WO2014071579A1 - 一种小区之间定时同步的方法及装置 - Google Patents

一种小区之间定时同步的方法及装置 Download PDF

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Publication number
WO2014071579A1
WO2014071579A1 PCT/CN2012/084237 CN2012084237W WO2014071579A1 WO 2014071579 A1 WO2014071579 A1 WO 2014071579A1 CN 2012084237 W CN2012084237 W CN 2012084237W WO 2014071579 A1 WO2014071579 A1 WO 2014071579A1
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WO
WIPO (PCT)
Prior art keywords
subframe
timing
difference
base station
time difference
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PCT/CN2012/084237
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English (en)
French (fr)
Inventor
胡军
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/084237 priority Critical patent/WO2014071579A1/zh
Priority to CN201280075151.2A priority patent/CN104541555B/zh
Publication of WO2014071579A1 publication Critical patent/WO2014071579A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present invention relates to the field of communication network technologies, and in particular, to a method and apparatus for timing synchronization between cells. Background technique
  • the base station Before the base station starts working, configure an absolute time for each base station, and set this time on the Global Positioning System (GPS). For example, at 12:00 noon on January 1, 2010, it is a base station. The start time of the subframe in which the system frame number (SFN) is 0 and the subframe number is 0. The current absolute time is obtained by the GPS in the base station, and then the base station calculates the current cell time timing according to the configured absolute time and the acquired current absolute time, that is, the system frame number and the subframe number of the base station are respectively calculated. Since the absolute time of each base station is the same, the calculated cell time timing is also consistent. The current system frame number and the subframe number of the cell can be modified according to the current cell time timing to implement timing synchronization between the cells.
  • GPS Global Positioning System
  • each base station needs GPS hardware and installs a GPS antenna, resulting in high equipment cost and installation cost, and when the base station is deployed indoors, GPS signals cannot be acquired, resulting in failure to achieve timing synchronization. .
  • Embodiments of the present invention provide a method and apparatus for timing synchronization between cells, which can implement timing synchronization in a small interval, and reduce equipment cost and installation cost.
  • an embodiment of the present invention provides a method for timing synchronization between cells, including: receiving, by a terminal, a timing measurement control message sent by a base station, and starting timing measurement, where the timing measurement control message includes a neighbor cell identifier to be measured;
  • the terminal measures a timing difference between a serving cell and a neighboring cell corresponding to the identifier of the neighboring cell to be measured;
  • the terminal reports the timing difference to the base station, so that the base station adjusts the timing time of the monthly service cell according to the timing difference, and synchronizes with the neighboring cell timing.
  • the timing time difference includes a timing time difference of a radio frame level
  • the timing time difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the timing difference between the terminal measurement serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured includes:
  • the terminal measures a start time of the first subframe of the neighboring cell, and measures a start time of the second subframe of the serving cell, where the second subframe is obtained by measuring the serving cell a subframe that is determined to be the closest to the start time of the first subframe in the at least two subframes; the terminal according to the start time of the first subframe and the second subframe Determining the reference signal time difference at the beginning time;
  • the timing measurement control message further includes a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message further includes a reporting period
  • the timing measurement control message further includes a time difference threshold.
  • the reporting the timing difference to the base station includes:
  • the reporting mode is the periodic reporting
  • the measurement report is triggered, and the terminal reports the timing difference to the base station
  • the reporting manner is the event reporting, when the reference signal time difference is greater than the time difference threshold in the timing time difference, the measurement report is triggered, and the terminal reports the timing difference to the base station.
  • the embodiment of the present invention provides a method for timing synchronization between cells, including: the base station sends a timing measurement control message to the terminal, where the timing measurement control message includes a neighbor cell identifier to be measured, so that the terminal measurement center a timing difference between a server cell where the terminal is located and a neighboring cell corresponding to the identifier of the neighboring cell to be measured;
  • the base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization of the neighboring cell corresponding to the neighbor cell identifier to be measured.
  • the timing time difference includes a timing time difference of a radio frame level
  • the timing time difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the adjusting, by the base station, the timing of the serving cell according to the timing difference :
  • T1 represents the adjusted start time of the subframe
  • the TO represents the start time of the pre-adjustment subframe
  • the RSTD represents the time difference of the reference signal
  • SBFN1 (SBFN0 + SBFND) mode 1 0; wherein, the SBFN1 indicates the adjusted subframe number, the SBFN0 indicates the subframe number before the adjustment, and the SBFND indicates the subframe number difference. ;
  • the method before the adjusting the timing of the serving cell according to the timing difference, the method further includes:
  • the base station gradually reduces the power by using the first preset power as a step, and then turns off after the terminal has no connected state under the base station;
  • the method further includes: the base station is turned on with a second preset power, and the power is gradually increased by using the second preset power in steps until the power of the base station reaches Stop increasing power when the maximum power is set.
  • an embodiment of the present invention provides a device for timing synchronization between cells, including: a receiving unit, configured to receive a timing measurement control message sent by a base station, and start timing measurement, where the timing measurement control message includes a to-be-measured neighbor.
  • a receiving unit configured to receive a timing measurement control message sent by a base station, and start timing measurement, where the timing measurement control message includes a to-be-measured neighbor.
  • a measuring unit configured to measure a time difference between the serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured
  • a sending unit configured to report the timing difference to the base station, so that the base station adjusts a timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the timing time difference includes a timing time difference of a radio frame level
  • the timing time difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the measuring unit includes:
  • a measurement module configured to measure a start time of the first subframe of the neighboring cell, and measure a start time of the second subframe of the serving cell, where the second subframe is a slave measurement service a subframe in which at least two subframes obtained by the cell are determined to be closest to a start time of the first subframe;
  • a first determining module configured to determine, according to a start time of the first subframe and a start time of the second subframe, a time difference of the reference signal
  • a second determining module configured to determine the first subframe number according to the first subframe, and determine the second subframe number according to the second subframe, and according to the first subframe number and The second subframe number determines the subframe number difference;
  • a third determining module configured to determine, according to the first subframe, a first system frame number corresponding to the radio frame that includes the first subframe, and determine, according to the second subframe, that the second subframe is included a second system frame number corresponding to the radio frame, and determining the system frame number difference according to the first system frame number and the second system frame number.
  • the timing measurement control message further includes a reporting manner, where The reporting method includes periodic reporting or event reporting;
  • the timing measurement control message further includes a reporting period
  • the timing measurement control message further includes a time difference threshold.
  • the sending unit is configured to:
  • the reporting mode is the periodic reporting
  • the measurement report is triggered, and the timing difference is reported to the base station
  • the reporting manner is the event reporting
  • the time difference of the reference signal is greater than the time difference threshold
  • the measurement report is triggered, and the timing difference is reported to the base station.
  • the embodiment of the present invention provides a device for timing synchronization between cells, including: a sending unit, configured to send a timing measurement control message to the terminal, where the timing measurement control message includes a neighbor cell identifier to be measured, so as to The terminal measures a timing difference between a server cell where the terminal is located and a neighboring cell corresponding to the to-be-measured neighbor and the area identifier;
  • a receiving unit configured to receive the timing time difference sent by the terminal
  • an adjusting unit configured to adjust a timing of the serving cell according to the timing difference to achieve timing synchronization of the neighboring cell corresponding to the to-be-measured neighboring cell identifier.
  • the timing time difference includes a timing time difference of a radio frame level
  • the timing time difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the adjusting unit is configured to:
  • T1 represents the adjusted start time of the subframe
  • the TO represents the start time of the pre-adjustment subframe
  • the RSTD represents the time difference of the reference signal
  • Adjusting the subframe number according to SBFN1 (SBFN0 + SBFND) mode 10; wherein, the SBFN1 indicates the adjusted subframe number, the SBFN0 indicates the subframe number before the adjustment, and the SBFND indicates the subframe number difference;
  • the apparatus further includes:
  • the first processing unit is configured to gradually reduce the power by using the first preset power as a step, and then shut down after the terminal without the connected state in the device;
  • the second processing unit is configured to be turned on with the second preset power, and gradually increase the power by using the second preset power as a step, and stop increasing the power until the power of the device reaches the maximum set power.
  • an embodiment of the present invention provides a terminal, including:
  • a receiver configured to receive a timing measurement control message sent by the base station, and start a timing measurement, where the timing measurement control message includes a neighbor cell identifier to be measured;
  • a processor configured to measure a timing difference between a serving cell and a neighboring cell corresponding to the to-be-measured neighbor cell identifier
  • a transmitter configured to report the timing difference to the base station, so that the base station adjusts a timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the timing difference includes a timing difference of a radio frame level, where a timing difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference; And measuring a start time of the first subframe of the neighboring cell, and measuring a start time of the second subframe of the serving cell, where the second subframe is at least two obtained from measuring the serving cell a subframe in which the determined start time is closest to the start time of the first subframe;
  • the timing measurement control message further includes a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message further includes a reporting period; the processor is further configured to: when the reporting period arrives, trigger a measurement report report, and report the timing difference Giving the base station;
  • the timing measurement control message further includes a time difference threshold; the processor is further configured to: when the reference signal time difference is greater than the time difference threshold in the timing time difference, triggering The measurement report is reported, and the timing difference is reported to the base station.
  • a base station includes:
  • a transmitter configured to send a timing measurement control message to the terminal, where the timing measurement control message includes an identifier of the neighboring cell to be measured, so that the terminal measures the neighbor of the server cell where the terminal is located and the identifier of the neighboring cell to be measured Timing time difference between cells;
  • a receiver configured to receive the timing difference sent by the terminal
  • a processor configured to adjust a timing of the serving cell according to the timing difference to obtain a neighbor cell timing synchronization corresponding to the to-be-measured neighbor cell identifier.
  • the timing difference includes a timing difference of a radio frame level
  • the timing difference of the radio frame level includes a reference signal time difference, a subframe number difference, and a system frame number difference
  • SBFN1 (SBFN0 + SBFND) mode 1 0; wherein, the SBFN1 indicates the adjusted subframe number, the SBFN0 indicates the subframe number before the adjustment, and the SBFND indicates the subframe number. Poor
  • SFN1 (SFN0 + SFND) mode 1 024; wherein, the SFN1 represents the adjusted system frame number, and the SFN0 represents the system frame number before the adjustment, the SFND Indicates that the system frame number difference.
  • the processor is further configured to:
  • the power is turned on by the second preset power, and the power is gradually increased by using the second preset power as a step, and the power is stopped until the power of the base station reaches the maximum set power.
  • the embodiment of the invention provides a method and a device for synchronizing timing between cells, and receives a timing measurement control message sent by a base station, and starts a timing measurement, where the timing measurement control message includes an identifier of a neighboring cell to be measured; Determining a timing difference between the neighboring cells corresponding to the neighboring cell identifiers, and reporting the timing difference to the base station, so that the base station adjusts the timing of the neighboring cell according to the timing difference, Neighbor cell timing synchronization.
  • each base station needs GPS hardware and installs a GPS antenna, resulting in high equipment cost and high installation cost, and when the base station is deployed indoors, GPS signals cannot be acquired, resulting in failure to achieve timing synchronization, and the present invention is implemented.
  • the scheme provided by the example measures the timing difference between the serving cell and the neighboring cell, and the base station adjusts the timing according to the timing difference, which can implement timing synchronization between cells, and reduce equipment cost and installation cost.
  • FIG. 1 is a flowchart of a method for timing synchronization between cells according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of another method for timing synchronization between cells according to Embodiment 1 of the present invention
  • FIG. 4 is a block diagram of another apparatus for timing synchronization between cells according to Embodiment 1 of the present invention
  • FIG. 6 is a flowchart of a method for timing synchronization between cells according to Embodiment 2 of the present invention
  • FIG. 7 is a schematic diagram of a smoothing off base station according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic diagram of a smooth-on base station according to Embodiment 2 of the present invention.
  • FIG. 9 is a block diagram of an apparatus for timing synchronization between cells according to Embodiment 2 of the present invention
  • FIG. 10 is a block diagram of another apparatus for timing synchronization between cells according to Embodiment 2 of the present invention
  • FIG. 12 is a block diagram of a base station according to Embodiment 3 of the present invention. detailed description
  • the embodiment of the invention provides a method for timing synchronization between cells. As shown in FIG. 1, the method includes the following steps:
  • Step 101 The terminal receives the timing measurement control message sent by the base station, and starts timing measurement, where the timing measurement control message includes the identifier of the neighboring cell to be measured.
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can know which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the base station has the completed timing measurement.
  • the function of the terminal sends a timing measurement control message, and the terminal that receives the message initiates the timing measurement and performs further operations.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the base station may provide a small base station for serving the serving cell where the terminal is located, and the small base station
  • the station may be a small base station serving the micro-cell Micro Cel l, a small base station serving the pico Cel l, or a small base station serving the Femto Cel l of the home cell.
  • the macro base station may be a service serving the neighboring cell to be measured, and the macro base station may be a macro base station serving the Macro Cel l.
  • the timing mechanism used by the terminal to perform timing measurement can be understood as follows: The terminal can know the time when the base station periodically sends a signal according to the received signal sent by the base station, so the terminal can arrive at the time when the base station sends a signal. Time measurement is performed.
  • timing measurement control message may further include a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message further includes a reporting period; when the upper >3 ⁇ 4 mode is an event, the time measurement threshold message is further included in the timing measurement control message.
  • Step 102 The terminal measures a time difference between the serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a Reference S igna l Time Difference (RSTD), a Subframe Number Difference (SBFND), and a System Frame Number Difference (System Frame Number Difference) , SFND).
  • RSTD Reference S igna l Time Difference
  • SBFND Subframe Number Difference
  • SFND System Frame Number Difference
  • the terminal measures a timing difference between the serving cell and the neighboring cell corresponding to the to-be-measured neighboring cell identifier, that is, the reference signal time difference and the subframe number between the neighboring cell corresponding to the measurement of the serving cell and the neighboring cell identifier to be measured.
  • the difference and the system frame number difference are the timing difference between the serving cell and the neighboring cell corresponding to the to-be-measured neighboring cell identifier.
  • the time difference between the reference signal and the neighboring cell corresponding to the neighboring cell identifier to be measured may be: the terminal measures the start time of the first subframe of the neighboring cell, and measures the serving cell where the terminal is located. Determining a start time of the at least one subframe, and determining a start time of the second subframe, where the second subframe is a start time and a first subframe determined from at least two subframes obtained by measuring the serving cell The most recent subframe of the start time; the terminal determines the reference signal time difference according to the start time of the first subframe and the start time of the second subframe;
  • the terminal may specifically: the terminal determines the first subframe number according to the first subframe, and the root Determining a second subframe number according to the second subframe, and determining a subframe number difference according to the first subframe number and the second subframe number; and optionally, the terminal measuring the neighboring cell corresponding to the serving cell and the neighbor cell identifier to be measured Specifically, the system may determine that the first system frame number corresponding to the radio frame that includes the first subframe is determined according to the first subframe, and the wireless component that includes the second subframe is determined according to the second subframe. a second system frame number corresponding to the frame, and determining a system frame number difference according to the first system frame number and the second system frame number.
  • Step 103 The terminal reports the timing difference to the base station, so that the base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the time difference may be reported according to the reporting manner included in the timing measurement control message, where the reporting manner includes periodic reporting or event reporting.
  • the periodic report is used to trigger the measurement report to be reported when the reporting period arrives.
  • the serving cell measured before the reporting period expires is adjacent to the neighboring d and the area identifier to be measured.
  • the timing difference between the cells is reported to the base station;
  • the average of the multiple timing differences measured in the period may be reported to the base station, or the first timing difference of the multiple timing differences measured in the period may also be used.
  • the report is reported to the base station, where the first timing time difference is the most accurate one of the plurality of timing time differences. For example, a more accurate timing difference threshold can be set according to experience, and a timing difference that is closest to the timing time difference threshold among the plurality of timing time differences is determined as the first timing difference.
  • the event report is used to trigger the measurement report report when the trigger event occurs.
  • the time difference of the reference signal in the time difference between the serving cell measured by the terminal and the neighbor cell corresponding to the neighbor cell identifier to be measured When the time difference threshold is greater than the time difference, the measured timing difference is reported to the base station.
  • the embodiment of the present invention provides a method for timing synchronization between cells, where the terminal receives the timing measurement control message sent by the base station, and after starting the timing measurement, the measured time difference between the serving cell and the neighboring cell corresponding to the neighbor cell identifier to be measured And then reporting the timing difference to the base station, so that the base station can adjust the timing of the serving cell according to the timing difference to reach the neighboring cell timing. Synchronization enables timing synchronization between cells and reduces equipment cost and installation cost.
  • the embodiment of the invention provides a method for timing synchronization between cells. As shown in FIG. 2, the method includes the following steps:
  • Step 201 The base station sends a timing measurement control message to the terminal, where the timing measurement control message includes the identifier of the neighboring cell to be measured, so that the terminal measures the time difference between the serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can know which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the base station has the completion timing measurement.
  • the function of the terminal sends a timing measurement control message, and the terminal that receives the message initiates the timing measurement and performs further operations.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the base station may be a small base station serving the serving cell where the terminal is located, and the small base station may be a small base station serving the micro cell of the micro cell, or a small base station serving the pico Cel l, or A small base station serving the family cell Femto Cel l.
  • the macro base station may be a service serving the neighboring cell to be measured, and the macro base station may be a macro base station serving Macro Cel l.
  • Step 202 The base station receives a timing difference sent by the terminal.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the base station further includes: the base station gradually reduces the power in the step of the first preset power, and the base station is turned off after the terminal has no connected state in the base station, where the base station off refers to providing the power transmission function in the base station.
  • the device or module is closed, so that when the base station adjusts the timing of the serving cell, the terminal in the serving cell can be prevented from dropping.
  • Step 203 The base station adjusts the timing of the serving cell according to the received timing difference to achieve timing synchronization with the neighboring cell corresponding to the neighboring d and the area identifier to be measured.
  • the method further includes: the base station is turned on by the second preset power, and the power is gradually increased by using the second preset power as the step size, until the power of the base station reaches the maximum set power, and the power is stopped. Stopping when the power of the base station is raised to the maximum set power enables the base station to transmit signals at this maximum set power and handle other transactions of the base station.
  • the embodiment of the invention provides a method for timing synchronization between cells, which receives the timing difference sent by the terminal, and then adjusts the timing of the serving cell according to the timing difference, so that timing synchronization with the neighboring cell can be achieved, and the equipment cost of the base station can be reduced. , installation costs.
  • An embodiment of the present invention provides a device for timing synchronization between cells. As shown in FIG. 3, the device includes: a receiving unit 301, a measuring unit 302, and a sending unit 303.
  • the device may be a terminal, and the terminal may be located at the terminal.
  • the edge of the serving cell is close to the terminal of the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can know which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the base station has the completed timing measurement.
  • the function of the terminal sends a timing measurement control message, and the terminal that receives the message initiates the timing measurement and performs further operations.
  • the receiving unit 301 is configured to receive a timing measurement control message sent by the base station, and start a timing measurement, where the timing measurement control message includes a neighbor cell identifier to be measured.
  • timing measurement control message may further include a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message When the reporting mode is periodic reporting, the timing measurement control message further includes a reporting period. When the reporting mode is an event reporting, the timing measurement control message further includes a time difference threshold.
  • the timing mechanism used by the receiving unit 301 to perform timing measurement can be understood as follows:
  • the receiving unit 301 in the terminal can learn the time when the base station periodically sends a signal according to the received signal sent by the base station, so the receiving unit 301 can send a signal at the base station. When the time comes, a timing measurement is made.
  • the measuring unit 302 is configured to measure a timing difference between the serving cell and the neighboring cell corresponding to the neighboring d and the area identifier to be measured;
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference;
  • the measuring unit 302 includes: a measurement module, a first determining module, a second determining module, and a third determining module;
  • the measurement module in the measurement unit 302 is configured to measure a start time of the first subframe of the neighboring cell, and measure a start time of the second subframe of the serving cell, where the second subframe is a measurement from the measurement a subframe in which at least two subframes determined by the serving cell are determined to be closest to the start time of the first subframe;
  • a second determining module in the measuring unit 302, configured to determine a first subframe number according to the first subframe, and determine a second subframe number according to the second subframe, and according to the first subframe number and the second subframe number Determining the subframe number difference;
  • a third determining module in the measuring unit 302, configured to determine, according to the first subframe, a first system frame number corresponding to the radio frame that includes the first subframe, and determine, according to the second subframe, the wireless that includes the second subframe a second system frame number corresponding to the frame, and determining a system frame number difference according to the first system frame number and the second system frame number.
  • the sending unit 303 is configured to report the timing difference to the base station, so that the base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the sending unit 303 can report the time difference according to the reporting manner included in the timing measurement control message when the time difference is sent to the base station, where the reporting manner includes periodic reporting or event reporting.
  • the periodic report is used to trigger the measurement report to be reported when the reporting period arrives.
  • the sending unit 303 reports the serving cell and the neighbor cell to be measured measured by the measuring unit 302 before the reporting period expires. And the time difference between the neighboring cells corresponding to the identifier is reported to the base station;
  • the average of the multiple timing differences measured in the period may be reported to the base station, or the first timing difference of the multiple timing differences measured in the period may also be used.
  • the report is reported to the base station, where the first timing time difference is the most accurate one of the plurality of timing time differences. For example, a more accurate timing difference threshold can be set according to experience, and a timing difference that is closest to the timing time difference threshold among the plurality of timing time differences is determined as the first timing difference.
  • the event report is used to trigger the measurement report report when the trigger event occurs.
  • the time difference of the reference signal in the time difference between the serving cell measured by the terminal and the neighbor cell corresponding to the neighbor cell identifier to be measured When the time difference threshold is greater than the time difference threshold, the sending unit 303 reports the time difference measured by the measuring unit 302 to the base station.
  • the embodiment of the present invention provides a device for timing synchronization between cells, and the timing difference between the serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured measured by the measuring unit, and then the sending unit reports the timing difference to the base station, so that The base station can perform timing adjustment according to the timing difference, achieve timing synchronization with the neighboring cell, and can reduce equipment cost and installation cost.
  • the embodiment of the invention provides another device for timing synchronization between cells, and the device may be a base station.
  • the base station can provide a small base station for serving the serving cell, and the small base station can be a small base station serving the micro-cell Micro Cel l, a small base station serving the pico cell Pico Cel l, or a small serving Femto Cel l Base station, etc.
  • the device includes: a sending unit 401, a receiving unit 402, and an adjusting unit 403;
  • the sending unit 401 is configured to send a timing measurement control message to the terminal, where the timing measurement control message includes a neighboring cell identifier to be measured, so that the terminal measures a time difference between the server cell where the terminal is located and the neighboring cell corresponding to the to-be-measured neighboring cell identifier.
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can know which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the base station has the completion timing measurement.
  • the function of the terminal sends a timing measurement control message, and the terminal that receives the message initiates the timing measurement and performs further operations.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the receiving unit 402 is configured to receive a timing difference sent by the terminal.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the device further includes a first processing unit; after the receiving unit 402 receives the timing difference sent by the terminal, the first processing unit is configured to gradually reduce the power by using the first preset power in steps, until the device is down.
  • the base station After the terminal is not connected, the base station is turned off. The base station is off. The device or module that provides the power transmission function in the base station is closed, so that when the base station adjusts the timing of the serving cell, the terminal in the serving cell can be prevented from dropping.
  • the adjusting unit 403 is configured to adjust the timing of the serving cell according to the timing difference to achieve timing synchronization of the neighboring cell corresponding to the neighbor cell identifier to be measured.
  • the adjusting unit 403 is configured according to the received reference signal time difference and the subframe number difference. And the system frame number difference adjusts the timing time of the serving cell, specifically for:
  • T1 represents the adjusted start time of the subframe
  • TO represents the start time of the adjusted subframe
  • RSTD represents the time difference of the reference signal
  • the device further includes a second processing unit.
  • the second processing unit After the adjusting unit 403 adjusts the timing of the serving cell according to the timing difference, the second processing unit is turned on with the second preset power, and the second preset power is used. The power is gradually increased gradually, and the power is stopped until the power of the device reaches the maximum set power. Stopping when the power of the base station is raised to the maximum set power, the base station can transmit signals at this maximum set power and handle other transactions of the base station.
  • An embodiment of the present invention provides a device for timing synchronization between cells.
  • the receiving unit receives the timing difference sent by the terminal, and the adjusting unit adjusts the timing of the serving cell according to the timing difference, so that timing synchronization with the neighboring cell can be achieved, and the base station can be reduced.
  • the embodiment of the present invention provides a method for timing synchronization between cells.
  • the application scenario of this embodiment is as follows: As shown in FIG. 5, the terminal is located in the coverage area of the serving cell corresponding to the small base station, and each small base station serves one. a cell, where the small base station may be a small base station serving the micro cell of the micro cell, or a small base station serving the pico Cel l, or a small base station serving the Femto Cel l of the home cell;
  • the macro base station may be a service serving the neighboring cell to be measured, and the macro base station may be a macro base station serving Macro Cel l;
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the terminal can know which terminals have the function of completing the timing measurement (that is, the timing difference can be measured).
  • the base station transmits a timing measurement control message to the terminal having the function of completing the timing measurement, and the terminal receiving the message initiates the timing measurement and performs further operations.
  • the method includes the following steps:
  • Step 601 The small base station sends a timing measurement control message to the terminal, where the timing measurement control message includes a neighboring cell identifier to be measured, so that the terminal measures a time difference between the server cell where the server is located and the neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the timing measurement control message includes the neighbor cell identifier to be measured, so that the terminal can measure the timing difference of the neighboring cell and the serving cell to be measured.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • timing measurement control message may further include a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message When the reporting mode is periodic reporting, the timing measurement control message further includes a reporting period; when the reporting mode is an event, the timing measurement control message further includes a time difference threshold.
  • Step 602 The terminal receives a timing measurement control message sent by the small base station, starts timing measurement, and sends a timing measurement control completion message to the small base station.
  • the timing measurement control completion message carries the information that the terminal starts the timing measurement success or failure. When the terminal starts the timing measurement successfully, the subsequent operation is continued. When the terminal starts the timing measurement failure, the terminal needs to be restarted.
  • the timing mechanism used by the terminal to perform timing measurement can be understood as follows: The terminal can know the time when the base station periodically sends a signal according to the received signal sent by the base station, so the terminal can arrive at the time when the base station sends a signal. Time measurement is performed.
  • Step 603 The terminal measures a timing difference between a serving cell where the serving cell is located and a neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the optional radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference.
  • the specific terminal determines the reference signal time difference, the subframe number difference, and the system frame number difference according to the following manners.
  • the terminal may measure the start time of the first subframe of the neighboring cell, and measure the serving cell where the terminal is located. a start time of the second subframe, where the second subframe is a subframe that is closest to the start time of the first subframe from the start time determined in the at least two subframes obtained by measuring the serving cell; Determining a reference signal time difference between a start time of the first subframe and a start time of the second subframe;
  • the first subframe may be any one of a plurality of subframes of the neighboring cell, and the serving cell has multiple subframes, each of which has a starting moment, where, in a plurality of subframes in the serving cell
  • the subframe whose start time is closest to the start time of the first subframe is the second subframe.
  • one subframe can be measured every second, and the start time of the first subframe is used as a standard, and before and after the start time of the first subframe is obtained, in the serving cell.
  • Two subframes are respectively calculated, and the absolute values of the difference between the start time of the two subframes and the start time of the first subframe are respectively calculated, and the subframe corresponding to the absolute value of the smallest difference is determined as the second subframe.
  • the terminal may determine that the first subframe number is determined according to the first subframe, and the second subframe is determined according to the second subframe. a subframe number, and determining a subframe number difference according to the first subframe number and the second subframe number;
  • a radio frame has a period of 10 ms, including 10 subframes, and the subframe numbers are 0, 1, 2, 3, 4, 5, 6, and 7 respectively. , 8, 9 , each subframe includes two time slots.
  • the radio frame is numbered, which is called the system frame number SFN, where the system frame number is represented by 10 bits, and the period is 1024.
  • the synchronization signal is included in the 0th subframe and the 5th subframe in one radio frame, so that the start position of the radio frame can be determined, and the subframe number can be further determined.
  • the terminal may: determine, by the terminal, the first system frame number corresponding to the radio frame of the first subframe according to the first subframe And determining, according to the second subframe, a second system frame number corresponding to the radio frame that includes the second subframe, and determining a system frame number difference according to the first system frame number and the second system frame number.
  • the physical broadcast channel (Phys i ca l Broadca st Channe l , PBCH) is obtained by the terminal, and the system frame number of the cell is obtained, where the system frame number is represented by 10 bits, and the upper 8 bits are directly included in the information carried by the PBCH.
  • the lower 2 bits are included in the scrambling information of the PBCH.
  • determining a system frame number difference according to SFND (Nsfn_L + 1024 - Ns fn_F) mode 1024; wherein, SFND indicates a system frame number difference, Nsfn_L indicates a first system frame number of the neighboring cell, and Nsfn_F indicates a serving cell number Two system frame number.
  • Step 604 The terminal reports the timing difference to the small base station, so that the small base station adjusts the timing of the service cell according to the timing difference, and synchronizes with the neighboring cell.
  • the reporting manner is performed according to the reporting manner in the received timing measurement control message sent by the small base station, where the reporting manner includes periodic reporting or event reporting.
  • the periodic report is used to trigger the measurement report report when the reporting period arrives.
  • the reporting period arrives, the neighboring cell corresponding to the serving cell and the neighbor cell to be measured measured before the reporting period expires is reported.
  • the time difference between the times is reported to the small base station;
  • the average of the multiple timing differences measured in the period may be reported to the base station, or the first timing difference of the multiple timing differences measured in the period may also be used.
  • the report is reported to the base station, where the first timing time difference is the most accurate one of the plurality of timing time differences.
  • a more accurate timing difference threshold can be set according to experience, and a timing difference that is closest to the timing time difference threshold among the plurality of timing time differences is determined to be the first predetermined Time difference.
  • the event report is used to trigger the measurement report report when the trigger event occurs.
  • the time difference of the reference signal in the time difference between the serving cell measured by the terminal and the neighbor cell corresponding to the neighbor cell identifier to be measured When the time difference threshold is greater than the time difference, the measured timing difference is reported to the small base station.
  • Step 605 The small base station receives a timing difference sent by the terminal.
  • the small base station can obtain the timing difference included therein, wherein the timing time difference includes the reference signal time difference, the subframe number difference, and the system frame number difference. After receiving the timing difference reported by the terminal, the timing difference can be saved.
  • Step 606 The small base station gradually reduces the power by using the first preset power as the step size, until the small base station is closed after the terminal has no connected state under the small base station, where the small base station is turned off, the device or module that provides the power transmission function in the small base station is turned off. ;
  • the initial timing adjustment is started, and the time adjustment period of the initial initial timing adjustment is relatively large.
  • the subsequent timing adjustment process is started, and the subsequent timing adjustment is a work that continues in the small base station work phase.
  • the time adjustment is relatively large, which may affect the terminal being served in the serving cell. Therefore, before the initial timing adjustment is performed in this embodiment, the small base station is smoothly closed, and after the initial timing adjustment is completed, Then the base station is smoothly turned on.
  • the macro network When the small base station is deployed and put into service, the macro network is mature and can continue to provide services, and the macro base station has good coverage throughout the service area.
  • the small base station and the macro base station are deployed at the same frequency, the macro base station and the small base station have strong mutual interference in the coverage area of the small base station, and the signal of the small base station is strong, and the terminal in the area is served by the 'J, the base station.
  • the terminals in the coverage area of the small base station are served by the macro base station.
  • the terminals trigger the handover from the macro base station to the small base station, and the terminal that is too close to the small base station is interfered by the small base station too. Strong, the downlink quality of the macro base station is too poor to successfully receive the macro base station.
  • the terminal covered by the small base station is served by the small base station.
  • the terminals Before the small base station is turned off, the terminals can be switched to the macro base station in advance, and the macro base station provides the service. However, the terminal that is too close to the small base station is too strong to be interfered by the small base station, and the downlink quality of the macro base station is too poor. After the macro base station is not working properly, it can only be served by the small base station. When the small base station is turned off, the part of the terminal is dropped due to the absence of the small base station signal.
  • the small base station when the small base station is turned on, and before the timing adjustment, the small base station can be closed in a smooth closed manner to avoid terminal dropped calls within the coverage of the small base station.
  • the method for shutting down the small base station in a smooth closed manner can be specifically referred to the schematic diagram shown in FIG.
  • the small base station gradually reduces the power in steps of the first preset power, and after the terminal has no connected state in the small base station, and then closes, step 607 is continued to adjust the timing of the serving cell.
  • Step 607 The small base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization of the neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the initial timing adjustment is performed.
  • the small base station only sends out the message, that is, only the device or module that provides the power transmission function in the small base station is turned off, and the device such as the processor in the small base station can be used. Perform initial timing adjustments.
  • the small base station adjusts its own timing time according to the received timing difference, that is, adjusts the start time of the subframe, the subframe number, and the system frame number. It should be noted that the small base station can adjust the timing information of any subframe in the service cell to achieve synchronization with the neighboring cell corresponding to the neighboring d and the area identifier to be measured.
  • the small base station can adjust the start time of the subframe of the serving cell according to the time difference of the reference signal in the timing time difference. Specifically, the following manner can be adopted:
  • T1 represents the adjusted start time of the subframe
  • TO represents the start time of the adjusted subframe
  • RSTD represents the time difference of the reference signal
  • the small base station can adjust the subframe number of the serving cell according to the subframe difference in the timing time difference, and the specific manner can be as follows:
  • the small base station can adjust the system frame number of the serving cell according to the system frame number difference in the timing time difference. Specifically, the following method can be adopted:
  • Step 608 The small base station is turned on with the second preset power, and the power is gradually increased by using the second preset power as the step size, until the power of the small base station reaches the maximum set power, and the power is stopped.
  • the small base station can be turned on in a smooth open manner to continue to provide services for terminals in the coverage of the small base station.
  • the method for starting the small base station in a smooth open manner may be specifically referred to the schematic diagram shown in FIG. 8.
  • the small base station is turned on with the second preset power, and the power is gradually increased by using the second preset power as the step size. After the power of the small base station reaches the maximum set power, the power is stopped, and then step 609 is continued.
  • Step 609 Perform subsequent timing adjustment during normal operation of the small base station.
  • the process of the subsequent timing adjustment is a process in which the terminal measures the timing difference between the serving cell and the neighboring cell, and reports it to the base station, and the base station performs timing adjustment according to the timing difference.
  • the embodiment of the invention provides a method for timing synchronization between cells.
  • the small base station By measuring the timing difference between the serving cell and the neighboring cell, the small base station adjusts the timing according to the timing difference, thereby reducing device cost and installation cost, and implementing inter-cell Timing synchronization.
  • the method for shutting down the small base station in a smooth closed manner as shown in FIG. 7, the method includes the following steps:
  • Step 701 The small base station decreases the first preset power at the currently used power, so that the terminal within the coverage of the small base station can trigger the handover.
  • the first preset power setting needs to meet the following conditions: First, when the small base station reduces power, the terminal at the edge of the small base station is not interfered by the large macro base station; second, when the first condition is met, The first preset power is as large as possible, so that the process of closing the small base station is as short as possible, and the work efficiency is improved. Rate.
  • Step 702 starting a timer to perform timing
  • the duration of the timer needs to meet the following conditions: First, the macro base station has enough time to trigger the handover to the base station; second, when the first condition is met, the duration of the timer is as short as possible, so that the small base station is closed as much as possible short.
  • Step 703 Determine whether to trigger handover of the terminal in the coverage of the small base station
  • Step 704 When triggering handover of any terminal in the coverage of the small base station, performing handover, so that the terminal is served by the macro base station, and restarting the timer again;
  • Step 705 When the handover of the terminal in the coverage of the small base station is not triggered, further determining whether the timer expires;
  • Step 706 When the timer expires, further determining whether there is a terminal in the coverage state of the small base station coverage area;
  • step 701 is performed to further reduce the first preset power at the current power
  • Step 707 When the small base station covers the terminal with no connection status within the coverage area, the small base station is directly closed, and the operation flow is ended.
  • the method for enabling the small base station in a smooth open manner includes the following steps:
  • Step 801 The small base station is enabled with a second preset power, so that the small base station can continue to provide services for terminals in its coverage area;
  • the setting of the second preset power needs to meet the following conditions: When the base station is turned on, it is almost incorrect. The terminal closest to the base station causes a large interference, and the terminal is served by the macro base station. Step 802, starting a timer to perform timing;
  • the setting of the duration of the timer needs to meet the following conditions: First, the terminal served by the macro base station has sufficient time to trigger the handover to the small base station; second, when the first condition is met, the duration of the timer is as short as possible. In order to make the small base station open process as short as possible.
  • Step 803 Determine whether to trigger handover of the terminal in the coverage of the macro base station
  • the small base station and the macro base station When the small base station and the macro base station are deployed at the same frequency, the macro base station and the small base station have strong mutual interference in the small base station coverage area, the signal of the small base station is strong, and the terminal of the small base station coverage area is served by the small base station. At this time, when the small base station is turned on, the terminal at the edge of the macro base station in the macro base station can be triggered to switch to the small base station.
  • Step 804 When triggering handover of the terminal in the coverage of the macro base station, the small base station performs handover, so that the terminal is served by the small base station, and restarts the timer again;
  • Step 805 When the handover of the terminal in the coverage of the macro base station is not triggered, further determining whether the timer expires;
  • Step 806 When the timer expires, the second preset power is raised under the current power.
  • the power of the base station is sequentially increased by using the second preset power as a step.
  • Step 807 determining whether the current power reaches the maximum set power
  • step 702 When the current power does not reach the maximum set power, proceed to step 702 to further perform terminal switching;
  • Step 808 When the current power reaches the maximum set power, the small base station is successfully turned on, and the small base station can provide the service, and the current process is closed. When the power of the small base station is raised to the maximum set power, the small base station can transmit the signal at this maximum set power and process other transactions of the base station.
  • An embodiment of the present invention provides a device for timing synchronization between cells.
  • the device includes: a receiving unit 901, a measuring unit 902, a measuring module 9021, a first determining module 9022, and a second determining module 9023.
  • the third determining module 9024 is a transmitting unit 903.
  • the device may be a terminal, and the terminal may be a terminal located at the edge of the serving cell where the cell is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the receiving unit 901 is configured to receive a timing measurement control message sent by the base station, and start a timing measurement, where the timing measurement control message includes a neighbor cell identifier to be measured.
  • the timing measurement control message may further include a reporting manner, where the reporting manner includes periodic reporting or event reporting.
  • the reporting mode is periodic reporting
  • the timing measurement control message further includes a reporting period, and when the reporting manner is an event reporting, timing The time difference threshold is also included in the measurement control message.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the base station may be a small base station serving the serving cell where the terminal is located, and the small base station may be a small base station serving the micro cell of the micro cell, or a small base station serving the pico Cel l, or A small base station serving the family cell Femto Cel l.
  • the macro base station serving the neighboring cell to be measured may be a macro base station serving Macro Cel l.
  • the timing mechanism used by the receiving unit 901 to start timing measurement can be understood as follows:
  • the receiving unit 901 can learn the time when the base station periodically sends a signal according to the received signal sent by the base station, so the terminal can send the base station at the base station. When the time of the signal comes, the timing measurement is performed.
  • the measuring unit 902 is configured to measure a timing difference between the serving cell and the neighboring cell corresponding to the identifier of the neighboring cell to be measured;
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference;
  • the measurement module in the measuring unit 902 The first subframe of the neighboring cell is measured, and the start time of the second subframe of the serving cell is measured, where the second subframe is at least two obtained from measuring the serving cell. a subframe in which the determined start time is closest to the start time of the first subframe;
  • the first subframe may be any one of a plurality of subframes of the neighboring cell, and the serving cell has multiple subframes, each of which has a starting moment, where, in a plurality of subframes in the serving cell
  • the subframe whose start time is closest to the start time of the first subframe is the second subframe.
  • two subframes can be measured every second in the chronological order, and two subframes before and after the first subframe start time in the serving cell are obtained according to the starting moment of the first subframe, and The absolute values of the differences between the start times of the two subframes and the start time of the first subframe are respectively calculated, and the subframe corresponding to the absolute value of the smallest difference is determined as the second subframe.
  • the measurement module 9021 measures the start time of the first subframe of the neighboring cell, and after measuring the start time of the second subframe of the serving cell, the first determining module 9022 in the measuring unit 902 is configured to be used according to the first subframe.
  • the Tsubf rameRxL indicates the start time of the first subframe of the neighboring cell
  • the Tsubf rameRxF indicates the start time of the second subframe of the serving cell;
  • the second determining module 9023 in the measuring unit 902 is configured to determine the first subframe number according to the first subframe, and determine the second subframe number according to the second subframe. And determining a subframe number difference according to the first subframe number and the second subframe number;
  • the third determining module 9024 in the measuring unit 902 is configured to determine, according to the first subframe, a first system frame number corresponding to the radio frame that includes the first subframe, and according to the first subframe Determining, by the second subframe, a second system frame number corresponding to the radio frame of the second subframe, and determining a system frame number difference according to the first system frame number and the second system frame number;
  • the second system frame number of the cell is configured to determine, according to the first subframe, a first system frame number corresponding to the radio frame that includes the first subframe, and according to the first subframe Determining, by the second subframe
  • the sending unit 903 is configured to report the timing difference to the base station, so that the base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the sending unit 903 sends the time difference to the base station
  • the time difference may be reported according to the reporting manner included in the timing measurement control message, where the reporting manner includes periodic reporting or event reporting.
  • the sending unit 903 is configured to: when the reporting period arrives, trigger the measurement report to report, and report the timing difference to the base station, that is, the sending unit 903 reports the time difference measured by the measuring unit 902 before the reporting period arrives.
  • Base station
  • the average of the multiple timing differences measured in the period may be reported to the base station, or the first timing difference of the multiple timing differences measured in the period may also be used.
  • the report is reported to the base station, where the first timing time difference is the most accurate one of the plurality of timing time differences.
  • a more accurate timing difference threshold may be set according to experience, and a timing difference that is closest to the timing time difference threshold among the plurality of timing time differences is determined as the first timing difference.
  • the sending unit 903 is configured to: when the time difference of the reference signal in the time difference is greater than the time difference threshold, trigger the measurement report to be reported, that is, the sending unit 903 reports the time difference measured by the measuring unit 902 to the base station.
  • An embodiment of the present invention provides a device for timing synchronization between cells, where a measurement unit measures a timing difference between a serving cell and a neighboring cell, and the sending unit sends the timing difference to the base station, so that the base station performs timing adjustment according to the timing difference.
  • the timing synchronization with the neighboring cell is achieved, and the cost and installation cost of the installed device can be reduced.
  • the embodiment of the invention provides a device for timing synchronization between cells, and the device may be a base station.
  • the base station may be a small base station serving the serving cell, and the small base station may be a small base station serving the micro cell Micro Cel l, a small base station serving the pico cell Pico Cel l, or a serving home cell Femto Cel l Small base stations, etc.
  • the device includes: a sending unit 1001, a receiving unit 1002, an adjusting unit 1003, a first processing unit 1004, and a second processing unit 1005.
  • the sending unit 1001 is configured to send a timing measurement control message to the terminal, and the timing measurement is performed.
  • the control message includes the identifier of the neighboring cell to be measured, so that the terminal measures the time difference between the server cell where the terminal is located and the neighboring cell corresponding to the neighboring node J and the area identifier.
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can learn which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the sending unit 1001 in the base station.
  • the timing measurement control message is sent to the terminal having the function of completing the timing measurement, and the terminal receiving the message starts the timing measurement and performs further operations.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the macro base station is provided for serving the neighboring cell to be measured, and the macro base station may be a macro base station serving Macro Cel l.
  • the receiving unit 1002 is configured to receive a timing difference sent by the terminal.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference;
  • the device can save the received timing difference.
  • the device further includes a first processing unit 1004, configured to use the first preset power.
  • the power is gradually reduced for the step size, and the base station is turned off after the terminal has no connected state under the device, wherein the base station off refers to the device or module that provides the power transmission function in the base station is closed; the closed base station is closed in a smooth manner to make the base station coverage
  • the terminal inside is avoided Words.
  • the adjusting unit 1003 is configured to adjust a timing time of the serving cell according to the timing difference to achieve timing synchronization of the neighboring cell corresponding to the neighbor cell identifier to be measured.
  • the adjusting unit 1003 adjusts the timing time of the service cell according to the received reference signal time difference, the subframe number difference, and the system frame number difference.
  • RSTD represents the time difference of the reference signal;
  • the device further includes: a second processing unit 1005, configured to be enabled by using the second preset power, and gradually increasing by using the second preset power. Power, stop power up until the device's power reaches the maximum set power.
  • the base station is not required to be adjusted after the base station is turned off, and the subsequent timing adjustment needs to be completed by the receiving unit 1002 and the adjustment unit 1003.
  • An embodiment of the present invention provides a device for timing synchronization between cells, which adjusts a timing of a serving cell by using a timing difference received by a receiving unit to achieve timing synchronization of a neighboring cell corresponding to a neighboring cell identifier to be measured, and does not need to be Installing equipment such as GPS on the base station can reduce equipment cost and installation cost.
  • the embodiment of the present invention provides a terminal.
  • the terminal includes: a receiver 1101, a processor 1102, and a transmitter 1103.
  • the terminal may be located at the edge of the serving cell where the terminal is located.
  • the terminal of the neighboring cell is measured, and has a function of timing measurement, which is a measurement timing difference.
  • the receiver 1101 is configured to receive a timing measurement control message sent by the base station, and start a timing measurement, where the timing measurement control message includes a neighbor cell identifier to be measured.
  • the timing measurement control message may further include a reporting manner, where the reporting manner includes periodic reporting or event reporting;
  • the timing measurement control message When the reporting mode is periodic reporting, the timing measurement control message further includes a reporting period. When the reporting mode is an event reporting, the timing measurement control message further includes a time difference threshold.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and the measurement may be performed according to the signal of the macro base station when performing the time measurement, so that the number of neighboring cells to be measured is one.
  • the base station may be a small base station serving the serving cell where the terminal is located, and the small base station may be a small base station serving the micro cell of the micro cell, or a small base station serving the pico Cel l, or A small base station serving the family cell Femto Cel l.
  • the macro base station serving the neighboring cell to be measured may be a macro base station serving Macro Cel l.
  • the processor 1102 is configured to measure a timing difference between a serving cell and a neighboring cell corresponding to the identifier of the neighboring cell to be measured.
  • the timing difference can be the timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference;
  • the processor 1102 when determining the time difference of the reference signal, is configured to: measure a start time of the first subframe of the neighboring cell, and measure a start time of the second subframe of the serving cell, where the The second subframe is a subframe that is closest to a start time of the first subframe from a start time determined in at least two subframes obtained by measuring the serving cell;
  • the first subframe may be any one of a plurality of subframes of the neighboring cell, and the serving cell has multiple subframes, each of which has a starting moment, where, in a plurality of subframes in the serving cell
  • the subframe whose start time is closest to the start time of the first subframe is the second subframe.
  • one subframe can be measured every second, and the start time of the first subframe is used as a standard.
  • the processor 1102 when determining the system frame number difference, is configured to: determine, according to the first subframe, a first system frame number corresponding to the radio frame that includes the first subframe, and determine, according to the second subframe, the inclusion a second system frame number corresponding to the radio frame of the second subframe, and determining a system frame number difference according to the first system frame number and the second system frame number.
  • the transmitter 1103 is configured to report the timing difference to the base station, so that the base station adjusts the timing of the serving cell according to the timing difference to achieve timing synchronization with the neighboring cell.
  • the time difference can be reported according to the reporting manner included in the timing measurement control message, where the reporting manner includes periodic reporting or event reporting.
  • the transmitter 1103 is configured to: when the reporting period arrives, trigger the measurement report to report, and report the timing difference to the base station, that is, the transmitter 1103 reports the timing difference measured by the processor 11 02 before the reporting period arrives. To the base station;
  • multiple measurements may be performed in this cycle.
  • the average of the timing differences is reported to the base station, or the first timing difference of the plurality of timing differences measured in the period may be reported to the base station, where the first timing difference is the most accurate one of the plurality of timing differences.
  • a more accurate timing time difference threshold may be set according to experience, and a timing time difference that is closest to the timing time difference threshold among the plurality of timing time differences is determined as the first timing time difference.
  • the transmitter 1103 is configured to trigger the measurement report report when the time difference of the reference signal in the time difference is greater than the time difference threshold, and report the time difference to the base station.
  • the embodiment of the present invention provides a terminal, which measures a timing difference between a serving cell and a neighboring cell by using a processor, and sends a timing difference to the base station by the transmitter, so that the base station performs timing adjustment according to the timing difference to reach the neighboring cell timing. Synchronization, and can reduce the cost and installation cost of the installed equipment
  • the embodiment of the present invention provides a base station, where the base station can be a small base station serving the serving cell, and the small base station can be a small base station serving the micro cell of the micro cell, or a small base station of the Pico Cel l serving the cell. It is a small base station serving the family cell Femto Cel l. As shown in FIG. 12, the base station includes: a transmitter 1201, a receiver 1202, and a processor 1203.
  • the transmitter 1201 is configured to send a timing measurement control message to the terminal, where the timing measurement control message includes a neighbor cell identifier to be measured, so that the terminal measures a time difference between the server cell where the terminal is located and the neighbor cell corresponding to the to-be-measured neighbor cell identifier.
  • the terminal may be a terminal located at the edge of the serving cell where it is located, close to the neighboring cell to be measured, and has a function of timing measurement, which is a measurement timing difference.
  • the system reports the system version to the base station.
  • the base station obtains the system version reported by each terminal, it can learn which terminals have the function of completing the timing measurement (that is, the timing difference can be measured), and then the transmitter 1201 in the base station.
  • the timing measurement control message is sent to the terminal having the function of completing the timing measurement, and the terminal receiving the message starts the timing measurement and performs further operations.
  • the neighboring cell to be measured may be a macro cell served by the macro base station, and may perform measurement according to the signal of the macro base station when performing timing measurement, so it can be understood as the neighboring cell to be measured.
  • the number is one.
  • the macro base station serving the neighboring cell to be measured, and the macro base station may be a macro base station serving the Macro Ce ll.
  • the receiver 1202 is configured to receive a timing difference sent by the terminal.
  • the timing difference may be a timing difference of the radio frame level.
  • the timing difference of the radio frame level may include a reference signal time difference, a subframe number difference, and a system frame number difference;
  • the device can save the received timing difference.
  • the processor 1203 is configured to gradually reduce the step by using the first preset power. Power, until the device has no connected state, the base station is turned off, where the base station off refers to the device or module that provides the power transmission function in the base station is closed; the closed base station in the smooth closed mode can prevent the terminal in the coverage of the base station from being avoided. words.
  • the processor 1203 is further configured to: adjust a timing time of the serving cell according to the timing difference to synchronize timing of the neighboring cell corresponding to the neighbor cell identifier to be measured.
  • the processor 1203 adjusts the timing of the serving cell according to the received reference signal time difference, the subframe number difference, and the system frame number difference.
  • RSTD represents the time difference of the reference signal;
  • the base station needs to be turned on to enable the base station to work normally, and the processor 1203 is further configured to start with a second preset power, and gradually increase the power by using the second preset power in steps, until the power of the device reaches Stop increasing power when the maximum power is set.
  • the processor 1203 is further configured to start with a second preset power, and gradually increase the power by using the second preset power in steps, until the power of the device reaches Stop increasing power when the maximum power is set.
  • subsequent timing adjustments are required, and the subsequent timing adjustment is small. Therefore, the base station is not required to be adjusted after the base station is turned off.
  • the subsequent timing adjustment needs to be measured by the processor 1203 to measure the time difference between the serving cell and the neighboring cell. It is reported to the base station, so that the base station performs the completion time adjustment according to the timing difference.
  • the embodiment of the present invention provides a base station, where the timing of the received time difference is adjusted by the processor to adjust the timing of the serving cell to achieve synchronization with the neighboring cell corresponding to the to-be-measured neighboring cell identifier, and does not need to install GPS on the base station.
  • Equipment can reduce equipment cost and installation cost.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as the cells may or may not be physical. Units can be located in one place, or they can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, dedicated hardware, dedicated CPU, dedicated memory, dedicated memory, Special components are used to achieve this, but in the case of more than 4, the former is a better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • U disk mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Acces s Memory), disk or optical disk, etc., including a number of instructions to make a computer device (can It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.
  • a computer device can It is a personal computer, a server, or a network device, etc.

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Abstract

本发明公开一种小区之间定时同步的方法及装置，涉及通信网络技术领域，可以实现小区间的定时同步，并且降低设备成本、安装成本。本发明实施例提供的方案，通过终端接收基站发送的定时测量控制消息，启动定时测量，测量服务小区与所述待测量邻小区标识对应的邻小区之间的定时时间差，终端将所述定时时间差上报给所述基站，所述基站根据所述定时时间差调整服务小区的定时，达到与所述邻小区定时同步。本发明实施例提供的方案适用于小区之间进行定时同步。

Description

一种小区之间定时同步的方法及装置 技术领域
本发明涉及通信网络技术领域， 尤其涉及一种小区之间定时同步的方法 及装置。 背景技术
在基站开始工作前， 对每个基站配置一个绝对时刻， 并将此时刻设置在 全球定位***（Globa l Pos i t ion Sys tem, GPS )上， 例如， 2010年 1月 1 日 中午 12时为基站中***帧号 （Sys tem Frame Number , SFN ) 为 0, 子帧号为 0的子帧的起始时刻。通过基站中的 GPS获取当前绝对时刻， 然后基站根据配 置的绝对时刻和获取的当前绝对时刻， 计算得出当前的小区时间定时， 即分 别计算出此基站的***帧号和子帧号。 由于各个基站的绝对时刻相同， 因此 计算得出的小区时间定时也是一致的， 可以根据当前的小区时间定时修改小 区当前的***帧号和子帧号， 实现小区之间的定时同步。
然而， 采用现有技术进行定时同步时， 每个基站都需要 GPS硬件以及安 装 GPS 天线， 导致设备成本、 安装成本较高， 并且当基站部署在室内时， 无 法获取 GPS信号， 导致不能实现定时同步。
发明内容
本发明的实施例提供一种小区之间定时同步的方法及装置， 可以实现小 区间的定时同步， 并且降低设备成本、 安装成本。
一方面， 本发明的实施例提供一种小区之间定时同步的方法， 包括： 终端接收基站发送的定时测量控制消息， 启动定时测量， 所述定时测量 控制消息中包括待测量邻小区标识；
所述终端测量服务小区与所述待测量邻小区标识对应的邻小区之间的定 时时间差； 所述终端将所述定时时间差上报给所述基站， 以便所述基站根据所述定 时时间差调整所述月良务小区定时时间， 达到与所述邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差。
在本发明另一实施例中， 所述终端测量服务小区与所述待测量邻小区标 识对应的邻小区之间的定时时间差包括：
所述终端测量所述邻小区的第一子帧的起始时刻， 以及测量所述服务小 区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区获得 的至少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子帧； 所述终端根据所述第一子帧的起始时刻与所述第二子帧的起始时刻确定 所述参考信号时间差；
所述终端根据所述第一子帧确定所述第一子帧号， 以及根据所述第二子 帧确定所述第二子帧号， 并根据所述第一子帧号和所述第二子帧号确定所述 子帧号差；
所述终端根据所述第一子帧确定包含所述第一子帧的无线帧对应的第一 ***帧号， 以及根据所述第二子帧确定包含所述第二子帧的无线帧对应的第 二***帧号， 并根据所述第一***帧号和所述第二***帧号确定所述***帧 号差。
在本发明另一实施例中， 所述定时测量控制消息中还包括上报方式， 所 述上报方式包括周期上报或者事件上报；
当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上 报周期；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时 间差门限。
所述将所述定时时间差上报给所述基站包括：
当所述上报方式为所述周期上报时， 当所述上报周期到达时触发测量报 告上报， 所述终端将所述定时时间差上报给所述基站； 当所述上报方式为所述事件上报时， 当所述定时时间差中所述参考信号 时间差大于所述时间差门限时触发测量报告上报， 所述终端将所述定时时间 差上报给所述基站。
另一方面， 本发明实施例提供一种小区之间定时同步的方法， 包括： 基站向终端发送定时测量控制消息， 所述定时测量控制消息中包括待测 量邻小区标识， 以便所述终端测量所述终端所在的服务器小区与所述待测量 邻小区标识对应的邻小区之间的定时时间差；
所述基站接收所述终端发送的所述定时时间差；
所述基站根据所述定时时间差调整服务小区的定时时间， 以达到与所述 待测量邻小区标识对应的邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差。
在本发明另一实施例中， 所述基站根据所述定时时间差调整服务小区的 定时时间包括：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1表示调整后的子 帧起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表示所述参考信 号时间差；
根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， 所述 SBFN1 表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表示所 述子帧号差；
根据 SFN1 = (SFN0 + SFND) mode 1 024调整***帧号； 其中， 所述 SFN1 表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND表示 所述***帧号差。
在本发明另一实施例中， 在所述根据所述定时时间差调整服务小区的定 时时间之前， 还包括：
基站以第一预设功率为步长逐步降低功率， 直到所述基站下没有连接态 的终端后关闭； 在所述根据所述定时时间差调整服务小区的定时之后， 还包括： 基站以第二预设功率开启， 并以所述第二预设功率为步长逐步提升功率， 直到所述基站的功率达到最大设定功率时停止提升功率。
另一方面， 本发明实施例提供一种小区之间定时同步的装置， 包括： 接收单元， 用于接收基站发送的定时测量控制消息， 启动定时测量， 所 述定时测量控制消息中包括待测量邻小区标识；
测量单元， 用于测量服务小区与所述待测量邻小区标识对应的邻小区之 间的定时时间差；
发送单元， 用于将所述定时时间差上报给所述基站， 以便所述基站根据 所述定时时间差调整所述服务小区的定时时间， 达到与所述邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差。
在本发明另一实施例中， 所述测量单元包括：
测量模块， 用于测量所述邻小区的第一子帧的起始时刻， 以及测量所述 服务小区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小 区获得的至少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的 子帧；
第一确定模块， 用于根据所述第一子帧的起始时刻与所述第二子帧的起 始时刻确定所述参考信号时间差；
第二确定模块， 用于根据所述第一子帧确定所述第一子帧号， 以及根据 所述第二子帧确定所述第二子帧号， 并根据所述第一子帧号和所述第二子帧 号确定所述子帧号差；
第三确定模块， 用于根据所述第一子帧确定包含所述第一子帧的无线帧 对应的第一***帧号， 以及根据所述第二子帧确定包含所述第二子帧的无线 帧对应的第二***帧号， 并根据所述第一***帧号和所述第二***帧号确定 所述***帧号差。
在本发明另一实施例中， 所述定时测量控制消息中还包括上报方式， 所 述上报方式包括周期上报或者事件上报；
当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上 报周期；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时 间差门限。
在本发明另一实施例中， 所述发送单元用于：
当所述上报方式为所述周期上报时， 当所述上报周期到达时触发测量报 告上报， 将所述定时时间差上报给所述基站；
以及当所述上报方式为所述事件上报时， 当所述定时时间差中所述参考 信号时间差大于所述时间差门限时触发测量报告上报， 将所述定时时间差上 报给所述基站。
另一方面， 本发明实施例提供一种小区之间定时同步的装置， 包括： 发送单元， 用于向终端发送定时测量控制消息， 所述定时测量控制消息 中包括待测量邻小区标识， 以便所述终端测量所述终端所在的服务器小区与 所述待测量邻 ^、区标识对应的邻小区之间的定时时间差；
接收单元， 用于接收所述终端发送的所述定时时间差；
调整单元， 用于根据所述定时时间差调整服务小区的定时时间， 以达到 与所述待测量邻小区标识对应的邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差。
在本发明另一实施例中， 所述调整单元用于：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1表示调整后的子 帧起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表示所述参考信 号时间差；
根据 SBFN1 = (SBFN0 + SBFND) mode 10调整子帧号； 其中， 所述 SBFN1 表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表示所 述子帧号差； 根据 SFN1 = (SFNO + SFND) mode 1 024调整***帧号； 其中， 所述 SFN1 表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND表示 所述***帧号差。
在本发明另一实施例中， 所述装置还包括：
第一处理单元， 用于以第一预设功率为步长逐步降低功率， 直到所述装 置下没有连接态的终端后关闭；
第二处理单元， 用于以第二预设功率开启， 并以所述第二预设功率为步 长逐步提升功率， 直到所述装置的功率达到最大设定功率时停止提升功率。
另一方面， 本发明实施例提供一种终端， 包括：
接收器， 用于接收基站发送的定时测量控制消息， 启动定时测量， 所述 定时测量控制消息中包括待测量邻小区标识；
处理器， 用于测量服务小区与所述待测量邻小区标识对应的邻小区之间 的定时时间差；
发送器， 用于将所述定时时间差上报给所述基站， 以便所述基站根据所 述定时时间差调整所述服务小区的定时时间， 达到与所述邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差； 所述处理器用于， 测量所述邻小区的第一子帧的起始时刻， 以及测量所述服 务小区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区 获得的至少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子 帧；
以及根据所述第一子帧的起始时刻与所述第二子帧的起始时刻确定所述 参考信号时间差；
以及根据所述第一子帧确定所述第一子帧号， 以及根据所述第二子帧确 定所述第二子帧号， 并根据所述第一子帧号和所述第二子帧号确定所述子帧 号差；
以及根据所述第一子帧确定包含所述第一子帧的无线帧对应的第一*** 帧号， 以及根据所述第二子帧确定包含所述第二子帧的无线帧对应的第二系 统帧号， 并根据所述第一***帧号和所述第二***帧号确定所述***帧号差。
在本发明另一实施例中， 定时测量控制消息中还包括上报方式， 所述上 报方式包括周期上报或者事件上报；
当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上 报周期； 所述处理器还用于， 当所述上报周期到达时触发测量报告上报， 将 所述定时时间差上报给所述基站；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时 间差门限； 所述处理器还用于， 当所述定时时间差中所述参考信号时间差大 于所述时间差门限时触发测量报告上报， 将所述定时时间差上报给所述基站。
另一方面， 本发明实施例一种基站， 其特征在于， 包括：
发送器， 用于向终端发送定时测量控制消息， 所述定时测量控制消息中 包括待测量邻小区标识， 以便所述终端测量所述终端所在的服务器小区与所 述待测量邻小区标识对应的邻小区之间的定时时间差；
接收器， 用于接收所述终端发送的所述定时时间差；
处理器， 用于根据所述定时时间差调整服务小区的定时时间， 以达到与 所述待测量邻小区标识对应的邻小区定时同步。
在本发明另一实施例中， 所述定时时间差包括无线帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号差和***帧号差； 所述处理器用于： 根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1表 示调整后的子帧起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表 示所述参考信号时间差；
以及根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， 所述 SBFN1表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表 示所述子帧号差；
以及根据 SFN1 = (SFN0 + SFND) mode 1 024调整***帧号； 其中， 所述 SFN1表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND 表示所述***帧号差。
在本发明另一实施例中， 所述处理器还用于：
以第一预设功率为步长逐步降低功率， 直到所述基站下没有连接态的终 端后关闭；
以及， 以第二预设功率开启， 并以所述第二预设功率为步长逐步提升功 率， 直到所述基站的功率达到最大设定功率时停止提升功率。
本发明实施例提供一种小区之间定时同步的方法及装置， 通过接收基站 发送的定时测量控制消息， 启动定时测量， 所述定时测量控制消息中包括待 测量邻小区标识； 测量服务小区与所述待测量邻小区标识对应的邻小区之间 的定时时间差； 将所述定时时间差上报给所述基站， 以便所述基站根据所述 定时时间差调整所述 Λ良务小区的定时时间， 达到与所述邻小区定时同步。 与 现有技术中每个基站都需要 GPS硬件以及安装 GPS天线， 导致设备成本、 安 装成本较高， 并且当基站部署在室内时， 无法获取 GPS信号， 导致不能实现 定时同步相比， 本发明实施例提供的方案通过测量服务小区与邻小区之间的 定时时间差， 基站再根据定时时间差进行调整定时， 可以实现小区间的定时 同步， 并且降低设备成本、 安装成本。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面 描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例 1提供的一种小区之间定时同步的方法的流程图； 图 2为本发明实施例 1提供的另一种小区之间定时同步的方法的流程图； 图 3为本发明实施例 1提供的一种小区之间定时同步的装置的框图； 图 4为本发明实施例 1提供的另一种小区之间定时同步的装置的框图； 图 5为本发明实施例 2提供的终端、 服务小区、 邻小区之间关系的示意 图； 图 6为本发明实施例 2提供的一种小区之间定时同步的方法的流程图； 图 7为本发明实施例 2提供的平滑关闭基站的示意图；
图 8为本发明实施例 2提供的平滑开启基站的示意图；
图 9为本发明实施例 2提供的一种小区之间定时同步的装置的框图； 图 10为本发明实施例 2提供的另一种小区之间定时同步的装置的框图； 图 11为本发明实施例 3提供的一种终端的框图；
图 12为本发明实施例 3提供的一种基站的框图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而 不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作 出创造性劳动前提下所获得的所有其他实施例 , 都属于本发明保护的范围。
实施例 1
本发明实施例提供一种小区之间定时同步的方法， 如图 1 所示， 该方法 包括一下步骤：
步骤 101 , 终端接收基站发送的定时测量控制消息， 启动定时测量， 定时 测量控制消息中包括待测量邻小区标识；
在本实施例中， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻 小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间差。 比 如， 终端上线后， 向基站上报自己的***版本， 基站获得各个终端上报的系 统版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间 差） 的功能， 然后基站向具备完成定时测量的功能的终端发送定时测量控制 消息， 接收到此消息的终端启动定时测量， 并进行进一步的操作。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
本实施例中， 基站可以为终端所在的服务小区提供服务的小基站， 小基 站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pi co Cel l 的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等。 另外， 为待测量 邻小区提供服务的可以为宏基站， 宏基站可以为服务 Macro Cel l的宏基站。
在本实施例中， 终端进行定时测量时采用的定时机制可以理解为： 终端 根据接收到的基站发送的信号， 可以获知此基站定时发送信号的时间， 因此 终端可以在此基站发送信号的时间到来时， 进行定时测量。
进一步可选的， 定时测量控制消息中还可以包括上报方式， 该上报方式 包括周期上报或者事件上报；
当上报方式为周期上报时， 定时测量控制消息中还包括上报周期； 当上>¾方式为事件上 ^艮时， 定时测量控制消息中还包括时间差门限。 步骤 102 ,终端测量服务小区与待测量邻小区标识对应的邻小区之间的定 时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。
可选的， 无线帧级的定时时间差可以包括参考信号时间差 （Reference S igna l Time Difference , RSTD )、 子 †贞 号差 ( Subf rame Number Difference, SBFND )和***帧号差 ( Sys tem Frame Number Difference, SFND )。
进一步可选的， 终端测量服务小区与待测量邻小区标识对应的邻小区之 间的定时时间差， 即终端测量服务小区与待测量邻小区标识对应的邻小区之 间的参考信号时间差、 子帧号差以及***帧号差。
其中， 终端测量服务小区与待测量邻小区标识对应的邻小区之间的参考 信号时间差时， 具体可以为： 终端测量邻小区的第一子帧的起始时刻， 以及 测量终端所在的服务小区的至少一个子帧的起始时刻， 并确定第二子帧的起 始时刻， 其中， 第二子帧为从测量所述服务小区获得的至少两个子帧中确定 的起始时刻与第一子帧的起始时刻最近的子帧； 终端根据第一子帧的起始时 刻与第二子帧的起始时刻确定参考信号时间差；
进一步可选的， 终端测量服务小区与待测量邻小区标识对应的邻小区之 间的子帧号差时， 具体可以为： 终端根据第一子帧确定第一子帧号， 以及根 据第二子帧确定第二子帧号， 并根据第一子帧号和第二子帧号确定子帧号差； 进一步可选的， 终端测量服务小区与待测量邻小区标识对应的邻小区之 间的***帧号差时， 具体可以为： 终端根据第一子帧确定包含第一子帧的无 线帧对应的第一***帧号， 以及根据第二子帧确定包含第二子帧的无线帧对 应的第二***帧号， 并根据第一***帧号和第二***帧号确定***帧号差。
步骤 103 , 终端将定时时间差上报给基站， 以便基站根据定时时间差调整 服务小区的定时时间， 达到与邻小区定时同步。
进一步可选的， 终端将定时时间差上报给基站时， 可以根据定时测量控 制消息中包括的上报方式上报定时时间差， 其中， 上报方式包括周期上报或 者事件上报。
具体的， 周期上报用于当上报周期到达时触发测量报告上报， 在本实施 例中， 当上报周期到达时， 将上报周期时间到达之前测量的服务小区与待测 量邻 d、区标识对应的邻小区之间的定时时间差上报给基站；
可选的， 当采用周期上报方式进行上报时， 可以将此周期内测量的多个 定时时间差的平均值上报给基站， 或者也可以将此周期内测量的多个定时时 间差中的第一定时时间差上报给基站， 其中第一定时时间差为多个定时时间 差中最准确的一个。 比如， 可以根据经验设定一个较准确的定时时间差门限， 确定多个定时时间差中与定时时间差门限最接近的一个定时时间差为第一定 时时间差。
事件上报用于当触发事件发生时触发测量报告上报， 在本实施例中， 作 为一个例子， 当终端测量的服务小区与待测量邻小区标识对应的邻小区之间 的定时时间差中的参考信号时间差大于时间差门限时， 将测量的定时时间差 上报给基站。
本发明实施例提供一种小区之间定时同步的方法， 通过终端接收基站发 送的定时测量控制消息， 启动定时测量后， 测量的服务小区与待测量邻小区 标识对应的邻小区之间的定时时间差， 然后将定时时间差上报给所述基站， 使得基站可以根据定时时间差调整服务小区的定时时间， 达到与邻小区定时 同步， 从而可以实现小区间的定时同步， 并且降低设备成本、 安装成本。 本发明实施例提供一种小区之间定时同步的方法， 如图 2 所示， 该方法 包括以下步骤：
步骤 201 ,基站向终端发送定时测量控制消息， 定时测量控制消息中包括 待测量邻小区标识， 以便终端测量其所在的服务小区与待测量邻小区标识对 应的邻小区之间的定时时间差；
在本实施例中， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻 小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间差。 例 如， 终端上线后， 向基站上报自己的***版本， 基站获得各个终端上报的系 统版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间 差） 的功能， 然后基站向具备完成定时测量的功能的终端发送定时测量控制 消息， 接收到此消息的终端启动定时测量， 并进行进一步的操作。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
本实施例中， 基站可以为终端所在的服务小区提供服务的小基站， 小基 站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pi co Cel l 的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等。 另外， 为待测量 邻小区提供服务的可以为宏基站，宏基站可以为服务 Macro Cel l的宏基站。
步骤 202 , 基站接收终端发送的定时时间差；
其中， 定时时间差可以为无线帧级的定时时间差。 可选的， 无线帧级的 定时时间差可以包括参考信号时间差、 子帧号差和***帧号差。
进一步可选的， 在本步骤之后还包括： 基站以第一预设功率为步长逐步 降低功率， 直到基站下没有连接态的终端后基站关闭， 其中基站关闭指的是 基站中提供功率发射功能的设备或者模块关闭， 使得在基站调整服务小区的 定时时间时， 可以避免服务小区中的终端掉话。 步骤 203 ,基站根据接收到的定时时间差调整服务小区的定时时间， 以达 到与待测量邻 d、区标识对应的邻小区定时同步。
进一步可选的， 基站根据接收到的定时时间差调整服务小区的定时时间， 即基站根据接收到的参考信号时间差、 子帧号差和***帧号差调整服务小区 的定时时间， 具体包括： 根据 Tl = TO + RSTD调整子帧起始时刻； 其中， T1 表示调整后的子帧起始时刻， TO表示调整前子帧起始时刻， RSTD表示参考信 号时间差；
以及根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， SBFN1 表示调整后的子帧号， SBFN0表示调整前的子帧号， SBFND表示子帧号差； 以及根据 SFN1 = (SFN0 + SFND) mode 1 024调整***帧号； 其中， SFN1 表示调整后的***帧号， SFN0表示调整前的***帧号， SFND表示***帧号差。
进一步可选的， 在本步骤之后还包括： 基站以第二预设功率开启， 并以 第二预设功率为步长逐步提升功率， 直到基站的功率达到最大设定功率时停 止提升功率。 将基站的功率提升至最大设定功率时停止， 可以使得基站以此 最大设定功率发射信号以及处理基站的其他事务。
本发明实施例提供一种小区之间定时同步的方法， 通过基站接收终端发 送的定时时间差， 再根据定时时间差调整服务小区的定时， 使得可以达到与 邻小区定时同步， 并且可以降低基站的设备成本、 安装成本。 本发明实施例提供一种小区之间定时同步的装置， 如图 3 所示， 该装置 包括： 接收单元 301 , 测量单元 302 , 发送单元 303 ; 该装置可以为终端， 终 端可以为位于其所在的服务小区边缘、 靠近待测量邻小区的终端， 并且具备 定时测量的功能， 此定时测量为测量定时时间差。 比如， 终端上线后， 向基 站上报自己的***版本， 基站获得各个终端上报的***版本之后， 即可以获 知哪些终端具备完成定时测量（即可以测量定时时间差） 的功能， 然后基站 向具备完成定时测量的功能的终端发送定时测量控制消息， 接收到此消息的 终端启动定时测量， 并进行进一步的操作。 接收单元 301 , 用于接收基站发送的定时测量控制消息， 启动定时测量， 定时测量控制消息中包括待测量邻小区标识；
进一步可选的， 定时测量控制消息中还可以包括上报方式， 该上报方式 包括周期上报或者事件上报；
当上报方式为周期上报时， 定时测量控制消息中还包括上报周期； 当上 报方式为事件上报时， 定时测量控制消息中还包括时间差门限。
接收单元 301 进行定时测量时采用的定时机制可以理解为： 终端中的接 收单元 301 根据接收到的基站发送的信号， 可以获知此基站定时发送信号的 时间， 因此接收单元 301 可以在此基站发送信号的时间到来时， 进行定时测 量。
接收单元 301启动定时测量之后， 测量单元 302 , 用于测量服务小区与待 测量邻 d、区标识对应的邻小区之间的定时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。 可选的， 无线帧级的 定时时间差可以包括参考信号时间差， 子帧号差和***帧号差；
进一步可选的， 测量单元 302 中包括： 测量模块， 第一确定模块， 第二 确定模块， 第三确定模块；
其中， 测量单元 302 中的测量模块， 用于测量邻小区的第一子帧的起始 时刻， 以及测量服务小区的第二子帧的起始时刻， 其中， 第二子帧为从测量 所述服务小区获得的至少两个子帧中确定的起始时刻与第一子帧的起始时刻 最近的子帧；
测量单元 302 中的第一确定模块， 用于根据第一子帧的起始时刻与第二 子帧的起始时刻确定参考信号时间差；
测量单元 302 中的第二确定模块， 用于根据第一子帧确定第一子帧号， 以及根据第二子帧确定第二子帧号， 并根据第一子帧号和第二子帧号确定子 帧号差；
测量单元 302 中的第三确定模块， 用于根据第一子帧确定包含第一子帧 的无线帧对应的第一***帧号， 以及根据第二子帧确定包含第二子帧的无线 帧对应的第二***帧号， 并根据第一***帧号和第二***帧号确定***帧号 差。
发送单元 303 , 用于将定时时间差上报给基站， 以便基站根据定时时间差 调整所述 Λ良务小区的定时时间， 达到与邻小区定时同步。
进一步可选的， 发送单元 303将定时时间差上^艮给基站时， 可以根据定 时测量控制消息中包括的上报方式上报定时时间差， 其中， 上报方式包括周 期上报或者事件上报。
具体的， 周期上报用于当上报周期到达时触发测量报告上报， 在本实施 例中， 当上报周期到达时， 发送单元 303将上报周期时间到达之前测量单元 302 测量的服务小区与待测量邻小区标识对应的邻小区之间的定时时间差上 报给基站；
可选的， 当采用周期上报方式进行上报时， 可以将此周期内测量的多个 定时时间差的平均值上报给基站， 或者也可以将此周期内测量的多个定时时 间差中的第一定时时间差上报给基站， 其中第一定时时间差为多个定时时间 差中最准确的一个。 比如， 可以根据经验设定一个较准确的定时时间差门限， 确定多个定时时间差中与定时时间差门限最接近的一个定时时间差为第一定 时时间差。
事件上报用于当触发事件发生时触发测量报告上报， 在本实施例中， 举 例而言， 当终端测量的服务小区与待测量邻小区标识对应的邻小区之间的定 时时间差中的参考信号时间差大于时间差门限时， 发送单元 303将测量单元 302测量的定时时间差上报给基站。
本发明实施例提供一种小区之间定时同步的装置， 通过测量单元测量的 服务小区与待测量邻小区标识对应的邻小区之间的定时时间差， 然后发送单 元将将定时时间差上报给基站， 使得基站可以根据定时时间差进行定时时间 调整， 达到与邻小区定时同步， 并且可以降低设备成本、 安装成本。 本发明实施例提供另一种小区之间定时同步的装置， 该装置可以为基站， 此基站可以为服务小区提供服务的小基站， 小基站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pico Cel l的小基站， 还可以为服务家 庭小区 Femto Cel l的小基站等。 如图 4所示， 该装置包括： 发送单元 401 , 接收单元 402 , 调整单元 403;
发送单元 401 , 用于向终端发送定时测量控制消息， 定时测量控制消息中 包括待测量邻小区标识， 以便终端测量终端所在的服务器小区与待测量邻小 区标识对应的邻小区之间的定时时间差；
在本实施例中， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻 小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间差。 例 如， 终端上线后， 向基站上报自己的***版本， 基站获得各个终端上报的系 统版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间 差） 的功能， 然后基站向具备完成定时测量的功能的终端发送定时测量控制 消息， 接收到此消息的终端启动定时测量， 并进行进一步的操作。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
接收单元 402 , 用于接收终端发送的定时时间差；
其中， 定时时间差可以为无线帧级的定时时间差。 可选的， 无线帧级的 定时时间差可以包括参考信号时间差， 子帧号差和***帧号差。
进一步可选的， 该装置还包括第一处理单元； 在接收单元 402接收到终 端发送的定时时间差之后， 第一处理单元用于以第一预设功率为步长逐步降 低功率， 直到该装置下没有连接态的终端后基站关闭， 其中基站关闭指的是 基站中提供功率发射功能的设备或者模块关闭， 使得在基站调整服务小区的 定时时间时， 可以避免服务小区中的终端掉话。
调整单元 403 , 用于根据定时时间差调整服务小区的定时时间， 以达到与 待测量邻小区标识对应的邻小区定时同步。
进一步可选的， 调整单元 403根据接收到的参考信号时间差、 子帧号差 和***帧号差调整服务小区的定时时间， 具体用于：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， T1表示调整后的子帧起 始时刻， TO表示调整前子帧起始时刻， RSTD表示参考信号时间差；
以及根据 SBFN1 = (SBFN0 + SBFND) mode 10调整子帧号； 其中， SBFN1 表示调整后的子帧号， SBFN0表示调整前的子帧号， SBFND表示子帧号差； 以及根据 SFN1 = (SFN0 + SFND) mode 1024调整***帧号； 其中， SFN1 表示调整后的***帧号， SFN0表示调整前的***帧号， SFND表示***帧号差。
进一步可选的， 该装置还包括第二处理单元； 在调整单元 403根据定时 时间差调整服务小区的定时时间之后， 第二处理单元以第二预设功率开启， 并以第二预设功率为步长逐步提升功率， 直到该装置的功率达到最大设定功 率时停止提升功率。 将基站的功率提升至最大设定功率时停止， 可以使得基 站以此最大设定功率发射信号以及处理基站的其他事务。
本发明实施例提供一种小区之间定时同步的装置， 通过接收单元接收终 端发送的定时时间差， 调整单元再根据定时时间差调整服务小区的定时， 使 得可以达到与邻小区定时同步， 并且可以降低基站的设备成本、 安装成本。
实施例 2
本发明实施例提供一种小区之间定时同步的方法， 其中， 本实施例的应 用场景为： 如图 5 所示， 终端位于小基站所对应的服务小区覆盖范围内， 每 个小基站服务一个小区， 其中， 小基站可以为服务微小区 Micro Ce l l的小基 站， 也可以为服务皮小区 Pi co Cel l的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等；
为待测量邻小区提供服务的可以为宏基站，宏基站可以为服务 Macro Cel l 的宏基站；
终端可以为位于其所在的服务小区边缘、 靠近待测量邻小区的终端， 并 且具备定时测量的功能， 此定时测量为测量定时时间差。 举例而言， 终端上 线后， 向基站上报自己的***版本， 基站获得各个终端上报的***版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间差） 的功能， 然后基站向具备完成定时测量的功能的终端发送定时测量控制消息， 接收到 此消息的终端启动定时测量， 并进行进一步的操作。
如图 6所示， 该方法包括以下步骤：
步骤 601， 小基站向终端发送定时测量控制消息， 定时测量控制消息中包 括待测量邻小区标识， 以便终端测量其所在的服务器小区与待测量邻小区标 识对应的邻小区之间的定时时间差；
定时测量控制消息中包括待测量邻小区标识， 使得终端可以测量待测量 邻小区和服务小区的定时时间差。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
进一步可选的， 定时测量控制消息中还可以包括上报方式， 该上报方式 包括周期上报或者事件上报；
当上报方式为周期上报， 定时测量控制消息中还包括上报周期； 当上报 方式为事件上 ^艮时， 定时测量控制消息中还包括时间差门限。
步骤 602 , 终端接收小基站发送的定时测量控制消息， 启动定时测量， 并 向小基站发送定时测量控制完成消息；
其中， 定时测量控制完成消息中携带终端启动定时测量成功或者失败的 信息， 当终端启动定时测量成功时， 则继续执行后续的操作， 当终端启动定 时测量失败时， 则需要终端重新启动。
在本实施例中， 终端进行定时测量时采用的定时机制可以理解为： 终端 根据接收到的基站发送的信号， 可以获知此基站定时发送信号的时间， 因此 终端可以在此基站发送信号的时间到来时， 进行定时测量。
步骤 603 ,终端测量其所在的服务小区与待测量邻小区标识对应的邻小区 之间的定时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。 可选的无线帧级的定 时时间差可以包括参考信号时间差、 子帧号差和***帧号差。 具体终端根据以下方式分别确定参考信号时间差、 子帧号差和***帧号 差。
1 )终端测量服务小区与待测量邻小区标识对应的邻小区之间的参考信号 时间差时， 可以为： 终端测量邻小区的第一子帧的起始时刻， 以及测量终端 所在的服务小区的第二子帧的起始时刻， 其中， 第二子帧为从测量所述服务 小区获得的至少两个子帧中确定的起始时刻与第一子帧的起始时刻最近的子 帧； 然后终端根据第一子帧的起始时刻与第二子帧的起始时刻确定参考信号 时间差；
这里， 第一子帧可以为邻小区的多个子帧中的任一个子帧， 服务小区中 有多个子帧， 每个子帧都有起始时刻， 其中， 服务小区中的多个子帧中的起 始时刻与第一子帧的起始时刻最近的子帧即为第二子帧。 可选的， 作为一个 例子， 由于按照时间顺序， 每一秒可以测量一个子帧， 以第一子帧的起始时 刻为标准， 获得第一子帧起始时刻之前和之后， 服务小区中的两个子帧， 并 分别计算这两个子帧的起始时刻与第一子帧的起始时刻的差的绝对值， 将其 中最小的差的绝对值对应的子帧确定为第二子帧。
进一步可选的， 根据 RSTD=Tsubf rameRxL - Tsubf rameRxF确定参考信 号时间差； 其中， RSTD表示参考信号时间差， Tsubf rameRxL表示邻小区的第 一子帧的起始时刻， Tsubf rameRxF表示服务小区的第二子帧的起始时刻。
2 )终端测量服务小区与待测量邻小区标识对应的邻小区之间的子帧号差 时， 可以为： 终端根据第一子帧确定第一子帧号， 以及根据第二子帧确定第 二子帧号， 并根据第一子帧号和第二子帧号确定子帧号差；
例如， 在长期演进（Long Term Evo lut ion , LTE ) ***中， 一个无线帧 的周期为 10ms , 包括 10个子帧， 子帧号分别为 0、 1、 2、 3、 4、 5、 6、 7、 8、 9 , 每个子帧包括两个时隙。 对无线帧进行编号， 称为***帧号 SFN, 其中系 统帧号用 1 0比特表示， 周期为 1024。在一个无线帧中第 0号子帧和第 5号子 帧中包含同步信号， 从而可以确定无线帧的起始位置， 进一步可以确定子帧 号。 进一步可选的， 根据 SBFND= (Nsubf rame_L+ 10 - Nsubf rame.F) mode 1 0 确定子帧号差； 其中， SBFND表示子帧号差， Nsubf rame_L表示邻小区的第一 子帧号， 1> 1^1116 _ ?表示服务小区的第二子帧号。
3 )终端测量服务小区与待测量邻小区标识对应的邻小区之间的***帧号 差时， 可以为： 终端根据第一子帧确定包含第一子帧的无线帧对应的第一系 统帧号， 以及根据第二子帧确定包含第二子帧的无线帧对应的第二***帧号， 并根据第一***帧号和第二***帧号确定***帧号差。
可选的， 由终端读取物理广播信道（Phys i ca l Broadca s t Channe l , PBCH) 获取小区的***帧号，其中***帧号由 10比特表示，高 8比特直接包含在 PBCH 承载的信息中， 低 2比特包含在 PBCH的加扰信息中。
进一步可选的， 根据 SFND= (Nsfn_L + 1024 - Ns fn_F) mode 1024确定 ***帧号差； 其中， SFND表示***帧号差， Nsfn_L表示邻小区的第一***帧 号， Nsfn_F表示服务小区的第二***帧号。
需要说明的是， 确定子帧号与***帧号的方式还可以采用其他的方式， 本发明实施例并不限定上述方式。
步骤 604 , 终端将定时时间差上报给小基站， 以便小基站根据定时时间差 调整 Λ良务小区的定时时间， 达到与邻小区定时同步；
其中， 终端根据接收到的小基站发送的定时测量控制消息中的上报方式 进行上报， 其中， 上报方式包括周期上报或者事件上报。
具体的， 周期上报用于当上报周期到达时触发测量报告上报， 在本实施 例中， 当上报周期到达时， 将上报周期时间到达之前测量的服务小区与待测 量邻小区标识对应的邻小区之间的定时时间差上报给小基站；
可选的， 当采用周期上报方式进行上报时， 可以将此周期内测量的多个 定时时间差的平均值上报给基站， 或者也可以将此周期内测量的多个定时时 间差中的第一定时时间差上报给基站， 其中第一定时时间差为多个定时时间 差中最准确的一个。 例如， 可以根据经验设定一个较准确的定时时间差门限， 确定多个定时时间差中与定时时间差门限最接近的一个定时时间差为第一定 时时间差。
事件上报用于当触发事件发生时触发测量报告上报， 在本实施例中， 作 为一个例子， 当终端测量的服务小区与待测量邻小区标识对应的邻小区之间 的定时时间差中的参考信号时间差大于时间差门限时， 将测量的定时时间差 上报给小基站。
步骤 605 , 小基站接收终端发送的定时时间差；
不论终端采用何种上报方式进行上报， 小基站都可以获取其中包含的定 时时间差， 其中， 定时时间差包括参考信号时间差、 子帧号差和***帧号差。 当接收到终端上报的定时时间差后， 可以将定时时间差保存。
步骤 606 , 小基站以第一预设功率为步长逐步降低功率， 直到小基站下没 有连接态的终端后小基站关闭， 其中小基站关闭可以是小基站中提供功率发 射功能的设备或者模块关闭；
需要说明的是， 小基站开启后， 启动初始定时调整， 一般初始定时调整 的时间调整幅度比较大。 初始定时调整完成后， 开始后续定时调整流程， 后 续定时调整是在小基站工作阶段持续进行的一项工作。
小基站进行初始定时调整时， 时间调整的幅度比较大， 可能会影响服务 小区中正在被服务的终端， 因此本实施例中进行初始定时调整之前， 将小基 站平滑关闭， 完成初始定时调整之后， 再将基站平滑开启。
这里基站采用平滑关闭与平滑开启， 而不是直接关闭与直接开启的原因 在于：
小基站部署并投入服务时， 宏网络已经比较成熟并且可以持续提供服务， 宏基站在整个服务区域有良好的覆盖。 当小基站与宏基站同频部署时， 在小 基站覆盖区域， 宏基站和小基站有较强的相互干扰， 小基站的信号较强， 该 区域的终端被 'J、基站服务。
当小基站关闭时， 小基站覆盖区域内的终端被宏基站服务， 当小基站直 接开启时， 这些终端触发宏基站到小基站的切换， 距离小基站太近的终端， 由于受到小基站干扰太强， 在宏基站下行质量太差， 无法成功接收到宏基站 下发的切换命令， 导致一些终端掉话。
当宏基站与小基站同时开启时， 小基站覆盖范围的终端被小基站服务。 当小基站关闭之前， 可以提前将这些终端切换到宏基站中， 由宏基站提供服 务， 然而距离小基站太近的终端， 由于受到小基站干扰太强， 在宏基站下行 质量太差， 切换到宏基站后无法正常工作， 只能被小基站服务。 当关闭小基 站之后， 这部分终端由于没有小基站信号而掉话。
因此在小基站开启时， 并在定时调整之前， 可以采用平滑关闭的方式关 闭小基站， 避免小基站覆盖范围内的终端掉话。 具体的， 以平滑关闭的方式 关闭小基站的方法， 可以具体参看附图 7所示的示意图。
在小基站以第一预设功率为步长逐步降低功率， 直到小基站下没有连接 态的终端后关闭之后， 继续执行步骤 607 , 调整服务小区的定时时间。
步骤 607 , 小基站根据定时时间差调整服务小区的定时时间， 以达到与待 测量邻小区标识对应的邻小区定时同步。
在小基站关闭后， 执行初始定时调整， 此时小基站仅是不向外发送消息， 即仅小基站中提供功率发射功能的设备或者模块关闭， 此时可以由小基站内 的处理器等设备执行初始定时调整。
小基站根据接收到的定时时间差， 来具体调整自身的定时时间， 即调整 子帧起始时刻、 子帧号和***帧号。 需要说明的是， 小基站可以调整服务小 区中任一子帧的定时信息， 以达到与待测量邻 d、区标识对应的邻小区定时同 步。
小基站可以根据定时时间差中参考信号时间差调整服务小区的子帧起始 时刻， 具体的可以采用以下方式：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， T1表示调整后的子帧起 始时刻， TO表示调整前子帧起始时刻， RSTD表示参考信号时间差；
小基站可以根据定时时间差中子帧号差调整服务小区的子帧号， 具体的 可以采用以下方式：
根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， SBFN1表示 调整后的子帧号， SBFN0表示调整前的子帧号， SBFND表示子帧号差； 小基站可以根据定时时间差中***帧号差调整服务小区的***帧号， 具 体的可以采用以下方式：
根据 SFN1 = (SFN0 + SFND) mode 1 024调整***帧号； 其中， SFN1表示 调整后的***帧号， SFN0表示调整前的***帧号， SFND表示***帧号差。
步骤 608 , 小基站以第二预设功率开启， 并以第二预设功率为步长逐步提 升功率， 直到小基站的功率达到最大设定功率时停止提升功率。
在初始定时调整完成后， 可以采用平滑开启的方式开启小基站， 以可以 为小基站覆盖范围内的终端继续提供服务。 具体的， 以平滑开启的方式开启 小基站的方法， 可以具体参照图 8所示的示意图。
在小基站以第二预设功率开启， 并以第二预设功率为步长逐步提升功率， 直到小基站的功率达到最大设定功率时停止提升功率之后， 继续执行步骤 609。
步骤 609 , 在小基站正常工作过程中， 进行后续定时调整。
后续定时调整的流程即为终端测量服务小区与邻小区的定时时间差， 并 上报给基站， 基站根据定时时间差进行定时调整的流程。
本发明实施例提供一种小区之间定时同步的方法， 通过测量服务小区与 邻小区之间的定时时间差， 小基站再根据定时时间差进行调整定时， 可以降 氐设备成本、 安装成本， 实现小区间的定时同步。 进一步可选的， 具体的， 本实施例中， 以平滑关闭的方式关闭小基站的 方法， 如图 7所示， 该方法包括以下步骤：
步骤 701 , 小基站在当前采用的功率下降低第一预设功率，使小基站覆盖 范围内的终端可以触发切换；
其中， 第一预设功率的设置需要满足以下条件： 第一， 使小基站降低功 率时不会使小基站边缘的终端受到较大的宏基站干扰； 第二， 在满足第一条 件时， 使第一预设功率尽量大， 以便小基站关闭的过程尽量短， 提高工作效 率。
步骤 702 , 启动定时器进行计时；
定时器的时长设置需要满足以下条件： 第一， 使宏基站有足够的时间触 发到基站的切换； 第二， 在满足第一条件时， 使定时器的时长尽量短， 以便 小基站关闭过程尽量短。
步骤 703 , 判断是否触发小基站覆盖范围内的终端的切换；
步骤 704 , 当触发小基站覆盖范围内的任一终端的切换时， 则执行切换， 使此终端由宏基站提供服务， 并再次重新启动定时器；
由于小基站覆盖范围内的终端有许多， 因此需要逐一启动定时器执行切 换。
步骤 705 , 当没有触发小基站覆盖范围内的终端的切换时， 则进一步判断 定时器是否超时；
当定时器没有超时时， 则继续执行步骤 703;
步骤 706 , 当定时器超时时， 则进一步判断小基站覆盖范围内是否还有连 接状态的终端；
当小基站覆盖范围内还有连接状态的终端时， 则执行步骤 701 , 在当前功 率下再一次降低第一预设功率；
步骤 707 , 当小基站覆盖范围内没有连接状态的终端时， 则直接关闭小基 站， 结束操作流程。
采用平滑关闭小基站的方式， 可以使得 'J、基站覆盖范围内的终端避免掉 话。 进一步可选的， 以平滑开启的方式开启小基站的方法， 如图 8 所示该方 法包括以下步骤：
步骤 801 , 小基站以第二预设功率开启， 以使小基站可以为其覆盖范围内 的终端继续提供服务；
其中， 第二预设功率的设置需要满足以下条件： 使基站开启时几乎不对 距离基站最近的终端造成较大干扰， 此时终端由宏基站提供服务。 步骤 802 , 启动定时器进行计时；
定时器的时长的设置需要满足以下条件： 第一， 使被宏基站服务的终端 有足够的时间触发到小基站的切换； 第二， 在满足第一条件时， 使定时器的 时长尽量短， 以使小基站开启过程尽量短。
步骤 803 , 判断是否触发宏基站覆盖范围内的终端的切换；
由于当小基站与宏基站同频部署时， 在小基站覆盖区域， 宏基站和小基 站有较强的相互干扰， 小基站的信号较强， 小基站覆盖区域的终端被小基站 服务。 此时， 当小基站开启后， 可以触发宏基站中在宏基站边缘的终端切换 到小基站中。
步骤 804 , 当触发宏基站覆盖范围内的终端的切换时， 小基站执行切换， 使此终端由小基站服务， 并再次重新启动定时器；
由于小基站覆盖范围内的终端有许多， 因此需要逐一启动定时器执行切 换。
步骤 805 , 当没有触发宏基站覆盖范围内的终端的切换时， 则进一步判断 定时器是否超时；
当定时器没有超时时， 则继续执行步骤 803;
步骤 806 , 当定时器超时时， 则在当前功率下提升第二预设功率； 本实施例以第二预设功率为步长逐次提升 d、基站的功率。
步骤 807 , 判断当前功率是否到达最大设定功率；
当当前功率没有到达最大设定功率时， 则继续执行步骤 702 , 进一步执行 终端切换；
步骤 808 , 当当前功率到达最大设定功率时， 则成功开启小基站， 可以由 小基站提供服务， 关闭当前流程。 将小基站的功率提升至最大设定功率时停 止， 可以使得小基站以此最大设定功率发射信号以及处理基站的其他事务。
采用平滑开启小基站的方式开启基站的过程中， 可以避免基站覆盖范围 内的终端掉话。 本发明实施例提供一种小区之间定时同步的装置， 如图 9 所示， 该装置 包括： 接收单元 901 , 测量单元 902 , 测量模块 9021 , 第一确定模块 9022 , 第二确定模块 9023 , 第三确定模块 9024 , 发送单元 903; 该装置可以为终端， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻小区的终端， 并且具 备定时测量的功能， 此定时测量为测量定时时间差。
接收单元 901 , 用于接收基站发送的定时测量控制消息， 启动定时测量， 定时测量控制消息中包括待测量邻小区标识；
其中， 定时测量控制消息中还可以包括上报方式， 该上报方式包括周期 上报或者事件上报； 当上报方式为周期上报时， 定时测量控制消息中还包括 上报周期， 当上报方式为事件上报时， 定时测量控制消息中还包括时间差门 限。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
本实施例中， 基站可以为终端所在的服务小区提供服务的小基站， 小基 站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pi co Cel l 的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等。 另外， 为待测量 邻小区提供服务的为宏基站， 宏基站可以为服务 Macro Cel l的宏基站。
在本实施例中， 接收单元 901 启动定时测量时采用的定时机制可以理解 为： 接收单元 901 根据接收到的基站发送的信号， 可以获知此基站定时发送 信号的时间， 因此终端可以在此基站发送信号的时间到来时， 进行定时测量。
测量单元 902 ,用于测量服务小区与待测量邻小区标识对应的邻小区之间 的定时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。 可选的， 所述无线帧 级的定时时间差可以包括参考信号时间差、 子帧号差和***帧号差；
进一步可选的， 在确定参考信号时间差时， 测量单元 902 中的测量模块 9021 , 用于测量邻小区的第一子帧的起始时刻， 以及测量服务小区的第二子 帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区获得的至少两个 子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子帧；
这里， 第一子帧可以为邻小区的多个子帧中的任一个子帧， 服务小区中 有多个子帧， 每个子帧都有起始时刻， 其中， 服务小区中的多个子帧中的起 始时刻与第一子帧的起始时刻最近的子帧即为第二子帧。 可选的， 由于按照 时间顺序， 每一秒可以测量一个子帧， 以第一子帧的起始时刻为标准， 获得 服务小区中第一子帧起始时刻之前和之后的两个子帧， 并分别计算这两个子 帧的起始时刻与第一子帧的起始时刻的差的绝对值， 将其中最小的差的绝对 值对应的子帧确定为第二子帧。
测量模块 9021测量邻小区的第一子帧的起始时刻， 以及测量服务小区的 第二子帧的起始时刻之后， 测量单元 902中的第一确定模块 9022 , 用于根据 第一子帧的起始时刻与第二子帧的起始时刻确定参考信号时间差； 进一步可 选的， 第一确定模块 9022用于： 根据 RSTD=Tsubf rameRxL - Tsubf rameRxF 确定参考信号时间差； 其中， RSTD表示参考信号时间差， Tsubf rameRxL表示 邻小区的第一子帧的起始时刻， Tsubf rameRxF表示服务小区的第二子帧的起 始时刻；
进一步可选的 ,在确定子帧号差时，测量单元 902中的第二确定模块 9023 , 用于根据第一子帧确定第一子帧号， 以及根据第二子帧确定第二子帧号， 并 根据第一子帧号和第二子帧号确定子帧号差；
第二确定模块 9023用于： 根据 SBFND= (Nsubf rame_L+ 10 - Nsubf rame.F) mode 10确定子帧号差； 其中， SBFND表示子帧号差， Nsubf rame_L表示邻小 区的第一子帧号， Nsubf 1^1^ _ ?表示服务小区的第二子帧号；
进一步可选的， 在确定***帧号差时， 测量单元 902 中的第三确定模块 9024 , 用于根据第一子帧确定包含第一子帧的无线帧对应的第一***帧号， 以及根据第二子帧确定包含第二子帧的无线帧对应的第二***帧号， 并根据 第一***帧号和第二***帧号确定***帧号差； 第三确定模块 9024用于：根据 SFND= (Ns fn_L + 1024 - Nsfn_F) mode 1024 确定***帧号差； 其中， SFND表示***帧号差， Nsfn_L表示邻小区的第一系 统帧号， Nsfn_F表示服务小区的第二***帧号。
在测量单元 902测量获得定时时间差后， 发送单元 903 , 用于将定时时间 差上报给基站， 以便基站根据定时时间差调整服务小区的定时时间， 达到与 邻小区定时同步。
进一步可选的， 发送单元 903将定时时间差上^艮给基站时， 可以根据定 时测量控制消息中包括的上报方式上报定时时间差， 其中， 上报方式包括周 期上报或者事件上报。
当上报方式为周期上报时， 发送单元 903 用于： 当上报周期到达时触发 测量报告上报， 将定时时间差上报给基站， 即发送单元 903将在上报周期到 达之前测量单元 902测量的定时时间差上报给基站；
可选的， 当采用周期上报方式进行上报时， 可以将此周期内测量的多个 定时时间差的平均值上报给基站， 或者也可以将此周期内测量的多个定时时 间差中的第一定时时间差上报给基站， 其中第一定时时间差为多个定时时间 差中最准确的一个。 例如， 可以根据经验设定一个较准确的定时时间差门限， 确定多个定时时间差中与定时时间差门限最接近的一个定时时间差为第一定 时时间差。
当上报方式为事件上报时， 发送单元 903 用于： 当定时时间差中的参考 信号时间差大于时间差门限时触发测量报告上报， 即发送单元 903将测量单 元 902测量的定时时间差上报给基站。
本发明实施例提供一种小区之间定时同步的装置， 通过测量单元测量服 务小区与邻小区之间的定时时间差， 并由发送单元将定时时间差发送给基站， 以便基站根据定时时间差进行定时时间调整， 达到与邻小区定时同步， 并且 可以降低安装的设备的成本、 安装成本。 本发明实施例提供一种小区之间定时同步的装置， 该装置可以为基站， 此基站可以是为服务小区提供服务的小基站，小基站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pico Cel l的小基站， 还可以为服务家 庭小区 Femto Cel l的小基站等。 如图 10所示， 该装置包括： 发送单元 1001 , 接收单元 1002 , 调整单元 1003 , 第一处理单元 1004 , 第二处理单元 1005; 发送单元 1001 , 用于向终端发送定时测量控制消息， 定时测量控制消息 中包括待测量邻小区标识， 以便终端测量终端所在的服务器小区与待测量邻 'J、区标识对应的邻小区之间的定时时间差；
在本实施例中， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻 小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间差。 例 如， 终端上线后， 向基站上报自己的***版本， 基站获得各个终端上报的系 统版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间 差）的功能， 然后基站中的发送单元 1001向具备完成定时测量的功能的终端 发送定时测量控制消息， 接收到此消息的终端启动定时测量， 并进行进一步 的操作。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。 本实施例中， 为待测量邻小区提供服务的为宏基站，宏基站可以 为服务 Macro Cel l的宏基站。
接收单元 1002 , 用于接收终端发送的定时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。 可选的， 无线帧级的 定时时间差可以包括参考信号时间差、 子帧号差和***帧号差；
进一步可选的， 该装置可以将接收到的定时时间差进行保存。
进一步可选的， 在基站进行初始定时调整时， 由于时间调整的幅度较大， 因此需要将基站关闭后再进行时间调整， 该装置还包括第一处理单元 1004 , 用于以第一预设功率为步长逐步降低功率， 直到该装置下没有连接态的终端 后基站关闭， 其中基站关闭指的是基站中提供功率发射功能的设备或者模块 关闭； 采用平滑关闭的方式关闭基站可以使得基站覆盖范围内的终端避免掉 话。
调整单元 1003, 用于根据定时时间差调整服务小区的定时时间， 以达到 与待测量邻小区标识对应的邻小区定时同步。
进一步可选的， 调整单元 1003根据接收到的参考信号时间差、 子帧号差 和***帧号差调整 Λ良务小区的定时时间。
调整单元 1003根据接收到的参考信号时间差调整子帧起始时刻时， 根据 Tl= TO + RSTD调整子帧起始时刻； 其中， T1 表示调整后的子帧起始时刻， TO表示调整前子帧起始时刻， RSTD表示参考信号时间差；
调整单元 1003根据接收到的子帧号差调整子帧号时，根据 SBFN1 = (SBFN0 + SBFND) mode 10调整子帧号； 其中， SBFN1表示调整后的子帧号， SBFN0表 示调整前的子帧号， SBFND表示子帧号差；
调整单元 1003根据接收到的***帧号差调整***帧号时， 根据 SFN1 = (SFN0 + SFND) mode 1024调整***帧号； 其中， SFN1 表示调整后的***帧 号， SFN0表示调整前的***帧号， SFND表示***帧号差。
在调整完毕后， 需要将基站开启， 以使基站正常工作， 则该装置还包括： 第二处理单元 1005, 用于以第二预设功率开启， 并以第二预设功率为步长逐 步提升功率， 直到该装置的功率达到最大设定功率时停止提升功率。
在基站正常工作过程中， 需进行后续定时调整， 后续定时调整的幅度较 小， 因此不用将基站关闭后再进行调整， 后续定时调整需要由接收单元 1002 与调整单元 1003配合完成时间调整。
本发明实施例提供一种小区之间定时同步的装置， 通过调整单元将接收 单元接收到的定时时间差调整服务小区的定时， 以达到与待测量邻小区标识 对应的邻小区定时同步， 并且不需要在基站上安装 GPS 等设备， 可以减少降 低设备成本、 安装成本。
实施例三
本发明实施例提供一种终端， 如图 11所示， 该终端包括： 接收器 1101, 处理器 1102, 发送器 1103; 终端可以为位于其所在的服务小区边缘、 靠近待 测量邻小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间 差。
接收器 1101 , 用于接收基站发送的定时测量控制消息， 启动定时测量， 定时测量控制消息中包括待测量邻小区标识；
其中， 定时测量控制消息中还可以包括上报方式， 上报方式包括周期上 报或者事件上报；
当上报方式为周期上报时， 定时测量控制消息中还包括上报周期； 当上 报方式为事件上报时， 定时测量控制消息中还包括时间差门限。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。
本实施例中， 基站可以为终端所在的服务小区提供服务的小基站， 小基 站可以为服务微小区 Micro Cel l的小基站， 也可以为服务皮小区 Pi co Cel l 的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等。 另外， 为待测量 邻小区提供服务的为宏基站， 宏基站可以为服务 Macro Cel l的宏基站。
处理器 1102 , 用于测量服务小区与待测量邻小区标识对应的邻小区之间 的定时时间差；
定时时间差可以为无线帧级的定时时间差。 可选的， 所述无线帧级的定 时时间差可以包括参考信号时间差， 子帧号差和***帧号差；
进一步可选的， 在确定参考信号时间差时， 处理器 1102用于， 测量邻小 区的第一子帧的起始时刻， 以及测量服务小区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区获得的至少两个子帧中确定的起始时刻 与所述第一子帧的起始时刻最近的子帧；
这里， 第一子帧可以为邻小区的多个子帧中的任一个子帧， 服务小区中 有多个子帧， 每个子帧都有起始时刻， 其中， 服务小区中的多个子帧中的起 始时刻与第一子帧的起始时刻最近的子帧即为第二子帧。 可选的， 由于按照 时间顺序， 每一秒可以测量一个子帧， 以第一子帧的起始时刻为标准， 获得 服务小区中第一子帧起始时刻之前和之后的两个子帧， 并分别计算这两个子 帧的起始时刻与第一子帧的起始时刻的差的绝对值， 将其中最小的差的绝对 值对应的子帧确定为第二子帧。
具体的， 处理器 1102才艮据 RSTD=Tsubf rameRxL - Tsubf rameRxF确定参 考信号时间差； 其中， RSTD表示参考信号时间差， Tsubf rameRxL表示邻小区 的第一子帧的起始时刻， Tsubf rameRxF表示服务小区的第二子帧的起始时刻； 进一步可选的， 在确定子帧号差时， 处理器 11 02用于， 根据第一子帧确 定第一子帧号， 以及根据第二子帧确定第二子帧号， 并根据第一子帧号和第 二子帧号确定子帧号差； 具体的， 处理器 1102才艮据 SBFND= (Nsubf rame_L+ 1 0 - Nsubf rame.F) mode 10 确定子帧号差； 其中， SBFND 表示子帧号差， Nsubf rame_L表示邻小区的第一子帧号， Nsubf rame_F表示服务小区的第二子 帧号；
进一步可选的， 在确定***帧号差时， 处理器 1 102用于， 根据第一子帧 确定包含第一子帧的无线帧对应的第一***帧号， 以及根据第二子帧确定包 含第二子帧的无线帧对应的第二***帧号， 并根据第一***帧号和第二*** 帧号确定***帧号差。 具体的， 根据 SFND= (Nsfn_L + 1 024 - Nsfn_F) mode 1024确定***帧号差； 其中， SFND表示***帧号差， 表示邻小区的第 一***帧号， Ns f n_F表示服务小区的第二***帧号。
发送器 1103 , 用于将定时时间差上报给基站， 以便基站根据定时时间差 调整 Λ良务小区的定时时间， 达到与邻小区定时同步。
进一步可选的， 发送器 11 03将定时时间差上>¾给基站时， 可以根据定时 测量控制消息中包括的上报方式上报定时时间差， 其中， 上报方式包括周期 上报或者事件上报。
当上报方式为周期上报时， 发送器 1103用于， 当上报周期到达时触发测 量报告上报， 将定时时间差上报给基站， 即发送器 1103将在上报周期到达之 前处理器 11 02测量的定时时间差上报给基站；
可选的， 当采用周期上报方式进行上报时， 可以将此周期内测量的多个 定时时间差的平均值上报给基站， 或者也可以将此周期内测量的多个定时时 间差中的第一定时时间差上报给基站， 其中第一定时时间差为多个定时时间 差中最准确的一个。 例如， 可以根据经验设定一个较准确的定时时间差门限， 确定多个定时时间差中与定时时间差门限最接近的一个定时时间差为第一定 时时间差。
当上报方式为事件上报时， 发送器 1103用于， 当定时时间差中的参考信 号时间差大于时间差门限时触发测量报告上报， 将定时时间差上报给基站。
本发明实施例提供一种终端， 通过处理器测量服务小区与邻小区之间的 定时时间差， 并由发射器将定时时间差发送给基站， 以便基站根据定时时间 差进行定时时间调整， 达到与邻小区定时同步， 并且可以降低安装的设备的 成本、 安装成本„
本发明实施例提供一种基站， 此基站可以是服务小区提供服务的小基站， 小基站可以为服务微小区 Micro Cel l 的小基站， 也可以为服务皮小区 Pico Cel l的小基站， 还可以为服务家庭小区 Femto Cel l的小基站等。 如图 12所 示， 该基站包括： 发送器 1201 , 接收器 1202 , 处理器 1203;
发送器 1201 , 用于向终端发送定时测量控制消息， 定时测量控制消息中 包括待测量邻小区标识， 以便终端测量终端所在的服务器小区与待测量邻小 区标识对应的邻小区之间的定时时间差；
在本实施例中， 终端可以为位于其所在的服务小区边缘、 靠近待测量邻 小区的终端， 并且具备定时测量的功能， 此定时测量为测量定时时间差。 例 如， 终端上线后， 向基站上报自己的***版本， 基站获得各个终端上报的系 统版本之后， 即可以获知哪些终端具备完成定时测量（即可以测量定时时间 差）的功能， 然后基站中的发送器 1201向具备完成定时测量的功能的终端发 送定时测量控制消息， 接收到此消息的终端启动定时测量， 并进行进一步的 操作。
需要说明的是， 待测量邻小区可以是宏基站服务的宏小区， 由于进行定 时测量时可以根据宏基站的信号进行测量， 因此可以理解为待测量邻小区的 数量为一个。 本实施例中， 为待测量邻小区提供服务的为宏基站，宏基站可以 为服务 Macro Ce l l的宏基站。
接收器 1202 , 用于接收终端发送的定时时间差；
其中， 定时时间差可以是无线帧级的定时时间差。 可选的， 无线帧级的 定时时间差可以包括参考信号时间差、 子帧号差和***帧号差；
进一步可选的， 该装置可以将接收到的定时时间差进行保存。
进一步可选的， 在基站进行初始定时调整时， 由于时间调整的幅度较大， 因此需要将基站关闭后再进行时间调整， 因此处理器 1203 , 用于以第一预设 功率为步长逐步降低功率， 直到该装置下没有连接态的终端后基站关闭， 其 中基站关闭指的是基站中提供功率发射功能的设备或者模块关闭； 采用平滑 关闭的方式关闭基站可以使得基站覆盖范围内的终端避免掉话。
处理器 1203还用于， 根据定时时间差调整服务小区的定时时间， 以到与 待测量邻小区标识对应的邻小区定时同步。
进一步可选的， 处理器 1203根据接收到的参考信号时间差、 子帧号差和 ***帧号差调整服务小区的定时时间。
处理器 1203根据接收到的参考信号时间差调整子帧起始时刻时，根据 Tl = TO + RSTD调整子帧起始时刻； 其中， T1表示调整后的子帧起始时刻， TO表 示调整前子帧起始时刻， RSTD表示参考信号时间差；
处理器 1203根据接收到的子帧号差调整子帧号时， 根据 SBFN1 = (SBFNO + SBFND) mode 10调整子帧号； 其中， SBFN1表示调整后的子帧号， SBFN0表 示调整前的子帧号， SBFND表示子帧号差；
处理器 1203根据接收到的***帧号差调整***帧号时，根据 SFN1 = (SFN0 + SFND) mode 1024调整***帧号； 其中， SFN1表示调整后的***帧号， SFN0 表示调整前的***帧号， SFND表示***帧号差。
在调整完毕后， 需要将基站开启， 以使基站正常工作， 则处理器 1203还 用于以第二预设功率开启， 并以第二预设功率为步长逐步提升功率， 直到装 置的功率达到最大设定功率时停止提升功率。 在基站正常工作过程中， 需进行后续定时调整， 后续定时调整的幅度较 小， 因此不用将基站关闭后再进行调整， 后续定时调整需要由处理器 1203测 量服务小区与邻小区的定时时间差， 并上报给基站， 以便基站根据定时时间 差进行完成时间调整。
本发明实施例提供一种基站， 通过处理器将接收到的定时时间差调整服 务小区的定时， 以达到与所述待测量邻小区标识对应的邻小区定时同步， 并 且不需要在基站上安装 GPS等设备， 可以减少降低设备成本、 安装成本。
需说明的是， 以上所描述的装置实施例仅仅是示意性的， 其中所述作为 分离部件说明的单元可以是或者也可以不是物理上分开的， 作为单元显示的 部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者也可以分 布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来 实现本实施例方案的目的。 本领域普通技术人员在不付出创造性劳动的情况 下， 即可以理解并实施。
通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过专用硬件 包括专用集成电路、 专用 CPU、 专用存储器、 专用元器件等来实现， 但 4艮多情 况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方案本质上或 者说对现有技术做出贡献的部分可以以软件产品的形式体现出来， 该计算机 软件产品存储在可读取的存储介质中， 如计算机的软盘， U盘、 移动硬盘、 只 读存储器（ROM, Read-Only Memory ), 随机存取存储器（RAM, Random Acces s Memory ), 磁碟或者光盘等， 包括若干指令用以使得一台计算机设备（可以是 个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例所述的方法。
本说明书中的各个实施例均采用递进的方式描述， 各个实施例之间相同 相似的部分互相参见即可， 每个实施例重点说明的都是与其他实施例的不同 之处。 尤其， 对于装置和***实施例而言， 由于其基本相似于方法实施例， 所以描述得比较简单， 相关之处参见方法实施例的部分说明即可。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应所述以权利要求的保护范围为准。

Claims

权利 要求 书
1、 一种小区之间定时同步的方法， 其特征在于， 包括：
终端接收基站发送的定时测量控制消息， 启动定时测量， 所述定时测量控 制消息中包括待测量邻小区标识；
所述终端测量服务小区与所述待测量邻小区标识对应的邻小区之间的定时 时间差；
所述终端将所述定时时间差上报给所述基站， 以便所述基站根据所述定时 时间差调整所述 Λ良务小区的定时时间， 达到与所述邻小区定时同步。
2、 根据权利要求 1所述的方法， 其特征在于， 所述定时时间差包括无线帧 级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差、 子帧号差 和***帧号差。
3、 根据权利要求 2所述的方法， 其特征在于， 所述终端测量服务小区与所 述待测量邻小区标识对应的邻小区之间的定时时间差包括：
所述终端测量所述邻小区的第一子帧的起始时刻， 以及测量所述服务小区 的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区获得的至 少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子帧；
所述终端根据所述第一子帧的起始时刻与所述第二子帧的起始时刻确定所 述参考信号时间差；
所述终端根据所述第一子帧确定所述第一子帧号， 以及根据所述第二子帧 确定所述第二子帧号， 并根据所述第一子帧号和所述第二子帧号确定所述子帧 号差；
所述终端根据所述第一子帧确定包含所述第一子帧的无线帧对应的第一系 统帧号， 以及根据所述第二子帧确定包含所述第二子帧的无线帧对应的第二系 统帧号， 并根据所述第一***帧号和所述第二***帧号确定所述***帧号差。
4、 根据权利要求 3所述的方法， 其特征在于，
所述终端根据所述第一子帧的起始时刻与所述第二子帧的起始时刻确定所 述参考信号时间差包括： 根据 RSTD=Tsubf rameRxL - Tsubf rameRxF确定所述参考信号时间差； 其 中， 所述 RSTD表示所述参考信号时间差， 所述 Tsubf rameRxL表示所述邻小区 的所述第一子帧的起始时刻， 所述 Tsubf rameRxF表示所述服务小区的所述第二 子帧的起始时刻；
所述终端根据所述第一子帧号和所述第二子帧号确定所述子帧号差包括： 根据 SBFND= (Nsubf rame_L+ 10 - Nsubf rame.F) mode 10确定所述子帧号 差； 其中， 所述 SBFND表示所述子帧号差， 所述 Nsubf rame_L表示所述邻小区 的所述第一子帧号， 所述 Nsubf rame_F表示所述服务小区的所述第二子帧号； 所述终端根据所述第一***帧号和所述第二***帧号确定所述***帧号差 包括：
根据 SFND= (Nsfn_L + 1 024 - Nsfn_F) mode 1 024确定所述***帧号差; 其中， 所述 SFND表示所述***帧号差， 所述 Nsfn_L表示所述邻小区的所述第 一***帧号， 所述 Nsfn_F表示所述服务小区的所述第二***帧号。
5、 根据权利要求 1-4中任一项所述的方法， 其特征在于， 所述定时测量控 制消息中还包括上报方式， 所述上报方式包括周期上报或者事件上报；
当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上报 周期； 当所述上报周期到达时触发测量报告上报， 所述终端将所述定时时间差 上报给所述基站；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时间 差门限； 当所述定时时间差中所述参考信号时间差大于所述时间差门限时触发 测量报告上报， 所述终端将所述定时时间差上报给所述基站。
6、 一种小区之间定时同步的方法， 其特征在于， 包括：
基站向终端发送定时测量控制消息， 所述定时测量控制消息中包括待测量 邻小区标识， 以便所述终端测量所述终端所在的服务器小区与所述待测量邻小 区标识对应的邻小区之间的定时时间差；
所述基站接收所述终端发送的所述定时时间差；
所述基站根据所述定时时间差调整服务小区的定时时间， 以达到与所述待 测量邻小区标识对应的邻小区定时同步。
7、 根据权利要求 6所述的方法， 其特征在于， 所述定时时间差包括无线帧 级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差、 子帧号差 和***帧号差。
8、 根据权利要求 7所述的方法， 其特征在于， 所述基站根据所述定时时间 差调整服务小区的定时时间包括：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1表示调整后的子帧 起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表示所述参考信号时 间差；
根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， 所述 SBFN1 表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表示所述 子帧号差；
根据 SFN1 = (SFN0 + SFND) mode 1 024 调整***帧号； 其中， 所述 SFN1 表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND表示所 述***帧号差。
9、 根据权利要求 7或 8所述的方法， 其特征在于， 在所述根据所述定时时 间差调整服务小区的定时时间之前， 还包括：
基站以第一预设功率为步长逐步降低功率， 直到所述基站下没有连接态的 终端后关闭； 和 /或，
在所述根据所述定时时间差调整服务小区的定时之后， 还包括：
基站以第二预设功率开启， 并以所述第二预设功率为步长逐步提升功率， 直到所述基站的功率达到最大设定功率时停止提升功率。
1 0、 一种小区之间定时同步的装置， 其特征在于， 包括：
接收单元， 用于接收基站发送的定时测量控制消息， 启动定时测量， 所述 定时测量控制消息中包括待测量邻小区标识；
测量单元， 用于测量服务小区与所述待测量邻小区标识对应的邻小区之间 的定时时间差； 发送单元， 用于将所述定时时间差上报给所述基站， 以便所述基站根据所 述定时时间差调整所述服务小区的定时时间， 达到与所述邻小区定时同步。
11、 根据权利要求 10所述的装置， 其特征在于， 所述定时时间差包括无线 帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差、 子帧号 差和***帧号差；
所述测量单元包括：
测量模块， 用于测量所述邻小区的第一子帧的起始时刻， 以及测量所述服 务小区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区获 得的至少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子帧； 第一确定模块， 用于根据所述第一子帧的起始时刻与所述第二子帧的起始 时刻确定所述参考信号时间差；
第二确定模块， 用于根据所述第一子帧确定所述第一子帧号， 以及根据所 述第二子帧确定所述第二子帧号， 并根据所述第一子帧号和所述第二子帧号确 定所述子帧号差；
第三确定模块， 用于根据所述第一子帧确定包含所述第一子帧的无线帧对 应的第一***帧号， 以及根据所述第二子帧确定包含所述第二子帧的无线帧对 应的第二***帧号， 并根据所述第一***帧号和所述第二***帧号确定所述系 统帧号差。
12、 根据权利要求 1 1所述的装置， 其特征在于，
所述第一确定模块用于： 根据 RSTD=Tsubf rameRxL - Tsubf rameRxF确定 所述参考信号时间差； 其中， 所述 RSTD 表示所述参考信号时间差， 所述 Tsubf rameRxL表示所述邻小区的所述第一子帧的起始时刻， 所述 Tsubf rameRxF 表示所述服务小区的所述第二子帧的起始时刻；
所述第二确定模块用于： 根据 SBFND= (Nsubf rame_L+ 10 - Nsubf rame.F) mode 10 确定所述子帧号差； 其中， 所述 SBFND 表示所述子帧号差， 所述 Nsubf rame_L表示所述邻小区的所述第一子帧号，所述 Nsubf rame_F表示所述服 务小区的所述第二子帧号； 所述第三确定模块用于：
根据 SFND= (Nsfn_L + 1 024 - Nsfn_F) mode 1 024确定所述***帧号差; 其中， 所述 SFND表示所述***帧号差， 所述 Nsfn_L表示所述邻小区的所述第 一***帧号， 所述 Nsfn_F表示所述服务小区的所述第二***帧号。
1 3、 根据权利要求 10-12 中任一项所述的装置， 其特征在于， 所述定时测 量控制消息中还包括上报方式， 所述上报方式包括周期上报或者事件上报； 当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上报 周期； 所述发送单元用于： 当所述上报周期到达时触发测量报告上报， 将所述 定时时间差上报给所述基站；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时间 差门限； 所述发送单元用于： 当所述定时时间差中所述参考信号时间差大于所 述时间差门限时触发测量报告上报， 将所述定时时间差上报给所述基站。
14、 一种小区之间定时同步的装置， 其特征在于， 包括：
发送单元， 用于向终端发送定时测量控制消息， 所述定时测量控制消息中 包括待测量邻小区标识， 以便所述终端测量所述终端所在的服务器小区与所述 待测量邻小区标识对应的邻小区之间的定时时间差；
接收单元， 用于接收所述终端发送的所述定时时间差；
调整单元， 用于根据所述定时时间差调整服务小区的定时时间， 以达到与 所述待测量邻小区标识对应的邻小区定时同步。
15、 根据权利要求 14所述的装置， 其特征在于， 所述定时时间差包括无线 帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差、 子帧号 差和***帧号差；
所述调整单元用于：
根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1表示调整后的子帧 起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表示所述参考信号时 间差；
根据 SBFN1 = (SBFN0 + SBFND) mode 10调整子帧号； 其中， 所述 SBFN1 表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表示所述 子帧号差；
根据 SFN1 = (SFN0 + SFND) mode 1 024 调整***帧号； 其中， 所述 SFN1 表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND表示所 述***帧号差。
16、 根据权利要求 14或 15所述的装置， 其特征在于， 所述装置还包括： 第一处理单元， 用于以第一预设功率为步长逐步降低功率， 直到所述装置 下没有连接态的终端后关闭； 和 /或，
第二处理单元， 用于以第二预设功率开启， 并以所述第二预设功率为步长 逐步提升功率， 直到所述装置的功率达到最大设定功率时停止提升功率。
17、 一种终端， 其特征在于， 包括：
接收器， 用于接收基站发送的定时测量控制消息， 启动定时测量， 所述定 时测量控制消息中包括待测量邻小区标识；
处理器， 用于测量服务小区与所述待测量邻小区标识对应的邻小区之间的 定时时间差；
发送器， 用于将所述定时时间差上报给所述基站， 以便所述基站根据所述 定时时间差调整所述 Λ良务小区的定时时间， 达到与所述邻小区定时同步。
18、 根据权利要求 17所述的终端， 其特征在于， 所述定时时间差包括无线 帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号 差和***帧号差；
所述处理器用于， 测量所述邻小区的第一子帧的起始时刻， 以及测量所述 服务小区的第二子帧的起始时刻， 其中， 所述第二子帧为从测量所述服务小区 获得的至少两个子帧中确定的起始时刻与所述第一子帧的起始时刻最近的子 帧；
以及根据所述第一子帧的起始时刻与所述第二子帧的起始时刻确定所述参 考信号时间差；
以及根据所述第一子帧确定所述第一子帧号， 以及根据所述第二子帧确定 所述第二子帧号， 并根据所述第一子帧号和所述第二子帧号确定所述子帧号差； 以及根据所述第一子帧确定包含所述第一子帧的无线帧对应的第一***帧 号， 以及根据所述第二子帧确定包含所述第二子帧的无线帧对应的第二***帧 号， 并根据所述第一***帧号和所述第二***帧号确定所述***帧号差。
19、 根据权利要求 18所述的终端， 其特征在于，
所述处理器用于： 才艮据 RSTD=Tsubf rameRxL - Tsubf rameRxF确定所述参 考信号时间差； 其中， 所述 RSTD表示所述参考信号时间差， 所述 Tsubf rameRxL 表示所述邻小区的所述第一子帧的起始时刻， 所述 Tsubf rameRxF表示所述服务 小区的所述第二子帧的起始时刻；
以及根据 SBFND= (Nsubf rame_L+ 10 - Nsubf rame.F) mode 1 0确定所述子 帧号差； 其中， 所述 SBFND表示所述子帧号差， 所述 Nsubf rame_L表示所述邻 小区的所述第一子帧号， 所述 Nsubf rame_F表示所述服务小区的所述第二子帧 号；
以及才艮据 SFND= (Nsfn_L + 1024 - Nsfn_F) mode 1024确定所述***帧号 差； 其中， 所述 SFND表示所述***帧号差， 所述 Nsfn_L表示所述邻小区的所 述第一***帧号， 所述 Ns f n_F表示所述服务小区的所述第二***帧号。
20、 根据权利要求 17-19 中任一项所述的终端， 其特征在于， 所述定时测 量控制消息中还包括上报方式， 所述上报方式包括周期上报或者事件上报； 当所述上报方式为所述周期上报时， 所述定时测量控制消息中还包括上报 周期； 所述处理器还用于， 当所述上报周期到达时触发测量报告上报， 将所述 定时时间差上报给所述基站；
当所述上报方式为所述事件上报时， 所述定时测量控制消息中还包括时间 差门限； 所述处理器还用于， 当所述定时时间差中所述参考信号时间差大于所 述时间差门限时触发测量报告上报， 将所述定时时间差上报给所述基站。
21、 一种基站， 其特征在于， 包括：
发送器， 用于向终端发送定时测量控制消息， 所述定时测量控制消息中包 括待测量邻小区标识， 以便所述终端测量所述终端所在的服务器小区与所述待 测量邻 d、区标识对应的邻小区之间的定时时间差；
接收器， 用于接收所述终端发送的所述定时时间差；
处理器， 用于根据所述定时时间差调整服务小区的定时时间， 以达到与所 述待测量邻小区标识对应的邻小区定时同步。
22、 根据权利要求 21所述的基站， 其特征在于， 所述定时时间差包括无线 帧级的定时时间差， 所述无线帧级的定时时间差包括参考信号时间差， 子帧号 差和***帧号差；
所述处理器用于， 根据 Tl= TO + RSTD调整子帧起始时刻； 其中， 所述 T1 表示调整后的子帧起始时刻， 所述 TO表示调整前子帧起始时刻， 所述 RSTD表 示所述参考信号时间差；
以及根据 SBFN1 = (SBFN0 + SBFND) mode 1 0调整子帧号； 其中， 所述 SBFN1 表示调整后的子帧号， 所述 SBFN0表示调整前的子帧号， 所述 SBFND表示所述 子帧号差；
以及根据 SFN1 = (SFN0 + SFND) mode 1 024调整***帧号； 其中， 所述 SFN1 表示调整后的***帧号， 所述 SFN0表示调整前的***帧号， 所述 SFND表示所 述***帧号差。
23、 根据权利要求 21或 22所述的基站， 其特征在于， 所述处理器还用于： 以第一预设功率为步长逐步降低功率， 直到所述基站下没有连接态的终端 后关闭；
以及， 以第二预设功率开启， 并以所述第二预设功率为步长逐步提升功率， 直到所述基站的功率达到最大设定功率时停止提升功率。
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