WO2014029269A1 - 一种小区重选的方法和装置 - Google Patents

一种小区重选的方法和装置 Download PDF

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Publication number
WO2014029269A1
WO2014029269A1 PCT/CN2013/080852 CN2013080852W WO2014029269A1 WO 2014029269 A1 WO2014029269 A1 WO 2014029269A1 CN 2013080852 W CN2013080852 W CN 2013080852W WO 2014029269 A1 WO2014029269 A1 WO 2014029269A1
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Prior art keywords
frequency
intra
cell
measurement
cell reselection
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PCT/CN2013/080852
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English (en)
French (fr)
Inventor
肖述超
杨立
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中兴通讯股份有限公司
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Publication of WO2014029269A1 publication Critical patent/WO2014029269A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H04W36/008375—Determination of triggering parameters for hand-off based on historical data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method and apparatus for cell reselection in a Universal Mobile Telecommunications System (UMTS).
  • UMTS Universal Mobile Telecommunications System
  • the radio access network is composed of a plurality of radio network subsystems.
  • Each radio network subsystem includes a Radio Network Controller (RNC), a plurality of Node Bs (NodeBs), and a large number of User Equipments (UEs).
  • RNC Radio Network Controller
  • NodeBs Node Bs
  • UEs User Equipments
  • Cell reselection or handover is initiated when a UE moves from one cell to another.
  • the difference between cell reselection and handover is whether the UE and the network establish a dedicated control and data channel, that is, when the dedicated control and data channel is not established, the UE moves from one cell to another, causing cell reselection.
  • a dedicated control and data channel is established, the UE moves from one cell to another, causing a Handover.
  • Step 101 In the current serving cell, the UE receives and stores system messages from the broadcast channel of the current serving cell (SIB, System) Information Block), and obtain the neighbor cell list of the current serving cell and the threshold parameters and timers required for cell reselection from the SIB.
  • SIB System Information Block
  • Step 102 The UE periodically measures the received signal quality and strength of the current serving cell pilot signal.
  • the system message is configured with the intra- frequency measurement trigger threshold (S intrasearch ) parameter, the UE according to S intrasearcl ⁇ 'j Whether the intra-frequency measurement of the neighboring cell is performed; when the cell selection quality value (S qual ) of the serving cell is greater than the S intrasearch threshold, the UE does not perform the same-frequency measurement of the neighboring cell, and the S qual value of the serving cell is smaller than
  • the S intrasearch threshold is equal, the UE performs the same-frequency measurement on the neighboring cell, and step 103 is performed;
  • the Sq Ua corpse CPICH Ec/No-Qq Ualmin , CPICH Ec/No is the pilot signal quality of the cell,
  • Qqualmin is the minimum quality requirement level of the community
  • the UE performs the same frequency measurement on the neighboring cell without a decision.
  • Step 103 When the UE performs the same-frequency measurement on the neighboring cell, when the pilot signal strength and quality of the neighboring cell are measured to be greater than a threshold value that satisfies the camping condition, and the rank value of the neighboring cell is higher than
  • the UE uses the neighboring cell as the cell that satisfies the reselection condition, and selects the cell with the highest rank value from all the cells satisfying the reselection condition as the most suitable target reselection at the end of the intra-frequency measurement process.
  • the cell reselects to the target reselected cell when the target reselected cell remains the most suitable for the duration of the timer T rcselect .
  • the above is a rule method for measuring and reselecting neighboring cells in the terminal frequency. It can be seen from the above intra-frequency cell reselection measurement process that the S intrasearcl configuration configuration is very important. If it is set too small, it will cause the UE measurement to open lag, and the reselection will not be timely, resulting in a decrease in the access success rate. If the setting is too large, it is easy to trigger the co-frequency measurement of the neighboring cell too early, so that the reselection of the same-frequency cell is easy, but the measurement burden of the UE is increased, and the consumed UE consumes more power. It is found in the current network that the value of 81dale ( 1 1 is unreasonable, the UE power will be consumed faster, resulting in a decline in the user's battery life experience.
  • the S intrasearch parameter is statically set by the RNC and broadcasted to the UE.
  • the value of the S intrasearch parameter is generally a fixed value according to experience, which is the same for all UEs in the serving cell. In fact, the specific situation of each UE is different, such as the location, moving speed, power status, etc. in the cell. Fixed a single S intrasearch parameter value is no way to adapt to the specific situation of each UE. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a method and a device for cell reselection, which can save the power of the UE and improve the endurance of the UE.
  • a method for cell reselection according to an embodiment of the present invention where the method includes:
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during cell reselection, and performs cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • the intra-frequency measurement trigger threshold when the UE dynamically adjusts cell reselection is:
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the number of intra-frequency neighbors measured before the successful reselection and the time consumed by the measurement.
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the number of the same-frequency neighboring cells measured before the successful re-selection and the time consumed by the measurement, as follows:
  • the UE Before the UE performs the reselection of the intra-frequency cell, the UE records the number of the same-frequency neighboring cells and the time consumed by the measurement; after successfully performing the co-frequency cell reselection, the UE determines the number of the same-frequency neighboring cells and/or Whether the time consumed by the measurement exceeds a corresponding threshold, when the number of the same frequency neighboring cells is greater than the maximum number of the same frequency neighboring cells, and/or the time consumed by the measurement is greater than the maximum time threshold, Adjusting the same frequency measurement trigger threshold; when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring cells, and the time consumed by the measurement is less than the minimum time threshold, the same frequency measurement trigger threshold is adjusted upward.
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell reselection is: the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the power state.
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the state of the power state:
  • the UE is divided into different power states according to the remaining power of the UE, and the UE selects different intra-frequency measurement trigger thresholds when performing cell reselection in different power states.
  • the intra-frequency measurement trigger threshold when the UE dynamically adjusts cell reselection is:
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during cell reselection according to the state of the power, the number of co-frequency neighbors measured before the successful re-selection, and the time consumed by the measurement.
  • the UE reports the same-frequency neighboring cell measured before the successful reselection according to the state of charge.
  • the number of measurements and the time consumed by the measurement dynamically adjust the same frequency measurement trigger threshold for cell reselection, which is:
  • the UE is divided into different power states according to its own remaining power, and selects different intra-frequency measurement trigger thresholds, maximum same-frequency neighboring cell thresholds, maximum time thresholds, and minimum intra-frequency neighboring thresholds in different power states.
  • the minimum time threshold is used to record the number of co-frequency neighbors that have been measured and the time consumed by the measurement before the co-frequency cell reselection succeeds. After the co-frequency cell reselection is successfully performed, the number of the same-frequency neighboring cells is determined.
  • the same frequency measurement trigger threshold corresponding to the current power state downward when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring cells, and the time consumed by the measurement is less than the minimum time threshold, the upward adjustment is performed.
  • the same frequency measurement trigger threshold corresponding to the current state of charge when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring cells, and the time consumed by the measurement is less than the minimum time threshold.
  • An apparatus for reselecting a cell where the apparatus includes: a dynamic adjustment module and a cell reselection module, where
  • the dynamic adjustment module is configured to dynamically adjust the same frequency measurement trigger threshold when the cell is reselected, and notify the cell reselection module of the adjusted intra-frequency measurement trigger threshold;
  • the cell reselection module is configured to perform cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • the dynamic adjustment module is configured to dynamically adjust the intra-frequency measurement trigger threshold during cell reselection according to the number of co-frequency neighbors measured before the successful re-selection and the time consumed by the measurement.
  • the dynamic adjustment module is configured to dynamically adjust an intra-frequency measurement trigger threshold when the cell is reselected according to the power state.
  • the dynamic adjustment module is configured to dynamically adjust the intra-frequency measurement trigger threshold during cell reselection according to the state of the power, the number of co-frequency neighbors measured before the successful re-selection, and the time consumed by the measurement.
  • the embodiment of the invention provides a method and a device for reselecting a cell.
  • the UE dynamically adjusts the same frequency measurement trigger threshold during cell reselection, and performs cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • each UE can have the same frequency measurement trigger threshold according to its own situation, more reasonably perform intra-frequency measurement of the neighboring cell, save the UE power, and improve the UE's battery life.
  • FIG. 1 is a schematic flowchart of a method for implementing cell reselection according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an apparatus for implementing cell reselection according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for implementing cell reselection according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for implementing cell reselection according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of a method for implementing cell reselection according to Embodiment 3 of the present invention. detailed description
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during cell reselection, and performs cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • the embodiment of the present invention implements a method for cell reselection. As shown in FIG. 1, the method includes the following steps:
  • Step 201 The UE dynamically adjusts an intra-frequency measurement trigger threshold when the cell is reselected.
  • the step may be: the UE dynamically adjusts the same frequency measurement trigger threshold when the cell is reselected according to the number of the same frequency neighboring cells measured before the successful reselection and the time consumed by the measurement;
  • the UE records the number of the same-frequency neighboring cells that have been measured and the time consumed by the measurement; after successfully performing the same-frequency cell reselection, the UE determines the same-frequency neighboring cell. Whether the number of times and/or the time consumed by the measurement exceeds a corresponding threshold, when the number of the same frequency neighboring cells is greater than the maximum number of the same frequency neighboring cells, and/or the time consumed by the measurement is greater than the maximum time gate Adjusting the same frequency measurement trigger threshold downwards; when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring cells, and the time consumed by the measurement is less than the minimum time threshold, the same frequency measurement trigger is adjusted upward. Threshold The statistical starting point of the time consumed by the measurement is that the UE just successfully accesses the source serving cell, and the end point is reselected to a new serving cell;
  • the maximum intra-frequency neighboring cell threshold, the maximum time threshold, the minimum intra-frequency neighboring cell threshold, and the minimum time threshold may be predefined or configured; the pre-defined is to give the maximum intra-frequency neighboring cell in the protocol.
  • the configuration is that the RNC uses the system message to set the maximum number of neighbors in the same frequency, the maximum time threshold, and the minimum intra-frequency neighbor.
  • the value of the threshold and the minimum time threshold are configured to the UE; the amplitude of the downward adjustment and the amplitude of the upward adjustment may also be predefined or configured; further, after adjusting the trigger threshold of the same frequency measurement, the UE deletes the same frequency cell.
  • the step may also be: the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the state of the power;
  • the UE is divided into different power states according to its remaining power, such as: good (remaining power > 50%), general (50% > remaining battery > 20%), alarm (remaining power ⁇ 20%); UE Select different intra-frequency measurement trigger thresholds when performing cell reselection in different power states; here, the same-frequency measurement trigger threshold selected when the power state is good is greater than the same-frequency measurement trigger threshold selected when the power state is normal, the state of charge The same frequency measurement trigger threshold selected for the general time is greater than the same frequency measurement trigger threshold selected when the power state is the alarm;
  • the above battery state interval value can be adjusted as needed.
  • the step may further be: the UE dynamically adjusts the intra-frequency measurement trigger threshold when the cell is reselected according to the state of the power, the number of the same-frequency neighboring cells measured before the successful re-selection, and the time consumed by the measurement;
  • the UE is divided into different power states according to its remaining power, such as: good (remaining power > 50%), general (50% > remaining battery > 20%), and alarm (remaining power ⁇ 20%); Different power states select different intra-frequency measurement trigger thresholds, maximum intra-frequency neighboring thresholds, maximum time thresholds, minimum intra-frequency neighboring thresholds, and minimum time thresholds, and reselect in the same-frequency cell. Before the success occurs, the number of the same-frequency neighboring cells and the time consumed by the measurement are recorded. After the co-frequency cell reselection is successfully performed, the number of the same-frequency neighboring cells and/or the time consumed by the measurement are determined.
  • the current power state is adjusted downward.
  • the frequency measurement trigger threshold when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring threshold, and the time consumed by the measurement is less than the minimum time threshold, the same frequency measurement trigger threshold corresponding to the current power state is adjusted upward .
  • Step 202 The UE performs cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • the UE determines whether to perform intra-frequency measurement of the neighboring cell according to the adjusted intra-frequency measurement trigger threshold.
  • the Sq Ual value of the serving cell is greater than the intra- frequency measurement trigger threshold, the UE does not perform the same-frequency measurement of the neighboring cell.
  • the s qual value of the serving cell is less than or equal to the same frequency measurement trigger threshold,
  • the UE performs the same frequency measurement on the neighboring cell
  • the Sq Ua corpse CPICH Ec/No-Qq Ualmin , CPICH Ec/No is the pilot signal quality of the cell
  • Qqualmin is the minimum quality requirement level of the community
  • the UE When the UE performs the intra-frequency measurement on the neighboring cell, when the pilot signal strength and quality of the neighboring cell are both greater than the threshold value that satisfies the camping condition, and the rank value of the neighboring cell is higher than the serving cell
  • the UE uses the neighboring cell as the cell that satisfies the reselection condition, and selects the cell with the highest rank value from all the cells satisfying the reselection condition as the most suitable target reselection cell when the intra-frequency measurement process ends.
  • the target reselected cell remains the most suitable for the duration of the timer T rcselect , the UE reselects to the target reselected cell.
  • the embodiment of the present invention further provides a device for cell reselection, where the device is located in the UE.
  • the device includes: a dynamic adjustment module 11 and a cell reselection module 12, where
  • the dynamic adjustment module 11 is configured to dynamically adjust the intra-frequency measurement trigger threshold when the cell is reselected, and notify the cell reselection module 12 of the adjusted intra-frequency measurement trigger threshold;
  • the cell reselection module 12 is configured to perform cell reselection according to the adjusted intra-frequency measurement trigger threshold.
  • the dynamic adjustment module 11 is specifically configured to dynamically adjust the same frequency measurement trigger threshold when the cell is reselected according to the number of the same frequency neighboring cells measured before the successful reselection and the time consumed by the measurement;
  • the dynamic adjustment module 11 records the number of the same-frequency neighboring cells that have been measured and the time consumed by the measurement; after successfully performing the same-frequency cell reselection, determining the same Whether the number of the frequency neighboring cells and/or the time consumed by the measurement exceeds a corresponding threshold, when the number of the same frequency neighboring cells is greater than the maximum number of the same frequency neighboring cells, and/or the time consumed by the measurement
  • the maximum time threshold is greater than the maximum time threshold
  • the same frequency measurement trigger threshold is adjusted downward; when the number of the same frequency neighboring cells is less than the minimum number of the same frequency neighboring cells, and the time consumed by the measurement is less than the minimum time threshold, the upward adjustment is performed.
  • Same frequency measurement trigger threshold
  • the dynamic adjustment module 11 is specifically configured to dynamically adjust the intra-frequency measurement trigger threshold when the cell is reselected according to the power state;
  • the dynamic adjustment module 11 is divided into different power states according to the remaining power of the UE where the UE is located, such as: good (remaining power > 50%), general (50% > remaining battery > 20%), and alarm (remaining The power consumption is less than 20%; the cell reselection module 12 is notified of different intra-frequency measurement trigger thresholds when performing cell reselection in different power states;
  • the dynamic adjustment module 11 is specifically configured to dynamically adjust the intra-frequency measurement trigger threshold when the cell is reselected according to the state of the power, the number of the same-frequency neighboring cells measured before the successful re-selection, and the time consumed by the measurement;
  • the dynamic adjustment module 11 is divided into different power states according to the remaining power of the UE where the UE is located, such as: good (remaining power > 50%), general (50% > remaining battery > 20%), and alarm (remaining Power ⁇ 20%); select different intra-frequency measurement trigger threshold, maximum intra-frequency neighbor threshold, maximum time threshold, minimum intra-frequency neighbor threshold and minimum time threshold in different power states, in the same-frequency cell Record the same-frequency neighbors that have been measured before the re-election succeeds The number of times and the time consumed by the measurement, after successfully performing the same-frequency cell reselection, determining whether the number of the same-frequency neighboring cells and/or the time consumed by the measurement exceeds a corresponding threshold, when the same-frequency neighbor If the number of zones is greater than the maximum number of co-frequency neighbors corresponding to the current state of charge, and/or the time consumed by the measurement is greater than the maximum time threshold corresponding to the current state of charge, adjust the same-frequency measurement corresponding to the current state of charge downward.
  • Triggering threshold when the number of the same-frequency neighboring cells is less than the minimum number of the same-frequency neighboring cells corresponding to the current state of charge, and the time consumed by the measurement is less than the minimum time threshold corresponding to the current state of charge, the current power is adjusted upward.
  • the same frequency measurement trigger threshold corresponding to the status Example 1
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during cell reselection according to the number of co-frequency neighboring cells measured before the successful re-selection and the time consumed by the measurement, and the method for implementing cell re-selection is as shown in FIG. As shown, it includes the following steps:
  • Step 301 The UE receives the SIB message from the broadcast channel, and obtains the neighbor cell list of the serving cell and the parameters required for the cell reselection from the SIB, including: the intra- frequency measurement trigger threshold S intrasearch and the maximum intra- frequency neighboring cell number Threshold N intrasearch1 , maximum time threshold T intrasearch1 , minimum intra- frequency neighboring cell threshold N intrasearch2 , minimum time threshold T intrasearch2 and timer duration T rcselect ;
  • Step 302 The UE periodically measures the quality and strength of the received signal of the current serving cell pilot signal.
  • Step 303 the UE determines whether the S qual value of the serving cell is greater than the S intrasearch threshold, when greater than, the UE does not perform the same frequency measurement of the neighboring cell, the process ends; when not greater than, step 304 is performed;
  • CPICH Ec/No-Qq Ualmin is the pilot signal quality of the cell, (3 ⁇ 4 ⁇ beaut ⁇ is the minimum quality requirement level of the cell;
  • Step 304 The UE performs intra-frequency measurement on the same-frequency neighboring cell in the neighboring cell list.
  • Step 305 The UE records the measured number of co-frequency neighboring cells and the time consumed by the measurement.
  • Step 306 The UE performs cell reselection.
  • the UE when the UE measures the intra-frequency neighboring cell, the pilot signal strength and quality of the neighboring cell are measured to be greater than a threshold value that satisfies the camping condition, and the neighboring cell has a higher rank value than the service.
  • the UE uses the neighboring cell as a cell that satisfies the reselection condition, and selects the cell with the highest rank value from all the cells satisfying the reselection condition as the most suitable target reselection cell at the end of the intra-frequency measurement process.
  • the target reselection cell remains the most suitable for the duration of the timer T rcselect , the UE reselects to the target reselection cell;
  • Step 307 after successfully performing the same-frequency cell reselection, the UE determines whether the number of the same-frequency neighboring cells is greater than the maximum-frequency neighboring cell number threshold N intrasearch1 , if it is greater than, step 308 is performed; otherwise, step 309 is performed;
  • Step 308 The UE automatically adjusts S intrasearch to a new intra- frequency measurement trigger threshold (S intrasearch ( new ) ), and performs step 313 ;
  • Si n t raS earch ( new ) S intra ch - delta
  • delta is a predefined amplitude; this step is because the UE excessively performs unnecessary measurement of the same frequency neighboring cell, so the same frequency measurement is to be reduced.
  • the threshold is triggered, making reselection difficult and reducing unnecessary intra-frequency neighbor measurements.
  • Step 309 the UE determines whether the time consumed by the measurement is greater than the maximum time threshold T intrasearch1 , when it is greater than, step 310 is performed, otherwise step 31 1 is performed;
  • Step 313 after the reselection is completed, the UE clears the number of co-frequency neighboring cells recorded in the same-frequency cell reselection and the time consumed by the measurement.
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during cell reselection according to the remaining power state, and the method for implementing cell reselection is as shown in FIG. 4, and includes the following steps:
  • Step 401 The UE receives the SIB message from the broadcast channel, and obtains the neighbor cell list of the service cell and the parameters required for cell reselection from the SIB, including: a normal intra-frequency measurement trigger threshold.
  • Sintrasearch ⁇ parameters such as power-synchronization measurement trigger threshold S intrasearch (battery saving) and timer duration T rcselect , the s intrasearch (battery saving ) is smaller than the value of s intrasearch ;
  • Step 402 The UE divides into different power states according to the remaining battery information of the battery, including: good (remaining power > 50%), general (50% > remaining power > 20%), and alarm (remaining power ⁇ 20%);
  • Step 403 When the power state is good, the UE triggers the intra-frequency measurement trigger threshold when the cell is reselected as Si n t ras earch;
  • Step 404 When the power state is normal, the same-frequency measurement trigger threshold selected by the UE during cell reselection is an average value of Sintrasearch and Si ntrasearc h (battery saving);
  • Step 405 When the power state is an alarm, the UE triggers the intra-frequency measurement trigger threshold when the cell is reselected as Sintrasearch (battery saving).
  • s intrasearch battery saving
  • S intrasearch battery saving
  • the number of measurements of the UE in the same-frequency neighboring area is reduced, and the UE is more saved. Electricity.
  • the UE performs a normal cell reselection process.
  • the UE dynamically adjusts the intra-frequency measurement trigger threshold during the cell reselection according to the state of the power, the number of the same-frequency neighboring cells measured before the successful reselection, and the time consumed by the measurement, and implements a cell reselection method. As shown in Figure 5, the following steps are included:
  • Step 501 The UE receives the SIB message from the broadcast channel, and obtains the neighbor cell list of the serving cell and the parameters required for cell reselection from the SIB, including: different intra-frequency measurement trigger thresholds corresponding to different power states, and the maximum Frequency neighboring cell threshold, maximum time threshold, minimum intra- frequency neighboring threshold, minimum time threshold, and timer duration T rcselect ;
  • Step 502 The UE is divided into different power states according to remaining battery information of the battery, including: good (remaining power > 50%), general (50% > remaining battery > 20%), and alarm (remaining power ⁇ 20%);
  • the intra- frequency measurement trigger threshold s intrasearch ( used ) ( S intrasearch + S intrasearch (battery saving)) / 2 maximum intra- frequency neighboring threshold N intrasearchl ( Used , (Ni n trasearch 1 + Ni n trasearch 1 (battery saving)) / 2 Maximum time threshold Tintrasearchl ( used) (Tintrasearch 1 +Tintrasearch 1 (battery saving)) / 2 Minimum intra- frequency neighboring threshold N intrasearch2 ( Used , (Ni n trasearch2+Ni n trasearch2(battery saving)) / 2 Minimum time gate " ⁇ T intrasearch2 ( used) (Tintrasearch2+Tintrasearch2(battery saving)) / 2 Table 2
  • Step 503 The UE performs cell reselection, and records the measured number of intra-frequency neighboring cells and the time consumed by the measurement.
  • Step 504 The UE selects the neighboring cell when the neighboring cell satisfies the reselection condition
  • Step 505 UE after a successful intra-frequency cell reselection, determines whether the same number of neighboring frequency greater than the current state of charge corresponding to the maximum number of same-frequency neighboring door limit N intrasearchl (used ,, at greater than, step 506; Otherwise, step 507 is performed;
  • Step 506 the UE automatically adjusts the S intrasearcWused corresponding to the current state of charge to S intrasearch (new), and performs step 511;
  • Step 507 the UE determines whether the time consumed by the measurement is greater than the i nras earchl (used) corresponding to the current state of charge, when greater than, step 508 is performed, otherwise step 509 is performed;
  • Step 508 the UE automatically adjusts 8 ⁇ £3 ⁇ 4 ⁇ 11 ⁇ £ 1 ) to S intrasearch (new), and performs step 511;
  • Step 509 The UE determines whether the number of the intra-frequency neighboring cells is less than the Ni n trasearch 2 (used) corresponding to the current state of charge, and the time consumed by the measurement is less than T intrasearch 2 (used) , in the same-frequency neighboring cell .
  • the number is less than the N intrasearch2 corresponding to the current state of charge , and the time consumed by the measurement is less than When T intrasearch2 , step 510 is performed, otherwise step 511 is performed;
  • Step 510 the UE automatically adjusts S intrasearch ( used ) to S intrasearch ( new ), and performs step 511;
  • Step 511 After the reselection is completed, the UE clears the number of co-frequency neighboring cells recorded in the same-frequency cell reselection and the time consumed by the measurement.
  • the UE performs the cell reselection by dynamically adjusting the intra-frequency measurement trigger threshold during cell reselection, and enables each UE to have the same-frequency measurement trigger threshold according to its own situation. It is more reasonable to perform intra-frequency measurement of neighboring cells, save UE power, and improve UE's battery life.

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Abstract

本发明公开了一种小区重选的方法，UE动态调整小区重选时的同频测量触发门限，根据调整后的同频测量触发门限执行小区重选；本发明同时还公开了一种小区重选的装置，通过本发明的方案，能够使每个UE都具有符合自身情况的同频测量触发门限，更加合理的进行相邻小区的频内测量，节省UE电量，提高UE的续航能力。

Description

一种小区重选的方法和装置 技术领域
本发明涉及移动通信技术， 尤其涉及一种通用移动通信系统（UMTS, Universal Mobile Telecommunications System ) 中小区重选的方法和装置。 背景技术
在第三代移动通信及其后续演进系统中， 无线接入网由多个无线网络 子系统构成。 每个无线网络子系统包含一个无线网络控制器（RNC， Radio Network Controller )， 多个节点 B ( NodeB )以及大量的用户设备（ UE， User Equipment )。当 UE从一个小区移动到另一个小区时，引发小区重选或切换。 小区重选和切换的区别在于 UE和网络是否建立有专用控制和数据信道， 即： 当没有建立专用控制和数据信道时， UE从一个小区移动到另一个小区， 引发小区重选（Cell reselection ); 当建立有专用控制和数据信道时， UE从 一个小区移动到另一个小区， 引发切换（ Handover )。
以终端在同一频点上移动（频内）为例， UE实现小区重选的过程如下： 步骤 101 : 在当前服务小区， UE从当前服务小区的广播信道上接收和 存储系统消息（ SIB， System Information Block )， 并从 SIB中获取当前服务 小区的邻区列表以及小区重选时所需的门限参数和定时器等参数。
步骤 102: UE周期性地测量当前服务小区导频信号的接收信号质量和 强度， 当系统消息中配置有小区重选的同频测量触发门限（Sintrasearch )参数 时， UE依据 Sintrasearcl^'j断是否进行相邻小区的频内测量； 当服务小区的小 区选择质量值（Squal ) 大于 S intrasearch门限值时， UE不执行相邻小区的同频 测量， 当服务小区的 Squal值小于等于 Sintrasearch门限值时， UE对相邻小区进 行同频测量， 执行步骤 103 ; 所述 SqUa尸 CPICH Ec/No-QqUalmin， CPICH Ec/No为小区的导频信号质量，
Qqualmin为小区的质量最小需求级别；
如果系统消息中没有配置小区重选的 Sintrasearch参数，则 UE无需判决就 对相邻小区进行同频测量。
步骤 103: UE对相邻小区进行同频测量过程中， 当测量出相邻小区的 导频信号强度和质量都大于满足驻留条件的门限值， 且所述相邻小区的等 级值高于服务小区时，则 UE将所述相邻小区作为满足重选条件的小区，在 同频测量过程结束时， 从所有满足重选条件的小区中选取等级值最高的小 区作为最适合的目标重选小区， 当所述目标重选小区在定时器 Trcselect时长 内始终保持为最合适时， UE重选到所述目标重选小区。
上述为终端频内相邻小区测量和重选的规则方法， 从以上频内小区重 选测量过程可以看出， Sintrasearcl^々配置选择非常重要。 如果设置得太小， 会 造成 UE测量开启滞后， 重选不及时， 导致接入成功率降低。 如果设置的太 大， 虽然容易过早触发对相邻小区的同频测量， 也就容易进行同频小区的 重选， 但是会加重 UE的测量负担， 消耗的 UE电量也更多。 现网中发现， 81„(；11取值的不合理，会较快地消耗掉 UE电量，导致用户续航体验下降。
现有技术规范中， Sintrasearch参数是由 RNC静态设置并广播发送给 UE 的， Sintrasearch参数的取值一般是根据经验取一个固定的值， 对服务小区中的 所有 UE都一样。 事实上每个 UE的具体情况是不一样的， 比如在小区中的 位置、 移动速度、 电量状况等。 固定单一的 Sintrasearch参数值是没有办法适配 各个 UE的具体情况的。 发明内容
有鉴于此， 本发明实施例的主要目的在于提供一种小区重选的方法和 装置， 能够节省 UE电量， 提高 UE的续航能力。
为达到上述目的， 本发明实施例的技术方案是这样实现的： 本发明实施例提供的一种小区重选的方法， 该方法包括：
UE动态调整小区重选时的同频测量触发门限，根据调整后的同频测量 触发门限执行小区重选。
上述方案中， 所述 UE动态调整小区重选时的同频测量触发门限为：
UE根据成功重选前所测量的同频邻区个数、测量所消耗的时间动态调 整小区重选时的同频测量触发门限。
上述方案中， 所述 UE根据成功重选前所测量的同频邻区个数、测量所 消耗的时间动态调整小区重选时的同频测量触发门限， 为：
UE在同频小区重选成功发生前，记录已经测量的同频邻区个数和测量 所消耗的时间； UE在成功进行同频小区重选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间是否超过对应的门限， 当所述同频邻区个数大于 最大同频邻区个数门限、和 /或所述测量所消耗的时间大于最大时间门限时， 向下调整同频测量触发门限； 当所述同频邻区个数小于最小同频邻区个数 门限、 且所述测量所消耗的时间小于最小时间门限时， 向上调整同频测量 触发门限。
上述方案中， 所述 UE动态调整小区重选时的同频测量触发门限为： UE根据电量状态动态调整小区重选时的同频测量触发门限。
上述方案中，所述 UE根据电量状态动态调整小区重选时的同频测量触 发门限为：
UE根据自身的剩余电量， 划分成不同的电量状态， UE在不同的电量 状态进行小区重选时选择不同的同频测量触发门限。
上述方案中， 所述 UE动态调整小区重选时的同频测量触发门限为：
UE根据电量状态、成功重选前所测量的同频邻区个数和测量所消耗的 时间动态调整小区重选时的同频测量触发门限。
上述方案中， 所述 UE才艮据电量状态、成功重选前所测量的同频邻区个 数和测量所消耗的时间动态调整小区重选时的同频测量触发门限， 为：
UE根据自身的剩余电量， 划分成不同的电量状态， 在不同的电量状态 选择不同的同频测量触发门限、 最大同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限和最小时间门限， 在同频小区重选成功发生前， 记 录已经测量的同频邻区个数和测量所消耗的时间， 在成功进行同频小区重 选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间是否超过对应的 门限， 当所述同频邻区个数大于最大同频邻区个数门限、 和 /或所述测量所 消耗的时间大于最大时间门限时， 向下调整当前电量状态对应的同频测量 触发门限； 当所述同频邻区个数小于最小同频邻区个数门限、 且所述测量 所消耗的时间小于最小时间门限时， 向上调整当前电量状态对应的同频测 量触发门限。
本发明实施例提供的一种小区重选的装置， 该装置包括： 动态调整模 块和小区重选模块， 其中，
动态调整模块， 配置为动态调整小区重选时的同频测量触发门限， 并 将调整后的同频测量触发门限通知小区重选模块；
小区重选模块， 配置为根据调整后的同频测量触发门限执行小区重选。 上述方案中， 所述动态调整模块， 配置为根据成功重选前所测量的同 频邻区个数、 测量所消耗的时间动态调整小区重选时的同频测量触发门限。
上述方案中， 所述动态调整模块， 配置为根据电量状态动态调整小区 重选时的同频测量触发门限。
上述方案中， 所述动态调整模块， 配置为根据电量状态、 成功重选前 所测量的同频邻区个数和测量所消耗的时间动态调整小区重选时的同频测 量触发门限。
本发明实施例提供了一种小区重选的方法和装置， UE动态调整小区重 选时的同频测量触发门限， 根据调整后的同频测量触发门限执行小区重选； 如此， 能够使每个 UE都具有符合自身情况的同频测量触发门限， 更加合理 的进行相邻小区的频内测量， 节省 UE电量， 提高 UE的续航能力。 附图说明
图 1为本发明实施例实现小区重选的方法流程示意图；
图 2为本发明实施例实现小区重选的装置的结构示意图；
图 3为本发明实施例一实现小区重选的方法流程示意图；
图 4为本发明实施例二实现小区重选的方法流程示意图；
图 5为本发明实施例三实现小区重选的方法流程示意图。 具体实施方式
本发明实施例中， UE动态调整小区重选时的同频测量触发门限， 根据 调整后的同频测量触发门限执行小区重选。
下面通过附图及具体实施例对本发明^:进一步的详细说明。
本发明实施例实现一种小区重选的方法， 如图 1 所示， 该方法包括以 下几个步骤：
步骤 201 : UE动态调整小区重选时的同频测量触发门限；
本步骤可以是： UE根据成功重选前所测量的同频邻区个数、 测量所消 耗的时间动态调整小区重选时的同频测量触发门限；
具体的， UE在同频小区重选成功发生前， 记录已经测量的同频邻区个 数和测量所消耗的时间； UE在成功进行同频小区重选后， 判断所述同频邻 区个数和 /或所述测量所消耗的时间是否超过对应的门限， 当所述同频邻区 个数大于最大同频邻区个数门限、 和 /或所述测量所消耗的时间大于最大时 间门限时， 向下调整同频测量触发门限； 当所述同频邻区个数小于最小同 频邻区个数门限、 且所述测量所消耗的时间小于最小时间门限时， 向上调 整同频测量触发门限； 所述测量所消耗的时间的统计起点为 UE刚刚成功接入源服务小区，终 点为重选到一个新的服务小区；
所述最大同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限 和最小时间门限均可以预定义或配置； 所述预定义就是在协议中给出最大 同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限和最小时间门 限的取值； 所述配置就是 RNC通过系统消息将最大同频邻区个数门限、 最 大时间门限、 最小同频邻区个数门限和最小时间门限的取值配置给 UE; 所述向下调整的幅度和向上调整的幅度也可以预定义或配置； 进一步的， UE在调整同频测量触发门限后， 删除同频小区重选成功发 生前所记录的同频邻区个数、 测量所消耗的时间。
本步骤也可以是： UE根据电量状态动态调整小区重选时的同频测量触 发门限；
具体的， UE根据自身的剩余电量， 划分成不同的电量状态， 如： 良好 (剩余电量 > 50% )、一般（ 50% >剩余电量 > 20% )、告警（剩余电量 < 20% ); UE在不同的电量状态进行小区重选时选择不同的同频测量触发门限； 这 里， 电量状态为良好时选择的同频测量触发门限要大于电量状态为一般时 选择的同频测量触发门限， 电量状态为一般时选择的同频测量触发门限大 于电量状态为告警时选择的同频测量触发门限；
上述电量状态区间值， 可以根据需要调整。
本步骤还可以是： UE根据电量状态、 成功重选前所测量的同频邻区个 数和测量所消耗的时间动态调整小区重选时的同频测量触发门限；
具体的， UE根据自身的剩余电量， 划分成不同的电量状态， 如： 良好 (剩余电量 > 50% )、一般（ 50% >剩余电量 > 20% )、告警（剩余电量 < 20% ); 在不同的电量状态选择不同的同频测量触发门限、 最大同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限和最小时间门限， 在同频小区重选 成功发生前， 记录已经测量的同频邻区个数和测量所消耗的时间， 在成功 进行同频小区重选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间 是否超过对应的门限， 当所述同频邻区个数大于最大同频邻区个数门限、 和 /或所述测量所消耗的时间大于最大时间门限时， 向下调整当前电量状态 对应的同频测量触发门限； 当所述同频邻区个数小于最小同频邻区个数门 限、 且所述测量所消耗的时间小于最小时间门限时， 向上调整当前电量状 态对应的同频测量触发门限。
步骤 202: UE根据调整后的同频测量触发门限执行小区重选；
UE依据调整后的同频测量触发门限判断是否进行相邻小区的频内测 量； 当服务小区的 SqUal值大于所述同频测量触发门限时， UE不执行相邻小 区的同频测量， 当服务小区的 squal值小于等于所述同频测量触发门限时，
UE对相邻小区进行同频测量；
所述 SqUa尸 CPICH Ec/No-QqUalmin， CPICH Ec/No为小区的导频信号质量，
Qqualmin为小区的质量最小需求级别；
UE对相邻小区进行同频测量过程中， 当测量出相邻小区的导频信号强 度和质量都大于满足驻留条件的门限值， 且所述相邻小区的等级值高于服 务小区时，则 UE将所述相邻小区作为满足重选条件的小区，在同频测量过 程结束时， 从所有满足重选条件的小区中选取等级值最高的小区作为最适 合的目标重选小区， 当所述目标重选小区在定时器 Trcselect时长内始终保持 为最合适时， UE重选到所述目标重选小区。
为了实现上述方法， 本发明实施例还提供一种小区重选的装置， 该装 置位于 UE中， 如图 2所示， 该装置包括： 动态调整模块 11和小区重选模 块 12， 其中，
动态调整模块 11， 配置为动态调整小区重选时的同频测量触发门限， 并将调整后的同频测量触发门限通知小区重选模块 12; 小区重选模块 12， 配置为根据调整后的同频测量触发门限执行小区重 选；
所述动态调整模块 11， 具体配置为根据成功重选前所测量的同频邻区 个数、 测量所消耗的时间动态调整小区重选时的同频测量触发门限；
具体的， 所述动态调整模块 11在同频小区重选成功发生前， 记录已经 测量的同频邻区个数和测量所消耗的时间； 在成功进行同频小区重选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间是否超过对应的门限， 当所述同频邻区个数大于最大同频邻区个数门限、 和 /或所述测量所消耗的 时间大于最大时间门限时， 向下调整同频测量触发门限； 当所述同频邻区 个数小于最小同频邻区个数门限、 且所述测量所消耗的时间小于最小时间 门限时， 向上调整同频测量触发门限；
或者， 所述动态调整模块 11， 具体配置为才艮据电量状态动态调整小区 重选时的同频测量触发门限；
具体的， 所述动态调整模块 11根据自身所在 UE的剩余电量， 划分成 不同的电量状态， 如： 良好（剩余电量 > 50% )、 一般（50% >剩余电量> 20% )、 告警（剩余电量 < 20% )； 在不同的电量状态进行小区重选时向小区 重选模块 12通知不同的同频测量触发门限；
或者， 所述动态调整模块 11， 具体配置为才艮据电量状态、 成功重选前 所测量的同频邻区个数和测量所消耗的时间动态调整小区重选时的同频测 量触发门限；
具体的， 所述动态调整模块 11根据自身所在 UE的剩余电量， 划分成 不同的电量状态， 如： 良好（剩余电量 > 50% )、 一般（50% >剩余电量> 20% )、 告警（剩余电量 < 20% )； 在不同的电量状态选择不同的同频测量触 发门限、 最大同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限 和最小时间门限， 在同频小区重选成功发生前， 记录已经测量的同频邻区 个数和测量所消耗的时间， 在成功进行同频小区重选后， 判断所述同频邻 区个数和 /或所述测量所消耗的时间是否超过对应的门限， 当所述同频邻区 个数大于当前电量状态对应的最大同频邻区个数门限、 和 /或所述测量所消 耗的时间大于当前电量状态对应的最大时间门限时， 向下调整当前电量状 态对应的同频测量触发门限； 当所述同频邻区个数小于当前电量状态对应 的最小同频邻区个数门限、 且所述测量所消耗的时间小于当前电量状态对 应的最小时间门限时， 向上调整当前电量状态对应的同频测量触发门限。 实施例 1
本实施例中 UE才艮据成功重选前所测量的同频邻区个数和测量所消耗 的时间来动态调整小区重选时的同频测量触发门限， 实现小区重选的方法 如图 3所示， 包括以下几个步骤：
步骤 301， UE从广播信道上接受 SIB消息， 并从 SIB中获取服务小区 的邻区列表以及小区重选时所需的参数，包括：同频测量触发门限 Sintrasearch、 最大同频邻区个数门限 Nintrasearchl、 最大时间门限 Tintrasearchl、 最小同频邻区 个数门限 Nintrasearch2、 最小时间门限 Tintrasearch2和定时器时长 Trcselect等；
步骤 302， UE周期性地测量当前服务小区导频信号的接收信号质量和 强度；
步骤 303， UE判断服务小区的 Squal值是否大于 S intrasearch门限值， 在大 于时， UE不执行相邻小区的同频测量， 流程结束； 在不大于时， 执行步骤 304;
所述 SqUa尸 CPICH Ec/No-QqUalmin， CPICH Ec/No 为小区的导频信号质 量， （¾^„^为小区的质量最小需求级别；
步骤 304， UE对邻区列表中的同频邻区进行频内测量；
步骤 305， UE记录测量的同频邻区个数和测量所消耗的时间； 步骤 306 UE执行小区重选；
具体的， UE对同频邻区进行测量过程中， 当测量出相邻小区的导频信 号强度和质量都大于满足驻留条件的门限值， 且所述相邻小区的等级值高 于服务小区时，则 UE将所述相邻小区作为满足重选条件的小区，在同频测 量过程结束时， 从所有满足重选条件的小区中选取等级值最高的小区作为 最适合的目标重选小区， 当所述目标重选小区在定时器 Trcselect时长内始终 保持为最合适时， UE重选到所述目标重选小区；
步骤 307 UE在成功进行同频小区重选后， 判断所述同频邻区个数否 大于最大同频邻区个数门限 Nintrasearchl， 在大于时， 执行步骤 308; 否则执行 步骤 309;
步骤 308 UE自动向下调整 Sintrasearch为新的同频测量触发门限（ Sintrasearch ( new ) ), 执行步骤 313 ;
具体的， SintraSearch ( new ) = Sintra ch - delta, delta为预定义的幅度； 本步骤是因为 UE过度做了不必要的同频相邻小区的测量，所以要降低 同频测量触发门限， 从而使重选变得困难些， 减少不必要的同频邻区测量。
步骤 309 UE 判断所述测量所消耗的时间是否大于最大时间门限 Tintrasearchl , 在大于时， 执行步骤 310， 否则执行步骤 31 1 ;
步骤 310 UE自动向下调整 Sintrasearch为 Sintrasearch ( new )，执行步骤 313 ; 具体的， SintraSearch ( new ) = Sintra ch - delta, delta为预定义的幅度； 本步骤是因为 UE过度做了不必要的同频相邻小区的测量，所以要降低 同频测量触发门限， 从而使重选变得困难些， 减少不必要的同频邻区测量。
步骤 311 UE判断是否所述同频邻区个数小于最小同频邻区个数门限 Nintrasearch2、且所述测量所消耗的时间小于最小时间门限 Tintrasearch2，在所述同 频邻区个数小于最小同频邻区个数门限 Nintrasearch2、 且所述测量所消耗的时 间小于最小时间门限 Tintrasearch2时， 执行步骤 312， 否则执行步骤 313 ; 步骤 312， UE自动向上调整 Sintrasearch为 Sintrasearch ( new )，执行步骤 313 ; 具体的， Sintrasearch ( new ) = Sintrasearch+ delta, delta为预定义的幅度； 本步骤是因为 UE不太容易发生重选， 所以要提高同频测量触发门限， 从而使重选变得容易些， 避免因重选不及时导致的接入成功率降低。
步骤 313， 重选完成后， UE清除同频小区重选时所记录的同频邻区个 数和测量所消耗的时间。
实施例 2
本实施例中， UE根据剩余电量状态来动态调整小区重选时的同频测量 触发门限， 实现小区重选的方法如图 4所示， 包括以下几个步骤：
步骤 401， UE从广播信道上接受 SIB消息， 并从 SIB中获取该服务小 区的邻区列表以及小区重选时所需的参数， 包括： 正常同频测量触发门限
Sintrasearch ^ 节电同频测量触发门限 Sintrasearch ( battery saving )和定时器时长 Trcselect 等参数， 所述 sintrasearch ( battery saving )比 sintrasearch的值要小；
步骤 402， UE根据电池的剩余电量信息， 划分成不同的电量状态， 包 括： 良好（剩余电量 > 50% )、 一般（50% >剩余电量> 20% )、 告警（剩余 电量 < 20% )；
步骤 403， 当电量状态为良好时， UE在小区重选时所选择的同频测量 触发门限为 Sintrasearch;
步骤 404， 当电量状态为一般时， UE在小区重选时所选择的同频测量 触发门限为 Sintrasearch和 Sintrasearch ( battery saving )的平均值；
步骤 405， 当电量状态为告警时， UE在小区重选时所选择的同频测量 触发门限为 Sintrasearch ( battery saving )，
本实施例中， 由于 sintrasearch ( battery saving )比 sintrasearch要小， 在同频测量触 发门限为 Sintrasearch ( battery saving,时， 触发 UE对同频邻区的测量次数就减少， 更加节省 UE的电量。 步骤 406， UE执行正常的小区重选过程。
实施例 3
本实施例中 UE才艮据电量状态、成功重选前所测量的同频邻区个数和测 量所消耗的时间动态调整小区重选时的同频测量触发门限， 实现小区重选 的方法如图 5所示， 包括以下几个步骤：
步骤 501， UE从广播信道上接受 SIB消息， 并从 SIB中获取该服务小 区的邻区列表以及小区重选时所需的参数， 包括： 不同电量状态对应的不 同同频测量触发门限、 最大同频邻区个数门限、 最大时间门限、 最小同频 邻区个数门限、 最小时间门限和定时器时长 Trcselect;
步骤 502， UE根据电池的剩余电量信息， 划分成不同的电量状态， 包 括： 良好（剩余电量 > 50% )、 一般（50% >剩余电量> 20% )、 告警（剩余 电量 < 20% )；
本步骤中， 当电量状态为良好时， UE在小区重选时所采用的各参数的 取值如表 1所示；
Figure imgf000013_0001
表 1
当电量状态为一般时， UE在小区重选时所采用的各参数的取值如表 2 所示；
参数名称 取值
同频测量触发门限 sintrasearch ( used) ( S intrasearch+ S intrasearch(battery saving))/ 2 最大同频邻区个数门限 Nintrasearchl ( Used, (Nintrasearch 1 +Nintrasearch 1 (battery saving))/ 2 最大时间门限 Tintrasearchl ( used) (Tintrasearch 1 +Tintrasearch 1 (battery saving))/ 2 最小同频邻区个数门限 Nintrasearch2 ( Used, (Nintrasearch2+Nintrasearch2(battery saving))/ 2 最小时间门「艮 Tintrasearch2 ( used) (Tintrasearch2+Tintrasearch2(battery saving))/ 2 表 2
当电量状态为告警时， UE在小区重选时所采用的各参数的取值如表 3 所示；
Figure imgf000014_0001
表 3
步骤 503， UE进行小区重选， 记录测量的同频邻区个数和测量所消耗 的时间；
步骤 504， UE在邻区满足重选条件时， 选到所述邻区；
步骤 505， UE在成功进行同频小区重选后， 判断所述同频邻区个数否 大于当前电量状态对应的最大同频邻区个数门限 Nintrasearchl ( used ,，在大于时， 执行步骤 506; 否则执行步骤 507;
步骤 506，UE自动向下调整当前电量状态对应的 SintrasearcWused,为 Sintrasearch (new), 执行步骤 511;
具体的， Sintrasearch ( new ) = Sintrasearch (used) - delta, delta为预定义的幅度。 步骤 507， UE判断所述测量所消耗的时间是否大于当前电量状态对应 的 inrasearchl (used)， 在大于时， 执行步骤 508， 否则执行步骤 509;
步骤 508， UE 自动向下调整 8^£1¾^11^£1)为 Sintrasearch (new), 执行步 骤 511;
具体的， Sintrasearch ( new ) = Sintrasearch (used) - delta, delta为预定义的幅度。 步骤 509， UE 判断是否所述同频邻区个数小于当前电量状态对应的 Nintrasearch2 (used)、且所述测量所消耗的时间小于 Tintrasearch2 (used)，在所述同频邻 区个数小于当前电量状态对应的 Nintrasearch2、 且所述测量所消耗的时间小于 Tintrasearch2时， 执行步骤 510， 否则执行步骤 511 ;
步骤 510， UE 自动向上调整 Sintrasearch ( used)为 Sintrasearch ( new ), 执行步 骤 511 ;
具体的， Sintrasearch ( new ) = 8ι11ΐΜδ62ΓΛ ( used ) + delta， delta为预定义的幅度。 步骤 511， 重选完成后， UE清除同频小区重选时所记录的同频邻区个 数和测量所消耗的时间。 工业实用性
本发明实施例提供的小区重选的方法和装置， UE通过动态调整小区重 选时的同频测量触发门限，执行小区重选， 能够使每个 UE都具有符合自身 情况的同频测量触发门限， 更加合理的进行相邻小区的频内测量， 节省 UE 电量， 提高 UE的续航能力。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种小区重选的方法， 该方法包括：
用户设备（UE )动态调整小区重选时的同频测量触发门限， 根据调整 后的同频测量触发门限执行小区重选。
2、 根据权利要求 1所述的方法， 其中， 所述 UE动态调整小区重选时 的同频测量触发门限为：
UE根据成功重选前所测量的同频邻区个数、测量所消耗的时间动态调 整小区重选时的同频测量触发门限。
3、 根据权利要求 2所述的方法， 其中， 所述 UE根据成功重选前所测 量的同频邻区个数、 测量所消耗的时间动态调整小区重选时的同频测量触 发门限， 为：
UE在同频小区重选成功发生前，记录已经测量的同频邻区个数和测量 所消耗的时间； UE在成功进行同频小区重选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间是否超过对应的门限， 当所述同频邻区个数大于 最大同频邻区个数门限、和 /或所述测量所消耗的时间大于最大时间门限时， 向下调整同频测量触发门限； 当所述同频邻区个数小于最小同频邻区个数 门限、 且所述测量所消耗的时间小于最小时间门限时， 向上调整同频测量 触发门限。
4、 根据权利要求 1所述的方法， 其中， 所述 UE动态调整小区重选时 的同频测量触发门限为：
UE根据电量状态动态调整小区重选时的同频测量触发门限。
5、 根据权利要求 4所述的方法， 其中， 所述 UE根据电量状态动态调 整小区重选时的同频测量触发门限为：
UE根据自身的剩余电量， 划分成不同的电量状态， UE在不同的电量 状态进行小区重选时选择不同的同频测量触发门限。
6、 根据权利要求 1所述的方法， 其中， 所述 UE动态调整小区重选时 的同频测量触发门限为：
UE根据电量状态、成功重选前所测量的同频邻区个数和测量所消耗的 时间动态调整小区重选时的同频测量触发门限。
7、 根据权利要求 6所述的方法， 其中， 所述 UE根据电量状态、 成功 重选前所测量的同频邻区个数和测量所消耗的时间动态调整小区重选时的 同频测量触发门限， 为：
UE根据自身的剩余电量， 划分成不同的电量状态， 在不同的电量状态 选择不同的同频测量触发门限、 最大同频邻区个数门限、 最大时间门限、 最小同频邻区个数门限和最小时间门限， 在同频小区重选成功发生前， 记 录已经测量的同频邻区个数和测量所消耗的时间， 在成功进行同频小区重 选后， 判断所述同频邻区个数和 /或所述测量所消耗的时间是否超过对应的 门限， 当所述同频邻区个数大于最大同频邻区个数门限、 和 /或所述测量所 消耗的时间大于最大时间门限时， 向下调整当前电量状态对应的同频测量 触发门限； 当所述同频邻区个数小于最小同频邻区个数门限、 且所述测量 所消耗的时间小于最小时间门限时， 向上调整当前电量状态对应的同频测 量触发门限。
8、一种小区重选的装置， 该装置包括： 动态调整模块和小区重选模块， 其中，
动态调整模块， 配置为动态调整小区重选时的同频测量触发门限， 并 将调整后的同频测量触发门限通知小区重选模块；
小区重选模块， 配置为根据调整后的同频测量触发门限执行小区重选。
9、 根据权利要求 8所述的装置， 其中， 所述动态调整模块， 配置为根 据成功重选前所测量的同频邻区个数、 测量所消耗的时间动态调整小区重 选时的同频测量触发门限。
10、 根据权利要求 8所述的装置， 其中， 所述动态调整模块， 配置为 根据电量状态动态调整小区重选时的同频测量触发门限。
11、 根据权利要求 8 所述的装置， 其中， 所述动态调整模块， 配置为 根据电量状态、 成功重选前所测量的同频邻区个数和测量所消耗的时间动 态调整小区重选时的同频测量触发门限。
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