WO2014177037A1 - 一种小区重选的方法、系统和设备 - Google Patents

一种小区重选的方法、系统和设备 Download PDF

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Publication number
WO2014177037A1
WO2014177037A1 PCT/CN2014/076364 CN2014076364W WO2014177037A1 WO 2014177037 A1 WO2014177037 A1 WO 2014177037A1 CN 2014076364 W CN2014076364 W CN 2014076364W WO 2014177037 A1 WO2014177037 A1 WO 2014177037A1
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WIPO (PCT)
Prior art keywords
cell
frequency point
user equipment
signal measurement
backup frequency
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PCT/CN2014/076364
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English (en)
French (fr)
Inventor
白文岭
李媛媛
蒋成钢
杨宇
胡金玲
Original Assignee
电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2014177037A1 publication Critical patent/WO2014177037A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for cell reselection. Background technique
  • Radio communication frequency is a valuable natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the current situation of spectrum resources, relevant departments and agencies have monitored the wireless communication spectrum. Studies have found that certain frequency bands (such as TV bands) have not been used most of the time or have not been used in most areas, and some bands have experienced multi-system and multi-user simultaneous competition, namely spectrum resources. There is an imbalance in the use. The concept of Cognitive Radio (CR) is generated in this context. The basic idea is: Cognitive radio systems can monitor changes in the current wireless environment without causing interference to the authorization system. Dynamically opportunistic access to white space for communication.
  • CR Cognitive Radio
  • the premise is that the protection of the authorization system service is not harmful to the CR system, which requires:
  • the cognitive radio system accurately determines the ability to authorize the white space spectrum of the system band
  • the idle state user equipment needs to monitor the signal shield of the serving cell and/or the neighboring cell at any time, and select a cell with higher priority or better channel shield according to the signal shield. Residing, this process is a cell reselection.
  • the cell reselection process of the conventional wireless communication system mainly includes: the user equipment measures the signal shield of the serving cell, and jointly determines whether to measure the neighboring cell according to the priority parameter and the like, and maintains the weight according to the measured signal shield information of the neighboring cell.
  • Selecting a cell list the user equipment determines whether to trigger cell reselection according to the signal shield information of the serving cell and the neighboring cell, or the user equipment determines whether the cell is prohibited by the system information, and performs specific cell reselection according to the reselected cell list. process.
  • the LTE system takes the Long Term Evolution (LTE) system as an example:
  • LTE Long Term Evolution
  • the network side can control the user equipment to stay by setting the priority of different frequency points.
  • the cell reselection process is mainly a process in which the base station controls the measurement and reselection of the same-frequency inter-cell and the different-priority inter-frequency cell of the user equipment.
  • the base station in the cell releases the cell at the source working frequency point and restores the cell at the alternate frequency point, the shield of the serving cell at the source working frequency point is seriously degraded. .
  • the signal shield of the neighboring cell in the geographical location is not good, and cannot be reselected to the appropriate neighboring cell; There is no information about the cell on the secondary frequency point before, so that the user equipment must perform a long time cell selection process to reselect the cell to the secondary frequency point.
  • the present invention provides a method, system and device for cell reselection, which is used to solve the problem that the cell reselection delay of the user equipment in the CR system spectrum switching is significantly increased when the cell reselection process existing in the prior art is applied to the CR system.
  • the power overhead problem of cell reselection is increased.
  • the user equipment receives the secondary frequency information from the network side device, and includes information of the at least one secondary frequency point; after determining that the cell reselection is required, the user equipment determines the target cell according to the secondary frequency point information; The user equipment performs cell reselection according to the determined target cell.
  • the network side device determines the alternate frequency point information, where the information includes at least one alternate frequency point;
  • the network side device sends the backup frequency point information to the user equipment, so that after determining that the cell reselection is required, the user equipment determines the target cell according to the backup frequency point information, and according to the determined target The cell performs cell reselection.
  • a receiving module configured to receive spare frequency point information from the network side device, where the information includes at least one alternate frequency point;
  • a target cell determining module configured to determine, according to the alternate frequency point information, a target cell after determining that cell reselection is required
  • a reselection module configured to perform cell reselection according to the determined target cell.
  • a system for cell reselection provided by the embodiment of the present invention includes:
  • a user equipment configured to receive the secondary frequency information from the network side device, where the information includes at least one secondary frequency point; after determining that the cell reselection is required, determining the target cell according to the secondary frequency point information; Performing cell reselection on the target cell;
  • the network side device is configured to determine the alternate frequency point information, and send the alternate frequency point information to the user equipment.
  • the network side device notifies the user equipment of the alternate frequency information of the cell reselection when the spectrum switching is performed, so that the user equipment performs cell reselection according to the alternate frequency point information, thereby reducing the idle state user equipment during spectrum switching.
  • FIG. 1 is a schematic structural diagram of a system for cell reselection according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of user equipment in a system for cell reselection according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another user equipment in a system for cell reselection according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a network side device in a system for cell reselection according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of another network side device in a system for cell reselection according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a method for performing cell reselection by a user equipment according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for a network side device to notify a user equipment of alternate frequency point information according to an embodiment of the present invention
  • FIG. 8 is a flowchart of implementing spectrum switching of a network side device in a cognitive radio system according to an embodiment of the present invention
  • the user equipment determines the target cell according to the alternate frequency point in the alternate frequency information notified by the network side device.
  • the network side device notifies the user equipment of the alternate frequency information of the cell reselection during the spectrum switching, so that the user equipment performs cell reselection according to the alternate frequency point information, thereby reducing the cell reselection delay of the idle state user equipment during spectrum switching. And the power overhead of cell reselection.
  • the embodiment of the present invention is applicable to an LTE system using a CR technology, a Time Division Synchronized Code Division Multiple Access (TD-SCDMA) system, and a Global System for Mobile Communications (GSM) system.
  • Wireless communication systems such as Wide-band Code Division Multiple Access (WCDMA), CDMA-2000, and Wireless Regional Area Network (WRAN).
  • WCDMA Wide-band Code Division Multiple Access
  • CDMA-2000 Code Division Multiple Access-2000
  • WRAN Wireless Regional Area Network
  • the user equipment in the embodiment of the present invention is a user equipment in an idle state.
  • the system for cell reselection in the embodiment of the present invention includes: a user equipment 10 and a network side device 20.
  • the user equipment 10 is configured to receive the secondary frequency point information from the network side device, where the information includes at least one secondary frequency point; after determining that the cell reselection needs to be performed, determining the target cell according to the secondary frequency point information; according to the determined target The cell performs cell reselection;
  • the network side device 20 is configured to determine the alternate frequency point information, and send the backup frequency point information to the user equipment, so that after determining that the cell reselection is required, the user equipment determines the target cell according to the alternate frequency point information, and according to the determined target The cell performs cell reselection.
  • the network side device determines the target cell according to the alternate frequency point information, and performs spectrum switching according to the determined target cell.
  • the network side device in the embodiment of the present invention maintains the alternate frequency point information, and pre-notifies the user equipment backup frequency point information in the cell by using a broadcast manner.
  • the user equipment receives the alternate frequency point information from the network side device by using a broadcast manner.
  • the network side device maintains the alternate frequency point information by accessing the database, sensing, and the like while working.
  • the database mode is: the network side device obtains the usage status of the authorized frequency point by accessing the database or directly obtains the frequency point that the authorization system does not occupy, and selects one or more frequency points from the frequency points that are not occupied by the authorization system. Alternate frequency point
  • the sensing mode is as follows: The network side device determines the usage status of the authorized frequency point through spectrum sensing, and selects one or more frequency points as the alternate frequency point from the frequency points that the authorization system does not occupy.
  • the network side devices may randomly arrange or arrange the alternate frequency points according to the priority. The higher the priority of the alternate frequency points, the higher the priority frequency of the alternate frequency points, and the aligned The alternate frequency point encapsulation is notified to the user equipment in the alternate frequency point information.
  • the network side device determines the priority of the alternate frequency point. For example, the priority of the secondary frequency point is determined according to the availability of the secondary frequency point. The higher the availability of the secondary frequency point, the higher the priority.
  • the alternate frequency information further includes:
  • the cell identifier (ID) of the alternate frequency point is used to indicate that the user equipment determines the cell of the alternate frequency point according to the cell identifier corresponding to the alternate frequency point and the alternate frequency point.
  • the cell identifier on the alternate frequency point may not be sent through the alternate frequency point information, but may be sent separately, as long as the user equipment can determine the cell identifier corresponding to the alternate frequency point.
  • the secondary frequency information may not be included in the cell identifier of a certain alternate frequency point.
  • the network side device and the user equipment may statically agree through a protocol.
  • the cell identifier at the secondary frequency is the source cell identifier.
  • the network side device may broadcast the alternate frequency point information through the broadcast message period; or may send the alternate frequency point information to the user equipment by using the dedicated signaling point-to-point.
  • the network side device may notify the user equipment of the updated alternate frequency information by using a broadcast message.
  • the updated backup frequency information may also be sent to the user equipment by using the dedicated signaling point-to-point.
  • a base station may use a System Information Block (SIB) 2 or a newly defined SIB to carry alternate frequency point information.
  • SIB System Information Block
  • the message format of the alternate frequency point information in the SIB2 carrying the alternate frequency point information is as follows, where backupFreqList is the alternate frequency point information:
  • the network side device decides to perform spectrum switching, it will leave the open source working frequency and recover the cell at the alternate frequency.
  • the network-side device discovers that the authorized user reproduces at the current working frequency by accessing the database or sensing, or the network-side device finds that the current working frequency channel shield decreases to a certain extent (for example, lower than the set threshold). ) When the network side device decides to perform spectrum switching.
  • the network side device selects an alternate frequency point from the alternate frequency information maintained by the network side device as the alternate frequency point of the spectrum switching (the center frequency point of the target cell), is away from the open source working frequency point, and recovers the cell at the alternate frequency point.
  • the base station selects alternate frequency points, such as random selection, sequential selection, and so on.
  • the network side device after determining that the spectrum switching is required, notifies the user equipment source cell in the source cell to be disabled, and triggers the user equipment in the cell to start performing the cell reselection process.
  • Disabling a cell means that the cell prohibits idle user equipment from camping.
  • the CR system uses the existing broadcast message to carry the cell disable command, otherwise the CR system can newly define the broadcast message bearer cell disable command or new in the existing broadcast message. Define the information domain bearer cell disable command.
  • the SIB1 bearer cell disable (cellBarred) field can be used, as follows: cellBarred ENUMERATED ⁇ barred, notBarred ⁇
  • the cell-disabled domain in the SIB1 is set to be barred.
  • the user equipment in the cell is notified that the cell is a disabled cell, and the user equipment in the cell is triggered to start the cell reselection process.
  • the user equipment After determining that the source cell signal measurement value is lower than the first measurement threshold value or after detecting that the source cell is disabled, the user equipment determines that cell reselection is required.
  • the user equipment detects whether a cell disable command is included in the broadcast message: if a cell disable command is detected in the broadcast message, it is determined that the source cell is disabled.
  • the user equipment After determining the target cell, the user equipment determines whether the cell identity on the alternate frequency point can be determined according to the alternate frequency point information, and corresponding to different processing modes.
  • Manner 1 The user equipment cannot determine the cell identity on the alternate frequency point.
  • the user equipment selects one cell from all cells on some or all of the alternate frequency points as the target cell.
  • the user equipment determines a signal measurement value corresponding to part or all of the cells on part or all of the alternate frequency points, selects a signal measurement value from the signal measurement value that is greater than the second measurement threshold, and measures the selected signal.
  • the cell corresponding to the value is used as the target cell.
  • the largest signal measurement can be selected from signal measurements greater than the second measurement threshold.
  • the user equipment may first determine the distance between the user equipment and the network side device. If the distance between the user equipment and the network side device is less than the distance threshold, the user equipment targets the cell corresponding to the selected signal measurement value. Community.
  • the specific judging process may be performed before, after or after the user equipment determines the signal measurement value corresponding to the cell. Or
  • the user equipment may first determine whether there is a frequency point that meets the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the cell corresponding to the selected signal measurement value As a target The target cell; otherwise, select the frequency that meets the cell reselection requirements.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment when the user equipment first determines the distance between the user equipment and the network side device, if the distance between the user equipment and the network side device is not less than the distance threshold, the user equipment may further determine that the information includes the backup frequency point information. Whether some or all of the other available frequency points except the frequency point have no frequency matching the cell reselection requirement, and if yes, the cell corresponding to the selected signal measurement value is used as the target cell; otherwise, the selection meets the cell reselection requirement. Frequency point.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment may not determine the distance between the user equipment and the network side device or determine whether some or all of the other available frequency points except the frequency points included in the alternate frequency point information do not meet the frequency of the cell reselection requirement. Point, but directly the cell corresponding to the selected signal measurement value as the target cell.
  • the user equipment may first determine whether there is no frequency point corresponding to the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the user equipment determines the cell corresponding The signal measurement value; otherwise, the user equipment does not need to determine the signal measurement value corresponding to the cell, but directly selects the frequency point that meets the cell reselection requirement.
  • the part of the other available frequency points is that the corresponding frequency point priority is not less than the frequency point priority corresponding to the frequency point where the source cell is located.
  • the priority of the alternate frequency is determined according to the availability of the secondary frequency. The higher the availability of the secondary frequency, the higher the priority.
  • the user equipment when determining, by the user equipment, the signal measurement value corresponding to the cell, may determine, according to the sequence, the signal measurement value corresponding to the cell on the alternate frequency point, and the signal measurement value corresponding to the cell at one of the alternate frequency points is greater than the second measurement. After the threshold, stop determining the signal measurement value corresponding to other cells. That is, the user equipment may not need to determine all the alternate frequency points, and all the cells on one of the alternate frequency points, only after determining that the signal measurement value corresponding to one cell on one of the alternate frequency points is greater than the second measurement threshold.
  • the cell can be determined as the target cell, and then the signal measurement values corresponding to the other cells are determined to be determined at the alternate frequency point, and the signal measurement values corresponding to the cells on the other alternate frequency points are stopped.
  • the execution mode can be one of the following ways:
  • the user equipment starts to measure the alternate frequency point in the set of alternate frequency points. When there is a certain frequency in the set of spare frequency points, the signal measurement value of the cell with the best signal measurement value is greater than the preset second threshold value. , the user equipment is re-selected to the standby The best cell is measured with the signal at the frequency point. If the signal measurement value of the cell with the best signal measurement value at all the alternate frequency points in the set of alternate frequency points is less than or equal to the preset second threshold value, the user equipment determines that the signal measurement value at the alternate frequency point is the best. The cell is the target cell and is reselected to the target cell.
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold, the user equipment starts to measure the alternate frequency point in the set of the alternate frequency point, and when the standby frequency point is set, The signal measurement value of the cell with the best signal measurement value at a certain alternate frequency point is greater than the preset second threshold value, and there is no high priority frequency point and the same priority frequency point (compared with the frequency point of the source cell)
  • the user equipment determines that the cell with the best signal measurement value at the alternate frequency point is the target cell and reselects the target cell.
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold, the cell with no high priority frequency and the same priority frequency meets the reselection requirement.
  • the user equipment starts to measure the alternate frequency point in the set of alternate frequency points, when there is a signal frequency value of the cell with the best signal measurement value in the spare frequency point set, the signal measurement value of the cell with the best signal value is greater than the preset second threshold value.
  • the user equipment determines that the cell with the best signal measurement value at the alternate frequency point is the target cell, and reselects the target cell.
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold, the user equipment starts to measure the alternate frequency point in the set of the backup frequency point, and when the standby frequency point is set, The signal measurement value of the cell with the best signal measurement value at a certain alternate frequency point is greater than the preset second threshold value, and there is no high priority frequency point, the same frequency point, and the low priority frequency point (with the source cell)
  • the user equipment determines that the cell with the best signal measurement value at the alternate frequency point is the target cell, and reselects the target cell.
  • the user equipment measures the signal measurement value of the source cell, when the signal measurement value of the source cell is lower than the preset first threshold, and there is no high priority frequency point, the same frequency point, and the low priority frequency point (and When the cell of the source cell is compared with the reselection requirement, the user equipment starts to measure the alternate frequency point in the set of alternate frequency points, and when there is a cell with the best signal measurement value at the alternate frequency point in the set of the alternate frequency point When the signal measurement value is greater than the preset second threshold value, the user equipment determines that the cell with the best signal measurement value at the alternate frequency point is the target cell, and reselects the target cell.
  • the user equipment may perform measurement on the alternate frequency point in the set of alternate frequency points in the order of the alternate frequency points in the set of the alternate frequency points, or may perform the backup frequency points in the set of the alternate frequency points in a random order. The measurement is performed until the user equipment reselects to the appropriate target cell, or the user equipment has traversed all the alternate frequency points in the set of alternate frequency points.
  • the user equipment may measure the set of spare frequency points within a set duration after the initial measurement is turned on, or may measure the set of N1 secondary frequency points, and N1 is a positive integer.
  • Manner 2 The user equipment can determine the cell identifier on the alternate frequency point.
  • the user equipment uses the cell identifier of the source cell as the cell identifier corresponding to each backup frequency point, or receives the cell identifier corresponding to each spare frequency point of the network side device;
  • the user equipment determines, according to the alternate frequency point information and the cell identifier corresponding to the alternate frequency point, that each of the alternate frequency points is small. A zone, and selecting one of the determined cells as the target cell.
  • the user equipment determines a signal measurement value corresponding to a cell on a part or all of the alternate frequency points, selects a signal measurement value from a signal measurement value that is greater than the second measurement threshold, and corresponds the selected signal measurement value.
  • the cell serves as a target cell.
  • the user equipment may first determine the distance between the user equipment and the network side device. If the distance between the user equipment and the network side device is less than the distance threshold, the user equipment targets the cell corresponding to the selected signal measurement value. Community.
  • the specific judging process may be performed before, after or after the user equipment determines the signal measurement value corresponding to the cell. Or
  • the user equipment may first determine whether there is a frequency point that meets the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the cell corresponding to the selected signal measurement value As the target cell; otherwise, select the frequency that meets the cell reselection requirements.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment when the user equipment first determines the distance between the user equipment and the network side device, if the distance between the user equipment and the network side device is not less than the distance threshold, the user equipment may further determine that the information includes the backup frequency point information. Whether some or all of the other available frequency points except the frequency point have no frequency matching the cell reselection requirement, and if yes, the cell corresponding to the selected signal measurement value is used as the target cell; otherwise, the selection meets the cell reselection requirement. Frequency point.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment may not determine the distance between the user equipment and the network side device or determine whether some or all of the other available frequency points except the frequency points included in the alternate frequency point information do not meet the frequency of the cell reselection requirement. Point, but directly the cell corresponding to the selected signal measurement value as the target cell.
  • the user equipment may first determine whether there is no frequency point corresponding to the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the user equipment determines the cell corresponding The signal measurement value; otherwise, the user equipment does not need to determine the signal measurement value corresponding to the cell, but directly selects the frequency point that meets the cell reselection requirement.
  • the part of the other available frequency points is that the corresponding frequency point priority is not less than the frequency point priority corresponding to the frequency point where the source cell is located.
  • the priority of the alternate frequency is determined according to the availability of the secondary frequency. The higher the availability of the secondary frequency, the higher the priority.
  • the user equipment when determining, by the user equipment, the signal measurement value corresponding to the cell, may determine, according to the sequence, the signal measurement value corresponding to the cell on the alternate frequency point, and the signal measurement value corresponding to the cell at one of the alternate frequency points is greater than the second measurement.
  • the threshold stop determining the signal measurement value corresponding to other cells. That is to say, the user equipment may not need to determine the cells on all the alternate frequency points, and only need to determine that the signal measurement value corresponding to one cell on one of the alternate frequency points is greater than the second measurement.
  • the cell can be determined as the target cell, and then the signal measurement value corresponding to the other cell is determined to be determined at the alternate frequency point, and the signal measurement value corresponding to the cell at the other alternate frequency point is stopped.
  • the cell identifier on the alternate frequency point may determine the set of the spare cell, and determine the target cell according to the set of the spare cell.
  • the specific execution mode of the cell reselection may take one of the following methods:
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold
  • the user equipment starts to measure the target cell in the set of the reserved cell, and when there is a certain set in the set of the reserved cell,
  • the signal measurement value of the spare cell is greater than the preset second threshold
  • the user equipment determines that the standby is the target cell and reselects to the target cell. If the signal measurement values of all target cells in the set of spare cells are less than or equal to the preset second threshold, the user equipment performs a conventional cell reselection procedure.
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold, the user equipment starts to measure the target cell in the set of the reserved cell, and when there is a certain set in the set of the reserved cell
  • the signal measurement value of the target cell is greater than the preset second threshold, and the cell with no high priority frequency and the same priority frequency (compared with the frequency of the source cell) meets the reselection requirement, the user equipment determines The standby is the target cell and is reselected to the target cell.
  • the user equipment measures the signal measurement value of the source cell.
  • the user equipment starts to measure the target cell in the set of the standby cell.
  • the signal measurement value of the target cell in the set of the standby cell is greater than the preset second threshold, the user equipment determines that the standby is the target cell, and reselects the target. Community.
  • the user equipment measures the signal measurement value of the source cell.
  • the signal measurement value of the source cell is lower than the preset first threshold, the user equipment starts to measure the target cell in the set of the reserved cell, and when there is a certain set in the set of the reserved cell, The signal measurement value of the target cell is greater than the preset second threshold, and the cell with no high priority frequency, the same frequency, and the low priority frequency (compared with the frequency of the source cell) meets the reselection requirement.
  • the user equipment determines that the standby is the target cell and reselects to the target cell.
  • the user equipment measures the signal measurement value of the source cell, when the signal measurement value of the source cell is lower than the preset first threshold, and there is no high priority frequency point, the same frequency point, and the low priority frequency point (and When the cell of the source cell meets the reselection requirement, the user equipment starts to measure the target cell in the set of the standby cell. When the cell measurement value of the spare cell in the set of the standby cell is greater than the preset second threshold, The user equipment determines that the standby is the target cell and reselects to the target cell.
  • the user equipment may perform measurement on the target cell in the set of the standby cell in the order of the target cell in the set of the reserved cell, or perform measurement on the target cell in the set of the reserved cell in a random order. The process until the user equipment reselects to the appropriate target cell, or the user equipment has traversed all target cells in the set of spare cells.
  • the foregoing threshold value may be specified in the protocol; or may be set by the network side device and broadcast in the cell, and the user equipment acquires the preset threshold by reading the broadcast message; or may be set by the user equipment.
  • RSRP Reference signal received power
  • RSRQ Reference Signal Received Quality
  • the different measurements are compared to the corresponding threshold when compared to the threshold.
  • the signal measurement value is an RSRP value and an RSRQ value.
  • the RSRP value is compared with a first measurement threshold corresponding to the RSRP value, and the first measurement gate corresponding to the RSRQ value and the RSRQ value is compared. Limits are compared.
  • the signal measurement value at the alternate frequency point or cell is more than the above measured value, if all the measured values are greater than the threshold value, it is determined that the signal measurement value is greater than the threshold value; if some of the measured values are greater than the gate If the limit value is greater than the threshold value, the signal measurement value is greater than the threshold value, and the signal measurement value is greater than the threshold as long as all the measured values are greater than the threshold value. Limit.
  • one signal measurement value may be selected (ie, the selected signal measurement value has the highest priority), and only the selected signal measurement value and the gate need to be selected. Limits are compared.
  • the priority can be statically specified by the protocol, or the network-side device notifies the user equipment of the selected priority, or the user equipment determines it.
  • the signal measurement value on the source cell is a plurality of the above measured values, if all the measured values are lower than the threshold value, it is determined that the signal measurement value is lower than the threshold value; or if some of the measured values are partially lower than Threshold value, and the number of signal measurement values below the threshold value is greater than the number of signal measurement values not lower than the threshold value, then the signal measurement value is determined to be lower than the threshold value, and may be included in all the measurement values. If there is a threshold below, the signal measurement is determined to be below the threshold.
  • one signal measurement value may be selected (ie, the selected signal measurement value has the highest priority), and only the selected signal measurement value and the threshold value need to be performed. Comparison.
  • the priority can be statically specified by the protocol, or the network-side device notifies the user equipment of the selected priority, or the user device decides at its own discretion.
  • the network side device in the embodiment of the present invention may be a base station (such as a macro base station, a home base station, etc.), or may be an RN (successor) device, or may be another network side device.
  • a base station such as a macro base station, a home base station, etc.
  • RN RN (successor) device
  • the user equipment in the system for cell reselection includes: a receiving module 200, a target cell determining module 210, and a reselecting module 220.
  • the receiving module 200 is configured to receive alternate frequency point information from the network side device, where the information includes at least one alternate frequency point;
  • the target cell determining module 210 is configured to determine, according to the alternate frequency point information, the target cell after determining that the cell reselection needs to be performed;
  • the reselection module 220 is configured to perform cell reselection according to the determined target cell.
  • the receiving module 200 is specifically configured to:
  • the alternate frequency point information from the network side device is received by broadcast.
  • the target cell determining module 210 is specifically configured to:
  • the target cell determining module 210 is specifically configured to:
  • One cell is selected as a target cell from all cells on some or all of the alternate frequency points.
  • the target cell determining module 210 is specifically configured to:
  • the target cell determining module 210 is specifically configured to:
  • the cell identifier of the source cell is used as the cell identifier corresponding to each of the alternate frequency points, or the cell identifier corresponding to each spare frequency point from the network side device is received; and each of the cell identifiers corresponding to the alternate frequency point is determined according to the alternate frequency point information and the cell identifier corresponding to the alternate frequency point. A cell on the alternate frequency point, and selecting one of the determined cells as the target cell.
  • the target cell determining module 210 is specifically configured to:
  • the target cell determining module 210 is specifically configured to:
  • the signal measurement value corresponding to the cell at the alternate frequency point is determined in sequence, and after the signal measurement value corresponding to the cell is greater than the second measurement threshold value at an alternate frequency point, the signal measurement value corresponding to the other cell is stopped.
  • the target cell determining module 210 is further configured to:
  • the distance between the user equipment and the network side device is less than the distance threshold; or determining that, after some or all of the other available frequency points except the frequency point included in the alternate frequency information, there is no frequency matching the cell reselection requirement
  • the cell corresponding to the selected signal measurement value is used as the target cell.
  • the target cell determining module 210 is further configured to:
  • some of the other available frequency points have a corresponding frequency point priority that is not less than a frequency point priority corresponding to the frequency point where the source cell is located.
  • another user equipment in the cell reselection system of the embodiment of the present invention includes: a memory 230 and a processor 240.
  • the processor 240 is configured with a computer program or the like for executing the method on the user equipment side to implement the function of the user equipment side described in the embodiment of the present invention; the memory 230 is configured to store the code of the computer program, The processor 240 can be configured to include a baseband processing component, a radio frequency processing component, and the like according to actual needs, and can implement data transceiving functions. A detailed description of the functions of the memory 230 and the processor 240 is given below.
  • the processor 240 receives the alternate frequency point information from the network side device, where the information includes at least one alternate frequency point;
  • the processor 240 after determining that the cell reselection needs to be performed, determines the target cell according to the alternate frequency point information; and the processor 240 performs the cell reselection on the determined target cell.
  • the processor 240 receives the alternate frequency point information from the network side device by means of a broadcast.
  • the processor 240 determines that cell reselection is required after determining that the source cell signal measurement value is lower than the first measurement threshold or after detecting that the source cell is disabled.
  • the processor 240 selects one of the cells from some or all of the alternate frequency points as the target cell.
  • the processor 240 determines a signal measurement value corresponding to part or all of the cells on some or all of the alternate frequency points, selects a signal measurement value from the signal measurement value that is greater than the second measurement threshold value, and selects the selected signal.
  • the cell corresponding to the measured value is used as the target cell.
  • the processor 240 uses the cell identifier of the source cell as the cell identifier corresponding to each backup frequency point, or receives the cell identifier corresponding to each backup frequency point from the network side device; corresponding to the alternate frequency point information and the alternate frequency point.
  • the cell identifier determines a cell at each of the alternate frequency points, and selects one of the determined cells as the target cell.
  • the processor 240 determines a signal measurement value corresponding to the cell at part or all of the alternate frequency points, selects a signal measurement value from the signal measurement value greater than the second measurement threshold value, and corresponds the selected signal measurement value.
  • the cell is the target cell.
  • the processor 240 sequentially determines the signal measurement value corresponding to the cell at the alternate frequency point, and stops determining the corresponding cell corresponding to the cell measurement value corresponding to the cell at a secondary frequency point. Signal measurement.
  • the processor 240 determines that the distance between the user equipment and the network side device is less than the distance threshold; or determines that there is no matching cell among some or all of the other available frequency points except the frequency point included in the alternate frequency point information. After reselecting the required frequency point, the cell corresponding to the selected signal measurement value is used as the target cell. Preferably, the processor 240 determines that the signal measurement value corresponding to the cell is determined after the frequency point that does not meet the cell reselection requirement is selected in some or all of the other available frequency points except the frequency point included in the alternate frequency point information.
  • some of the other available frequency points have a corresponding frequency point priority that is not less than a frequency point priority corresponding to the frequency point where the source cell is located.
  • the network side device in the system for cell reselection according to the embodiment of the present invention includes: a frequency point information determining module.
  • the frequency point information determining module 300 is configured to determine the alternate frequency point information, where the information includes the at least one alternate frequency point, and the sending module 310 is configured to send the standby frequency point information to the user equipment, so that the user equipment determines that the cell weight is required. After the selection, the target cell is determined according to the alternate frequency point information, and cell reselection is performed according to the determined target cell.
  • the alternate frequency point information further includes a target cell identifier on the alternate frequency point.
  • the sending module 300 is specifically configured to:
  • the alternate frequency point information is sent to the user equipment by using a broadcast message.
  • the sending module 300 is specifically configured to:
  • the user equipment source cell in the source cell is notified to be disabled.
  • the frequency point information determining module 300 determines the target cell according to the alternate frequency point information, and performs spectrum switching according to the determined target cell.
  • another network side device in the system for cell reselection includes: a memory 320 and a processor 330.
  • the processor 330 is configured with a computer program or the like for performing the method on the network device side to implement the function of the network device side described in the embodiment of the present invention; the memory 320 is configured to store the code of the computer program.
  • the processor 330 can be configured to include a baseband processing component, a radio frequency processing component, and the like according to actual needs, and can implement data transceiving functions. A detailed description of the functions of the memory 320 and the processor 330 is given below.
  • the processor 330 is configured to determine alternate frequency point information, where the information includes at least one alternate frequency point;
  • the processor 330 sends the alternate frequency point information to the user equipment, so that after determining that the cell reselection is required, the user equipment determines the target cell according to the secondary frequency point information, and performs cell reselection according to the determined target cell.
  • the alternate frequency point information further includes a target cell identifier on the alternate frequency point.
  • the processor 330 transmits the alternate frequency point information to the user equipment by using a broadcast message.
  • the processor 330 After the processor 330 notifies the user equipment of the determined alternate frequency point information, after determining that the spectrum switching needs to be performed, the user equipment source cell in the source cell is notified to be disabled.
  • the processor 330 determines the target cell according to the alternate frequency point information, and performs spectrum switching according to the determined target cell.
  • the embodiment of the present invention further provides a method for a user equipment to perform cell reselection and a method for a network side device to notify a user equipment of alternate frequency point information, and the principle of solving the problem by these methods and the cell of the embodiment of the present invention.
  • the system of reselection is similar, so the implementation of these methods can be seen in the implementation of the system, and the repetition will not be repeated.
  • the method for performing cell reselection by a user equipment includes the following steps:
  • Step 401 The user equipment receives the alternate frequency point information from the network side device, where the information includes at least one alternate frequency point.
  • Step 402 After determining that the cell reselection is required, the user equipment determines the target cell according to the alternate frequency point information.
  • Step 403 The user equipment performs cell reselection according to the determined target cell.
  • the user equipment receives the alternate frequency point information from the network side device by using a broadcast manner.
  • the user equipment determines that cell reselection is required after determining that the source cell signal measurement value is lower than the first measurement threshold or after detecting that the source cell is disabled.
  • the user equipment After determining the target cell, the user equipment determines whether the cell identity on the alternate frequency point can be determined according to the alternate frequency point information, and corresponding to different processing modes.
  • Manner 1 The user equipment cannot determine the cell identity on the alternate frequency point.
  • the user equipment selects one cell from all cells on some or all of the alternate frequency points as the target cell.
  • the user equipment determines a signal measurement value corresponding to part or all of the cells on part or all of the alternate frequency points, selects a signal measurement value from the signal measurement value that is greater than the second measurement threshold, and measures the selected signal.
  • the cell corresponding to the value is used as the target cell.
  • the user equipment may first determine the distance between the user equipment and the network side device. If the distance between the user equipment and the network side device is less than the distance threshold, the user equipment targets the cell corresponding to the selected signal measurement value. Community.
  • the specific judging process may be performed before, after or after the user equipment determines the signal measurement value corresponding to the cell. Or
  • the user equipment may first determine whether there is a frequency point that meets the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the cell corresponding to the selected signal measurement value As the target cell; otherwise, select the frequency that meets the cell reselection requirements.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment may first determine whether there is no frequency point corresponding to the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the user equipment determines the cell corresponding The signal measurement value; otherwise, the user equipment does not need to determine the signal measurement value corresponding to the cell, but directly selects the frequency point that meets the cell reselection requirement.
  • the part of the other available frequency points is that the corresponding frequency point priority is not less than the frequency point priority corresponding to the frequency point where the source cell is located.
  • the user equipment when determining, by the user equipment, the signal measurement value corresponding to the cell, may determine the secondary frequency point in sequence.
  • the signal measurement value corresponding to the cell and after the signal measurement value corresponding to the cell is greater than the second measurement threshold value at one of the alternate frequency points, stop determining the signal measurement value corresponding to the other cell. That is, the user equipment may not need to determine all the alternate frequency points, and all the cells on one of the alternate frequency points, only after determining that the signal measurement value corresponding to one cell on one of the alternate frequency points is greater than the second measurement threshold.
  • the cell can be determined as the target cell, and then the signal measurement values corresponding to the other cells are determined to be determined at the alternate frequency point, and the signal measurement values corresponding to the cells on the other alternate frequency points are stopped.
  • Manner 2 The user equipment can determine the cell identifier on the alternate frequency point.
  • the user equipment uses the cell identifier of the source cell as the cell identifier corresponding to each backup frequency point, or receives the cell identifier corresponding to each spare frequency point of the network side device;
  • the user equipment determines the cell on each of the alternate frequency points according to the alternate frequency point information and the cell identifier corresponding to the alternate frequency point, and selects one cell from the determined all cells as the target cell.
  • the user equipment determines a signal measurement value corresponding to a cell on a part or all of the alternate frequency points, selects a signal measurement value from a signal measurement value that is greater than the second measurement threshold, and corresponds the selected signal measurement value.
  • the cell serves as a target cell.
  • the user equipment may first determine the distance between the user equipment and the network side device. If the distance between the user equipment and the network side device is less than the distance threshold, the user equipment targets the cell corresponding to the selected signal measurement value. Community.
  • the specific judging process may be performed before, after or after the user equipment determines the signal measurement value corresponding to the cell. Or
  • the user equipment may first determine whether there is a frequency point that meets the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the cell corresponding to the selected signal measurement value As the target cell; otherwise, select the frequency that meets the cell reselection requirements.
  • the specific judging process may be performed before, after, or simultaneously with the signal measurement value corresponding to the determined cell, by the user equipment determining the signal measurement value corresponding to the cell.
  • the user equipment may first determine whether there is no frequency point corresponding to the cell reselection requirement in some or all of the other available frequency points except the frequency point included in the alternate frequency point information, and if yes, the user equipment determines the cell corresponding The signal measurement value; otherwise, the user equipment does not need to determine the signal measurement value corresponding to the cell, but directly selects the frequency point that meets the cell reselection requirement.
  • the part of the other available frequency points is that the corresponding frequency point priority is not less than the frequency point priority corresponding to the frequency point where the source cell is located.
  • the user equipment when determining, by the user equipment, the signal measurement value corresponding to the cell, may determine, according to the sequence, the signal measurement value corresponding to the cell on the alternate frequency point, and the signal measurement value corresponding to the cell at one of the alternate frequency points is greater than the second measurement. After the threshold, stop determining the signal measurement value corresponding to other cells. That is, the user equipment may not need to determine the cells on all the alternate frequency points, and only needs to determine that the cell is the target after determining that the signal measurement value corresponding to one cell on one of the alternate frequency points is greater than the second measurement threshold. The cell then stops determining the corresponding cell at the alternate frequency point. Signal measurement values, and stop determining signal measurements corresponding to cells at other alternate frequency points.
  • the method for the network side device to notify the user equipment of the alternate frequency point information includes: Step 501: The network side device determines the alternate frequency point information, where the backup frequency point information includes at least one alternate frequency point; Step 502 The network side device sends the alternate frequency point information to the user equipment, so that after determining that the cell reselection needs to be performed, the user equipment determines the target cell according to the secondary frequency point information, and performs cell reselection according to the determined target cell.
  • the alternate frequency point information further includes a target cell identifier on the alternate frequency point.
  • the network side device notifies the user equipment of the determined alternate frequency point information, including:
  • the network side device sends the alternate frequency point information to the user equipment by using a broadcast message.
  • the method further includes:
  • the network side device After determining that spectrum switching is required, the network side device notifies the user equipment source cell in the source cell to be disabled.
  • the method for performing spectrum switching by a base station in a cognitive radio system includes: Step 601: A base station operates at a source working frequency point;
  • Step 602 The base station maintains the alternate frequency point information, and broadcasts the alternate frequency point information in the cell.
  • Step 603 the base station determines whether it is necessary to perform spectrum switching, and if yes, step 604 is performed; otherwise, step 602 is performed;
  • Step 604 The base station performs a spectrum switching process, and recovers the cell at the target frequency point from the open source working frequency point.
  • the method for performing cell reselection by a user equipment in a cognitive radio system includes: Step 701: A user equipment runs at a source working frequency point;
  • Step 702 The user equipment receives the broadcast message and obtains the alternate frequency point information.
  • Step 703 The user equipment determines whether cell reselection is required, and if yes, step 704 is performed; otherwise, step 702 is returned;
  • Step 704 The user equipment determines the target cell according to the recently acquired alternate frequency point information, and performs a cell reselection process according to the determined target cell.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明实施例涉及无线通信技术领域,特别涉及一种小区重选的方法、系统和设备,用以解决现有技术中存在的小区重选过程应用于CR系统时,明显增加了CR系统频谱切换时用户设备小区重选延迟,增加了小区重选的功率开销问题。本发明实施例的方法包括:用户设备接收来自网络侧设备的备用频点信息,其中包括至少一个备用频点的信息,在确定需要进行小区重选后,根据所述备用频点信息,确定目标小区;根据确定的目标小区进行小区重选。由于网络侧设备将进行频谱切换时小区重选的备用频点信息通知用户设备,以使所述用户设备根据所述备用频点信息进行小区重选,从而降低了频谱切换时空闲态用户设备的小区重选延迟和小区重选的功率开销。

Description

一种小区重选的方法、 系统和设备
本申请要求在 2013年 4月 28日提交中国专利局、 申请号为 201310155636.9、发明名称 为"一种小区重选的方法、 系统和设备"的中国专利申请的优先权, 其全部内容通过引用结 合在本申请中。 技术领域
本发明涉及无线通信技术领域, 特别涉及一种小区重选的方法、 系统和设备。 背景技术
无线电通信频语是一种宝贵的自然资源, 随着无线通信技术的飞快发展, 频谱资源贫 乏的问题日益严重, 为了緩解频谱资源紧张的现状, 相关的部门和机构对无线通信频谱进 行了监测和研究, 发现某些频段(如电视频段)在大多数时间内并未使用或者在大多数地 域内并未使用, 而某些频段则出现了多系统多用户同时竟争的情况, 即频谱资源的使用存 在不均衡的现象。 认知无线电 (Cognitive Radio, CR ) 的概念正是在这种背景下产生的, 其基本思想是: 在不对授权系统造成千扰的前提下, 认知无线电系统可以通过监测当前无 线环境的变化来动态机会式地接入空白频段进行通信。
当认知无线电系统机会式接入授权系统的空白频谱时, 前提是保护授权系统业务不受 到 CR系统的有害千扰, 这就要求:
1、 认知无线电系统准确判断出授权系统频段的空白频谱的能力;
2、 频谱切换, 即 CR系统发现授权系统在当前使用的空白频谱(源工作频点)上重新 出现, CR系统及时退出当前使用的空白频谱,并将整个 CR系统切换到其他的空白频谱(目 标工作频点)上恢复业务的过程。
传统的无线通信系统中, 空闲态用户设备在小区选择之后, 需要随时监视服务小区和 /或邻近小区的信号盾量,并根据信号盾量选择一个优先级更高或者信道盾量更好的小区驻 留, 这个过程就是小区重选。 传统的无线通信系统的小区重选过程主要包括: 用户设备测 量服务小区的信号盾量, 并根据优先级参数等条件联合确定是否测量邻近小区, 并根据测 量的邻近小区的信号盾量信息维护重选小区列表; 用户设备根据服务小区与邻近小区的信 号盾量信息, 或者用户设备通过系统信息确定小区是否被禁止等条件确定是否触发小区重 选, 并根据重选小区列表执行具体的小区重选过程。
以长期演进(Long Term Evolution, LTE ) 系统为例: LTE系统, 在小区重选中引入了 优先级的概念, 网络侧通过设置不同频点的优先级, 可以达到控制用户设备驻留的目的。 小区重选过程主要是由基站控制用户设备同频小区、 不同优先级异频小区测量及重选的过 程。 对于釆用 CR技术的无线通信系统, 在频谱切换过程中, 当小区内的基站释放源工作 频点上的小区并在备用频点恢复小区后, 源工作频点上服务小区的盾量严重下降。 如果按 照目前的小区重选过程, 对于位于小区中心的用户设备, 一方面, 地理位置上相邻小区的 信号盾量并不好, 无法重选到合适的相邻小区上; 另一方面, 由于之前没有备用频点上小 区的相关信息, 导致用户设备必须执行耗时很长的小区选择过程才能重选到备用频点的小 区上。
综上所述, 目前的小区重选过程应用于 CR系统时, 明显增加了 CR系统频谱切换时 的用户设备小区重选延迟, 增加了小区重选的功率开销。 发明内容
本发明提供一种小区重选的方法、 系统和设备, 用以解决现有技术中存在的小区重选 过程应用于 CR系统时, 明显增加了 CR系统频谱切换时的用户设备小区重选延迟, 增加 了小区重选的功率开销问题。
本发明实施例提供的一种小区重选的方法, 包括:
用户设备接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的信息; 所述用户设备在确定需要进行小区重选后, 根据所述备用频点信息, 确定目标小区; 所述用户设备根据确定的所述目标小区进行小区重选。
本发明实施例提供的另一种小区重选的方法, 包括:
网络侧设备确定备用频点信息, 其中包括至少一个备用频点的信息;
所述网络侧设备向所述用户设备发送备用频点信息, 以使所述用户设备在确定需要进 行小区重选后, 根据所述备用频点信息, 确定目标小区, 并根据确定的所述目标小区进行 小区重选。
本发明实施例提供的一种小区重选的用户设备, 包括:
接收模块, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的 信息;
目标小区确定模块, 用于在确定需要进行小区重选后, 根据所述备用频点信息, 确定 目标小区;
重选模块, 用于根据确定的所述目标小区进行小区重选。
本发明实施例提供的一种小区重选的网络侧设备, 包括:
频点信息确定模块, 用于确定备用频点信息, 其中包括至少一个备用频点的信息; 发送模块, 用于向所述用户设备发送备用频点信息, 以使所述用户设备在确定需要进 行小区重选后, 根据所述备用频点信息, 确定目标小区, 并根据确定的所述目标小区进行 小区重选。 本发明实施例提供的一种小区重选的系统, 包括:
用户设备, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的 信息; 在确定需要进行小区重选后, 根据所述备用频点信息, 确定目标小区; 根据确定的 所述目标小区进行小区重选;
网络侧设备, 用于确定备用频点信息, 向所述用户设备发送备用频点信息。
由于网络侧设备将进行频谱切换时小区重选的备用频点信息通知用户设备, 以使所述 用户设备根据所述备用频点信息进行小区重选, 从而降低了频谱切换时空闲态用户设备的 小区重选延迟和小区重选的功率开销。 附图说明
图 1为本发明实施例小区重选的系统结构示意图;
图 2为本发明实施例小区重选的系统中用户设备的结构示意图;
图 3为本发明实施例小区重选的系统中另一种用户设备的结构示意图;
图 4为本发明实施例小区重选的系统中网络侧设备的结构示意图;
图 5为本发明实施例小区重选的系统中另一种网络侧设备的结构示意图;
图 6为本发明实施例用户设备进行小区重选的方法流程示意图;
图 7为本发明实施例网络侧设备通知用户设备备用频点信息的方法流程示意图; 图 8为本发明实施例认知无线电系统中网络侧设备频谱切换的实现流程图; 图 9为本发明实施例认知无线电系统中用户设备小区重选的实现流程图。 具体实施方式
本发明实施例用户设备在确定需要进行小区重选后, 根据网络侧设备通知的备用频点 信息中的备用频点, 确定目标小区。 由于网络侧设备将进行频谱切换时小区重选的备用频 点信息通知用户设备, 以使用户设备根据备用频点信息进行小区重选, 从而降低了频谱切 换时空闲态用户设备的小区重选延迟和小区重选的功率开销。
其中,本发明实施例适用于釆用 CR技术的 LTE系统、时分同步码分多址( Time Division Synchronized Code Division Multiple Access, TD-SCDMA )系统、全球移动通信系统( Global System for Mobile Communications, GSM )、 宽带码分多址接入 ( Wide-band Code Division Multiple Access, WCDMA )、 CDMA-2000和无线区域网 ( Wireless Regional Area Network, WRAN )等无线通信系统。
本发明实施例的用户设备是处于空闲 (idle ) 态的用户设备。
在下面的说明过程中, 先从网络侧和用户设备侧的配合实施进行说明, 最后分别从网 络侧与用户设备侧的实施进行说明, 但这并不意味着二者必须配合实施, 实际上, 当网络 侧与用户设备侧分开实施时, 也解决了分别在网络侧、 用户设备侧所存在的问题, 只是二 者结合使用时, 会获得更好的技术效果。
如图 1所示, 本发明实施例小区重选的系统包括: 用户设备 10和网络侧设备 20。 用户设备 10, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点 的信息; 在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区; 根据确定的目 标小区进行小区重选;
网络侧设备 20, 用于确定备用频点信息; 向用户设备发送备用频点信息, 以使用户设 备在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区, 并根据确定的目标小 区进行小区重选。
在实施中, 网络侧设备在确定需要进行频谱切换后, 根据备用频点信息, 确定目标小 区, 并根据确定的目标小区进行频谱切换。
其中, 本发明实施例的网络侧设备维护备用频点信息, 通过广播方式预先通知小区内 的用户设备备用频点信息。
相应的, 用户设备通过广播方式接收来自网络侧设备的备用频点信息。
网络侧设备在工作时通过接入数据库、 感知等方式维护备用频点信息。
具体的, 数据库方式为: 网络侧设备通过接入数据库获取授权频点的使用状态或者直 接获取授权系统未占用的频点, 并从授权系统未占用的频点中选择一个或者多个频点作为 备用频点;
感知方式为: 网络侧设备通过频谱感知确定授权频点的使用状态, 并从授权系统未占 用的频点中选择一个或者多个频点作为备用频点。
当备用频点信息存在多个备用频点时, 网络侧设备可随机排列或者按照优先级排列 备用频点, 备用频点的优先级越高, 备用频点排序越靠前, 并将排列后的备用频点封装在 备用频点信息中通知给用户设备。
网络侧设备确定备用频点的优先级的方式有很多, 比如根据备用频点的可用程度确定 其优先级, 备用频点的可用程度越高, 其优先级也越高。
较佳地, 备用频点信息还进一步可包括:
备用频点上的小区标识( ID ), 用于指示用户设备根据备用频点和备用频点对应的小 区标识, 确定备用频点的小区。
在实施中, 备用频点上的小区标识也可以不通过备用频点信息发送, 而是单独发送, 只要保证用户设备能够确定备用频点对应的小区标识即可。
备用频点信息的消息格式如下表所示: 表 1.本发明技术方案中的备用频点信息消息格式
Figure imgf000007_0001
当然, 备用频点信息也可以不包含在某备用频点上的小区标识, 这时网络侧设备与用 户设备可以通过协议静态约定。 比如, 当备用频点信息不包含在某备用频点上的小区标识 时, 在该备用频点上的小区标识为源小区标识。 还比如可以约定当备用频点信息不包含在 某备用频点上的小区标识时, 该备用频点上的所有小区都是备选小区。
网络侧设备可以通过广播消息周期广播备用频点信息; 也可以通过专用信令点对点的 向用户设备发送备用频点信息。
当备用频点信息有更新时, 网络侧设备可以通过广播消息通知用户设备更新的备用频 点信息; 也可以通过专用信令点对点的向用户设备发送更新后的备用频点信息。
比如, 在 LTE系统中, 基站可釆用系统信息块( System Information Block, SIB ) 2或 者新定义 SIB承载备用频点信息。
具体地, 针对 LTE系统, 承载备用频点信息的 SIB2中备用频点信息的消息格式如下, 其中 backupFreqList为备用频点信息:
backupFreqList BackupFreqList OPTIONAL, -- Need ON 网络侧设备在决策需要执行频谱切换后, 离开源工作频点, 并在备用频点恢复小区。 其中, 网络侧设备通过接入数据库或者感知等方式发现授权用户在当前工作频点上重 现, 或者网络侧设备发现当前工作频点信道盾量下降到一定程度 (比如低于设定门限值) 时, 网络侧设备决策需要执行频谱切换。
网络侧设备从其维护的备用频点信息中选择一个备用频点作为频谱切换的备用频点 (目标小区的中心频点), 离开源工作频点, 并在备用频点恢复小区。 基站选择备用频点 的方式有很多, 比如随机选择, 按照顺序选择等。
可选地, 网络侧设备在确定需要进行频谱切换后, 通知源小区内的用户设备源小区禁 用, 触发小区内的用户设备开始执行小区重选过程。 禁用小区是指该小区禁止空闲态用户 设备驻留。
如果 CR系统已有的广播消息中包含小区禁用命令, 则 CR系统釆用已有的广播消息 承载小区禁用命令, 否则 CR系统可新定义广播消息承载小区禁用命令或者在已有的广播 消息中新定义信息域承载小区禁用命令。
例如, 在 LTE系统中, 可以釆用 SIB1承载小区禁用 (cellBarred )域, 如下格式: cellBarred ENUMERATED {barred, notBarred}
网络侧设备在决策执行频谱切换时, 将 SIB1 中的小区禁用域设置为禁用 (barred ), 通知小区内的用户设备本小区已为禁用小区, 触发小区内的用户设备开始执行小区重选过 程。
对于本发明实施例的用户设备, 用户设备在确定源小区信号测量值低于第一测量门限 值后或在检测到源小区禁用后, 确定需要进行小区重选。
在实施中, 用户设备检测广播消息中是否包含小区禁用命令: 如果在广播消息中检测 到小区禁用命令, 则确定源小区禁用。
其中, 用户设备在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区时, 根据是否可以确定备用频点上的小区标识, 对应不同的处理方式, 下面分别进行介绍。
方式一、 用户设备不能确定备用频点上的小区标识。
用户设备从部分或全部备用频点上的所有小区中选择一个小区作为目标小区。
在实施中, 用户设备确定部分或全部备用频点上的部分或全部小区对应的信号测量 值, 从大于第二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值 对应的小区作为目标小区。
比如可以从大于第二测量门限值的信号测量值中选择最大的信号测量值。
较佳地, 用户设备可以先判断用户设备和网络侧设备之间的距离, 若用户设备和网络 侧设备之间的距离小于距离门限值, 用户设备将选择的信号测量值对应的小区作为目标小 区。 具体的判断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区 对应的信号测量值同时进行。 或者
用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可用频点 中是否没有符合小区重选要求的频点, 如果是, 则将选择的信号测量值对应的小区作为目 标小区; 否则, 选择符合小区重选要求的频点。 具体的判断过程可以在用户设备确定小区 对应的信号测量值之前、 之后或与确定小区对应的信号测量值同时进行。
较佳地, 用户设备先判断用户设备和网络侧设备之间的距离时, 如果用户设备和网络 侧设备之间的距离不小于距离门限值, 用户设备可以再判断除备用频点信息中包括的频点 之外的部分或全部其他可用频点中是否没有符合小区重选要求的频点, 如果是, 则将选择 的信号测量值对应的小区作为目标小区; 否则, 选择符合小区重选要求的频点。 具体的判 断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区对应的信号测 量值同时进行
当然, 用户设备也可以不判断用户设备和网络侧设备之间的距离或判断除备用频点信 息中包括的频点之外的部分或全部其他可用频点中是否没有符合小区重选要求的频点, 而 是直接将选择的信号测量值对应的小区作为目标小区。
较佳地, 用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可 用频点中是否没有符合小区重选要求的频点, 如果是, 则用户设备确定小区对应的信号测 量值; 否则用户设备不需要确定小区对应的信号测量值, 而是直接选择符合小区重选要求 的频点。
较佳地, 上述部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的 频点优先级。
确定备用频点的优先级的方式有很多, 比如根据备用频点的可用程度确定其优先级, 备用频点的可用程度越高, 其优先级也越高。
在实施中, 用户设备在确定小区对应的信号测量值时, 可以按照顺序确定备用频点上 的小区对应的信号测量值, 并在一个备用频点上有小区对应的信号测量值大于第二测量门 限值后, 停止确定其他小区对应的信号测量值。 也就是说, 用户设备可以不用确定所有备 用频点, 以及一个备用频点上的所有小区, 只需在确定一个备用频点上的一个小区对应的 信号测量值大于第二测量门限值后, 就可以确定该小区为目标小区, 然后停止在该备用频 点上确定其他小区对应的信号测量值, 以及停止确定其他备用频点上的小区对应的信号测 量值。
上述对于其他频点的 "小区重选要求的具体内容"可以参见 3GPP TS 36.304协议中规 定的小区重选要求, 在此不再赘述。
针对方式一、 用户设备在无法唯一确定小区重选在备用频点上的小区标识时, 仅能确 定目标小区的中心频点集合即小区重选的备用频点集合, 此时小区重选的具体执行方式可 釆取如下方式中的一种:
1、 用户设备开始测量备用频点集合中的备用频点, 当备用频点集合中存在某个备用 频点上信号测量值最好的小区的信号测量值大于预设的第二门限值时, 用户设备重选到备 用频点上的信号测量值最好的小区。 如果备用频点集合中所有备用频点上信号测量值最好 的小区的信号测量值都小于或等于预设的第二门限值时, 用户设备确定备用频点上的信号 测量值最好的小区为目标小区, 并重选到目标小区。
2、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 用户设备开始测量备用频点集合中的备用频点, 当备用频点集合中存在某个备用频 点上信号测量值最好的小区的信号测量值大于预设的第二门限值, 且没有高优先级频点及 同等优先级频点 (与源小区的频点比较) 的小区符合重选要求时, 用户设备确定备用频点 上的信号测量值最好的小区为目标小区, 并重选到目标小区。
3、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 且没有高优先级频点及同等优先级频点的小区符合重选要求时, 用户设备开始测量 备用频点集合中的备用频点, 当备用频点集合中存在某个备用频点上信号测量值最好的小 区的信号测量值大于预设的第二门限值时, 用户设备确定备用频点上的信号测量值最好的 小区为目标小区, 并重选到目标小区。
4、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 用户设备开始测量备用频点集合中的备用频点, 当备用频点集合中存在某个备用频 点上信号测量值最好的小区的信号测量值大于预设的第二门限值, 且没有高优先级频点、 同等频点及低优先级频点 (与源小区的频点比较) 的小区符合重选要求时, 用户设备确定 备用频点上的信号测量值最好的小区为目标小区, 并重选到目标小区。
5、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 且没有高优先级频点、 同等频点及低优先级频点 (与源小区的频点比较) 的小区符 合重选要求时, 用户设备开始测量备用频点集合中的备用频点, 当备用频点集合中存在某 个备用频点上信号测量值最好的小区的信号测量值大于预设的第二门限值时, 用户设备确 定备用频点上的信号测量值最好的小区为目标小区, 并重选到目标小区。
在该方式中, 用户设备可按照备用频点在备用频点集合中的顺序依次针对备用频点集 合中的备用频点执行测量, 也可按照随机顺序针对备用频点集合中的备用频点执行测量, 直到用户设备重选到合适的目标小区, 或者用户设备已经遍历备用频点集合中的所有备用 频点。
在该方式中, 用户设备可在初次测量开启后的设定时长内针对备用频点集合进行测 量, 也可测量 N1次备用频点集合, N1为正整数。
方式二、 用户设备能确定备用频点上的小区标识。
用户设备将源小区的小区标识作为每个备用频点对应的小区标识, 或接收来自网络侧 设备每个备用频点对应的小区标识;
用户设备根据备用频点信息和备用频点对应的小区标识, 确定每个备用频点上的小 区, 并从确定的所有小区中选择一个小区作为目标小区。
在实施中, 用户设备确定部分或全部备用频点上的小区对应的信号测量值, 从大于第 二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作 为目标小区。
较佳地, 用户设备可以先判断用户设备和网络侧设备之间的距离, 若用户设备和网络 侧设备之间的距离小于距离门限值, 用户设备将选择的信号测量值对应的小区作为目标小 区。 具体的判断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区 对应的信号测量值同时进行。 或者
用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可用频点 中是否没有符合小区重选要求的频点, 如果是, 则将选择的信号测量值对应的小区作为目 标小区; 否则, 选择符合小区重选要求的频点。 具体的判断过程可以在用户设备确定小区 对应的信号测量值之前、 之后或与确定小区对应的信号测量值同时进行。
较佳地, 用户设备先判断用户设备和网络侧设备之间的距离时, 如果用户设备和网络 侧设备之间的距离不小于距离门限值, 用户设备可以再判断除备用频点信息中包括的频点 之外的部分或全部其他可用频点中是否没有符合小区重选要求的频点, 如果是, 则将选择 的信号测量值对应的小区作为目标小区; 否则, 选择符合小区重选要求的频点。 具体的判 断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区对应的信号测 量值同时进行
当然, 用户设备也可以不判断用户设备和网络侧设备之间的距离或判断除备用频点信 息中包括的频点之外的部分或全部其他可用频点中是否没有符合小区重选要求的频点, 而 是直接将选择的信号测量值对应的小区作为目标小区。
较佳地, 用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可 用频点中是否没有符合小区重选要求的频点, 如果是, 则用户设备确定小区对应的信号测 量值; 否则用户设备不需要确定小区对应的信号测量值, 而是直接选择符合小区重选要求 的频点。
较佳地, 上述部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的 频点优先级。
确定备用频点的优先级的方式有很多, 比如根据备用频点的可用程度确定其优先级, 备用频点的可用程度越高, 其优先级也越高。
在实施中, 用户设备在确定小区对应的信号测量值时, 可以按照顺序确定备用频点上 的小区对应的信号测量值, 并在一个备用频点上有小区对应的信号测量值大于第二测量门 限值后, 停止确定其他小区对应的信号测量值。 也就是说, 用户设备可以不用确定所有备 用频点上的小区, 只需在确定一个备用频点上的一个小区对应的信号测量值大于第二测量 门限值后, 就可以确定该小区为目标小区, 然后停止在该备用频点上确定其他小区对应的 信号测量值, 以及停止确定其他备用频点上的小区对应的信号测量值。
上述对于其他频点的 "小区重选要求的具体内容"可以参见 3GPP TS 36.304协议中规 定的小区重选要求, 在此不再赘述。
针对方式二、 用户设备在能够唯一确定小区重选在备用频点上的小区标识时, 可备用 频点上的小区标识确定备用小区集合, 并根据备用小区集合确定目标小区。 此时小区重选 的具体执行方式可釆取如下方式中的一种:
1、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 用户设备开始测量备用小区集合中的目标小区, 当备用小区集合中存在某个备用小 区的信号测量值大于预设的第二门限值时, 用户设备确定该备用为目标小区, 并重选到目 标小区。 如果备用小区集合中所有目标小区的信号测量值都小于或等于预设的第二门限值 时, 用户设备执行传统的小区重选过程。
2、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 用户设备开始测量备用小区集合中的目标小区, 当备用小区集合中存在某个目标小 区的信号测量值大于预设的第二门限值, 且没有高优先级频点及同等优先级频点 (与源小 区的频点比较) 的小区符合重选要求时, 用户设备确定该备用为目标小区, 并重选到目标 小区。
3、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 且没有高优先级频率及同等优先级频率的小区符合重选要求时, 用户设备开始测量 备用小区集合中的目标小区, 当备用小区集合中存在某个目标小区的信号测量值大于预设 的第二门限值时, 用户设备确定该备用为目标小区, 并重选到目标小区。
4、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 用户设备开始测量备用小区集合中的目标小区, 当备用小区集合中存在某个目标小 区的信号测量值大于预设的第二门限值, 且没有高优先级频点、 同等频点及低优先级频点 (与源小区的频点比较) 的小区符合重选要求时, 用户设备确定该备用为目标小区, 并重 选到目标小区。
5、 用户设备测量源小区的信号测量值, 当源小区的信号测量值低于预设的第一门限 值时, 且没有高优先级频点、 同等频点及低优先级频点 (与源小区的频点比较) 的小区符 合重选要求时, 用户设备开始测量备用小区集合中的目标小区, 当备用小区集合中存在某 个备用小区的信号测量值大于预设的第二门限值时, 用户设备确定该备用为目标小区, 并 重选到目标小区。
在该方式中, 用户设备可按照目标小区在备用小区集合中的顺序依次针对备用小区集 合中的目标小区执行测量, 也可按照随机顺序针对备用小区集合中的目标小区执行测量过 程, 直到用户设备重选到合适的目标小区, 或者用户设备已经遍历备用小区集合中的所有 目标小区。
较佳地, 上述门限值可在协议中规定; 也可以由网络侧设备设定, 并在小区内广播, 用户设备通过读取广播消息获取预设门限; 也可由用户设备自行设定。
其中, 本发明实施例的信号测量值可以是下列测量值中的至少一个:
参考信号接收功率 (Reference signal received power, RSRP )值、 参考信号接收盾量 ( Reference Signal Received Quality, RSRQ )值、根据 RSRP值确定的测量值和根据 RSRQ 值确定的测量值(后面两个值可以参见 3GPP TS 36.304协议), 以及其他能够反映小区信 号盾量的参数值。
如果信号测量值为上述测量值中的多个, 则在与门限值比较时, 不同的测量值与对应 的门限值进行比较。 比如信号测量值为 RSRP值和 RSRQ值, 在与第一测量门限值进行比 较时, RSRP值与 RSRP值对应的第一测量门限值进行比较, RSRQ值与 RSRQ值对应的 第一测量门限值进行比较。
如果备用频点或小区上的信号测量值为上述测量值中的多个, 如果所有测量值都大于 门限值后, 则确定信号测量值大于门限值; 如果所有测量值中有部分大于门限值, 且大于 门限值的数量多于小于门限值的数量, 则确定信号测量值大于门限值, 还可以只要有所有 测量值中有大于门限值, 则确定信号测量值大于门限值。
如果备用频点或小区上的信号测量值为上述测量值中的多个,可以选择一个信号测量 值(即选择的信号测量值优先级最高), 此时只需要将选择的信号测量值与门限值进行比 较。 优先级可以通过协议静态规定, 或者网络侧设备将选择的优先级通知给用户设备, 或 者用户设备自行决定。
如果源小区上的信号测量值为上述测量值中的多个, 如果所有测量值都低于门限值 后, 则确定信号测量值低于门限值; 或者如果所有测量值中有部分低于门限值, 且低于门 限值的信号测量值的数量多于不低于门限值的信号测量值的数量, 则确定信号测量值低于 门限值, 还可以只要有所有测量值中有低于门限值, 则确定信号测量值低于门限值。
如果源小区上的信号测量值为上述测量值中的多个, 可以选择一个信号测量值(即选 择的信号测量值优先级最高) , 此时只需要将选择的信号测量值与门限值进行比较。 优先 级可以通过协议静态规定, 或者网络侧设备将选择的优先级通知给用户设备, 或者用户设 备自行决定。
本发明实施例的网络侧设备可以是基站(比如宏基站、家庭基站等),也可以是 RN (中 继)设备, 还可以是其它网络侧设备。
如图 2所示, 本发明实施例小区重选的系统中的用户设备包括: 接收模块 200、 目标 小区确定模块 210和重选模块 220。 接收模块 200, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频 点的信息;
目标小区确定模块 210, 用于在确定需要进行小区重选后, 根据备用频点信息, 确定 目标小区;
重选模块 220, 用于根据确定的目标小区进行小区重选。
较佳地, 接收模块 200具体用于:
通过广播方式接收来自网络侧设备的备用频点信息。
较佳地, 目标小区确定模块 210具体用于:
在确定源小区信号测量值低于第一测量门限值后或在检测到源小区禁用后, 确定需要 进行小区重选。
较佳地, 目标小区确定模块 210具体用于:
从部分或全部备用频点上的所有小区中选择一个小区作为目标小区。
较佳地, 目标小区确定模块 210具体用于:
确定部分或全部备用频点上的部分或全部小区对应的信号测量值, 从大于第二测量门 限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作为目标小 区。
较佳地, 目标小区确定模块 210具体用于:
将源小区的小区标识作为每个备用频点对应的小区标识, 或接收来自网络侧设备每个 备用频点对应的小区标识; 根据备用频点信息和备用频点对应的小区标识, 确定每个备用 频点上的小区, 并从确定的所有小区中选择一个小区作为目标小区。
较佳地, 目标小区确定模块 210具体用于:
确定部分或全部备用频点上的小区对应的信号测量值, 从大于第二测量门限值的信号 测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作为目标小区。
较佳地, 目标小区确定模块 210具体用于:
顺序确定备用频点上的小区对应的信号测量值, 并在一个备用频点上有小区对应的信 号测量值大于第二测量门限值后, 停止确定其他小区对应的信号测量值。
较佳地, 目标小区确定模块 210还用于:
确定用户设备和网络侧设备之间的距离小于距离门限值; 或确定除备用频点信息中包 括的频点之外的部分或全部其他可用频点中没有符合小区重选要求的频点之后, 将选择的 信号测量值对应的小区作为目标小区。
较佳地, 目标小区确定模块 210还用于:
确定除备用频点信息中包括的频点之外的部分或全部其他可用频点中没有符合小区 重选要求的频点之后, 确定小区对应的信号测量值。 较佳地, 部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的频点 优先级。
如图 3所示, 本发明实施例小区重选的系统中的另一种用户设备包括: 存储器 230和 处理器 240。
其中, 处理器 240被配置了用于执行上述用户设备侧的方法的计算机程序等, 从而实 现本发明实施例中所述的用户设备侧的功能; 存储器 230, 用于存储该计算机程序的代码, 可以被用于配置所述处理器 240; 处理器 240根据实际需要可以包括基带处理部件、 射频 处理部件等设备, 可以实现数据的收发功能。 下面给出存储器 230和处理器 240的具体的 功能介绍。
处理器 240, 接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的信 息;
处理器 240, 在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区; 处理器 240, 居确定的目标小区进行小区重选。
较佳地, 处理器 240通过广播方式接收来自网络侧设备的备用频点信息。
较佳地, 处理器 240在确定源小区信号测量值低于第一测量门限值后或在检测到源小 区禁用后, 确定需要进行小区重选。
较佳地, 处理器 240从部分或全部备用频点上的所有小区中选择一个小区作为目标小 区。
较佳地,处理器 240确定部分或全部备用频点上的部分或全部小区对应的信号测量值, 从大于第二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应 的小区作为目标小区。
较佳地, 处理器 240将源小区的小区标识作为每个备用频点对应的小区标识, 或接收 来自网络侧设备每个备用频点对应的小区标识; 根据备用频点信息和备用频点对应的小区 标识, 确定每个备用频点上的小区, 并从确定的所有小区中选择一个小区作为目标小区。
较佳地, 处理器 240确定部分或全部备用频点上的小区对应的信号测量值, 从大于第 二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作 为目标小区。
较佳地, 处理器 240顺序确定备用频点上的小区对应的信号测量值, 并在一个备用频 点上有小区对应的信号测量值大于第二测量门限值后, 停止确定其他小区对应的信号测量 值。
较佳地, 处理器 240确定用户设备和网络侧设备之间的距离小于距离门限值; 或确定 除备用频点信息中包括的频点之外的部分或全部其他可用频点中没有符合小区重选要求 的频点之后 , 将选择的信号测量值对应的小区作为目标小区。 较佳地, 处理器 240确定除备用频点信息中包括的频点之外的部分或全部其他可用频 点中没有符合小区重选要求的频点之后, 确定小区对应的信号测量值。
较佳地, 部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的频点 优先级。
如图 4所示, 本发明实施例小区重选的系统中的网络侧设备包括: 频点信息确定模块
300和发送模块 310。
频点信息确定模块 300 , 用于确定备用频点信息, 其中包括至少一个备用频点的信息; 发送模块 310 , 用于向用户设备发送备用频点信息, 以使用户设备在确定需要进行小 区重选后, 根据备用频点信息, 确定目标小区, 并根据确定的目标小区进行小区重选。
较佳地, 备用频点信息中还包括备用频点上的目标小区标识。
较佳地, 发送模块 300具体用于:
通过广播消息向用户设备发送备用频点信息。
较佳地, 发送模块 300具体用于:
将确定的备用频点信息通知用户设备之后, 在确定需要进行频谱切换后, 通知源小区 内的用户设备源小区禁用。
较佳地, 频点信息确定模块 300在确定需要进行频谱切换后, 根据备用频点信息, 确 定目标小区, 并根据确定的目标小区进行频谱切换。
如图 5所示, 本发明实施例小区重选的系统中的另一种网络侧设备包括: 存储器 320 和处理器 330。
其中, 处理器 330被配置了用于执行上述网络设备侧的方法的计算机程序等, 从而实 现本发明实施例中所述的网络设备侧的功能; 存储器 320 , 用于存储该计算机程序的代码, 可以被用于配置所述处理器 330; 处理器 330根据实际需要可以包括基带处理部件、 射频 处理部件等设备, 可以实现数据的收发功能。 下面给出存储器 320和处理器 330的具体的 功能介绍。
处理器 330 , 确定备用频点信息, 其中包括至少一个备用频点的信息;
处理器 330 , 向用户设备发送备用频点信息, 以使用户设备在确定需要进行小区重选 后, 根据备用频点信息, 确定目标小区, 并根据确定的目标小区进行小区重选。
较佳地, 备用频点信息中还包括备用频点上的目标小区标识。
较佳地, 处理器 330通过广播消息向用户设备发送备用频点信息。
较佳地, 处理器 330将确定的备用频点信息通知用户设备之后, 在确定需要进行频谱 切换后, 通知源小区内的用户设备源小区禁用。
较佳地, 处理器 330在确定需要进行频谱切换后,根据备用频点信息, 确定目标小区, 并根据确定的目标小区进行频谱切换。 基于同一发明构思, 本发明实施例中还提供了一种用户设备进行小区重选的方法和网 络侧设备通知用户设备备用频点信息的方法, 由于这些方法解决问题的原理与本发明实施 例小区重选的系统相似, 因此这些方法的实施可以参见系统的实施, 重复之处不再赘述。
如图 6所示, 本发明实施例用户设备进行小区重选的方法包括下列步骤:
步骤 401、 用户设备接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频 点的信息;
步骤 402、 用户设备在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区; 步骤 403、 用户设备根据确定的目标小区进行小区重选。
较佳地, 用户设备通过广播方式接收来自网络侧设备的备用频点信息。
较佳地, 用户设备在确定源小区信号测量值低于第一测量门限值后或在检测到源小区 禁用后, 确定需要进行小区重选。
其中, 用户设备在确定需要进行小区重选后, 根据备用频点信息, 确定目标小区时, 根据是否可以确定备用频点上的小区标识, 对应不同的处理方式, 下面分别进行介绍。
方式一、 用户设备不能确定备用频点上的小区标识。
用户设备从部分或全部备用频点上的所有小区中选择一个小区作为目标小区。
在实施中, 用户设备确定部分或全部备用频点上的部分或全部小区对应的信号测量 值, 从大于第二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值 对应的小区作为目标小区。
较佳地, 用户设备可以先判断用户设备和网络侧设备之间的距离, 若用户设备和网络 侧设备之间的距离小于距离门限值, 用户设备将选择的信号测量值对应的小区作为目标小 区。 具体的判断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区 对应的信号测量值同时进行。 或者
用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可用频点 中是否没有符合小区重选要求的频点, 如果是, 则将选择的信号测量值对应的小区作为目 标小区; 否则, 选择符合小区重选要求的频点。 具体的判断过程可以在用户设备确定小区 对应的信号测量值之前、 之后或与确定小区对应的信号测量值同时进行。
较佳地, 用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可 用频点中是否没有符合小区重选要求的频点, 如果是, 则用户设备确定小区对应的信号测 量值; 否则用户设备不需要确定小区对应的信号测量值, 而是直接选择符合小区重选要求 的频点。
较佳地, 上述部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的 频点优先级。
在实施中, 用户设备在确定小区对应的信号测量值时, 可以按照顺序确定备用频点上 的小区对应的信号测量值, 并在一个备用频点上有小区对应的信号测量值大于第二测量门 限值后, 停止确定其他小区对应的信号测量值。 也就是说, 用户设备可以不用确定所有备 用频点, 以及一个备用频点上的所有小区, 只需在确定一个备用频点上的一个小区对应的 信号测量值大于第二测量门限值后, 就可以确定该小区为目标小区, 然后停止在该备用频 点上确定其他小区对应的信号测量值, 以及停止确定其他备用频点上的小区对应的信号测 量值。
方式二、 用户设备能确定备用频点上的小区标识。
用户设备将源小区的小区标识作为每个备用频点对应的小区标识, 或接收来自网络侧 设备每个备用频点对应的小区标识;
用户设备根据备用频点信息和备用频点对应的小区标识, 确定每个备用频点上的小 区, 并从确定的所有小区中选择一个小区作为目标小区。
在实施中, 用户设备确定部分或全部备用频点上的小区对应的信号测量值, 从大于第 二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作 为目标小区。
较佳地, 用户设备可以先判断用户设备和网络侧设备之间的距离, 若用户设备和网络 侧设备之间的距离小于距离门限值, 用户设备将选择的信号测量值对应的小区作为目标小 区。 具体的判断过程可以在用户设备确定小区对应的信号测量值之前、 之后或与确定小区 对应的信号测量值同时进行。 或者
用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可用频点 中是否没有符合小区重选要求的频点, 如果是, 则将选择的信号测量值对应的小区作为目 标小区; 否则, 选择符合小区重选要求的频点。 具体的判断过程可以在用户设备确定小区 对应的信号测量值之前、 之后或与确定小区对应的信号测量值同时进行。
较佳地, 用户设备可以先判断除备用频点信息中包括的频点之外的部分或全部其他可 用频点中是否没有符合小区重选要求的频点, 如果是, 则用户设备确定小区对应的信号测 量值; 否则用户设备不需要确定小区对应的信号测量值, 而是直接选择符合小区重选要求 的频点。
较佳地, 上述部分其他可用频点为对应的频点优先级不小于源小区所在的频点对应的 频点优先级。
在实施中, 用户设备在确定小区对应的信号测量值时, 可以按照顺序确定备用频点上 的小区对应的信号测量值, 并在一个备用频点上有小区对应的信号测量值大于第二测量门 限值后, 停止确定其他小区对应的信号测量值。 也就是说, 用户设备可以不用确定所有备 用频点上的小区, 只需在确定一个备用频点上的一个小区对应的信号测量值大于第二测量 门限值后, 就可以确定该小区为目标小区, 然后停止在该备用频点上确定其他小区对应的 信号测量值, 以及停止确定其他备用频点上的小区对应的信号测量值。
如图 7所示, 本发明实施例网络侧设备通知用户设备备用频点信息的方法包括: 步骤 501、 网络侧设备确定备用频点信息, 其中备用频点信息包括至少一个备用频点; 步骤 502、 网络侧设备向用户设备发送备用频点信息, 以使用户设备在确定需要进行 小区重选后, 根据备用频点信息, 确定目标小区, 并根据确定的目标小区进行小区重选。
较佳地, 备用频点信息中还包括备用频点上的目标小区标识。
较佳地, 网络侧设备将确定的备用频点信息通知用户设备, 包括:
网络侧设备通过广播消息向用户设备发送备用频点信息。
较佳地, 网络侧设备将确定的备用频点信息通知用户设备之后, 还包括:
网络侧设备在确定需要进行频谱切换后, 通知源小区内的用户设备源小区禁用。
如图 8所示, 本发明实施例认知无线电系统中基站进行频谱切换的方法包括: 步骤 601、 基站在源工作频点上运行;
步骤 602、 基站维护备用频点信息, 并在小区内广播备用频点信息;
步骤 603、 基站决策是否需要执行频谱切换, 如果是, 则执行步骤 604; 否则, 执行 步骤 602;
步骤 604、 基站执行频谱切换过程, 离开源工作频点, 在目标频点恢复小区。
如图 9所示, 本发明实施例认知无线电系统中用户设备进行小区重选的方法包括: 步骤 701、 用户设备在源工作频点上运行;
步骤 702、 用户设备接收广播消息并获取备用频点信息;
步骤 703、 用户设备判断是否需要进行小区重选, 如果是, 则执行步骤 704; 否则, 返回步骤 702;
步骤 704、 用户设备根据最近获取的备用频点信息确定目标小区, 并根据确定的目标 小区执行小区重选过程。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种小区重选的方法, 其特征在于, 该方法包括:
用户设备接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的信息; 所述用户设备在确定需要进行小区重选后, 根据所述备用频点信息, 确定目标小区; 所述用户设备根据确定的所述目标小区进行小区重选。
2、 如权利要求 1 所述的方法, 其特征在于, 所述用户设备接收来自网络侧设备的备 用频点信息, 包括:
所述用户设备通过广播方式接收来自网络侧设备的备用频点信息。
3、 如权利要求 1 所述的方法, 其特征在于, 所述用户设备确定需要进行小区重选, 包括:
所述用户设备在确定源小区信号测量值低于第一测量门限值后或在检测到源小区禁 用后, 确定需要进行小区重选。
4、 如权利要求 1 所述的方法, 其特征在于, 所述用户设备根据所述备用频点信息, 确定目标小区, 包括:
所述用户设备从部分或全部备用频点上的所有小区中选择一个小区作为目标小区。
5、 如权利要求 4 所述的方法, 其特征在于, 所述用户设备从部分或全部备用频点上 的所有小区中选择一个小区作为目标小区, 包括:
所述用户设备确定部分或全部备用频点上的部分或全部小区对应的信号测量值, 从大 于第二测量门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的 'J、 区作为目标小区。
6、 如权利要求 1 所述的方法, 其特征在于, 所述用户设备根据所述备用频点信息, 确定目标小区, 包括:
所述用户设备将源小区的小区标识作为每个备用频点对应的小区标识, 或接收来自所 述网络侧设备每个备用频点对应的小区标识;
所述用户设备根据所述备用频点信息和备用频点对应的小区标识, 确定每个备用频点 上的小区, 并从确定的所有小区中选择一个小区作为目标小区。
7、 如权利要求 6 所述的方法, 其特征在于, 所述用户设备从确定的所有小区中选择 一个小区作为目标小区, 包括:
所述用户设备确定部分或全部备用频点上的小区对应的信号测量值, 从大于第二测量 门限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作为目标 小区。
8、 如权利要求 5或 7所述的方法, 其特征在于, 所述用户设备确定部分或全部备用 频点上的部分或全部小区对应的信号测量值, 包括:
所述用户设备顺序确定备用频点上的小区对应的信号测量值, 并在一个备用频点上有 小区对应的信号测量值大于第二测量门限值后, 停止确定其他小区对应的信号测量值。
9、 如权利要求 5或 7所述的方法, 其特征在于, 所述用户设备将选择的信号测量值 对应的小区作为目标小区之前, 还包括:
所述用户设备确定所述用户设备和所述网络侧设备之间的距离小于距离门限值; 或 所述用户设备确定除备用频点信息中包括的频点之外的部分或全部其他可用频点中 没有符合小区重选要求的频点。
10、 如权利要求 9所述的方法, 其特征在于, 部分其他可用频点为对应的频点优先级 不小于源小区所在的频点对应的频点优先级。
11、 如权利要求 5或 7所述的方法, 其特征在于, 所述用户设备确定小区对应的信号 测量值之前, 还包括:
所述用户设备确定除备用频点信息中包括的频点之外的部分或全部其他可用频点中 没有符合小区重选要求的频点。
12、如权利要求 11所述的方法, 其特征在于, 部分其他可用频点为对应的频点优先级 不小于源小区所在的频点对应的频点优先级。
13、 一种小区重选的方法, 其特征在于, 该方法包括:
网络侧设备确定备用频点信息, 其中包括至少一个备用频点的信息;
所述网络侧设备向所述用户设备发送备用频点信息, 以使所述用户设备在确定需要进 行小区重选后, 根据所述备用频点信息, 确定目标小区, 并根据确定的所述目标小区进行 小区重选。
14、 如权利要求 13 所述的方法, 其特征在于, 所述备用频点信息中还包括备用频点 上的目标小区标识。
15、 如权利要求 13 所述的方法, 其特征在于, 所述网络侧设备将确定的所述备用频 点信息通知用户设备, 包括:
所述网络侧设备通过广播消息向所述用户设备发送备用频点信息。
16、 如权利要求 13~15任一所述的方法, 其特征在于, 所述网络侧设备将确定的所述 备用频点信息通知用户设备之后, 还包括:
所述网络侧设备在确定需要进行频谱切换后, 通知源小区内的用户设备源小区禁用。
17、 一种小区重选的用户设备, 其特征在于, 该用户设备包括:
接收模块, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的 信息;
目标小区确定模块, 用于在确定需要进行小区重选后, 根据所述备用频点信息, 确定 目标小区;
重选模块, 用于根据确定的所述目标小区进行小区重选。
18、 如权利要求 17所述的用户设备, 其特征在于, 所述接收模块具体用于: 通过广播方式接收来自网络侧设备的备用频点信息。
19、 如权利要求 17所述的用户设备, 其特征在于, 所述目标小区确定模块具体用于: 在确定源小区信号测量值低于第一测量门限值后或在检测到源小区禁用后, 确定需要 进行小区重选。
20、 如权利要求 17所述的用户设备, 其特征在于, 所述目标小区确定模块具体用于: 从部分或全部备用频点上的所有小区中选择一个小区作为目标小区。
21、 如权利要求 20所述的用户设备, 其特征在于, 所述目标小区确定模块具体用于: 确定部分或全部备用频点上的部分或全部小区对应的信号测量值, 从大于第二测量门 限值的信号测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作为目标小 区。
22、 如权利要求 17所述的用户设备, 其特征在于, 所述目标小区确定模块具体用于: 将源小区的小区标识作为每个备用频点对应的小区标识, 或接收来自所述网络侧设备 每个备用频点对应的小区标识; 根据所述备用频点信息和备用频点对应的小区标识, 确定 每个备用频点上的小区, 并从确定的所有小区中选择一个小区作为目标小区。
23、 如权利要求 22所述的用户设备, 其特征在于, 所述目标小区确定模块具体用于: 确定部分或全部备用频点上的小区对应的信号测量值, 从大于第二测量门限值的信号 测量值中选择一个信号测量值, 并将选择的信号测量值对应的小区作为目标小区。
24、 如权利要求 21或 23所述的用户设备, 其特征在于, 所述目标小区确定模块具体 用于:
顺序确定备用频点上的小区对应的信号测量值, 并在一个备用频点上有小区对应的信 号测量值大于第二测量门限值后, 停止确定其他小区对应的信号测量值。
25、 如权利要求 21或 23所述的用户设备, 其特征在于, 所述目标小区确定模块还用 于:
确定所述用户设备和所述网络侧设备之间的距离小于距离门限值; 或确定除备用频点 信息中包括的频点之外的部分或全部其他可用频点中没有符合小区重选要求的频点之后, 将选择的信号测量值对应的小区作为目标小区。
26、 如权利要求 25 所述的用户设备, 其特征在于, 部分其他可用频点为对应的频点 优先级不小于源小区所在的频点对应的频点优先级。
27、 如权利要求 21或 23所述的用户设备, 其特征在于, 所述目标小区确定模块还用 于: 确定除备用频点信息中包括的频点之外的部分或全部其他可用频点中没有符合小区 重选要求的频点之后, 确定小区对应的信号测量值。
28、 如权利要求 27 所述的用户设备, 其特征在于, 部分其他可用频点为对应的频点 优先级不小于源小区所在的频点对应的频点优先级。
29、 一种小区重选的网络侧设备, 其特征在于, 该网络侧设备包括:
频点信息确定模块, 用于确定备用频点信息, 其中包括至少一个备用频点的信息; 发送模块, 用于向所述用户设备发送备用频点信息, 以使所述用户设备在确定需要进 行小区重选后, 根据所述备用频点信息, 确定目标小区, 并根据确定的所述目标小区进行 小区重选。
30、 如权利要求 29 所述的网络侧设备, 其特征在于, 所述备用频点信息中还包括备 用频点上的目标小区标识。
31、 如权利要求 29所述的网络侧设备, 其特征在于, 所述发送模块具体用于: 通过广播消息向所述用户设备发送备用频点信息。
32、如权利要求 29~31任一所述的网络侧设备, 其特征在于, 所述发送模块具体用于: 将确定的所述备用频点信息通知用户设备之后, 在确定需要进行频谱切换后, 通知源 小区内的用户设备源小区禁用。
33、 一种小区重选的系统, 其特征在于, 该系统包括:
用户设备, 用于接收来自网络侧设备的备用频点信息, 其中包括至少一个备用频点的 信息; 在确定需要进行小区重选后, 根据所述备用频点信息, 确定目标小区; 根据确定的 所述目标小区进行小区重选;
网络侧设备, 用于确定备用频点信息, 向所述用户设备发送备用频点信息。
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