WO2010063241A1 - 网络小区选择方法和装置 - Google Patents

网络小区选择方法和装置 Download PDF

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Publication number
WO2010063241A1
WO2010063241A1 PCT/CN2009/075339 CN2009075339W WO2010063241A1 WO 2010063241 A1 WO2010063241 A1 WO 2010063241A1 CN 2009075339 W CN2009075339 W CN 2009075339W WO 2010063241 A1 WO2010063241 A1 WO 2010063241A1
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Prior art keywords
base station
path loss
cell base
user equipment
serving cell
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PCT/CN2009/075339
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English (en)
French (fr)
Inventor
于映辉
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华为技术有限公司
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Publication of WO2010063241A1 publication Critical patent/WO2010063241A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • TECHNICAL FIELD Embodiments of the present invention relate to the field of communications technologies, and in particular, to a network cell selection method, a user equipment, and a base station.
  • BACKGROUND At present, user demands are becoming more and more diversified with the development of mobile communication systems. In order to meet such demands, system equipments in communication networks are also diversified, and home indoor coverage and enterprise-level internal coverage base stations and some of which are highly concerned.
  • AP Access Point
  • Primary Network Primary Network
  • Micro Cell and Pico. Cell
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE+ Long Term Evolution R10 or LTE+
  • CoMP Coordinated Multipoint Transmission/Reception
  • the UE may determine whether to start the intra-frequency measurement or the inter-frequency measurement of the low-priority cell according to the received power of the received serving cell base station signal. When the receiving power of the serving cell base station is lower than the corresponding threshold, the UE starts the same. The inter-frequency measurement of the frequency or low priority cell, and then the UE performs cell reselection according to the received power of the cell base station.
  • the UE may also initiate measurement based on the threshold, that is, when the received power of the serving cell base station is lower than the threshold corresponding to the active state.
  • the handover decision in the active state is based on the received power of the cell base station reported by the UE and the radio resource management of the evolved base station (Evoluting Node B; hereinafter referred to as eNB) (Radio resource management; RMC) Algorithm to decide.
  • eNB Radio resource management
  • RMC Radio resource management
  • the inventors have found that at least the following problems exist in the prior art:
  • the UE When the UE is in a heterogeneous network with different transmit powers of the cell base station, according to the existing judgment basis for using the received power as the serving cell of the selected UE
  • the UE may send a strong service to the serving cell, causing strong interference to the neighboring cell, resulting in an increase in interference signals of the network system and a decrease in system throughput.
  • the embodiments of the present invention provide a method and a device for selecting a network cell, so as to avoid interference to neighbor cells while implementing cell handover.
  • An embodiment of the present invention provides a network cell selection method, including:
  • a first acquiring module configured to acquire a path loss between the user equipment and the cell base station; and a selecting module, configured to select a serving cell for the user equipment according to the path loss.
  • the embodiment of the invention further provides a base station, which is characterized in that:
  • the second acquiring module is configured to obtain a path loss between the user equipment and the cell base station, and the determining module is configured to determine, according to the path loss, whether to perform serving cell handover.
  • the embodiment of the present invention provides a method for selecting a network cell, a user equipment, and a base station, and adopting a path loss between the UE and the cell as a basis for determining whether to perform measurement, reporting, or handover, so that the serving cell of the UE is more suitable, and the The serving cell chooses unnecessary interference to the neighboring cell, thereby reducing interference in the network system and improving the throughput of the system.
  • FIG. 1 is a schematic diagram of a UE switching between a pico cell and a macro cell;
  • FIG. 2 is a flowchart of a first embodiment of a method for selecting a network cell according to the present invention
  • FIG. 3 is a flowchart of a second embodiment of a method for selecting a network cell according to the present invention.
  • FIG. 4 is a schematic diagram of a first embodiment of a user equipment according to the present invention.
  • FIG. 5 is a schematic diagram of a second embodiment of a user equipment according to the present invention.
  • FIG. 6 is a schematic diagram of an embodiment of a base station according to the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
  • FIG. 1 is a schematic diagram of a UE switching between a pico cell and a macro cell. As shown in FIG. 1 , a UE is in a macro cell (Macro Ce ll ) and a pico cell (Pico Cel l ) at the same time, because a macro cell base station has a lower transmit power ratio than a pico cell. The cell is large, for example, 16 dB.
  • the path loss of the macro cell to the UE is 6 dB larger than that of the pico cell
  • the received power of the signal received by the UE by the macro cell base station is still 10 dB larger than that of the pico cell, so the power of the current received signal is
  • the level, that is, the received power, is a handover decision, and the macro cell is preferably the serving cell of the UE.
  • the path loss (pa th los s) is equal to the difference between the transmitted signal power of the base station and the received power of the signal received by the UE.
  • the path loss between the UE and the macro cell base station is greater than the path loss between the base station and the pico cell, so that the transmit power required by the UE to transmit data to the macro cell is higher than that of the pico cell.
  • the UE initiates a service to the macro cell, it will cause strong interference to the pico cell.
  • the embodiments of the present invention use the path loss between the user equipment and the cell base station as a parameter of the serving cell of the UE, and apply to the process of measurement and judgment, serving cell selection and reselection, reporting measurement report, and handover judgment. .
  • FIG. 2 is a flowchart of a method for selecting a network cell according to a first embodiment of the present invention. As shown in FIG. 2, the method for selecting a network cell includes the following steps:
  • Step 101 Obtain a path loss between the user equipment and the cell base station.
  • the user equipment can obtain the transmit power of the local cell or the local cell and the neighbor cell by using the broadcast of the cell base station. After acquiring the received power of the local cell or the neighbor cell, the received power is subtracted according to the transmit power.
  • the path loss between the UE and the local cell or the neighbor cell base station can be obtained.
  • the UE may report the received power or the reported path loss to the serving cell base station, and the serving cell base station may obtain the transmit power and calculate the path loss according to the received power reported by the UE. Of course, if the UE directly reports the path loss, the serving cell base station may directly obtain the path loss. Path loss.
  • Step 102 Select a serving cell for the user equipment according to the path loss.
  • the UE generally has two states: an idle (i d l e ) state and an active (ac t ve ) state.
  • an idle (i d l e ) state When the UE is in an idle state, the path loss between the UE and the cell base station and the received power of the cell base station may be acquired, and whether the neighbor cell is measured according to the path loss, or whether the neighbor cell is determined according to the path loss and the received power The measurement is performed; if measured, the UE determines whether to perform serving cell selection and reselection according to the measurement result.
  • the UE When the UE is in an active state, it is determined whether to measure the neighboring cell according to the path loss and/or the received power; if the measurement is performed, the user equipment determines whether to report the measurement report to the serving cell base station according to the measurement result; if the measurement report is reported, The serving cell base station determines whether to perform the serving cell handover according to the measurement report.
  • the UE needs to perform measurement control in both the idle state and the activated state.
  • the UE determines whether to measure the neighbor cell according to the path loss, or judges whether to measure the neighboring cell according to the path loss and the received power, and can be classified into the following cases:
  • the user equipment performs measurement on other neighbor cells.
  • the received power of the neighboring cell base station may be acquired, or the transmit power of the neighbor cell base station may also be acquired, and then the second path loss between the user equipment and the neighbor cell base station may be calculated.
  • the neighboring cell may include a high-priority neighbor cell, a co-frequency neighbor cell, and a low-priority neighbor cell, and different power measurement thresholds may be set for different types of neighbor cells.
  • Case 2 When the serving cell broadcasts the transmit power of the neighbor cell base station, and the UE can obtain the transmit power of the neighbor cell base station through the broadcast of the serving cell, the UE in the idle state and the active state determines whether the path loss and/or the receive power are correct.
  • the neighbor cell performs measurements.
  • the broadcast of the neighbor cell transmission power may be based on a cell or a cell set, or may be based on a frequency or a frequency set.
  • the transmit power includes a specific transmit power value or a transmit power level.
  • the UE may determine whether to measure the neighbor cell by using the method in the first case: or if the first path loss between the user equipment and the serving cell base station is greater than the set path loss measurement threshold, determining that the user equipment measures the neighbor cell Or if the first path loss between the user equipment and the serving cell base station is greater than the set path loss measurement threshold, and the first received power of the serving cell base station is less than the set power measurement threshold, determining that the user equipment is The neighbor cell performs measurements.
  • the UE can acquire the transmit power of the serving cell and the neighbor cell base station, after the UE has acquired the transmit power of the neighbor cell base station and receives the received power of the serving cell and the neighbor cell base station, the corresponding cell can be calculated.
  • a path loss and a second path loss corresponding to the neighbor cell and thus may also be based on a difference between the first path loss and the second path loss Performing measurement judgment: If the first path loss is higher than the second path loss, and the difference between the two is greater than the set path loss measurement threshold, the UE measures other neighbor cells to obtain a path between the UE and other neighbor cell base stations.
  • the UE measures other neighbor cells, and obtains Path loss between the UE and other neighbor cell base stations.
  • the other neighboring cells may include a high-priority neighbor cell, an intra-frequency neighbor cell, and a low-priority neighbor cell, and different power measurement thresholds may be set for different types of neighbor cells.
  • the following processing schemes may be available for different states of the UE.
  • the serving cell selection and reselection can be performed according to the path loss and/or the received power in the measurement result.
  • the method for the UE to perform serving cell selection and reselection according to the path loss and/or the received power includes the following situations: 1) if the path loss is less than the set path loss reselection threshold, the user equipment services according to the received power.
  • the user equipment performs serving cell selection and reselection according to the path loss; 3) or if the path loss is less than the set path The loss reselection threshold, and the received power is greater than the set power reselection threshold, the user equipment performs serving cell selection and reselection according to the received power and/or the path loss.
  • the path loss method and the priority method may be adopted.
  • the path loss method is: When the received power is greater than a certain value, the cell with the lowest path loss is selected as the serving cell of the UE according to the path loss from low to high.
  • the priority method is: if the path loss of the high priority cell is less than the set reselection threshold, the cell of the high priority is selected; if the path loss of the same priority cell is less than the set reselection threshold, the path loss is low.
  • Selecting to a high criterion if the path loss of the low priority cell is less than the set reselection threshold, and there is no suitable high priority and same priority cell, when the path loss of the serving cell is greater than the set threshold, then Select a cell with a low priority.
  • different priority cells can be set. The same reselection threshold.
  • the receiving power may be selected in the order of high to low. Or according to the priority method described above, the selection is based on the received power and the priority of the cell.
  • the path loss may be from low to high, and the received power is high to low.
  • the order is selected according to criteria such as the priority of the cell.
  • the UE In the active state, after the UE measures the neighbor cell, it can determine whether the measurement report will be reported to the serving cell base station, and the serving cell base station determines whether to perform the serving cell handover.
  • the UE may determine whether the reporting criterion is met according to the path loss and/or the received power, and report the measurement report, including the following methods:
  • the first measurement report is reported to the serving cell base station according to the path loss between the user equipment and the cell base station, and the first measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • Determining whether to report the measurement report according to the path loss may include: determining, according to the first path loss between the user equipment and the serving cell base station, whether to report the first measurement report to the serving cell base station, where the first measurement report includes the first path Determining whether to report the first measurement report to the serving cell base station according to the second path loss between the user equipment and the neighboring cell base station, where the second measurement loss is included in the first measurement report; or according to different access modes
  • the path loss between the base stations of the neighboring cells is determined whether the first measurement report is reported to the serving cell base station, where the first measurement report includes path loss between the user equipment and the neighbor cell base station of different access modes.
  • the reporting event may be set according to the path loss, and the reporting event may be similar to the reporting event according to the power loss, for example, using “C1” - “C5,”, “Dl”, “D2”, etc. respectively represent different reporting Event: “C1” represents that when the path loss A between the UE and the serving cell base station is less than a reporting threshold, it reports A; “C2" represents the path loss between the UE and the serving cell base station.
  • report A If the consumption A is greater than a reporting threshold, report A; "C 3" represents that the path loss B between the UE and the neighboring cell base station is smaller than the path loss A between the UE and the serving cell base station, and is reported to B; "C4""If the path loss B between the UE and the neighboring cell base station is less than a reporting threshold, report B; “C5" represents that the path loss A between the UE and the serving cell base station is greater than a reporting threshold of 1, and the UE and the neighbor cell base station When the path loss B is less than a reporting threshold 2, report B;
  • the first measurement report may further include a receiving power corresponding to the cell that meets the reporting condition.
  • the second method it is determined whether the second measurement report is reported to the serving cell base station according to the received power of the cell base station, where the second measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the UE uses the reporting event according to the received power to report the reported event, and the second measurement report that is reported may include not only the received power of the cell that satisfies the reporting condition, but also the path loss corresponding to the cell that meets the reporting condition, or includes the report.
  • the path loss and received power corresponding to the conditional cell base station may include not only the received power of the cell that satisfies the reporting condition, but also the path loss corresponding to the cell that meets the reporting condition, or includes the report.
  • the third method it is determined whether the third measurement report is reported to the serving cell base station according to the path loss between the user equipment and the cell base station and the received power of the cell base station, where the third measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the UE will use the common receiving power and the path loss corresponding to the cell as the parameter for setting the reporting event. For example, in the reporting event, the reporting condition that the path loss needs to be met can be set while setting the receiving power to meet the reporting condition.
  • the third measurement report that is reported may also include information such as received power and/or path loss corresponding to the cell that satisfies the reporting condition.
  • the serving cell base station can obtain information such as the path loss or the received power that meets the reporting condition from the measurement report reported by the UE. Then, the serving cell base station receives the received power according to the path loss it acquires.
  • the rate or information such as the RRM obtained from the network side determines whether the UE performs handover of the serving cell, and determines information such as the target cell to be handed over.
  • a method similar to serving cell selection and reselection in the idle state of the UE may be adopted.
  • the target cell whose path loss meets the set value and has the strongest received power is switched to the serving cell of the UE, or the target cell whose received power meets the set value and the path loss is minimized is switched to the serving cell of the UE, etc.
  • the actual situation specifies the criteria for switching judgment, which is not limited herein.
  • the serving cell base station may obtain the path loss directly from the measurement report reported by the UE, or calculate the path loss according to the received power reported by the UE.
  • the cell base station does not broadcast the information about the transmit power of the base station, such as the transmit power level, the transmit power level, or the transmit power-related code
  • the UE cannot acquire the transmit power of the cell base station, and therefore cannot calculate the path loss, and the serving cell base station needs to
  • the transmit power of the cell base station is obtained through an interface between the networks, for example, an X2 port between the base stations or an S1 port between the base station and the core network.
  • the serving cell base station receives the received power of the cell base station measured and reported by the UE, calculates the path loss between the UE and the cell base station, and determines whether to perform the UE according to the path loss, the received power, or the RRM obtained from the network side. The operation of the serving cell handover.
  • the path loss between the UE and the cell base station is used as a basis for determining, reporting, or switching, so that the serving cell of the selected UE is more suitable, and the interference to the neighbor cell caused by improper selection of the serving cell is reduced. It reduces unnecessary interference in the network system and improves the throughput of the system.
  • FIG. 3 is a flowchart of a method for selecting a network cell according to a second embodiment of the present invention.
  • a cell selection method in which a UE is simultaneously in a macro cell (Macro Cel 1 ) and a cell (Pico Cel 1 ) is taken as an example for description.
  • the macro cell is the serving cell of the UE
  • the pico cell is the neighbor cell of the UE.
  • the network cell selection method includes the following steps:
  • Step 201 The macro cell and the pico d, the regional base station broadcast respective transmit powers.
  • the serving cell of the UE is a macro cell, and the macro cell base station may broadcast only its own transmit power, or may broadcast the transmit power of the pico-cell base station. At this time, the UE can only acquire the macro cell base station. The transmit power can also acquire the transmit power of the picocell base station at the same time.
  • Step 202 The UE acquires the received power of the base station.
  • the UE may acquire only the received power of the macro cell base station, or may simultaneously acquire the received power of the pico cell base station.
  • Step 203 The UE calculates a path loss between the UE and the base station.
  • the UE may calculate the path loss LP_1 between the UE and the macro cell base station, or calculate the path loss LP_2 between the UE and the pico base station.
  • Step 204 The UE determines whether it is necessary to initiate measurement on the neighbor cell.
  • the UE may determine whether to initiate measurement of the neighbor cell according to the path loss; or determine whether to initiate measurement of the neighbor cell according to the path loss and the received power.
  • the measurement of the picocell is started to acquire the received power or LP_2 of the picocell base station;
  • LP_1 When LP_1 is greater than LP_2, and the difference between the two is greater than the set measurement threshold, start measurement on other neighbor cells to obtain the received power or path loss corresponding to other neighbor cells; or when LP_1 is greater than LP_ 2.
  • the difference between the two is greater than the set measurement threshold and the received power of the macro cell base station is less than the measurement threshold, the measurement of other neighbor cells is started to obtain the received power or path loss corresponding to other neighbor cells.
  • Step 205 If measuring, select a serving cell for the UE according to the measurement result.
  • the UE performs serving cell selection and reselection according to the measurement result.
  • the measurement result includes information such as the transmit, receive power, and path loss of the macro cell, the pico cell, and other neighbor cell base stations
  • the service cell selection and reselection may be performed according to the following method: if the path loss is less than the set reselection threshold Then, the UE performs serving cell selection and reselection according to the received power. For example, if the path loss corresponding to the pico cell and the other neighbor cell is smaller than the set path loss reselection threshold, and the received power of the pico cell base station is large, the UE selects the pico cell as the serving cell.
  • the method performs service cell selection and reselection: if the received power is greater than the set power reselection threshold, the UE performs serving cell selection and reselection according to the path loss; or if the path loss is less than the set path loss reselection threshold, and the received power is greater than The set power reselection threshold then the UE performs serving cell selection and reselection based on received power and/or path loss. For example, if the received power of the macro cell and the pico cell base station is greater than the set power reselection threshold, and the path loss corresponding to the pico cell is low, the UE selects the pico cell as the serving cell. The UE may also select according to the priority in the cell that satisfies the power and path loss reselection thresholds.
  • the UE determines whether to report the measurement report to the macro cell base station according to the measurement result; if the measurement report is reported, the macro cell base station determines whether to perform the serving cell handover according to the measurement report.
  • the method for the UE to determine whether to report the measurement report to the macro cell base station specifically includes the path loss as the reporting basis, or the received power as the reporting basis, and the measurement report includes the path loss or the received power corresponding to the cell that meets the reporting condition.
  • the UE uses the path loss as the basis for reporting, it can use the reporting event setting different from the receiving power to set a set of events similar to the receiving power, such as using "C1" - "C5", "Dl", "D2", etc.
  • "D2" reports the path loss and the received power corresponding to the cell satisfying the condition to the macro cell base station.
  • the above reported thresholds are set according to actual conditions, and may be the same or different.
  • the macro cell base station determines whether it is necessary to handover the serving cell according to the received power, LP_1, LP_2 or LP_3 in the measurement report and the RRM algorithm. If the handover is not required, the UE continues to use the macro cell as the serving cell, and if handover is required, the UE Pico cell or other neighbor cell For the service community.
  • the macro cell transmit power is 16 dB larger than the pico cell
  • the macro cell receive power is 6 dB larger than the pico cell
  • the measurement is started if the set LP_1 is 5 dB larger than LP_2.
  • the path loss and the received power of the neighboring cell may be measured.
  • the reported event is "C3": If the serving cell has a path loss greater than 5 dB corresponding to the neighbor cell, report the path loss of the neighbor cell or Receive power. Then, the UE reports LP_2, and can also report the received power of the picocell base station.
  • the UE reports the LP_2, and can also report the received power of the other neighboring cell base stations. Then the macro cell base station can switch the UE to the pico cell. After the handover, the UE can serve through the pico cell without causing unnecessary interference to the macro cell.
  • the method of the macro cell base station acquiring the cell path loss is different.
  • the UE since the UE cannot obtain the transmission power of the pico-cell base station by broadcasting, the path loss cannot be calculated. Therefore, the UE does not have the transmission power and path loss of the pico-cell base station in the measurement report reported to the macro-cell base station, and the macro The cell base station may acquire the transmit power of the pico-cell base station through the X2 port between the base stations or the S1 port between the base station and the core network, and receive the received power of the macro cell and the pico-cell base station reported by the UE.
  • the macro cell base station calculates LP_1 and LP_2 according to the transmit power and the received power, and determines whether it is necessary to switch to another cell according to the received power, LP-1 and LP_2, and the RRM algorithm, and obtains the target cell of the handover, and then The UE switches to the target cell.
  • the path loss between the UE and the cell base station is used as a basis for determining, reporting, and switching, so that the serving cell of the selected UE is more suitable, and the interference caused by improper selection of the serving cell is reduced, and the system is improved.
  • Throughput is used as a basis for determining, reporting, and switching, so that the serving cell of the selected UE is more suitable, and the interference caused by improper selection of the serving cell is reduced, and the system is improved.
  • the user equipment includes a first acquiring module 1 and a selecting module 2.
  • the first obtaining module 1 is configured to acquire a path loss between the user equipment and the cell base station; and the selecting module 2 is configured to select a serving cell for the user equipment according to the path loss.
  • the first acquiring module 1 of the UE acquires the transmit power and the received power of the cell base station, and calculates the path loss between the UE and the cell base station according to the transmit power and the received power, and the selecting module 2 selects the UE according to the path loss.
  • Service area In the idle state, the UE may determine whether to measure the neighbor cell according to the path loss, and if the measurement, perform the serving cell selection and reselection according to the measurement result. In the active state, the UE may determine whether to measure the neighbor cell according to the path loss. If the measurement is performed, determine whether to report the measurement report to the serving cell base station according to the measurement result, and if the measurement report is reported, the serving cell base station according to the measurement report. It is judged whether or not the serving cell handover is performed.
  • the first acquiring module of the UE acquires the path loss between the UE and the cell base station, and uses the path loss as a basis for judging whether to perform operations such as performing measurement and reporting, and the selecting module selects a suitable serving cell for the UE, which is reduced. Interference caused by improper selection of the serving cell to the neighboring cell, thereby reducing interference in the network system and improving the throughput of the system.
  • FIG. 5 is a schematic diagram of a second embodiment of a user equipment according to the present invention.
  • the first obtaining module 1 may include a first acquiring unit 1 1 and a second acquiring. Unit 12.
  • the first acquiring unit 11 is configured to acquire the transmit power and the received power of the cell base station.
  • the second acquiring unit 12 is configured to obtain a path loss between the user equipment and the cell base station according to the transmit power and the received power.
  • the selection module 2 may include a determination unit 21 and a measurement unit 22.
  • the determining unit 21 is configured to determine, according to the path loss, whether the measuring unit 22 is configured to measure the neighboring cell, or determine, according to the path loss and the received power, whether the measuring unit 22 is configured to measure the neighboring cell; and the measuring unit 22 is configured to The indication of the judging unit 21 measures the neighbor cell.
  • the determining unit 21 may include: a first determining subunit, and a second determining Any one or more of the subunit, the third judging subunit, and the fourth judging subunit, the first judging subunit is configured to: if the first path loss between the user equipment and the serving cell base station is greater than the set path loss measurement The threshold indicates that the measurement unit 22 performs measurement on the neighbor cell; and the second determination subunit is configured to: if the first path loss between the user equipment and the serving cell base station is higher than the second path loss between the user equipment and the neighbor cell base station, If the difference between the two is greater than the set path loss measurement threshold, the measurement unit 22 is configured to measure other neighbor cells; and the third determining sub-unit is configured to: if the first path loss between the user equipment and the serving cell base station is greater than the set The path loss measurement threshold, and the first received power of the serving cell base station is less than the set power measurement threshold, indicating that the measuring unit 22 performs measurement on the neighbor cell; and the fourth determining subunit is used between the user
  • the first path loss is higher than the second path loss between the user equipment and the neighbor cell base station, and the difference between the two is greater than the setting. Measure the path loss threshold, and the first base station received power of the serving cell is less than the set threshold power measurements, the measurements indicate that the measurement unit 22 to other neighbor cells.
  • the selection module 2 may further include a selection unit 23 and/or a reporting unit 24.
  • the selecting unit 23 is configured to determine whether to perform serving cell selection and reselection according to the measurement result of the measuring unit 22; the reporting unit 24 is configured to determine whether to report the measurement report to the serving cell base station according to the measurement result of the measuring unit 22.
  • the selection unit 23 may include any one or more of the first selection sub-unit, the second selection sub-unit, and the third selection sub-unit.
  • the first selecting subunit is configured to: if the path loss is less than the set path loss reselection threshold, the user equipment performs serving cell selection and reselection according to the received power; and the second selecting subunit is configured to receive the If the power is greater than the set power reselection threshold, the user equipment performs serving cell selection and reselection according to the path loss; and the third selection subunit is configured to: if the path loss is less than the set path loss reselection threshold, and the received power is greater than The set power reselection threshold, the user equipment performs serving cell selection and reselection according to the received power and/or the path loss.
  • the reporting unit 24 may include any one or more of the first reporting subunit, the second reporting subunit, and the third reporting subunit.
  • the first reporting subunit is configured to determine whether to serve according to the path loss between the user equipment and the cell base station.
  • the first measurement report is sent by the base station, and the first measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the second reporting sub-unit is configured to determine whether to report the second measurement to the serving cell base station according to the received power of the cell base station.
  • the second measurement report includes a path loss corresponding to the cell that meets the reporting condition; and the third reporting sub-unit is configured to determine, according to the path loss between the user equipment and the cell base station, and the received power of the cell base station, whether to the serving cell base station A third measurement report is reported, where the third measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the first acquiring unit 1 1 of the first acquiring module 1 of the user equipment acquires the receiving power of the cell base station. If the UE broadcasts the transmitting power of the corresponding cell base station by using the cell base station, the second acquiring unit 12 may The transmit power and the received power calculate the path loss between the UE and the cell base station.
  • the selection module 2 can select a serving cell for the UE according to the path loss.
  • the UE can perform measurement control by the judging unit 21 and the measuring unit 22 in the selection module 2, whether in the idle state or in the active state.
  • the determining unit 21 determines, according to the path loss, that if the neighboring cell needs to be measured, the measuring unit 22 is instructed to measure the neighboring cell.
  • the different judging unit 21 according to the judging criteria can be divided into a plurality of judging subunits.
  • the determining unit 21 determines whether to measure the neighboring cell according to the path loss, and if the first path loss is greater than the set path loss measurement threshold, the second determining subunit instructs the measuring unit 22 to measure the neighboring cell, where the first determining subunit Instructing the measuring unit 22 to measure the neighboring cell to obtain the received power of the neighboring cell base station, or acquire the second path loss between the UE and the neighboring cell base station; or if the first path loss is higher than the second path loss, and If the difference between the two is greater than the set path loss measurement threshold, the third determining subunit instructs the measuring unit 22 to measure other neighboring cells, and obtain path loss between the UE and other neighboring cell base stations or the receiving power of other neighboring cell base stations.
  • the determining unit 21 determines whether to measure the neighbor cell according to the path loss and the received power, and if the first path loss is greater than the set path loss measurement threshold, and the first received power is less than the set power measurement threshold, the third determining subunit indicates The measuring unit 22 measures the neighboring cell to obtain the received power of the neighboring cell base station, or obtains the second path loss; or if the first path loss is higher than The second path loss, the difference between the two is greater than the set path loss measurement threshold, and the first received power of the serving cell base station is less than the set power measurement threshold, and the fourth determining subunit indicates the measuring unit
  • the selecting unit 23 determines whether to perform serving cell selection and reselection based on the measurement result of the measuring unit 22.
  • the first selection subunit may perform serving cell selection and reselection according to the received power; when the received power of the cell base station is greater than the set power reselection threshold
  • the second selection subunit may perform serving cell selection and reselection according to path loss between the UE and the cell base station; when the path loss between the UE and the cell base station is less than a set path loss reselection threshold, and the cell base station receives
  • the third selection subunit may perform service cell selection and reselection according to the received power and path loss according to the received power or path loss.
  • the determining unit 21 may also determine whether to measure the neighboring cell according to the received power, and if the measurement is needed, instruct the measuring unit 22 to measure the neighboring cell, and then the selecting unit 2 2 determines whether to perform the serving cell according to the path loss in the measurement result. Select and reselect. For the specific method for the UE to perform the serving cell selection and the reselection according to the measurement result, reference may be made to the content of the serving cell selection and reselection by the UE in the first embodiment of the network cell selection method of the present invention, which will not be described again.
  • the reporting unit 24 determines whether to report the measurement report to the serving cell base station according to the measurement result of the measurement unit 22.
  • the first reporting sub-unit determines whether to report the first measurement report to the serving cell base station according to the path loss between the UE and the cell base station, where the first measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the path loss between the UE and the cell base station is used as a method for determining the reporting basis. For reference, the description may be made in the first embodiment of the network cell selection method of the present invention.
  • the second reporting sub-unit may determine whether to report the second measurement report to the serving cell base station according to the received power, where the second measurement report includes a path loss corresponding to the cell that meets the reporting condition.
  • the third reporting subunit can simultaneously follow the path The loss and the received power determine whether to report the third measurement report to the serving cell base station, where the third measurement report may include a path loss corresponding to the cell that meets the reporting condition.
  • the receiving power corresponding to the cell that meets the reporting condition may also be included in any one or more of the first measurement report, the second measurement report, and the third measurement report.
  • the determining unit 21 may determine whether to measure the neighboring cell according to the received power, and if the measurement is required, the measuring unit 22 performs measurement on the neighboring cell, and then the reporting unit 24 determines whether to the serving cell according to the path loss in the measurement result.
  • the base station reports the measurement report.
  • the base station judges according to the received power, the path loss, or the RRM obtained from the network side in the measurement report reported by the UE, to determine whether it is necessary to switch the serving cell, how to switch, and the target cell to be handed over.
  • the first acquiring module of the UE acquires the path loss between the UE and the cell base station, and uses the path loss as a judgment basis to instruct the selecting module to select a suitable serving cell for the UE, and reduces the neighboring cell due to improper selection of the serving cell.
  • the resulting interference reduces interference within the network system and increases system throughput.
  • FIG. 6 is a schematic diagram of an embodiment of a base station according to the present invention.
  • the base station includes: a second acquiring module 4 and a determining module 5, where the second acquiring module 4 is configured to acquire path loss between the user equipment and the cell base station.
  • the judging module 5 is configured to judge whether to perform the serving cell handover according to the path loss.
  • the UE in the active state, if the UE needs to replace the serving cell, the UE needs to send the measurement result to the base station on the network side, and the UE may send the result of the measurement to the second acquiring module of the base station in the form of measurement. 4.
  • the judging module 5 then performs a handover decision based on the measurement report and other information on the network side.
  • the second obtaining module 4 may include a third obtaining unit and/or a fourth obtaining unit, where the third obtaining unit is configured to receive a measurement report reported by the user equipment, where the measurement report includes the user equipment and the cell base station And a fourth acquisition unit, configured to receive a measurement report reported by the user equipment, where the measurement report includes a received power of the cell base station, and calculates a path loss between the user equipment and the cell base station according to the received power.
  • the third acquiring unit may The path loss between the UE and the cell base station is obtained directly from the measurement report.
  • the fourth acquisition unit may pass the X2 port between the cell base stations or the base station and the core network.
  • the S 1 port obtains the transmit power of the cell base station, and receives the received power of the cell base station reported by the UE, and then calculates the path loss between the UE and the cell base station according to the transmit power and the received power.
  • the determining module 5 determines whether it is necessary to switch to another cell according to the path loss between the UE and the cell base station, and obtains the target cell of the handover, and then switches the UE to the target cell.
  • the second acquiring module of the base station embodiment of the present invention acquires the path loss between the network and the cell base station, and the determining module performs the handover decision based on the path loss, and switches the UE to a more suitable serving cell, thereby reducing the serving cell pair. Interference caused by neighbor cells, thereby reducing interference within the network system and improving system throughput.
  • the network system embodiment of the present invention includes a base station, configured to acquire a path loss between the user equipment and the cell base station, and determine whether to perform the serving cell handover according to the path loss.
  • the base station determines whether to perform handover between cells according to the obtained path loss between the UE and the cell base station and the RRM obtained from the network side. If handover is required, the base station may also determine how to perform handover and handover.
  • the target cell, and the UE is switched to the target cell.
  • the base station can directly obtain the path loss between the UE and the cell base station from the measurement report reported by the UE, and obtain the transmit power and the received power of the cell base station from the measurement report reported by the UE, and then calculate the relationship between the UE and the cell base station.
  • the path loss may also be obtained from the measurement report reported by the UE, and the transmit power of the cell base station is obtained through an interface between the network, such as an X2 port between the base stations and an S1 port between the base station and the core network. The path loss between the UE and the cell site is then calculated.
  • the user equipment and the base station provided in the foregoing embodiment may use the user equipment and the base station provided in the foregoing embodiments.
  • the specific structure of the user equipment and the base station in the network system is not described in detail herein.
  • the path loss between the UE and the cell base station is used as a basis for determining whether to perform measurement, reporting, or handover, so that the UE is in a suitable serving cell, and reducing the neighboring cell caused by improper selection of the serving cell. Necessary interference, which reduces internal interference and improves system throughput.

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Description

网络小区选择方法和装置
本申请要求于 2008 年 12 月 5 日提交中国专利局、 申请号为 200810239057. K 发明名称为 "网络小区选择方法、 用户设备、 基站和网 络系统" 的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域 本发明实施例涉及通信技术领域， 特别是一种网络小区选择方法、 用 户设备和基站。 背景技术 目前， 用户需求随着移动通信系统的发展越来越多样化， 为了适应这 种需求通讯网络中系统设备也出现多样化， 备受关注的家庭室内覆盖和企 业级的内部覆盖基站以及一些其他热点覆盖等网络应运而生， 例如： 家庭 基站（Home NodeB) , 接入点（Access Point; 以下筒称： AP)、 私有网络 (Private Network) , 微小区（Micro Cell)和微微小区（Pico Cell)等。 这 些小区的特点是覆盖范围小， 基站的发射功率也比宏小区 （Macro Cell ) 基站的发射功率小。 在第三代合作伙伴计划（3rd Generation Partnership Project; 以下筒称： 3GPP)的一些提案中， 认为宏小区和这种覆盖范围小 的网络的基站发射功率可能相差 16dB。 另外， 在长期演进系统（Long Term Evolution; 以下筒称： LTE)发布版本 10 (也称为： LTE R10或 LTE+) 中， 随着提高系统吞吐量和提高边缘效率等的需求的提出， 引入了中继（ relay ) 节 点 以 及协调 多 点 发 送和接 收 ( Coordinated Multipoint Transmission/Reception; 以下筒称： CoMP ) 中的 AP等概念， 这些节点的 覆盖范围相对较小， 发射功率也较小。
在 LTE 中， 无论用户设备 (User Equipment; 以下筒称： UE )处于空 闲 （idle)状态还是激活 （active)状态， 都存在测量控制的问题。 在空 闲状态下， UE可以根据接收到的服务小区基站信号的接收功率， 决定是否 启动同频测量或低优先级小区的异频测量， 当服务小区基站的接收功率低 于对应的阈值时， 启动同频或低优先级小区的异频测量， 然后 UE根据小区 基站的接收功率进行小区重选。 在激活状态下， UE也可以基于阈值启动测 量， 也就是当服务小区基站的接收功率低于激活状态对应的阈值时启动测 量。 现有， 激活状态下的切换判决是基于 UE上报的小区基站的接收功率和 演进型基站（Evolut ion NodeB;以下筒称： eNB )自身的无线资源管理（Radio resource management ; 以下筒称： RRM)算法来决定的。
在实现本发明过程中， 发明人发现现有技术中至少存在如下问题： 当 UE处于小区基站的发射功率不同的异构网络时， 按照现有的以接收 功率作为选择 UE的服务小区的判断依据时， 可能出现选择的 UE的服务小 区不合适， 导致 UE向服务小区发起业务时的发射功率较强， 对邻居小区造 成较强的干扰， 从而造成网络系统干扰信号增加、 系统吞吐量降低等缺陷。 发明内容 本发明实施例提供一种网络小区选择方法和装置， 以在实现小区切换 的同时， 尽量避免对邻居小区造成干扰。
本发明实施例提供一种网络小区选择方法包括：
获取用户设备与小区基站之间的路径损耗；
根据所述路径损耗为所述用户设备选择服务小区。
本发明实施例又提供一种用户设备包括：
第一获取模块， 用于获取所述用户设备与小区基站之间的路径损耗； 选择模块， 用于根据所述路径损耗为所述用户设备选择服务小区。 本发明实施例还提供一种基站， 其特征在于包括：
第二获取模块， 用于获取用户设备与小区基站之间的路径损耗； 判断模块， 用于根据所述路径损耗判断是否进行服务小区切换。 本发明实施例提供一种网络小区选择方法、 用户设备和基站， 采用 UE 与小区之间的路径损耗作为是否进行测量、 上报或切换的判断依据， 使 UE 的服务小区更为合适， 降低了由于服务小区选择不当对邻居小区造成的不 必要的干扰， 从而减少了网络系统内的干扰、 提高了系统的吞吐量。 附图说明 图 1为 UE在微微小区和宏小区之间切换的示意图；
图 2为本发明网络小区选择方法第一实施例的流程图；
图 3为本发明网络小区选择方法第二实施例的流程图；
图 4为本发明用户设备第一实施例的示意图；
图 5为本发明用户设备第二实施例的示意图；
图 6为本发明基站实施例的示意图。 具体实施方式 下面通过附图和实施例， 对本发明的技术方案做进一步的详细描述。 图 1 为 UE在微微小区和宏小区之间切换的示意图， 如图 1所示， UE 同时处于宏小区 （Macro Ce l l )和微微小区 （Pico Cel l ) 中， 由于宏小区 基站的发射功率比微微小区大，例如 16dB, 虽然宏小区到 UE的路径损耗比 微微小区大 6dB, 但 UE接收到的宏小区基站的信号的接收功率还是比微微 小区大 10dB, 因此以当前的接收到的信号的功率水平即接收功率做切换判 决， 会优选宏小区为 UE的服务小区。 其中路径损耗（pa th los s)等于基站 的发射的信号发射功率与 UE接收到的该信号的接受功率的差值。 而当 UE 切换到宏小区上后， 由于 UE与宏小区基站之间的路径损耗大于与微微小区 基站之间的路径损耗，导致 UE发送数据到宏小区需要的发射功率比到微微 小区高出 4艮多， 若 UE再向宏小区发起业务的话， 就会对微微小区造成强干 扰。 以上只是以微微小区为例， 其他类似小区也会存在类似问题。 鉴于上述分析， 本发明各实施例将用户设备与小区基站之间的路径损 耗作为选择 UE的服务小区的参数，应用到测量判断、服务小区选择和重选、 上报测量报告和切换判断的过程中。
图 2为本发明网络小区选择方法第一实施例的流程图， 如图 2所示， 该网络小区选择方法包括以下步骤：
步骤 101、 获取用户设备与小区基站之间的路径损耗。
用户设备（ User Equipment ; 以下筒称： UE )可以通过小区基站的广 播获取本小区或本小区以及邻居小区的发射功率， 当获取本小区或邻居小 区的接收功率后， 根据发射功率减去接收功率可以得到 UE和本小区或邻居 小区基站之间的路径损耗。 UE可以向服务小区基站上报接收功率或也上报 路径损耗， 服务小区基站则可以获取发射功率后根据 UE上报的接收功率计 算路径损耗， 当然， 如果 UE直接上报路径损耗， 则服务小区基站可以直接 获得路径损耗。
步骤 102、 根据该路径损耗为用户设备选择服务小区。
UE—般有两种状态： 空闲 （i d l e )状态和激活 （ac t i ve )状态。 当 UE 处于空闲状态时， 可以获取 UE与小区基站之间的路径损耗和小区基站的接 收功率， 根据该路径损耗判断是否对邻居小区进行测量， 或根据该路径损 耗和接收功率判断是否对邻居小区进行测量； 若测量， 则 UE根据测量结果 判断是否进行服务小区选择和重选。 当 UE处于激活状态时， 根据该路径损 耗和 /或接收功率判断是否对邻居小区进行测量； 若测量， 则该用户设备根 据测量结果判断是否向服务小区基站上报测量报告； 若上报测量报告， 则 由该服务小区基站根据该测量报告判断是否进行服务小区切换。
其中 UE在空闲状态和激活状态都需要进行测量控制， UE根据路径损耗 判断是否对邻居小区进行测量， 或根据路径损耗和接收功率判断是否对邻 居小区进行测量可以分为以下情况：
情况一， 当服务小区和邻居小区基站广播各自的发射功率， 但 UE需要 通过邻居小区的基站广播获取但并未获取邻居小区基站的发射功率时， UE 根据路径损耗和 /或接收功率判断是否对邻居小区进行测量。
此时， 若用户设备与服务小区基站之间的第一路径损耗大于设置的路 损测量阈值， 则确定所述用户设备对邻居小区进行测量； 或若用户设备与 服务小区基站之间的第一路径损耗大于设置的路损测量阈值、 且所述服务 小区基站的第一接收功率小于设置的功率测量阈值， 则所述用户设备对其 他邻居小区进行测量。 测量过程中， 可以获取邻居小区基站的接收功率， 或也获取邻居小区基站的发射功率， 然后计算出用户设备与邻居小区基站 之间的第二路径损耗。 其中邻居小区可以包括高优先级邻居小区、 同频邻 居小区和低优先级邻居小区等， 对不同类型的邻居小区可以设置不同的功 率测量阈值。
情况二， 当服务小区广播邻居小区基站的发射功率， 且 UE可以通过服 务小区的广播获取邻居小区基站的发射功率时， 处于空闲状态和激活状态 的 UE根据路径损耗和 /或接收功率判断是否对邻居小区进行测量。
在情况二中， 邻居小区发射功率的广播可以是基于小区或小区集的， 也可以是基于频率或频率集的。 发射功率包括具体的发射功率值或者发射 功率级别。 UE可以采用情况一中的方法判断是否对邻居小区进行测量： 或 若用户设备与服务小区基站之间的第一路径损耗大于设置的路损测量阈 值， 则确定所述用户设备对邻居小区进行测量； 或若用户设备与服务小区 基站之间的第一路径损耗大于设置的路损测量阈值、 且所述服务小区基站 的第一接收功率小于设置的功率测量阈值， 则确定所述用户设备对其他邻 居小区进行测量。
此外， 由于 UE可以获取服务小区和邻居小区基站的发射功率， 当 UE 已获取邻居小区基站的发射功率、 且接收到服务小区和邻居小区基站的接 收功率后， 就可以计算出服务小区对应的第一路径损耗和邻居小区对应的 第二路径损耗， 因此还可以根据第一路径损耗和第二路径损耗之间的差值 进行测量判断： 若第一路径损耗高于第二路径损耗、 且二者的差值大于设 置的路损测量阈值， 则 UE对其他邻居小区进行测量， 获取 UE与其他邻居 小区基站之间的路径损耗； 或若第一路径损耗高于第二路径损耗、 二者的 差值大于设置的路损测量阈值、 且第一接收功率小于设置的功率测量阈值， 则 UE对其他邻居小区进行测量， 获取 UE与其他邻居小区基站之间的路径 损耗。 其中其他邻居小区可以包括高优先级邻居小区、 同频邻居小区和低 优先级邻居小区等， 对不同类型的邻居小区可以设置不同的功率测量阈值。
在对邻居小区进行测量后， 在进行服务小区选择和重选时， 针对 UE的 不同状态， 可以有以下处理方案。
在空闲状态下， UE对邻居小区进行测量后， 可以根据测量结果中的路 径损耗和 /或接收功率就可以进行服务小区选择和重选。 UE根据路径损耗和 /或接收功率进行服务小区选择和重选的方法包括以下几种情况： 1 )若所 述路径损耗小于设置的路损重选阈值， 则用户设备根据所述接收功率进行 服务小区选择和重选； 2 )或若所述接收功率大于设置的功率重选阈值， 则 用户设备根据所述路径损耗进行服务小区选择和重选； 3 )或若所述路径损 耗小于设置的路损重选阈值、 且接收功率大于设置的功率重选阈值， 则用 户设备根据所述接收功率和 /或所述路径损耗进行服务小区选择和重选。
其中， 对于上述第二种情况， 即接收功率满足设定的功率重选阈值， UE根据路径损耗进行服务小区选择和重选的方法， 可以采取路损高低法和 优先级法等。 其中路损高低法为： 当接收功率大于某值后， 按照路径损耗 从低到高的顺序， 选择路径损耗最低的小区作为 UE的服务小区。 优先级法 为： 若高优先级小区的路径损耗小于设定的重选阈值， 则选择高优先级的 小区；若同优先级小区的路径损耗小于设定的重选阈值， 按照路径损耗从低 到高的准则进行选择； 若低优先级小区的路径损耗小于设定的重选阈值， 且没有合适的高优先级和同优先级小区， 当服务小区的路径损耗大于设定 的阈值时， 则选择低优先级的小区。 其中对不同优先级的小区可以设定不 同的重选阈值。
在上述第一种情况， 即路径损耗小于设置的路损重选阈值， UE根据所 述接收功率进行服务小区选择和重选的方法中， 也可以采用接收功率从高 到低的顺序进行选择， 或者根据上述的优先级法， 以接收功率和小区优先 级高低进行选择。 此外， 对于上述第三种情况， 即路径损耗小于设置的路 损重选阈值、 且接收功率大于设置的功率重选阈值， 还可以根据路径损耗 从低到高的顺序、 接收功率从高到低的顺序， 或根据小区优先级高低等准 则进行选择。
在激活状态下， UE对邻居小区进行测量后， 可以判断是否将向服务小 区基站上报测量报告， 由服务小区基站决定是否进行服务小区切换。 其中， UE可以根据路径损耗和 /或接收功率判断是否满足上报准则，从而上报测量 报告， 包括以下方法：
方法一， 根据用户设备与小区基站之间的路径损耗判断是否向服务小 区基站上报第一测量报告， 所述第一测量报告中包括满足上报条件的小区 对应的路径损耗。
UE根据路径损耗判断是否上报测量报告可以包括： 根据用户设备与服 务小区基站之间的第一路径损耗， 判断是否向服务小区基站上报第一测量 报告， 该第一测量报告中包括该第一路径损耗； 或根据用户设备与邻居小 区基站之间的第二路径损耗， 判断是否向服务小区基站上报第一测量报告， 该第一测量报告中包括该第二路径损耗； 或根据不同接入方式的邻居小区 基站之间的路径损耗， 判断是否向服务小区基站上报第一测量报告， 该第 一测量报告中包括该用户设备与不同接入方式的邻居小区基站之间的路径 损耗。 上述的上报方法中可以根据路径损耗设置上报事件， 该上报事件可 以与根据功率损耗的上报事件类似， 如采用 "C1 " - "C5，，、 "Dl "、 "D2" 等 分别代表不同的上报事件： "C1 "代表 UE与服务小区基站之间的路径损耗 A 小于一个上报阈值时， 上报 A; "C2"代表 UE与服务小区基站之间的路径损 耗 A大于一个上报阈值时， 上报 A; "C 3"代表 UE与邻居小区基站之间的路 径损耗 B比 UE与服务小区基站之间的路径损耗 A小一个上报阈值时， 上报 B; "C4" 代表 UE与邻居小区基站之间的路径损耗 B小于一个上报阈值时， 上报 B; "C5 "代表 UE与服务小区基站之间的路径损耗 A大于一个上报阈值 1 ,且 UE与邻居小区基站之间的路径损耗 B小于一个上报阈值 2时，上报 B;
"D1 "代表 UE与不同接入方式的邻居小区基站之间的路径损耗 C小于一个 上报阈值时， 上报 C; "D2"代表 UE与服务小区基站之间的路径损耗 A大于 一个上报阈值 3 , 且 UE与不同接入方式的邻居小区基站之间的路径损耗 C 小于一个上报阈值 4时， 上报 C等。 其中第一测量报告中还可以包括满足 上报条件的小区对应的接收功率。
方法二， 根据小区基站的接收功率判断是否向服务小区基站上报第二 测量报告， 所述第二测量报告中包括满足上报条件的小区对应的路径损耗。
UE采用根据接收功率设置的上报事件进行上报， 在上报的第二测量报 告不只可以包括满足上报条件的小区基站的接收功率， 还可以包括满足上 报条件的小区对应的路径损耗， 或者同时包括满足上报条件的小区基站对 应的路径损耗和接收功率。
方法三， 根据用户设备与小区基站之间的路径损耗和小区基站的接收 功率判断是否向服务小区基站上报第三测量报告， 所述第三测量报告中包 括满足上报条件的小区对应的路径损耗。
UE将根据小区对应的接收功率和路径损耗的共同作为上报事件的设置 的参数， 例如在上报事件中， 可以在设置接收功率的满足上报条件的同时， 设置路径损耗需要满足的上报条件。 在上报的第三测量报告中也可以包括 满足上报条件的小区对应的接收功率和 /或路径损耗等信息。
在激活状态下， UE要更换服务小区， 将测量结果上报给服务小区基站 后， 服务小区基站可以从 UE上报的测量报告中获取满足上报条件的路径损 耗或接收功率等信息。 然后服务小区基站根据其获取的路径损耗、 接收功 率或从网络侧获取的 RRM等信息判断是否为 UE进行服务小区的切换， 并确 定需要切换的目标小区等信息。 服务小区基站进行切换判断时， 可以采用 UE空闲状态下进行服务小区选择和重选类似的方法。 例如： 将将路径损耗 满足设置值、 且接收功率最强的目标小区切换为 UE的服务小区， 或者将接 收功率满足设置值、 且路径损耗最小的目标小区切换为 UE的服务小区等， 可以根据实际情况具体设定切换判断的准则， 在此不作限定。
其中， 服务小区基站可以直接从 UE上报的测量报告中获取路径损耗， 也可以根据 UE上报的接收功率计算路径损耗。 当小区基站不在空口广播其 发射功率水平、 发射功率级别或发射功率相关的编码等表示该基站发射功 率的信息时， UE不能获取小区基站的发射功率， 因此不能计算出路径损耗， 服务小区基站需要通过网络之间的接口， 例如基站之间的 X2口或者基站与 核心网之间的 S1口， 获取小区基站的发射功率。 然后服务小区基站接收 UE 测量和上报的小区基站的接收功率， 再计算出 UE与小区基站之间的路径损 耗， 根据这些路径损耗、 接收功率或从网络侧获取的 RRM等信息判断是否 对 UE进行服务小区切换的操作。
本实施例将 UE与小区基站之间的路径损耗作为测量、 上报或切换的判 断依据， 使选择的 UE的服务小区更为合适， 降低了由于服务小区选择不当 而造成的对邻居小区的干扰， 减少了网络系统内不必要的干扰、 提高了系 统的吞吐量。
图 3为本发明网络小区选择方法第二实施例的流程图， 如图 3所示， 以 UE 同时处于宏小区 （Macro Cel l )和 敫小区 （Pico Cel l ) 中小区选 择方法为例进行说明。 其中假设宏小区为 UE 的服务小区， 微微小区为 UE 的邻居小区。 该网络小区选择方法包括以下步骤：
步骤 201、 宏小区和微微 d、区基站广播各自的发射功率。
其中， UE的服务小区为宏小区， 宏小区基站可以只广播自己的发射功 率， 也可以广播微微小区基站的发射功率。 此时 UE可以只获取宏小区基站 的发射功率， 也可以同时获取微微小区基站的发射功率。
步骤 202、 UE获取基站的接收功率。
UE可以只获取宏小区基站的接收功率， 也可以同时获取微微小区基站 的接收功率。
步骤 203、 UE计算出 UE与基站之间的路径损耗。
UE可以计算出 UE与宏小区基站之间的路径损耗 LP_ 1 , 或同时计算出 UE与微微'〗、区基站之间的路径损耗 LP _ 2。
步骤 204、 UE判断是否需要启动对邻居小区的测量。
UE可以根据路径损耗判断是否启动对邻居小区的测量； 或根据路径损 耗和接收功率判断是否启动对邻居小区的测量。
例如： 当 LP _ 1大于测量阈值时， 启动对微微小区的测量， 以获取微微 小区基站的接收功率或 LP_ 2 ; 或
当 LP _ 1大于测量阈值、 且宏小区基站的接收功率小于测量阈值时， 启 动对微微小区的测量， 以获取微微小区基站的接收功率或 LP_ 2 ; 或
当 LP _ 1大于 LP_ 2、且二者的差值大于设定的测量阈值时， 启动对其他 邻居小区的测量， 以获取其他邻居小区对应的接收功率或路径损耗； 或 当 LP _ 1大于 LP_ 2、二者的差值大于设定的测量阈值、且宏小区基站的 接收功率小于测量阈值时， 启动对其他邻居小区的测量， 以获取其他邻居 小区对应的接收功率或路径损耗。
步骤 205、 若测量， 则根据测量结果为 UE选择服务小区。
在空闲状态下， UE根据测量结果进行服务小区选择和重选。 若测量结果 中包括宏小区、 微微小区和其他邻居小区基站的发射、 接收功率和路径损耗 等信息， 则可以按照以下方法进行服务小区选择和重选： 若路径损耗小于设 置的^员重选阈值， 则 UE根据接收功率进行服务小区选择和重选。 例如： 微 微小区和其他邻居小区对应的路径损耗小于设置的路损重选阈值， 且微微小 区基站的接收功率较大， 则 UE选择微微小区作为服务小区。 还可以按照以下 方法进行服务小区选择和重选： 若接收功率大于设置的功率重选阈值， 则 UE 根据路径损耗进行服务小区选择和重选； 或若路径损耗小于设置的路损重选 阈值、 且接收功率大于设置的功率重选阈值则 UE根据接收功率和 /或路径损 耗进行服务小区选择和重选。 例如： 宏小区、 微微小区基站的接收功率大于 设定的功率重选阈值， 且微微小区对应的路径损耗较低， 则 UE选择微微小 区作为服务小区。 UE也可以在满足功率和路损重选阈值的小区中， 按照优 先级进行选择。
在激活状态下， 则需要包括以下步骤： UE根据测量结果判断是否向宏 小区基站上报测量报告； 若上报测量报告， 则由宏小区基站根据该测量报 告判断是否进行服务小区切换。 其中 UE判断是否向宏小区基站上报测量报 告的方法具体包括以路径损耗作为上报依据， 或以接收功率作为上报依据， 测量报告中包括满足上报条件的小区对应的路径损耗或接收功率。 UE以路 径损耗作为上报依据时， 可以采用和接收功率不同的上报事件设置， 设置 一套和接收功率类似的事件， 如采用 "C1" - "C5"、 "Dl"、 "D2" 等分别代 表不同的上报事件： "Cl，，代表 LP_1小于一个上报阈值时，上报 LP_1; "C2" 代表 LP_1大于一个上报阈值时， 上报 LP_1; "C3" 代表 LP_2比 LP_1小一 个上报阈值时，上报 LP_2; "C4"代表 LP_2小于一个上报阈值时，上报 LP_2;
"C5" 代表 LP_1 大于一个上报阈值 1, 且 LP_2—个上报阈值 2时， 上报 LP_2; "D1" 代表 UE与不同接入方式的邻居小区基站之间的路径损耗 LP_ 3 小于一个上报阈值时， 上报 LP_3; "D2" 代表 LP_1 大于一个上报阈值 3, 且 LP_3小于一个上报阈值 4时，上报 LP_3等。 UE采用 "C1" _ "C5"、 "Dl"、
"D2" 作为上报的条件， 将满足条件的小区对应的路径损耗和接收功率上 报给宏小区基站。 上述的上报阈值根据实际情况设定， 可以相同， 也可以 不同。 然后宏小区基站根据测量报告中的接收功率、 LP_1、 LP_2或 LP_3等 信息以及 RRM算法判断是否需要切换服务小区， 如果不需要切换则 UE继续 以宏小区作为服务小区， 而若需要切换则 UE以微微小区或其他邻居小区作 为服务小区。 例如， 当宏小区发射功率比微微小区大 16dB, 宏小区接收功 率比微微小区大 6dB, 但由于此时 LP_1比 LP_2大 10dB, 若设置的 LP_1比 LP_2大 5dB就启动测量。 则 UE需要启动测量， 此时可能会测量到其他邻居 小区对应的路径损耗和接收功率， 若上报事件为 "C3": 服务小区比邻居小 区对应的路径损耗大 5dB 时， 上报邻居小区路径损耗或接收功率。 则此时 UE上报 LP_2, 同时也可上报微微小区基站的接收功率。 若其他邻居小区对 应的路径损耗 LP_3也满足 "C3", 则 UE上报 LP_2, 同时也可上报其他邻居 小区基站的接收功率。 则宏小区基站可以将 UE切换到微微小区上。 切换后 UE可以通过微微小区进行服务， 且不会对宏小区造成不必要的干扰。
在微微小区基站不在空口广播其发射功率水平、 发射功率级别或发射 功率相关的编码等可以表示其发射功率的情况下， 宏小区基站获取小区路 径损耗的方法有所不同。 在这种情况下， 由于 UE不能通过广播获取微微小 区基站的发射功率， 不能计算出路径损耗， 因此 UE在上报给宏小区基站的 测量报告中也没有微微小区基站的发射功率和路径损耗， 宏小区基站可以 通过基站之间的 X2 口或者基站与核心网之间的 S1 口获取微微小区基站的 发射功率， 并接收 UE上报的宏小区和微微小区基站的接收功率。 然后宏小 区基站根据该发射功率和接收功率计算 LP_1和 LP_2后， 根据接收功率、 LP-1和 LP_2等信息以及 RRM算法决定是否需要切换到其他的小区，并得出 切换的目标小区， 再将 UE切换到该目标小区上。
本实施例采用 UE与小区基站之间的路径损耗作为测量、 上报、 切换的 判断依据， 使选择的 UE的服务小区更为合适， 减少了由于服务小区选择不 当而产生的干扰， 提高了系统的吞吐量。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机 可读取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储介质包括： R0M、 RAM, 磁碟或者光盘等各种可以存储程序代 码的介质。
图 4为本发明用户设备第一实施例的示意图， 如图 4所示该用户设备 包括第一获取模块 1和选择模块 2。其中第一获取模块 1用于获取用户设备 与小区基站之间的路径损耗； 选择模块 2 用于根据该路径损耗为该用户设 备选择服务小区。
具体地， UE的第一获取模块 1获取可以获取小区基站的发射功率、 接 收功率， 根据发射功率、 接收功率计算出 UE与小区基站之间的路径损耗， 选择模块 2根据该路径损耗为 UE选择服务小区。在空闲状态下， UE可以根 据该路径损耗判断是否对邻居小区进行测量， 若测量， 则根据测量结果进 行服务小区选择和重选。 在激活状态下， UE可以根据该路径损耗判断是否 对邻居小区进行测量， 若测量， 则根据测量结果判断是否向服务小区基站 上报测量报告， 若上报测量报告， 则由服务小区基站根据该测量报告判断 是否进行服务小区切换。
本实施例 UE的第一获取模块获取 UE与小区基站之间的路径损耗， 以 该路径损耗为判断依据， 判断是否对进行测量、 上报等操作， 选择模块为 UE选择合适的服务小区， 降低了由于服务小区选择不当而对邻居小区造成 的干扰， 从而减少了网络系统内的干扰、 提高了系统的吞吐量。
图 5为本发明用户设备第二实施例的示意图， 如图 5所示， 在本发明 用户设备第二实施例的基础上， 第一获取模块 1可以包括第一获取单元 1 1 和第二获取单元 12。其中第一获取单元 11用于获取小区基站的发射功率和 接收功率； 第二获取单元 12用于根据该发射功率和接收功率获取用户设备 与小区基站之间的路径损耗。 选择模块 2可以包括判断单元 21和测量单元 22。 其中判断单元 21用于根据路径损耗判断是否指示测量单元 22对邻居 小区进行测量， 或根据所述路径损耗和所述接收功率判断是否指示测量单 元 22对邻居小区进行测量； 测量单元 22用于根据判断单元 21的指示对邻 居小区进行测量。 其中判断单元 21可以包括： 第一判断子单元、 第二判断 子单元、 第三判断子单元和第四判断子单元中的任意一项或多项， 第一判 断子单元用于若用户设备与服务小区基站之间的第一路径损耗大于设置的 路损测量阈值， 则指示测量单元 22对邻居小区进行测量； 第二判断子单元 用于若用户设备与服务小区基站之间的第一路径损耗高于用户设备与邻居 小区基站之间的第二路径损耗、 且二者的差值大于设置的路损测量阈值， 则指示测量单元 22对其他邻居小区进行测量； 第三判断子单元用于若用户 设备与服务小区基站之间的第一路径损耗大于设置的路损测量阈值、 且所 述服务小区基站的第一接收功率小于设置的功率测量阈值， 则指示测量单 元 22对邻居小区进行测量； 第四判断子单元用于若用户设备与服务小区基 站之间的第一路径损耗高于用户设备与邻居小区基站之间的第二路径损 耗、 二者的差值大于设置的路损测量阈值、 且该服务小区基站的第一接收 功率小于设置的功率测量阈值， 则指示测量单元 22对其他邻居小区进行测 量。
进一步地， 选择模块 2还可以包括选择单元 23和 /或上报单元 24。 其 中选择单元 23用于根据测量单元 22的测量结果判断是否进行服务小区选 择和重选； 上报单元 24用于根据测量单元 22的测量结果判断是否向服务 小区基站上报测量报告。 选择单元 23可以包括中的第一选择子单元、 第二 选择子单元和第三选择子单元中的任意一项或多项。 其中， 第一选择子单 元用于若所述路径损耗小于设置的路损重选阈值， 则用户设备根据所述接 收功率进行服务小区选择和重选； 第二选择子单元用于若所述接收功率大 于设置的功率重选阈值， 则用户设备根据所述路径损耗进行服务小区选择 和重选； 第三选择子单元用于若所述路径损耗小于设置的路损重选阈值、 且接收功率大于设置的功率重选阈值， 则用户设备根据所述接收功率和 /或 所述路径损耗进行服务小区选择和重选。 上报单元 24可以包括第一上报子 单元、 第二上报子单元和第三上报子单元中的任意一项或多项。 其中， 第 一上报子单元用于根据用户设备与小区基站之间的路径损耗判断是否向服 务小区基站上报第一测量报告， 所述第一测量报告中包括满足上报条件的 小区对应的路径损耗； 第二上报子单元用于根据小区基站的接收功率判断 是否向服务小区基站上报第二测量报告， 所述第二测量报告中包括满足上 报条件的小区对应的路径损耗； 第三上报子单元用于根据用户设备与小区 基站之间的路径损耗和小区基站的接收功率判断是否向服务小区基站上报 第三测量报告， 所述第三测量报告中包括满足上报条件的小区对应的路径 损耗。
具体地， 用户设备的第一获取模块 1的第一获取单元 1 1获取小区基站 的接收功率， 若 UE通过小区基站广播已获取对应的小区基站的发射功率， 则第二获取单元 12可以根据该发射功率和接收功率计算出 UE与该小区基 站之间的路径损耗。 选择模块 2可以根据该路径损耗为 UE选择服务小区。 不管在空闲状态还是在激活状态， UE都可以通过选择模块 2中判断单元 21 和测量单元 22进行测量控制。 其中判断单元 21根据路径损耗判断， 若需 要对邻居小区进行测量， 则指示测量单元 22对邻居小区进行测量。 根据判 断标准的不同判断单元 21可以分为多个判断子单元。 其中判断单元 21根 据路径损耗判断是否对邻居小区进行测量包括： 若第一路径损耗大于设置 的路损测量阈值，则第二判断子单元指示测量单元 22对邻居小区进行测量， 第一判断子单元指示测量单元 22对邻居小区进行测量， 以获取邻居小区基 站的接收功率， 或获取 UE与该邻居小区基站之间的第二路径损耗； 或若第 一路径损耗高于的第二路径损耗、 且二者的差值大于设置的路损测量阈值， 则第三判断子单元指示测量单元 22对其他邻居小区进行测量， 获取 UE与 其他邻居小区基站之间的路径损耗或其他邻居小区基站的接收功率。 判断 单元 21根据路径损耗和接收功率判断是否对邻居小区进行测量包括： 若第 一路径损耗大于设置的路损测量阈值、 且第一接收功率小于设置的功率测 量阈值， 则第三判断子单元指示测量单元 22对邻居小区进行测量， 以获取 邻居小区基站的接收功率， 或获取第二路径损耗； 或若第一路径损耗高于 第二路径损耗、 二者的差值大于设置的路损测量阈值、 且服务小区基站的 第一接收功率小于设置的功率测量阈值， 则第四判断子单元指示测量单元
22对其他邻居小区进行测量，获取 UE与其他邻居小区基站之间的路径损耗 或其他邻居小区基站的接收功率。
在空闲状态下， UE测量后， 选择单元 23根据测量单元 22的测量结果 判断是否进行服务小区选择和重选。 当 UE和小区基站之间的路径损耗小于 设置的路损重选阈值时， 第一选择子单元可以根据接收功率进行服务小区 选择和重选； 当小区基站的接收功率大于设置的功率重选阈值时， 第二选 择子单元可以根据 UE 和小区基站之间的路径损耗进行服务小区选择和重 选； 当 UE和小区基站之间的路径损耗小于设置的路损重选阈值、 且小区基 站的接收功率大于设置的功率重选阈值时， 第三选择子单元可以根据接收 功率或路径损耗， 也可以同时根据接收功率和路径损耗进行服务小区选择 和重选。 其中判断单元 21也可以根据接收功率判断是否对邻居小区进行测 量后， 如果需要测量则指示测量单元 22对邻居小区进行测量， 然后选择单 元 2 3再根据测量结果中的路径损耗判断是否进行服务小区选择和重选。 上 述的 UE根据测量结果进行服务小区选择和重选的具体方法可以参照本发明 网络小区选择方法第一实施例中 UE进行服务小区选择和重选的内容， 再此 不再叙述。
在激活状态下， UE测量后， 上报单元 24根据测量单元 22的测量结果 判断是否向服务小区基站上报测量报告。 其中第一上报子单元根据 UE和小 区基站之间的路径损耗判断是否向服务小区基站上报第一测量报告， 该第 一测量报告中包括满足上报条件的小区对应的路径损耗。 第一上报子单元 以 UE和小区基站之间的路径损耗作为上报依据的判断方法， 可以参考本发 明网络小区选择方法第一实施例中的描述。 第二上报子单元可以根据接收 功率判断是否向服务小区基站上报第二测量报告， 该第二测量报告中包括 满足上报条件的小区对应的路径损耗。 第三上报子单元可以同时根据路径 损耗和接收功率判断是否向服务小区基站上报第三测量报告， 该第三测量 报告中可以包括满足上报条件的小区对应的路径损耗。 其中， 第一测量报 告、 第二测量报告和第三测量报告的任意一个或多个中也可以包括满足上 报条件的小区对应的接收功率。 其中， 判断单元 21也可以根据接收功率判 断是否对邻居小区进行测量后， 如果需要测量则指示测量单元 22对邻居小 区进行测量， 然后上报单元 24再根据测量结果中的路径损耗判断是否向服 务小区基站上报测量报告。 基站则根据 UE上报的测量报告中的接收功率、 路径损耗或从网络侧获取的 RRM等信息进行判断， 以确定是否需要切换服 务小区， 如何切换以及切换的目标小区等信息。
本实施例 UE的第一获取模块获取 UE与小区基站之间的路径损耗， 以 该路径损耗为判断依据来指示选择模块为 UE选择合适的服务小区， 降低了 由于服务小区选择不当而对邻居小区造成的干扰， 从而减少了网络系统内 的干扰、 提高了系统的吞吐量。
图 6为本发明基站实施例的示意图， 如图 6所示， 该基站包括： 第二 获取模块 4和判断模块 5 ,其中第二获取模块 4用于获取用户设备与小区基 站之间的路径损耗； 判断模块 5 用于根据路径损耗判断是否进行服务小区 切换。
具体地， 在激活状态下， UE若要更换服务小区， 需要向网络侧的基站 上才艮测量的结果， UE可以将这些测量的结果以测量 4艮告的形式发送给基站 的第二获取模块 4。然后判断模块 5根据该测量报告以及网络侧其他的信息 进行切换判决。 进一步地， 第二获取模块 4可以包括第三获取单元和 /或第 四获取单元， 其中第三获取单元用于接收用户设备上报的测量报告， 该测 量报告中包括该用户设备与小区基站之间的路径损耗； 第四获取单元， 用 于接收用户设备上报的测量报告， 该测量报告中包括小区基站的接收功率， 根据该接收功率计算该用户设备与小区基站之间的路径损耗。 当基站接收 到的测量报告中接包括 UE与小区基站之间的路径损耗后， 第三获取单元可 以直接从该测量报告中获取 UE与小区基站之间的路径损耗。 而当小区基站 不在空口广播其发射功率水平、 发射功率级别或发射功率相关的编码等可 以表示其发射功率的信息时， 第四获取单元可以通过小区基站之间的 X2口 或基站与核心网之间的 S 1 口获取小区基站的发射功率， 同时接收 UE上报 的小区基站的接收功率， 然后根据该发射功率和接收功率计算 UE与小区基 站之间的路径损耗。 判断模块 5则根据 UE与小区基站之间的路径损耗决定 是否需要切换到其他的小区， 并得出切换的目标小区， 然后将 UE切换到该 目标小区上。
本发明基站实施例的第二获取模块获取网络中与小区基站之间的路径 损耗， 判断模块以路径损耗为判断依据进行切换判决， 将 UE切换到更为合 适的服务小区， 降低了服务小区对邻居小区造成的干扰， 从而减少了网络 系统内的干扰、 提高了系统的吞吐量。
本发明网络系统实施例包括基站， 用于获取用户设备与小区基站之间 的路径损耗； 根据该路径损耗决定是否进行服务小区切换。
具体地， 基站根据获取的 UE与小区基站之间的路径损耗以及从网络侧 获取的 RRM等信息决定是否在小区之间进行切换， 若需要进行切换， 基站 还可以得出如何进行切换， 以及切换的目标小区， 并将 UE切换到该目标小 区上。 其中基站可以从 UE上报的测量报告直接得到 UE与小区基站之间的 路径损耗， 也可以从 UE上报的测量报告中得到小区基站的发射功率、 接收 功率， 然后计算出 UE与小区基站之间的路径损耗， 还可以从 UE上报的测 量报告中得到小区基站的接收功率， 通过网络之间的接口如基站之间的 X2 口和基站与核心网之间的 S 1 口获取小区基站的发射功率， 然后计算出 UE 与小区基站之间的路径损耗。
本实施例中的用户设备和基站可以采用上述实施例中提供的用户设备 和基站， 在此不再对该网络系统中用户设备和基站的具体结构进行详细叙 述。 本实施例中， 采用 UE与小区基站之间的路径损耗作为判断依据， 决定 是否进行测量、 上报或切换， 使 UE处于合适的服务小区中， 降低由于服务 小区选择不当而对邻居小区造成的不必要的干扰， 从而减少了系统内部的 干扰， 提高了系统的吞吐量。
最后应说明的是： 以上实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解： 其依然可以对前述各实施例所记载的技术方案进行修 改， 或者对其中部分技术特征进行等同替换； 而这些修改或者替换， 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种网络小区选择方法， 其特征在于， 包括：
获取用户设备与小区基站之间的路径损耗；
根据所述路径损耗为所述用户设备选择服务小区。
2、 根据权利要求 1所述的方法， 其特征在于， 所述获取用户设备与小 区基站之间的路径损耗， 包括： 获取小区基站的发射功率和接收功率， 根 据所述发射功率和所述接收功率获取所述用户设备与小区基站之间的路径 损耗。
3、 根据权利要求 1所述的方法， 其特征在于，
所述获取用户设备与小区基站之间的路径损耗， 包括： 所述用户设备 根据服务小区基站的接收功率判断是否对邻居小区进行测量； 若测量， 则 通过测量获取所述用户设备与邻居小区基站之间的路径损耗， 或者通过测 量获取所述用户设备与邻居小区基站之间的路径损耗， 以及所述用户设备 与服务小区基站之间的路径损耗；
所述根据所述路径损耗为所述用户设备选择服务小区， 包括； 所述用 户设备根据测量结果中的所述路径损耗判断是否进行服务小区选择和重 选。
4、 根据权利要求 1所述的方法， 其特征在于， 所述根据所述路径损耗 为所述用户设备选择服务小区， 包括：
用户设备根据服务小区基站的所述路径损耗判断是否对邻居小区进行 测量、 或用户设备根据服务小区基站的所述路径损耗和接收功率判断是否 对邻居小区进行测量；
若测量， 则所述用户设备根据对所述邻居小区的测量结果， 或者根据 对所述邻居小区及服务小区的测量结果， 判断是否进行服务小区选择和重 选。
5、 根据权利要求 4所述的方法， 其特征在于， 所述测量结果中包括路 径损耗和接收功率；
所述根据测量结果判断是否进行服务小区选择和重选， 包括： 若所述邻居小区基站与服务小区基站的路径损耗均小于设置的路损重 选阈值， 则用户设备根据所述邻居小区基站的接收功率， 或者邻居小区基 站与服务小区基站的接收功率， 进行服务小区选择和重选； 或
若所述邻居小区基站与服务小区基站的接收功率均大于设置的功率重 选阈值， 则用户设备根据所述邻居小区基站的路径损耗， 或者邻居小区基 站与服务小区基站的路径损耗进行服务小区选择和重选； 或
若所述邻居小区基站与服务小区基站的路径损耗均小于设置的路损重 选阈值、 且接收功率均大于设置的功率重选阈值， 则用户设备根据所述邻 居小区基站的接收功率和 /或所述路径损耗， 或者所述邻居小区基站与服务 小区基站的接收功率和 /或所述路径损耗， 进行服务小区选择和重选。
6、 根据权利要求 5所述的方法， 其特征在于， 所述若所述邻居小区的 基站与服务小区基站的接收功率均大于设置的功率重选阈值， 则用户设备 根据所述邻居小区基站的路径损耗， 或者邻居小区基站与服务小区基站的 路径损耗进行服务小区选择和重选， 包括：
若所述邻居小区的基站与服务小区基站的接收功率均大于设置的功率 重选阈值， 则用户设备根据所述邻居小区的路径损耗从低到高的顺序或根 据小区优先级法， 进行服务小区选择和重选， 或者根据所述邻居小区基站 与服务小区基站的路径损耗从低到高的顺序或小区优先级法， 进行服务小 区选择和重选； 或
所述若所述邻居小区基站与服务小区基站的路径损耗均小于设置的路 损重选阈值、 且接收功率均大于设置的功率重选阈值， 则用户设备根据所 述邻居小区基站的接收功率和 /或所述路径损耗， 或者所述邻居小区基站与 服务小区基站的接收功率和 /或所述路径损耗， 进行服务小区选择和重选， 包括： 若所述邻居小区基站与服务小区基站的路径损耗均小于设置的路损重 选阈值、 且所述接收功率均大于设置的功率重选阈值， 则用户设备根据所 述邻居小区的路径损耗从低到高的顺序、 接收功率从高到低的顺序或小区 优先级法的任意组合， 进行服务小区选择和重选， 或者根据邻居小区基站 与服务小区基站的路径损耗从低到高的顺序、 接收功率从高到低的顺序或 小区优先级法的任意组合， 进行服务小区选择和重选。
7、 根据权利要求 1所述的方法， 其特征在于， 所述根据所述路径损耗 为所述用户设备选择服务小区， 包括：
用户设备根据所述路径损耗判断是否对邻居小区进行测量、 或用户设 备根据所述路径损耗和小区基站的接收功率判断是否对邻居小区进行测 量；
若测量， 则所述用户设备根据测量结果判断是否向服务小区基站上报 测量报告；
若上报测量报告， 则由所述服务小区基站根据所述测量报告判断是否 进行服务小区切换；
或者包括：
用户设备根据 d、区基站的接收功率判断是否对邻居小区进行测量； 若测量， 则所述用户设备根据所述测量报告中的所述路径损耗判断是 否向服务小区基站上报测量报告；
若上报测量报告， 则由所述服务小区基站根据所述测量报告判断是否 进行服务小区切换。
8、 根据权利要求 7所述的方法， 其特征在于， 所述判断是否向服务小 区基站上报测量报告，包括：
根据用户设备与小区基站之间的路径损耗判断是否向服务小区基站上 报第一测量报告， 所述第一测量报告中包括满足上报条件的小区对应的路 径损耗； 或 根据小区基站的接收功率判断是否向服务小区基站上报第二测量报 告， 所述第二测量报告中包括满足上报条件的小区对应的路径损耗； 或 根据用户设备与小区基站之间的路径损耗和小区基站的接收功率判断 是否向服务小区基站上报第三测量报告， 所述第三测量报告中包括满足上 报条件的小区对应的路径损耗。
9、 根据权利要求 8所述的方法， 其特征在于， 所述根据所述路径损耗 判断是否向服务小区基站上报第一测量报告， 所述第一测量报告中包括满 足上报条件的小区对应的路径损耗， 包括：
根据所述用户设备与服务小区基站之间的第一路径损耗， 判断是否向 服务小区基站上报所述第一测量报告， 所述第一测量报告中包括所述第一 路径损耗； 或
根据所述用户设备与邻居小区基站之间的第二路径损耗， 判断是否向 服务小区基站上报所述第一测量报告， 所述第一测量报告中包括所述第二 路径损耗； 或
根据所述用户设备与不同接入方式的邻居小区基站之间的路径损耗， 判断是否向服务小区基站上报所述第一测量报告， 所述第一测量报告中包 括所述用户设备与不同接入方式的邻居小区基站之间的路径损耗。
10、 根据权利要求 9 所述的方法， 其特征在于， 所述第一测量报告、 第二测量报告和第三测量报告任意一个或多个中还包括： 所述满足上报条 件的小区对应的接收功率。
11、 根据权利要求 3-10任意一项所述的方法， 其特征在于， 所述用户 设备根据所述路径损耗判断是否对邻居小区进行测量， 包括：
若用户设备与服务小区基站之间的第一路径损耗大于设置的路损测量 阈值， 则确定所述用户设备对邻居小区进行测量； 或
若用户设备与服务小区基站之间的第一路径损耗高于用户设备与邻居 小区基站之间的第二路径损耗、 且二者的差值大于设置的路损测量阈值， 则确定所述用户设备对其他邻居小区进行测量。
12、 根据权利要求 3-10任意一项所述的方法， 其特征在于， 所述用户 设备根据所述路径损耗和所述接收功率判断是否对邻居小区进行测量， 包 括：
若用户设备与服务小区基站之间的第一路径损耗大于设置的路损测量 阈值、 且所述服务小区基站的第一接收功率小于设置的功率测量阈值， 则 确定所述用户设备对邻居小区进行测量； 或
若用户设备与服务小区基站之间的第一路径损耗高于用户设备与邻居 小区基站之间的第二路径损耗、 二者的差值大于设置的路损测量阈值、 且 所述服务小区基站的第一接收功率小于设置的功率测量阈值， 则确定所述 用户设备对其他邻居小区进行测量。
1 3、 一种用户设备， 其特征在于， 包括：
第一获取模块， 用于获取所述用户设备与小区基站之间的路径损耗； 选择模块， 用于根据所述路径损耗为所述用户设备选择服务小区。
14、 根据权利要求 1 3所述的用户设备， 其特征在于， 所述第一获取模 块包括：
第一获取单元， 用于获取小区基站的发射功率和接收功率；
第二获取单元， 用于根据所述发射功率和所述接收功率获取所述用户 设备与小区基站之间的路径损耗。
15、 根据权利要求 1 3所述的用户设备， 其特征在于， 所述选择模块包 括：
判断单元， 用于根据所述路径损耗判断是否指示测量单元对邻居小区 进行测量， 或根据所述路径损耗和小区基站的接收功率判断是否指示测量 单元对邻居小区进行测量；
测量单元， 用于根据所述判断单元的指示对邻居小区进行测量。
16、 根据权利要求 15所述的用户设备， 其特征在于， 所述选择模块还 包括：
选择单元， 用于根据所述测量单元的测量结果判断是否进行服务小区 选择和重选； 和 /或
上报单元， 用于根据所述测量单元的测量结果判断是否向服务小区基 站上报测量报告。
17、 根据权利要求 15所述的用户设备， 其特征在于， 所述判断单元包 括以下单元的任意一项或多项：
第一判断子单元， 用于若用户设备与服务小区基站之间的第一路径损 耗大于设置的路损测量阈值， 则指示测量单元对邻居小区进行测量；
第二判断子单元， 用于若用户设备与服务小区基站之间的第一路径损 耗高于用户设备与邻居小区基站之间的第二路径损耗、 且二者的差值大于 设置的路损测量阈值， 则指示测量单元对其他邻居小区进行测量；
第三判断子单元， 用于若用户设备与服务小区基站之间的第一路径损 耗大于设置的路损测量阈值、 且所述服务小区基站的第一接收功率小于设 置的功率测量阈值， 则指示测量单元对邻居 d、区进行测量；
第四判断子单元， 用于若用户设备与服务小区基站之间的第一路径损 耗高于用户设备与邻居小区基站之间的第二路径损耗、 二者的差值大于设 置的路损测量阈值、 且所述服务小区基站的第一接收功率小于设置的功率 测量阈值， 则指示测量单元对其他邻居小区进行测量。
18、 根据权利要求 16所述的用户设备， 其特征在于， 所述选择单元包 括以下单元的任意一项或多项：
第一选择子单元， 用于若所述路径损耗小于设置的路损重选阈值， 则 用户设备根据所述接收功率进行服务小区选择和重选；
第二选择子单元， 用于若所述接收功率大于设置的功率重选阈值， 则 用户设备根据所述路径损耗进行服务小区选择和重选；
第三选择子单元， 用于若所述路径损耗小于设置的路损重选阈值、 且 接收功率大于设置的功率重选阈值， 则用户设备根据所述接收功率和 /或所 述路径损耗进行服务小区选择和重选。
19、 根据权利要求 16所述的用户设备， 其特征在于， 所述上报单元包 括以下单元的任意一项或多项：
第一上报子单元， 用于根据用户设备与小区基站之间的路径损耗判断 是否向服务小区基站上报第一测量报告， 所述第一测量报告中包括满足上 报条件的小区对应的路径损耗；
第二上报子单元， 用于根据小区基站的接收功率判断是否向服务小区 基站上报第二测量报告， 所述第二测量报告中包括满足上报条件的小区对 应的路径损耗；
第三上报子单元， 用于根据用户设备与小区基站之间的路径损耗和小 区基站的接收功率判断是否向服务小区基站上报第三测量报告， 所述第三 测量报告中包括满足上报条件的小区对应的路径损耗。
20、 一种基站， 其特征在于， 包括：
第二获取模块， 用于获取用户设备与小区基站之间的路径损耗； 判断模块， 用于根据所述路径损耗判断是否进行服务小区切换。
21、 根据权利要求 20所述的基站， 其特征在于， 所述第二获取模块包 括：
第三获取单元， 用于接收用户设备上报的测量报告， 所述测量报告中 包括所述用户设备与小区基站之间的路径损耗； 和 /或
第四获取单元， 用于接收用户设备上报的测量报告， 所述测量报告中 包括小区基站的接收功率， 根据所述接收功率获取所述用户设备与小区基 站之间的路径损耗。
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