WO2013050004A1 - 一种小区发现方法、设备及系统 - Google Patents

一种小区发现方法、设备及系统 Download PDF

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Publication number
WO2013050004A1
WO2013050004A1 PCT/CN2012/082564 CN2012082564W WO2013050004A1 WO 2013050004 A1 WO2013050004 A1 WO 2013050004A1 CN 2012082564 W CN2012082564 W CN 2012082564W WO 2013050004 A1 WO2013050004 A1 WO 2013050004A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
radio frequency
user terminal
cell
frequency information
Prior art date
Application number
PCT/CN2012/082564
Other languages
English (en)
French (fr)
Inventor
蔺波
柴丽
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 EP12838268.6A priority Critical patent/EP2753127B1/en
Priority to JP2014532238A priority patent/JP6198012B2/ja
Priority to KR1020147008536A priority patent/KR101606099B1/ko
Publication of WO2013050004A1 publication Critical patent/WO2013050004A1/zh
Priority to US14/243,598 priority patent/US10555221B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a wireless communication system, and in particular, to a cell discovery method, device, and system. Background of the invention
  • connections between different types of networks are mostly connections between heterogeneous networks.
  • Various types of base stations are deployed in heterogeneous networks.
  • the user terminal finds a suitable neighboring cell to perform cell handover by searching for a measurement.
  • the user terminal initiates a blind search and measurement of other base station cells by using the indication of the serving base station, and then finds a suitable neighboring cell, after performing signal measurement on the discovered neighboring cell. Decide whether to perform cell switching.
  • Embodiments of the present invention provide a cell discovery method, device, and system, which can purposely perform small-scale search and measurement, improve search efficiency, and save power.
  • a cell discovery method includes:
  • the first base station receives, by the first base station, first radio frequency information of the handover area;
  • the first base station receives the second radio frequency information reported by the user equipment served by the first base station cell, and detects whether the second radio frequency information reported by the user equipment matches the first radio frequency information of the handover area;
  • the user terminal that reports the second radio frequency information sends a measurement indication message to indicate that the user equipment performs signal strength and/or signal quality on the cell at the frequency of the second base station cell or only the second base station cell. measuring.
  • a cell discovery method includes:
  • the second base station sends the first radio frequency information of the handover area to the first base station, so that the first base station indicates, according to the first radio frequency information of the handover area, that the user equipment is on the frequency of the second base station cell.
  • the cell or only the second base station cell performs signal strength and/or signal quality measurements.
  • a cell discovery method includes:
  • the second base station detects the proximity of the user terminal
  • the second base station notifies the first base station of the proximity information, so that the first base station indicates that the user terminal performs signal strength on the cell on the frequency of the second base station cell or only on the second base station cell. / or signal quality measurement.
  • a cell discovery method includes:
  • the first base station broadcasts the first radio frequency information of the handover area in the system message, so that the user terminal is in the case that the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area
  • a cell discovery method includes:
  • signal strength and/or signal quality measurements are made to cells on the frequency of the second base station cell or only to the second base station cell.
  • a first base station includes:
  • a first information receiving unit configured to receive first radio frequency information of the switching area
  • a second information receiving unit configured to receive second radio frequency information reported by a user terminal served by the first base station cell
  • a detecting unit configured to detect whether the second radio frequency information reported by the user terminal matches the first radio frequency information of the switching area
  • a first information sending unit configured to: when the detecting unit detects the matching, send a measurement indication message to the user terminal of the second radio frequency information, to indicate that the user terminal is the cell on the frequency of the second base station cell or only Signal strength and/or signal quality measurements are performed on the second base station cell.
  • a second base station includes:
  • a third information receiving unit configured to receive first radio frequency information of a handover area reported by a user terminal in the second base station cell
  • a second information sending unit configured to send the first radio frequency information of the handover area to the first base station, so that the first base station indicates, according to the first radio frequency information of the handover area, that the user equipment is in the second base station cell
  • the cell at the frequency or the signal strength and/or signal quality of the second base station cell is measured.
  • a second base station includes:
  • a detecting unit configured to detect proximity of the user terminal
  • An information notification unit configured to notify the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal strength on a cell on a frequency of a second base station cell or only on a second base station cell Or signal quality measurement.
  • a first base station includes:
  • a fifth information receiving unit configured to receive first radio frequency information of the switching area
  • An information broadcast unit configured to broadcast the first radio frequency information of the handover area in a system message, so that the second radio frequency information acquired by the user equipment in the user equipment itself matches the first radio frequency information of the handover area
  • the signal strength and/or signal quality measurement is performed on the cell at the frequency of the second base station cell or only the second base station cell.
  • a user terminal comprising:
  • a user receiving unit configured to receive first radio frequency information of a handover area that is broadcast by the first base station, and a user detection unit, configured to detect whether the first radio frequency information of the handover area is related to the second radio frequency information acquired by the user equipment Match
  • a user measurement unit configured to perform signal strength and/or signal quality measurement on a cell on a frequency of the second base station cell or only on the second base station cell when the user detection unit detects the match.
  • a cell discovery system comprising:
  • the first base station and the user terminal as described above.
  • the embodiment of the present invention provides a method, a device, and a system for detecting a cell, and after receiving the first radio frequency information of the handover area and receiving the second radio frequency information reported by the user equipment served by the cell of the first base station, detecting the second reported by the user terminal. Whether the radio frequency information matches the first radio frequency information of the handover area, and if yes, the user equipment that reports the second radio frequency information sends a measurement indication message to indicate that the user equipment is the cell on the frequency of the second base station cell or only The signal strength and/or signal quality measurement is performed on the second base station cell, so that small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.
  • the second base station detects the proximity of the user terminal and notifies the first base station to the proximity information, so that the first base station indicates that the user terminal performs the cell on the frequency of the second base station cell or only the second base station cell.
  • Signal strength And/or signal quality measurement so that small-scale search and measurement can be performed purposefully, which improves the efficiency of search and saves power.
  • the first radio frequency information of the handover area between the first base station and the second base station is received by the first base station, the first radio frequency information of the handover area is broadcasted in the system message, so that the user terminal obtains the user terminal itself.
  • the signal strength and/or the signal quality of the cell on the frequency of the second base station cell or only the second base station cell are measured, so that the target can be purposefully
  • the small-scale search and measurement improves the efficiency of the search and saves power.
  • FIG. 1 is a flowchart of a cell discovery method according to Embodiment 1;
  • FIG. 3 is a flowchart of another cell discovery method provided by Embodiment 1;
  • Embodiment 4 is a flowchart of another cell discovery method provided by Embodiment 1;
  • FIG. 5 is a flowchart of another cell discovery method provided by Embodiment 1;
  • Embodiment 6 is a flowchart of another cell discovery method provided by Embodiment 2.
  • FIG. 7 is a scenario diagram of a cell discovery method provided by an embodiment
  • Embodiment 9 is a flowchart of another cell discovery method provided by Embodiment 3.
  • FIG. 10 is a flowchart of a cell discovery method according to Embodiment 4.
  • FIG. 11 is a structural block diagram of a first base station according to Embodiment 5.
  • FIG. 12 is a structural block diagram of a second base station according to Embodiment 5;
  • FIG. 13 is a structural block diagram of another second base station provided by the implementation.
  • FIG. 14 is a block diagram of another second base station structure provided by the implementation.
  • FIG. 15 is a block diagram of another second base station structure provided by the implementation.
  • FIG. 16 is a block diagram of another first base station structure provided by the implementation.
  • FIG. 17 is a block diagram of another first base station structure provided by the implementation.
  • 19 is a block diagram showing another first base station structure provided by the implementation.
  • FIG. 20 is a schematic diagram of a cell discovery system provided by an implementation
  • 21 is a schematic diagram of another cell discovery system provided by the implementation.
  • the handover area described in Embodiments 1 to 5 provided by the present invention refers to an area where the user terminal switches from the second base station to the first base station.
  • the first radio frequency information of the handover area carries the frequency information of the cell of the second base station corresponding to the handover area or/and the cell identifier of the second base station.
  • the user terminal that measured the second radio frequency information and the user terminal that performs the measurement of the signal strength and/or the signal quality may be the same or different in the embodiments 1 to 5 provided by the present invention.
  • the embodiment of the present invention provides a cell discovery method, where the method is used on the first base station side. As shown in FIG. 1, the method includes the following steps: 101.
  • the first base station receives the first radio frequency information of the handover area.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the first base station receives the second radio frequency information reported by the user equipment served by the first base station cell.
  • the user equipment served by the first base station cell periodically reports the second radio frequency information to the first base station serving the user at a predetermined time interval, and the second radio frequency information is measured by the user terminal at the location of the user, so the second The radio frequency information can map the geographic information of the location of the user terminal.
  • the first radio frequency information may be mapped to the geographic information of the handover area
  • the second radio frequency information may be mapped to the geographic information of the location of the user terminal, so that the second radio frequency information reported by the user terminal is detected to be related to the first radio frequency information of the handover area. If the matching is performed, it can be determined whether the user terminal reporting the second radio frequency information is close to the switching area.
  • the user terminal that sends the second radio frequency information sends a measurement indication message to indicate that the user equipment performs signal strength and/or signal quality measurement on the cell at the frequency of the second base station cell or only the second base station cell. .
  • the first The base station sends a measurement indication message to the user terminal that reports the second radio frequency information that matches the first radio frequency information of the handover area, where the measurement indication message includes the frequency information or/and the cell of the second base station.
  • the cell identifier of the second base station may indicate that the user equipment performs signal strength and/or signal quality measurement on the frequency of the cell of the second base station, or performs signal strength and/or only on the cell of the second base station. Signal quality measurement.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; and the user terminal switching to the target base station cell.
  • the method provided by the embodiment of the present invention is further applied to the side of the second base station, and the following steps are included as shown in FIG. 2:
  • the second base station receives the first radio frequency information of the handover area reported by the user equipment served by the second base station cell.
  • the user terminal served by the cell of the second base station in the handover area sends the first radio frequency information measured by the user terminal at the location where the user terminal is located before the cell handover to the first base station, where the first radio frequency
  • the information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the second base station sends the first radio frequency information of the handover area to the first base station.
  • the second base station sends the first radio frequency information of the handover area to the first base station through the X2, IUR, Sl, IU interface or the wireless air interface (such as the interface between the microwave or the donor base station and the relay node), so that the first base station is configured according to the first base station.
  • the first radio frequency information of the handover area indicates that the user equipment performs signal strength and/or signal quality measurement on the cell at the frequency of the second base station cell or only the second base station cell, where the action of the first base station is
  • the cell discovery method is specifically described on the side of the first base station, and details are not described herein again.
  • the cell discovery method receives the first radio frequency information of the handover area by the first base station, and receives the second radio frequency information reported by the user equipment served by the first base station cell, and then detects the second radio information reported by the user equipment. Whether the radio frequency information is first shot with the switching area If the frequency information is matched, the user equipment that reports the second radio frequency information sends a measurement indication message to indicate that the user equipment performs signal strength on the cell on the frequency of the second base station cell or only on the second base station cell. Or signal quality measurement, so that small-scale search and measurement can be performed purposefully, which improves the efficiency of search and saves power.
  • the embodiment of the invention further provides a cell discovery method, which is used on the side of the second base station. As shown in FIG. 3, the method includes the following steps:
  • the second base station detects the proximity of the user terminal.
  • the second base station device is provided with a receiver, so that the uplink receiving function can be supported, and the uplink message sent by the user terminal is detected, thereby detecting that the user terminal is close to the second base station.
  • the second base station notifies the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal strength and/or signal quality measurement on the cell on the frequency of the second base station cell or only on the second base station cell.
  • the second base station notifies the first base station of the proximity information through the X2, IUR, Sl, IU interface or wireless air interface (e.g., the interface between the microwave or the host base station and the relay node).
  • the second base station When the second base station detects the proximity of the user terminal, the second base station notifies the first base station of the information, and the proximity information includes the information about the user terminal that is close to the second base station and the second base station.
  • the frequency information of the cell or/and the cell identity of the second base station, the first base station indicating, according to the proximity information, that the user terminal close to the second base station performs signal strength and/or signal quality on the frequency of the second base station Measuring, or only performing signal strength and/or signal quality measurements on the second base station.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; the user terminal switching to the target base station Community.
  • a cell discovery method is also provided by the second base station to notify the user of the proximity of the user terminal and notify the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal quality measurement, so that the target can be purposefully
  • the small-scale search and measurement improves the efficiency of the search and saves power.
  • the embodiment of the present invention further provides a cell discovery method, which is used on the first base station side. As shown in FIG. 4, the method includes the following steps:
  • the first base station receives the first radio frequency information of the handover area.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the first base station broadcasts the first radio frequency information of the handover area in the system message, so that the user terminal is in the second when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area.
  • the signal strength and/or signal quality measurement is performed on the cell at the frequency of the base station cell or only on the second base station cell.
  • the first base station After receiving the first radio frequency information of the handover area, the first base station broadcasts the first radio frequency information in the system message, and the user equipment under the service of the first base station cell can receive the first radio frequency information.
  • the user terminal periodically measures the second radio frequency information of the area in which the user is located, so the second radio frequency information can map the geographic information of the location where the user terminal is located. If the user terminal detects that the second radio frequency information matches the first radio frequency information of the handover area, it can determine that the user terminal is close to the handover area, and then the user terminal can be started at the second base station. Signal strength and/or signal quality measurements are made on the frequency of the cell, or signal strength and/or signal quality measurements are only made to the second base station cell.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the form of the report is reported to the first base station, if the measurement result is satisfied
  • the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends a handover response to the first base station; the first base station sends the handover request to the user equipment. Switching command; the user terminal switches to the target base station cell.
  • the method is applied to the user terminal side, and the following steps are included as shown in FIG. 5:
  • the user terminal receives first radio frequency information of a handover area broadcast by the first base station.
  • the handover area is an area covered by a location where all user terminals of the first base station cell are switched from the second base station cell.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user terminal in the handover area, and it can be seen that the first radio frequency information can be mapped and switched. Geographic information of the area.
  • the first base station After receiving the first radio frequency information of the handover area, the first base station broadcasts the first radio frequency information in the system message, and the user equipment under the service of the first base station cell can receive the first radio frequency information.
  • the user terminal periodically measures the second radio frequency information of the area in which the user is located, so the second radio frequency information can map the geographic information of the location of the user terminal.
  • the user terminal automatically detects whether the second radio frequency information matches the first radio frequency information of the handover area, thereby determining whether the user terminal is close to the handover area.
  • the user terminal If the user terminal detects that the second radio frequency information matches the first radio frequency information of the handover area, it can determine that the user terminal is close to the handover area, and the user terminal can start the user terminal in the Signal strength and/or signal quality measurements are made on the frequency of the cells of the two base stations, or signal strength and/or signal quality measurements are only made to the cells of the second base station.
  • signal strength and/or signal quality measurement a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station.
  • the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; and the user terminal switching to the target base station cell.
  • the cell discovery method of the present invention further provides that the first radio frequency information of the handover area between the first base station and the second base station is received by the first base station; and the first radio frequency information of the handover area is broadcast in the system message. So that the user terminal performs signal strength on the cell at the frequency of the second base station cell or only on the second base station cell when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area / or signal quality measurement, which can be used for small-scale search and measurement, improve the efficiency of search, and save power.
  • the first base station in Embodiment 1 of the present invention may be a macro base station
  • the second base station may be a small power base station or a macro base station.
  • the low-power base station includes but is not limited to a pico base station, an RRH (Remote Radio Head), an RRU (Radio Remote Unit), a Relay, a NB (NodeB, a base station node), and a BS. (Base Station Controller, base station), femto (home base station), LTE HIFI (high speed network), WIFI (wireless broadband), user equipment under D2D, etc.
  • the embodiment of the invention provides a cell discovery method. As shown in FIG. 6, the method includes the following steps:
  • the second base station receives the first radio frequency information of the handover area reported by the user equipment in the second base station cell.
  • the first radio frequency information of the handover area includes at least one of the following: RSRP (reference signal received power), RSRQ (reference signal received Quality, reference signal reception quality) and AOA (angle of arrival).
  • RSRP reference signal received power
  • RSRQ reference signal received Quality, reference signal reception quality
  • AOA angle of arrival
  • the user terminal served by the second base station cell is in the handover area, and the user equipment sends the first radio frequency information measured by the user terminal at the location of the user equipment to the second base station before the handover to the first base station cell, where the first radio frequency
  • the information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the user equipment served by the second base station cell reports the first radio frequency information of the handover area to the second base station.
  • the second base station sends the first radio frequency information of the handover area to the first base station.
  • the second base station After receiving the first radio information of the handover area reported by the user equipment in the second base station cell, the second base station sends the information to the first base station, where the first base station receives the first radio frequency information of the handover area sent by the second base station. .
  • the method of 601-602 is that the first base station receives the first radio frequency information of the handover area sent by the second base station, and the first radio frequency information of the handover area is reported by the user terminal served by the second base station cell to the second base station.
  • the first base station may also receive the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the serving base station of the user terminal changes from the second base station to the first base station, and at this time, the first base station immediately starts the user terminal to measure the area where the user is located.
  • the first radio frequency information the user terminal sends the first radio frequency information of the measured handover area to the first base station.
  • the first base station receives the second radio frequency information reported by the user equipment served by the first base station d and the area.
  • the second radio frequency information includes at least one of the following: RSRP, RSRQ, and A0A.
  • the user equipment served by the first base station cell periodically reports the second radio frequency information to the first base station of the serving base station, and the second radio frequency information is measured by the user terminal at the location of the user, so the second radio frequency information can be mapped. Geographic information of the location of the user terminal. 604. Check whether the second radio frequency information reported by the user terminal matches the first radio frequency information of the handover area.
  • the first radio frequency information may be mapped to the geographic information of the handover area
  • the second radio frequency information may be mapped to the geographic information of the location of the user terminal, so that the second radio frequency information reported by the user terminal is detected to be related to the first radio frequency information of the handover area. If the matching is performed, it can be determined whether the user terminal reporting the second radio frequency information is close to the switching area.
  • the method is: detecting whether the second radio frequency information reported by the user equipment is in the radio frequency interval value of the first radio frequency information in the handover area.
  • the second radio frequency information reported by the user terminal is an RSRP value
  • the first radio frequency information of the handover area is an RSRP value
  • the radio frequency interval value of the first radio frequency information of the handover area is an interval value of the RSRP. Therefore, the matching method is to detect whether the RSRP value in the second radio frequency information reported by the user terminal is within an interval value of the RSRP formed by the RSRP value of the first radio frequency information.
  • the optional second radio frequency information on the user terminal may include an RSRP value, and/or an RSRQ value, and/or an AOA value. Therefore, it is possible to detect whether the RSRP value, and/or the RSRQ value, and/or the AOA value in the second radio frequency information reported by the user equipment are in the RSRP value, and/or the RSRQ value of the first radio frequency information in the handover area, and / or within the interval value of the RSRP value, and / or RSRQ value, and / or AOA value formed by the AOA value.
  • the RF information includes any two or three of the RSRP value, the RSRQ value, and the AOA value, the method of detecting whether the matching is more accurate can be made more accurate.
  • Another method is to detect whether the difference between the second radio frequency information reported by the user terminal and the first radio frequency information of the handover area is within a preset radio frequency threshold.
  • the second radio frequency information on the user terminal is an RSRP value
  • the first radio frequency information of the handover area is an RSRP value
  • the first base station is configured with a preset RSRP threshold value
  • the matching method is detection. Whether the difference between the RSRP value in the second radio frequency information reported by the user terminal and the RSRP value of the first radio frequency information is within a preset RSRP threshold.
  • the optional second radio frequency information on the user terminal may include an RSRP value, and / Or an RSRQ value, and/or an AOA value, so that an RSRP value, and/or an RSRQ value, and/or an AOA value in the second radio frequency information reported by the user terminal, and an RSRP value of the first radio frequency information, And/or whether the difference between the RSRQ value, and/or the AOA value is within a preset RSRP threshold, and/or within a preset RSRQ threshold, and/or within a preset AOA threshold.
  • the RF information includes any two or three of the RSRP value, the RSRQ value, and the AOA value
  • the method of detecting whether the matching is more accurate may be more accurate.
  • the user terminal reporting the second radio frequency information sends a measurement indication message to indicate that the user equipment performs signal strength and/or signal quality on the cell at the frequency of the second base station cell or only the second base station cell. measuring.
  • the first The base station sends a measurement indication message to the user terminal that reports the second radio frequency information that matches the first radio frequency information of the handover area, where the measurement indication message includes the frequency information or/and the cell of the second base station.
  • the cell identifier of the second base station may indicate that the user equipment performs signal strength and/or signal quality measurement on the frequency of the cell of the second base station, or performs signal strength and/or only on the cell of the second base station. Signal quality measurement.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; and the user terminal switching to the target base station cell.
  • the first base station in the second embodiment of the present invention may be a macro base station
  • the second base station may be a small power base station or a macro base station.
  • small power base stations include but are not limited to pico base stations, RRH (Remote Radio Head), RRU (Radio Remote) Unit, radio remote module), Relay, NB (NodeB, base station node), BS (Base Station Controller), femto (home base station), LTE HIFI (high speed network), WIFI (wireless broadband), User equipment under D2D, etc.
  • a macro base station 1 a macro base station 2, and a macro base station 3, which are covered by the three macro base stations.
  • the cells are macro cell 1, macro cell 2, and macro cell 3.
  • the macro cell 3 includes several small power base stations such as a pico base station 1, a pico base station 2, and a pico base station 3.
  • the pico base station 1, the pico base station 2, and the pico base station 3 transmit the first of the handover areas of the pico cell 1, the pico cell 2, and the pico cell 3 to the macro base station 1, the macro base station 2, and the macro base station 3 according to a preset time interval.
  • Radio frequency information where the first radio frequency information includes an RSRP interval value and an AOA interval value of a handover area of the pico cell 1, the pico cell 2, and the pico cell 3, and the macro base stations 1, 2, and 3 receive the pico cell 1, 2
  • the first radio frequency information of the switching area of 3, 3 will store this information.
  • the macro base stations 1, 2, and 3 can also receive the first radio frequency information of the handover area that is sent by the user terminal that has just been switched from the pico cell to the macro cell, and the user terminal 3 in the macro cell 3 is just received by the pico cell 1 Switching to the macro cell 3, the macro cell 3 immediately starts the first radio frequency information of the user terminal 3 to measure the location of the user, and the user terminal 3 reports the first radio frequency information to the macro base station 3, and the macro base station 3 receives the information and stores the information. .
  • the user terminals 1, 2, 3, and 4 of the macro cell 3 service periodically send the second radio frequency information to the serving base station macro base station 3 according to the preset time interval, and the second radio frequency information is used by the user terminal.
  • the second radio frequency information includes a user terminal 1, 2
  • the macro base station 3 detects whether the RSRP value and the AOA value in the received second radio frequency information are in the RSRP interval value and the AOA interval value in the first radio frequency information, and can detect the second radio frequency on the user terminal 2 by detecting
  • the RSRP value in the message is 14W and the AOA value is 48 degrees in pico.
  • the macro base station 3 determines that the user terminal 2 is close to the pico cell 1 and the macro base station 3 can indicate the user that the RSRP interval value in the first radio frequency information of the cell 1 switching area is 10W ⁇ 20W and the AOA interval value is between 45 degrees and 60 degrees.
  • the terminal 2 performs signal quality measurement on the pico cell 1.
  • the macro base station 3 recalls that the pico base station 1 sends a handover request, and the pico base station 1 according to the resource condition of the base station cell. Determining to accept the user terminal 2, the pico base station 1 transmits a handover response to the macro base station 3, and the macro base station 3 transmits a handover command to the user terminal 2; the user terminal 2 switches to the pico cell 1.
  • the cell discovery method receives the first radio frequency information of the handover area by the first base station, and receives the second radio frequency information reported by the user equipment served by the first base station cell, and then detects the second radio information reported by the user equipment. Whether the radio frequency information matches the first radio frequency information of the handover area; if yes, the user equipment that reports the second radio frequency information sends a measurement indication message to indicate that the user equipment is on the cell at the frequency of the second base station cell or The signal strength and/or signal quality measurement is performed only on the second base station cell, so that small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.
  • the embodiment of the present invention further provides a cell discovery method. As shown in FIG. 8, the method includes the following steps:
  • the second base station receives the uplink resource information of the first base station d and the user terminal served by the first base station.
  • the uplink resource information includes a C-RNTI (Cell Radio Network Temporary Identifier), a PCI (Physical Cell Identifier), an SRS (Sounding Reference Symbol), and the like.
  • C-RNTI Cell Radio Network Temporary Identifier
  • PCI Physical Cell Identifier
  • SRS Sounding Reference Symbol
  • the second base station is provided with a receiver that can receive an uplink transmission signal of the user terminal served by the first base station cell, so that the uplink receiving function can be supported, and the first base station can be received through the X2 port, the S1 port, the private interface, or the air interface.
  • the uplink of the user terminal served by the first base station cell Resource information.
  • the second base station detects the corresponding user terminal according to the uplink resource information.
  • the second base station performs the detection according to the uplink resource information, and if the corresponding user terminal is detected, the uplink signal sent by the corresponding user terminal may be parsed according to the uplink resource information.
  • the second base station detects that the transmit power of the uplink signal of the corresponding user terminal exceeds a preset power threshold, and concludes that the user terminal is close to the second base station.
  • the second base station is provided with a receiver, so that the uplink receiving function can be supported, and the uplink signal sent by the user terminal can be detected, if the second base station detects the corresponding user terminal.
  • the second base station notifies the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal quality measurement.
  • the proximity information includes a user identifier, and the proximity information includes the frequency information of the d, the area of the second base station or/and the cell identifier of the second base station, and the first base station can identify the proximity according to the user identifier.
  • a user terminal of the second base station and indicating that the user terminal can be instructed to perform signal strength and/or signal quality measurement on the frequency of the cell of the second base station, or only to perform signal strength and/or signal on the cell of the second base station Quality measurement.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; and the user terminal switching to the target base station cell.
  • the embodiment of the invention further provides a cell discovery method. As shown in FIG. 9, the method includes the following steps:
  • the second base station detects that the transmit power of the uplink signal of the user terminal exceeds a preset power gate. Limit, it is concluded that the user terminal is close to the second base station.
  • the second base station is configured with a receiver that can receive an uplink transmission signal of the user terminal served by the first base station cell, so that the uplink receiving function can be supported, and the uplink message sent by the user terminal can be detected, if the second base station detects If the transmit power of the uplink signal of the user terminal exceeds the preset power threshold, it can be inferred that the user terminal is close to the second base station.
  • the second base station detects the uplink signal sent by the user terminal, and when detecting that the transmit power of the uplink signal of the user terminal exceeds the preset power threshold, the resource information used by the user terminal may also be identified, where the resource information is Resource information for the frequency domain, and/or time domain, and/or code domain, and/or spatial domain.
  • the resource information of the frequency domain, and/or time domain, and/or code domain, and/or spatial domain includes a PRB physical radio resource block index number, and/or time domain information, and/or a code sequence index number, and / or space resource block index number.
  • the second base station notifies the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal quality measurement.
  • the information is notified to the first base station by the information close to the information, where the proximity information includes resource information used by the user terminal, and the proximity information may be included in the proximity information.
  • the frequency information of the cell of the second base station and/or the cell identifier of the second base station, the first base station may identify the user terminal that is close to the second base station according to the user identifier in the proximity information or the resource information used by the user terminal, and Instructing it to perform signal strength and/or signal quality measurements on the frequency of the cell of the second base station, or to perform signal strength and/or signal quality measurements only on the cells of the second base station.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the form of the report is reported to the first base station, if the measurement result is satisfied
  • the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends a handover response to the first base station; the first base station sends the handover request to the user equipment. Switching command; the user terminal switches to the target base station cell.
  • the first base station in Embodiment 3 of the present invention may be a macro base station
  • the second base station may be a small power base station or a macro base station.
  • the low-power base station includes but is not limited to a pico base station, an RRH (Remote Radio Head), an RRU (Radio Remote Unit), a Relay, a NB (NodeB, a base station node), and a BS. (Base Station Controller, base station), femto (home base station), LTE HIFI (high speed network), WIFI (wireless broadband), user equipment under D2D, etc.
  • a macro base station 1 a macro base station 2, and a macro base station 3
  • the cells covered by the macro base station are macro cell 1, macro cell 2, and macro cell 3.
  • the macro cell 3 contains a number of small power base stations such as a pico base station 1, a pico base station 2, and a pico base station 3.
  • the user terminals under the macro cell 3 service include a user terminal 1, a user terminal 2, a user terminal 3, and a user terminal 4.
  • the pico base station 1, 2, 3 is provided with a receiver, which can support the uplink receiving function, and the macro base station 3 transmits the user terminal under the macro cell 3 service to the pico base station 1, 2, 3 through the X2 port, the S1 port, the private interface or the air interface.
  • the uplink resource information of the 1, 2, 3, and 4 includes a C-RNTI (Cellular Network Temporary Identifier), a PCI (Physical Cell Identifier), and a SRS (Sounding Reference) Symbol, sounding reference symbols, etc.
  • the pico base stations 1, 2, 3 detect the air interface according to the uplink resource information, and can detect the user terminals 1, 2, 3, and 4, and parse the user terminals 1, 2, 3 from the uplink resource information of the corresponding user terminal.
  • the user identifiers of the user terminal 2, UEID2, UEID3, and UEID4, and the pico base stations 1, 2, and 3 detect the uplink information sent by the user terminal after detecting the corresponding user terminal, where the pico base station 1 can detect the user terminal 2 If the transmit power of the uplink signal is 30 W and the preset power threshold is 20 W, it can be inferred that the user terminal 2 is close to the pico.
  • the cell 1 transmits the user identity UEID2 of the user terminal 2 to the macro base station 3, and the macro base station 3 instructs the user terminal 2 to perform signal quality measurement on the pico cell 1 according to the received user identity UEID2.
  • the pico base station may not receive the uplink resource information sent by the macro base station, and the pico base station 1 may also detect the resource used by the user terminal 2 when detecting that the transmit power of the uplink signal of the user terminal 2 exceeds a preset power threshold.
  • the resource information includes at least one of a PRB physical radio resource block index number, time domain information, a code sequence index number, and a space resource block index number.
  • the pico base station 1 transmits the user identifier UEID2 of the user terminal 2 or the resource information of the frequency domain, and/or the time domain, and/or the code domain, and/or the spatial domain of the user terminal 2 to the macro base station 3, and the macro base station 3
  • the received user identifier UEID2 indicates that the user terminal 2 performs signal quality measurement on the pico cell 1, or because the resource information of the user terminal 2 in the serving cell macro cell 3 is configured by the serving macro base station, the macro base station 3 can be configured according to the user terminal 2
  • the resource information of the frequency domain, and/or the time domain, and/or the code domain, and/or the spatial domain identifies the user terminal 2 and instructs the user terminal 2 to perform signal quality measurement on the pico cell 1.
  • the macro base station 3 recalls that the pico base station 1 sends a handover request, and the pico base station 1 according to the resource condition of the base station cell. Determining to accept the user terminal 2, the pico base station 1 transmits a handover response to the macro base station 3, and the macro base station 3 transmits a handover command to the user terminal 2; the user terminal 2 switches to the pico cell 1.
  • a cell discovery method is also provided by the second base station to notify the user of the proximity of the user terminal and notify the first base station of the proximity information, so that the first base station instructs the user terminal to perform signal quality measurement, so that the target can be purposefully
  • the small-scale search and measurement improves the efficiency of the search and saves power.
  • the embodiment of the invention further provides a cell discovery method. As shown in FIG. 10, the method includes The following steps:
  • the second base station receives the first radio frequency information of the handover area reported by the user equipment in the second base station cell.
  • the first radio frequency information of the handover area includes a reference signal received power RSRP, and/or a reference signal received quality RSRQ, and/or an angle of arrival AOA.
  • the user terminal served by the second base station cell is in the handover area, and the user equipment sends the first radio frequency information measured by the user terminal at the location of the user equipment to the second base station before the handover to the first base station cell, where the first radio frequency
  • the information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the user equipment served by the second base station cell reports the first radio frequency information of the handover area to the second base station.
  • the second base station sends, to the first base station, first radio frequency information of the handover area, where
  • the second base station After receiving the first radio information of the handover area reported by the user equipment in the second base station cell, the second base station sends the information to the first base station, where the first base station receives the first radio frequency information of the handover area sent by the second base station. .
  • the method of 1001-1002 is that the first base station receives the first radio frequency information of the handover area sent by the second base station, and the first radio frequency information of the handover area is reported by the user terminal served by the cell of the second base station to the second base station.
  • the first base station may also receive the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the serving base station of the user terminal changes from the second base station to the first base station, and at this time, the first base station immediately starts the user terminal to measure the area where the user is located.
  • the first radio frequency information the user terminal sends the first radio frequency information of the measured handover area to the first base station.
  • the first base station broadcasts the first radio frequency information of the handover area in a system message.
  • the first base station After receiving the first radio frequency information of the handover area, the first base station is in the first radio frequency information In the system message broadcast, the user terminal under the service of the first base station cell can receive the first radio frequency information.
  • the user equipment detects whether the first radio frequency information of the handover area matches the second radio frequency information obtained by the user terminal itself.
  • the second radio frequency information includes reference signal received power RSRP, and/or reference signal received quality RSRQ, and/or angle of arrival AOA.
  • the user terminal periodically measures the second radio frequency information of the area in which the user is located, so the second radio frequency information can map the geographic information of the location of the user terminal.
  • the user terminal automatically detects whether the second radio frequency information matches the first radio frequency information of the handover area, thereby determining whether the user terminal is close to the handover area.
  • the method is: detecting whether the second radio frequency information reported by the user equipment is in the radio frequency interval value of the first radio frequency information in the handover area.
  • the second radio frequency information reported by the user terminal is an RSRP value
  • the first radio frequency information of the handover area is an RSRP value
  • the radio frequency interval value of the first radio frequency information of the handover area is an interval value of the RSRP. Therefore, the matching method is to detect whether the RSRP value in the second radio frequency information reported by the user terminal is within an interval value of the RSRP formed by the RSRP value of the first radio frequency information.
  • the optional second radio frequency information on the user terminal may include an RSRP value, and/or an RSRQ value, and/or an AOA value. Therefore, it is possible to detect whether the RSRP value, and/or the RSRQ value, and/or the AOA value in the second radio frequency information reported by the user equipment are in the RSRP value, and/or the RSRQ value of the first radio frequency information in the handover area, and / or within the interval value of the RSRP value, and / or RSRQ value, and / or AOA value formed by the AOA value.
  • the RF information includes any two or three of the RSRP value, the RSRQ value, and the AOA value, the method of detecting whether the matching is more accurate can be made more accurate.
  • Another method is to detect whether the difference between the second radio frequency information reported by the user terminal and the first radio frequency information of the handover area is within a preset radio frequency threshold.
  • the second radio frequency information on the user terminal is an RSRP value
  • the first radio frequency information in the handover area is an RSRP value.
  • the first base station is configured with a preset RSRP threshold
  • the matching method is to detect whether the difference between the RSRP value in the second radio information reported by the user equipment and the RSRP value of the first radio information is preset.
  • the RSRP threshold Within the RSRP threshold.
  • the optional second radio frequency information on the user terminal may include an RSRP value, and/or an RSRQ value, and/or an AOA value, so that the RSRP value in the second radio frequency information reported by the user terminal may be detected, and And/or whether the difference between the RSRQ value, and/or the AOA value and the RSRP value of the first radio frequency information, and/or the RSRQ value, and/or the AOA value is within a preset RSRP threshold, and/or a preset Within the RSRQ threshold, and/or within the preset AOA threshold.
  • the RF information includes any two or three of the RSRP value, the RSRQ value, and the AOA value
  • the method of detecting whether the matching is more accurate can be made more accurate.
  • the user terminal If the user terminal detects that the second radio frequency information matches the first radio frequency information of the handover area, it can be determined that the user terminal is close to the handover area.
  • the user terminal automatically starts measuring the signal strength and/or signal quality for the cell on the frequency of the second base station cell or only the second base station cell.
  • the user terminal If the user terminal is in the connected state, the user terminal sends a user notification message to the first base station, and the first base station instructs the user terminal to perform signal quality measurement according to the received user notification message.
  • the first base station in Embodiment 4 of the present invention may be a macro base station
  • the second base station may be a small power base station or a macro base station.
  • the low-power base station includes but is not limited to a pico base station, an RRH (Remote Radio Head), an RRU (Radio Remote Unit), a Relay, a NB (NodeB, a base station node), and a BS. (Base Station Controller, base station), femto (home base station), LTE HIFI (high speed network), WIFI (wireless broadband), user equipment under D2D, etc.
  • steps 1001 and 1005 of this embodiment will be exemplified below.
  • a macro base station 1 a macro base station 2, and a macro base station 3.
  • the cells covered by the three macro base stations are a macro cell 1, a macro cell 2, and a macro cell 3.
  • the macro cell 3 includes a number of small power base stations such as a pico base station 1, a pico base station 2, and a pico base station 3.
  • the pico base station 1, the pico base station 2, and the pico base station 3 transmit the first of the handover areas of the pico cell 1, the pico cell 2, and the pico cell 3 to the macro base station 1, the macro base station 2, and the macro base station 3 according to a preset time interval.
  • Radio frequency information where the first radio frequency information includes an RSRP interval value and an AOA interval value of the handover area of the pico cell 1, the pico cell 2, and the pico cell 3, and the macro base stations 1, 2, and 3 receive the pico cell 1.
  • the first RF information of the switching area of 2, 3 will store this information.
  • the macro base stations 1, 2, and 3 can also receive the first radio frequency information of the handover area that is sent by the user terminal that has just been switched from the pico cell to the macro cell, and the user terminal 3 in the macro cell 3 is just received by the pico cell 1 Switching to the macro cell 3, the macro cell 3 immediately starts the first radio frequency information of the user terminal 3 to measure the location of the user, and the user terminal 3 reports the first radio frequency information to the macro base station 3, and the macro base station 3 receives the information and stores the information. .
  • the macro base station 1, 2, 3 broadcasts the first radio frequency information in the system message, and all the user terminals under the service of the macro base station 1, 2, 3 will receive the first radio frequency information, such as the user under the service of the macro base station 3.
  • the first radio frequency information will be received by the terminal 1, 2, 3, and 4, and the user terminal 1, 2, 3, and 4 will measure the second radio frequency information of the local area according to the preset time timing, and the second radio frequency information.
  • the user terminal 1, 2, 3, 4 is measured at its own location, and the second radio frequency information includes the RSRP value and the A0A value of the user terminal 1, 2, 3, 4 at their own location.
  • the user terminals 1, 2, 3, 4 will detect whether the RSRP value and the AOA value in the second radio frequency information measured by themselves are within the RSRP interval value and the AOA interval value in the first radio frequency information.
  • the user terminal 2 detects that the RSRP value 14W and the AOA value of the second radio frequency information measured by the user terminal are in the RSRP interval value in the first radio frequency information of the pico cell 1 handover area. When the 10W-20W and AOA interval values are within 45 degrees to 60 degrees, the user terminal 2 determines that it is close to the pico cell 1.
  • the user terminal 2 If the user terminal 2 is in the idle state, the user terminal 2 initiates signal quality measurement on the pico cell 1 by itself.
  • the user terminal 2 If the user terminal 2 is in the connected state, the user terminal 2 transmits a user notification message to the macro base station 3, and the macro base station 3 instructs the user terminal 2 to perform signal quality measurement on the pico cell 1 according to the received user notification message.
  • the cell discovery method of the present invention further provides that the first radio frequency information of the handover area between the first base station and the second base station is received by the first base station; and the first radio frequency information of the handover area is broadcast in the system message. So that the user terminal performs signal quality measurement when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area, so that small-scale search and measurement can be performed purposefully, and the search efficiency is improved. And it has the effect of saving electricity.
  • the embodiment of the present invention provides a first base station.
  • the first base station includes: a first information receiving unit 1101, a second information receiving unit 1102, a detecting unit 1103, and a first information transmitting unit 1104.
  • the first information receiving unit 1101 is configured to receive first radio frequency information of the handover area.
  • the first information receiving unit 1101 is configured to receive the first radio frequency information of the handover area sent by the second base station, where the first radio frequency information of the handover area is reported by the user terminal served by the second base station cell Two base stations.
  • the first information receiving unit 1101 is further configured to receive the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the second information receiving unit 1102 is configured to receive second radio frequency information reported by the user equipment served by the first base station cell.
  • the user equipment served by the first base station cell periodically reports the second radio frequency information to the first base station serving the user at a predetermined time interval, and the second radio frequency information is measured by the user terminal at the location of the user, so the second The radio frequency information can map the geographic information of the location of the user terminal.
  • the detecting unit 1103 is configured to detect whether the second radio frequency information reported by the user terminal matches the first radio frequency information of the switching area.
  • the first radio frequency information may be mapped to the geographic information of the handover area
  • the second radio frequency information may be mapped to the geographic information of the location of the user terminal, so that the second radio frequency information reported by the user terminal is detected to be related to the first radio frequency information of the handover area. If the matching is performed, it can be determined whether the user terminal reporting the second radio frequency information is close to the switching area.
  • the method for detecting whether the matching is performed may be: detecting whether the second radio frequency information reported by the user terminal is in the radio frequency interval value of the first radio frequency information of the switching area, or detecting the second radio frequency information reported by the user terminal and the switching Whether the difference of the first radio frequency information of the area is within a preset radio frequency threshold.
  • the first information sending unit 1104 is configured to: when the detecting unit detects the matching, the user terminal that reports the second radio frequency information sends a measurement indication message to indicate that the user terminal is in the cell on the frequency of the second base station cell or only Signal strength and/or signal quality measurements are performed on the second base station cell.
  • the first The base station sends a measurement indication message to the user terminal that reports the second radio frequency information that matches the first radio frequency information of the handover area, where the measurement indication message includes the frequency information or/and the cell of the second base station.
  • the cell identifier of the second base station may indicate that the user equipment performs signal strength and/or signal quality measurement on a frequency of a cell of the second base station, or Signal strength and/or signal quality measurements are only made to the cells of the second base station.
  • the first radio frequency information of the handover area and the second radio frequency information of the user terminal include a reference signal received power RSRP, and/or a reference signal received quality RSRQ, and/or an angle of arrival AOA.
  • the first base station provided in this embodiment may be used to implement the method corresponding to the embodiment shown in FIG. 1.
  • the embodiment of the present invention further provides a second base station, as shown in FIG. 12, including a third information receiving unit 1201 and a second information transmitting unit 1202.
  • the third information receiving unit 1201 is configured to receive first radio frequency information of the handover area reported by the user equipment in the second base station cell.
  • the handover area is an area covered by a location where all user terminals of the first base station cell are switched from the second base station cell.
  • the user equipment served by the second base station cell is in the handover area, and the first radio frequency information measured by the user terminal at the location of the user is sent to the second base station before the handover to the first base station cell, where the first radio frequency information is the handover area.
  • Radio frequency information, the first radio frequency information is measured by a user terminal in the handover area, and the first radio frequency information can be mapped out geographical information of the handover area.
  • the second information sending unit 1202 is configured to send the first radio frequency information of the handover area to the first base station, so that the first base station indicates, according to the first radio frequency information of the handover area, that the user equipment is on the frequency of the second base station cell.
  • the cell or only the second base station cell performs signal strength and/or signal quality measurements.
  • the second base station sends the first radio frequency information of the handover area to the first base station through the X2, IUR, SI or IU interface.
  • the first radio frequency information of the handover area includes reference signal received power RSRP, and/or reference signal received quality RSRQ, and/or arrival angle AOA.
  • the second base station sends the first radio frequency information of the handover area to the first base station according to the preset time interval, so that the first base station instructs the user equipment to perform signal quality measurement according to the first radio frequency information of the handover area.
  • the operation of the first base station is specifically described in the foregoing first base station, and details are not described herein again.
  • signal strength and/or signal quality measurement a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station.
  • the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Responding to the first base station; the first base station transmitting a handover command to the user terminal; and the user terminal switching to the target base station cell.
  • the second base station provided by the embodiment of the present invention can be used to implement the method corresponding to the embodiment shown in FIG. 2.
  • An embodiment of the present invention provides a first base station and a second base station, where the first radio frequency information of the handover area is received by the first base station, and the second radio frequency information reported by the user equipment served by the first base station cell is received; Whether the second radio frequency information reported by the user terminal matches the first radio frequency information of the handover area; if yes, the user equipment that reports the second radio frequency information sends a measurement indication message to indicate that the user terminal is in the second base station cell
  • the cell at the frequency or the signal strength and/or signal quality of the second base station cell is measured, so that small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.
  • the embodiment of the present invention further provides a second base station, which includes: a detecting unit as shown in FIG.
  • a detecting unit 1301, configured to detect proximity of the user terminal
  • the detecting unit can detect that the transmit power of the uplink signal of the user terminal exceeds a preset power threshold, and can infer that the user terminal is close to the second base station.
  • the second base station device is provided with a receiver, so that the uplink receiving function can be supported, and the uplink message sent by the user terminal is detected, thereby detecting that the user terminal is close to the second base station.
  • the information notification unit 1302 is configured to notify the first base station of the proximity information, so that the first base station indicates that the user equipment performs signal strength and/or signal quality on a cell on a frequency of the second base station cell or only on a second base station cell. measuring.
  • the proximity information further includes a user identifier, or resource information of a frequency domain, and/or a time domain, and/or a code domain, and/or a spatial domain of the user terminal.
  • the second base station When the second base station detects the proximity of the user terminal, the second base station notifies the first base station of the information, and the proximity information includes the information about the user terminal that is close to the second base station and the second base station. According to the proximity information, the first base station instructs the user terminal that is close to the second base station to perform signal strength and/or signal quality measurement on the frequency of the second base station according to the proximity information. Or only signal strength and/or signal quality measurements are made to the second base station.
  • the second base station further includes: a fourth information receiving unit 1303, configured to receive a user of the first base station cell service sent by the first base station before the second base station detects the proximity of the user terminal.
  • the information notification unit further includes
  • the information acquisition sub-unit 1312 is configured to obtain resource information used by the user equipment whose uplink signal transmission power of the user equipment detected by the second base station exceeds a preset power threshold, where the resource information includes a PRB physical radio resource block index number and a time domain. At least one of information, a code sequence index number, and a space resource block index number.
  • the information notification sub-unit 1322 is configured to notify the first base station of the resource information, so that the first base station identifies the user terminal according to the resource information, and indicates the user terminal to the cell on the frequency of the second base station cell or Signal strength and/or signal quality measurements are only made for the second base station cell.
  • a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Respond to a first base station; the first base station sends a handover command to the user terminal; and the user terminal switches to the target base station cell.
  • the second base station provided by the embodiment of the present invention may be used to implement the method corresponding to the embodiment shown in FIG.
  • the embodiment of the present invention provides a second base station, by detecting the proximity of the user terminal and notifying the first base station of the proximity information, so that the first base station indicates the user terminal to the cell on the frequency of the second base station cell or only
  • the signal strength and/or signal quality measurement is performed on the second base station cell, so that small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.
  • the embodiment of the present invention further provides a first base station, as shown in FIG. 16, comprising: a fifth information receiving unit 1601, and an information broadcasting unit 1602.
  • the fifth information receiving unit 1601 is configured to receive first radio frequency information of the switching area.
  • the first information receiving unit 1601 is configured to receive the first radio frequency information of the handover area sent by the second base station, where the first radio frequency information of the handover area is reported by the user terminal served by the second base station cell to the second radio frequency information. Base station.
  • the first information receiving unit 1601 is further configured to receive the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the handover area is an area covered by a location where all user terminals of the first base station cell are handed over from the second base station cell.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user equipment in the handover area, and the first radio frequency information may map the geographic information of the handover area.
  • the information broadcast unit 1602 is configured to broadcast the first radio frequency information of the handover area in the system message, so that the user terminal is in the case that the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area
  • the cell at the frequency of the second base station cell or only the second The base station cell performs signal strength and/or signal quality measurements.
  • the first base station After receiving the first radio frequency information of the handover area, the first base station broadcasts the first radio frequency information in the system message, and the user equipment under the service of the first base station cell can receive the first radio frequency information.
  • the user terminal periodically measures the second radio frequency information of the area in which the user is located, so the second radio frequency information can map the geographic information of the location where the user terminal is located. If the user terminal detects that the second radio frequency information matches the first radio frequency information of the handover area, it can determine that the user terminal is close to the handover area, and then the user terminal can be started at the second base station. Signal strength and/or signal quality measurements are made at the frequency or signal strength and/or signal quality measurements are only made for the second base station.
  • the first base station further includes a message receiving and instructing unit 1603, configured to: when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area, Receiving a user notification message returned by the user terminal; and, according to the user notification message, instructing the user terminal to perform signal strength and/or signal quality measurement on a cell on a frequency of a second base station cell or only on a second base station cell.
  • a message receiving and instructing unit 1603 configured to: when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area, Receiving a user notification message returned by the user terminal; and, according to the user notification message, instructing the user terminal to perform signal strength and/or signal quality measurement on a cell on a frequency of a second base station cell or only on a second base station cell.
  • the second base station provided by the embodiment of the present invention may be used to implement the method corresponding to the embodiment shown in FIG.
  • the embodiment of the present invention further provides a user terminal, as shown in FIG. 18, including a user receiving unit 1801, a user detecting unit 1802, and a user measuring unit 1803.
  • the user receiving unit 1801 is configured to receive first radio frequency information of a handover area broadcast by the first base station.
  • the handover area is an area covered by a location where all user terminals of the first base station cell are switched from the second base station cell.
  • the first radio frequency information is the radio frequency information of the handover area, and the first radio frequency information is measured by the user terminal in the handover area, and it can be seen that the first radio frequency information can be mapped and switched. Geographic information of the area.
  • the first base station After receiving the first radio frequency information of the handover area, the first base station is in the first radio frequency information In the system message broadcast, the user terminal under the service of the first base station cell can receive the first radio frequency information.
  • the user detecting unit 1802 is configured to detect whether the first radio frequency information of the handover area matches the second radio frequency information acquired by the user terminal itself.
  • the user terminal periodically measures the second radio frequency information of the area in which the user is located, so the second radio frequency information can map the geographic information of the location of the user terminal.
  • the user terminal automatically detects whether the second radio frequency information matches the first radio frequency information of the handover area, thereby determining whether the user terminal is close to the handover area.
  • the user measurement unit 1803 is configured to perform signal strength and/or signal quality measurement on the cell on the frequency of the second base station cell or only on the second base station cell when the user detection unit detects the match.
  • the user terminal When the user terminal is in the idle state, if the user terminal detects that the second radio frequency information matches the first radio frequency information of the handover area, it can determine that the user terminal is close to the switching area, and then the device can be started.
  • the user terminal performs signal strength and/or signal quality measurements on the frequency of the second base station, or performs signal strength and/or signal quality measurements only on the second base station.
  • the user measurement unit 1803 When the user terminal is in the connected state, as shown in FIG. 19, the user measurement unit 1803 further includes a user sending subunit 1813 and a user measurement subunit 1823.
  • the user sending subunit 1813 is configured to send a user notification message to the first base station when the user detecting unit detects the matching, so that the first base station instructs the user terminal to perform signal quality measurement according to the user notification message.
  • the user measurement sub-unit 1823 is configured to perform signal quality measurement according to the indication of the first base station.
  • signal strength and/or signal quality measurement a target base station whose signal strength and/or signal quality exceeds a preset threshold value can be obtained, and the user terminal performing signal strength and/or signal quality measurement will measure the measurement result.
  • the report is sent to the first base station. If the measurement result satisfies the handover condition, the first base station sends a handover request to the target cell according to the measurement report, and the target base station determines to accept the user terminal according to the resource condition of the base station cell, and sends the handover. Respond to a first base station; the first base station sends a handover command to the user terminal; and the user terminal switches to the target base station cell.
  • the user equipment provided by the embodiment of the present invention may be used to implement the method corresponding to the embodiment shown in FIG. 5.
  • An embodiment of the present invention provides a first base station and a user terminal, where the first radio frequency information of the handover area between the first base station and the second base station is received by the first base station; and the first radio frequency information of the handover area is in the system. Broadcasting in the message, so that the user terminal performs the cell on the frequency of the second base station cell or only the second base station cell when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area Signal strength and/or signal quality measurement, which enables targeted small-scale search and measurement, improves search efficiency, and saves power.
  • the embodiment of the present invention further provides a cell discovery system, as shown in FIG. 20, including a first base station 2001 corresponding to the embodiment shown in FIG. 11 and a second base station 2002 corresponding to the embodiment shown in FIG.
  • the second base station 2002 receives the first radio frequency information of the handover area reported by the user equipment in the second base station cell, and sends the first radio frequency information of the handover area to the first base station 2001.
  • Another optional mode is: the first base station 2101 directly receives the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the first base station 2001 receives the second radio frequency information reported by the user equipment served by the first base station cell in addition to the first radio frequency information sent by the second base station 2002, and detects the second radio frequency information reported by the user equipment and the switching area.
  • the user terminal reporting the second radio frequency information sends a measurement indication message to indicate that the user equipment performs signal strength on the cell on the frequency of the second base station cell or only on the second base station cell. Or signal quality measurement. .
  • the second radio information reported by the user terminal matches the first radio frequency information of the handover area
  • the first radio frequency information of the handover area includes reference signal received power RSRP, and/or reference signal received quality RSRQ, and/or arrival angle AOA.
  • the embodiment of the present invention further provides a cell discovery system.
  • the first base station 2101 may be the first base station corresponding to the embodiment shown in FIG. 17, and the user terminal 2103 may be the user terminal corresponding to the embodiment shown in FIG.
  • the second base station 2102 receives the first radio frequency information of the handover area between the first base station 2101 and the second base station 2102 reported by the user equipment served by the second base station cell, and sends the radio frequency information to the first base station 2101.
  • Another optional manner is: the first base station 2101 directly receives the first radio frequency information of the handover area that is sent by the user equipment that is just switched by the second base station cell to the first base station cell.
  • the first base station 2101 After receiving the first radio frequency information of the handover area, the first base station 2101 broadcasts the first radio frequency information in the system message, and the user terminal served by the first base station 2101 can accept the message.
  • the user terminal 2103 detects whether the first radio frequency information of the received handover area matches the second radio frequency information acquired by itself; if the user terminal 2103 is in the connected state, the user terminal 2103 sends the first radio base station 2103 to the first base station 2101.
  • the user notification message is sent, so that the first base station 2101 instructs the user terminal 2103 to perform signal strength and/or signal quality measurement on the cell on the frequency of the second base station cell or only on the second base station cell according to the user notification message.
  • the user terminal 2103 When the user terminal 2103 is in the idle state, the user terminal 2103 can directly perform signal strength and/or signal quality measurement on the cell on the frequency of the second base station cell or only on the second base station cell.
  • the embodiments of the present invention are not limited thereto.
  • the user terminal 2013 detects the matching situation, there may be two implementation scenarios, one is: detecting whether the second radio frequency information is in the radio frequency interval value of the first radio frequency information; the other is: detecting Whether the difference between the second radio frequency information and the first radio frequency information is within a preset radio frequency threshold.
  • the system provided by the embodiment of the present invention where the first base station 2001 includes the first information receiving unit, the second information receiving unit, the detecting unit, and the first information sending unit mentioned above, and the second base station 2002 includes the foregoing.
  • the first base station 2101 mentioned includes the fifth information receiving unit, the information broadcasting unit mentioned above, and the user terminal 2103 includes the above-mentioned user receiving unit, user detecting unit, user measuring unit, and user thereof.
  • the measurement unit also includes a user transmission subunit and a user measurement subunit.
  • the first base station in Embodiment 5 of the present invention may be a macro base station
  • the second base station may be a small power base station or a macro base station.
  • the low-power base station includes but is not limited to a pico base station, an RRH (Remote Radio Head), an RRU (Radio Remote Unit), a Relay, a NB (NodeB, a base station node), and a BS. (Base Station Controller, base station), femto (home base station), LTE HIFI (high speed network), WIFI (wireless broadband), user equipment under D2D, etc.
  • the embodiment of the present invention further provides a cell discovery system, which receives the first radio frequency information of the handover area by the first base station, and receives the second radio frequency information reported by the user equipment served by the first base station cell, and then detects the reported by the user terminal. Whether the second radio frequency information matches the first radio frequency information of the handover area; if the second radio frequency information is matched, the user equipment that reports the second radio frequency information sends a measurement indication message to indicate that the user equipment is on the frequency of the second base station cell.
  • the cell or the second base station cell only performs signal strength and/or signal quality measurement, so that small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.
  • another cell discovery system receives the first radio frequency information of the handover area between the first base station and the second base station by the first base station; and the first radio frequency information of the handover area is in the system. Broadcasting in the message, so that the user terminal performs the cell on the frequency of the second base station cell or only the second base station cell when the second radio frequency information acquired by the user terminal itself matches the first radio frequency information of the handover area Signal strength and / or signal quality measurements. Therefore, small-scale search and measurement can be performed purposefully, the search efficiency is improved, and the power saving effect is achieved.

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Abstract

本发明实施例提供一种小区发现方法、设备及系统，涉及无线通信领域，可以有目地的进行小范围搜索测量，提高了搜索的效率，并起到省电的效果。其方法包括：第一基站在接收切换区域的第一射频信息并接收由第一基站小区服务的用户终端上报的第二射频信息后检测用户终端上报的第二射频信息是否与所述切换区域的第一射频信息相匹配，若匹配，向上报第二射频信息的用户终端发送测量指示消息，以指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区进行信号强度和/或信号质量测量。本发明实施例提供的方案用于小区的搜索发现。

Description

一种小区发现方法、 设备及系统 本申请要求于 2011 年 10 月 2 日提交中国专利局、 申请号为 201110294098.2、 发明名称为 "一种小区发现方法、 设备及系统" 的中国专 利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信系统， 尤其涉及一种小区发现方法、设备及系统。 发明背景
目前， 不同类型的网络之间的连接大多是异构网间的连接， 异构网内 部署有各种不同类型的基站， 为了提升无线通信系统的吞吐量， 减轻用户 终端服务小区的负载， 需要用户终端通过搜索测量来发现合适的相邻小区 进行小区切换。
现有技术中的小区发现方法， 是通过服务基站的指示， 用户终端启动 对其他基站小区的盲目的大量的搜索测量， 进而发现合适的相邻小区， 在 对发现的相邻小区进行信号测量后决定是否进行小区切换。
在实现上述小区发现的过程中， 发明人发现现有技术中用户终端要进 行盲目的大量搜索， 非常耗电。 发明内容
本发明的实施例提供一种小区发现方法、 设备及系统， 可以有目地的 进行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。
为达到上述目的， 本发明的实施例釆用如下技术方案：
一种小区发现方法， 包括：
第一基站接收切换区域的第一射频信息； 第一基站接收由第一基站小区服务的用户终端上报的第二射频信息； 检测所述用户终端上报的第二射频信息是否与所述切换区域的第一射 频信息相匹配；
若匹配， 则向上报所述第二射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区 进行信号强度和 /或信号质量测量。
一种小区发现方法， 包括：
第二基站接收第二基站小区内的用户终端上报的切换区域的第一射频 信息；
所述第二基站向第一基站发送所述切换区域的第一射频信息， 以使得 所述第一基站根据所述切换区域的第一射频信息， 指示用户终端对在第二 基站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质 量测量。
一种小区发现方法， 包括：
第二基站探测到用户终端的靠近；
所述第二基站将靠近信息通知给第一基站， 以使得所述第一基站指示 用户终端对在所述第二基站小区所在频率上的小区或只对所述第二基站小 区进行信号强度和 /或信号质量测量。
一种小区发现方法， 包括：
第一基站接收切换区域的第一射频信息；
第一基站将所述切换区域的第一射频信息在系统消息中广播， 以使得 用户终端在所述用户终端自身获取的第二射频信息与所述切换区域的第一 射频信息相匹配时对在第二基站小区所在频率上的小区或只对第二基站小 区进行信号强度和 /或信号质量测量。
一种小区发现方法， 包括：
用户终端接收第一基站广播的切换区域的第一射频信息； 检测所述切换区域的第一射频信息与所述用户终端自身获取的第二射 频信息是否相匹配；
如果相匹配， 则对在第二基站小区所在频率上的小区或只对第二基站 小区进行信号强度和 /或信号质量测量。
一种第一基站， 包括：
第一信息接收单元， 用于接收切换区域的第一射频信息；
第二信息接收单元， 用于接收由第一基站小区服务的用户终端上报的 第二射频信息；
检测单元， 用于检测用户终端上报的第二射频信息是否与所述切换区 域的第一射频信息相匹配；
第一信息发送单元， 用于所述检测单元检测到相匹配时， 向上 ^艮第二 射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小 区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量测 量。
一种第二基站， 包括：
第三信息接收单元， 用于接收所述第二基站小区内的用户终端上报的 切换区域的第一射频信息；
第二信息发送单元， 用于向第一基站发送所述切换区域的第一射频信 息， 以使得所述第一基站根据所述切换区域的第一射频信息， 指示用户终 端对在第二基站小区所在频率上的小区或只对第二基站小区进行信号强度 和 /或信号质量测量。
一种第二基站， 包括：
探测单元， 用于探测用户终端的靠近；
信息通知单元， 用于将靠近信息通知给第一基站， 以使得所述第一基 站指示所述用户终端对在第二基站小区所在频率上的小区或只对第二基站 小区进行信号强度和 /或信号质量测量。 一种第一基站， 包括：
第五信息接收单元， 用于接收切换区域的第一射频信息；
信息广播单元， 用于将所述切换区域的第一射频信息在系统消息中广 播， 以使得用户终端在所述用户终端自身获取的第二射频信息与所述切换 区域的第一射频信息相匹配时对在第二基站小区所在频率上的小区或只对 第二基站小区进行信号强度和 /或信号质量测量。
一种用户终端， 包括：
用户接收单元， 用于接收第一基站广播的切换区域的第一射频信息； 用户检测单元， 用于检测所述切换区域的第一射频信息与所述用户终 端自身获取的第二射频信息是否相匹配；
用户测量单元， 用于在所述用户检测单元检测到相匹配时， 对在第二 基站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质 量测量。
一种小区发现系统， 其特征在于， 包括：
如上所述的第一基站和第二基站； 和 /或
如上所述的第二基站； 和 /或
如上所述的第一基站和用户终端。
本发明实施例提供了一种小区发现方法、 设备及系统， 在接收切换区 域的第一射频信息并接收由第一基站小区服务的用户终端上报的第二射频 信息后检测用户终端上报的第二射频信息是否与所述切换区域的第一射频 信息相匹配， 若匹配， 向上报第二射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区 进行信号强度和 /或信号质量测量，从而可以有目地的进行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。 此外， 通过由第二基站探测到用 户终端的靠近并将靠近信息通知给第一基站， 以使得第一基站指示用户终 端对在第二基站小区所在频率上的小区或只对第二基站小区进行信号强度 和 /或信号质量测量， 从而也可以有目地的进行小范围搜索测量， 提高了搜 索的效率， 并起到省电的效果。 另外， 在由第一基站接收第一基站与第二 基站之间的切换区域的第一射频信息后， 将切换区域的第一射频信息在系 统消息中广播， 以使得用户终端在用户终端自身获取的第二射频信息与所 述切换区域的第一射频信息相匹配时对在第二基站小区所在频率上的小区 或只对第二基站小区进行信号强度和 /或信号质量测量， 从而可以有目地的 进行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。 附图简要说明
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的前提下， 还可以根据这些附图获得其他的附 图。
图 1为实施例 1提供的一种小区发现方法流程图；
图 2为实施例 1提供的一种小区发现方法流程图；
图 3为实施例 1提供的另一种小区发现方法流程图；
图 4为实施例 1提供的另一种小区发现方法流程图；
图 5为实施例 1提供的另一种小区发现方法流程图；
图 6为实施例 2提供的另一种小区发现方法流程图；
图 7为实施例提供的小区发现方法应用场景图；
图 8为实施例 3提供的一种小区发现方法流程图；
图 9为实施例 3提供的另一种小区发现方法流程图；
图 10为实施例 4提供的一种小区发现方法流程图；
图 11为实施例 5提供的一种第一基站结构框图；
图 12为实施例 5提供的一种第二基站结构框图； 图 13为实施 提供的另一种第二基站结构框图
图 14为实施 提供的另一种第二基站结构框图
图 15为实施 提供的另一种第二基站结构框图
图 16为实施 提供的另一种第一基站结构框图
图 17为实施 提供的另一种第一基站结构框图
图 18为实施 提供的一种用户终端结构框图；
图 19为实施 提供的另一种第一基站结构框图；
图 20为实施 提供的一种小区发现系统的示意图；
图 21为实施 提供的另一种小区发现系统的示意图 实施本发明的方式
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 有做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。
本发明提供的实施例 1~5中所述的切换区域指的是用户终端从第二基 站切换至第一基站的区域。 所述切换区域的第一射频信息中会携带有与所 述切换区域对应的第二基站的小区的频率信息或 /和所述第二基站的小区标 识。
在本发明提供的实施例 1~5中的测量到所述第二射频信息的用户终端 和最终进行信号强度和 /或信号质量测量的用户终端可以相同，也可以不同， 在此不作限定。
实施例 1 :
本发明实施例提供了一种小区发现方法， 该方法用于第一基站一侧， 如图 1所示， 该方法包括以下步骤： 101、 第一基站接收切换区域的第一射频信息。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出切换区 域的地理信息。
102、第一基站接收由第一基站小区服务的用户终端上报的第二射频信 息。
第一基站小区服务的用户终端会以预定时间间隔定时向为自己提供服 务的第一基站上报第二射频信息， 该第二射频信息由用户终端在自身所在 位置处测得， 故所述第二射频信息可以映射出用户终端所在位置的地理信 息。
103、检测用户终端上报的第二射频信息是否与所述切换区域的第一射 频信息相匹配。
第一射频信息可以映射出切换区域的地理信息， 第二射频信息可以映 射出用户终端所在位置的地理信息， 故检测用户终端上报的第二射频信息 是否与所述切换区域的第一射频信息相匹配， 即可判断出上报第二射频信 息的用户终端是否已靠近所述切换区域。
104、 若匹配， 则向上 第二射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区 进行信号强度和 /或信号质量测量。
若检测到用户终端上 "^的第二射频信息与所述切换区域的第一射频信 息相匹配， 即可判断出上报第二射频信息的用户终端已靠近所述切换区域， 此时， 第一基站就会向上报与所述切换区域的第一射频信息相匹配的第二 射频信息的用户终端发送测量指示消息， 该测量指示消息里面包含有所述 第二基站的小区的频率信息或 /和所述第二基站的小区标识， 可以指示用户 终端在所述第二基站的小区的频率上进行信号强度和 /或信号质量测量， 或 只对所述第二基站的小区进行信号强度和 /或信号质量测量。 通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例还提供的方法用于第二基站一侧， 则如图 2所示包括以 下步骤：
201、第二基站接收第二基站小区服务的用户终端上报的切换区域的第 一射频信息。
处于切换区域的由第二基站的小区服务的用户终端， 在向第一基站的 小区切换前会向第二基站发送用户终端在自身所在位置处测得的第一射频 信息， 所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处 于所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出切换 区域的地理信息。
202、 第二基站向第一基站发送切换区域的第一射频信息。
第二基站会通过 X2、 IUR、 Sl、 IU接口或无线空口 （如微波或宿主基 站和中继节点之间的接口） 向第一基站发送切换区域的第一射频信息， 以 使得第一基站根据所述切换区域的第一射频信息， 指示用户终端进行对在 第二基站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信 号质量测量， 其中第一基站的动作在该小区发现方法用于第一基站一侧处 已做具体描述， 在此不再赘述。
本发明实施例提供的一种小区发现方法通过由第一基站接收切换区域 的第一射频信息并接收由第一基站小区服务的用户终端上报的第二射频信 息； 然后检测用户终端上报的第二射频信息是否与所述切换区域的第一射 频信息相匹配； 若匹配， 则向上报第二射频信息的用户终端发送测量指示 消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基 站小区进行信号强度和 /或信号质量测量， 从而可以有目地的进行小范围搜 索测量， 提高了搜索的效率， 并起到省电的效果。
本发明实施例还提供了一种小区发现方法，该方法用于第二基站一侧， 如图 3所示， 该方法包括以下步骤：
301、 第二基站在探测到用户终端的靠近。
所述第二基站设备上设置有接收机， 故可支持上行接收功能， 对用户 终端发送的上行消息进行探测， 从而探测到用户终端靠近第二基站。
302、 第二基站将靠近信息通知给第一基站， 以使得第一基站指示用户 终端对在第二基站小区所在频率上的小区或只对第二基站小区进行信号强 度和 /或信号质量测量。
第二基站会通过 X2、 IUR、 Sl、 IU接口或无线空口 （如微波或宿主基 站和中继节点之间的接口）将靠近信息通知给第一基站。
第二基站探测到用户终端的靠近时， 会将此信息以靠近信息的方式通 知给第一基站， 该靠近信息中包括有所述靠近第二基站的用户终端的一些 信息和所述第二基站的小区的频率信息或 /和所述第二基站的小区标识， 第 一基站根据该靠近信息， 指示靠近第二基站的用户终端在所述第二基站的 频率上进行信号强度和 /或信号质量测量， 或只对所述第二基站进行信号强 度和 /或信号质量测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例还提供的一种小区发现方法通过由第二基站探测到用户 终端的靠近并将靠近信息通知给第一基站， 以使得第一基站指示用户终端 进行信号质量测量， 从而可以有目地的进行小范围搜索测量， 提高了搜索 的效率， 并起到省电的效果。
本发明实施例还提供了一种小区发现方法，该方法用于第一基站一侧， 如图 4所示， 该方法包括以下步骤：
401、 第一基站接收切换区域的第一射频信息。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出切换区 域的地理信息。
402、 第一基站将切换区域的第一射频信息在系统消息中广播， 以使得 用户终端在用户终端自身获取的第二射频信息与所述切换区域的第一射频 信息相匹配时对在第二基站小区所在频率上的小区或只对第二基站小区进 行信号强度和 /或信号质量测量。
第一基站在接收到切换区域的第一射频信息后把该第一射频信息在系 统消息中广播， 第一基站小区服务下的用户终端都可以接收到该第一射频 信息。 用户终端会定时的测量自己所在区域的第二射频信息， 故所述第二 射频信息可以映射出用户终端所在位置的地理信息。 若用户终端检测到所 述第二射频信息与所述切换区域的第一射频信息相匹配， 即可判断出用户 终端已靠近所述切换区域， 此时即可启动用户终端在所述第二基站小区的 频率上进行信号强度和 /或信号质量测量， 或只对所述第二基站小区进行信 号强度和 /或信号质量测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
该方法用于用户终端一侧， 则如图 5所示包括以下步骤：
501、 用户终端接收第一基站广播的切换区域的第一射频信息。
其中， 所述切换区域为从第二基站小区切换到第一基站小区的所有用 户终端所处的位置覆盖的区域。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 从其获得方式可以看出， 该第一射 频信息可以映射出切换区域的地理信息。
第一基站在接收到切换区域的第一射频信息后把该第一射频信息在系 统消息中广播， 第一基站小区服务下的用户终端都可以接收到该第一射频 信息。
502、检测所述切换区域的第一射频信息与用户终端自身获取的第二射 频信息是否相匹配。
用户终端会定时的测量自己所在区域的第二射频信息， 故所述第二射 频信息可以映射出用户终端所在位置的地理信息。 用户终端自行检测所述 第二射频信息是否与所述切换区域的第一射频信息相匹配， 从而判断出用 户终端是否已靠近所述切换区域。
503、如果相匹配， 则对在第二基站小区所在频率上的小区或只对第二 基站小区进行信号强度和 /或信号质量测量。
如果用户终端检测到所述第二射频信息与所述切换区域的第一射频信 息相匹配， 即可判断出用户终端已靠近所述切换区域， 此时用户终端即可 启动用户终端在所述第二基站的小区的频率上进行信号强度和 /或信号质量 测量， 或只对所述第二基站的小区进行信号强度和 /或信号质量测量。 通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例还提供的一种小区发现方法通过由第一基站接收第一基 站与第二基站之间的切换区域的第一射频信息； 并将切换区域的第一射频 信息在系统消息中广播， 以使得用户终端在用户终端自身获取的第二射频 信息与所述切换区域的第一射频信息相匹配时对在第二基站小区所在频率 上的小区或只对第二基站小区进行信号强度和 /或信号质量测量， 从而可以 有目地的进行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。
实际应用中， 本发明实施例 1 中的第一基站可以是宏基站， 第二基站 可以是小功率基站， 也可以是宏基站。 其中小功率基站包括但不限于 pico 基站， RRH ( Remote Radio Head, 无线信号收发器）， RRU ( Radio Remote Unit,射频拉远模块） ,Relay (中继)， NB ( NodeB,基站节点）， BS ( Base Station Controller, 基站）， femto(家庭基站）， LTE HIFI (高速网络）， WIFI (无线 宽带），D2D下的用户设备等。
实施例 2:
本发明实施例提供了一种小区发现方法， 如图 6所示， 该方法包括以 下步骤：
601、第二基站接收第二基站小区内的用户终端上报的切换区域的第一 射频信息。
所述切换区域的第一射频信息包括以下至少一项： RSRP ( reference signal received power, 参考信号接收功率 )、 RSRQ ( reference signal received quality, 参考信号接收质量）和 AOA ( angle of arrival, 到达角度）。
第二基站小区服务的用户终端处于切换区域， 该用户终端在向第一基 站小区切换前会向第二基站发送该用户终端在自身所在位置处测得的第一 射频信息， 所述第一射频信息为切换区域的射频信息， 该第一射频信息是 由处于所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出 切换区域的地理信息。 所述第二基站小区服务的用户终端将切换区域的第 一射频信息上报给第二基站。
602、 第二基站向第一基站发送切换区域的第一射频信息，
第二基站在接收到的第二基站小区内的用户终端上报的切换区域的第 一射频信息后将此信息发送给第一基站， 第一基站接收第二基站发送的切 换区域的第一射频信息。
601-602 所述的方法为第一基站接收第二基站发送的切换区域的第一 射频信息， 所述切换区域的第一射频信息由第二基站小区服务的用户终端 上报给第二基站。
可选的， 第一基站也可以接收刚由第二基站小区切换至第一基站小区 的用户终端发送的所述切换区域的第一射频信息。 当用户终端刚完成了从 第二基站小区切换至第一基站小区时， 用户终端的服务基站从第二基站变 成了第一基站， 此时， 第一基站立刻启动该用户终端测量自己所在区域的 第一射频信息， 所述用户终端将测得的切换区域的第一射频信息发送给第 一基站。
603、第一基站接收由第一基站 d、区服务的用户终端上报的第二射频信 息。
所述第二射频信息包括以下至少一项： RSRP、 RSRQ、 和 A0A。 第一基站小区服务的用户终端会定时的向自己的服务基站第一基站上 报第二射频信息， 该第二射频信息由用户终端在自身所在位置处测得， 故 所述第二射频信息可以映射出用户终端所在位置的地理信息。 604、检测用户终端上报的第二射频信息是否与所述切换区域的第一射 频信息相匹配。
第一射频信息可以映射出切换区域的地理信息， 第二射频信息可以映 射出用户终端所在位置的地理信息， 故检测用户终端上报的第二射频信息 是否与所述切换区域的第一射频信息相匹配， 即可判断出上报第二射频信 息的用户终端是否已靠近所述切换区域。
检测所述第二射频信息是否与第一射频信息相匹配有两种匹配方法： 一种方法是， 检测用户终端上报的第二射频信息是否处于所述切换区 域的第一射频信息的射频区间值内。 例如， 所述用户终端上报的第二射频 信息为 RSRP值，所述切换区域的第一射频信息为 RSRP值，则所述切换区 域的第一射频信息的射频区间值为 RSRP 的一个区间值， 故此匹配方法即 为检测所述用户终端上报的第二射频信息中的 RSRP值是否在所述第一射 频信息的 RSRP值形成的 RSRP的一个区间值内。
当然可选的所述用户终端上 的第二射频信息可以包括 RSRP值、 和 / 或 RSRQ值、 和 /或 AOA值。 故可检测所述用户终端上报的第二射频信息 中的 RSRP值、 和 /或 RSRQ值、 和 /或 AOA值是否在所述切换区域第一射 频信息的 RSRP值、 和 /或 RSRQ值、 和 /或 AOA值形成的 RSRP值、 和 /或 RSRQ值、和 /或 AOA值的区间值内。当射频信息中包含有 RSRP值、 RSRQ 值、 AOA值的任两种或三种都包括时， 可使检测是否匹配的方法更精确。
另一种方法是， 检测用户终端上报的第二射频信息与所述切换区域的 第一射频信息的差值是否处于预设射频门限值内。 例如， 所述用户终端上 才艮的第二射频信息为 RSRP值， 所述切换区域的第一射频信息为 RSRP值， 第一基站中设置有预设 RSRP 门限值， 此匹配方法即为检测所述用户终端 上报的第二射频信息中的 RSRP值与所述第一射频信息的 RSRP值的差值是 否在预设 RSRP门限值内。
当然可选的所述用户终端上 的第二射频信息可以包括 RSRP值、 和 / 或 RSRQ值、 和 /或 AOA值， 故可检测所述用户终端上报的第二射频信息 中的 RSRP值、和 /或 RSRQ值、和 /或 AOA值与所述第一射频信息的 RSRP 值、 和 /或 RSRQ值、 和 /或 AOA值的差值是否在预设 RSRP门限值内、 和 / 或预设 RSRQ门限值内、 和 /或预设 AOA门限值内。 当射频信息中包含有 RSRP值、 RSRQ值、 AOA值的任两种或三种都包括时， 可使检测是否匹 配的方法更精确。
605、 若匹配， 则向上报第二射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区 进行信号强度和 /或信号质量测量。
若检测到用户终端上 "^的第二射频信息与所述切换区域的第一射频信 息相匹配， 即可判断出上报第二射频信息的用户终端已靠近所述切换区域， 此时， 第一基站就会向上报与所述切换区域的第一射频信息相匹配的第二 射频信息的用户终端发送测量指示消息， 该测量指示消息里面包含有所述 第二基站的小区的频率信息或 /和所述第二基站的小区标识， 可以指示用户 终端在所述第二基站的小区的频率上进行信号强度和 /或信号质量测量， 或 只对所述第二基站的小区进行信号强度和 /或信号质量测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
实际应用中， 本发明实施例 2中的第一基站可以是宏基站， 第二基站 可以是小功率基站， 也可以是宏基站。 其中小功率基站包括但不限于 pico 基站， RRH ( Remote Radio Head, 无线信号收发器）， RRU ( Radio Remote Unit,射频拉远模块） ,Relay (中继)， NB ( NodeB,基站节点）， BS ( Base Station Controller, 基站）， femto(家庭基站）， LTE HIFI (高速网络）， WIFI (无线 宽带），D2D下的用户设备等。
下面将运用本实施例步骤 601 606所描述的方法举例说明， 如图 7所 示， 在本实施例应用场景中， 有宏基站 1、 宏基站 2和宏基站 3 , 这三个宏 基站所覆盖的小区为宏小区 1、 宏小区 2、 宏小区 3。 在宏小区 3中含有若 干小功率基站如 pico基站 1、 pico基站 2、 pico基站 3。 宏小区 3服务下有 若干用户终端， 如用户终端 1、 用户终端 2、 用户终端 3、 用户终端 4等。
首先， pico基站 1、 pico基站 2、 pico基站 3会按照预设时间间隔定 时向宏基站 1、 宏基站 2和宏基站 3发送 pico小区 1、 pico小区 2、 pico小 区 3的切换区域的第一射频信息， 该第一射频信息中包含有所属 pico小区 1、 pico小区 2、 pico小区 3的切换区域的 RSRP区间值和 AOA区间值， 宏 基站 1、 2、 3在接收到 pico小区 1、 2、 3的切换区域的第一射频信息后会 将此信息存储起来，。
可选的， 宏基站 1、 2、 3也可以接收刚由 pico小区切换至宏小区的用 户终端发送的所述切换区域的第一射频信息， 宏小区 3中的用户终端 3刚 由 pico小区 1切换至宏小区 3 , 则宏小区 3立刻启动用户终端 3测量自己 所在位置的第一射频信息， 用户终端 3将该第一射频信息上报给宏基站 3 , 宏基站 3接收此信息并存储此信息。
宏小区 3服务下的用户终端 1、 2、 3、 4会按照预设的时间间隔定时向 自己的服务基站宏基站 3发送第二射频信息，该第二射频信息由用户终端 1、
2、 3、 4在自身所在位置处测得， 该第二射频信息中包含有用户终端 1、 2、
3、 4在自身所在位置处的 RSRP值， 和 AOA值。
宏基站 3将检测接收到的第二射频信息中的 RSRP值和 AOA值是否处 于第一射频信息中的 RSRP区间值和 AOA区间值内，通过检测可发现用户 终端 2上^艮的第二射频信息中的 RSRP值 14W和 AOA值 48度处于 pico 小区 1切换区域的第一射频信息中的 RSRP区间值 10W~20W和 AOA区间 值 45度〜 60度内， 则宏基站 3判断出用户终端 2已靠近 pico小区 1 , 则宏 基站 3可指示用户终端 2对 pico小区 1进行信号质量测量。
若用户终端 2向宏基站 3发送的测量报告显示出测得的信号质量超过 设定预设门限值， 则宏基站 3回想 pico基站 1发送切换请求， pico基站 1 根据本基站小区的资源情况确定接纳该用户终 2, 则 pico基站 1发送切换 响应给宏基站 3 , 宏基站 3向用户终端 2发送切换命令； 用户终端 2切换到 pico小区 1。
本发明实施例提供的一种小区发现方法通过由第一基站接收切换区域 的第一射频信息并接收由第一基站小区服务的用户终端上报的第二射频信 息； 然后检测用户终端上报的第二射频信息是否与所述切换区域的第一射 频信息相匹配； 若匹配， 则向上报第二射频信息的用户终端发送测量指示 消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第二基 站小区进行信号强度和 /或信号质量测量， 从而可以有目地的进行小范围搜 索测量， 提高了搜索的效率， 并起到省电的效果。
实施例 3:
本发明实施例还提供了一种小区发现方法， 如图 8所示， 该方法包括 以下步骤：
801、第二基站接收第一基站发送的第一基站 d、区服务的用户终端的上 行资源信息。
其中， 所述上行资源信息包括 C-RNTI(Cell Radio Network Temporary Identifier,小区无线网络临时标识）、 PCI (Physical Cell Identifier, 物理小区 标识）、 SRS ( Sounding Reference Symbol, 探测参考符号）等。
所述第二基站上设置有可接收第一基站小区服务的用户终端的上行发 送信号的接收机， 故可支持上行接收功能， 可以通过 X2 口、 S1 口、 私有 接口或者空口接收到第一基站发送的第一基站小区服务的用户终端的上行 资源信息。
802、 第二基站根据所述上行资源信息探测到对应的用户终端。
第二基站根据所述上行资源信息进行探测， 如果探测到对应的用户终 端， 则可根据上行资源信息将对应用户终端发送的上行信号解析出来。
803、第二基站探测到所述对应用户终端的上行信号的发射功率超过预 设功率门限， 则推断出用户终端靠近第二基站。
所述第二基站上设置有接收机， 故可支持上行接收功能， 可以对用户 终端发送的上行信号进行探测， 若第二基站探测到所述对应用户终端的上
804、 第二基站将靠近信息通知给第一基站， 以使得第一基站指示用户 终端进行信号质量测量。
所述靠近信息包括用户标识， 在靠近信息中会带有所述第二基站的 d、 区的频率信息或 /和所述第二基站的小区标识， 第一基站根据用户标识可以 识别出靠近第二基站的用户终端， 并指示可以指示用户终端在所述第二基 站的小区的频率上进行信号强度和 /或信号质量测量， 或只对所述第二基站 的小区进行信号强度和 /或信号质量测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例还提供了一种小区发现方法， 如图 9所示， 该方法包括 以下步骤：
901、第二基站探测到用户终端的上行信号的发射功率超过预设功率门 限， 则推断出用户终端靠近第二基站。
所述第二基站上设置有可接收第一基站小区服务的用户终端的上行发 送信号的接收机， 故可支持上行接收功能， 可以对用户终端发送的上行消 息进行探测， 若第二基站探测到用户终端的上行信号的发射功率超过预设 功率门限则可推断出用户终端靠近第二基站。
902、 获取第二基站探测到的靠近第二基站的用户终端使用的资源信 息。
第二基站在对用户终端发送的上行信号进行探测， 在探测到用户终端 的上行信号的发射功率超过预设功率门限时， 也可以识别出所述用户终端 使用的资源信息， 所述资源信息为频域、 和 /或时域、 和 /或码域、 和 /或空间 域的资源信息。
所述频域、 和 /或时域、 和 /或码域、 和 /或空间域的资源信息包括 PRB 物理无线资源块索引号、 和 /或时域信息、 和 /或码序列索引号、 和 /或空间资 源块索引号。
903、 第二基站将靠近信息通知给第一基站， 以使得第一基站指示用户 终端进行信号质量测量。
第二基站探测到用户终端的靠近时， 会将此信息以靠近信息的方式通 知给第一基站， 该靠近信息中包括有用户终端使用的资源信息， 在所述靠 近信息中会带有所述第二基站的小区的频率信息或 /和所述第二基站的小区 标识， 第一基站根据该靠近信息中的用户标识或用户终端使用的资源信息 可以识别出靠近第二基站的用户终端， 并指示其在所述第二基站的小区的 频率上进行信号强度和 /或信号质量测量， 或只对所述第二基站的小区进行 信号强度和 /或信号质量测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
实际应用中， 本发明实施例 3中的第一基站可以是宏基站， 第二基站 可以是小功率基站， 也可以是宏基站。 其中小功率基站包括但不限于 pico 基站， RRH ( Remote Radio Head, 无线信号收发器）， RRU ( Radio Remote Unit,射频拉远模块） ,Relay (中继)， NB ( NodeB,基站节点）， BS ( Base Station Controller, 基站）， femto(家庭基站）， LTE HIFI (高速网络）， WIFI (无线 宽带），D2D下的用户设备等。
下面将运用本实施例步骤 801 804、 901-903所描述的方法举例说明， 如图 7所示， 在本实施例应用场景中， 有宏基站 1、 宏基站 2和宏基站 3 , 这三个宏基站所覆盖的小区为宏小区 1、 宏小区 2、 宏小区 3。 在宏小区 3 中含有若干小功率基站如 pico基站 1、 pico基站 2、 pico基站 3。 宏小区 3 服务下的用户终端有用户终端 1、 用户终端 2、 用户终端 3、 用户终端 4等。
pico基站 1、 2、 3上设置有接收机， 可支持上行接收功能， 宏基站 3 通过 X2 口、 S1 口、 私有接口或者空口向 pico基站 1、 2、 3发送宏小区 3 服务下的用户终端 1、 2、 3、 4 的上行资源信息， 所述上行资源信息包括 C-RNTI ( Cell Radio Network Temporary Identifier,小区无线网络临时标识）、 PCI ( Physical Cell Identifier , 物理小区标识）、 SRS(Sounding Reference Symbol, 探测参考符号)等。 pico基站 1、 2、 3根据所述上行资源信息在 空口进行探测， 可以探测到用户终端 1、 2、 3、 4 , 并从对应用户终端的上 行资源信息中解析出用户终端 1、 2、 3、 4的用户标识 UEID1、 UEID2、 UEID3、 UEID4 , pico基站 1、 2、 3在探测到对应的用户终端后， 对用户终端发送的 上行信息进行探测， 其中 pico基站 1可以探测到用户终端 2的上行信号的 发射功率为 30W超过预设功率门限 20W, 则可推断出用户终端 2靠近 pico 小区 1 , pico基站 1将用户终端 2的用户标识 UEID2发送给宏基站 3 , 则 宏基站 3根据收到的用户标识 UEID2指示用户终端 2对 pico小区 1进行信 号质量测量。
可选的， pico基站也可以不接收宏基站发送的上行资源信息， pico基 站 1在探测到用户终端 2的上行信号的发射功率超过预设功率门限时， 也 可以探测到用户终端 2使用的资源信息。 所述资源信息包括 PRB物理无线 资源块索引号、 时域信息、 码序列索引号和空间资源块索引号中的至少一 项。
pico基站 1将用户终端 2的用户标识 UEID2或用户终端 2的频域、和 /或时域、 和 /或码域、 和 /或空间域的资源信息发送给宏基站 3 , 则宏基站 3 根据收到的用户标识 UEID2指示用户终端 2对 pico小区 1进行信号质量测 量， 或由于用户终端 2在服务小区宏小区 3的资源信息是由服务宏基站配 置的， 故宏基站 3可根据用户终端 2的频域、 和 /或时域、 和 /或码域、 和 / 或空间域的资源信息， 识别出用户终端 2, 并指示用户终端 2对 pico小区 1 进行信号质量测量。
若用户终端 2向宏基站 3发送的测量报告显示出测得的信号质量超过 设定预设门限值， 则宏基站 3回想 pico基站 1发送切换请求， pico基站 1 根据本基站小区的资源情况确定接纳该用户终 2, 则 pico基站 1发送切换 响应给宏基站 3 , 宏基站 3向用户终端 2发送切换命令； 用户终端 2切换到 pico小区 1。
本发明实施例还提供的一种小区发现方法通过由第二基站探测到用户 终端的靠近并将靠近信息通知给第一基站， 以使得第一基站指示用户终端 进行信号质量测量， 从而可以有目地的进行小范围搜索测量， 提高了搜索 的效率， 并起到省电的效果。
实施例 4:
本发明实施例还提供了一种小区发现方法， 如图 10所示， 该方法包括 以下步骤：
1001、 第二基站接收第二基站小区内的用户终端上报的切换区域的第 一射频信息。
所述切换区域的第一射频信息包括参考信号接收功率 RSRP、 和 /或参 考信号接收质量 RSRQ、 和 /或到达角度 AOA。
第二基站小区服务的用户终端处于切换区域， 该用户终端在向第一基 站小区切换前会向第二基站发送该用户终端在自身所在位置处测得的第一 射频信息， 所述第一射频信息为切换区域的射频信息， 该第一射频信息是 由处于所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出 切换区域的地理信息。 所述第二基站小区服务的用户终端将切换区域的第 一射频信息上报给第二基站。
1002, 第二基站向第一基站发送切换区域的第一射频信息，
第二基站在接收到的第二基站小区内的用户终端上报的切换区域的第 一射频信息后将此信息发送给第一基站， 第一基站接收第二基站发送的切 换区域的第一射频信息。
1001-1002 所述的方法为第一基站接收第二基站发送的切换区域的第 一射频信息， 所述切换区域的第一射频信息由第二基站小区服务的用户终 端上报给第二基站。
可选的， 第一基站也可以接收刚由第二基站小区切换至第一基站小区 的用户终端发送的所述切换区域的第一射频信息。 当用户终端刚完成了从 第二基站小区切换至第一基站小区时， 用户终端的服务基站从第二基站变 成了第一基站， 此时， 第一基站立刻启动该用户终端测量自己所在区域的 第一射频信息， 所述用户终端将测得的切换区域的第一射频信息发送给第 一基站。
1003、 第一基站将切换区域的第一射频信息在系统消息中广播。
第一基站在接收到切换区域的第一射频信息后把该第一射频信息在系 统消息中广播， 第一基站小区服务下的用户终端都可以接收到该第一射频 信息。
1004、 用户终端检测所述切换区域的第一射频信息与用户终端自身获 取的第二射频信息是否相匹配。
所述第二射频信息包括参考信号接收功率 RSRP、 和 /或参考信号接收 质量 RSRQ、 和 /或到达角度 AOA。
用户终端会定时的测量自己所在区域的第二射频信息， 故所述第二射 频信息可以映射出用户终端所在位置的地理信息。 用户终端自行检测所述 第二射频信息是否与所述切换区域的第一射频信息相匹配， 从而判断出用 户终端是否已靠近所述切换区域。
检测所述第二射频信息是否与第一射频信息相匹配有两种匹配方法： 一种方法是， 检测用户终端上报的第二射频信息是否处于所述切换区 域的第一射频信息的射频区间值内。 例如， 所述用户终端上报的第二射频 信息为 RSRP值，所述切换区域的第一射频信息为 RSRP值，则所述切换区 域的第一射频信息的射频区间值为 RSRP 的一个区间值， 故此匹配方法即 为检测所述用户终端上报的第二射频信息中的 RSRP值是否在所述第一射 频信息的 RSRP值形成的 RSRP的一个区间值内。
当然可选的所述用户终端上 的第二射频信息可以包括 RSRP值、 和 / 或 RSRQ值、 和 /或 AOA值。 故可检测所述用户终端上报的第二射频信息 中的 RSRP值、 和 /或 RSRQ值、 和 /或 AOA值是否在所述切换区域第一射 频信息的 RSRP值、 和 /或 RSRQ值、 和 /或 AOA值形成的 RSRP值、 和 /或 RSRQ值、和 /或 AOA值的区间值内。当射频信息中包含有 RSRP值、 RSRQ 值、 AOA值的任两种或三种都包括时， 可使检测是否匹配的方法更精确。
另一种方法是， 检测用户终端上报的第二射频信息与所述切换区域的 第一射频信息的差值是否处于预设射频门限值内。 例如， 所述用户终端上 才艮的第二射频信息为 RSRP值， 所述切换区域的第一射频信息为 RSRP值， 第一基站中设置有预设 RSRP 门限值， 此匹配方法即为检测所述用户终端 上报的第二射频信息中的 RSRP值与所述第一射频信息的 RSRP值的差值是 否在预设 RSRP门限值内。
当然可选的所述用户终端上 的第二射频信息可以包括 RSRP值、 和 / 或 RSRQ值、 和 /或 AOA值， 故可检测所述用户终端上报的第二射频信息 中的 RSRP值、和 /或 RSRQ值、和 /或 AOA值与所述第一射频信息的 RSRP 值、 和 /或 RSRQ值、 和 /或 AOA值的差值是否在预设 RSRP门限值内、 和 / 或预设 RSRQ门限值内、 和 /或预设 AOA门限值内。 当射频信息中包含有 RSRP值、 RSRQ值、 AOA值的任两种或三种都包括时， 可使检测是否匹 配的方法更精确。
1005、 如果相匹配， 则对在第二基站小区所在频率上的小区或只对第 二基站小区进行信号强度和 /或信号质量测量。
如果用户终端检测到所述第二射频信息与所述切换区域的第一射频信 息相匹配， 即可判断出用户终端已靠近所述切换区域。
此时， 若用户终端处于空闲态， 则用户终端自行启动对对在第二基站 小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量测 量。
若用户终端若处于连接态，则用户终端向第一基站发送用户通知消息， 第一基站根据接收到的用户通知消息， 指示用户终端进行信号质量测量。
实际应用中， 本发明实施例 4中的第一基站可以是宏基站， 第二基站 可以是小功率基站， 也可以是宏基站。 其中小功率基站包括但不限于 pico 基站， RRH ( Remote Radio Head, 无线信号收发器）， RRU ( Radio Remote Unit,射频拉远模块） ,Relay (中继)， NB ( NodeB,基站节点）， BS ( Base Station Controller, 基站）， femto(家庭基站）， LTE HIFI (高速网络）， WIFI (无线 宽带），D2D下的用户设备等。
下面将运用本实施例步骤 1001 1005所描述的方法举例说明。 如图 7所示， 在本实施例应用场景中， 有宏基站 1、 宏基站 2和宏基 站 3 , 这三个宏基站所覆盖的小区为宏小区 1、 宏小区 2、 宏小区 3。 在宏 小区 3中含有若干小功率基站如 pico基站 1、 pico基站 2、 pico基站 3。 宏 小区 3服务下有若干用户终端， 如用户终端 1、 用户终端 2、 用户终端 3、 用户终端 4等。
首先， pico基站 1、 pico基站 2、 pico基站 3会按照预设时间间隔定 时向宏基站 1、 宏基站 2和宏基站 3发送 pico小区 1、 pico小区 2、 pico小 区 3的切换区域的第一射频信息， 该第一射频信息中包含有所述 pico小区 1、 pico小区 2、 pico小区 3的切换区域的 RSRP区间值和 AOA区间值， 宏 基站 1、 2、 3在接收到 pico小区 1、 2、 3的切换区域的第一射频信息后会 将此信息存储起来。
可选的， 宏基站 1、 2、 3也可以接收刚由 pico小区切换至宏小区的用 户终端发送的所述切换区域的第一射频信息， 宏小区 3中的用户终端 3刚 由 pico小区 1切换至宏小区 3 , 则宏小区 3立刻启动用户终端 3测量自己 所在位置的第一射频信息， 用户终端 3将该第一射频信息上报给宏基站 3 , 宏基站 3接收此信息并存储此信息。
宏基站 1、 2、 3将第一射频信息在系统消息中广播， 则宏基站 1、 2、 3服务下的所有用户终端都将接收到此第一射频信息，如宏基站 3服务下的 用户终端 1、 2、 3、 4 都将接收到此第一射频信息， 用户终端 1、 2、 3、 4 会按照预设的时间定时的测量自己所在区域的第二射频信息， 该第二射频 信息由用户终端 1、 2、 3、 4在自身所在位置处测得， 该第二射频信息中包 含有用户终端 1、 2、 3、 4在自身所在位置处的 RSRP值和 A0A值。
用户终端 1、 2、 3、 4将检测自己测得的第二射频信息中的 RSRP值和 AOA值是否处于第一射频信息中的 RSRP区间值和 AOA区间值内。 其中， 用户终端 2通过检测发现自己测得的的第二射频信息中的 RSRP值 14W和 AOA值 48度处于 pico小区 1切换区域的第一射频信息中的 RSRP区间值 10W-20W和 AOA区间值 45度〜 60度内，则用户终端 2判断出自己已靠近 pico小区 1。
若用户终端 2处于空闲态， 则用户终端 2自行启动对 pico小区 1进行 信号质量测量。
若用户终端 2处于连接态， 则用户终端 2向宏基站 3发送用户通知消 息， 宏基站 3根据接收到的用户通知消息， 指示用户终端 2对 pico小区 1 进行信号质量测量。
本发明实施例还提供的一种小区发现方法通过由第一基站接收第一基 站与第二基站之间的切换区域的第一射频信息； 并将切换区域的第一射频 信息在系统消息中广播， 以使得用户终端在用户终端自身获取的第二射频 信息与所述切换区域的第一射频信息相匹配时进行信号质量测量， 从而可 以有目地的进行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。
实施例 5:
本发明是实施例提供了一种第一基站， 如图 11所示， 包括： 第一信息 接收单元 1101、 第二信息接收单元 1102、 检测单元 1103、 第一信息发送 单元 1104。
第一信息接收单元 1101 , 用于接收切换区域的第一射频信息。
具体来说， 所述第一信息接收单元 1101 , 用于接收第二基站发送的切 换区域的第一射频信息， 所述切换区域的第一射频信息由第二基站小区服 务的用户终端上报给第二基站。
可选的， 所述第一信息接收单元 1101 , 还可以用于接收刚由第二基站 小区切换至第一基站小区的用户终端发送的所述切换区域的第一射频信 息。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出切换区 域的地理信息。 第二信息接收单元 1102, 用于接收由第一基站小区服务的用户终端上 报的第二射频信息。
第一基站小区服务的用户终端会以预定时间间隔定时向为自己提供服 务的第一基站上报第二射频信息， 该第二射频信息由用户终端在自身所在 位置处测得， 故所述第二射频信息可以映射出用户终端所在位置的地理信 息。
检测单元 1103 , 用于检测用户终端上报的第二射频信息是否与所述切 换区域的第一射频信息相匹配。
第一射频信息可以映射出切换区域的地理信息， 第二射频信息可以映 射出用户终端所在位置的地理信息， 故检测用户终端上报的第二射频信息 是否与所述切换区域的第一射频信息相匹配， 即可判断出上报第二射频信 息的用户终端是否已靠近所述切换区域。
检测是否匹配的方法具体来说可以是检测用户终端上报的第二射频信 息是否处于所述切换区域的第一射频信息的射频区间值内， 或检测用户终 端上报的第二射频信息与所述切换区域的第一射频信息的差值是否处于预 设射频门限值内。
第一信息发送单元 1104 , 用于所述检测单元检测到相匹配时， 向上报 第二射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基 站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量 测量。
若检测到用户终端上 "^的第二射频信息与所述切换区域的第一射频信 息相匹配， 即可判断出上报第二射频信息的用户终端已靠近所述切换区域， 此时， 第一基站就会向上报与所述切换区域的第一射频信息相匹配的第二 射频信息的用户终端发送测量指示消息， 该测量指示消息里面包含有所述 第二基站的小区的频率信息或 /和所述第二基站的小区标识， 可以指示用户 终端在所述第二基站的小区的频率上进行信号强度和 /或信号质量测量， 或 只对所述第二基站的小区进行信号强度和 /或信号质量测量。
所述切换区域的第一射频信息和用户终端上 "^的第二射频信息包括参 考信号接收功率 RSRP、 和 /或参考信号接收质量 RSRQ、 和 /或到达角度 AOA。
本实施例提供的第一基站可以用于实现图 1所示实施例对应的方法。 本发明是实施例还提供了一种第二基站， 如图 12所示包括， 第三信息 接收单元 1201、 第二信息发送单元 1202。
第三信息接收单元 1201 , 用于接收第二基站小区内的用户终端上报的 切换区域的第一射频信息。
其中， 所述切换区域为从第二基站小区切换到第一基站小区的所有用 户终端所处的位置覆盖的区域。 第二基站小区服务的用户终端处于切换区 域， 在向第一基站小区切换前会向第二基站发送用户终端在自身所在位置 处测得的第一射频信息， 所述第一射频信息为切换区域的射频信息， 该第 一射频信息是由处于所述切换区域的用户终端测量得知的， 该第一射频信 息可以映射出切换区域的地理信息
第二信息发送单元 1202, 用于向第一基站发送切换区域的第一射频信 息， 以使得第一基站根据所述切换区域的第一射频信息， 指示用户终端对 在第二基站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或 信号质量测量。
第二基站会通过 X2、 IUR、 SI或 IU接口向第一基站发送切换区域的 第一射频信息。 所述切换区域的第一射频信息包括参考信号接收功率 RSRP、 和 /或参考信号接收质量 RSRQ、 和 /或到达角度 AOA。
第二基站会按照预设时间间隔定时向第一基站发送切换区域的第一射 频信息， 以使得第一基站根据所述切换区域的第一射频信息， 指示用户终 端进行信号质量测量。 其中第一基站的动作在上述第一基站处已做具体描 述， 在此不再赘述。 通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例提供的第二基站可以用于实现图 2所示实施例对应的方 法。
本发明实施例提供了一种第一基站和第二基站， 通过过由第一基站接 收切换区域的第一射频信息并接收由第一基站小区服务的用户终端上报的 第二射频信息； 然后检测用户终端上报的第二射频信息是否与所述切换区 域的第一射频信息相匹配； 若匹配， 则向上报第二射频信息的用户终端发 送测量指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或 只对第二基站小区进行信号强度和 /或信号质量测量， 从而可以有目地的进 行小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。
本发明是实施例还提供了一种第二基站， 如图 13所示包括： 探测单元
1301、 信息通知单元 1302。
探测单元 1301 , 用于探测用户终端的靠近；
所述探测单元可探测到用户终端的上行信号的发射功率超过预设功率 门限， 即可推断用户终端靠近第二基站。
所述第二基站设备上设置有接收机， 故可支持上行接收功能， 对用户 终端发送的上行消息进行探测， 从而探测到用户终端靠近第二基站。
信息通知单元 1302, 用于将靠近信息通知给第一基站， 以使得第一基 站指示用户终端对在第二基站小区所在频率上的小区或只对第二基站小区 进行信号强度和 /或信号质量测量。 所述靠近信息， 还包括， 用户标识， 或用户终端的频域、 和 /或时域、 和 /或码域、 和 /或空间域的资源信息。
第二基站探测到用户终端的靠近时， 会将此信息以靠近信息的方式通 知给第一基站， 该靠近信息中包括有所述靠近第二基站的用户终端的一些 信息和所述第二基站的小区的频率信息或 /和所述第二基站的小区标识， 第 一基站根据该靠近信息， 指示靠近第二基站的用户终端在第二基站的频率 上进行信号强度和 /或信号质量测量， 或只对所述第二基站进行信号强度和 / 或信号质量测量。
进一步的， 如图 14 所示， 所述第二基站还包括， 第四信息接收单元 1303 , 用于在第二基站探测用户终端的靠近前， 接收第一基站发送的第一 基站小区服务的用户终端的上行资源信息， 并根据所述上行资源信息探测 到对应的用户终端。
进一步的， 如图 15所示， 所述信息通知单元， 还包括，
信息获取子单元 1312 , 用于获取第二基站检测到的用户终端的上行信 号发射功率超过预设功率门限的用户终端使用的资源信息； 所述资源信息 包括 PRB物理无线资源块索引号、 时域信息、 码序列索引号、 空间资源块 索引号中的至少一个。
信息通知子单元 1322 , 用于将所述资源信息通知给第一基站， 以使得 第一基站根据所述资源信息识别出用户终端， 并指示用户终端对在第二基 站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量 测量。
通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例提供的第二基站可以用于实现图 3所示实施例对应的方 法。
本发明实施例提供了一种第二基站， 通过探测到用户终端的靠近并将 靠近信息通知给第一基站， 以使得第一基站指示用户终端对在第二基站小 区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量测 量， 从而可以有目地的进行小范围搜索测量， 提高了搜索的效率， 并起到 省电的效果。
本发明是实施例还提供了一种第一基站， 如图 16所示， 包括： 第五信 息接收单元 1601 , 信息广播单元 1602。
第五信息接收单元 1601 , 用于接收切换区域的第一射频信息。
具体来说，所述第一信息接收单元 1601用于接收第二基站发送的切换 区域的第一射频信息， 所述切换区域的第一射频信息由第二基站小区服务 的用户终端上报给第二基站。
可选的， 所述第一信息接收单元 1601 , 还可以用于接收刚由第二基站 小区切换至第一基站小区的用户终端发送的所述切换区域的第一射频信 息。
上述切换区域为从第二基站小区切换到第一基站小区的所有用户终端 所处的位置覆盖的区域。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 该第一射频信息可以映射出切换区 域的地理信息。
信息广播单元 1602, 用于将切换区域的第一射频信息在系统消息中广 播， 以使得用户终端在用户终端自身获取的第二射频信息与所述切换区域 的第一射频信息相匹配时对在第二基站小区所在频率上的小区或只对第二 基站小区进行信号强度和 /或信号质量测量。
第一基站在接收到切换区域的第一射频信息后把该第一射频信息在系 统消息中广播， 第一基站小区服务下的用户终端都可以接收到该第一射频 信息。 用户终端会定时的测量自己所在区域的第二射频信息， 故所述第二 射频信息可以映射出用户终端所在位置的地理信息。 若用户终端检测到所 述第二射频信息与所述切换区域的第一射频信息相匹配， 即可判断出用户 终端已靠近所述切换区域， 此时即可启动用户终端在所述第二基站的频率 上进行信号强度和 /或信号质量测量， 或只对所述第二基站进行信号强度和 / 或信号质量测量。
进一步的， 如图 17 所示， 所述第一基站还包括消息接收与指示单元 1603 , 用于在所述用户终端自身获取的第二射频信息与所述切换区域的第 一射频信息相匹配时， 接收用户终端返回的用户通知消息； 并根据所述用 户通知消息， 指示用户终端对在第二基站小区所在频率上的小区或只对第 二基站小区进行信号强度和 /或信号质量测量。
本发明实施例提供的第二基站可以用于实现图 4所示实施例对应的方 法。
本发明实施例还提供了一种用户终端， 如图 18所示， 包括用户接收单 元 1801、 用户检测单元 1802、 用户测量单元 1803。
用户接收单元 1801 , 用于接收第一基站广播的切换区域的第一射频信 息。
其中， 所述切换区域为从第二基站小区切换到第一基站小区的所有用 户终端所处的位置覆盖的区域。
所述第一射频信息为切换区域的射频信息， 该第一射频信息是由处于 所述切换区域的用户终端测量得知的， 从其获得方式可以看出， 该第一射 频信息可以映射出切换区域的地理信息。
第一基站在接收到切换区域的第一射频信息后把该第一射频信息在系 统消息中广播， 第一基站小区服务下的用户终端都可以接收到该第一射频 信息。
用户检测单元 1802, 用于检测所述切换区域的第一射频信息与用户终 端自身获取的第二射频信息是否相匹配。
用户终端会定时的测量自己所在区域的第二射频信息， 故所述第二射 频信息可以映射出用户终端所在位置的地理信息。 用户终端自行检测所述 第二射频信息是否与所述切换区域的第一射频信息相匹配， 从而判断出用 户终端是否已靠近所述切换区域。
用户测量单元 1803 , 用于在所述用户检测单元检测到相匹配时， 对在 第二基站小区所在频率上的小区或只对第二基站小区进行信号强度和 /或信 号质量测量。
当用户终端处于空闲态时， 如果用户终端检测到所述第二射频信息与 所述切换区域的第一射频信息相匹配， 即可判断出用户终端已靠近所述切 换区域， 此时即可启动用户终端在所述第二基站的频率上进行信号强度和 / 或信号质量测量， 或只对所述第二基站进行信号强度和 /或信号质量测量。
当用户终端处于连接态时， 如图 19所示， 所述用户测量单元 1803 , 还包括用户发送子单元 1813、 用户测量子单元 1823。
用户发送子单元 1813 , 用于在所述用户检测单元检测到相匹配时， 向 第一基站发送用户通知消息， 以使得第一基站根据所述用户通知消息， 指 示用户终端进行信号质量测量。
用户测量子单元 1823 , 用于根据第一基站的指示进行信号质量测量。 通过信号强度和 /或信号质量测量，可以得到信号强度和 /或信号质量超 过设定预设门限值的目标基站， 进行信号强度和 /或信号质量测量的用户终 端会将该测量结果以测量报告的形式上报给第一基站， 如果测量结果满足 切换的条件， 第一基站会根据此测量报告向目标小区发送切换请求， 目标 基站根据本基站小区的资源情况确定接纳该用户终端， 并发送切换响应给 第一基站； 第一基站向用户终端发送切换命令； 用户终端切换到目标基站 小区。
本发明实施例提供的用户设备可以用于实现图 5所示实施例对应的方 法。
本发明实施例提供了一种第一基站和用户终端， 通过由第一基站接收 第一基站与第二基站之间的切换区域的第一射频信息； 并将切换区域的第 一射频信息在系统消息中广播， 以使得用户终端在用户终端自身获取的第 二射频信息与所述切换区域的第一射频信息相匹配时对在第二基站小区所 在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量测量， 从 而可以有目地的进行小范围搜索测量， 提高了搜索的效率， 并起到省电的 效果。
本发明实施例还提供了一种小区发现系统， 如图 20 所示， 包括如图 11所示实施例对应的第一基站 2001和如图 12所示实施例对应的第二基站 2002。
第二基站 2002接收第二基站小区内的用户终端上报的切换区域的第 一射频信息， 并向第一基站 2001发送该切换区域的第一射频信息。 另一种 可选的方式为： 第一基站 2101直接接收刚由第二基站小区切换至第一基站 小区的用户终端发送的切换区域的第一射频信息。
第一基站 2001除了接收第二基站 2002发送的第一射频信息， 还接收 由第一基站小区服务的用户终端上报的第二射频信息； 在检测用户终端上 报的第二射频信息与所述切换区域的第一射频信息相匹配时， 向上报第二 射频信息的用户终端发送测量指示消息， 以指示用户终端对在第二基站小 区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质量测 量。。
在检测用户终端上报的第二射频信息是否与所述切换区域的第一射频 信息相匹配时， 可以有两种实现场景， 一种是： 检测用户终端上报的第二 射频信息是否处于所述切换区域的第一射频信息的射频区间值内； 另一种 是： 检测用户终端上报的第二射频信息与所述切换区域的第一射频信息的 差值是否处于预设射频门限值内。
其中， 切换区域的第一射频信息包括参考信号接收功率 RSRP、 和 /或 参考信号接收质量 RSRQ、 和 /或到达角度 AOA。
另一方面， 本发明实施例还提供了一种小区发现系统， 具体的， 如图 21所示， 第一基站 2101、 第二基站 2102、 用户终端 2103。 其中第一基站 2101可以是如图 17所示实施例对应的第一基站， 用户终端 2103可以是如 图 19所示实施例对应的用户终端。
第二基站 2102 接收第二基站小区服务的用户终端上报的第一基站 2101与第二基站 2102之间的切换区域的第一射频信息，并将该射频信息发 送给第一基站 2101。 另一种可选的方式为： 第一基站 2101直接接收刚由第 二基站小区切换至第一基站小区的用户终端发送的切换区域的第一射频信 息。
第一基站 2101接收切换区域的第一射频信息后，将该第一射频信息在 系统消息中广播， 第一基站 2101服务下的用户终端均可接受此消息。 用户 终端 2103接收后， 检测接收到的切换区域的第一射频信息与自身获取的第 二射频信息是否相匹配； 若相匹配， 当用户终端 2103处于连接态时， 用户 终端 2103向第一基站 2101发送用户通知消息， 以使得第一基站 2101根据 所述用户通知消息， 指示用户终端 2103对在第二基站小区所在频率上的小 区或只对第二基站小区进行信号强度和 /或信号质量测量。 当用户终端 2103 处于空闲态时， 用户终端 2103可以直接对在第二基站小区所在频率上的小 区或只对第二基站小区进行信号强度和 /或信号质量测量。 本发明实施例并 不对此进行限制。
在用户终端 2013检测匹配情况时， 可以有两种实现场景， 一种是： 检 测第二射频信息是否处于第一射频信息的射频区间值内； 另一种是： 检测 第二射频信息与第一射频信息的差值是否处于预设射频门限值内。
本发明实施例提供的系统，其中的第一基站 2001中包括上文提及的第 一信息接收单元、 第二信息接收单元、 检测单元、 第一信息发送单元， 第 二基站 2002中包括上文提及的第三信息接收单元、 第二信息发送单元。 此 外， 提及的第一基站 2101中包括上文提及的第五信息接收单元、 信息广播 单元， 用户终端 2103中包括上文提及的用户接收单元、 用户检测单元、 用 户测量单元， 其用户测量单元还包括用户发送子单元和用户测量子单元。
实际应用中， 本发明实施例 5中的第一基站可以是宏基站， 第二基站 可以是小功率基站， 也可以是宏基站。 其中小功率基站包括但不限于 pico 基站， RRH ( Remote Radio Head, 无线信号收发器）， RRU ( Radio Remote Unit,射频拉远模块） ,Relay (中继)， NB ( NodeB,基站节点）， BS ( Base Station Controller, 基站）， femto(家庭基站）， LTE HIFI (高速网络）， WIFI (无线 宽带），D2D下的用户设备等。
本发明实施例还提供的一种小区发现系统， 通过由第一基站接收切换 区域的第一射频信息并接收由第一基站小区服务的用户终端上报的第二射 频信息； 然后检测用户终端上报的第二射频信息是否与所述切换区域的第 一射频信息相匹配； 若匹配， 则向上报第二射频信息的用户终端发送测量 指示消息， 以指示用户终端对在第二基站小区所在频率上的小区或只对第 二基站小区进行信号强度和 /或信号质量测量， 从而可以有目地的进行小范 围搜索测量， 提高了搜索的效率， 并起到省电的效果。 另外， 本发明实施 例提供的另一种小区发现系统， 通过由第一基站接收第一基站与第二基站 之间的切换区域的第一射频信息； 并将切换区域的第一射频信息在系统消 息中广播， 以使得用户终端在用户终端自身获取的第二射频信息与所述切 换区域的第一射频信息相匹配时对在第二基站小区所在频率上的小区或只 对第二基站小区进行信号强度和 /或信号质量测量。 从而可以有目地的进行 小范围搜索测量， 提高了搜索的效率， 并起到省电的效果。 本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机 可读取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序 代码的介质。
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 的保护范围应以所述权利要求的保护范围为准。

Claims

权利要求
1、 一种小区发现方法， 其特征在于， 包括：
第一基站接收切换区域的第一射频信息；
所述第一基站接收由所述第一基站小区服务的用户终端上报的 第二射频信息；
检测用户终端上报的所述第二射频信息是否与所述切换区域的 第一射频信息相匹配；
若匹配，则向上报所述第二射频信息的用户终端发送测量指示消 息，以指示用户终端对在第二基站小区所在频率上的小区或只对第二 基站小区进行信号强度和 /或信号质量测量。
2、 根据权利要求 1所述的方法， 其特征在于，
所述检测所述用户终端上报的所述第二射频信息是否与所述切 换区域的第一射频信息相匹配， 包括：
检测所述用户终端上报的所述第二射频信息是否处于所述切换 区域的第一射频信息的射频区间值内， 或
检测所述用户终端上报的所述第二射频信息与所述切换区域的 第一射频信息的差值是否处于预设射频门限值内。
3、 根据权利要求 2所述的方法， 其特征在于， 所述切换区域的 第一射频信息和用户终端上报的第二射频信息包括以下至少一项：参 考信号接收功率 RSRP、 参考信号接收质量 RSRQ和到达角度 AOA。
4、 根据权利要求 1~3任一项所述的方法， 其特征在于， 所述第 一基站接收切换区域的第一射频信息， 包括：
所述第一基站接收第二基站发送的切换区域的第一射频信息，所 述切换区域的第一射频信息由第二基站小区服务的用户终端上报给 第二基站。
5、 根据权利要求 1~3任一项所述的方法， 其特征在于， 所述第 一基站接收切换区域的第一射频信息， 包括：
所述第一基站接收由第二基站小区切换至第一基站小区且仍处 于切换区域的的用户终端发送的所述切换区域的第一射频信息。
6、 一种小区发现方法， 其特征在于， 包括：
第二基站接收所述第二基站小区内的用户终端上报的切换区域 的第一射频信息； 所述第二基站向第一基站发送所述切换区域的第一射频信息，以 使得第一基站根据所述切换区域的第一射频信息，指示用户终端对在 第二基站小区所在频率上的小区或只对第二基站小区进行信号强度 和 /或信号质量测量。
7、 根据权利要求 6所述的方法， 其特征在于， 所述切换区域的 第一射频信息包括以下任一项： 参考信号接收功率 RSRP、 参考信号 接收质量 RSRQ和到达角度 AOA。
8、 一种小区发现方法， 其特征在于， 包括：
第二基站探测到用户终端的靠近；
所述第二基站将靠近信息通知给第一基站，以使得所述第一基站 指示所述用户终端对在所述第二基站小区所在频率上的小区或只对 所述第二基站小区进行信号强度和 /或信号质量测量。
9、 根据权利要求 8所述的方法， 其特征在于， 所述靠近信息， 包括：
用户标识； 或者，
用户终端的频域、 和 /或时域、 和 /或码域、 和 /或空间域的资源信 息。
10、 根据权利要求 8或 9所述的方法， 其特征在于， 所述第二基 站检测到用户终端的靠近， 包括：
所述第二基站探测到用户终端的上行信号的发射功率超过预设 功率门限。
11、 根据权利要求 10所述的方法， 其特征在于， 在所述第二基 站探测到用户终端的靠近前， 还包括：
所述第二基站接收第一基站发送的所述第一基站小区服务的用 户终端的上行资源信息，并根据所述上行资源信 ,包、探测到对应的用户 终端。
12、 根据权利要求 8或 9所述的方法， 其特征在于， 所述第二基 站将靠近信息通知给第一基站，以使得所述第一基站指示所述用户终 端对在所述第二基站小区所在频率上的小区或只对所述第二基站小 区进行信号强度和 /或信号质量测量， 包括：
获取所述第二基站探测到的用户终端中上行信号发射功率超过 预设功率门限的用户终端使用的资源信息； 将所资源信息发送给第一基站，以使得所述第一基站根据所述资 源信息获取用户终端，并指示用户终端进行对在所述第二基站小区所 在频率上的小区或只对所述第二基站小区进行信号强度和 /或信号质 量测量。
13、 根据权利要求 12所述的方法， 其特征在于， 所述资源信息 包括以下至少一项： PRB 物理无线资源块索引号、 时域信息、 码序 列索引号和空间资源块索引号。
14、 一种小区发现方法， 其特征在于， 包括：
第一基站接收切换区域的第一射频信息；
所述第一基站将所述切换区域的第一射频信息在系统消息中广 播，以使得用户终端在用户终端自身获取的第二射频信息与所述切换 区域的第一射频信息相匹配时对在第二基站小区所在频率上的小区 或只对第二基站小区进行信号强度和 /或信号质量测量。
15、 根据权利要求 14所述的方法， 其特征在于， 还包括： 所述第一基站接收用户终端在所述切换区域第一射频信息与用 户终端自身获取的第二射频信息相匹配时返回的用户通知消息；根据 所述用户通知消息，所述第一基站指示用户终端进行对在第二基站小 区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质 量测量。
16、 根据权利要求 14~15任一项所述的方法， 其特征在于， 所述 第一基站接收切换区域的第一射频信息， 包括：
所述第一基站接收第二基站发送的切换区域的第一射频信息，所 述切换区域的第一射频信息由所述第二基站小区服务的用户终端上 报给所述第二基站。
17、 根据权利要求 14~15任一项所述的方法， 其特征在于， 所述 第一基站接收切换区域的第一射频信息， 包括：
所述第一基站接收由第二基站小区切换至所述第一基站小区且 仍处于所述切换区域的用户终端发送的切换区域的第一射频信息。
18、 一种小区发现方法， 其特征在于， 包括：
用户终端接收第一基站广播的切换区域的第一射频信息； 所述用户终端检测所述切换区域的第一射频信息与所述用户终 端自身获取的第二射频信息是否相匹配； 如果相匹配，则所述用户终端对在第二基站小区所在频率上的小 区或只对第二基站小区进行信号强度和 /或信号质量测量。
19、 根据权利要求 18所述的方法， 其特征在于，
所述用户终端自身获取的第二射频信息与所述切换区域的第一 射频信息相匹配， 包括：
所述用户终端自身获取的的第二射频信息处于所述切换区域的 第一射频信息的射频区间值内， 或
所述用户终端自身获取的第二射频信息与所述切换区域的第一 射频信息的差值处于预设射频门限值内。
20、 根据权利要求 19所述的方法， 其特征在于， 所述如果相匹 配，则对在第二基站小区所在频率上的小区或只对第二基站小区进行 信号强度和 /或信号质量测量， 还包括：
如果相匹配， 则所述用户终端向所述第一基站发送用户通知消 息， 以使得所述第一基站根据所述用户通知消息， 指示所述用户终端 对在第二基站小区所在频率上的小区或只对第二基站小区进行信号 强度和 /或信号质量测量。
21、 一种第一基站， 其特征在于， 包括：
第一信息接收单元， 用于接收切换区域的第一射频信息；
第二信息接收单元， 用于接收由所述第一基站小区服务的用户终 端上报的第二射频信息；
检测单元，用于检测所述用户终端上报的第二射频信息是否与所 述切换区域的第一射频信息相匹配；
第一信息发送单元， 用于所述检测单元检测到相匹配时， 向上报 第二射频信息的用户终端发送测量指示消息，以指示用户终端对在第 二基站小区所在频率上的小区或只对第二基站小区进行信号强度和 / 或信号质量测量。
22、 根据权利要求 21所述的第一基站， 其特征在于， 所述检测 单元，还用于检测所述用户终端上报的第二射频信息是否处于所述切 换区域的第一射频信息的射频区间值内， 或
检测所述用户终端上报的第二射频信息与所述切换区域的第一 射频信息的差值是否处于预设射频门限值内。
23、 根据权利要求 22所述的第一基站， 其特征在于， 所述切换 区域的第一射频信息和所述用户终端上报的第二射频信息包括以下 至少一项： 参考信号接收功率 RSRP、 参考信号接收质量 RSRQ和到 达角度 AOA。
24、 根据权利要求 21~23任一项所述的第一基站， 其特征在于， 所述第一信息接收单元， 还用于接收第二基站发送的切换区域的第一 射频信息，所述切换区域的第一射频信息由所述第二基站小区服务的 用户终端上报给所述第二基站。
25、 根据权利要求 21~23任一项所述的第一基站， 其特征在于， 所述第一信息接收单元， 还用于接收由第二基站小区切换至第一基站 小区且仍处于所述切换区域的的用户终端发送的所述切换区域的第 一射频信息。
26、 一种第二基站， 其特征在于， 包括：
第三信息接收单元，用于接收所述第二基站小区内的用户终端上 报的切换区域的第一射频信息；
第二信息发送单元，用于向第一基站发送所述切换区域的第一射 频信息， 以使得所述第一基站根据所述切换区域的第一射频信息， 指 示用户终端对在所述第二基站小区所在频率上的小区或只对所述第 二基站小区进行信号强度和 /或信号质量测量。
27、 根据权利要求 26 所述的第二基站， 其特征在于， 所述切换 区域的第一射频信息包括以下至少一项： 参考信号接收功率 RSRP、 参考信号接收质量 RSRQ和到达角度 AOA。
28、 一种第二基站， 其特征在于， 包括：
探测单元， 用于探测用户终端的靠近；
信息通知单元， 用于将靠近信息通知给第一基站， 以使得所述第 一基站指示用户终端对在所述第二基站小区所在频率上的小区或只 对所述第二基站小区进行信号强度和 /或信号质量测量。
29、 根据权利要求 28所述的第二基站， 其特征在于， 所述靠近 信息， 包括， 用户标识， 或者
用户终端使用的资源信息。
30、 根据权利要求 28或 29所述的第二基站， 其特征在于， 所述 探测单元，还用于探测到用户终端的上行信号的发射功率超过预设功 率门限。
31、 根据权利要求 30 所述的第二基站， 其特征在于， 所述第二 基站， 还包括：
第四信息接收单元，用于在所述第二基站探测到用户终端的靠近 前，接收所述第一基站发送的所述第一基站小区服务的用户终端的上 行资源信息， 并根据所述上行资源信 , 探测到对应的用户终端。
32、 根据权利要求 28或 29所述的第二基站， 其特征在于， 所述 信息通知单元， 还包括：
信息获取子单元，用于获取第二基站检测到的用户终端的上行信 号发射功率超过预设功率门限的用户终端使用的资源信息。
信息通知子单元， 用于将所述资源信息通知给第一基站， 以使得 所述第一基站根据所述资源信息获取用户终端，并指示用户终端对在 所述第二基站小区所在频率上的小区或只对所述第二基站小区进行 信号强度和 /或信号质量测量。
33、 根据权利要求 32 所述的第二基站， 其特征在于， 所述资源 信息包括以下至少一项： PRB 物理无线资源块索引号、 时域信息、 码序列索引号和空间资源块索引号。
34、 一种第一基站， 其特征在于， 包括：
第五信息接收单元， 用于接收切换区域的第一射频信息；
信息广播单元，用于将所述切换区域的第一射频信息在系统消,包、 中广播，以使得用户终端在所述用户终端自身获取的第二射频信息与 所述切换区域的第一射频信息相匹配时对在第二基站小区所在频率 上的小区或只对第二基站小区进行信号强度和 /或信号质量测量。
35、 根据权利要求 34 所述的第一基站， 其特征在于， 所述还包 括：
消息接收与指示单元，用于在所述用户终端自身获取的第二射频 信息与所述切换区域的第一射频信息相匹配时，接收所述用户终端返 回的用户通知消息； 并根据所述用户通知消息， 指示所述用户终端对 在第二基站小区所在频率上的小区或只对第二基站小区进行信号强 度和 /或信号质量测量。
36、 根据权利要求 34~36任一项所述的第一基站， 其特征在于， 所述第一信息接收单元， 用于接收第二基站发送的切换区域的第一射 频信息，所述切换区域的第一射频信息由所述第二基站小区服务的用 户终端上报给所述第二基站。
37、 根据权利要求 34~36任一项所述的第一基站， 其特征在于， 所述第一信息接收单元， 用于接收由第二基站小区切换至所述第一基 站小区且仍处于所述切换区域的的用户终端发送的所述切换区域的 第一射频信息。
38、 一种用户终端， 其特征在于， 包括：
用户接收单元，用于接收第一基站广播的切换区域的第一射频信 息；
用户检测单元，用于检测所述切换区域的第一射频信息与用户终 端自身获取的第二射频信息是否相匹配；
用户测量单元， 用于在所述用户检测单元检测到相匹配时， 对在 第二基站小区所在频率上的小区或只对第二基站小区进行信号强度 和 /或信号质量测量。
39、 根据权利要求 38 所述的用户终端， 其特征在于， 所述用户 检测单元，用于检测所述用户终端自身获取的的第二射频信息处于所 述切换区域的第一射频信息的射频区间值内， 或
检测用户终端自身获取的第二射频信息与所述切换区域的第一 射频信息的差值处于预设射频门限值内。
40、 根据权利要求 39所述的用户终端， 其特征在于， 所述用户 测量单元， 还包括：
用户发送子单元， 用于在所述用户检测单元检测到相匹配时， 向 所述第一基站发送用户通知消息，以使得所述第一基站根据所述用户 通知消息， 指示所述用户终端进行信号质量测量；
用户测量子单元，用于根据所述第一基站的指示对在第二基站小 区所在频率上的小区或只对第二基站小区进行信号强度和 /或信号质 量测量。
41、 一种小区发现系统， 其特征在于， 包括：
如权利要求 20~25所述的第一基站和 26~27所述的第二基站；和
/或
如权利要求 28~33所述的第二基站； 和 /或
如 34~38所述的第一基站和 39~40所述的用户终端。
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US20140235246A1 (en) 2014-08-21
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KR101606099B1 (ko) 2016-03-24
JP6198012B2 (ja) 2017-09-20

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