WO2012013100A1 - 一种用户设备及其上报rlf相关测量信息的方法 - Google Patents

一种用户设备及其上报rlf相关测量信息的方法 Download PDF

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Publication number
WO2012013100A1
WO2012013100A1 PCT/CN2011/075987 CN2011075987W WO2012013100A1 WO 2012013100 A1 WO2012013100 A1 WO 2012013100A1 CN 2011075987 W CN2011075987 W CN 2011075987W WO 2012013100 A1 WO2012013100 A1 WO 2012013100A1
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Prior art keywords
rlf
measurement information
related measurement
information
message
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PCT/CN2011/075987
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English (en)
French (fr)
Inventor
韩立锋
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中兴通讯股份有限公司
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Publication of WO2012013100A1 publication Critical patent/WO2012013100A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1848Time-out mechanisms
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092Error control systems characterised by the topology of the transmission link
    • H04L2001/0093Point-to-multipoint

Definitions

  • the present invention relates to the field of communications, and in particular, to a user equipment and a method for reporting radio link failure (RLF) related measurement information.
  • RLF radio link failure
  • a Long Term Evolution (LTE) network is composed of an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC).
  • the network is flattened.
  • the E-UTRAN is connected to the EPC through an SI interface, where the E-UTRAN is composed of a plurality of interconnected evolved base stations (eNBs, Evolved NodeBs), and each eNB is connected through an X2 interface; the EPC is composed of a mobility management entity (MME, Mobility). Management Entity ) and Service Gateway Entity (S-GW, Serving Gateway).
  • MME mobility management entity
  • Management Entity Management Entity
  • S-GW Service Gateway Entity
  • the connection of the UE may be abnormal.
  • the radio link failure may occur in the UE (RLF, Radio Link Failure). , thereby affecting the normal service of the UE.
  • RLF Radio Link Failure
  • the improper handover parameters in the LTE network may also cause the UE to generate RLF.
  • the serving cell may switch the UE to a neighboring area with a bad signal, causing the UE to generate RLF in the neighboring area.
  • the MRO can discover the current mobility parameters according to the behavior of the UE's RLF. For example, as shown in FIG.
  • the UE in cell 1 (belonging to eNB1) has RLF, and finally the UE selects cell 2 (belongs to eNB2) to initiate re-establishment, then
  • the eNB2 immediately sends an RLF indication (RLF Indication) to the eNB1 according to the UE's reestablishment message, with the UE's identification information, such as the UE's Cell-Radio Network Temporary Identifier (C-RNTI) and the message.
  • Check value (ShortMAC-I).
  • the eNB1 finds the context of the UE according to the identifier information of the UE after receiving the RLF Indication, it indicates that the RLF of the previous UE is caused by the cell 1 not switching to the cell 2 in time, that is, the UE is found to be in the cell 1. If the handover is too late, the network side can also adjust the handover parameters appropriately to avoid this situation.
  • the coverage vulnerability may also cause the UE to generate RLF, which may cause the network side to incorrectly determine the cause of the RLF.
  • RLF radio frequency
  • one method is to let the UE record the measurement result of the serving cell before the occurrence of the RLF and the surrounding cell with the best signal quality, and also record that the UE initiates the reconstruction later.
  • the measurement result of the measured serving cell and the surrounding cell with the best signal quality may also record the location information of the UE.
  • the UE When the UE sends a radio resource control (RRC, Radio Resources Control) re-establishment (RRC Connection Reestablishment Complete) message, it carries an indication message, and informs the network side that the UE stores RLF-related measurement information, that is, the foregoing serving cell and The measurement result of the surrounding cell with the best signal quality, or the location information of the UE.
  • RRC Radio Resource Control
  • the network side may notify the UE of the measurement information related to the RLF by sending a UE Information Request message, and the UE may save the RLF through the UE Information Response message.
  • the related measurement information is reported to the network side, and the network side determines whether there is a coverage vulnerability based on the related information. For example: If the signal of the serving cell and the surrounding cell with the best signal quality is very poor, then there is a coverage vulnerability here. Otherwise, the description may be that the setting of the switching parameter is unreasonable.
  • the UE may report the indication information of the RLF-related measurement information by using the RRC setup complete message in the next RRC setup process.
  • the network side can pass The UE information request message is sent to notify the UE to report the RLF-related measurement information.
  • the UE may use the UE Information Response message to send the RLF-related measurement information to the network side, and the network side determines whether there is coverage according to the RLF-related measurement information. Vulnerabilities.
  • the UE After the UE does not support the indication of the RLF-related measurement information, the UE does not send a command to notify the UE to report the RLF-related measurement information. The UE may need to keep the RLF all the time. The related measurement information is then reported in the air interface signaling, and the indication information of the RLF related measurement information is reported, which causes waste of air interface signaling and waste of UE memory space. In addition, after the UE reports the RLF-related measurement information, the network may no longer need the information, which may result in waste of air interface signaling and waste of UE memory space. Summary of the invention
  • the main object of the present invention is to provide a user equipment and a method for reporting the related information of the RLF, so as to solve the problem that the prior art is easy to cause air interface signaling waste and waste of UE memory space.
  • the present invention provides a method for a user equipment (UE) to report radio link failure (RLF) related measurement information, the method comprising:
  • the UE When the RLF occurs, the UE records the RLF-related measurement information, and after the recording is completed, starts a timer for saving the RLF-related measurement information, and the UE saves the RLF-related measurement information only in the timer time, and the timer is The indication information of the RLF related measurement information is sent to the network side in time.
  • the UE sends the indication information of the RLF related measurement information to the network side by using an RRC re-establishment complete message, an RRC setup complete message, or an RRC reconfiguration complete message.
  • the dedicated message is: an RRC reconfiguration message, an RRC connection setup message, or an RRC connection re-establishment message.
  • the method further includes: if the timer for saving the RLF related measurement information times out, the UE no longer saves the RLF related measurement information, and does not send the indication information of the RLF related measurement information.
  • the network side includes: a base station or a radio network controller.
  • the present invention also provides a UE, including:
  • a timer value extraction module configured to receive a broadcast message or a dedicated message sent by a network side of the cell to which the cell belongs, and extract a timer value of the RLF related measurement information in the message;
  • An information processing module configured to record RLF related measurement information when the RLF occurs in the UE, and start a timer for saving RLF related measurement information after the recording is completed, and save the RLF related measurement information only in the timer time, and The indication information of the RLF related measurement information is sent to the network side in the timer time.
  • the information processing module is further configured to send the indication information of the RLF-related measurement information to the network side by using an RRC re-establishment complete message, an RRC setup complete message, or an RRC reconfiguration complete message.
  • the dedicated message is: an RRC reconfiguration message, an RRC connection setup message, or an RRC connection re-establishment message.
  • the information processing module is further configured to: when the timer of the RLF-related measurement information is saved, the RLF-related measurement information is no longer saved, and the indication information of the RLF-related measurement information is no longer sent.
  • the network side includes: a base station or a radio network controller.
  • the user equipment and the method for reporting the RLF related measurement information are provided by the UE, and the cell in which the RLF occurs in the UE sends a timer value for storing the RLF related measurement information by using a broadcast or a dedicated message, and the UE records the RLF related measurement information. Afterwards, the timer for saving the information is turned on; the UE saves the RLF related measurement information only during the timer time, and at the timer time The indication information of the RLF related measurement information is sent to the network side.
  • the UE can effectively save the RLF-related measurement information and report the indication information of the RLF-related measurement information, and the network side can obtain the RLF-related measurement information, and effectively distinguish the mobility-related parameters according to the RLF-related measurement information reported by the UE.
  • the RLF problem provides more accurate input for mobile robustness optimization, thereby improving the performance of the network.
  • the UE does not need to keep the RLF-related measurement information all the time, but saves the RLF-related measurement information and sends the RLF related information in the timer time.
  • the indication information of the measurement information which also reduces the overhead of air interface signaling and UE memory.
  • FIG. 1 is a schematic diagram of an LTE network architecture in the prior art
  • FIG. 2 is a schematic diagram of a method for reporting RLF related measurement information by a user equipment according to the disclosure
  • FIG. 3 is a flowchart of a method for reporting RLF related measurement information by a user equipment according to the present invention
  • a schematic diagram of the timer value of the measurement information
  • FIG. 5 is a schematic diagram of a timer value for transmitting, by using a dedicated message, a RLF-related measurement information by a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a UE performing RLF in a cell 1 and performing RRC re-establishment in a cell 2 according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a UE transmitting an RLF in cell 1 and performing RRC re-establishment failure in cell 2, reselecting to cell 3, and performing RRC re-establishment success according to an embodiment of the present invention.
  • a method for reporting RLF related measurement information by a UE is provided by the present invention. As shown in FIG. 3, the method mainly includes the following steps:
  • Step 301 The UE receives a broadcast message or a dedicated message sent by the network side of the cell to which the cell belongs, and The timer value of the RLF related measurement information in the message is extracted.
  • the base station (eNB) located on the network side of the cell to which the UE belongs may send a timer value for storing the RLF-related measurement information to the UE of the cell by means of a broadcast message, as shown in FIG. 4; of course, the base station may also use a dedicated message.
  • the timer value for storing the RLF related measurement information is sent to the UE of the cell, as shown in FIG. 5.
  • Step 302 The UE records the RLF related measurement information when the RLF occurs, and starts a timer for saving the RLF related measurement information after the recording is completed, and the UE saves the RLF related measurement information only during the timer time, and the timer time is The indication information of the RLF related measurement information is sent to the network side.
  • the UE Since the UE does not need to keep the RLF-related measurement information all the time, but only saves the RLF-related measurement information and the indication information of the RLF-related measurement information in the timer time, the air interface signaling and the UE memory overhead are also reduced.
  • the base station sends a timer value for storing the RLF-related measurement information by using a broadcast message
  • the application scenario that the UE generates the RLF in the cell (Cell) 1 and performs the RRC re-establishment in the Cell 2 is shown in FIG.
  • the specific operations include:
  • the UE is camped on in the Cell 1 of the base station 1.
  • the Cell 1 sends a timer value of the RLF-related measurement information to the UE by using the broadcast message.
  • the timer value indicates that the base station 1 detects that the UE in the Cell 1 has the RLF, and then saves the The time of the context information of the UE.
  • the timer value can be broadcast in System Information Block Type 2 (SIB2, System Information Block Type2), and the UE obtains the timer value by reading a broadcast message.
  • SIB2 System Information Block Type 2
  • the UE performs the RRC re-establishment process in the cell 2 under the control of the base station 2 according to the cell selection process, and the UE records the serving cell and the signal quality before the occurrence of the RLF. Measurement results of surrounding neighborhoods (signal quality Measurement), it is also possible to record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and also record the location information of the UE. After the recording is completed, the UE starts a timer for saving the RLF related measurement information. The UE carries the indication information of the RLF related measurement information in the RRC Connection Reestablishment Complete message, and informs the base station 2 that the UE saves the RLF related measurement information.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the base station 2 After receiving the RRC Connection Reestablishment Complete message of the UE and obtaining the indication information of the RLF-related measurement information in the message, the base station 2 does not support the acquisition of the RLF-related measurement information, or the signaling load of the air interface is heavy. For example, the base station 2 does not send a command to the UE to obtain the RLF-related measurement information, that is, the base station 2 does not send a UE Information Request message for obtaining the RLF-related measurement information to the UE.
  • the UE continues to save the RLF-related measurement information, and may send the indication information of the RLF-related measurement information to the base station 2 by using an uplink message, for example, the RRC re-establishment completion message may be The RRC setup complete message, the RRC reconfiguration complete message, or other uplink message transmission.
  • the base station 2 may send a UE Information Request message to the UE according to its own load and in combination with its own algorithm, and then the UE may report the RLF-related measurement information, and the UE may use the UE Information Response message to set the RLF.
  • the relevant measurement information is given to the base station 2. If the timer for storing the RLF-related measurement information expires, the UE does not save the measurement information related to the RLF, and does not send the indication information of the RLF-related measurement information.
  • the base station sends a timer value for storing the RLF-related measurement information by using a dedicated message
  • FIG. Operations include:
  • the UE resides in the Cell 1 under the control of the base station 1.
  • the Cell 1 sends a timer value for storing the RLF-related measurement information through a dedicated message, for example, may be established through an RRC Reconfiguration (RRC Connection Reconfiguration) message or an RRC connection (RRC Connection). Setup)
  • the message, or RRC Connection Reestablishment message, or other downstream message sends the timer value.
  • the timer value indicates the time when the base station 1 detects the context information of the UE after the RLF of the UE in the cell 1 is detected.
  • the UE can obtain the timer value by reading the dedicated message described above.
  • the UE performs the RRC re-establishment process in the cell 2 under the control of the base station 2 according to the cell selection process, and the UE records the serving cell and the signal quality before the occurrence of the RLF.
  • the measurement result of the surrounding neighboring area can also record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and can also record the location information of the UE.
  • the UE starts a timer for saving the RLF related measurement information.
  • the UE carries the indication information of the RLF related measurement information in the RRC Connection Reestablishment Complete message, and informs the base station 2 that the UE saves the measurement information related to the RLF.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the base station 2 After receiving the RRC Connection Reestablishment Complete message of the UE and obtaining the indication information of the RLF-related measurement information in the message, the base station 2 does not support the acquisition of the RLF-related measurement information, or the signaling load of the air interface is heavy. For other reasons, the base station 2 does not initiate a command to obtain the RLF related measurement information to the UE. That is, the base station 2 does not send a UE Information Request message for obtaining the RLF related measurement information to the UE.
  • the UE continues to save the RLF-related measurement information, and may send the RLF-related measurement information to the base station 2 through the uplink message.
  • the information may be, for example, an RRC re-establishment complete message, an RRC setup complete message, an RRC reconfiguration complete message, or other uplink message transmission.
  • the base station 2 may send a UE Information Request message to the UE according to its own load and in combination with its own algorithm, and then the UE may report the RLF-related measurement information, and the UE may use the UE Information Response message to set the RLF.
  • the relevant measurement information is given to the base station 2. If the timer for saving the RLF-related measurement information expires, the UE does not save the RLF-related measurement information, and does not send the indication information of the RLF-related measurement information.
  • the base station sends a timer value for storing the RLF-related measurement information by using a broadcast message.
  • the UE sends the RLF in Cell 1 and fails to perform RRC re-establishment in Cell 2, and then reselects to the Cell.
  • the application scenario in which the RRC establishment is successful is performed in the following, and the specific operations include:
  • the UE is camped on in the Cell 1 of the base station 1.
  • the Cell 1 sends a timer value for the UE to save the RLF-related measurement information by using a broadcast message.
  • the timer value can be used to indicate that the base station 1 detects that the UE in the Cell 1 has an RLF.
  • the time at which the UE's context information is then saved.
  • the timer value can be broadcast in SIB2, and the UE can acquire the timer by reading the broadcast message.
  • the UE performs the RRC re-establishment process in the cell 2 under the control of the base station 2 according to the cell selection process, and the UE records the serving cell and the signal quality before the occurrence of the RLF.
  • the measurement result (signal quality measurement) of the surrounding neighboring area may also record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and may also record the location information of the UE. After the recording is completed, the UE starts a timer for saving the RLF related measurement information.
  • the RRC re-establishment of the UE fails, and the UE transits to the idle state.
  • the UE selects an RRC setup request in the Cell 3 managed by the base station 3 through cell reselection, and the RRC establishment of the UE is successfully transferred. Connection state. If the timer for storing the RLF related measurement information does not time out, the UE continues to save the RLF related measurement information, and the UE may be in the RRC Connection Setup.
  • the Complete message carries the indication information of the RLF-related measurement information, and informs the base station 3 that the UE stores the RLF-related measurement information.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the base station 3 may send a UE Information Request message to the UE, and the UE may report the RLF-related measurement information, and the UE may pass the UE.
  • the Information Response message sends the RLF-related measurement information to the base station 3.
  • the base station 3 does not issue a command to the UE to obtain the RLF-related measurement information, that is, the base station 3
  • the UE Information Request message for obtaining the RLF related measurement information is not sent to the UE.
  • the UE continues to save the RLF-related measurement information, and may send the indication information of the RLF-related measurement information to the base station 3 through the uplink message, for example, may be completed by RRC re-establishment.
  • the base station 3 may send a UE Information Request message to the UE according to the load situation of the UE and the UE, and the UE may report the RLF-related measurement information by using the UE Information Response message.
  • the relevant measurement information is given to the base station 3. If the timer for saving the RLF-related measurement information expires, the UE does not save the measurement information related to the RLF, and does not send the indication information of the RLF-related measurement information.
  • the base station sends a timer value for storing RLF related measurement information by using a dedicated message.
  • the UE sends an RLF in Cell 1 and fails to perform RRC reestablishment in Cell 2, and then reselects to the Cell.
  • the application scenario in which the RRC establishment is successful is performed in the following, and the specific operations include:
  • the UE resides in the Cell 1 of the base station 1.
  • the Cell 1 sends a timer value for the UE to save the RLF related measurement information by using a dedicated message, for example, by using an RRC Connection Reconfiguration message, or an RRC Connection Setup message, or an RRC Connection Reestablishment message. , or other downstream messages send the timer value.
  • the timer value indicates the time when the base station 1 detects the context information of the UE after the RLF of the UE in the cell 1 is detected.
  • the UE performs the RRC re-establishment process in the cell 2 under the control of the base station 2 according to the cell selection process, and the UE records the serving cell and the signal quality before the occurrence of the RLF.
  • the measurement result of the surrounding neighboring area may also record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and may also record the location information of the UE. After the recording is completed, the UE starts a timer for saving the RLF related measurement information.
  • the RRC re-establishment of the UE fails, the UE transits to the idle state, and the UE selects the Cell 3 under the jurisdiction of the base station 3 to perform an RRC setup request, and the RRC establishment of the UE successfully transits to the connected state. If the timer for saving the RLF-related measurement information does not expire, the UE continues to save the RLF-related measurement information, and the UE may carry the indication information of the RLF-related measurement information in the RRC Connection Setup Complete message, and notify the base station 3 that the UE stores the RLF-related information. Measurement information.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the base station 3 may send a UE Information Request message to the UE, and the UE may report the RLF-related measurement information, and the UE may pass the UE.
  • the Information Response message sends the RLF-related measurement information to the base station 3. If the version of the base station 3 does not support the acquisition of the RLF-related measurement information, or the signaling load of the air interface is heavy, or other reasons, the base station 3 does not issue a command to the UE to obtain the RLF-related measurement information, that is, the base station 3
  • the UE Information Request message for obtaining the RLF related measurement information is not sent to the UE.
  • the UE continues to save the RLF-related measurement information, and may send the indication information of the RLF-related measurement information to the base station 3 through the uplink message, for example, may be completed by RRC re-establishment.
  • the base station 3 may send a UE Information Request message to the UE according to the load situation of the UE and the UE, and the UE may report the RLF-related measurement information by using the UE Information Response message.
  • the relevant measurement information is given to the base station 3. If the timer for saving the RLF-related measurement information expires, the UE does not save the RLF-related measurement information, and does not send the indication information of the RLF-related measurement information.
  • the fifth embodiment of the present invention relates to an application in a Universal Mobile Telecommunications System (UMTS).
  • UMTS Universal Mobile Telecommunications System
  • the network side sends a timer value for storing RLF related measurement information by using a broadcast message, and the specific operations include:
  • the UE resides in the Cell 1 of the Radio Network Controller (RNC).
  • the Cell 1 sends a timer value of the RLF-related measurement information to the UE through a broadcast message.
  • the timer value indicates that the RNC 1 detects the Cell.
  • the time when the UE in 1 is saved after the RLF saves the context information of the UE.
  • the timer can be broadcast in SIB1, and the UE acquires the timer by reading a broadcast message.
  • the UE selects the Cell 2 under the network element 2 to perform the RRC re-establishment process according to the cell selection process, and the UE records the serving cell and the signal quality before the RLF occurs.
  • the measurement result of the surrounding neighboring area can also record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and can also record the location information of the UE. After the recording is completed, The UE starts a timer for saving RLF related measurement information.
  • the RRC setup complete message, or the Radio Bearer Reconfiguration Complete message, or the Transport Channel Reconfiguration Complete message, or the physical channel reconfiguration redundancy ( Physical Channel Reconfiguration Complete).
  • the message, or other uplink message carries the indication information of the RLF-related measurement information, and the network element 2 may request the UE to report the RLF-related measurement information. If the timer expires, the UE does not save the measurement information related to the RLF, and the indication information of the RLF related measurement information is not carried in the message.
  • the UE transits to the idle state, and the UE selects the Cell 3 in the cell 3 to perform the RRC setup request, and the RRC establishment of the UE successfully transits to the connected state. If the timer for saving the RLF-related measurement information does not expire, the UE saves the RLF-related measurement information, and the UE may carry the indication information of the RLF-related measurement information in the RRC Connection Setup Complete or other uplink message, and notify the network element 3 that the UE saves the RLF-related information. Measurement information.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the network element 3 may send a UE Information Request message to the UE, and the UE may report the RLF-related measurement information, and the UE may pass the UE.
  • the UE Information Response message reports the measurement information related to the RLF to the network element 3.
  • the network element 3 does not issue a command for obtaining the RLF-related measurement information to the UE, that is, the network.
  • Element 3 does not send a UE Information Request message to the UE to obtain RLF related measurement information.
  • the UE continues to save the RLF-related measurement information, and can send the indication information of the RLF-related measurement information to the network element 3 through the uplink message, for example, the RRC re-establishment completion message, the RRC setup complete message, and the RRC reconfiguration can be completed.
  • a message or other upstream message is sent.
  • the network element 3 may send a UE Information Request message to the UE according to its own load condition and in combination with its own algorithm, and the UE may report the RLF-related measurement information, and the UE may use the UE Information Response message.
  • the measurement information related to the RLF is given to the network element 3. If the timer for saving the RLF-related measurement information expires, the UE does not save the RLF-related measurement information, and does not send the indication information of the RLF-related measurement information.
  • the above network element refers to a base station (eNB) in an LTE system or an RNC in a UMTS.
  • eNB base station
  • RNC Radio Network Controller
  • the sixth embodiment of the present invention relates to the application in the UMTS.
  • the network side sends a timer value for storing the RLF related measurement information by using a dedicated message, and the specific operations include:
  • the UE is camped on in the cell 1 of the base station manager 1, and the cell 1 sends a timer value for storing the RLF related measurement information by the UE through a dedicated message, for example, it can be established through a Cell Update Confirm message or an RRC connection. (RRC Connection Setup) message, or Radio Bearer Reconfiguration message, or Transport Channel Reconfiguration message, or Physical Channel Reconfiguration message, or other downstream message to send the timer value.
  • the timer value indicates the time when the RNC 1 detects that the UE in the Cell 1 has saved the context information of the UE after the RLF has occurred.
  • the UE selects the Cell 2 under the network element 2 to perform the RRC re-establishment process according to the cell selection process, and the UE records the serving cell and the signal quality before the RLF occurs.
  • the measurement result of the surrounding neighboring area can also record the measurement result of the serving cell and the surrounding neighboring area with the best signal quality measured by the UE when the reconstruction is subsequently initiated, and can also record the location information of the UE. After the recording is completed, the UE starts a timer for saving the RLF related measurement information.
  • the network element 2 may request the UE to report the RLF related information. Measurement information. If the timer expires, the UE does not save the measurement information related to the RLF, and the indication information of the RLF related measurement information is not carried in the message.
  • the UE transits to the idle state, and the UE selects the Cell 3 in the cell 3 to perform the RRC setup request, and the RRC establishment of the UE successfully transits to the connected state. If the timer for saving the RLF-related measurement information does not expire, the UE saves the RLF-related measurement information, and the UE may carry the indication information of the RLF-related measurement information in the RRC Connection Setup Complete or other uplink message, and notify the network element 3 that the UE saves the RLF-related information. Measurement information.
  • the RLF-related measurement information includes at least one of the following: a measurement result of a serving cell before the RLF occurs and a surrounding neighboring cell with the best signal quality, a serving cell measured by the UE when the re-establishment is subsequently initiated, and a neighboring neighbor with the best signal quality.
  • the measurement result of the area may also include location information of the UE.
  • the network element 3 may send a UE Information Request message to the UE, and the UE may report the RLF-related measurement information, and the UE may pass the UE.
  • the UE Information Response message reports the measurement information related to the RLF to the network element 3.
  • the network element 3 does not issue a command for obtaining the RLF-related measurement information to the UE, that is, the network.
  • Element 3 does not send a UE Information Request message to the UE to obtain RLF related measurement information.
  • the UE continues to save the RLF-related measurement information, and may send the indication information of the RLF-related measurement information to the network element 3 through the uplink message, for example, may be re-established through RRC.
  • the network element 3 may send a UE Information Request message to the UE according to its own load condition and in combination with its own algorithm, and the UE may report the RLF-related measurement information, and the UE may use the UE Information Response message.
  • the measurement information related to the RLF is given to the network element 3. If the timer for saving the RLF-related measurement information expires, the UE does not save the RLF-related measurement information, and does not send the indication information of the RLF-related measurement information.
  • the above network element refers to a base station (eNB) in an LTE system or an RNC in a UMTS.
  • eNB base station
  • RNC Radio Network Controller
  • the present invention further provides a UE, including: a timer value extraction module and an information processing module, corresponding to the foregoing method for the UE to report the RLF related measurement information.
  • the timer value extraction module is configured to receive a broadcast message or a dedicated message sent by the network side of the cell to which the cell belongs, and extract a timer value of the RLF-related measurement information in the message.
  • the information processing module is configured to: when the RLF occurs in the UE, record the RLF related measurement information, and start a timer for saving the RLF related measurement information after the recording is completed, and save the RLF related measurement information only during the timer time, and at the timing
  • the indication information of the RLF related measurement information is sent to the network side in the device time.
  • the information processing module may send the indication information of the RLF related measurement information to the network side by using an RRC reestablishment complete message, an RRC setup complete message, an RRC reconfiguration complete message or other uplink message.
  • the information processing module does not save the RLF-related measurement information when the timer for storing the RLF-related measurement information expires, and does not send the indication information of the RLF-related measurement information.
  • the UE can effectively save the RLF-related measurement information and report the indication information of the RLF-related measurement information, and the network side can obtain the RLF-related measurement information, and effectively distinguish the RLF-related measurement information reported by the UE.
  • the RLF problem caused by the mobility parameter provides more accurate input for mobile robustness optimization, thereby improving the performance of the network.
  • the UE does not need to keep the RLF-related measurement information all the time, but saves the RLF-related measurement in the timer time.
  • Information and instructions for sending RLF-related measurement information which also reduces air traffic information The cost of the memory with the UE.

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Description

一种用户设备及其上报 RLF相关测量信息的方法 技术领域
本发明涉及通信领域, 尤其涉及一种用户设备及其上报无线链路失败 ( RLF )相关测量信息的方法。 背景技术
如图 1所示, 长期演进(LTE, Long Term Evolution ) 网络由演进全球 陆地无线接入网 (E-UTRAN, Evolved Universal Terrestrial Radio Access Network )和演进分组交换中心(EPC, Evolved Packet Core )组成, 网络呈 现扁平化。 E-UTRAN通过 SI接口与 EPC相连, 其中, E-UTRAN由多个 相互连接的演进基站 (eNB, Evolved NodeB )组成, 各个 eNB之间通过 X2接口连接; EPC由移动性管理实体( MME, Mobility Management Entity ) 和服务网关实体 ( S-GW, Serving Gateway )组成。
在 LTE中由于无线环境或者用户设备 ( UE, User Equipment )在网络 覆盖区域的移动等因素影响,可能会引起 UE的连接发生异常, 比如可能导 致 UE发生无线链路失败 ( RLF, Radio Link Failure ), 从而影响 UE的正常 业务。 为了避免这种情况, 需要尽快检测导致 RLF的原因, 比如是否覆盖 区域内存在如图 2所示的覆盖漏洞。 而在 LTE网络中不当的切换参数也会 导致 UE发生 RLF,比如服务小区可能会将 UE切换到一个信号不好的邻区 导致 UE在邻区发生了 RLF, 为了优化这种情况, 在 LTE的自组织网络功 能( SON, Self-Organizing Network )中就提出了移动性鲁莽性优化( MRO, Mobility Robustness Optimization ), MRO可以才艮据 UE发生 RLF的行为发 现当前移动性参数存在的问题。例如:如图 2所示,处在小区 1 (属于 eNBl ) 中的 UE发生了 RLF, 最终 UE选择小区 2 (属于 eNB2 )发起了重建, 则 eNB2 会根据 UE 的重建消息向 eNBl 立即发送一个 RLF 指示 ( RLF Indication ), 其中带有 UE 的标识信息, 如 UE 的小区无线网络临时标识 ( C-RNTI , Cell-Radio Network Temporary Identifier ) 和以及消息校验值 ( ShortMAC-I )。 如果 eNBl在收到 RLF Indication后, 根据 UE的标识信 息找到了该 UE的上下文, 则说明此前 UE的 RLF是因为小区 1没有及时 将其切换到小区 2所致, 即发现了 UE在小区 1发生了切换过晚的情况,此 时网络侧也可以适当调整切换参数以规避这种情况。
如前面所述, 由于覆盖漏洞也可能会导致 UE发生 RLF, 这就可能会 导致网络侧无法正确判断导致 RLF的原因。 为了及时发现覆盖漏洞的问题 或者发现切换参数不当的问题, 一种方法是让 UE记录在发生 RLF之前的 服务小区以及信号质量最好的周围小区的测量结果,还可以记录 UE在随后 发起重建时所测量的服务小区以及信号质量最好的周围小区的测量结果, 还可记录 UE的位置信息。在 UE发送无线资源控制( RRC, Radio Resources Control )重建立完成 ( RRC Connection Reestablishment Complete ) 消息时 , 携带一个指示信息, 告知网络侧该 UE保存有 RLF相关的测量信息, 也就 是上述的服务小区以及信号质量最好的周围小区的测量结果, 或者还包含 UE的位置信息。网络侧收到该指示信息后,可以通过下发 UE信息请求(UE Information Request ) 消息, 通知 UE上^艮 RLF相关的测量信息, UE可以 通过 UE信息响应( UE Information Response )消息将保存的 RLF相关的测 量信息上报至网络侧, 网络侧根据相关信息, 来判决是否存在覆盖漏洞。 例如: 如果服务小区和信号质量最好的周围小区的信号都很差, 那么说明 此处存在覆盖漏洞, 否则, 说明可能是切换参数的设置不合理。
如果 UE由于各种原因没有进行 RRC重建立尝试,或者 RRC重建立尝 试失败,那么 UE可以在下一次的 RRC建立过程中通过 RRC建立完成消息 上报 RLF相关测量信息的指示信息。 网络侧收到该指示信息后, 可以通过 下发 UE Information Request消息,通知 UE上报 RLF相关的测量信息; UE 可以通过 UE Information Response消息将 RLF相关的测量信息上 4艮至网络 侧, 网络侧根据 RLF相关的测量信息, 来判决是否存在覆盖漏洞。
由于基站版本不支持、 信令负荷很高或其它原因, UE上报了 RLF相 关测量信息的指示信息后, 网络侧没有下发命令通知 UE上报 RLF相关的 测量信息; 那么 UE就可能需要一直保留 RLF相关的测量信息, 然后在空 口信令中上报 RLF相关测量信息的指示信息, 这样就会造成空口信令的浪 费和 UE内存空间的浪费。并且,UE在后续上报了 RLF相关的测量信息后, 网络侧可能已经不再需要该信息了, 从而也会造成空口信令的浪费和 UE 内存空间的浪费。 发明内容
有鉴于此, 本发明的主要目的在于提供一种用户设备及其上报 RLF相 关测量信息的方法,以解决现有技术容易造成空口信令浪费和 UE内存空间 浪费的问题。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种用户设备(UE )上报无线链路失败(RLF )相关测 量信息的方法, 该方法包括:
UE接收所属小区的网络侧下发的广播消息或专用消息, 并提取消息中 的保存 RLF相关测量信息的定时器值;
所述 UE在发生 RLF时, 记录 RLF相关测量信息, 并在记录完成后开 启保存 RLF相关测量信息的定时器, UE只在所述定时器时间内保存 RLF 相关测量信息, 并在所述定时器时间内发送 RLF相关测量信息的指示信息 到网络侧。
所述 UE通过 RRC重建立完成消息、 RRC建立完成消息或 RRC重配 置完成消息, 发送所述 RLF相关测量信息的指示信息到网络侧。 所述专用消息为: RRC重配置消息、 RRC连接建立消息或 RRC连接 重建立消息。
该方法进一步包括:如果保存 RLF相关测量信息的定时器超时,则 UE 不再保存 RLF相关的测量信息,并不再发送 RLF相关测量信息的指示信息。
所述网络侧包括: 基站或无线网络控制器。
本发明还提供了一种 UE, 包括:
定时器值提取模块, 用于接收所属小区的网络侧下发的广播消息或专 用消息, 并提取消息中的保存 RLF相关测量信息的定时器值;
信息处理模块,用于在所述 UE发生 RLF时,记录 RLF相关测量信息, 并在记录完成后开启保存 RLF相关测量信息的定时器, 只在所述定时器时 间内保存 RLF相关测量信息,并在所述定时器时间内发送 RLF相关测量信 息的指示信息到网络侧。
所述信息处理模块进一步用于, 通过 RRC重建立完成消息、 RRC建立 完成消息或 RRC重配置完成消息,发送所述 RLF相关测量信息的指示信息 到网络侧。
所述专用消息为: RRC重配置消息、 RRC连接建立消息或 RRC连接 重建立消息。
所述信息处理模块进一步用于, 在保存 RLF相关测量信息的定时器超 时时, 不再保存 RLF相关的测量信息, 并不再发送 RLF相关测量信息的指 示信息。
所述网络侧包括: 基站或无线网络控制器。
本发明所提供的一种用户设备及其上报 RLF相关测量信息的方法, 在 UE发生 RLF的小区通过广播或专用消息发送一个保存 RLF相关测量信息 的定时器值, UE在记录了 RLF相关测量信息后, 开启保存该信息的定时 器; UE只在该定时器时间内保存 RLF相关测量信息, 并在该定时器时间 内发送 RLF相关测量信息的指示信息到网络侧。 通过本发明, UE可以有 效的保存 RLF相关测量信息, 并上报 RLF相关测量信息的指示信息, 网络 侧可以获取到 RLF相关测量信息, 并根据 UE上报的 RLF相关测量信息有 效区分由于移动性参数导致的 RLF问题, 为移动鲁棒性优化提供更准确的 输入, 从而提高网络的性能; 另外, UE无需一直保存 RLF相关的测量信 息,只是在定时器时间内保存 RLF相关的测量信息以及发送 RLF相关测量 信息的指示信息, 这也减少了空口信令和 UE内存的开销。 附图说明
图 1为现有技术中的 LTE网络架构示意图;
图 2为现有技术中的覆盖漏洞和切换问题导致 RLF的示意图; 图 3为本发明一种用户设备上报 RLF相关测量信息的方法流程图; 图 4为本发明实施例中基站广播保存 RLF相关测量信息的定时器值的 示意图;
图 5为本发明实施例中基站通过专用消息发送保存 RLF相关测量信息 的定时器值的示意图;
图 6为本发明实施例中 UE在小区 1中发生 RLF并在小区 2中进行 RRC 重建立成功的示意图;
图 7为本发明实施例中 UE在小区 1中发送 RLF并在小区 2中进行 RRC 重建立失败, 重选到小区 3中并进行 RRC重建立成功的示意图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 本发明提供的一种 UE上报 RLF相关测量信息的方法, 如图 3所示, 该方法主要包括以下步骤:
步骤 301 , UE接收所属小区的网络侧下发的广播消息或专用消息, 并 提取消息中的保存 RLF相关测量信息的定时器值。
位于 UE所属小区网络侧的基站(eNB )可以通过广播消息的方式, 将 保存 RLF相关测量信息的定时器值发送到该小区的 UE, 如图 4所示; 当 然, 基站也可以通过专用消息, 将保存 RLF相关测量信息的定时器值发送 到该小区的 UE, 如图 5所示。
步骤 302, UE在发生 RLF时, 记录 RLF相关测量信息, 并在记录完 成后开启保存 RLF相关测量信息的定时器, UE只在该定时器时间内保存 RLF相关测量信息, 并在该定时器时间内发送 RLF相关测量信息的指示信 息到网络侧。
由于 UE无需一直保存 RLF相关的测量信息, 而只是在定时器时间内 保存 RLF相关的测量信息以及发送 RLF相关测量信息的指示信息,这也减 少了空口信令和 UE内存的开销。
下面通过具体实施例, 对上述方法在实际应用场景中的具体操作流程 进行阐述。
本发明的实施例一中, 基站通过广播消息发送保存 RLF相关测量信息 的定时器值, 参照图 6所示 UE在小区 (Cell ) 1中发生 RLF并在 Cell 2进 行 RRC重建立成功的应用场景, 具体的操作包括:
UE驻留在基站 1所辖的 Cell 1中, Cell 1通过广播消息发送 UE保存 RLF相关测量信息的定时器值, 该定时器值表示基站 1检测到 Cell 1中的 UE发生了 RLF之后保存该 UE的上下文( context )信息的时间。 该定时器 值可以在系统信息块类型 2 ( SIB2, System Information Block Type2 ) 中广 播, UE通过读取广播消息来获取该定时器值。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择在基站 2所辖的小区 Cell 2进行 RRC重建立过程, UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果(信号质量 测量 ), 还可以记录 UE在随后发起重建时所测量的服务小区以及信号质量 最好的周围邻区测量结果, 还可以记录 UE 的位置信息。 在记录完成后, UE 开启保存 RLF 相关测量信息的定时器。 UE 在 RRC Connection Reestablishment Complete消息中携带 RLF相关测量信息的指示信息, 告知 基站 2该 UE保存了 RLF相关的测量信息。 RLF相关的测量信息, 包括以 下至少之一: RLF发生之前的服务小区以及信号质量最好的周围邻区的测 量结果、 UE在随后发起重建时所测量的服务小区以及信号质量最好的周围 邻区的测量结果; 还可以包括 UE的位置信息。
基站 2收到 UE的 RRC Connection Reestablishment Complete消息, 并 获取到该消息中的 RLF相关测量信息的指示信息后, 由于基站 2的版本不 支持 RLF相关测量信息的获取、 或空口的信令负荷比较重、 或其它原因, 基站 2并没有向该 UE发出获取 RLF相关测量信息的命令, 也就是说, 基 站 2没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。
后续若保存 RLF相关测量信息的定时器没有超时,则 UE继续保存 RLF 相关的测量信息, 并可通过上行消息向基站 2发送 RLF相关测量信息的指 示信息, 例如: 可以通过 RRC重建立完成消息、 RRC建立完成消息、 RRC 重配置完成消息或其它上行消息发送。 基站 2收到 RLF相关测量信息的指 示信息后, 根据自身的负荷情况并结合自身算法, 可以向 UE 发送 UE Information Request消息, 命令 UE上报 RLF相关的测量信息, UE可以通 过 UE Information Response消息将 RLF相关的测量信息上^艮给基站 2。 若 保存 RLF相关测量信息的定时器超时, 则 UE不再保存 RLF相关的测量信 息, 并不再发送 RLF相关测量信息的指示信息。
本发明的实施例二中, 基站通过专用消息发送保存 RLF相关测量信息 的定时器值, 参照图 6所示 UE在 Cell 1中发生 RLF并在 Cell 2进行 RRC 重建立成功的应用场景, 具体的操作包括: UE驻留在基站 1所辖的 Cell 1中, Cell 1通过专用消息发送保存 RLF 相关测量信息的定时器值, 例如: 可以通过 RRC重配置 ( RRC Connection Reconfiguration ) 消息、 或 RRC连接建立 ( RRC Connection Setup ) 消息、 或 RRC连接重建立 ( RRC Connection Reestablishment ) 消息、 或其它下行 消息发送该定时器值。 该定时器值表示,基站 1检测到 Cell 1中的 UE发生 了 RLF之后, 保存该 UE的 context信息的时间。 UE可以通过读取上述的 专用消息来获取该定时器值。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择在基站 2所辖的小区 Cell 2进行 RRC重建立过程, UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果(信号质量 测量 ), 还可以记录 UE在随后发起重建时所测量的服务小区以及信号质量 最好的周围邻区测量结果, 还可以记录 UE 的位置信息。 在记录完成后, UE 开启保存 RLF 相关测量信息的定时器。 UE 在 RRC Connection Reestablishment Complete消息中携带 RLF相关测量信息的指示信息, 告知 基站 2该 UE保存了 RLF相关的测量信息。 RLF相关的测量信息, 包括以 下至少之一: RLF发生之前的服务小区以及信号质量最好的周围邻区的测 量结果、 UE在随后发起重建时所测量的服务小区以及信号质量最好的周围 邻区的测量结果; 还可以包括 UE的位置信息。
基站 2收到 UE的 RRC Connection Reestablishment Complete消息, 并 获取到该消息中的 RLF相关测量信息的指示信息后, 由于基站 2的版本不 支持 RLF相关测量信息的获取、 或空口的信令负荷比较重、 或其它原因, 基站 2并没有向该 UE发起获取 RLF相关测量信息的命令, 也就是说, 基 站 2没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。
后续若保存 RLF相关测量信息的定时器没有超时,则 UE继续保存 RLF 相关的测量信息, 并可通过上行消息向基站 2发送 RLF相关测量信息的指 示信息, 例如: 可以通过 RRC重建立完成消息、 RRC建立完成消息、 RRC 重配置完成消息或其它上行消息发送。 基站 2收到 RLF相关测量信息的指 示信息后, 根据自身的负荷情况并结合自身算法, 可以向 UE 发送 UE Information Request消息, 命令 UE上报 RLF相关的测量信息, UE可以通 过 UE Information Response消息将 RLF相关的测量信息上^艮给基站 2。 若 保存 RLF相关测量信息的定时器超时, 则 UE不再保存 RLF相关的测量信 息, 并不再发送 RLF相关测量信息的指示信息。
本发明的实施例三中, 基站通过广播消息发送保存 RLF相关测量信息 的定时器值, 参照图 7所示 UE在 Cell 1中发送 RLF且在 Cell 2进行 RRC 重建立失败, 进而重选到 Cell 3中进行 RRC建立成功的应用场景, 具体的 操作包括:
UE驻留在基站 1所辖的 Cell 1中, Cell 1通过广播消息发送 UE保存 RLF相关测量信息的定时器值,该定时器值可以用来表示基站 1检测到 Cell 1中的 UE发生了 RLF之后保存该 UE的上下文( context )信息的时间。 该 定时器值可以在 SIB2中广播, UE可以通过读取广播消息来获取该定时器。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择在基站 2所辖的小区 Cell 2进行 RRC重建立过程, UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果(信号质量 测量 ), 还可以记录 UE在随后发起重建时所测量的服务小区以及信号质量 最好的周围邻区测量结果, 还可以记录 UE的位置信息。 在记录完后, UE 开启保存 RLF相关测量信息的定时器。
由于各种原因, 导致 UE的 RRC重建立失败, UE转入空闲( idle )态, UE通过小区重选选择了在基站 3所辖的 Cell 3中进行 RRC建立请求, UE 的 RRC建立成功转入连接态。若保存 RLF相关测量信息的定时器没有超时, 则 UE继续保存 RLF相关的测量信息, UE可以在 RRC Connection Setup Complete消息中携带 RLF相关测量信息的指示信息, 告知基站 3该 UE保 存有 RLF相关的测量信息。 RLF相关的测量信息, 包括以下至少之一: RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果、 UE在随后 发起重建时所测量的服务小区以及信号质量最好的周围邻区的测量结果; 还可以包括 UE的位置信息。
基站 3收到 UE的 RRC Connection Setup Complete消息,并获取到该消 息中的 RLF相关测量信息的指示信息后, 可以向 UE发送 UE Information Request 消息, 命令 UE 上报 RLF 相关的测量信息, UE 可以通过 UE Information Response消息将 RLF相关的测量信息上 给基站 3。
若由于基站 3的版本不支持 RLF相关测量信息的获取、 或空口的信令 负荷比较重、 或其它原因, 基站 3并没有向该 UE发出获取 RLF相关测量 信息的命令, 也就是说, 基站 3没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。 那么, 后续若保存 RLF相关测量信息的定时 器没有超时, 则 UE继续保存 RLF相关的测量信息, 并可通过上行消息向 基站 3发送 RLF相关测量信息的指示信息,例如: 可以通过 RRC重建立完 成消息、 RRC建立完成消息、 RRC重配置完成消息或其它上行消息发送。 基站 3收到 RLF相关测量信息的指示信息后, 根据自身的负荷情况并结合 自身算法,可以向 UE发送 UE Information Request消息,命令 UE上报 RLF 相关的测量信息, UE可以通过 UE Information Response消息将 RLF相关的 测量信息上 给基站 3。 若保存 RLF相关测量信息的定时器超时, 则 UE 不再保存 RLF相关的测量信息,并不再发送 RLF相关测量信息的指示信息。
本发明的实施例四中, 基站通过专用消息发送保存 RLF相关测量信息 的定时器值, 参照图 7所示 UE在 Cell 1中发送 RLF且在 Cell 2进行 RRC 重建立失败, 进而重选到 Cell 3中进行 RRC建立成功的应用场景, 具体的 操作包括: UE驻留在基站 1所辖的 Cell 1中, Cell 1通过专用消息发送 UE保存 RLF 相关测量信息的定时器值, 例如: 可以通过 RRC Connection Reconfiguration消息、 或 RRC Connection Setup消息、 或 RRC Connection Reestablishment消息、 或其它下行消息发送该定时器值。 该定时器值表示, 基站 1检测到 Cell 1中的 UE发生了 RLF之后, 保存该 UE的 context信息 的时间。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择在基站 2所辖的小区 Cell 2进行 RRC重建立过程, UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果, 还可以记 录 UE在随后发起重建时所测量的服务小区以及信号质量最好的周围邻区 测量结果, 还可以记录 UE的位置信息。 在记录完成后, UE开启保存 RLF 相关测量信息的定时器。
由于各种原因, 导致 UE的 RRC重建立失败, UE转入 idle态, UE选 择了基站 3所辖的 Cell 3中进行 RRC建立请求, UE的 RRC建立成功转入 连接态。若保存 RLF相关测量信息的定时器没有超时,则 UE继续保存 RLF 相关的测量信息, UE可以在 RRC Connection Setup Complete消息中携带 RLF相关测量信息的指示信息, 告知基站 3该 UE保存有 RLF相关的测量 信息。 RLF相关的测量信息, 包括以下至少之一: RLF发生之前的服务小 区以及信号质量最好的周围邻区的测量结果、 UE在随后发起重建时所测量 的服务小区以及信号质量最好的周围邻区的测量结果;还可以包括 UE的位 置信息。
基站 3收到 UE的 RRC Connection Setup Complete消息,并获取到该消 息中的 RLF相关测量信息的指示信息后, 可以向 UE发送 UE Information Request 消息, 命令 UE 上报 RLF 相关的测量信息, UE 可以通过 UE Information Response消息将 RLF相关的测量信息上 给基站 3。 若由于基站 3的版本不支持 RLF相关测量信息的获取、 或空口的信令 负荷比较重、 或其它原因, 基站 3并没有向该 UE发出获取 RLF相关测量 信息的命令, 也就是说, 基站 3没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。 那么, 后续若保存 RLF相关测量信息的定时 器没有超时, 则 UE继续保存 RLF相关的测量信息, 并可通过上行消息向 基站 3发送 RLF相关测量信息的指示信息,例如: 可以通过 RRC重建立完 成消息、 RRC建立完成消息、 RRC重配置完成消息或其它上行消息发送。 基站 3收到 RLF相关测量信息的指示信息后, 根据自身的负荷情况并结合 自身算法,可以向 UE发送 UE Information Request消息,命令 UE上报 RLF 相关的测量信息, UE可以通过 UE Information Response消息将 RLF相关的 测量信息上 给基站 3。 若保存 RLF相关测量信息的定时器超时, 则 UE 不再保存 RLF相关的测量信息,并不再发送 RLF相关测量信息的指示信息。
本发明的实施例五涉及在通用移动通信系统( UMTS , Universal Mobile Telecommunications System ) 中的应用, 该实施例中, 网络侧通过广播消息 发送保存 RLF相关测量信息的定时器值, 具体的操作包括:
UE驻留在无线网络控制器( RNC , Radio Network Controller ) 1所辖的 Cell 1中, Cell 1通过广播消息发送 UE保存 RLF相关测量信息的定时器值, 该定时器值表示 RNC 1检测到 Cell 1中的 UE发生了 RLF之后保存该 UE 的上下文(context )信息的时间。 该定时器可以在 SIB1 中广播, UE通过 读取广播消息来获取该定时器。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择了在网元 2所辖的 Cell 2进行 RRC重建立过程 , UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果(信号质量 测量 ), 还可以记录 UE在随后发起重建时所测量的服务小区以及信号质量 最好的周围邻区测量结果, 还可以记录 UE 的位置信息。 在记录完成后, UE开启保存 RLF相关测量信息的定时器。 若 RRC重建立成功, 则在 RRC 建立完成消息中、 或无线承载重配置完成 ( Radio Bearer Reconfiguration Complete )消息、或传输信道重配置完成 ( Transport Channel Reconfiguration Complete )消息、 或物理信道重配置冗成 ( Physical Channel Reconfiguration Complete ) 消息、 或其它上行消息中携带 RLF相关测量信息的指示信息, 网元 2可以要求 UE上报 RLF相关的测量信息。 若定时器超时, 则 UE不 再保存 RLF相关的测量信息,在上述消息中不再携带 RLF相关测量信息的 指示信息。
若由于各种原因, 导致 UE的 RRC重建立失败, UE转入 idle态, UE 选择了网元 3所辖的 Cell 3中进行 RRC建立请求, UE的 RRC建立成功转 入连接态。 若保存 RLF相关测量信息的定时器没有超时, 则 UE保存 RLF 相关的测量信息, UE可以在 RRC Connection Setup Complete或其它上行消 息中携带 RLF相关测量信息的指示信息, 告知网元 3 UE保存 RLF相关的 测量信息。 RLF相关的测量信息, 包括以下至少之一: RLF发生之前的服 务小区以及信号质量最好的周围邻区的测量结果、 UE在随后发起重建时所 测量的服务小区以及信号质量最好的周围邻区的测量结果; 还可以包括 UE 的位置信息。
网元 3收到 UE的 RRC Connection Setup Complete消息,并获取到该消 息中的 RLF相关测量信息的指示信息后, 可以向 UE发送 UE Information Request 消息, 命令 UE 上报 RLF 相关的测量信息, UE 可以通过 UE Information Response消息将 RLF相关的测量信息上报给网元 3。
若由于网元 3的版本不支持 RLF相关测量信息的获取、 或空口的信令 负荷比较重、 或其它原因, 网元 3没有向该 UE发出获取 RLF相关测量信 息的命令, 也就是说, 网元 3没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。那么,后续若保存 RLF相关测量信息的定时器没 有超时, 则 UE继续保存 RLF相关的测量信息, 并可通过上行消息向网元 3发送 RLF相关测量信息的指示信息, 例如: 可以通过 RRC重建立完成消 息、 RRC建立完成消息、 RRC重配置完成消息或其它上行消息发送。 网元 3收到 RLF相关测量信息的指示信息后, 根据自身的负荷情况并结合自身 算法, 可以向 UE发送 UE Information Request消息, 命令 UE上报 RLF相 关的测量信息, UE可以通过 UE Information Response消息将 RLF相关的测 量信息上^艮给网元 3。 若保存 RLF相关测量信息的定时器超时, 则 UE不 再保存 RLF相关的测量信息, 并不再发送 RLF相关测量信息的指示信息。
上述网元是指 LTE系统中的基站( eNB )或者 UMTS中的 RNC。
本发明的实施例六涉及在 UMTS中的应用, 该实施例中, 网络侧通过 专用消息发送保存 RLF相关测量信息的定时器值, 具体的操作包括:
UE驻留在基站管理器 1所辖的 Cell 1中, Cell 1通过专用消息发送 UE 保存 RLF相关测量信息的定时器值, 例如: 可以通过小区更新确认(Cell Update Confirm ) 消息、 或 RRC连接建立 ( RRC Connection Setup ) 消息、 或无线 载重配置 ( Radio Bearer Reconfiguration ) 消息、 或传输信道重配 置 ( Transport Channel Reconfiguration )消息、 或物理信道重配置 ( Physical Channel Reconfiguration ) 消息、 或其他下行消息发送该定时器值。 该定时 器值表示 RNC 1检测到 Cell 1中的 UE发生了 RLF之后保存该 UE的上下 文 ( context )信息的时间。
由于无线质量变差或其它原因导致 UE发生了 RLF, UE根据小区选择 过程选择了在网元 2所辖的 Cell 2进行 RRC重建立过程 , UE记录在 RLF 发生之前的服务小区以及信号质量最好的周围邻区的测量结果(信号质量 测量 ), 还可以记录 UE在随后发起重建时所测量的服务小区以及信号质量 最好的周围邻区测量结果, 还可以记录 UE 的位置信息。 在记录完成后, UE开启保存 RLF相关测量信息的定时器。 若 RRC重建立成功, 则在 RRC 建立完成消息中、 或 Radio Bearer Reconfiguration Complete 消息、 或 Transport Channel Reconfiguration Complete 消息、 或 Physical Channel Reconfiguration Complete消息、 或其它上行消息中携带 RLF相关测量信息 的指示信息, 网元 2可以要求 UE上报 RLF相关的测量信息。 若定时器超 时, 则 UE不再保存 RLF相关的测量信息, 在上述消息中不再携带 RLF相 关测量信息的指示信息。
若由于各种原因, 导致 UE的 RRC重建立失败, UE转入 idle态, UE 选择了网元 3所辖的 Cell 3中进行 RRC建立请求, UE的 RRC建立成功转 入连接态。 若保存 RLF相关测量信息的定时器没有超时, 则 UE保存 RLF 相关的测量信息, UE可以在 RRC Connection Setup Complete或其它上行消 息中携带 RLF相关测量信息的指示信息, 告知网元 3 UE保存 RLF相关的 测量信息。 RLF相关的测量信息, 包括以下至少之一: RLF发生之前的服 务小区以及信号质量最好的周围邻区的测量结果、 UE在随后发起重建时所 测量的服务小区以及信号质量最好的周围邻区的测量结果; 还可以包括 UE 的位置信息。
网元 3收到 UE的 RRC Connection Setup Complete消息,并获取到该消 息中的 RLF相关测量信息的指示信息后, 可以向 UE发送 UE Information Request 消息, 命令 UE 上报 RLF 相关的测量信息, UE 可以通过 UE Information Response消息将 RLF相关的测量信息上报给网元 3。
若由于网元 3的版本不支持 RLF相关测量信息的获取、 或空口的信令 负荷比较重、 或其它原因, 网元 3没有向该 UE发出获取 RLF相关测量信 息的命令, 也就是说, 网元 3没有向 UE发出获取 RLF相关测量信息的 UE Information Request消息。那么,后续若保存 RLF相关测量信息的定时器没 有超时, 则 UE继续保存 RLF相关的测量信息, 并可通过上行消息向网元 3发送 RLF相关测量信息的指示信息, 例如: 可以通过 RRC重建立完成消 息、 RRC建立完成消息、 RRC重配置完成消息或其它上行消息发送。 网元 3收到 RLF相关测量信息的指示信息后, 根据自身的负荷情况并结合自身 算法, 可以向 UE发送 UE Information Request消息, 命令 UE上报 RLF相 关的测量信息, UE可以通过 UE Information Response消息将 RLF相关的测 量信息上^艮给网元 3。 若保存 RLF相关测量信息的定时器超时, 则 UE不 再保存 RLF相关的测量信息, 并不再发送 RLF相关测量信息的指示信息。
上述网元是指 LTE系统中的基站( eNB )或者 UMTS中的 RNC。
对应上述 UE上报 RLF相关测量信息的方法,本发明还提供了一种 UE , 包括: 定时器值提取模块和信息处理模块。 其中, 定时器值提取模块, 用 于接收所属小区的网络侧下发的广播消息或专用消息, 并提取消息中的保 存 RLF相关测量信息的定时器值。信息处理模块,用于在 UE发生 RLF时, 记录 RLF相关测量信息,并在记录完成后开启保存 RLF相关测量信息的定 时器, 只在该定时器时间内保存 RLF相关测量信息, 并在该定时器时间内 发送 RLF相关测量信息的指示信息到网络侧。
较佳的,信息处理模块可以通过 RRC重建立完成消息、 RRC建立完成 消息、 RRC重配置完成消息或其它上行消息, 发送 RLF相关测量信息的指 示信息到网络侧。
较佳的, 信息处理模块在保存 RLF相关测量信息的定时器超时时, 不 再保存 RLF相关的测量信息, 并不再发送 RLF相关测量信息的指示信息。
综上所述, 通过本发明, UE可以有效的保存 RLF相关测量信息, 并 上报 RLF相关测量信息的指示信息,网络侧可以获取到 RLF相关测量信息, 并根据 UE上报的 RLF相关测量信息有效区分由于移动性参数导致的 RLF 问题, 为移动鲁棒性优化提供更准确的输入, 从而提高网络的性能; 另外, UE无需一直保存 RLF相关的测量信息, 只是在定时器时间内保存 RLF相 关的测量信息以及发送 RLF相关测量信息的指示信息, 这也减少了空口信 令和 UE内存的开销。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种用户设备 ( UE )上报无线链路失败(RLF )相关测量信息的方 法, 其特征在于, 该方法包括:
UE接收所属小区的网络侧下发的广播消息或专用消息, 并提取消息中 的保存 RLF相关测量信息的定时器值;
所述 UE在发生 RLF时, 记录 RLF相关测量信息, 并在记录完成后开 启保存 RLF相关测量信息的定时器, UE只在所述定时器时间内保存 RLF 相关测量信息, 并在所述定时器时间内发送 RLF相关测量信息的指示信息 到网络侧。
2、根据权利要求 1所述 UE上报 RLF相关测量信息的方法, 其特征在 于, 所述 UE通过 RRC重建立完成消息、 RRC建立完成消息或 RRC重配 置完成消息, 发送所述 RLF相关测量信息的指示信息到网络侧。
3、根据权利要求 1所述 UE上报 RLF相关测量信息的方法, 其特征在 于, 所述专用消息为: RRC重配置消息、 RRC连接建立消息或 RRC连接 重建立消息。
4、根据权利要求 1所述 UE上报 RLF相关测量信息的方法, 其特征在 于, 该方法进一步包括: 如果保存 RLF相关测量信息的定时器超时, 则 UE 不再保存 RLF相关的测量信息,并不再发送 RLF相关测量信息的指示信息。
5、根据权利要求 1至 4任一项所述 UE上报 RLF相关测量信息的方法, 其特征在于, 所述网络侧包括: 基站或无线网络控制器。
6、 一种 UE, 其特征在于, 包括:
定时器值提取模块, 用于接收所属小区的网络侧下发的广播消息或专 用消息, 并提取消息中的保存 RLF相关测量信息的定时器值;
信息处理模块,用于在所述 UE发生 RLF时,记录 RLF相关测量信息, 并在记录完成后开启保存 RLF相关测量信息的定时器, 只在所述定时器时 间内保存 RLF相关测量信息,并在所述定时器时间内发送 RLF相关测量信 息的指示信息到网络侧。
7、 根据权利要求 6所述 UE, 其特征在于, 所述信息处理模块进一步 用于, 通过 RRC重建立完成消息、 RRC建立完成消息或 RRC重配置完成 消息, 发送所述 RLF相关测量信息的指示信息到网络侧。
8、 根据权利要求 6所述 UE, 其特征在于, 所述专用消息为: RRC重 配置消息、 RRC连接建立消息或 RRC连接重建立消息。
9、 根据权利要求 6所述 UE, 其特征在于, 所述信息处理模块进一步 用于, 在保存 RLF相关测量信息的定时器超时时, 不再保存 RLF相关的测 量信息, 并不再发送 RLF相关测量信息的指示信息。
10、 根据权利要求 6至 9任一项所述 UE, 其特征在于, 所述网络侧包 括: 基站或无线网络控制器。
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CN110022620A (zh) * 2018-01-08 2019-07-16 维沃移动通信有限公司 一种无线链路失败的处理方法、用户终端和网络侧设备

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