WO2015113275A1 - 一种选择小区的装置、方法及系统 - Google Patents

一种选择小区的装置、方法及系统 Download PDF

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Publication number
WO2015113275A1
WO2015113275A1 PCT/CN2014/071803 CN2014071803W WO2015113275A1 WO 2015113275 A1 WO2015113275 A1 WO 2015113275A1 CN 2014071803 W CN2014071803 W CN 2014071803W WO 2015113275 A1 WO2015113275 A1 WO 2015113275A1
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WO
WIPO (PCT)
Prior art keywords
cell
threshold
received signal
communication parameter
terminal device
Prior art date
Application number
PCT/CN2014/071803
Other languages
English (en)
French (fr)
Inventor
胡振兴
权威
高永强
杨晓东
张戬
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201911400636.4A priority Critical patent/CN111182596B/zh
Priority to EP14880893.4A priority patent/EP3091786B1/en
Priority to CN201480006188.9A priority patent/CN104969618B/zh
Priority to PCT/CN2014/071803 priority patent/WO2015113275A1/zh
Publication of WO2015113275A1 publication Critical patent/WO2015113275A1/zh
Priority to US15/221,858 priority patent/US10390298B2/en
Priority to US16/544,744 priority patent/US11071056B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • H04B17/318Received signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to the field of communications, and in particular, to an apparatus, method and system for selecting a cell.
  • processes related to mobility of terminal devices include cell selection and cell reselection.
  • the terminal device when the terminal device is powered on or enters the signal coverage area from the blind spot, if the terminal device does not store the cell information in which the terminal device is powered on or enters the signal coverage area from the blind spot, first, the terminal device scans all available. Radio frequency channel, on the carrier frequency of each radio frequency channel, the terminal device searches only the cell with the best radio frequency channel quality, then measures the communication parameter value of the cell, and simultaneously receives the broadcast message sent by the base station, and then according to S ( Select, The criterion is to determine whether the cell searched by the terminal device is a suitable cell for the terminal device to camp on.
  • the terminal device When the communication parameter value measured by the terminal device satisfies the S criterion, the terminal device sets the cell as a service of the terminal device. Community.
  • the communication parameter is a received signal strength or a received signal quality. It should be noted that, when the terminal device sets the cell as the serving cell of the terminal device, the communication state of the cell is a non-prohibited state, and the forbidden state of the cell is that the cell can only provide an emergency call for the terminal device. The status of the communication service.
  • the terminal device After the terminal device camps on the serving cell, if the broadcast message received by the terminal device includes the neighboring cell of the serving cell, and the priority of the neighboring cell is higher than the priority of the serving cell, the terminal device The neighboring cell performs measurement, and if the received signal strength of the neighboring cell is higher than the preset threshold of the neighboring cell in the broadcast message in the cell reselection time, the neighboring cell is used as the terminal device for cell reselection. The target cell, the terminal device reselects to the target cell.
  • the terminal device performs measurement on the neighboring cell, and if the neighboring cell satisfies the S criterion and the R (Reselect, reselection) criterion, the neighboring cell is used as the terminal device.
  • the target cell that performs cell reselection, and the terminal device reselects to the target cell.
  • the Q and the Qff are used to prevent a ping-pong effect when used for cell reselection.
  • the neighboring cell serves as a target cell for cell reselection by the terminal device, and the terminal device reselects to the target cell.
  • the signal transmitted by the base station to the terminal device may be diffracted, reflected, etc. by the obstacle, and the signal received by the terminal device through the obstacle may be lost. Therefore, when the terminal device is idle In the state, the measured communication parameter value of the received signal is low, and cannot meet the requirements of the existing cell selection and cell reselection, thereby causing the terminal device to fail to perform normal communication.
  • Embodiments of the present invention provide an apparatus, method, and system for selecting a cell, which enable the terminal device to perform normal communication.
  • a terminal device including:
  • a first measurement unit configured to measure a communication parameter value of a received signal of the first cell, where the first cell is a cell capable of providing a communication service for the terminal device;
  • a first determining unit configured to determine whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a first minimum threshold and a communication parameter of a received signal of the first cell a sum of offsets of a first minimum threshold of communication parameters of a received signal of the first cell; a first acquiring unit, configured to acquire a second threshold from a broadcast message if the communication parameter value is less than or equal to the first threshold, where the second threshold includes at least a communication parameter of a received signal of the first cell a sum of a first minimum threshold and an offset of a second minimum threshold of a communication parameter of the received signal of the first cell, or the second threshold includes at least a communication parameter of a received signal of the first cell a sum of a minimum threshold value and an offset of a first minimum threshold of a communication parameter of the received signal of the first cell; a second determining unit, configured to determine whether the communication parameter value is greater than the second threshold;
  • a first setting unit configured to: if the communication parameter value is greater than the second threshold, set the first cell as a serving cell of the terminal device.
  • the terminal device further includes:
  • a second measurement unit configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell;
  • a second acquiring unit configured to acquire, by using the broadcast message, a first threshold of the second cell or a first threshold of the second cell, where the first threshold includes at least receiving by the second cell a sum of a first minimum threshold of a communication parameter of the signal and an offset of a first minimum threshold of a communication parameter of the received signal of the second cell;
  • a third determining unit configured to determine whether the communication parameter value is greater than the first threshold, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold;
  • a second setting unit configured to: if the communication parameter value is greater than the first threshold, or the difference between the communication parameter value and the first threshold is greater than the first threshold, the second cell Provided as a serving cell of the terminal device;
  • the second setting unit is further configured to: if the communication parameter value is less than or equal to the first threshold, or the difference between the communication parameter value and the first threshold is less than or equal to the first threshold, Determining a frequency priority of the first cell and a frequency of the second cell And determining, by the broadcast message, a corresponding parameter selected from the broadcast message to the second cell to determine that the second cell is configured as a serving cell of the terminal device, where the corresponding parameter includes at least the The amount of hysteresis of the communication parameter of the received signal of the first cell and the offset of the communication parameter of the received signal of the second cell.
  • the first setting unit is further configured to: if the communication parameter value of the received signal of the first cell is greater than a first threshold of the first cell, set the first cell as a serving cell of the terminal device;
  • the terminal device further includes:
  • a third measurement unit configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell;
  • a third acquiring unit configured to: when a communication parameter value of the received signal of the first cell is less than or equal to a first threshold of the first cell, acquire a second threshold of the second cell from the broadcast message, where The second threshold includes at least a sum of a second minimum threshold of the communication parameter of the received signal of the second cell and a first minimum threshold of the communication parameter of the received signal of the second cell, or The difference between the communication parameter value of the received signal of the first cell and the first threshold of the first cell is less than or equal to the first threshold, and the second threshold of the second cell is obtained;
  • a fourth determining unit configured to determine whether a communication parameter value of the received signal of the second cell is greater than a second threshold of the second cell, or a communication parameter value of the received signal of the second cell Whether the difference between the two thresholds is greater than the second threshold;
  • the third setting unit is configured to: if the communication parameter value is greater than the second threshold, or the difference between the communication parameter value and the second threshold is greater than The second threshold, the second cell is set as a serving cell of the terminal device;
  • the third setting unit is further configured to: if a communication parameter value of the second cell is less than or equal to the second threshold, or a difference between the communication parameter value and the second threshold is less than or equal to the second a threshold value, according to the frequency priority of the first cell and the first Determining, by the broadcast message, a corresponding parameter selected from the broadcast message to the serving cell of the terminal device, where the corresponding parameter is at least And including an amount of hysteresis of the communication parameter of the received signal of the first cell and an offset of the communication parameter of the received signal of the second cell.
  • a receiving unit configured to receive a broadcast message sent by a base station to which the first cell belongs, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and the receiving of the first cell a hysteresis amount of a communication parameter of the signal, an offset of a communication parameter of the received signal of the second cell, a second threshold value of the second cell, a frequency priority parameter of the first cell, and the At least one of a frequency priority parameter of the second cell and a selected cell level parameter.
  • the receiving unit is further configured to:
  • the detection of the broadcast message is repeated until the broadcast message is detected, and the broadcast message is received.
  • the sending unit is configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that The mobility management entity pages the terminal device according to the update message, where the update message includes an identifier of the second cell, a hysteresis of a communication parameter of the received signal, an offset of the communication parameter of the received signal, and a second At least one of the threshold values.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold of the received signal strength value
  • the A 1 is a received signal
  • the offset of the minimum threshold of the intensity value, the C being the compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • a base station including:
  • An acquiring unit configured to acquire a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a The offset of the communication parameter of the received signal of the second cell and the second threshold of the second cell, the frequency priority parameter of the first cell, the frequency priority parameter of the second cell, and the selected cell level At least one of the parameters, the second cell is a neighboring cell of the first cell;
  • a sending unit configured to send a broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the obtaining unit is specifically configured to:
  • the broadcast message is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the sending unit is further configured to:
  • the broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the base station further includes: a receiving unit, configured to receive an update message sent by the terminal device, where the update message includes an identifier of the second cell, At least one of a hysteresis of a communication parameter of the received signal of the first cell, an offset of the communication parameter of the received signal of the second cell, and a second threshold to facilitate transparent transmission of the update message to the mobility management An entity, causing the mobility management entity to page the terminal device according to the update message.
  • a communication system including:
  • the fourth aspect provides a terminal device, including:
  • a processor configured to measure a communication parameter value of a received signal of the first cell, where the first cell is a cell capable of providing communication services for the terminal device;
  • the processor is further configured to determine whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a first minimum threshold and a communication parameter of a received signal of the first cell a sum of offsets of a first minimum threshold of communication parameters of a received signal of the first cell;
  • the processor is further configured to: when the communication parameter value is less than or equal to the first threshold, acquire a second threshold from a broadcast message, where the second threshold includes at least a communication parameter of a received signal of the first cell a sum of a first minimum threshold and an offset of a second minimum threshold of a communication parameter of the received signal of the first cell, or the second threshold includes at least a communication parameter of a received signal of the first cell a sum of a minimum threshold value and an offset of a first minimum threshold of a communication parameter of the received signal of the first cell; the processor is further configured to determine whether the communication parameter value is greater than the second threshold;
  • the processor is further configured to: if the communication parameter value is greater than the second threshold, set the first cell as a serving cell of the terminal device.
  • the processor is further configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell;
  • the processor is further configured to acquire, by using the broadcast message, a first threshold of the second cell or a first threshold of the second cell, where the first threshold includes at least receiving by the second cell a sum of a first minimum threshold of a communication parameter of the signal and an offset of a first minimum threshold of a communication parameter of the received signal of the second cell;
  • the processor is further configured to determine whether the communication parameter value is greater than the first threshold a value, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold;
  • the processor is further configured to: if the communication parameter value is greater than the first threshold, or the difference between the communication parameter value and the first threshold is greater than the first threshold, the second cell Provided as a serving cell of the terminal device;
  • the processor is further configured to: if the communication parameter value is less than or equal to the first threshold, or the difference between the communication parameter value and the first threshold is less than or equal to the first threshold, according to the Determining a relationship between a frequency priority of the first cell and a frequency priority of the second cell, and acquiring, by using the broadcast message, a corresponding parameter selected to the second cell to determine to set the second cell as a
  • the serving cell of the terminal device, the corresponding parameter includes at least a delay amount of a communication parameter of a received signal of the first cell and an offset amount of a communication parameter of a received signal of the second cell.
  • the processor is further configured to: if the communication parameter value of the received signal of the first cell is greater than a first threshold of the first cell, set the first cell as a serving cell of the terminal device;
  • the processor is further configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell;
  • the processor is further configured to: when a communication parameter value of the received signal of the first cell is less than or equal to a first threshold of the first cell, acquire a second threshold of the second cell from the broadcast message,
  • the second threshold includes at least a sum of a second minimum threshold of the communication parameter of the received signal of the second cell and a first minimum threshold of the communication parameter of the received signal of the second cell, or The difference between the communication parameter value of the received signal of the first cell and the first threshold of the first cell is less than or equal to the first threshold, and the second threshold of the second cell is obtained;
  • the processor is further configured to determine whether a communication parameter value of the received signal of the second cell is greater than a second threshold of the second cell, or a received signal of the second cell Whether the difference between the communication parameter value and the second threshold is greater than the second threshold; the processor is further configured to: if the communication parameter value is greater than the second threshold, or the communication parameter value and The difference between the second threshold is greater than the second threshold, and the second cell is set as a serving cell of the terminal device;
  • the processor is further configured to: if a communication parameter value of the second cell is less than or equal to the second threshold, or a difference between the communication parameter value and the second threshold is less than or equal to the second threshold And determining, according to the high-low relationship between the frequency priority of the first cell and the frequency priority of the second cell, the corresponding parameter selected from the broadcast message to the second cell to determine the second
  • the cell is set as the serving cell of the terminal device, and the corresponding parameter includes at least a hysteresis of the communication parameter of the received signal of the first cell and an offset of the communication parameter of the received signal of the second cell.
  • a receiver configured to receive a broadcast message sent by a base station to which the first cell belongs, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and the receiving of the first cell a hysteresis amount of a communication parameter of the signal, an offset of a communication parameter of the received signal of the second cell, a second threshold value of the second cell, a frequency priority parameter of the first cell, and the At least one of a frequency priority parameter of the second cell and a selected cell level parameter.
  • the receiver is also used to:
  • the detecting of the second broadcast message is repeated until the second broadcast message is detected, and the second broadcast message is received.
  • the terminal device further includes:
  • a transmitter configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity is configured according to the update
  • the message pages the terminal device, and the update message includes at least one of an identifier of the second cell, a hysteresis amount of a communication parameter of the received signal, an offset of a communication parameter of the received signal, and a second threshold.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold value of the received signal strength value
  • the A 1 is an offset of a minimum threshold value of the received signal strength value
  • the C is a compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • a base station including:
  • a processor configured to acquire a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a The offset of the communication parameter of the received signal of the second cell and the second threshold of the second cell, the frequency priority parameter of the first cell, the frequency priority parameter of the second cell, and the selected cell level At least one of the parameters, the second cell is a neighboring cell of the first cell;
  • a transmitter configured to send a broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the processor is specifically configured to:
  • the broadcast message is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the processor is further configured to: The broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the base station further includes: a receiver, configured to receive an update message sent by the terminal device, where the update message includes an identifier of the second cell, At least one of a hysteresis of a communication parameter of the received signal of the first cell, an offset of the communication parameter of the received signal of the second cell, and a second threshold to facilitate transparent transmission of the update message to the mobility management An entity, causing the mobility management entity to page the terminal device according to the update message.
  • a communication system including:
  • a method for selecting a cell is provided, which is applied to a terminal device, and includes:
  • the first cell is a cell capable of providing communication services for the terminal device
  • the first threshold includes at least a first minimum threshold of a communication parameter of the received signal of the first cell and a received signal of the first cell The sum of the offsets of the first minimum threshold of the communication parameters;
  • the second threshold includes at least a first minimum threshold of the communication parameter of the received signal of the first cell, and the a sum of offsets of the second minimum threshold of the communication parameters of the received signal of the first cell, or the second threshold includes at least a second minimum threshold of the communication parameters of the received signal of the first cell and the The sum of the offsets of the first minimum threshold of the communication parameters of the received signal of a cell;
  • the method further includes:
  • the corresponding parameter includes at least an amount of hysteresis of a communication parameter of a received signal of the first cell and an offset of a communication parameter of a received signal of the second cell.
  • the method further includes:
  • the communication parameter value of the second cell is less than or equal to the second threshold, or the difference between the communication parameter value and the second threshold is less than or equal to the second threshold, according to the first Determining, by the broadcast message, a corresponding parameter selected to the second cell to determine that the second cell is set as the terminal device, and a relationship between a frequency priority of the cell and a frequency priority of the second cell
  • the corresponding parameter includes at least an amount of hysteresis of the communication parameter of the received signal of the first cell and an offset of the communication parameter of the received signal of the second cell.
  • the communication parameter value of the received signal of the first cell is measured or the communication parameter value of the received signal of the second cell is measured.
  • the method further includes:
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a communication parameter of the received signal of the first cell.
  • a hysteresis amount an offset of a communication parameter of a received signal of the second cell, a second threshold value of the second cell, and the At least one of a frequency priority parameter of a cell, a frequency priority parameter of the second cell, and a selected cell level parameter.
  • the detection of the broadcast message is repeated until the broadcast message is detected, and the broadcast message is received.
  • the method further includes:
  • the base station sends an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, and the update message includes the second At least one of the identity of the cell, the amount of hysteresis of the communication parameter of the received signal, the offset of the communication parameter of the received signal, and the second threshold.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold value of the received signal strength value
  • the A 1 is an offset of a minimum threshold value of the received signal strength value
  • the C is a compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • the eighth aspect provides a method for selecting a cell, where the method is applied to a base station, including: acquiring a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, and a second minimum threshold of the communication parameter, The amount of hysteresis of the communication parameter of the received signal of a cell, the offset of the communication parameter of the received signal of the second cell, and the At least one of a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter, where the second cell is the first a neighboring cell of the cell;
  • a broadcast message is sent to the terminal device to facilitate selection of the cell by the terminal device based on the broadcast message.
  • the obtaining the broadcast message includes:
  • the broadcast message is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the sending the broadcast message to the terminal device includes:
  • the broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the method further includes:
  • an update message where the update message includes an identifier of the second cell, a hysteresis of a communication parameter of a received signal of the first cell, and a communication parameter of a received signal of the second cell. And at least one of an offset and a second threshold to facilitate transparent transmission of the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • An embodiment of the present invention provides a device, a method, and a system for selecting a cell, where the device for selecting a cell includes: a first measurement unit, configured to measure a communication parameter value of a received signal of the first cell, where the first cell is a cell that can provide a communication service for the terminal device; a first determining unit, configured to determine whether the value of the communication parameter is greater than a first threshold of the first cell, where the first threshold includes at least the first cell a sum of a first minimum threshold of the communication parameter of the received signal and an offset of the first minimum threshold of the communication parameter of the received signal of the first cell; a first obtaining unit, configured to: And obtaining, by the broadcast message, a second threshold, where the second threshold includes at least a first minimum threshold of the communication parameter of the received signal of the first cell, and the first cell, where the value of the signal is less than or equal to the first threshold.
  • the second threshold includes at least a second minimum threshold of the communication parameters of the received signal of the first cell and the first cell The sum of the offsets of the first minimum threshold of the communication parameters of the received signal; the second determining unit, configured to determine whether the communication parameter value is greater than the second threshold; the first setting unit, configured to: if the communication parameter The value is greater than the second threshold, and the first cell is set as a serving cell of the terminal device.
  • the first cell is configured as a serving cell of the terminal device, so that when the terminal device is in an idle state, the measured communication parameter value of the received signal satisfies the requirement of the cell selection, so that the terminal device can perform normal communication.
  • FIG. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of another terminal device according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of another terminal device according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of another method for selecting a cell according to an embodiment of the present invention
  • FIG. 9 is a flowchart of a method for selecting a cell according to an embodiment of the present invention
  • FIG. 10 is a flowchart of another method for selecting a cell according to an embodiment of the present invention
  • FIG. 11 is a flowchart of still another method for selecting a cell according to an embodiment of the present invention
  • FIG. 12 is a flowchart of still another method for selecting a cell according to an embodiment of the present invention.
  • the embodiment of the present invention provides a terminal device.
  • the terminal device selects a cell that can provide communication services for the terminal device in a non-coverage enhanced manner, and assumes that the terminal device detects that the first cell satisfies the requirement for providing communication services for the terminal device. And setting the first cell as the serving cell of the terminal device; if the first cell does not meet the requirement for providing the terminal device with the communication service, the terminal device selects the first cell in a coverage enhancement manner, so that the first cell The cell satisfies the requirement of providing communication services for the terminal device, and the first cell is set as the serving cell of the terminal device.
  • the non-coverage enhancement mode is that the terminal device first measures a communication parameter value of a received signal of a first cell that can provide a communication service for the terminal device, and acquires a first threshold of the first cell, and then determines the communication parameter. Whether the value is greater than the first threshold, and if the communication parameter value is greater than the first threshold, setting the first cell as a serving cell of the terminal device.
  • the communication parameter is a received signal strength or a received signal quality.
  • the first threshold When the communication parameter is the received signal strength, the first threshold includes a first minimum threshold of the received signal strength, and an offset of the first minimum threshold of the received signal strength.
  • the sum of the compensation amounts In practical applications, the first minimum threshold of the received signal strength may be represented by Grxfev , which may be the minimum received signal strength value when the cell is selected, and the offset of the first minimum threshold of the received signal strength may be represented by ⁇ , which may be a cell selection.
  • the above is obtained from the broadcast message sent by the base station to which the cell measured by the terminal device belongs.
  • the measured received signal strength value can be expressed. Therefore, when the received signal strength value measured by the terminal device is greater than the first threshold, the Qrxlevmeas > ( ⁇ r /e min + Qrxlev min offset ) + ⁇ compensation day is set to the terminal device. Service area.
  • the first threshold includes a sum of a first minimum threshold of the received signal quality and an offset of the first minimum threshold of the received signal quality.
  • the first minimum threshold of the received signal quality may be represented by , which may be the minimum received signal quality value when the cell is selected, and the offset of the first minimum threshold of the received signal quality may be represented by 0 o, which may be a cell selection.
  • the measured received signal quality value can be expressed. Therefore, when the received signal quality value measured by the terminal device is greater than the first threshold, when Qqualmeas > [ Qqualmm + Qqualmmoffset ⁇ , the cell set by the terminal device is set to
  • the signal strength value can be received when the first cell is selected, and 5 ⁇ can be selected for the first cell Receive signal quality value.
  • the terminal device can satisfy at least one of S > G and > G , that is, the received signal strength value measured by the terminal device satisfies f ev > G and the received signal quality value measured by the terminal device satisfies at least one of 1 > 0 , The terminal device can then camp on the measured cell.
  • the terminal device When the terminal device performs the cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is the neighboring cell of the first cell, and the terminal device determines whether the value is less than a value.
  • the value is a sum of a received signal strength value of the first cell and a first hysteresis amount of the received signal strength, and the value is a difference between a received signal strength value of the second cell and a first offset of the received signal strength. If the value is less than the value, the first cell is set as the serving cell of the terminal device.
  • the first hysteresis of the received signal strength of the first cell can be expressed, and the first offset of the received signal strength of the second cell can be represented by ⁇ . Said, be
  • J ⁇ and, when >? p is R quasi-'J.
  • the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a first threshold of the first cell is smaller than a first threshold of the first cell, and a communication parameter value of the second cell is related to a second cell Whether the difference between the first thresholds is greater than a first threshold of the second cell.
  • the difference between the communication parameter value of the first cell and the first threshold of the first cell is smaller than the first threshold of the first cell, and the communication parameter value of the second cell is the same as the second cell
  • the difference between a threshold is greater than the first threshold of the second cell.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether the difference between the communication parameter value of the second cell and the first threshold of the second cell is greater than a first threshold of the second cell, if the communication parameter value of the second cell is different from the second cell The difference between the first threshold is greater than the first threshold of the second cell, and the first cell is set as the serving cell of the terminal device.
  • the coverage enhancement mode is that when the received signal communication parameter value of the first cell measured by the terminal device is less than or equal to the first threshold, the terminal device may obtain a second threshold from the local or broadcast message, and determine the reception of the first cell. Whether the communication parameter value of the signal is greater than the second threshold, and if the communication parameter value is greater than the second threshold, The first cell is set as a serving cell of the terminal device.
  • the second threshold When the communication parameter is the received signal strength, the second threshold includes a first minimum threshold of the received signal strength, a sum of the offset of the second minimum threshold of the received signal strength, and a compensation amount, or the second The threshold includes a second minimum threshold of the received signal strength, a sum of the offset of the first minimum threshold of the received signal strength, and a compensation amount.
  • the second minimum threshold of the received signal strength is less than a first minimum threshold of the received signal strength
  • the offset of the second minimum threshold of the received signal strength is less than a first minimum threshold of the received signal strength. Offset. Offset second minimum threshold signal strength may be received by said second minimum received signal strength threshold may be represented by 2 fevmm_ ce.
  • - ⁇ j- is set to the serving cell of the terminal device by using Qrxlevmeas > ⁇ Qrx lev min + Qrxlev min offset _ ce ) + ⁇ compensation ⁇ - ⁇ .
  • the second threshold includes a sum of a first minimum threshold of the received signal quality and an offset of the second minimum threshold of the received signal quality, or the second threshold includes receiving The sum of the second minimum threshold of signal quality and the offset of the first minimum threshold of the received signal quality.
  • the second minimum threshold of the received signal quality is less than a first minimum threshold of the received signal quality
  • the offset of the second minimum threshold of the received signal quality is less than a first minimum threshold of the received signal quality. Offset.
  • the offset of the second minimum threshold of received signal quality may be represented by Qffi", and the second minimum threshold of the received signal quality may be represented by " a nm - ce . Therefore, when the received signal quality value is greater than the second threshold, it can be used
  • Qqualmeas > (Qrqualmm_ce + Qqual mm offset ⁇ indicates that the cell set by the terminal device is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is Received signal strength value and received signal of the first cell The sum of the second hysteresis amounts of the intensities, the 1 being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is less than the value, and if the value is less than the value of 1 , setting the second cell as a serving cell of the terminal device.
  • the second hysteresis of the received signal strength of the first cell can be represented by ⁇ _ ⁇
  • the second hysteresis of the communication parameter is less than a first hysteresis of the communication parameter, and the second offset of the communication parameter is less than a first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the coverage enhancement level needs to be obtained from the broadcast message received by the terminal device, that is, the terminal device selects the level parameter of the cell.
  • Cell level parameters include high coverage enhancement, etc. Level, Medium Coverage Enhancement Level, and Low Coverage Enhancement Level.
  • the coverage enhancement level indicates that after the terminal device camps on a cell that is suitable for providing communication services for the terminal device, when the terminal device performs message interaction with the base station, the communication device may measure the communication parameter value of the received signal of the cell according to the terminal device. Make sure to use a high coverage enhancement level, a medium coverage enhancement level, or a low coverage enhancement level.
  • the high coverage enhancement level may be used.
  • the medium coverage enhancement level or the low coverage enhancement level may be used.
  • the embodiment of the present invention provides a terminal device 10, which is assumed to be used by the terminal device to perform initial cell selection in a manner of enhanced coverage. As shown in FIG. 1, the method includes:
  • the first measuring unit 101 is configured to measure a communication parameter value of the received signal of the first cell, where the first cell is a cell capable of providing a communication service for the terminal device.
  • the communication parameter is a received signal strength or a received signal quality
  • the communication parameter value may be a received signal strength value or a received signal quality value.
  • the first determining unit 102 is configured to determine whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a first minimum threshold of a communication parameter of the received signal of the first cell The sum of the offsets of the first minimum threshold of the communication parameters of the received signal of the first cell.
  • the second threshold is obtained.
  • the terminal device may receive a broadcast message sent by the base station to which the first cell belongs, and obtain a first threshold from the broadcast message.
  • the first threshold includes at least a deviation of a first minimum threshold of the communication parameter from a first minimum threshold of the communication parameter The sum of the shifts.
  • the first threshold is
  • the A is the minimum value of the received signal strength value
  • the A 1 is the offset of the minimum value of the received signal strength value
  • the C is the compensation amount
  • the first threshold is B+B 1
  • the B is the minimum value of the received signal quality value
  • the B 1 is the offset of the minimum value of the received signal quality value.
  • the embodiment of the present invention assumes that the communication parameter value is less than or equal to the first threshold, and acquires a second threshold.
  • the first obtaining unit 103 is configured to: when the communication parameter value is less than or equal to the first threshold, acquire a second threshold from a broadcast message, where the second threshold includes at least a communication parameter of the received signal of the first cell a sum of a first minimum threshold and an offset of a second minimum threshold of a communication parameter of the received signal of the first cell, or the second threshold includes at least a communication parameter of a received signal of the first cell The sum of the second minimum threshold and the offset of the first minimum threshold of the communication parameters of the received signal of the first cell.
  • the second minimum threshold of the communication parameter is less than a first minimum threshold of the communication parameter, and the offset of the second minimum threshold of the communication parameter is less than an offset of the first minimum threshold of the communication parameter.
  • the second threshold is thus smaller than the first threshold, so that the terminal device can set the first cell as the serving cell of the terminal device.
  • the terminal device may repeatedly detect the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • the second determining unit 104 is configured to determine whether the communication parameter value is greater than the second threshold.
  • the second threshold is set as the serving cell of the terminal device.
  • the third threshold is obtained.
  • the embodiment of the present invention assumes that the measured communication parameter value of the received signal of the first cell is greater than the second threshold of the first cell, and sets the first cell as the serving cell of the terminal device.
  • the first setting unit 105 is configured to set the first cell as a serving cell of the terminal device if the communication parameter value is greater than the second threshold.
  • the first cell is configured as a serving cell of the terminal device, so that when the terminal device is in an idle state, the measured communication parameter value of the received signal satisfies the requirement of the cell selection, so that the terminal device can perform normal communication.
  • the received signal strength value measured to the first cell may be represented, and the first minimum threshold of the received signal strength of the first cell may be represented by m, the first cell
  • the received signal strength can be indicated by ⁇ ,
  • the second minimum threshold of the received signal strength of the first cell may be ⁇ -
  • the first cell is set It is the serving cell of the terminal device.
  • ⁇ compensation ⁇ ( ⁇ ⁇ - Pjj Max , 0 )
  • the ⁇ ⁇ is the maximum uplink transmit power of the terminal device allowed by the first cell, and is obtained from the broadcast message, where the maximum uplink determined by the capability of the terminal device Transmit power, said
  • Pcompensation M ⁇ ( ⁇ ) represents taking a maximum value between the first cell terminal allowed maximum uplink transmit power difference between 0 and the maximum uplink transmission power determined by the terminal device capabilities, the shellfish 1 J P d n Is a value greater than or equal to 0.
  • PEMax is greater than ⁇ and Compensation is greater than 0
  • the access range of the terminal device at the cell edge is reduced, and the problem of dropped calls and access failures due to insufficient transmission power of the terminal device is avoided, and when equal to (), the terminal is used.
  • the device can perform cell camping according to the maximum uplink transmit power and access the network.
  • the Qr ⁇ leg The Qr ⁇ leg.
  • f fiet is used as a compensation value of dfevmin only when the terminal device periodically searches for a high priority PLMN (Public Land Mobile Network).
  • PLMN Public Land Mobile Network
  • the RSRP Reference Signal Receiving Power
  • ⁇ rxfev ⁇ is an integer type, which can be
  • is also an integer, and can be any integer from 1 to 8.
  • the compensation amount is Compensation
  • the first threshold is -50+7+0
  • the terminal device obtains the second threshold of the first cell from the broadcast message, and determines whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell.
  • the broadcast message includes the second minimum threshold ⁇ 11 - of the received signal strength of the first cell is -55, the measured received signal strength value of the first cell For -45, the offset ' of the first minimum threshold of the received signal strength of the first cell' is 7, and the compensation amount P - ati . If n is 0, the second threshold is -55 +7+0, and it is determined whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, that is, the measured received signal strength value of the first cell. If the second threshold of the first cell is greater than -45>-55+7+0, the first cell is set as the serving cell of the terminal device.
  • the broadcast message includes the second minimum threshold of the received signal strength of the first cell
  • the offset ⁇ ee is 2
  • the measured received signal strength value of the first cell is ⁇ 45
  • the first cell receives.
  • Qrxlev An is _ 50
  • the compensation amount P P is 0, and the second threshold is - 50 + 2 + 0 , and it is determined whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell, that is, the measured The received signal strength value of the first cell is greater than the second threshold of the first cell
  • the first cell is set as the service cell of the terminal device.
  • the terminal device may also obtain a common offset from the broadcast message, where the common offset may be represented by Q , and the common offset is an enumerated type, which may be taken
  • the first threshold of the first cell is reduced by using a common offset, so as to obtain the second threshold of the first cell, And causing the measured received signal strength value of the first cell to be greater than a second threshold of the first cell, and setting the first cell as a serving cell of the terminal device.
  • the received signal strength value Q "i of the first cell is -45
  • the first minimum threshold d fevmm of the received signal strength of the first cell is -50
  • the first received signal strength of the first cell is The minimum threshold offset '-./ is 7
  • the compensation amount is ()
  • the common offset is 3.
  • the first threshold is - 50 - 3 + 7 + 0, and the measured first cell reception is judged. Whether the signal strength value is greater than a second threshold of the first cell, That is, the measured received signal strength value is greater than the second threshold -45>-50-3+7+0, and the first cell is set as the serving cell of the terminal device.
  • the terminal device may obtain the second minimum threshold value of the received signal strength of the first cell or the second minimum threshold value of the received signal strength directly from the local or broadcast message, and obtain a second threshold of the first cell, determining whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, if the measured received signal strength value of the first cell is greater than a second threshold of the first cell And setting the first cell as a serving cell of the terminal device.
  • the terminal device can quickly select a cell suitable for the terminal device to camp, shorten the time for the terminal device to select the cell, and enable the terminal device to perform normal communication.
  • the embodiment of the present invention provides a terminal device 10. It is assumed that the terminal device according to the second embodiment selects the first cell as the serving cell in a coverage enhancement manner, and reselects the second cell in a non-coverage enhanced manner, as shown in FIG. 2 Show, including:
  • the receiving unit 106 is configured to receive a broadcast message sent by the base station to which the first cell belongs.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a received signal of the second cell. At least one of an offset of the communication parameter, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter.
  • the terminal device may also repeatedly perform detection of the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • the first measuring unit 101 is configured to measure a communication parameter value of the received signal of the first cell, where the first cell is a cell capable of providing a communication service for the terminal device.
  • the detection needs to be the end The cell that provides the communication service by the end device performs cell camping. If the terminal device does not store the information of the cell that can provide the communication service for the terminal device, the terminal device searches for the full frequency band supported by the terminal device, and when the terminal device finds the frequency of the stronger frequency, the terminal device may The cell performs measurements to facilitate the camping of the terminal equipment to the cell.
  • the embodiment of the present invention assumes that after the terminal device performs a full-band search, the first cell is searched, and the first cell is a cell that the terminal device detects that can provide communication services for the terminal device.
  • the terminal device if the terminal device stores information about a cell that can provide communication services for the terminal device, the terminal device first measures the cell, and if the cell can provide a communication service for the terminal device, the terminal device Residing in the cell.
  • the process of performing the full-band search by the terminal device is a prior art, and the embodiment of the present invention does not describe the same.
  • the first determining unit 102 is configured to determine whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a first minimum threshold of a communication parameter of the received signal of the first cell The sum of the offsets of the first minimum threshold of the communication parameters of the received signal of the first cell.
  • the terminal device receives a broadcast message sent by the base station to which the first cell belongs, and the broadcast message includes at least an offset of a first minimum threshold of the communication parameter of the received signal and a first minimum threshold of the communication parameter of the received signal.
  • the first obtaining unit 103 is configured to: when the communication parameter value is less than or equal to the first threshold, acquire a second threshold from a broadcast message, where the second threshold includes at least a communication parameter of the received signal of the first cell a sum of a first minimum threshold and an offset of a second minimum threshold of a communication parameter of the received signal of the first cell, or the second threshold includes at least a communication parameter of a received signal of the first cell The sum of the second minimum threshold and the offset of the first minimum threshold of the communication parameters of the received signal of the first cell.
  • the second minimum threshold of the communication parameter is less than a first minimum threshold of the communication parameter The offset of a minimum threshold. Thereby the second threshold is less than the first threshold.
  • the terminal device may also acquire the offset of the second minimum threshold of the communication parameter or the second minimum threshold of the communication parameter locally.
  • the second determining unit 104 is configured to determine whether the communication parameter value is greater than the second threshold.
  • the first setting unit 105 is configured to set the first cell as a serving cell of the terminal device if the communication parameter value is greater than the second threshold.
  • the second measuring unit 107 is configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell.
  • the first cell When the communication parameter value of the first cell measured by the terminal device is greater than the second threshold of the first cell, the first cell is set as the serving cell of the terminal device, and after the terminal device performs normal communication, the terminal device can continuously measure. a communication parameter value of the first cell and a communication parameter value of the second cell, where the second cell is any neighboring cell of the first cell.
  • a second acquiring unit 108 configured to acquire, by using the broadcast message, a first threshold of the second cell or a first threshold of the second cell, where the first threshold includes at least the second cell a sum of a first minimum threshold of a communication parameter of the received signal and an offset of a first minimum threshold of a communication parameter of the received signal of the second cell;
  • the third determining unit 109 is configured to determine whether the communication parameter value is greater than the first threshold, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold.
  • the second setting unit 1010 is configured to: if the communication parameter value is greater than the first threshold, or the difference between the communication parameter value and the first threshold is greater than the first threshold, the second The cell is set as a serving cell of the terminal device.
  • the terminal device When the terminal device acquires the first threshold of the second cell from the broadcast message, determining that the communication parameter value of the second cell is greater than the first threshold, and setting the second cell to The serving cell of the terminal device.
  • the terminal device obtains the first threshold value of the second cell from the broadcast message, determining that the difference between the communication parameter value of the second cell and the first threshold is greater than the first threshold, The second cell is set as a serving cell of the terminal device.
  • the second setting unit of the terminal device may further set the second cell as the terminal according to the difference between the communication parameter value of the second cell and the first threshold is greater than the second threshold The service cell of the device.
  • the sending unit 101 1 is configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message,
  • the update message includes a first threshold of the identity of the second cell and a communication parameter of the received signal of the second cell or a first threshold of the second cell.
  • the second setting unit 1010 is further configured to: if the communication parameter value is less than or equal to the first threshold, or the difference between the communication parameter value and the first threshold is less than or equal to the first threshold, according to Determining, by the broadcast message, a corresponding parameter selected from the broadcast message to the second cell to determine that the second cell is set to be the relationship between the frequency priority of the first cell and the frequency priority of the second cell.
  • the corresponding parameter includes at least a hysteresis amount of a communication parameter of a received signal of the first cell and an offset quantity of a communication parameter of a received signal of the second cell.
  • the sending unit 101 1 is further configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the update message includes an identifier of the second cell and a corresponding parameter of the second cell acquired according to a second cell frequency priority.
  • the corresponding parameter of the second cell includes at least one of a hysteresis amount of a communication parameter of a received signal of the first cell, an offset of a communication parameter of a received signal of the second cell, and a second threshold value of the second cell.
  • the communication parameter value of the received signal of the first cell is less than or equal to the first threshold of the first cell, by determining the second threshold, determining that the communication parameter value is greater than the second threshold, After the first cell is set as the serving cell of the terminal device, the communication parameter value of the second cell is greater than the first threshold of the second cell, or the communication parameter value of the second cell is different from the first cell A difference between the thresholds is greater than the first threshold, so that the terminal device can reselect to the second cell, and in the case that the terminal device performs normal communication, the communication quality of the terminal device is improved.
  • Embodiment 4 Embodiment 4
  • the embodiment of the present invention provides a terminal device 10, which is configured to measure a communication parameter value of a received signal of a first cell according to the second embodiment, and obtain a first threshold of the first cell, and determine a first cell.
  • the communication parameter value of the received signal is greater than the first threshold of the first cell, that is, the first cell is selected as the serving cell in a non-coverage enhanced manner, and the second cell is reselected in an enhanced manner.
  • the method includes:
  • the receiving unit 106 is configured to receive a broadcast message sent by the base station to which the first cell belongs.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a received signal of the second cell. At least one of an offset of the communication parameter, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter.
  • the terminal device may also repeatedly perform detection of the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • the first setting unit 105 is further configured to: if the communication parameter value of the received signal of the first cell is greater than a first threshold of the first cell, set the first cell as a serving cell of the terminal device.
  • the third measuring unit 1012 is configured to measure a communication parameter value of the received signal of the second cell.
  • the second cell is any neighboring cell of the first cell.
  • the third obtaining unit 1013 is configured to: when the communication parameter value of the received signal of the first cell is less than or equal to the first threshold of the first cell, acquire a second threshold of the second cell from the broadcast message, or And obtaining a second threshold value of the second cell, when a difference between a communication parameter value of the received signal of the first cell and a first threshold of the first cell is less than or equal to a first threshold.
  • the second threshold includes at least a sum of a second minimum threshold of communication parameters of the received signal of the second cell and an offset of a first minimum threshold of communication parameters of the received signal of the second cell.
  • the fourth determining unit 1014 is configured to determine whether a communication parameter value of the received signal of the second cell is greater than a second threshold of the second cell, or a communication parameter value of the received signal of the second cell is Whether the difference between the second thresholds is greater than the second threshold value.
  • the third setting unit 101 5 is configured to: if the communication parameter value is greater than the second threshold, or the difference between the communication parameter value and the second threshold is greater than the second threshold, The second cell is set as a serving cell of the terminal device.
  • the terminal device acquires the second threshold of the second cell from the broadcast message, it is determined that the communication parameter value of the second cell is greater than the second threshold, and the second cell is set as the serving cell of the terminal device.
  • the terminal device acquires the second threshold of the second cell from the broadcast message, determining that the difference between the communication parameter value of the second cell and the second threshold is greater than the second threshold, The second cell is set as a serving cell of the terminal device.
  • the third setting unit of the terminal device may further set the second cell as the terminal according to the difference between the communication parameter value of the second cell and the first threshold is greater than the second threshold.
  • the service cell of the device may further set the second cell as the terminal according to the difference between the communication parameter value of the second cell and the first threshold is greater than the second threshold.
  • the sending unit 101 1 is further configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity And paging the terminal device according to the update message, where the update message includes an identifier of the second cell and a second threshold of a communication parameter of a received signal of the second cell or a second threshold of the second cell.
  • the third setting unit 10 5 is further configured to: if a communication parameter value of the second cell is less than or equal to the second threshold, or a difference between the communication parameter value and the second threshold is less than or equal to a second threshold value, according to a relationship between a frequency priority of the first cell and a frequency priority of the second cell, obtaining, from the broadcast message, a corresponding parameter selected to the second cell to determine
  • the second cell is set as a serving cell of the terminal device, and the corresponding parameter includes at least a delay amount of a communication parameter of a received signal of the first cell and an offset of a communication parameter of a received signal of the second cell. the amount.
  • the sending unit 101 1 is further configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the update message includes an identifier of the second cell and a corresponding parameter of the second cell acquired according to a second cell frequency priority.
  • the second threshold of the second cell is obtained from the broadcast message, and the communication parameter value of the second cell is determined to be greater than the first a second threshold of the second cell, or the difference between the communication parameter value of the second cell and the second threshold is greater than the second threshold, so that the terminal device can reselect to the second cell, where the terminal device performs In the case of normal communication, the communication quality of the terminal device is improved.
  • An embodiment of the present invention provides a terminal device, where a terminal device is reselected to a first cell. If the neighboring cell, that is, the second cell capable of providing communication service for the terminal device, if the communication parameter value of the second cell is less than or equal to the first threshold of the second cell, the terminal device needs to use the carrier frequency of the second cell. Determining a priority relationship between the priority and the carrier frequency of the first cell, obtaining a corresponding parameter selected from the broadcast message to the second cell, and selecting a different measurement initiation rule to determine that the second cell is set to The serving cell of the terminal device is configured to enable the terminal device to perform normal communication.
  • the carrier frequency priority of the cell is configured in the base station, and the carrier frequency priority of the cell of the terminal device is notified by the base station transmitting the broadcast message to the terminal device, where the broadcast message carries the carrier frequency priority of the cell.
  • the cell frequency priority of the cell may be represented by a cellReselectionPriority, and the carrier frequency priority of the cell ranges from 0 to 7.
  • the value of the carrier frequency priority of the cell is larger, indicating that the carrier frequency is on the corresponding carrier frequency.
  • the reselection priority of all cells is higher.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is The sum of the received signal strength value of the first cell and the second hysteresis of the received signal strength, the value being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. And determining whether the value is smaller than the R “i value, and if the value is less than the value of 1 , setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameter of the first cell may be expressed, and the first offset of the communication parameter of the second cell may be represented by ⁇ , then
  • the second hysteresis of the received signal strength of the first cell may be represented by ⁇
  • the second offset of the received signal strength of the second cell may be represented by Q
  • the second hysteresis amount of the communication parameter is smaller than the first hysteresis amount of the communication parameter, and the communication parameter The second offset of the number is less than the first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the terminal device when the terminal device reselects to the neighboring cell of the first cell, that is, the second cell that can provide the communication service for the terminal device, when the communication parameter value of the first cell is less than or equal to the first cell of the second cell. a threshold value, the communication parameter value of the second cell is less than or equal to a second threshold of the second cell, and the terminal device needs to be based on a relationship between a carrier frequency priority of the second cell and a carrier frequency priority of the first cell, Obtaining a corresponding parameter selected to the second cell in the broadcast message, and selecting a different measurement initiation rule to determine that the second cell is set as a serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is Received signal strength value and received signal of the first cell The sum of the second hysteresis amounts of the intensities, the 1 being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is less than the value, and if the value is less than the value of 1 , setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameter of the first cell may be expressed, and the first offset of the communication parameter of the second cell may be represented by ⁇ , then
  • the second hysteresis of the received signal strength of the first cell may be represented by ⁇
  • the second offset of the received signal strength of the second cell may be represented by Q ' ⁇
  • the second hysteresis of the communication parameter is less than a first hysteresis of the communication parameter, and the second offset of the communication parameter is less than a first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, The second cell is set as a serving cell of the terminal device.
  • the terminal device selects the first cell in the coverage enhancement mode and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is weak to a place where the received signal is strong, The receiving signal of the second cell is strong, and the terminal device reselects to the second cell in a non-coverage enhanced manner, but when the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, The received signal of the second cell is also weak, and the value of the communication parameter of the received signal measured by the terminal device cannot meet the S criterion, and the terminal device determines the frequency priority of the first cell and the frequency priority of the second cell.
  • the method performs cell reselection.
  • the terminal device selects the first cell in a non-coverage enhanced manner and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, there is a The receiving signal of the second cell is weak, and the terminal device reselects the second cell to the second cell.
  • the priority of the terminal device may be that the frequency priority of the first cell is lower than the frequency priority of the second cell.
  • the terminal device may also perform cell reselection by determining the frequency priority of the first cell and the frequency priority of the second cell.
  • the terminal device when the terminal device selects the second cell in a non-coverage enhanced manner and sets the second cell as the serving cell of the terminal device, when the communication parameter value of the second cell is less than or equal to the second cell
  • a threshold when the terminal device selects the second cell in the coverage enhancement manner and sets the second cell as the serving cell of the terminal device, when the communication parameter value of the first cell is less than or equal to the second cell
  • the terminal device may be based on the carrier frequency priority of the second cell and the carrier frequency priority of the first cell. Obtaining a corresponding parameter selected from the broadcast message to the second cell, and selecting a different measurement initiation rule, to determine that the second cell is set as a serving cell of the terminal device, so that the terminal device is normal. Communication.
  • the embodiment of the present invention provides a base station 20, as shown in FIG. 4, including:
  • the obtaining unit 201 is configured to acquire a broadcast message.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a communication parameter of the received signal of the second cell. At least one of an offset and a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter, the second The cell is a neighboring cell of the first cell.
  • the sending unit 202 is configured to send a broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the obtaining unit 201 is specifically configured to:
  • the cell information is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the sending unit 202 is further configured to:
  • the broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the base station 20 further includes:
  • the receiving unit 203 is configured to receive an update message sent by the terminal device.
  • the update message includes an identifier of the second cell, a hysteresis amount of a communication parameter of a received signal of the first cell, an offset of a communication parameter of a received signal of the second cell, and a second threshold value. At least one, in order to transparently transmit the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • the base station sends the broadcast message to the terminal device by acquiring a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a reception of the first cell.
  • Hysteresis of the communication parameters of the signal The amount, the offset of the communication parameter of the received signal of the second cell, the second threshold of the second cell, the frequency priority parameter of the first cell, and the frequency priority parameter of the second cell Selecting at least one of the cell level parameters, where the second cell is a neighboring cell of the first cell, so that the terminal device selects a cell according to the broadcast message, so that the terminal device can perform normal communication, and receive the And an update message sent by the terminal device, so as to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the embodiment of the present invention provides a communication system 30, as shown in FIG. 5, including: a terminal device 301 and a base station 302.
  • the terminal device 301 performs initial cell selection in a coverage enhancement manner, and is used to measure a communication parameter value of a received signal of the first cell, where the first cell is a cell capable of providing communication services for the terminal device; Whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a communication between a first minimum threshold of a communication parameter of the received signal of the first cell and a received signal of the first cell a sum of offsets of the first minimum threshold of the parameter; if the communication parameter value is less than or equal to the first threshold, acquiring a second threshold from the broadcast message, where the second threshold includes at least the first cell a sum of a first minimum threshold of the communication parameter of the received signal and an offset of a second minimum threshold of the communication parameter of the received signal of the first cell, or the second threshold includes at least the reception of the first cell The sum of the second minimum threshold of the communication parameter of the signal and the offset of the first minimum threshold of the communication parameter of the received signal of the first cell; S
  • the terminal device 301 performs initial cell selection based on coverage enhancement, reselecting the second cell in a non-coverage enhanced manner, for using the first small
  • measuring a communication parameter value of the received signal of the second cell where the second cell is any neighboring cell of the first cell
  • the first threshold includes at least a first minimum threshold of a communication parameter of the received signal of the second cell and the second cell a sum of offsets of the first minimum threshold of the communication parameters of the received signal
  • the terminal device 301 determines the communication parameter value of the received signal of the first cell based on the terminal device 301, and acquires the first threshold of the first cell, and determines that the communication parameter value of the received signal of the first cell is greater than that of the first cell.
  • a first threshold that is, the first cell is selected as the serving cell in a non-coverage enhanced manner, and the second cell is reselected in an enhanced manner, where it is determined whether the communication parameter value is greater than a first threshold of the first cell after that,
  • a communication parameter value of the received signal of the second cell where the second cell is any neighboring cell of the first cell; when a communication parameter value of the received signal of the first cell is less than or equal to the first cell First threshold, obtained from the broadcast message a second threshold of the second cell, where the second threshold includes at least a second minimum threshold of a communication parameter of the received signal of the second cell and a first minimum threshold of a communication parameter of the received signal of the second cell a sum of the shifts, or, when the difference between the communication parameter value of the received signal of the first cell and the first threshold of the first cell is less than or equal to the first threshold, acquiring the second threshold of the second cell value;
  • the communication parameter value of the second cell is less than or equal to the second threshold, or the difference between the communication parameter value and the second threshold is less than or equal to the second threshold, according to the first Determining, by the broadcast message, a corresponding parameter selected to the second cell to determine that the second cell is set as the terminal device, and a relationship between a frequency priority of the cell and a frequency priority of the second cell
  • the corresponding parameter includes at least an amount of hysteresis of the communication parameter of the received signal of the first cell and an offset of the communication parameter of the received signal of the second cell.
  • the terminal device needs to first receive a broadcast message sent by the base station to which the first cell belongs, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a received signal of the first cell. Hysteresis of the communication parameter, the offset of the communication parameter of the received signal of the second cell, the second threshold of the second cell, the frequency priority parameter of the first cell, the second At least one of a frequency priority parameter of the cell and a selected cell level parameter.
  • the terminal device may also repeatedly perform the detection of the broadcast message until The broadcast message is detected, and the broadcast message is received.
  • the terminal device needs to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, where the update message includes At least one of an identifier of the second cell, a hysteresis amount of the communication parameter of the received signal, an offset of the communication parameter of the received signal, and a second threshold value.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold value of the received signal strength value
  • the A 1 is an offset of a minimum threshold value of the received signal strength value
  • the C is a compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • the base station 302 is configured to acquire a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, An offset of a communication parameter of the received signal of the second cell, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell At least one of the level parameters, the second cell is a neighboring cell of the first cell; and sending a broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, An offset of a communication parameter of the received signal of the second cell, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the
  • the base station may obtain the broadcast message from a request message, a response message, or an update message sent by the local base station or the second base station to the first base station.
  • the base station may repeatedly transmit the broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the terminal device After the sending the broadcast message to the terminal device, Receiving, by the terminal device, an update message, where the update message includes an identifier of the second cell, a hysteresis of a communication parameter of a received signal of the first cell, and a communication parameter of a received signal of the second cell. And at least one of an offset and a second threshold to facilitate transparent transmission of the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • the update message includes an identifier of the second cell, a hysteresis of a communication parameter of a received signal of the first cell, and a communication parameter of a received signal of the second cell.
  • At least one of an offset and a second threshold to facilitate transparent transmission of the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • the embodiment of the present invention provides a terminal device 40, as shown in FIG. 6, including: a processor 401, configured to measure a communication parameter value of a received signal of a first cell, where the first cell is capable of providing the terminal device The cell of the communication service.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is A+A 1 +C , where A is a minimum threshold of the received signal strength value, and the A 1 is a minimum threshold of the received signal strength value.
  • the amount of shift, the C is a compensation amount;
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • the processor 401 is further configured to determine whether the communication parameter value is greater than a first threshold of the first cell.
  • the first threshold includes at least a sum of a first minimum threshold of a communication parameter of a received signal of the first cell and an offset of a first minimum threshold of a communication parameter of a received signal of the first cell.
  • the first minimum threshold of the communication parameter of the received signal of the first cell and the first minimum threshold of the communication parameter of the received signal of the first cell may be acquired locally or may be sent from the base station to which the first cell belongs. Obtained in the broadcast message.
  • the processor 401 is further configured to: acquire the second threshold from the broadcast message if the communication parameter value is less than or equal to the first threshold.
  • the second threshold includes at least a sum of a first minimum threshold of a communication parameter of the received signal of the first cell and a second minimum threshold of a communication parameter of the received signal of the first cell, or
  • the second threshold includes at least a sum of a second minimum threshold of a communication parameter of the received signal of the first cell and an offset of a first minimum threshold of a communication parameter of the received signal of the first cell.
  • the processor 401 is further configured to determine whether the communication parameter value is greater than the second threshold.
  • the processor 401 is further configured to: if the communication parameter value is greater than the second threshold, set the first cell as a serving cell of the terminal device.
  • the first cell is configured as a serving cell of the terminal device, so that when the terminal device is in an idle state, the measured communication parameter value of the received signal satisfies the requirement of the cell selection, so that the terminal device can perform normal communication.
  • the processor 401 is further configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell;
  • the processor 401 is further configured to acquire, from the broadcast message, a first threshold of the second cell or a first threshold of the second cell.
  • the first threshold includes at least a sum of a first minimum threshold of a communication parameter of a received signal of the second cell and a first minimum threshold of a communication parameter of a received signal of the second cell.
  • the processor 401 is further configured to determine whether the communication parameter value is greater than the first threshold, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold.
  • the processor 401 is further configured to: if the communication parameter value is greater than the first threshold, or the difference between the communication parameter value and the first threshold is greater than the first threshold, the second The cell is set as a serving cell of the terminal device.
  • the processor 40 is further configured to: if the communication parameter value is less than or equal to the first threshold, or the difference between the communication parameter value and the first threshold is less than or equal to the first threshold, Determining, according to a high frequency relationship between a frequency priority of the first cell and a frequency priority of the second cell, a corresponding parameter selected from the broadcast message to the second cell to determine to set the second cell
  • the corresponding parameter includes at least a delay amount of a communication parameter of a received signal of the first cell and an offset amount of a communication parameter of a received signal of the second cell.
  • the second threshold determines that the communication parameter value is greater than the second threshold.
  • the communication parameter value of the second cell is greater than the first threshold of the second cell, or the communication parameter value of the second cell is different from the first cell
  • a difference between the thresholds is greater than the first threshold, so that the terminal device can reselect to the second cell, and in the case that the terminal device performs normal communication, the communication quality of the terminal device is improved.
  • the received signal strength value measured to the first cell may be represented, and the first minimum threshold of the received signal strength of the first cell may be represented by m, the first cell
  • the offset of the first minimum threshold of the received signal strength can be expressed, and the compensation amount can be used.
  • the "threshold value can be indicated by ( ⁇ r fevmin + Qrxlevmmoffset) + ⁇ compensation, then the measured received signal of the first cell The intensity value is less than or equal to the first threshold, ie
  • the second minimum threshold of the received signal strength of the first cell may be ⁇ -
  • Qrxlevmeas > ( Qrxlev mn_ ce + Qrxlev m offset ) + ⁇ compensation is the serving cell of the terminal device.
  • ⁇ compensation ⁇ MaX P EUax _ [/ ⁇ . ⁇ , 0)
  • the ⁇ ⁇ ⁇ ⁇ is the maximum uplink transmit power of the terminal device allowed by the cell
  • the P EM is obtained from the broadcast message, where the terminal device ability to determine the maximum uplink transmission power, and takes a maximum value denotes the cell between a first terminal device allowed maximum uplink transmission power difference between the 0 and the maximum uplink transmission power determined by the terminal device capabilities
  • the shellfish 1 J ⁇ , ⁇ " is a value greater than or equal to 0.
  • the terminal device may be a cell that resides at the maximum uplink transmit power, an access network.
  • the leg Qr ⁇ .f fiet only periodically high priority PLMN search in the terminal device (In the case of Public Land Mobile Network, public land mobile network), it is used as a compensation value of dfevmin.
  • the Qrd is measured by the terminal equipment.
  • the actual value of the RSRP (Reference Signal Receiving Power) of the first cell is measured.
  • is an integer type, which can be
  • an integer type which can be any integer from 1 to 8.
  • the first threshold is -50+7+0
  • the terminal device obtains the second threshold of the first cell from the broadcast message, and determines whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell.
  • the broadcast message includes the second most received signal strength of the first cell
  • the small threshold ⁇ n- is -55
  • the measured received signal strength value of the first cell is -45
  • the first minimum threshold of the received signal strength of the first cell is offset.
  • the first cell 7 is a compensation amount ⁇ , where is 0, and the second threshold is -55 +7+0, determining whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, that is, the measured If the received signal strength value of a cell is greater than the second threshold of the first cell -45>-55+7+0, the first cell is set as the serving cell of the terminal device.
  • Qrxlevv ⁇ n 50, the compensation amount is 0, and the second threshold is -50 + 2 + 0, and it is determined whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell, that is, the measured The received signal strength value of a cell is greater than the second threshold of the first cell
  • the terminal device may also obtain a common offset from the broadcast message, where the common offset may be represented by Q , and the common offset Qffi et is an enumerated type, which may be taken
  • the first threshold of the first cell is reduced by using the common offset, so as to obtain the second threshold of the first cell.
  • the measured received signal strength value of the first cell is greater than the second threshold of the first cell, and the first cell is set as the serving cell of the terminal device.
  • the measured received signal strength value Q "i of the first cell is -45
  • the first minimum threshold d fevmm of the received signal strength of the first cell is -50
  • the received signal strength of the first cell is A minimum threshold offset of 0 is 7
  • the common offset Q ff Set is 3
  • the first threshold is - 50 - 3 + 7 + 0
  • the first A cell is set as a serving cell of the terminal device.
  • the terminal device may obtain the second minimum threshold value of the received signal strength of the first cell or the second minimum threshold value of the received signal strength directly from the local or broadcast message, and obtain a second threshold of the first cell, determining whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, if the measured received signal strength value of the first cell is greater than a second threshold of the first cell And setting the first cell as a serving cell of the terminal device.
  • the terminal device can quickly select a cell suitable for the terminal device to camp, shorten the time for the terminal device to select the cell, and enable the terminal device to perform normal communication.
  • the processor 401 is further configured to: if the communication parameter value of the received signal of the first cell is greater than a first threshold of the first cell, set the first cell as a serving cell of the terminal device.
  • the processor 401 is further configured to measure a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell.
  • the processor 401 is further configured to: when a communication parameter value of the received signal of the first cell is less than or equal to a first threshold of the first cell, acquire a second threshold of the second cell from the broadcast message, where The second threshold includes at least a sum of a second minimum threshold of a communication parameter of the received signal of the second cell and a first minimum threshold of a communication parameter of the received signal of the second cell, or The difference between the communication parameter value of the received signal of the first cell and the first threshold of the first cell is less than or equal to the first threshold, and the second threshold of the second cell is obtained.
  • the processor 401 is further configured to determine whether a communication parameter value of the received signal of the second cell is greater than a second threshold of the second cell, or a communication parameter value of the received signal of the second cell is Whether the difference between the second thresholds is greater than the second threshold value.
  • the processor 401 is further configured to: if the communication parameter value is greater than the second threshold, Or, the difference between the communication parameter value and the second threshold is greater than the second threshold, and the second cell is set as a serving cell of the terminal device.
  • the processor 401 is further configured to: if a communication parameter value of the second cell is less than or equal to the second threshold, or a difference between the communication parameter value and the second threshold is less than or equal to the second door a limit value, according to a relationship between a frequency priority of the first cell and a frequency priority of the second cell, obtaining, from the broadcast message, a corresponding parameter selected to the second cell to determine the first
  • the second cell is set as the serving cell of the terminal device, and the corresponding parameter includes at least a delay amount of a communication parameter of the received signal of the first cell and an offset quantity of a communication parameter of the received signal of the second cell.
  • the second threshold of the second cell is obtained from the broadcast message, and the communication parameter value of the second cell is determined to be greater than the first a second threshold of the second cell, or the difference between the communication parameter value of the second cell and the second threshold is greater than the second threshold, so that the terminal device can reselect to the second cell, where the terminal device performs In the case of normal communication, the communication quality of the terminal device is improved.
  • the terminal device 40 further includes:
  • the receiver 402 is configured to receive a broadcast message sent by the base station to which the first cell belongs.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a received signal of the second cell. At least one of an offset of the communication parameter, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter.
  • the receiver 402 is also used to:
  • the detecting of the second broadcast message is repeated until the second broadcast message is detected, and the second broadcast message is received.
  • the terminal device 40 further includes:
  • the transmitter 403 is configured to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the update message includes at least one of an identifier of the second cell, a hysteresis amount of a communication parameter of the received signal, an offset of a communication parameter of the received signal, and a second threshold.
  • the embodiment of the present invention provides a terminal device, when the terminal device reselects to the neighboring cell of the first cell, that is, the second cell capable of providing communication service for the terminal device, if the communication parameter value of the second cell is less than or equal to Determining, by the first threshold of the second cell, the terminal device needs to obtain, according to the relationship between the carrier frequency priority of the second cell and the carrier frequency priority of the first cell, the corresponding selection from the broadcast message to the second cell. Parameter, selecting different measurement initiation rules, to determine that the second cell is set as the serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the carrier frequency priority of the cell is configured in the base station, and the carrier frequency priority of the cell of the terminal device is notified by the base station transmitting the broadcast message to the terminal device, where the broadcast message carries the carrier frequency priority of the cell.
  • the cell frequency priority of the cell may be represented by a cellReselectionPriority, and the carrier frequency priority of the cell ranges from 0 to 7.
  • the value of the carrier frequency priority of the cell is larger, indicating that the carrier frequency is on the corresponding carrier frequency.
  • the reselection priority of all cells is higher.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is The sum of the received signal strength value of the first cell and the second hysteresis of the received signal strength, the value being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is less than the stated value a value, if the value is less than the value, setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameters of the first cell may be represented, and the first offset of the communication parameters of the second cell may be ⁇ . / means, then
  • the second hysteresis of the received signal strength of the first cell may be represented by ⁇
  • the second offset of the received signal strength of the second cell may be represented by Q ' ⁇
  • the second hysteresis of the communication parameter is less than the number of the communication parameters A hysteresis amount, the second offset of the communication parameter being less than the first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the terminal device when the terminal device is reselected to the neighboring cell of the first cell, the terminal can be the terminal.
  • the device provides the second cell of the communication service, when the communication parameter value of the first cell is less than or equal to the first threshold of the second cell, the communication parameter value of the second cell is less than or equal to the second threshold of the second cell.
  • the terminal device needs to obtain a corresponding parameter selected from the broadcast message to the second cell according to the carrier frequency priority of the second cell and the carrier frequency priority of the first cell, and select different measurement start rules. And determining to set the second cell as a serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is The sum of the received signal strength value of the first cell and the second hysteresis of the received signal strength, the value being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is less than the value, and if the value is less than the value of 1 , setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameter of the first cell may be represented, and the first offset of the communication parameter of the second cell may be used by 2 . / means, then
  • the second hysteresis of the received signal strength of the first cell may be represented by ⁇
  • the second offset of the received signal strength of the second cell may be represented by Q ' ⁇
  • the second hysteresis of the communication parameter is less than a first hysteresis of the communication parameter, and the second offset of the communication parameter is less than a first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and the second Whether the difference between the second thresholds of the cells is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the terminal device selects the first cell in the coverage enhancement mode and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is weak to a place where the received signal is strong, The receiving signal of the second cell is strong, and the terminal device reselects to the second cell in a non-coverage enhanced manner, but when the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, The received signal of the second cell is also weak, and the value of the communication parameter of the received signal measured by the terminal device cannot meet the S criterion, and the terminal device determines the frequency priority of the first cell and the frequency priority of the second cell.
  • the method performs cell reselection.
  • the terminal device selects the first cell in a non-coverage enhanced manner and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, there is a The receiving signal of the second cell is weak, and the terminal device reselects the second cell to the second cell.
  • the priority of the terminal device may be that the frequency priority of the first cell is lower than the frequency priority of the second cell.
  • the terminal device may also perform cell reselection by determining the frequency priority of the first cell and the frequency priority of the second cell.
  • the terminal device may obtain the corresponding parameter selected from the broadcast message to the second cell according to the carrier frequency priority of the second cell and the carrier frequency priority of the first cell, and select Different measurement initiation rules are used to determine that the second cell is set as the serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the embodiment of the present invention provides a base station 50, as shown in FIG. 7, including:
  • the processor 501 is configured to acquire a broadcast message.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and an offset of the communication parameter of the received signal of the second cell. And at least one of a second threshold value of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter, where the second cell is a neighboring cell of the first cell.
  • the transmitter 502 is configured to send a broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the processor 501 is specifically configured to:
  • the cell information is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the processor 501 is further configured to:
  • the broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • the base station 50 further includes:
  • the receiver 503 is configured to receive an update message sent by the terminal device.
  • the update message includes an identifier of the second cell, a hysteresis amount of a communication parameter of a received signal of the first cell, an offset of a communication parameter of a received signal of the second cell, and a second threshold value. At least one, in order to transparently transmit the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • the base station sends the broadcast message to the terminal device by acquiring a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a reception of the first cell.
  • the amount of hysteresis of the communication parameter of the signal, the offset of the communication parameter of the received signal of the second cell, the second threshold of the second cell, the frequency priority parameter of the first cell, and the second cell At least one of a frequency priority parameter and a selected cell level parameter, wherein the second cell is a neighboring cell of the first cell, so that the terminal device selects a cell according to the broadcast message, so that the terminal device can perform Normally communicating, and receiving an update message sent by the terminal device, so as to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the embodiment of the present invention provides a communication system 60, as shown in FIG. 8, including: a terminal device 601 and a base station 602.
  • the terminal device 601 performs initial cell selection in a coverage enhancement manner, and is used to measure a communication parameter value of a received signal of the first cell, where the first cell is a cell capable of providing communication services for the terminal device; Whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a communication between a first minimum threshold of a communication parameter of the received signal of the first cell and a received signal of the first cell The sum of the offsets of the first minimum threshold of the parameter; if the communication parameter value is less than Or equal to the first threshold, acquiring a second threshold from a broadcast message, where the second threshold includes at least a first minimum threshold of a communication parameter of the received signal of the first cell and a received signal of the first cell a sum of offsets of the second minimum threshold of the communication parameter, or the second threshold includes at least communication of a second minimum threshold of the communication parameters of the received signal of the first cell with a received signal of the first cell a sum of offsets of the first minimum threshold of
  • the terminal device 601 performs initial cell selection in a manner of coverage enhancement, and reselects the second cell in a non-coverage enhanced manner, after the setting the first cell as the serving cell of the terminal device. And measuring a communication parameter value of the received signal of the second cell, where the second cell is any neighboring cell of the first cell, and acquiring, by using the broadcast message, a first threshold of the second cell or the first a first threshold of the second cell, where the first threshold includes at least a first minimum threshold of a communication parameter of the received signal of the second cell and a first minimum threshold of a communication parameter of the received signal of the second cell a sum of offsets; determining whether the communication parameter value is greater than the first threshold, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold; if the communication parameter The value is greater than the first threshold, or the difference between the communication parameter value and the first threshold is greater than the first threshold, and the second cell is set as the service of the terminal device.
  • the communication parameter value is less than or equal to the first threshold, or the difference between the communication parameter value and the first threshold is less than or equal to the first threshold, according to the first cell
  • the corresponding parameter includes at least a hysteresis amount of a communication parameter of the received signal of the first cell and an offset quantity of a communication parameter of the received signal of the second cell.
  • the terminal device 601 measures the connection of the first cell based on the terminal device 601. Receiving the communication parameter value of the signal, and acquiring the first threshold of the first cell, determining that the communication parameter value of the received signal of the first cell is greater than the first threshold of the first cell, that is, selecting the first cell by using a non-coverage enhanced manner a serving cell, reselecting the second cell in an enhanced manner, after determining whether the communication parameter value is greater than a first threshold of the first cell,
  • the communication parameter value of the second cell is less than or equal to the second threshold, or the difference between the communication parameter value and the second threshold is less than or equal to the second threshold, according to the first Determining, by the broadcast message, a corresponding parameter selected to the second cell to determine that the second cell is set as the terminal device, and a relationship between a frequency priority of the cell and a frequency priority of the second cell
  • the serving cell, the corresponding parameter includes at least a hysteresis amount of the communication parameter of the received signal of the first cell, and the The offset of the communication parameters of the received signals of the two cells.
  • the terminal device needs to first receive a broadcast message sent by the base station to which the first cell belongs, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a received signal of the first cell. Hysteresis of the communication parameter, the offset of the communication parameter of the received signal of the second cell, the second threshold of the second cell, the frequency priority parameter of the first cell, the second At least one of a frequency priority parameter of the cell and a selected cell level parameter.
  • the terminal device may also repeatedly perform the detection of the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • the terminal device needs to send an update message to the base station, so that the base station transparently transmits the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, where the update message includes At least one of an identifier of the second cell, a hysteresis amount of the communication parameter of the received signal, an offset of the communication parameter of the received signal, and a second threshold value.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold value of the received signal strength value
  • the A 1 is an offset of a minimum threshold value of the received signal strength value
  • the C is a compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • the base station 602 is configured to acquire a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a first small The amount of hysteresis of the communication parameter of the received signal of the zone, the offset of the communication parameter of the received signal of the second cell, and the second threshold of the second cell, the frequency priority parameter of the first cell, At least one of a frequency priority parameter and a selected cell level parameter of the second cell, where the second cell is a neighboring cell of the first cell; sending a broadcast message to the terminal device, so that the terminal device is configured according to the broadcast message Select a cell.
  • the base station may obtain the broadcast message from a request message, a response message, or an update message sent by the local base station or the second base station to the first base station.
  • the base station may repeatedly transmit the broadcast message to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • an update message where the update message includes an identifier of the second cell, a hysteresis of a communication parameter of a received signal of the first cell, and a communication parameter of a received signal of the second cell. And at least one of an offset and a second threshold to facilitate transparent transmission of the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • a method for selecting a cell is applied to a terminal device, and assuming that the terminal device performs initial cell selection in a coverage enhancement manner, the method includes the following steps: Step 701: Measure a communication parameter of a received signal of a first cell.
  • the first cell is a cell capable of providing communication services for the terminal device.
  • the terminal device Before the terminal device measures the communication parameter value of the received signal of the first cell, when the terminal device is powered on or enters the signal coverage area from the blind spot, it is required to detect a cell that can provide communication service for the terminal device, and perform cell camping. If the terminal device does not store the information of the cell that can provide the communication service for the terminal device, the terminal device searches for the full frequency band supported by the terminal device, and when the terminal device finds the frequency of the stronger frequency, the terminal device may The cell performs measurements to facilitate the terminal device to camp on the small Area.
  • the embodiment of the present invention assumes that after the terminal device performs a full-band search, the first cell is searched, and the first cell is a cell that the terminal device detects that can provide communication services for the terminal device.
  • the terminal device if the terminal device stores information about a cell that can provide communication services for the terminal device, the terminal device first measures the cell, and if the cell can provide a communication service for the terminal device, the terminal device Residing in the cell.
  • the process of performing the full-band search by the terminal device is a prior art, and the embodiment of the present invention does not describe the same.
  • the communication parameter is a received signal strength or a received signal quality
  • the first threshold is
  • the A is a minimum threshold value of the received signal strength value
  • the A 1 is an offset of a minimum threshold value of the received signal strength value
  • the C is a compensation amount
  • the first threshold is B+B 1
  • the B is a minimum threshold of the received signal quality value
  • the B 1 is an offset of the minimum threshold of the received signal quality value.
  • Step 702 Determine whether the communication parameter value is greater than a first threshold of the first cell, where the first threshold includes at least a first minimum threshold of a communication parameter of a received signal of the first cell, and the first cell The sum of the offsets of the first minimum threshold of the communication parameters of the received signal.
  • the terminal device receives the broadcast message sent by the base station to which the first cell belongs, and obtains, from the broadcast message, a first minimum threshold of the communication parameter of the received signal of the first cell and a first minimum threshold of the communication parameter of the received signal.
  • the offset is the offset.
  • the terminal device may continue to search for other cells in the full frequency band, and when searching for the cell, the terminal device may The cell performs measurement to determine whether the measured communication parameter value of the received signal is greater than a threshold of the cell, and if the searched communication parameter value of the received signal of the cell is less than or equal to the small value
  • the threshold of the zone and after searching and judging, there is no cell capable of providing communication services for the terminal device, and the measured communication parameter values of the received signals of each cell are sorted in descending order, and then adjusted.
  • the threshold of the highest cell of the communication parameter of the received signal is such that the measured received signal communication parameter is greater than the threshold of the cell.
  • step 703 if the communication parameter value is less than or equal to the first threshold, step 703 is performed.
  • Step 703 If the communication parameter value is less than or equal to the first threshold, obtain a second threshold from a broadcast message, where the second threshold includes at least a first minimum threshold of a communication parameter of the received signal of the first cell. a sum of an offset of a second minimum threshold of a communication parameter of the received signal of the first cell, or the second threshold includes at least a second minimum threshold of a communication parameter of the received signal of the first cell The sum of the offsets of the first minimum threshold of the communication parameters of the received signal of the first cell
  • the second minimum threshold of the communication parameter of the first cell or the offset of the second minimum threshold of the communication parameter of the first cell may also be obtained locally.
  • the terminal device can repeatedly detect the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • the second threshold When the broadcast message includes a second minimum threshold of the received signal strength, the second threshold includes a second minimum threshold of the received signal strength, an offset of the first minimum threshold of the received signal strength, and a compensation amount with.
  • the second threshold When the broadcast message includes an offset of a second minimum threshold of the received signal strength, the second threshold includes a first minimum threshold of the received signal strength, an offset of the second minimum threshold of the received signal strength, and The sum of the compensation amounts.
  • the second minimum threshold of the received signal strength is less than a first minimum threshold of the received signal strength
  • the offset of the second minimum threshold of the received signal strength is less than an offset of the first minimum threshold of the received signal strength.
  • Step 704 Determine whether the communication parameter value is greater than the second threshold.
  • the second minimum threshold of the communication parameter of the first cell is smaller than the first minimum threshold of the communication parameter, and the offset of the second minimum threshold of the communication parameter is smaller than the The offset of the first minimum threshold of the parameter. Therefore, the second threshold of the first cell is smaller than the first threshold of the first cell.
  • step 705 is performed.
  • step 705 if the communication parameter value is greater than the second threshold, step 705 is performed.
  • Step 705 If the communication parameter value is greater than the second threshold, set the first cell as a serving cell of the terminal device.
  • the communication parameter value of the received signal of the second cell is measured, and the communication parameter value of the received signal of the first cell is continuously monitored, where the second cell is Any one of the neighboring cells of the first cell. Determining, by the first message, the first minimum threshold of the communication parameter of the second cell or the first minimum threshold of the communication parameter, determining whether the communication parameter value of the second cell is greater than the second a first threshold of the cell, if the communication parameter value is greater than the first threshold, setting the second cell as a serving cell of the terminal device.
  • the terminal device selects a corresponding reselected cell To select a cell that is suitable for the terminal device to camp on.
  • the communication parameter may also be the received signal quality
  • the terminal device may also measure the received signal quality value of the first cell, and obtain a first minimum threshold of the received signal quality and a first minimum of the received signal quality from the broadcast message.
  • the offset of the threshold may further obtain an offset of the second minimum threshold of the received signal quality or the second minimum threshold of the received signal quality from the broadcast message, and determine whether the measured received signal quality value of the first cell is greater than the received value.
  • a communication service is provided for the terminal device.
  • the terminal device may also measure the received signal strength value and the received signal quality value, when the measured received signal strength value is greater than a minimum threshold of the received signal strength obtained from the broadcast message, and a minimum threshold of the received signal strength.
  • the sum of the offset and the compensation amount, and the measured received signal quality value is greater than the sum of the minimum threshold of the received signal quality obtained from the broadcast message and the minimum threshold of the received signal quality, so that the first The cell is set as a serving cell of the terminal device, and provides communication services for the terminal device.
  • the first cell is configured as a serving cell of the terminal device, so that when the terminal device is in an idle state, the measured communication parameter value of the received signal satisfies the requirement of the cell selection, so that the terminal device can perform normal communication.
  • the terminal device may directly obtain the second minimum threshold value of the received signal strength of the first cell or the second minimum threshold value of the received signal strength directly from the broadcast message.
  • the second threshold is obtained, and the measured received signal strength value is determined to be greater than a second threshold. If the measured received signal strength value is greater than the second threshold, the first cell is set as the serving cell of the terminal device. In this way, the terminal device can quickly select a cell suitable for the terminal device to camp, so that the terminal device performs normal communication.
  • the received signal strength value measured to the first cell may be represented, and the first minimum threshold of the received signal strength of the first cell may be represented by m, the first cell
  • the received signal strength can be indicated by ⁇ ,
  • the second minimum threshold of the received signal strength of the first cell may be ⁇ v mn _ ce
  • the first cell is set as the serving cell of the terminal device.
  • ⁇ MaX (P EMax ⁇ P , ⁇ the second cell is a terminal device allowed maximum uplink transmission power acquired from the broadcast message P EM, the? Determined by the terminal device capability maximum uplink transmission power, the , illustrates a first cell terminal allowed maximum uplink transmit power of the difference between the maximum uplink transmission power determined by the terminal device capability between 0 and takes a maximum value, the shellfish 1 J ⁇ , ⁇ "as a greater than or equal to 0
  • PEMax is greater than ⁇ and greater than 0
  • the access range of the terminal equipment at the cell edge is reduced, and the problem of dropped calls and access failures due to insufficient transmission power of the terminal equipment is avoided, and when, ⁇ ⁇ , Pcompensation is equal to
  • the Qr ⁇ offset only periodically searches for the high priority PLMN (Public Land Mobile Network) of the terminal device.
  • PLMN Public Land Mobile Network
  • the Qrd is the RSRP of the first cell measured by the terminal device ( Reference Signal Rec Eiving Power, reference signal received power) Actual value.
  • ⁇ rxfev ⁇ is an integer type, which can be
  • an integer type which can be any integer from 1 to 8.
  • the measured received signal strength value of the first cell is -45
  • the first minimum threshold of the received signal strength of the first cell is -50
  • the reception of the first cell The offset of the first minimum threshold of the signal strength is , and the amount of compensation is
  • the first threshold is -50+7+0, and it is determined whether the measured received signal strength value of the first cell is greater than a first threshold of the first cell, that is, the measured received signal strength value is less than the first threshold -45 ⁇ 50+7+0, the terminal device obtains the second threshold of the first cell from the broadcast message, and determines whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell.
  • the broadcast message includes the second minimum threshold ⁇ 11 - of the received signal strength of the first cell is -55, the measured received signal strength value of the first cell is -45, the reception of the first cell Offset of the first minimum threshold of signal strength
  • the second threshold is -55 +7+0, and it is determined whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, that is, the measured first cell And if the received signal strength value is greater than a second threshold of the first cell, ⁇ 45> ⁇ 55+7+0, the first cell is set as the serving cell of the terminal device.
  • the broadcast message includes an offset ⁇ ⁇ of the second minimum threshold of the received signal strength of the first cell.
  • the measured received signal strength value of the first cell is -45, and the first minimum threshold of the received signal strength of the first cell
  • Qrxlevv ⁇ n 50, the compensation amount is 0, and the second threshold is -50 + 2 + 0, and it is determined whether the measured received signal strength value of the first cell is greater than the second threshold of the first cell, that is, the measured The received signal strength value of a cell is greater than the second threshold of the first cell
  • the terminal device may also obtain a common offset from the broadcast message, where the common offset may be represented by Q , and the common offset is an enumerated type, which may be taken
  • the common offset is used to reduce the first threshold of the first cell, so as to obtain the second threshold of the first cell, so that the measured received signal strength value of the first cell is greater than the second threshold of the first cell,
  • the first cell is set as a serving cell of the terminal device.
  • the first minimum threshold d fevmm of the received signal strength of the first cell is -50
  • the offset 0 of the first minimum threshold of the received signal strength of the first cell is 7, and the compensation amount is (), the common offset the amount.
  • the first threshold is -50 ⁇ 3 + 7 + 0, and it is determined whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, that is, the measured received signal strength value is greater than the second
  • the threshold -45>-50-3+7+0 the first cell is set as the serving cell of the terminal device.
  • the terminal device may obtain the second minimum threshold value of the received signal strength of the first cell or the second minimum threshold value of the received signal strength directly from the local or broadcast message, and obtain a second threshold of the first cell, determining whether the measured received signal strength value of the first cell is greater than a second threshold of the first cell, if the measured received signal strength value of the first cell is greater than a second threshold of the first cell And setting the first cell as a serving cell of the terminal device.
  • the terminal device can quickly select a cell suitable for the terminal device to camp, shorten the time for the terminal device to select the cell, and enable the terminal device to perform normal communication.
  • a method for selecting a cell is applied to a terminal device. It is assumed that the terminal device selects the first cell as a serving cell in a coverage enhancement manner, and reselects the second cell in a non-coverage enhanced manner.
  • Step 801 Receive a broadcast message sent by a base station to which the first cell belongs.
  • the broadcast message includes a first minimum threshold of a communication parameter of the second cell, an offset of a first minimum threshold of the communication parameter of the second cell, a first threshold of the second cell, and a selected cell level parameter. at least one.
  • the terminal device may acquire the first threshold value of the second cell from the broadcast message, the first minimum threshold of the communication parameter of the received signal of the second cell, and the first minimum threshold of the communication parameter of the received signal of the second cell.
  • the shift and the second cell allow the maximum uplink transmit power of the terminal device.
  • the first threshold of the second cell may be represented by Thresh g .
  • the selected cell level parameter is used to select a cell level parameter used by the terminal device to perform message exchange with the base station after the terminal device successfully camps on the first cell in the coverage enhancement manner, and the terminal device first performs the low level of selecting the cell level parameter.
  • the terminal device performs message exchange with the base station, that is, the terminal device and the base station can repeatedly send the terminal device to interact with the base station to transmit the message. If the terminal device cannot select the information exchange between the terminal device and the base station when the terminal device selects the low level of the cell level parameter, the terminal device and the base station may repeatedly transmit the terminal device and the base station by selecting the intermediate level or the advanced level of the cell level parameter.
  • the message sent by the interaction is performed to implement information interaction between the terminal device and the base station.
  • Step 802 Measure a communication parameter value of a received signal of the second cell, where the second cell is any neighboring cell of the first cell.
  • Step 803 Determine whether the communication parameter value is greater than the first threshold, or whether a difference between the communication parameter value and the first threshold is greater than the first threshold.
  • step 804 is performed.
  • step 806 is performed.
  • the embodiment of the present invention assumes that the communication parameter value is greater than the first threshold, or that the difference between the communication parameter value and the first threshold is greater than the first threshold, and performing steps
  • Step 804 Set the second cell as a serving cell of the terminal device.
  • Step 805 Send an update message to the base station.
  • the base station is configured to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, where the update message includes the The identifier of the second cell and the first threshold of the communication parameter of the received signal of the second cell or the first threshold of the second cell.
  • Step 806 Determine, according to a high-low relationship between a frequency priority of the first cell and a frequency priority of the second cell, a corresponding parameter selected from the broadcast message to the second cell to determine the first
  • the second cell is set as a serving cell of the terminal device.
  • the corresponding parameter includes at least an amount of hysteresis of a communication parameter of a received signal of the first cell and an offset of a communication parameter of a received signal of the second cell.
  • the base station is configured to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, where the update message includes the The identifier of the second cell and the corresponding parameter of the second cell acquired according to the second cell frequency priority.
  • the corresponding parameter includes a hysteresis amount of a communication parameter of the received signal of the first cell, an offset of a communication parameter of a received signal of the second cell, a second threshold value of the first cell, and a second cell At least one of the second threshold values.
  • a method for selecting a cell is applied to a terminal device, and the terminal device measures a communication parameter value of a received signal of the first cell, and acquires a first threshold of the first cell. Determining that the communication parameter value of the received signal of the first cell is greater than the first threshold of the first cell, that is, selecting the first cell as the serving cell in a non-coverage enhanced manner, and reselecting the second cell by using an enhanced manner, including:
  • Step 901 Receive a broadcast message sent by a base station to which the first cell belongs.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a received signal of the second cell. At least one of an offset of the communication parameter, a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter.
  • the terminal device may also repeatedly perform detection of the broadcast message until the broadcast message is detected, and the broadcast message is received.
  • Step 902 If the communication parameter value of the received signal of the first cell is greater than the first threshold of the first cell, set the first cell as a serving cell of the terminal device.
  • Step 903 Measure a communication parameter value of the received signal of the second cell.
  • the second cell is any neighboring cell of the first cell.
  • Step 904 Acquire a second threshold of the second cell.
  • the second threshold includes at least a sum of a second minimum threshold of communication parameters of the received signal of the second cell and an offset of a first minimum threshold of communication parameters of the received signal of the second cell.
  • Step 905 Determine whether a communication parameter value of the received signal of the second cell is greater than a second threshold of the second cell, or a difference between a communication parameter value of the received signal of the second cell and the second threshold. Whether it is greater than the second threshold.
  • step 906 is performed.
  • step 907 is performed.
  • Step 906 Set the second cell as a serving cell of the terminal device.
  • Step 907 Send an update message to the base station.
  • the base station In order for the base station to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message, where the update message includes the identifier of the second cell and the second The second threshold of the communication parameter of the received signal of the cell or the second threshold of the second cell.
  • Step 908 According to the relationship between the frequency priority of the first cell and the frequency priority of the second cell, obtain, by using the broadcast message, a corresponding parameter selected to the second cell to determine the first The second cell is set as a serving cell of the terminal device.
  • the corresponding parameter includes at least an amount of hysteresis of a communication parameter of a received signal of the first cell and an offset of a communication parameter of a received signal of the second cell.
  • the information includes an identifier of the second cell and a corresponding parameter of the second cell acquired according to a second cell frequency priority.
  • the second threshold of the second cell is obtained from the broadcast message, and the communication parameter value of the second cell is determined to be greater than the first a second threshold of the second cell, or the difference between the communication parameter value of the second cell and the second threshold is greater than the second threshold, so that the terminal device can reselect to the second cell, where the terminal device performs In the case of normal communication, the communication quality of the terminal device is improved.
  • a method for selecting a cell includes: Step 1001: Acquire a broadcast message.
  • the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, a hysteresis of the communication parameter of the received signal of the first cell, and a communication parameter of the received signal of the second cell. At least one of an offset and a second threshold of the second cell, a frequency priority parameter of the first cell, a frequency priority parameter of the second cell, and a selected cell level parameter, the second The cell is a neighboring cell of the first cell.
  • the broadcast message is obtained from a request message, a response message, or an update message sent locally or from the second base station to the first base station.
  • the broadcast message is repeatedly sent to the terminal device, so that the terminal device selects a cell according to the broadcast message.
  • Step 1002 Send a broadcast message to the terminal device.
  • Step 1003 Receive an update message sent by the terminal device.
  • the update message includes an identifier of the second cell, a hysteresis amount of a communication parameter of a received signal of the first cell, an offset of a communication parameter of a received signal of the second cell, and a second threshold value. At least one, in order to transparently transmit the update message to the mobility management entity, such that the mobility management entity pages the terminal device according to the update message.
  • the base station sends the broadcast message to the terminal device by acquiring a broadcast message, where the broadcast message includes a second minimum threshold of the communication parameter, an offset of the second minimum threshold of the communication parameter, and a reception of the first cell.
  • the amount of hysteresis of the communication parameter of the signal, the offset of the communication parameter of the received signal of the second cell, the second threshold of the second cell, the frequency priority parameter of the first cell, and the second cell At least one of a frequency priority parameter and a selected cell level parameter, wherein the second cell is a neighboring cell of the first cell, so that the terminal device selects a cell according to the broadcast message, so that the terminal device can perform Normally communicating, and receiving an update message sent by the terminal device, so as to transparently transmit the update message to the mobility management entity, so that the mobility management entity pages the terminal device according to the update message.
  • the embodiment of the present invention provides a terminal device, when the terminal device reselects to the neighboring cell of the first cell, that is, the second cell capable of providing communication service for the terminal device, if the communication parameter value of the second cell is less than or equal to Determining, by the first threshold of the second cell, the terminal device needs to obtain, according to the relationship between the carrier frequency priority of the second cell and the carrier frequency priority of the first cell, the corresponding selection from the broadcast message to the second cell. Parameter, selecting different measurement initiation rules, to determine that the second cell is set as the serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the carrier frequency priority of the cell is configured in the base station, and the carrier frequency priority of the cell of the terminal device is notified by the base station transmitting the broadcast message to the terminal device, where the broadcast message carries the carrier frequency priority of the cell.
  • the cellReselectionPriority indicates the carrier frequency priority of the cell.
  • the carrier frequency priority of the cell ranges from 0 to 7.
  • the value of the carrier frequency priority of the cell is larger, indicating that the reselection priority of all cells on the corresponding carrier frequency is higher. high.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is The sum of the received signal strength value of the first cell and the second hysteresis of the received signal strength, the value being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is smaller than the R «i value, and if the value is less than the value 1 , setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameter of the first cell may be expressed, and the first offset of the communication parameter of the second cell may be represented by ⁇ , then
  • the second hysteresis of the received signal strength of the first cell may be represented by ⁇
  • the second offset of the received signal strength of the second cell may be represented by Q
  • the second hysteresis of the communication parameter is less than a first hysteresis of the communication parameter, and the second offset of the communication parameter is less than a first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second The cell is set as a serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the terminal device when the terminal device reselects to the neighboring cell of the first cell, that is, the second cell that can provide the communication service for the terminal device, when the communication parameter value of the first cell is less than or equal to the first cell of the second cell. a threshold value, the communication parameter value of the second cell is less than or equal to a second threshold of the second cell, and the terminal device needs to be based on a relationship between a carrier frequency priority of the second cell and a carrier frequency priority of the first cell, Obtaining a corresponding parameter selected to the second cell in the broadcast message, and selecting a different measurement initiation rule to determine that the second cell is set as a serving cell of the terminal device, so as to enable the terminal device to perform normal communication.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is equal to the frequency priority of the second cell, the second cell is a neighboring cell of the first cell, and obtains a value or a value, where the value is The sum of the received signal strength value of the first cell and the second hysteresis of the received signal strength, the value being the difference between the received signal strength value of the second cell and the second offset of the received signal strength. Determining whether the value is less than the value, and if the value is less than the value of 1 , setting the second cell as a serving cell of the terminal device.
  • the first hysteresis of the communication parameter of the first cell may be expressed, and the first offset of the communication parameter of the second cell may be represented by ⁇ , then
  • the second hysteresis of the received signal strength of the first cell may be expressed by ⁇
  • the second offset of the received signal strength of the two cells can be represented by Q , then
  • the second hysteresis of the communication parameter is less than a first hysteresis of the communication parameter, and the second offset of the communication parameter is less than a first offset of the communication parameter.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is higher than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the first cell and a second threshold of the first cell is smaller than a second threshold of the first cell, a communication parameter value of the second cell, and a second cell Whether the difference between the two thresholds is greater than the second threshold of the second cell.
  • the communication parameter value of the first cell and the second threshold of the first cell is smaller than the second threshold of the first cell, the communication parameter value of the second cell and the second cell The difference between the thresholds is greater than the second threshold of the second cell, and the second cell is set as the serving cell of the terminal device.
  • the terminal device When the terminal device performs cell reselection, if the frequency priority of the first cell is lower than the frequency priority of the second cell, the second cell is a neighboring cell of the first cell. Determining whether a difference between a communication parameter value of the second cell and a second threshold of the second cell is greater than a second threshold of the second cell, if a communication parameter value of the second cell is related to the second cell Whether the difference between the second threshold is greater than a second threshold of the second cell, and setting the second cell as a serving cell of the terminal device.
  • the terminal device selects the first cell in the coverage enhancement mode and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is weak to a place where the received signal is strong, The receiving signal of the second cell is strong, and the terminal device reselects to the second cell in a non-coverage enhanced manner, but when the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, The received signal of the second cell is also weak, and the value of the communication parameter of the received signal measured by the terminal device cannot meet the S criterion, and the terminal device determines the frequency priority of the first cell and the frequency priority of the second cell.
  • the method performs cell reselection.
  • the terminal device selects the first cell in a non-coverage enhanced manner and sets the first cell as the serving cell of the terminal device, if the terminal device moves from a place where the received signal is strong to a place where the received signal is weak, there is a The receiving signal of the second cell is weak, and the terminal device reselects the second cell to the second cell.
  • the priority of the terminal device may be that the frequency priority of the first cell is lower than the frequency priority of the second cell.
  • the terminal device may also perform cell reselection by determining a frequency priority of the first cell and a frequency priority of the second cell.
  • the terminal device when the terminal device selects the second cell in a non-coverage enhanced manner and sets the second cell as the serving cell of the terminal device, when the communication parameter value of the second cell is less than or equal to the second cell
  • a threshold when the terminal device selects the second cell in the coverage enhancement manner and sets the second cell as the serving cell of the terminal device, when the communication parameter value of the first cell is less than or equal to the second cell
  • the terminal device may be based on the carrier frequency priority of the second cell and the carrier frequency priority of the first cell.
  • the broadcast message is obtained from the base station to which the measured cell belongs, and the broadcast message may be the first system.
  • Information block is transmitted in the fifth subframe of each even frame, but in the coverage enhancement mode, the terminal cannot acquire the first information block in the existing manner.
  • the base station firstly sends the broadcast message, and then the terminal device can obtain the first time period from the locally preset configuration information. Based on the assumption, the terminal repeatedly receives the broadcast message sent by the base station in the first time period. , and merge the parsing of the weight Receiving the broadcast message to obtain the content of the broadcast message.
  • the base station firstly sends the broadcast message, and then the terminal device can obtain the first time period from the locally preset configuration information. Based on the assumption, the terminal device modulates the first time period from the system frame number. When the first time period is modulo, the frame is 0, and the first time period is used as the receiving window, and the broadcast message is repeatedly received in the receiving window, and the broadcast message is repeatedly received and parsed. To obtain the content of the broadcast message. For example, if the first time period is N, the terminal device starts from the system frame with the system frame number modulo N to 0 and ends with the system frame number N modulo N-1. Successive N frames are used as receiving windows.
  • the base station firstly sends the broadcast message, and then the terminal device can obtain the first time period from the locally preset configuration information, and based on the assumption, the terminal device acquires the broadcast message from the start time of the receiving window.
  • the terminal device acquires the broadcast message from the start time of the receiving window.
  • Starting at a time point using the first time period as a receiving window, continuously sliding the receiving window, and repeatedly receiving the broadcast message in the receiving window, and merging and parsing the repeatedly received broadcast message until parsing The broadcast message.
  • the starting moment of the receiving window may be the starting moment of any one of the frames in the system frame, and the consecutive N frames serve as the receiving window.
  • the first time period is a broadcast message merge count corresponding to a maximum coverage enhancement level supported by the base station or the first time period is a system information modification period.
  • the first time period is an integer multiple of 64 frames.
  • the broadcast cancellation is obtained for the configuration information preset from the terminal device.
  • the terminal device may acquire, from the content of the first system information block, at least one second system information block received in an overlay enhanced manner, each of the second system information being different from the first system information block.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, and may be located in one place or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. .

Abstract

本发明的实施例提供一种选择小区的装置、方法及系统,涉及通信领域,能够使终端设备进行正常通信。包括:测量第一小区的接收信号的通信参数值;判断所述通信参数值是否大于第一阈值;若所述通信参数值小于或等于所述第一阈值,获取第二阈值;判断所述通信参数值是否大于所述第二阈值;若所述通信参数值大于所述第二阈值,将所述第一小区设置为所述终端设备的服务小区。本发明实施例提供的选择小区装置、方法及系统用于选择小区。

Description

一种选择小区的装置、 方法及系统 技术领域
本发明涉及通信领域, 尤其涉及一种选择小区的装置、 方法及 系统。
背景技术
目前, 与终端设备的移动性相关的过程包括小区选择和小区重 选。 现有技术中, 当终端设备开机或从盲区进入信号覆盖区域时, 若终端设备没有存储该终端设备开机或从盲区进入信号覆盖区域之 前所驻留的小区信息, 首先, 终端设备扫描所有可以使用的射频信 道, 在每个射频信道的载频上, 终端设备仅搜索射频信道质量最好 的小区, 然后测量所述小区的通信参数值, 同时接收基站发送的广 播消息, 再根据 S ( Select , 选择) 准则判断终端设备搜索到的小区 是否为该终端设备进行驻留的合适的小区, 当终端设备测量到的通 信参数值满足 S 准则, 则终端设备将所述小区设置为该终端设备的 服务小区。 所述通信参数为接收信号强度或接收信号质量。 需要说 明的是, 当终端设备将所述小区设置为该终端设备的服务小区时, 所述小区的通信状态为非禁止状态, 所述小区的禁止状态为该小区 只能为终端设备提供紧急呼叫的通信服务的状态。
在终端设备驻留到服务小区之后, 若终端设备接收到的广播消 息中包括该服务小区的相邻小区, 且该相邻小区的优先级高于所述 服务小区的优先级, 终端设备对该相邻小区进行测量, 若该相邻小 区的接收信号强度在小区重选时间内高于广播消息中的该相邻小区 的预设门限, 则将该相邻小区作为终端设备进行小区重选的目标小 区, 终端设备重选到该目标小区。
若该相邻小区的优先级与所述服务小区的优先级相等, 该服务 小区的接收信号强度小于广播消息中的 时, 终端设备对该 相邻小区进行测量, 若该相邻的小区满足 S准则和 R ( Reselect , 重 选) 准则, 则将该相邻小区作为终端设备进行小区重选的 目 标小 区, 终端设备重选到该目标小区。 所述 R准则为 ^〉 , = +¾^ 和 = Q s,n _ Qffiet , 所述 为服务小区的接收信号强度的迟滞量, 所 述 Q 为相邻小区的接收信号强度的偏移量, 所述 Q 和所述 Qff用 于小区重选时防止产生乒乓效应。
若该相邻小区的优先级低于所述服务小区的优先级, 该相邻小 区的接收信号强度小于广播消息中的 , 且该服务小区的接 收信号强度大于广播消息中的 Thresh 时, 则将该相邻小区作为终端 设备进行小区重选的目标小区, 终端设备重选到该目标小区。
但是, 当终端设备处于楼宇或地下室时, 基站向终端设备发送 的信号会经过障碍物的绕射、 反射等, 终端设备接收到的经过障碍 物的信号可能存在损失, 因此, 当终端设备处于空闲态时, 测量到 的接收信号的通信参数值较低, 无法满足现有小区选择及小区重选 的要求, 从而导致终端设备无法进行正常通信。
发明内容
本发明的实施例提供一种选择小区的装置、 方法及系统, 能够 使终端设备进行正常通信。
为达到上述目的, 本发明的实施例采用如下技术方案:
第一方面, 提供一种终端设备, 包括:
第一测量单元, 用于测量第一小区的接收信号的通信参数值, 所述第一小区是能够为所述终端设备提供通信服务的小区;
第一判断单元, 用于判断所述通信参数值是否大于所述第一小 区的第一阈值, 所述第一阈值至少包括所述第一小区的接收信号的 通信参数的第一最小阈值与所述第一小区的接收信号的通信参数的 第一最小阈值的偏移量之和; 第一获取单元, 用于若所述通信参数值小于或等于所述第一阈 值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述第一 小区的接收信号的通信参数的第一最小阈值与所述第一小区的接收 信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第二最小阈值与所 述第一小区的接收信号的通信参数的第一最小阈值的偏移量之和; 第二判断单元, 用于判断所述通信参数值是否大于所述第二阈 值;
第一设置单元, 用于若所述通信参数值大于所述第二阈值, 将 所述第一小区设置为所述终端设备的服务小区。
结合第一方面, 在第一种可实现方式中,
所述终端设备还包括:
第二测量单元, 用于测量第二小区的接收信号的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区;
第二获取单元, 用于从所述广播消息中获取所述第二小区的第 一阈值或所述第二小区的第一门限值, 所述第一阈值至少包括所述 第二小区的接收信号的通信参数的第一最小阈值与所述第二小区的 接收信号的通信参数的第一最小阈值的偏移量之和;
第三判断单元, 用于判断所述通信参数值是否大于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一门 限值;
第二设置单元, 用于若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限值, 将 所述第二小区设置为所述终端设备的服务小区;
所述第二设置单元还用于若所述通信参数值小于或等于所述第 一阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述 第一门限值, 根据所述第一小区的频率优先级与所述第二小区的频 率优先级的高低关系, 从所述广播消息中获取选择到所述第二小区 的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。
结合第一方面, 在第二种可实现方式中,
所述第一设置单元还用于若所述第一小区的接收信号的通信参 数值大于所述第一小区的第一阈值, 将所述第一小区设置为所述终 端设备的服务小区;
所述终端设备还包括:
第三测量单元, 用于测量第二小区的接收信号的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区;
第三获取单元, 用于当所述第一小区的接收信号的通信参数值 小于或等于所述第一小区的第一阈值, 从所述广播消息中获取第二 小区的第二阈值, 所述第二阈值至少包括所述第二小区的接收信号 的通信参数的第二最小阈值与所述第二小区的接收信号的通信参数 的第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信号的 通信参数值与所述第一小区的第一阈值之差小于或等于第一门限 值, 获取第二小区的第二门限值;
第四判断单元, 用于判断所述第二小区的接收信号的通信参数 值是否大于所述第二小区的第二阈值, 或, 所述第二小区的接收信 号的通信参数值与所述第二阈值之差是否大于所述第二门限值; 第三设置单元, 用于若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限值, 将 所述第二小区设置为所述终端设备的服务小区;
所述第三设置单元还用于若所述第二小区的通信参数值小于或 等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于 或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第 二小区的频率优先级的高低关系, 从所述广播消息中获取选择到所 述第二小区的相应参数来确定将所述第二小区设置为所述终端设备 的服务小区, 所述相应参数至少包括所述第一小区的接收信号的通 信参数的迟滞量和所述第二小区的接收信号的通信参数的偏移量。
结合第一方面、 第一至第二种可实现方式, 在第三种可实现方 式中,
接收单元, 用于接收第一小区所属基站发送的广播消息, 所述 广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小 阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二 门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优 先级参数和选择小区等级参数中至少一个。
结合第三种可实现方式, 在第四种可实现方式中,
所述接收单元还用于:
重复进行所述广播消息的检测, 直到检测到所述广播消息, 接 收所述广播消息。
结合第一至第二种可实现方式, 在第五种可实现方式中, 发送单元, 用于向基站发送更新消息, 以便于所述基站将所述 更新消息透传至移动管理实体, 使得所述移动管理实体根据所述更 新消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标 识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量 和第二门限值中至少一个。
结合第一方面、 第一至第五种可实现方式, 在第六种可实现方 式中,
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
第二方面, 提供一种基站, 包括:
获取单元, 用于获取广播消息, 所述广播消息包括通信参数的 第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区 的接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参数 的偏移量和所述第二小区的第二门限值、 所述第一小区的频率优先 级参数、 所述第二小区的频率优先级参数和选择小区等级参数中至 少一个, 所述第二小区为所述第一小区的邻小区;
发送单元, 用于向终端设备发送广播消息, 以便于所述终端设 备根据所述广播消息选择小区。
结合第二方面, 在第一种可实现方式中,
所述获取单元具体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
结合第一种可实现方式, 在第二种可实现方式中,
所述发送单元还用于:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
结合第二方面, 在第三种可实现方式中, 所述基站还包括: 接收单元, 用于接收所述终端设备发送的更新消息, 所述更新 消息包括所述第二小区的标识、 所述第一小区的接收信号的通信参 数的迟滞量、 所述第二小区的接收信号的通信参数的偏移量和第二 门限值中至少一个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述终端设备。 第三方面, 提供一种通信系统, 包括:
以上任意所述的终端设备和以上任意所述的基站中至少一个。 第四方面, 提供一种终端设备, 包括:
处理器, 用于测量第一小区的接收信号的通信参数值, 所述第 一小区是能够为所述终端设备提供通信服务的小区;
所述处理器还用于判断所述通信参数值是否大于所述第一小区 的第一阈值, 所述第一阈值至少包括所述第一小区的接收信号的通 信参数的第一最小阈值与所述第一小区的接收信号的通信参数的第 一最小阈值的偏移量之和;
所述处理器还用于若所述通信参数值小于或等于所述第一阈 值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述第一 小区的接收信号的通信参数的第一最小阈值与所述第一小区的接收 信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第二最小阈值与所 述第一小区的接收信号的通信参数的第一最小阈值的偏移量之和; 所述处理器还用于判断所述通信参数值是否大于所述第二阈 值;
所述处理器还用于若所述通信参数值大于所述第二阈值, 将所 述第一小区设置为所述终端设备的服务小区。
结合第四方面, 在第一种可实现方式中,
所述处理器还用于测量第二小区的接收信号的通信参数值, 所 述第二小区为所述第一小区的任意一个邻小区;
所述处理器还用于从所述广播消息中获取所述第二小区的第一 阈值或所述第二小区的第一门限值, 所述第一阈值至少包括所述第 二小区的接收信号的通信参数的第一最小阈值与所述第二小区的接 收信号的通信参数的第一最小阈值的偏移量之和;
所述处理器还用于判断所述通信参数值是否大于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一门 限值;
所述处理器还用于若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限值, 将所述 第二小区设置为所述终端设备的服务小区;
所述处理器还用于若所述通信参数值小于或等于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述第一 门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优 先级的高低关系, 从所述广播消息中获取选择到所述第二小区的相 应参数来确定将所述第二小区设置为所述终端设备的服务小区, 所 述相应参数至少包括所述第一小区的接收信号的通信参数的迟滞量 和所述第二小区的接收信号的通信参数的偏移量。
结合第四方面, 在第二种可实现方式中,
所述处理器还用于若所述第一小区的接收信号的通信参数值大 于所述第一小区的第一阈值, 将所述第一小区设置为所述终端设备 的服务小区;
所述处理器还用于测量第二小区的接收信号的通信参数值, 所 述第二小区为所述第一小区的任意一个邻小区;
所述处理器还用于当所述第一小区的接收信号的通信参数值小 于或等于所述第一小区的第一阈值, 从所述广播消息中获取第二小 区的第二阈值, 所述第二阈值至少包括所述第二小区的接收信号的 通信参数的第二最小阈值与所述第二小区的接收信号的通信参数的 第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信号的通 信参数值与所述第一小区的第一阈值之差小于或等于第一门限值, 获取第二小区的第二门限值;
所述处理器还用于判断所述第二小区的接收信号的通信参数值 是否大于所述第二小区的第二阈值, 或, 所述第二小区的接收信号 的通信参数值与所述第二阈值之差是否大于所述第二门限值; 所述处理器还用于若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限值, 将所述 第二小区设置为所述终端设备的服务小区;
所述处理器还用于若所述第二小区的通信参数值小于或等于所 述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于 所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区 的频率优先级的高低关系, 从所述广播消息中获取选择到所述第二 小区的相应参数来确定将所述第二小区设置为所述终端设备的服务 小区, 所述相应参数至少包括所述第一小区的接收信号的通信参数 的迟滞量和所述第二小区的接收信号的通信参数的偏移量。
结合第四方面、 第一至第二种可实现方式, 在第三种可实现方 式中,
接收机, 用于接收第一小区所属基站发送的广播消息, 所述广 播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小阈 值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所述 第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二门 限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优先 级参数和选择小区等级参数中至少一个。
结合第三种可实现方式, 在第四种可实现方式中,
所述接收机还用于:
重复进行所述第二广播消息的检测, 直到检测到所述第二广播 消息, 接收所述第二广播消息。
结合第一至第二种可实现方式, 在第五种可实现方式中, 所述 终端设备还包括:
发射机, 用于向基站发送更新消息, 以便于所述基站将所述更 新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新 消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量和第 二门限值中至少一个。
结合第四方面、 第一至第五种可实现方式, 在第六种可实现方 式中,
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
第五方面, 提供一种基站, 包括:
处理器, 用于获取广播消息, 所述广播消息包括通信参数的第 二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区的 接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参数的 偏移量和所述第二小区的第二门限值、 所述第一小区的频率优先级 参数、 所述第二小区的频率优先级参数和选择小区等级参数中至少 一个, 所述第二小区为所述第一小区的邻小区;
发射机, 用于向终端设备发送广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
结合第五方面, 在第一种可实现方式中,
所述处理器具体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
结合第一种可实现方式, 在第二种可实现方式中, 所述处理器 还用于: 重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
结合第二方面, 在第三种可实现方式中, 所述基站还包括: 接收机, 用于接收所述终端设备发送的更新消息, 所述更新消 息包括所述第二小区的标识、 所述第一小区的接收信号的通信参数 的迟滞量、 所述第二小区的接收信号的通信参数的偏移量和第二门 限值中至少一个, 以便于将所述更新消息透传至移动管理实体, 使 得所述移动管理实体根据所述更新消息寻呼所述终端设备。
第六方面, 提供一种通信系统, 包括:
以上任意所述的终端设备和以上任意所述的基站中至少一个。 第七方面, 提供一种选择小区的方法, 应用于终端设备, 包 括:
测量第一小区的接收信号的通信参数值, 所述第一小区是能够 为所述终端设备提供通信服务的小区;
判断所述通信参数值是否大于所述第一小区的第一阈值, 所述 第一阈值至少包括所述第一小区的接收信号的通信参数的第一最小 阈值与所述第一小区的接收信号的通信参数的第一最小阈值的偏移 量之和;
若所述通信参数值小于或等于所述第一阈值, 从广播消息中获 取第二阈值, 所述第二阈值至少包括所述第一小区的接收信号的通 信参数的第一最小阈值与所述第一小区的接收信号的通信参数的第 二最小阈值的偏移量之和, 或, 所述第二阈值至少包括所述第一小 区的接收信号的通信参数的第二最小阈值与所述第一小区的接收信 号的通信参数的第一最小阈值的偏移量之和;
判断所述通信参数值是否大于所述第二阈值;
若所述通信参数值大于所述第二阈值, 将所述第一小区设置为 所述终端设备的服务小区。 结合第一方面, 在第一种可实现方式中, 在所述将所述第一小 区设置为所述终端设备的服务小区之后, 所述方法还包括:
测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区;
从所述广播消息中获取所述第二小区的第一阈值或所述第二小 区的第一门限值, 所述第一阈值至少包括所述第二小区的接收信号 的通信参数的第一最小阈值与所述第二小区的接收信号的通信参数 的第一最小阈值的偏移量之和;
判断所述通信参数值是否大于所述第一阈值, 或, 所述通信参 数值与所述第一阈值之差是否大于所述第一门限值;
若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与 所述第一阈值之差大于所述第一门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述通信参数值小于或等于所述第一阈值, 或, 所述通信参 数值与所述第一阈值之差小于或等于所述第一门限值, 根据所述第 一小区的频率优先级与所述第二小区的频率优先级的高低关系, 从 所述广播消息中获取选择到所述第二小区的相应参数来确定将所述 第二小区设置为所述终端设备的服务小区, 所述相应参数至少包括 所述第一小区的接收信号的通信参数的迟滞量和所述第二小区的接 收信号的通信参数的偏移量。
结合第七方面, 在第二种可实现方式中,
在所述判断所述通信参数值是否大于所述第一小区的第一阈值 之后, 所述方法还包括:
若所述第一小区的接收信号的通信参数值大于所述第一小区的 第一阈值, 将所述第一小区设置为所述终端设备的服务小区;
测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区; 当所述第一小区的接收信号的通信参数值小于或等于所述第一 小区的第一阈值, 从所述广播消息中获取第二小区的第二阈值, 所 述第二阈值至少包括所述第二小区的接收信号的通信参数的第二最 小阈值与所述第二小区的接收信号的通信参数的第一最小阈值的偏 移量之和, 或, 当所述第一小区的接收信号的通信参数值与所述第 一小区的第一阈值之差小于或等于第一门限值, 获取第二小区的第 二门限值;
判断所述第二小区的接收信号的通信参数值是否大于所述第二 小区的第二阈值, 或, 所述第二小区的接收信号的通信参数值与所 述第二阈值之差是否大于所述第二门限值;
若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与 所述第二阈值之差大于所述第二门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述第二小区的通信参数值小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优先级的高 低关系, 从所述广播消息中获取选择到所述第二小区的相应参数来 确定将所述第二小区设置为所述终端设备的服务小区, 所述相应参 数至少包括所述第一小区的接收信号的通信参数的迟滞量和所述第 二小区的接收信号的通信参数的偏移量。
结合第七方面、 第一至第二种可实现方式, 在第三种可实现方 式中, 在所述测量第一小区的接收信号的通信参数值或测量第二小 区的接收信号的通信参数值之前, 所述方法还包括:
接收第一小区所属基站发送的广播消息, 所述广播消息包括通 信参数的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所述第二小区的接 收信号的通信参数的偏移量、 所述第二小区的第二门限值、 所述第 一小区的频率优先级参数、 所述第二小区的频率优先级参数和选择 小区等级参数中至少一个。
结合第三种可实现方式, 在第四种可实现方式中, 所述接收第 一小区所属基站发送的广播消息包括:
重复进行所述广播消息的检测, 直到检测到所述广播消息, 接 收所述广播消息。
结合第一至第二种可实现方式, 在第五种可实现方式中, 在所 述将所述第二小区设置为所述终端设备的服务小区之后, 所述方法 还包括:
向基站发送更新消息, 以便于所述基站将所述更新消息透传至 移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述 终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通 信参数的迟滞量、 接收信号的通信参数的偏移量和第二门限值中至 少一个。
结合第一方面、 第一至第五种可实现方式, 在第六种可实现方 式中,
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
第八方面, 提供一种选择小区的方法, 应用于基站, 包括: 获取广播消息, 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区的接收信号的通 信参数的迟滞量、 第二小区的接收信号的通信参数的偏移量和所述 第二小区的第二门限值、 所述第一小区的频率优先级参数、 所述第 二小区的频率优先级参数和选择小区等级参数中至少一个, 所述第 二小区为所述第一小区的邻小区;
向终端设备发送广播消息, 以便于所述终端设备根据所述广播 消息选择小区。
结合第八方面, 在第一种可实现方式中,
所述获取广播消息包括:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
结合第一种可实现方式, 在第二种可实现方式中,
所述向终端设备发送广播消息包括:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
结合第八方面, 在第三种可实现方式中, 在所述向终端设备发 送广播消息之后, 所述方法还包括:
接收所述终端设备发送的更新消息, 所述更新消息包括所述第 二小区的标识、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量和第二门限值中至少一 个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管 理实体根据所述更新消息寻呼所述终端设备。
本发明实施例提供一种选择小区的装置、 方法及系统, 所述选 择小区的装置, 包括: 第一测量单元, 用于测量第一小区的接收信 号的通信参数值, 所述第一小区是能够为所述终端设备提供通信服 务的小区; 第一判断单元, 用于判断所述通信参数值是否大于所述 第一小区的第一阈值, 所述第一阈值至少包括所述第一小区的接收 信号的通信参数的第一最小阈值与所述第一小区的接收信号的通信 参数的第一最小阈值的偏移量之和; 第一获取单元, 用于若所述通 信参数值小于或等于所述第一阈值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述第一小区的接收信号的通信参数的第一 最小阈值与所述第一小区的接收信号的通信参数的第二最小阈值的 偏移量之和, 或, 所述第二阈值至少包括所述第一小区的接收信号 的通信参数的第二最小阈值与所述第一小区的接收信号的通信参数 的第一最小阈值的偏移量之和; 第二判断单元, 用于判断所述通信 参数值是否大于所述第二阈值; 第一设置单元, 用于若所述通信参 数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的服 务小区。 这样一来, 当测量到的第一小区的接收信号的通信参数值 小于或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该 通信参数值大于所述第二阈值, 将所述第一小区设置为所述终端设 备的服务小区, 使得终端设备在空闲态时, 测量到的接收信号的通 信参数值满足小区选择的要求, 从而能够使终端设备进行正常通 信。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1 为本发明实施例提供一种终端设备结构示意图;
图 2为本发明实施例提供另一种终端设备结构示意图; 图 3为本发明实施例提供又一种终端设备结构示意图; 图 4为本发明实施例提供一种基站结构示意图;
图 5为本发明实施例提供一种通信系统示意图;
图 6为本发明实施例提供再一种终端设备结构示意图; 图 7为本发明实施例提供另一种基站结构示意图; 图 8为本发明实施例提供另一种通信系统示意图; 图 9为本发明实施例提供一种选择小区的方法流程图; 图 10为本发明实施例提供另一种选择小区的方法流程图; 图 1 1 为本发明实施例提供又一种选择小区的方法流程图; 图 12为本发明实施例提供再一种选择小区的方法流程图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
实施例一
本发明实施例提供一种终端设备, 首先, 终端设备以非覆盖增 强方式选择能够为所述终端设备提供通信服务的小区, 假设终端设 备检测到第一小区满足为该终端设备提供通信服务的要求, 则将该 第一小区设置为该终端设备的服务小区; 若第一小区不满足为所述 终端设备提供通信服务的要求, 则该终端设备以覆盖增强方式选择 该第一小区, 使得第一小区满足为该终端设备提供通信服务的要 求, 则将所述第一小区设置为该终端设备的服务小区。
其中, 所述非覆盖增强方式为终端设备首先测量能够为该终端 设备提供通信服务的第一小区的接收信号的通信参数值, 并获取第 一小区的第一阈值, 然后, 判断所述通信参数值是否大于所述第一 阈值, 若该通信参数值大于该第一阈值, 则将所述第一小区设置为 该终端设备的服务小区。 所述通信参数为接收信号强度或接收信号 质量。
当通信参数为接收信号强度时, 所述第一阈值包括接收信号强 度的第一最小阈值、 所述接收信号强度的第一最小阈值的偏移量与 补偿量之和。 实际应用 中, 接收信号强度的第一最小阈值可以用 Grxfev匪表示, 可以为小区选择时最小接收信号强度值, 接收信号强 度的第一最小阈值的偏移量可以用 β 表示, 可以为小区选择 时最小接收信号强度值的偏移量, 补偿量可以用 d^"。《表示, 所述 — =Max P ― P, , 其中, 所述 为终端设备在小区中允许的 最大上行发射功率, 所述 为由终端设备能力决定的最大上行发 射功率。 所述 。 "和 从终端设备所测量的小区所属基 站发送的广播消息中获得。 测量到的接收信号强度值可以用 表示。 因此, 当终端设备测量到的接收信号强度值大于第一阈值 日于 Qrxlevmeas > ( ^r /e min + Qrxlev min offset ) + ^compensation日于 ^夺 、则 _J. 的小区设置为该终端设备的服务小区。
当通信参数为接收信号质量时, 所述第一阈值包括接收信号质 量的第一最小阈值、 所述接收信号质量的第一最小阈值的偏移量之 和。 实际应用 中, 接收信号质量的第一最小阈值可以用 匪表 示, 可以为小区选择时最小接收信号质量值, 接收信号质量的第一 最小阈值的偏移量可以用 0 o表示, 可以为小区选择时最小接收 信号质量值的偏移量。 测量到的接收信号质量值可以用 表 示。 因此, 当终端设备测量到的接收信号质量值大于第一阈值时, Qqualmeas > [ Qqualmm + Qqualmmoffset }时 , ;]夺终端设备测量的小区设置为该
Figure imgf000020_0001
S rxlev Qqualmeas i^ Qq al in + Qqual moffset ) p| S rxiev > 0 口 > 0日于 p为 g 则, 所述 可以为第一小区选择时接收信号强度值, 5 ^可以为第 一小区选择时接收信号质量值。 在本发明 中终端设备可以满足 S > G和 > G至少一个, 即终端设备测量到的接收信号强度值满足 fev > G和终端设备测量到的接收信号质量值满足1 > 0中至少一个, 该终端设备就可以驻留到测量的小区。 当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 终 端设备判断 值是否小于 值。 所述 值为第一小区的接收信号强 度值与接收信号强度的第一迟滞量之和, 所述 值为第二小区的接 收信号强度值与接收信号强度的第一偏移量之差。 若 值小于 值, 将所述第一小区设置为该终端设备的服务小区。
通常情况下, 第一小区的接收信号强度的第一迟滞量可以用 表示, 第二小区的接收信号强度的第一偏移量可以用 ρ。 表示, 贝 |J ^ = 和 , 当 > ? p为 R准贝 'J 。 当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与该第一小区的第一阈值之差是否小 于该第一小区的第一门限值, 且所述第二小区的通信参数值与该第 二小区的第一阈值之差是否大于该第二小区的第一门限值。
若所述第一小区的通信参数值与该第一小区的第一阈值之差小 于该第一小区的第一门限值, 且所述第二小区的通信参数值与该第 二小区的第一阈值之差大于该第二小区的第一门限值, 。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第一阈值之差是否大 于该第二小区的第一门限值, 若所述第二小区的通信参数值与该第 二小区的第一阈值之差大于该第二小区的第一门限值, 将所述第一 小区设置为该终端设备的服务小区。
所述覆盖增强方式为当终端设备测量到的第一小区的接收信号 通信参数值小于或等于第一阈值时, 终端设备可以从本地或广播消 息中获取第二阈值, 判断该第一小区的接收信号的通信参数值是否 大于所述第二阈值, 若所述通信参数值大于所述第二阈值, 将所述 第一小区设置为该终端设备的服务小区。
当通信参数为接收信号强度时, 所述第二阈值包括接收信号强 度的第一最小阈值、 所述接收信号强度的第二最小阈值的偏移量与 补偿量之和, 或, 所述第二阈值包括接收信号强度的第二最小阈 值、 所述接收信号强度的第一最小阈值的偏移量与补偿量之和。 其 中, 所述接收信号强度的第二最小阈值小于所述接收信号强度的第 一最小阈值, 所述接收信号强度的第二最小阈值的偏移量小于所述 接收信号强度的第一最小阈值的偏移量。 接收信号强度的第二最小 阈值的偏移量可以用 表示, 接收信号强度的第二最小阈值 可以用 2 fevmm_ce表示。 因此, 当接收信号强度值大于第二阈值时, -^j- 用 Qrxlevmeas > ^ Qrx lev min + Qrxlev min offset _ ce ) + ^compensation ^- ^夺 测量的小区设置为该终端设备的服务小区。
当通信参数为接收信号质量时, 所述第二阈值包括接收信号质 量的第一最小阈值与所述接收信号质量的第二最小阈值的偏移量之 和, 或, 所述第二阈值包括接收信号质量的第二最小阈值与所述接 收信号质量的第一最小阈值的偏移量之和。 其中, 所述接收信号质 量的第二最小阈值小于所述接收信号质量的第一最小阈值, 所述接 收信号质量的第二最小阈值的偏移量小于所述接收信号质量的第一 最小阈值的偏移量。
接收信号质量的第二最小阈值的偏移量可以用 Q ffi" 表示, 所述接收信号质量的第二最小阈值可以用 "a nm-ce表示。 因此, 当 接 收 信 号 质 量 值 大 于 第 二 阈 值 时 , 即 可 以 用
Qqualmeas > (Qrqualmm_ce + Qqual mm offset }表示, ;]夺终端设备测量的小区设置为 该终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 1值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的接收信号强度的第二迟滞量可以用 β _εβ表示, 第二小区的接收信号强度的第二偏移量可以用 表 示 , 贝 lj = Qmeas,s + Quyst _ce ^ ^nl = Qmeas.n Q offset _ce , > 为 R准贝' J。 其中 , 所述通信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述 通信参数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
需要说明的是, 当终端设备以覆盖增强的方式选择到驻留的小 区后, 需要从该终端设备接收的广播消息中获取覆盖增强等级, 即 终端设备选择小区的等级参数。 小区等级参数包括高覆盖增强等 级、 中覆盖增强等级和低覆盖增强等级。 所述覆盖增强等级表示终 端设备驻留到适合为该终端设备提供通信服务的小区后, 该终端设 备与基站之间进行消息交互时, 可以根据终端设备测量到小区的接 收信号的通信参数值来确定使用高覆盖增强等级、 中覆盖增强等级 或低覆盖增强等级。 示例的, 当终端设备测量到小区的接收信号的 通信参数值较低时, 可以使用高覆盖增强等级。 当终端设备测量到 小区的接收信号的通信参数值较高时, 可以使用中覆盖增强等级或 低覆盖增强等级。
具体的, 如下所述的与本发明相关的实施例。
实施例二
本发明实施例提供一种终端设备 10 , 假设终端设备以覆盖增 强的方式进行初始小区选择, 如图 1 所示, 包括:
第一测量单元 101 , 用于测量第一小区的接收信号的通信参数 值, 所述第一小区是能够为所述终端设备提供通信服务的小区。
所述通信参数为接收信号强度或接收信号质量, 所述通信参数 值可以是接收信号强度值或接收信号质量值。
第一判断单元 102 , 用于判断所述通信参数值是否大于所述第 一小区的第一阈值, 所述第一阈值至少包括所述第一小区的接收信 号的通信参数的第一最小阈值与所述第一小区的接收信号的通信参 数的第一最小阈值的偏移量之和。
若测量到的接收信号的通信参数值大于第一阈值, 将所述第一 小区设置为该终端设备的服务小区。
若测量到的接收信号的通信参数值小于或等于第一阈值, 获取 第二阈值。
需要说明的是, 终端设备可以接收第一小区所属基站发送的广 播消息, 从所述广播消息中获取第一阈值。 所述第一阈值至少包括 所述通信参数的第一最小阈值与所述通信参数的第一最小阈值的偏 移量之和。
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小值, 所述 A 1为接收信号 强度值的最小值的偏移量, 所述 C为补偿量。
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小值, 所述 B 1 为接收信号质量值的 最小值的偏移量。
本发明实施例假设所述通信参数值小于或等于所述第一阈值, 获取第二阈值。
第一获取单元 103 , 用于若所述通信参数值小于或等于所述第 一阈值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述 第一小区的接收信号的通信参数的第一最小阈值与所述第一小区的 接收信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二 阈值至少包括所述第一小区的接收信号的通信参数的第二最小阈值 与所述第一小区的接收信号的通信参数的第一最小阈值的偏移量之 和。
其中, 所述通信参数的第二最小阈值小于所述通信参数的第一 最小阈值, 所述通信参数的第二最小阈值的偏移量小于所述通信参 数的第一最小阈值的偏移量。 从而所述第二阈值小于所述第一阈 值, 以便于终端设备可以将所述第一小区设置为所述终端设备的服 务小区。
需要说明的是, 当终端设备处于覆盖增强状态下时, 终端设备 可以重复检测广播消息, 直到检测到所述广播消息, 接收该广播消 息。
第二判断单元 104 , 用于判断所述通信参数值是否大于所述第 二阈值。
若测量到的第一小区的接收信号的通信参数值大于该第一小区 的第二阈值, 将所述第一小区设置为该终端设备的服务小区。
若测量到的第一小区的接收信号的通信参数值小于或等于该第 一小区的第二阈值, 获取第三阈值。
本发明实施例假设测量到的第一小区的接收信号的通信参数值 大于该第一小区的第二阈值, 将所述第一小区设置为该终端设备的 服务小区。
第一设置单元 105 , 用于若所述通信参数值大于所述第二阈 值, 将所述第一小区设置为所述终端设备的服务小区。
这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区, 使得终端设备在空闲态时, 测量到的接收信号的通信参 数值满足小区选择的要求, 从而能够使终端设备进行正常通信。
示例的, 假设通信参数为接收信号强度, 通常情况下, 测量到 第一小区的接收信号强度值可以用 表示, 第一小区的接收信 号强度的第一最小阈值可以用 m表示, 第一小区的接收信号强 可以用 ^示 ,
Figure imgf000026_0001
则当测量到的第一小区的接收信号强度值小于或等于第一阈值, 即
Qrxlevmeas < ( ^r /e min Qrxlevmmoffset ) ^compensation日于 小区 一 闹
所述第一小区的接收信号强度的第二最小阈值可以用 ^"^皿 -
Figure imgf000026_0002
或 ( wn_ee + wn ,) + compensation时, 将所述第一小区设置 为所述终端设备的服务小区。
其中 , ^compensation ~ΜαΧ ( ΡΕΜαχ - PjjMax , 0 ) , 所述 ΡΕΜαχ为第 ■小区允许终端 设备的最大上行发射功率, 从广播消息中获取 , 所述 为由 终 端 设 备 能 力 决 定 的 最 大 上 行 发 射 功 率 , 所 述
Pcompensation =M<^ ( θ)表示第一小区允许终端设备的最大上行发射 功率与由终端设备能力决定的最大上行发射功率之差和 0 之间取一 个最大值, 贝1 J所述 P dn为一个大于等于 0的值。 当 PEMax大于 ΡυΜαχ , Compensation大于 0 时, 则缩小终端设备在小区边缘的接入范围, 避免由 于终端设备发射功率不足导致掉话和接入失败等问题, 而当 于 , 等于 () 时, 则终端设备可以按照最大上行发射功率 进行小区驻留, 接入网络。 所述 Qr ^腿。 ffiet仅在终端设备周期性搜索 高优先级 PLMN ( Public Land Mobile Network , 公共陆地移动网络 ) 的情况下, 作为 dfevmin的一个补偿值使用。 所述 为终端设备 测量到的第一小区的 RSRP ( Reference Signal Receiving Power , 参 考信号接收功率) 实际值。 实际应用中, ^rxfev匪为整数型, 可以是
-70至 -22任意一个负整数 , β 也为整数型 , 可以是 1至 8任意 一个整数。
假设当测量到的第一小区的接收信号强度值 为 -45 , 第一 小区的接收信号强度的第一最小阈值 ^^ 11为 -50 , 第一小区的接收 信号强度的第一最小阈值的偏移量 Qrxlev ^ offiet为 ,, 补偿量 Compensation为
0 , 则第一阈值为 -50+7+0 , 判断测量到的第一小区的接收信号强度 值是否大于第一小区的第一阈值, 即测量到的接收信号强度值小于 第一阈值 -45<-50+7+0 , 则终端设备再从广播消息中获取第一小区 的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第 一小区的第二阈值。
假设当该广播消息包括所述第一小区的接收信号强度的第二最 小阈值 β·^^11- 为 -55 , 测量到的第一小区的接收信号强度值 为 -45 , 第一小区的接收信号强度的第一最小阈值的偏移量 ' 为 7 , 补偿量 Patin为 0 , 则第二阈值为 - 55 +7+0 , 判断测量到的第 一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到 的 第 一 小 区 的接收信号 强 度值 大于 第 一 小 区 的 第 二 阈 值 -45>-55+7+0, 则将所述第一小 区设置为所述终端设备的服务小 区。
或者, 假设当该广播消息包括第一小区的接收信号强度的第二 最小阈值的偏移量 β ee为 2 时, 测量到的第一小区的接收信号 强度值 为—45 , 第一小 区的接收信号强度的第一最小阈值
Qrxlev An为 _ 50 , 补偿量 P P 为 0 , 则第二阈值为 - 50 + 2 + 0 , 判断测量 到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即 测量到的第一小 区的接收信号强度值大于第一小区的第二阈值
-45>-50+2+0, 则将所述第一小 区设置为所述终端设备的服务小 区。
特别的, 终端设备还可以从广播消息中获取公共偏移量, 所述 公共偏移量可以用 Q 表示 , 该公共偏移量 为枚举型, 可以取
-24, -22, -20, -18, -16, -14, -12, -10, -8, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 中任意一个。 当测量到的第 小区的接收信号强度值小于或等于第一小区的第一阈值时, 利用 公共偏移量来减小第一小区的第一阈值, 以便于获得第一小区的第 二阈值, 使测量到的第一小区的接收信号强度值大于第一小区的第 二阈值, 将所述第一小区设置为该终端设备的服务小区。
示例的 假设测量到的第一小区的接收信号强度值 Q"i—为 -45, 第一小区的接收信号强度的第一最小阈值 dfevmm为 -50, 第一 小区的接收信号强度的第一最小阈值的偏移量 '—。/ 为 7, 补偿量 为 (), 公共偏移量 。 为 3 , 则第一阈值为 - 50 - 3 + 7 + 0 , 判断测 量到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到的接收信号强度值大于第二阈值 -45>-50-3+7+0 , 则将所 述第一小区设置为所述终端设备的服务小区。
需要说明的是, 终端设备在初次选择小区时, 还可以直接从本 地或广播消息中获取第一小区的接收信号强度的第二最小阈值或接 收信号强度的第二最小阈值的偏移量, 得到第一小区的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第一小区的第二 阈值, 若测量到的第一小区的接收信号强度值大于第一小区的第二 阈值, 将所述第一小区设置为该终端设备的服务小区。 这样一来, 终端设备可以快速地选择到适合终端设备驻留的小区, 缩短了终端 设备选择小区的时间, 使终端设备进行正常通信。 实施例三
本发明实施例提供一种终端设备 10 , 假设基于实施例二所述 的终端设备以覆盖增强的方式选择第一小区为服务小区, 以非覆盖 增强的方式重选第二小区, 如图 2所示, 包括:
接收单元 106 , 用于接收第一小区所属基站发送的广播消息。 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟 滞量、 所述第二小区的接收信号的通信参数的偏移量、 所述第二小 区的第二门限值、 所述第一小区的频率优先级参数、 所述第二小区 的频率优先级参数和选择小区等级参数中至少一个。
需要说明的是, 终端设备还可以重复进行广播消息的检测, 直 到检测到所述广播消息, 接收所述广播消息。
第一测量单元 101 , 用于测量第一小区的接收信号的通信参数 值, 所述第一小区是能够为所述终端设备提供通信服务的小区。
在终端设备测量第一小区的接收信号的通信参数值之前, 终端 设备开机或者从盲区进入信号覆盖区域时, 需要检测能够为所述终 端设备提供通信服务的小区, 进行小区驻留。 若终端设备没有存储 能够为所述终端设备提供通信服务的小区的信息, 则终端设备对该 终端设备支持的全频段进行搜索, 当终端设备发现较强频率的频 点, 可以对该频点的小区进行测量, 以便于终端设备驻留到该小 区。 本发明实施例假设终端设备进行全频段搜索后, 搜索到第一小 区, 该第一小区是该终端设备检测到的能够为该终端设备提供通信 服务的小区。
需要说明的是, 若终端设备存储有能够为所述终端设备提供通 信服务的小区的信息, 则该终端设备先测量所述小区, 若该小区能 够为所述终端设备提供通信服务, 该终端设备驻留到该小区。 其 中, 终端设备进行全频段搜索的过程为现有技术, 本发明实施例对 此不作贅述。
第一判断单元 102 , 用于判断所述通信参数值是否大于所述第 一小区的第一阈值, 所述第一阈值至少包括所述第一小区的接收信 号的通信参数的第一最小阈值与所述第一小区的接收信号的通信参 数的第一最小阈值的偏移量之和。
终端设备接收该第一小区所属基站发送的广播消息, 该广播消 息至少包括所述接收信号的通信参数的第一最小阈值和该接收信号 的通信参数的第一最小阈值的偏移量。
第一获取单元 103 , 用于若所述通信参数值小于或等于所述第 一阈值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述 第一小区的接收信号的通信参数的第一最小阈值与所述第一小区的 接收信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二 阈值至少包括所述第一小区的接收信号的通信参数的第二最小阈值 与所述第一小区的接收信号的通信参数的第一最小阈值的偏移量之 和。
所述通信参数的第二最小阈值小于所述通信参数的第一最小阈 一最小阈值的偏移量。 从而所述第二阈值小于所述第一阈值。
需要说明的是, 终端设备还可以从本地获取所述通信参数的第 二最小阈值或所述通信参数的第二最小阈值的偏移量。
第二判断单元 104 , 用于判断所述通信参数值是否大于所述第 二阈值。
第一设置单元 105 , 用于若所述通信参数值大于所述第二阈 值, 将所述第一小区设置为所述终端设备的服务小区。
第二测量单元 107 , 用于测量第二小区的接收信号的通信参数 值, 所述第二小区为所述第一小区的任意一个邻小区。
当终端设备测量到的第一小区的通信参数值大于第一小区的第 二阈值, 将所述第一小区设置为该终端设备的服务小区, 使终端设 备进行正常通信后, 终端设备可以持续测量第一小区的通信参数值 和第二小区的通信参数值, 所述第二小区为所述第一小区的任意一 个邻小区。
第二获取单元 108 , 用于从所述广播消息中获取所述第二小区 的第一阈值或所述第二小区的第一门限值, 所述第一阈值至少包括 所述第二小区的接收信号的通信参数的第一最小阈值与所述第二小 区的接收信号的通信参数的第一最小阈值的偏移量之和;
第三判断单元 109 , 用于判断所述通信参数值是否大于所述第 一阈值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第 一门限值。
第二设置单元 1010 , 用于若所述通信参数值大于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限 值, 将所述第二小区设置为所述终端设备的服务小区。
当终端设备从广播消息中获取到第二小区的第一阈值时, 判断 第二小区的通信参数值大于所述第一阈值, 将所述第二小区设置为 所述终端设备的服务小区。 当终端设备从广播消息中获取到第二小 区的第一门限值时, 判断所述第二小区的通信参数值与所述第一阈 值之差大于所述第一门限值, 将所述第二小区设置为所述终端设备 的服务小区。
特别的, 终端设备的第二设置单元还可以根据所述第二小区的 通信参数值与所述第一阈值之差大于所述第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
发送单元 101 1 , 用于向基站发送更新消息, 以便于所述基站 将所述更新消息透传至移动管理实体, 使得所述移动管理实体根据 所述更新消息寻呼所述终端设备, 所述更新消息包括所述第二小区 的标识和第二小区的接收信号的通信参数的第一阈值或第二小区的 第一门限值。
第二设置单元 1010 还用于若所述通信参数值小于或等于所述 第一阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所 述第一门限值, 根据所述第一小区的频率优先级与所述第二小区的 频率优先级的高低关系, 从所述广播消息中获取选择到所述第二小 区的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。
所述发送单元 101 1 还用于向基站发送更新消息, 以便于所述 基站将所述更新消息透传至移动管理实体, 使得所述移动管理实体 根据所述更新消息寻呼所述终端设备, 所述更新消息包括所述第二 小区的标识和根据第二小区频率优先级获取的所述第二小区的相应 参数。
所述第二小区的相应参数包括第一小区的接收信号的通信参数 的迟滞量、 第二小区的接收信号的通信参数的偏移量和第二小区的 第二门限值中至少一个。 这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区后, 存在第二小区的通信参数值大于所述第二小区的第一 阈值, 或, 所述第二小区的通信参数值与所述第一阈值之差大于所 述第一门限值, 使得终端设备可以重选到第二小区, 在终端设备进 行正常通信的情况下, 提高了终端设备的通信质量。 实施例四
本发明实施例提供一种终端设备 10 , 假设基于实施例二所述 的终端设备测量到第一小区的接收信号的通信参数值, 并获取到第 一小区的第一阈值, 判断第一小区的接收信号的通信参数值大于第 一小区的第一阈值, 即以非覆盖增强的方式选择第一小区为服务小 区, 以覆盖增强的方式重选第二小区, 如图 3所示, 包括:
接收单元 106 , 用于接收第一小区所属基站发送的广播消息。 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟 滞量、 所述第二小区的接收信号的通信参数的偏移量、 所述第二小 区的第二门限值、 所述第一小区的频率优先级参数、 所述第二小区 的频率优先级参数和选择小区等级参数中至少一个。
需要说明的是, 终端设备还可以重复进行广播消息的检测, 直 到检测到所述广播消息, 接收所述广播消息。
所述第一设置单元 105还用于若所述第一小区的接收信号的通 信参数值大于所述第一小区的第一阈值, 将所述第一小区设置为所 述终端设备的服务小区。
第三测量单元 1012 , 用于测量第二小区的接收信号的通信参 数值。 所述第二小区为所述第一小区的任意一个邻小区。
第三获取单元 1013 , 用于当所述第一小区的接收信号的通信 参数值小于或等于所述第一小区的第一阈值, 从所述广播消息中获 取第二小区的第二阈值, 或, 当所述第一小区的接收信号的通信参 数值与所述第一小区的第一阈值之差小于或等于第一门限值, 获取 第二小区的第二门限值。
所述第二阈值至少包括所述第二小区的接收信号的通信参数的 第二最小阈值与所述第二小区的接收信号的通信参数的第一最小阈 值的偏移量之和。
第四判断单元 1014 , 用于判断所述第二小区的接收信号的通 信参数值是否大于所述第二小区的第二阈值, 或, 所述第二小区的 接收信号的通信参数值与所述第二阈值之差是否大于所述第二门限 值。
第三设置单元 101 5 , 用于若所述通信参数值大于所述第二阈 值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限 值, 将所述第二小区设置为所述终端设备的服务小区。
当终端设备从广播消息中获取到第二小区的第二阈值时, 判断 第二小区的通信参数值大于所述第二阈值, 将所述第二小区设置为 所述终端设备的服务小区。 当终端设备从广播消息中获取到第二小 区的第二门限值时, 判断所述第二小区的通信参数值与所述第二阈 值之差大于所述第二门限值, 将所述第二小区设置为所述终端设备 的服务小区。
特别的, 终端设备的第三设置单元还可以根据所述第二小区的 通信参数值与所述第一阈值之差大于所述第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
所述发送单元 101 1 还用于向基站发送更新消息, 以便于所述 基站将所述更新消息透传至移动管理实体, 使得所述移动管理实体 根据所述更新消息寻呼所述终端设备, 所述更新消息包括所述第二 小区的标识和第二小区的接收信号的通信参数的第二阈值或第二小 区的第二门限值。
所述第三设置单元 101 5 还用于若所述第二小区的通信参数值 小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之 差小于或等于所述第二门限值, 根据所述第一小区的频率优先级与 所述第二小区的频率优先级的高低关系, 从所述广播消息中获取选 择到所述第二小区的相应参数来确定将所述第二小区设置为所述终 端设备的服务小区, 所述相应参数至少包括所述第一小区的接收信 号的通信参数的迟滞量和所述第二小区的接收信号的通信参数的偏 移量。
所述发送单元 101 1 还用于向基站发送更新消息, 以便于所述 基站将所述更新消息透传至移动管理实体, 使得所述移动管理实体 根据所述更新消息寻呼所述终端设备, 所述更新消息包括所述第二 小区的标识和根据第二小区频率优先级获取的所述第二小区的相应 参数。
这样一来, 当测量到的第一小区的接收信号的通信参数值大于 该第一小区的第一阈值时, 将所述第一小区设置为所述终端设备的 服务小区之后, 若所述第一小区的接收信号的通信参数值小于或等 于所述第一小区的第一阈值, 则从所述广播消息中获取第二小区的 第二阈值, 判断第二小区的通信参数值大于所述第二小区的第二阈 值, 或, 所述第二小区的通信参数值与所述第二阈值之差大于所述 第二门限值, 使得终端设备可以重选到第二小区, 在终端设备进行 正常通信的情况下, 提高了终端设备的通信质量。 实施例五
本发明实施例提供一种终端设备, 在终端设备重选到第一小区 的邻小区, 即能够为该终端设备提供通信服务的第二小区时, 若第 二小区的通信参数值小于或等于所述第二小区的第一阈值, 终端设 备需要根据第二小区的载频优先级与第一小区的载频优先级的高低 关系, 从所述广播消息中获取选择到所述第二小区的相应参数, 选 择不同的测量启动规则, 来确定将所述第二小区设置为所述终端设 备的服务小区, 以便于使终端设备进行正常通信。
通常情况下, 小区的载频优先级在基站中配置, 通过基站向终 端设备发送广播消息的方式告知终端设备小区的载频优先级, 所述 广播消息中携带有小区的载频优先级。 终端设备重选小区时可以用 cellReselectionPriority 表示小区的载频优先级, 所述小区的载频优 先级取值范围为 0 到 7 , 该小区的载频优先级的值越大, 表示对应 载频上所有小区的重选优先级越高。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 R"i 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 β 表示, 则
Rs = Qmeas,S + Qnyst和 Rn = QmeaS,n _ Qoffiet , 即 ?„ > 为 R 准贝 |J , 所述 Qnyst和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
同理, 在终端设备重选到第一小区的邻小区, 即能够为该终端 设备提供通信服务的第二小区时, 当第一小区的通信参数值小于或 等于所述第二小区的第一阈值, 第二小区的通信参数值小于或等于 所述第二小区的第二阈值, 终端设备需要根据第二小区的载频优先 级与第一小区的载频优先级的高低关系, 从所述广播消息中获取选 择到所述第二小区的相应参数, 选择不同的测量启动规则, 来确定 将所述第二小区设置为所述终端设备的服务小区, 以便于使终端设 备进行正常通信。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 1值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 β 表示, 则
Rs = QmeaS,S + Qtfyst和 Rn = QmeaS,n _ Qoffiet , 即 R« > 为 R 准贝 'J , 所述 ^Hyst和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q '― 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
示例的, 当终端设备以覆盖增强的方式选择到第一小区, 将第 一小区设置为该终端设备的服务小区后, 若终端设备从接收信号较 弱的地方移动到接收信号较强的地方, 存在第二小区的接收信号较 强, 终端设备以非覆盖增强的方式重选到第二小区, 但是要当端设 备从接收信号较强的地方又移动到接收信号较弱的地方时, 此时所 述第二小区的接收信号也较弱, 则终端设备测量到的接收信号的通 信参数值无法满足 S 准则, 则终端设备通过判断第一小区的频率优 先级与第二小区的频率优先级的方式进行小区重选。
当终端设备以非覆盖增强的方式选择到第一小区, 将第一小区 设置为该终端设备的服务小区后, 若终端设备从接收信号较强的地 方移动到接收信号较弱的地方, 存在第二小区的接收信号较弱, 终 端设备以覆盖增强的方式重选到第二小区, 此时, 终端设备的优先 级可以是第一小区的频率优先级低于第二小区的频率优先级。 且终 端设备还可以通过判断第一小区的频率优先级与第二小区的频率优 先级的方式进行小区重选。
这样一来, 当终端设备以非覆盖增强方式选择到第二小区, 将 第二小区设置为该终端设备的服务小区后, 当第二小区的通信参数 值小于或等于所述第二小区的第一阈值时, 或当终端设备以覆盖增 强方式选择到第二小区, 将第二小区设置为该终端设备的服务小区 后, 当第一小区的通信参数值小于或等于所述第二小区的第一阈 值, 或第二小区的通信参数值小于或等于所述第二小区的第二阈值 时, 终端设备可以根据第二小区的载频优先级与第一小区的载频优 先级的高低关系, 从所述广播消息中获取选择到所述第二小区的相 应参数, 选择不同的测量启动规则, 来确定将所述第二小区设置为 所述终端设备的服务小区, 以便于使终端设备进行正常通信。 实施例六
本发明实施例提供一种基站 20 , 如图 4所示, 包括:
获取单元 201 , 用于获取广播消息。
所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞 量、 第二小区的接收信号的通信参数的偏移量和所述第二小区的第 二门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率 优先级参数和选择小区等级参数中至少一个, 所述第二小区为所述 第一小区的邻小区。
发送单元 202 , 用于向终端设备发送广播消息, 以便于所述终 端设备根据所述广播消息选择小区。
所述获取单元 201具体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述小区信息。
所述发送单元 202还用于:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
所述基站 20还包括:
接收单元 203 , 用于接收所述终端设备发送的更新消息。
所述更新消息包括所述第二小区的标识、 所述第一小区的接收 信号的通信参数的迟滞量、 所述第二小区的接收信号的通信参数的 偏移量和第二门限值中至少一个, 以便于将所述更新消息透传至移 动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述终 端设备。
这样一来, 基站通过获取广播消息, 向终端设备发送该广播消 息, 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞 量、 第二小区的接收信号的通信参数的偏移量和所述第二小区的第 二门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率 优先级参数和选择小区等级参数中至少一个, 所述第二小区为所述 第一小区的邻小区, 以便于所述终端设备根据所述广播消息选择小 区, 使得所述终端设备能够进行正常通信, 并接收所述终端设备发 送的更新消息, 以便于将所述更新消息透传至移动管理实体, 使得 所述移动管理实体根据所述更新消息寻呼所述终端设备。 实施例七
本发明实施例提供一种通信系统 30 , 如图 5所示, 包括: 终端设备 301和基站 302 ,
假设所述终端设备 301 以覆盖增强的方式进行初始小区选择, 用于测量第一小区的接收信号的通信参数值, 所述第一小区是能够 为所述终端设备提供通信服务的小区; 判断所述通信参数值是否大 于所述第一小区的第一阈值, 所述第一阈值至少包括所述第一小区 的接收信号的通信参数的第一最小阈值与所述第一小区的接收信号 的通信参数的第一最小阈值的偏移量之和; 若所述通信参数值小于 或等于所述第一阈值, 从广播消息中获取第二阈值, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第一最小阈值与所 述第一小区的接收信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值至少包括所述第一小区的接收信号的通信参数的 第二最小阈值与所述第一小区的接收信号的通信参数的第一最小阈 值的偏移量之和; 判断所述通信参数值是否大于所述第二阈值; 若 所述通信参数值大于所述第二阈值, 将所述第一小区设置为所述终 端设备的服务小区。
假设所述终端设备 301基于以覆盖增强的方式进行初始小区选 择, 以非覆盖增强的方式重选第二小区, 用于在所述将所述第一小 区设置为所述终端设备的服务小区之后, 测量第二小区的接收信号 的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区; 从所述广播消息中获取所述第二小区的第一阈值或所述第二小区的 第一门限值, 所述第一阈值至少包括所述第二小区的接收信号的通 信参数的第一最小阈值与所述第二小区的接收信号的通信参数的第 一最小阈值的偏移量之和; 判断所述通信参数值是否大于所述第一 阈值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一 门限值; 若所述通信参数值大于所述第一阈值, 或, 所述通信参数 值与所述第一阈值之差大于所述第一门限值, 将所述第二小区设置 为所述终端设备的服务小区; 若所述通信参数值小于或等于所述第 一阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述 第一门限值, 根据所述第一小区的频率优先级与所述第二小区的频 率优先级的高低关系, 从所述广播消息中获取选择到所述第二小区 的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。
假设所述终端设备 301基于终端设备 301 测量到第一小区的接 收信号的通信参数值, 并获取到第一小区的第一阈值, 判断第一小 区的接收信号的通信参数值大于第一小区的第一阈值, 即以非覆盖 增强的方式选择第一小区为服务小区, 以覆盖增强的方式重选第二 小区, 在所述判断所述通信参数值是否大于所述第一小区的第一阈 值之后,
若所述第一小区的接收信号的通信参数值大于所述第一小区的 第一阈值, 将所述第一小区设置为所述终端设备的服务小区;
测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区; 当所述第一小区的接收信号的通信参 数值小于或等于所述第一小区的第一阈值, 从所述广播消息中获取 第二小区的第二阈值, 所述第二阈值至少包括所述第二小区的接收 信号的通信参数的第二最小阈值与所述第二小区的接收信号的通信 参数的第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信 号的通信参数值与所述第一小区的第一阈值之差小于或等于第一门 限值, 获取第二小区的第二门限值;
判断所述第二小区的接收信号的通信参数值是否大于所述第二 小区的第二阈值, 或, 所述第二小区的接收信号的通信参数值与所 述第二阈值之差是否大于所述第二门限值;
若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与 所述第二阈值之差大于所述第二门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述第二小区的通信参数值小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优先级的高 低关系, 从所述广播消息中获取选择到所述第二小区的相应参数来 确定将所述第二小区设置为所述终端设备的服务小区, 所述相应参 数至少包括所述第一小区的接收信号的通信参数的迟滞量和所述第 二小区的接收信号的通信参数的偏移量。
需要说明的是, 在所述测量第一小区的接收信号的通信参数值 或测量第二小区的接收信号的通信参数值之前,
终端设备需要先接收第一小区所属基站发送的广播消息, 所述 广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小 阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二 门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优 先级参数和选择小区等级参数中至少一个。
特别的, 终端设备还可以重复进行所述广播消息的检测, 直到 检测到所述广播消息, 接收所述广播消息。
进一步的, 在所述将所述第二小区设置为所述终端设备的服务 小区之后,
终端设备需要向基站发送更新消息, 以便于所述基站将所述更 新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新 消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量和第 二门限值中至少一个。
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
所述基站 302用于获取广播消息, 所述广播消息包括通信参数 的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小 区的接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参 数的偏移量和所述第二小区的第二门限值、 所述第一小区的频率优 先级参数、 所述第二小区的频率优先级参数和选择小区等级参数中 至少一个, 所述第二小区为所述第一小区的邻小区; 向终端设备发 送广播消息, 以便于所述终端设备根据所述广播消息选择小区。
特别的, 基站可以从本地或从第二基站向所述第一基站发送的 请求消息、 响应消息或更新消息中获取所述广播消息。
基站可以重复向所述终端设备发送所述广播消息, 以便于所述 终端设备根据所述广播消息选择小区。
进一步的, 在所述向终端设备发送广播消息之后, 接收所述终端设备发送的更新消息, 所述更新消息包括所述第 二小区的标识、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量和第二门限值中至少一 个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管 理实体根据所述更新消息寻呼所述终端设备。 实施例八
本发明实施例提供一种终端设备 40 , 如图 6所示, 包括: 处理器 401 , 用于测量第一小区的接收信号的通信参数值, 所 述第一小区是能够为所述终端设备提供通信服务的小区。
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为 A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
所述处理器 401还用于判断所述通信参数值是否大于所述第一 小区的第一阈值。
所述第一阈值至少包括所述第一小区的接收信号的通信参数的 第一最小阈值与所述第一小区的接收信号的通信参数的第一最小阈 值的偏移量之和。 所述第一小区的接收信号的通信参数的第一最小 阈值与所述第一小区的接收信号的通信参数的第一最小阈值的偏移 量可以从本地获取也可以从第一小区所属基站发送的广播消息中获 取。
所述处理器 401还用于若所述通信参数值小于或等于所述第一 阈值, 从广播消息中获取第二阈值。 所述第二阈值至少包括所述第一小区的接收信号的通信参数的 第一最小阈值与所述第一小区的接收信号的通信参数的第二最小阈 值的偏移量之和, 或, 所述第二阈值至少包括所述第一小区的接收 信号的通信参数的第二最小阈值与所述第一小区的接收信号的通信 参数的第一最小阈值的偏移量之和。
所述处理器 401还用于判断所述通信参数值是否大于所述第二 阈值。
所述处理器 401还用于若所述通信参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的服务小区。
这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区, 使得终端设备在空闲态时, 测量到的接收信号的通信参 数值满足小区选择的要求, 从而能够使终端设备进行正常通信。
所述处理器 401 还用于测量第二小区的接收信号的通信参数 值, 所述第二小区为所述第一小区的任意一个邻小区;
所述处理器 401还用于从所述广播消息中获取所述第二小区的 第一阈值或所述第二小区的第一门限值。
所述第一阈值至少包括所述第二小区的接收信号的通信参数的 第一最小阈值与所述第二小区的接收信号的通信参数的第一最小阈 值的偏移量之和。
所述处理器 401还用于判断所述通信参数值是否大于所述第一 阈值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一 门限值。
所述处理器 401还用于若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限值, 将 所述第二小区设置为所述终端设备的服务小区。 所述处理器 40 1还用于若所述通信参数值小于或等于所述第一 阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述第 一门限值, 根据所述第一小区的频率优先级与所述第二小区的频率 优先级的高低关系, 从所述广播消息中获取选择到所述第二小区的 相应参数来确定将所述第二小区设置为所述终端设备的服务小区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的迟滞 量和所述第二小区的接收信号的通信参数的偏移量。
这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区后, 存在第二小区的通信参数值大于所述第二小区的第一 阈值, 或, 所述第二小区的通信参数值与所述第一阈值之差大于所 述第一门限值, 使得终端设备可以重选到第二小区, 在终端设备进 行正常通信的情况下, 提高了终端设备的通信质量。
示例的, 假设通信参数为接收信号强度, 通常情况下, 测量到 第一小区的接收信号强度值可以用 表示, 第一小区的接收信 号强度的第一最小阈值可以用 m表示, 第一小区的接收信号强 度的第一最小阈值的偏移量可以用 表示, 补偿量可以用 示 , 第 "阈值可以用 (^r fevmin + Qrxlevmmoffset ) + ^compensation 示 , 则当测量到的第一小区的接收信号强度值小于或等于第一阈值, 即
Qrxlevmeas < ^ ^r /e min Qrxlevmmoffset ) ^compensation日于 .小 区 一 闹
所述第一小区的接收信号强度的第二最小阈值可以用 η-
Figure imgf000047_0001
Qrxlevmeas > ( Qrxlev mn_ ce + Qrxlev m offset ) + ^compensation日于 ^夺戶斤 小区 为所述终端设备的服务小区。
其中 , ^compensation ~MaX ( PEUax _ [/Μ。χ,0) , 所述 ΡΕΜαχ为第 ■小区允许终端 设备的最大上行发射功率, 从广播消息中获取 PEM , 所述 为由 终 端 设 备 能 力 决 定 的 最 大 上 行 发 射 功 率 , 所 述 表示第一小区允许终端设备的最大上行发射 功率与由终端设备能力决定的最大上行发射功率之差和 0 之间取一 个最大值, 贝1 J所述 Ρ,α"为一个大于等于 0的值。 当 PEMax大于 ΡυΜαχ , Compensation大于 0 时, 则缩小终端设备在小区边缘的接入范围, 避免由 于终端设备发射功率不足导致掉话和接入失败等问题, 而当 、 于 Ρυ , Pcompensation等于 () 时, 则终端设备可以按照最大上行发射功率 进行小区驻留, 接入网络。 所述 Qr ^腿。ffiet仅在终端设备周期性搜索 高优先级 PLMN ( Public Land Mobile Network , 公共陆地移动网络 ) 的情况下, 作为 dfevmin的一个补偿值使用。 所述 Qrd―为终端设备 测量到的第一小区的 RSRP ( Reference Signal Receiving Power , 参 考信号接收功率) 实际值。 实际应用中, 匪为整数型, 可以是
-70至 -22任意一个负整数 , 0 匪。 也为整数型 , 可以是 1至 8任意 一个整数。
假设当测量到的第一小区的接收信号强度值 为 -45 , 第一 小区的接收信号强度的第一最小阈值 ^^^匪为 -50 , 第一小区的接收 信号强度的第一最小阈值的偏移量 Qrxlev ^ offiet为 ,, 补偿量 Compensation为
0 , 则第一阈值为 -50+7+0 , 判断测量到的第一小区的接收信号强度 值是否大于第一小区的第一阈值, 即测量到的接收信号强度值小于 第一阈值 -45<-50+7+0 , 则终端设备再从广播消息中获取第一小区 的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第 一小区的第二阈值。
假设当该广播消息包括所述第一小区的接收信号强度的第二最 小阈值 ^^^n- 为 -55 , 测量到的第一小区的接收信号强度值 为—45 , 第一小区的接收信号强度的第一最小阈值的偏移量
为 7 , 补偿量 Ρ,—为 0 , 则第二阈值为 - 55 +7+0 , 判断测量到的第 一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到 的 第 一 小 区 的接收信号 强 度值 大于 第 一 小 区 的 第 二 阈 值 -45>-55+7+0, 则将所述第一小 区设置为所述终端设备的服务小 区。
或者, 假设当该广播消息包括第一小区的接收信号强度的第二 最小阈值的偏移量 为 2 时, 测量到的第一小区的接收信号 强度值 为—45 , 第一小 区的接收信号强度的第一最小阈值
Qrxlevv^n为 50 , 补偿量 为 0 , 则第二阈值为 - 50 + 2 + 0 , 判断测量 到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即 测量到的第一小 区的接收信号强度值大于第一小区的第二阈值
-45>-50+2+0 则将所述第一小 区设置为所述终端设备的服务小 区。
特别的, 终端设备还可以从广播消息中获取公共偏移量, 所述 公共偏移量可以用 Q 表示 , 该公共偏移量 Qffiet为枚举型, 可以取
-24, -22, -20, -18, -16, -14, -12, -10, -8, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 中任意一个。 当测量到的第 一小区的接收信号强度值小于或等于第一小区的第一阈值时, 利用 公共偏移量来减小第一小区的第一阈值, 以便于获得第一小区的第 二阈值, 使测量到的第一小区的接收信号强度值大于第一小区的第 二阈值, 将所述第一小区设置为该终端设备的服务小区。
示例的, 假设测量到的第一小区的接收信号强度值 Q"i—为 -45, 第一小区的接收信号强度的第一最小阈值 dfevmm为 -50, 第一 小区的接收信号强度的第一最小阈值的偏移量0 为 7, 补偿量
Compensation为 (), 公共偏移量 QffSet3 , 则第一阈值为 - 50 - 3 + 7 + 0 , 判断测 量到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到的接收信号强度值大于第二阈值 -45>-50-3+7+0, 则将所 述第一小区设置为所述终端设备的服务小区。
需要说明的是, 终端设备在初次选择小区时, 还可以直接从本 地或广播消息中获取第一小区的接收信号强度的第二最小阈值或接 收信号强度的第二最小阈值的偏移量, 得到第一小区的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第一小区的第二 阈值, 若测量到的第一小区的接收信号强度值大于第一小区的第二 阈值, 将所述第一小区设置为该终端设备的服务小区。 这样一来, 终端设备可以快速地选择到适合终端设备驻留的小区, 缩短了终端 设备选择小区的时间, 使终端设备进行正常通信。
所述处理器 401还用于若所述第一小区的接收信号的通信参数 值大于所述第一小区的第一阈值, 将所述第一小区设置为所述终端 设备的服务小区。
所述处理器 401 还用于测量第二小区的接收信号的通信参数 值, 所述第二小区为所述第一小区的任意一个邻小区。
所述处理器 401还用于当所述第一小区的接收信号的通信参数 值小于或等于所述第一小区的第一阈值, 从所述广播消息中获取第 二小区的第二阈值, 所述第二阈值至少包括所述第二小区的接收信 号的通信参数的第二最小阈值与所述第二小区的接收信号的通信参 数的第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信号 的通信参数值与所述第一小区的第一阈值之差小于或等于第一门限 值, 获取第二小区的第二门限值。
所述处理器 401还用于判断所述第二小区的接收信号的通信参 数值是否大于所述第二小区的第二阈值, 或, 所述第二小区的接收 信号的通信参数值与所述第二阈值之差是否大于所述第二门限值。
所述处理器 401还用于若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限值, 将 所述第二小区设置为所述终端设备的服务小区。
所述处理器 401还用于若所述第二小区的通信参数值小于或等 于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或 等于所述第二门限值, 根据所述第一小区的频率优先级与所述第二 小区的频率优先级的高低关系, 从所述广播消息中获取选择到所述 第二小区的相应参数来确定将所述第二小区设置为所述终端设备的 服务小区, 所述相应参数至少包括所述第一小区的接收信号的通信 参数的迟滞量和所述第二小区的接收信号的通信参数的偏移量。
这样一来, 当测量到的第一小区的接收信号的通信参数值大于 该第一小区的第一阈值时, 将所述第一小区设置为所述终端设备的 服务小区之后, 若所述第一小区的接收信号的通信参数值小于或等 于所述第一小区的第一阈值, 则从所述广播消息中获取第二小区的 第二阈值, 判断第二小区的通信参数值大于所述第二小区的第二阈 值, 或, 所述第二小区的通信参数值与所述第二阈值之差大于所述 第二门限值, 使得终端设备可以重选到第二小区, 在终端设备进行 正常通信的情况下, 提高了终端设备的通信质量。
所述终端设备 40还包括:
接收机 402 , 用于接收第一小区所属基站发送的广播消息。 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟 滞量、 所述第二小区的接收信号的通信参数的偏移量、 所述第二小 区的第二门限值、 所述第一小区的频率优先级参数、 所述第二小区 的频率优先级参数和选择小区等级参数中至少一个。
所述接收机 402还用于:
重复进行所述第二广播消息的检测, 直到检测到所述第二广播 消息, 接收所述第二广播消息。 所述终端设备 40还包括:
发射机 403 , 用于向基站发送更新消息, 以便于所述基站将所 述更新消息透传至移动管理实体, 使得所述移动管理实体根据所述 更新消息寻呼所述终端设备。
所述更新消息包括所述第二小区的标识、 接收信号的通信参数 的迟滞量、 接收信号的通信参数的偏移量和第二门限值中至少一 个。 实施例九
本发明实施例提供一种终端设备, 在终端设备重选到第一小区 的邻小区, 即能够为该终端设备提供通信服务的第二小区时, 若第 二小区的通信参数值小于或等于所述第二小区的第一阈值, 终端设 备需要根据第二小区的载频优先级与第一小区的载频优先级的高低 关系, 从所述广播消息中获取选择到所述第二小区的相应参数, 选 择不同的测量启动规则, 来确定将所述第二小区设置为所述终端设 备的服务小区, 以便于使终端设备进行正常通信。
通常情况下, 小区的载频优先级在基站中配置, 通过基站向终 端设备发送广播消息的方式告知终端设备小区的载频优先级, 所述 广播消息中携带有小区的载频优先级。 终端设备重选小区时可以用 cellReselectionPriority 表示小区的载频优先级, 所述小区的载频优 先级取值范围为 0 到 7 , 该小区的载频优先级的值越大, 表示对应 载频上所有小区的重选优先级越高。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 值, 若所述 值小于所述 值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 δ。/ 表示, 则
Rs = QmeaS,S + Quyst和 R» = QmeaS,n _ Qoffiet , 即 ^ > 为 R 准贝 'J , 所述 ^yst和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q '― 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , R„l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
同理, 在终端设备重选到第一小区的邻小区, 即能够为该终端 设备提供通信服务的第二小区时, 当第一小区的通信参数值小于或 等于所述第二小区的第一阈值, 第二小区的通信参数值小于或等于 所述第二小区的第二阈值, 终端设备需要根据第二小区的载频优先 级与第一小区的载频优先级的高低关系, 从所述广播消息中获取选 择到所述第二小区的相应参数, 选择不同的测量启动规则, 来确定 将所述第二小区设置为所述终端设备的服务小区, 以便于使终端设 备进行正常通信。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 2。/ 表示, 则
Rs = QmeaS,S + Quyst和 R» = QmeaS,n _ Qoffiet , 即 ^ > 为 R 准贝 'J , 所述 ^yst和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q '― 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
示例的, 当终端设备以覆盖增强的方式选择到第一小区, 将第 一小区设置为该终端设备的服务小区后, 若终端设备从接收信号较 弱的地方移动到接收信号较强的地方, 存在第二小区的接收信号较 强, 终端设备以非覆盖增强的方式重选到第二小区, 但是要当端设 备从接收信号较强的地方又移动到接收信号较弱的地方时, 此时所 述第二小区的接收信号也较弱, 则终端设备测量到的接收信号的通 信参数值无法满足 S 准则, 则终端设备通过判断第一小区的频率优 先级与第二小区的频率优先级的方式进行小区重选。
当终端设备以非覆盖增强的方式选择到第一小区, 将第一小区 设置为该终端设备的服务小区后, 若终端设备从接收信号较强的地 方移动到接收信号较弱的地方, 存在第二小区的接收信号较弱, 终 端设备以覆盖增强的方式重选到第二小区, 此时, 终端设备的优先 级可以是第一小区的频率优先级低于第二小区的频率优先级。 且终 端设备还可以通过判断第一小区的频率优先级与第二小区的频率优 先级的方式进行小区重选。
这样一来, 当终端设备以非覆盖增强方式选择到第二小区, 将 第二小区设置为该终端设备的服务小区后, 当第二小区的通信参数 值小于或等于所述第二小区的第一阈值时, 或当终端设备以覆盖增 强方式选择到第二小区, 将第二小区设置为该终端设备的服务小区 后, 当第一小区的通信参数值小于或等于所述第二小区的第一阈 值, 或第二小区的通信参数值小于或等于所述第二小区的第二阈值 时, 终端设备可以根据第二小区的载频优先级与第一小区的载频优 先级的高低关系, 从所述广播消息中获取选择到所述第二小区的相 应参数, 选择不同的测量启动规则, 来确定将所述第二小区设置为 所述终端设备的服务小区, 以便于使终端设备进行正常通信。 实施例九
本发明实施例提供一种基站 50 , 如图 7所示, 包括:
处理器 501 , 用于获取广播消息。
广播消息包括通信参数的第二最小阈值、 所述通信参数的第二 最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞量、 第 二小区的接收信号的通信参数的偏移量和所述第二小区的第二门限 值、 所述第一小区的频率优先级参数、 所述第二小区的频率优先级 参数和选择小区等级参数中至少一个, 所述第二小区为所述第一小 区的邻小区。
发射机 502 , 用于向终端设备发送广播消息, 以便于所述终端 设备根据所述广播消息选择小区。
所述处理器 501具体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述小区信息。
所述处理器 501还用于:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。 所述基站 50还包括:
接收机 503 , 用于接收所述终端设备发送的更新消息。
所述更新消息包括所述第二小区的标识、 所述第一小区的接收 信号的通信参数的迟滞量、 所述第二小区的接收信号的通信参数的 偏移量和第二门限值中至少一个, 以便于将所述更新消息透传至移 动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述终 端设备。
这样一来, 基站通过获取广播消息, 向终端设备发送该广播消 息, 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞 量、 第二小区的接收信号的通信参数的偏移量和所述第二小区的第 二门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率 优先级参数和选择小区等级参数中至少一个, 所述第二小区为所述 第一小区的邻小区, 以便于所述终端设备根据所述广播消息选择小 区, 使得所述终端设备能够进行正常通信, 并接收所述终端设备发 送的更新消息, 以便于将所述更新消息透传至移动管理实体, 使得 所述移动管理实体根据所述更新消息寻呼所述终端设备。 实施例十
本发明实施例提供一种通信系统 60 , 如图 8所示, 包括: 终端设备 601和基站 602 ,
假设所述终端设备 601 以覆盖增强的方式进行初始小区选择, 用于测量第一小区的接收信号的通信参数值, 所述第一小区是能够 为所述终端设备提供通信服务的小区; 判断所述通信参数值是否大 于所述第一小区的第一阈值, 所述第一阈值至少包括所述第一小区 的接收信号的通信参数的第一最小阈值与所述第一小区的接收信号 的通信参数的第一最小阈值的偏移量之和; 若所述通信参数值小于 或等于所述第一阈值, 从广播消息中获取第二阈值, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第一最小阈值与所 述第一小区的接收信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值至少包括所述第一小区的接收信号的通信参数的 第二最小阈值与所述第一小区的接收信号的通信参数的第一最小阈 值的偏移量之和; 判断所述通信参数值是否大于所述第二阈值; 若 所述通信参数值大于所述第二阈值, 将所述第一小区设置为所述终 端设备的服务小区。
假设所述终端设备 601基于以覆盖增强的方式进行初始小区选 择, 以非覆盖增强的方式重选第二小区, 用于在所述将所述第一小 区设置为所述终端设备的服务小区之后, 测量第二小区的接收信号 的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区; 从所述广播消息中获取所述第二小区的第一阈值或所述第二小区的 第一门限值, 所述第一阈值至少包括所述第二小区的接收信号的通 信参数的第一最小阈值与所述第二小区的接收信号的通信参数的第 一最小阈值的偏移量之和; 判断所述通信参数值是否大于所述第一 阈值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一 门限值; 若所述通信参数值大于所述第一阈值, 或, 所述通信参数 值与所述第一阈值之差大于所述第一门限值, 将所述第二小区设置 为所述终端设备的服务小区; 若所述通信参数值小于或等于所述第 一阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述 第一门限值, 根据所述第一小区的频率优先级与所述第二小区的频 率优先级的高低关系, 从所述广播消息中获取选择到所述第二小区 的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。
假设所述终端设备 601基于终端设备 601 测量到第一小区的接 收信号的通信参数值, 并获取到第一小区的第一阈值, 判断第一小 区的接收信号的通信参数值大于第一小区的第一阈值, 即以非覆盖 增强的方式选择第一小区为服务小区, 以覆盖增强的方式重选第二 小区, 在所述判断所述通信参数值是否大于所述第一小区的第一阈 值之后,
若所述第一小区的接收信号的通信参数值大于所述第一小区的 第一阈值, 将所述第一小区设置为所述终端设备的服务小区;
测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区; 当所述第一小区的接收信号的通信参 数值小于或等于所述第一小区的第一阈值, 从所述广播消息中获取 第二小区的第二阈值, 所述第二阈值至少包括所述第二小区的接收 信号的通信参数的第二最小阈值与所述第二小区的接收信号的通信 参数的第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信 号的通信参数值与所述第一小区的第一阈值之差小于或等于第一门 限值, 获取第二小区的第二门限值;
判断所述第二小区的接收信号的通信参数值是否大于所述第二 小区的第二阈值, 或, 所述第二小区的接收信号的通信参数值与所 述第二阈值之差是否大于所述第二门限值;
若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与 所述第二阈值之差大于所述第二门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述第二小区的通信参数值小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优先级的高 低关系, 从所述广播消息中获取选择到所述第二小区的相应参数来 确定将所述第二小区设置为所述终端设备的服务小区, 所述相应参 数至少包括所述第一小区的接收信号的通信参数的迟滞量和所述第 二小区的接收信号的通信参数的偏移量。
需要说明的是, 在所述测量第一小区的接收信号的通信参数值 或测量第二小区的接收信号的通信参数值之前,
终端设备需要先接收第一小区所属基站发送的广播消息, 所述 广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小 阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二 门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优 先级参数和选择小区等级参数中至少一个。
特别的, 终端设备还可以重复进行所述广播消息的检测, 直到 检测到所述广播消息, 接收所述广播消息。
进一步的, 在所述将所述第二小区设置为所述终端设备的服务 小区之后,
终端设备需要向基站发送更新消息, 以便于所述基站将所述更 新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新 消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量和第 二门限值中至少一个。
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
所述基站 602用于获取广播消息, 所述广播消息包括通信参数 的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小 区的接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参 数的偏移量和所述第二小区的第二门限值、 所述第一小区的频率优 先级参数、 所述第二小区的频率优先级参数和选择小区等级参数中 至少一个, 所述第二小区为所述第一小区的邻小区; 向终端设备发 送广播消息, 以便于所述终端设备根据所述广播消息选择小区。
特别的, 基站可以从本地或从第二基站向所述第一基站发送的 请求消息、 响应消息或更新消息中获取所述广播消息。
基站可以重复向所述终端设备发送所述广播消息, 以便于所述 终端设备根据所述广播消息选择小区。
进一步的, 在所述向终端设备发送广播消息之后,
接收所述终端设备发送的更新消息, 所述更新消息包括所述第 二小区的标识、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量和第二门限值中至少一 个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管 理实体根据所述更新消息寻呼所述终端设备。 实施例十一
本发明实施例一种选择小区的方法, 如图 9所示, 应用于终端 设备, 假设终端设备以覆盖增强的方式进行初始小区选择, 包括: 步骤 701、 测量第一小区的接收信号的通信参数值, 所述第一 小区是能够为所述终端设备提供通信服务的小区。
在终端设备测量第一小区的接收信号的通信参数值之前, 终端 设备开机或者从盲区进入信号覆盖区域时, 需要检测能够为所述终 端设备提供通信服务的小区, 进行小区驻留。 若终端设备没有存储 能够为所述终端设备提供通信服务的小区的信息, 则终端设备对该 终端设备支持的全频段进行搜索, 当终端设备发现较强频率的频 点, 可以对该频点的小区进行测量, 以便于终端设备驻留到该小 区。 本发明实施例假设终端设备进行全频段搜索后, 搜索到第一小 区, 该第一小区是该终端设备检测到的能够为该终端设备提供通信 服务的小区。
需要说明的是, 若终端设备存储有能够为所述终端设备提供通 信服务的小区的信息, 则该终端设备先测量所述小区, 若该小区能 够为所述终端设备提供通信服务, 该终端设备驻留到该小区。 其 中, 终端设备进行全频段搜索的过程为现有技术, 本发明实施例对 此不作贅述。
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所述 B 为接收信号质量值的最小阈值, 所述 B 1 为接收信号质量值 的最小阈值的偏移量。
步骤 702、 判断所述通信参数值是否大于所述第一小区的第一 阈值, 所述第一阈值至少包括所述第一小区的接收信号的通信参数 的第一最小阈值与所述第一小区的接收信号的通信参数的第一最小 阈值的偏移量之和。
首先, 终端设备接收该第一小区所属基站发送的广播消息, 从 该广播消息中获取所述第一小区的接收信号的通信参数的第一最小 阈值和该接收信号的通信参数的第一最小阈值的偏移量。
需要说明的是, 若测量到的第一小区的接收信号的通信参数值 小于或等于第一阈值, 该终端设备可以继续搜索全频段内的其他小 区, 当搜索到小区时, 该终端设备可以对所述小区进行测量, 判断 测量到的接收信号的通信参数值是否大于所述小区的阈值, 若搜索 到的所述小区的测量到的接收信号的通信参数值小于或等于所述小 区的阈值, 且经过搜索和判断后不存在能够为所述终端设备提供通 信服务的小区, 对测量到的每个小区的接收信号的通信参数值进行 从高到低的顺序排序, 再通过调节接收信号的通信参数的最高的小 区的阈值, 使测量到的接收信号通信参数大于所述小区的阈值。
本发明实施例假设所述通信参数值小于或等于所述第一阈值, 执行步骤 703。
步骤 703、 若所述通信参数值小于或等于所述第一阈值, 从广 播消息中获取第二阈值, 所述第二阈值至少包括所述第一小区的接 收信号的通信参数的第一最小阈值与所述第一小区的接收信号的通 信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值至少包括 所述第一小区的接收信号的通信参数的第二最小阈值与所述第一小 区的接收信号的通信参数的第一最小阈值的偏移量之和
需要说明的是, 还可以从本地获取所述第一小区的通信参数的 第二最小阈值或所述第一小区的通信参数的第二最小阈值的偏移 量。 终端设备可以重复检测该广播消息, 直到检测到所述广播消 息, 接收该广播消息。
当该广播消息包括所述接收信号强度的第二最小阈值时, 所述 第二阈值包括该接收信号强度的第二最小阈值、 该接收信号强度的 第一最小阈值的偏移量和补偿量之和。 当该广播消息包括该接收信 号强度的第二最小阈值的偏移量时, 所述第二阈值包括该接收信号 强度的第一最小阈值、 该接收信号强度的第二最小阈值的偏移量和 补偿量之和。 其中, 该接收信号强度的第二最小阈值小于该接收信 号强度的第一最小阈值, 该接收信号强度的第二最小阈值的偏移量 小于该接收信号强度的第一最小阈值的偏移量。
步骤 704、 判断所述通信参数值是否大于所述第二阈值。
所述第一小区的通信参数的第二最小阈值小于所述通信参数的 第一最小阈值, 所述通信参数的第二最小阈值的偏移量小于所述通 信参数的第一最小阈值的偏移量。 从而所述第一小区的第二阈值小 于所述第一小区的第一阈值。
若所述通信参数值大于所述第二阈值, 执行步骤 705。
本发明实施例假设所述通信参数值大于所述第二阈值, 执行步 骤 705。
步骤 705、 若所述通信参数值大于所述第二阈值, 将所述第一 小区设置为所述终端设备的服务小区。
在将所述第一小区设置为终端设备的服务小区之后, 测量第二 小区的接收信号的通信参数值, 且持续监测所述第一小区的接收信 号的通信参数值, 所述第二小区为所述第一小区的任意一个邻小 区。 从广播消息中获取该第二小区的所述通信参数的第一最小阈值 或所述通信参数的第一最小阈值的偏移量, 判断所述第二小区的通 信参数值是否大于所述第二小区的第一阈值, 若所述通信参数值大 于所述第一阈值, 将该第二小区设置为所述终端设备的服务小区。 若所述通信参数值小于或等于所述第一阈值, 判断所述第一小区的 频率优先级与所述第二小区的频率优先级的关系, 以便于终端设备 选择相应的重选小区的方式来选择适合终端设备驻留的小区。
需要说明的是, 通信参数还可以是接收信号质量, 终端设备还 可以测量第一小区的接收信号质量值, 并从广播消息中获取接收信 号质量的第一最小阈值和接收信号质量的第一最小阈值的偏移量, 还可以从广播消息中获取接收信号质量的第二最小阈值或接收信号 质量的第二最小阈值的偏移量, 判断测量到的第一小区的接收信号 质量值是否大于接收信号质量的第一最小阈值与接收信号质量的第 一最小阈值的偏移量之和, 或, 判断测量到的第一小区的接收信号 质量值是否大于或等于接收信号质量的第二最小阈值与接收信号质 量的第一最小阈值的偏移量之和, 或, 判断测量到的第一小区的接 收信号质量值是否大于或等于接收信号质量的第一最小阈值与接收 信号质量的第二最小阈值的偏移量之和。 以便于终端设备选择可用 的服务小区, 为终端设备提供通信服务。
特别的, 终端设备还可以既测量接收信号强度值又测量接收信 号质量值, 当测量到的接收信号强度值大于从广播消息中获取到的 接收信号强度的最小阈值、 接收信号强度的最小阈值的偏移量和补 偿量之和, 且同时测量到的接收信号质量值大于从广播消息中获取 到的接收信号质量的最小阈值与接收信号质量的最小阈值的偏移量 之和, 使得将第一小区设置为终端设备的服务小区, 为终端设备提 供通信服务。
这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区, 使得终端设备在空闲态时, 测量到的接收信号的通信参 数值满足小区选择的要求, 从而能够使终端设备进行正常通信。
本发明实施例提供的选择小区的方法, 终端设备在初次选择小 区时, 还可以直接从广播消息中获取第一小区的接收信号强度的第 二最小阈值或接收信号强度的第二最小阈值的偏移量, 得到第二阈 值, 判断测量到的接收信号强度值是否大于第二阈值, 若测量到的 接收信号强度值大于第二阈值, 将所述第一小区设置为该终端设备 的服务小区。 这样一来, 终端设备可以快速地选择到适合终端设备 驻留的小区, 使终端设备进行正常通信。
示例的, 假设通信参数为接收信号强度, 通常情况下, 测量到 第一小区的接收信号强度值可以用 表示, 第一小区的接收信 号强度的第一最小阈值可以用 m表示, 第一小区的接收信号强 可以用 ^示 ,
Figure imgf000065_0001
则当测量到的第一小区的接收信号强度值小于或等于第一阈值, 即 Qrxlevmeas < ( ^r /e min Qrxlev m offset ) ^compensation日于 小区 一 闹 值。
所述第一小区的接收信号强度的第二最小阈值可以用 ^^vmn_ce
Figure imgf000066_0001
或 〉 ( wn_ee + wn , ) + compensation时, 将所述第一小区设置 为所述终端设备的服务小区。
其中 , ~MaX ( PEMax ~ P , 所述 为第 ■小区允许终端 设备的最大上行发射功率, 从广播消息中获取 PEM , 所述 ? 为由 终 端 设 备 能 力 决 定 的 最 大 上 行 发 射 功 率 , 所 述 , 示第一小区允许终端设备的最大上行发射 功率与由终端设备能力决定的最大上行发射功率之差和 0 之间取一 个最大值, 贝1 J所述 Ρ,α"为一个大于等于 0的值。 当 PEMax大于 ΡυΜαχ , 大于 0 时, 则缩小终端设备在小区边缘的接入范围, 避免由 于终端设备发射功率不足导致掉话和接入失败等问题, 而当 、 于 Ρυ , Pcompensation等于 () 时, 则终端设备可以按照最大上行发射功率 进行小区驻留, 接入网络。 所述 Qr ^皿 offset仅在终端设备周期性搜索 高优先级 PLMN ( Public Land Mobile Network , 公共陆地移动网络 ) 的情况下, 作为 dfevmin的一个补偿值使用。 所述 Qrd―为终端设备 测量到的第一小区的 RSRP ( Reference Signal Receiving Power , 参 考信号接收功率) 实际值。 实际应用中, ^rxfev匪为 整数型, 可以是
-70至 -22任意一个负整数 , 0 匪。 也为整数型 , 可以是 1至 8任意 一个整数。
假设当测量到的第一小区的接收信号强度值 为 -45 , 第一 小区的接收信号强度的第一最小阈值 ^^^匪为 -50 , 第一小区的接收 信号强度的第一最小阈值的偏移量 为 , , 卜偿量 为
0, 则第一阈值为 -50+7+0, 判断测量到的第一小区的接收信号强度 值是否大于第一小区的第一阈值, 即测量到的接收信号强度值小于 第一阈值 -45<-50+7+0, 则终端设备再从广播消息中获取第一小区 的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第 一小区的第二阈值。
假设当该广播消息包括所述第一小区的接收信号强度的第二最 小阈值 β·^^11- 为 -55 , 测量到的第一小区的接收信号强度值 为—45 , 第一小区的接收信号强度的第一最小阈值的偏移量
为 7 , 补偿量 为 0 , 则第二阈值为 - 55 +7+0 , 判断测量到的第 一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到 的 第 一 小 区 的接收信号 强 度值 大于 第 一 小 区 的 第 二 阈 值 -45>-55+7+0, 则将所述第一小 区设置为所述终端设备的服务小 区。
或者, 假设当该广播消息包括第一小区的接收信号强度的第二 最小阈值的偏移量 β 匪。 为 2 时, 测量到的第一小区的接收信号 强度值 为—45 , 第一小 区的接收信号强度的第一最小阈值
Qrxlevv^n为 50 , 补偿量 为 0 , 则第二阈值为 - 50 + 2 + 0 , 判断测量 到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即 测量到的第一小 区的接收信号强度值大于第一小区的第二阈值
-45>-50+2+0 则将所述第一小 区设置为所述终端设备的服务小 区。
特别的, 终端设备还可以从广播消息中获取公共偏移量, 所述 公共偏移量可以用 Q 表示 , 该公共偏移量 为枚举型, 可以取
-24, -22, -20, -18, -16, -14, -12, -10, -8, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 中任意一个。 当测量到的第 一小区的接收信号强度值小于或等于第一小区的第一阈值时, 利用 公共偏移量来减小第一小区的第一阈值, 以便于获得第一小区的第 二阈值, 使测量到的第一小区的接收信号强度值大于第一小区的第 二阈值, 将所述第一小区设置为该终端设备的服务小区。
示例的, 假设测量到的第一小区的接收信号强度值 Q"i—为
-45 , 第一小区的接收信号强度的第一最小阈值 dfevmm为 -50 , 第一 小区的接收信号强度的第一最小阈值的偏移量0 为 7 , 补偿量 为 (), 公共偏移量 。 为 3 , 则第一阈值为 - 50■ 3 + 7 + 0 , 判断测 量到的第一小区的接收信号强度值是否大于第一小区的第二阈值, 即测量到的接收信号强度值大于第二阈值 -45>-50-3+7+0, 则将所 述第一小区设置为所述终端设备的服务小区。
需要说明的是, 终端设备在初次选择小区时, 还可以直接从本 地或广播消息中获取第一小区的接收信号强度的第二最小阈值或接 收信号强度的第二最小阈值的偏移量, 得到第一小区的第二阈值, 判断测量到的第一小区的接收信号强度值是否大于第一小区的第二 阈值, 若测量到的第一小区的接收信号强度值大于第一小区的第二 阈值, 将所述第一小区设置为该终端设备的服务小区。 这样一来, 终端设备可以快速地选择到适合终端设备驻留的小区, 缩短了终端 设备选择小区的时间, 使终端设备进行正常通信。 实施例十二
本发明实施例一种选择小区的方法, 如图 10 所示, 应用于终 端设备, 假设终端设备以覆盖增强的方式选择第一小区为服务小 区, 以非覆盖增强的方式重选第二小区, 包括:
步骤 801、 接收第一小区所属基站发送的广播消息。
所述广播消息包括第二小区的通信参数的第一最小阈值、 所述 第二小区的通信参数的第一最小阈值的偏移量、 第二小区的第一门 限值和选择小区等级参数中至少一个。 终端设备可以从广播消息获取所述第二小区的第一门限值, 第 二小区的接收信号的通信参数的第一最小阈值、 第二小区的接收信 号的通信参数的第一最小阈值的偏移量和第二小区允许终端设备的 最大上行发射功率。 通常情况下, 所述第二小区的第一门限值可以 用 Thresh g , 表示。
所述选择小区等级参数用于终端设备以覆盖增强方式成功驻留 到第一小区后, 终端设备与基站进行消息交换所使用的选择小区等 级参数, 且终端设备首先以选择小区等级参数的低级进行终端设备 与基站进行消息交换, 即终端设备与基站之间可以重复发送终端设 备与基站进行交互所述发送的消息。 若在终端设备以选择小区等级 参数的低级时, 还是不能满足终端设备与基站之间的信息交互, 可 以以选择小区等级参数的中级或高级, 进行终端设备与基站之间重 复发送终端设备与基站进行交互所述发送的消息, 以实现终端设备 与基站进行的信息交互。
步骤 802、 测量第二小区的接收信号的通信参数值, 所述第二 小区为所述第一小区的任意一个邻小区。
从所述广播消息中获取所述第二小区的第一阈值或所述第二小 区的第一门限值, 所述第一阈值至少包括所述第二小区的接收信号 的通信参数的第一最小阈值与所述第二小区的接收信号的通信参数 的第一最小阈值的偏移量之和。
步骤 803、 判断所述通信参数值是否大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一门限值。
若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与 所述第一阈值之差大于所述第一门限值, 执行步骤 804。
若所述通信参数值小于或等于所述第一阈值, 或, 所述通信参 数值与所述第一阈值之差小于或等于所述第一门限值, 执行步骤 806。 本发明实施例假设所述通信参数值大于所述第一阈值, 或, 所 述通信参数值与所述第一阈值之差大于所述第一门限值, 执行步骤
804。
步骤 804、 将所述第二小区设置为所述终端设备的服务小区。 步骤 805、 向基站发送更新消息。
向基站发送更新消息后, 以便于所述基站将所述更新消息透传 至移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所 述终端设备, 所述更新消息包括所述第二小区的标识和第二小区的 接收信号的通信参数的第一阈值或第二小区的第一门限值。
步骤 806、 根据所述第一小区的频率优先级与所述第二小区的 频率优先级的高低关系, 从所述广播消息中获取选择到所述第二小 区的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区。
所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。 执行步骤 805。
向基站发送更新消息后, 以便于所述基站将所述更新消息透传 至移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所 述终端设备, 所述更新消息包括所述第二小区的标识和根据第二小 区频率优先级获取的所述第二小区的相应参数。
所述相应参数包括所述第一小区的接收信号的通信参数的迟滞 量、 所述第二小区的接收信号的通信参数的偏移量, 第一小区的第 二门限值, 和第二小区的第二门限值中至少一种。
这样一来, 当测量到的第一小区的接收信号的通信参数值小于 或等于该第一小区的第一阈值时, 通过获取第二阈值, 判断该通信 参数值大于所述第二阈值, 将所述第一小区设置为所述终端设备的 服务小区后, 存在第二小区的通信参数值大于所述第二小区的第一 阈值, 或, 所述第二小区的通信参数值与所述第一阈值之差大于所 述第一门限值, 使得终端设备可以重选到第二小区, 在终端设备进 行正常通信的情况下, 提高了终端设备的通信质量。 实施例十三
本发明实施例一种选择小区的方法, 如图 1 1 所示, 应用于终 端设备, 假设终端设备测量到第一小区的接收信号的通信参数值, 并获取到第一小区的第一阈值, 判断第一小区的接收信号的通信参 数值大于第一小区的第一阈值, 即以非覆盖增强的方式选择第一小 区为服务小区, 以覆盖增强的方式重选第二小区, 包括:
步骤 901、 接收第一小区所属基站发送的广播消息。
所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟 滞量、 所述第二小区的接收信号的通信参数的偏移量、 所述第二小 区的第二门限值、 所述第一小区的频率优先级参数、 所述第二小区 的频率优先级参数和选择小区等级参数中至少一个。
需要说明的是, 终端设备还可以重复进行广播消息的检测, 直 到检测到所述广播消息, 接收所述广播消息。
步骤 902、 若所述第一小区的接收信号的通信参数值大于所述 第一小区的第一阈值, 将所述第一小区设置为所述终端设备的服务 小区。
步骤 903、 测量第二小区的接收信号的通信参数值。
所述第二小区为所述第一小区的任意一个邻小区。
步骤 904、 获取第二小区的第二门限值。
当所述第一小区的接收信号的通信参数值小于或等于所述第一 小区的第一阈值, 从所述广播消息中获取第二小区的第二阈值, 或, 当所述第一小区的接收信号的通信参数值与所述第一小区的第 一阈值之差小于或等于第一门限值。
所述第二阈值至少包括所述第二小区的接收信号的通信参数的 第二最小阈值与所述第二小区的接收信号的通信参数的第一最小阈 值的偏移量之和。
步骤 905、 判断所述第二小区的接收信号的通信参数值是否大 于所述第二小区的第二阈值, 或, 所述第二小区的接收信号的通信 参数值与所述第二阈值之差是否大于所述第二门限值。
若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与 所述第二阈值之差大于所述第二门限值, 执行步骤 906。
若所述第二小区的通信参数值小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于所述第二门限值, 执行步骤 907。
步骤 906、 将所述第二小区设置为所述终端设备的服务小区。 步骤 907、 向基站发送更新消息。
以便于所述基站将所述更新消息透传至移动管理实体, 使得所 述移动管理实体根据所述更新消息寻呼所述终端设备, 所述更新消 息包括所述第二小区的标识和第二小区的接收信号的通信参数的第 二阈值或第二小区的第二门限值。
步骤 908、 根据所述第一小区的频率优先级与所述第二小区的 频率优先级的高低关系, 从所述广播消息中获取选择到所述第二小 区的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区。
所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。 执行步骤 907。
以便于所述基站将所述更新消息透传至移动管理实体, 使得所 述移动管理实体根据所述更新消息寻呼所述终端设备, 所述更新消 息包括所述第二小区的标识和根据第二小区频率优先级获取的所述 第二小区的相应参数。
这样一来, 当测量到的第一小区的接收信号的通信参数值大于 该第一小区的第一阈值时, 将所述第一小区设置为所述终端设备的 服务小区之后, 若所述第一小区的接收信号的通信参数值小于或等 于所述第一小区的第一阈值, 则从所述广播消息中获取第二小区的 第二阈值, 判断第二小区的通信参数值大于所述第二小区的第二阈 值, 或, 所述第二小区的通信参数值与所述第二阈值之差大于所述 第二门限值, 使得终端设备可以重选到第二小区, 在终端设备进行 正常通信的情况下, 提高了终端设备的通信质量。 实施例十四
本发明实施例一种选择小区的方法, 如图 12所示, 包括: 步骤 1001、 获取广播消息。
所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞 量、 第二小区的接收信号的通信参数的偏移量和所述第二小区的第 二门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率 优先级参数和选择小区等级参数中至少一个, 所述第二小区为所述 第一小区的邻小区。
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
步骤 1002、 向终端设备发送广播消息。
以便于所述终端设备根据所述广播消息选择小区。
步骤 1003、 接收所述终端设备发送的更新消息。 所述更新消息包括所述第二小区的标识、 所述第一小区的接收 信号的通信参数的迟滞量、 所述第二小区的接收信号的通信参数的 偏移量和第二门限值中至少一个, 以便于将所述更新消息透传至移 动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述终 端设备。
这样一来, 基站通过获取广播消息, 向终端设备发送该广播消 息, 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的 第二最小阈值的偏移量、 第一小区的接收信号的通信参数的迟滞 量、 第二小区的接收信号的通信参数的偏移量和所述第二小区的第 二门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率 优先级参数和选择小区等级参数中至少一个, 所述第二小区为所述 第一小区的邻小区, 以便于所述终端设备根据所述广播消息选择小 区, 使得所述终端设备能够进行正常通信, 并接收所述终端设备发 送的更新消息, 以便于将所述更新消息透传至移动管理实体, 使得 所述移动管理实体根据所述更新消息寻呼所述终端设备。 实施例十五
本发明实施例提供一种终端设备, 在终端设备重选到第一小区 的邻小区, 即能够为该终端设备提供通信服务的第二小区时, 若第 二小区的通信参数值小于或等于所述第二小区的第一阈值, 终端设 备需要根据第二小区的载频优先级与第一小区的载频优先级的高低 关系, 从所述广播消息中获取选择到所述第二小区的相应参数, 选 择不同的测量启动规则, 来确定将所述第二小区设置为所述终端设 备的服务小区, 以便于使终端设备进行正常通信。
通常情况下, 小区的载频优先级在基站中配置, 通过基站向终 端设备发送广播消息的方式告知终端设备小区的载频优先级, 所述 广播消息中携带有小区的载频优先级。 终端设备重选小区时可以用 cellReselectionPriority 表示小区的载频优先级, 所述小区的载频优 先级取值范围为 0 到 7 , 该小区的载频优先级的值越大, 表示对应 载频上所有小区的重选优先级越高。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 R«i 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 β 表示, 则
Rs = QmeaS,S + Qtfyst和 Rn = QmeaS,n _ Qoffiet , 即 ^ > 为 R 准贝 'J , 所述 和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
同理, 在终端设备重选到第一小区的邻小区, 即能够为该终端 设备提供通信服务的第二小区时, 当第一小区的通信参数值小于或 等于所述第二小区的第一阈值, 第二小区的通信参数值小于或等于 所述第二小区的第二阈值, 终端设备需要根据第二小区的载频优先 级与第一小区的载频优先级的高低关系, 从所述广播消息中获取选 择到所述第二小区的相应参数, 选择不同的测量启动规则, 来确定 将所述第二小区设置为所述终端设备的服务小区, 以便于使终端设 备进行正常通信。
当终端设备进行小区重选时, 若第一小区的频率优先级等于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区, 获 取 值或 值 , 所述 值为第一小区的接收信号强度值与接收信号 强度的第二迟滞量之和, 所述 值为第二小区的接收信号强度值与 接收信号强度的第二偏移量之差。 判断所述 值是否小于所述 值, 若所述 值小于所述 1值, 将所述第二小区设置为所述终端设 备的服务小区。
通常情况下, 第一小区的通信参数的第一迟滞量可以用 表 示, 所述第二小区的通信参数的第一偏移量可以用 β 表示, 则
Rs = Qmeas,S + Qnyst和 Rn = QmeaS,n _ Qoffiet , 即 ?„ > 为 R 准贝 |J , 所述 Qnyst和 Qoffiet用 于小区重选时防止产生乒乓效应。
第一小区的接收信号强度的第二迟滞量可以用 β 表示, 第 二小 区 的接收信号强度的第二偏移量可以用 Q 表示 , 则
= QmeaS,S + Quyst _ce和 ^«1 = QmeaS,n _ Qoffiet _ce , l > 为 R准贝 'J。 其中 , 所述通 信参数的第二迟滞量小于所述通信参数的第一迟滞量, 所述通信参 数的第二偏移量小于所述通信参数的第一偏移量。
当终端设备进行小区重选时, 若第一小区的频率优先级高于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第一小区的通信参数值与所述第一小区的第二阈值之差是否 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差是否大于所述第二小区的第二门限值。
若所述第一小区的通信参数值与所述第一小区的第二阈值之差 小于该第一小区的第二门限值, 第二小区的通信参数值与所述第二 小区的第二阈值之差大于所述第二小区的第二门限值, 将所述第二 小区设置为所述终端设备的服务小区。
当终端设备进行小区重选时, 若第一小区的频率优先级低于第 二小区的频率优先级, 所述第二小区为所述第一小区的邻小区。 判 断所述第二小区的通信参数值与该第二小区的第二阈值之差是否大 于该第二小区的第二门限值, 若所述第二小区的通信参数值与该第 二小区的第二阈值之差是否大于该第二小区的第二门限值, 将所述 第二小区设置为该终端设备的服务小区。
示例的, 当终端设备以覆盖增强的方式选择到第一小区, 将第 一小区设置为该终端设备的服务小区后, 若终端设备从接收信号较 弱的地方移动到接收信号较强的地方, 存在第二小区的接收信号较 强, 终端设备以非覆盖增强的方式重选到第二小区, 但是要当端设 备从接收信号较强的地方又移动到接收信号较弱的地方时, 此时所 述第二小区的接收信号也较弱, 则终端设备测量到的接收信号的通 信参数值无法满足 S 准则, 则终端设备通过判断第一小区的频率优 先级与第二小区的频率优先级的方式进行小区重选。 当终端设备以非覆盖增强的方式选择到第一小区, 将第一小区 设置为该终端设备的服务小区后, 若终端设备从接收信号较强的地 方移动到接收信号较弱的地方, 存在第二小区的接收信号较弱, 终 端设备以覆盖增强的方式重选到第二小区, 此时, 终端设备的优先 级可以是第一小区的频率优先级低于第二小区的频率优先级。 且终 端设备还可以通过判断第一小区的频率优先级与第二小区的频率优 先级的方式进行小区重选。
这样一来, 当终端设备以非覆盖增强方式选择到第二小区, 将 第二小区设置为该终端设备的服务小区后, 当第二小区的通信参数 值小于或等于所述第二小区的第一阈值时, 或当终端设备以覆盖增 强方式选择到第二小区, 将第二小区设置为该终端设备的服务小区 后, 当第一小区的通信参数值小于或等于所述第二小区的第一阈 值, 或第二小区的通信参数值小于或等于所述第二小区的第二阈值 时, 终端设备可以根据第二小区的载频优先级与第一小区的载频优 先级的高低关系, 从所述广播消息中获取选择到所述第二小区的相 应参数, 选择不同的测量启动规则, 来确定将所述第二小区设置为 所述终端设备的服务小区, 以便于使终端设备进行正常通信。 在本发明所述的相关实施例中, 在终端设备选择适合该终端设 备进行驻留的小区之前, 需要先从所述测量的小区所属的基站获取 广播消息, 所述广播消息可以为第一系统信息块。 当前, 第一系统 信息块是每个偶数帧的第 5 个子帧发送, 但在覆盖增强模式下, 终 端无法按照现有方式获取第一信息块。
实施例十六
假设基站先重复发送广播消息, 然后, 该终端设备可以从本地 预设的配置信息中获取第一时间段, 基于所述假设, 终端在所述第 一时间段内, 重复接收基站发送的广播消息, 并且合并解析所述重 复接收到的该广播消息, 以获取所述广播消息的内容。
实施例十七
假设基站先重复发送广播消息, 然后, 该终端设备可以从本地 预设的配置信息中获取第一时间段, 基于所述假设, 所述终端设备 从系统帧号对所述第一时间段取模, 当该第一时间段取模后为 0 的 帧开始, 以所述第一时间段作为接收窗, 在所述接收窗内重复接收 所述广播消息, 并且合并解析重复接收到的该广播消息, 以获取所 述广播消息的内容。 示例的, 假设第一时间段为 N , 所述终端设备 从系统帧号对 N取模后为 0的系统帧开始至从系统帧号对 N取模为 N- 1 的帧结束为值, 即连续的 N个帧作为接收窗。
实施例十八
假设基站先重复发送广播消息, 然后, 该终端设备可以从本地 预设的配置信息中获取第一时间段, 基于所述假设, 所述终端设备 从所述接收窗的起始时刻获取广播消息的时间点开始, 以所述第一 时间段作为接收窗, 持续滑动所述接收窗, 并在所述接收窗内重复 接收所述广播消息, 并且合并解析重复接收到的该广播消息, 直到 解析出所述广播消息。 所述接收窗的起始时刻可以为系统帧中的任 意一个帧的起始时刻, 连续 N个帧作为接收窗。
实施例十九
在实施例十六至实施例十八的基础上, 所述第一时间段为基站 支持的最大覆盖增强等级对应的广播消息合并次数或所述第一时间 段为系统信息修改周期。
实施例二十
在实施例十六至实施例十九的基础上, 所述第一时间段为 64 帧的整数倍。
实施例二十一
在实施例十六至实施例二十的基础上, 所述获取第一时间段, 为从终端设备预设的配置信息中获取所述广播消 , ¾。
实施例二十二
终端设备可以从第一系统信息块的内容中获取以覆盖增强方式 接收的至少一个第二系统信息块, 每个所述第二系统信息与所述第 一系统信息块不同。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简 洁, 上述描述的系统, 装置和单元的具体工作过程, 可以参考前述 方法实施例中的对应过程, 在此不再贅述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系 统, 装置和方法, 可以通过其它的方式实现。 例如, 以上所描述的 装置实施例仅仅是示意性的, 例如, 所述单元的划分, 仅仅为一种 逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单元 或组件可以结合或者可以集成到另一个系统, 或一些特征可以忽 略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直接耦 合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信 连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分 开的, 作为单元显示的部件可以是或者也可以不是物理单元, 即可 以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据实 际的需要选择其中的部分或者全部单元来实现本实施例方案的 目 的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处 理单元中, 也可以是各个单元单独物理包括, 也可以两个或两个以 上单元集成在一个单元中。 上述集成的单元既可以采用硬件的形式 实现, 也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或 部分步骤可以通过程序指令相关的硬件来完成, 前述的程序可以存 储于一计算机可读取存储介质中, 该程序在执行时, 执行包括上述 方法实施例的步骤; 而前述的存储介质包括: ROM、 RAM , 磁碟 或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围 并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技 术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应所述以权利要求的保护范围为

Claims

权 利 要 求 书
1、 一种终端设备, 其特征在于, 包括:
第一测量单元, 用于测量第一小区的接收信号的通信参数值, 所述第一小区是能够为所述终端设备提供通信服务的小区;
第一判断单元, 用于判断所述通信参数值是否大于所述第一小 区的第一阈值, 所述第一阈值至少包括所述第一小区的接收信号的 通信参数的第一最小阈值与所述第一小区的接收信号的通信参数的 第一最小阈值的偏移量之和;
第一获取单元, 用于若所述通信参数值小于或等于所述第一阈 值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述第一 小区的接收信号的通信参数的第一最小阈值与所述第一小区的接收 信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第二最小阈值与所 述第一小区的接收信号的通信参数的第一最小阈值的偏移量之和; 第二判断单元, 用于判断所述通信参数值是否大于所述第二阈 值;
第一设置单元, 用于若所述通信参数值大于所述第二阈值, 将 所述第一小区设置为所述终端设备的服务小区。
2、 根据权利要求 1 所述的终端设备, 其特征在于, 所述终端设 备还包括:
第二测量单元, 用于测量第二小区的接收信号的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区;
第二获取单元, 用于从所述广播消息中获取所述第二小区的第 一阈值或所述第二小区的第一门限值, 所述第一阈值至少包括所述 第二小区的接收信号的通信参数的第一最小阈值与所述第二小区的 接收信号的通信参数的第一最小阈值的偏移量之和;
第三判断单元, 用于判断所述通信参数值是否大于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一门 限值; 第二设置单元, 用于若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限值, 将 所述第二小区设置为所述终端设备的服务小区;
所述第二设置单元还用于若所述通信参数值小于或等于所述第 一阈值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述 第一门限值, 根据所述第一小区的频率优先级与所述第二小区的频 率优先级的高低关系, 从所述广播消息中获取选择到所述第二小区 的相应参数来确定将所述第二小区设置为所述终端设备的服务小 区, 所述相应参数至少包括所述第一小区的接收信号的通信参数的 迟滞量和所述第二小区的接收信号的通信参数的偏移量。
3、 根据权利要求 1所述的终端设备, 其特征在于,
所述第一设置单元还用于若所述第一小区的接收信号的通信参 数值大于所述第一小区的第一阈值, 将所述第一小区设置为所述终 端设备的服务小区;
所述终端设备还包括:
第三测量单元, 用于测量第二小区的接收信号的通信参数值, 所述第二小区为所述第一小区的任意一个邻小区;
第三获取单元, 用于当所述第一小区的接收信号的通信参数值 小于或等于所述第一小区的第一阈值, 从所述广播消息中获取第二 小区的第二阈值, 所述第二阈值至少包括所述第二小区的接收信号 的通信参数的第二最小阈值与所述第二小区的接收信号的通信参数 的第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信号的 通信参数值与所述第一小区的第一阈值之差小于或等于第一门限 值, 获取第二小区的第二门限值;
第四判断单元, 用于判断所述第二小区的接收信号的通信参数 值是否大于所述第二小区的第二阈值, 或, 所述第二小区的接收信 号的通信参数值与所述第二阈值之差是否大于所述第二门限值; 第三设置单元, 用于若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限值, 将 所述第二小区设置为所述终端设备的服务小区;
所述第三设置单元还用于若所述第二小区的通信参数值小于或 等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于 或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第 二小区的频率优先级的高低关系, 从所述广播消息中获取选择到所 述第二小区的相应参数来确定将所述第二小区设置为所述终端设备 的服务小区, 所述相应参数至少包括所述第一小区的接收信号的通 信参数的迟滞量和所述第二小区的接收信号的通信参数的偏移量。
4、 根据权利要求 1 至 3任意一项权利要求所述的终端设备, 其 特征在于, 所述终端设备还包括:
接收单元, 用于接收第一小区所属基站发送的广播消息, 所述 广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小 阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所 述第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二 门限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优 先级参数和选择小区等级参数中至少一个。
5、 根据权利要求 4所述的终端设备, 其特征在于, 所述接收单 元还用于:
重复进行所述广播消息的检测, 直到检测到所述广播消息, 接 收所述广播消息。
6、 根据权利要求 2至 3任意一项权利要求所述的终端设备, 其 特征在于, 所述终端设备还包括:
发送单元, 用于向基站发送更新消息, 以便于所述基站将所述 更新消息透传至移动管理实体, 使得所述移动管理实体根据所述更 新消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标 识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量 和第二门限值中至少一个。
7、 根据权利要求 1 至 6任意一项权利要求所述的终端设备, 其 特征在于, 所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A1 为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所 述 B为接收信号质量值的最小阈值, 所述 B 1为接收信号质量值的最 小阈值的偏移量。
8、 一种基站, 其特征在于, 包括:
获取单元, 用于获取广播消息, 所述广播消息包括通信参数的 第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区 的接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参数 的偏移量和所述第二小区的第二门限值、 所述第一小区的频率优先 级参数、 所述第二小区的频率优先级参数和选择小区等级参数中至 少一个, 所述第二小区为所述第一小区的邻小区;
发送单元, 用于向终端设备发送广播消息, 以便于所述终端设 备根据所述广播消息选择小区。
9、 根据权利要求 8所述的基站, 其特征在于, 所述获取单元具 体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
10、 根据权利要求 9 所述的基站, 其特征在于, 所述发送单元 还用于:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
11、 根据权利要求 8 所述的基站, 其特征在于, 所述基站还包 括:
接收单元, 用于接收所述终端设备发送的更新消息, 所述更新 消息包括所述第二小区的标识、 所述第一小区的接收信号的通信参 数的迟滞量、 所述第二小区的接收信号的通信参数的偏移量和第二 门限值中至少一个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述终端设备。
12、 一种通信系统, 其特征在于, 包括:
权利要求 1至 7任意一项权利要求所述的终端设备和权利要求 8 至 1 1任意一项权利要求所述的基站中至少一个。
13、 一种终端设备, 其特征在于, 包括:
处理器, 用于测量第一小区的接收信号的通信参数值, 所述第 一小区是能够为所述终端设备提供通信服务的小区;
所述处理器还用于判断所述通信参数值是否大于所述第一小区 的第一阈值, 所述第一阈值至少包括所述第一小区的接收信号的通 信参数的第一最小阈值与所述第一小区的接收信号的通信参数的第 一最小阈值的偏移量之和;
所述处理器还用于若所述通信参数值小于或等于所述第一阈 值, 从广播消息中获取第二阈值, 所述第二阈值至少包括所述第一 小区的接收信号的通信参数的第一最小阈值与所述第一小区的接收 信号的通信参数的第二最小阈值的偏移量之和, 或, 所述第二阈值 至少包括所述第一小区的接收信号的通信参数的第二最小阈值与所 述第一小区的接收信号的通信参数的第一最小阈值的偏移量之和; 所述处理器还用于判断所述通信参数值是否大于所述第二阈 值;
所述处理器还用于若所述通信参数值大于所述第二阈值, 将所 述第一小区设置为所述终端设备的服务小区。
14、 根据权利要求 13所述的终端设备, 其特征在于,
所述处理器还用于测量第二小区的接收信号的通信参数值, 所 述第二小区为所述第一小区的任意一个邻小区;
所述处理器还用于从所述广播消息中获取所述第二小区的第一 阈值或所述第二小区的第一门限值, 所述第一阈值至少包括所述第 二小区的接收信号的通信参数的第一最小阈值与所述第二小区的接 收信号的通信参数的第一最小阈值的偏移量之和; 所述处理器还用于判断所述通信参数值是否大于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差是否大于所述第一门 限值;
所述处理器还用于若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与所述第一阈值之差大于所述第一门限值, 将所述 第二小区设置为所述终端设备的服务小区;
所述处理器还用于若所述通信参数值小于或等于所述第一阈 值, 或, 所述通信参数值与所述第一阈值之差小于或等于所述第一 门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优 先级的高低关系, 从所述广播消息中获取选择到所述第二小区的相 应参数来确定将所述第二小区设置为所述终端设备的服务小区, 所 述相应参数至少包括所述第一小区的接收信号的通信参数的迟滞量 和所述第二小区的接收信号的通信参数的偏移量。
15、 根据权利要求 13所述的终端设备, 其特征在于,
所述处理器还用于若所述第一小区的接收信号的通信参数值大 于所述第一小区的第一阈值, 将所述第一小区设置为所述终端设备 的服务小区;
所述处理器还用于测量第二小区的接收信号的通信参数值, 所 述第二小区为所述第一小区的任意一个邻小区;
所述处理器还用于当所述第一小区的接收信号的通信参数值小 于或等于所述第一小区的第一阈值, 从所述广播消息中获取第二小 区的第二阈值, 所述第二阈值至少包括所述第二小区的接收信号的 通信参数的第二最小阈值与所述第二小区的接收信号的通信参数的 第一最小阈值的偏移量之和, 或, 当所述第一小区的接收信号的通 信参数值与所述第一小区的第一阈值之差小于或等于第一门限值, 获取第二小区的第二门限值;
所述处理器还用于判断所述第二小区的接收信号的通信参数值 是否大于所述第二小区的第二阈值, 或, 所述第二小区的接收信号 的通信参数值与所述第二阈值之差是否大于所述第二门限值; 所述处理器还用于若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差大于所述第二门限值, 将所述 第二小区设置为所述终端设备的服务小区;
所述处理器还用于若所述第二小区的通信参数值小于或等于所 述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于 所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区 的频率优先级的高低关系, 从所述广播消息中获取选择到所述第二 小区的相应参数来确定将所述第二小区设置为所述终端设备的服务 小区, 所述相应参数至少包括所述第一小区的接收信号的通信参数 的迟滞量和所述第二小区的接收信号的通信参数的偏移量。
16、 根据权利要求 13至 15任意一项权利要求所述的终端设备, 其特征在于, 所述终端设备还包括:
接收机, 用于接收第一小区所属基站发送的广播消息, 所述广 播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小阈 值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所述 第二小区的接收信号的通信参数的偏移量、 所述第二小区的第二门 限值、 所述第一小区的频率优先级参数、 所述第二小区的频率优先 级参数和选择小区等级参数中至少一个。
17、 根据权利要求 16所述的终端设备, 其特征在于, 所述接收 机还用于:
重复进行所述第二广播消息的检测, 直到检测到所述第二广播 消息, 接收所述第二广播消息。
18、 根据权利要求 14至 15任意一项权利要求所述的终端设备, 其特征在于, 所述终端设备还包括:
发射机, 用于向基站发送更新消息, 以便于所述基站将所述更 新消息透传至移动管理实体, 使得所述移动管理实体根据所述更新 消息寻呼所述终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通信参数的迟滞量、 接收信号的通信参数的偏移量和第 二门限值中至少一个。
19、 根据权利要求 13至 18任意一项权利要求所述的终端设备, 其特征在于,
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A1 为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所 述 B为接收信号质量值的最小阈值, 所述 B 1为接收信号质量值的最 小阈值的偏移量。
20、 一种基站, 其特征在于, 包括:
处理器, 用于获取广播消息, 所述广播消息包括通信参数的第 二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区的 接收信号的通信参数的迟滞量、 第二小区的接收信号的通信参数的 偏移量和所述第二小区的第二门限值、 所述第一小区的频率优先级 参数、 所述第二小区的频率优先级参数和选择小区等级参数中至少 一个, 所述第二小区为所述第一小区的邻小区;
发射机, 用于向终端设备发送广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
21、 根据权利要求 20所述的基站, 其特征在于, 所述处理器具 体用于:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
22、 根据权利要求 21 所述的基站, 其特征在于, 所述处理器还 用于:
重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
23、 根据权利要求 20所述的基站, 其特征在于, 所述基站还包 括:
接收机, 用于接收所述终端设备发送的更新消息, 所述更新消 息包括所述第二小区的标识、 所述第一小区的接收信号的通信参数 的迟滞量、 所述第二小区的接收信号的通信参数的偏移量和第二门 限值中至少一个, 以便于将所述更新消息透传至移动管理实体, 使 得所述移动管理实体根据所述更新消息寻呼所述终端设备。
24、 一种通信系统, 其特征在于, 包括:
权利要求 13至 19任意一项权利要求所述的终端设备和权利要求 20至 23任意一项权利要求所述的基站中至少一个。
25、 一种选择小区的方法, 其特征在于, 应用于终端设备, 包 括:
测量第一小区的接收信号的通信参数值, 所述第一小区是能够 为所述终端设备提供通信服务的小区;
判断所述通信参数值是否大于所述第一小区的第一阈值, 所述 第一阈值至少包括所述第一小区的接收信号的通信参数的第一最小 阈值与所述第一小区的接收信号的通信参数的第一最小阈值的偏移 量之和;
若所述通信参数值小于或等于所述第一阈值, 从广播消息中获 取第二阈值, 所述第二阈值至少包括所述第一小区的接收信号的通 信参数的第一最小阈值与所述第一小区的接收信号的通信参数的第 二最小阈值的偏移量之和, 或, 所述第二阈值至少包括所述第一小 区的接收信号的通信参数的第二最小阈值与所述第一小区的接收信 号的通信参数的第一最小阈值的偏移量之和;
判断所述通信参数值是否大于所述第二阈值;
若所述通信参数值大于所述第二阈值, 将所述第一小区设置为 所述终端设备的服务小区。
26、 根据权利要求 25所述的方法, 其特征在于, 在所述将所述 第一小区设置为所述终端设备的服务小区之后, 所述方法还包括: 测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区;
从所述广播消息中获取所述第二小区的第一阈值或所述第二小 区的第一门限值, 所述第一阈值至少包括所述第二小区的接收信号 的通信参数的第一最小阈值与所述第二小区的接收信号的通信参数 的第一最小阈值的偏移量之和;
判断所述通信参数值是否大于所述第一阈值, 或, 所述通信参 数值与所述第一阈值之差是否大于所述第一门限值;
若所述通信参数值大于所述第一阈值, 或, 所述通信参数值与 所述第一阈值之差大于所述第一门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述通信参数值小于或等于所述第一阈值, 或, 所述通信参 数值与所述第一阈值之差小于或等于所述第一门限值, 根据所述第 一小区的频率优先级与所述第二小区的频率优先级的高低关系, 从 所述广播消息中获取选择到所述第二小区的相应参数来确定将所述 第二小区设置为所述终端设备的服务小区, 所述相应参数至少包括 所述第一小区的接收信号的通信参数的迟滞量和所述第二小区的接 收信号的通信参数的偏移量。
27、 根据权利要求 25所述的方法, 其特征在于, 在所述判断所 述通信参数值是否大于所述第一小区的第一阈值之后, 所述方法还 包括:
若所述第一小区的接收信号的通信参数值大于所述第一小区的 第一阈值, 将所述第一小区设置为所述终端设备的服务小区;
测量第二小区的接收信号的通信参数值, 所述第二小区为所述 第一小区的任意一个邻小区;
当所述第一小区的接收信号的通信参数值小于或等于所述第一 小区的第一阈值, 从所述广播消息中获取第二小区的第二阈值, 所 述第二阈值至少包括所述第二小区的接收信号的通信参数的第二最 小阈值与所述第二小区的接收信号的通信参数的第一最小阈值的偏 移量之和, 或, 当所述第一小区的接收信号的通信参数值与所述第 一小区的第一阈值之差小于或等于第一门限值, 获取第二小区的第 二门限值; 判断所述第二小区的接收信号的通信参数值是否大于所述第二 小区的第二阈值, 或, 所述第二小区的接收信号的通信参数值与所 述第二阈值之差是否大于所述第二门限值;
若所述通信参数值大于所述第二阈值, 或, 所述通信参数值与 所述第二阈值之差大于所述第二门限值, 将所述第二小区设置为所 述终端设备的服务小区;
若所述第二小区的通信参数值小于或等于所述第二阈值, 或, 所述通信参数值与所述第二阈值之差小于或等于所述第二门限值, 根据所述第一小区的频率优先级与所述第二小区的频率优先级的高 低关系, 从所述广播消息中获取选择到所述第二小区的相应参数来 确定将所述第二小区设置为所述终端设备的服务小区, 所述相应参 数至少包括所述第一小区的接收信号的通信参数的迟滞量和所述第 二小区的接收信号的通信参数的偏移量。
28、 根据权利要求 25至 27任意一项权利要求所述的方法, 其特 征在于, 在所述测量第一小区的接收信号的通信参数值或测量第二 小区的接收信号的通信参数值之前, 所述方法还包括:
接收第一小区所属基站发送的广播消息, 所述广播消息包括通 信参数的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 所述第一小区的接收信号的通信参数的迟滞量、 所述第二小区的接 收信号的通信参数的偏移量、 所述第二小区的第二门限值、 所述第 一小区的频率优先级参数、 所述第二小区的频率优先级参数和选择 小区等级参数中至少一个。
29、 根据权利要求 28所述的方法, 其特征在于, 所述接收第一 小区所属基站发送的广播消息包括:
重复进行所述广播消息的检测, 直到检测到所述广播消息, 接 收所述广播消息。
30、 根据权利要求 26至 27任意一项权利要求所述的方法, 其特 征在于, 在所述将所述第二小区设置为所述终端设备的服务小区之 后, 所述方法还包括: 向基站发送更新消息, 以便于所述基站将所述更新消息透传至 移动管理实体, 使得所述移动管理实体根据所述更新消息寻呼所述 终端设备, 所述更新消息包括所述第二小区的标识、 接收信号的通 信参数的迟滞量、 接收信号的通信参数的偏移量和第二门限值中至 少一个。
3 1、 根据权利要求 25至 30任意一项权利要求所述的方法, 其特 征在于,
所述通信参数为接收信号强度或接收信号质量;
当 所述通信参数为接收信号 强度时 , 所述第 一 阈值为
A+A 1 +C , 所述 A为接收信号强度值的最小阈值, 所述 A 1 为接收信 号强度值的最小阈值的偏移量, 所述 C为补偿量;
当所述通信参数为接收信号质量时, 所述第一阈值为 B+B 1 , 所 述 B为接收信号质量值的最小阈值, 所述 B 1为接收信号质量值的最 小阈值的偏移量。
32、 一种选择小区的方法, 其特征在于, 应用于基站, 包括: 获取广播消息, 所述广播消息包括通信参数的第二最小阈值、 所述通信参数的第二最小阈值的偏移量、 第一小区的接收信号的通 信参数的迟滞量、 第二小区的接收信号的通信参数的偏移量和所述 第二小区的第二门限值、 所述第一小区的频率优先级参数、 所述第 二小区的频率优先级参数和选择小区等级参数中至少一个, 所述第 二小区为所述第一小区的邻小区;
向终端设备发送广播消息, 以便于所述终端设备根据所述广播 消息选择小区。
33、 根据权利要求 32所述的方法, 其特征在于, 所述获取广播 消息包括:
从本地或从第二基站向所述第一基站发送的请求消息、 响应消 息或更新消息中获取所述广播消息。
34、 根据权利要求 33 所述的方法, 其特征在于, 所述向终端设 备发送广播消息包括: 重复向所述终端设备发送所述广播消息, 以便于所述终端设备 根据所述广播消息选择小区。
35、 根据权利要求 32所述的方法, 其特征在于, 在所述向终端 设备发送广播消息之后, 所述方法还包括:
接收所述终端设备发送的更新消息, 所迷更新消息包括所述第 二小区的标识、 所述第一小区的接收信号的通信参数的迟滞量、 所 迷第二小区的接收信号的通信参数的偏移量和第二门限值中至少一 个, 以便于将所述更新消息透传至移动管理实体, 使得所述移动管 理实体根据所述更新消息寻呼所述终端设备。
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