小区的计数结果。
本发明实施例提出终端根据接收到的信息判断切换或小区重选是发生在组内部 还是组之间。如果是发生在组的内部， 则在计数时考虑组内计数结果； 如果发生在组 之间， 则在计数时还要考虑组间大小。 通过这种方式， 以较少的信令代价， 提高了估 计的精确度， 不仅预测结果更加准确， 适用的场景更加广泛， 且空口信令简单。
本发明实施例还提供了一种基站， 如下面的实施例 4所述， 由于该基站解决问题 的原理与上述实施例 2的方法相似， 因此， 该基站的实施可以参见实施例 2的方法的 实施， 重复之处不再赘述。
实施例 4
图 10为本发明实施例的基站组成示意图， 请参照图 10， 该基站包括： 发送单元 101， 其将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端 根据所述网络拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果 对所述切换或小区重选进行计数， 然后根据计数结果估计终端的移动状态。
其中， 所述网络拓扑信息包括当前小区的顶层小区及其识别符。
在本实施例中， 为了让终端能够识别出切换或小区重选是发生在组内还是组间， 基站可以采用广播或单播的方式将相关的网络拓扑信息提供给终端。具体来讲，基站 可以通知终端， 当前小区的顶层小区（即覆盖自己的小区）是哪一个小区， 例如自己 或者其他小区， 如果是自己， 可以不单独报告（实际上， 自己的识别符在其他过程中 可以得到）； 如果是其他小区， 还可以报告这个顶层小区的识别符是什么。 其中， 小 区的识别符可以是小区的物理识别符或者其他小区标识。这样， 当终端在切换或小区 重选时，发现目标小区和源小区的顶层小区不同时， 则判断为切换或小区重选是发生 在组间； 其他情况下， 判断为切换或小区重选是发生在组内。进而通过实施例 1的方 法进行终端的移动状态的估计。
本发明实施例提出的基站将网络的部署信息发送给终端， 比如高层小区的识别 符。终端根据接收到的信息可以判断切换或小区重选是发生在组内部还是组之间。如 果是发生在组的内部， 终端在计数时考虑组内计数结果； 如果发生在组之间， 终端在 计数时还要考虑组间大小。通过这种方式， 以较少的信令代价，提高了估计的精确度， 不仅预测结果更加准确， 适用的场景更加广泛， 且空口信令简单。
本发明实施例还提供了一种计算机可读程序，其中当在终端中执行该程序时， 该 程序使得计算机在所述终端中执行实施例 1所述的估计终端移动状态的方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质，其中该计算机可 读程序使得计算机在终端中执行实施例 1所述的估计终端移动状态的方法。
本发明实施例还提供了一种计算机可读程序，其中当在基站中执行该程序时， 该 程序使得计算机在所述基站中执行实施例 2所述的估计终端移动状态的方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质，其中该计算机可 读程序使得计算机在基站中执行实施例 2所述的估计终端移动状态的方法。
本发明以上的装置和方法可以由硬件实现， 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序， 当该程序被逻辑部件所执行时， 能够使该逻辑部件实现 上文所述的装置或构成部件， 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质， 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚， 这 些描述都是示例性的， 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围 内。

Claims

权 利 要 求 书
1、 一种估计终端移动状态的方法， 其中， 所述方法包括：
终端根据接收到的网络拓扑信息确定切换或小区重选是发生在组间还是组内； 如果切换或小区重选发生在组间， 则终端根据组间大小对所述切换或小区重选进 行计数；
如果切换或小区重选发生在组内， 则终端根据组内移动计数结果对所述切换或小 区重选进行计数；
终端根据计数结果估计终端的移动状态。
2、 根据权利要求 1所述的方法， 其中，
所述组间大小为组内宏小区的大小与终端移动出当前组时在当前组内的组内计 数结果中的最大值； 或者
所述组间大小为组内宏小区大小与终端移动出当前组时在当前组内的组内计数 结果之和。
3、 根据权利要求 2所述的方法， 其中，
当组内没有宏小区时， 所述组间大小为终端移动出当前组时在当前组内的组内计 数结果；
当组内没有较小小区时， 所述组间大小为组内宏小区的大小。
4、 根据权利要求 1所述的方法， 其中，
所述组内移动计数结果为终端在组内移动时对切换或小区重选出来的较小小区 的计数结果； 或者
所述组内移动计数结果为终端在组内移动时对切换或小区重选出来的较小小区 的计数结果与组内宏小区的大小之和。
5、 根据权利要求 4所述的方法， 其中，
如果组内没有宏小区， 则所述组内移动计数结果为终端在组内移动时切换或小区 重选出来的较小小区的计数结果。
6、 一种终端， 其中， 所述终端包括：
接收单元， 其接收网络侧下发的网络拓扑信息；
确定单元， 其根据所述接收单元接收到的网络拓扑信息确定切换或小区重选是发 生在组间还是组内；
计数单元， 其在所述确定单元确定切换或小区重选发生在组间时， 根据组间大小 对所述切换或小区重选进行计数； 在所述确定单元确定切换或小区重选发生在组内 时， 根据组内移动计数结果对所述切换或小区重选进行计数；
估计单元， 其根据所述计数单元的计数结果估计终端的移动状态。
7、 根据权利要求 6所述的终端， 其中，
所述组间大小为组内宏小区的大小与终端移动出当前组时在当前组内的组内计 数结果中的最大值； 或者
所述组间大小为组内宏小区大小与终端移动出当前组时在当前组内的组内计数 结果之和。
8、 根据权利要求 7所述的终端， 其中，
当组内没有宏小区时， 所述组间大小为终端移动出当前组时在当前组内的组内计 数结果；
当组内没有较小小区时， 所述组间大小为组内宏小区的大小。
9、 根据权利要求 6所述的终端， 其中，
所述组内移动计数结果为终端在组内移动时对切换或小区重选出来的较小小区 的计数结果； 或者
所述组内移动计数结果为终端在组内移动时对切换或小区重选出来的较小小区 的计数结果与组内宏小区的大小之和。
10、 根据权利要求 9所述的终端， 其中，
如果组内没有宏小区， 则所述组内移动计数结果为终端在组内移动时对切换或小 区重选出较小小区的计数结果。
11、 一种估计终端移动状态的方法， 其中， 所述方法包括：
基站将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端根据所述网络 拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果对所述切换或 小区重选进行计数， 然后根据计数结果估计终端的移动状态。
12、 根据权利要求 11所述的方法， 其中，
所述网络拓扑信息包括当前小区的顶层小区。
13、 一种基站， 其中， 所述基站包括： 发送单元， 其将网络拓扑信息通过广播或者单播方式提供给终端， 以便终端根据 所述网络拓扑信息确定切换或小区重选是发生在组间还是组内，并根据确定结果对所 述切换或小区重选进行计数， 然后根据计数结果估计终端的移动状态。
14、 根据权利要求 13所述的基站， 其中，
所述网络拓扑信息包括当前小区的顶层小区。
15、 一种计算机可读程序， 其中当在终端中执行该程序时， 该程序使得计算机在 所述终端中执行如权利要求 1至 5中的任意一项权利要求所述的估计终端移动状态的 方法。
16、 一种存储有计算机可读程序的存储介质， 其中该计算机可读程序使得计算机 在终端中执行权利要求 1至 5 中的任意一项权利要求所述的估计终端移动状态的方 法。
17、 一种计算机可读程序， 其中当在基站中执行该程序时， 该程序使得计算机在 所述基站中执行如权利要求 11至 12中的任意一项权利要求所述的估计终端移动状态 的方法。
18、 一种存储有计算机可读程序的存储介质， 其中该计算机可读程序使得计算机 在基站中执行权利要求 11至 12中的任意一项权利要求所述的估计终端移动状态的方 法。
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