WO2012040940A1 - Procédé et appareil adaptés pour mesurer la qualité d'un signal radio - Google Patents

Procédé et appareil adaptés pour mesurer la qualité d'un signal radio Download PDF

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Publication number
WO2012040940A1
WO2012040940A1 PCT/CN2010/077548 CN2010077548W WO2012040940A1 WO 2012040940 A1 WO2012040940 A1 WO 2012040940A1 CN 2010077548 W CN2010077548 W CN 2010077548W WO 2012040940 A1 WO2012040940 A1 WO 2012040940A1
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WIPO (PCT)
Prior art keywords
base station
signal quality
cellular base
measurement mode
interfering
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PCT/CN2010/077548
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English (en)
Chinese (zh)
Inventor
杜忠达
邬华明
汪孙节
朱常青
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2010/077548 priority Critical patent/WO2012040940A1/fr
Publication of WO2012040940A1 publication Critical patent/WO2012040940A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present invention relates to signal measurement techniques, and more particularly to a method and apparatus for measuring wireless signal quality. Background technique
  • FIG. 1 is a schematic diagram of respective coverage areas of a macrocell macrocell and a low power node.
  • a macrocell base station When macrocell base stations and LPNs belong to different frequency layers, the most important issue is mobility management. Generally, the operator causes the high-speed mobile user equipment (UE) to stay and move in the macro-cell base station; if the coverage of the low-power node is available to the low-speed mobile UE, the low-speed mobile UE stays in the low-power node And moving. Sometimes a macrocell base station is also called an umbrella cell.
  • UE mobile user equipment
  • the problem of co-channel interference occurs. This is because: Usually LPN is used to increase capacity rather than expand coverage. Therefore these LPNs are located within the coverage of the macrocell base station.
  • the UE accesses the macro cell base station, it will be interfered by the downlink of the LPN, such as the downlink interference of the femtocell base station that does not allow access by the UE.
  • the first scenario is that a UE (referred to as MUE) accessing a macrocell base station is interfered by a femtocell.
  • Femtocells only authenticated A small number of UEs have been accessed.
  • the femtocell base station operates in an uncoordinated manner.
  • FIG. 2 when the MUE traverses the coverage of the femtocell that does not allow itself to access, even if the radio signal quality of the femtocell is good, the MUE does not allow access to the femtocell. Therefore, the downlink of the MUE is interfered by the femtocell.
  • a UE accessing a picocell base station is interfered by a macrocell base station.
  • the PUE is close to the coverage of the picocell.
  • the macrocell knows that the radio signal quality of the picocell is good. Since the UEs all allow access to the picocell, when the PUE is close to the picocell, the PUE disconnects from the macrocell and accesses the picocell. Since part or all of the picocell base station is located in the macrocell base station, the downlink of the PUE is interfered by the macrocell base station.
  • one method for solving the problem of co-channel interference is to perform resource division between a macro cell base station and a femto cell base station, or between a macro cell base station and a pico cell base station, that is, the interfering cell base station temporarily reduces or disables. Part of the radio resources, and let the victim cellular base station work during these time periods.
  • the interfering cellular base station (aggressor) refers to a cell that interferes with other cellular base stations
  • the victim cellular base station (victim) refers to a cell that is interfered by other cellular base stations.
  • LTE Long Term Evolution
  • the resource granularity of an LTE system is also a subframe in the time domain. Therefore, a subframe can be used as a unit of resource division when resource division.
  • Figure 4 shows an example of resource partitioning. As shown in Figure 4, the even-numbered subframes are allocated to the interfering cellular base station, that is, the interfering cellular base station reduces or stops using the odd-numbered subframes, and the odd-numbered sub-frames
  • the frame configuration is used by the victim cellular base station.
  • the subframes configured for use by the victim cellular base station are referred to as non-interfering subframes, and the other subframes are referred to as interfered subframes.
  • a sub-frame consists of several symbols, such as 14 symbols, as shown in Figure 5.
  • the first few symbols such as 1 ⁇ 3 symbols, are used by the physical layer control signaling; among the remaining symbols, except for some reference letters.
  • the number is used by data other than the cell-specific reference signal (CRS).
  • each small square represents a resource element (RE) that is determined by a symbol in the time domain and a subcarrier on the frequency domain.
  • RE resource element
  • the non-interfering subframe can be configured as a multimedia broadcast multicast service (MBMS) subframe, that is, the first few symbols used by the physical control signaling are not processed. The rest of the symbols are vacant, including all the symbols that should have been used by the data and CRS.
  • MBMS multimedia broadcast multicast service
  • Another method is: In the entire sub-frame, only the symbols used by the CRS are not processed, and the rest of the symbols are all vacant.
  • the UE monitors the downlink radio signal quality by measuring the CRS of the serving cell site every 10 ms, so each subframe is possible. Measured by the UE at the physical layer. If the radio signal quality of the serving cellular base station is always worse than the predetermined threshold Qout within a predetermined time, the UE announces that the radio link fails; unless the radio signal quality of the serving cellular base station is scheduled before the UE announces If the time becomes better than the predetermined threshold Qin, the UE does not announce the UE.
  • the UE If the radio link monitor (RLM) mode is not changed after the interfered cellular base station uses the non-dry 4 subframe, the UE The wrong RLF may be announced.
  • the reason is: The UE will measure the interfered subframes that are used by the interfering cellular base station and the interfered cellular base station. Therefore, the quality of the wireless signal is poorly monitored in these interfered subframes, and then the announcement is made. RLF; However, since the resource partitioning is used, the communication of the user plane is still normal, so the RLF is wrong.
  • the UE disconnects from the radio link and re-establishes a Radio Resource Control (RRC) connection, which will interrupt the ongoing communication between the UE and the serving cellular base station.
  • RRC Radio Resource Control
  • the main object of the present invention is to provide a method for measuring wireless signal quality. And the device can prevent the UE from declaring the wrong RLF.
  • a method of measuring wireless signal quality including:
  • the restricted measurement mode refers to the UE ignoring the interfered subframe when measuring the wireless signal quality of the serving cellular base station according to the resource splitting condition of the interfering cellular base station.
  • the measured wireless signal quality of the serving cellular base station only considering the wireless signal quality of the serving cellular base station measured at the non-interfering subframe; wherein, the non-interfering subframe refers to the subframe configured for use by the serving cellular base station, and the remaining sub-frames
  • the frame is a victim subframe.
  • the method further includes: when the serving cellular base station is a macro cellular base station, and the interfering cellular base station is a femtocell base station that does not allow access by the UE, and after the UE confirms entering the coverage area of the interfering cellular base station, according to The resource splitting condition of the picocell base station, and the notification that the macrocell base station sends in advance the UE changes the measurement mode after entering the coverage area of the interfering cell base station, and the UE changes the currently used conventional measurement mode to the restricted measurement mode;
  • the conventional measurement mode refers to: The UE considers the radio signal quality of the serving cellular base station measured at each subframe.
  • the method further includes: after the UE confirms leaving the coverage area of the interfering cellular base station, according to a notification that the macro cellular base station sends in advance, when the UE confirms to leave the coverage area of the interfering cellular base station, the UE changes the measurement mode, and the UE uses the current usage.
  • the limited measurement method is changed to the conventional measurement method.
  • the method further includes: when the serving cellular base station is a macro cellular base station, and the interfering base station is a femtocell base station that does not allow access by the UE, and after the UE confirms entering the coverage area of the interfering cellular base station, the UE receives the macro The first notification of changing the measurement mode sent by the cellular base station, and changing the currently used conventional measurement mode to the restricted measurement mode according to the first notification and the resource division of the femtocell.
  • the method further includes: after the UE confirms the coverage area of the interfering cell base station, the UE receives a second notification of the change measurement mode sent by the macro cell base station, and uses the limited measurement mode currently used according to the second notification. Change to the conventional measurement method.
  • the UE confirms the coverage of the interfering cellular base station by:
  • the UE measures that the radio signal quality of the interfering cell base station is higher than the radio signal quality of the macro cell base station by a predetermined first threshold value for a predetermined first time period;
  • the UE confirms the coverage of the interfering cellular base station by:
  • the UE measures that the radio signal quality of the interfering cellular base station is lower than a predetermined second threshold value for the radio signal quality of the macrocell base station for a predetermined second period of time.
  • the method further includes: when the serving cellular base station is a macro cellular base station, the interfering cellular base station is a low power node that allows the UE to access, and when the UE confirms entering the coverage area of the low power node, according to the low power node
  • the UE switches to the low power node via the first handover command message sent by the macro cell base station; and after the handover is completed, according to the resource segmentation condition of the macro cell base station included in the first handover command message, the UE will use the conventional measurement currently used.
  • the mode is changed to the limited measurement method.
  • the method further includes: after the UE confirms leaving the coverage area of the low power node, the UE switches back to the macro cell according to the second handover command message sent by the macro cell base station via the low power node, and after the handover is completed, The UE changes the currently used limited measurement mode to the conventional measurement mode.
  • U E confirms the coverage of entering the low power node by:
  • the UE measures that the wireless signal quality of the low power node is higher than the wireless signal quality of the macrocell base station by a predetermined first threshold value for a predetermined first time period;
  • the UE confirms the coverage of leaving the low power node by:
  • the UE measures that the wireless signal quality of the low power node is lower than the predetermined second threshold value of the macrocell base station for a predetermined second time period.
  • the low power node is a picocellular base station or a femtocell base station that allows the UE to access.
  • a wireless signal quality measuring apparatus the apparatus is located in a UE, where the apparatus is configured to: when a UE is interfered by an interfering cellular base station, use a limited measurement mode; wherein the restricted measurement mode refers to a device according to a resource of the interfering cellular base station In the case of the division, when measuring the radio signal quality of the serving cellular base station, the quality of the radio signal measured at the interfered subframe is ignored, and only the quality of the radio signal measured at the non-interfering subframe is considered; wherein, the non-interfering subframe refers to the configuration For the subframe used by the serving cellular base station, the remaining subframes are interfered subframes.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering cellular base station is a femtocell base station that does not allow the UE to access, and when the device confirms entering the coverage area of the interfering cellular base station, according to the a resource splitting situation of the femtocell, and a notification sent by the macrocell base station to change the measurement mode after the device confirms entering the coverage area of the interfering cell base station, and changes the currently used conventional measurement mode to the restricted measurement mode;
  • the conventional measurement mode refers to: The device considers the wireless signal quality of the serving cellular base station measured at each subframe.
  • the device is further configured to: after the device confirms leaving the coverage area of the interfering cell base station, according to a notification sent by the macro cell base station in advance, when the device confirms to leave the coverage area of the interfering cell base station, the measurement mode is changed, and the current use is performed.
  • the limited measurement method is changed to the conventional measurement method.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering base station is a femtocell base station that does not allow the UE to access, and when the device confirms entering the coverage area of the interfering cellular base station, receiving the macro The first notification of changing the measurement mode sent by the cellular base station, and changing the currently used conventional measurement mode to the restricted measurement mode according to the first notification and the resource division of the femtocell.
  • the device is further configured to: after the device confirms leaving the coverage area of the interfering cellular base station, receive a second notification of a change measurement manner sent by the macrocell base station, and according to the second notification
  • the limited measurement method currently in use is changed to the conventional measurement method.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering cellular base station is a low power node that allows the UE to which the device belongs, and the device confirms entering the coverage area of the low power node, according to the low power
  • the node switches to the low power node via the first handover command message sent by the macro cell base station; and after the handover is completed, according to the resource segmentation condition of the macro cell base station included in the first handover command message, the current measurement mode is used. Change to restricted measurement mode.
  • the device is further configured to: after the device confirms leaving the coverage area of the low power node, switch back to the macro cell according to the second handover command message sent by the macro cell base station via the low power node, and after the handover is completed, Change the currently used limited measurement method to the regular measurement method.
  • the low power node is a picocellular base station or a femtocell base station that allows a UE to which the device belongs to access.
  • the UE when the UE is interfered by the interfering cellular base station, the UE only considers the radio signal quality of the serving cellular base station measured at the non-interfering subframe (ie, the subframe configured for the serving cellular base station), Therefore, it is possible to avoid the declaration of the wrong RLF, and thus the communication between the UE and the serving cellular base station is not interrupted, thereby improving the user experience.
  • the non-interfering subframe ie, the subframe configured for the serving cellular base station
  • 1 is a schematic diagram of respective coverage ranges of a macrocell base station and a low power node
  • FIG. 2 is a schematic diagram of interference of a UE accessing a macrocell base station by a femtocell
  • FIG. 3 is a schematic diagram of interference of a UE accessing a picocell base station by a macrocell base station
  • FIG. 4 is a diagram of an interfering cellular base station and a victim cellular base station.
  • FIG. 5 is a schematic structural diagram of a subframe in a frequency division multiplexing (FDD) mode in an LTE system
  • FIG. 6 is a schematic flowchart of measuring radio signal quality according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of measuring wireless signal quality according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic flowchart of measuring wireless signal quality according to Embodiment 3 of the present invention
  • FIG. 10 is a comparison chart of RSRP of a macrocell base station and RSRP of a femtocell base station according to the present invention
  • Figure 11 is a comparison diagram of RSRP of a macrocell base station and RSRP of a picocell base station according to the present invention. detailed description
  • the basic idea of the present invention is: When the UE is interfered to a certain degree by the interfering cellular base station, the UE ignores the service measured at the interfered subframe when measuring the radio signal quality of the serving cellular base station according to the resource partitioning condition of the interfering cellular base station.
  • the radio signal quality of the cellular base station only considers the radio signal quality of the serving cellular base station measured at the non-interfering subframe; wherein, the non-interfering subframe refers to the subframe configured for the serving cellular base station, and the remaining subframes are interfered. frame.
  • the conventional measurement mode means that the quality of the wireless signal at each subframe is likely to be measured by the UE, and
  • the UE considers the radio signal quality of the serving cellular base station measured at each subframe, that is, the measurement method used in the prior art
  • the limited measurement mode refers to the UE ignoring the interferer when measuring the radio signal quality of the serving cellular base station.
  • the wireless signal quality of the serving cellular base station measured at the frame only the wireless signal quality of the serving cellular base station measured at the non-interfering subframe is considered.
  • comparing the radio signal quality of the macro cell base station and the neighboring cell base station can be implemented by comparing the reference signal received power (RSRP), or the reference signal received quality (RSRQ), and the like of the two.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • the application scenarios of the first embodiment and the second embodiment are: coverage of the UE traversing the femtocell base station The process of the circumference.
  • the UE does not allow access to the femtocell, and the UE actively changes the measurement mode.
  • the method for measuring wireless signal quality in Embodiment 1 includes:
  • Step 601 The UE receives a system message (SI, system information) broadcast by the macro cell, where the system message includes the following: a physical cell identifier (PCI, physical cell identity) reserved for the femtocell;
  • SI system information
  • PCI physical cell identifier
  • the system message of the macro cell base station may further include a resource splitting condition of the femtocell base station, that is, which subframes the femtocell base station uses;
  • the UE may receive the system message in an IDLE state or a CONNECTED state.
  • the resource partitioning condition of the femtocell is obtained in advance by the macrocell base station from Operation Management and Maintenance (OAM);
  • Step 602 When the UE accesses the macro cell base station, the UE receives a measurement configuration message sent by the macro cell base station, where the measurement configuration includes the following content: when the wireless signal quality of the neighboring cell base station is higher than that of the macro cell base station After the wireless signal quality is higher than the predetermined first threshold and continues for a predetermined first time period, the measurement event is triggered and the measurement mode is changed; when the wireless signal quality of the adjacent cellular base station is lower than the predetermined wireless signal quality of the macro cellular base station After the second threshold value continues for a predefined second time period, the leaving event is triggered and the measurement mode is changed; in this embodiment, the macro cell is the service cell;
  • Step 603 In the measurement process, when the measured wireless signal quality of the neighboring cellular base station is higher than the wireless signal quality of the macro cellular base station by a predetermined first threshold value for a predetermined first time period, the measurement event is triggered. And the UE reports the measurement event to the macro cell base station by sending a first measurement report; the first measurement report includes at least the neighboring cell base Station PCI;
  • the measurement event is triggered at point B (ie, point B in FIG. 2);
  • Step 604 when the UE confirms that the PCI of the neighboring cellular base station is included in the PCI received from the macrocell base station, and knows that the neighboring cellular base station is a femtocell, automatically acquires the system message of the femtocell.
  • the UE learns that the femtocell does not allow itself to access. Then, the UE automatically changes the measurement mode to the limited measurement mode according to the resource segmentation situation received from the macro cell base station or obtained from the system message of the femtocell, and the measurement mode is the conventional measurement before the limited measurement mode is used. the way;
  • the macrocell base station learns that the neighboring cellular base station is a femtocell base station through the PCI in the first measurement report, and has not received the proximity indication sent by the UE before, the macrocell base station knows that the UE does not allow Accessing the femtocell, the macrocell base station scheduling the UE on a subframe that is not used by the femtocell;
  • Step 605 After detecting that the wireless signal quality of the femtocell is lower than the predetermined second threshold of the macrocell base station and continues for a predefined second period of time, triggering the leaving event, the UE sends the first The second measurement report reports the leaving event to the macrocell base station, and automatically changes the measurement mode to start using the conventional measurement mode. Specifically, the radio signal quality at each subframe is likely to be measured by the UE.
  • Measuring the wireless signal quality of the femtocell base station compared to the wireless signal quality of the macrocell base station A second time period below the predetermined second threshold and continuing for a predetermined period of time indicates that the UE is leaving the coverage of the femtocell; this is also one way for the UE to confirm its departure from the coverage of the femtocell.
  • the exit event is triggered at point C (i.e., point C in Figure 2).
  • the UE does not allow access to the femtocell, and the macrocell controls the UE to change the measurement mode.
  • the method for measuring wireless signal quality in Embodiment 2 includes:
  • Step 701 When the UE accesses the macro cell base station, the UE receives the measurement configuration message sent by the macro cell base station.
  • the content of the measurement configuration includes: when the radio signal quality of the neighboring cell base station is higher than the radio signal quality of the macro cell base station. a first threshold value and continuing for a predetermined first time period, triggering a measurement event; when a wireless signal quality of a neighboring cellular base station is lower than a predetermined second threshold value of the macro cellular base station and continuing to be predefined After the second period of time, the exit event is triggered;
  • the measurement configuration message in the second embodiment is different from that in the first embodiment. Because the measurement configuration content in the two messages is different, in the first embodiment, the serving cellular base station needs to tell the UE about the trigger condition of the measurement mode change. It may also include the case of resource segmentation of the femto cell, and the decision to change the measurement mode in the embodiment is performed by the serving cellular base station, so the measurement configuration message in the second embodiment is only a common measurement configuration message;
  • Step 702 After measuring that the wireless signal quality of the neighboring cellular base station is higher than the wireless signal quality of the macro cellular base station by a predetermined first threshold value for a predetermined first time period, the measurement event is triggered, and the UE sends the first a measurement report is reported to the macro cell base station; the first measurement report includes at least the PCI of the neighboring cell base station;
  • Step 703 The macro cell base station learns that the neighboring cell base station is a femto cell base station by using the PCI in the first measurement report, and does not receive the proximity indication sent by the UE before, the macro cell base station learns The UE does not allow access to the femtocell, and the macrocell base station notifies the UE to change the measurement mode by sending dedicated signaling, such as a first RRC connection reconfiguration message, to the UE, the first RRC connection.
  • the reconfiguration message may further include a resource splitting condition of the femtocell base station;
  • Step 704 The UE changes the measurement mode according to the received resource splitting condition of the femtocell, and starts to use the limited measurement mode. Specifically, the UE ignores the wireless measured at the subframe used by the femtocell. Signal quality;
  • Step 705 When the wireless signal quality of the femtocell is measured to be lower than the predetermined second threshold, the UE triggers the leaving event, and the UE reports the leaving event by sending the second measurement report. Giving a macro cell base station;
  • Step 706 After receiving the second measurement report and continuing for a predetermined second time period, the macro cell base station learns that the UE is about to leave the femtocell, and notifies the UE by sending dedicated signaling, such as a second RRC connection reconfiguration message, to the UE. Change the measurement method;
  • Step 707 After receiving the second RRC connection reconfiguration message, the UE changes the measurement mode and starts to use the regular measurement mode.
  • the system message (SI is sent to the UE) Obtaining a message to request the UE to acquire the SI of the femtocell, and the UE sends the obtained SI of the femtocell to the macrocell, and the macrocell knows that the femtocell does not allow according to the SI of the femtocell. UE access.
  • the UE allows access to the femtocell.
  • the method for measuring wireless signal quality in Embodiment 3 includes:
  • Step 801 When the UE accesses the macro cell base station, the UE receives the measurement sent by the macro cell base station. a configuration message, where the measurement configuration message is a normal measurement configuration message;
  • Step 802 When the UE is close to the femtocell that allows itself to access, according to the femto cell that has been recorded by itself, it can be known that the femtocell base station allows itself to access, and then sends a proximity indication to the macro cell;
  • Step 803 After measuring that the wireless signal quality of the femto cell is higher than a wireless signal quality of the macro cell base station by a predetermined first threshold value for a predetermined first time period, triggering a measurement event, and the UE sends the first
  • the measurement report reports the measurement event to the macrocell base station;
  • the first measurement report includes the PCI of the femtocell;
  • Step 804 The macro cell base station learns that the neighboring cell base station is a femto cell base station by using the PCI in the first measurement report, and also receives the proximity indication sent by the UE, and the macro cell base station learns that the UE can access the femto.
  • a cellular base station wherein the macro cellular base station sends a first handover request message to the femto cell;
  • the macrocell base station After the macrocell base station receives the first measurement report, if the macrocell base station needs to further confirm whether the femtocell base station allows the UE to access, it sends a system message acquisition (SI) message to the UE to request the UE to acquire the femtocell base station. SI, the UE sends the obtained SI of the femtocell to the macrocell, and the macrocell knows that the UE does allow access to the femtocell according to the SI of the femtocell;
  • SI system message acquisition
  • Step 805 After receiving the first handover request message, the femto cell sends a first handover command message to the UE to notify the UE to perform handover by using the macro cell, where the first handover command message includes the resource division of the macro cell, that is, the Which subframes are used by the macro cell;
  • the resource segmentation of the macro cell may be added by the macro cell or the femto cell in the first handover command message; the femto cell obtains the resource segmentation of the macro cell from the OAM in advance;
  • Step 806 The UE disconnects from the macro cell and accesses the femto cell according to the received first handover command message, and sends a first handover complete message to the femto cell; after the handover is completed, The UE changes the measurement mode to the restricted measurement mode according to the resource segmentation condition of the macro cell, that is, the UE ignores the quality of the wireless signal measured at the subframe used by the macro cell.
  • the femto cell becomes the serving cell, and the macro cell becomes the interfering cellular base station.
  • the method of measuring the wireless signal is similar to the steps 906 to 909 described later, and therefore will not be described herein.
  • the method for measuring the quality of the wireless signal in the fourth embodiment includes:
  • Step 901 When the UE accesses the macro cell base station, the UE receives the measurement configuration message sent by the macro cell base station, where the measurement configuration message is a common measurement configuration message.
  • Step 902 After measuring that the wireless signal quality of the neighboring cellular base station is higher than the wireless signal quality of the macro cellular base station by a predetermined first threshold value for a predetermined first time period, the measurement event is triggered, and the UE sends the first A measurement report reports the measurement event to the macrocell base station;
  • the measurement event is triggered at point B (ie, point B in Figure 3);
  • Step 903 According to the received first measurement report, the macro cell learns that the neighboring cell is a pico cell. Since each UE is allowed to access the pico cell, the UE can switch from the macro cell to the pico cell, when the macro cell determines When the UE is switched to the picocell, the macro cell sends a first handover request message to the pico cell.
  • Step 904 After receiving the first handover request message, according to the configuration of the OAM, the pico cell learns that it is located in the coverage of the macro cell, and sends a first handover command message to the UE to notify the UE by using the macro cell. And performing the handover, where the first handover command message includes the resource division of the macro cell, that is, which subframes are used by the macro cell; wherein the resource segmentation of the macro cell may be added by the macro cell or the pico cell. Switching command message; pico cell obtains resource partitioning of macro cell from OAM in advance Situation
  • Step 905 The UE disconnects from the macro cell and accesses the pico cell according to the received first handover command message, and sends a first handover complete message to the pico cell. After the handover is completed, the UE according to the macro cell
  • the pico cell becomes the monthly service cell
  • the macro cell becomes the interfering cellular base station.
  • the method for measuring the quality of the radio signal in the fourth embodiment includes:
  • Step 906 After detecting that the wireless signal quality of the pico cell is lower than the predetermined second threshold value and the predetermined second time period is continued for a predetermined second time period, the leaving event is triggered, and the UE sends the second measurement report. Reporting the departure event to the pico cell;
  • Step 907 According to the received second measurement report, the pico cell learns that the UE is about to leave its coverage, and needs to switch back to the macro cell, and the pico cell sends a second handover request message to the macro cell.
  • Step 908 The macro cell sends a second handover command message to the UE by using the pico cell according to the received second handover request message.
  • Step 909 The UE disconnects from the pico cell and accesses the macro cell according to the received second handover command message, and sends a second handover complete message to the macro cell. After the handover is completed, the UE changes the measurement mode, and starts to use the regular The measurement method, specifically, the quality of the wireless signal measured at each sub-frame is considered.
  • the pico cell After the UE switches back to the macro cell, the macro cell becomes the moon again.
  • the pico cell also needs to send a message to the UE to notify the UE of the resource segmentation of the interference cell, that is, the macro cell. Enable the UE to use the limited measurement mode immediately.
  • the message may be an RRC connection reconfiguration message, which includes a resource partitioning situation of the macro cell.
  • the present invention also provides a wireless signal quality measuring apparatus, which is located in a UE, and is configured to: when a UE is interfered by an interfering cellular base station, use a limited measurement mode.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering cellular base station is a femtocell base station that does not allow the UE to access, and when the device confirms entering the coverage area of the interfering cellular base station, according to the The resource splitting condition of the femtocell base station, and the notification sent by the macrocell base station to change the measurement mode after the device confirms the coverage area of the interfering cell base station, and changes the currently used conventional measurement mode to the limited measurement mode.
  • the device is further configured to: after the device confirms leaving the coverage area of the interfering cell base station, according to a notification sent by the macro cell base station in advance, when the device confirms to leave the coverage area of the interfering cell base station, the measurement mode is changed, and the current use is performed.
  • the limited measurement method is changed to the conventional measurement method.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering base station is a femtocell base station that does not allow the UE to access, and when the device confirms entering the coverage area of the interfering cellular base station, receiving the macro The first notification of changing the measurement mode sent by the cellular base station, and changing the currently used conventional measurement mode to the restricted measurement mode according to the first notification and the resource division of the femtocell.
  • the device is further configured to: after the device confirms to leave the coverage area of the interfering cell base station, receive a second notification of changing the measurement mode sent by the macro cell base station, and use the limited measurement mode currently used according to the second notification Change to the conventional measurement method.
  • the device is further configured to: when the serving cellular base station is a macro cellular base station, and the interfering cellular base station is a low power node that allows the UE to which the device belongs to access, and the device confirms entering the low power node. After the coverage area of the point, according to the first handover command message sent by the low power node via the macro cell base station, switching to the low power node; and after the handover is completed, according to the resources of the macro cell base station included in the first handover command message Split the situation and change the currently used general measurement mode to the limited measurement mode.
  • the device is further configured to: after the device confirms leaving the coverage area of the low power node, switch back to the macro cell according to the second handover command message sent by the macro cell base station via the low power node, and after the handover is completed, Change the currently used limited measurement method to the regular measurement method.
  • the low power node is a picocell base station or a femtocell base station that allows a UE to which the device belongs to access.

Abstract

La présente invention se rapporte à un procédé et à un appareil adaptés pour mesurer la qualité d'un signal radio. Le procédé selon l'invention comprend les étapes suivantes : quand un équipement d'utilisateur (UE, User Equipment) subit un brouillage de la part de la station de base dans une cellule brouilleuse, l'UE procède selon la manière de mesure limitée ; selon l'invention, procéder selon la manière de mesure limitée signifie que, quand la qualité du signal radio de la station de base dans la cellule de desserte est mesurée, en fonction de la situation de partage de ressource de la station de base dans la cellule brouilleuse, l'UE ignore la qualité du signal radio dans les sous-trames qui subissent le brouillage et ne prend en compte que la qualité du signal radio dans les sous-trames qui ne subissent pas le brouillage ; les sous-trames qui ne subissent pas le brouillage sont les sous-trames qui sont configurées de façon à être utilisées par la station de base dans la cellule de desserte, les autres sous-trames étant les sous-trames qui subissent le brouillage. Avec la présente invention, la déclaration erronée d'une rupture de la liaison radio peut être évitée.
PCT/CN2010/077548 2010-09-30 2010-09-30 Procédé et appareil adaptés pour mesurer la qualité d'un signal radio WO2012040940A1 (fr)

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CN114143811A (zh) * 2021-12-02 2022-03-04 郑州航空工业管理学院 基于机器学习的篮球投射过程中的角度智能视觉图像传输方法及系统

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CN101790858A (zh) * 2007-09-04 2010-07-28 Lm爱立信电话有限公司 时分双工系统中改进的信号质量测量
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CN114143811B (zh) * 2021-12-02 2023-07-28 郑州航空工业管理学院 基于机器学习的篮球投射过程中的角度智能视觉图像传输方法及系统

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