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WO2014205677A1 - Procédé et dispositif de contrôle d'accès - Google Patents

Procédé et dispositif de contrôle d'accès Download PDF

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Publication number
WO2014205677A1
WO2014205677A1 PCT/CN2013/078007 CN2013078007W WO2014205677A1 WO 2014205677 A1 WO2014205677 A1 WO 2014205677A1 CN 2013078007 W CN2013078007 W CN 2013078007W WO 2014205677 A1 WO2014205677 A1 WO 2014205677A1
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WO
WIPO (PCT)
Prior art keywords
cell
access
path loss
access device
base station
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/078007
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English (en)
Chinese (zh)
Inventor
陈啸
邓天乐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201380002033.3A priority Critical patent/CN104396318B/zh
Priority to PCT/CN2013/078007 priority patent/WO2014205677A1/fr
Publication of WO2014205677A1 publication Critical patent/WO2014205677A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink

Definitions

  • the present invention relates to communications technologies, and in particular, to an access control method and apparatus.
  • HetNet Heterogeneous Network
  • GSM Global System of Mobi
  • Wi-Fi wireless fidelity
  • Pico/Femto cel l The coverage of the macro cell is relatively large, and is mainly used to provide high coverage guarantee.
  • the coverage of the micro cell is relatively small, and is mainly used for hotspot coverage.
  • a typical HetNet scenario is that there are multiple micro cells in the macro cell.
  • micro-cells are gradually increasing, especially micro-areas using Wi-Fi technology are widely deployed; at least one user equipment (User Equipment, UE for short) in the macro cell can be transferred to
  • the micro cell is configured to implement data offloading to the macro cell and alleviate the traffic load of the macro cell.
  • the prior art determines whether the UE moves to the coverage of a certain cell in a heterogeneous network, and the accuracy of the judgment is low.
  • the UE of the macro cell is not actually covered by a certain micro cell, but the judgment result is The coverage of the UE in the micro cell indicates that the UE accesses the micro cell, resulting in poor signal quality of the UE after the access; or the traffic load in the macro cell is large, and the UE signal quality is not good, and the UE In the coverage of the micro cell, but because the judgment result is that the UE is not in the coverage of the micro cell, the UE cannot be instructed to access the micro cell in time, which is not conducive to the improvement of the signal quality of the UE. Summary of the invention
  • the present invention provides an access control method and device, which aims to improve the judgment accuracy of whether the UE is moving within the coverage of the cell, and to control the access of the user equipment more reasonably and accurately.
  • the first aspect provides an access control method, where the method is applicable to a communication system including a first cell and a second cell, where the second cell is a cell under the second access device, and includes:
  • the access condition is corrected, and the corrected access condition of the second cell is used to control the second UE in the first cell to access the second cell.
  • the method further includes:
  • the acquiring the actual between the first UE and the second access device Uplink loss including:
  • the accessing condition of the second cell is: The estimated uplink path loss between a UE and the second access device is within a range of path loss limits corresponding to the coverage of the second cell.
  • the access condition of the corrected second cell is: an estimated uplink path loss between the second UE and the second access device plus a correction After the value, less than the path loss limit; or,
  • the estimated uplink path loss between the second UE and the second access device is greater than
  • the correction value is the difference between the actual path loss between the first UE and the second access device and the estimated uplink path loss between the first UE and the second access device. value.
  • the second access device and the first Access devices have different operating frequencies.
  • an access control device belongs to a communication system that includes a first cell and a second cell, and the second cell is a cell under the second access device, and includes:
  • An access determining unit configured to acquire an estimated uplink path loss between the first user equipment UE and the second access device, where the first UE is a user equipment that accesses the first cell, and determines the estimation Whether the path loss meets the access condition of the second cell;
  • An access indication unit configured to: when the access determining unit determines that the estimated uplink path loss meets an access condition of the second cell, instruct the first UE to access the second cell;
  • An information acquiring unit configured to acquire an actual path loss between the first UE and the second access device
  • condition correcting unit configured to correct the access condition according to the actual path loss and the estimated uplink path loss, where the corrected access condition is used to control a second UE access station in the first cell Said second cell.
  • the access determining unit is further configured to obtain an estimated uplink path loss between the second UE and the second access device. And determining whether the estimated uplink path loss satisfies the corrected access condition;
  • the access indication unit is further configured to: when the access determining unit determines that the estimated uplink path loss meets the corrected access condition of the second cell, instructing the second UE to access the Said second cell.
  • the information acquiring unit is specifically configured to receive an actual path loss between the first UE and the second access device that is sent by the second access device;
  • the information acquiring unit is specifically configured to acquire the received power of the uplink transmission signal and the transmit power of the uplink transmission signal, and obtain the first UE and the second access according to the received power and the transmit power.
  • the access condition of the second cell is: the first UE and the foregoing
  • the estimated uplink path loss between the second access devices is within a range of path loss limits corresponding to the coverage of the second cell.
  • An access device has a different operating frequency.
  • the access control method and device provided by the embodiment of the present invention obtain the estimated uplink path loss before the UE accesses the second cell and the actual path loss after accessing the second cell, and according to the access to the second cell.
  • the condition is corrected, and the path loss difference between the two access devices and the second access device may be reduced as much as possible, so that whether the subsequent UE is in the second cell coverage
  • the judgment accuracy is higher, and thus the access of the user equipment is controlled more reasonably and accurately, and the mistake of the access judgment is reduced.
  • FIG. 2 is a schematic flowchart of an embodiment of an access control method according to the present invention.
  • FIG. 3 is a schematic signaling diagram of another embodiment of an access control method according to the present invention.
  • FIG. 4 is a schematic signaling diagram of still another embodiment of an access control method according to the present invention.
  • FIG. 5 is a schematic diagram of signaling according to still another embodiment of an access control method according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of an access control device according to the present invention.
  • FIG. 7 is a schematic structural diagram of another embodiment of an access control device according to the present invention.
  • FIG. 8 is a schematic structural diagram of an entity of an access control device according to an embodiment of the present invention.
  • data splitting of a macro cell using a micro cell can alleviate the traffic load of the macro cell.
  • An optional scheme for data splitting by using a micro cell is: when the macro base station in the macro cell is heavily loaded, the macro base station may use the feature information for identifying at least one UE served by the macro cell (for example, uplink sounding (Sounding) a time base resource location of a reference signal, a random access preamble sequence of a random access channel (RACH), or the like, sent to a micro base station of the micro cell, where the micro base station identifies the at least one UE and The UEs are monitored for uplink transmission, and the received power of the uplink signal of the UE and the uplink power of the uplink signal of the UE are obtained.
  • uplink sounding Sounding
  • RACH random access preamble sequence of a random access channel
  • an uplink path loss between the UE and the micro cell can be obtained by using an estimation algorithm. Since the UE still accesses the macro cell and has not yet accessed the micro cell, the uplink path loss between the UE and the micro cell obtained in this case is referred to as an estimated uplink path loss.
  • the path loss limit may be obtained by using a statistical algorithm for the uplink path loss of each UE in the coverage area of the micro base station) It is determined whether the UE is within the coverage of the micro cell (for example, if the estimated uplink path loss is less than the path loss limit, indicating that the UE is in the coverage of the micro cell), and then determining whether to transfer the UE to the micro cell.
  • the estimated uplink path loss is the obtained path loss value at the operating frequency of the macro cell, and the path loss limit is The path loss value at the operating frequency of the microcell; and the path loss values are different at different operating frequencies, for example, even if the same signal transmission distance, when the signal is transmitted at 20 Hz and 50 Hz, respectively The corresponding path loss at this distance is different. Therefore, in the embodiment of the present invention, in order to determine whether the UE is in the coverage of the micro cell, the path loss value is directly compared with the path loss threshold not at the same working frequency, and the judgment result is inaccurate, and an access control is proposed. method.
  • the access control method in the embodiment of the present invention is applicable to a process in which a UE accesses from a first cell to a second cell.
  • the first cell and the second cell may be cells that belong to different access devices respectively.
  • a cell served by a first access device such as a macro base station
  • a second access device such as a micro base station.
  • the serving cell is referred to as a second cell, and the working frequencies of the first access device and the second access device may be different; the first cell and the second cell are also cells that can belong to the same access device.
  • the first access device and the second access device are the same access device.
  • FIG. 1 shows an optional application scenario.
  • FIG. 1 is an application scenario diagram of an embodiment of an access control method according to the present invention.
  • Figure 1 shows a typical application scenario of a heterogeneous network HetNet.
  • HetNet heterogeneous network
  • the macro cell is the first cell
  • the micro cell is the second cell.
  • the scenario shown in FIG. 1 is also taken as an example for description.
  • the first cell and the second cell are exemplified in FIG. 1, the specific implementation is not limited to the scenario shown in FIG. 1.
  • the micro base station serving the second cell may also be a wireless local area network (Wireless Local Area Networks, Abbreviation: WLAN) Access Point (AP).
  • WLAN Wireless Local Area Networks
  • AP Access Point
  • the UE is in the macro cell and is served by the macro base station; when the traffic in the macro cell is large and the burden on the macro base station is heavy, if the UE is within the coverage of the micro cell, the Acer The station can control the UE to access the micro cell.
  • the macro base station controls the UE to access the micro cell 2, and the micro cell 2 shares the traffic in the macro cell.
  • it is required to determine whether the UE is in the coverage of the micro cell 2, and if the determination result is yes, instruct the UE to access the micro cell 2 from the macro cell.
  • accurately determining whether the UE is in the coverage of the micro cell is a prerequisite for whether the UE can access the micro cell from the macro cell.
  • FIG. 2 is a schematic flowchart of an embodiment of an access control method according to an embodiment of the present invention. As shown in FIG. 2, the method may include:
  • Step 201 Obtain an estimated uplink path loss between the first UE and the second access device, where the first UE is a user equipment in the first cell where the first access device is located;
  • the first cell is a macro cell
  • the second cell is a micro cell.
  • the first cell is served by the first access device, and the first access device, for example.
  • the macro cell is a macro cell in the macro cell;
  • the second cell is served by the second access device, and the second access device is, for example, a micro base station in the micro cell;
  • the first UE is the UE shown in FIG.
  • the estimated uplink path loss is the estimated path loss between the UE and the micro base station when the UE is in the macro cell and the macro base station provides the UE with the service.
  • the uplink transmit power of the UE is obtained by the macro base station (for example, the macro base station estimates or the UE reports to the macro base station; wherein the macro base station estimates the transmit power, for example, the macro base station utilizes
  • the measurement report sent by the UE obtains the path loss value between the macro base station and the UE, and obtains the transmit power according to the path loss value and the received power of the uplink transmission, and the micro base station according to the macro base station sends the identifier for identifying the UE.
  • the feature information identifies the UE, and listens to the uplink transmission of the UE to obtain a corresponding received power, and estimates an uplink path loss between the UE and the micro base station according to the received power and the transmit power. Since the UE is actually still in the service of the macro cell, the path loss value at the operating frequency of the macro cell is called the estimated uplink path loss.
  • the device that performs the method in this embodiment may be a macro base station or a micro base station, or may be another network entity other than the macro base station and the micro base station, and the other network entity is, for example, a centralized control node.
  • the micro base station transmits the received power detected by itself to the macro base station, and the macro base station obtains an estimated uplink path loss according to the received power and the transmit power; if it is a micro base station Execution, in this step, the macro base station transmits the transmit power to the micro base station, and the micro base station obtains the estimated uplink path loss according to the received power and the transmit power; if it is executed by another network entity, the macro base station and the micro base station in this step The received power or transmit power obtained separately needs to be transmitted to the entity, and the estimated uplink path loss is obtained by the entity.
  • the first UE is instructed to access the second cell where the second access device is located.
  • the road loss limit corresponding to the coverage of the micro cell in which the micro base station is located is defined by the path loss limit, and the path loss limit is, for example, in the micro cell.
  • the path loss limit is, for example, in the micro cell.
  • the uplink path loss of the UE at the edge of the coverage is called a path loss limit. That is to say, if the uplink path loss of a certain UE to the micro base station exceeds the path loss limit, it indicates that the UE is actually not in the micro cell.
  • the estimated uplink path loss is compared with the path loss limit, that is, it is determined whether the UE is in the coverage of the micro cell, so as to determine whether to instruct the UE to access the micro cell to reduce the traffic load of the macro cell.
  • the access condition of the second cell is, for example, "estimating the uplink path loss ⁇ the path loss limit corresponding to the coverage of the micro cell", and comparing the estimated uplink path loss obtained in 201 with the path loss limit. If the estimated uplink path loss is less than the path loss limit, indicating that the access condition is met, that is, the UE is in the coverage of the micro cell, indicating that the UE accesses the micro cell; otherwise, indicating that the UE is not in the micro cell. The coverage does not indicate that the UE accesses the micro cell, and the macro cell still serves the UE.
  • the process of the UE accessing from the macro cell to the micro cell may employ conventional techniques and will not be described in detail.
  • this step may also be performed by a macro base station, a micro base station or other network entity (for example, a centralized control node); if it is performed by a macro base station or other network entity, the micro base station needs to cover the micro area mentioned above.
  • the corresponding path loss limit is sent to the macro base station or other network entity, and the path loss limit is obtained by the micro base station by using a statistical algorithm.
  • the micro base station may according to the path loss of at least one UE that is switched to the micro cell.
  • the existing statistical algorithm obtains the path loss limit Value.
  • the actual path loss between the acquiring UE and the micro base station in this step may be that after the UE accesses the micro cell, the micro base station receives the uplink sent by the UE. Transmitting a signal, and acquiring the received power and the transmit power of the uplink transmission signal, and obtaining the actual path loss according to the received power and the transmit power.
  • the acquiring of the transmit power may be that the UE sends a power control report to the micro base station, where the power control report includes the transmit power of the current uplink transmission, and the micro base station obtains the transmit power by using the power control report.
  • the method of this embodiment is performed by a macro base station or other network entity, the micro base station needs to send the actual path loss to the macro base station or other network entity after obtaining the actual path loss by the above method.
  • the access condition of the second cell is corrected according to the actual path loss and the estimated uplink path loss, and the corrected access condition is used to control access by the second UE in the first cell.
  • the estimated uplink path loss as described above is a path loss value at the operating frequency of the macro cell, and the actual path loss is the operation frequency of the micro cell after the UE accesses the micro cell.
  • the path loss value, and thus the obtained path loss value at the macro cell frequency is different from the path loss value obtained at the micro cell frequency. It is the difference caused by the different frequencies that causes the UE to be inaccurate in the coverage of the micro cell. Therefore, in this embodiment, the access condition is corrected according to the difference, and the purpose of the correction is to try to Eliminate the difference in path loss values caused by different frequencies, so that the access conditions tend to be compared to the path loss values at the same frequency.
  • the estimated uplink path loss is within the range of the path loss limit corresponding to the coverage of the second cell, that is, "estimating the uplink path loss (PL es ) ⁇ the coverage of the micro cell
  • the road loss limit (TH WUN ) " assuming that the difference between the actual path loss and the estimated uplink path loss is the correction value J, indicating the operation frequency of the macro cell and the operating frequency of the micro cell.
  • the path loss difference is J.
  • the pair access conditions can be corrected.
  • the above access condition is corrected to "P + 5 ⁇ THWUN" (corresponding to correcting the estimated uplink path loss, it can be considered PL s +5 reflects when the UE is operating at the frequency of the micro cell, The uplink path loss between the UE and the micro base station), or can also be corrected to "P ⁇ TH WLAN -5 " (corresponding to the correction of the path loss limit, it can be considered that TH WUN _5 reflects when the UE works in the macro cell When the frequency is below, the path loss corresponding to the coverage of the micro cell), the actual two methods for correcting the access conditions are consistent.
  • the correction value used for the correction can be based on the actual path loss and the estimated uplink path loss.
  • the difference is obtained, and the difference is caused by different operating frequencies; therefore, the correction condition is used to correct the access condition, that is, the access condition is corrected to the path loss value at the same frequency as much as possible. Therefore, the judgment result is more accurate, and the UE is determined not to be in the micro-cell coverage, or the UE is judged to be absent in the micro-cell coverage, and the UE is guaranteed to obtain better signal quality.
  • the correction is performed according to the difference of a certain UE.
  • the number of sample values on which the correction value J is obtained may be plural. For example, assuming that a total of five UEs are connected to a micro cell in a macro cell, each macro UE can obtain the macro base station (for example, the macro base station is an execution device) in the process of accessing the macro cell from the macro cell to the micro cell.
  • the actual path loss and the estimated uplink path loss corresponding to the UE, where the actual path loss and the estimated uplink path loss corresponding to each UE are referred to as one sample value; the macro base station obtains 5 corresponding to 5 UEs respectively.
  • Sample values refers to the sample value of successful access, that is, only the UE that successfully accesses the micro cell obtains its corresponding actual path loss and estimated uplink path loss, and constitutes a sample value. .
  • the preset number of sample values can also be set according to actual conditions, for example, every 10 UEs can be corrected once, that is, whenever there are 10 UEs in the macro cell accessing the micro cell,
  • the sample values of 10 UEs are statistically processed to obtain correction values for correction, for example, UE1.
  • UE2, UE3, . . . UE20 The 20 UEs access the micro cell, and may perform correction once for 10 samples of UE1 to UE10, and perform correction once for 10 samples of UE11 to UE20.
  • the correction frequency may be set according to the time interval, for example, every 30 minutes, and the macro base station corrects only the time as the frequency, regardless of how many UEs are accessed within the 30 minutes. Through continuous correction, the accuracy of access judgment can be continuously improved.
  • the macro base station may determine, according to the corrected access condition of the second cell, whether the second UE in the macro cell is within the coverage of the micro cell, and further According to this, it is decided whether to instruct the second UE to access the micro cell; the second UE refers to, for example, another UE other than the first UE, or the first UE that needs to enter the micro cell again.
  • the macro base station may obtain an estimated uplink path loss between the second UE and the second access device in the first cell where the first access device is located; And the second UE is accessed to the second cell where the second access device is located.
  • the UE is in the macro cell, and the macro base station controls the UE to access the micro cell.
  • the micro base station also It is necessary to accurately determine whether the UE is within the coverage of the macro cell. If the UE is within the coverage of the macro cell, the micro base station can control the UE to switch to the macro cell.
  • the estimated uplink path loss is the operating frequency in the micro cell. The resulting path loss value.
  • the access control method in this embodiment may be used not only in the scenario where the first access device and the second access device have the same working frequency, but also obtain the estimated uplink before the UE accesses the second cell. Loss and the actual path loss after accessing the second cell, and correcting the access conditions according to the difference between the two, can reduce the difference between the two operating frequencies as much as possible, so that whether the UE is in the micro The accuracy of the coverage of the area is higher, which further controls the access of the user equipment more reasonably and accurately, reduces the error of the access judgment, and improves the signal quality of the UE.
  • the execution device may be a macro base station, a micro base station, or another network entity.
  • the following describes the flow of performing the access control method by different execution devices:
  • FIG. 3 is a schematic diagram of signaling according to another embodiment of an access control method according to the present invention.
  • a first access device uses a macro base station as an example
  • a second access device uses a micro base station as an example.
  • the station performs the access judgment of the UE and the correction of the access conditions.
  • the following steps may be included, but it should be noted that the embodiment does not limit the execution order of each step:
  • the macro base station configures uplink transmission of the UE.
  • the UE at this time is in the macro cell and is served by the macro base station.
  • the macro base station configuration uplink transmission configuration information includes feature information capable of identifying the UE (for example, a time-frequency resource location of the Sounding signal, a cyclic shift of the sequence, etc.; a time-frequency resource location of the RACH, a random access preamble sequence, etc.).
  • the macro base station sends, to the micro base station, feature information used to identify the UE.
  • the macro base station may send the feature information such as the time-frequency resource location of the sounding signal to the micro base station, so that the micro base station can identify the UE according to the same.
  • the UE performs uplink transmission to the macro base station according to the configuration information.
  • the macro base station acquires a transmit power of the uplink transmission of the UE.
  • the transmit power may be reported by the UE to the macro base station, or may be estimated by the macro base station itself.
  • the micro base station listens to the uplink transmission of the UE to obtain the received power of the uplink transmission signal of the UE.
  • the micro base station may identify the UE according to the feature information of the UE received in 302, and listen to the uplink transmission of the UE, and detect the micro The received power of the base station for this transmission. If the micro cell and the macro cell are different systems, that is, networks of different standards, and different working frequencies are used, an uplink receiver of the same standard as the macro cell may be added to the micro cell, and the micro base station may pass the uplink receiver. Listen for the uplink transmission of the UE.
  • the micro base station sends the obtained received power to the macro base station.
  • the macro base station acquires an estimated uplink path loss between the UE and the micro base station in the macro cell, and determines whether the UE is in the coverage area of the micro cell.
  • the macro base station estimates the uplink path loss between the UE and the micro base station according to the transmission power acquired by the macro base station and the received power received from the micro base station, which is called an estimated uplink path loss.
  • the macro base station compares the estimated uplink path loss with the path loss limit corresponding to the coverage of the micro cell in which the micro base station is located, and determines whether the access condition is satisfied. For details on how to compare and set the access conditions, refer to the first embodiment, and details are not described herein.
  • the access condition If the result of the judgment is that the access condition is met, it indicates that the UE is in the coverage of the micro cell, and then performs 308 after performing 307; otherwise, indicating that the UE is not in the coverage of the micro cell, the UE needs to continue
  • the macro cell remains in the macro cell, and the macro base station does not execute 308. The process ends.
  • the macro base station instructs the UE to access the micro cell.
  • the UE accesses the micro base station according to the indication of the macro base station.
  • the micro base station acquires an actual path loss between the UE and the micro base station.
  • the micro base station sends the actual path loss to the macro base station.
  • the macro base station corrects the access condition according to the difference between the actual path loss and the estimated uplink path loss.
  • the macro base station can perform the correction according to the first embodiment.
  • the macro base station can wait until a preset number of sample values are stored before performing correction: for example, a certain UE in the macro cell accesses the micro cell.
  • the macro base station obtains the sample value corresponding to the UE in the process, and is marked as a sample value a, where the sample value a includes the actual path loss and the estimated uplink path loss corresponding to the UE, but the macro base station may not immediately perform the current path loss.
  • the sample value a can be temporarily stored.
  • the macro base station wait until a sufficient number of UEs in the macro cell access the micro cell, and when the sample value stored by the macro base station reaches a preset number, the macro base station starts to perform correction processing again; for example, calculating a difference corresponding to each sample value, And perform statistical processing to obtain a correction value.
  • the macro base station controls access of the UE according to the corrected access condition.
  • the macro base station After the macro base station corrects the access condition, it will judge according to the corrected access condition in the subsequent UE access determination. For example, if the access condition is corrected to "P +5 ⁇ THWLTM", then it is assumed that there is another UE to perform access judgment, and it is determined whether the UE is located in the coverage of the micro cell, and the obtained P ⁇ corresponding to the UE P THWL AN , will be judged according to the above conditions of "P +5 ⁇ TH WLAN ", so that the result of the judgment will be more accurate than the condition before the correction, since the path loss caused by the different frequencies has been reduced.
  • FIG. 4 is a schematic diagram of signaling of a further embodiment of the access control method according to the present invention.
  • the micro base station performs the UE access judgment and the access condition correction. As shown in Figure 4, it includes: 401.
  • the macro base station configures uplink transmission of the UE.
  • the macro base station sends the feature information of the UE to the micro base station.
  • the UE performs uplink transmission to the macro base station according to the configuration information.
  • the macro base station acquires a transmit power of the uplink transmission of the UE.
  • the micro base station listens to the uplink transmission of the UE to obtain the received power.
  • the macro base station sends the acquired transmit power to the micro base station.
  • the micro base station acquires an estimated uplink path loss between the UE and the micro base station in the macro cell, and determines, according to the estimated uplink path loss, whether the UE is in the coverage area of the micro cell.
  • the micro base station estimates the uplink path loss between the UE and the micro base station according to the received power obtained by itself and the transmit power received from the macro base station, which is called an estimated uplink path loss.
  • the manner of determining whether the UE is in the coverage of the micro cell is the same as that of the macro base station, and will not be described in detail.
  • the access condition If the result of the determination is that the access condition is met, it indicates that the UE is in the coverage of the micro cell, and then performs 409 after performing 407; otherwise, it indicates that the UE is not in the coverage of the micro cell, and the UE needs to remain in the macro cell and continue to perform 408. This process ends.
  • the micro base station notifies the macro base station, and the UE does not need to access;
  • the macro base station After the macro base station obtains the notification, it knows that the UE is not in the coverage of the micro cell and needs to continue to stay in the macro cell, and the macro base station does not need to perform other steps.
  • the manner in which the notification in this step is used may be flexibly set.
  • the information returned by the micro base station to the macro base station may be information indicating that the UE does not access (for example, “0” indicates access, "1” means no access, the micro base station sends "1" to the macro base station; or it may be information indicating "the UE is not in the coverage of the micro cell” (for example, "00" indicates coverage, "01” It indicates that the coverage is not in the coverage, and the micro base station sends "01" to the macro base station. Based on the information, the macro base station can determine that the UE is not required to access.
  • the micro base station notifies the macro base station to indicate that the UE accesses.
  • the method used in the notification in this step is also flexible. For details, refer to 408 and no detailed description is provided.
  • the macro base station instructs the UE to access the micro cell.
  • the macro base station After receiving the notification from the micro base station, the macro base station will instruct the UE to access the micro cell.
  • the UE accesses the micro base station according to the indication of the macro base station.
  • the micro base station acquires an actual path loss between the UE and the micro base station. 413.
  • the micro base station corrects the access condition according to a difference between the actual path loss and the estimated uplink path loss.
  • the micro base station controls access of the UE according to the corrected access condition.
  • FIG. 5 is a schematic diagram of signaling of an access control method according to another embodiment of the present invention.
  • the network access judgment and the access condition correction are performed by other network entities other than the macro base station and the micro base station.
  • the network entity is referred to as a third network entity, such as a centralized control node. As shown in Figure 5, it includes:
  • the macro base station configures uplink transmission of the UE.
  • the macro base station sends the feature information of the UE to the micro base station.
  • the UE performs uplink transmission to the macro base station according to the configuration information.
  • the macro base station acquires a transmit power of the uplink transmission of the UE.
  • the micro base station listens to the uplink transmission of the UE to obtain the received power.
  • the micro base station reports the received power to the third network entity.
  • the macro base station reports the obtained transmit power to the third network entity.
  • the third network entity acquires an estimated uplink path loss between the UE and the micro base station in the macro cell, and determines whether the UE is in the coverage area of the micro cell.
  • the access condition If the result of the determination is that the access condition is met, it indicates that the UE is in the coverage of the micro cell, skipping 509, and continuing to perform 510; otherwise, indicating that the UE is not in the coverage of the micro cell, the UE needs to stay in the macro cell and continue to perform 509. This process ends.
  • the third network entity notifies the macro base station that the UE does not need to access.
  • the third network entity notifies the information content of the macro base station, which can be referred to in Embodiment 3, and is not described in detail.
  • the third network entity notifies the macro base station to indicate UE access.
  • the macro base station instructs the UE to access the micro cell.
  • the UE accesses the micro base station according to the indication of the macro base station.
  • the micro base station acquires an actual path loss between the UE and the micro base station.
  • the micro base station reports the actual path loss to the third network entity.
  • the third network entity calculates a difference between the actual path loss and the estimated uplink path loss.
  • the access conditions of the two cells are corrected;
  • the third network entity controls access of the UE according to the adjusted access condition of the second cell.
  • This embodiment provides an access control device, which can perform the access control method according to any one of the method embodiments of the present invention.
  • the access control device may for example be a macro base station, a micro base station or other network entity, such as a centralized control node or the like.
  • FIG. 6 is a schematic structural diagram of an access control device according to an embodiment of the present invention. As shown in FIG. 6, the device may include: an access determining unit 61, an access indicating unit 62, an information acquiring unit 63, and a condition correcting unit 64. ,
  • the access judging unit 61 is configured to obtain the estimated uplink path loss between the first UE and the second access device, where the first UE is the user equipment of the first cell where the first access device is located, and determine the estimation. Whether the line loss meets the access condition of the second cell;
  • the access indication unit 62 is configured to: when the access determining unit determines that the estimated uplink path loss meets an access condition of the second cell, instruct the first UE to access the second access device Second cell;
  • the information acquiring unit 63 is configured to acquire, in the first UE, the second cell, the actual path loss between the first UE and the second access device;
  • the condition correcting unit 64 is configured to correct an access condition of the second cell according to the actual path loss and the estimated uplink path loss, and is used to control, in the first cell, according to the corrected access condition.
  • the second UE accesses the second cell.
  • the working frequencies of the first access device and the second access device are different.
  • the access determining unit 61 is further configured to acquire an estimated uplink path loss between the second UE and the second access device in the first cell where the first access device is located, and determine the estimated Whether the line loss satisfies the access condition of the corrected second cell.
  • the access indication unit 62 is further configured to: when the access determining unit determines that the estimated uplink path loss meets the corrected access condition of the second cell, instruct the second UE to access the The second cell where the second access device is located.
  • the information acquiring unit 63 is configured to receive the actual path loss sent by the second access device, where the actual path loss is that the second access device accesses the UE in the UE. Obtained after the second cell.
  • the information acquiring unit 63 is configured to acquire the received power of the uplink transmission signal and the transmit power of the uplink transmission signal, and obtain the actual path loss according to the received power and the transmit power.
  • FIG. 7 is a schematic structural diagram of another embodiment of the access control device according to the present invention.
  • the condition correction unit 64 may include: a storage subunit 641, a statistical subunit 642, and a syndrome unit 643;
  • a storage sub-unit 641 configured to store a preset number of sample values, where each of the sample values corresponds to a UE that is accessed from the first cell to the second cell, where the sample value includes: The actual path loss, and the estimated uplink path loss;
  • a statistical sub-unit 642 configured to calculate, for each of the sample values, a difference between the actual path loss and the estimated uplink path loss, to obtain presets respectively corresponding to the preset number of sample values a difference value of the number; and obtaining, according to the preset number of differences, a correction value for correcting the access condition;
  • a correction subunit 643, is configured to correct the access condition using the correction value.
  • the access determining unit 61 determines that the access condition is based on: the estimated uplink path loss is within a range of a path loss limit corresponding to a coverage of the second cell.
  • the condition correcting unit 64 is specifically configured to: correct the estimated uplink path loss in the access condition; or, the path corresponding to the coverage of the second cell in the access condition. The damage limit is corrected.
  • the access control device in this embodiment obtains the estimated uplink path loss before the UE access and the actual path loss after the access by setting the access determining unit, and is connected by the condition correcting unit according to the difference between the two.
  • Conditional correction and other processing can minimize the difference caused by different access frequencies of different access devices, so that the judgment accuracy of the UE in the micro-area coverage is higher, and thus more reasonable and accurate control.
  • the access of the user equipment reduces the error of the access judgment and improves the signal quality of the UE.
  • FIG. 8 is a schematic diagram of an entity structure of an access control device according to an embodiment of the present invention, which is used to implement an access control method according to any one of the first to fourth embodiments of the present invention.
  • the access control device may include: a memory 801, a processor 802, a bus 803, and a communication interface 804.
  • the processor 802 and the memory 801 and the communication interface 804 pass through the bus
  • the 803 connects and completes communication with each other.
  • Processor 802 may be a single core or multi-core central processing unit
  • the memory 801 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the communication interface 804 is configured to communicate with an external device to obtain an estimated uplink path loss between the first UE and the second access device in the first cell where the first access device is located.
  • the memory 801 stores an application; the processor 802 calls an application stored in the memory 801 to determine whether the estimated uplink path loss satisfies an access condition; and determines that the estimated uplink path loss satisfies the second cell.
  • the access condition the first UE is instructed to access the second cell where the second access device is located; and in the case that the first UE accesses the second cell, through the communication interface 804 Acquiring actual path loss between the first UE and the second access device; correcting the access condition according to the actual path loss and the estimated uplink path loss, for correcting according to the The subsequent access condition controls the second UE in the first cell to access the second cell.
  • the processor 802 is further configured to: obtain an estimated uplink path loss between the second UE and the second access device in the first cell where the first access device is located; and determine whether the estimated uplink path loss satisfies the correction. After the estimated uplink loss meets the corrected access condition, the second UE is instructed to access the second cell where the second access device is located.
  • the processor 802 is specifically configured to receive, by using the communication interface 804, the actual path loss sent by the second access device, where the actual path loss is that the second access device accesses the UE. Obtained after the second cell.
  • the processor 802 is specifically configured to receive, by using the communication interface 804, an uplink transmission signal sent by the UE, and acquire a received power of the uplink transmission signal and a transmission power of the uplink transmission signal, according to the received power and the transmission. Power, the actual path loss is obtained.
  • the access control device in the embodiment of the present invention may be the first access device, the second access device, or other network entities.
  • the access control device in the embodiment of the present invention may be the first access device, the second access device, or other network entities.
  • the access control device of this embodiment can reduce the difference caused by different working frequencies of different access devices as much as possible, so that the accuracy of determining whether the UE is moving to a certain cell coverage is higher, and thus more reasonable. And accurately control the access of the user equipment, reduce the error of access judgment, and improve the signal quality of the UE.
  • all or part of the steps of implementing the above method embodiments may be performed by hardware related to the program instructions.
  • the aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: various media that can store program codes, such as ROM, RAM, disk or optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de contrôle d'accès. Le procédé comprend les étapes suivantes : acquérir une perte de chemin de liaison montante estimée entre un premier UE et un deuxième dispositif d'accès dans une première cellule, et si la perte de chemin de liaison montante estimée répond à une condition d'accès, commander alors au premier UE d'accéder à une deuxième cellule, la deuxième cellule étant une cellule dans laquelle le deuxième dispositif d'accès est situé; dans la situation où le premier UE accède à la deuxième cellule, acquérir une perte de chemin de liaison montante effective entre le premier UE et le deuxième dispositif d'accès; et selon la perte de chemin de liaison montante effective et la perte de chemin de liaison montante estimée, corriger la condition d'accès. La présente invention permet de contrôler plus efficacement l'accès d'un équipement utilisateur.
PCT/CN2013/078007 2013-06-26 2013-06-26 Procédé et dispositif de contrôle d'accès Ceased WO2014205677A1 (fr)

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