WO2014032557A1 - 一种小区切换的判断方法及基站 - Google Patents

一种小区切换的判断方法及基站 Download PDF

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Publication number
WO2014032557A1
WO2014032557A1 PCT/CN2013/082293 CN2013082293W WO2014032557A1 WO 2014032557 A1 WO2014032557 A1 WO 2014032557A1 CN 2013082293 W CN2013082293 W CN 2013082293W WO 2014032557 A1 WO2014032557 A1 WO 2014032557A1
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WO
WIPO (PCT)
Prior art keywords
handover
base station
reference value
cell
source
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PCT/CN2013/082293
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English (en)
French (fr)
Inventor
季莉
汤斌淞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13832754.9A priority Critical patent/EP2876936B1/en
Publication of WO2014032557A1 publication Critical patent/WO2014032557A1/zh
Priority to US14/626,432 priority patent/US9560570B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination 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
    • H04W36/005Control or signalling for completing the hand-off involving radio access media independent information, e.g. MIH [Media independent Hand-off]
    • 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
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • 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 invention belongs to the field of communications, and in particular, to a method for determining cell handover and a base station. Background technique
  • the handover procedure in the Long Term Evolution (LTE) system is a network-side triggering, user equipment (UE)-assisted hard handover.
  • the UE performs signal measurement according to the measurement information configured on the network side, and the network side performs handover decision.
  • the LTE system does not need any system network manager, and the handover decision is located at the base station, and the evolved Node B (eNB) where the source cell is located configures the UE, so that the UE can serve the cell and The signal quality of the neighboring cell is measured, and the UE is required to report the measurement result of the neighboring cell signal quality to the source eNB when the signal quality of the neighboring cell meets the handover condition.
  • the source eNB selects an appropriate target cell to initiate handover according to the measurement result reported by the UE.
  • the source eNB switches the UE to the target cell of the target eNB according to the measurement result of the target cell reported by the UE (here assumed to be the signal quality 1), and the handover policy of the target eNB of the target cell may be different from the source eNB, so the eNB of the target cell It is possible that the UE is switched back to the source cell because the measurement result of the source cell reported by the UE (assumed to be the signal quality 2). At this time, the source eNB of the source cell switches the UE back to the target cell, thus causing the source cell and the target cell. Switch between PingPong and back and forth. Summary of the invention
  • An object of the present invention is to provide a method for determining cell handover, which aims to solve the prior art.
  • a specific implementation manner of the present invention provides a method for determining a cell handover, where the method includes:
  • the related information of the handover UE includes: a handover reason reference value of the handover UE in a source cell.
  • the related information about receiving the handover UE includes:
  • the handover cause reference value includes: at least one of an uplink interference plus noise ratio SINR of the UE in the source cell, a block error rate BLER of the uplink control physical channel UL PUCCH, and a BLER of the uplink shared physical channel UL PUSCH. .
  • the handover cause reference value includes: at least one of a downlink SINR of the source cell, a BLER of a downlink control physical channel DL PDCCH, a BLER of a downlink shared physical channel DL PDSCH, and a downlink channel quality indicator CQI feedback. .
  • the handover cause reference value includes: at least one of a resource block RB occupancy rate of the source base station and a UE transmission rate of the source base station at a unit RB occupancy rate.
  • the handover cause reference value includes a change value of the cell region extension offset value CRE bias.
  • the handover reason reference value includes: a throughput rate of the source cell where the handover UE is located before the handover.
  • the present invention further provides an evolved base station, where the base station includes: a receiving unit, configured to receive related information of the handover user equipment UE, and transmit related information of the handover UE to the determining unit;
  • the determining unit is configured to determine, according to the related information of the handover UE, whether to switch the handover UE back to a source cell under the source base station;
  • the related information of the handover UE includes: a handover reason reference value of the UE in the source cell.
  • the handover cause reference value includes: at least one of an uplink interference plus noise ratio SINR of the UE in the source cell, a block error rate BLER of the uplink control physical channel UL PUCCH, and a BLER of the uplink shared physical channel UL PUSCH. .
  • the handover cause reference value includes: at least one of a downlink SINR of the source cell, a BLER of a downlink control physical channel DL PDCCH, a BLER of a downlink shared physical channel DL PDSCH, and a downlink channel quality indicator CQI feedback. .
  • the handover cause reference value includes: at least one of a resource block RB occupancy rate of the source base station and a UE transmission rate of the source base station at a unit RB occupancy rate.
  • the handover cause reference value includes a change value of the cell area extension offset value CRE bias.
  • the handover cause reference value includes: a throughput rate of the source cell where the handover UE is located before the handover.
  • the present invention further provides a method for cell handover determination, the method includes: the handover user terminal UE receives related information of the handover UE sent by the source base station, where the related information of the handover UE includes the handover UE The handover cause reference value of the source cell; the handover UE sends the related information of the handover UE to the target base station, so that the target base station determines whether to switch the handover UE back according to the related information of the handover UE.
  • Source cell under the source base station.
  • the present invention provides a user terminal, including:
  • a receiving unit configured to receive, by the source base station, related information of the handover UE, where the related information of the handover UE includes a handover reason reference value of the handover UE in the source cell.
  • a sending unit configured to send the related information of the handover UE to the target base station, so that the target base station determines, according to the related information of the handover UE, whether to switch the handover UE back to the source cell under the source base station.
  • the technical solution provided by the specific embodiment of the present invention is to switch from the target cell under the target base station to the source cell of the source base station, it is necessary to consider the related information of the handover UE, and determine whether the UE uses the handover reference value of the source cell in the relevant information.
  • the source cell is used as the target cell for the next handover.
  • the method provided by the embodiment of the present invention considers the handover reference value of the UE in the source cell in the next handover, and does not regard the source cell as the UE when the handover reference value is poor.
  • the target cell of the secondary handover so it can avoid the PingPong handover between the cell and the target cell.
  • FIG. 1 is a schematic flowchart of a cell handover determination method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a technical scenario provided by an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a cell handover determination method according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart diagram of a cell handover determination method according to another embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of a method for determining handover of a cell according to another embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of a method for determining handover of a cell according to a second embodiment of the present invention.
  • FIG. 7 is a schematic flow chart of a cell handover determining method according to a next embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a cell handover determining method according to a next embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method for determining handover of a cell according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of an evolved base station according to an embodiment of the present invention. detailed description
  • a specific embodiment of the present invention provides a cell handover determination method, which may be performed by an eNB of a target cell, that is, a target base station, and the method is as shown in FIG.
  • the related information of the handover UE may be sent by the source base station to the target base station through the X2 interface, or may be sent by the source base station to the handover UE, and then sent by the handover UE to the target base station through the air interface.
  • the method provided by the specific embodiment of the present invention needs to consider the related information of the handover UE when the UE is switched back to the source base station, and determines whether the source cell is used as the next handover according to the handover reference value of the source cell in the related information.
  • Target cell The method provided by the specific embodiment of the present invention considers the handover reference value of the UE in the source cell in the next handover, and does not regard the source cell as the target cell of the UE in the next handover when the handover reference value is poor, so it can avoid the cell. PingPong switch back and forth with the target cell.
  • the related information of the handover UE includes: a handover reason reference value of the UE in the source cell.
  • the handover cause reference value may be: an uplink signal quality value (for example, a Signal to Interference plus Noise Ratio (SINR) or a Block Error Ratio (BLER).
  • SINR Signal to Interference plus Noise Ratio
  • BLER Block Error Ratio
  • the handover cause reference value may be: a downlink signal quality value (for example, a downlink SINR or a channel quality indicator (CQI)).
  • the method for implementing Sl l can be specifically:
  • the method for implementing S12 may specifically include:
  • the target base station compares the handover cause reference value of the handover UE with the source cell and the handover cause reference value of the UE in the target cell, and when the handover cause reference value of the UE in the source cell is worse than the handover cause reference value of the UE in the target cell, the target base station does not The source cell is used as the next handover target cell of the UE.
  • the specific situation that the UE's handover cause reference value in the source cell is different from the UE's handover cause reference value may be different due to the difference of the handover cause reference value.
  • the handover cause reference value is the uplink SINR
  • the UE's SINR value of the source cell is smaller than the UE's SINR value of the target cell, and the UE's handover cause reference value in the source cell is worse than the UE's handover cause reference value in the target cell.
  • the handover cause reference value is the uplink BLER
  • the BLER value of the source cell is larger than the BLER value of the UE in the target cell
  • the handover cause reference value of the UE in the source cell is worse than the handover cause reference value of the UE in the target cell.
  • the present invention provides an embodiment.
  • This embodiment provides a method for determining handover of a cell, which is completed between the base station 1 and the base station 2.
  • base station 1 is used as a source base station, and its corresponding cell is cell 1
  • base station 2 is a target base station, and its corresponding cell is cell 2, and cell 1 and cell 2 are adjacent.
  • the handover direction of this embodiment may be: Cell 1 switches to cell 2.
  • This embodiment can be forwarded through the air interface, that is, the base station 1 forwards the handover reason and related information to the base station 2 through the air interface.
  • the scenario implemented in the following embodiments may also be forwarded by using air interface forwarding.
  • the switching cause of the present embodiment is an example of the signal quality of the uplink, wherein the parameter of the uplink signal quality selects the SINR.
  • other parameters may also be selected, for example, BLER, BLER of Uplink Physical Uplink Control Channel (UL PUCCH), Uplink Physical Uplink shared channel (UL PUSCH) Any combination of BLER and the like.
  • BLER BLER
  • UL PUCCH Uplink Physical Uplink Control Channel
  • UL PUSCH Uplink Physical Uplink shared channel
  • the method is shown in Figure 3 and includes: S31, when the base station 1 detects that the uplink SINR of the UE is poor (for example, does not meet the preset threshold), the base station 1 decides to switch the UE to the base station 2;
  • the base station 1 sends the uplink SINR information of the UE in the cell 1 to the base station 2;
  • the base station 1 may also send a handover reason to the base station 2, and the handover cause may be expressed as "poor SINR is poor".
  • the base station 2 receives the uplink SINR information of the UE in the cell 1.
  • the base station 2 also receives the handover reason for the UE to handover to the cell 2.
  • the base station 2 compares the uplink SINR of the UE in the cell 1 with the SINR of the UE in the cell 2. When the comparison result is less than, the cell 1 is not used as the target cell of the next handover of the UE.
  • the trigger condition for the base station 1 to decide to handover the UE to the base station 2 may have other conditions in addition to the poor uplink SINR of the UE of the S31.
  • the UE is at the boundary of the cell 1, and the SINR is degraded or the BLER is increased due to the cell 1 interference environment.
  • the resource block (RB) resource coordination (for example, from RBI scheduling to RB2) cannot eliminate interference.
  • the base station 1 will decide to handover the UE to the base station 2.
  • the UE uses carrier2 as the traffic channel, and the SINR is deteriorated or the BLER is increased due to the deterioration of the interference environment in carrierl.
  • the base station can be changed according to the PCell, so that the PCell of the UE is changed from Carrier1 to Carrier2, that is, handover.
  • the HO of this transform carrier in the CA may be the same as the base station, but it may also be a different base station in the CoMP scenario.
  • a specific embodiment of the present invention provides a further embodiment.
  • the embodiment provides a handover determination method for a cell, and the method is as shown in FIG. 4 .
  • the difference between the embodiment and the embodiment shown in FIG. 3 is that the reason for the handover in this embodiment may be: the switching of the downlink signal quality, and the related information may be: the downlink SINR of the UE, the CQI, and of course, in practical applications, the foregoing
  • the related information may further include: a downlink downlink control channel (PDCCH), a BLER of a downlink DL shared physical channel (PDSCH), a CQI feedback of the UE, and the like.
  • PDCCH downlink downlink control channel
  • PDSCH downlink DL shared physical channel
  • CQI feedback of the UE and the like.
  • Case 2 Under carrier aggregation or coordinated multi-point transmission/reception (CoMP), the cell of one station will contain cells celL of different frequencies, such as celll of Carrier 1 and cell2 of Carrier2.
  • Cell of 1 is a PCell, and Carrierl is subjected to a high degree of interference, and the signal quality is poor.
  • the base station will perform Pcell switching, and the Pcell is changed from cell1 to cell 2.
  • the PCell is switched. This will be consistent with the switching that should be caused by the deterioration of the DL signal quality.
  • the switching reason reference value may be: frequency information of the switching UE and uplink signal quality of the terminal at the frequency layer.
  • a specific embodiment of the present invention provides another embodiment.
  • This embodiment provides a handover determination method for a cell, and the method is as shown in FIG. 5.
  • the difference between the embodiment and the embodiment shown in FIG. 3 is that the reason for the handover may be: the handover of the UE throughput, and the handover cause reference value may be: the RB occupancy rate or the UE transmission rate in the unit RB occupancy rate, where Figure 5 shows an example of the RB occupancy rate.
  • Case 1 Switching based on the amount of UE radio resources (restricted resources).
  • UE radio resources restricted resources.
  • the base station switches the UE to a cell capable of providing more RB resources.
  • the handover cause reference value may be the occupancy rate of the UE resource, that is, the RB occupancy rate or the resource utilization rate.
  • Case 2 Based on the UE radio resource usage (channel environment limited) handover, in a certain channel environment, the UE can provide different transmission rates with RB resources. For example, if the channel conditions are good, a higher order modulation solution can be used. Adjusting, for example, high-order modulation and demodulation with 16QAM or 64QAM, and in the case of poor channel conditions (such as interference or space barriers, etc.), the same RB resources can be used to provide the UE's transmission rate. Lower, for example, only low modulation and demodulation such as QPSK can be used. In this case, the base station needs to switch the UE to the neighbor cell.
  • the handover reason reference value of this handover may be the UE transmission rate under the unit RB occupancy rate.
  • the embodiment of the present invention further provides the following embodiment.
  • the embodiment provides a cell handover determination method, and the method is shown in FIG. 6.
  • the difference between the embodiment and the embodiment shown in FIG. 3 is that the reason for the handover may be: a UE-based Subscriber Profile Identifier (SPID) handover, and the handover cause reference value may be: a downlink signal quality of the UE, For example, the SINR of the UE downlink, and the like.
  • SPID Subscriber Profile Identifier
  • the embodiment of the present invention further provides a next embodiment.
  • This embodiment provides a method for determining a cell handover, and the method is as shown in FIG. 7.
  • the difference between the embodiment and the embodiment shown in FIG. 3 is that the handover reason may be: IC-based handover, and the handover cause reference value may be: SINR of DL traffic channel PDSCH, BLER of DL PDSCH, CQI feedback of UE, etc. Wait.
  • the embodiment of the present invention further provides a next embodiment.
  • a cell handover determination method is provided in a hybrid networking scenario.
  • the method is as shown in FIG. 8.
  • the reason for the handover may be: load-based handover
  • the handover reference value may be: RB occupancy rate and the like.
  • the reason for the handover may be: CRE switching
  • the corresponding switching reason reference value may be: CRE bias changing value.
  • the embodiment of the present invention further provides another embodiment.
  • a cell handover determination method is provided in a coordinated multi-point transmission/reception (CPM) scenario, and the method is as shown in FIG. Show.
  • CCM coordinated multi-point transmission/reception
  • the difference between the embodiment and the embodiment shown in FIG. 3 is that the reason for the handover may be: the handover caused by the reassignment of the control channel, and the handover reason reference may be: the UE throughput rate before the handover.
  • the embodiment of the present invention further provides an evolved base station.
  • the base station includes:
  • the receiving unit 101 is configured to receive related information of the handover user equipment UE, and transmit related information of the handover UE to the determining unit 22;
  • the determining unit 102 is configured to determine, according to the related information of the handover UE, whether to switch the handover UE back to the source cell under the source base station, and the related information of the handover UE includes: the handover UE The reason for the switching cause in the source cell.
  • the information about the handover UE received by the receiving unit 101 may be sent by the source base station to the receiving unit 101 through the X2 interface, or may be sent by the source base station to the handover UE, and then sent by the handover UE to the receiving unit 101 through the air interface.
  • the base station provided by the present invention needs to consider the related information of the handover UE when switching from the target base station to the source base station, and determines whether the source cell is the target cell for the next handover according to the handover reference value of the source cell in the relevant information.
  • the method provided by the specific embodiment of the present invention considers the handover cause reference value of the UE in the source cell in the next handover, and does not regard the source cell as the target cell of the UE in the next handover when the handover cause reference value is poor, so Avoid PingPong switching between the cell and the target cell.
  • the foregoing switching cause reference value may include:
  • the UE has at least one of an uplink interference plus noise ratio SINR of the source cell, a block error rate BLER of the uplink control physical channel UL PUCCH, and a BLER of the uplink shared physical channel UL PUSCH.
  • the foregoing handover cause reference value may include: a downlink SINR of the UE in the source cell, a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least a downlink CQI feedback of the UE in the source cell.
  • a downlink SINR of the UE in the source cell a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least a downlink CQI feedback of the UE in the source cell.
  • the foregoing handover cause reference value may include: at least one of a resource block RB occupancy rate of the source base station and a UE transmission rate of the source base station at a unit RB occupancy rate.
  • the foregoing switching cause reference value may include: a change value of CRE bias.
  • the foregoing handover cause reference value may include: a throughput rate of the source cell where the handover UE is located before the handover.
  • the determining unit 102 is specifically configured to:
  • the embodiment of the present invention further provides an evolved base station, where the base station includes:
  • the receiver 201 is configured to receive related information of the handover user equipment UE, and transmit related information of the UE to the processor.
  • the processor 202 is configured to determine, according to the related information of the handover UE, whether to switch the UE back to the source base station, and the related information of the handover UE includes: a handover reason reference value of the UE in the source cell.
  • the related information of the handover UE received by the receiver 201 may be sent by the source base station to the receiver 201 through the X2 interface, or may be sent by the source base station to the handover UE, and then sent by the handover UE to the receiver 201 through the air interface.
  • the base station provided by the present invention needs to consider the related information of the handover UE when switching from the target base station to the source base station, and determines whether the source cell is the target cell for the next handover according to the handover cause reference value of the source cell in the relevant information.
  • the method provided by the specific embodiment of the present invention considers the handover reference value of the UE in the source cell in the next handover, and does not regard the source cell as the target cell of the UE in the next handover when the handover reference value is poor, so it can avoid PingPong switching back and forth between the source cell and the target cell.
  • the foregoing switching cause reference value may include:
  • the UE has at least one of an uplink interference plus noise ratio SINR of the source cell, a block error rate BLER of the uplink control physical channel UL PUCCH, and a BLER of the uplink shared physical channel UL PUSCH.
  • the foregoing handover cause reference value may include: a downlink SINR of the UE in the source cell, a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least a downlink CQI feedback of the UE in the source cell.
  • a downlink SINR of the UE in the source cell a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least a downlink CQI feedback of the UE in the source cell.
  • the foregoing handover cause reference value may include: at least one of a resource block RB occupancy rate of the source base station and a UE transmission rate of the source base station at a unit RB occupancy rate.
  • the foregoing switching cause reference value may include: a change value of CRE bias.
  • the foregoing handover cause reference value may include: a throughput rate of a source cell where the UE is located before the handover.
  • the processor 202 is specifically configured to:
  • the handover cause reference value is greater than the UE in the target cell.
  • the source cell is not used as the next handover target cell of the UE.
  • the user terminal includes:
  • the information receiving unit 301 is configured to receive related information of the user terminal that is sent by the source base station, and related information of the user terminal, where the related information of the user terminal includes a reference value of the handover reason of the user terminal in the source cell. .
  • the information sending unit 302 is configured to send the related information of the user terminal to the target base station, so that the target base station determines, according to the related information of the user terminal, whether to switch the user terminal back to the source cell under the source base station.
  • the foregoing reference reasons for switching include:
  • the UE has at least one of an uplink interference plus noise ratio SINR of the source cell, a block error rate BLER of the uplink control physical channel UL PUCCH, and a BLER of the uplink shared physical channel UL PUSCH.
  • the foregoing handover cause reference value includes: a downlink SINR of the UE in the source cell, a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least one of the downlink CQI feedback of the UE in the source cell.
  • a downlink SINR of the UE in the source cell a BLER of the downlink control physical channel DL PDCCH, a BLER of the downlink shared physical channel DL PDSCH, and at least one of the downlink CQI feedback of the UE in the source cell.
  • the foregoing handover cause reference value includes: at least one of a resource block RB occupancy rate of the source base station and a UE transmission rate of the source base station at a unit RB occupancy rate.
  • the foregoing switching cause reference value includes: a change value of CRE bias.
  • the foregoing handover cause reference value includes: a throughput rate of a source cell where the UE is located before the handover.
  • the target base station may obtain the handover cause reference value of the user terminal at the source base station, and determine whether the source cell is the target cell for the next handover according to the handover cause reference value.
  • the technical solution provided by the specific embodiment of the present invention considers the handover reference value of the UE in the source cell in the next handover, and does not regard the source cell as the target cell of the UE in the next handover when the handover reference value is poor, so it can be avoided. PingPong switching back and forth between the source cell and the target cell.

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Abstract

本发明适用于通信领域,具体提供了一种小区切换的判断方法,所述方法包括:接收在发起切换操作时源基站发送的切换UE的相关信息;根据所述切换UE的相关信息判断是否将所述切换UE切换回源基站下的源小区;所述UE切换的相关信息至少包括:UE在所述源小区的切换原因参考值,本发明提供的技术方案具有避免源基站下的源小区与目标基站下的目标小区之间来回的PingPong切换的优点。

Description

一种小区切换的判断方法及基站 本申请要求了 2012年 8月 27日提交的, 申请号为 201210307640.8, 发明名称为 《一种小区切换的判断方法及基站》 的中国申请的优先权, 其 全部内容通过引用结合在本申请中。
技术领域
本发明属于通信领域, 尤其涉及一种小区切换的判断方法及基站。 背景技术
长期演进( Long Term Evolution , LTE ) 的系统中的切换流程是网络 侧触发, 用户设备(UE )协助的硬切换。 UE根据网络侧配置的测量信息进 行信号测量, 网络侧进行切换决策。 与传统的蜂窝网络系统相比, LTE系统 不需要任何系统网络管理器, 切换决策位于基站, 源小区所在的源演进型 基站( evolved Node B , eNB )配置 UE, 使 UE可以对其服务小区以及邻小 区信号质量进行测量, 并要求 UE在邻小区信号质量满足切换条件时将邻小 区信号质量的测量结果上报给源 eNB, 该源 eNB根据 UE上报的测量结果选 择合适的目标小区发起切换。
在实现现有技术的过程中, 发明人发现现有技术存在如下问题: 由于现有技术中不同基站釆用的切换策略不同, 导致源基站下的源小 区与目标基站下的目标小区之间来回的乒乓( PingPong )切换。 例如源 eNB 根据 UE上报的目标小区的测量结果(这里假设为信号质量 1 )将 UE切换到 目标 eNB的目标小区, 目标小区的目标 eNB的切换策略有可能与源 eNB不 同, 所以目标小区的 eNB有可能因为 UE上报的源小区的测量结果(假设为 信号质量 2 )将 UE切换回源小区, 此时源小区的源 eNB又会将 UE重新切换 回目标小区, 这样就导致源小区与目标小区之间来回的 PingPong切换。 发明内容
本发明的目的在于提供一种小区切换的判断方法, 旨在解决现有技术 的源小区与目标小区之间来回的 PingPong切换的问题。 一方面, 本发明具体实施方式提供一种小区切换的判断方法, 所述方 法包括:
接收切换用户设备 UE的相关信息;
根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基站下 的源小区;
所述切换 UE的相关信息包括:所述切换 UE在源小区的切换原因参考 值。
可选的, 所述接收切换 UE的相关信息包括:
接收发起切换的源基站发送的所述切换 UE的相关信息; 或者, 接收所述切换 UE转发的源基站在发起切换操作时发送的切换 UE的相 关信息。
可选的,所述切换原因参考值包括: 所述 UE在源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种。
可选的, 所述切换原因参考值包括: 所述 UE在源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 下行信道质量指示 CQI反馈的至少一种。
可选的, 所述切换原因参考值包括: 源基站的资源块 RB占用率、 源基 站在单位 RB占用率下的 UE传输速率的至少一种。
可选的, 当混合组网场景下, 所述切换原因参考值包括小区区域扩展 偏置值 CRE bias的改变值。
可选的,所述切换原因参考值包括:切换前的所述切换 UE所在源小区 的吞吐率。
另一方面, 本发明还提供一种演进型基站, 所述基站包括: 接收单元, 用于接收切换用户设备 UE的相关信息, 将所述切换 UE的 相关信息传递给判断单元;
所述判断单元,用于根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基站下的源小区;
所述切换 UE的相关信息包括: 所述 UE在源小区的切换原因参考值。 可选的,所述切换原因参考值包括: 所述 UE在源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种。
可选的, 所述切换原因参考值包括: 所述 UE在源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 下行信道质量指示 CQI反馈的至少一种。
可选的, 所述切换原因参考值包括: 源基站的资源块 RB占用率、 源基 站在单位 RB占用率下的 UE传输速率的至少一种。
可选的, 所述切换原因参考值包括小区区域扩展偏置值 CRE bias的改 变值。
可选的,所述切换原因参考值包括: 切换前的所述切换 UE所在源小区 的吞吐率。
另一方面, 本发明还提供一种小区切换判断的方法, 该方法包括: 切换用户终端 UE接收源基站发送的所述切换 UE的相关信息,所述切 换 UE的相关信息包括所述切换 UE在所述源小区的切换原因参考值; 所述切换 UE将所述切换 UE的相关信息发送给目标基站,以使得所述 目标基站根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基 站下的源小区。
另一方面, 本发明还提供一种用户终端, 包括:
接收单元,用于接收源基站发送的所述切换 UE的相关信息,所述切换 UE的相关信息包括所述切换 UE在所述源小区的切换原因参考值。 发送单元,用于将所述切换 UE的相关信息发送给目标基站, 以使得所 述目标基站根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源 基站下的源小区。
本发明具体实施方式提供的技术方案在从目标基站下的目标小区切换 回源基站的源小区时,需要考虑切换 UE的相关信息,根据该相关信息内的 UE在源小区的切换参考值确定是否将源小区作为下次切换的目标小区, 由 于本发明具体实施方式提供的方法在下次切换时考虑了 UE在源小区的切 换参考值,并在切换参考值较差时不将源小区作为 UE在下次切换的目标小 区, 所以其能避免小区与目标小区之间来回的 PingPong切换。
附图说明
图 1是本发明实施例提供的一种小区的切换判断方法的流程示意图; 图 2是本发明一实施例提供的技术场景示意图;
图 3是本发明一实施例提供的一种小区的切换判断方法的流程示意图; 图 4是本发明又一实施例提供的一种小区的切换判断方法的流程示意 图;
图 5是本发明另一实施例提供的一种小区的切换判断方法的流程示意 图;
图 6为本发明后一实施例提供的一种小区的切换判断方法的流程示意 图;
图 7 为本发明还提供的下一实施例的小区的切换判断方法的流程示意 图;
图 8为本发明还提供的下一个实施例的小区的切换判断方法的流程示 意图;
图 9为本发明另外提供的实施例的小区的切换判断方法的流程示意图; 以及
图 10为本发明具体实施方式提供的一种演进型基站的结构示意图。 具体实施方式
为了使本发明的目的、 技术方案及有益效果更加清楚明白, 以下结合 附图及实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的 具体实施例仅仅用以解释本发明, 并不用于限定本发明。
本发明具体实施方式提供一种小区的切换判断方法, 该方法可以由目 标小区的 eNB即目标基站执行, 该方法如图 1所示, 包括:
511、 接收切换 UE的相关信息。
本步骤中, 切换 UE的相关信息可以由源基站通过 X2接口发送给目标 基站; 也可以由源基站发送给切换 UE, 再由该切换 UE通过空口发送给目 标基站。
512、 根据该切换 UE的相关信息判断是否将 UE切换回源基站下的源 小区。
本发明具体实施方式提供的方法在从目标基站切换回源基站时, 需要 考虑切换 UE的相关信息,根据该相关信息内的 UE在源小区的切换参考值 确定是否将源小区作为下次切换的目标小区。 由于本发明具体实施方式提 供的方法在下次切换时考虑了 UE在源小区的切换参考值,并在切换参考值 较差时不将源小区作为 UE在下次切换的目标小区,所以其能避免小区与目 标小区之间来回的 PingPong切换。
上述切换 UE的相关信息包括: UE在源小区的切换原因参考值。 例如 切换原因为 UE上行信号质量差, 则切换原因参考值可以为: 上行信号质量 值 (例如上行干扰力口噪声比 ( Signal to Interference plus Noise Ratio, SINR ) 或误块率(Block Error Ratio, BLER ) ) , 如切换原因为 UE下行信号质量 差, 则切换原因参考值可以为: 下行信号质量值(例如下行 SINR或信道质 量指示 ( channel quality indicator, CQI ) ) 。
实现 Sl l的方法具体可以为:
接收切换 UE转发的源基站在发起切换操作时发送的切换 UE的相关信 息
或接收源基站在发起切换操作时发送的切换 UE的相关信息。
实现 S12的方法具体可以包括:
目标基站比较切换 UE在源小区的切换原因参考值与 UE在目标小区的 切换原因参考值, 当 UE在源小区的切换原因参考值比 UE在目标小区的切 换原因参考值差时, 目标基站不将源小区作为该 UE的下次切换目标小区。
需要说明的是,上述 UE在源小区的切换原因参考值比 UE在目标小区 的切换原因参考值差的具体情况可能因为切换原因参考值的不同而出现不 同的情况。 例如切换原因参考值是上行 SINR时, 则 UE在源小区的 SINR 值比 UE在目标小区的 SINR值小时为 UE在源小区的切换原因参考值比 UE在目标小区的切换原因参考值差。 当切换原因参考值是上行 BLER时, UE在源小区的 BLER值比 UE在目标小区的 BLER值大时为 UE在源小区 的切换原因参考值比 UE在目标小区的切换原因参考值差。
本发明提供一实施例, 本实施例提供一种小区的切换判断方法, 该方 法在基站 1与基站 2之间完成。 为了描述的方便, 这里将基站 1作为源基 站,其对应的小区为小区 1 ,基站 2作为目标基站,其对应的小区为小区 2, 小区 1与小区 2为相邻关系。 本实施例的切换方向如图 2所示, 可以为: 小区 1向小区 2切换。 本实施例可以通过空口转发, 即基站 1将切换原因 和相关信息均通过空中接口转发给基站 2。下面实施例实现的场景也可以釆 用空口转发的方式转发。 本实施例的切换原因以上行信号质量为例, 其中 上行信号质量的参数本实施例选择 SINR。 当然, 在实际应用中, 还可以选 择其他的参数, 例如, BLER、 上行控制物理信道(Uplink Physical Uplink Control channel , UL PUCCH ) 的 BLER、 上行共享物理信道 ( Uplink Physical Uplink shared channel, UL PUSCH )的 BLER等中的任意组合。 当 然在实际情况中, 也可以选择其他参数, 本发明并不局限具体的参数。 该 方法如图 3所示, 包括: S31、基站 1检测到 UE的上行 SINR很差(例如不满足预设的门限值 ) 时, 基站 1决定将 UE切换到基站 2;
532、 基站 1将 UE在小区 1的上行 SINR信息发送给基站 2;
进一步, 基站 1还可以向基站 2发送切换原因, 该切换原因可以表示 为 "上行 SINR较差" 。
533、 基站 2接收到 UE在小区 1的上行 SINR信息;
进一步, 基站 2还接收到 UE切换到小区 2的切换原因。
534、 基站 2比较 UE在小区 1的上行 SINR和 UE在小区 2的 SINR, 当比较结果为小于时, 不将小区 1作为该 UE的下次切换的目标小区。
需要说明的是, 基站 1决定将 UE切换到基站 2的触发条件除了 S31 的 UE的上行 SINR很差外, 还可以有其他的条件。 例如, UE处于小区 1 的边界, 由于小区 1干扰环境导致 SINR变差或 BLER升高,此时通过频域 资源块( resource block, RB )资源协调(例如从 RBI调度到 RB2 )不能消 除干扰时, 基站 1将决定把 UE切换到基站 2。
当然还可以出现其他的情况, 例如在多载波情况下, 例如 CA, UE使 用 carrier2作为业务信道, 由于 carrierl 中的干扰环境恶化导致 SINR变差 或 BLER升高。 基站可以根据 PCell变更, 使得该 UE 的 PCell从 Carrierl 变为 Carrier2 也就是切换。 CA中这种变换载波的 HO可能是同基站的, 但 CoMP 场景下也有可能是异基站的。
本发明具体实施方式提供又一实施例, 本实施例提供一种小区的切换 判断方法, 该方法如图 4所述。 本实施例与图 3所示的实施例的不同点在 于, 本实施例的切换原因可以为: 下行信号质量的切换, 上述相关信息可 以为: UE下行 SINR、 CQI, 当然在实际应用中,上述相关信息还可以包括: 下行 DL控制信道 ( hysical downlink control channel , PDCCH ) 、 下行 DL共享物理信道 (physical downlink shared channel, PDSCH) 的 BLER ; UE的 CQI反馈等等。 另外, 需要说明的是, 本实施例的切换有两种情况:
情况 1 : 在小区边界的 DL信号质量较差导致的切换;
情况 2:在载波聚合或多点协作发送接收 (coordinated multi-point transmission/reception, CoMP)下, 一个站点的小区将含有不同频率的单元 celL 例如 Carrier 1 的 celll 与 Carrier2 的 cell2. 当 UE选择 Carrier 1的小 区为 PCell, 而 Carrierl所受到的干扰程度较高, 信号质量较差, 那么基站 将做 Pcell的倒换, 将 Pcell 由 celll 换为 cell2. 对于 UE而言 PCell的倒换 便是切换过程。 这将符合应为 DL信号质量变差导致的切换。 此情况下, 切 换原因参考值可以为:切换 UE的频率信息以及终端在该频率层的上行信号 质量。
本发明具体实施方式提供另一实施例, 本实施例提供一种小区的切换 判断方法, 该方法如图 5所示。 本实施例与图 3所示的实施例不同点在于, 上述切换原因可以为: UE吞吐量的切换, 切换原因参考值可以为: RB 占 用率或单位 RB占用率下的 UE传输速率, 其中, 图 5以 RB占用率为例。
另外, 本实施例切换的分为 2种情况:
情况 1 : 基于 UE无线资源量的切换 (资源受限) 。 以 RB资源为例, 当小区 1中的 RB资源不足以满足 UE的某种业务需求, 如 UE开始新的更 高比特率的业务需求 ,基站将该 UE切换到能够提供更多 RB资源的小区中, 此时,切换原因参考值可以为 UE资源的占用率也就是 RB占用率或资源利 用率。
情况 2: 基于 UE无线资源使用情况(信道环境受限)的切换, 在一定 的信道环境中, UE以 RB资源能够提供的传输速率不同, 例如信道条件较 好那么可以使用更高阶的调制解调例如釆用 16QAM或 64QAM的高阶调制 解调, 而在某些信道环境较差的情况下 (例如干扰或空间障碍阻隔等情况 下 )导致使用同样的 RB资源, 所能够提供 UE的传输速率较低, 例如只能 使用较低的调制解调例如 QPSK等,此时基站需要将 UE切换到邻区小区中, 这次切换的切换原因参考值可以为单位 RB占用率下的 UE传输速率。
本发明具体实施方式还提供后一实施例, 本实施例提供一种小区的切 换判断方法, 该方法如图 6所示。 本实施例与图 3所示的实施例不同点在 于, 上述切换原因可以为: 基于 UE的用户数据标识符 (Subscriber Profile Identifier, SPID )切换, 切换原因参考值可以为: UE的下行信号质量, 例 如 UE下行的 SINR等。
本发明具体实施方式还提供下一实施例, 本实施例提供一种小区的切 换判断方法, 该方法如图 7所示。 本实施例与图 3所示的实施例不同点在 于, 上述切换原因可以为: 基于 IC 的切换, 切换原因参考值可以为: DL 业务信道 PDSCH的 SINR 、DL PDSCH 的 BLER或 UE的 CQI反馈等等。
本发明具体实施方式还提供下一个实施例, 本实施例在混合组网场景 中提供一种小区的切换判断方法。 该方法如图 8所示, 本实施例与图 3所 示的实施例不同点在于, 上述切换原因可以为: 基于负载的切换, 切换原 因参考值可以为: RB占用率等等。 当然在混合组网场景中, 该切换原因还 可以为: CRE的切换, 对应的切换原因参考值可以为: CRE bias的改变值。
本发明具体实施方式还提供另外一种实施例, 本实施例在多点协作发 送接收 (coordinated multi-point transmission/reception, CoMP)场景中提供一 种小区的切换判断方法, 该方法如图 9所示。 本实施例与图 3所示的实施 例不同点在于, 上述切换原因可以为: 基于控制信道重新分配导致的切换, 切换原因参考可以为: 切换前的该 UE吞吐率。
本发明具体实施方式还提供一种演进型基站, 该基站如图 10所示, 包 括:
接收单元 101 , 用于接收切换用户设备 UE 的相关信息, 将所述切换 UE的相关信息传递给判断单元 22;
判断单元 102, 用于根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基站下的源小区;所述切换 UE的相关信息包括:所述切换 UE 在源小区的切换原因参考值。
上述接收单元 101接收到的切换 UE的相关信息, 可以由源基站通过 X2接口发送给接收单元 101 ; 也可以由源基站发送给切换 UE,再由该切换 UE通过空口发送给接收单元 101。
本发明提供的基站在从目标基站切换回源基站时, 需要考虑切换 UE 的相关信息,根据该相关信息内的 UE在源小区的切换参考值确定是否将源 小区作为下次切换的目标小区, 由于本发明具体实施方式提供的方法在下 次切换时考虑了 UE在源小区的切换原因参考值,并在切换原因参考值较差 时不将源小区作为 UE在下次切换的目标小区,所以其能避免小区与目标小 区之间来回的 PingPong切换。
可选的, 上述切换原因参考值可以包括:
UE 在源小区的上行干扰加噪声比 SINR、 上行控制物理信道 UL PUCCH的误块率 BLER、 上行共享物理信道 UL PUSCH的 BLER的至少 一种。
可选的,上述所述切换原因参考值可以包括: UE在源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 UE在源小区的下行 CQI反馈的至少一种。
可选的,上述所述切换原因参考值可以包括: 源基站的资源块 RB占用 率、 源基站在单位 RB占用率下的 UE传输速率的至少一种。
可选的, 上述所述切换原因参考值可以包括: CRE bias的改变值。 可选的, 上述所述切换原因参考值可以包括: 切换前的所述切换 UE 所在源小区的吞吐率。
可选的, 上述判断单元 102具体用于:
比较接收单元 101接收的 UE的相关信息内包含的 UE在源小区的切换 原因参考值与 UE在目标小区的切换原因参考值, 当 UE在源小区的切换原 因参考值比 UE在目标小区的切换原因参考值差时, 不将源小区作为该 UE 的下次切换目标小区。
本发明具体实施方式还提供一种演进型基站, 该基站包括:
接收器 201 , 用于接收切换用户设备 UE的相关信息, 将所述 UE的相 关信息传递给处理器;
处理器 202, 用于根据所述切换 UE的相关信息判断是否将所述 UE切 换回源基站; 所述切换 UE的相关信息包括: 所述 UE在源小区的切换原因 参考值。
上述接收器 201接收到的切换 UE的相关信息, 可以由源基站通过 X2 接口发送给接收器 201 ; 也可以由源基站发送给切换 UE, 再由该切换 UE 通过空口发送给接收器 201。
本发明提供的基站在从目标基站切换回源基站时, 需要考虑切换 UE 的相关信息,根据该相关信息内的 UE在源小区的切换原因参考值确定是否 将源小区作为下次切换的目标小区, 由于本发明具体实施方式提供的方法 在下次切换时考虑了 UE在源小区的切换参考值,并在切换参考值较差时不 将源小区作为 UE在下次切换的目标小区,所以其能避免源小区与目标小区 之间来回的 PingPong切换。
可选的, 上述切换原因参考值可以包括:
UE 在源小区的上行干扰加噪声比 SINR、 上行控制物理信道 UL PUCCH的误块率 BLER、 上行共享物理信道 UL PUSCH的 BLER的至少 一种。
可选的,上述所述切换原因参考值可以包括: UE在源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 UE在源小区的下行 CQI反馈的至少一种。
可选的,上述所述切换原因参考值可以包括: 源基站的资源块 RB占用 率、 源基站在单位 RB占用率下的 UE传输速率的至少一种。
可选的, 上述所述切换原因参考值可以包括: CRE bias的改变值。 可选的,上述所述切换原因参考值可以包括: 切换前的该 UE所在源小 区的吞吐率。
可选的, 上述所述处理器 202具体用于:
比较所述接收器 201接收的 UE的相关信息内包含的 UE在源小区的切 换原因参考值与 UE在目标小区的切换原因参考值, 当 UE在源小区的切换 原因参考值比 UE在目标小区的切换原因参考值差时, 不将源小区作为该 UE的下次切换目标小区。
本发明另一实施例提供一种用户终端, 该用户终端可以作为上述小区 切换的判断方法中的切换用户终端使用, 因此, 上述小区切换的判断方法 中的概念和过程可适用于本实施例。 该用户终端包括:
信息接收单元 301 , 用于接收源基站发送的所述用户终端的相关信息, 所述用户终端的相关信息, 所述用户终端的相关信息包括所述用户终端在 所述源小区的切换原因参考值。
信息发送单元 302, 用于将所述用户终端的相关信息发送给目标基站, 以使得所述目标基站根据所述用户终端的相关信息判断是否将所述用户终 端切换回源基站下的源小区。
可选的, 上述切换原因参考值包括:
UE 在源小区的上行干扰加噪声比 SINR、 上行控制物理信道 UL PUCCH的误块率 BLER、 上行共享物理信道 UL PUSCH的 BLER的至少 一种。
可选的, 上述所述切换原因参考值包括: UE在源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 UE在源小区的下行 CQI反馈的至少一种。
可选的, 上述所述切换原因参考值包括: 源基站的资源块 RB占用率、 源基站在单位 RB占用率下的 UE传输速率的至少一种。
可选的, 上述所述切换原因参考值包括: CRE bias的改变值。 可选的,上述所述切换原因参考值包括: 切换前的该 UE所在源小区的 吞吐率。
应用本发明实施例提供的用户终端, 目标基站可以通过该用户终端获 取该用户终端在源基站的切换原因参考值, 并根据该切换原因参考值确定 是否将源小区作为下次切换的目标小区。 由于本发明具体实施方式提供的 技术方案在下次切换时考虑了 UE在源小区的切换参考值,并在切换参考值 较差时不将源小区作为 UE在下次切换的目标小区,所以其能避免源小区与 目标小区之间来回的 PingPong切换。 本领域普通技术人员可以理解实现上 述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完 成, 所述的程序可以存储于一计算机可读取存储介质中, 所述的存储介质, 如 ROM/RAM、 磁盘、 光盘等。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在 本发明的精神和原则之内所作的任何修改、 等同替换和改进等, 均应包含 在本发明的保护范围之内。

Claims

权利要求
1、 一种小区切换的判断方法, 其特征在于, 所述方法包括:
接收切换用户设备 UE的相关信息;
根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基站下 的源小区;
其中, 所述切换 UE的相关信息包括: 所述切换 UE在所述源小区的切 换原因参考值。
2、 如权利要求 1所述的方法, 其特征在于, 所述接收在发起切换操作 时源基站发送的切换 UE的相关信息, 包括:
接收发起切换的源基站发送的所述切换 UE的相关信息; 或者, 接收所述切换 UE转发的所述源基站在发起切换操作时发送的切换 UE 的相关信息。
3、 根据权利要求 1或 2所述的方法, 其特征在于,
所述切换原因参考值包括:所述切换 UE在所述源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种; 或者,
所述切换原因参考值包括: 所述切换 UE在所述源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的 误块率 BLER、 下行共享物理信道 DL PDSCH 的 BLER 、 UE在所述源小区的下行 CQI反馈的至少一种;或者,。
所述切换原因参考值包括: 源基站的资源块 RB占用率、源基站在单位 RB占用率下的 UE传输速率的至少一种;
当混合组网场景下, 所述切换原因参考值包括小区扩展偏移 CRE bias 的改变值; 或者,
所述切换原因参考值包括:切换前的所述切换 UE在所述源小区的吞吐 率。
4、 一种演进型基站, 其特征在于, 所述基站包括: 接收单元, 用于接收切换用户设备 UE的相关信息, 并将所述切换 UE 的相关信息传递给判断单元;
所述判断单元,用于根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基站下的源小区;
所述切换 UE的相关信息包括:所述切换 UE在所述源小区的切换原因 参考值。
5、 根据权利要求 4所述的演进型基站, 其特征在于,
所述切换原因参考值包括:所述切换 UE在所述源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种; 或者,
所述切换原因参考值包括: 所述切换 UE在所述源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的误块率 BLER、 下行共享物理信道 DL PDSCH的 BLER、所述切换 UE在所述源小区的下行 CQI反馈的至少一种; 或者,
所述切换原因参考值包括: 源基站的资源块 RB占用率、源基站在单位 RB占用率下的 UE传输速率的至少一种; 或者,
所述切换原因参考值包括: 小区扩展偏移 CRE bias的改变值; 或者, 所述切换原因参考值包括:切换前的所述切换 UE在所述源小区的吞吐 率。
6、 一种小区切换的判断方法, 其特征在于, 所述方法包括:
切换用户终端 UE接收源基站发送的所述切换 UE的相关信息,所述切 换 UE的相关信息包括所述切换 UE在所述源小区的切换原因参考值;
所述切换 UE将所述切换 UE的相关信息发送给目标基站,以使得所述 目标基站根据所述切换 UE的相关信息判断是否将所述切换 UE切换回源基 站下的源小区。
7、 如权利要求 6所述的方法, 其特征在于, 所述切换原因参考值包括:所述切换 UE在所述源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种; 或者,
所述切换原因参考值包括: 所述切换 UE在所述源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的误块率 BLER、 下行共享物理信道 DL PDSCH的 BLER、所述切换 UE在所述源小区的下行 CQI反馈的至少一种; 或者,
所述切换原因参考值包括: 源基站的资源块 RB占用率、源基站在单位 RB占用率下的 UE传输速率的至少一种; 或者,
所述切换原因参考值包括: 小区扩展偏移 CRE bias的改变值; 或者, 所述切换原因参考值包括:切换前的所述切换 UE在所述源小区的吞吐 率。
8、 一种用户终端, 其特征在于, 包括:
信息接收单元, 用于接收源基站发送的所述用户终端的相关信息, 所 述用户终端的相关信息包括所述用户终端在所述源小区的切换原因参考 值;
信息发送单元, 用于将所述用户终端的相关信息发送给目标基站, 以 使得所述目标基站根据所述用户终端的相关信息判断是否将所述用户终端 切换回源基站下的源小区。
9、 如权利要求 8所述的用户终端, 其特征在于, 包括:
所述切换原因参考值包括:所述切换 UE在所述源小区的上行干扰加噪 声比 SINR、上行控制物理信道 UL PUCCH的误块率 BLER、上行共享物理 信道 UL PUSCH的 BLER的至少一种; 或者,
所述切换原因参考值包括: 所述切换 UE在所述源小区的下行 SINR、 下行控制物理信道 DL PDCCH 的误块率 BLER、 下行共享物理信道 DL PDSCH的 BLER、所述切换 UE在所述源小区的下行 CQI反馈的至少一种; 或者,
所述切换原因参考值包括: 源基站的资源块 RB占用率、源基站在单位 RB占用率下的 UE传输速率的至少一种; 或者,
所述切换原因参考值包括: 小区扩展偏移 CRE bias的改变值; 或者, 所述切换原因参考值包括:切换前的所述切换 UE在所述源小区的吞吐 率。
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