WO2013071787A1 - 一种提高移动健壮性的方法、系统和设备 - Google Patents

一种提高移动健壮性的方法、系统和设备 Download PDF

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Publication number
WO2013071787A1
WO2013071787A1 PCT/CN2012/080733 CN2012080733W WO2013071787A1 WO 2013071787 A1 WO2013071787 A1 WO 2013071787A1 CN 2012080733 W CN2012080733 W CN 2012080733W WO 2013071787 A1 WO2013071787 A1 WO 2013071787A1
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Prior art keywords
cell
network side
side device
signal shield
value
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PCT/CN2012/080733
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English (en)
French (fr)
Inventor
刘爱娟
王彦
鲍炜
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电信科学技术研究院
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Publication of WO2013071787A1 publication Critical patent/WO2013071787A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/045Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, system and device for improving mobile robustness. Background technique
  • Evolved Universal Terrestrial Radio Access Evolved Universal Terrestrial Radio Access
  • SON Self Organizing Networks
  • 3GPP 3rd Generation Partnership
  • the SON self-optimization function needs to monitor some network and system performance parameters as input, such as network performance indicator statistics, fault alarms, notifications, etc. After analyzing the input data, the optimization algorithm makes a decision, and finally automatically triggers the adjustment of the relevant network node. operating.
  • Mobility Robustness Optimization is the first thing to do to accurately determine the root cause of a problem.
  • the user equipment quickly fails to connect after switching to the target cell, and then the UE reestablishes the connection in the source cell.
  • the criteria for judging handover to the wrong cell are as follows:
  • the UE fails to connect during the handover process or after the handover is completed (whether in the source cell or the target cell), and then the UE reestablishes the connection in a third-party cell (neither the source cell nor the target cell).
  • This low-power base station is an application in a home indoor environment, an office environment, or other hotspots.
  • the base station equipment enables operators to offer higher data rates, lower cost and attractive services.
  • an Almost Blank Subframe (ABS) is introduced, which is configured on the side of the interference base station, and is usually applied to the networking of the Macro (base) base station and the Pico base station.
  • ABS subframe is generally set by the Macro base station, and the offset (Bias) between the Macro base station and the Pico base station is set. This expands the coverage of the Pico base station.
  • the solid line is the original coverage of the Pico base station
  • the dotted line is the coverage range after the Macro base station configures the ABS and Bias for the Pico 1 cell and the Pico2 cell.
  • the Macro base station configures the Bias of the Picol cell and the Pico2 cell for the UE in the connected state through Radio Resource Control (RRC) signaling, and thus is only applicable to the switching of the connected state.
  • RRC Radio Resource Control
  • a connection failure occurs after the UE switches from the Macro base station to the Picol cell, and then the UE performs RRC connection reestablishment.
  • the cell is a Macro base station. According to the existing mobile robustness mechanism, the cause of the problem is diagnosed as being too early.
  • the method, the system and the device for improving the robustness of the mobile device provided by the embodiments of the present invention are used to improve the accuracy of the mobile robustness in the networking environment of the Macro base station and the Pico base station in the Hetnet scene.
  • the first network side device After receiving the indication message for the user equipment in the cell that the connection fails, the first network side device determines the cell with the wrong cell parameter setting;
  • the second network side device receives the wireless signal shield parameter value of the cell from the first network side device, where the wireless signal shield parameter value is finally obtained by the user equipment before the connection failure occurs;
  • the second network side device is located in the cell wireless signal shield parameter value, and determines a decision signal shield value of the corresponding cell; The second network side device determines, according to the decision signal shield value of the cell, the cause of the connection failure.
  • the first network side device is a network side device that is accessed when the user equipment fails to connect.
  • a cell determining module configured to: after receiving an indication message for a user equipment that fails to connect in the cell, determine a cell with a wrong cell parameter setting;
  • a sending module configured to send, to the second network side device to which the determined cell belongs, a wireless signal shield parameter value of the cell that is finally obtained by the user equipment before the connection failure occurs.
  • a receiving module configured to receive a wireless signal shield parameter value of the cell from the first network side device, where the wireless signal shield parameter value is finally obtained by the user equipment before the connection failure occurs;
  • a shield magnitude determining module configured to determine, according to the wireless signal shield parameter value of the cell, a decision signal shield value of the corresponding cell
  • a decision module configured to determine, according to a decision signal value of the cell, a reason for the connection failure
  • the first network side device is a network side device that is accessed when the user equipment fails to connect.
  • a first network side device configured to: after receiving an indication message for a user equipment that fails to connect in the cell, determine a cell with a wrong cell parameter setting, and send the user equipment to the second network side device to which the determined cell belongs The value of the wireless signal shield parameter of the cell finally obtained before the connection failure occurs;
  • a second network side device configured to receive a wireless signal shield parameter value of the cell from the first network side device, and determine, according to the cell wireless signal shield parameter value, a decision signal shield value of the corresponding cell, according to the judgment of the cell
  • the value of the signal shield determines the cause of the connection failure.
  • FIG. 1 is a schematic diagram of a Hetnet scenario in the background art
  • FIG. 2 is a schematic structural diagram of a system for improving mobile robustness according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a network side device for transmitting a wireless signal shield parameter value according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a network side device for receiving a wireless signal shield parameter value according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for improving mobility robustness of a first network side device according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a method for improving mobility robustness of a second network side device according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for improving mobile robustness in scenario 1 according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a method for improving mobile robustness in scenario 2 according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of scenario 3 according to an embodiment of the present invention. detailed description
  • the first network side device of the embodiment of the present invention sends the wireless signal shield parameter value of the cell finally obtained by the user equipment before the connection failure occurs to the second network side device to which the cell with the wrong parameter setting is located;
  • the network side device determines the shield signal value of the decision signal of the corresponding cell according to the wireless signal shield parameter value of the cell, and determines the cause of the connection failure according to the decision signal shield value of the cell. Due to the multi-layer coverage in the Hetnet scenario, the accuracy of the mobile robustness in the networking environment of the Macro base station and the Pico base station is improved.
  • the wireless signal shield parameter value of the embodiment of the present invention includes, but is not limited to, at least one of the following parameter values: a reference signal received power (RSRP) value, and a reference signal received shield value.
  • RSRP reference signal received power
  • connection failure in the embodiment of the present invention indicates that the connection between the user equipment and the accessed cell is disconnected, and generally the radio link failure (RLF) and the handover failure (HOF) are also used.
  • RLF radio link failure
  • HAF handover failure
  • the system for improving mobile robustness in the embodiment of the present invention includes: a first network side device 10 and a second network side device 20.
  • the first network side device 10 is configured to: after receiving the indication message for the user equipment that fails to connect in the cell, determine the cell with the wrong cell parameter setting, and send the user equipment to the second network side device 20 to which the determined cell belongs. The value of the wireless signal shield parameter of the cell finally obtained before the connection failure occurs;
  • the second network side device 20 is configured to receive a wireless signal shield parameter value of the cell from the first network side device 10, and determine a decision signal shield value of the corresponding cell according to the cell wireless signal shield parameter value, according to the judgment of the cell The value of the signal shield determines the cause of the connection failure.
  • the indication message for the user equipment in which the connection failure occurs in the cell may be a radio link failure indication message.
  • the first network side device 10 may put the wireless signal shield parameter value of the cell that is finally obtained by the user equipment before the connection failure occurs in the interface signaling, and send the interface signaling to the second network side device. 20;
  • the second network side device 20 extracts, from the interface signaling, the wireless signal shield parameter value of the cell finally obtained by the user equipment before the connection failure occurs.
  • the interface signaling in the embodiment of the present invention includes but is not limited to one of the following messages:
  • the information reported to the network side includes the radio signal shield parameter value of the cell finally obtained before the connection failure occurs, and the cell information related to the connection failure is also included, so the first network The network side device 10 can transmit the connection failure related information to the second network side device 20.
  • a preferred method of processing is: the first network side device 10 directly forwards the information to the second network side device 20. That is, the first network side device 10 transmits the wireless signal shield parameter value of the cell finally obtained by the user equipment before the connection failure occurs, and the connection failure related information to the second network side device 20.
  • connection failure related information in the embodiment of the present invention includes, but is not limited to, at least one of the following information: a cell identifier of the serving cell when the connection fails, a cell identifier that the UE attempts to reestablish the connection after the connection fails, and an identifier of the UE in the serving cell. .
  • the wireless signal shield parameter value of the cell received by the second network side device 20 may include a plurality of small area wireless signal shield parameter values.
  • the second network side device uses the wireless signal shield parameter value of the cell as the decision signal shield value corresponding to the cell;
  • the second network side device determines the decision signal shield value corresponding to the cell according to the wireless signal shield parameter value of the cell and the offset (Bias) of the cell.
  • the decision signal shield value of the cell is equal to the sum of the wireless signal shield parameter value of the cell and the offset of the cell.
  • the offset is a network pre-configured cell signal power compensation value.
  • the second network side device 20 After determining the value of the decision signal shield of each cell, the second network side device 20 can judge the cause of the connection failure to see which reason is met.
  • the user equipment switches from A to B, according to the decision signal shield value of each cell, it is determined that the user equipment should perform RRC reconstruction in C, and the criteria for switching to the wrong cell are met, and the reason for the connection failure may be determined to be switched to the error. Community.
  • the user equipment After the user equipment switches from A to B, it is determined that the user equipment should perform RRC reestablishment in A according to the decision signal shield value of each cell, and the criterion for premature handover is met, and the reason for the connection failure may be determined to be premature handover.
  • a better processing method is: judging the shield value of each decision signal separately, if If the judgment result is consistent, it is determined that the judgment result is the cause of the connection failure; if the judgment result is inconsistent, the judgment result is discarded.
  • the wireless signal shield parameter value has RSRP and RSRQ
  • the RSRP is separately judged as the result of switching to the wrong cell
  • the RSRQ is separately judged as the result of switching to the wrong cell
  • the wireless signal shield quantity parameter in the embodiment of the present invention, it is not limited to the above processing side.
  • other embodiments in which the wireless signal shield parameter value can be judged are applicable to the embodiments of the present invention.
  • the network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.
  • a station such as a macro base station, a home base station, etc.
  • RN relay
  • the network side device in the system for improving mobile robustness and the method for improving mobile robustness are also provided in the embodiment of the present invention, and the principle of solving the problem by these devices and methods is similar to the system for improving mobile robustness. Therefore, the implementation of these devices and methods can be referred to the implementation of the system, and the repeated description will not be repeated.
  • the network side device that sends the wireless signal shield parameter value in the embodiment of the present invention includes: a cell determining module 300 and a sending module 310.
  • a cell determining module 300 configured to: after receiving an indication message for a user equipment that fails to connect in the cell, determine a cell with a wrong cell parameter setting;
  • the sending module 310 is configured to send, to the second network side device to which the cell determined by the cell determining module 300 belongs, a wireless signal shield parameter value of the cell finally obtained by the user equipment before the connection failure occurs.
  • the transmitting module 310 transmits the wireless signal shield parameter through the interface signaling.
  • the sending module 310 sends the connection failure related information to the second network side device.
  • the network side device that receives the wireless signal shield parameter value in the embodiment of the present invention includes: a receiving module 400, a quality value determining module 410, and a decision module 420.
  • the receiving module 400 is configured to receive a wireless signal shield parameter value of the cell from the first network side device, where the wireless signal shield parameter value is obtained last before the user equipment fails to connect;
  • the shield magnitude determining module 410 is configured to determine, according to the cell wireless signal shield parameter value of the receiving module 400, a decision signal shield value of the corresponding cell;
  • the determining module 420 is configured to determine, according to the decision signal shield value of the cell determined by the shield magnitude determining module 410, the cause of the connection failure;
  • the first network side device is a network side device that is accessed when the user equipment fails to connect.
  • the receiving module 400 receives an interface signal from the first network side device that includes a wireless signal shield parameter value.
  • the shield magnitude determining module 410 uses the wireless signal shield parameter value of the cell as the decision signal shield value corresponding to the cell;
  • the shield magnitude determining module 410 determines a decision signal shield value corresponding to the cell according to the wireless signal shield parameter value of the cell and the offset of the cell. .
  • the network side device that sends the wireless signal shield parameter value according to different application scenarios may also become the network side device that receives the wireless signal shield parameter value; correspondingly, the network side device that receives the wireless signal shield parameter value also It may become a network side device that transmits a wireless signal shield parameter value, so preferably, the module in the network side device that transmits the wireless signal shield parameter value in FIG. 3 and the network side in FIG. 4 that receives the wireless signal shield parameter value in FIG.
  • the module in the device is also It can be combined in one network side device, and select the corresponding module work as needed.
  • the method for improving mobility robustness of the first network side device in the embodiment of the present invention includes the following steps: Step 501: After receiving the indication message for the user equipment in the cell that fails to connect, the first network side device Determining a cell with incorrect cell parameter settings;
  • Step 502 The first network side device sends, to the second network side device to which the determined cell belongs, a wireless signal shield quantity parameter value of the cell finally obtained by the user equipment before the connection failure occurs.
  • the first network side device may put the value of the wireless signal shield parameter of the cell finally obtained by the user equipment before the connection failure occurs, and put the interface signaling message to the first Two network side devices.
  • the first network side device may send the connection failure related information to the second network side device.
  • the first network side device sends the wireless device shield parameter value of the cell finally obtained by the user equipment before the connection failure occurs, and the connection failure related information to the second network side device.
  • the method for improving mobility robustness of the second network side device includes the following steps: Step 601: The second network side device receives a wireless signal shield parameter value of a cell from the first network side device, The wireless signal shield parameter value is obtained last time before the user equipment fails to connect, and the first network side device is a network side device that is accessed when the user equipment fails to connect;
  • Step 602 The second network side device determines, according to the value of the cell wireless signal shield quantity parameter, a decision signal shield value of the corresponding cell.
  • Step 603 The second network side device determines, according to the value of the decision signal of the cell, the reason for the connection failure. Preferably, in step 601, the second network side device receives the interface signaling from the first network side device that includes the wireless signal shield parameter value.
  • the second network side device uses the wireless signal shield parameter value of the cell as the decision signal shield value corresponding to the cell.
  • the second network side device determines a decision signal corresponding to the cell according to the wireless signal shield parameter value of the cell and the offset of the cell. Shield magnitude.
  • step 603 after determining the value of the decision signal shield of each cell, the second network side device can determine the cause of the connection failure and see which reason is met.
  • the user equipment switches from A to B, according to the decision signal shield value of each cell, it is determined that the user equipment should perform RRC reconstruction in C, and the criteria for switching to the wrong cell are met, and the reason for the connection failure may be determined to be switched to the error. Community.
  • step 501 and step 502 are performed first, and then steps 601 to 603 are performed.
  • the first network side device and the second network side device may be the same type of network side device, for example, may be a Macro base station; or may be different types of network side devices, for example, one is a Macro base station, and the other is
  • the value of the radio signal shield parameter value of the cell is an RSRP value
  • the cell radio signal shield parameter value is other values and a cell.
  • the value of the wireless signal shield parameter is similar to the RSRP value, and will not be described here.
  • Pico 1 and Pico 2 are two low-power base stations under the coverage of the Macro Base Station.
  • Macro A (cell of Macro Base Station) sets 8dBm Bias for both Cell 1 under Pico 1 and Cell 2 under Pico 2.
  • the UE switches from the cell Cell A under Macro A to the cell Cell 1 under Pico 1;
  • the UE After the handover is completed, the UE fails to connect in Cell 1 of Pico 1;
  • the RSRP of the Macro A measured by the UE after the connection failure is -105 dBm
  • the RSRP of Cell 1 is -114 dBm
  • the RSRP of Cell 2 is -109 dBm;
  • the UE performs the RRC connection reestablishment in the Macro A. After the reestablishment succeeds, the UE reports the connection failure to the base station where the reestablished cell is located (ie, Macro A);
  • Macro A fails to connect to the base station that failed to connect after determining that it is not a coverage problem (ie,
  • the Pico 1 After receiving the radio link failure indication message, the Pico 1 determines the failure and the handover, and determines that the handover source, the area, and the reestablished cell are the same, and determines the cause of the connection failure.
  • the Pico 1 determines that the reason for the connection failure is 'switching too early' according to the RSRP of each neighboring cell measured by the UE after the connection failure, and determines the cell with the wrong cell parameter setting according to the result of the judgment;
  • the Pico 1 sends a HO (Handover) Report message to the base station (ie, Macro A) to which the cell with the wrong cell parameter setting is located, and the message carries the RSRP information finally obtained before the UE fails to connect.
  • HO Heandover
  • Macro A Based on the RSRP received and the Bias set by Macro A for Pico 1 and Pico 2, Macro A performs the exact premature handover and the decision to switch to the wrong cell. Specifically:
  • Scenario 2 Both Pico 1 and Pico 2 are two low-power base stations under Macro A coverage. In order to perform Range Extension on Pico, Macro A sets 8dBm BiaSo for Cell 1 under Pico 1 and Cell 2 under Pico 2
  • the method for improving mobile robustness in scenario 2 of the embodiment of the present invention includes:
  • the UE switches from the cell Cell A under Macro A to the cell Cell 1 under Pico 1;
  • the UE After the handover is completed, the UE fails to connect in Cell 1 of Pico 1;
  • the RSRP of Cell A measured by the UE after the connection failure is -105dBm
  • the RSRP of Cell 1 is -114dBm
  • the RSRP of CELL 2 is -109dBm;
  • the UE performs RRC connection reestablishment in Cell A, and the reconstruction fails.
  • Macro A sends a radio link failure indication message to Pico 1;
  • Pico 1 After receiving the message, Pico 1 determines that there is a second radio link failure indication message and discards the message.
  • the UE initiates an RRC connection setup in another cell Cell B in an Idle state. After the connection is successfully established, the UE reports the connection failure report to the base station B where the cell B is located.
  • the base station B sends a radio link failure indication message to the base station (ie, Picol) that failed to connect according to the connection failure report after determining that it is not a coverage problem;
  • Picol After receiving the radio link failure indication message, Picol determines the failure and the handover, and determines that the handover source cell and the reestablished cell are the same, and then determines the cause of the connection failure;
  • the Pico 1 determines that the reason for the connection failure is 'switching too early' according to the RSRP of each neighboring cell measured by the UE after the connection failure, and determines the cell with the wrong cell parameter setting according to the result of the judgment;
  • the Pico 1 sends a HO Report message to the base station (ie, Macro A) to which the cell with the wrong cell parameter setting is located, and the message carries the RSRP information finally obtained before the UE fails to connect.
  • the base station ie, Macro A
  • Macro A Based on the RSRP received and the Bias set by Macro A for Pico 1 and Pico 2, Macro A performs the exact premature handover and the decision to switch to the wrong cell. Specifically:
  • Pico 1 is at the junction of Macro A, Macro B, and Macro C.
  • Cell A, Cell B, and Cell C are cells under three Macro base stations, respectively, and Cell 1 is a cell under Picol.
  • 8 dBm Bias is set for Cell 1.
  • the solid line is the original coverage of Cell 1
  • the dotted line is the coverage range after the Bias is set for Cell 1.
  • the UE switches from the cell Cell A under Macro A to the cell Cell B under Macro B, and a connection failure occurs after the handover is completed;
  • the UE measures the RSRP of Cell A to be -105 dBm, the RSRP of Cell B is -114 dBm, and the RSRP of Cell 1 is -109 dBm;
  • the UE performs RRC connection reestablishment on Cell A, and after the successful reestablishment, the connection fails to be reported to the base station (ie, Macro A) of the rebuilt cell;
  • the Macro A After determining that the problem is not an overlay problem, the Macro A sends a connection failure Indication message to the base station (ie, Macro B) that has failed to connect;
  • the macro B After receiving the connection failure indication message, the macro B determines the failure and the handover, and determines that the handover source cell and the reestablished cell are the same, and determines the cause of the connection failure.
  • Macro B determines the cause of the connection failure based on the RSRP of each neighboring cell measured by the UE after the connection failure.
  • the macro B sends a HO Report message to the base station (ie, Macro A) to which the cell with the wrong cell parameter setting is located, and the message carries the RSRP information finally obtained before the UE fails to connect.
  • the base station ie, Macro A
  • Macro A determines the premature handover and the handover to the wrong cell based on the received RSRP and the Bias set by Macro A for Pico 1. Specifically:
  • the UE rebuilds in Cell A, but the UE does not consider the AB S and Bias information set by Macro A for Pico 1 when performing cell selection, and Macro A is doing after obtaining RSRP.
  • Pico 1 is at the junction of Macro A, Macro B, and Macro C.
  • Cell A, Cell B, and Cell C are cells under three Macro base stations, respectively, and Cell 1 is a cell under Picol.
  • 8 dBm Bias is set for Cell 1.
  • the solid line is the original coverage of Cell 1
  • the dotted line is the coverage range after the Bias is set for Cell 1.
  • the UE switches from the cell Cell A under Macro A to the cell Cell B under Macro B, and a connection failure occurs after the handover is completed;
  • the UE measures the RSRP of Cell A to be -105 dBm, the RSRP of Cell B is -114 dBm, and the RSRP of Cell 1 is -109 dBm;
  • the UE performs RRC connection reestablishment on Cell A, and the reconstruction fails.
  • Macro A sends a radio link failure indication message to Macro B;
  • Macro B After receiving the message, Macro B determines that there is a second indication message and discards the message.
  • the UE initiates an RRC connection establishment in another cell Cell C in the Idle state. After the connection is successfully established, the UE reports the connection failure report to the base station Macro C where the Cell C is located;
  • Macro C according to the connection failure Report sends a radio link failure indication message to the base station (ie, Macro B) where the connection failure occurs after determining that it is not a coverage problem;
  • the macro B After receiving the radio link failure indication message, the macro B determines the failure and the handover, and determines that the handover source 'J, the area, and the reestablished cell are the same, and determines the cause of the connection failure;
  • the macro B determines that the reason for the connection failure is 'switching too early', and determines the cell with the wrong cell parameter setting according to the result of the judgment;
  • the macro B sends a HO Report message to the base station (ie, Macro A) to which the cell with the wrong cell parameter setting is located, and the message carries the RSRP information finally obtained before the UE fails to connect.
  • the base station ie, Macro A
  • Macro A determines the premature handover and the handover to the wrong cell based on the received RSRP and the Bias set by Macro A for Pico 1. Specifically:
  • the UE rebuilds in Cell A, but the UE does not consider the AB S and Bias information set by Macro A for Pico 1 when performing cell selection, and Macro A is doing after obtaining RSRP.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

本申请实施例涉及无线通信技术领域,特别涉及一种提高移动健壮性的方法、系统和设备,用以提高在Hetnet场景下Macro基站和Pico基站的组网环境中进行移动健壮性的判断准确率。本发明实施例第一网络侧设备向小区参数设置错误的小区所属的第二网络侧设备发送用户设备在发生连接失败之前最后获得的小区的无线信号质量参数值;第二网络侧设备根据小区的无线信号质量参数值,确定对应小区的判决信号质量值,并根据小区的判决信号质量值,确定发生连接失败的原因。由于在Hetnet场景考虑到多层覆盖的情况,提高了Macro基站和Pico基站的组网环境中进行移动健壮性的判断准确率。

Description

一种提高移动健壮性的方法、 系统和设备 本申请要求在 2011年 11月 15 日提交中国专利局、 申请号为 201110361916.6、发明名 称为"一种提高移动健壮性的方法、 系统和设备"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
本发明涉及无线通信技术领域, 特别涉及一种提高移动健壮性的方法、 系统和设备。 背景技术
减少操作管理工作的复杂性, 降低运营维护成本, 是通信运营商的迫切要求。 在下一 代的网络中, 希望通过引入网络自组织的机制, 减少网络规划和操作维护的人工参与, 降 低网络的建设和运营成本。 正是在这样的背景下, 演进的地面无线接入( Evolved Universal Terrestrial Radio Access, E-UTRA ) 系统的自组织网络( Self Organizing Networks, SON ) 特性作为第三代移动通信标准化组织(3rd Generation Partnership Project, 3GPP )的一个工 作议题进行研究。 SON技术包括了自配置、 自优化和自治愈, 自优化是其中一项重要特性。
SON 自优化功能需要监测一些网络和系统性能参数作为输入, 如网络性能指标的统 计、 故障告警、 通知等, 在对输入数据进行分析后, 优化算法做出决策, 最后自动触发相 关网络节点的调整操作。
在移动网络中, 切换参数设置不合适会严重影响系统性能, 最严重的情况是导致用户 掉话。 因此移动性参数自优化是 E-UTRA系统的 SON所要解决的最重要的问题之一, 要 能够减少切换失败的发生, 减少不当切换导致的用户掉话, 以及减少不必要的切换, 避免 这些切换对系统资源的无效使用。
移动健壮性优化( Mobility Robustness Optimization, MRO )首先要做的是, 要准确地 判断问题的根本原因。
判断过早切换的准则如下:
用户设备 ( User Equipment, UE )在切换到目标小区后很快发生连接失败, 然后 UE 在源小区重建连接。
判断切换到错误小区的准则如下:
UE 在切换过程中或切换完成后很快发生连接失败 (无论是在源小区还是在目标小 区) , 然后 UE在一个第三方小区(既非源小区、 也非目标小区)重建连接。
随着日益增长的数据速率以及业务负载的要求, 传统的用宏基站单层覆盖提供接入的 方法已经不能满足需求。釆用分层覆盖,在热点地区或者室内部署一些低功率的基站(Pico 基站(低功率基站) /Femto基站(家庭基站) /Relay (中继)) 能够很好的解决这种问题。
这种低功率的基站是一种应用在家庭室内环境、 办公环境、 或其它热点小覆盖环境下 的基站设备, 能够使得运营商提供更高数据速率、 更低成本的且有吸引力的业务。 为了减 少分层覆盖中的千扰问题, 引入了静默子帧 (Almost Blank Subframe, ABS ), 该子帧在千 扰基站一侧进行配置, 通常应用在 Macro (宏)基站与 Pico基站的组网环境中, 一般由 Macro基站设置 ABS子帧, 同时, 设置 Macro基站和 Pico基站之间的偏移量( Bias )。 这 样就扩大了 Pico基站的覆盖范围。
在版本 10 ( Release 10, R10 )的移动健壮性方案中, 只考虑了普通的宏基站单层覆盖 的方法, 没有考虑 Hetnet (异构网, 即宏基站、 低功率基站、 家庭基站混合组网的场景) 场景下 Macro基站和 Pico基站的组网环境。 例如, 根据目前的 MRO的判断方法, 没有考 虑 Macro基站为 Pico基站设置 ABS 和 Bias的情况, 这样可能将切换到错误小区问题误 判为切换过早。 如图 1所示, 实线是 Pico基站本来的覆盖范围, 虚线是 Macro基站为 Pico 1小区和 Pico2小区配置了 ABS和 Bias后的覆盖范围。但是 Macro基站对于 Picol小区和 Pico2小区的 Bias是通过无线资源控制 (Radio Resource Control, RRC )信令为连接态的 UE配置的, 因此只适用于连接态的切换。对于 UE从 Macro基站切换到 Picol小区之后发 生了连接失败, 随后 UE进行 RRC连接重建的小区是 Macro基站,依据现有的移动健壮性 机制, 把问题原因诊断为切换过早。 但实际上, 这个诊断是不正确的, 因为导致失败问题 的根本原因是切换的目标选择错误,切换后 Picol小区的信号并不足够好,导致掉话。 Macro 基站应当选择 Pico2 小区, 而不是 Picol小区进行切换。
综上所述, 目前由于移动健壮性方案中, 只考虑了普通的宏基站单层覆盖的方法, 使 得在 Hetnet场景下 Macro基站和 Pico基站的组网环境中进行移动健壮性的判断准确率比 较低。
发明内容
本发明实施例提供的一种提高移动健壮性的方法、 系统和设备, 用以提高在 Hetnet场 景下 Macro基站和 Pico基站的组网环境中进行移动健壮性的判断准确率。
本发明实施例提供的一种提高移动健壮性的方法, 包括:
第一网络侧设备在收到针对小区中发生连接失败的用户设备的指示消息后, 确定小区 参数设置错误的小区;
所述第一网络侧设备向确定的小区所属的第二网络侧设备发送所述用户设备在发生 连接失败之前最后获得的小区的无线信号盾量参数值。
本发明实施例提供的另一种提高移动健壮性的方法, 包括:
第二网络侧设备接收来自第一网络侧设备的小区的无线信号盾量参数值 , 其中所述无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
所述第二网络侧设备才 居所述小区无线信号盾量参数值, 确定对应小区的判决信号盾 量值; 所述第二网络侧设备根据小区的判决信号盾量值, 确定发生连接失败的原因; 其中, 所述第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
本发明实施例提供的一种提高移动健壮性的网络侧设备, 包括:
小区确定模块, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确定 小区参数设置错误的小区;
发送模块, 用于向确定的小区所属的第二网络侧设备发送所述用户设备在发生连接失 败之前最后获得的小区的无线信号盾量参数值。
本发明实施例提供的另一种提高移动健壮性的网络侧设备, 包括:
接收模块, 用于接收来自第一网络侧设备的小区的无线信号盾量参数值 , 其中所述无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
盾量值确定模块, 用于根据所述小区无线信号盾量参数值, 确定对应小区的判决信号 盾量值;
判决模块, 用于根据小区的判决信号盾量值, 确定发生连接失败的原因;
其中, 所述第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
本发明实施例提供的一种提高移动健壮性的系统, 包括:
第一网络侧设备, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确 定小区参数设置错误的小区, 向确定的小区所属的第二网络侧设备发送所述用户设备在发 生连接失败之前最后获得的小区的无线信号盾量参数值;
第二网络侧设备, 用于接收来自第一网络侧设备的小区的无线信号盾量参数值, 根据 所述小区无线信号盾量参数值, 确定对应小区的判决信号盾量值, 根据小区的判决信号盾 量值, 确定发生连接失败的原因。
由于在 Hetnet场景考虑到多层覆盖的情况, 提高了 Macro和 Pico的组网环境中进行 移动健壮性的判断准确率; 进一步提高了 MRO的性能。
附图说明
图 1为背景技术中 Hetnet场景的示意图;
图 2为本发明实施例提高移动健壮性的系统结构示意图;
图 3为本发明实施例发送无线信号盾量参数值的网络侧设备结构示意图;
图 4为本发明实施例接收无线信号盾量参数值的网络侧设备结构示意图;
图 5为本发明实施例第一网络侧设备提高移动健壮性的方法流程示意图;
图 6为本发明实施例第二网络侧设备提高移动健壮性的方法流程示意图;
图 7为本发明实施例场景一中提高移动健壮性的方法流程示意图;
图 8为本发明实施例场景二中提高移动健壮性的方法流程示意图;
图 9为本发明实施例场景三的示意图。 具体实施方式
针对背景技术中由于移动健壮性方案中, 只考虑了普通的宏基站单层覆盖的方法, 使 得在 Hetnet场景下 Macro基站和 Pico基站的组网环境中进行移动健壮性的判断准确率比 较低的问题, 本发明实施例第一网络侧设备向 '〗、区参数设置错误的小区所属的第二网络侧 设备发送用户设备在发生连接失败之前最后获得的小区的无线信号盾量参数值; 第二网络 侧设备根据小区的无线信号盾量参数值, 确定对应小区的判决信号盾量值, 并根据小区的 判决信号盾量值, 确定发生连接失败的原因。 由于在 Hetnet场景考虑到多层覆盖的情况, 提高了 Macro基站和 Pico基站的组网环境中进行移动健壮性的判断准确率。
其中, 本发明实施例的无线信号盾量参数值包括但不限于下列参数值中的至少一个: 参考信号接收功率 (Reference signal received power, RSRP )值、 参考信号接收盾量
( Reference Signal Received Quality, RSRQ )值。
在实施中, 本发明实施例的连接失败表示用户设备与接入的小区之间的连接断开, 一 般还可以用无线链路失败( Radio Link Failure, RLF )、 切换失败( HandOver Failure, HOF ) 等表示这种情况的名称替换本发明实施例的连接失败。
下面结合说明书附图对本发明实施例作进一步详细描述。
如图 2所示, 本发明实施例提高移动健壮性的系统包括: 第一网络侧设备 10和第二 网络侧设备 20。
第一网络侧设备 10, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确定小区参数设置错误的小区, 向确定的小区所属的第二网络侧设备 20发送用户设备在 发生连接失败之前最后获得的小区的无线信号盾量参数值;
第二网络侧设备 20,用于接收来自第一网络侧设备 10的小区的无线信号盾量参数值, 根据小区无线信号盾量参数值, 确定对应小区的判决信号盾量值, 根据小区的判决信号盾 量值, 确定发生连接失败的原因。
在实施中, 针对小区中发生连接失败的用户设备的指示消息可以是无线链路失败指示 消息。
较佳地, 第一网络侧设备 10可以将用户设备在发生连接失败之前最后获得的小区的 无线信号盾量参数值置于接口信令中, 并将该接口信令发送给第二网络侧设备 20;
相应的, 第二网络侧设备 20在收到接口信令消息后, 从接口信令中提取出用户设备 在发生连接失败之前最后获得的小区的无线信号盾量参数值。
在实施中, 本发明实施例的接口信令包括但不限于下列消息中的一种:
切换报告 ( Handover Report )。
由于用户设备在发生连接失败后 , 向网络侧上报的信息里除了包含在发生连接失败之 前最后获得的小区的无线信号盾量参数值, 还包含连接失败相关的小区信息, 所以第一网 络侧设备 10可以将连接失败相关信息发送给第二网络侧设备 20。
一种较佳地处理方式是: 第一网络侧设备 10 直接将这些信息转发给第二网络侧设备 20。 也就是说, 第一网络侧设备 10将用户设备在发生连接失败之前最后获得的小区的无 线信号盾量参数值以及连接失败相关信息一起发送给第二网络侧设备 20。
其中, 本发明实施例连接失败相关信息包括但不限于下列信息中的至少一种: 发生连接失败时服务小区的小区标识、 连接失败后 UE尝试重建连接的小区标识, UE 在上述服务小区的标识。
在实施中, 第二网络侧设备 20接收到的小区的无线信号盾量参数值可能包括多个小 区的无线信号盾量参数值。
由于有的小区进行了范围扩展处理, 有的小区没有进行范围扩展处理, 所以需要针对 不同的小区进行不同处理。 具体的:
针对一个小区, 若该小区没有进行范围扩展处理, 第二网络侧设备将该小区的无线信 号盾量参数值作为该小区对应的判决信号盾量值;
针对一个邻小区, 若该小区进行范围扩展处理, 第二网络侧设备根据该小区的无线信 号盾量参数值和该小区的偏移量(Bias )确定该小区对应的判决信号盾量值。
比如, 一个小区进行范围扩展处理, 则该小区的判决信号盾量值等于该小区的无线信 号盾量参数值和该小区的偏移量之和。
其中, 偏移量是网络预配置的小区信号功率补偿值。
第二网络侧设备 20在确定了各个小区的判决信号盾量值后, 就可以对发生连接失败 的原因进行判断, 看符合哪种原因。
比如: 用户设备从 A切换到 B后, 根据各个小区的判决信号盾量值, 确定用户设备应 该在 C进行 RRC重建, 则符合切换到错误小区的准则, 可以确定连接失败的原因是切换 到错误小区。
比如: 用户设备从 A切换到 B后, 根据各个小区的判决信号盾量值, 确定用户设备应 该在 A进行 RRC重建, 则符合过早切换的准则, 可以确定连接失败的原因是过早切换。
在实施中, 若无线信号盾量参数值有多种, 则判决信号盾量值就有多种, 这时较佳地 一种处理方式是: 将每种判决信号盾量值分别进行判断, 若判断结果一致, 则确定判断结 果就是连接失败的原因; 若判断结果不一致, 则丢弃本次判断结果。
比如若无线信号盾量参数值有 RSRP和 RSRQ, 若将 RSRP单独进行判断的结果为切 换到错误小区, 将 RSRQ单独进行判断的结果为切换到错误小区, 则可以确定判断结果就 是切换到错误小区; 若将 RSRP单独进行判断的结果为切换到错误小区, 将 RSRQ单独进 行判断的结果为过早切换, 则丢弃本次结果。
需要说明的是: 本发明实施例无线信号盾量参数值有多种时并不局限于上述处理方 式, 其他在无线信号盾量参数值有多种时能够进行判断的方式都适用本发明实施例。
其中, 本发明实施例的网络侧设备可以^ &站(比如宏基站、 家庭基站等), 也可以 是 RN (中继)设备, 还可以是其它网络侧设备。
基于同一发明构思, 本发明实施例中还提供了提高移动健壮性的系统中的网络侧设 备、 及提高移动健壮性的方法, 由于这些设备和方法解决问题的原理与提高移动健壮性的 系统相似, 因此这些设备和方法的实施可以参见系统的实施, 重复之处不再赘述。
如图 3所示, 本发明实施例发送无线信号盾量参数值的网络侧设备包括: 小区确定模 块 300和发送模块 310。
小区确定模块 300, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确定小区参数设置错误的小区;
发送模块 310, 用于向小区确定模块 300确定的小区所属的第二网络侧设备发送用户 设备在发生连接失败之前最后获得的小区的无线信号盾量参数值。
较佳地, 发送模块 310通过接口信令发送无线信号盾量参数。
较佳地, 发送模块 310将连接失败相关信息发送给第二网络侧设备。
如图 4所示,本发明实施例接收无线信号盾量参数值的网络侧设备包括:接收模块 400、 质量值确定模块 410和判决模块 420。
接收模块 400 , 用于接收来自第一网络侧设备的小区的无线信号盾量参数值, 其中无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
盾量值确定模块 410, 用于根据接收模块 400的小区无线信号盾量参数值, 确定对应 小区的判决信号盾量值;
判决模块 420, 用于根据盾量值确定模块 410确定的小区的判决信号盾量值, 确定发 生连接失败的原因;
其中, 第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
较佳地, 接收模块 400接收来自第一网络侧设备的包含无线信号盾量参数值的接口信 令。
较佳地, 针对一个小区, 若该小区没有进行范围扩展处理, 盾量值确定模块 410将该 小区的无线信号盾量参数值作为该小区对应的判决信号盾量值;
较佳地, 针对一个邻小区, 若该小区进行范围扩展处理, 盾量值确定模块 410根据该 小区的无线信号盾量参数值和该小区的偏移量确定该小区对应的判决信号盾量值。
在实施中, 根据不同的应用场景发送无线信号盾量参数值的网络侧设备也可能成为接 收无线信号盾量参数值的网络侧设备; 相应的, 接收无线信号盾量参数值的网络侧设备也 可能成为发送无线信号盾量参数值的网络侧设备, 所以较佳地, 图 3中发送无线信号盾量 参数值的网络侧设备中的模块和图 4中接收无线信号盾量参数值的网络侧设备中的模块还 可以合在一个网络侧设备中, 并根据需要选择对应的模块工作。
如图 5所示, 本发明实施例第一网络侧设备提高移动健壮性的方法包括下列步骤: 步骤 501、第一网络侧设备在收到针对小区中发生连接失败的用户设备的指示消息后, 确定小区参数设置错误的小区;
步骤 502、 第一网络侧设备向确定的小区所属的第二网络侧设备发送用户设备在发生 连接失败之前最后获得的小区的无线信号盾量参数值。
较佳地, 步骤 502中, 第一网络侧设备可以将用户设备在发生连接失败之前最后获得 的小区的无线信号盾量参数值置于接口信令中, 并将该接口信令消息发送给第二网络侧设 备。
较佳地, 步骤 502中, 第一网络侧设备可以将连接失败相关信息发送给第二网络侧设 备。
比如: 第一网络侧设备将用户设备在发生连接失败之前最后获得的小区的无线信号盾 量参数值以及连接失败相关信息一起发送给第二网络侧设备。
如图 6所示, 本发明实施例第二网络侧设备提高移动健壮性的方法包括下列步骤: 步骤 601、 第二网络侧设备接收来自第一网络侧设备的小区的无线信号盾量参数值, 其中无线信号盾量参数值是用户设备在发生连接失败之前最后获得的, 第一网络侧设备是 用户设备发生连接失败时接入的网络侧设备;
步骤 602、 第二网络侧设备根据小区无线信号盾量参数值, 确定对应小区的判决信号 盾量值;
步骤 603、 第二网络侧设备根据小区的判决信号盾量值, 确定发生连接失败的原因。 较佳地, 步骤 601中, 第二网络侧设备接收来自第一网络侧设备的包含无线信号盾量 参数值的接口信令。
较佳地, 步骤 602中, 针对一个小区, 若该小区没有进行范围扩展处理, 第二网络侧 设备将该小区的无线信号盾量参数值作为该小区对应的判决信号盾量值。
较佳地, 步骤 602中, 针对一个邻小区, 若该小区进行范围扩展处理, 第二网络侧设 备根据该小区的无线信号盾量参数值和该小区的偏移量确定该小区对应的判决信号盾量 值。
步骤 603中, 第二网络侧设备在确定了各个小区的判决信号盾量值后, 就可以对发生 连接失败的原因进行判断, 看符合哪种原因。
比如: 用户设备从 A切换到 B后, 根据各个小区的判决信号盾量值, 确定用户设备应 该在 C进行 RRC重建, 则符合切换到错误小区的准则, 可以确定连接失败的原因是切换 到错误小区。
比如: 用户设备从 A切换到 B后, 根据各个小区的判决信号盾量值, 确定用户设备应 该在 A进行 RRC重建, 则符合过早切换的准则, 可以确定连接失败的原因是过早切换。 其中, 图 5和图 6可以合成一个流程, 形成一个提高移动健壮性的方法, 即先执行步 骤 501和步骤 502, 再执行步骤 601 ~步骤 603。
在实施中, 第一网络侧设备和第二网络侧设备可以是相同类型的网络侧设备, 比如可 以都是 Macro基站; 也可以是不同类型的网络侧设备, 比如一个是 Macro基站, 一个是
Pico基站。
下面以几个具体场景对本发明的方案进行详细说明, 其中在下面的场景中以小区无线 信号盾量参数值是 RSRP值为例进行说明, 小区无线信号盾量参数值是其它值的情况与小 区无线信号盾量参数值是 RSRP值类似, 在此不再赘述。
场景一: Pico 1和 Pico 2都是 Macro基站覆盖范围下的两个低功率基站。 为了对 Pico 基站进行 Range Extension (范围扩展 )处理, Macro A ( Macro基站的 Cell )为 Pico 1下的 Cell 1和 Pico 2下的 Cell 2都设置了 8dBm的 Bias。
如图 7所示, 本发明实施例场景一中提高移动健壮性的方法示意图中:
UE从 Macro A下的小区 Cell A切换到 Pico 1下的小区 Cell 1;
切换完成后 UE在 Pico 1的 Cell 1中发生了连接失败;
UE在连接失败后测量的 Macro A的 RSRP为 -105dBm, Cell 1的 RSRP为 -114dBm, Cell 2的 RSRP为 -109dBm;
UE在 Macro A中进行 RRC连接重建, 重建成功后 UE将连接失败 4艮告 ( Report )上 报给重建小区所在基站(即 Macro A );
Macro A根据连接失败 Report在确定不是覆盖问题后, 向发生连接失败的基站(即
Picol )发送无线链路失败指示 ( RLF Indication ) 消息;
Pico 1收到无线链路失败指示消息后, 在确定失败和切换有关, 并且确定切换源 、区 和重建小区相同后, 对连接失败的原因进行判断;
Pico 1根据 UE在连接失败后测量的各邻小区的 RSRP,判断发生连接失败的原因是 '切 换过早', 并根据判断的结果确定小区参数设置错误的小区;
Pico 1向小区参数设置错误的小区所属的基站(即 Macro A )发送 HO ( Handover ) Report消息, 同时在消息中携带 UE发生连接失败之前最后获得的 RSRP信息;
Macro A根据收到的 RSRP以及 Macro A为 Pico 1和 Pico 2设置的 Bias , 进行确切的 切换过早和切换到错误小区的判断, 具体的:
虽然 Cell Α的信号盾量最好, UE在 Cell A进行重建, 但是 UE在进行小区选择的时 候没有考虑 Macro A为 Pico设置的 AB S以及 Bias信息, 而 Macro A在获取 RSRP后, 在 进行判断时会考虑 Pico的 Bias,即 Pico 1的 Cell 1是 RSRP+Bias = -106dBm, Pico 2的 Cell
2是 RSRP+Bias = -lOldBm, Cell A是 RSRP = -105dBm。 由于 Cell 2是 -lOldBm高于 Cell A的 -105dBm, 因此从 Macro A的角度, 实际上 UE 应该选择在 Cell 2进行 RRC 连接重建。 因此, 实际应该是 UE从 Macro A切换到 Cell 1 后发生连接失败, 随后应选择 Cell 2进行 RRC 连接重建, 而从 A切换到 B, 发生连接失 败后在选择 C的过程符合切换到错误小区的准则,所以 Macro A判断的结果是一次切换到 错误小区。
场景二: Pico 1和 Pico 2都是 Macro A覆盖范围下的两个低功率基站。 为了对 Pico进 行 Range Extension, Macro A为 Pico 1下的 Cell 1和 Pico 2下的 Cell 2都设置了 8dBm的 BiaSo
如图 8所示, 本发明实施例场景二中提高移动健壮性的方法包括:
UE从 Macro A下的小区 Cell A切换到 Pico 1下的小区 Cell 1;
切换完成后 UE在 Pico 1的 Cell 1中发生了连接失败;
UE在连接失败后测量的 Cell A的 RSRP为 -105dBm, Cell 1的 RSRP为 -114dBm, CELL 2的 RSRP为 -109dBm;
UE在 Cell A中进行 RRC连接重建, 重建失败;
Macro A向 Pico 1发送无线链路失败指示消息;
Pico 1收到该消息后, 判断会有第二条无线链路失败指示消息, 丢弃该消息;
UE在另一个小区 Cell B以 Idle (空闲)态发起 RRC连接建立, 连接建立成功后, UE 将连接失败 Report上报给 Cell B所在的基站 B;
基站 B 根据连接失败 Report在确定不是覆盖问题后, 向发生连接失败的基站 (即 Picol )发送无线链路失败指示消息;
Picol 在收到无线链路失败指示消息后, 在确定失败和切换有关, 并且确定切换源小 区和重建小区相同后, 对连接失败的原因进行判断;
Pico 1根据 UE在连接失败后测量的各邻小区的 RSRP,判断发生连接失败的原因是 '切 换过早', 并根据判断的结果确定小区参数设置错误的小区;
Pico 1向小区参数设置错误的小区所属的基站(即 Macro A )发送 HO Report消息, 同 时在消息中携带 UE发生连接失败之前最后获得的 RSRP信息;
Macro A根据收到的 RSRP以及 Macro A为 Pico 1和 Pico 2设置的 Bias , 进行确切的 切换过早和切换到错误小区的判断, 具体的:
虽然 Cell A的信号盾量最好, UE在 Cell A进行重建, 但是 UE在进行小区选择的时 候没有考虑 Macro A为 Pico设置的 ABS以及 Bias信息, 而 Macro A在获取 RSRP后, 在 进行判断时会考虑 Pico的 Bias, 即 Pico 1的 Cell 1是 RSRP+Bias = -106dBm, Pico2的 Cell
2是 RSRP+Bias = -lOldBm, Cell A是 RSRP = -105dBm。
由于 Cell 2是 -lOldBm高于 Cell A的 -105dBm, 因此从 Macro A的角度, 实际上 UE 应该选择在 Cell 2进行 RRC 连接重建。 因此, 这个问题实际应该是 UE从 Macro A切换 到 Cell 1后发生连接失败, 随后应选择 Cell 2进行 RRC 连接重建, 而从 A切换到 B,发生 连接失败后在选择 C的过程符合切换到错误小区的准则,所以 Macro A判断的结果是一次 切换到错误小区。
场景三: Pico 1位于 Macro A、 Macro B和 Macro C的交界。 Cell A、 Cell B和 Cell C 分别是三个 Macro基站下的小区, Cell 1 是 Picol 下的小区。 为了对 Celll 进行 Range Extension, Macro A、 Macro B和 Macro C老)^为 Cell 1设置了 8dBm的 Bias。
如图 9所示, 本发明实施例场景三的示意图中, 实线是 Cell 1本来的覆盖范围, 虚线 是为 Cell 1设置了 Bias后的覆盖范围。
UE从 Macro A下的小区 Cell A切换到 Macro B下的小区 Cell B , 切换完成后发生了 连接失败;
UE在连接失败后测量 Cell A的 RSRP为 -105dBm, Cell B的 RSRP为 -114dBm, Cell 1 的 RSRP为 -109dBm;
UE在 Cell A进行 RRC连接重建, 重建成功后将连接失败 Report上 4艮给重建小区所 在基站(即 Macro A );
Macro A在确定不是覆盖问题后, 向发生连接失败的基站(即 Macro B )发送连接失 败 Indication消息;
Macro B收到连接失败 Indication消息后, 在确定失败和切换有关, 并且确定切换源 小区和重建小区相同后, 对连接失败的原因进行判断;
Macro B根据 UE在连接失败后测量的各邻小区的 RSRP,判断发生连接失败的原因是
'切换过早' , 并根据判断的结果确定小区参数设置错误的小区 (由于 Macro B无法知道 Macro A为 Pico 1设置的 Bias的值, 所以 Macro B在判断是没有考虑 Bias );
Macro B向小区参数设置错误的小区所属的基站(即 Macro A )发送 HO Report消息, 同时在消息中携带 UE发生连接失败之前最后获得的 RSRP信息;
Macro A根据收到的 RSRP以及 Macro A为 Pico 1设置的 Bias , 进行确切的切换过早 和切换到错误小区的判断, 具体的:
虽然 Cell A的信号盾量最好, UE在 Cell A进行重建, 但是 UE在进行小区选择的时 候没有考虑 Macro A为 Pico 1设置的 AB S以及 Bias信息, 而 Macro A在获取 RSRP后, 在进行判断时会考虑 Pico 1的 Bias, 即 Pico 1的 Cell 1是 RSRP+Bias = -lOldBm, Macro A 的 Cell A是 RSRP = -105dBm, Macro B的 Cell B是 RSRP = -114dBm。
由于 Cell 1是 -lOldBm高于 Cell A的 -105dBm, 因此从 Macro A的角度, 实际上 UE 应该选择在 Cell 1进行 RRC 连接重建。 因此,这个问题实际应该是 UE从 Macro A的 Cell A切换到 Macro B的 Cell B后发生连接失败, 随后应选择 Cell 1进行 RRC 连接重建, 而 从 A切换到 B, 发生连接失败后在选择 C的过程符合切换到错误小区的准则, 所以 Macro A判断的结果是一次切换到错误小区。
场景四、 Pico 1位于 Macro A、 Macro B和 Macro C的交界。 Cell A、 Cell B和 Cell C 分别是三个 Macro基站下的小区, Cell 1 是 Picol 下的小区。 为了对 Celll 进行 Range Extension, Macro A、 Macro B和 Macro C老)^为 Cell 1设置了 8dBm的 Bias。
如图 9所示, 本发明实施例场景三的示意图中, 实线是 Cell 1本来的覆盖范围, 虚线 是为 Cell 1设置了 Bias后的覆盖范围。
UE从 Macro A下的小区 Cell A切换到 Macro B下的小区 Cell B , 切换完成后发生了 连接失败;
UE在连接失败后测量 Cell A的 RSRP为 -105dBm, Cell B的 RSRP为 -114dBm, Cell 1 的 RSRP为 -109dBm;
UE在 Cell A进行 RRC连接重建, 重建失败;
Macro A向 Macro B发送无线链路失败指示消息;
Macro B收到该消息后, 判断会有第二条指示消息, 丢弃该消息;
UE在另一个小区 Cell C以 Idle态发起 RRC连接建立, 连接建立成功后, UE将连接 失败 Report上报给 Cell C所在的基站 Macro C;
Macro C根据连接失败 Report在确定不是覆盖问题后, 向发生连接失败的基站(即 Macro B )发送无线链路失败指示消息;
Macro B收到无线链路失败指示消息后, 在确定失败和切换有关, 并且确定切换源 'J、 区和重建小区相同后, 对连接失败的原因进行判断;
Macro B根据 UE在连接失败后测量的各邻小区的 RSRP,判断发生连接失败的原因是 '切换过早' , 并根据判断的结果确定小区参数设置错误的小区;
Macro B向小区参数设置错误的小区所属的基站(即 Macro A )发送 HO Report消息, 同时在消息中携带 UE发生连接失败之前最后获得的 RSRP信息;
Macro A根据收到的 RSRP以及 Macro A为 Pico 1设置的 Bias , 进行确切的切换过早 和切换到错误小区的判断, 具体的:
虽然 Cell A的信号盾量最好, UE在 Cell A进行重建, 但是 UE在进行小区选择的时 候没有考虑 Macro A为 Pico 1设置的 AB S以及 Bias信息, 而 Macro A在获取 RSRP后, 在进行判断时会考虑 Pico 1的 Bias, 即 Pico 1的 Cell 1是 RSRP+Bias = -lOldBm, Macro A 的 Cell A是 RSRP = -105dBm, Macro B的 Cell B是 RSRP = -114dBm。
由于 Celll是 -lOldBm高于 Cell A的 -105dBm, 因此从 Macro A的角度, 实际上 UE 应该选择在 Cell 1进行 RRC 连接重建。 因此,这个问题实际应该是 UE从 Macro A的 Cell A切换到 Macro B的 Cell B后发生连接失败, 随后应选择 Cell 1进行 RRC 连接重建, 而 从 A切换到 B , 发生连接失败后在选择 C的过程符合切换到错误小区的准则, 所以 Macro A判断的结果是一次切换到错误小区。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种提高移动健壮性的方法, 其特征在于, 该方法包括:
第一网络侧设备在收到针对小区中发生连接失败的用户设备的指示消息后, 确定小区 参数设置错误的小区;
所述第一网络侧设备向确定的小区所属的第二网络侧设备发送所述用户设备在发生 连接失败之前最后获得的小区的无线信号盾量参数值。
2、 如权利要求 1 所述的方法, 其特征在于, 所述第一网络侧设备发送无线信号盾量 参数值包括:
所述第一网络侧设备通过接口信令发送无线信号盾量参数值。
3、 如权利要求 1 所述的方法, 其特征在于, 所述小区无线信号盾量参数值包括参考 信号接收盾量 RSRQ值和 /或参考信号接收功率 RSRP值。
4、 如权利要求 1 ~ 3任一所述的方法, 其特征在于, 所述第一网络侧设备发送无线信 号盾量参数值还包括:
所述第一网络侧设备将连接失败相关信息发送给第二网络侧设备。
5、 一种提高移动健壮性的方法, 其特征在于, 该方法包括:
第二网络侧设备接收来自第一网络侧设备的小区的无线信号盾量参数值 , 其中所述无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
所述第二网络侧设备才 居所述小区无线信号盾量参数值, 确定对应小区的判决信号盾 量值;
所述第二网络侧设备根据小区的判决信号盾量值, 确定发生连接失败的原因; 其中, 所述第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
6、 如权利要求 5 所述的方法, 其特征在于, 所述第二网络侧设备确定判决信号盾量 值包括:
针对一个小区, 若该小区没有进行范围扩展处理, 所述第二网络侧设备将该小区的无 线信号盾量参数值作为该小区对应的判决信号盾量值;
针对一个邻小区, 若该小区进行范围扩展处理, 所述第二网络侧设备根据该小区的无 线信号盾量参数值和该小区的偏移量确定该小区对应的判决信号盾量值。
7、 如权利要求 5 所述的方法, 其特征在于, 所述第二网络侧设备接收无线信号盾量 参数值包括:
所述第二网络侧设备接收来自所述第一网络侧设备的包含无线信号盾量参数值的接 口信令。
8、 如权利要求 5 ~ 7任一所述的方法, 其特征在于, 所述小区无线信号盾量参数值包 括 RSRQ值和 /或 RSRP值。
9、 一种提高移动健壮性的网络侧设备, 其特征在于, 该网络侧设备包括: 小区确定模块, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确定 小区参数设置错误的小区;
发送模块, 用于向确定的小区所属的第二网络侧设备发送所述用户设备在发生连接失 败之前最后获得的小区的无线信号盾量参数值。
10、 如权利要求 9所述的网络侧设备, 其特征在于, 所述发送模块具体用于: 通过接口信令发送无线信号盾量参数值。
11、 如权利要求 9或 10所述的网络侧设备, 其特征在于, 所述发送模块还用于: 将连接失败相关信息发送给第二网络侧设备。
12、 如权利要求 9或 10所述的网络侧设备, 其特征在于, 所述网络侧设备还包括: 接收模块, 用于接收来自第一网络侧设备的小区的无线信号盾量参数值 , 其中所述无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
盾量值确定模块, 用于根据所述小区无线信号盾量参数值, 确定对应小区的判决信号 盾量值;
判决模块, 用于根据小区的判决信号盾量值, 确定发生连接失败的原因;
其中, 所述第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
13、 如权利要求 12所述的网络侧设备, 其特征在于, 所述盾量值确定模块具体用于: 针对一个小区, 若该小区没有进行范围扩展处理, 将该小区的无线信号盾量参数值作 为该小区对应的判决信号盾量值;
针对一个邻小区, 若该小区进行范围扩展处理, 根据该小区的无线信号盾量参数值和 该小区的偏移量确定该小区对应的判决信号盾量值。
14、 如权利要求 12所述的网络侧设备, 其特征在于, 所述接收模块具体用于: 接收来自所述第一网络侧设备的包含无线信号盾量参数值的接口信令。
15、 一种提高移动健壮性的网络侧设备, 其特征在于, 该网络侧设备包括: 接收模块, 用于接收来自第一网络侧设备的小区的无线信号盾量参数值, 其中所述无 线信号盾量参数值是用户设备在发生连接失败之前最后获得的;
盾量值确定模块, 用于根据所述小区无线信号盾量参数值, 确定对应小区的判决信号 盾量值;
判决模块, 用于根据所述小区的判决信号盾量值, 确定发生连接失败的原因; 其中, 所述第一网络侧设备是用户设备发生连接失败时接入的网络侧设备。
16、 如权利要求 15所述的网络侧设备, 其特征在于, 所述盾量值确定模块具体用于: 针对一个小区, 若该小区没有进行范围扩展处理, 将该小区的无线信号盾量参数值作 为该小区对应的判决信号盾量值; 针对一个邻小区, 若该小区进行范围扩展处理, 根据该小区的无线信号盾量参数值和 该小区的偏移量确定该小区对应的判决信号盾量值。
17、 如权利要求 15或 16所述的网络侧设备, 其特征在于, 所述接收模块具体用于: 接收来自所述第一网络侧设备的包含无线信号盾量参数值的接口信令。
18、 一种提高移动健壮性的系统, 其特征在于, 该系统包括:
第一网络侧设备, 用于在收到针对小区中发生连接失败的用户设备的指示消息后, 确 定小区参数设置错误的小区, 向确定的小区所属的第二网络侧设备发送所述用户设备在发 生连接失败之前最后获得的小区的无线信号盾量参数值;
第二网络侧设备, 用于接收来自第一网络侧设备的小区的无线信号盾量参数值, 根据 所述小区无线信号盾量参数值, 确定对应小区的判决信号盾量值, 根据小区的判决信号盾 量值, 确定发生连接失败的原因。
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