WO2019242608A1 - 一种切换评估、报告方法、装置及基站 - Google Patents

一种切换评估、报告方法、装置及基站 Download PDF

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Publication number
WO2019242608A1
WO2019242608A1 PCT/CN2019/091725 CN2019091725W WO2019242608A1 WO 2019242608 A1 WO2019242608 A1 WO 2019242608A1 CN 2019091725 W CN2019091725 W CN 2019091725W WO 2019242608 A1 WO2019242608 A1 WO 2019242608A1
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WIPO (PCT)
Prior art keywords
base station
terminal
handover
cell
measurement
Prior art date
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Ceased
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PCT/CN2019/091725
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English (en)
French (fr)
Inventor
高媛
施小娟
方建民
高音
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ZTE Corp
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ZTE Corp
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Publication date
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Priority to US17/254,790 priority Critical patent/US11490294B2/en
Priority to EP19821602.0A priority patent/EP3813408B1/en
Publication of WO2019242608A1 publication Critical patent/WO2019242608A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04W36/0064Transmission or use of information for re-establishing the radio link of control information between different access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085Hand-off measurements
    • H04W36/0094Definition of hand-off measurement parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • 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
    • H04W36/0058Transmission of hand-off measurement information, e.g. measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the present application relates to the field of communications, and in particular, to a handover evaluation and reporting method, device, and base station.
  • the cross-system handover of the terminal refers to the handover between the NR system and the EUTRA (Evolved Universal Terrestrial Radio Access) system.
  • EUTRA Evolved Universal Terrestrial Radio Access
  • a terminal switches from the NR system to the EUTRA system, it is usually because the terminal detects that the current signal parameters of the serving cell of the NR system do not meet the parameter threshold set by the gNB (NG-RAN NodeB, 5G base station). Services are provided by an eNB (Evolved NodeB).
  • NG-RAN NodeB 5G base station
  • Services are provided by an eNB (Evolved NodeB).
  • the gNB's setting of the signal parameter threshold of the serving cell is not reasonable, for example, setting the parameter threshold too high may cause the terminal to cross-system switch when the coverage of the gNB can meet the terminal service requirements.
  • This kind of cross-system handover is an unreasonable and unnecessary handover, but currently, gNB cannot determine whether the handover of the terminal is
  • An embodiment of the present invention provides a handover evaluation, reporting method, device, and base station.
  • the main technical problem to be solved is to provide a system handover detection and evaluation solution to solve the problem that the base station cannot determine whether the current system handover of the terminal is necessary in the prior art. problem.
  • an embodiment of the present invention provides a handover evaluation method, including: sending measurement configuration information and necessity evaluation information to a target base station, and the measurement configuration information is used by the target base station to instruct the terminal to measure a cell on the source base station side. And report a cell measurement result; obtain a system handover report generated by the target base station according to the cell measurement result and the necessity assessment information, and the system handover report represents a cross-system handover from the base station to the target base station to an unnecessary handover.
  • the method further includes: adjusting a signal parameter handover threshold that can cause the terminal to perform cross-system handover according to the system handover report.
  • sending the measurement configuration information and the necessity evaluation information to the target base station includes: sending the measurement configuration information and the necessity evaluation information to the source core network device, so that the source core network device sends the measurement configuration information through the target core network device.
  • the necessity assessment information are sent to the target base station; and / or, obtaining the system handover report generated by the target base station based on the cell measurement results and the necessity assessment information includes: receiving the system sent by the target base station through the target core network device and the source core network device in turn Switch reports.
  • sending the measurement configuration information and the necessity evaluation information to the source core network device includes: when determining that the terminal needs to perform a cross-system handover from the base station to the target base station, carrying the measurement configuration information and the necessity evaluation information on the source The transparent container message from the base station to the target base station is sent to the source core network device.
  • the measurement configuration information includes a beam measurement indication and a cell measurement strategy, and the beam measurement indication is used by the terminal to measure the beam of the source base station-side cell; the cell measurement strategy is used by the terminal to determine based on the measurement result of the source base station-side cell beam Cell measurement results.
  • the beam measurement indication includes at least one of the following types of information: a measurement period, a measurement target bandwidth, a measurement frequency point list, and measurement configuration information of the source base station side synchronization signal / physical broadcast channel block SSB.
  • the beam measurement indication further includes at least one of the following two types: an indication of whether to report beam information and its corresponding beam measurement result; and a maximum number of beam information and its corresponding beam measurement result.
  • the cell measurement strategy is used to instruct the terminal to select a preset number of beam measurement results according to the first threshold of the signal parameter, and derive the cell measurement result according to the selected beam measurement.
  • An embodiment of the present invention further provides a handover report method, including: receiving measurement configuration information and necessity assessment information sent by a source base station; sending the measurement configuration information to a terminal, and the measurement configuration information used to instruct the terminal to perform a cell on the source base station side Measure and report the cell measurement results; determine whether the cross-system handover from the source base station to the base station is necessary based on the necessity assessment information and the cell measurement results reported by the terminal; generate a system handover report and send it when it is determined that the cross-system handover is unnecessary To the source base station.
  • the system handover report includes a handover problem, and the handover problem is used to indicate that the terminal cross-system handover is an unnecessary handover; the system handover report also includes at least one of the following types of information: the type of handover of the current cross-system handover by the terminal ; The source cell-side serving cell identifier; the target base station-side serving cell identifier; the source base station-side meeting the cell measurement result and the corresponding cell identifier that meet the requirements of the indicators in the necessity assessment information.
  • the system handover report further includes: cell beam information reported by the terminal and a beam measurement result corresponding to the beam.
  • receiving the measurement configuration information and the necessity evaluation information sent by the source base station includes: receiving, from the target core network device, the measurement configuration information and the necessity evaluation information sent by the source base station through the source core network device; and / or, Sending the system handover report to the source base station includes: sequentially sending the system handover report to the source base station through the target core network device and the source core network device.
  • determining whether the cross-system handover of the terminal from the source base station to the base station is necessary according to the necessity assessment information and the cell measurement result reported by the terminal includes: determining the measured values of each signal parameter in at least one cell measurement result reported by the terminal. When the corresponding index requirements in the necessity assessment information are met, it is determined that the inter-system handover of the terminal is an unnecessary handover; it is determined that at least one signal parameter measurement value exists in the measurement results of each cell reported by the terminal and does not satisfy the corresponding in the necessity assessment information When required by the indicators, determine that the cross-system switching of the terminal is necessary.
  • the measurement configuration information includes a beam measurement indication and a cell measurement strategy, and the beam measurement indication is used by the terminal to measure the beam of the source base station-side cell; the cell measurement strategy is used by the terminal to determine based on the measurement result of the source base station-side cell beam Cell measurement results.
  • An embodiment of the present invention further provides a handover detection method, including: receiving measurement configuration information from a source base station sent by a target base station; measuring a cell on a source base station side according to the measurement configuration information; reporting a cell measurement result to the target base station, and cell measurement The result is used by the target base station to generate the system handover report based on the necessity assessment information from the source base station and sent to the source base station.
  • the system handover report characterizes the cross-system handover from the source base station to the target base station as an unnecessary handover.
  • the measurement configuration information includes a beam measurement indication and a cell measurement strategy; measuring the cell on the source base station side according to the measurement configuration information includes: measuring the cell beam on the source base station side according to the beam measurement indication; and according to the cell measurement strategy and The measurement result of the cell beam determines the cell measurement result.
  • the beam measurement indication includes at least one of the following types of information: a measurement period, a measurement target bandwidth, a measurement frequency point list, and measurement configuration information of the source base station side synchronization signal / physical broadcast channel block SSB.
  • the beam measurement indication further includes at least one of the following two types: an indication of whether to report beam information and its corresponding beam measurement result; and a maximum number of beam information and its corresponding beam measurement result.
  • determining the cell measurement result according to the cell measurement strategy and the measurement result of the cell beam includes: selecting a preset number of beam measurement results according to a first signal parameter threshold carried in the cell measurement strategy; and deriving according to the selected beam measurement result. Cell measurement results.
  • An embodiment of the present invention further provides a handover evaluation device, including: a configuration sending module, configured to send measurement configuration information and necessity evaluation information to a target base station, and the measurement configuration information is used by the target base station to instruct the terminal to perform a cell on the source base station side. Measure and report the cell measurement results; a report acquisition module is used to obtain a system handover report generated by the target base station based on the cell measurement results and the necessity assessment information.
  • the system handover report represents a cross-system handover from the base station to the target base station to an unnecessary handover. .
  • An embodiment of the present invention further provides a handover report device, including: a configuration receiving module for receiving measurement configuration information and necessity assessment information sent by a source base station; a measurement instruction module for transmitting measurement configuration information to a terminal, and measuring configuration The information is used to instruct the terminal to measure the cell on the source base station side and report the cell measurement result; the necessary evaluation module is used to determine whether the cross-system handover from the source base station to the base station is based on the necessity evaluation information and the cell measurement result reported by the terminal Necessary; A handover report module is used to generate a system handover report and send it to the source base station when it is determined that the cross-system handover is unnecessary.
  • An embodiment of the present invention further provides a handover detection device, including: a configuration acquisition module configured to receive measurement configuration information sent by a target base station from a source base station; and a cell measurement module configured to perform a process on a cell on a source base station side according to the measurement configuration information. Measurement; measurement report module, used to report the cell measurement results to the target base station. The cell measurement results are used by the target base station to generate the system handover report and send it to the source base station in combination with the necessity assessment information from the source base station. The cross-system handover from the base station to the target base station is unnecessary.
  • An embodiment of the present invention further provides a base station, which is characterized in that it includes a first processor, a first memory, and a first communication bus; the first communication bus is used to implement connection and communication between the first processor and the first memory; The first processor is configured to execute a handover evaluation program stored in the first memory to implement the steps of the handover evaluation method according to any one of the above; or the first processor is configured to execute a handover report program stored in the first memory to implement Steps to switch report methods from the previous item.
  • the base station is an NG-RAN base station; if a handover report program is stored in the first memory, the base station is an evolved base station.
  • An embodiment of the present invention further provides a terminal, which is characterized in that it includes a second processor, a second memory, and a second communication bus; the second communication bus is used to implement connection and communication between the second processor and the second memory; The second processor is configured to execute a handover detection program stored in the second memory to implement the steps of the handover detection method according to any one of the preceding items.
  • An embodiment of the present invention further provides a storage medium. At least one of a handover evaluation program, a handover report program, and a handover detection program is stored in the storage medium.
  • the handover evaluation program may be executed by one or more processors to implement the above tasks. Steps of a handover evaluation method; a handover report program may be executed by one or more processors to implement the steps of the handover report method of any one of the preceding items; a handover detection program may be executed by one or more processors to implement The steps of the handover detection method according to any of the above.
  • the source base station sends measurement configuration information and necessity assessment information to the target base station, so that the target base station instructs the terminal to the source base station side according to the measurement configuration information according to the measurement configuration information.
  • the target base station instructs the terminal to the source base station side according to the measurement configuration information according to the measurement configuration information.
  • To measure the cell and send the cell measurement result for the cell to the target base station.
  • the target base station After receiving the cell measurement result sent by the terminal, the target base station can determine whether the current cross-system handover from the source base station to the target system is necessary based on the cell measurement result and the necessity assessment information sent by the source base station, and determine the When the system handover is unnecessary, a system handover report indicating that the terminal is handed over to an unnecessary handover is generated and sent to the source base station, so that the source base station learns that the terminal is currently performing an unnecessary cross-system handover based on the system handover report, and thus learns The signal parameter switching threshold on the local side may not be reasonable.
  • the system handover report sent by the target base station to the source base station can be used as a basis for the source base station to reflect and evaluate whether the signal parameter switching threshold set by the source base station side that can cause the terminal to perform cross-system handover is reasonable.
  • the solution of the embodiment of the present invention provides a way for the source base station to feed back the necessity of the inter-system handover of the terminal, so that the source base station can This feedback determines the rationality of the signal parameter switching threshold setting on the local side, which is beneficial to improving the communication effect and communication experience on the terminal side.
  • FIG. 1 is a flowchart of a handover evaluation scheme provided in Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of a handover evaluation system provided in Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of interaction between devices in a handover evaluation system provided in Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart of deriving a cell measurement result by a terminal according to a beam measurement result provided in Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of a model for a terminal to measure a cell on a source base station side provided in Embodiment 2 of the present invention
  • FIG. 6 is a schematic structural diagram of a handover evaluation apparatus provided in Embodiment 3 of the present invention.
  • FIG. 7 is a schematic structural diagram of a handover report device provided in Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a handover detection device provided in Embodiment 3 of the present invention.
  • FIG. 9 is a schematic diagram of a hardware structure of a base station provided in Embodiment 4 of the present invention.
  • FIG. 10 is a schematic diagram of a hardware structure of a terminal provided in Embodiment 4 of the present invention.
  • the handover evaluation scheme may include The handover evaluation system of the source base station, target base station, and terminal is implemented. The following describes the solution with reference to the interaction diagrams of the source base station, target base station, and terminal in the handover evaluation scheme shown in FIG. 1.
  • the source base station sends measurement configuration information and necessity assessment information to the target base station.
  • the source base station refers to the base station that serves the terminal before the terminal performs cross-system handover, and the target base station is naturally the base station that serves the terminal after the terminal completes the cross-system handover.
  • the so-called cross-system handover refers to the handover of a terminal from a base station of one communication system to a base station of another communication system.
  • the cross-system handover may be a handover from an older base station using communication technology (hereinafter referred to as "old base station") to a base station updated by communication technology (hereinafter referred to as "new base station”), such as switching from an eNB base station in a 4G communication system to A gNB base station in a 5G communication system; it may also be a handover from a new base station to an old base station.
  • the terminal switches from a gNB base station to an eNB base station or a base station in a 2G or 3G communication system.
  • the scenario where the source base station needs to understand the necessity of the terminal's cross-system handover refers to the handover of the terminal from the new base station to the old base station.
  • the source base station may not need to care about its necessity, because this is beneficial to the user experience on the terminal side.
  • the measurement configuration information is used to instruct the terminal to measure a cell on the source base station side and report a cell measurement result obtained by the cell measurement. Therefore, in the measurement configuration information, at least information for indicating a measurement target to the terminal and measurement strategy information indicating how the terminal performs measurement are included. After the target base station obtains the measurement configuration information, it may instruct the terminal to measure the cell on the source base station side according to the indication in the measurement configuration information.
  • the necessity evaluation information is used by the target base station to judge the cell measurement result reported by the terminal, so as to determine whether a side-to-system handover from the source base station to the target base station is necessary.
  • the necessity evaluation information may include indicators of at least one signal parameter for judging whether the terminal is required to switch between systems.
  • these indicators may be the second threshold of the signal parameter.
  • the so-called signal parameters here may include, but are not limited to, RSRP (Reference Received Power), RSRQ (Reference Received Quality), and SINR (Signal to Interference plus Noise, Ratio). Than) at least one of.
  • the signal parameters include both RSRP and SINR
  • the necessity assessment information may include both the second threshold of RSRP and the second threshold of SINR.
  • the communication mode between the source base station and the target base station is not specifically limited, and any manner and way that the source base station can send measurement configuration information and necessity assessment information to the target base station are feasible, such as the two Can communicate directly, or can communicate through other devices.
  • the handover evaluation system may include not only the aforementioned source base station, target base station, and terminal, but also other network devices.
  • the handover evaluation system further includes a source core network.
  • Equipment and target core network equipment where the source core network equipment is the core network equipment in the source base station side communication system, and the target core network equipment is the core network equipment in the target base station side communication system.
  • the source base station is a gNB and the target base station is an eNB
  • the source core network can be a 5G core network
  • the target core network can be a 4G core network.
  • FIG. 2 shows a schematic diagram of a handover evaluation system 2.
  • the handover evaluation system 2 includes a source base station 21, a target base station 24, a terminal 25, and a source core network device.
  • Target core network equipment where the source base station 21 is gNB and the target base station is an eNB base station.
  • the source core network equipment is AMF (Access Mobility Function) network element 22, and the target core network equipment is MME (Mobility). Management entity) network element 23.
  • AMF Access Mobility Function
  • MME Mobility Management entity
  • the source base station 21 and the AMF network element 22 can communicate through an NG interface, the target base station 24 and the MME network element 23 can communicate through an S1 interface, and the AMF network element 22 and the MME network element 23 can interact through an N26 interface. Therefore, in this example, the source base station 21 may first send the measurement configuration information and the necessity assessment information to the AMF network element 22 through the NG interface, and then the AMF network element 22 sends the two information to the MME network element through the N26 interface. 23. Then, the MME network element 23 may send the two pieces of information to the target base station 24 through the S1 interface.
  • S104 The target base station sends the received measurement configuration information to the terminal.
  • the target base station may instruct the terminal to measure the cell on the source base station side according to the measurement configuration information. For example, in this embodiment, the target base station may send the received measurement configuration information to the terminal.
  • the source base station carries measurement configuration information and necessity assessment information in a transparent container message from the source base station to the target base station when the terminal needs to perform a cross-system handover from the base station to the target base station.
  • the target base station after the target base station obtains the measurement configuration information and the necessity assessment information through the transparent container message from the source base station to the target base station, it also needs to provide feedback to the source base station side, so that the source base station indicates that an inter-system handover is imminent
  • the terminal that has not completed the handover is handed over to the target base station.
  • S106 The terminal measures a cell on the source base station side according to the measurement configuration information.
  • the terminal After the terminal obtains the measurement configuration information from the target base station, it can measure the cell on the source base station side based on the measurement configuration information, and feed back the measurement result to the target base station based on the cell, that is, send the cell measurement result to the target base station.
  • the source base station since the source base station is a gNB, the measurement of the cell on the source base station side by the terminal is actually based on the measurement of the beam in the cell.
  • the source base station configures a beam measurement instruction and a cell measurement strategy.
  • the beam measurement instruction allows the terminal to measure each beam in the source base station-side cell in units of the beam. It can be understood that, under the source base station, there is at least one cell, and the source base station will configure at least one beam for each cell.
  • the terminal can obtain the measurement result of each beam in the cell.
  • the terminal In order to obtain the cell measurement result, the terminal can determine the measurement result of the cell based on the measurement result of each beam according to the cell measurement strategy in the measurement configuration information. .
  • the target base station is an eNB.
  • the measurement of the NR system by the terminal in the LTE (Long Term Evolution) system only supports the measurement of SSB (SS / PBCH block, synchronization signal / physical broadcast channel block), so in this embodiment
  • the physical layer obtains measurement results of multiple beams in a cell by measuring the SSB.
  • the beam measurement indication may include measurement configuration information of the source base station-side SSB.
  • the beam measurement indication also includes the measurement period, measurement target bandwidth, and measurement frequency list configured by the source base station.
  • the measurement period is used to indicate in which time period the terminal measures the cell on the source base station side.
  • the measurement target bandwidth and measurement frequency list are mainly used for the terminal to determine the measurement target.
  • the cell measurement strategy instructs the terminal to derive a measurement result for the cell based on the measurement results of each beam in the cell.
  • the cell measurement strategy only instructs the terminal to select a part from the beam measurement results of the cell as a basis for deriving the cell measurement results.
  • the cell measurement strategy instructs the terminal how to make a selection and how many beam measurement results to choose.
  • the terminal calculates according to the selected beam measurement result to obtain the cell measurement result. For example, the terminal measures the selected beams. The results are averaged and the cell measurement results are calculated.
  • S108 The terminal reports the cell measurement result to the target base station.
  • the terminal After the terminal obtains the cell measurement results for each cell under the source base station, the terminal sends the cell measurement results to the target base station, so that the target base station judges whether the handover of the terminal from the source base station to the target base station is necessary.
  • the target base station determines whether a cross-system handover from the source base station to the base station is necessary according to the necessity assessment information and the cell measurement result reported by the terminal.
  • the necessity evaluation information can be used by the target base station to evaluate the cell measurement result fed back by the terminal.
  • the necessity assessment information includes the second threshold of the signal parameter, and the target base station can determine whether the measured value of the signal parameter of the corresponding side in the cell measurement result exceeds its second threshold. Assuming that the second threshold of the signal parameter A and the second threshold of the signal parameter B are included in the necessity evaluation information, the target base station needs to evaluate whether the measurement value of the signal parameter A in the cell measurement result exceeds the second threshold of A and the cell Whether the measurement value of the signal parameter B in the measurement result exceeds the second threshold of B in the necessity assessment information.
  • the second threshold of the signal parameter is set by the source base station.
  • the source base station sets the second threshold of the signal parameter, it needs to consider the minimum value of the signal parameter that can provide services to the terminal.
  • the signal parameter is RSRP
  • the source base station needs to consider the minimum value of the terminal RSRP when the base station provides services to the terminal.
  • the second threshold cannot be lower than this value, otherwise
  • the RSRP measurement value of the cell is higher than its second threshold in the cell measurement result reported by the terminal, the target base station still cannot determine whether the RSRP of the current cell meets the requirements for providing services. Therefore, in this embodiment, the second threshold of a signal parameter is generally slightly higher than the lowest value of the signal parameter when the terminal is served.
  • the target base station determines that among the M cell measurement results reported by the terminal, at least N of the cell measurement results indicate that the service requirements of the terminal can be satisfied, the target base station determines that the terminal is from the source base station to The inter-system handover at the base station side is not necessary and belongs to an unnecessary handover.
  • the target base station may determine that the cross-system handover from the source base station to the base station side is a necessary handover.
  • N is less than or equal to M. In an example of this embodiment, N is equal to 1. Therefore, as long as the target base station determines that among the measurement results of each cell reported by the terminal, the measurement values of the signal parameters in at least one of the cell measurement results meet the corresponding ones in the necessity evaluation information.
  • the target base station determines that the cross-system handover of the terminal is an unnecessary handover, because if the terminal continues to reside on the source base station side, at least there may be a cell corresponding to the measurement result of the cell that can meet the service demand of the terminal.
  • the target base station determines that the measurement results of each cell reported by the terminal have more or less measurement values of some signal parameters that do not meet the corresponding indicator requirements in the necessity assessment information, the target base station determines that the cross-system handover of the terminal is a necessary handover Because during the measurement period of the terminal, there is no cell on the source base station side that can meet the service requirements of the terminal, so if the terminal continues to reside under the source base station, the source base station cannot provide the terminal with a demand that satisfies the user.
  • the target base station generates a system handover report when determining that the cross-system handover is unnecessary, and sends the system handover report to the source base station.
  • the target base station After the target base station determines the necessity of the inter-system handover of the terminal according to the necessity assessment information and the cell measurement result reported by the terminal, if it is determined that the inter-system handover of the terminal is an unnecessary handover, it generates a system handover report and sends it to the source base station to let the source According to the system handover report, the base station learns that the terminal is currently performing an unnecessary system handover, and can then evaluate whether the setting of the signal parameter handover threshold is appropriate based on the received system handover report. It can be understood that, because the system handover report is generated and sent to the source base station by the target base station when it is determined that the terminal has performed an unnecessary handover, the system handover report should include information capable of characterizing the terminal handover as an unnecessary handover.
  • the target base station may generate a system handover report and send it to the source base station regardless of whether a terminal handover is necessary.
  • the handover reports generated for the two scenarios in which an unnecessary handover occurs and a necessary handover are different.
  • At least the system handover generated by the target base station when the terminal has undergone the necessary cross-system handover cannot represent the terminal's cross-system. Switching is unnecessary.
  • the need for a cross-system handover of a terminal may be represented by a "handover problem": if a cross-system handover of a terminal from a source base station to a target base station is an unnecessary handover ,
  • the information carried in the handover problem may be information capable of characterizing the handover as "unnecessary inter-system handover"; otherwise, the information carried in the handover problem may be other information.
  • the information in the handover problem can be "0", “1", and “2", where "0" indicates that the handover problem is an unnecessary system handover, and "1" indicates that the handover of the terminal is due to the first problem, " 2 "characterizes the terminal handover because of the second problem.
  • the generated system handover report should carry a value of" 0 "in the handover problem.
  • the system handover report may include at least one of the following types in addition to the information characterizing the necessity of the terminal's cross-system handover, such as a handover problem:
  • the serving cell on the source base station side is a cell where the terminal leaves the source base station and switches to the source base station side before switching to the target base station side.
  • the target serving cell identity of the target base station side refers to the cell where the target base station side provides services to the terminal after the terminal implements cross-system handover.
  • the source base station side meets the cell measurement results and the corresponding cell identifiers required by the indicators in the necessity assessment information. If the target base station determines that the measurement values of the signal parameters in the cell measurement results of the K cells on the source base station side are greater than the second threshold of the corresponding signal parameters in the necessity assessment information, the target base station may identify the cell IDs of the K cells And the cell measurement results of the K cells are carried in the system handover report and sent to the source base station together.
  • the system handover report also includes the terminal Reported beam information and corresponding beam measurement results. If the measurement configuration information further indicates the maximum number of reported beam information and its corresponding beam measurement results, the beam information carried in the system handover report and the number of beam measurement results meet the maximum number requirements.
  • the target base station and the source base station can communicate through the target core network device and the source core network device. Therefore, in an example of this embodiment, the target base station can integrate the system The handover report is first sent to the target core network device, and then the target core network device sends it to the source base station through the source core network device.
  • the target base station 24 may first send the system handover report to the MME network element 23 through the S1 interface, and then the MME network element 23 sends the AMF network element 22 and the AMF network element 22 through the N26 interface. After receiving the system handover report from the target base station 24, it will send the system handover report to the source base station 21 through the NG interface. It can be understood that the communication mode between the target base station and the source base station is not limited to the one described in this example.
  • the source base station may determine the necessity of the terminal handing over to the target base station. Furthermore, when the source base station determines that the system handover report indicates that the handover of the terminal is an unnecessary handover, it can be determined that the signal parameter handover threshold of the local side may not be set very reasonable. Of course, if the cross-system handover of only one terminal is unnecessary, it may be caused by accident, but if the source base station receives multiple system handover reports, and these multiple system handover reports all represent the corresponding terminal's The handover is a non-essential handover. In this case, the source base station can determine that the handover threshold of the signal parameter is really unreasonable. Therefore, the handover threshold of the signal parameter can be adjusted according to the system handover report.
  • the handover evaluation scheme provided in this embodiment includes a handover evaluation method implemented by a source base station side, a handover report method implemented by a target base station side, and a handover detection method implemented by a terminal side, through mutual interaction between the source base station, the target base station, and the terminal.
  • the source base station can know whether the current cross-system handover of the terminal is necessary, and then reflect on whether the signal parameter switching threshold that can cause the terminal to perform cross-system handover is on the side The setting is reasonable.
  • the handover evaluation scheme in this embodiment is actually a This feedback method allows the source base station to consider the terminal's feedback on the current signal parameter switching threshold when setting / adjusting the signal parameter switching threshold, thereby setting a more reasonable switching threshold, reducing unnecessary switching on the terminal side, and improving the terminal. User experience.
  • This embodiment will continue to introduce the handover evaluation scheme in the foregoing embodiment in combination with the handover evaluation system shown in FIG. 2 on the basis of the first embodiment. It can be understood that the solution provided by this embodiment can not only be applied to The scenario in which a terminal switches from a 5G base station to a 4G base station can also be applied to base station switching scenarios in other different systems, such as a 5G base station to a 3G base station, or a 4G base station to a 3G / 2G base station, or even a future one.
  • the base station in the communication system is switched to the base station in the existing communication system. Please refer to the handover evaluation flowchart shown in FIG. 3.
  • the gNB configures measurement configuration information and necessity assessment information in a transparent container message from the source base station to the target base station.
  • the gNB may configure a new IE IRAT Measurement Configuration (Trans-System Measurement Configuration Information) in Source eNB, Target eNB, and Transparent Container (transparent container message from source base station to target base station), and in IRAT Measurement Configuration
  • the measurement configuration information may include measurement configuration information instructing the terminal to perform measurement on the gNB-side cell, and necessary evaluation information for the target base station eNB to judge the necessity of the terminal switching from the gNB to the eNB.
  • IRAT Measurement Configuration may include the following information:
  • Time period t1-t2 for measurement on the source base station side 1) Time period t1-t2 for measurement on the source base station side; 2) List of frequency points that need to be measured on the source base station side; 3) Measurement bandwidth of the carrier frequency on the source base station side; 4) Measurement configuration information of the SSB on the source base station side; 5) the first threshold of the signal parameter; 6) the maximum number of selected beams Q when the terminal determines the cell measurement result; 7) the second threshold of the signal parameter.
  • 1) -6) is information used to indicate that the terminal has measured the cell on the gNB side and has obtained the cell measurement result, so it belongs to measurement configuration information.
  • 7) is used for the target base station eNB to determine whether the cross-system handover of the terminal is necessary, so it belongs to the necessity assessment information.
  • the measurement configuration information in IRAT Measurement Configuration that is, 1) -6
  • 1) -4) is information used to instruct the terminal to measure the beam of the gNB side cell of the source base station to obtain the beam measurement result.
  • This information is called "beam measurement indication”.
  • 5) and 6) may instruct the terminal to select a part from the measurement results of each beam of the cell and participate in calculating the measurement results of the cell. Therefore, in this embodiment, 5) and 6) are used to instruct the terminal to perform measurement based on the cell beam Information that determines cell measurement results, so it is called "cell measurement strategy".
  • IRAT Measurement Configuration in addition to the above 1) -7), it may also include the following:
  • the content in 8) is used to indicate to the terminal whether a beam report is required, that is, whether the terminal needs to report beam information and a beam measurement result corresponding to the beam.
  • the content in 9) instructs the terminal how many beams to report when it is determined that the terminal needs to report the beam information and the beam measurement result corresponding to the beam.
  • the gNB carries the transparent container message from the source base station to the target base station in the handover request message and sends it to the AMF network element.
  • the Source eNB, Target, eNB, and Transparent Container message can be sent to the AMF network element in the handover request message.
  • Handover required message namely Handover Required. Since the gNB can communicate with the AMF network element through the NG interface, the gNB can send Handover Required to the AMF network element through the NG interface.
  • the AMF network element carries the transparent container message from the source base station to the target base station in a migration request and sends it to the MME network element.
  • the AMF network element can extract the Source eNB to Target Target eNB Transparent Container message in the Handover Required message, generate a migration request based on the extracted Source eNB to Target eNB Transparent Container message, and then pass the migration request through The N26 interface is sent to the MME network element.
  • Migration request that is, Relocation Request.
  • the MME network element carries the transparent container message from the source base station to the target base station in a handover request message and sends it to the eNB.
  • the MME network element may generate a Handover Request (handover request) message according to the Source eNB to the Target eNB Transparent message in the Relocation Request message, and then send it to the eNB through the S1 interface.
  • Handover Request handover request
  • S310 The eNB sends a handover request response to the MME network element.
  • the eNB After receiving the Handover Request message from the eNB, the eNB will send a Handover Request Acknowledge (Handover Request Response) message to the MME network element according to the Handover Request message. Of course, the eNB still sends a handover request response message to the MME network element through the S1 interface.
  • Handover Request Acknowledge Handover Request Response
  • S312 The MME network element sends a migration request response to the AMF network element.
  • the MME network element may send a Relocation Response message to the AMF network element through the N26 interface according to the handover response message, as a response to the AMF network element sending a Relocation Request Request message to itself. .
  • S314 The AMF network element sends a handover instruction to the terminal through the gNB.
  • the AMF network element may send a Handover Command (handover command) message to the terminal through the gNB according to the Relocation Response message, instructing the terminal to switch from the source base station gNB to the target base station eNB according to the Handover Command.
  • Handover command handover command
  • S316 The terminal switches from the gNB to the eNB across the system according to the handover instruction.
  • the terminal After receiving the Handover Command message sent by the gNB, the terminal switches to the eNB according to the Handover Command message. It can be understood that, in some examples in this embodiment, after the terminal completes the cross-system handover from the source base station to the target base station, it may also send a Handover Complete message to the target base station eNB, indicating that its own cross-system handover is complete. .
  • S318 The terminal measures the beam of the cell on the gNB side according to the measurement configuration information.
  • the beam of the gNB-side cell can be measured according to the measurement configuration information configured by the source base station gNB. Specifically, the terminal measures each beam in the cell according to the beam measurement indication in the measurement configuration information. Take measurements. For example, in this embodiment, the terminal measures each beam in the cell on the gNB side according to 1) -4) in the IRAT Measurement Configuration to obtain a beam measurement result. During the time period t1-t2 indicated by the IRAT Measurement Configuration, the terminal performs measurement according to the frequency point list in the IRAT Measurement Configuration, the measurement bandwidth of the carrier frequency, and the measurement configuration information of the SSB.
  • S320 The terminal derives a cell measurement result according to the measurement configuration information and the beam measurement result.
  • a cell of gNB there may be multiple beams. After measuring the multiple beams, the terminal can obtain the measurement results of each beam. It is assumed that b7 is included in a cell. , The terminal may derive a cell measurement result based on the beam measurement results of the seven beams and a cell measurement strategy in the measurement configuration information.
  • the terminal when calculating a cell measurement result, the terminal does not necessarily perform calculation based on the beam measurement results of all beams in the cell, but first selects and selects from each beam measurement result according to an instruction in the cell measurement strategy. Participate in the calculation of "quality beams".
  • the following describes the process by which the terminal determines the cell measurement result based on the beam measurement results of each beam in a cell with reference to FIG. 4:
  • the IRAT Measurement Configuration includes the first threshold of the signal parameters and the maximum number of selected beams Q when the terminal determines the cell measurement result. Therefore, the terminal can:
  • S402 The terminal selects a candidate beam measurement result from the beam measurement results of the cell according to the first threshold of the signal parameter.
  • the terminal first selects, as a candidate beam measurement result, a signal parameter measurement value that is greater than or equal to a corresponding first threshold from the beam measurement results of the cell.
  • the signal parameter here may be at least one of RSRP, RSRQ, and SINR.
  • S404 The terminal determines whether there is a candidate beam measurement result.
  • S406 Use the beam measurement result with the highest signal parameter measurement value among the beam measurement results as the target beam measurement result.
  • the terminal cannot select a beam measurement result with a signal parameter measurement value higher than the corresponding first threshold, in this embodiment, the terminal selects a beam measurement result with the best measurement value as the target beam measurement result as the derived cell measurement result.
  • S408 The terminal determines whether the number of candidate beam measurement results exceeds the maximum number Q.
  • the number of beam measurement results participating in the calculation is less than or equal to Q. Therefore, after the terminal selects the candidate beam measurement results according to the first threshold of the signal parameter, it will further determine whether the number of candidate beam measurement results exceeds the maximum number Q. If the determination result of the terminal is YES, the process proceeds to S410; otherwise, the process proceeds to S412.
  • S410 The terminal selects Q from the candidate beam measurement results as the target beam measurement results.
  • the terminal determines that the number of candidate beam measurement results exceeds Q, it means that in this cell of the gNB, there are not only Q beam measurement results whose signal parameter measurement values exceed the corresponding first threshold. In this case, the terminal can select from these From the candidate beam measurement results, Q beam measurement results are selected as the target beam measurement results of the final participating cell measurement results calculation.
  • the terminal may randomly select from the candidate beam measurement results, or may select a measurement result with a better measurement result from the candidate beam measurement results as the target beam measurement result in the order of the signal parameter measurement values from high to low.
  • the terminal selects Q from them as the target beam measurement results. This is only an example of this embodiment.
  • the number of target beam measurement results selected by the terminal may be less than Q.
  • S412 The terminal directly uses the candidate beam measurement result as the target beam measurement result.
  • the terminal determines that the current candidate beam measurement results of the cell do not exceed Q, the terminal does not need to filter the candidate beam measurement results anymore, and can directly use these beam measurement results as the target beam measurement results, so that these candidate beam measurement results can be obtained. All participate in the calculation of cell measurement results.
  • S414 The terminal derives a cell measurement result of the cell based on the target beam measurement result.
  • the terminal may perform an average calculation according to the measurement values in the measurement results of each target beam to obtain the cell measurement result.
  • FIG. 5 shows a schematic diagram of a model for a terminal to measure a cell under gNB.
  • the terminal performs k beams (gNB beam1, gNB beam2 ... gNB beam) on a cell according to RRC configuration parameters (RRC configure parameters).
  • k Perform layer 1 filtering processing to obtain the beam measurement results of the k beams respectively.
  • the terminal performs beam consolidation / selection (Beam, Consolidation / Selection) processing on the beam measurement results of the k beams, that is, the terminal selects the beam measurement results based on the first threshold of the signal parameter and the maximum number of target beam measurement results Q.
  • Target beam measurement results Beam, Consolidation / Selection
  • the terminal may calculate a cell measurement result according to the selected target beam measurement result. Then after B, the terminal performs layer 3 filtering on the cell measurement result, and then sends the cell measurement result after the layer 3 filtering process to the target base station eNB.
  • S322 The terminal sends the cell measurement result to the eNB.
  • the terminal After the terminal calculates the cell measurement result, it sends the cell measurement result to the eNB, so that the eNB determines the necessity of the terminal's cross-system handover according to the cell measurement result.
  • the IRAT Measurement Configuration may include an indication of whether to report a beam and the maximum number of beam reports. Therefore, if the source base station gNB sends to the target base station eNB In IRAT Measurement Configuration, which indicates that beam reporting is required, and the number of reports x is specified, the terminal also needs to select x beam measurement results with better measurement values from the beam measurement results of the cell, and the x beam measurement results And the beam information (SSB index) corresponding to the x beam measurement results is sent to the target base station eNB along with the cell measurement results.
  • SSB index beam information
  • the terminal performs layer 3 filtering on the k beam measurement results in the gNB cell, and then the terminal according to the source base station
  • the relevant beam reporting instruction information sent from the side selects the beam reporting results from the k beam selection results, and sends the beam reporting results to the target base station eNB.
  • S324 The eNB determines the necessity of the terminal's current cross-system handover according to the necessity evaluation information.
  • the eNB After receiving the cell measurement result sent by the terminal, the eNB determines whether the cross-system handover of the terminal is necessary according to the necessity evaluation information in the IRAT Measurement Configuration.
  • the necessity evaluation information in the IRAT Measurement Configuration is the second threshold of the signal parameter.
  • the eNB judges that the cross-system handover of the terminal is unnecessary. Only when each cell on the gNB side is deployed to meet the service needs of the terminal, the eNB determines that the cross-system handover of the terminal is a necessary handover.
  • the possible signal parameters in the necessity assessment information include at least one of RSRP, RSRQ, and SINR, the following briefly describes the process of determining the necessity of handover by the target base station:
  • the target eNB determines that the terminal moves from gNB to the base station. Switching across systems is not necessary.
  • the target eNB determines that the terminal moves from gNB to the base station. Switching across systems is not necessary.
  • the eNB determines that during the measurement period, the measured value of the SINR in the cell measurement results of at least one cell exceeds the second threshold of the SINR, and the target eNB determines that the terminal is from the gNB to This base station side-to-system handover is not necessary.
  • the eNB determines that during the measurement period, the measured value of RSRP in the cell measurement results of at least one cell exceeds the second threshold of RSRP, and the measured value of RSRQ exceeds For the second threshold of the RSRQ, the target-side eNB determines that it is not necessary for the system to perform cross-system handover from the gNB to the base station.
  • the eNB determines that during the measurement period, the measured value of RSRP in the cell measurement results of at least one cell exceeds the second threshold of RSRP, and the measured value of SINR exceeds For the second threshold of SINR, the target-side eNB determines that the inter-system handover from the gNB to the base station is unnecessary.
  • the eNB determines that in the measurement period, the measurement value of RSRQ in at least one cell's cell measurement exceeds the second threshold of RSRQ, and the measurement value of SINR exceeds For the second threshold of SINR, the target-side eNB determines that the inter-system handover from the gNB to the base station is unnecessary.
  • the IRAT Measurement Configuration also includes the second thresholds of RSRP, RSRQ, and SINR
  • at least one cell needs to have a cell measurement result in which the measured value of RSRP exceeds the second threshold of RSRP, and the measured value of RSRQ exceeds the second threshold of RSRQ
  • the threshold exceeds the RSRQ and SINR thresholds at the same time, and the measured value of SINR exceeds the second threshold of SINR, so that the target eNB can determine that the inter-system handover from the gNB to the base station is unnecessary.
  • S326 The eNB sends a system handover report to the gNB through the MME network element and the AMF network element in this order.
  • the eNB determines that the cross-system handover of the terminal is necessary or unnecessary, it sends the system handover report to the gNB through the MME network element and the AMF network element in this order. It is only in the case that the terminal's cross-system handover is a necessary handover, the system handover report cannot characterize the terminal's handover as an unnecessary handover, and when the terminal's cross-system handover is a necessary handover, the eNB sends a system handover report to the gNB Capable of characterizing terminal handover as unnecessary handover.
  • the system handover report may include a handover type, a handover problem, a source base station side serving cell identity (NR-CGI), and a target base station side serving cell identity (ECGI).
  • the handover type refers to "handover from NG-RAN to EUTRAN.”
  • the system handover report also includes a cell list, and the cell list includes a cell measurement result of the source base station gNB side that satisfies each index requirement in the necessity assessment information and a corresponding cell identifier.
  • the cell list may further include beam information reported by the terminal to the eNB and corresponding beam measurement results.
  • the source base station gNB After the source base station gNB receives the system handover report, if it is determined that the terminal handover indicated in the system handover report is an unnecessary handover, it can further determine whether it is necessary to adjust the signal parameter handover threshold that triggers the terminal to perform cross-system handover, thereby avoiding unnecessary handover. happensed again. In this way, the source base station can adjust / set appropriate signal parameter switching thresholds, so that the terminal can reside in the NR system as much as possible, so that the NR system provides terminal-side users with better communication services than the EUTRA system and improves the user experience. .
  • This embodiment first provides a handover evaluation device, which is used to implement the handover evaluation process in the handover evaluation scheme in the foregoing embodiment; please refer to a schematic structural diagram of the handover evaluation device 60 shown in FIG. 6.
  • the handover evaluation device 60 includes a configuration sending module 602 and a report obtaining module 604, where the configuration sending module 602 is used to send measurement configuration information and necessity assessment information to a target base station; and the report obtaining module 604 is used to obtain the target base station according to the cell measurement results and System switching report generated from necessity assessment information.
  • the handover evaluation device 60 may be deployed on a source base station, and the source base station may be a base station in various communication systems, such as a gNB base station in a 5G communication system or an eNB base station in an LTE system, or 3G or Base stations in 2G communication systems can even be base stations in various future communication systems.
  • the functions of the configuration sending module 602 and the report obtaining module 604 can be implemented by the processor of the source base station controlling the communication device of the base station.
  • the source base station refers to the base station that serves the terminal before the terminal performs cross-system handover, and the target base station is naturally the base station that serves the terminal after the terminal completes the cross-system handover.
  • the so-called cross-system handover refers to the handover of a terminal from a base station of one communication system to a base station of another communication system.
  • the cross-system handover may be a handover from an older base station using communication technology (hereinafter referred to as "old base station") to a base station updated by communication technology (hereinafter referred to as "new base station”), such as switching from an eNB base station in a 4G communication system to A gNB base station in a 5G communication system; it may also be a handover from a new base station to an old base station.
  • the terminal switches from a gNB base station to an eNB base station or a base station in a 2G or 3G communication system.
  • the terminal should stay under the new base station as much as possible, and the new base station provides communication services for the terminal, which will help improve the communication experience of the user on the terminal side.
  • the scenario in which the handover evaluation device 60 needs to understand the necessity of the inter-system handover of the terminal refers to the handover of the terminal from the new base station to the old base station.
  • the handover evaluation device 60 may not need to care about its necessity, because this is beneficial to the user experience on the terminal side.
  • the measurement configuration information is used to instruct the terminal to measure a cell on the source base station side and report a cell measurement result obtained by the cell measurement. Therefore, in the measurement configuration information, at least information for indicating a measurement target to the terminal and measurement strategy information indicating how the terminal performs measurement are included. After the target base station obtains the measurement configuration information, it may instruct the terminal to measure the cell on the source base station side according to the indication in the measurement configuration information.
  • the necessity evaluation information is used by the target base station to judge the cell measurement result reported by the terminal, so as to determine whether a side-to-system handover from the source base station to the target base station is necessary.
  • the necessity evaluation information may include indicators of at least one signal parameter for judging whether the terminal is required to switch between systems.
  • these indicators may be the second threshold of the signal parameter.
  • the so-called signal parameters herein may include, but are not limited to, at least one of RSRP, RSRQ, and SINR.
  • the necessity assessment information may include both the second threshold of RSRP and the second threshold of SINR.
  • the communication manner between the configuration sending module 602 and the target base station is not specifically limited in this embodiment, and any manner and way that the configuration sending module 602 can send measurement configuration information and necessity assessment information to the target base station are feasible.
  • the handover evaluation system may include not only the aforementioned source base station, target base station, and terminal, but also other network devices.
  • the handover evaluation system further includes a source core network.
  • Equipment and target core network equipment where the source core network equipment is the core network equipment in the source base station side communication system, and the target core network equipment is the core network equipment in the target base station side communication system.
  • the source base station is a gNB and the target base station is an eNB
  • the source core network can be a 5G core network
  • the target core network can be a 4G core network.
  • FIG. 2 shows a schematic diagram of a handover evaluation system 2.
  • the handover evaluation system 2 includes a source base station 21, a target base station 24, a terminal 25, and a source core network device.
  • the target core network device where the source base station 21 is a gNB, and the target base station is an eNB base station.
  • the source core network device is an AMF network element 22, and the target core network device is an MME network element 23.
  • the source base station 21 and the AMF network element 22 can communicate through an NG interface
  • the target base station 24 and the MME network element 23 can communicate through an S1 interface
  • the AMF network element 22 and the MME network element 23 can interact through an N26 interface.
  • the configuration sending module 602 may first send the measurement configuration information and the necessity evaluation information to the AMF network element 22 through the NG interface, and then the AMF network element 22 sends the two pieces of information to the MME network element 23 through the N26 interface, and then the MME network element 23 can send the two pieces of information to the target base station 24 through the S1 interface.
  • the handover evaluation device 60 may further include a threshold setting module (not shown in FIG. 6), when the handover evaluation device 60 determines that the system handover report indicates that the handover of the terminal is an unnecessary handover. It can be determined that the signal parameter switching threshold on the source base station side may not be set very reasonable. Of course, if the cross-system handover of only one terminal is unnecessary, it may be caused by accident, but if the report acquisition module 604 receives multiple system handover reports, and the multiple system handover reports all indicate corresponding The handover of the terminal is unnecessary. In this case, it can be determined that the handover threshold of the signal parameter set by the source base station is indeed unreasonable. Therefore, the threshold setting module can perform the handover threshold of the signal parameter according to the system handover report. Adjustment.
  • the following describes a handover reporting device, which is used to implement the handover reporting process in the handover evaluation scheme in the foregoing embodiment.
  • a schematic structural diagram of the handover reporting device is shown in FIG. 7.
  • the handover reporting device 70 includes a configuration receiving module 702, a measurement instruction module 704, a necessary evaluation module 706, and a handover report module 708.
  • the configuration receiving module 702 is configured to receive measurement configuration information and necessity evaluation information sent by a source base station; the measurement instruction module 704 It is used to send the measurement configuration information to the terminal; the necessary evaluation module 706 is used to determine whether a cross-system handover from the source base station to the base station is necessary according to the necessity evaluation information and the cell measurement result reported by the terminal; the handover report module 708 is used to When it is determined that the inter-system handover is unnecessary, a system handover report is generated and sent to the source base station.
  • the handover reporting device 70 may be deployed on a target base station.
  • the target base station may be a base station in various communication systems, such as a gNB base station in a 5G communication system or an eNB base station in an LTE system, or a 3G or Base stations in 2G communication systems can even be base stations in various future communication systems.
  • the functions of the configuration receiving module 702, the measurement instruction module 704, and the handover report module 708 can be implemented by the processor of the target base station controlling the communication device of the base station.
  • the functions of the necessary evaluation module 706 module can be implemented by the processor of the target base station.
  • the measurement instruction module 704 may instruct the terminal to measure the cell on the source base station side according to the measurement configuration information. For example, in this embodiment, the measurement instruction module 704 may send the measurement configuration information received by the configuration receiving module 702 to the terminal.
  • the source base station carries measurement configuration information and necessity assessment information in a transparent container message from the source base station to the target base station when the terminal needs to perform a cross-system handover from the base station to the target base station.
  • the handover reporting device 70 also needs to report to the source base station The side performs feedback so that the source base station indicates that the terminal that is about to perform a cross-system handover but has not completed the handover is handed over to the target base station.
  • the necessary evaluation module 706 may determine whether a cross-system handover from the source base station to the base station is necessary according to the necessity evaluation information and the cell measurement result reported by the terminal.
  • the necessity evaluation information can be used in the necessary evaluation module 706 to evaluate the cell measurement result fed back by the terminal.
  • the necessity evaluation information includes a second threshold of the signal parameter, and the necessary evaluation module 706 can determine whether the measured value of the signal parameter of the corresponding side in the cell measurement result exceeds its second threshold. Assuming that the second threshold of the signal parameter A and the second threshold of the signal parameter B are included in the necessity evaluation information, the necessary evaluation module 706 needs to evaluate whether the measurement value of the signal parameter A in the cell measurement result exceeds the second threshold of A, And whether the measurement value of the signal parameter B in the cell measurement result exceeds the second threshold of B in the necessity evaluation information.
  • the second threshold of the signal parameter is set by the source base station.
  • the source base station sets the second threshold of the signal parameter, it needs to consider the minimum value of the signal parameter that can provide services to the terminal.
  • the signal parameter is RSRP
  • the source base station needs to consider the minimum value of the terminal RSRP when the base station provides services to the terminal.
  • the second threshold cannot be lower than this value, otherwise
  • the RSRP measurement value of the cell is higher than its second threshold in the cell measurement result reported by the terminal, the necessary evaluation module 706 is still unable to determine whether the RSRP of the current cell meets the requirements for providing services. Therefore, in this embodiment, the second threshold of a signal parameter is generally slightly higher than the lowest value of the signal parameter when the terminal is served.
  • the necessary evaluation module 706 determines that among the M cell measurement results reported by the terminal, the measurement results of at least N cells are characterized as meeting the service requirements of the terminal, the necessary evaluation module 706 judges the terminal The cross-system handover from the source base station to the base station side is not necessary and belongs to an unnecessary handover.
  • the necessary evaluation module 706 can determine that the cross-system handover from the source base station to the base station side is a necessary handover.
  • N is less than or equal to M. In an example of this embodiment, N is equal to 1. Therefore, as long as the necessary evaluation module 706 determines that among the measurement results of each cell reported by the terminal, the measurement values of each signal parameter in at least one of the cell measurement results meet the necessity evaluation information.
  • the necessary evaluation module 706 determines that the inter-system handover of the terminal is an unnecessary handover, because if the terminal continues to reside on the source base station side, at least there may be a cell corresponding to the measurement result of the cell that can meet the service requirements of the terminal. However, if the target base station determines that the measurement results of each cell reported by the terminal have more or less measurement values of some signal parameters that do not meet the corresponding indicator requirements in the necessity evaluation information, the necessary evaluation module 706 determines that the cross-system handover of the terminal belongs to Handover is necessary because during the measurement time of the terminal, no cell on the source base station side can meet the service requirements of the terminal. Therefore, if the terminal continues to reside under the source base station, the source base station cannot provide the terminal with a user satisfaction. demand.
  • the necessary evaluation module 706 determines the necessity of the inter-system handover of the terminal according to the necessity evaluation information and the cell measurement result reported by the terminal
  • the handover report module 708 determines that the inter-system handover of the terminal is an unnecessary handover
  • a system handover report is generated and sent For the source base station, let the source base station know that the terminal is currently performing an unnecessary system handover according to the system handover report, and then can evaluate whether the setting of the signal parameter handover threshold is appropriate based on the received system handover report.
  • the system handover report is generated by the handover report module 708 and sent to the source base station when it is determined that an unnecessary handover has occurred on the terminal, the system handover report should include information that can characterize the handover of the terminal as an unnecessary handover. information.
  • the handover reporting module 708 can generate a system handover report and send it to the source base station regardless of whether a terminal handover is necessary.
  • the handover reports generated for the two scenarios of unnecessary switching and necessary switching of the terminal are different.
  • the necessity of a cross-system handover of a terminal can be represented by a "handover problem": if the cross-system handover of the terminal from the source base station to the target base station is right or wrong If the handover is necessary, the information carried in the handover problem may be information that can characterize the handover as "unnecessary intersystem handover"; otherwise, the information carried in the handover problem may be other information.
  • the information in the handover problem can be "0", “1", and “2", where “0" indicates that the handover problem is an unnecessary system handover, and “1" indicates that the handover of the terminal is due to the first problem, " 2 "characterizes the handover of the terminal because of the second problem.
  • the necessary evaluation module 706 determines that the cross-system handover of the terminal is unnecessary, the system handover report generated by the handover report module 708 should carry the value in the handover problem. 0 ".
  • the system handover report may include at least one of the following types in addition to the information characterizing the necessity of the terminal's cross-system handover, such as a handover problem.
  • the serving cell on the source base station side is a cell where the terminal leaves the source base station and switches to the source base station side before switching to the target base station side.
  • the target serving cell identity of the target base station side refers to the cell where the target base station side provides services to the terminal after the terminal implements cross-system handover.
  • the source base station side meets the cell measurement results and the corresponding cell identifiers required by the indicators in the necessity assessment information. If the target base station determines that the measurement values of the signal parameters in the cell measurement results of the K cells on the source base station side are greater than the second threshold of the corresponding signal parameters in the necessity assessment information, the target base station may identify the cell IDs of the K cells And the cell measurement results of the K cells are carried in the system handover report and sent to the source base station together.
  • the system handover report also includes the terminal Reported beam information and corresponding beam measurement results. If the measurement configuration information further indicates the maximum number of reported beam information and its corresponding beam measurement results, the beam information carried in the system handover report and the number of beam measurement results meet the maximum number requirements.
  • the target base station and the source base station can communicate through the target core network device and the source core network device. Therefore, in an example of this embodiment, the handover report module 708 can The system switching report is sent to the target core network device first, and then the target core network device sends it to the source base station through the source core network device.
  • the handover report module 708 may first send the system handover report to the MME network element 23 through the S1 interface through the target base station 24, and then the MME The network element 23 sends the AMF network element 22 through the N26 interface.
  • the AMF network element 22 After the AMF network element 22 receives the system handover report from the target base station 24, it will send the system handover report to the source base station 21 through the NG interface. It can be understood that the communication mode between the handover report module 708 and the source base station is not limited to the one described in this example.
  • this embodiment also provides a handover detection device, which is used to implement the handover measurement process in the handover evaluation scheme in the foregoing embodiment; please refer to a schematic structural diagram of the handover detection device 80 shown in FIG. 8.
  • the handover detection device 80 includes a configuration acquisition module 802, a cell measurement module 804, and a measurement report module 806.
  • the configuration acquisition module 802 is configured to receive measurement configuration information from the source base station sent by the target base station; the measurement instruction module 804 is configured to The cell on the source base station side is measured; the necessary evaluation module 806 is used to report the cell measurement result to the target base station.
  • the handover detection device 80 may be deployed on a terminal, and the terminal may be a terminal supporting any current communication system or a terminal supporting a future communication system.
  • the functions of the configuration acquisition module 802, the cell measurement module 804, and the measurement report module 806 can be implemented by the terminal's processor controlling the communication unit.
  • the cell measurement module 804 can measure the cell on the source base station side based on the measurement configuration information, and then the measurement report module 806 makes a measurement based on the cell to the target base station. Feedback the measurement result, that is, send the cell measurement result to the target base station.
  • the cell measurement module 804 since the source base station is gNB, the cell measurement module 804 actually measures the cell on the source base station side based on the measurement of the beam in the cell.
  • the source base station configures a beam measurement instruction and a cell measurement strategy.
  • the beam measurement instruction allows the cell measurement module 804 to measure each beam in the cell of the source base station side in units of beams. It can be understood that, under the source base station, there is at least one cell, and the source base station will configure at least one beam for each cell.
  • the cell measurement module 804 can obtain the measurement results of each beam in the cell according to the beam measurement instruction. In order to obtain the cell measurement results, the cell measurement module 804 can determine the measurement results of each beam based on the cell measurement strategy in the measurement configuration information. Show the measurement results on the cell.
  • the target base station is an eNB.
  • the physical layer obtains the measurement of multiple beams in the cell by measuring the SSB. result.
  • the beam measurement indication may include measurement configuration information of the source base station-side SSB.
  • the beam measurement indication also includes the measurement period, measurement target bandwidth, and measurement frequency list configured by the source base station. The measurement period is used to indicate in which time period the cell measurement module 804 measures a cell on the source base station side.
  • the measurement target bandwidth and measurement frequency list are mainly used for the cell measurement module 804 to determine a measurement target.
  • the cell measurement strategy instructs the cell measurement module 804 to derive a measurement result for the cell based on the measurement results of each beam in the cell.
  • the cell measurement strategy only instructs the cell measurement module 804 to select a part from the beam measurement results of the cell as a basis for deriving the cell measurement results.
  • the cell measurement strategy instructs the cell measurement module 804 how to make a selection and how many beam measurement results to select.
  • the cell measurement module 804 selects the beam measurement results that are involved in determining the cell measurement results according to the cell measurement strategy, and then calculates according to the selected beam measurement results to obtain the cell measurement results. For example, the cell measurement module 804 Each selected beam measurement result is averaged, and the cell measurement result is calculated.
  • the measurement report module 806 sends the cell measurement results to the target base station, so that the target base station judges whether the handover of the terminal from the source base station to the target base station is necessary.
  • the handover evaluation device, the handover reporting device, and the handover detection device provided in this embodiment cooperate with each other to allow the source base station to know whether the current cross-system handover of the terminal is a necessary handover after the terminal is handed over from the source base station to the target base station, and then reflect on Whether the signal parameter switching threshold that can cause the terminal to perform cross-system switching on the local side is properly set.
  • the handover evaluation scheme in this embodiment is actually a This feedback method allows the source base station to consider the terminal's feedback on the current signal parameter switching threshold when setting / adjusting the signal parameter switching threshold, thereby setting a more reasonable switching threshold, reducing unnecessary switching on the terminal side, and improving the terminal. User experience.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the storage medium may store one or more computer programs that can be read, compiled, and executed by one or more processors.
  • the storage medium may store a switch.
  • At least one of an evaluation program, a handover report program, and a handover detection program wherein the handover evaluation program can be used by one or more processors to implement steps in any one of the handover evaluation methods described in the first embodiment or the second embodiment.
  • the handover report program may be used by one or more processors to implement steps in any one of the handover report methods described in the first embodiment or the second embodiment.
  • the handover detection program may be used by one or more processors to implement steps in any one of the handover detection methods described in the first embodiment or the second embodiment.
  • This embodiment also provides a base station. Refer to the schematic diagram of the hardware structure of the base station shown in FIG. 9:
  • the base station 90 includes a first processor 91, a first memory 92, and a first communication bus 93 for connecting the first processor 91 and the first memory 92.
  • the first memory 92 may be the aforementioned one that stores a first uplink transmission program. Storage media.
  • the first processor 91 may read the handover evaluation program stored in the first memory 92, compile and execute the steps of implementing any one of the handover evaluation methods described in the first to second embodiments.
  • the first memory 92 may be the foregoing storage medium storing the switching report program.
  • the first processor 91 may read the handover report program stored in the first memory 92, compile and execute the steps of implementing any one of the handover report methods described in the first to second embodiments.
  • the base station 90 may be an NG-RAN base station; if a handover report program is stored in the first memory, the base station 90 may be an evolved base station.
  • the terminal 10 includes a second processor 101, a second memory 102, and a second communication bus 103 for connecting the second processor 101 and the second memory 102.
  • the second memory 102 may be the foregoing storage medium storing a switching detection program.
  • the second processor 101 can read the handover detection program stored in the second memory 102, compile and execute the steps for implementing any one of the handover detection methods described in the first to second embodiments.
  • the method for implementing the handover detection in the first to second embodiments of the terminal 10 reference may be made to the description of the foregoing embodiments, and details are not described herein again.
  • the source base station sends measurement configuration information and necessity assessment information to the target base station, so that the target base station instructs the terminal to measure the cell on the source base station side according to the measurement configuration information. And send a cell measurement result for the cell to the target base station.
  • the target base station After receiving the cell measurement result sent by the terminal, the target base station can determine whether the terminal is necessary for this cross-system handover from the source base station to the target system based on the cell measurement result and the necessity assessment information sent by the source base station.
  • the way for the base station to feedback the necessity of the cross-system handover of the terminal so that the source base station can determine the rationality of the signal parameter switching threshold setting based on the feedback, which is beneficial to improving the communication effect and communication experience on the terminal side.
  • modules or steps of the embodiments of the present invention described above can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed by multiple computing devices.
  • they can be implemented with program code executable by a computing device, so that they can be stored in a computer storage medium (Read Only Memory / Random Access Memory, ROM / RAM), magnetic disks, and optical disks) are executed by computing devices, and in some cases, the steps shown or described can be performed in a different order than here, or they can be made into individual integrated circuit modules, Or multiple modules or steps in them are made into a single integrated circuit module for implementation. Therefore, this application is not limited to any specific combination of hardware and software.

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Abstract

本发明实施例提供一种切换评估、报告方法、装置及基站,源基站通过向目标基站发送测量配置信息和必要性评估信息,让目标基站指示终端根据测量配置信息对源基站侧的小区进行测量,目标基站在根据终端发送的小区测量结果确定终端的跨系统切换为非必要切换时,生成表征终端本次切换为非必要切换的系统切换报告发送给源基站,从而让源基站根据该系统切换报告了解到终端当前进行了不必要的跨系统切换。

Description

一种切换评估、报告方法、装置及基站
本申请要求在2018年06月22日提交中国专利局、申请号为201810653869.4的中国专利申请的优先权,该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,尤其涉及一种切换评估、报告方法、装置及基站。
背景技术
在NR(New Radio,新空口)下,终端的跨系统切换是指NR系统和EUTRA(Evolved UTRA,演进型通用陆地无线接入)系统之间的切换。终端进行NR系统到EUTRA系统的切换时,通常是因为终端检测到NR系统服务小区当前的信号参数不满足gNB(NG-RAN NodeB,5G基站)设置的参数门限,因此需要回落到EUTRA系统中,由eNB(Evolved Node B,演进基站)提供服务。不过如果gNB对服务小区信号参数门限值的设置不合理,例如将参数门限设置得过高,可能会导致在gNB的覆盖能够满足终端服务需求的时候,终端也出现跨系统切换的情况,这种跨系统切换属于不合理也是不必要的切换,但是目前,gNB并不能确定终端的切换是否必要。
发明内容
本发明实施例提供的一种切换评估、报告方法、装置及基站,主要解决的技术问题是:提供一种系统切换检测评估方案以解决现有技术中基站不能确定终端当前的系统切换是否必要的问题。
为解决上述技术问题,本发明实施例提供一种切换评估方法,包括:将测量配置信息和必要性评估信息发送给目标基站,测量配置信息用于目标基站指示终端对源基站侧的小区进行测量并上报小区测量结果;获取目标基站根据小区测量结果和必要性评估信息生成的系统切换报告,系统切换报告表征终端从本基站到目标基站的跨系统切换为非必要切换。
可选地,获取目标基站根据小区测量结果和必要性评估信息生成的系统切换报告之后,还包括:根据系统切换报告对能引起终端进行跨系统切换的信号参数切换门限进行调整。
可选地,将测量配置信息和必要性评估信息发送给目标基站包括:将测量配置信息和必要性评估信息发送给源核心网设备,以供源核心网设备通过目标核心网设备将测量配置信息和必要性评估信息发送给目标基站;且/或,获取目标基站根据小区测量结果和必要性评估信息生成的系统切换报告包括:接收目标基站依次通过目标核心网设备、源核心网设备发送的系统切换报告。
可选地,将测量配置信息和必要性评估信息发送给源核心网设备包括:在确定终端需进行从本基站到目标基站的跨系统切换时,将测量配置信息和必要性评估信息携带在源基站到目标基站的透明容器消息发送给源核心网设备。
可选地,测量配置信息中包括波束测量指示和小区测量策略,波束测量指示用于终端对源基站侧小区的波束进行测量;小区测量策略用于终端根据对源基站侧小区波束的测量结果确定小区测量结果。
可选地,波束测量指示中包括以下几种信息中的至少一种:测量时段、测量目标带宽以及测量频点列表以及源基站侧同步信号/物理广播信道块SSB的测量配置信息。
可选地,波束测量指示中还包括以下两种中的至少一种:是否上报波束信息及其对应波束测量结果的指示;上报波束信息及其对应波束测量结果的最大数目。
可选地,小区测量策略用于指示终端根据信号参数的第一门限选择预设数目的波束测量结果,并根据选择出的波束测量推导得到小区测量结果。
本发明实施例还提供一种切换报告方法,包括:接收源基站发送的测量配置信息和必要性评估信息;将测量配置信息发送给终端,测量配置信息用于指示终端对源基站侧的小区进行测量并上报小区测量结果;根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要;在确定跨系统切换为非必要切换时生成系统切换报告并发送给源基站。
可选地,系统切换报告中包括切换问题,切换问题用于表征终端跨系统切换为非必要切换;系统切换报告还包括以下几种信息中的至少一种:终端本次跨系统切换的切换类型;源基站侧服务小区标识;目标基站侧服务小区标识;源基站侧满足必要性评估信息中各指标要求的小区测量结果以及对应小区标识。
可选地,系统切换报告中还包括:终端上报的小区波束信息和波束对应的波束测量结果。
可选地,接收源基站发送的测量配置信息和必要性评估信息包括:从目标核心网设备处接收由源基站通过源核心网设备发送的测量配置信息和必要性评估信息;且/或,将系统切换报告发送给源基站包括:将系统切换报告依次通过目标核心网设备、源核心网设备发送给源基站。
可选地,根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要包括:在确定终端上报的至少一个小区测量结果中各信号参数的测量值均满足必要性评估信息中对应的指标要求时,确定终端的跨系统切换为非必要切换;在确定终端上报的各小区测量结果中均存在至少一个信号参数的测量值不满足必要性评估信息中对应的指标要求时,确定终端的跨系统切换为必要切换。
可选地,测量配置信息中包括波束测量指示和小区测量策略,波束测量指示用于终端对源基站侧小区的波束进行测量;小区测量策略用于终端根据对源基站侧小区波束的测量结果确定小区测量结果。
本发明实施例还提供一种切换检测方法,包括:接收目标基站发送的来自源基站的测量配置信息;根据测量配置信息对源基站侧的小区进行测量;向目标基站上报小区测量结果,小区测量结果用于目标基站结合来自源基站的必要性评估信息生成系统切换报告并发送给源基站,系统切换报告表征本终端从源 基站到目标基站的跨系统切换为非必要切换。
可选地,测量配置信息中包括波束测量指示和小区测量策略;根据测量配置信息对源基站侧的小区进行测量包括:根据波束测量指示对源基站侧的小区波束进行测量;根据小区测量策略和对小区波束的测量结果确定小区测量结果。
可选地,波束测量指示包括中包括以下几种信息中的至少一种:测量时段、测量目标带宽以及测量频点列表以及源基站侧同步信号/物理广播信道块SSB的测量配置信息。
可选地,波束测量指示中还包括以下两种中的至少一种:是否上报波束信息及其对应波束测量结果的指示;上报波束信息及其对应波束测量结果的最大数目。
可选地,根据小区测量策略和对小区波束的测量结果确定小区测量结果包括:根据小区测量策略中携带的第一信号参数门限选择预设数目的波束测量结果;根据选择出的波束测量结果推导小区测量结果。
本发明实施例还提供一种切换评估装置,包括:配置发送模块,用于将测量配置信息和必要性评估信息发送给目标基站,测量配置信息用于目标基站指示终端对源基站侧的小区进行测量并上报小区测量结果;报告获取模块,用于获取目标基站根据小区测量结果和必要性评估信息生成的系统切换报告,系统切换报告表征终端从本基站到目标基站的跨系统切换为非必要切换。
本发明实施例还提供一种切换报告装置,包括:配置接收模块,用于接收源基站发送的测量配置信息和必要性评估信息;测量指示模块,用于将测量配置信息发送给终端,测量配置信息用于指示终端对源基站侧的小区进行测量并上报小区测量结果;必要评估模块,用于根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要;切换报告模块,用于在确定跨系统切换为非必要切换时生成系统切换报告并发送给源基站。
本发明实施例还提供一种切换检测装置,包括:配置获取模块,用于接收目标基站发送的来自源基站的测量配置信息;小区测量模块,用于根据测量配置信息对源基站侧的小区进行测量;测量报告模块,用于向目标基站上报小区测量结果,小区测量结果用于目标基站结合来自源基站的必要性评估信息生成系统切换报告并发送给源基站,系统切换报告表征本终端从源基站到目标基站的跨系统切换为非必要切换。
本发明实施例还提供一种基站,其特征在于,包括第一处理器、第一存储器及第一通信总线;第一通信总线用于实现第一处理器和第一存储器之间的连接通信;第一处理器用于执行第一存储器中存储的切换评估程序,以实现如上任一项的切换评估方法的步骤;或,第一处理器用于执行第一存储器中存储的切换报告程序,以实现如上任一项的切换报告方法的步骤。
可选地,若第一存储器中存储有切换评估程序,则基站为NG-RAN基站;若第一存储器中存储有切换报告程序,则基站为演进基站。
本发明实施例还提供一种终端,其特征在于,包括第二处理器、第二存储器及第二通信总线;第二通信总线用于实现第二处理器和第二存储器之间的连 接通信;第二处理器用于执行第二存储器中存储的切换检测程序,以实现如上任一项的切换检测方法的步骤。
本发明实施例还提供一种存储介质,存储介质中至少存储有切换评估程序、切换报告程序以及切换检测程序中的至少一个,切换评估程序可被一个或者多个处理器执行,以实现如上任一项的切换评估方法的步骤;切换报告程序可被一个或者多个处理器执行,以实现如上任一项的切换报告方法的步骤;切换检测程序可被一个或者多个处理器执行,以实现如上任一项的切换检测方法的步骤。
本发明的有益效果是:
根据本发明实施例提供的切换评估、报告方法、装置及基站,源基站通过向目标基站发送测量配置信息和必要性评估信息,让目标基站根据测量配置信息指示终端根据测量配置信息对源基站侧的小区进行测量,并向目标基站发送针对小区的小区测量结果。目标基站在接收到终端发送的小区测量结果后,可以根据小区测量结果以及源基站发送的必要性评估信息确定终端本次从源基站到目标系统的跨系统切换是否必要,并在确定终端的跨系统切换为非必要切换时,生成表征终端本次切换为非必要切换的系统切换报告发送给源基站,让源基站根据该系统切换报告了解到终端当前进行了不必要的跨系统切换,从而获悉本侧的信号参数切换门限可能并不合理。进一步地,目标基站向源基站发送的系统切换报告可以作为源基站反思、评价源基站侧设置的能引起终端进行跨系统切换的信号参数切换门限是否合理的基础,相对于现有方案中基站不关心终端跨系统切换必要性,不了解本侧信号参数切换门限设置是否合理的情况,本发明实施例方案中提供了一种向源基站反馈终端跨系统切换必要性的途径,让源基站可以基于该反馈确定本侧信号参数切换门限设置的合理性,有利于对终端侧的通信效果、通信体验进行改善。
本申请其他特征和相应的有益效果在说明书的后面部分进行阐述说明,且应当理解,至少部分有益效果从本申请说明书中的记载变的显而易见。
附图说明
图1为本发明实施例一中提供的切换评估方案的一种流程图;
图2为本发明实施例一中提供的切换评估系统的一种结构示意图;
图3为本发明实施例二中提供的切换评估系统中各设备的一种交互示意图;
图4为本发明实施例二中提供的终端根据波束测量结果推导小区测量结果的一种流程图;
图5为本发明实施例二中提供的终端对源基站侧小区进行测量的一种模型示意图;
图6为本发明实施例三中提供的切换评估装置的一种结构示意图;
图7为本发明实施例三中提供的切换报告装置的一种结构示意图;
图8为本发明实施例三中提供的切换检测装置的一种结构示意图;
图9为本发明实施例四中提供的基站的一种硬件结构示意图;
图10为本发明实施例四中提供的终端的一种硬件结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白,下面通过具体实施方式结合附图对本发明实施例作进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
实施例一:
为了解决现有技术中基站侧不关心终端的跨系统切换是否必要,不能了解本侧信号参数门限值设置合理性的问题,本实施例提供一种切换评估方案,该切换评估方案可以由包括源基站、目标基站以及终端的切换评估系统实现,下面结合图1示出的切换评估方案中源基站、目标基站以及终端的交互图对该方案进行介绍。
S102:源基站将测量配置信息和必要性评估信息发送给目标基站。
源基站是指终端进行跨系统切换之前为终端提供服务的基站,而目标基站自然是在终端完成跨系统切换后为终端提供服务的基站。所谓跨系统切换,顾名思义是指终端从一种通信系统的基站切换到另一种通信系统的基站下。当然,跨系统切换可能是从使用通信技术较老的基站(以下简称“老基站”)切换到通信技术更新的基站(以下简称“新基站”),例如从4G通信系统中的eNB基站切换到5G通信系统中的gNB基站;也可能是从新基站切换到老基站。例如终端从gNB基站切换到eNB基站或者2G、3G通信系统中的基站。可以理解的是,如果新基站提当前的覆盖情况满足终端的服务需求,则应当尽量让终端驻留在新基站下,由新基站为终端提供通信服务,这样有利于提升终端侧用户的通信体验。所以,在本实施例中,源基站需要了解终端跨系统切换必要性的情景是指终端从新基站切换到老基站下。对于终端从老基站到新基站的跨系统切换,源基站可以不必关心其必要性,因为这是有利于终端侧用户体验的。
测量配置信息用于指示终端对源基站侧的小区进行测量,并上报对小区测量得到的小区测量结果。所以,在测量配置信息中,至少存在用于向终端指示测量目标的信息,以及指示终端如何进行测量的测量策略信息。当目标基站获取到该测量配置信息之后,可以指示终端根据测量配置信息中的指示对源基站侧的小区进行测量。
必要性评估信息用于目标基站对终端上报的小区测量结果进行评判,从而确定终端从源基站到目标基站侧跨系统切换是否必要。可以理解的是,在必要性评估信息中,可以包括对终端跨系统切换是否必要进行评判的至少一个信号参数的指标,例如,这些指标可以是信号参数的第二门限。这里所谓的信号参数可以包括但不限于RSRP(Reference Signal Received Power,参考信号接收功率)、RSRQ(Reference Signal Received Quality,参考信号接收质量)以及SINR(Signal to Interference plus Noise Ratio,信号与干扰加噪声比)中的至少一个。例如,当信号参数同时包括RSRP和SINR时,在必要性评估信息中可以同时包括RSRP的第二门限以及SINR的第二门限。
在本实施例中不具体限定源基站与目标基站之间的通信方式,任何可以让源基站将测量配置信息和必要性评估信息发送给目标基站的方式、途径都是可行的,例如二者之间可以直接通信,或者也可以通过其他设备进行通信。
可以理解的是,切换评估系统中不仅可以包括前面提到的源基站、目标基站以及终端,还可以包括其他网络设备,例如在本实施例的一种示例当中,切换评估系统还包括源核心网设备和目标核心网设备,其中源核心网设备为源基站侧通信系统中的核心网设备,而目标核心网设备为目标基站侧通信系统中的核心网设备。例如,如果源基站为gNB,而目标基站为eNB,则源核心网可以为5G核心网,则目标核心网可以为4G核心网。
在本实施例的一些示例中,如图2所示,图2示出了一种切换评估系统2的示意图:切换评估系统2包括源基站21、目标基站24、终端25以及源核心网设备、目标核心网设备,其中源基站21为gNB,目标基站为eNB基站,对应地,源核心网设备为AMF(Access Mobility Function,接入移动功能)网元22,而目标核心网设备为MME(Mobility Management Entity,移动管理实体)网元23。源基站21与AMF网元22可以通过NG接口进行通信,目标基站24与MME网元23之间可以通过S1接口进行通信,而AMF网元22和MME网元23之间可以通过N26接口交互。因此,在该示例当中,源基站21可以先将测量配置信息和必要性评估信息通过NG接口发送给AMF网元22,然后由AMF网元22通过N26接口将这两个信息发送给MME网元23,随后MME网元23可以通过S1接口将这两个信息发送到目标基站24上。
S104:目标基站将接收到的测量配置信息发送给终端。
目标基站接收到源基站发送的测量配置信息和必要性评估信息之后,可以指示终端根据测量配置信息对源基站侧的小区进行测量。例如,在本实施例中,目标基站可以将接收到的测量配置信息发送给终端。
在本实施例的一些示例当中,源基站是在终端需要进行从本基站到目标基站的跨系统切换时,将测量配置信息和必要性评估信息携带在源基站到目标基站的透明容器消息中发送给目标基站的,因此,在目标基站通过源基站到目标基站的透明容器消息获取到测量配置信息和必要性评估信息后,还需要向源基站侧进行反馈,让源基站指示即将进行跨系统切换但尚未完成切换的终端切换到目标基站下。
S106:终端根据测量配置信息对源基站侧的小区进行测量。
终端在从目标基站处获取到测量配置信息之后,可以根据测量配置信息对源基站侧的小区进行测量,并基于小区向目标基站反馈测量结果,也即向目标基站发送小区测量结果。
在本实施例的一些示例当中,由于源基站是gNB,所以,终端对源基站侧的小区进行测量实际是基于对小区中波束(beam)的测量进行的。在测量配置信息中,源基站会配置波束测量指示和小区测量策略,波束测量指示可以让终端以波束为单位对源基站侧小区中的各波束进行测量。可以理解的是,在源基站下,有至少一个小区,源基站为每一个小区会配置至少一个波束。终端根据 波束测量指示能够得到的是小区中每个波束的测量结果,为了获得小区测量结果,终端可以根据测量配置信息中的小区测量策略,基于对各波束的测量结果确定出对小区的测量结果。
假定目标基站是eNB,考虑到LTE(Long Term Evolution,长期演进)系统中终端对NR系统的测量只支持测量SSB(SS/PBCH block,同步信号/物理广播信道块),所以,在本实施例的一些示例中,物理层通过测量SSB来获得小区中多个波束的测量结果。在这种示例当中,波束测量指示可以包括源基站侧SSB的测量配置信息。除了源基站侧SSB测量配置信息以外,在波束测量指示中还包括源基站配置的测量时段、测量目标带宽、测量频点列表。其中测量时段用于指示终端在哪一时间段中对源基站侧的小区进行测量。测量目标带宽和测量频点列表主要用于让终端确定测量目标。
在本实施例的一些示例当中,小区测量策略会指示终端基于小区中各波束的测量结果推导出针对小区的测量结果。不过在更多的示例当中,小区测量策略只会指示终端从小区的各波束测量结果中选择出部分,作为推导小区测量结果的基础。小区测量策略中会指示终端如何进行选择,以及选择多少波束测量结果。在这种方案当中,终端在根据小区测量策略选择出参与确定小区测量结果的各波束测量结果后,根据选择出的波束测量结果进行计算,得到小区测量结果,例如终端对选择出的各波束测量结果求均值,计算得到小区测量结果。
S108:终端向目标基站上报小区测量结果。
终端获取到针对源基站下各小区的小区测量结果之后,将小区测量结果发送给目标基站,以便目标基站评判终端从源基站到目标基站的切换是否必要。
S110:目标基站根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要。
根据前面的介绍可知,在必要性评估信息可用于目标基站对终端反馈的小区测量结果进行评价。必要性评估信息中包括信号参数的第二门限,目标基站可以确定小区测量结果中对应侧信号参数测量值是否超过它的第二门限。假定在必要性评估信息中包括信号参数A的第二门限和信号参数B的第二门限,则目标基站需要评估小区测量结果中对信号参数A的测量值是否超过A的第二门限,以及小区测量结果中信号参数B的测量值是否超过必要性评估信息中B的第二门限。
可以理解的是,由于必要性评估信息来自于源基站侧,因此信号参数第二门限由源基站设置。源基站在设置信号参数的第二门限时,需要考虑能够为终端提供服务的信号参数的最低值。例如,假定信号参数为RSRP,则源基站需要考虑本基站为终端提供服务的时候,终端RSRP的最低值是多少,在设置RSRP的第二门限时,不能让第二门限低于该值,否则,当终端上报的小区测量结果中,小区的RSRP测量值高于其第二门限时,目标基站依旧无法确定当前小区的RSRP是否满足提供服务的要求。所以,在本实施例中,一个信号参数的第二门限通常比为终端提供服务时该信号参数的最低值略高一点。
对于每一个小区而言,若小区测量结果中各信号参数的测量值均满足测量 评估信息中对应的指标要求,则说明至少在终端进行测量的这一段时间内,该小区实际上是可以向终端提供满足其服务需求的信号覆盖的。在本实施例的一些示例当中,如果目标基站确定在终端上报的M个小区测量结果中,有至少N个小区的测量结果都表征可以满足终端的服务需求,则目标基站判断终端从源基站到本基站侧的跨系统切换没有必要,属于非必要切换。如果M个小区测量结果中满足必要性评估信息各指标要求的小区测量结果不足N个,则目标基站可以判定终端从源基站到本基站侧的跨系统切换属于必要切换。N小于等于M。在本实施例的一个示例当中,N等于1,所以,只要目标基站确定终端上报的各小区测量结果中,至少有一个小区测量结果中各信号参数的测量值均满足必要性评估信息中对应的指标要求,则目标基站判定终端的跨系统切换属于非必要切换,因为如果终端继续驻留在源基站侧,至少可有该小区测量结果对应的小区可以满足终端的服务需求。但是如果目标基站确定终端上报的各小区测量结果中,都或多或少存在一些信号参数的测量值不满足必要性评估信息中对应的指标要求,则目标基站确定终端的跨系统切换属于必要切换,因为在终端的这段测量时间中,源基站侧没有一个小区能够满足终端的服务需求,因此,如果终端继续驻留在源基站下,则源基站没办法向终端提供令用户满意的需求。
S112:目标基站在确定跨系统切换为非必要切换时生成系统切换报告并发送给源基站。
目标基站在根据必要性评估信息和终端上报的小区测量结果确定出终端跨系统切换的必要性之后,如果确定终端的跨系统切换为非必要切换,则生成系统切换报告发送给源基站,让源基站根据该系统切换报告了解到终端当前发生了非必要的系统切换,进而可以基于接收到的系统切换报告评估其对信号参数切换门限的设置是否合适。可以理解的是,由于该系统切换报告是目标基站在确定终端发生了非必要切换时生成并发送给源基站的,因此,该系统切换报告应该包括能够表征终端的切换为非必要切换的信息。
在本实施例的一些示例当中,无论终端的切换是否必要,目标基站都可以生成系统切换报告,并发送给源基站。不过可以理解的是,针对终端发生非必要切换和必要切换着两种情景生成的切换报告是不同的,至少目标基站在终端发生了必要的跨系统切换时生成的系统切换不能表征终端的跨系统切换不必要。在本实施例的一种示例当中,目标基站生成的系统切换报告中,可以通过“切换问题”来表征终端跨系统切换的必要性:如果终端从源基站到目标基站的跨系统切换是非必要切换,则切换问题中携带的信息可以是能够表征切换为“非必要的系统间切换”的信息,否则,切换问题中携带的信息可能就是其他信息。例如,假定切换问题中的信息可以是“0”、“1”、“2”,其中“0”表征切换问题为非必要的系统切换,“1”表征终端的切换是因为第一问题,“2”表征终端的切换是因为第二问题,则当目标基站确定终端的跨系统切换为非必要切换后,生成的系统切换报告中,切换问题中携带的值应当是“0”。
在本实施例的其他一些示例当中,系统切换报告中除了表征终端跨系统切换必要性的信息,例如切换问题以外,还可以包括以下几种中的至少一种:
1)终端本次跨系统切换的切换类型。
2)源基站侧服务小区标识,源基站侧的服务小区为终端离开源基站,切换到目标基站侧前在源基站侧驻留的小区。
3)目标基站侧服务小区标识,目标基站侧的服务小区是指终端实现跨系统切换后,目标基站侧为终端提供服务的小区。
4)源基站侧满足必要性评估信息中各指标要求的小区测量结果以及对应小区标识。如果目标基站确定在源基站侧有K个小区的小区测量结果中各信号参数的测量值均大于必要性评估信息中对应信号参数的第二门限,则目标基站可以将这K个小区的小区标识以及这K个小区的小区测量结果携带在系统切换报告中一同发送给源基站。
5)波束信息和对应的波束测量结果。如果源基站配置的测量配置信息中包括“是否上报波束信息及其对应波束测量结果的指示”,且该指示指示终端需要上报波束信息以及波束对应的测量结果,则在系统切换报告中还包括终端上报的波束信息及对应的波束测量结果。如果测量配置信息中还进一步指示了上报波束信息及其对应波束测量结果的最大数目,则系统切换报告中携带的波束信息以及波束测量结果的数目符合最大数目的要求。
根据前述介绍可知,在一些切换评估系统当中,目标基站与源基站之间可以通过目标核心网设备、源核心网设备进行通信,所以,在本实施例的一种示例当中,目标基站可以将系统切换报告先发送给目标核心网设备,然后由目标核心网设备将其通过源核心网设备发送给源基站。结合图2示出的切换评估系统2,目标基站24可以先将系统切换报告通过S1接口发送给MME网元23,然后由MME网元23通过N26接口发送给AMF网元22,AMF网元22接收到来自目标基站24的系统切换报告之后,将会把系统切换报告通过NG接口发送给源基站21。可以理解的是目标基站与源基站之间的通信方式不限于本示例中介绍的这一种。
在本实施例中,当源基站接收到目标基站发送的系统切换报告之后,可以确定终端切换到目标基站的必要性。更进一步地,当源基站确定系统切换报告表征终端的切换为非必要切换的时候,可以确定本侧的信号参数切换门限可能设置得并不十分合理。当然,如果仅有某一个终端的跨系统切换时非必要切换,则可能是因为偶然因素引起的,但如果源基站接收到多个系统切换报告,且这多个系统切换报告均表征对应终端的切换为非必要切换,那么在这种情况下,源基站可以确定自己对信号参数的切换门限设置得确实不合理,因此,可以根据系统切换报告对信号参数的切换门限值进行调整。
本实施例提供的切换评估方案,包括由源基站侧实现的切换评估方法、由目标基站侧实现的切换报告方法以及由终端侧实现的切换检测方法,通过源基站、目标基站、终端的相互交互,相互配合,可以在终端从源基站切换到目标基站下后,让源基站了解终端的本次跨系统切换是否为必要切换,进而反思本侧能够引起终端进行跨系统切换的信号参数切换门限是否设置合理。避免现有技术中因为源基站侧信号参数切换门限设置不合理导致终端总是进行非必要切 换而源基站不自知的问题,所以本实施例中的切换评估方案实际上是针对源基站的一种反馈方式,让源基站在设置/调整信号参数切换门限的时候,可以考虑终端侧对当前信号参数切换门限的反馈情况,进而设置出更合理的切换门限,减少终端侧的无谓切换,提升终端侧用户体验。
实施例二:
本实施例将在实施例一的基础上,结合图2中示出的切换评估系统继续对前述实施例中的切换评估方案进行介绍,可以理解的是,本实施例提供的方案不仅可以应用于终端从5G基站切换到4G基站的情景,也可以应用于其他不同系统的基站切换情景,例如从5G基站切换到3G基站,或者是从4G基站切换到3G/2G基站,甚至是从未来某一通信系统中的基站切换到现有通信系统中的基站。请参见图3示出的切换评估流程图。
S302:gNB在源基站到目标基站的透明容器消息中配置测量配置信息和必要性评估信息。
在本实施例中,gNB可以在Source eNB to Target eNB Transparent Container(源基站到目标基站的透明容器消息)中配置新的IE IRAT Measurement Configuration(跨系统测量配置信息),在IRAT Measurement Configuration(跨系统测量配置信息)中可以包括指示终端对gNB侧小区进行测量的测量配置信息以及用于目标基站eNB评判终端从gNB到eNB切换的必要性的必要性评估信息。下面给出一种IRAT Measurement Configuration的示例,IRAT Measurement Configuration中可以包括如下信息:
1)对源基站侧进行测量的时段t1-t2;2)需要对源基站侧进行测量的频点列表;3)源基站侧载频的测量带宽;4)源基站侧SSB的测量配置信息;5)信号参数的第一门限;6)终端确定小区测量结果时选择波束的最大数目Q;7)信号参数的第二门限。
其中,1)-6)是用于指示终端对gNB侧小区进行测量已得到小区测量结果的信息,因此属于测量配置信息。而7)则用于目标基站eNB确定终端的跨系统切换是否必要,因此属于必要性评估信息。对于IRAT Measurement Configuration中的测量配置信息,也即1)-6),其中1)-4)是用于指示终端对源基站gNB侧小区的波束进行测量得到波束测量结果的信息,在本实施例中,将这些信息称为“波束测量指示”。5)和6)可以指示终端从小区的各波束测量结果中选择部分,参与计算出小区的测量结果,因此在本实施例中,5)和6)是用于指示终端根据小区波束的测量结果确定小区测量结果的信息,因此,将其称为“小区测量策略”。
在IRAT Measurement Configuration中,除了上述1)-7)以外,还可以包括以下内容:
8)是否进行波束上报的指示;以及9)波束上报的最大数目。
其中,8)中的内容用于向终端指示是否需要进行波束上报,即指示终端是否需要上报波束信息以及波束对应的波束测量结果。9)中的内容是在确定需要 终端上报波束信息以及波束对应的波束测量结果时,指示终端对多少个波束进行上报。
S304:gNB将源基站到目标基站的透明容器消息携带在切换要求消息中发送给AMF网元。
在本实施例中,gNB在Source eNB to Target eNB Transparent Container消息中配置了IRAT Measurement Configuration后,可以将Source eNB to Target eNB Transparent Container消息携带在切换要求消息中发送给AMF网元。切换要求消息,即Handover Required。由于gNB可以与AMF网元通过NG接口进行通信,因此,gNB可以将Handover Required通过NG接口发送给AMF网元。
S306:AMF网元将源基站到目标基站的透明容器消息携带在迁移请求中发送给MME网元。
AMF网元接收到gNB发送的Handover Required消息之后,可以提取Handover Required消息中的Source eNB to Target eNB Transparent Container消息,根据提取出的Source eNB to Target eNB Transparent Container消息生成迁移请求,然后将迁移请求通过N26接口发送给MME网元。迁移请求,即Relocation Request。
S308:MME网元将源基站到目标基站的透明容器消息携带在切换请求消息中发送给eNB。
MME网元通过N26接口接收到AMF网元发送的Relocation Request之后,可以根据Relocation Request消息中的Source eNB to Target eNB Transparent Container消息生成Handover Request(切换请求)消息,然后通过S1接口发送给eNB。
S310:eNB向MME网元发送切换请求响应。
eNB在接收到来自Handover Request消息之后,将会根据Handover Request消息向MME网元发送Handover Request Acknowledge(切换请求响应)消息。当然,eNB还是通过S1接口向MME网元发送切换请求响应消息。
S312:MME网元向AMF网元发送迁移请求响应。
MME网元接收到目标基站eNB发送的切换请求响应消息后,可以根据切换响应消息通过N26接口向AMF网元发送Relocation Response(迁移请求响应)消息,作为AMF网元向自己发送Relocation Request消息的应答。
S314:AMF网元通过gNB向终端发送切换指令。
AMF网元接收到来自MME网元的Relocation Response消息后,可以根据Relocation Response消息通过gNB向终端发送Handover Command(切换指令)消息,指示终端根据Handover Command从源基站gNB下切换到目标基站eNB下。
S316:终端根据切换指令从gNB跨系统切换到eNB。
终端接收到gNB发送的Handover Command消息后,根据Handover Command消息切换到eNB下。可以理解的是,在本实施例一些示例当中,当终端完成从源基站到目标基站的跨系统切换后,还可以向目标基站eNB发送 Handover Complete(切换完成)消息,表示自己的跨系统切换完成。
S318:终端根据测量配置信息对gNB侧的小区的波束进行测量。
在终端从gNB下切换到eNB下之后,可以根据源基站gNB配置的测量配置信息对gNB侧小区的波束进行测量,具体地,终端是根据测量配置信息中的波束测量指示对小区中的各波束进行测量。例如,在本实施例中,终端是根据IRAT Measurement Configuration中的1)-4)对gNB侧的小区中的各波束进行测量,得到波束测量结果的。终端在IRAT Measurement Configuration指示的时间段t1-t2期间,根据IRAT Measurement Configuration中的频点列表、载频的测量带宽以及SSB的测量配置信息进行测量。
S320:终端根据测量配置信息和波束测量结果推导小区测量结果。
在gNB的一个小区中,可能会包括多个波束,终端在对这多个波束进行测量之后,可以得到每一个波束的测量结果,假定在某一个小区中包括b1、b2、…b7七个波束,则终端可以基于这七个波束的波束测量结果,根据测量配置信息中的小区测量策略推导得到小区测量结果。
在本实施例中,终端在计算小区测量结果的时候,不一定会根据该小区中全部波束的波束测量结果进行计算,而是先根据小区测量策略中的指示从各波束测量结果进行选择,选择出“优质波束”参与计算。下面结合图4对终端根据某小区中各波束的波束测量结果确定小区测量结果的过程进行介绍:
在前面的介绍中,IRAT Measurement Configuration中包括信号参数的第一门限以及终端确定小区测量结果时选择波束的最大数目Q,所以,终端可以:
S402:终端根据信号参数的第一门限从小区的各波束测量结果中选择出候选波束测量结果。
终端先从小区各波束测量结果中选择出信号参数测量值大于等于对应第一门限的作为候选波束测量结果。这里的信号参数可以是RSRP、RSRQ和SINR中的至少一个。
S404:终端判断是否存在候选波束测量结果。
若判断结果为是,则进入S408,否则进入S406。如果小区所有波束的波束测量结果中信号参数的测量值均小区对应的第一门限,则终端无法选择出候选波束测量结果,候选波束测量结果的数目为0。
S406:将各波束测量结果中信号参数测量值最高的波束测量结果作为目标波束测量结果。
由于终端没能选择出信号参数测量值高于对应第一门限的波束测量结果,所以,在本实施例中,终端选择一个测量值最优的波束测量结果作为目标波束测量结果作为推导小区测量结果的基础。
S408:终端判断候选波束测量结果的数目是否超过最大数目Q。
在本实施例中,在计算确定小区测量结果时,参与计算的波束测量结果的数目小于等于Q。所以,在终端根据信号参数的第一门限选择出候选波束测量结果之后,还会进一步判断候选波束测量结果的数目是否超过最大数目Q。若终端的判断结果为是,则进入S410,否则进入S412。
S410:终端从候选波束测量结果中选择出Q个作为目标波束测量结果。
如果终端确定候选波束测量结果的数目超过Q个,这就是说明在gNB的这个小区中,信号参数测量值超过对应第一门限的波束测量结果不只Q个,在这种情况下,终端可以从这些候选波束测量结果中选择出Q个波束测量结果作为最终参与小区测量结果计算的目标波束测量结果。终端在进行选择的时候,可以从候选波束测量结果中进行随机选择,也可以按照信号参数测量值从高到低的顺序从候选波束测量结果中选择测量结果更优的作为目标波束测量结果。当然,本领域技术人员可以明白的是,当候选波束测量结果的数目大于Q时,终端从中选择Q个作为目标波束测量结果这只是本实施例的一种示例,在终端的其他一些示例当中,终端选择的目标波束测量结果的数目可以小于Q。
S412:终端直接将候选波束测量结果作为目标波束测量结果。
由于终端经过判断确定该小区当前的候选波束测量结果没有超过Q个,因此终端无需再对候选波束测量结果进行筛选,可以直接将这些波束测量结果作为目标波束测量结果,从而让这些候选波束测量结果均参与小区测量结果的计算。
S414:终端基于目标波束测量结果推导得到小区的小区测量结果。
在通过S406、S410或S412确定出小区的目标波束测量结果之后,终端可以根据各目标波束测量结果中的测量值进行均值计算,从而得到小区测量结果。
图5示出了一种终端对gNB下小区进行测量的模型示意图:在A—>A1中,终端根据RRC配置参数(RRC configure parameters)对小区的k个波束(gNB beam1,gNB beam2…gNB beam k)进行层1滤波(Layer 1 filtering)处理,分别得到这k个波束各自的波束测量结果。在A1到B之间,终端会对这k个波束的波束测量结果进行波束合并/选择(Beam Consolidation/Selection)处理,即根据信号参数的第一门限以及目标波束测量结果的最大数目Q选择出目标波束测量结果。在B中,终端可以根据选择出的目标波束测量结果计算出小区测量结果。然后在B之后,终端对小区测量结果进行层3滤波(Layer 3 filtering)处理,然后将经过层3滤波处理的小区测量结果发送给目标基站eNB。
S322:终端将小区测量结果发送给eNB。
当终端计算得到小区测量结果之后,将小区测量结果发送给eNB,以便eNB根据小区测量结果确定终端跨系统切换的必要性。
根据前面对IRAT Measurement Configuration的介绍可知,在本实施例的一些示例当中,IRAT Measurement Configuration中可以包括是否进行波束上报的指示以及波束上报的最大数目,所以,如果源基站gNB发送给目标基站eNB的IRAT Measurement Configuration中,指示要进行波束上报,且指定了上报数目x,则终端还需要从小区的波束测量结果中选择出测量值较优的x个波束测量结果,将这x个波束测量结果以及这x个波束测量结果对应的波束信息(SSB index)随着小区测量结果一同发送给目标基站eNB。
图5中,A1—>E的分支示出的终端进行波束上报的原理:在A1—>E之间,终端对gNB小区中k个波束测量结果进行层3滤波处理,然后,终端根据源基 站侧发送的相关波束上报指示信息从k个波束选择结果中选择出需要进行波束上报的,然后发送给目标基站eNB。
S324:eNB根据必要性评估信息确定终端本次跨系统切换的必要性。
eNB接收到终端发送的小区测量结果之后,根据IRAT Measurement Configuration中的必要性评估信息确定终端的跨系统切换是否必要。在本实施例中,IRAT Measurement Configuration中的必要性评估信息为信号参数的第二门限。终端在判断一个小区是否满足终端的服务需求时,需要保证小区测量结果中各信号参数的测量值均超过对应的第二门限。一旦小区测量结果中存在某一信号参数的测量值不满足对应第二门限的要求,eNB就会判定该小区测量结果对应的小区不满足终端的服务需求。而在判断终端的跨系统切换必要时,只要有源基站gNB侧有至少一个小区的小区测量结果表征对应的小区满足终端的服务需求,则eNB判断终端的跨系统切换为非必要切换。只有当gNB侧各小区均布满足终端的服务需求时,eNB才会判定终端的跨系统切换为必要切换。
由于必要性评估信息里可能的信号参数包括RSRP、RSRQ和SINR中的至少一个,所以,下面对目标基站进行切换必要性判断的过程进行简单说明:
如果IRAT Measurement Configuration只包含RSRP的第二门限,在测量时段内,有至少一个小区的小区测量结果中RSRP的测量值超过了RSRP的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration只包含RSRQ的第二门限,在测量时段内,有至少一个小区的小区测量结果中RSRQ的测量值超过了RSRQ的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration只包含SINR的第二门限,则eNB判断在测量时段内,有至少一个小区的小区测量结果中SINR的测量值超过了SINR的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration同时包含RSRP和RSRQ的第二门限,则eNB判断在测量时段内,有至少一个小区的小区测量结果中RSRP的测量值超过了RSRP的第二门限,且RSRQ的测量值超过了RSRQ的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration同时包含RSRP和SINR的第二门限,则eNB判断在测量时段内,有至少一个小区的小区测量结果中RSRP的测量值超过了RSRP的第二门限,且SINR的测量值超过了SINR的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration同时包含RSRQ和SINR的第二门限,则eNB判断在测量时段内,有至少一个小区的小区测量结果中RSRQ的测量值超过了RSRQ的第二门限,且SINR的测量值超过了SINR的第二门限,则目标侧eNB确定终端从gNB到本基站侧跨系统切换非必要。
如果IRAT Measurement Configuration同时包含RSRP、RSRQ和SINR的第二门限,则需要有至少一个小区的小区测量结果中,RSRP的测量值超过了RSRP 的第二门限,RSRQ的测量值超过了RSRQ的第二门限同时超过了RSRQ和SINR门限值,且SINR的测量值超过了SINR的第二门限,目标侧eNB才能确定终端从gNB到本基站侧跨系统切换非必要。
S326:eNB依次通过MME网元、AMF网元向gNB发送系统切换报告。
在本实施例中,无论eNB确定终端的跨系统切换是必要还是非必要,都依次通过MME网元、AMF网元向gNB发送系统切换报告。只不过在终端的跨系统切换为必要切换的情况下,系统切换报告不能表征终端的切换为非必要切换,而在终端的跨系统切换为必要切换的情况下,eNB向gNB发送的系统切换报告能够表征终端的切换为非必要切换。
在实施例一种已经介绍了系统切换报告中可以包括切换类型、切换问题、源基站侧服务小区标识(NR-CGI)、目标基站侧服务小区标识(ECGI)。在本实施例的情境中,切换类型是指“NG-RAN到EUTRAN的切换”。另外,在系统切换报告中还包括小区列表,小区列表中包括源基站gNB侧满足必要性评估信息中各指标要求的小区测量结果以及对应小区标识。同时小区列表中还可以包括终端向eNB上报的波束信息以及对应的波束测量结果。
源基站gNB接收到系统切换报告之后,若确定系统切换报告中的指示终端的切换为非必要切换,则可以进一步判断是否需要调整触发终端进行跨系统切换的信号参数切换门限,从而避免非必要切换的再次发生。这样,源基站可以调整/设置出适合的信号参数切换门限,从而让终端能够尽可能地驻留在NR系统中,以便NR系统为终端侧的用户提供优于EUTRA系统的通信服务,提升用户体验。
实施例三:
本实施例首先提供一种切换评估装置,用于实现前述实施例中切换评估方案中的切换评估过程;请参见图6示出的切换评估装置60的结构示意图。
切换评估装置60包括配置发送模块602、报告获取模块604,其中配置发送模块602用于将测量配置信息和必要性评估信息发送给目标基站;报告获取模块604用于获取目标基站根据小区测量结果和必要性评估信息生成的系统切换报告。
在本实施例中切换评估装置60可以部署在源基站上,该源基站可以是各种通信系统中的基站,例如5G通信系统中的gNB基站或者LTE系统中的eNB基站,又或者是3G或2G通信系统中的基站,甚至还可以是未来各种通信系统中的基站。配置发送模块602和报告获取模块604的功能可以通过源基站的处理器控制基站的通信装置实现。
源基站是指终端进行跨系统切换之前为终端提供服务的基站,而目标基站自然是在终端完成跨系统切换后为终端提供服务的基站。所谓跨系统切换,顾名思义是指终端从一种通信系统的基站切换到另一种通信系统的基站下。当然,跨系统切换可能是从使用通信技术较老的基站(以下简称“老基站”)切换到通信技术更新的基站(以下简称“新基站”),例如从4G通信系统中的eNB基站 切换到5G通信系统中的gNB基站;也可能是从新基站切换到老基站。例如终端从gNB基站切换到eNB基站或者2G、3G通信系统中的基站。可以理解的是,如果新基站提当前的覆盖情况满足终端的服务需求,则应当尽量让终端驻留在新基站下,由新基站为终端提供通信服务,这样有利于提升终端侧用户的通信体验。所以,在本实施例中,切换评估装置60需要了解终端跨系统切换必要性的情景是指终端从新基站切换到老基站下。对于终端从老基站到新基站的跨系统切换,切换评估装置60可以不必关心其必要性,因为这是有利于终端侧用户体验的。
测量配置信息用于指示终端对源基站侧的小区进行测量,并上报对小区测量得到的小区测量结果。所以,在测量配置信息中,至少存在用于向终端指示测量目标的信息,以及指示终端如何进行测量的测量策略信息。当目标基站获取到该测量配置信息之后,可以指示终端根据测量配置信息中的指示对源基站侧的小区进行测量。
必要性评估信息用于目标基站对终端上报的小区测量结果进行评判,从而确定终端从源基站到目标基站侧跨系统切换是否必要。可以理解的是,在必要性评估信息中,可以包括对终端跨系统切换是否必要进行评判的至少一个信号参数的指标,例如,这些指标可以是信号参数的第二门限。这里所谓的信号参数可以包括但不限于RSRP、RSRQ以及SINR中的至少一个。例如,当信号参数同时包括RSRP和SINR时,在必要性评估信息中可以同时包括RSRP的第二门限以及SINR的第二门限。
在本实施例中不具体限定配置发送模块602与目标基站之间的通信方式,任何可以让配置发送模块602将测量配置信息和必要性评估信息发送给目标基站的方式、途径都是可行的。
可以理解的是,切换评估系统中不仅可以包括前面提到的源基站、目标基站以及终端,还可以包括其他网络设备,例如在本实施例的一种示例当中,切换评估系统还包括源核心网设备和目标核心网设备,其中源核心网设备为源基站侧通信系统中的核心网设备,而目标核心网设备为目标基站侧通信系统中的核心网设备。例如,如果源基站为gNB,而目标基站为eNB,则源核心网可以为5G核心网,则目标核心网可以为4G核心网。
在本实施例的一些示例中,如图2所示,图2示出了一种切换评估系统2的示意图:切换评估系统2包括源基站21、目标基站24、终端25以及源核心网设备、目标核心网设备,其中源基站21为gNB,目标基站为eNB基站,对应地,源核心网设备为AMF网元22,而目标核心网设备为MME网元23。源基站21与AMF网元22可以通过NG接口进行通信,目标基站24与MME网元23之间可以通过S1接口进行通信,而AMF网元22和MME网元23之间可以通过N26接口交互。因此,在该示例当中,当切换评估装置60部署在源基站21上时,配置发送模块602可以先将测量配置信息和必要性评估信息通过NG接口发送给AMF网元22,然后由AMF网元22通过N26接口将这两个信息发送给MME网元23,随后MME网元23可以通过S1接口将这两个信息发送到 目标基站24上。
在本实施例中,当报告获取模块604接收到目标基站发送的系统切换报告之后,可以确定终端切换到目标基站的必要性。更进一步地,在本实施例一些示例当中,切换评估装置60还可以包括门限设置模块(图6中未示出),当切换评估装置60确定系统切换报告表征终端的切换为非必要切换的时候,可以确定源基站侧的信号参数切换门限可能设置得并不十分合理。当然,如果仅有某一个终端的跨系统切换时非必要切换,则可能是因为偶然因素引起的,但如果报告获取模块604接收到多个系统切换报告,且这多个系统切换报告均表征对应终端的切换为非必要切换,那么在这种情况下,可以确定源基站对信号参数的切换门限设置得确实不合理,因此,门限设置模块可以根据系统切换报告对信号参数的切换门限值进行调整。
下面介绍一种切换报告装置,用于实现前述实施例中切换评估方案中的切换报告过程,切换报告装置的结构示意图如图7所示。
切换报告装置70包括配置接收模块702、测量指示模块704、必要评估模块706以及切换报告模块708,其中配置接收模块702用于接收源基站发送的测量配置信息和必要性评估信息;测量指示模块704用于将测量配置信息发送给终端;必要评估模块706用于根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要;切换报告模块708用于在确定跨系统切换为非必要切换时生成系统切换报告并发送给源基站。
在本实施例中切换报告装置70可以部署在目标基站上,该目标基站可以是各种通信系统中的基站,例如5G通信系统中的gNB基站或者LTE系统中的eNB基站,又或者是3G或2G通信系统中的基站,甚至还可以是未来各种通信系统中的基站。配置接收模块702、测量指示模块704以及切换报告模块708的功能可以通过目标基站的处理器控制基站的通信装置实现。而必要评估模块706模块的功能则可以通过目标基站的处理器实现。
配置接收模块702接收到源基站发送的测量配置信息和必要性评估信息之后,测量指示模块704可以指示终端根据测量配置信息对源基站侧的小区进行测量。例如,在本实施例中,测量指示模块704可以将配置接收模块702接收到的测量配置信息发送给终端。
在本实施例的一些示例当中,源基站是在终端需要进行从本基站到目标基站的跨系统切换时,将测量配置信息和必要性评估信息携带在源基站到目标基站的透明容器消息中发送给切换报告装置70的配置接收模块702的,因此,在配置接收模块702通过源基站到目标基站的透明容器消息获取到测量配置信息和必要性评估信息后,切换报告装置70还需要向源基站侧进行反馈,让源基站指示即将进行跨系统切换但尚未完成切换的终端切换到目标基站下。
在终端根据测量配置信息完成对源基站侧小区的测量之后,必要评估模块706可以根据必要性评估信息和终端上报的小区测量结果确定终端从源基站到本基站的跨系统切换是否必要。
根据前面的介绍可知,在必要性评估信息可用于必要评估模块706对终端 反馈的小区测量结果进行评价。必要性评估信息中包括信号参数的第二门限,必要评估模块706可以确定小区测量结果中对应侧信号参数测量值是否超过它的第二门限。假定在必要性评估信息中包括信号参数A的第二门限和信号参数B的第二门限,则必要评估模块706需要评估小区测量结果中对信号参数A的测量值是否超过A的第二门限,以及小区测量结果中信号参数B的测量值是否超过必要性评估信息中B的第二门限。
可以理解的是,由于必要性评估信息来自于源基站侧,因此信号参数第二门限由源基站设置。源基站在设置信号参数的第二门限时,需要考虑能够为终端提供服务的信号参数的最低值。例如,假定信号参数为RSRP,则源基站需要考虑本基站为终端提供服务的时候,终端RSRP的最低值是多少,在设置RSRP的第二门限时,不能让第二门限低于该值,否则,当终端上报的小区测量结果中,小区的RSRP测量值高于其第二门限时,必要评估模块706依旧无法确定当前小区的RSRP是否满足提供服务的要求。所以,在本实施例中,一个信号参数的第二门限通常比为终端提供服务时该信号参数的最低值略高一点。
对于每一个小区而言,若小区测量结果中各信号参数的测量值均满足测量评估信息中对应的指标要求,则说明至少在终端进行测量的这一段时间内,该小区实际上是可以向终端提供满足其服务需求的信号覆盖的。在本实施例的一些示例当中,如果必要评估模块706确定在终端上报的M个小区测量结果中,有至少N个小区的测量结果都表征可以满足终端的服务需求,则必要评估模块706判断终端从源基站到本基站侧的跨系统切换没有必要,属于非必要切换。如果M个小区测量结果中满足必要性评估信息各指标要求的小区测量结果不足N个,则必要评估模块706可以判定终端从源基站到本基站侧的跨系统切换属于必要切换。N小于等于M。在本实施例的一个示例当中,N等于1,所以,只要必要评估模块706确定终端上报的各小区测量结果中,至少有一个小区测量结果中各信号参数的测量值均满足必要性评估信息中对应的指标要求,则必要评估模块706判定终端的跨系统切换属于非必要切换,因为如果终端继续驻留在源基站侧,至少可有该小区测量结果对应的小区可以满足终端的服务需求。但是如果目标基站确定终端上报的各小区测量结果中,都或多或少存在一些信号参数的测量值不满足必要性评估信息中对应的指标要求,则必要评估模块706确定终端的跨系统切换属于必要切换,因为在终端的这段测量时间中,源基站侧没有一个小区能够满足终端的服务需求,因此,如果终端继续驻留在源基站下,则源基站没办法向终端提供令用户满意的需求。
在必要评估模块706根据必要性评估信息和终端上报的小区测量结果确定出终端跨系统切换的必要性之后,如果切换报告模块708确定终端的跨系统切换为非必要切换,则生成系统切换报告发送给源基站,让源基站根据该系统切换报告了解到终端当前发生了非必要的系统切换,进而可以基于接收到的系统切换报告评估其对信号参数切换门限的设置是否合适。可以理解的是,由于该系统切换报告是切换报告模块708在确定终端发生了非必要切换时生成并发送给源基站的,因此,该系统切换报告应该包括能够表征终端的切换为非必要切 换的信息。
在本实施例的一些示例当中,无论终端的切换是否必要,切换报告模块708都可以生成系统切换报告,并发送给源基站。不过可以理解的是,针对终端发生非必要切换和必要切换着两种情景生成的切换报告是不同的,至少切换报告模块708在终端发生了必要的跨系统切换时生成的系统切换不能表征终端的跨系统切换不必要。在本实施例的一种示例当中,切换报告模块708生成的系统切换报告中,可以通过“切换问题”来表征终端跨系统切换的必要性:如果终端从源基站到目标基站的跨系统切换是非必要切换,则切换问题中携带的信息可以是能够表征切换为“非必要的系统间切换”的信息,否则,切换问题中携带的信息可能就是其他信息。例如,假定切换问题中的信息可以是“0”、“1”、“2”,其中“0”表征切换问题为非必要的系统切换,“1”表征终端的切换是因为第一问题,“2”表征终端的切换是因为第二问题,则当必要评估模块706确定终端的跨系统切换为非必要切换后,切换报告模块708生成的系统切换报告中,切换问题中携带的值应当是“0”。
在本实施例的其他一些示例当中,系统切换报告中除了表征终端跨系统切换必要性的信息,例如切换问题以外,还可以包括以下几种中的至少一种。
1)终端本次跨系统切换的切换类型。
2)源基站侧服务小区标识,源基站侧的服务小区为终端离开源基站,切换到目标基站侧前在源基站侧驻留的小区。
3)目标基站侧服务小区标识,目标基站侧的服务小区是指终端实现跨系统切换后,目标基站侧为终端提供服务的小区。
4)源基站侧满足必要性评估信息中各指标要求的小区测量结果以及对应小区标识。如果目标基站确定在源基站侧有K个小区的小区测量结果中各信号参数的测量值均大于必要性评估信息中对应信号参数的第二门限,则目标基站可以将这K个小区的小区标识以及这K个小区的小区测量结果携带在系统切换报告中一同发送给源基站。
5)波束信息和对应的波束测量结果。如果源基站配置的测量配置信息中包括“是否上报波束信息及其对应波束测量结果的指示”,且该指示指示终端需要上报波束信息以及波束对应的测量结果,则在系统切换报告中还包括终端上报的波束信息及对应的波束测量结果。如果测量配置信息中还进一步指示了上报波束信息及其对应波束测量结果的最大数目,则系统切换报告中携带的波束信息以及波束测量结果的数目符合最大数目的要求。
根据前述介绍可知,在一些切换评估系统当中,目标基站与源基站之间可以通过目标核心网设备、源核心网设备进行通信,所以,在本实施例的一种示例当中,切换报告模块708可以将系统切换报告先发送给目标核心网设备,然后由目标核心网设备将其通过源核心网设备发送给源基站。结合图2示出的切换评估系统2,当切换报告装置70设置在目标基站上时,切换报告模块708可以通过目标基站24先将系统切换报告通过S1接口发送给MME网元23,然后由MME网元23通过N26接口发送给AMF网元22,AMF网元22接收到来自 目标基站24的系统切换报告之后,将会把系统切换报告通过NG接口发送给源基站21。可以理解的是切换报告模块708与源基站之间的通信方式不限于本示例中介绍的这一种。
另外本实施例还提供一种切换检测装置,用于实现前述实施例中切换评估方案中的切换测量过程;请参见图8示出的切换检测装置80的结构示意图。
切换检测装置80包括配置获取模块802、小区测量模块804、测量报告模块806,其中配置获取模块802用于接收目标基站发送的来自源基站的测量配置信息;测量指示模块804用于根据测量配置信息对源基站侧的小区进行测量;必要评估模块806用于向目标基站上报小区测量结果。
在本实施例中切换检测装置80可以部署在终端上,该终端可以是支持当前任何一种通信系统的终端,也可以是支持未来某一种通信系统的终端。配置获取模块802、小区测量模块804、测量报告模块806的功能可以通过终端的处理器控制通信单元实现。
切换检测装置80的配置获取模块802在从目标基站处获取到测量配置信息之后,小区测量模块804可以根据测量配置信息对源基站侧的小区进行测量,然后由测量报告模块806基于小区向目标基站反馈测量结果,也即向目标基站发送小区测量结果。
在本实施例的一些示例当中,由于源基站是gNB,所以,小区测量模块804对源基站侧的小区进行测量实际是基于对小区中波束的测量进行的。在测量配置信息中,源基站会配置波束测量指示和小区测量策略,波束测量指示可以让小区测量模块804以波束为单位对源基站侧小区中的各波束进行测量。可以理解的是,在源基站下,有至少一个小区,源基站为每一个小区会配置至少一个波束。小区测量模块804根据波束测量指示能够得到的是小区中每个波束的测量结果,为了获得小区测量结果,小区测量模块804可以根据测量配置信息中的小区测量策略,基于对各波束的测量结果确定出对小区的测量结果。
假定目标基站是eNB,考虑到LTE系统中小区测量模块804对NR系统的测量只支持测量SSB,所以,在本实施例的一些示例中,物理层通过测量SSB来获得小区中多个波束的测量结果。在这种示例当中,波束测量指示可以包括源基站侧SSB的测量配置信息。除了源基站侧SSB测量配置信息以外,在波束测量指示中还包括源基站配置的测量时段、测量目标带宽、测量频点列表。其中测量时段用于指示小区测量模块804在哪一时间段中对源基站侧的小区进行测量。测量目标带宽和测量频点列表主要用于让小区测量模块804确定测量目标。
在本实施例的一些示例当中,小区测量策略会指示小区测量模块804基于小区中各波束的测量结果推导出针对小区的测量结果。不过在更多的示例当中,小区测量策略只会指示小区测量模块804从小区的各波束测量结果中选择出部分,作为推导小区测量结果的基础。小区测量策略中会指示小区测量模块804如何进行选择,以及选择多少波束测量结果。在这种方案当中,小区测量模块804在根据小区测量策略选择出参与确定小区测量结果的各波束测量结果后,根 据选择出的波束测量结果进行计算,得到小区测量结果,例如小区测量模块804对选择出的各波束测量结果求均值,计算得到小区测量结果。
小区测量模块804获取到针对源基站下各小区的小区测量结果之后,测量报告模块806将小区测量结果发送给目标基站,以便目标基站评判终端从源基站到目标基站的切换是否必要。
本实施例提供的切换评估装置、切换报告装置以及切换检测装置相互配合,可以在终端从源基站切换到目标基站下后,让源基站了解终端的本次跨系统切换是否为必要切换,进而反思本侧能够引起终端进行跨系统切换的信号参数切换门限是否设置合理。避免现有技术中因为源基站侧信号参数切换门限设置不合理导致终端总是进行非必要切换而源基站不自知的问题,所以本实施例中的切换评估方案实际上是针对源基站的一种反馈方式,让源基站在设置/调整信号参数切换门限的时候,可以考虑终端侧对当前信号参数切换门限的反馈情况,进而设置出更合理的切换门限,减少终端侧的无谓切换,提升终端侧用户体验。
实施例四:
本实施例提供一种存储介质,该存储介质中可以存储有一个或多个可供一个或多个处理器读取、编译并执行的计算机程序,在本实施例中,该存储介质可以存储切换评估程序、切换报告程序以及切换检测程序中的至少一个,其中切换评估程序可供一个或多个处理器执行实现前述实施例一或实施例二中介绍的任意一种切换评估方法中的步骤。切换报告程序可供一个或多个处理器执行实现前述实施例一或实施例二中介绍的任意一种切换报告方法中的步骤。切换检测程序可供一个或多个处理器执行实现前述实施例一或实施例二中介绍的任意一种切换检测方法中的步骤。
本实施例还提供一种基站,请参见图9示出的基站的硬件结构示意图:
基站90包括第一处理器91、第一存储器92以及用于连接第一处理器91与第一存储器92的第一通信总线93,其中第一存储器92可以为前述存储有第一上行传输程序的存储介质。第一处理器91可以读取第一存储器92中存储的切换评估程序,进行编译并执行实现实施例一至二中介绍的任意一种切换评估方法的步骤。或者第一存储器92可以为前述存储有切换报告程序的存储介质。第一处理器91可以读取第一存储器92中存储的切换报告程序,进行编译并执行实现实施例一至二中介绍的任意一种切换报告方法的步骤。
在本实施例中,如果第一存储器中存储有切换评估程序,则基站90可以为NG-RAN基站;如果第一存储器中存储有切换报告程序,则基站90可以为演进基站。
基站90实现实施例一至二中切换评估方法或切换报告方法的细节可以参见前述实施例的介绍,这里不再赘述。
终端10包括第二处理器101、第二存储器102以及用于连接第二处理器101与第二存储器102的第二通信总线103,其中第二存储器102可以为前述存储有切换检测程序的存储介质。第二处理器101可以读取第二存储器102中存储的 切换检测程序,进行编译并执行实现实施例一至二中介绍的任意一种切换检测方法的步骤。终端10实现实施例一至二中切换检测方法的细节可以参见前述实施例的介绍,这里不再赘述。
本实施例提供的基站、终端及存储介质,源基站通过向目标基站发送测量配置信息和必要性评估信息,让目标基站根据测量配置信息指示终端根据测量配置信息对源基站侧的小区进行测量,并向目标基站发送针对小区的小区测量结果。目标基站在接收到终端发送的小区测量结果后,可以根据小区测量结果以及源基站发送的必要性评估信息确定终端本次从源基站到目标系统的跨系统切换是否必要,提供了一种向源基站反馈终端跨系统切换必要性的途径,让源基站可以基于该反馈确定本侧信号参数切换门限设置的合理性,有利于对终端侧的通信效果、通信体验进行改善。
本领域技术人员应当明白的是,本申请各实施例中提供的切换评估、报告、检测方法、装置、基站、终端及存储介质,不仅可以应用于5G通信系统,也可以应用于未来任何一个通信系统中。
显然,本领域的技术人员应该明白,上述本发明实施例的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在计算机存储介质(只读内存/随机存取存储器(Read Only Memory/Random Access Memory,ROM/RAM)、磁碟、光盘)中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。所以,本申请不限制于任何特定的硬件和软件结合。
以上内容是结合具体的实施方式对本发明实施例所作的进一步详细说明,不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说,在不脱离本申请构思的前提下,还可以做出若干简单推演或替换,都应当视为属于本申请的保护范围。

Claims (15)

  1. 一种切换评估方法,包括:
    将测量配置信息和必要性评估信息发送给目标基站,所述测量配置信息用于所述目标基站指示终端对源基站侧的小区进行测量并上报小区测量结果;
    获取所述目标基站根据所述小区测量结果和所述必要性评估信息生成的系统切换报告,所述系统切换报告表征所述终端从本基站到所述目标基站的跨系统切换为非必要切换。
  2. 如权利要求1所述的切换评估方法,所述获取所述目标基站根据所述小区测量结果和所述必要性评估信息生成的系统切换报告之后,还包括:
    根据所述系统切换报告对能引起所述终端进行跨系统切换的信号参数切换门限进行调整。
  3. 如权利要求1或2所述的切换评估方法,其中,所述测量配置信息中包括波束测量指示和小区测量策略,所述波束测量指示用于指示所述终端对所述源基站侧小区的波束进行测量;所述小区测量策略用于指示所述终端根据对所述源基站侧小区波束的测量结果确定所述小区测量结果。
  4. 如权利要求3所述的切换评估方法,其中,所述波束测量指示包括以下几种信息中的至少一种:测量时段、测量目标带宽、测量频点列表,以及所述源基站侧同步信号/物理广播信道块SSB的测量配置信息。
  5. 如权利要求4所述的切换评估方法,所述波束测量指示还包括以下两项中的至少一项:是否上报波束信息及波束对应的波束测量结果的指示;上报波束信息及波束对应的波束测量结果的最大数目。
  6. 如权利要求3所述的切换评估方法,其中,所述小区测量策略用于指示所述终端根据信号参数的第一门限选择预设数目的波束测量结果,并根据选择出的所述波束测量结果推导所述小区测量结果。
  7. 一种切换报告方法,包括:
    接收源基站发送的测量配置信息和必要性评估信息;
    将所述测量配置信息发送给终端,所述测量配置信息用于指示所述终端对源基站侧的小区进行测量并上报小区测量结果;
    根据所述必要性评估信息和所述终端上报的小区测量结果确定所述终端从源基站到本基站的跨系统切换是否必要;
    在确定所述跨系统切换为非必要切换的情况下生成所述系统切换报告,并将所述系统切换报告发送给所述源基站。
  8. 如权利要求7所述的切换报告方法,其中,所述系统切换报告中包括切换问题,所述切换问题用于表征所述终端跨系统切换为非必要切换;所述系统切换报告还包括以下几种信息中的至少一种:所述终端本次跨系统切换的切换类型;所述源基站侧服务小区标识;所述目标基站侧服务小区标识;所述源基站侧满足所述必要性评估信息中各指标要求的小区测量结果以及对应小区标识。
  9. 如权利要求8所述的切换报告方法,所述系统切换报告中还包括:终端上报的小区波束信息和波束对应的波束测量结果。
  10. 如权利要求7所述的切换报告方法,其中,所述根据所述必要性评估 信息和所述终端上报的小区测量结果确定所述终端从源基站到本基站的跨系统切换是否必要包括:
    在确定所述终端上报的至少一个所述小区测量结果中多个信号参数的测量值均满足所述必要性评估信息中对应的指标要求的情况下,确定所述终端的所述跨系统切换为非必要切换;
    在确定所述终端上报的至少一个所述小区测量结果中均存在至少一个信号参数的测量值不满足所述必要性评估信息中对应的指标要求的情况下,确定所述终端的所述跨系统切换为必要切换。
  11. 如权利要求7-10任一项所述的切换报告方法,其中,所述测量配置信息中包括波束测量指示和小区测量策略,所述波束测量指示用于指示所述终端对所述源基站侧小区的波束进行测量;所述小区测量策略用于指示所述终端根据对所述源基站侧小区波束的测量结果确定所述小区测量结果。
  12. 一种切换评估装置,包括:
    配置发送模块,设置为将测量配置信息和必要性评估信息发送给目标基站,所述测量配置信息用于所述目标基站指示终端对源基站侧的小区进行测量并上报小区测量结果;
    报告获取模块,设置为获取所述目标基站根据所述小区测量结果和所述必要性评估信息生成的系统切换报告,所述系统切换报告表征所述终端从本基站到所述目标基站的跨系统切换为非必要切换。
  13. 一种切换报告装置,包括:
    配置接收模块,设置为接收源基站发送的测量配置信息和必要性评估信息;
    测量指示模块,设置为将所述测量配置信息发送给终端,所述测量配置信息用于指示所述终端对源基站侧的小区进行测量并上报小区测量结果;
    必要评估模块,设置为根据所述必要性评估信息和所述终端上报的小区测量结果确定所述终端从源基站到本基站的跨系统切换是否必要;
    切换报告模块,设置为在确定所述跨系统切换为非必要切换的情况下生成所述系统切换报告,并将所述系统切换报告发送给所述源基站。
  14. 一种基站,包括处理器、存储器及通信总线;
    所述通信总线设置为实现处理器和存储器之间的连接通信;
    所述处理器设置为执行存储器中存储的切换评估程序,以实现如权利要求1至6中任一项所述的切换评估方法;或,所述处理器设置为执行存储器中存储的切换报告程序,以实现如权利要求7至11中任一项所述的切换报告方法。
  15. 如权利要求14所述的基站,其中,在所述存储器中存储有切换评估程序的情况下,所述基站为NG-RAN基站;在所述存储器中存储有切换报告程序的情况下,所述基站为演进基站。
PCT/CN2019/091725 2018-06-22 2019-06-18 一种切换评估、报告方法、装置及基站 Ceased WO2019242608A1 (zh)

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