WO2011011958A1 - 一种测量结果上报及小区切换的方法及系统 - Google Patents

一种测量结果上报及小区切换的方法及系统 Download PDF

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Publication number
WO2011011958A1
WO2011011958A1 PCT/CN2009/076260 CN2009076260W WO2011011958A1 WO 2011011958 A1 WO2011011958 A1 WO 2011011958A1 CN 2009076260 W CN2009076260 W CN 2009076260W WO 2011011958 A1 WO2011011958 A1 WO 2011011958A1
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Prior art keywords
rnc
nodeb
moving speed
measurement
report
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PCT/CN2009/076260
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English (en)
French (fr)
Inventor
朱昀
黄河
王曼
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中兴通讯股份有限公司
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Publication of WO2011011958A1 publication Critical patent/WO2011011958A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to the reporting of cell measurement results of a third generation mobile communication technology applied in a fast motion scenario of a user terminal (such as in a high speed railway, a highway scene) and utilizing the moving speed of the user terminal.
  • the radio access network is composed of a plurality of cellular shaped cells, each of which is covered by a radio signal transmitted by a base station (NodeB) on the cell, and user terminals (UEs) in several cells. And the NodeB is controlled and managed by a Radio Network Controller (RNC). Handoffs often occur in overlapping areas between two cells. The UE gradually switches from the original cell to another new cell due to the UE's mobility; or for a layered network, the UE switches from one level of the cell to a higher level. Or a lower level cell.
  • NodeB base station
  • UEs user terminals
  • RNC Radio Network Controller
  • the implementation of handover is often based on the quality of the received signal of the UE.
  • the UE continuously measures the quality or strength of the received signal of the cell in which it is located (referred to as a serving cell) and a plurality of cells adjacent to the serving cell (referred to as a neighboring cell), and if the signal quality of the serving cell is found to be too low If the signal quality of a neighboring cell is better than the serving cell, the UE reports the measurement result to the RNC, and the RNC decides to switch according to the received measurement result.
  • Chinese patent application with the application number 200510089131.2 discloses another user terminal based
  • the method for switching the moving speed is characterized in that the UE measures its own moving speed. When it finds that its own speed exceeds a certain threshold (this threshold is preset), the UE reports to the network side, and the RNC is After receiving the report, the UE is determined to switch between different hierarchical cells.
  • this threshold is preset
  • the key to achieving accurate and timely switching is accurate measurement and timely measurement reporting.
  • the two prior art techniques described above have problems in supporting high-speed railways, highways, and the like in the case of high-speed sports.
  • the traditional measurement signal quality, reporting measurement result, and decision switching mode are adopted, since the UE is in a high-speed motion state, its actual wireless environment changes drastically, and often, when the measured signal quality is degraded, it is reported to the RNC.
  • the RNC decides to switch, during which time the UE has already moved out of the original serving cell. In this way, the UE loses the wireless coverage, and the handover does not cause a dropped call in time.
  • the key is to perform accurate measurement and timely measurement reporting.
  • One of the objects of the present invention is to provide a method and system for reporting measurement results, which are used to solve the RNC implementation accuracy.
  • the technical solution of the present invention is implemented as follows:
  • a method for reporting measurement results comprising the steps of:
  • the radio network controller sends a measurement initial message to the base station (NodeB), and commands the NodeB to measure the moving speed of the UE and select the measurement result;
  • the base station measures the moving speed of the user terminal (UE);
  • the NodeB reports the moving speed of the UE to the radio network controller by transmitting a measurement report containing the measurement result.
  • the NodeB measures the moving speed of the UE in the connected state in the cell covered by the NodeB; or the RNC specifies which UE or UE to measure the moving speed of the NodeB, and the NodeB measures the moving speed of the specified UE.
  • the NodeB measures the characterization value of the UE for the received signal quality, and/or the Doppler frequency shift of the UE.
  • the characterization value of the received signal quality by the UE refers to a signal to interference ratio (SIR) and/or a received signal power (RSCP) value of the UE to the received signal.
  • SIR signal to interference ratio
  • RSCP received signal power
  • the NodeB sends the measured speed of the UE to the RNC as a gradation value of the moving speed value of the UE measured by the NodeB or the moving speed of the UE.
  • the measurement initial message carries a manner in which the RNC specifies that the NodeB reports the measurement report, and the reporting manner of the measurement report is at least one of a periodic report mode, a trigger report mode, and an RNC command mode.
  • the periodic reporting mode is: the reporting period T is given by the RNC, and the NodeB sends the measurement report of the moving speed of all the UEs in the coverage cell to the RNC by using the T period;
  • the triggering reporting mode is that the speed threshold Th is given by the RNC.
  • the NodeB measures that the moving speed of the UE reaches the threshold Th, the NodeB reports the measurement report of the UE to the RNC.
  • the RNC command mode is that the RNC sends a report command to the NodeB to request the NodeB to report the measurement result of the moving speed of a certain UE.
  • the measurement includes: a mobile station that is measured by the NodeB, and includes a unique identifier of the UE, and may further include a characterization value of the received signal quality measured by the NodeB, and/or Or the Doppler shift of the UE obtained by the NodeB measurement.
  • the NodeB reports the Doppler shift of the UE to the RNC through a dedicated channel (DCH) while transmitting the measurement report to the RNC.
  • the present invention further provides a system for reporting a measurement result, including a base station (NodeB) and a radio network controller (RNC), wherein the NodeB includes a measurement module and a reporting module;
  • the measurement module is configured to measure the moving speed of the user terminal UE in the covered cell
  • the reporting module is configured to report the measurement result of the UE moving speed measured by the measuring module to the RNC in the form of a measurement report.
  • the measurement module includes:
  • a speed measurement module configured to measure a moving speed of the UE
  • An optional received signal quality measurement module configured to measure a characterization value of the received signal quality by the UE
  • An optional Doppler shift measurement module for measuring a Doppler shift of the UE
  • the measurement report reported by the reporting module includes a unique identifier of the UE, a moving speed of the UE, an optional UE characterization value of the received signal quality, and an optional UE Doppler frequency shift.
  • the measurement module measures a moving speed of a UE in a connected state in a cell covered by the cell; or measures a moving speed of the UE specified by the RNC.
  • the moving speed of the UE reported by the reporting module is a level value of the moving speed value of the UE or the moving speed of the UE directly measured by the measuring module.
  • the characterization value of the received signal quality by the UE refers to a signal to interference ratio and/or a received signal power value of the UE to the received signal of the current serving cell.
  • reporting module reports the measurement report is notified to the NodeB by the RNC by measuring the initial message, where the reporting module includes at least one of a periodic reporting module, a trigger reporting module, and a command reporting module:
  • the periodic reporting module is configured to periodically report, to the RNC, a measurement report including the measurement result measured by the measurement module according to the reporting period T given by the RNC;
  • the triggering reporting module is configured to determine, according to the speed threshold value Th given by the RNC, whether the moving speed of the UE reaches the threshold value Th. If yes, report the measurement report including the measurement result measured by the measurement module to the RNC, otherwise the report is not reported;
  • the command reporting module is configured to report, to the RNC, a measurement report including a measurement result for a UE according to the report command sent by the RNC.
  • Another object of the present invention is to provide a cell handover method and system capable of accurately and timely switching based on the method for reporting the cell measurement result.
  • the technical solution of the present invention is implemented as follows:
  • a cell switching method includes the following steps:
  • Step A The base station (NodeB) measures the moving speed of the user terminal (UE) and reports it to the radio network controller (RNC);
  • RNC radio network controller
  • Step B The RNC performs a handover decision on the UE according to the measurement result reported by the NodeB. Further, in step A, the NodeB also measures and reports the characterization value of the received signal quality by the UE. In step B, the RNC performs a handover decision on the UE according to the moving speed of the UE and the characterization value of the received signal quality by the UE.
  • step A the NodeB also measures and reports the Doppler frequency shift of the UE.
  • step B the RNC performs handover decision on the UE according to the moving speed of the UE and the Doppler frequency shift of the UE.
  • the present invention further provides a cell switching system, including:
  • a measurement module that is set in a base station (NodeB) for measuring a moving speed of a user terminal (UE) and reporting it to a radio network controller (RNC);
  • NodeB base station
  • RNC radio network controller
  • a decision module for performing a handover decision to the UE according to the measurement result reported by the NodeB is set in the RNC.
  • cell handover is implemented according to the moving speed of the user terminal, so that the handover becomes more timely and accurate.
  • the measurement speed of the UE measured by the NodeB is higher, and the NodeB measurement reduces the processing load of the user terminal, and does not need to be in the UE. Make any changes on it.
  • the application scenario of the cell handover in the present invention is a handover between any adjacent cells, and is not limited to cell handover between different levels.
  • Embodiment 1 is a flowchart of Embodiment 1 of the present invention.
  • FIG. 2 is a flow chart of Embodiment 2 of the present invention. detailed description
  • the UE When the UE is in a high-speed motion scene, such as on a high-speed railway, moving on a highway, it tends to pass through a cell quickly.
  • the signal strength of the current cell and the neighboring cell is first measured by the UE, and then after the signal strength of the current cell is found to be lower than a certain value, and then the measurement report is requested to be handed over to the RNC, the RNC may not have time yet.
  • the UE Before the decision handover is completed, the UE has already moved out of the original serving cell, resulting in handover failure and dropped calls.
  • the base station can have various methods to measure the moving speed of the UE in real time, and using this information to implement the handover of the UE can improve the timeliness and accuracy of the handover.
  • FIG. 1 is a schematic diagram of a NodeB measuring a UE's moving speed, and reporting the above to an RNC, and the RNC uses the information to determine a handover procedure.
  • Step 101 The RNC sends a measurement initial message to the NodeB, and the NodeB commands the UE to measure the moving speed of the UE and reports the measurement result to it.
  • the NodeB reports to the RNC that the measurement result of the moving speed of the UE is reported to the RNC by placing the measurement result in the measurement report.
  • the so-called measurement initial message is a control message sent by the RNC to the NodeB, which requires the NodeB to measure certain measurement quantities and gives a report of the measurement result.
  • the RNC can send the measurement initial message to the NodeB at any time.
  • the measurement initial sent by the RNC to the base station The message adds an indication that the NodeB is required to measure the moving speed of the UE and the measurement result of the moving speed of the UE to which the NodeB is required.
  • the RNC may send a new measurement initial message to the NodeB to stop or restart the NodeB's measurement of the UE's moving speed and change the NodeB's uplink mode.
  • the NodeB reports the measurement result of the UE moving speed to the RNC, one or a combination of the following three methods may be adopted:
  • the RNC gives a time period T.
  • the NodeB After receiving the measurement initial message, the NodeB sends a measurement report of the measured moving speed of the UE to the RNC in a period of T, and the measurement report includes the UE. Measurement result of moving speed;
  • the RNC gives a threshold Thr of speed.
  • the NodeB measures that the moving speed of a certain UE reaches the threshold Th, the NodeB reports the speed measurement report of the UE to the RNC (the measurement report includes The measurement result of the moving speed of the UE).
  • the RNC requests the NodeB to report the measurement result of the moving speed of a certain UE to the NodeB at any time.
  • Step 102 The base station measures the moving speed of the UE in the cell it covers in real time.
  • the NodeB measures the moving speed of all the UEs in the connected state in the cell covered by the NodeB.
  • the UE is in the connected state, that is, the UE is in the CELL-DCH (Dedicated Channel) state or the CELL-FACH (Forward Access Channel) state, that is, the UE is in the above two channels.
  • the RNC may also specify which UE or UE to measure the moving speed of the UE.
  • the preferred base station of the present invention measures the moving speed of the UE as follows: First, the base station measures the UE. The Doppler shift, while the base station also measures the angle of arrival from the UE signal to the base station antenna, and then deducts the UE's moving speed according to the following Doppler shift formula:
  • V is the moving speed of the UE, indicating the Doppler shift value of the UE, and c is the speed of light (equal to 3*108 m/s), indicating the angle of arrival of the UE signal to the base station antenna.
  • Step 103 If, in step 101, the RNC specifies, in the measurement control message, that the manner in which the NodeB reports the measurement report of the moving speed of the UE is triggered, the NodeB determines the moving speed of the UE, if the moving speed of the UE reaches the set If the speed threshold value Th is determined, then step 104 is performed; otherwise, step 102 is performed;
  • step 101 the RNC specifies in the measurement control message that the manner in which the NodeB reports the measurement report of the UE's moving speed to the periodic report, the NodeB performs step 104 every time period T, and then goes to the RNC in step 104. All measurement reports of the UEs it measures in the cell.
  • Step 104 The base station reports, to the RNC, the measured measurement report of the UE whose moving speed reaches the set speed threshold.
  • the measurement report of the UE includes:
  • the identification number of the UE is uniquely identified, and the identification number may be the wireless link number RL-id occupied by the UE, or the UE for the CELL-DCH state may be the DCH channel number DCH-id occupied by the UE.
  • each radio link is assigned a unique radio link number RL-id, so the radio link number can uniquely represent the UE corresponding to the radio link.
  • the speed value of the UE measured by the NodeB is used as a reference condition for the RNC decision handover.
  • the NodeB reports the measured moving speed of the UE to the RNC, and can directly report the speed value. For example, if the measured UE moving speed is 30m/s, then the NodeB is up to 4 ⁇ (30m/s) precede or the NodeB can report the grading value of the UE moving speed, and the grading value is pre-agreed by the RNC and the NodeB. For example, 0
  • the speed of -30 m/s is predefined as level A
  • the speed of 30-50 m/s is predefined as level B
  • the speed above 50 m/s is predefined as level C.
  • NodeB measures the moving speed of a certain UE It is 70m/s, then it reports the speed of the UE to the RNC as level C.
  • the measurement 4 can also preferably include:
  • Step 105 The RNC receives the measurement report and performs a handover decision to the UE.
  • the RNC After receiving the UE speed measurement report reported by the base station, the RNC determines whether the UE switches to the new cell.
  • the new cell refers to any one of the neighboring lists of the current serving cell where the UE is located.
  • the neighbor cell list is stored in the RNC. It includes several cells geographically adjacent to one cell. For the layered network, it also includes cells in the same geographical area as one cell coverage but in different levels. In the actual high-speed railway and highway wireless networks, the hierarchical network is a more common situation.
  • the public network cell covers the common UEs along the line, and the private network cell covers the high-speed moving UE in the car.
  • the RNC After receiving the UE speed measurement report of the base station, the RNC also indicates to which cell the UE switches to if it decides that the UE performs cell handover.
  • the RNC may calculate the distance that the UE runs in the period by multiplying the reporting period T by the moving speed of the UE, and then accumulate the running distance of the UE in each time period; When the accumulated distance has been reached The boundary of the serving cell where the UE is located, then the decision is switched.
  • the RNC may determine the handover according to the received SIR value of the UE to the serving cell: when the RNC receives the reported measurement report of the moving speed of the UE (indicating the moving speed of the UE) If the SIR value of the serving cell is lower than a higher threshold SIR hlgh , the RNC decides to switch; when the RNC does not receive the reported measurement report of the reported UE moving speed (indicating the UE's The moving speed is low. The SIR value of the UE to the serving cell is lower than a lower threshold SIRiow, and the RNC decides to switch.
  • the NodeB adds measurement information for reporting the UE Doppler frequency shift.
  • the Doppler shift of the UE is due to the frequency offset produced by the Doppler effect of the UE in motion.
  • the RNC combines the UE's moving speed and Doppler shift to facilitate a more accurate handover decision.
  • Step 201 The RNC sends a measurement initial message to the NodeB, and commands the NodeB to measure the moving speed of the UE and reports the measurement result to the measurement report.
  • the RNC requires the NodeB to report the measurement result of the UE's moving speed to the reporting result, that is, the periodic reporting and the triggering reporting.
  • the process description is continued in a periodic reporting manner.
  • the RNC gives a reporting period T.
  • the RNC requires the NodeB to report the Doppler frequency shift of the UE in addition to the moving speed of the UE.
  • the RNC may request the NodeB to report the Doppler shift of the UE by measuring the initial message, or may request the uplink by other means, for example, by using a measurement control message on the RACH (Random Access Channel) channel. NodeB.
  • RACH Random Access Channel
  • Step 202 The NodeB measures the moving speed and Doppler frequency of the UE in the cell it covers in real time.
  • a frequency of mutually transmitting signals is agreed, and the UE sends a signal to the NodeB at this frequency, but due to the Doppler shift generated in the UE motion, the NodeB receives the signal.
  • the NodeB can obtain this deviation value by measurement and further estimate the Doppler shift value of the UE.
  • the method by which the NodeB measures the UE moving speed can be the same as in Embodiment 1.
  • Step 203 The NodeB reports the measurement report including the UE moving speed to the RNC by using the time period T.
  • the NodeB also reports the Doppler shift of the UE to the RNC.
  • the NodeB can report the Doppler shift of the UE to the RNC. It can also be reported by measuring the data. It can also be reported through the data frame of the DCH (Dedicated Channel) channel.
  • DCH Dedicated Channel
  • the measurement of the NodeB to the RNC includes: (1) an identification number uniquely indicating the UE;
  • the speed value of the UE measured by the NodeB can directly report the specific value of the moving speed of the UE measured, and can also report the level value of the moving speed.
  • characterization values obtained by the base station by measurement regarding the received signal quality of the UE to the serving cell and/or the neighboring cell For example, the SIR value, the RSCP value, and the best cell of the UE to the serving cell and/or the neighboring cell measured by the base station.
  • the NodeB can also report with the data frame on the DCH channel. Specifically, it can add a 16-bit field to the data frame on the DCH channel to indicate the Doppler shift value of the UE.
  • Step 204 The RNC receives the measurement report, and determines, according to the reported moving speed of the UE and the Doppler frequency shift value, that the UE performs handover.
  • the accuracy of the handover decision is improved according to the moving speed of the UE. It has been explained in the first embodiment.
  • the RNC can perform a more accurate handover decision. Since the Doppler shift value is gradually increased when the UE is far away from the base station; and as the distance increases, the rate at which the Doppler shift value increases gradually increases.
  • the base station is located at the center of the cell, and the distance from the base station means that it is close to the edge of the cell. Therefore, the RNC can improve the probability of the UE performing the handover according to the increasing rate of the UE Doppler shift value.
  • the RNC's acquisition of the UE's moving speed can be used for other purposes besides switching.
  • the RNC calculates the moving distance of the UE during the period by multiplying the moving speed of the reported UE by the time T of the reporting interval, and accumulating the moving distance during each reporting period to locate the current location of the UE.
  • Used for services such as location services.
  • the RNC may select a network for the UE according to the moving speed of the UE, and the UE with a large moving speed is selected in the macro cell with a large coverage radius, and the UE with a small moving speed is selected for the coverage. In a small area with a small radius.
  • the present invention further provides a system for reporting a measurement result, where the NodeB in the system includes a measurement module and a reporting module; and the measurement module is used in the covered cell.
  • the measurement speed of the user terminal UE is measured; the measurement module further includes: a speed measurement module for measuring a moving speed of the UE; and an optional received signal quality measurement module for measuring a characterization value of the received signal quality by the UE
  • a Doppler shift measurement module for measuring a Doppler shift of the UE; correspondingly, the measurement report reported by the upper 4 ⁇ module includes a unique identifier of the UE, a moving speed of the UE, and an optional The characterization of the received signal quality by the UE and the optional Doppler shift of the UE.
  • the reporting module is configured to report the measurement result of the UE moving speed measured by the measurement module to the RNC in the form of a measurement report.
  • the manner in which the reporting module reports the measurement report is notified to the NodeB by the RNC through the measurement initial message, where the reporting module includes a periodic reporting module, a triggering module,
  • the command reports at least one of the modules.
  • the present invention also proposes a cell handover method.
  • the NodeB measures the moving speed of the UE and reports it to the RNC.
  • the RNC performs the handover decision on the UE according to the measurement result reported by the NodeB.
  • the NodeB further measures the characterization value of the received signal quality of the UE and the Doppler frequency of the UE; the RNC according to the moving speed of the UE and the characterization value of the UE to the received signal quality and/or the UE
  • the Doppler shift performs a handover decision for the UE.
  • the present invention also proposes a cell handover system.

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Abstract

本发明涉及第三代移动通信技术应用在用户终端快速运动场景下的一种测量结果上报的方法及基于所述测量结果上报方法的小区切换方法及系统。用于解决用户终端在快速移动场景下不能实现准确切换的技术问题。基站测量所覆盖小区内UE的移动速度并通过测量报告上报给RNC，RNC根据上报的用户终端的移动速度判决该用户终端是否向新的小区切换。通过本发明可使小区切换更及时和准确。

Description

一种测量结果上报及小区切换的方法及系统 技术领域
本发明涉及移动通信领域， 尤其是涉及第三代移动通信技术应用在用 户终端快速运动场景下 （比如在高速铁路、 高速公路场景） 的小区测量结 果的上报及利用所述包含用户终端移动速度的测量报告来实现小区切换的 方法及系统。 背景技术
个人移动通信的发展极大地丰富了人们的生活， 使得人们在任何地点、 任何时间、 任何条件下都能方便地享受语音或数据的通讯服务。 而在实现 这一目标的背后是用户终端能够在移动蜂窝网络的小区间自由地实现越区 切换和跨本地网的漫游功能。 以第三代移动通信系统为例， 其无线接入网 络由众多蜂窝形状小区组成， 每个小区被该小区上的基站（NodeB )发射无 线电信号所覆盖， 若干个小区内的用户终端（UE ) 以及 NodeB由一个无线 网络控制器 （RNC )进行控制和管理。 越区切换往往发生在两个小区间的 重叠区域， 由于 UE的移动， UE逐渐从原有的小区切换到另一个新的小区； 或者对于分层网络， UE从一个层级的小区切换到更高或者更低层级的小 区。
现有技术中， 切换的实现往往是基于 UE 的接收信号质量来进行判断 的。 具体来说， UE不断测量其所在的小区 （称为服务小区）以及众多与服 务小区相邻的小区 （称为相邻小区） 的接收信号的质量或强度， 如果发现 服务小区的信号质量过低， 或者某个相邻小区的信号质量好于服务小区， 那么 UE把测量结果上报给 RNC, RNC根据收到的测量结果来判决切换。
申请号为 200510089131.2的中国专利申请公开了另一种基于用户终端 移动速度的切换方法，其特征是由 UE来测量自身的移动速度， 当发现自身 速度超过某个门限值时（这个门限值是预先设定好的）， UE向网络侧上报， RNC在收到报告后， 判决 UE在不同层级小区间切换。
综上所述， 可见实现准确及时切换的关键是准确的测量和及时的测量 上报。上面描述的两个现有技术在支持高速铁路、 高速公路等 UE在高速运 动的场景下都存在着问题。 采用传统的测量信号质量、 上报测量结果、 判 决切换的方式时， 由于 UE处在高速运动状态下，其实际的无线环境变化剧 烈， 往往当其测量到信号质量下降后， 到其上报给 RNC, 再由 RNC判决切 换， 在这段时间内 UE早已移出了原来的服务小区。 这样 UE就丟失了无线 覆盖， 切换不及时造成了掉话。
采用申请号为 200510089131.2的专利申请的技术方案提高了切换的及 时性， 但该方法在实际应用中由于受到 UE的处理能力、 功耗限制， 由 UE 测量出的速度结果往往带有很大的误差。 另一方面， 测量速度和上报速度 信息要求 UE增加功能， 而目前市场上的用户终端种类繁多，生产厂商成千 上万， 4艮难想象让如此多的 UE统一地增加实现上述新功能。该专利还存在 的一个问题是，其所公开的方法的应用场景仅适用于 UE向不同层级的小区 进行切换。 发明内容
有鉴于此， 为实现准确和及时的切换， 其关键是进行准确的测量和及 时的测量上报， 本发明的目的之一在于提供一种测量结果上报的方法及系 统， 用于解决 RNC实现准确、 及时切换时缺少判决切换的必要信息的技术 问题。 为实现上述目的， 本发明的技术方案是这样实现的：
一种测量结果上报的方法， 包括步骤：
无线网络控制器 （ RNC ) 向基站 （ NodeB )发送测量初始消息， 命令 NodeB对 UE的移动速度进行测量并上 4艮测量结果； 基站（NodeB )对用户终端 （UE ) 的移动速度进行测量；
NodeB通过发送包含测量结果的测量报告将 UE的移动速度上报无线 网络控制器。
进一步地， NodeB测量其所覆盖的小区内处于连接状态的 UE的移动 速度；或由 RNC指定 NodeB对哪个或哪些 UE进行移动速度的测量， NodeB 测量所述指定 UE的移动速度。
进一步地， NodeB除测量所述 UE的移动速度外， 还测量 UE对接收信 号质量的表征值， 和 /或 UE的多普勒频移。 所述 UE对接收信号质量的表 征值是指 UE对接收信号的信干比（SIR )和 /或接收信号功率（RSCP )值。
进一步地， 所述 NodeB 向 RNC 发送其所测得的 UE 的移动速度为 NodeB测得 UE的移动速度值或 UE的移动速度的等级值。
进一步地，在所述测量初始消息中携带 RNC指定 NodeB上报测量报告 的方式， 所述测量报告的上报方式为周期上报方式、 触发上报方式、 RNC 命令方式中的至少一种；
周期上报方式为，上报周期 T由 RNC给定， NodeB以 T为周期向 RNC 发送其对覆盖小区内的所有 UE的移动速度的测量报告；
触发上报方式为， 速度门限值 Th由 RNC给定， 当 NodeB测量到 UE 的移动速度达到门限值 Th时， NodeB向 RNC上报该 UE的测量报告；
RNC命令方式为， 由 RNC向 NodeB发送上报命令来要求 NodeB向其 上报某个 UE的移动速度的测量结果。
进一步地， 所述测量 ^艮告中除了包括 NodeB所测量获得的 UE的移动 速度， 还包括 UE的唯一标识， 此外， 还可包括 NodeB所测量获得的 UE 对接收信号质量的表征值， 和 /或 NodeB所测量获得的 UE的多普勒频移。
进一步地， NodeB 在向 RNC 发送测量 ·^艮告的同时还通过专用信道 ( DCH ) 向 RNC上报所述 UE的多普勒频移。 基于上述测量结果上报方法， 本发明还提出一种测量结果上报的系统， 包括基站 （ NodeB )、 无线网络控制器 （RNC ), 其特征在于， 所述 NodeB 包括测量模块和上报模块；
测量模块， 用于对所覆盖小区内的用户终端 UE的移动速度进行测量； 上报模块，用于将测量模块测得的 UE移动速度的测量结果通过测量报 告的形式上报给 RNC。
进一步地， 所述测量模块包括：
速度测量模块， 用于对 UE的移动速度进行测量；
可选的接收信号质量测量模块， 用于测量 UE对接收信号质量的表征 值；
可选的多普勒频移测量模块， 用于测量 UE的多普勒频移；
进一步地， 所述上报模块上报的测量报告中包括 UE的唯一标识、 UE 的移动速度、可选的 UE对接收信号质量的表征值以及可选的 UE的多普勒 频移。
进一步地， 所述测量模块测量其所覆盖的小区内处于连接状态的 UE 的移动速度； 或测量由 RNC指定的 UE的移动速度。
进一步地， 所述上报模块上报的 UE 的移动速度为测量模块直接测得 UE的移动速度值或 UE的移动速度的等级值。
进一步地，所述 UE对接收信号质量的表征值是指 UE对当前服务小区 的接收信号的信干比和 /或接收信号功率值。
进一步地， 所述上报模块上报测量报告的方式由 RNC通过测量初始消 息通知给 NodeB , 所述上报模块包括周期上报模块、 触发上报模块、 命令 上报模块中的至少一个：
周期上报模块， 用于根据 RNC给定的上报周期 T, 周期性向 RNC上 报包含测量模块测得的测量结果的测量报告； 触发上报模块， 用于根据 RNC给定的速度门限值 Th判断 UE的移动 速度是否达到门限值 Th, 若达到则向 RNC上报包含测量模块测得的测量 结果的测量报告， 否则不上报；
命令上报模块， 用于根据 RNC下发的上报命令向 RNC上报针对某个 UE的包含测量结果的测量报告。
本发明另一目的在于， 基于上述小区测量结果上报的方法， 提出一种 能够实现准确、 及时切换的小区切换方法及系统， 为实现上述目的， 本发 明的技术方案是这样实现的：
一种小区切换方法， 包括步骤：
步骤 A、 基站（NodeB )对用户终端 （UE ) 的移动速度进行测量并上 报给无线网络控制器（ RNC );
步骤 B、 RNC依据 NodeB上报的测量结果执行对 UE的切换判决。 进一步地， 步骤 A中， NodeB还测量和上报 UE对接收信号质量的表 征值； 步骤 B中， RNC依据 UE的移动速度及 UE对接收信号质量的表征 值执行对 UE的切换判决。
进一步地， 步骤 A中， NodeB还测量和上报 UE的多普勒频移； 步骤 B中， RNC依据 UE的移动速度及 UE的多普勒频移执行对 UE的切换判决。
基于上述方法， 本发明还提出一种小区切换系统， 包括：
设置在基站 （NodeB ) 中用于对用户终端 （UE ) 的移动速度进行测量 并上报给无线网络控制器（RNC ) 的测量模块；
设置在 RNC中用于依据 NodeB上报的测量结果执行对 UE的切换判决 的判决模块。
本发明技术方案中， 根据用户终端的移动速度来实现小区切换， 使得 切换变得更及时和准确。 与现有技术相比， 由 NodeB测量 UE的移动速度 准确度更高， 同时 NodeB测量减轻了用户终端的处理负荷， 不需要在 UE 上做任何改动。 同时需要指出， 本发明中小区切换的应用场景是任意相邻 小区间的切换， 而不局限于在不同层级间的小区切换。 附图说明
图 1为本发明实施例 1的流程图；
图 2为本发明实施例 2的流程图。 具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。
实施例 1
当 UE处在高速运动的场景下， 比如在高速铁路， 高速公路上运动时， 它往往会快速地通过一个小区。如果根据现有技术，先由 UE测量当前小区 和相邻小区的信号强度， 然后在发现当前小区的信号强度低于一定值后， 再向 RNC发送测量报告请求切换， 那么可能在 RNC还没来得及完成判决 切换之前， UE就已经移出了原服务小区， 从而导致切换失败和掉话。 另一 方面，基站可以有多种方法来实时地对 UE的移动速度进行测量，利用这一 信息来实现 UE的越区切换可以提高切换的及时和准确性。
图 1为本发明提出的一种 NodeB测量 UE的移动速度， 并将之上报给 RNC, 由 RNC利用该信息来判决切换的流程。
步骤 101 , RNC通过向 NodeB下发一条测量初始消息， 命令 NodeB对 UE的移动速度进行测量并将测量结果向其报告。
优选地， NodeB向 RNC上报对 UE的移动速度的测量结果是通过将测 量结果放在测量报告中上报给 RNC。
所谓测量初始消息是一条由 RNC下发给 NodeB的、 要求 NodeB对某 些测量量进行测量、 并给出上报测量结果规则的控制消息， RNC可以随时 地向 NodeB下发测量初始消息。本发明中，在 RNC向基站下发的测量初始 消息中增加要求 NodeB测量 UE的移动速度以及要求 NodeB向其上 4艮 UE 移动速度的测量结果的指示信息。 并且在之后的测量和测量上报过程中， RNC可以再次向 NodeB发送新的测量初始消息来停止或重启 NodeB对 UE 移动速度的测量以及改变 NodeB的上 4艮方式。
优选地， NodeB向 RNC上报 UE移动速度的测量结果时可以采用以下 三种方式的一种或者几种的组合：
方式一： 周期性上报方式
在测量初始消息中， RNC给出了一个时间周期 T , NodeB收到测量初 始消息后， 以 T为周期向 RNC发送所有其所测量的 UE的移动速度的测量 报告， 测量报告中包含对该 UE移动速度的测量结果；
方式二： 触发上报方式
在测量初始消息中， RNC给出了一个速度的门限值 Th, 当 NodeB测 量到某个 UE的移动速度达到门限值 Th时， NodeB向 RNC上报该 UE的 速度测量报告 (测量报告中包含对该 UE移动速度的测量结果）。
方式三： RNC命令上报方式，
RNC随时地通过命令来要求 NodeB向其上报某个 UE的移动速度的测 量结果。
步骤 102, 基站实时地测量它所覆盖的小区内 UE的移动速度； 优选地， NodeB测量其所覆盖小区内的所有的处在连接状态的 UE的 移动速度。 所谓 UE处在连接状态， 是指 UE处在 CELL-DCH (专用信道， Dedicated Channel )状态或者 CELL-FACH (前向接入信道， Forward Access Channel )状态， 也就是说 UE在上述的两个信道上和 NodeB之间有连接。
该步骤中，也可以由 RNC来指定 NodeB对哪个或哪些 UE进行移动速 度的测量。
本发明优选的基站测量 UE的移动速度的方法如下： 首先基站测量 UE 的多普勒频移， 同时基站还测量来自 UE信号到达基站天线的到达角， 然后 根据下述多普勒频移公式反推出 UE的移动速度：
f, =—cose
J d C 这里 V即是 UE的移动速度， 表示 UE的多普勒频移值， c是光速（等 于 3*108m/s ) , 表示 UE信号到达基站天线的到达角。
步骤 103 , 如果在步骤 101中， RNC在测量控制消息中规定 NodeB向 其上报 UE移动速度的测量报告的方式是触发上报， 那么 NodeB判断 UE 的移动速度， 若某个 UE的移动速度达到所设定的速度门限值 Th, 则执行 步骤 104; 否则执行步骤 102;
如果在步骤 101中， RNC在测量控制消息中规定 NodeB向其上报 UE 移动速度的测量报告的方式是周期上报， 那么 NodeB每隔时间周期 T执行 步骤 104, 并在步骤 104中向 RNC上 4艮小区内所有其所测量的 UE的测量 报告。
在图 1仅画出了 RNC在测量控制消息中规定 NodeB向其上报 UE移动 速度的测量报告的方式是触发上报这种情况下的步骤流程。
步骤 104, 基站向 RNC上报测量得到的移动速度达到所设定的速度门 限值的 UE的测量报告；
所述 UE的测量报告中包括：
( 1 )唯一标识该 UE的标识号， 标识号可以是这个 UE所占的无线链 路号 RL-id , 或者对于 CELL-DCH状态的 UE可以是其所占的 DCH信道号 DCH-id。
NodeB在和 UE间建立无线链路时， 会为每个无线链路分配一个唯一 的无线链路号 RL-id , 因此该无线链路号可以唯一地表示该无线链路所对应 的 UE。
( 2 ) NodeB测得的该 UE的速度值， 作为 RNC判决切换的参考条件。 NodeB向 RNC上报其所测量获得的 UE的移动速度， 可以直接上报这 个速度值。 比如测量到的 UE移动速度为 30m/s,那么 NodeB即上 4艮这个值 ( 30m/s )„ 或者 NodeB可以上报 UE移动速度的等级值， 等级值是由 RNC 和 NodeB预先约定的。 比如 0-30 m/s的速度预定义为等级 A, 30-50 m/s的 速度预定义为等级 B , 50 m/s以上的速度预定义为等级 C, 当 NodeB测得 某个 UE的移动速度为 70m/s, 那么它向 RNC上报该 UE的速度为等级 C。
测量 4艮告中还可以优选地包括：
( 3 )基站通过测量获得的其它有关该 UE对接收信号质量的表征值。 比如基站测到的该 UE 对所述服务小区的信干比 （ Signal-to-Interference
Ratio, SIR )值， 接收信号功率 （ Received Signal Code Power, RSCP )值， 以及最佳小区等。
步骤 105 , RNC收到测量报告， 执行对 UE的切换判决。
RNC收到基站上报的 UE速度测量报告后， 判决该 UE是否向新的小 区切换。
所述新的小区是指 UE所在当前服务小区的相邻列表中任意一个小区。 相邻小区列表保存在 RNC内部， 它包括了和一个小区在地理上相邻的若干 小区， 对于分层网络还包括了和一个小区覆盖同样地理区域， 但处在不同 层级的小区。 在实际的高速铁路、 高速公路的无线网络中， 分层网络是更 常见的情况， 公网的小区覆盖普通的沿线附近的 UE, 专网小区覆盖车厢内 高速运动着的 UE。 RNC在收到基站的 UE速度测量报告后， 如果判决该 UE执行小区切换那么还要指明 UE向哪个小区进行切换。
RNC收到的测量报告后依据 NodeB所测得的 UE移动速度来判决切换 有多种实现方式。 比如对于 NodeB周期地上报 UE移动速度的方式， RNC 可以用上报周期 T乘以 UE的移动速度来计算出该 UE在该周期内运行的距 离， 然后累积每个时间周期的该 UE的运行距离； 当累积的距离已经达到了 该 UE所在服务小区的边界， 那么判决切换。 或者， 比如对于 NodeB触发 上报 UE移动速度的方式， RNC可以结合收到的 UE对服务小区的 SIR值 来判决切换： 当 RNC收到上报的 UE移动速度的测量报告时 （说明该 UE 的移动速度大于门限值）， UE对服务小区的 SIR值只要低于一个较高的门 限值 SIRhlgh, RNC即判决切换； 当 RNC没有收到上报的 UE移动速度的测 量报告时 （说明该 UE的移动速度较低）， UE对服务小区的 SIR值要低于 一个较低的门限值 SIRiow, RNC判决切换。
实施例 2
为进一步提高 RNC判决 UE切换的准确和及时性，在本实施例中 NodeB 增加了上报 UE多普勒频移的测量信息。 UE的多普勒频移是由于 UE在运 动中的多普勒效应所产生的频率偏移。 RNC在综合了 UE的移动速度和多 普勒频移后， 有利于做出更准确的切换判决。
以下是实施例 2的具体步骤流程， 与实施例 1相同的部分从略。
步骤 201 , RNC通过向 NodeB下发一条测量初始消息， 命令 NodeB对 UE的移动速度进行测量并将测量结果通过测量报告向其报告。
与实施例一中相同， RNC要求 NodeB向其上报 UE移动速度的测量结 果地有两种上报方式， 即周期性上报和触发上报。 下面以周期性上报方式 来继续流程描述， 在测量初始消息中 RNC给出了上报周期 T。
本实施例中， RNC在要求 NodeB上报 UE的移动速度之外还要求 NodeB 上报 UE的多普勒频移。
RNC可以通过测量初始消息来要求 NodeB上报 UE的多普勒频移， 也 可以通过其它方式来要求上 4艮， 比如通过 RACH ( Random Access Channel, 随机接入信道）信道上的测量控制消息来指示 NodeB。
步骤 202, NodeB实时地测量它所覆盖的小区内 UE的移动速度和多普 勒频移。 UE和 NodeB之间在建立无线链路时， 会约定一个相互发送信号的频 率， UE以这个频率向 NodeB发送信号，但由于 UE运动中产生的多普勒频 移影响， 导致了 NodeB接收到的来自 UE的信号频率与约定的频率间存在 偏差。 NodeB通过测量可以获得这个偏差值， 并进一步估计出 UE的多普 勒频移值。
NodeB测量 UE移动速度的方法可与实施例 1中相同。
步骤 203 , NodeB以时间周期 T向 RNC上报包含 UE移动速度的测量 报告。
另夕卜， NodeB还向 RNC上报该 UE的多普勒频移。 NodeB向 RNC上 艮该 UE 的多普勒频移可以同样通过测量 4艮告来上 ·^艮， 也可以通过 DCH ( Dedicated Channel, 专有信道）信道的数据帧来上报。
与实施例一相同， 所述 NodeB向 RNC上 4艮的测量 4艮告里包括： ( 1 )唯一标示该 UE的标识号；
( 2 ) NodeB 测得的该 UE 的速度值。 NodeB 可以直接上 4艮其所测的 UE的移动速度的具体值， 也可以上报这个移动速度的等级值。
还可以包括
( 3 )该 UE的多普勒频移值；
( 4 )基站通过测量获得的其它有关该 UE对服务小区和 /或相邻小区的 接收信号质量的表征值。 比如基站测到的该 UE对所述服务小区和 /或相邻 小区的 SIR值， RSCP值， 以及最佳小区等。
如果 NodeB没有通过测量 4艮告来上 4艮 UE的多普勒频移， 那么 NodeB 还可以同 DCH信道上的数据帧来上报。 具体地说， 它可以在 DCH信道上 的数据帧中增加一个 16bit的字段来表示该 UE的多普勒频移值。
步骤 204, RNC收到测量报告，依据上报的 UE的移动速度和多普勒频 移值来判决该 UE进行切换。 依据 UE 的移动速度来提高切换判决的准确性已经在实施例一中进行 了说明， 辅助了 UE的多普勒频移值的信息后， RNC可以进行更准确的切 换判决。 由于当 UE远离基站时， 其多普勒频移值是逐渐增大的； 并且随着 距离的增大， 多普勒频移值增大的速率也逐渐的增大。 而基站位于小区中 心， 远离基站也就意味着接近小区的边缘， 因此 RNC可以根据 UE多普勒 频移值的增大速率来提高判决 UE执行切换的概率。
另外还需要说明， RNC获得 UE的移动速度除了用于切换之外， 还可 以有其他用途。比如， RNC用上报的 UE的移动速度乘以上报间隔的时间 T 计算出该 UE在这段时间内的运动距离， 累积每次上报期间的移动距离，就 能定位 UE目前所处的位置， 辅助用于位置服务等业务。 又比如， 在分层网 络中， RNC可以根据 UE的移动速度大小来为该 UE进行选网， 移动速度 大的 UE被选在覆盖半径大的宏小区中，移动速度小的 UE被选在覆盖半径 小的微小区中。
实施例 3
基于本发明提出的用于切换的测量结果上报的方法， 本发明还提出一 种测量结果上报的系统， 该系统中的 NodeB中包含测量模块、 上报模块； 测量模块用于对所覆盖小区内的用户终端 UE的移动速度进行测量；所 述测量模块进一步包括： 用于对 UE的移动速度进行测量的速度测量模块； 可选的用于测量 UE对接收信号质量的表征值的接收信号质量测量模块；可 选的用于测量 UE的多普勒频移的多普勒频移测量模块；相应地，所述上 4艮 模块上报的测量报告中包括 UE的唯一标识、 UE的移动速度、 可选的 UE 对接收信号质量的表征值以及可选的 UE的多普勒频移。
上报模块用于将测量模块测得的 UE移动速度的测量结果通过测量报 告的形式上报给 RNC。所述上报模块上报测量报告的方式由 RNC通过测量 初始消息通知给 NodeB, 所述上报模块包括周期上报模块、 触发上 模块、 命令上报模块中的至少一个。
实施例 4
基于本发明提出的测量结果上报的方法， 本发明还提出一种小区切换 方法。 该方法中： NodeB对 UE的移动速度进行测量并上报给 RNC; RNC 依据 NodeB上报的测量结果执行对 UE的切换判决。
可选地，所述 NodeB还测量和上 4艮 UE对接收信号质量的表征值及 UE 的多普勒频移； RNC依据 UE的移动速度及 UE对接收信号质量的表征值 和 /或 UE的多普勒频移执行对 UE的切换判决。
基于上述本发明提出的小区切换方法， 本发明还提出一种小区切换系 统。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种测量结果上报的方法， 其特征在于， 包括：
无线网络控制器 （ RNC ) 向基站 （ NodeB )发送测量初始消息， 指令 NodeB对 UE的移动速度进行测量并上 4艮测量结果；
NodeB对用户终端 （UE ) 的移动速度进行测量；
NodeB通过发送包含测量结果的测量报告将 UE的移动速度上报无线 网络控制器。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 NodeB对 UE的移 动速度进行测量具体为： NodeB 对自身所覆盖小区内处于连接状态的 UE 的移动速度进行测量。
3、根据权利要求 1所述的方法， 其特征在于， RNC发送所述测量初始 消息指令 NodeB对 UE的移动速度进行测量时， 指定 NodeB对哪个或哪些 UE进行移动速度的测量， NodeB对指定的 UE的移动速度进行测量。
4、 根据权利要求 1所述的方法， 其特征在于， 所述 NodeB对 UE的移 动速度进行测量时， 还测量 UE对接收信号质量的表征值， 和 /或 UE的多 普勒频移。
5、 根据权利要求 4所述的方法， 其特征在于， 所述测量报告中除包括 UE的唯一标识、 UE的移动速度外， 还包括 UE对接收信号质量的表征值、 和 /或 UE的多普勒频移。
6、 根据权利要求 4所述的方法， 其特征在于， NodeB在向 RNC发送 测量报告的同时， 还通过专用信道（DCH )向 RNC上报所述 UE的多普勒 频移。
7、 根据权利要求 4、 5或 6所述的方法， 其特征在于， 所述 UE对接收 信号质量的表征值为： UE对接收信号的信干比 （SIR )和 /或接收信号功率
( RSCP )值。
8、 根据权利要求 1所述的方法， 其特征在于， 所述 NodeB向 RNC发 送自身所测得的 UE的移动速度为： NodeB测得的 UE的移动速度值或 UE 的移动速度的等级值。
9、 根据权利要求 1所述的方法， 其特征在于， 在所述测量初始消息中 携带 RNC指定 NodeB上报测量报告的方式；
所述测量报告的上报方式为周期上报方式、 触发上报方式、 RNC命令 方式中的至少一种；
所述周期上 ·^艮方式为： 上 ·^艮周期 T由 RNC给定， NodeB以 T为周期向 RNC发送其对覆盖小区内的所有 UE的移动速度的测量报告；
所述触发上报方式为： 速度门限值 Th由 RNC给定， 当 NodeB测量到 UE的移动速度达到门限值 Th时， NodeB向 RNC上报该 UE的测量报告； 所述 RNC命令方式为： 由 RNC向 NodeB发送上 4艮命令来要求 NodeB 向其上报某个 UE的移动速度的测量结果。
10、 一种测量结果上 ·^艮的系统， 包括 NodeB、 RNC, 其特征在于， 所 述 NodeB包括测量模块和上报模块；
测量模块， 用于对所覆盖小区内的用户终端 UE的移动速度进行测量； 上报模块，用于将测量模块测得的 UE移动速度的测量结果通过测量报 告的形式上报给 RNC。
11、 根据权利要求 10所述的系统， 其特征在于， 所述测量模块包括： 速度测量模块， 用于对 UE的移动速度进行测量；
接收信号质量测量模块， 用于测量 UE对接收信号质量的表征值； 多普勒频移测量模块， 用于测量 UE的多普勒频移。
12、 根据权利要求 11所述的系统， 其特征在于， 所述上报模块上报的 测量报告中包括 UE的唯一标识、 UE的移动速度、 UE对接收信号质量的 表征值、 以及 UE的多普勒频移。
13、 根据权利要求 10所述的系统， 其特征在于， 所述测量模块， 测量 自身所覆盖小区内处于连接状态的 UE的移动速度， 或测量由 RNC指定的 UE的移动速度。
14、 根据权利要求 10所述的系统， 其特征在于， 所述上报模块， 上报 的 UE的移动速度为测量模块直接测得 UE的移动速度值或 UE的移动速度 的等级值。
15、 根据权利要求 12所述的系统， 其特征在于， 所述 UE对接收信号 质量的表征值为： UE对当前服务小区的接收信号的信干比和 /或接收信号功 率值。
16、 根据权利要求 10所述的系统， 其特征在于， 所述上报模块， 上报 测量 4艮告的方式由 RNC通过测量初始消息通知给 NodeB;
所述上报模块包括周期上报模块、 触发上报模块、 命令上报模块中的 至少一个：
所述周期上报模块， 用于根据 RNC给定的上报周期 T, 周期性向 RNC 上报包含测量模块测得的测量结果的测量报告；
所述触发上报模块， 用于根据 RNC给定的速度门限值 Th判断 UE的 移动速度是否达到门限值 Th, 若达到则向 RNC上报包含测量模块测得的 测量结果的测量报告， 否则不上报；
所述命令上报模块， 用于根据 RNC下发的上报命令向 RNC上报针对 某个 UE的包含测量结果的测量报告。
17、 一种小区切换方法， 其特征在于， 包括步骤：
A、 NodeB对 UE的移动速度进行测量并上 4艮给 RNC;
B、 RNC依据 NodeB上报的测量结果执行对 UE的切换判决。
18、 根据权利要求 17所述的方法， 其特征在于，
步骤 A中， NodeB还测量和上报 UE对接收信号质量的表征值； 步骤 B中， RNC依据 UE的移动速度及 UE对接收信号质量的表征值 执行对 UE的切换判决。
19、 根据权利要求 17或 18所述的方法， 其特征在于，
步骤 A中， NodeB还测量和上 4艮 UE的多普勒频移；
步骤 B中， RNC依据 UE的移动速度及 UE的多普勒频移执行对 UE 的切换判决。
20、 一种小区切换系统， 其特征在于， 包括：
设置在 NodeB中用于对 UE的移动速度进行测量并上报给 RNC的测量 模块；
设置在 RNC中用于依据 NodeB上报的测量结果执行对 UE的切换判决 的判决模块。
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