WO2015085471A1 - 一种小区切换方法、设备及网络系统 - Google Patents

一种小区切换方法、设备及网络系统 Download PDF

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Publication number
WO2015085471A1
WO2015085471A1 PCT/CN2013/088900 CN2013088900W WO2015085471A1 WO 2015085471 A1 WO2015085471 A1 WO 2015085471A1 CN 2013088900 W CN2013088900 W CN 2013088900W WO 2015085471 A1 WO2015085471 A1 WO 2015085471A1
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Prior art keywords
cell
uplink channel
measurement data
rnc
handover
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PCT/CN2013/088900
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English (en)
French (fr)
Inventor
卢劭薇
李军
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/088900 priority Critical patent/WO2015085471A1/zh
Priority to CN201380003115.XA priority patent/CN105052204A/zh
Publication of WO2015085471A1 publication Critical patent/WO2015085471A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink

Definitions

  • the present invention relates to the field of communications, and in particular, to a cell handover method, device, and network system. Background technique
  • the network side when the load difference between two adjacent cells is large, the network side usually actively adjusts the load of each cell by switching the cell, so that the cell-to-cell handover is used to load the cell with a heavier load.
  • User Equipment UE
  • the existing handover since the soft handover can make the communication of the user in the process of the handover uninterrupted, and the link can be new, the existing handover generally uses soft handover, and the soft handover generally refers to the same Switching between frequency cells.
  • the specific process of the soft handover is as follows: The UE performs the measurement of the downlink pilot signal strength of the neighboring cell under the control of the network side, and reports the generated measurement report to the radio network controller (RNC).
  • RNC radio network controller
  • the RNC makes a handover decision for the UE according to the received measurement report.
  • the foregoing handover decision includes determining whether to add, delete, or replace a wireless link. If the result of the decision is to perform handover, the handover is completed by a procedure such as radio link addition, or radio link deletion. Otherwise, the wireless link is not added, deleted or replaced, and the current processing flow is ended.
  • the type of the foregoing measurement report is an event report, and includes reporting of cell handover events such as 1A, 1 B, 1 C, 1 D, 1 E, and IF.
  • 1A is a relative threshold increase event, indicating that the quality of a cell is close to the best cell or activity set quality; 1 B is a relative threshold deletion event, indicating that the quality of a cell is much worse than the best cell or activity set; 1 C To replace the event, it indicates that one cell is better than the active set cell; 1 D is the best cell change event; 1 E is the measured value is higher than the absolute threshold event; 1 F is the measured value lower than the absolute threshold event.
  • the RNC can make handover decisions for the UE based on various events or a combination of various events.
  • the UE detects the downlink pilot signal strength measurement value of the cell 1 in the active set and the cell 2
  • the difference of the downlink pilot signal strength measurement value is greater than (report threshold AS_Th+deletion hysteresis threshold AS-Th- Hyst) and continues for ⁇ T time, and the 1 B event report is performed.
  • the cell 1 is the cell with the best downlink downlink pilot signal strength in the active set.
  • the RNC deletes the handover decision of the cell 2 according to the 1 B event, and moves the cell 2 out of the active set.
  • the process of moving the cell out of the active set is the process of deleting the wireless link of the cell, which is referred to as deleting the link.
  • the measurement report reported by the UE only depends on the signal quality of the UE on the downlink channel, such as the received signal code power (RSCP), Ec/N0, and the like.
  • RSCP received signal code power
  • Ec/N0 Ec/N0
  • problems there are the following problems: When the two cells of the original cell and the target cell are unbalanced, that is, the uplink channel quality difference ratio of the target cell The original cell is poor, but the downlink downlink channel of the target cell is better than the uplink quality of the original cell, so that the original cell is deleted by satisfying the condition of reporting the deletion event, but at the same time, after deleting the original cell link, due to the target cell The uplink channel performance is poor, causing the UE to drop calls after the handover is completed.
  • the embodiments of the present invention provide a cell handover method, device, and network system, which can reduce the call drop rate during cell handover in the case of uplink and downlink imbalance.
  • a radio network controller RNC including:
  • a receiving unit configured to receive a measurement report reported by the user equipment UE
  • An acquiring unit configured to acquire measurement data obtained by the base station to measure an uplink channel of the UE
  • a determining unit configured to perform a handover decision based on the measurement report received by the receiving unit and the measurement data acquired by the acquiring unit;
  • a switching unit configured to complete cell handover by interacting with the base station and the UE when the decision result of the determining unit is that handover is required.
  • the measurement report includes a small a zone switching event; the determining unit includes:
  • a first determining module configured to: whether an execution condition of the cell handover event is met;
  • a second determining module configured to determine, according to the measurement data, whether the uplink channel of the UE in the target cell is in a trusted range
  • a determining module configured to: when the first determining module determines that an execution condition of the cell handover event is met, and the second determining module determines that the uplink channel of the target cell is in a trusted range, The decision needs to be switched.
  • the second determining module is specifically configured to: obtain, according to the measurement data, a signal to interference ratio SIR of an uplink channel of the target cell and the original cell, and determine an SIR and an uplink channel of the UE in the target cell. Whether the ratio of the SIR of the uplink channel of the UE in the original cell reaches a preset threshold. If the preset threshold is reached, the uplink channel of the UE in the target cell is in a trusted range.
  • a base station including:
  • a measuring unit configured to measure an uplink channel of the user equipment UE, to obtain measurement data of an uplink channel of the UE;
  • a reporting unit configured to report measurement data of an uplink channel of the UE measured by the measurement unit to a radio network controller RNC, so that the RNC performs a handover decision according to the measurement data;
  • a receiving unit configured to receive a handover instruction that is sent by the RNC after determining that the UE needs to be handed over;
  • a switching unit configured to complete a switching operation of the link layer according to the switching instruction received by the receiving unit.
  • the receiving unit is further configured to receive the indication message sent by the RNC, where the indication message is used to indicate that the base station acquires measurement data of an uplink channel of the UE;
  • the measuring unit performs an operation of performing measurement on an uplink channel of the UE after the indication message received by the receiving unit.
  • the measurement data of the uplink channel of the UE includes a signal to interference ratio SIR or a signal to interference ratio deviation SIRerr of an active set of the UE and an uplink channel of each cell in the monitoring set.
  • a user equipment UE including:
  • a measuring unit configured to measure a signal quality of the downlink channel
  • An obtaining unit configured to acquire an uplink power control word of the original cell and the target cell when the measurement result of the measurement unit meets a trigger condition of the cell handover event
  • a determining unit configured to determine, by comparing the uplink power control words of the original cell and the target cell, whether the uplink channel of the UE in the target cell is in a trusted range
  • the reporting unit configured to determine, by the determining unit, After the uplink channel of the target cell is in a trusted range, the UE reports a measurement report including a cell handover event to the radio network controller RNC.
  • the determining unit is specifically configured to: compare the size of the uplink power control word of the original cell and the target cell, and if the uplink power control word of the original cell is greater than the uplink power control word of the target cell, determine the location The uplink channel of the UE in the target cell is in a trusted range.
  • a radio network controller RNC including:
  • a communication interface configured to communicate with an external network element
  • the cell handover is completed by interacting with the base station and the UE through the communication interface.
  • a base station including:
  • a communication interface configured to communicate with an external network element
  • the measurement data of the uplink channel of the UE is reported to the wireless network controller RNC through the communication interface, so that the RNC performs a handover decision according to the measurement data;
  • the switching operation of the link layer is completed according to the switching instruction.
  • a user equipment UE including:
  • a communication interface configured to communicate with an external network element
  • the uplink power control words of the original cell and the target cell are obtained;
  • the UE is in the trusted range of the uplink channel of the target cell, reporting, by the communication interface, a measurement report including a cell handover event to the radio network controller RNC.
  • the seventh aspect provides a cell handover method, including:
  • the radio network controller RNC receives the measurement report reported by the user equipment UE, acquires measurement data obtained by the base station measuring the uplink channel of the UE, and performs handover based on the measurement report reported by the UE and the measurement data of the uplink channel of the UE. judgment; When the result of the decision is that handover is required, cell handover is completed by interacting with the base station and the UE.
  • the measurement report includes a cell handover event
  • the performing the handover decision based on the measurement report reported by the UE and the measurement data of the uplink channel of the UE includes:
  • Determining, according to the measurement data, whether the uplink channel of the UE in the target cell is in a trusted range includes:
  • a signal to interference ratio (SIR) of the uplink channel of the UE in the target cell and the original cell Obtaining, according to the measurement data, a signal to interference ratio (SIR) of the uplink channel of the UE in the target cell and the original cell, and determining an SIR of the uplink channel of the UE in the target cell and an uplink channel of the UE in the original cell. If the ratio of the SIR reaches a preset threshold, if the preset threshold is reached, the uplink channel of the UE in the target cell is in a trusted range.
  • SIR signal to interference ratio
  • the eighth aspect provides a cell handover method, including:
  • the base station measures the uplink channel of the user equipment UE, and obtains measurement data of the uplink channel of the UE;
  • the measurement data of the uplink channel of the UE is reported to the radio network controller RNC, so that the RNC performs a handover decision according to the measurement data;
  • the switching operation of the link layer is completed according to the switching instruction.
  • a ninth aspect provides a cell handover method, including: The user equipment UE measures the signal quality of the downlink channel;
  • the UE acquires an uplink power control word of the original cell and the target cell;
  • the UE reports a measurement report including the cell handover event to the radio network controller RNC, so that the RNC performs according to the cell handover event. Switch the decision.
  • the comparing, by comparing the uplink power control words of the original cell and the target cell, whether the uplink channel of the UE in the target cell is in a trusted range includes:
  • the UE determines that the UE is in the The uplink channel of the target cell is in a trusted range.
  • the cell handover method, device, and network system provided by the embodiments of the present invention implement cell handover on the basis of comprehensive consideration of the quality of the downlink channel of the UE and the quality of the upper and lower channels, and only the UE is compared to the prior art.
  • the measurement of the downlink channel signal to determine the original cell the present invention can reduce the call drop rate during handover in the scenario of uplink and downlink imbalance, and at the same time improve the user experience.
  • FIG. 1 is a schematic structural diagram of a network for implementing cell handover according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a cell handover method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another cell handover method according to an embodiment of the present invention.
  • 5 is a schematic flowchart of a cell handover method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an RNC according to an embodiment of the present invention.
  • FIG. 7 is another schematic diagram of an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;
  • FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
  • FIG. 1 is a schematic structural diagram of a base station according to another embodiment of the present invention;
  • FIG. 12 is a schematic structural diagram of a user equipment according to another embodiment of the present invention;
  • FIG. 1 is a schematic diagram of a network structure for implementing cell handover in a mobile communication network.
  • the above mobile communication network may be a 2/3 G (The Second Generation Partnership (2G) / The Third Generation Partnership Project (3G) network). Can also be 4G (fourth generation partner Companion project) Network or other network with similar switching scenarios.
  • the mobile communication network includes a network system 1 and a User Equipment (UE) 2.
  • the network system 1 includes: a radio network controller (RNC) 1 1 and a base station 12.
  • RNC radio network controller
  • FIG. 1 is only an exemplary description. In an actual networking, an RNC may be connected to one or more base stations.
  • the handover in the embodiment of the present invention may occur between cells of the same base station (such as cell 1 and cell 2 shown in FIG. 1), or may occur between cells of different base stations.
  • the cell handover between UE2 and base station 12 is controlled by RNC 1 1 connected to base station 12.
  • the cell handover mainly includes three stages of handover measurement, handover decision, and handover execution.
  • the measurement result of the handover measurement phase is used as an input of the handover decision, and the handover decision phase determines whether to perform handover according to the measurement result of the handover measurement phase. If the determination result is that the handover is performed, the handover execution phase is entered; otherwise, the handover procedure is ended.
  • the cell is a logical concept, and is divided according to the signal coverage of the base station, and one base station may have at least one cell.
  • the cell can be divided into sets of active sets, monitoring sets, or unlisted sets according to the relationship that provides services to the UE.
  • the active set is a set of current serving cells, including one or more cells that are providing services for the UE.
  • a monitoring set is a collection of cells that may participate in a handover under surveillance to enter the UE active set.
  • An unlisted set is a collection of cells that are not listed in the active set and monitoring set but may be the switching cell.
  • the process of performing the handover is to update the active set or the monitoring set of the UE, for example, adding a cell whose cell quality is close to the best cell or active set quality to the activity set, or comparing the quality of the activity to the best cell or activity.
  • the cell with a large difference in quality is removed from the activity set and the like.
  • This process consists of a series of signaling procedures that are done by adding, deleting or replacing wireless links. Among them, the replacement operation of the wireless link is a combination of addition and deletion of the wireless link.
  • the embodiment of the present invention provides two ways to solve the call drop problem caused by cell handover in the uplink and downlink imbalance scenario.
  • Mode 1 UE2 measures the signal quality of the downlink channel under the control of RNC 1 1 .
  • the UE 2 reports the measurement report to the RNC 1 1 .
  • RNC 1 1 After receiving the measurement report of UE2, RNC 1 1 further acquires the base.
  • the measurement data of the uplink channel of the UE2 is performed based on the measurement report reported by the UE2 and the measurement data of the uplink channel of the UE2, and when it is determined that the handover is required, the handover is performed.
  • the RNC 1 1 may initiate uplink dedicated measurement of the base station to obtain measurement data, and may also request measurement data from the base station 12 by using a private interface.
  • the specific implementation process may be: the RNC 11 sends an indication message to the base station 12, instructing the base station 12 to measure the uplink channel of the UE2, and receiving the measured measurement data from the base station 12; or, the base station 12 actively reports the measurement of the uplink channel of the UE2. After receiving the measurement report of the UE2, the RNC 1 1 obtains the measurement data of the uplink channel of the UE2 that was last reported by the base station 12.
  • the RNC 1 1 further considers the quality of the uplink channel of the UE2 in each cell in the process of performing the handover decision, and avoids the problem of dropped calls due to the uplink and downlink imbalance.
  • Mode 2 UE2 measures the signal quality of the downlink channel under the control of RNC 1 1.
  • the UE further acquires the upper and lower power control words of the original cell and the target cell.
  • the UE2 compares the uplink power control words of the original cell and the target cell to determine whether the uplink channel of the target cell is in a trusted range.
  • UE2 reports the measurement report to RNC 1 1 only when the uplink channel of the target cell is in a trusted range.
  • the RNC 1 1 performs a handover decision based on the measurement report reported by the UE 2, and performs handover when it is determined that the handover is required.
  • the UE2 further considers the uplink channel quality of the target cell and the original cell before reporting the measurement report, and reports the measurement report only when the uplink channel of the target cell is trusted. Therefore, even if the RNC 1 1 performs the handover decision, The quality of the uplink channel is not considered, and the problem of dropped calls after switching is not caused.
  • the first method described above achieves the object of the present invention by modifying an existing RNC and a base station.
  • the function of acquiring the measurement data of the uplink channel of the UE and the function of determining the quality of the uplink channel of the UE in the handover decision are added to the RNC.
  • the base station a function of measuring the quality of the uplink channel of the UE and reporting the measured data to the RN C is added.
  • FIG. 2 is a schematic diagram of a cell handover method according to an embodiment of the present invention, which can be implemented in a network system as shown in FIG. 1 and controlled by a radio network RNC. As shown in FIG. 2, the cell handover method specifically includes the following steps:
  • the radio network controller The RNC receives the measurement report reported by the user equipment UE. After the UE enters the CELL-DCH connection mode, the RNC may send measurement control signaling to the UE, and instruct the UE to measure the cell quality and perform a cell handover event report.
  • the measurement control signaling includes a trigger threshold of a cell handover event. After receiving the measurement control signaling, the UE starts the measurement and meets the trigger threshold of the cell handover event, and reports the measurement report to the RNC.
  • the above measurement process measures the downlink channel of the UE, including measuring the signal quality of the UE's active set and the downlink channel of each cell in the monitoring set. Specifically, it may be a measurement of Received Signal Code Power (RSCP) or pilot strength Ec/Io, and RSCP or Ec/Io here is just one possible example.
  • RSCP Received Signal Code Power
  • Ec/Io pilot strength
  • step 201 can be implemented by using the prior art, and details are not described herein again.
  • the process of the RN C acquiring the measurement data obtained by the base station to measure the uplink channel of the U E may include: the RNC sending an indication message to the base station, instructing the base station to measure the uplink channel of the UE, and receiving the measured measurement data from the base station. Or, the base station periodically reports the measurement data of the uplink channel of the UE, and after receiving the measurement report of the UE, the RNC obtains the measurement data of the uplink channel of the UE that is reported by the base station last time.
  • the RNC may directly execute the measurement report. Step 202.
  • the RNC may also choose to perform handover events only for certain types of cells, and only require the uplink channel quality of the target cell.
  • the RNC first identifies whether the cell handover event in the measurement report is an event requiring an uplink channel quality; if yes, step 202 is performed; otherwise, the handover decision is directly performed based on the measurement report.
  • the embodiment of the present invention may increase the requirement for the quality of the uplink channel for an event that triggers the de-chaining operation.
  • the RN C After receiving the measurement report, the RN C first determines whether the measurement report is an event report that triggers the chain-cut operation, and if so, acquires measurement data obtained by the base station after measuring the uplink channel of the UE. It should be noted that, for convenience of description, an event that triggers a chain-deletion operation in the embodiment of the present invention is referred to as a delete link event.
  • the deleting the link event may be a 1 B or 1 C event in the soft handover in the 3G network, or may be a B 1 event in the soft handover in the 4G network.
  • the measurement data of the uplink channel of the UE includes, but is not limited to, an uplink channel signal quality of each cell in the active set and the monitoring set, and related pilot energy; and the uplink channel signal quality generally passes the signal to interference ratio (Signto Interference Ratio, SIR) to indicate.
  • SIR Signal to Interference Ratio
  • the RNC performs a handover decision based on the measurement information of the >3 ⁇ 4 on the UE and the measurement data of the upper and lower channels of the UE.
  • the specific process that the RNC performs the handover decision based on the measurement information of the UE and the measurement data of the upper and lower channels of the UE may include: determining whether the execution condition of the cell handover event is satisfied, and determining, according to the measurement data, that the UE is Whether the uplink channel of the target cell is in the trusted range; when it is determined that the execution condition of the cell handover event is satisfied and the UE is in the trusted range of the uplink channel of the target cell, it is determined that the handover is required.
  • the execution condition of the cell handover event may use an execution condition in the existing handover decision. Whether the RNC determines whether the execution condition of the cell handover event is satisfied or not can be judged by using the judgment means in the prior art. For example, when the cell handover event in the measurement report is a deletion link event, the determination of whether the number of cells in the active set of the UE is greater than 1 may be performed according to the existing decision process of deleting the link event. The RNC determines that the number of cells in the active set of the UE is greater than 1, and considers that the execution condition of the delete link event is satisfied.
  • the RNC determines, according to the measurement data, whether the uplink channel of the UE in the target cell is available.
  • the range of the signal may include: the RNC obtains a signal to interference ratio SIR of the uplink channel of the UE in the target cell and the original cell according to the measurement data, and determines whether the ratio of the SIR of the uplink channel of the UE in the target cell to the SIR of the uplink channel of the UE in the original cell is reached.
  • the preset threshold is determined. If the preset threshold is reached, the uplink channel of the UE in the target cell is considered to be in a trusted range.
  • the measurement data of the uplink channel of the UE includes an active set of the UE and an SIR or a signal-to-interference ratio deviation SIRerr of an uplink channel of each cell in the monitoring set.
  • the RNC can directly obtain the SIR of the uplink channel of the UE in the target cell and the original cell from the measurement data.
  • the measurement data includes SIRerr
  • SIR is the measured value of the signal-to-interference ratio
  • SIRtarget is the SIR value that is expected to be received from the UE.
  • the original cell and the target cell may be one or more.
  • the cell handover event is a 1A event
  • the cell that has been in the active set of the UE is the original cell, and may be one or more; the cell to be added to the active set is the target cell.
  • the cell handover event is a 1 B event
  • the cell to be removed from the active set is the original cell, and the remaining cells in the active set are the target cell, where the target cell may be one or more.
  • the original cell or the target cell is multiple, when the SIR is acquired, it may be an average of multiple cells, or take the best SIR or the worst SIR of the multiple cells. When it is implemented, it can be selected as needed.
  • the cell handover is completed by interacting with the base station and the UE.
  • the RNC determines that the radio link operation needs to be performed according to the measurement data of the uplink channel of the UE reported by the base station
  • the RNC sends a handover instruction to the base station and the UE respectively, so that the base station and the UE perform the handover instruction.
  • the corresponding switch The base station adds, deletes, or replaces the wireless link according to the switching instruction.
  • U E updates the active set according to the switching instruction.
  • Step 204 can be implemented according to the prior art, and details are not described herein again.
  • the RNC reports the UE A comprehensive determination of the measurement report of the downlink channel of the UE and the measurement data of the uplink channel of the UE reported by the base station, so as to know whether the operation of deleting the radio link needs to be performed on the original cell, and only the downlink channel to the UE is compared to the prior art.
  • the measurement of the signal to determine the original cell the invention can reduce the call drop rate during handover in the scenario of uplink and downlink imbalance, and at the same time improve the user experience.
  • a cell handover method according to an embodiment of the present invention will be described from the perspective of a base station.
  • FIG. 3 is a schematic diagram of a cell handover method according to an embodiment of the present invention, which may be applied to a network system as shown in FIG. 1 and executed by a base station. As shown in FIG. 3, the cell switching method specifically includes the following steps:
  • the base station performs measurement on the uplink channel of the user equipment UE, and obtains measurement data of the uplink channel of the UE.
  • the base station can start the measurement according to the indication of the RNC and report it, or can report it periodically.
  • the method further includes: the base station receiving the indication message sent by the RNC; the indication message is used to instruct the base station to acquire the measurement data of the uplink channel of the UE. After receiving the indication message, the base station starts measurement of the uplink channel of the UE.
  • the base station can receive the indication message of the RNC through the private message interface and report the measurement data to the RNC.
  • the measurement data of the uplink channel of the UE reported by the base station may include an active set of the UE and an SIR of an uplink channel of each cell in the monitoring set.
  • the base station can also use the existing uplink dedicated measurement to obtain the signal-to-interference ratio deviation S IRerr of the active channel of the UE and the uplink channel of each cell in the monitoring set, and report the S IRerr as measurement data to the RNC, and the RNC calculates according to the SIRerr. SIR.
  • the base station reports the measurement data of the uplink channel of the UE to the radio network controller RNC, so that the RNC performs the handover decision according to the measurement data.
  • the measurement data of the uplink channel of the UE includes the activity of the UE.
  • the SIR or SIRerr of the uplink channel of each cell in the set and monitoring set may also include information such as related pilot energy.
  • the base station receives a handover instruction that is sent by the RNC after determining that the UE needs to switch.
  • the handover command received by the base station is related to a cell handover event. For example, when the cell handover event is an A event, the base station receives an instruction to increase the radio link. When the cell handover event is a 1 B event, the command received by the base station is an instruction to delete the wireless link. When the cell handover event is a 1 C event, the command received by the base station is an instruction to replace the wireless link.
  • the base station completes a link layer switching operation according to the handover instruction.
  • the switching operation of the link layer includes adding, deleting, or replacing a wireless link. For example, after the RNC sends a handover command to the base station to delete the radio link, the base station deletes the radio link between the UE and the original cell according to the handover command after receiving the handover command.
  • Step 304 can be implemented according to the prior art, and details are not described herein again.
  • the base station performs measurement on the uplink channel of the UE, obtains measurement data of the uplink channel of the UE, and reports the measurement data to the RNC, so that the RNC passes the downlink of the UE reported by the UE.
  • a comprehensive determination of the measurement report of the channel and the measurement data of the uplink channel of the UE reported by the base station so as to know whether the operation of deleting the radio link needs to be performed on the original cell, compared with the prior art only by measuring the downlink channel signal of the UE.
  • the present invention can reduce the call drop rate during handover in a scenario where the uplink and downlink are unbalanced, and at the same time improve the user experience.
  • FIG. 4 provides a cell handover method according to an embodiment of the present invention, which can be applied to a network system as shown in FIG. 1.
  • the cell 1 and the cell 2 are the active set cells of the UE.
  • a relative threshold deletion event 1 B event is triggered, where the 1 B event belongs to Delete link events.
  • the cell handover method specifically includes the following steps:
  • the radio network controller RNC receives the measurement report reported by the user equipment UE. After the UE enters the CELL DCH connection mode, the RNC can send measurements to the UE. Control signaling, instructing the UE to measure the cell quality and perform a cell handover event report. The measurement control signaling includes a trigger threshold of a cell handover event. After receiving the measurement control signaling, the UE starts measuring Ec/NO or RSCP of the downlink channel of each cell in the UE active set and the monitoring set.
  • the above downlink channel signal quality includes but is not limited to: Ec/NO or RSCP, and Ec/NO or RSCP here is just one possible example.
  • the UE reports a 1 B event measurement report to the RNC.
  • the triggering condition of the 1 B event may be as follows:
  • the downlink pilot signal strength Ec/Io of the cell 1 is weakly equal to or less than (preferably the pilot Ec/Io - (reporting threshold + deleting the hysteresis threshold)), and maintaining ⁇ Time.
  • the best pilot refers to the pilot with the strongest signal in the active set, and the pilot of the cell 2 is the strongest pilot.
  • the RNC After receiving the measurement report reported by the UE, the RNC recognizes that the measurement report is a 1 B event measurement report, and then performs step 402.
  • step 402 After receiving the measurement report reported by the UE, the RNC recognizes that the measurement report is a 1 B event measurement report, and then performs step 402. If it is a cell handover event that does not require the quality of the uplink channel, step 402 may be omitted and processed according to the prior art.
  • the base station can report the measurement data of the uplink channel of the UE to the RNC according to whether the base station actively reports the measurement data or passively reports the measurement data.
  • the first implementation manner is:
  • the base station passively reports the measurement data of the uplink channel of the UE according to the indication of the RNC.
  • the process includes:
  • the RNC sends an indication message to the base station.
  • the foregoing indication message is used to instruct the base station to acquire measurement data of an uplink channel of the UE.
  • the RNC may send the information through a private message interface between the RNC and the base station.
  • 402a2 The base station performs measurement on the uplink channel of the UE according to the indication information, to obtain measurement data of the uplink channel of the UE.
  • the measurement data of the uplink channel of the UE includes, but is not limited to, an uplink channel signal quality of each cell in the active set and the monitoring set, and associated pilot energy; and the uplink channel signal quality is generally represented by an SIR.
  • the base station reports the measurement data of the uplink channel of the UE to the RNC.
  • the base station when the base station reports the measurement data of the uplink channel of the UE to the RNC, the base station may report the information through the private message interface between the RNC and the base station.
  • the second implementation manner The base station actively reports the measurement data of the uplink channel of the UE.
  • the process specifically includes:
  • the base station measures the uplink channel of the UE, and obtains measurement data of the uplink channel of the UE.
  • the measurement data of the uplink channel of the UE includes, but is not limited to, an uplink channel signal quality of each cell in the active set and the monitoring set, and associated pilot energy; and the uplink channel signal quality is generally represented by an SIR.
  • the base station actively reports the measurement data of the uplink channel of the UE.
  • the base station reports the measurement data of the uplink channel of the UE to the RNC at a specific time threshold or a period threshold.
  • the RNC performs a handover decision based on the measurement information of the >3 ⁇ 4 on the UE and the measurement data of the upper and lower channels of the UE.
  • the execution condition of the deletion link event is that the number of cells in the active set of the UE is greater than one.
  • the activity of the UE is concentrated in the cell 1 and the cell 2. Therefore, after receiving the 1 B event, the RNC determines that the number of cells in the active set of the UE is greater than 1, and satisfies the execution condition of the 1 B event.
  • the RNC also obtains the signal-to-interference ratio SIR of the uplink channel of the cell 1 and the cell 2 from the measurement data, and determines whether the ratio of the SIR of the uplink channel of the UE in the cell 2 to the SIR of the uplink channel of the UE in the cell 1 reaches a preset threshold.
  • the preset threshold is used as a customized cell-level parameter for network optimization. Configure according to the network environment.
  • the RNC needs to first convert the SIRERR value into The SIR value is then used to perform a handover decision based on the converted SIR value.
  • the RNC converting the SIRERR value to the SIR value includes: the RNC substituting the SIRERR values of the uplink channel signals of the one or all cells reported by the base station into the conversion formulas of SIRERR and SIR, respectively, thereby obtaining an uplink channel of each cell.
  • the RNC After determining that the number of cells in the current active set is greater than 1, and the uplink channel of the cell 2 is still in a trusted range, the RNC considers that the handover is required, that is, the RNC considers that the radio link of the cell 1 can be deleted. If the number of cells in the current active set is not greater than 1, or the uplink channel signal quality of the cell 2 is still in an untrusted range, it is determined that the cell handover is not performed, that is, the radio link of the cell 1 is not deleted.
  • the RNC sends a handover instruction to the base station and the UE to instruct the base station to delete the link of the original cell, and instruct the UE to update the active set to complete the handover.
  • the base station and the UE respectively send a handover instruction, so that after receiving the handover instruction, the base station deletes the radio link between the UE and the cell 1 according to the handover instruction, And let the UE update the active set according to the switching instruction.
  • the base station deletes the link of the UE in the original cell according to the handover instruction, and switches the UE to the target cell.
  • the base station after receiving the handover command, deletes the radio link between the UE and the cell 1 according to the handover instruction.
  • the UE updates the active set according to the handover instruction.
  • the UE After receiving the handover command sent by the RNC, the UE deletes the cell 1 from the active set.
  • the RNC obtains a comprehensive determination of the measurement report of the downlink channel of the UE reported by the UE and the measurement report of the uplink channel of the UE reported by the base station, so as to know whether the original cell needs to be deleted.
  • the operation of the road is compared with the prior art only by the measurement of the downlink channel signal of the UE to determine the original cell.
  • the present invention can reduce the call drop rate during handover in the scenario of uplink and downlink imbalance, and improve the user experience. .
  • An embodiment of the present invention provides a cell handover method, which can be applied to a network system as shown in FIG. 1.
  • a UE comprehensively determines a downlink channel measurement result of the UE and an uplink power control word of the UE.
  • the cell handover method specifically includes the following steps:
  • the UE measures the signal quality of the downlink channel.
  • the UE may start measuring after receiving the measurement control signaling sent by the RNC.
  • the measurement is to measure the downlink channel of the UE, including measuring the signal quality of the UE's active set and the downlink channel of each cell in the monitoring set.
  • it can be a measurement of Received Signal Code Power (RSCP) or pilot strength Ec/Io.
  • RSCP Received Signal Code Power
  • Ec/Io pilot strength
  • step 501 can be implemented by using the prior art, and details are not described herein again.
  • the UE acquires an uplink power control word of the original cell and the target cell.
  • the triggering condition of the cell handover event may be an event trigger threshold specified in the measurement control signaling delivered by the RNC. Whether or not the trigger condition of the cell handover event is satisfied can be determined according to the prior art.
  • the UE after measuring that the cell signal quality meets the triggering condition of the cell handover event, the UE further determines the uplink power control word of the original cell and the target cell to determine whether the uplink quality of the target cell is trusted.
  • the uplink power control is used to control the transmit power of the UE, and the uplink power control word is used to represent the uplink power control, and the uplink power control word can determine the uplink channel signal.
  • the quality is good or bad.
  • the uplink power control word in the embodiment of the present invention may be in an uplink channel.
  • the value range of the uplink power control word is generally: 0 to 30.
  • the uplink power control is in the range of 0 to 15, the signal quality of the uplink channel is good, and when the uplink power control is performed, When the word rises to the range of 15 to 30, it indicates that the signal received by the uplink channel is of poor quality. That is to say, the smaller the value of the uplink power control word, the better the signal quality of the channel. Therefore, based on the above concept, the UE can determine the uplink channel signal quality of the original cell and the target cell by using the uplink power control word, and further determine whether the uplink channel of the UE in the target cell is in a trusted range.
  • the UE determines that the UE's uplink channel in the target cell is in a trusted range.
  • the UE If the UE is in the trusted range of the uplink channel of the target cell, the UE reports a measurement report including the cell handover event to the radio network controller RNC.
  • the RNC may perform a handover decision according to the measurement.
  • the RNC performs the handover decision process and the handover execution after the handover decision can be implemented by using the prior art.
  • the RNC sends a handover command to the base station and the UE.
  • the base station adds, deletes, or replaces the radio link according to the handover indication.
  • the UE updates the existing active set according to the switching instruction.
  • the UE compares the obtained uplink power control words of the original cell and the target cell with the downlink channel signal quality of the original cell and the target cell, and determines, according to the comparison result, the UE If the uplink channel of the target cell is in a trusted range, if the UE is in the trusted range of the uplink channel of the target cell, the UE reports a measurement report of the packet cell handover event to the radio network controller RNC.
  • the embodiment of the present invention reports the measurement report only when the uplink channel of the target cell is trusted. Therefore, even if the RNC 1 1 performs the handover decision without considering the quality of the uplink channel, the handover will not be caused.
  • the invention can be up and down The unbalanced scenario reduces the call drop rate during handover and improves the user experience.
  • the embodiment of the present invention further provides a corresponding device to implement the cell handover method provided by the embodiment of the present invention.
  • An embodiment of the present invention provides a radio network controller RNC, which is used to implement the cell handover method shown in the foregoing embodiments of FIG. 2 and FIG. 4, its working mechanism, interaction with other network elements, and related technical terms.
  • RNC radio network controller
  • the RNC 6 includes: a receiving unit 61, an obtaining unit 62, a determining unit 63, and a switching unit 64, where:
  • the receiving unit 61 is configured to receive a measurement report reported by the user equipment UE.
  • the obtaining unit 62 is configured to acquire measurement data obtained by the base station measuring the uplink channel of the UE.
  • the determining unit 63 is configured to perform a handover decision based on the measurement report received by the receiving unit 61 and the measurement data acquired by the acquiring unit 62.
  • the switching unit 64 is configured to complete cell handover by interacting with the base station and the UE when the decision result of the determining unit 63 is that the UE needs to perform handover.
  • the RNC provided by the embodiment of the present invention obtains a comprehensive determination of the measurement report of the downlink channel of the UE reported by the UE and the measurement report of the uplink channel of the UE reported by the base station, so as to know whether to perform cell handover, compared with the prior art.
  • the determination of the original cell by the measurement of the downlink channel signal of the UE, the present invention can reduce the call drop rate during handover in a scenario where the uplink and downlink are unbalanced, and at the same time improve the user experience.
  • the determining unit 63 includes: a first determining module 63 1 , a second determining module 632 , and a determining module 633 ; the measurement report includes a cell switching event.
  • the first judging module 63 1 is configured to determine whether an execution condition of the cell handover event is satisfied.
  • the cell handover event is a delete link event
  • the cell handover event is performed under the condition that the number of cells in the active set of the UE is greater than 1.
  • a second determining module 632 configured to determine, according to the measurement data, that the UE is in the target cell Whether the upstream channel is in the trusted range.
  • the determining module 633 is configured to determine, in the first determining module, that an execution condition of the cell handover event is met, and the second determining module 632 determines that the UE needs to switch when the uplink channel of the target cell is in a trusted range.
  • the second determining module 632 is specifically configured to: obtain, according to the measurement data, a signal to interference ratio SIR of the uplink channel of the UE in the target cell and the original cell, and determine an SIR and an uplink channel of the UE in the target cell. Whether the ratio of the SIR of the uplink channel of the UE in the original cell reaches a preset threshold. If the preset threshold is reached, the uplink channel of the UE in the target cell is in a trusted range.
  • the measurement data of the uplink channel of the UE may include a signal to interference ratio SIR or a signal to interference ratio deviation SIRerr of the active channel of the UE and the uplink channel of each cell in the monitoring set.
  • the second judging module 632 can obtain the SIRs of the original cell and the target cell directly from the measurement data. Alternatively, the second judging module 632 may also obtain the SIRrr of the original cell and the target cell from the measurement data, and then obtain the SIR through calculation.
  • the specific calculation process may refer to the method part, and details are not described herein again.
  • the obtaining unit 62 includes: an indication sending module 621 and a data receiving module 622, where:
  • the indication module 621 is configured to send an indication message to the base station.
  • the foregoing indication message is used to instruct the base station to acquire measurement data of an uplink channel of the UE.
  • the data receiving module 622 is configured to receive measurement data that is reported by the base station after performing measurement on the uplink channel of the UE according to the indication message.
  • the RNC provided by the embodiment of the present invention obtains a comprehensive determination of the measurement report of the downlink channel of the UE reported by the UE and the measurement report of the uplink channel of the UE reported by the base station, so as to know whether the cell handover needs to be performed, compared to the prior art.
  • the determination of the original cell by the measurement of the downlink channel signal of the UE only reduces the call drop rate during handover in the scenario of uplink and downlink imbalance, and improves the user experience.
  • An embodiment of the present invention provides a base station, where the RNC is used to implement the cell handover method shown in the foregoing embodiments of FIG. 3 to FIG. 4, its working mechanism, interaction with other network elements, related technical terms, concepts, and the like. Reference may be made to the embodiment shown in Figures 3 to 4.
  • the base station 7 includes: a measuring unit 71, a reporting unit 72, a receiving unit 73, and a switching unit 74, where:
  • the measuring unit 71 is configured to measure the uplink channel of the user equipment UE, and obtain measurement data of the uplink channel of the UE.
  • the reporting unit 72 is configured to report the measurement data of the uplink channel of the UE measured by the measurement unit 71 to the radio network controller RNC, so that the RNC performs the handover decision according to the measurement data.
  • the receiving unit 73 is configured to receive a switching instruction that is sent by the RNC after determining that the UE needs to switch.
  • the switching unit 74 is configured to complete a switching operation of the link layer according to the switching instruction received by the receiving unit 73.
  • the receiving unit 73 is further configured to receive the indication message sent by the RNC.
  • the foregoing indication message is used to instruct the base station to acquire measurement data of an uplink channel of the UE.
  • the measuring unit 71 after receiving the indication message received by the receiving unit 73, performs the above operation of measuring the uplink channel of the UE.
  • the measurement data of the uplink channel of the UE includes the signal interference ratio SIR or the signal-to-interference ratio deviation SIRerr of the active channel of the UE and the uplink channel of each cell in the monitoring set.
  • the base station provided by the embodiment of the present invention, the base station performs measurement on the uplink channel of the UE, obtains measurement data of the uplink channel of the UE, and reports the measurement data to the RNC, so that the RNC passes the downlink channel of the UE reported by the UE.
  • An embodiment of the present invention provides a user equipment UE, where the UE is used to implement the cell handover method shown in the foregoing embodiment of FIG. 5, and the working mechanism, interaction with other network elements, related technical terms, concepts, and the like may be Refer to the embodiment shown in FIG. 5.
  • the UE 8 includes: a measuring unit 81, an obtaining unit 82, a judging unit 83, and a reporting unit 84, where:
  • the measuring unit 81 is configured to measure the signal quality of the downlink channel.
  • the obtaining unit 82 is configured to obtain an uplink power control word of the original cell and the target cell when the measured result of the measurement unit 81 satisfies the trigger condition of the cell handover event.
  • the determining unit 83 is configured to determine, by comparing the uplink power control words of the original cell and the target cell, whether the uplink channel of the UE in the target cell is in a trusted range.
  • the reporting unit 84 is configured to: after the determining unit 83 determines that the UE is in the trusted range of the uplink channel of the target cell, report the measurement report including the cell handover event to the radio network controller RNC.
  • the determining unit 83 is specifically configured to: compare the size of the uplink power control word of the original cell and the target cell, and determine that the UE is in the destination if the uplink power control word of the original cell is greater than the uplink power control word of the target cell
  • the uplink channel of the cell is in a trusted range.
  • the UE provided by the embodiment of the present invention compares the obtained uplink power control words of the original cell and the target cell with the downlink channel signal quality of the original cell and the target cell, and determines the UE according to the comparison result. If the uplink channel of the cell is in a trusted range, if the UE is in the trusted range of the uplink channel of the target cell, the UE reports a measurement report including the cell handover event to the radio network controller RNC. Compared with the prior art, the embodiment of the present invention reports the measurement report only when the uplink channel of the target cell is trusted. Therefore, even if the RNC 1 1 performs the handover decision without considering the quality of the uplink channel, the handover will not be caused. After the call drop.
  • the invention can reduce the call drop rate during handover in the scenario of uplink and downlink imbalance, and at the same time improve the user experience.
  • the radio network controller RNC provided by the embodiment of the present invention may be referred to the embodiment shown in FIG. 2 and FIG. 4 for the specific working principle of the radio network controller RNC, the interaction with other network elements, related technical terms, concepts, and the like. .
  • the RNC includes: a communication interface 91 and a processor 92, wherein:
  • the communication interface 91 is configured to communicate with an external network element.
  • the processor 92 is configured to:
  • the communication interface 91 acquires measurement data obtained by the base station to measure the uplink channel of the UE.
  • the handover decision is performed based on the measurement report reported by the UE and the measurement data of the uplink channel of the UE.
  • the cell handover is completed by interacting with the base station and the UE through the communication interface 91.
  • the measurement report includes a cell handover event
  • the processor 92 performs the handover decision based on the measurement report reported by the UE and the measurement data of the uplink channel of the UE, where the processor 92 is configured to: determine whether the execution condition of the cell handover event is met. And determining, according to the measurement data, whether the uplink channel of the UE in the target cell is in a trusted range; determining that the execution condition of the cell handover event is satisfied and the UE is in the trusted range of the uplink channel of the target cell, determining that the handover is required.
  • the execution condition of the cell handover event is that the number of cells in the active set of the UE is greater than 1.
  • the processor 92 determines, according to the measurement data, whether the uplink channel of the UE in the target cell is in the trusted range, and the processor 92 is configured to: obtain, according to the measurement data, signal interference of the uplink channel of the UE in the target cell and the original cell. Comparing SIR, determining that the SIR of the uplink channel of the UE in the target cell is smaller than the UE in the original Whether the ratio of the SIR of the uplink channel of the area reaches a preset threshold. If the preset threshold is reached, the uplink channel of the UE in the target cell is in a trusted range.
  • the obtaining, by the processor 92, the measurement data obtained by the base station to measure the uplink channel of the UE by using the communications interface 91 the method is specifically configured to: the processor 92 is configured to send, by using the communication interface 91, an indication message to the base station, where the foregoing indication message is used by The measurement data is obtained by instructing the base station to acquire the uplink channel of the UE; and receiving, by the communication interface 91, the measurement data that is reported by the base station after measuring the uplink channel of the UE according to the indication message.
  • the measurement data of the uplink channel of the UE may include a signal to interference ratio SIR or a signal to interference ratio deviation SIRerr of the active channel of the UE and the uplink channel of each cell in the monitoring set.
  • the processor 92 can obtain the SIRs of the original cell and the target cell directly from the measurement data. Alternatively, the processor 92 may obtain the SIRrr of the original cell and the target cell from the measurement data, and then obtain the SIR through calculation. For the specific calculation process, refer to the method part, which is not described here.
  • the RNC provided by the embodiment of the present invention obtains a comprehensive determination of the measurement report of the downlink channel of the UE reported by the UE and the measurement report of the uplink channel of the UE reported by the base station, so as to know whether the cell handover needs to be performed, compared to the prior art.
  • the determination of the original cell by the measurement of the downlink channel signal of the UE only reduces the call drop rate during handover in the scenario of uplink and downlink imbalance, and improves the user experience.
  • the base station S 10 includes: a communication interface S 101 and a processor S 102 , where:
  • the communication interface S 101 is configured to communicate with an external network element.
  • the processor S 102 is configured to: The uplink channel of the user equipment UE is measured, and the measurement data of the uplink channel of the UE is obtained.
  • the measurement data of the uplink channel of the UE is reported to the wireless network controller RNC through the communication interface S101, so that the RNC performs the handover decision according to the measurement data.
  • the switching instruction sent by the RNC after determining that the UE needs to switch is received through the communication interface S101.
  • the link layer switching operation is completed according to the switching instruction.
  • the processor S 102 is further configured to: receive, by using the communication interface S 101, an indication message sent by the RNC.
  • the foregoing indication message is used to instruct the base station to acquire measurement data of an uplink channel of the UE.
  • the measurement data of the uplink channel of the UE includes the signal interference ratio SIR or the signal-to-interference ratio deviation SIRerr of the active channel of the UE and the uplink channel of each cell in the monitoring set.
  • the base station provided by the embodiment of the present invention, the base station performs measurement on the uplink channel of the UE, obtains measurement data of the uplink channel of the UE, and reports the measurement data to the RNC, so that the RNC passes the downlink channel of the UE reported by the UE.
  • the measurement report and the comprehensive determination of the measurement data of the uplink channel of the UE reported by the base station so as to know whether the cell handover is required, and the determination of the current cell by only the measurement of the downlink channel signal of the UE compared to the prior art, the present invention It can reduce the call drop rate during handover in the scenario of unbalanced uplink and downlink, and improve the user experience.
  • the UE includes: a communication interface 1 1 1 and a processor 1 12, where: The communication interface 1 1 1 is configured to communicate with an external network element.
  • Processor 1 12 for:
  • the signal quality of the downlink channel is measured.
  • the uplink power control words of the original cell and the target cell are obtained.
  • the uplink channel of the UE in the target cell is in a trusted range.
  • the measurement report including the cell handover event is reported to the radio network controller RNC through the communication interface 111.
  • the processor 1 12 compares the uplink power control words of the original cell and the target cell to determine whether the uplink channel of the UE in the target cell is in a trusted range, where the processor 1 12 is configured to compare the If the uplink power control word of the original cell is larger than the uplink power control word of the target cell, the uplink channel of the target cell is determined to be in a trusted range.
  • the UE provided by the embodiment of the present invention compares the obtained uplink power control words of the original cell and the target cell with the downlink channel signal quality of the original cell and the target cell, and determines the UE according to the comparison result. If the uplink channel of the cell is in a trusted range, if the UE is in the trusted range of the uplink channel of the target cell, the UE reports a measurement report including the cell handover event to the radio network controller RNC. Compared with the prior art, the embodiment of the present invention reports the measurement report only when the uplink channel of the target cell is trusted. Therefore, even if the RNC 1 1 performs the handover decision without considering the quality of the uplink channel, the handover will not be caused. After the call drop.
  • the invention can reduce the call drop rate during handover in the scenario of uplink and downlink imbalance, and at the same time improve the user experience.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM, Random A variety of media that can store program code, such as Access Memory), disk, or optical disk.
  • ROM read-only memory
  • RAM random access memory
  • the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto.
  • the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

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Abstract

 本发明公开了一种小区切换方法、设备及系统,涉及通信领域,能够在上下行不平衡的情况下,降低切换时的掉话率。具体的实现方法包括:无线网络控制器RNC接收用户设备UE上报的测量报告;获取基站对所述UE的上行信道进行测量得到的测量数据;基于所述UE上报的测量报告和所述UE的上行信道的测量数据执行切换判决;在判决结果为需要切换时,通过与所述基站和所述UE交互完成小区切换。本发明应用于软切换。

Description

一种小区切换方法、 设备及网络系统 技术领域
本发明涉及通信领域, 尤其涉及一种小区切换方法、 设备及网 络系统。 背景技术
在现有无线通信系统中, 当两个邻近的小区之间的负载相差较 大时, 网络侧通常通过对小区的切换来主动调整各小区的负载, 从 而利用小区间的切换将负载较重小区的用户设备 ( User Equipment, UE ) 接入到负载较轻小区。 在现有技术中, 由于软切换能够使得用 户在越区的过程中通信不中断, 且链路新能较高, 因此, 现有的切 换一般釆用软切换, 而软切换通常指的是同频小区之间的切换。 其 中, 软切换的具体流程为: UE在网络侧的控制下完成对相邻小区下 行导频信号强度的测量, 并将生成的测量报告上报至无线网络控制 器 ( Radio Network Controller , RNC )。 RNC根据接收到的测量报告 对 UE 进行切换判决。 其中, 上述的切换判决包括决定是否增加、 删除或替换无线链路。 如果判决结果为执行切换, 则通过无线链路 增加, 或无线链路删除等过程完成切换。 否则, 则不增加、 删除或 替换无线链路, 并结束当前处理流程。 具体的, 上述的测量报告的 类型为事件报告, 包括对 1A、 1 B、 1 C、 1 D、 1 E、 I F等小区切换事 件的上报。 其中, 1A为相对门限增加事件, 表示一个小区的质量已 经接近最好小区或者活动集质量; 1 B为相对门限删除事件, 表示一 个小区的质量比最好小区或活动集质量差很多; 1 C为替换事件, 表 示一个小区已经比活动集的小区好; 1 D 为最好小区变化事件; 1 E 为测量值高于绝对门限事件; 1 F为测量值低于绝对门限事件。 RNC 可以根据各种事件或各种事件的组合对 UE 进行切换判决。 例如, 当 UE 检测到活动集中小区 1 的下行导频信号强度测量值与小区 2 的下行导频信号强度测量值的差值大于(报告门限 AS— Th+删除滞后 门限 AS— Th— Hyst ) 并持续 Δ T 时间时 , 进行 1 B事件报告。 其中, 小区 1 为活动集中下行导频信号强度最好的小区。 RNC 根据该 1 B 事件进行删除小区 2 的切换判决, 将小区 2移出活动集。 其中, 将 小区移出活动集的过程也就是删除该小区的无线链路的过程, 简称 删链。
在上述软切换过程中, UE 上报的测量报告仅仅依赖于 UE 对 下行信道的信号质量, 如, 接收信号码功率 ( Received Signal Code Power , RSCP )、 Ec/N0等的测量。 这样, 对于 1 B、 1 C这类会触发 删链操作的事件就会存在如下问题: 当原小区和目标小区这两个小 区上下行不平衡时, 即目标小区的链路上行信道质量差比原小区差, 但目标小区的链路下行信道比原小区上行质量好, 这样就导致满足 上报删除事件的条件而对原小区进行删链, 但同时在删除原小区链 路后, 由于目标小区的上行信道性能差, 从而导致 UE 在切换完成 之后掉话。 发明内容 本发明的实施例提供一种小区切换方法、 设备及网络系统, 能 够在上下行不平衡的情况下, 降低小区切换时的掉话率。
第一方面, 提供一种无线网络控制器 RNC , 包括:
接收单元, 用于接收用户设备 UE上报的测量报告;
获取单元, 用于获取基站对所述 UE的上行信道进行测量得到 的测量数据;
判决单元, 用于基于所述接收单元接收的测量报告和所述获取 单元获取的所述测量数据执行切换判决;
切换单元, 用于在所述判决单元的判决结果为需要切换时, 通 过与所述基站和所述 UE交互完成小区切换。
在第一方面的第一种可能的实现方式中, 所述测量报告中包括小 区切换事件; 所述判决单元包括:
第一判断模块, 用于所述小区切换事件的执行条件是否被满 足;
第二判断模块, 用于根据所述测量数据判断所述 UE在目 的小 区的上行信道是否处于可信范围;
判定模块, 用于在所述第一判断模块确定所述小区切换事件的 执行条件被满足, 且所述第二判断模块确定所述 UE 在所述目 的小 区的上行信道处于可信范围时, 则判定需要切换。
结合第一方面的第一种可能的实现方式, 在第一方面的第二种可能 的实现方式中:
所述第二判断模块具体用于: 根据所述测量数据获得所述 UE 在目 的小区和原小区的上行信道的信号干扰比 SIR ,判断所述 UE在 所述目的小区的上行信道的 SIR与所述 UE在所述原小区的上行信 道的 SIR 的比值是否达到预设门限, 若达到所述预设门限, 则所述 UE在所述目 的小区的上行信道处于可信范围。
第二方面, 提供一种基站, 包括:
测量单元, 用于对用户设备 UE的上行信道进行测量, 得到所 述 UE的上行信道的测量数据;
上报单元, 用于将所述测量单元测量到的所述 UE的上行信道 的测量数据上报至无线网络控制器 RNC ,以便所述 RNC根据所述测 量数据执行切换判决;
接收单元,用于接收所述 RNC在判定所述 UE需要切换后发送 的切换指令;
切换单元, 用于根据所述接收单元接收到的切换指令完成链路 层的切换操作。
在第二方面的第一种可能的实现方式中;
所述接收单元, 还用于接收所述 RNC 发送的指示消息; 其中 所述指示消息用于指示所述基站获取所述 UE 的上行信道的测量数 据; 所述测量单元, 在所述接收单元接收到的指示消息后, 执行所 述对所述 UE的上行信道进行测量的操作。
结合第二方面或第二方面的第一种可能的实现方式, 在第二方面的 第二种可能的实现方式中:
所述 UE的上行信道的测量数据包括所述 UE的活动集和监视 集中每个小区的上行信道的信号干扰比 SIR 或信号干扰比偏差 SIRerr。
第三方面, 提供一种用户设备 UE , 包括:
测量单元, 用于对下行信道的信号质量进行测量;
获取单元, 用于当所述测量单元测量到的结果满足小区切换事 件的触发条件时, 获取原小区和目 的小区的上行功控字;
判断单元, 用于通过对原小区和目的小区的上行功控字进行比 对判断所述 UE在所述目的小区的上行信道是否处于可信的范围; 上报单元, 用于在所述判断单元确定所述 UE在所述目的小区 的上行信道处于可信的范围后, 向无线网络控制器 RNC上报包含小 区切换事件的测量报告。
在第三方面的第一种可能的实现方式中:
所述判断单元具体用于: 比较所述原小区和所述目的小区的上 行功控字的大小, 若所述原小区的上行功控字大于所述目 的小区的 上行功控字, 则判定所述 UE 在所述目的小区的上行信道处于可信 的范围。
第四方面, 提供一种无线网络控制器 RNC , 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
通过所述通信接口接收用户设备 UE上报的测量报告; 通过所述通信接口获取基站对所述 UE的上行信道进行测量得 到的测量数据;
基于所示 UE上报的测量报告和所述 UE的上行信道的测量数 据执行切换判决; 在判决结果为需要切换时, 通过所述通信接口与所述基站以及 所述 UE交互完成小区切换。
第五方面, 提供一种基站, 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
对用户设备 UE的上行信道进行测量, 得到所述 UE的上行信 道的测量数据;
通过所述通信接口将所述 UE的上行信道的测量数据上报至无 线网络控制器 RNC , 以便所述 RNC 根据所述测量数据执行切换判 决;
通过所述通信接口接收所述 RNC在判定所述 UE需要切换后发 送的切换指令;
根据所述切换指令完成链路层的切换操作。
第六方面, 提供一种用户设备 UE , 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
对下行信道的信号质量进行测量;
当测量的结果满足小区切换事件的触发条件时, 获取原小区和 目的小区的上行功控字;
通过对原小区和目 的小区的上行功控字进行比对判断所述 UE 在所述目 的小区的上行信道是否处于可信的范围;
若所述 UE在所述目的小区的上行信道处于可信的范围, 则通 过所述通信接口向无线网络控制器 RNC上报包含小区切换事件的测 量报告。
第七方面, 提供一种小区切换方法, 包括:
无线网络控制器 RNC接收用户设备 UE上报的测量报告; 获取基站对所述 UE的上行信道进行测量得到的测量数据; 基于所述 UE上报的测量报告和所述 UE的上行信道的测量数 据执行切换判决; 在判决结果为需要切换时, 通过与所述基站和所述 UE交互完 成小区切换。
在第七方面的第一种可能的实现方式中,
所述测量报告包括小区切换事件;
所述基于所示 UE上报的测量报告和所述 UE的上行信道的测 量数据执行切换判决包括:
所述 RNC 判断所述小区切换事件的执行条件是否被满足, 以 及根据所述测量数据判断所述 UE 在目 的小区的上行信道是否处于 可信范围;
在确定所述小区切换事件的执行条件被满足且所述 UE在所述 目的小区的上行信道处于可信范围时, 判定需要切换。
结合第七方面的第一种可能的实现方式, 在第七方面的第二种可能 的实现方式中:
所述根据所述测量数据判断所述 UE在所述目 的小区的上行信 道是否处于可信范围具体包括:
根据所述测量数据获得所述 UE在目 的小区和原小区的上行信 道的信号干扰比 SIR , 判断所述 UE 在所述目 的小区的上行信道的 SIR与所述 UE在所述原小区的上行信道的 SIR的比值是否达到预设 门限, 若达到所述预设门限, 则所述 UE 在所述目 的小区的上行信 道处于可信范围。
第八方面, 提供一种小区切换方法, 包括:
基站对用户设备 UE的上行信道进行测量, 得到所述 UE的上 行信道的测量数据;
将所述 UE 的上行信道的测量数据上报至无线网络控制器 RNC , 以便所述 RNC根据所述测量数据执行切换判决;
所述基站接收所述 RNC在判定所述 UE需要切换后发送的切换 指令;
根据所述切换指令完成链路层的切换操作。
第九方面, 提供一种小区切换方法, 包括: 用户设备 UE对下行信道的信号质量进行测量;
当测量的结果满足小区切换事件的触发条件时, 所述 UE获取 原小区和目的小区的上行功控字;
通过对原小区和目 的小区的上行功控字进行比对判断所述 UE 在所述目 的小区的上行信道是否处于可信的范围;
若所述 UE在所述目的小区的上行信道处于可信的范围, 则所 述 UE向无线网络控制器 RNC上报包含所述小区切换事件的测量报 告, 以便所述 RNC根据所述小区切换事件执行切换判决。
在第九方面的第一种可能的实现方式中,
所述通过对原小区和目 的小区的上行功控字进行比对判断所 述 UE在目的小区的上行信道是否处于可信的范围具体包括:
比较所述原小区和所述目 的小区的上行功控字的大小, 若所述 原小区的上行功控字大于所述目 的小区的上行功控字, 则所述 UE 判定所述 UE在所述目 的小区的上行信道处于可信的范围。
本发明的实施例提供的小区切换方法、 设备及网络系统, 是在 对 UE 的下行信道的质量和上下信道的质量进行综合考虑的基础上 来实现小区切换, 相比于现有技术只通过对 UE 的下行信道信号的 测量来对原小区的判定, 本发明能够在上下行不平衡的场景下降低 切换时的掉话率, 同时提升了用户体验。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1 为本发明的实施例提供的实现小区切换的网络结构示意 图; 图 2 为本发明的实施例提供的一种小区切换方法的流程示意 图 3为本发明的实施例提供的另一种小区切换方法的流程示意 图 4为本发明的实施例提供的又一种小区切换方法的流程示意 图 5为本发明的实施例提供的再一种小区切换方法的流程示意 图 6为本发明的实施例提供的一种 RNC的结构示意图; 图 7为本发明的实施例提供的另一种 RNC的结构示意图; 图 8为本发明的实施例提供的一种基站的结构示意图; 图 9为本发明的实施例提供的一种用户设备的结构示意图; 图 10为本发明的另一实施例提供的一种 RNC的结构示意图; 图 1 1 为本发明的另一实施例提供的一种基站的结构示意图; 图 12 为本发明的另一实施例提供的一种用户设备的结构示意
具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
图 1是移动通信网络中实现小区切换的网络结构示意图。其中, 上述的移动通信网络可以是 2/3 G (第二代合作伙伴项目 ( The Second Generation , 简称 2G ) /第三代合作伙伴项目 ( The Third Generation Partnership Proj ect , 简称 3 G ) )网络, 也可以是 4G (第四代合作伙 伴项目 ) 网络或具有相似切换场景的其它网络。 如图 1 所示, 该移 动通信网络中包括网络系统 1和用户设备( User Equipment , UE ) 2。 其中, 网络系统 1 包括: 无线网络控制器( Radio Network Controller , RNC ) 1 1和基站 12。 需要说明的是, 图 1仅是示例性的说明, 在实 际组网中 RNC可以连接一个或多个基站。 本发明实施例中的切换可 以发生在同一个基站的小区间 (如图 1所示的小区 1和小区 2 ) , 也 可以发生在不同基站的小区间。 UE2与基站 12间的小区切换由与基 站 12相连的 RNC 1 1控制。
小区切换主要包括切换测量、 切换判决、 切换执行三个阶段。 其中, 切换测量阶段的测量结果作为切换判决的输入, 切换判决阶 段依据切换测量阶段的测量结果判断是否执行切换, 如果判决结果 为执行切换, 则进入切换执行阶段, 否则, 结束切换流程。
其中, 小区是一个逻辑概念, 根据基站的信号覆盖范围进行划 分, 一个基站可以有至少一个小区。 按照为 UE 提供服务的关系可 以将小区划分到活动集、 监视集或未列出集等集合中。 其中, 活动 集为当前服务小区的集合, 包括一个或多个正在为 UE 提供服务的 小区。 监视集为在监视下可能参与切换, 从而进入到 UE 活动集的 小区集合。 未列出集为未被列入活动集和监视集, 但可能成为切换 小区的小区集合。 其中, 执行切换的过程就是对 UE 的活动集或监 视集进行更新, 比如, 将小区质量已经接近最好小区或活动集质量 的小区增加到活动集中, 或者将活动集中质量比最好小区或活动集 质量差较多的小区移除活动集等。 这个过程包含一系列的信令过程, 是通过对无线链路进行增加、 删除或替换来完成。 其中, 无线链路 的替换操作是无线链路的增加和删除的组合。
基于图 1 所示的网络结构, 本发明实施例提供了两种方式来解 决在上下行不平衡场景下, 由于小区切换导致的掉话问题。
方式 1 : UE2在 RNC 1 1 的控制下对下行信道的信号质量进行 测量。在测量的结果满足小区切换事件的触发条件时,UE2向 RNC 1 1 上报测量报告。 在接收到 UE2的测量报告后, RNC 1 1进一步获取基 站对 UE2 的上行信道的测量数据, 基于 UE2 上报的测量报告以及 UE2 的上行信道的测量数据进行切换判决, 在判决出需要切换时, 执行切换。
其中, RNC 1 1 可以启动基站的上行专用测量来获取测量数据, 也可以釆用私有接口向基站 12 请求测量数据。 具体执行过程可以 是: RNC 11 向基站 12发送指示消息, 指示基站 12对 UE2的上行信 道进行测量, 并从基站 12 接收测量到的测量数据; 或者, 基站 12 主动上报对 UE2 的上行信道的测量数据, RNC 1 1 在接收到 UE2 的 测量报告后, 获取基站 12 最近一次上报的 UE2 的上行信道的测量 数据。
在此方式中, RNC 1 1 在执行切换判决的过程中进一步考虑了 UE2 在各小区的上行信道的质量, 避免了由于上下行不平衡导致切 换后掉话的问题。
方式 2 : UE2在 RNC 1 1 的控制下对下行信道的信号质量进行测 量。 在测量的结果满足小区切换事件的触发条件时, UE进一步获取 原小区和目的小区的上下功控字。 UE2 通过对原小区和目的小区的 上行功控字进行比对判断目 的小区的上行信道是否处于可信的范 围。 UE2仅在目的小区的上行信道处于可信的范围时, 向 RNC 1 1上 报测量报告。 RNC 1 1基于 UE2上报的测量报告进行切换判决, 在判 决出需要切换时, 执行切换。
在此方式中, UE2在上报测量报告前进一步的考虑目的小区和 原小区的上行信道质量, 仅在目 的小区的上行信道可信的情况下才 上报测量报告, 因此, 即使 RNC 1 1执行切换判决时不考虑上行信道 的质量, 也不会导致切换后掉话的问题。
上述方式一是通过对现有的 RNC 和基站进行改造, 来实现本 发明的目 的。 其中, 在 RNC 中增加了获取 UE的上行信道的测量数 据的功能以及在切换判决中对 UE 的上行信道的质量进行判断的功 能。在基站中则增加了对 UE的上行信道的质量进行测量以及向 RN C 上报测量到的数据的功能。 对于本发明实施例提供的 RNC和基站的 结构在将图 6 , 图 7 , 图 8 , 图, 10 , 图 1 1 部分进行详细介绍, 这里 不再赘述。
方式二是通过对现有的 UE进行改造, 来实现本发明的目的。 其中, 在 UE 中增加了对上下信道的质量判断的功能。 对于本发明 实施例提供的 UE的结构在将图 9 , 图 12部分进行详细介绍, 这里 不再赘述。 图 2为本发明的实施例提供小区切换方法, 可以应用在如图 1 所示的网络系统中并由无线网络控制 RNC来实现。 如图 2所示, 该 小区切换方法具体包括如下步骤:
201、无线网络控制器 RNC接收用户设备 UE上报的测量报告。 当 UE进入 CELL— DCH连接模式后, RNC可以向 UE下发测量 控制信令, 命令 UE对小区质量进行测量并进行小区切换事件报告。 其中, 测量控制信令中包括有小区切换事件的触发门限。 UE在接收 到该测量控制信令后开始测量, 并满足小区切换事件的触发门限时, 向 RNC上报测量报告。
通常情况下, 上述测量过程是对 UE的下行信道进行测量, 包 括对 UE 的活动集和监视集中每个小区的下行信道的信号质量进行 测量。 具体的, 可以是对接收信号码功率 ( Received Signal Code Power, RSCP ) 或导频强度 Ec/Io 的测量, 而这里的 RSCP或 Ec/Io 只是一种可能的示例。
本实施例中,步骤 201可釆用现有技术来实现,这里不再赘述。
202、 获取基站对 UE的上行信道进行测量得到的测量数据。 RN C获取基站对 U E的上行信道进行测量得到的测量数据的过 程具体可包括: RNC 向基站发送指示消息, 指示基站对 UE 的上行 信道进行测量, 并从基站接收测量到的测量数据。 或者, 基站定时 主动上报对 UE 的上行信道的测量数据, RNC在接收到 UE 的测量 报告后, 获取基站最近一次上报的 UE的上行信道的测量数据。
具体的, RNC在接收到 UE上报的测量报告后, 可以直接执行 步骤 202。 当然, RNC 也可以选择仅针对某类小区切换事件, 才对 目的小区上行信道质量做要求。 在此情况下, RNC在接收到测量报 告后, 首先识别测量报告中的小区切换事件是否是需要要求上行信 道质量的事件; 若是, 则执行步骤 202 ; 否则, 直接基于测量报告 进行切换判决。 例如, 本发明实施例可以对会触发删链操作的事件 增加对上行信道质量的要求。 RN C接收到测量报告后首先判定该测 量报告是否是会触发删链操作的事件报告, 若是, 则获取基站对 UE 的上行信道进行测量后所得到的测量数据。 需要说明的是, 为了描 述方便, 本发明实施例中将会触发删链操作的事件称为删除链路事 件。 其中, 删除链路事件具体可以是 3G网络中的软切换中的 1 B或 1 C事件等, 也可以是 4G网络中的软切换中的 B 1 事件等。
其中, 上述的 UE的上行信道的测量数据包括但不限于: 活动 集和监视集中每个小区的上行信道信号质量, 及相关导频能量; 而 上述的上行信道信号质量通常通过信号干扰比( Signalto Interference Ratio , SIR ) 来表示。
203、 RNC基于 UE 上>¾的测量 4艮告和 UE 的上下信道的测量 数据执行切换判决。
具体的, RNC基于 UE上>¾的测量 4艮告和 UE的上下信道的测 量数据执行切换判决的具体过程可包括: RNC判断小区切换事件的 执行条件是否被满足, 以及根据测量数据判断 UE 在目 的小区的上 行信道是否处于可信范围; 在确定小区切换事件的执行条件被满足 且 UE在所述目的小区的上行信道处于可信范围时, 判定需要切换。
其中, 小区切换事件的执行条件可釆用现有切换判决中的执行 条件。 RNC判断小区切换事件的执行条件是否被满足也可釆用现有 技术中的判决手段来判断。 比如, 当测量报告中的小区切换事件为 删除链路事件时, 可按照删除链路事件的现有判决流程执行对 UE 的活动集中的小区数目是否大于 1 的判断。 RNC确定 UE的活动集 中的小区数目 大于 1 , 则认为该删除链路事件的执行条件被满足。
RNC根据测量数据判断 UE在目 的小区的上行信道是否处于可 信范围具体可包括: RNC根据测量数据获得 UE在目的小区和原小 区的上行信道的信号干扰比 SIR ,判断 UE在目 的小区的上行信道的 SIR与 UE在原小区的上行信道的 SIR的比值是否达到预设门限,若 达到所述预设门限, 则认为 UE 在目的小区的上行信道处于可信范 围。
其中, UE 的上行信道的测量数据包括所述 UE 的活动集和监 视集中每个小区的上行信道的 SIR或信号干扰比偏差 SIRerr。 当测 量数据中包括的是 SIR时, RNC可以直接从测量数据中获得 UE在 目的小区和原小区的上行信道的 SIR。当测量数据中包括的是 SIRerr 时, RNC可以釆用 SIR=信号干扰比目标值 SIRtarget-SIRerr来计算 得到 UE在目 的小区和原小区的上行信道的 SIR。通常情况下 SIR是 指信号干扰比的测量值,而 SIRtarget是期望从 UE处接收的 SIR值。
需要说明的是, 原小区和目的小区可以是一个或多个。 比如, 在小区切换事件为 1A事件时, 则已在 UE的活动集中的小区为原小 区, 可以是一个或多个; 准备添加到活动集中的小区为 目 的小区。 而在小区切换事件为 1 B事件时,则准备从活动集中移除的小区为原 小区, 而活动集中剩余的小区为 目 的小区, 其中, 目 的小区可以是 一个或多个。 当原小区或目 的小区是多个时, 在获取 SIR 时, 可以 是多个小区的平均值, 或者取该多个小区中的最好 SIR或最差 SIR。 具体实现时, 可根据需要进行选择。
204、 当判决结果为 UE需要切换时, 通过与基站和 UE交互完 成小区切换。
具体的,当 RNC根据基站上报的 UE的上行信道的测量数据判 定需要进行删除无线链路操作时, 则 RNC向基站与 UE分别下发切 换指令, 以便基站和 UE 在接收到该切换指令后执行相应的切换。 其中, 基站会根据该切换指令进行无线链路的增加、 删除或替换。 U E在接收到该切换指令后, 会根据该切换指令更新活动集。
步骤 204可以按照现有技术来实现, 这里不再赘述。
本发明的实施例提供的小区切换方法, RNC通过对 UE上报的 UE的下行信道的测量报告和基站上报的 UE的上行信道的测量数据 的综合判定, 从而获知是否需要对原小区进行删除无线链路的操作, 相比于现有技术只通过对 UE 的下行信道信号的测量来对原小区的 判定, 本发明能够在上下行不平衡的场景下降低切换时的掉话率, 同时提升了用户体验。 与图 2所示的小区切换方法对应, 下面将从基站的角度来对本 发明实施例提供的一种小区切换方法进行说明。
图 3为本发明的实施例提供一种小区切换方法, 可以应用在如 图 1 所示的网络系统中, 并由基站来执行, 如图 3 所示, 该小区切 换方法具体包括如下步骤:
301、 基站对用户设备 UE的上行信道进行测量, 得到 UE的上 行信道的测量数据。
其中, 基站可以根据 RNC 的指示来启动测量并上报, 也可以 定时主动上报。
基站根据 RNC 的指示来启动测量并上报的时, 在步骤 301 之 前还可以进一步包括: 基站接收 RNC发送的指示消息; 该指示消息 用于指示基站获取 UE 的上行信道的测量数据。 基站接收到该指示 消息后启动对 UE的上行信道的测量。
基站可以通过私有消息接口接收 RNC的指示消息以及向 RNC 上报测量数据。
其中, 基站上报的 UE的上行信道的测量数据可以包括 UE的 活动集和监视集中每个小区的上行信道的 SIR。 基站也可以釆用现 有的上行专用测量得到 UE 的活动集和监视集中每个小区的上行信 道的信号干扰比偏差 S IRerr , 将 S IRerr作为测量数据上报给 RNC , 由 RNC根据该 SIRerr计算得到 SIR。
302、 基站将 UE 的上行信道的测量数据上报至无线网络控制 器 RNC , 以便 RNC根据测量数据执行切换判决。
其中, 上述的 UE的上行信道的测量数据除了包括 UE的活动 集和监视集中每个小区的上行信道的 SIR或 SIRerr , 还可以包括相 关导频能量等信息。
303、 基站接收 RNC在判定 UE需要切换后发送的切换指令。 其中, 基站接收到的切换指令与小区切换事件相关。 例如, 当 小区切换事件是 1 A事件时,基站接收到的指令为增加无线链路的指 令。 当小区切换事件是 1 B事件时, 基站接收到的指令为删除无线链 路的指令。 当小区切换事件是 1 C事件时, 基站接收到的指令为替换 无线链路的指令
304、 基站根据切换指令完成链路层的切换操作。
其中, 链路层的切换操作包括增加、 删除或替换无线链路。 例 如, RNC向基站下发切换指令为删除无线链路的指令, 则基站在接 收到该切换指令后, 根据该切换指令删除 UE 与原小区之间的无线 链路。
步骤 304可以按照现有技术来实现, 这里不再赘述。
本发明的实施例提供的小区切换方法, 基站对 UE的上行信道 进行测量, 得到该 UE 的上行信道的测量数据, 并将所述测量数据 上报给 RNC , 使得 RNC通过对 UE上报的 UE的下行信道的测量报 告和基站上报的 UE 的上行信道的测量数据的综合判定, 从而获知 是否需要对原小区进行删除无线链路的操作, 相比于现有技术只通 过 UE 的下行信道信号的测量来对当前小区的判定, 本发明能够在 上下行不平衡的场景下降低切换时的掉话率, 同时提升了用户体验。 图 4为本发明的实施例提供一种小区切换方法, 可以应用于如 图 1所示的网络系统中。 在本实施例中, 4叚设小区 1和小区 2为 UE 的活动集小区, 在 UE逐步远离小区 1 并靠近小区 2 的过程中, 触 发了相对门限删除事件 1 B事件, 其中 1 B事件属于删除链路事件。 该小区切换方法具体包括如下步骤:
401、无线网络控制器 RNC接收用户设备 UE上报的测量报告。 当 UE进入 CELL DCH连接模式后, RNC可以向 UE下发测量 控制信令, 命令 UE对小区质量进行测量并进行小区切换事件报告。 其中, 测量控制信令中包括有小区切换事件的触发门限。 UE在接收 到该测量控制信令后开始对 UE 活动集和监视集中每个小区的下行 信道的 Ec/NO或者 RSCP进行测量。 上述的下行信道信号质量包括 但不限于: Ec/NO或 RSCP , 而这里的 Ec/NO或 RSCP只是一种可能 的示例。
以 Ec/NO为例, 当 UE的活动集中的小区 1 的下行信道质量远 比当前最好小区 2的下行信道质量差的较多时, UE向 RNC上报 1 B 事件测量报告。 具体的, 1 B事件的触发条件可如下: 小区 1 的下行 导频信号强度 Ec/Io弱到等于或小于 (最好导频 Ec/Io - (报告门限 +删除滞后门限)), 并维持 Δ Τ时间。 其中, 最好导频是指活动集里 信号最强的导频,这里以小区 2的导频为最强导频进行说明。
RNC在接收到 UE上报的测量报告后,识别出该测量报告是 1 B 事件测量报告, 则执行步骤 402。
402-403、获取基站对 UE的上行信道进行测量后所得到的测量 数据。
RNC在接收到 UE上报的测量报告后,识别出该测量报告是 1 B 事件测量报告, 则执行步骤 402。 如果是对上行信道的质量无要求 的小区切换事件, 则可不执行步骤 402 , 而按现有技术进行处理。
其中, 可以根据基站是主动上报测量数据还是被动上报测量数 据, 将基站将 UE的上行信道的测量数据上报至 RNC分为两种实现 方式。
具体的, 第一种实现方式: 基站根据 RNC的指示被动上报 UE 的上行信道的测量数据。 该过程包括:
402al、 RNC向基站发送指示消息。
其中, 上述的指示消息用于指示基站获取 UE的上行信道的测 量数据。
可选的, 上述的 RNC 向基站发送指示消息的时候, 可以通过 RNC与基站间的私有消息接口进行发送。 402a2、 基站根据该指示信息对 UE的上行信道进行测量, 得到 UE的上行信道的测量数据。
其中, 上述的 UE的上行信道的测量数据包括但不限于: 活动 集和监视集中每个小区的上行信道信号质量, 及相关导频能量; 而 上述的上行信道信号质量通常通过 SIR来表示。
403 a , 基站将 UE的上行信道的测量数据上报至 RNC。
可选的,基站在向 RNC上报 UE的上行信道的测量数据的时候, 可以通过 RNC与基站间的私有消息接口进行上报。
第二种实现方式: 基站主动上报 UE的上行信道的测量数据。 该过程具体包括:
402b , 基站对 UE的上行信道进行测量, 得到 UE的上行信道 的测量数据。
其中, 上述的 UE的上行信道的测量数据包括但不限于: 活动 集和监视集中每个小区的上行信道信号质量, 及相关导频能量; 而 上述的上行信道信号质量通常通过 SIR来表示。
403b , 基站主动上报 UE的上行信道的测量数据。
具体的, 基站会在特定时间阈值或周期阈值向 RNC 上报 UE 的上行信道的测量数据。
404、 RNC基于 UE 上>¾的测量 4艮告和 UE 的上下信道的测量 数据执行切换判决。
由于删除链路事件的执行条件是 UE的活动集中的小区数目 大 于 1。而本实施例中, UE的活动集中有小区 1和小区 2 ,因此, RNC 接收到 1 B事件后, 判断 UE的活动集中的小区数目 大于 1 , 满足 1 B 事件的执行条件。
RNC还从测量数据中获得小区 1和小区 2的上行信道的信号干 扰比 SIR , 判断 UE在小区 2的上行信道的 SIR与 UE在小区 1 的上 行信道的 SIR 的比值是否达到预设门限, 若达到所述预设门限, 则 认为 UE在 2 小区的上行信道处于可信范围。 需要说明的是, 预设 门限是作为客户化的小区级参数以供网络优化时使用, 具体可以根 据网络环境进行配置。
此外,在 RNC根据 UE的上行信道的测量数据来执行切换判决 之前, 若 UE 的上行信道的测量数据中包含的是小区的上行信道信 号的 SIRERR值,则需要 RNC先将上述的 SIRERR值转换为 SIR值, 再根据转换后的 SIR 值来执行切换判决。 其中, 上述的 RNC 将 SIRERR值转换为 SIR值具体包括: RNC将上述基站上报的某个或 全部小区的上行信道信号的 SIRERR值分别代入 SIRERR与 SIR的 转换公式中, 从而得到各小区的上行信道信号的 SIR值。 具体的, 上 述 的 SIRERR 与 SIR 之 间 的 转 换 公 式 为 : SIR=SIRTARGET-SIRERR。
在确定当前活动集中的小区数目 大于 1 , 且小区 2的上行信道 还处于一个可信范围后, RNC认为需要切换, 即 RNC认为可以删除 小区 1 的无线链路。 而如果当前活动集中的小区数目不大于 1 , 或 者小区 2 的上行信道信号质量还处于一个不可信范围, 则判定不进 行小区切换, 即不删除小区 1 的无线链路。
405、 当判决结果为 UE 需要切换时, RNC 向基站与 UE 下发 切换指令指示基站删除原小区的链路, 以及指示 UE 更新活动集, 以完成切换。
具体的, 当 RNC判定需要进行切换时, 向基站与 UE分别下发 切换指令, 以使的基站在接收到该切换指令后, 根据该切换指令删 除 UE与小区 1之间的无线链路,, 并使 UE根据该切换指令更新活 动集。
406、 基站根据切换指令删除 UE在原小区的链路, 将 UE切换 到目 的小区。
具体的, 基站在接收到该切换指令后, 根据该切换指令删除 UE与小区 1之间的无线链路。
407、 UE根据切换指令更新活动集。
UE在接收到 RNC发送的切换指令后, 将小区 1从活动集中删 除。 本发明的实施例提供的小区切换方法, RNC通过对 UE上报的 UE的下行信道的测量报告和基站上报的 UE的上行信道的测量报告 的综合判定, 从而获知是否需要对原小区进行删除无线链路的操作, 相比于现有技术只通过 UE 的下行信道信号的测量来对原小区的判 定, 本发明能够在上下行不平衡的场景下降低切换时的掉话率, 同 时提升了用户体验。 本发明的实施例提供一种小区切换方法, 可以应用于如图 1所 示的网络系统, 在本实施例中, UE通过对 UE的下行信道的测量结 果和 UE 的上行功控字的综合判定, 来上报测量报告, 从而实现小 区的切换, 其中, 如图 5所示, 该小区切换方法具体包括如下步骤:
501、 用户设备 UE对下行信道的信号质量进行测量。
其中,UE可以在接收到 RNC下发的测量控制信令后开始测量。 通常情况下, 这里的测量是对 UE的下行信道进行测量, 包括对 UE 的活动集和监视集中每个小区的下行信道的信号质量进行测量。 具 体的, 可以是对接收信号码功率 ( Received Signal Code Power , RSCP ) 或导频强度 Ec/Io 的测量。 需要说明的是, 这里的 RSCP或 Ec/Io只是一种可能的示例。
本实施例中,步骤 501可釆用现有技术来实现,这里不再赘述。
502、 当测量的结果满足小区切换事件的触发条件时, UE获取 原小区和目的小区的上行功控字。
其中, 小区切换事件的触发条件可以是 RNC 下发的测量控制 信令中指定的事件触发门限。 可按照现有技术来确定是否满足小区 切换事件的触发条件。
本发明实施例中, UE 在测量到小区信号质量满足小区切换事 件的触发条件后, 还进一步对原小区和目 的小区的上行功控字进行 判断, 从而确定目 的小区的上行质量是否可信。
其中, 上述的上行功控用于控制 UE的发送功率, 而上述的上 行功控字用于表现上行功控, 从上行功控字可以判定上行信道信号 质量的好坏。 本发明实施例中的上行功控字可以是上行信道中的
TPC 字段。 具体的, 上行功控字的取值范围一般在: 0至 30 , 当该 上行功控将至 0至 15这个范围内时, 说明该上行信道接收到的信号 质量好, 而当该上行功控字升至 15 至 30这个范围内时, 说明该上 行信道接收到的信号质量差。 也就是说, 上行功控字的值越小, 信 道的信号质量越好。 因此, 基于上述概念, UE可以通过上行功控字 来判断原小区与目 的小区的上行信道信号质量, 进而判定 UE 在目 的小区的上行信道是否处于可信范围。
503、通过对原小区和目的小区的上行功控字进行比对判断 UE 在目 的小区的上行信道是否处于可信的范围。
具体的, 若原小区的上行功控字大于目 的小区的上行功控字, 则 UE判定 UE在目的小区的上行信道处于可信的范围。
504、 若 UE在目 的小区的上行信道处于可信的范围, 则 UE向 无线网络控制器 RNC上报包含小区切换事件的测量报告。
具体的, RNC在接收到 UE上报的测量报告后, 则可根据测量 才艮告进行切换判决。 在本实施例中, RNC进行切换判决的过程以及 切换判决后的切换执行都可釆用现有技术来实现。 在执行切换时, RNC会向基站和 UE发送切换指令, 基站在接收到 RNC发送的切换 指令后, 根据该切换指示对无线链路进行增加、 删除或替换操作。 而 UE在接收到 RNC发送的切换指令后, 根据该切换指令会更新现 有的活动集。
本发明的实施例提供的小区切换方法, UE 将获取到的原小区 和目 的小区的上行功控字与原小区与 目 的小区的下行信道信号质量 进行比对, 并根据该比对结果判断 UE 在目的小区的上行信道是否 处于可信的范围, 若 UE 在目 的小区的上行信道处于可信的范围, 则 UE向无线网络控制器 RNC上报包小区切换事件的测量报告。 相 比于现有技术, 本发明实施例仅在目 的小区的上行信道可信的情况 下才上报测量报告, 因此, 即使 RNC 1 1执行切换判决时不考虑上行 信道的质量, 也不会导致切换后掉话的问题。 本发明能够在上下行 不平衡的场景下降低切换时的掉话率, 同时提升了用户体验。 本发明实施例还提供相应的设备来实现本发明实施例提供的 小区切换方法。
本发明的实施例提供一种无线网络控制器 RNC , 该 RNC用于 实现上述图 2和图 4 的实施例所示的小区切换方法, 其工作机制、 与其他网元的交互、 相关的技术术语、 概念等内容可以参考图 2 和 图 4所示的实施例。 具体的, 如图 6所示, 该 RNC6 包括: 接收单 元 61、 获取单元 62、 判决单元 63和切换单元 64 , 其中:
接收单元 61 , 用于接收用户设备 UE上报的测量报告。
获取单元 62 , 用于, 获取基站对 UE的上行信道进行测量得到 的测量数据。
判决单元 63 , 用于基于接收单元 61接收的测量报告和获取单 元 62获取的测量数据执行切换判决。
切换单元 64 , 用于在判决单元 63 的判决结果为 UE需要切换 时, 通过与所述基站和所述 UE交互完成小区切换。
本发明的实施例提供的 RNC , 通过对 UE上报的 UE的下行信 道的测量报告和基站上报的 U E的上行信道的测量报告的综合判定, 从而获知是否进行小区切换, 相比于现有技术只通过 UE 的下行信 道信号的测量来对原小区的判定, 本发明能够在上下行不平衡的场 景下降低切换时的掉话率, 同时提升了用户体验。
可选的, 如图 7所示, 判决单元 63 包括: 第一判断模块 63 1、 第二判断模块 632 和判定模块 633 ; 测量报告中包括小区切换事件 其巾:
第一判断模块 63 1 , 用于判断小区切换事件的执行条件是否被 满足。
若小区切换事件为删除链路事件, 则所述小区切换事件的执行 条件为所述 UE的活动集中的小区数目 大于 1。
第二判断模块 632 , 用于根据测量数据判断 UE在目 的小区的 上行信道是否处于可信范围。
判定模块 633 , 用于在所述第一判断模块确定所述小区切换事 件的执行条件被满足, 且第二判断模块 632 确定 UE在目的小区的 上行信道处于可信范围时, 判定需要切换。
进一步可选的, 第二判断模块 632具体用于: 根据所述测量数 据获得所述 UE在目的小区和原小区的上行信道的信号干扰比 SIR, 判断 UE在目的小区的上行信道的 SIR与所述 UE在所述原小区的上 行信道的 SIR 的比值是否达到预设门限, 若达到所述预设门限, 则 所述 UE在所述目 的小区的上行信道处于可信范围。
具体的, UE 的上行信道的测量数据可包括所述 UE 的活动集 和监视集中每个小区的上行信道的信号干扰比 SIR或信号干扰比偏 差 SIRerr。 第二判断模块 632 可直接从测量数据中获得原小区和目 的小区的 SIR。 或者, 第二判断模块 632 也可以从测量数据中获得 原小区和目的小区的 SIRerr , 然后经过计算得到 SIR , 具体计算过 程可参考方法部分, 这里不再赘述。
可选的, 如图 7 所示, 获取单元 62 包括: 指示发送模块 621 和数据接收模块 622 , 其中:
指示模块 621 , 用于向基站发送指示消息。
其中, 上述的指示消息用于指示基站获取 UE的上行信道的测 量数据。
数据接收模块 622 , 用于接收基站根据该指示消息对 UE 的上 行信道进行测量后上报的测量数据。
本发明的实施例提供的 RNC , 通过对 UE上报的 UE的下行信 道的测量报告和基站上报的 U E的上行信道的测量报告的综合判定, 从而获知是否需要进行小区切换, 相比于现有技术只通过 UE 的下 行信道信号的测量来对原小区的判定, 本发明能够在上下行不平衡 的场景下降低切换时的掉话率, 同时提升了用户体验。
需要说明的是, 本发明以上各个实施例中的 RNC 中的各单元 的实现方式和交互过程可以参考相应方法实施例中的相关描述。 本发明的实施例提供一种基站, 该 RNC用于实现上述图 3 至 图 4 的实施例所示的小区切换方法, 其工作机制、 与其他网元的交 互、 相关的技术术语、 概念等内容可以参考图 3 至图 4所示的实施 例。 具体的, 如图 8所示, 该基站 7 包括: 测量单元 71、 上报单元 72、 接收单元 73和切换单元 74 , 其中:
测量单元 71 , 用于对用户设备 UE的上行信道进行测量, 得到 UE的上行信道的测量数据。
上报单元 72 , 用于将测量单元 71 测量到的 UE的上行信道的 测量数据上报至无线网络控制器 RNC ,以便 RNC根据测量数据执行 切换判决。
接收单元 73 , 用于接收 RNC在判定 UE需要切换后发送的切 换指令。
切换单元 74 , 用于根据接收单元 73接收到的切换指令完成链 路层的切换操作。
可选的, 接收单元 73 , 还用于接收 RNC发送的指示消息。 其中, 上述的指示消息用于指示基站获取 UE的上行信道的测 量数据。
测量单元 71 , 在接收到接收单元 73接收到的指示消息后, 执 行上述对所述 UE的上行信道进行测量的操作。
可选的, 上述的 UE的上行信道的测量数据包括 UE的活动集 和监视集中每个小区的上行信道的信号干扰比 SIR或信号干扰比偏 差 SIRerr。
本发明的实施例提供的基站, 该基站对 UE的上行信道进行测 量, 得到该 UE 的上行信道的测量数据, 并将所述测量数据上报给 RNC , 使得 RNC通过对 UE上报的 UE的下行信道的测量报告和基 站上报的 UE 的上行信道的测量数据的综合判定, 从而获知是否需 要进行小区切换, 相比于现有技术只通过 UE 的下行信道信号的测 量来对当前小区的判定, 本发明能够在上下行不平衡的场景下降低 切换时的掉话率, 同时提升了用户体验。
需要说明的是, 本发明以上各个实施例中的基站中的各单元的 实现方式和交互过程可以参考相应方法实施例中的相关描述。 本发明的实施例提供一种用户设备 UE , 该 UE 用于实现上述 图 5 的实施例所示的小区切换方法, 其工作机制、 与其他网元的交 互、 相关的技术术语、 概念等内容可以参考图 5 所示的实施例。 具 体的, 如图 9 所示, 该 UE8 包括: 测量单元 81、 获取单元 82、 判 断单元 83和上报单元 84 , 其中:
测量单元 81 , 用于对下行信道的信号质量进行测量。
获取单元 82 , 用于当测量单元 81测量到的结果满足小区切换 事件的触发条件时, 获取原小区和目的小区的上行功控字。
判断单元 83 ,用于通过对原小区和目 的小区的上行功控字进行 比对判断 UE在目 的小区的上行信道是否处于可信的范围。
上报单元 84 , 用于在判断单元 83确定 UE在目的小区的上行 信道处于可信的范围后, 向无线网络控制器 RNC上报包含小区切换 事件的测量报告。
可选的, 判断单元 83 具体用于: 比较所述原小区和所述目的 小区的上行功控字的大小, 若原小区的上行功控字大于目 的小区的 上行功控字, 则判定 UE在目的小区的上行信道处于可信的范围。
本发明的实施例提供的 UE , 该 UE 将获取到的原小区和目的 小区的上行功控字与原小区与 目 的小区的下行信道信号质量进行比 对, 并根据该比对结果判断 UE 在目的小区的上行信道是否处于可 信的范围, 若 UE在目的小区的上行信道处于可信的范围, 则 UE向 无线网络控制器 RNC上报包含小区切换事件的测量报告。 相比于现 有技术, 本发明实施例仅在目 的小区的上行信道可信的情况下才上 报测量报告, 因此, 即使 RNC 1 1执行切换判决时不考虑上行信道的 质量, 也不会导致切换后掉话的问题。 本发明能够在上下行不平衡 的场景下降低切换时的掉话率, 同时提升了用户体验。 需要说明的是, 本发明以上各个实施例中的 UE中的各单元的 实现方式和交互过程可以参考相应方法实施例中的相关描述。 本发明实施例提供的无线网络控制器 RNC ,其具体的工作原理 与其他网元的交互、 相关的技术术语、 概念等内容可以参考图 2 和 图 4所示的实施例, 此处不做赘述。
具体的, 如图 10所示, 该 RNC 包括: 通信接口 91 和处理器 92 , 其中:
通信接口 91 , 用于与外部网元进行通信。
处理器 92 , 用于:
通过通信接口 91接收用户设备 UE上报的测量报告.
通过该通信接口 91 获取基站对该 UE 的上行信道进行测量得 到的测量数据。
基于所示 UE上报的测量报告和 UE的上行信道的测量数据执 行切换判决。
在判决结果为需要切换时, 通过通信接口 91 与该基站以及该 UE进行交互完成小区切换。
其中, 测量报告包括小区切换事件, 处理器 92 基于所示 UE 上报的测量报告和 UE 的上行信道的测量数据执行切换判决具体包 括: 处理器 92用于, 判断小区切换事件的执行条件是否被满足以及 根据测量数据判断 UE 在目的小区的上行信道是否处于可信范围; 在确定所述小区切换事件的执行条件被满足且 UE 在目 的小区的上 行信道处于可信范围时, 则判定需要切换。
其中, 若小区切换事件为删除链路事件, 则所述小区切换事件 的执行条件为所述 UE的活动集中的小区数目 大于 1。
进一步可选的, 处理器 92 根据测量数据判断 UE在目 的小区 的上行信道是否处于可信范围具体包括: 处理器 92用于, 根据测量 数据获得 UE在目 的小区和原小区的上行信道的信号干扰比 SIR ,判 断所述 UE在所述目的小区的上行信道的 SIR与所述 UE在所述原小 区的上行信道的 SIR 的比值是否达到预设门限, 若达到所述预设门 限, 则所述 UE在所述目的小区的上行信道处于可信范围。
可选的, 处理器 92通过通信接口 91获取基站对 UE的上行信 道进行测量得到的测量数据具体包括: 处理器 92用于, 通过通信接 口 91 向基站发送指示消息; 其中, 上述的指示消息用于指示基站获 取 UE的上行信道的测量数据; 通过通信接口 91接收所述基站根据 所述指示消息对所述 UE 的上行信道进行测量后上报的所述测量数 据。
具体的, UE 的上行信道的测量数据可包括所述 UE 的活动集 和监视集中每个小区的上行信道的信号干扰比 SIR或信号干扰比偏 差 SIRerr。 处理器 92可直接从测量数据中获得原小区和目的小区的 SIR。 或者, 处理器 92也可以从测量数据中获得原小区和目的小区 的 SIRerr, 然后经过计算得到 SIR , 具体计算过程可参考方法部分, 这里不再赘述。
本发明的实施例提供的 RNC , 通过对 UE上报的 UE的下行信 道的测量报告和基站上报的 U E的上行信道的测量报告的综合判定, 从而获知是否需要进行小区切换, 相比于现有技术只通过 UE 的下 行信道信号的测量来对原小区的判定, 本发明能够在上下行不平衡 的场景下降低切换时的掉话率, 同时提升了用户体验。
需要说明的是, 本发明以上各个实施例中的 RNC 中的各单元 的实现方式和交互过程可以参考相应方法实施例中的相关描述。 本发明实施例提供的基站, 其具体的工作原理与其他网元的交 互、 相关的技术术语、 概念等内容可以参考图 3 至图 4所示的实施 例, 此处不做赘述。
具体的, 如图 1 1所示, 该基站 S 10包括: 通信接口 S 101和处 理器 S 102 , 其中:
通信接口 S 101 , 用于与外部网元进行通信。
处理器 S 102 , 用于: 对用户设备 UE的上行信道进行测量, 得到所述 UE的上行信 道的测量数据。
通过通信接口 S 101 将该 UE 的上行信道的测量数据上报至无 线网络控制器 RNC , 以便该 RNC根据测量数据执行切换判决。
通过通信接口 S 101接收所述 RNC在判定 UE需要切换后发送 的切换指令。
根据切换指令完成链路层的切换操作。
可选的, 处理器 S 102 , 还用于: 通过通信接口 S 101接收 RNC 发送的指示消息。
其中, 上述的指示消息用于指示基站获取 UE的上行信道的测 量数据。
可选的, 上述的 UE的上行信道的测量数据包括 UE的活动集 和监视集中每个小区的上行信道的信号干扰比 SIR或信号干扰比偏 差 SIRerr。
本发明的实施例提供的基站, 该基站对 UE的上行信道进行测 量, 得到该 UE 的上行信道的测量数据, 并将所述测量数据上报给 RNC , 使得 RNC通过对 UE上报的 UE的下行信道的测量报告和基 站上报的 UE 的上行信道的测量数据的综合判定, 从而获知是否需 要进行小区切换, 相比于现有技术只通过 UE 的下行信道信号的测 量来对当前小区的判定, 本发明能够在上下行不平衡的场景下降低 切换时的掉话率, 同时提升了用户体验。
需要说明的是, 本发明以上各个实施例中的基站中的各单元的 实现方式和交互过程可以参考相应方法实施例中的相关描述。 本发明实施例提供的用户设备 UE , 其具体的工作原理与其他 网元的交互、 相关的技术术语、 概念等内容可以参考图 5 所示的实 施例, 此处不做赘述。
具体的, 如图 12 所示, 该 UE 包括: 通信接口 1 1 1 和处理器 1 12 , 其中: 通信接口 1 1 1 , 用于与外部网元进行通信。
处理器 1 12 , 用于:
对下行信道的信号质量进行测量。
当测量结果满足小区切换事件的触发条件时, 获取原小区和目 的小区的上行功控字。
通过对原小区和目 的小区的上行功控字进行比对判断 UE在所 述目 的小区的上行信道是否处于可信的范围。
若 UE在所述目的小区的上行信道处于可信的范围, 则通过通 信接口 1 1 1向无线网络控制器 RNC上报包含小区切换事件的测量报 告。
可选的, 处理器 1 12过对原小区和目 的小区的上行功控字进行 比对判断 UE在目的小区的上行信道是否处于可信的范围具体包括: 处理器 1 12 用于, 比较所述原小区和所述目的小区的上行功控字的 大小, 若原小区的上行功控字大于所述目 的小区的上行功控字, 则 判定 UE在目 的小区的上行信道处于可信的范围。
本发明的实施例提供的 UE , 该 UE 将获取到的原小区和目的 小区的上行功控字与原小区与 目 的小区的下行信道信号质量进行比 对, 并根据该比对结果判断 UE 在目的小区的上行信道是否处于可 信的范围, 若 UE在目的小区的上行信道处于可信的范围, 则 UE向 无线网络控制器 RNC上报包含小区切换事件的测量报告。 相比于现 有技术, 本发明实施例仅在目 的小区的上行信道可信的情况下才上 报测量报告, 因此, 即使 RNC 1 1执行切换判决时不考虑上行信道的 质量, 也不会导致切换后掉话的问题。 本发明能够在上下行不平衡 的场景下降低切换时的掉话率, 同时提升了用户体验。
需要说明的是, 本发明以上各个实施例中的 UE中的各单元的 实现方式和交互过程可以参考相应方法实施例中的相关描述。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简 洁, 仅以上述各功能模块的划分进行举例说明, 实际应用中, 可以 根据需要而将上述功能分配由不同的功能模块完成, 即将装置的内 部结构划分成不同的功能模块, 以完成以上描述的全部或者部分功 能。 上述描述的系统, 装置和单元的具体工作过程, 可以参考前述 方法实施例中的对应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和方法, 可以通过其它的方式实现。 例如, 以上所描述的装置 实施例仅仅是示意性的, 例如, 所述模块或单元的划分, 仅仅为一 种逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单 元或组件可以结合或者可以集成到另一个系统, 或一些特征可以忽 略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直接耦 合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信 连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上 分开的, 作为单元显示的部件可以是或者也可以不是物理单元, 即 可以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据 实际的需要选择其中的部分或者全部单元来实现本实施例方案的目 的。
另外, 在本申请各个实施例中的各功能单元可以集成在一个处 理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以 上单元集成在一个单元中。 上述集成的单元既可以釆用硬件的形式 实现, 也可以釆用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立 的产品销售或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本申请的技术方案本质上或者说对现有技术做出 贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体 现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令 用以使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络 设备等) 或处理器 ( processor ) 执行本申请各个实施例所述方法的 全部或部分步骤。 而前述的存储介质包括: U 盘、 移动硬盘、 只读 存储器( ROM , Read-Only Memory )、随机存取存储器( RAM , Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。 以上所述, 以上实施例仅用以说明本申请的技术方案, 而非对 其限制; 尽管参照前述实施例对本申请进行了详细的说明, 本领域 的普通技术人员应当理解: 其依然可以对前述各实施例所记载的技 术方案进行修改, 或者对其中部分技术特征进行等同替换; 而这些 修改或者替换, 并不使相应技术方案的本质脱离本申请各实施例技 术方案的精神和范围。

Claims

权 利 要 求 书
1、 一种无线网络控制器 RNC , 其特征在于, 包括:
接收单元, 用于接收用户设备 UE上报的测量报告;
获取单元, 用于获取基站对所述 UE 的上行信道进行测量得到 的测量数据;
判决单元, 用于基于所述接收单元接收的测量报告和所述获取 单元获取的所述测量数据执行切换判决;
切换单元, 用于在所述判决单元的判决结果为需要切换时, 通 过与所述基站和所述 UE交互完成小区切换。
2、 根据权利要求 1所述的 RNC , 其特征在于, 所述测量报告中 包括小区切换事件;
所述判决单元包括:
第一判断模块, 用于判断所述小区切换事件的执行条件是否被 满足;
第二判断模块, 用于根据所述测量数据判断所述 UE 在目的小 区的上行信道是否处于可信范围;
判定模块, 用于在所述第一判断模块确定所述小区切换事件的 执行条件被满足, 且所述第二判断模块确定所述 UE在所述目的小区 的上行信道处于可信范围时, 判定需要切换。
3、 根据权利要求 2所述的 RNC , 其特征在于, 所述第二判断模 块具体用于: 根据所述测量数据获得所述 UE在目的小区和原小区的 上行信道的信号干扰比 SIR, 判断所述 UE在所述目的小区的上行信 道的 SIR与所述 UE在所述原小区的上行信道的 SIR的比值是否达到 预设门限, 若达到所述预设门限, 则所述 UE在所述目的小区的上行 信道处于可信范围。
4、 根据权利要求 2至 3任一项所述的 RNC , 其特征在于, 所述 小区切换事件为删除链路事件;
所述小区切换事件的执行条件为所述 UE 的活动集中的小区数 目大于 1。
5、 根据权利要求 1至 4任一项所述的 RNC , 其特征在于, 所述 UE 的上行信道的测量数据包括所述 UE 的活动集和监视集中每个小 区的上行信道的信号干扰比 SIR或信号干扰比偏差 SIRerr。
6、 根据权利要求 1至 5任一项所述的 RNC , 其特征在于, 所述 获取单元包括:
指示模块, 用于向所述基站发送指示消息; 其中所述指示消息 用于指示所述基站获取所述 UE的上行信道的测量数据;
数据接收模块, 用于接收所述基站根据所述指示消息对所述 UE 的上行信道进行测量后上报的所述测量数据。
7、 根据权利要求 1至 6任一项所述的 RNC , 其特征在于, 所述 UE 上报的测量报告是所述 UE 在测量到的活动集和监视集中的小区 的下行信道的接收信号码功率 RSCP或导频强度 Ec/Io满足小区切换 事件的触发条件后上报的。
8、 一种基站, 其特征在于, 包括:
测量单元, 用于对用户设备 UE 的上行信道进行测量, 得到所 述 UE的上行信道的测量数据;
上报单元, 用于将所述测量单元测量到的所述 UE 的上行信道 的测量数据上报至无线网络控制器 RNC , 以便所述 RNC根据所述测 量数据执行切换判决;
接收单元, 用于接收所述 RNC在判定所述 UE需要切换后发送 的切换指令;
切换单元, 用于根据所述接收单元接收到的切换指令完成链路 层的切换操作。
9、 根据权利要求 8所述的基站, 其特征在于;
所述接收单元, 还用于接收所述 RNC发送的指示消息; 其中所 述指示消息用于指示所述基站获取所述 UE的上行信道的测量数据; 所述测量单元在所述接收单元接收到的指示消息后, 执行所述 对所述 UE的上行信道进行测量的操作。
10、 根据权利要求 8 或 9 所述的基站, 其特征在于, 所述 UE 的上行信道的测量数据包括所述 UE的活动集和监视集中每个小区的 上行信道的信号干扰比 SIR或信号干扰比偏差 SIRerr。
1 1、 一种用户设备 UE , 其特征在于, 包括:
测量单元, 用于对下行信道的信号质量进行测量;
获取单元, 用于当所述测量单元测量到的结果满足小区切换事 件的触发条件时, 获取原小区和目的小区的上行功控字;
判断单元, 用于通过对原小区和目的小区的上行功控字进行比 对判断所述 UE在所述目的小区的上行信道是否处于可信的范围; 上报单元, 用于在所述判断单元确定所述 UE 在所述目的小区 的上行信道处于可信的范围后, 向无线网络控制器 RNC 上报包含所 述小区切换事件的测量报告。
12、 根据权利要 1 1 所述的 UE , 其特征在于, 所述判断单元具 体用于: 比较所述原小区和所述目的小区的上行功控字的大小, 若所 述原小区的上行功控字大于所述目的小区的上行功控字, 则判定所述 UE在所述目的小区的上行信道处于可信的范围。
13、 一种无线网络控制器 RNC , 其特征在于, 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
通过所述通信接口接收用户设备 UE上报的测量报告; 通过所述通信接口获取基站对所述 UE 的上行信道进行测量得 到的测量数据;
基于所示 U E上报的测量报告和所述 U E的上行信道的测量数据 执行切换判决;
在判决结果为需要切换时, 通过所述通信接口与所述基站以及 所述 UE交互完成小区切换。
14、 根据权利要求 13所述的 RNC , 其特征在于, 所述测量报告 包括小区切换事件;
所述处理器基于所示 UE上报的测量报告和所述 UE的上行信道 的测量数据执行切换判决具体包括: 所述处理器用于, 判断所述小区 切换事件的执行条件是否被满足; 以及根据所述测量数据判断所述
UE 在目的小区的上行信道是否处于可信范围; 在确定所述小区切换 事件的执行条件被满足且所述 U E在所述目的小区的上行信道处于可 信范围时, 则判定需要切换。
15、 根据权利要求 14所述的 RNC , 其特征在于,
所述处理器根据所述测量数据判断所述 UE 在目的小区的上行 信道是否处于可信范围具体包括: 所述处理器用于, 根据所述测量数 据获得所述 UE在目的小区和原小区的上行信道的信号干扰比 SIR, 判断所述 UE在所述目的小区的上行信道的 SIR与所述 UE在所述原 小区的上行信道的 S IR的比值是否达到预设门限, 若达到所述预设门 限, 则所述 UE在所述目的小区的上行信道处于可信范围。
16、 根据权利要求 13至 15任一项所述的 RNC , 其特征在于, 所述 UE的上行信道的测量数据包括所述 UE的活动集和监视集中每 个小区的上行信道的信号干扰比 SIR或信号干扰比偏差 SIRerr。
17、 根据权利要求 13至 16任一项所述的 RNC , 其特征在于, 所述小区切换事件为删除链路事件;
所述小区切换事件的执行条件为所述 UE 的活动集中的小区数 目大于 1。
18、 根据权利要求 13至 17任一项所述的 RNC , 其特征在于, 所述处理器通过所述通信接口获取基站对所述 UE 的上行信道 进行测量得到的测量数据具体包括: 所述处理器用于, 通过所述通信 接口向所述基站发送指示消息; 其中所述指示消息用于指示所述基站 获取所述 UE的上行信道的测量数据; 并通过所述通信接口接收所述 基站根据所述指示消息对所述 UE的上行信道进行测量后上报的所述 测量数据。
19、 根据权利要求 13至 18任一项所述的 RNC , 其特征在于, 所述 UE上报的测量报告是所述 UE在测量到活动集和监视集中的小 区的下行信道的接收信号码功率 RSCP或导频强度 Ec/Io满足小区切 换事件的触发条件后上报的。
20、 一种基站, 其特征在于, 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
对用户设备 UE的上行信道进行测量,得到所述 UE的上行信道 的测量数据;
通过所述通信接口将所述 UE 的上行信道的测量数据上报至无 线网络控制器 RN C ,以便所述 RN C根据所述测量数据执行切换判决; 通过所述通信接口接收所述 RNC在判定所述 UE需要切换后发 送的切换指令;
根据所述切换指令完成链路层的切换操作。
21、 根据权利要求 20所述的基站, 其特征在于, 所述处理器, 还用于: 通过所述通信接口接收所述 RNC 发送的指示消息; 其中所 述指示消息用于指示所述基站获取所述 UE的上行信道的测量数据。
22、 根据权利要求 20或 21所述的基站, 其特征在于, 所述 UE 的上行信道的测量数据包括所述 UE的活动集和监视集中每个小区的 上行信道的信号干扰比 SIR或信号干扰比偏差 SIRerr。
23、 一种用户设备 UE , 其特征在于, 包括:
通信接口, 用于与外部网元进行通信;
处理器, 用于:
对下行信道的信号质量进行测量;
当测量的结果满足小区切换事件的触发条件时, 获取原小区和 目的小区的上行功控字;
通过对原小区和目 的小区的上行功控字进行比对判断所述 UE 在所述目的小区的上行信道是否处于可信的范围;
若所述 UE 在所述目的小区的上行信道处于可信的范围, 则通 过所述通信接口向无线网络控制器 RNC 上报包含小区切换事件的测 量报告。
24、 根据权利要 23所述的 UE , 其特征在于,
所述处理器通过对原小区和目的小区的上行功控字进行比对判 断所述 UE 在所述目 的小区的上行信道是否处于可信的范围具体包 括: 所述处理器用于, 比较所述原小区和所述目的小区的上行功控字 的大小, 若所述原小区的上行功控字大于所述目 的小区的上行功控 字, 则判定所述 UE在所述目的小区的上行信道处于可信的范围。
25、 一种小区切换方法, 其特征在于, 包括:
无线网络控制器 RNC接收用户设备 UE上报的测量报告; 获取基站对所述 UE的上行信道进行测量得到的测量数据; 基于所述 U E上报的测量报告和所述 U E的上行信道的测量数据 执行切换判决;
在判决结果为需要切换时, 通过与所述基站和所述 UE 交互完 成小区切换。
26、 根据权利要求 25所述的方法, 其特征在于, 所述测量报告 包括小区切换事件;
所述基于所示 U E上报的测量报告和所述 U E的上行信道的测量 数据执行切换判决包括:
所述 RNC判断所述小区切换事件的执行条件是否被满足, 以及 根据所述测量数据判断所述 UE在目的小区的上行信道是否处于可信 范围;
在确定所述小区切换事件的执行条件被满足且所述 UE 在所述 目的小区的上行信道处于可信范围时, 判定需要切换。
27、 根据权利要求 26所述的方法, 其特征在于, 所述根据所述 测量数据判断所述 UE在所述目的小区的上行信道是否处于可信范围 具体包括:
根据所述测量数据获得所述 UE 在目的小区和原小区的上行信 道的信号干扰比 SIR,判断所述 UE在所述目的小区的上行信道的 SIR 与所述 UE 在所述原小区的上行信道的 SIR 的比值是否达到预设门 限, 若达到所述预设门限, 则所述 UE在所述目的小区的上行信道处 于可信范围。
28、 根据权利要求 26至 27任一项所述的方法, 其特征在于, 所述小区切换事件为删除链路事件;
所述小区切换事件的执行条件为所述 UE 的活动集中的小区数 目大于 1。
29、 根据权利要求 25 至 28任一项所述的方法, 其特征在于, 所述 UE的上行信道的测量数据包括所述 UE的活动集和监视集中每 个小区的上行信道的 SIR或信号干扰比偏差 SIRerr。
30、 根据权利要求 25 至 29任一项所述的方法, 其特征在于, 所述 RNC 获取基站对所述 UE 的上行信道进行测量得到的测量数据 具体包括:
所述 RNC向所述基站发送指示消息; 其中所述指示消息用于指 示所述基站获取所述 UE的上行信道的测量数据;
所述 RNC接收所述基站根据所述指示消息对所述 UE的上行信 道进行测量后上报的所述测量数据。
3 1、 根据权利要求 25 至 30任一项所述的方法, 其特征在于, 所述 UE上报的测量报告是所述 UE在测量到活动集和监视集中的小 区的下行信道的接收信号码功率 RSCP满足小区切换事件的触发条件 后上报的。
32、 一种小区切换方法, 其特征在于, 包括:
基站对用户设备 UE的上行信道进行测量,得到所述 UE的上行 信道的测量数据;
将所述 U E的上行信道的测量数据上报至无线网络控制器 R N C , 以便所述 RNC根据所述测量数据执行切换判决;
所述基站接收所述 RNC在判定所述 UE需要切换后发送的切换 指令;
根据所述切换指令完成链路层的切换操作。
33、 根据权利要求 32所述的方法, 其特征在于, 所述基站对用 户设备 UE的上行信道进行测量之前, 所述方法还包括:
所述基站接收所述 RNC发送的指示消息; 其中所述指示消息用 于指示所述基站获取所述 UE的上行信道的测量数据。
34、 根据权利要求 32或 33所述的方法, 其特征在于, 所述 UE 的上行信道的测量数据包括所述 UE的活动集和监视集中每个小区的 上行信道的信号干扰比 SIR或信号干扰比偏差 SIRerr。
35、 一种小区切换方法, 其特征在于, 包括:
用户设备 UE对下行信道的信号质量进行测量;
当测量的结果满足小区切换事件的触发条件时, 所述 UE 获取 原小区和目的小区的上行功控字;
通过对原小区和目 的小区的上行功控字进行比对判断所述 UE 在所述目的小区的上行信道是否处于可信的范围;
若所述 UE 在所述目的小区的上行信道处于可信的范围, 则所 述 UE 向无线网络控制器 RNC 上报包含所述小区切换事件的测量报 告, 以便所述 RNC根据所述小区切换事件执行切换判决。
36、 根据权利要求 35所述的方法, 其特征在于, 所述通过对原 小区和目的小区的上行功控字进行比对判断所述 UE在目的小区的上 行信道是否处于可信的范围具体包括:
比较所述原小区和所述目的小区的上行功控字的大小, 若所述 原小区的上行功控字大于所述目的小区的上行功控字, 则所述 UE判 定所述 UE在所述目的小区的上行信道处于可信的范围。
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