WO2014032453A1 - Handover method for user equipment, base station, user equipment, and handover system - Google Patents

Handover method for user equipment, base station, user equipment, and handover system Download PDF

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Publication number
WO2014032453A1
WO2014032453A1 PCT/CN2013/077296 CN2013077296W WO2014032453A1 WO 2014032453 A1 WO2014032453 A1 WO 2014032453A1 CN 2013077296 W CN2013077296 W CN 2013077296W WO 2014032453 A1 WO2014032453 A1 WO 2014032453A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
base station
message
carrier
handover
Prior art date
Application number
PCT/CN2013/077296
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French (fr)
Chinese (zh)
Inventor
郭锐
龚磊
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.)
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Publication date
Priority to CN201210307653.5A priority Critical patent/CN103634865B/en
Priority to CN201210307653.5 priority
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2014032453A1 publication Critical patent/WO2014032453A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/20Performing reselection for specific purposes for optimising the interference level
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks

Abstract

Disclosed are a handover method for a user equipment, a base station, the user equipment, and a handover system, allowing for real-time handover of a user equipment having limited uplink signal power to ensure normal communication for the user equipment. The specific solution is such that: when the base station learns the presence of an adjacent channel interference, the base station transmits a first downlink message to the user equipment within the coverage of the base station, where the first downlink message is used for instructing the user equipment within the coverage of the base station to reduce transmission power; the base station receives a signal transmitted by a first user equipment after the transmission power is reduced on the basis of the first downlink message; the base station determines a second user equipment on the basis of known user equipment within the coverage of the base station and of the first user equipment, where the second user equipment refers to a user equipment that is within the coverage of the base station and is limited in uplink signal power; and the base station hands over the second user equipment. Embodiments of the present invention are applicable in the technical field of communications.

Description

 The invention relates to a handover method of a user equipment, a base station, a user equipment and a handover system. The application is filed on August 27, 2012, and the application number is 201210307653.5. The invention name is "a handover method of a user equipment, a base station. The priority of the Chinese Patent Application, the User Equipment and the Switching System, the entire contents of which are incorporated herein by reference. The present invention relates to the field of communications technologies, and in particular, to a handover method of a user equipment, a base station, a user equipment, and a handover system.

BACKGROUND OF THE INVENTION Currently, spectrum usage is fixedly allocated. The TV service uses hundreds of megabits of transmission characteristics below 800 MHz and covers a dominant spectrum, but there are a large number of underutilized frequency bands in this spectrum. In order to better improve the spectrum utilization rate, the existing mobile communication system utilizes cognitive radio technology to perceive the wireless communication environment, dynamically detect and effectively access the idle radio frequency band, such as accessing a blank frequency band allocated to the television service. .

 However, when accessing the white space of the TV service, when the TV signal appears in the adjacent frequency, the Federal Communications Commission (FCC) stipulates that the transmission power of the base station can remain unchanged, but the maximum transmission power of the user equipment. It needs to be reduced from 20dBm to 16dBm, so that the base station cannot receive the uplink message sent by some user equipments.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a handover method of a user equipment, a base station, a user equipment, and a handover system, which can perform timely handover of a user equipment with limited uplink signal power to ensure normal communication of the user equipment. In order to achieve the above objective, the embodiment of the present invention adopts the following technical solutions: In a first aspect, an embodiment of the present invention provides a user equipment handover method, where the method includes: after a base station learns that there is a situation of adjacent frequency interference, to the base station The user equipment in the coverage area sends a first downlink message, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power;

 Receiving, by the base station, a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is according to the first A user equipment that communicates normally after the downlink message is reduced in power;

 Determining, by the base station, the second user equipment according to the user equipment and the first user equipment in the coverage area, where the second user equipment refers to the user equipment that sends the signal that is not received by the base station, That is, the user equipment with limited uplink signal power in the coverage of the base station; the base station switches the second user equipment.

 In a first possible implementation manner, after the base station learns that there is a situation of adjacent frequency interference, according to the first aspect, the method further includes:

 Sending, by the base station, a frequency point application message to a spectrum management entity or a database;

 Receiving, by the base station, a feedback result sent by the spectrum management entity or a database;

 Determining, by the base station, whether there is an available frequency point according to the feedback result;

 If the base station determines that there is an available frequency point according to the feedback result, the base station switches to any of the available frequency points, and simultaneously switches all user equipments to the same frequency point;

 If the base station determines that there is no available frequency point according to the feedback result, the first downlink message is sent to the user equipment, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power. .

 In a second possible implementation manner, after the base station learns that there is a situation of adjacent frequency interference, in combination with the first aspect or the first possible implementation manner, the method further includes:

 Determining, by the base station, whether a carrier is available for handover;

If the base station determines that there is a carrier available for handover, the base station switches to any of the available Carrier, and simultaneously switch all user equipments to the same carrier;

 And if the base station determines that there is no available carrier to perform handover, sending a first downlink message to the user equipment, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power.

 In a third possible implementation manner, in combination with the first aspect, the first possible implementation manner, or the second possible implementation manner, the performing, by the base station, the switching, by the second user equipment, specifically includes:

 Before the second user equipment enters the radio link failure state, the base station sends a second downlink message to the second user equipment, where the radio link failure status refers to that the user equipment fails to communicate with the base station. a status, the second downlink message is used to indicate that the second user equipment increases the sending power;

 Sending, by the base station, a handover measurement message to the second user equipment, so that the second user equipment performs measurement on a neighboring cell;

 Receiving, by the second user equipment, a measurement report that is sent by the second user equipment to measure the neighboring cell, and determining, according to the measurement report, the target cell that the second user equipment performs handover;

 Sending, by the base station, a handover request message to the target cell, requesting the second user equipment to switch to the target cell;

 Receiving, by the base station, a handover request feedback message of the target cell;

 The base station sends a handover command to the second user equipment, so that the second user equipment establishes a connection with the target cell.

 In a fourth possible implementation manner, the base station performs the second user equipment according to the first aspect, the first possible implementation manner, or the second possible implementation manner, or the third possible implementation manner. The switch specifically includes:

Before the second user equipment enters the radio link failure state, the base station sends a second downlink message to the second user equipment, where the second downlink message is used to indicate that the second user equipment is increased. Transmitting power Sending, by the base station, a handover measurement message to the second user equipment, so that the second user equipment performs measurement on the carrier;

 Receiving, by the base station, a feedback message sent by the second user equipment after measuring the carrier;

 Determining, by the base station, a target message that is performed by the second user equipment to perform handover according to the feedback message sent by the second user equipment after measuring the carrier;

 The base station sends a carrier switching message to the second user equipment, where the carrier switching message carries target carrier information, so that the second user equipment switches to the target carrier.

 In a second aspect, an embodiment of the present invention provides a user equipment switching method, where the method includes: the user equipment receives a first downlink message sent by the base station, where the first downlink message is used to indicate the base station The user equipment within the coverage reduces the transmission power;

 The user equipment is configured according to the first downlink message, and reduces the sending power of the user equipment;

 The user equipment sends a signal to the base station, where the signal carries the identifier of the user equipment, so that the base station receives a signal that is sent by the first user equipment after the power is reduced according to the first downlink message, The signal carries the identifier of the first user equipment, where the first user equipment is a user equipment that is normal after the power is reduced according to the first downlink message; and the base station is based on the known coverage area. The user equipment and the first user equipment determine the second user equipment, where the second user equipment refers to the user equipment that sends the signal that is not received by the base station, that is, the uplink signal power is limited in the coverage of the base station. User equipment;

 The second user equipment performs handover.

 In a first possible implementation, in combination with the second aspect, the switching, by the second user equipment, specifically includes:

 Receiving, by the second user equipment, a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to perform measurement on a neighboring cell;

The second user equipment performs measurement on the neighboring cell; The second user equipment sends a measurement report to the base station to measure the neighboring cell, so that the base station determines, according to the measurement report, the target cell that the second user equipment performs handover;

 Receiving, by the second user equipment, a handover command sent by the base station;

 And the second user equipment establishes a connection with the target cell according to the handover command. In a second possible implementation manner, in combination with the second aspect or the first possible implementation manner, the performing, by the

 The second user equipment receives a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station;

 The second user equipment measures the carrier, and sends a feedback message to the base station to measure the carrier of the base station, so that the base station determines, according to the feedback message, that the second user equipment performs the handover target. Carrier wave

 Receiving, by the second user equipment, a carrier switching message sent by the base station, where the carrier switching message carries target carrier information;

 The second user equipment switches to the target carrier according to the carrier switching message.

 In a third possible implementation manner, in combination with the second aspect or the first possible implementation manner or the second possible implementation manner, the method further includes:

 If the user equipment is determined by the base station as the second user equipment, the second user equipment performs handover before the second user equipment enters a radio link failure state.

 In a third aspect, an embodiment of the present invention provides a base station, where the base station includes: a sending unit, a receiving unit, a first determining unit, and a switching unit;

 The sending unit is configured to send, by the base station, a first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used to indicate the location The user equipment reduces the transmission power;

The receiving unit is configured to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first The user equipment is a user equipment that is in normal communication after the power is reduced according to the first downlink message. The first determining unit is configured to determine, according to the known coverage of the base station, the user equipment and the first user equipment. a user equipment, where the second user equipment is a user equipment that sends the signal that is not received by the base station, that is, a user equipment whose uplink signal power is limited in the coverage of the base station;

 The switching unit is configured to switch the second user equipment determined by the first determining unit.

 In a first possible implementation, in combination with the third aspect, the sending unit is further configured to: after the base station learns that there is an adjacent channel interference, send a frequency application message to the spectrum management entity or the database;

 The receiving unit is further configured to receive a feedback result sent by the spectrum management entity or a database;

 The base station further includes a determining unit, configured to determine, according to the feedback result, whether an available frequency point is available;

 The sending unit is configured to: if the determining unit determines that there is no available frequency point according to the feedback result, send a first downlink message to the user equipment, where the first downlink message is used to indicate the coverage of the base station The user equipment within the lowering of the transmission power;

 The switching unit is configured to: if the determining unit determines that there is an available frequency point according to the feedback result, switch the base station to any of the available frequency points, and simultaneously switch the user equipment to the same frequency point.

 In a second possible implementation manner, in combination with the third aspect or the first possible implementation manner, the base station further includes a second determining unit, configured to determine, after the base station learns that there is an adjacent channel interference, Whether there is a carrier available for switching;

If the second determining unit determines that there is an available carrier to perform the handover, the switching unit switches the base station to the any available carrier, and the user equipment switches to the same carrier; the sending unit is specifically configured to: And if the second determining unit determines that there is no available carrier to perform handover, sending a first downlink message to the user equipment, where the first downlink message is used to indicate that the user equipment in the coverage of the base station is lowered. Transmit power.

 A fourth aspect of the present invention provides a user equipment, where the user equipment includes: a receiving unit, a sending unit, a power adjusting unit, and a switching unit;

 The receiving unit is configured to receive a first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the sending power;

 The power adjustment unit is configured to reduce the transmit power of the user equipment according to the first downlink message received by the receiving unit;

 The sending unit is configured to configure, according to the first downlink message, to reduce the sending power of the user equipment, and send a signal to the base station, where the signal carries the user equipment Identification

 The switching unit is configured to switch the second user equipment.

 In a first possible implementation, in combination with the fourth aspect, the switching unit is specifically configured to: receive a handover measurement message sent by the base station, configure, according to the handover measurement message, and perform measurement on a neighboring cell;

 Sending, to the base station, a measurement report for measuring the neighboring cell, so that the base station determines a target cell to be switched according to the measurement report;

 Receiving a handover command sent by the base station;

 Establishing a connection with the target cell according to the handover command.

 In a second possible implementation manner, in combination with the first possible implementation manner of the fourth aspect, the switching unit is specifically configured to:

 Receiving a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station;

Measure the carrier, and send a feedback message to the base station to measure the carrier of the base station, so that the base station determines that the second user equipment performs cutting according to the feedback message. Changed target carrier;

 Receiving a carrier switching message sent by the base station, where the carrier switching message carries target carrier information;

 Switching to the target carrier according to the carrier switching message.

 In a fifth aspect, an embodiment of the present invention provides a handover system, where the system includes: a base station according to a third party and a user equipment according to the fourth aspect.

 An embodiment of the present invention provides a method for handover of a user equipment, a base station, a user equipment, and a handover system, where the method includes: after the base station learns that there is a situation of adjacent-channel interference, sending the first downlink to the user equipment in the coverage of the base station. And the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power. And determining, by the base station, the user equipment that is limited in uplink signal power within the coverage of the base station, according to the signal that is not received by the user equipment. And the second base station sends a second downlink message to the second user equipment, where the second downlink message is used to indicate that the second user equipment increases the sending power, and is used to switch the second user equipment. In this manner, the base station determines, according to the manner of reducing the transmission power of the user equipment, the user equipment with limited uplink signal power in the coverage of the base station, and then timely switches the user equipment with limited uplink signal power, thereby ensuring Normal communication of user equipment.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

FIG. 1 is a flowchart of a method for switching a user equipment according to an embodiment of the present invention; 2 is a flowchart of another method for switching user equipment according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

 FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

 FIG. 5 is a flowchart of a method for switching user equipment according to an embodiment of the present invention; FIG. 6 is a flowchart of a method for switching user equipment according to an embodiment of the present invention; FIG. A schematic diagram of a base station structure;

 FIG. 8 is a schematic structural diagram of another base station according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 At present, the spectrum usage is fixedly allocated. The TV service uses hundreds of megabits of transmission characteristics below 800 MHz and covers the dominant spectrum, but there are a large number of underutilized frequency bands in this spectrum, that is, white space. The existing mobile communication system utilizes cognitive radio technology to perceive the wireless communication environment, and can dynamically detect and effectively access the white space of the television service. However, according to the FCC regulations, if the mobile communication system accesses the blank frequency band of the TV service as the main user signal, and the TV signal appears in the adjacent frequency, in order to avoid interference to the TV signal of the adjacent frequency, the maximum of all user equipments within the coverage of the base station The transmit power needs to be reduced from 20dBm to 16dBm.

 Embodiment 1

The embodiment of the present invention provides a handover method of a user equipment, where the method is applied to a base station of a mobile communication system, and the mobile communication system may be any cellular mobile communication system, such as LTE (Long Term Evolution, LTE), GSM. (Global System of Mobile Communications, Global System for Mobile Communications, UMTS (Universal Mobile Telecommunications System), etc. As shown in Figure 1, the method includes:

 After the base station learns that there is an adjacent channel interference, the first downlink message is sent to the user equipment in the coverage of the base station, where the first downlink message is used to indicate the coverage in the coverage of the base station. The user equipment reduces the transmission power.

 The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station notifies the presence or absence of adjacent-channel interference through its own sensing and measurement, or receives the message of adjacent-channel interference that is detected or measured by other devices, or may notify the base station before the occurrence of the adjacent-frequency interference.

 For the LTE system, the base station may be specifically an eNB. If the eNB acquires an adjacent-channel interference, the eNB sends a first downlink message to all user equipments in an RRC connected state. The downlink message carries the value of the RRC IE P-Max of the user equipment, for example, P-Max=16dBm, the user equipment configures the value of the RRC IE P-Max, and adjusts the sending according to the value of the RRC IE P-Max. power.

 102. The base station receives a signal that is sent by the first user equipment according to the first downlink message, where the signal is sent by the first user equipment, where the first user equipment is The user equipment that communicates normally after the first downlink message is reduced in power.

 After the user equipment receives the first downlink message sent by the base station, the user equipment reduces its transmission power according to the first downlink message. Then, the signal sent by the user equipment to the base station carries the identifier of the user equipment. The identifier of the user equipment may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMEI), and an interconnection protocol between networks ( Internet Protocol, IP), etc., are not specifically limited herein.

103. The base station determines, according to the known user equipment, the second user equipment, and the first user equipment, where the second user equipment is sent by the base station. The user equipment of the signal, that is, the user equipment with limited uplink signal power within the coverage of the base station. It is assumed that the base station is aware of the user equipments having M connection states in the coverage area, and the base station receives N (N<=M) signals of the user equipments in a preset period of time, If the signal carries the identifier of the user equipment, it may be determined that the signals sent by the remaining (MN) user equipments are not received, and then the remaining (MN) user equipments are determined as user equipments with limited uplink signal power, that is, the Second user device.

 104. The base station performs handover on the second user equipment.

 An embodiment of the present invention further provides a method for switching a user equipment. As shown in FIG. 2, the method includes:

 The user equipment receives the first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power.

 The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station notifies the presence or absence of adjacent-channel interference through its own sensing and measurement, or receives the message of adjacent-channel interference that is detected or measured by other devices, or may notify the base station before the occurrence of the adjacent-frequency interference.

 For the LTE system, the base station may be specifically an eNB. If the eNB acquires an adjacent-channel interference, the eNB sends a first downlink message to all user equipments in an RRC connected state. The downlink message carries the value of the RRC IE P-Max of the user equipment, such as: P-Max=16dBm.

 202. The user equipment is configured according to the first downlink message, and reduces a sending power of the user equipment.

 After receiving the first downlink message, the user equipment configures a value of the RRC IE P-Max, and adjusts its own transmit power according to the value of the RRC IE P-Max.

203. The user equipment sends a signal to the base station, where the signal carries an identifier of the user equipment, so that the base station receives a signal that is sent by the first user equipment according to the first downlink message, and then sends a signal. The signal carries an identifier of the first user equipment, where the first The user equipment is a user equipment that is in normal communication after the power is reduced according to the first downlink message; and the base station determines the second user equipment according to the user equipment and the first user equipment in the coverage area thereof. The second user equipment refers to a user equipment that sends the signal that is not received by the base station, that is, a user equipment whose uplink signal power is limited in the coverage of the base station.

 After the user equipment receives the first downlink message sent by the base station, the user equipment reduces its transmission power according to the first downlink message. Then, the signal sent by the user equipment to the base station carries the identifier of the user equipment. The identifier of the user equipment may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMEI), and an interconnection protocol between networks ( Internet Protocol, IP), etc., are not specifically limited herein.

 It is assumed that the base station is aware of the user equipments having M connection states in the coverage area, and the base station receives N (N<=M) signals of the user equipments in a preset period of time, If the signal carries the identifier of the user equipment, it may be determined that the signal sent by the remaining (MN) user equipments is not received, and then the remaining (MN) user equipments are determined as user equipments with limited uplink signal power, that is, The second user equipment is described.

 204. The second user equipment performs handover.

 The embodiment of the present invention provides a base station 30, as shown in FIG. 3, including: a sending unit 31, a receiving unit 32, a first determining unit 33, and a switching unit 34.

 The sending unit 31 is configured to send, by the base station, the first downlink message to the user equipment in the coverage of the base station 30, if the base station learns that the adjacent channel interference is present, where the first downlink message is used. The user equipment in the coverage area of the base station 30 is instructed to reduce the transmission power.

 The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station 30 learns whether there is an adjacent channel interference by itself, or receives a message of adjacent channel interference that is detected or measured by other devices, or the database notifies the base station 30 before the occurrence of the adjacent frequency interference condition.

For the LTE system, the base station 30 may be an eNB if the eNB obtains After the adjacent channel interference is present, the sending unit 31 sends a first downlink message to all the user equipments in the RRC connected state, where the first downlink message carries the value of the RRC IE P-Max of the user equipment, for example: P -Max = 16 dBm, the user equipment configures the value of the RRC IE P-Max, and adjusts its own transmission power according to the value of the RRC IE P-Max.

 The receiving unit 32 is configured to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is The user equipment that communicates normally after the first downlink message is reduced in power.

 After receiving the first downlink message sent by the base station 30, the user equipment reduces its transmission power according to the first downlink message. Then, the signal sent by the user equipment to the base station 30 carries the identifier of the user equipment. The identifier of the user equipment may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMSI), and an interconnection protocol between networks ( Internet Protocol, IP), etc., are not specifically limited herein.

 The first determining unit 33 is configured to determine, according to the known coverage of the base station 30, the user equipment and the first user equipment, where the second user equipment refers to sending the base station 30 not to receive The user equipment of the signal, that is, the user equipment with limited uplink signal power within the coverage of the base station.

 It is assumed that the base station 30 is aware of the user equipments having M connection states in its coverage, and the receiving unit 32 receives N ( N <= M ) signals of the user equipments for a preset period of time. If the signal carries the identifier of the user equipment, it may be determined that the signals sent by the remaining (MN) user equipments are not received, and then the first determining unit 33 determines that the remaining (MN) user equipments are uplink signal power. A restricted user equipment, that is, the second user equipment.

 The switching unit 34 is configured to switch the second user equipment determined by the first determining unit 33.

The embodiment of the present invention further provides a user equipment 40, as shown in FIG. 4, including: a receiving unit 41. The transmitting unit 42, the power adjusting unit 43, and the switching unit 44.

 The receiving unit 41 receives the first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment 40 in the coverage of the base station reduces the transmission power.

 The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station notifies the presence or absence of adjacent-channel interference through its own sensing and measurement, or receives the message of adjacent-channel interference that is detected or measured by other devices, or may notify the base station before the occurrence of the adjacent-frequency interference.

 For the LTE system, the eNB may be the eNB. If the eNB acquires the neighboring interference, the eNB sends the first downlink message to the user equipment 40 in the RRC connected state. A downlink message carries the value of the RRC IE P-Max of the user equipment 40, such as: P-Max = 16 dBm.

 The power adjustment unit 43 is configured to reduce the transmission power of the user equipment 40 according to the first downlink message received by the receiving unit 41.

 After receiving the first downlink message by the second receiving unit 41, the power adjustment unit 43 configures the value of the RRC IE P-Max, and adjusts the transmit power according to the value of the RRC IE P-Max. .

 The sending unit 42 is configured to configure, according to the first downlink message, to reduce the transmission power of the user equipment 40, and send a signal to the base station, where the signal carries the The identifier of the user equipment 40 is configured to enable the base station to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user is The device is a user equipment that is in normal communication after the power is reduced according to the first downlink message; and the base station determines the second user equipment according to the known user equipment and the first user equipment in the coverage area thereof. The second user equipment refers to a user equipment that sends the signal that is not received by the base station, that is, the user equipment 40 whose uplink signal power is limited within the coverage of the base station.

After the receiving unit 41 receives the first downlink message sent by the base station, the power The adjusting unit 43 reduces the transmission power of the user equipment 40 according to the first downlink message. Then, the signal sent by the sending unit 42 to the base station carries the identifier of the user equipment 40. The identifier of the user equipment 40 may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMEI), and an inter-network interconnection. Internet Protocol (IP), etc., are not specifically limited herein.

 It is assumed that the base station is aware of the user equipment 40 having M connection states in its coverage, and the base station receives N ( N <= M ) signals of the user equipment 40 within a preset period of time, The signal carries the identifier of the user equipment 40, and then it can be determined that the signals sent by the remaining (MN) user equipments are not received, and then the remaining (MN) user equipments are determined as user equipments with limited uplink signal power. , that is, the second user equipment.

 The switching unit 44 is configured to switch the second user equipment.

 An embodiment of the present invention provides a handover method of a user equipment, a base station, a user equipment, and a handover system, where the method includes: after the base station learns that there is an adjacent-channel interference, the first downlink is sent to the user equipment in the coverage of the base station. The first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power. Receiving, by the base station, a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is according to the first The user equipment that communicates normally after the downlink message is reduced in power. The base station is based on the unreceived user equipment whose uplink signal power is limited within the coverage of the signal base station. Then, the user equipment with limited uplink signal power is switched in time to ensure normal communication of the user equipment.

 Embodiment 2

 As shown in FIG. 5, an embodiment of the present invention further provides a method for switching a user equipment, where the method includes:

501. After the base station learns that there is a situation of adjacent channel interference, the base station sends a frequency point application message to the spectrum management entity or the database. The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station learns whether there is an adjacent channel interference through its own sensing and measurement, or receives a message of adjacent channel interference that is detected or measured by other devices, or may notify the base station before the occurrence of the adjacent channel interference condition.

 For the LTE system, the base station may be an eNB. If the eNB base station learns that there is adjacent channel interference, the base station applies to the spectrum management entity or the database for frequency switching. The spectrum management entity is a device set up by the organization that manages the spectrum and is managed by the telecommunications carrier. The database is operated by other specialized operators.

 502. The base station receives a feedback result sent by the spectrum management entity or a database.

 The spectrum management entity or database sends a feedback result to the base station. If it is a database, the feedback result is a list of available spectrums, and the base station determines whether there is a suitable frequency point; if it is a spectrum management entity, the feedback result is selected by the spectrum management entity for the base station. The frequency point is either there is no suitable frequency point.

 503. The base station determines, according to the feedback result, whether an available frequency point is available.

 If the base station determines that there is an available frequency point according to the feedback result, step 504 is performed; if the base station determines that there is no available frequency point according to the feedback result, step 505 is performed.

 504. If the base station determines that there is an available frequency point according to the feedback result, the base station switches to the any available frequency point, and simultaneously switches all user equipments to the same frequency point.

 If the current TV signal is a main user signal, in order to avoid interference to the TV signal of the adjacent frequency, when the base station applies the frequency to the spectrum management entity or the database, the base station and the base station may directly All user equipment switches to this frequency point.

For example, when the base station determines that there is an available frequency point, and determines a target frequency point to be switched, the base station sends a handover message to the user equipment, where the handover message includes a target frequency point that the user equipment performs handover, and the The time when the user equipment performs handover and other parameter information of the handover; then the base station and the user equipment simultaneously switch to the target frequency point. The target frequency point may be any frequency point of the available frequency point. 505. If the base station determines that there is no available frequency point according to the feedback result, send a first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used to indicate the user. The device reduces the transmit power.

 When the base station determines that there is no suitable frequency point according to the feedback result, when the base station and the user equipment in the coverage of the base station cannot be switched together, the base station covers the base station according to the FCC. All the user equipments in the RRC connected state send the first downlink message, which is used to reduce the sending power of the user equipment.

 For example, the eNB may send a first downlink message to all the user equipments in the RRC connected state, where the first downlink message carries the value of the RRC IE P-Max of the user equipment, for example: P-Max=16 dBm, indication The user reduces the transmission power.

 506. The user equipment receives a first downlink message sent by the base station.

 507. The user equipment is configured according to the first downlink message, and reduces a sending power of the user equipment.

 The user equipment configures a value of RRC IE P-Max, so that the user equipment adjusts its own power according to the value of the configured RRC IE P-Max.

 508. The user equipment sends a signal to the base station, where the signal carries an identifier of the user equipment.

 The identifier of the user equipment may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMEI), and an inter-network interconnection. Internet Protocol (IP), etc., are not specifically limited herein.

 509. The base station receives a signal that is sent by the user equipment after the power is reduced according to the first downlink message.

After the user equipment reduces its own transmission power, the uplink signal power of some user equipments is limited, which makes the base station unable to receive the signal sent by the user equipment. Generally, after the user equipment retransmits the signal to the base station for a preset number of times, the user equipment does not receive the response message sent by the base station. The preset number of times is also retransmitted at the radio link control layer. If the response message of the base station is still not received, the user equipment enters the radio link failure state. The radio link failure status refers to a state in which the user equipment fails to communicate with the base station.

 510. The base station determines, according to the known user equipment, the second user equipment, and the first user equipment, where the second user equipment is a user that sends the signal that is not received by the base station. The device is a user equipment with limited uplink signal power within the coverage of the base station.

 It is assumed that the base station is aware of the user equipments having M connection states in the coverage area, and the base station receives N (N<=M) signals of the user equipments in a preset period of time, If the signal carries the identifier of the user equipment, it may be determined that the signals sent by the remaining (MN) user equipments are not received, and then the remaining (MN) user equipments are determined as user equipments with limited uplink signal power, that is, the Second user device.

 511. The base station performs handover on the second user equipment.

 The base station may switch the second user equipment to another cell according to actual conditions, or switch the second user equipment to other carriers in the coverage area according to actual conditions.

 512. The second user equipment performs handover.

 An embodiment of the present invention provides a user equipment handover method, where the method includes: after the base station learns that there is an adjacent channel interference, the first downlink message is sent to the user equipment, where the first downlink message is used to indicate the coverage of the base station. The user equipment within range reduces transmission power. The base station determines, according to the received signal sent by the user equipment, the user equipment whose uplink signal power is limited in the coverage, and the signal carries the label of the user equipment. In this manner, the base station determines, according to the manner of reducing the transmission power of the user equipment, the user equipment with limited uplink signal power in the coverage of the base station, and then timely switches the user equipment with limited uplink signal power, thereby ensuring Normal communication of user equipment.

 As shown in FIG. 6, the embodiment of the present invention further provides a method for user equipment handover, where the method includes:

601. After the base station learns that there is an adjacent channel interference, the base station determines whether it is available. The carrier is switched.

 The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. The base station notifies the presence or absence of adjacent-channel interference through its own sensing and measurement, or receives the message of adjacent-channel interference that is detected or measured by other devices, or may notify the base station before the occurrence of the adjacent-frequency interference.

 If the base station determines that there is available carrier for handover, step 602 is performed; if the base station determines that no carrier is available for handover, step 603 is performed.

 Determining, according to the load condition of the carrier, whether the carrier can carry all the user equipments in the RRC connected state of the base station and the coverage of the base station, if the base station determines that a carrier can carry the base station and the All user equipments in the RRC connected state under the coverage of the base station, the base station determines that there are available carriers for handover.

 602. If the base station determines that an available carrier is used for handover, the base station switches to the any available carrier, and simultaneously switches all user equipments to the same carrier.

 603. If the base station determines that there is no available carrier to perform handover, send a first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used to indicate the user. The device reduces the transmit power.

 If the base station determines that there is no available carrier for handover, the base station needs to determine that only the user equipment with limited uplink signal power is switched. The eNB may send the first downlink message to the user equipment in the RRC connected state, for example, the eNB may send the first downlink to all the user equipments in the RRC connected state. The message that the first downlink message carries the value of the RRC IE P-Max of the user equipment, for example, P-Max=16 dBm, instructs the user to reduce the sending power.

 604. The user equipment receives a first downlink message sent by the base station.

605. The user equipment is configured according to the first downlink message, and reduces a sending power of the user equipment. The user equipment configures a value of the RRC IE P-Max, so that the user equipment adjusts its own power according to the value of the configured RRC IE P-Max.

 606. The user equipment sends a signal to the base station, where the signal carries an identifier of the user equipment.

 The identifier of the user equipment may be a Cell Radio Network Temporary Identifier (C-RNTI), an International Mobile Equipment Identification Number (IMEI), and an inter-network interconnection. Internet Protocol (IP), etc., are not specifically limited herein.

 607. The base station receives a signal that is sent by the user equipment after the power is reduced according to the first downlink message.

 After the user equipment reduces its own transmission power, the uplink signal power of some user equipments is limited, which makes the base station unable to receive the signal sent by the user equipment. Generally, after the user equipment retransmits the signal to the base station for a preset number of times, the user equipment does not receive the response message sent by the base station, and then retransmits the preset number of times in the radio link control layer, if the base station is still not received. In response to the message, the user equipment enters a radio link failure state. The radio link failure status refers to a state in which the user equipment fails to communicate with the base station.

 608. The base station determines, according to the known user equipment, the second user equipment, and the first user equipment, where the second user equipment is a user that sends the signal that is not received by the base station. The device is a user equipment with limited uplink signal power within the coverage of the base station.

 It is assumed that the base station is aware of the user equipments having M connection states in the coverage area, and the base station receives N (N<=M) signals of the user equipments in a preset period of time, If the signal carries the identifier of the user equipment, it may be determined that the remaining (MN) user equipments are not received, and then the remaining (MN) user equipments are determined as user equipments with limited uplink signal power, that is, The second user equipment.

 609. The base station performs handover on the second user equipment.

610. The second user equipment performs handover. The base station may switch the second user equipment to other cells according to actual conditions, or switch the second user equipment to other carriers in the coverage area according to actual conditions.

 An embodiment of the present invention provides a user equipment handover method, where the method includes: after a base station learns that there is a situation of adjacent frequency interference, sending a first downlink message to a user equipment, where the first downlink message is used to indicate the base station The user equipment within the coverage reduces the transmission power. And the base station determines, according to the received signal sent by the user equipment, the user equipment whose uplink signal power is limited in the coverage of the base station, where the signal carries the user equipment identifier. In this manner, the base station determines, according to the manner of reducing the transmission power of the user equipment, the user equipment with limited uplink signal power in the coverage of the base station, and then timely switches the user equipment with limited uplink signal power, thereby ensuring Normal communication of user equipment.

In the above embodiment, the base station performs the handover on the second user equipment, and the specific process of the user equipment switching according to the configuration of the base station may include: the second user equipment fails to enter the radio link. Before the state, the base station sends a second downlink message to the second user equipment, where the radio link failure status refers to a state in which the user equipment fails to communicate with the base station, and the second downlink message is used to indicate the location. The second user equipment increases the transmission power. The base station sends a handover measurement message to the second user equipment, so that the second user equipment performs measurement on the neighboring cell, and the second user equipment receives the handover measurement message sent by the base station, according to the The handover measurement message configures the second user equipment to measure neighboring cells. The second user equipment performs measurement on the neighboring cell, and sends a measurement report to the base station to measure the neighboring cell, so that the base station determines the second user equipment according to the measurement report. The target cell for handover. The base station determines, according to the measurement report that the second user equipment sends the measurement to the neighboring cell, the target cell that the second user equipment performs handover. And the base station sends a handover request message to the target cell, requesting the second user equipment to switch to the target cell. After the base station receives the handover request feedback message of the target cell, the base station sends a handover command to the second user equipment, where the LTE system is specifically an RRC connection message, and the second user equipment receives the base station transmission RRC connection The message, according to the handover command, the second user equipment establishes a connection according to the target cell. The base station performs the handover on the second user equipment, and the specific process of the second user equipment to perform the handover according to the configuration of the base station may further include: before the second user equipment enters the radio link failure state, The base station sends a second downlink message to the second user equipment, where the radio link failure status refers to a state in which the user equipment fails to communicate with the base station, and the second downlink message is used to indicate the second user. The device increases the transmit power. The base station sends a handover measurement message to the second user equipment, so that the second user equipment performs measurement on the carrier. The second user equipment receives a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station. The second user equipment measures the carrier, and sends a feedback message to the base station to measure the carrier of the base station, so that the base station determines, according to the feedback message, that the second user equipment performs the handover target. Carrier. The base station receives a feedback message sent by the second user equipment after measuring the carrier. Determining, by the base station, the target carrier that the second user equipment performs handover, according to the feedback message sent by the second user equipment after measuring the carrier. The base station sends a carrier switching message to the second user equipment, where the carrier switching message carries target carrier information, so that the second user equipment switches to the target carrier. The second user equipment receives a carrier switching message sent by the base station, where the carrier switching message carries target carrier information. The second user equipment switches to the target carrier according to the carrier switching message.

 Embodiment 3

 As shown in FIG. 7, the embodiment of the present invention further provides a base station 70, where the base station 70 is applied to a mobile communication system, and the mobile communication system may be LTE. The base station 70 includes: a sending unit 71, a receiving unit 72, and a first The determining unit 73, and the switching unit 74 and the judging unit 75.

 The sending unit 71 is configured to send a frequency point request message to the spectrum management entity or the database after the base station 70 learns that there is an adjacent channel interference.

The adjacent channel interference refers to a situation in which a neighboring cell has a channel adjacent to the working channel of the current cell, and adjacent channel interference occurs when a signal occurs in the adjacent channel. Base station 70 passes itself The sensing or measuring is informed that there is a situation of adjacent frequency interference, or receiving a message of adjacent channel interference perceived or measured by other devices, or the database may notify the base station 70 before the occurrence of the adjacent frequency interference condition.

 For the LTE system, the base station 70 may be an eNB. If the eNB learns that there is an adjacent channel interference, the sending unit 71 applies to the spectrum management entity or the database for other frequency point switching.

 The spectrum management entity is a device set up by the organization that manages the spectrum and is managed by the telecommunications carrier. The database is operated by other specialized operators.

 The receiving unit 72 is configured to receive a feedback result sent by the spectrum management entity or a database.

 The spectrum management entity or database sends a feedback result to the base station 70. If it is a database, the feedback result is a list of available spectrums, and the base station 70 determines whether there is a suitable frequency point; if it is a spectrum management entity, the feedback result is that the spectrum management entity is a base station. 70 selected frequency points or there is no suitable frequency point.

 The determining unit 75 is configured to determine, according to the feedback result, whether there is an available frequency point.

 The switching unit 74 is configured to: if the determining unit determines that there is an available frequency point according to the feedback result, switch the base station 70 to any of the available frequency points, and simultaneously switch the user equipment to the same frequency. point.

 The sending unit 71 is further configured to: if the determining unit 75 determines that there is no available frequency point according to the feedback result, send a first downlink message to the user equipment, where the first downlink message is used to indicate the The user equipment within the coverage of the base station 70 reduces the transmission power.

 The determining unit 75 determines that there is no suitable frequency point according to the feedback result, so that when the user equipment under the coverage of the base station 70 and the base station 70 cannot be switched together, the sending unit 71 is in accordance with the FCC regulations. Sending a first downlink message to all user equipments in the RRC connected state in the coverage area of the base station 70, for reducing the transmission power of the user equipment.

For example, the sending unit 71 may send a first downlink message to all user equipments in an RRC connected state, where the first downlink message carries the RRC IE P-Max of the user equipment. A value, such as: P-Max = 16 dBm, instructs the user to reduce the transmit power.

 The receiving unit 72 is configured to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is The user equipment that communicates normally after the first downlink message is reduced in power.

 After the user equipment reduces its own transmission power, the uplink signal power of some user equipments is limited, which makes the receiving unit 72 unable to receive the signal transmitted by the user equipment with limited uplink signal power. Generally, after the user equipment retransmits the signal to the base station 70 for a preset number of times, the user equipment does not receive the response message sent by the base station 70, and then retransmits the preset number of times in the radio link control layer, if still not received. The response message from the base station 70, the user equipment enters the radio link failure state.

 The first determining unit 73 is configured to determine, according to the known coverage of the base station 70, the user equipment and the first user equipment, where the second user equipment refers to sending the base station 70 not to receive The user equipment of the signal, that is, the user equipment whose uplink signal power is limited within the coverage of the base station 70.

 The switching unit 74 is configured to switch the second user equipment determined by the first determining unit.

 The current TV signal is a main user signal. In order to avoid interference to the TV signal of the adjacent frequency, when the transmitting unit 71 applies the frequency to the spectrum management entity or the database, the base station 70 and the base station 70 can be directly covered. All user devices switch to this frequency.

 For example, when the determining unit 75 determines that there is an available frequency point, and determines a target frequency point to be switched, the switching unit 74 sends a handover message to the user equipment, where the handover message includes the user equipment to perform handover. The target frequency, the time when the user equipment performs handover, and other parameter information of the handover; then the base station 70 and the user equipment simultaneously switch to the target frequency.

 The target frequency point may be any frequency point of the available frequency point.

An embodiment of the present invention provides a base station, where the base station includes a sending unit, a receiving unit, a first determining unit, a switching unit, and a determining unit. After the base station learns that there is a situation of adjacent frequency interference, First, the transmitting unit applies for a frequency point to the spectrum management entity or the database, and then the determining unit determines whether there is a frequency point available for switching according to the feedback result fed back by the spectrum management entity or the database. If the determining unit determines that there is an available frequency point, the switching unit will The user equipment in the coverage of the base station and the base station is switched to the target frequency point. If the determining unit determines that there is no available frequency point, the sending unit sends a first downlink message to the user equipment, where the first downlink message is used. The user equipment in the coverage of the base station is instructed to reduce the transmission power. And the first determining unit of the base station determines, according to the signal that is sent by the user equipment, the second user equipment, where the signal carries an identifier of the user equipment, where the second user equipment is User equipment with limited uplink signal power within the coverage of the base station. The switching unit then switches the second user equipment. In this manner, the base station determines, according to the manner of reducing the transmission power of the user equipment, the user equipment with limited uplink signal power in the coverage of the base station, and then timely switches the user equipment with limited uplink signal power, thereby ensuring Normal communication of user equipment.

 Embodiment 4

 As shown in FIG. 8, the embodiment of the present invention further provides a base station 80, where the base station 80 is applied to a mobile communication system, where the mobile communication system is LTE, and the base station 80 includes: a second determining unit 81, a sending unit 82, The receiving unit 83, the first determining unit 84, and the switching unit 85.

 The second determining unit 81 is configured to determine, after the base station 80 learns that there is an adjacent channel interference, whether the user equipment has an available carrier to perform handover.

 The second determining unit 81 determines, according to the load condition of the carrier, whether other carriers in the service area can carry all the user equipments in the RRC connected state in the coverage of the base station 80 and the base station 80, if the second determining The unit 81 determines that a carrier in the coverage of the base station 80 can carry all the user equipments in the RRC connected state under the coverage of the base station 80 and the base station 80, and the second determining unit 81 determines that the carrier is available. Switch.

The sending unit 82 is configured to: if the second determining unit 81 determines that no carrier is available for handover, send a first downlink message to the user equipment, where the first downlink message is used to indicate the base station The user equipment within the coverage of 80 reduces the transmission power. If the second determining unit 81 determines that there is no available carrier for handover, the base station 80 needs to determine that only the user equipment whose uplink signal power is limited is switched. In this way, the sending unit 82 sends a first downlink message to the user equipment in the RRC connected state in the coverage area of the base station 80, and instructs the user equipment to reduce the sending power.

 For example, the sending unit 82 may send a first downlink message to all the user equipments in the RRC connected state, where the first downlink message carries the value of the RRC IE P-Max of the user equipment, for example: P-Max = 16dBm, indicating that the user reduces the transmission power.

 The receiving unit 83 is configured to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is The user equipment that communicates normally after the first downlink message is reduced in power.

 After the user equipment reduces its own transmission power, the uplink signal power of some user equipments is limited, which makes the receiving unit 83 unable to receive the signal transmitted by the user equipment with limited uplink signal power. Generally, after the user equipment retransmits the signal to the base station 80 for a preset number of times, the user equipment does not receive the response message sent by the base station 80, and then retransmits the preset number of times in the radio link control layer, if still not received. The response message of the base station 80, the user equipment enters the radio link failure state.

 The first determining unit 84 is configured to determine, according to the known coverage of the base station 80, the user equipment and the first user equipment, where the second user equipment refers to sending the base station 80 not to receive The user equipment of the signal, that is, the user equipment whose uplink signal power is limited within the coverage of the base station 80.

 The switching unit 85 is configured to switch the second user equipment.

 If the second determining unit 84 determines that there is an available carrier for handover, the switching unit 85 is further configured to switch the base station 80 to the any available carrier while the user equipment switches to the same carrier.

The second determining unit 84 determines, according to the load condition of the carrier, whether other carriers in the service area can carry all the RRC connected states under the coverage of the base station 80 and the base station 80. User equipment, if the base station 80 determines that the coverage area has a carrier that can carry all the user equipments in the RRC connected state under the coverage of the base station 80 and the base station 80, the base station 80 determines that there are available carriers for switching. .

 An embodiment of the present invention provides a base station, where the base station includes a second determining unit, a sending unit, a receiving unit, a first determining unit, and a switching unit. The base station detects that the adjacent frequency signal changes or is about to change, first determines whether the coverage is available by using the second determining unit, and if the other carriers are available, the switching unit directly covers the base station and the base station. The user equipment in the range switches to the available target carrier. If there is no other carrier available, the sending unit sends a first downlink message to the user equipment, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the sending power. And the signal is carried by the user equipment identifier according to the signal that is sent by the user equipment, and the first determining unit of the base station determines the second user equipment, where the second user equipment is User equipment with limited uplink signal power within the coverage of the base station. In this manner, the base station determines, according to the manner of reducing the transmission power of the user equipment, the user equipment with limited uplink signal power in the coverage of the base station, and then timely switches the user equipment with limited uplink signal power, thereby ensuring Normal communication of user equipment.

 The switching of the second user equipment by the switching unit 74 or the switching unit 85 in the foregoing embodiments 3 and 4 specifically includes:

Before the second user equipment enters the radio link failure state, sending a second downlink message to the second user equipment, where the second downlink message is used to indicate that the second user equipment increases the transmission power; The second user equipment sends a handover measurement message, so that the second user equipment performs measurement on the neighboring cell; and then determines the second according to the measurement report that is sent by the second user equipment to measure the neighboring cell. a target cell that performs handover by the user equipment; sending a handover request message to the target cell, requesting the second user equipment to switch to the target cell; and receiving a handover request feedback message of the target cell to send to the second user equipment a handover command, specifically an RRC connection message in the LTE system, such that the second user equipment and the The target cell establishes a connection.

 The switching of the second user equipment by the switching unit 74 or the switching unit 85 in the foregoing embodiment may further include:

 Before the second user equipment enters the radio link failure state, sending a second downlink message to the second user equipment, where the second downlink message is used to indicate that the second user equipment increases the transmission power; The second user equipment sends a handover measurement message, so that the user equipment performs measurement on the carrier. Receiving a feedback message sent by the second user equipment after measuring the carrier. Determining, according to the feedback message sent by the second user equipment after measuring the carrier, determining, by the second user equipment, a target carrier that performs handover. Sending a carrier switching message to the second user equipment, where the carrier switching message carries target carrier information, so that the second user equipment switches to the target carrier.

 Embodiment 5

 As shown in FIG. 4, an embodiment of the present invention further provides a user equipment 40, including: a receiving unit 41, a sending unit 42, a power adjusting unit 43, and a switching unit 44.

 The receiving unit 41 is configured to receive a first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment 40 in the coverage of the base station reduces the transmission power.

 The power adjustment unit 43 is configured to perform configuration according to the first downlink message received by the receiving unit, and reduce the transmission power of the user equipment 40.

The sending unit 42 is configured to configure, according to the first downlink message, to reduce the transmission power of the user equipment 40, and send a signal to the base station, where the signal carries the The identifier of the user equipment 40 is configured to enable the base station to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user is The device is a user equipment that is in normal communication after the power is reduced according to the first downlink message; and the base station determines the second user equipment according to the known user equipment and the first user equipment in the coverage area thereof. The second user equipment refers to sending the The user equipment of the signal that is not received by the base station, that is, the user equipment 40 whose uplink signal power is limited within the coverage of the base station.

 The switching unit 44 is configured to switch the second user equipment.

 Optionally, the switching unit 44 is specifically configured to: receive a handover measurement message sent by the base station, configure, according to the handover measurement message, and perform measurement on a neighboring cell.

 And transmitting, to the base station, a measurement report for measuring the neighboring cell, so that the base station determines the target cell of the handover according to the measurement report.

 Receiving a handover command sent by the base station.

 Establishing a connection with the target cell according to the handover command.

 The handover command may specifically be an RRC connection message.

 Optionally, the switching unit 44 is further configured to: receive a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station. The carrier is measured, and a feedback message for measuring the carrier of the base station is sent to the base station, so that the base station determines, according to the feedback message, the target carrier that the second user equipment performs handover. Receiving a carrier switching message sent by the base station, where the carrier switching message carries target carrier information.

 Switching to the target carrier according to the carrier switching message.

An embodiment of the present invention provides a user equipment, where the user equipment includes a receiving unit, a sending unit, a power adjusting unit, and a switching unit. First, the user equipment receives the first downlink message sent by the base station after the base station learns that the adjacent channel interferes, and the first downlink message is used to indicate the user equipment in the coverage of the base station. Reduce the transmission power. The power adjustment unit is configured according to the first downlink message received by the receiving unit, and reduces the transmission power of the user equipment. The sending unit sends a signal to the base station, where the signal carries an identifier of the user equipment, so that the base station receives a signal that is sent by the first user equipment after the power is reduced according to the first downlink message, The signal carries the identifier of the first user equipment, and the first user equipment is configured to reduce power according to the first downlink message. a normal user equipment; and, the base station determines a second user equipment according to the user equipment and the first user equipment in the coverage area thereof, where the second user equipment refers to sending the base station that is not received by the base station. The user equipment of the signal, that is, the user equipment whose uplink signal power is limited within the coverage of the base station. In this way, the switching unit switches the second user equipment to ensure normal communication of the user equipment.

 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request
A method for switching user equipment, characterized in that it comprises:
 After the base station learns that the adjacent channel interferes, the first downlink message is sent to the user equipment in the coverage of the base station, where the first downlink message is used to indicate that the user equipment in the coverage of the base station is reduced. Power
 Receiving, by the base station, a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is according to the first A user equipment that communicates normally after the downlink message is reduced in power;
 Determining, by the base station, the second user equipment according to the user equipment and the first user equipment in the coverage area, where the second user equipment refers to the user equipment that sends the signal that is not received by the base station, That is, the user equipment with limited uplink signal power in the coverage of the base station; the base station switches the second user equipment.
 The method according to claim 1, wherein after the base station learns that there is a situation of adjacent frequency interference, the method further includes:
 Sending, by the base station, a frequency point application message to a spectrum management entity or a database;
 Receiving, by the base station, a feedback result sent by the spectrum management entity or a database;
 Determining, by the base station, whether there is an available frequency point according to the feedback result;
 If the base station determines that there is an available frequency point according to the feedback result, the base station switches to any of the available frequency points, and simultaneously switches all user equipments to the same frequency point;
 And if the base station determines that there is no available frequency point according to the feedback result, sending, by the user equipment, the first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used to indicate that the user equipment is lowered. Transmit power.
 The method according to claim 1, wherein after the base station learns that there is a situation of adjacent frequency interference, the method further includes:
Determining, by the base station, whether a carrier is available for handover; If the base station determines that there is a carrier available for handover, the base station switches to any of the available carriers, and simultaneously switches all user equipments to the same carrier;
 And if the base station determines that there is no available carrier to perform handover, sending a first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used by the indicated user equipment to reduce the transmission power.
 The method according to claim 1, wherein the switching, by the base station, the second user equipment comprises:
 Before the second user equipment enters the radio link failure state, the base station sends a second downlink message to the second user equipment, where the radio link failure status refers to that the user equipment fails to communicate with the base station. a status, the second downlink message is used to indicate that the second user equipment increases the sending power;
 Sending, by the base station, a handover measurement message to the second user equipment, so that the second user equipment performs measurement on a neighboring cell;
 Receiving, by the second user equipment, a measurement report that is sent by the second user equipment to measure the neighboring cell, and determining, according to the measurement report, the target cell that the second user equipment performs handover;
 Sending, by the base station, a handover request message to the target cell, requesting the second user equipment to switch to the target cell;
 Receiving, by the base station, a handover request feedback message of the target cell;
 The base station sends a handover command to the second user equipment, so that the second user equipment establishes a connection with the target cell.
 The method according to claim 1, wherein the switching, by the base station, the second user equipment comprises:
 Before the second user equipment enters the radio link failure state, the base station sends a second downlink message to the second user equipment, where the second downlink message is used to indicate that the second user equipment is increased. Transmitting power
Sending, by the base station, a handover measurement message to the second user equipment, so that the second The household device measures the carrier;
 Receiving, by the base station, a feedback message sent by the second user equipment after measuring the carrier;
 Determining, by the base station, a target message that is performed by the second user equipment to perform handover according to the feedback message sent by the second user equipment after measuring the carrier;
 The base station sends a carrier switching message to the second user equipment, where the carrier switching message carries target carrier information, so that the second user equipment switches to the target carrier.
 A method for switching user equipment, characterized in that the method comprises:
 Receiving, by the user equipment, the first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power;
 The user equipment is configured according to the first downlink message, and reduces the sending power of the user equipment;
 The user equipment sends a signal to the base station, where the signal carries the identifier of the user equipment, so that the base station receives a signal that is sent by the first user equipment after the power is reduced according to the first downlink message, The signal carries the identifier of the first user equipment, where the first user equipment is a user equipment that is normal after the power is reduced according to the first downlink message; and the base station is based on the known coverage area. The user equipment and the first user equipment determine the second user equipment, where the second user equipment refers to the user equipment that sends the signal that is not received by the base station, that is, the uplink signal power is limited in the coverage of the base station. User equipment;
 The second user equipment performs handover.
 The method according to claim 6, wherein the switching by the second user equipment specifically includes:
 Receiving, by the second user equipment, a handover measurement message sent by the base station, where the handover measurement message is used to enable the second user equipment to perform measurement on a neighboring cell;
 The second user equipment performs measurement on the neighboring cell;
Transmitting, by the second user equipment, a measurement report for measuring the neighboring cell to the base station And determining, by the base station, the target cell that the second user equipment performs handover according to the measurement report;
 Receiving, by the second user equipment, a handover command sent by the base station;
 And the second user equipment establishes a connection with the target cell according to the handover command.
The method according to claim 6, wherein the switching by the second user equipment specifically includes:
 The second user equipment receives a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station;
 The second user equipment measures the carrier, and sends a feedback message to the base station to measure the carrier of the base station, so that the base station determines, according to the feedback message, that the second user equipment performs the handover target. Carrier wave
 Receiving, by the second user equipment, a carrier switching message sent by the base station, where the carrier switching message carries target carrier information;
 The second user equipment switches to the target carrier according to the carrier switching message.
 9. The method according to claim 6, comprising:
 If the user equipment is determined by the base station as the second user equipment, before the second user equipment enters a radio link failure state, the second user equipment performs handover, and the radio link failure status refers to the A state in which the user equipment fails to communicate with the base station.
 A base station, comprising: a transmitting unit, a receiving unit, a first determining unit, and a switching unit;
 And the sending unit, configured to send, by the base station, the first downlink message to the user equipment in the coverage of the base station, where the first downlink message is used to indicate the The user equipment reduces the transmission power;
The receiving unit is configured to receive a signal that is sent by the first user equipment according to the first downlink message, where the signal carries the identifier of the first user equipment, where the first user equipment is a Determining, by the first downlink message, a user equipment that communicates normally after reducing power; The first determining unit is configured to determine, according to the known coverage of the base station, the user equipment and the first user equipment, where the second user equipment is to send the location that the base station does not receive. a user equipment of the signal, that is, a user equipment with limited uplink signal power within the coverage of the base station;
 The switching unit is configured to switch the second user equipment determined by the first determining unit.
 11. The base station according to claim 10, characterized in that
 The sending unit is further configured to: after the base station learns that there is an adjacent channel interference, send a frequency point request message to the spectrum management entity or the database;
 The receiving unit is further configured to receive a feedback result sent by the spectrum management entity or a database;
 The base station further includes a determining unit, configured to determine, according to the feedback result, whether an available frequency point is available;
 The sending unit is configured to: if the determining unit determines that there is no available frequency point according to the feedback result, send a first downlink message to the user equipment, where the first downlink message is used to indicate the coverage of the base station The user equipment within the lowering of the transmission power;
 The switching unit is configured to: if the determining unit determines that there is an available frequency point according to the feedback result, switch the base station to any of the available frequency points, and simultaneously switch the user equipment to the same frequency point.
 The base station according to claim 10, wherein the base station further comprises: a second determining unit, configured to determine, after the base station learns that there is an adjacent channel interference, whether there is an available carrier to perform handover;
 If the second determining unit determines that there is an available carrier to perform the handover, the switching unit switches the base station to the any available carrier, and the user equipment switches to the same carrier; the sending unit is specifically configured to:
If the second determining unit determines that no carrier is available for switching, setting the user to the user A first downlink message is sent, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the transmission power.
 13. A user equipment, comprising: a receiving unit, a transmitting unit, a power adjusting unit, and a switching unit;
 The receiving unit is configured to receive a first downlink message sent by the base station, where the first downlink message is used to indicate that the user equipment in the coverage of the base station reduces the sending power;
 The power adjustment unit is configured to perform configuration according to the first downlink message received by the receiving unit, to reduce a transmit power of the user equipment;
 The sending unit is configured to configure, according to the first downlink message, to reduce the sending power of the user equipment, and send a signal to the base station, where the signal carries the user equipment Identification
 The switching unit is configured to switch the second user equipment.
 The user equipment according to claim 13, wherein the switching unit is specifically configured to:
 Receiving a handover measurement message sent by the base station, configuring, according to the handover measurement message, and performing measurement on a neighboring cell;
 Sending, to the base station, a measurement report for measuring the neighboring cell, so that the base station determines a target cell to be switched according to the measurement report;
 Receiving a handover command sent by the base station;
 Establishing a connection with the target cell according to the handover command.
 The user equipment according to claim 13, wherein the switching unit is further configured to:
 Receiving a handover measurement message sent by the base station, where the handover measurement message configures the second user equipment to measure a carrier of the base station;
Measure the carrier, and send a feedback message to the base station to measure the carrier of the base station, so that the base station determines that the second user equipment performs cutting according to the feedback message. Changed target carrier;
 Receiving a carrier switching message sent by the base station, where the carrier switching message carries target carrier information;
 Switching to the target carrier according to the carrier switching message.
 A handover system, characterized in that the system comprises: the base station according to any one of claims 10-12 and the user equipment according to any one of claims 13-15.
PCT/CN2013/077296 2012-08-27 2013-06-17 Handover method for user equipment, base station, user equipment, and handover system WO2014032453A1 (en)

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